瑞典专利SE1650423A1 Handheld chainsaw comprising at least one orientation sensor, a method of using the chainsaw and a m

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23 ABSTRACT A handheld power tool (100) coniprising at least one orientation sensor (150) isprovided. The handheld power tool (100) is operatively connected to a controller (160;210) and said controller (160; 210) is configured to receive orientation data from the atleast one orientation sensor (150), wherein the orientation data coniprises inforrnationassociated with an orientation of at least a portion of the handheld power tool (100) andto deterrnine operational data based on the orientation data, said operational datarepresenting work perforrned using the handheld power tool (100). The operational datais deterrnined by deterrnining the orientation of the power tool based on the received orientation data from the at least one orientation sensor (150). To be published with Fig. 2a.
公开号:SE1650423A1
申请号:SE1650423
申请日:2016-03-31
公开日:2017-10-01
发明作者:MARTINSSON Pär；Hallendorff Johan；Wykman Tomas
申请人:Husqvarna Ab；
IPC主号:

专利说明:

IMPROVED HANDHELD POWER TOOL TECHNICAL FIELDThis application relates to an improved handheld power tool and morespecif1cally a -handheld power tool that automatically provides inforrnation relating to the work being done.
BACKGROUND Handheld power tools are commonly used in both commercial and privatesettings to cut, saw or in other ways remove material. Handheld power tools may forexample be used in forestry for removing unwanted trees or bushes or in gardening applications such as cutting high grass or hedges.
When using a handheld power tool in forestry it is benef1cial to keep track ofthe amount of threes being felled, where the felled trees are located, amount of timespent using the working tool and/or the price eamed for each tree. Today the operatorhas to manually write down and calculate this information based on its own knowledgeof the work. This is tiresome and time-consuming for the operator as well as the information can be inaccurate due to human errors.
There is thus a need for an improved handheld power tool system.
SUMMARY It is an object of the teachings of this application to overcome theproblems listed above by providing a handheld power tool comprising at least oneorientation sensor. The handheld power tool is operatively connected to a controller,wherein said controller is conf1gured to receive orientation data from the at least oneorientation sensor, wherein the orientation data comprises information associated withan orientation of at least a portion of the handheld power tool and to determineoperational data based on the orientation data, said operational data representing work performed using the handheld power tool, wherein operational data is deterrnined by deterrnining the orientation of the power tool based on the received orientation data from the at least one orientation sensor.
It is also an object of the teachings of this application to overcome theproblems listed above by providing a method for use in a handheld power toolcomprising at least one orientation sensor, wherein the handheld power tool isoperatively connected to a controller. The method comprises receiving orientation datafrom the at least one orientation sensor, wherein the orientation data compriseinformation associated with an orientation of at least a portion of the handheld powertool, and deterrnining operational data based on the orientation data, said operationaldata representing work performed using the handheld power tool, wherein operationaldata is deterrnined by deterrnining the orientation of the power tool based on thereceived orientation data from the at least one orientation sensor.
It is also an object of the teachings of this application to overcome theproblems listed above by providing a mobile telephone comprising a controller and awireless interface. The controller is conf1gured to establish a connection to a handheldpower tool and to determine operational data based on orientation data, wherein thecontroller receives the orientation data in a partially processed state or unprocessed state.
The inventors of the present invention have realized, after inventive andinsightﬁJl reasoning that by utilizing an orientation sensor in a handheld power tool,operational data may be generated which is used to provide feedback to the user and/orother persons connected to the power tool.
In one embodiment the orientation data from the orientation sensor iscombined with data associated with throttling or revving information to determine thatthe chainsaw is actually being used for cutting the trunk of a tree, i.e. used for felling atree.
One benefit is that the operator or supervisor may receive operational datarelating to the daily work. This data may for example be useful to improve the efficiency and planning. The data may relate to the amount of threes being felled, where the felled trees are located, amount of time spent using the working tool and/or the priceearned for each tree.
Another benefit is that persons not being in the working area can receiveinforrnation regarding the work that is being done. This is beneficial inforrnation forexample a manager of a foresting company having Workers felling trees in differentareas and who wants to keep track of their progress. It may also be beneficialinformation for forest owners that hires operators to fell trees, and where the ownerwants to see if the work is being done on time etc.
Yet a further benefit is that the nearby operators may be wamed when a powertool is an active state in a nearby area. This will decrease the risk of accidents.
Other aspects are defined by the appended patent claims and are furtherexplained in the detailed description section as well as in the drawings.
Other features and advantages of the disclosed embodiments will appear fromthe following detailed disclosure, from the attached dependent claims as well as fromthe drawings. Generally, all terms used in the claims are to be interpreted according totheir ordinary meaning in the technical field, unless explicitly defined otherwise herein.All references to "a/an/the [element, device, component, means, step, etc]" are to beinterpreted openly as referring to at least one instance of the element, device,component, means, step, etc., unless explicitly stated otherwise. The steps of anymethod disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
BRIEF DESCRIPTION OF DRAWINGS The invention will be described in further detail under reference to theaccompanying drawings in which: Fig. 1 shows a schematic view of a handheld power tool according to oneembodiment of the teachings of this application; Figs. 2a-b each shows a schematic view of a chainsaw according to two embodiments of the teachings of this application; Fig. 3a shows a schematic view of a communication system according to oneembodiment of the teachings of this application and Fig. 3b shows a schematic view ofa mobile terrninal according to one embodiment of the teachings of this applications; Figs. 4a-b each shows an exemplified view of a display showing operationaldata according to one embodiment of the teachings of this application; and Fig. 5 shows a ﬂowchart for a method for use in a handheld power tool according to one embodiment of the teachings of this application.
DETAILED DESCRIPTION The disclosed embodiments will now be described more fully hereinafter withreference to the accompanying drawings, in which certain embodiments of the inventionare shown. This invention may, however, be embo died in many different forms andshould not be construed as limited to the embodiments set forth herein; rather, theseembodiments are provided by way of example so that this disclosure will be thoroughand complete, and will fully convey the scope of the invention to those skilled in the art.Like numbers refer to like elements throughout.
Fig. 1 shows a handheld power tool 100 in the form of a chainsaw. It should beappreciated that the chainsaw 100 is merely one example of power equipment thatincludes a working assembly. Thus, example embodiments could also be practiced inconnection with some other power equipment that may include working assemblies ofdifferent types such as power tools used for cutting a variety of materials such as wood,concrete, metal and the like. The handheld power tool 100 could also be a power saw, acut off saw, a sander or other suitable power tools. As seen in Fig. 1 the chainsaw 100may include a housing 110. A power unit (not shown) is arranged inside the housing110 and in some embodiments, the power unit may be either an electric motor or anintemal combustion engine.
The chainsaw 100 may further include a guide bar 120 that is attached to thehousing 110 along one side thereof. A chain 122 may be driven around the guide bar120 responsive to operation of the power unit in order to enable the chainsaw 100 to cuttimber or other materials. The guide bar 120 and the chain 122 may form the working assembly of the chainsaw 100.
The housing 110 may include a fuel tank for providing fuel to the power unitvia removal of fuel cap. The housing 110 may also include or at least partially define anoil reservoir, access to which may be provided to allow the operator to pour oil into theoil reservoir. The oil in the oil reservoir may be used to lubricate the chain 122 as thechain 122 is tumed.
The chainsaw 100 may include a front handle 130 and a rear handle 132. Achain brake and front hand guard 134 may be positioned forward of the front handle 130to stop the movement of the chain 122 in the event of a kickback. In an exampleembodiment, the hand guard 134 may be tripped by rotating forward in response tocontact with a portion of the arm (e.g., the hand/wrist) of the operator of the chainsaw100. In some cases, the hand guard 134 may also be tripped in response to detection ofinertial measurements indicative of a kickback.
The rear handle 132 may include a trigger 136 to facilitate operation of thepower unit when the trigger 136 is actuated. In this regard, for example, when thetrigger 136 is actuated (e. g., depressed), the rotating forces generated by the power unitmay be coupled to the chain 122 either directly (e. g., for electric motors) or indirectly(e.g., for gasoline engines). The term "trigger," as used herein, should be understood torepresent any actuator that is capable of being operated by a hand or finger of the user.Thus, the trigger 136 may represent a button, switch, or other such component that canbe actuated by a hand or portion thereof.
Some power units may employ a clutch to provide operable coupling of thepower unit to a sprocket that tums the chain 122. In some cases (e.g., for a gasolineengine), if the trigger 136 is released, the engine may idle and application of powerfrom the power unit to tum the chain 122 may be stopped. In other cases (e.g., forelectric motors), releasing the trigger 136 may secure operation of the power unit.
Actuation of the trigger 136 may initiate movement of the chain 122 around theguide bar 120. Meanwhile, at least two different events may cause the movement of thechain 122 around the guide bar 120 to be interrupted or stopped. In this regard, forexample, release of the trigger 136 and tripping of the hand guard 134 may causemovement of the chain 122 around the guide bar 120 to be stopped.
In Fig. 2a, ﬁarther parts of the chainsaw 100 are shown. In this embodiment thechainsaw also comprises at least one orientation sensor 150 arranged to detect anorientation of the chainsaw 100 or an orientation of at least a portion of the chainsaw100 (e.g. the guide bar 120, the handle 132 and/or the chain brake). The orientationsensor 150 is connected to a memory 162. The orientation sensor is configured togenerate orientation data comprising inforrnation associated with an orientation of atleast a portion of the chainsaw 100.
The orientation sensor 150 may be a gyroscope, an accelerometer, a capacitivesensor and/or a piezoeletric sensor. It is beneficial if the sensor is small and easilyintegrated in the chainsaw 100, either intemally or extemally. In one embodiment theorientation sensor 150 is extemally arranged on the chainsaw. The sensor 150 may forexample be arranged on a housing arranged in conjunction to the handle of the chainsaw100 or arranged in conjunction with the handle or trigger.
In one embodiment the orientation sensor 150 is arranged inside the guide bar120 in the Working assembly of the chain saw, to accurately determine the orientation ofthe chain 122. In yet another embodiment the orientation sensor 150 is arranged insidethe housing 110 in conjunction to the power unit to for example determine operationalefficiency data associated with inforrnation relating to the power consumption.
In one embodiment the orientation sensor 150 is positioned on the outside ofthe guide bar 120. The orientation sensor 150 may be configured to wirelesslycommunicate inforrnation, such as orientation data, to the controller 160 (for examplearranged in a smart phone 200). The orientation sensor 150 may be a retrof1t devicesuitable for use on existing or conventional chainsaws, such that it can be attached tothe outside of the chainsaw and then transmit orientation data to a controller, forexample arranged in a smart phone 200.
In yet one embodiment, two orientation sensors 150 are arranged in thechainsaw 100, one in the guide bar 120 and one inside or on the housing 110 of thechainsaw 100. Where two or more sensors 150 are used, the first and the second sensordo not need to be of the same kind.
The orientation sensor 150 is able to generate sensors signals relating to changes in direction or acceleration, for example caused by the operator changing the position of the chainsaw 100 (or a portion thereof) during cutting. Output generatedfrom the orientation sensor 150 is orientation data that may be highly relevantinforrnation in order to generate knowledge of the use of the chainsaw 100. Theorientation data may be associated with information relating to changes in angle and/ordirection. The orientation data comprises information associated with an orientation ofat least a portion of the chainsaw 100. The angle and/or inclination in question isrelatiVe to a reference point, such a reference point may for example be the ground, aleVel position, a horizontal plane, etc..
The parts of the chainsaw shown in Figs. 2a-b may be operatively connected toeach other via wireless or wireline connection.
The controller 160 may be implemented using instructions that enablehardware functionality, for example, by using executable computer program instructionsin a general-purpose or special-purpose processor that may be stored on a computerreadable storage medium (disk, memory etc.) 162 to be executed by such a processor.The controller 160 is configured to read instructions from the memory 162 and executethese instructions to control the operation of the chainsaw 100. The controller 160 maybe implemented using any suitable, publically available processor or ProgrammableLogic Circuit (PLC). The memory 162 may be implemented using any commonlyknown technology for computer-readable memories such as ROM, RAM, SRAM,DRAM, FLASH, DDR, SDRAM or some other memory technology.
The controller may be a dedicated controller or the controller may also beconfigured to control other functions.
In one embodiment the controller may be conf1gured to collect informationincluding partial processing, such as formatting, for transmittal to another controller(possibly extemal) for final processing. One example is where the controller of thechainsaw is in communicative contact with a controller of for example a smart phone200 (as seen in Fig. 3) and wherein the final processing is performed in the smartphone.
Fig. 2b shows additional parts of one embodiment of a chainsaw 100. In oneembodiment the controller 160 is connected to the power unit for controlling theoperation of the chainsaw 100 which enables the controller to collect information relating to the work done by the chainsaw 100. The controller 160 is also configured to determine the load exerted on the chain 122, by for example measure the powerdelivered to the motor or by measuring the axle torque exerted by the chain.
In one embodiment the chainsaw 100 further comprises a power unit sensor165 which is able to generate information relating to the number of revolutions and/orthe power used (herein after called the operating efficiency data). Inforrnation of thenumber of revolutions could also be measured from a photodetector or the like. Withthat information, the controller 160 calculates the revolutions per minute (RPM) of thepower unit of the chainsaw 100. Different predeterrnined RPM thresholds may beapplied; so that the operational efficiency data contain information relating to if theRPM is low, medium or high.
If the number of revolutions per minute is decreasing even though the chainsaw100 is using its ﬁ1ll power, this indicates that the chainsaw is cutting (i.e. work is beingdone). This information may be stored as an operational data to show the total time thechainsaw 100 being used to cut trees. If this data is combined with orientation dataobtained from the orientation sensor 150 it is possible to gain operational data such as ifthe chainsaw 100 is felling tree or cutting of the branches of the log.
Furthermore, the chainsaw 100 may comprise a clock or a time measurementsystem 169. This allows for generating time data containing information associated withtime measurement. For example, the time at full power (or above a threshold) may bemeasured which can be used to determine operational data such as the amount of workthat has been done, that is the work is equal to the effect divided by time.
The chainsaw 100 may further comprise a vibration sensor 167 which is able togenerate information relating to the vibration patterns caused during use of the chainsaw1 00.
The chainsaw 100 further comprises a communication interface 164, which isadapted to allow the chainsaw 100 to communicate with other devices through the useof different communication technologies. Such communication technologies may bewired or wireless. Examples of such wired technologies are Universal Serial Bus (USB)and Ethemet to name a few. Examples of such wireless technologies are IEEE 802.11, IEEE 802.15, ZigBee, WirelessHART, WIFI, Bluetooth®, W-CDMA/HSPA, GSM, UTRAN and LTE to name a few. It should be noted that other technologies exist andare taken to be an obvious equivalent for such wireless communication interfaces.
The chainsaw 100 may further comprise or be operatively connected to aposition deterrnining device. In one embodiment the position deterrnining device is aGlobal Positioning System (GPS). However, it should be noted that in otherembodiments the position deterrnining device may also be a Radio FrequencyIdentification (RFID) tag or a Real-time Locating System (RTLS) tag. Reference to aposition deterrnining device should be understood to mean any means by which alocation relative to a base position may be deterrnined and that reference to locationmay mean proximity, direction, or a combination thereof In one embodiment the chainsaw comprises the position deterrnining device. Inone embodiment, the controller is operatively connected to a position deterrniningdevice, meaning that the position data received from the position deterrnining device iscombined with the other data during pre-processing or final processing. One example ofsuch an embodiment is where an extemal position deterrnining device is being used,such as that of a smartphone 200.
The output from the position deterrnining device may also be data that could beobtained and received by the controller. The position data generated from the positiondeterrnining device provides information so that the position of the chainsaw and itsoperator can be deterrnined. The position data obtained during the use of the chainsaw100 may be sent from the communication interface 164 in the chainsaw 100 to a mobileterminal 200 such as a mobile phone, tablet, computer or the like where the operationaldata is generated. Such a system is shown in Fig. 3, where mobile terminal 200 is incommunicative connection with chainsaw 100. Here the mobile terminal 200 is shownin the form of a mobile phone.
The mobile phone 100 comprises a housing 210 in which a display 220 isarranged. In one embodiment the display 220 is a non-touch display. In otherembodiments the display 220 is a touch display. Furthermore, the mobile phone 200comprises two hard-wired keys 230. In this embodiment there are two softkeys 230aand 23 0b, but any number of keys, including none, is possible and depends on the design of the mobile phone 200. In one embodiment the mobile phone 200 is configured to display and operate a virtual key 235 on the touch display 220. It should be noted thatthe number of virtual keys 235 are dependent on the design of the mobile phone 200and an application that is executed on the mobile phone 200.
The mobile terrninal 200 may further comprises a user interface 220, a radiofrequency interface 230, a controller 2l0, a memory 240, applications 250 and aposition deterrnining device 260 as is seen in Fig. 3b.
The user interface is in the mobile phone of Fig. 3 is comprised of the display220, the keys 230, 235, a microphone and a loudspeaker. The user interface (UI) alsoincludes one or more hardware controllers, which together with the user interfacedrivers cooperate with the display 220, keypad 230, as well as various other I/O devicessuch as vibrator, ringtone generator, LED indicator, etc. As is commonly known, theuser may operate the mobile terminal through the man-machine interface thus formed.
As previously mentioned, the mobile phone 200 further comprises a controller2l0 which is responsible for the overall operation of the mobile terminal and ispreferably implemented by any commercially available CPU ("Central ProcessingUnit"), DSP ("digital signal processor") or any other electronic programmable logicdevice, or a combination of such processors and/or other electronic programmable logicdevice. The controller 210 is configured to read instructions from a memory and executethese instructions to control the operation of the mobile terminal 200.
The software modules include a real-time operating system, drivers for a user-machine interface, an application handler as well as various applications. Theapplications 250 are sets of instructions that when executed by the controller control theoperation of the mobile terminal 200. The applications 250 can include a messagingapplication for short messaging service (SMS), multimedia messaging service (MMS)and electronic mail, a media player application, as well as various other applications,such as applications for voice calling, video calling, web browsing, document readingand/or document editing, an instant messaging application, a phonebook application, acalendar application, a control panel application, one or more video games, a notepadapplication, location finding applications, etc.
The mobile terminal 200 may ﬁarther comprise a radio frequency interface 230, which is adapted to allow the mobile communications terminal to communicate with ll other communications terrninals in a radio frequency band through the use of differentradio frequency technologies. Examples of such technologies are W-CDMA, GSM,UTRAN, LTE and NMT to name a few. The controller 210 is configured to operablyexecute the applications 250, such as the voice call and message handling applications,through the RF interface and software stored in the memory.
As previously mentioned the mobile phone 200 may further comprise aposition deterrnining device 260, as already been described.
The communication interface 164 of the chainsaw 100 transmits data (such asorientation data, position data, time data, vibration data, operational efficiency data,etc.) to the mobile terminal using wireless communication. The gained data could forexample be uploaded in an application or webpage in a mobile phone belonging to theoperator, the manager or the forest owner. In this way the work progress of the treefelling could be tracked. The application or webpage in the mobile device may retrievethe data to generate operational which for example could be used to create a map of theprogress, e. g. by drawing up using GPS-inforrnation where each tree has been felled.
The data (such as orientation data, position data, time data, vibration data,operational efficiency data, etc.) discussed herein may be used in different combinationsin order to generate desirable operational data which is relevant to the operator, themanager and/or the owner of the forest. The operational data may for example compriseinformation relating to the work done, remaining work, a map of the cleared area, a mapof an area where work is still needed, the thickness of the trees that had been felled, aprice estimate of the trees being felled and/or an approximation of the calorieconsumption of the operator.
In one embodiment the operational data is shown to the user through thedisplay of the mobile phone. The operational data may be shown as a table presentingthe information or as a map graphically showing at least some of the information, asseen in Figs. 4a-b. An exemplified view of how the presentation of the operational datato the user on the display of the mobile phone may look like is seen in Fig. 4a. In thisexemplified view, the number of felled trees and the number of remaining trees areshown both graphically in a map and as information in text form. In addition thereto, the percentage of work done is presented as well as an estimate price of the wood being 12 felled. In Fig. 4b a table is shown presenting different operational data regarding the useof the chainsaw 100. In this exemplif1ed figure the inforrnation presented is: percentageof work being done, number of felled trees, number of remaining trees, averagethickness of the trees being felled, average length of the trees being felled and thecurrent total price estimate of the trees being felled.
As already discussed above, the conversion of data (relating to orientation,position data, time, vibration and/or operational efficiency) into operational data isconducted by a controller. Preferably, the controller in the mobile terminal 200 is used.Different operational data could be obtained by using different combinations of data.The different data may be weighted differently compared to each other, so that forexample data orientation has more inﬂuence on the generated operational data than forexample vibration data.
Non-limiting examples of how different data can be used to distinguishbetween different operating modes of the chainsaw 100 will now be described. Thedifferent operating modes may relate to what kind of work the chainsaw is used for;such as hinged cuts, felling cuts, limbing or bucking. This inforrnation may be useful togenerate operational data such as the thickness and/or length of the trees being felled,the location of the felled tree and possible how the thickness of the tree varies with thelength of the same.
The process of felling trees involves several steps and it is thus beneficial to beable to distinguish between these steps when processing the data relating to the workwith the chainsaw 100. In order to control the fall of the tree to be cut, it is common touse three main cuts. First two directional, or hinged, cuts are preforrned, one at the topand one at the bottom of the tree to cut out a wedged-shaped piece. This will create ahinge that will steer the tree into the desired felling direction as a felling cut isperformed. In an optional step, a wedge is placed inside the cut to bear the load. Thisstep may also be used after the next step. In the next step a horizontal felling cut is madefrom the opposite side of the wedge. When the hinge is properly set, the felling cut willbegin the fall in the desired direction. Once the three has fallen to the ground, it isbenef1cial to remove all the branches of the log. This step is called limbing. Some of the lower branches of the tree could also be cut before felling the tree. A final optional step 13 is cross cutting the felled log into sections, so called bucking. The above described stepscould thus be seen as different operating modes.
In one embodiment, the controller of either the chainsaw l00 or the mobileterrninal 200 is capable of distinguishing between a first operating mode, a secondoperating mode and a third operating mode, which may be benef1cial in order todetermine operational data such as the amount of work being done. These operatingmodes may be deterrnined by several data, such as orientation data associated withinclination of the chainsaw while being tumed on inclination of the chainsaw whilecutting, time data associated with the time spent cutting at a certain power level,vibration data, position data such as GPS-inforrnation and/or the recent activationhistory.
The first operating mode concems the step of the directional cuts or hinging,where two side cuts are made to create a hinge. This information may be useful whencalculating the thickness of the tree being felled, since a hinged always is cut at apredeterrnine distance in relation to the thickness of the tree. In one embodiment thefirst operating mode is deterrnined by the inclination of the chainsaw. In order to cut ahinge, two cuts having different inclination angle needs to be performed at substantiallythe same position. For example, the first cut may be made by bringing the sawdownwards at an angle of 65 degrees with respect to the longitudinal extension of thetree trunk and the second cut is performed by bringing the saw upwards at an angle of30 degrees with respect to the tree or horizontally. The first operating mode is detectedonce the orientation sensor l50 (possibly in combination with the power unit sensor)detects the two following cuts having different inclination which is within apredeterrnined threshold. The threshold could for example be between 60 to 70 degreesand 25 and 35 degrees (or -l0 to l0 degrees) relative a reference point, respectively.Such a reference point may be relative to level ground. It should be recognized that thethreshold could vary significantly depending on user settings.
In one embodiment the first operating mode is deterrnined using orientationdata, as described above, together with time data . The time the chainsaw l00 is aninclined and active state, e. g. working with directional cuts, is measured. If the measured time is below a higher predeterrnined threshold or between a higher and a 14 lower predeterrnined threshold, a first Operating mode is detected. The lower thresholdcould for example be one second and the higher threshold three seconds.
In one embodiment the first operating mode is deterrnined using orientationdata described above together with operating efficiency data. The operating efficiencydata may comprise inforrnation relating to the power and/or revolutions per minute. Inone embodiment the time which the chainsaw is using the highest power level or apower level above a threshold level is measured. If the measured time is between ahigher and a lower predeterrnined threshold, a first operating mode is detected. Thelower threshold could for example be l second and the higher threshold three seconds.
In one embodiment the first operating mode is deterrnined using the recentactivation history in combination with orientation data, operational efficiency data andtime data. The recent activation history is generated in the controller l60 andsubsequently stored in the memory. The inforrnation of the activation pattem can beused as data to for example estimate the present operating mode.
The second and third operating mode may be deterrnined in the similarmanners as been described with relation to the first operating mode but with differentthreshold values for data relating to inclination (orientation data), time (time data),vibration (vibration data), activation history and/or operational efficiency (operationalefficiency data). The second operating mode may be the felling, where the felling cut ismade and thus the threshold of inclination, time, operational efficiency, vibration and/oractivation history should be set to correspond to the action of felling. Once the operatingmode is detected to be felling, it is possible to gain operational data relating to theposition of the trees being felled as well as the thickness of the tree.
The third operating mode may be limbing, where branches of the log areremoved, and thus the threshold of data relating to inclination, time, operationalefficiency, vibration and/or activation history should be set to correspond to the actionof limbing. Once the operating mode is detected to be limbing, it is possible to gainoperational data relating to the direction and elongation of the tree as well as the lengthof the tree. It may further be possible to determine how the thickness of the tree varies with its length.
As should be apparent from the skilled reader, the operating modes discussedmay be deterrnined using different combinations of data mentioned above. Hence, theoperating modes could be deterrnined using orientation data and time data , orientationdata and operational efficiency data etc.. Furtherrnore, the above described exemplifiedembodiments may be used to deterrnine other operational data than the operatingmodes.
In one embodiment the controller of the mobile terrninal 200 is able tocalculate operational data such as an approximation of the calorie consumption of theoperator. The operational data relating to the calorie consumption may be deterrninedusing position data obtained from the position deterrnining device together withoperational data relating to the work being done as well as information from aaccelerometer sensor arranged in the chainsaw 100. The position deterrnining devicegives information relating to the distance that has been walked during the work session.The accelerometer gives information relating to how much the chainsaw 100 has beenlifted. Furthermore, the work being done can be used to help estimate the calorieconsumption.
In one embodiment the data is sent from the controller of the chainsaw 100 tothe controller of the mobile terrninal 200, where operational data is deterrnined. At leastsome of the operational data is then sent back to the controller of the chainsaw 100 to beshown in a user interface arranged on the chainsaw 100. The user interface may displaya percentage of work being done, the current calorie consumption, the fuel or powerlevel and the like. The user interface may for example comprise a light indicator such asLED, a speaker and/or a screen. The user interface may be arranged on the housing 110of the chainsaw in a position which enables the user to easily see the display. The userinterface may receive commands from the user such as to start the monitoring process,to reset the previous collected data etc..
Fig. 5 shows an example method that the controller 164, according to oneembodiment, is conf1gured to execute. The controller 160 is conf1gured to obtain 402 atleast data. The data is at least obtained from the orientation sensor 150, but may also beobtained from a position deterrnining device, a power unit sensor, a time measurement system and/or from a vibration sensor. 16 In one embodiment the controller 210 is arranged in a mobile device 200having a position deterrnining device. The data generated from the chainsaw, e.g. theorientation data from the orientation sensor 150, operational efficiency data from the apower unit sensor, time data from a time measurement system and/or vibration datafrom a vibration sensor. is transmitted to the controller of the mobile terminal where itis processed together with the data generated from the mobile phone itself (for examplefrom the position deterrnining device).
In a next step the controller deterrnines 404 operational data based on the data.In one embodiment the controller which deterrnines the operational data is arranged inthe mobile phone 200.
In a next step, the controller then presents 406 the operational data to the user.In one embodiment the operational data is presented in the display 220 of the mobiledevice 200. The information may be presented as raw data or as processed data wherethe information is presented in a graph, as seen in Figs. 4a-b. The owner of the mobileterminal may be anybody having an interest of receiving operational data from thepower tool 100.
In yet one embodiment, the operational data is sent from the controller 160 inthe chainsaw to the user interface 168 of the chainsaw 100. The user interface 168 of thechainsaw 100 produces a signal containing the operational data, which is detectable bythe user. The operational data is thus only shown to the operator of the power tool 100.
In yet one embodiment, the operational data is generated in the controller 160of the chainsaw 100. The operational data is then presented in the mobile terminal 200by transmitting 406 a signal from the controller 160 of the chainsaw 100 to thecommunication interface 164 of the chainsaw. The communication interface 164 of thechainsaw 100 then wirelessly transmits a signal, comprising the operational data, to themobile terminal 200. The owner of the mobile terminal may be anybody having aninterest of receiving operational data from the power tool 100.
Furthermore, in an optional step 408 the controller 160 may send out a wirelesswaming signal to nearby operators. In one embodiment the controller 160 of thechainsaw 100 sends out the wireless signal. In yet another embodiment the controller of the mobile terminal 200 sends out the wireless signal. 17 The benefits of such waming signal will now be described. When felling tree itis common, and recommended, not being the only operator working in that area at thattime. The possibly high amount of people Working in the forest increases the risk ofgetting hurt by another operator°s chainsaw. Hence, it would be beneﬁcial if the activechainsaw 100 automatically sends out some kind of warning signals in the present area,the hazard zone, when being used. Once the controller 160 receives informationindicating that the chainsaw 100 is in an active state in a certain area the controller 160will transmit a signal to the communication interface 164 to send out a wireless wamingsignal to nearby operators. The warning signal may be sent as a single signal as soon asthe power tool is activated, but the signal may also be sent out continuously during theuse of the power tool 100.
The waming signal may be sent via Bluetooth and may be received by thenearby operators through their ear protections or helmets having a communicationinterface. The signal could be in the form of an audible signal such as siren, a hapticsignal such as a vibration, a visual signal such as a strobe light or other sensory alarmthat could be arranged on an operator in the form of a helmet or ear protection.
The area that is considered the hazard zone may depend on user settings. In anarea where the sight is good and only a few trees exist, the hazard zone for eachoperator could be smaller. However, if the tree felling is taken place in a fo ggy, bushyforest the risk of not seeing the other operators is higher and thus the area of the hazardzone could be bigger. If using Bluetooth the range of the hazard zone could maximumbe around 100 meters, however if another communication interface is used larger hazardareas could be achieved.
In one embodiment the power tool 100 has a radio frequency alert interface.The radio frequency alert interface is configured to be communicatively connected to anexternal device, such as an earrnuff. The radio frequency alert interface may beconnected to more than one extemal device, so that alerts may be given to more thanone person, thereby increasing the safety in the general area, especially when personsare wearing ear protections. The radio frequency alert interface may be connecteddirectly to the ear protections or through a router. The router may also be connected to a server keeping track of the tree felling activities. For example, if the power tool is 18 arranged in communication with a GPS, the server may determine which trees or wheretrees have been felled, and in any case how many trees that have been felled and at whatrate.
As has been mentioned above, the processing of the data may be performedby the controller of the handheld power tool- at least partially and/or by a controller ofthe smart phone. The smart phone then receives data from the handheld power tool- orrather the orientation sensor - and processes this to determine the data. The processingof the orientation data, and also other data related to engine speed, location etc as hasbeen discussed in the above, may be performed fully or partially in the smart phonewhereby the smart phone receives orientation data that is only or at most partiallyprocessed. The processing of the orientation data, and also other data related to enginespeed, location etc as has been discussed in the above, may be performed fully orpartially in controller of the handheld power tool, whereby the data is transmitted to thesmart phone for final processing or simply for presentation. No difference betweenthese modes have been made herein and all controllers are simply referred to as one andthe same controller. As would be apparent to a person skilled in computer processingthere exist many variation in where exactly to process what data and to cover allpossibilities in one application is an undue burden and that may be accomplishedwithout undue experimentations by a skilled person.
The invention has mainly been described above with reference to a fewembodiments. However, as is readily appreciated by a person skilled in the art, otherembodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims.

权利要求:
Claims (18)
[1] 1. A handheld power tool (100) comprising at least one orientation sensor(150), the handheld power tool (100) being operatively connected to a controller (160;210), wherein said controller (160; 210) is configured to: receive orientation data from the at least one orientation sensor (150), whereinthe orientation data comprises inforrnation associated with an orientation of at least aportion of the handheld power tool (100); and deterrnine operational data based on the orientation data, said operational datarepresenting work perforrned using the handheld power tool (100), wherein operationaldata is deterrnined by deterrnining the orientation of the power tool based on the received orientation data from the at least one orientation sensor (150).
[2] 2. The handheld power tool (100) according to claim 1, wherein the controller(210) is arranged in a mobile terminal (200) being in wireless communication with the handheld power tool (100).
[3] 3. The handheld power tool (100) according to claim 2, wherein the orientationdata is transmitted from the handheld power tool (100) to the mobile terminal (200)through a wireless communication interface (164) arranged in the handheld power tool (100).
[4] 4. The handheld power tool (100) according to claim 1, wherein the controller (160) is arranged in the handheld power tool (100).
[5] 5. The handheld power tool (100) according to claim 4, wherein the handheldpower tool (100) further comprises a user interface (168) and wherein the controller(160) is configured to transmit the operational data to the user interface (168) for producing a signal containing operational data detectable by the user.
[6] 6. The handheld power tool (100) according to claim 5, wherein said userinterface (168) comprises a speaker capable of generating an audible signal to the user and/or a visual indicator generating a signal visible to the user.
[7] 7. The handheld power tool (100) according to any preceding claim, whereinthe handheld power tool (100) is connected to a position deterrnining device (260) andwhere the controller (l60; 260) is further configured to: obtain position data comprising inforrnation of the current position of thehandheld power tool (100) from the position deterrnining device (260); and deterrnine the work that has been perforrned using the handheld power tool(100) based on the received orientation data from the at least one orientation sensor (150) and the position data from the position deterrnining device (260).
[8] 8. The handheld power tool (100) according to any preceding claim, whereinthe handheld power tool (100) further comprises a power unit sensor (165) whichgenerates inforrnation relating to the operating efficiency such as the number ofrevolutions and/or the power used by the handheld power tool (100), wherein thecontroller (160; 260) is ﬁarther configured to obtain orientation data and operationalefficiency data and deterrnine the work that has been perforrned using the handheldpower tool (100) based on the received orientation data from the at least one orientation sensor (150) and the operational efﬁciency data from the power unit sensor (165).
[9] 9. The handheld power tool (100) according to any preceding claim, whereinoperational data is deterrnined using at least one of the following data:orientation data of the handheld power tool (100) generated by the orientationsensor (l50);time data measured from a time measurement system (169);operational efficiency data generated from a power unit sensor (165);vibration data generated from a vibration sensor (167) ; and/or position data from a position deterrnining device (260). 21
[10] 10. The handheld power tool (100) according to any preceding claim, whereinoperational data comprises information of at least one of the following: thickness of thetrees being felled, length of the trees being felled, the location of the trees, how thethickness of the tree Varies with the length, the estimated price of the trees being felled, the amount of work being done and/or the amount of remaining work.
[11] 11. The handheld power tool (100) according to any preceding claim, whereinoperational data comprises information relating to if the handheld power tool (100) is using a first, second or third operating mode.
[12] 12. The handheld power tool (100) according to claim 11, wherein the firstoperating mode relates to directional cuts and hinged cuts, the second operating mode relates to felling cuts and the third operating mode relates to limbing.
[13] 13. The handheld power tool (100) according to any preceding claim, wherein the handheld power tool is a chainsaw (100).
[14] 14. The handheld power tool (100) according to any preceding claim, wherein the controller is comprised in a mobile telephone.(200).
[15] 15. A mobile telephone comprising a controller and a wireless interface,wherein said controller is conf1gured to establish a connection to a handheld power tool(100) and to determine operational data based on orientation data, wherein the controller receives the orientation data in a partially processed state or unprocessed state.
[16] 16. A method for use in a handheld power tool (100) comprising an orientationsensor (150), wherein the handheld power tool (100) is operatively connected to acontroller (160; 210), said method comprises: receiVing orientation data from the at least one orientation sensor (150),wherein the orientation data comprises information associated with an orientation of at least a portion of the handheld power tool (100), and 22 deterrnining operational data based on the orientation data, said operationaldata representing work performed using the handheld power tool (100), whereinoperational data is deterrnined by deterrnining the orientation of the power tool based on the received orientation data from the at least one orientation sensor (150).
[17] 17. The method for use in a handheld power tool (100) according to claim 10,wherein the handheld power tool (100) is further connected to a position deterrniningdevice (260) and where said method further comprises: obtaining position data comprising information associated with the currentposition of the handheld power tool (100) from the position deterrnining device (260);and deterrnining the work that has been performed using the handheld power tool(100) based on the received orientation data from the at least one orientation sensor (150) and the position data from the position deterrnining device (260).
[18] 18. The method for use in a handheld power tool (100), wherein the handheldpower tool (100) further comprises a wireless communication interface (164) and/or auser interface (168), wherein the method further comprises: transmitting the operational data to a mobile terminal (200) through thewireless communication interface (164) and/or transmitting the operational data to the user interface (168) for producing a signal containing operational data detectable by the user of the handheld power tool( 1 00).

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同族专利:

公开号 | 公开日

SE539516C2|2017-10-03|

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法律状态:

优先权:

申请号 | 申请日 | 专利标题

SE1650423A|SE539516C2|2016-03-31|2016-03-31|Handheld chainsaw comprising at least one orientation sensor, a method of using the chainsaw and a mobile telephone to establish a connection to the chainsaw|SE1650423A| SE539516C2|2016-03-31|2016-03-31|Handheld chainsaw comprising at least one orientation sensor, a method of using the chainsaw and a mobile telephone to establish a connection to the chainsaw|

US16/089,085| US11135665B2|2016-03-31|2017-03-29|Handheld power tool|

PCT/EP2017/057366| WO2017167783A1|2016-03-31|2017-03-29|Handheld power tool|

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