瑞典专利SE1350664A1 Liquid level measurement system and method

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专利摘要:
Summary The present invention provides a method and system for level feeding of water shoes in a mobile unit. The system comprises a feeding device, which is arranged for a first feeding of at least one first water level in a first container for water shoes arranged in the mobile unit. The system further comprises a first determining unit, which is arranged to determine an effect at least one environmental factor may have on the feeding of the water level, the at least one environmental factor influencing the mobile unit in such a way that the food values are affected. The system also includes a second determining unit, which is arranged to determine whether the level supply is reliable. The determination of the reliability of the food value is based according to the invention on the effect that at least one environmental factor has had on the food value of the level feed.
公开号:SE1350664A1
申请号:SE1350664
申请日:2013-05-31
公开日:2014-12-01
发明作者:Fredrik Brandt
申请人:Scania Cv Ab；
IPC主号:

专利说明:

TECHNICAL EMBODIMENT The present invention relates to a method for level feeding of water shoes in a mobile unit according to the preamble of claim 1. The present invention also relates to a system arranged for level feeding of water shoes in a mobile unit according to the preamble of claim 22, and a computer program and a computer program product, which implement the method according to the invention.
Background Incorrect background description constitutes a description of the background to the present invention, and does not necessarily have to be prior art.
Mobile devices, such as vehicles or craft, such as ships, aircraft or other mobile devices, often include one or more containers for shoes. These water shoes may include washers which are required by the mobile unit, for example fuel, coolant water, flush water, various types of lubricating water, such as engine or gear oil, hydraulic water shoes, or exhaust gas cleaning additives containing urea or other reducing agent. The water shoes can also include other types of water shoes that are not important for the actual driving of the vehicle. For example, the containers may contain drinking water or other beverages. The containers can also be transport containers, in which liquid shoes are transported in the mobile unit. It should be understood that liquids transported by the mobile device can be of virtually any type of lift, such as chemical liquids, oil heating, or food liquids, since a transport container can be filled with essentially any liquid. In this document, the invention will be discussed mainly for its application in vehicles. However, the person skilled in the art realizes that the invention can also be implemented in essentially all types of mobile units in which water shoes are included in containers, for example the above-mentioned vehicles, ships and aircraft.
Containers for liquids often comprise a measuring device, which is arranged to measure the water level for the liquid in the container, since it is often important to know how much liquid is in the container. For example, for the water tanks that are important for the operation of the mobile unit, it is important to know how much fuel, lubricating water, washer water and / or cooling water is left in the respective container in the mobile unit.
The Darfor Or containers in the mobile unit are often provided with a feeding device comprising one or more of a float, an ultrasonic sensor or flake other device which can register and report a liquid disc in the container. The matte water level can then be used to determine an available volume of water contained in each container.
For mobile units comprising an engine, for example, it is absolutely crucial to be able to rely on the availability of engine and gearbox oil to adequately lubricate the engine and gearbox, respectively. There is also an obligation under certain regulatory requirements to be able to correctly measure the consumption of reducing agents, such as urea or AdBlue, in order to be able to prove that adequate exhaust gas purification has been carried out.
For water shoes that are transported in a transport container in the mobile unit, it is important to be able to monitor the water level in the container to be sure that the container is open. This (Jailer especially in the transport of hazardous liquids, such as various types of chemicals. 3 Brief description of the invention For mobile devices comprising one or more liquid containers with food devices, it is black in a single food case to correctly interpret which real water level a food signal generated by a food device This is due to the fact that the food value for the water level at the food event and / or at the food point is sometimes higher / lower than it should be because the water in the container splashes around in the container and / or has a non This rippling and / or this non-horizontal surface may, for example, be due to the mobile unit accelerating or decelerating, or to, for example, a vehicle comprising the container being on an uphill slope.
In the past, this problem has been solved by averaging the food values from the food device over time. The idea is then that the occasional erroneous values have an outside, and for the supply insignificant, IDA effect the mean value-formed value for the water level if the mean value formation is given over a sufficiently long time. In other words, these previously known solutions have always calculated an average value for the water level over a relatively extended period of time so that occasional incorrect values for the water level will not cause errors in the mobile unit, such as alarm signals, incorrect system controls and the like.
However, it is not always advantageous to average these level food values over time periods. The average value formation distributes the incorrect value over the time period from which the average value formation is made. This also means that even actual (non-incorrect) values are distributed over this time period in a corresponding manner, which means that the mean value formation of the level food values risks "hiding" real deviating values by weighting them together with all 4 other values during the time period. In this way, the formation of the mean value gives a time delay, which means that a rapid real change in the level food values will give a distorted changed average level value.
For example, for a rapidly declining level of engine, torque or brake oil, it is important that the steering and warning system in the mobile unit can as soon as possible determine whether the level is really falling rapidly in order to be able to deploy measures that protect the mobile unit and / or a driver and any passengers.
It is therefore an object of the present invention to provide a method and system for level measurement of liquids in a mobile unit which correctly identifies incorrect values and correct values, respectively.
This object is achieved by the above-mentioned method according to the characterizing part of claim 1. The object is also achieved by the above-mentioned system according to the characterizing part of claim 22 and by the above-mentioned computer program and computer program product.
Through the method and system of the present invention, a plausibility analysis is obtained of whether the food signal / measure value Or has been influenced by environmental factors, which can be used to increase the accuracy of the food values for the water levels.
By utilizing the method and system of the present invention, the reliability of the saturation level saturation can be determined based on whether the mobile unit Or is influenced by environmental factors. Then the meeting can be used with regard to the determined reliability.
Thus, the feed can be interpreted on the basis of the reliability that results from the possible external influence, which means that gains in precision and / or time can be made for the feeds of water levels in the mobile unit.
This Increased speed and / or precision may prevent damage to the mobile device and / or a driver and / or passenger in the mobile device.
Thanks to the present invention, unreliable food values can be discriminated against, for example by being ignored or by taking less account of these unreliable food values, which reduces the risk of erroneous decisions being made based on unreliable food values. Thus, utilization of false level detections can be avoided by the present invention.
The present invention thus results in an overall higher quality of decisions made by control units / control systems in the mobile unit. In addition, rapid changes in the water level can be followed when the present invention is used, which reduces the risk of, for example, engine failure due to rapid leakage of engine oil, or of gearbox failure due to rapidly varnishing gear oil, as the rapidly falling oil level will be easily detected. , such as protective controls and / or alarms, can be designed to ensure that the engine / gearbox is protected.
According to one embodiment of the present invention, the determination of the effect it has on at least one environmental factor on the feed values for the water level in the first container is based on a second feeding of at least a second water level in at least one second container for water shoes arranged in the mobile unit. If the food values for the first container and for the at least one second container 6 move substantially uniformly, it can be concluded that environmental factors reasonably affect the food values, since the environmental factors affect all containers in the mobile unit. Thus, in this case, the food values can be determined as unreliable because they are affected by at least one environmental factor. This embodiment can be implemented with very little addition in complexity, since several liquid containers in today's mobile units, such as in vehicles, are already often equipped with measuring devices.
The present invention can therefore increase the precision of meetings and / or decisions in the mobile unit with very small additions in manufacturing cost and / or complexity.
BRIEF DESCRIPTION OF THE DRAWINGS The invention will be further elucidated below with reference to the accompanying drawings, in which like reference numerals are used for like parts, and in: Figure 1 shows a mobile unit exemplified as a schematic vehicle, Figure 2 shows a flow chart of the process of the present invention. 3 shows a schematic container with measuring points, Figure 4 shows a control unit according to the present invention. Description of Preferred Embodiments Figure 1 schematically shows an exemplary vehicle 100 embodying the present invention. The vehicle 100, which may be a passenger car, a truck, a bus, or another vehicle, includes a driveline, which transmits power to drive wheels 113, 114 of the vehicle 100. The driveline includes an internal combustion engine 101, which in a conventional manner, via a 7 on the shaft 102 of the internal combustion engine 101, is connected to a gearbox 103 via a coupling 106. The internal combustion engine 101 is driven by fuel from a fuel tank 130, which is supplied to the internal combustion engine 101 via a fuel line 131, such as a hose or the like. The engine 101 is lubricated by engine oil, which is collected in an oil hopper and distributed to the engine 101 by the internal parts of the engine when they rotate to the engine 101. The gearbox 103 is lubricated by a gearbox oil, which is located directly in the gearbox space in the axles and gears. and which is distributed among the gearbox 103 when its gears and shafts rotate.
A shaft 107 emanating from the gearbox 103 drives the drive wheels 113, 114 via an end shaft 108, such as e.g. a conventional differential, and drive shafts 104, 105 connected to said end shaft 108.
The vehicle 100 further includes an exhaust gas treatment system 120 for treating / purifying exhaust emissions resulting from combustion in the combustion chamber of the combustion engine 101. The exhaust gas treatment system 120 may comprise a container for reducing agent 121, in which, for example, urea or AdBlue is stored and supplied to the exhaust gas treatment system 120 during its exhaust gas purification.
The internal combustion engine 101 is controlled by the vehicle control system via a control unit 150. Likewise, the clutch 106 and the gearbox 103 can be controlled by the vehicle control system by means of one or more applicable control units (not shown). Of course, the vehicle's driveline may also be of a different type, such as a type with conventional automatic transmission, of a type with a hybrid driveline, etc.
The control unit 150 according to the present invention also comprises a first fixing unit 151 and a second fixing unit 152, and is connected to, and receives mode signals from, at least one feeding device for feeding a liquid level in a container in the vehicle. The first fixing unit 151 and the second fixing unit 152 are described in more detail below. In the example of Figure 1, the control unit 150 is connected to a feed device for leveling the engine oil in the engine 101, to a feed device for leveling the gearbox oil in the gearbox 103, to a feed device for leveling the fuel in the fuel tank 1 and to a feed device for leveling the reducing agent in the tank receives reducing agent 121. Control unit 150 Or Also connected to a leveling device for leveling at least one further liquid in at least one further container 140, which may for example consist of one or more of flushing liquid, cooling liquid and liquid in a transport tank in the vehicle. One skilled in the art will also recognize that substantially any type of liquid hopper containing substantially any type of liquid hoisted fed by a feeder may be connected to the controller to provide all feed signals to the liquid hopper to the controller 150.
Figure 2 shows a flow chart of the process of the present invention. In a first step 201 of the process, a first measurement of at least one first water level is performed in a first container for liquids, where this first container Or is arranged in the mobile unit. For example, having the level of engine oil in the engine 101 of a vehicle 100 may be fed by its feeder.
In a second step 202 of the method, an effect is determined that at least one environmental factor may have on the first measurement in the first step 201. The At least one environmental factor is formed by an environmental factor which affects the mobile unit. For example, the environmental factor may be a lane slope for a lane section on which a vehicle 100 is located.
In a third step 203 of the method of the present invention, it is determined whether the first feed in the first step 201 Or is reliable. This determination of the reliability of the first feed is based on the determination of the impact made in the second step 202 of the process.
By the method according to the present invention, the reliability of the first supply of the water level can be determined based on whether the mobile unit is influenced by environmental factors, after which the supply can then be used with regard to the determined reliability. In other words, it is determined by the mobile unit Or influenced from the outside, after which the food signal / food value from the food device is interpreted on the basis of the reliability that results from the possible influence from the outside. Thus, when the present invention is applied, gains in precision and / or time can be made for the feeds of water levels in the mobile unit.
As a result, unreliable food values can be treated separately, for example by being ignored or by taking less account of these unreliable food values. This significantly reduces the risk of decisions being made based on unreliable food values. This gives an overall higher quality of decisions. In addition, rapid changes in the water level can be used in the present invention, which reduces the risk of, for example, engine failure due to rapid leakage of engine oil.
Previous attempts at solutions to problems with water level feeds have resulted in considerable work and 10 considerable manufacturing costs have been placed on various optimizations of container geometries and / or placements of food points in containers to minimize the impact of environmental factors. By utilizing the present invention, this problem can instead be handled in the software by control units / control systems, which is a considerably less labor-intensive and less costly solution to the problem.
According to an embodiment of the present invention, the determination of whether at least one environmental factor affects the food value can be based on a slope experienced by the mobile unit during the feeding. This inclination a can be either in the direction of travel of the mobile unit and / or at an angle to the direction of travel.
Since the mobile unit is a vehicle, the slope can be the road slope a for a road section on which the vehicle is located. The vehicle inclination a may cid constitute the inclination along the direction of travel of the vehicle and / or the inclination of the vehicle a at an angle to, for example, perpendicular to, the direction of travel of the vehicle. The direction of the gradient slope a may be important for the effect of the gradient slope on the water level feed because the liquid container in which the feed is made may have a geometric design and / or may have a location of the feeding device, which makes the feed more probable for slopes in one direction. If, for example, the feeding point, such as the float or ultrasonic device Or, is located in one end of the container in the direction of travel, but centrally in a direction perpendicular to the direction of travel, then it may cause wagon inclination a in the direction of travel to have a greater effect on feedings. This is described in more detail below. The road slope c can be determined / fed by the vehicle itself, for example by using an accelerometer, a force equation and / or a change of altitude. In systems where information exchange between vehicles is used, a vagal slope and / or information related to a vagal slope c estimated by a vehicle can also be provided to other vehicles, either directly, or via an intermediate unit such as a database or the like. Thus, the road inclination can be determined based on information provided by another vehicle.
The slope a can also be determined based on topographic map data, for example map data from digital maps including topographic information. Often used in determination have positioning information, such as GPS information (Global Positioning System). With the aid of the positioning information, the position of the vehicle in relation to the map data can be determined so that the vaginal slope a can be extracted from the map data. The positioning information can also be based on radar information, on camera information, on information from another vehicle, on positioning information previously stored in the vehicle.
Today's topographic maps, and also today's positioning system, have high accuracy, which means that environmental factors which depend on the slope of a can be determined quickly and accurately in the vehicle.
The road slope a can also be determined based on positioning information and road slope information previously stored in the vehicle, or on information obtained from traffic systems related to the said road section.
In several currently available cruise control systems, map data and positioning information are used for cruise control. Such systems may provide map data and positioning information to the system of the present invention, thereby minimizing the complexity addition for determining the slope.
The inclination that the mobile unit experiences can also constitute a terrain slope if the vehicle is in terrain, that is to say outside the road, for example if the vehicle is a tractor or another off-road vehicle.
The inclination experienced by the mobile unit may also constitute a water inclination caused by said mobile unit in conjunction with one or more formations of water, for example vigor, if the mobile unit is a watercraft, such as a vessel, which is in / on water.
Correspondingly, the slope experienced by the mobile unit can also constitute an air slope a, which is caused by the mobile unit interacting with air. The mobile unit for this embodiment typically includes a flying vehicle, such as an aircraft or a helicopter, which is in the air.
According to one embodiment, it is at least one environmental factor that affects the vehicle depending on how the vehicle is driven. Therefore, the determination of the effect that the at least one environmental factor can have on the supply of the water level can be based on the driving of the vehicle.
If the vehicle is accelerated, this causes an environmental factor that affects the feed, as water shoes in the container in the vehicle move due to the acceleration. The acceleration of the vehicle can thus interact with the design of the container and any objects, for example extraction means, in the container.
Typically, vagrants form in the direction of travel of the vehicle in the 13 tanks in which the vehicle accelerates, which means that the water level determined by the feeding device can correspond directly with the actual water level in the tank.
A slow and / or even acceleration often causes less vague formations in the containers than fast and / or jerky / uneven accelerations. It may be that a slow and / or jam acceleration can be judged to give reliable food values while fast and / or jerky / uneven accelerations give unreliable food values.
Similarly, decelerations of the vehicle affect the supply of water levels in the vehicle's fluid reservoirs, since vagrants are also created in the reservoirs. Although slow and / or even deceleration can give reliable food values while fast and / or jerky / uneven decelerations can give unreliable food values.
Thus, according to the embodiment, the reliability of the first feed can be determined based on whether the vehicle is accelerating / decelerating. Acceleration / deceleration can be determined based on a vehicle speed signal, for example by deriving the speed signal, based on information from an accelerometer, based on positioning information, based on information on requested engine torque, or based on other appropriate information from which acceleration / deceleration can be determined.
Other types of driving of the vehicle can also have an effect on the feeds of water levels in the vehicle's fluid reservoir.
For example, a drive where the vehicle is traveling at a speed v in excess of a checkpoint speed v- _hreshold while the vehicle has a steering wheel angle c in excess of a checkpoint for steering wheel cthreshold can affect the feed. Therefore, according to the embodiment, the reliability of the feed can be determined based on the speed v and the steering angle c.
According to an embodiment of the invention, at least one control unit 150 in the mobile unit, for example in a vehicle 100, comprises information on the degree / extent to which the various respective environmental factors affect the supply of water levels in the containers in the unit. This information may include a location of at least one feeding point in each container and / or a geometry for each container and / or a functional movement of the respective container.
As mentioned above, the geometry of the container and / or the position of the food point in the container can affect how much impact accelerations, decelerations, speeds exceeding the spruce speed v threshold at the same time as steering angle exceeding the spruce cthresholdr slopes and other environmental factors affect the water level. This is schematically exemplified in Figure 3, where a liquid container 300 is exposed to an environmental factor in the form of a vagal slope in the direction of travel, which causes the surface of the liquid 301 to be inclined relative to the container because the container has an angle of inclination corresponding to the horizontal inclination a to the horizontal surface 301. that the location of the food point has a major impact on the food result. As illustrated in the figure, the environmental factor affects the inclination of the food value correspondingly to food points 302, 303 in the spirits of the container in the direction of travel, while the food value is less affected in a food point in the middle of the container. The location of the food points across the direction of travel has a corresponding effect on the food values if the vaginal slope c is directed across the direction of travel.
The geometry of the container can also correspondingly influence the effect of the environmental factors on the measured values, since the design of the volume between the container can counteract or contribute to the effect of the environmental factors on the water surface, and clamed on the water level, in the container. In addition, the geometry of the container, in conjunction with the location of the center of gravity, can affect the effect of environmental factors on food values.
The functional movement of the respective tank of which the at least one control unit 150 has information may, for example, consist of information about how rotating parts inside the motor 101, or rotating gears and shafts of the shaft shaft 103 affect the feeding of water levels in the tanks in the unit. and / or vdxellddsolja.
When developing previous solutions to the present problem, considerable fashion and also considerable manufacturing costs were spent on optimizing geometries and / or placements of centers in containers in order to minimize the impact of the environmental factors. By utilizing the present invention, this problem can instead be handled by control units / control systems in the mobile unit, which is a considerably less costly solution.
According to one embodiment of the present invention, the determination of the effect that the at least one environmental factor has on the feed values for the liquid level is based on a second measurement of at least one second liquid level in at least one second container of vessels arranged in the mobile unit.
Thus, determining the effect of environmental factors on the food values may include an analysis of whether the values for the first measurements of the first water level in the first container and the values for the second feeds of the at least one second water level in the second or at least one second form . For example, the first values obtained in a first container, such as a fuel tank, may be compared with other values obtained in at least one second container, such as a flushing vessel container. If the first values for the first container and the second values for the at least one second container are required in a manner similar in some sense, for example if the values for both containers are affected by a gradient as illustrated in Figure 3, then the analysis can be travels substantially uniformly.
If a uniform change allows several liquid containers to be determined, it can be concluded that environmental factors affect the measurement values, since the environmental factors should affect all containers in the mobile unit. Thus, it can be established that the first measurement of the liquid level in the first container, and also the other measurements in each at least one second container, are not reliable, since they are affected by at least one environmental factor.
If it can be established that a uniform change does not exist for several liquid containers, it can be concluded that environmental factors do not affect the measurement values, since the environmental factors should have affected all containers in the mobile unit. In other words, your values should be reliable.
According to one embodiment, the substantially uniform change in travel involves temporally substantially synchronous reactions, it is to be said that changes in the modalities of the different containers occur substantially simultaneously. According to one embodiment, the substantially uniform change in travel includes similar size changes, it is to be said that changes in the intermediate values occur which are essentially equal in the different containers, since these changes must not be synchronized in time. The substantially uniform change may also include combinations of temporal substantially synchronous responses and similar changes in magnitude.
According to an embodiment of the invention, the first saturation of the first water level is judged to be unreliable because at least one environmental factor has had a significant effect on said first feeding. By significant effect, this can be meant, for example, that the at least one environmental factor causes the food value to deviate by 5-20%, and according to an embodiment by at least 10%, from a real value for the water level.
When the control unit / control system has determined whether the initial measurement of the water level is reliable or not determined according to one embodiment a value of the water level. The value of the liquid level is determined here based on the established reliability of the first feed.
The value of the liquid disk can be determined, for example, by an average value formation, which according to an embodiment of the invention is adapted based on the effect that at least one environmental factor is considered to have on the first measurement.
This adaptation of the mean value formation may include an adaptation of a number of intermediate values that are included in the mean value formation. Here, fewer food values are taken with the first measurements being judged to be reliable, whereby the value for the water level can be determined more quickly when the feeds are reliable. Through this adaptation, a11ts6 rapid changes can be followed if reliable food values exist. Correspondingly, more measures are included in the average value formation if the first measurement is judged to be unreliable. 18 The mean value formation can also be adapted by utilizing weighting factors in the mean value formation so that the food values which are judged to be reliable are given higher weight than the food values which are judged to be unreliable.
Thus, the speed and / or precision of the mean value formation, and thus of the determination of the value of the water level, can be adjusted based on the established reliability of the food values, which is advantageous.
According to another embodiment, the feed is ignored if the first feed of the first water level is judged to be unreliable. This prevents erroneous decisions being made on joke reliable food levels at water levels.
According to an embodiment of the invention, one or more of a control unit and a control system arranged to refrain from performing an action on the supply of the water level is judged to be unreliable. In other words, the control unit / control system refrains from carrying out an action that should have been carried out while the feed had been judged to be reliable. All connected, the control unit / control system's action has the established reliability of the feeds, which means that the occurrence of incorrect actions, which are based on incorrect data, is reduced.
Those skilled in the art will appreciate that the method of level feeding water shoes in a mobile unit, such as a vehicle, aircraft or ship, according to the present invention may additionally be implemented in a computer program, which when executed in a computer causes the computer to perform the method / procedure. The computer program is usually part of a computer program product 403, wherein the computer program product includes an appropriate digital storage medium on which the computer program is stored. The said computer-recordable medium consists of an appropriate 19 memory, such as: ROM (Read-Only Memory), PROM (Programmable Read-Only Memory), EPROM (Erasable PROM), Flash memory, EEPROM (Electrically Erasable PROM), a hard disk drive, etc.
Figure 4 schematically shows a control unit 400. The control unit 400 comprises a computing unit 401, which can be constituted by essentially any suitable type of processor or microcomputer, e.g. a Digital Signal Processor (DSP), or an Application Specific Integrated Circuit (ASIC).
The calculating unit 401 is connected to a memory unit 402 arranged in the control unit 400, which provides the calculating unit 401 e.g. the stored program code and / or the stored data calculation unit 401 need to be able to perform calculations. The calculation unit 401 is also arranged to store partial or final results of calculations in the memory unit 402.
Furthermore, the control unit 400 is provided with devices 411, 412, 413, 414 for receiving and transmitting input and output signals, respectively. These input and output signals may contain waveforms, pulses, or other attributes, which of the input signals receiving devices 411, 413 may be detected as information and may be converted into signals which may be processed by the calculating unit 401. These signals are then provided to the calculating unit 401. The devices 412 414 for transmitting output signals Or arranged to convert calculation results from the calculation unit 401 into output signals for transmission to other parts of the vehicle control system and / or the component (s) for which the signals Or are intended.
Each of the connections to the devices receiving and transmitting input and output signals, respectively, may be one or more of a cable; a data bus, such as a CAN bus (Controller Area Network bus), a MOST bus (Media Orientated Systems Transport bus), or any other bus configuration; or by a wireless connection.
One skilled in the art will appreciate that the above-mentioned computer may be constituted by the computing unit 401 and that the above-mentioned memory may be constituted by the memory unit 402.
In general, control systems in modern vehicles consist of a communication bus system consisting of one or more communication buses for interconnecting a number of electronic control units (ECUs), or controllers, and various components located on the vehicle. Such a control system can comprise a large number of control units, and the responsibility for a specific function can be divided into several control units. Vehicles of the type shown thus often comprise considerably more control units in what is shown in Figure 4, which is a choice for those skilled in the art.
In the embodiment shown, the present invention is implemented in the control unit 400. However, the invention can also be implemented in whole or in part in one or more other control units already existing with the vehicle or in a control unit dedicated to the present invention.
According to one aspect of the present invention, there is provided a system which is provided for level feeding of liquids in a mobile unit, such as for instance a vehicle or a vehicle.
The system comprises a measuring device, which is arranged for a first measurement of at least one first liquid level in a first container for liquid shoes arranged in the mobile unit. The first container may here, for example, be formed by one of the engine 101, the gear lid 103, the fuel tank 130, 21 the reducing agent tank 121 or the further container 140, all of which are shown schematically in Figure 1.
The system according to the invention further comprises a first determining unit 151, which may be included in the control unit 150, and which is arranged to determine an effect At least one environmental factor may have on the first measurement of the weight disc. As described above, it can at least one environmental factor affect the mobile unit in such a way that the midrange values are affected.
The system also includes a second determining unit 152, which may be included in the control unit 150, and is arranged to determine whether the level measurement is reliable. The determination of the reliability of the measurement value is based according to the invention on the effect that at least one environmental factor has had on the measurement value of the level measurement.
The system according to the invention has the advantages described above of the method according to the invention, and can also be arranged to perform all process steps in the embodiments of the invention described above and in the claims.
Those skilled in the art will also appreciate that the above system may be modified according to the various embodiments of the method of the invention. In addition, the invention relates to a motor vehicle 100, for example a truck or a bus, or a vehicle, such as an aircraft or a ship, comprising at least one system for leveling watering shoes according to the invention.
The present invention is not limited to the above-described embodiments of the invention but relates to and encompasses all embodiments within the scope of the appended independent claims. 22

权利要求:
Claims (3)
[1]
A measuring device (302, 303, 304), arranged for a first feeding of at least one first water level in a first container (101, 103, 130, 121, 140) for water shoes arranged in the said mobile unit (100);
[2]
A first determining unit (151), arranged to determine an effect At least one environmental factor may have on said first supply, said at least one environmental factor influencing said mobile unit (100);
[3]
A second determining unit (152), arranged for determining said first measurement is reliable, said determining being based on said determining said effect of said at least one environmental factor.

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同族专利:

公开号 | 公开日

SE538093C2|2016-03-01|

WO2014193294A3|2015-01-22|

WO2014193294A2|2014-12-04|

引用文献:

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

GB1347307A|1971-09-28|1974-02-27|Westland Aircraft Ltd|Liqueid level indicators|

FR2581187B1|1985-04-29|1989-09-15|Aerospatiale|DEVICE FOR INDICATING THE QUANTITY OF A LIQUID IN A TANK AND TANK PROVIDED WITH SUCH A DEVICE.|

US8401761B2|2009-07-09|2013-03-19|Ford Global Technologies, Llc|Fuel indicator method|

DE102010029775A1|2010-06-08|2011-12-08|Robert Bosch Gmbh|Method for checking the plausibility of a tank level sensor|

SE536066C2|2011-10-05|2013-04-23|Scania Cv Ab|Level measurement system, and method in a level measurement system|DE102018221379A1|2018-12-11|2019-12-05|Zf Friedrichshafen Ag|System for determining an operating condition of a vehicle|

法律状态:
2021-10-05| NUG| Patent has lapsed|

优先权:

申请号 | 申请日 | 专利标题

SE1350664A|SE538093C2|2013-05-31|2013-05-31|System and method for level measurement of liquids in mobile unit|SE1350664A| SE538093C2|2013-05-31|2013-05-31|System and method for level measurement of liquids in mobile unit|

PCT/SE2014/050636| WO2014193294A2|2013-05-31|2014-05-23|System and method for level measurement of liquids|

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