• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Security band device for automatic door comprising a deformable safety band comprising inside a contact sensor that contains two electrically conductive elements next to each other, a resistor that electrically connects both conductors and a controller with means to measure the value of the electrical resistance existing between both conductors, characterized in that the band also has means for measuring the capacitance of the contact sensor with respect to a ground reference, in order to detect the presence of objects in the vicinity of the band of security during the movement of the door. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2649060A1
    申请号:ES201630924
    申请日:2016-07-07
    公开日:2018-01-09
    发明作者:Karel VOGEL；Ricard Renalias Zueras；Jordi BERINGUES ALGUÉ
    申请人:Jcm Tech S A；JCM TECHNOLOGIES SA；
    IPC主号:
    专利说明:

    image 1 DESCRIPTION
    Safety band device for automatic door
    The present invention refers to a safety band for automatic door.
    Safety bands for automatic doors are known. Said safety bands have the purpose of detecting an unwanted contact during the door travel and are placed on a moving end of said door. They are usually made
    10 based on a hollow profile of elastomeric material in which there is a contact sensor inside, so that when the band deforms, for example, because it encounters an obstacle, the sensor detects the contact.
    It is known that the sensor is resistive. This type of sensor usually consists of
    15 two conductive elements close to each other and which are joined at one end by a resistance of known value. When the band deforms, the conductors come into contact with each other and therefore the value of the measurable resistance at the opposite end to the resistance drops sharply as a result of the contact between conductors. A problem with this type of bands is that it requires contact with the object to be
    20 produce detection. As a consequence, a high speed of the door can lead to damage to the object contacted.
    On the other hand, German Patent documents DE102008003186 and US Patent US2006071624 disclose automatic garage doors that comprise a capacitive sensor that allow an obstacle to be detected without contact, by measuring the capacitance value of an antenna with Regarding your surroundings. These types of sensors present two problems. The first is that an object could, in principle, not cause a capacitance value, or be too small to be detected, and that the contactless detection in the vicinity of the closing point is
    30 impossible.
    It is an objective of the present invention to disclose a new safety band that is capable of detecting contact obstacles but does not present any of the aforementioned drawbacks without supposing cost overruns in the manufacture thereof.
    In particular, the present invention discloses an automatic door safety band consisting of a deformable element comprising in its interior a contact sensor consisting of two electrically conductive elements close to each other, a resistor that electrically connects both conductors. and a media controller
    image2
    5 to measure the value of the electrical resistance between both conductors, characterized in that the band also has means to measure the capacitance of the contact sensor with respect to a ground reference, in order to detect the presence of objects in the proximity of the safety band during door movement.
    The present invention intends to use the conductive elements of the contact sensor as the antenna of a capacitive remote sensing sensor. In this way, a contact sensor can be used as a remote object detector.
    Preferably, the controller is configured to consecutively and repetitively measure the said resistance value between both conductors and the said capacitance value of the conductor. This alternation between one type of behavior and another allows a combination of both types of detection to be obtained without the presence of the disadvantages inherent to each of the systems. In particular, because the controller is
    20 continuously checking the resistance value, an obstacle not detectable (or detected) by the capacitive sensor, will be detected at the moment when the band is deformed. On the other hand, in the vicinity of the closed position, the contact resistive sensor system is still fully operational, so the detection is not canceled, as happens with capacitive sensors. All this without, in a general case,
    25 a contact with the obstacle is necessary for its detection.
    Preferably, the capacitance measuring means comprise an electrical connection to a ground reference that has a switching element of said connection, said switching element being operated from the controller.
    30 In this application, “land reference” is understood as what is commonly referred to as “land” in the electric field. However, the electrical "earth" does not necessarily coincide with the physical earth, but a known reference point (which may be the earth, in a physical sense) is sufficient.
    35 The switch can be a contact, a transistor or a MOSFET transistor. It can also be of any other type.
    image3
    Preferably, the controller is configured to open the switch and thereby cut off said connection to a ground reference for capacitance measurement, closing the switch again for resistance measurement.
    The said resistance value may be measured by any known means, for example, by a voltage divider.
    The present invention discloses an element capable of measuring and treating variations in the resistive value of a safety band and also of the variations in the capacitive value with respect to its surroundings.
    15 The detection of variations in the resistive value guarantee safety, avoiding crushing, while the detection of variations in the capacitive value serve to avoid contacts and / or to give a warning. The warning can be used, if desired, to modify the speed of the door, decreasing it, waiting to confirm the detection by contact, or reverse the movement, or completely stop the door. The
    20 speed reduction allows to obtain speeds of doors greater than those obtained with the doors with contact safety band of known type. Additionally, it solves the problem of detection in the vicinity of the closing position associated with capacitive sensors.
    The controller of the device object of the present invention can be arranged in the band, in the automatic door in a different location from that of the band or outside the door, or it can be distributed between said locations.
    The present invention also comprises automatic doors comprising the device according to the present invention.
    For better understanding, some drawings of an embodiment of the present invention are attached by way of explanatory but not limiting example.
    Figure 1 shows a security band of the resistive type belonging to the device according to the present invention.
    image4
    Figure 2 shows an electrical arrangement scheme of an object according to the present invention.
    5 The safety band of the example of figure 1 comprises a closed -14 profile containing inside two conductive elements -12-, -13-close to each other and joined at one of its ends by means of a resistor -11-, whose resistance is known. In the event that the lower edge of the band contacts an object, the profile -14-deforms, causing a short circuit that bridges the resistor -11- and causes, at the opposite end
    10 to the resistor the resistance value decreases from a value close to that of the resistor -11- to a value close to zero. The band is closed with two covers -15-, -15’-. Measuring elements and control elements can be placed on the covers, or they can be placed in a special box in another location of the door, or even outside it.
    Figure 2 schematically shows the elements of a device according to the present invention, including the safety band -1-of the previous figure. With respect to figure 1, elements equal or equivalent to those of figure 1 have been identified with identical numerals.
    As shown in Figure 2, the safety band -1- has been schematically represented, with the resistor -11- and the conductive elements -12-and -13-. The capacitance value of the band with respect to the environment has also been represented as a capacitor -19-connected to a ground reference, although it should be taken into account that there is no such capacitor nor any cable that connects it to the band and a reference of
    25 earth
    In a preferred embodiment, both the conductive element -12- and the conductive element -13- have a connection to the controller -2- (for reasons of clarity both connections have not been represented). Having these connections allows measuring the apparent capacitance from any of the conductors -12-, -13-. This arrangement is advantageous because the proximity of the metal door to one of the conductors -12-, -13- can affect the measurement. In this way, you can choose to read from the driver -12-, -13-farther to the metal door. (Which driver is the farthest may depend on the shape of the door and how the installation is done).
    The device also comprises a microprocessor -2-which is responsible for carrying out the measurements of both the resistance value and the capacity of the band -1-, as well as how to operate the different elements. Said microprocessor -2-can be placed in the band, in the door comprising the band or in any other location.
    image5
    5 The device also comprises a voltage generator -22- and an additional resistor -21 located in parallel to the current generator -22- and in series with the resistor -11-of the band, such that a voltage divider is obtained , which allows measuring and checking if the resistance value of the band corresponds to the resistance value of the resistor -11-.
    The example shown also comprises a switch -3- that electrically connects the band with a ground reference. Said switch -3- is controlled by microprocessor -2-. In the example shown, the switch -3- is located outside the microprocessor -2-. However, switch -3- could be located inside the
    15 microprocessor
    The microprocessor is configured to alternately alternate resistance and band capacity measurements.
    20 To measure the resistance value of the band, a voltage difference is caused, for example by the current generator or otherwise, and a voltage value between two points is measured that depends on the resistance value of the band, thanks to the tension divider. With this voltage value and the resistance value of the resistor -21- the resistance value of the band is estimated. Different types of splitter can be chosen from
    25 voltage and different points can be chosen for voltage measurement. During this measurement, the band must be electrically connected to a ground reference, so switch -3- will be closed by microprocessor -2-. In the specific case of the example, a voltage difference between the resistance -21- and the generator -11- is caused for the measurement and the voltage value at the intermediate point is measured. In this case, it is not
    30 necessary to use the current generator.
    To measure the capacity, it is necessary to open the switch -3-, since it is a requirement that no current flows through the sensor. The equipment will give current to the band, and the processor will calculate a capacity value based on the relationship between voltage and time, expressed
    35 by the function -29-in Figure 2. The object detection is produced by a variation in the capacitive value of the band -1-.
    image6
    After each capacitance measurement, the capacitor -19- must be discharged, for example by means of a ground connection.
    The device object of the present invention can be a module within a set or operate autonomously and transmit the measured values and / or their processed results, via cable or radio, to a central controller.
    While the invention has been presented and described with reference to embodiments thereof,
    10 it will be understood that these are not limiting of the invention, so that multiple constructive or other details could be variable that may be evident to the technicians of the sector after interpreting the subject matter disclosed in the present description, claims and drawings . Thus, all variants and equivalents will be included within the scope of the present invention if they can be considered
    15 within the broadest scope of the following claims.
    权利要求:
    Claims (9)
    [1]
    image 1
    1. Safety band device for automatic door comprising a deformable safety band comprising inside a contact sensor containing two electrically conductive elements close to each other, a resistor that electrically connects both conductors and a controller with means for measure the value of the existing electrical resistance between both conductors, characterized in that the band also has means to measure the capacitance of the contact sensor with respect to a ground reference, in order to detect the presence of objects in the vicinity
    10 of the safety band during the movement of the door.
    [2]
    Device according to claim 1 or 2, characterized in that the capacitance measuring means comprise an electrical connection to a ground reference that has a switching element of said connection, said element being
    15 switch operated from the controller.
    [3]
    3. Device according to claim 2, characterized in that the switching element is a contact or a transistor.
    Device according to claim 3, characterized in that the contact element is a MOSFET transistor.
    [5]
    5. Device according to claim 2, characterized in that it comprises a divider of
    voltage for resistance value measurement. 25
    [6]
    6. Device according to any of claims 2 to 5, characterized in that the switching element is an internal element of the controller.
    [7]
    7. Device according to any of the preceding claims, characterized in that the
    The controller is configured to consecutively and repetitively measure the said resistance value between both conductors and the said capacitance value of the conductor.
    [8]
    8. Device according to claim 7 depending on any of claims 2 to 4, characterized in that the controller is configured to open the
    35 switch and thereby cut off said connection to a ground reference for capacitance measurement, closing the switch again for resistance measurement.
    8
    image2
    [9]
    9. Device according to any one of claims 1 to 8, characterized in that the controller is configured to send a signal of decrease of the speed of the door if the means for measuring the capacitance detect the presence of objects in the vicinity of the safety band during The movement of the door.
    [10]
    10. Automatic door comprising a device according to any one of claims 1 to 9.
    9
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    同族专利:
    公开号 | 公开日
    ES2649060B1|2018-06-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4365188A|1979-08-24|1982-12-21|Erwin Sick Gmbh Optik-Elektronik|Circuit arrangement for monitoring and controlling closing and opening movements|
    ES2036288T3|1988-03-24|1993-05-16|Robert Bosch Gmbh|PROCEDURE TO OPERATE AN ENTRAPMENT PROTECTION SENSOR.|
    US20040172879A1|2003-03-07|2004-09-09|Metzeler Automotive Profile Systems Gmbh|Device for detecting an obstacle in the opening range of a movable closure element|
    WO2011038514A1|2009-10-02|2011-04-07|Magna Closures Inc.|Vehicular anti-pinch system with rain compensation|
    US8769878B1|2010-08-06|2014-07-08|Miller Edge, Inc.|Photo eye to switch sensing edge control conversion system|
    US20130321006A1|2011-02-08|2013-12-05|Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt|Method for measuring capacitance and capacitive sensor unit|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201630924A|ES2649060B1|2016-07-07|2016-07-07|SECURITY BAND DEVICE FOR AUTOMATIC DOOR|ES201630924A| ES2649060B1|2016-07-07|2016-07-07|SECURITY BAND DEVICE FOR AUTOMATIC DOOR|
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