EP1915499A1 - Einklemmsensor - Google Patents
EinklemmsensorInfo
- Publication number
- EP1915499A1 EP1915499A1 EP06762313A EP06762313A EP1915499A1 EP 1915499 A1 EP1915499 A1 EP 1915499A1 EP 06762313 A EP06762313 A EP 06762313A EP 06762313 A EP06762313 A EP 06762313A EP 1915499 A1 EP1915499 A1 EP 1915499A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrode
- sensor
- shielding
- einklemmsensor
- capacitance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/40—Safety devices, e.g. detection of obstructions or end positions
- E05F15/42—Detection using safety edges
- E05F15/46—Detection using safety edges responsive to changes in electrical capacitance
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
- E05Y2900/53—Application of doors, windows, wings or fittings thereof for vehicles characterised by the type of wing
- E05Y2900/55—Windows
Definitions
- the invention relates to an anti-pinch sensor, in particular for detecting an obstacle in the path of an actuating element of a motor vehicle, having a positionable via a signal line to a measuring potential, opposite a counter electrode positionable electrode and an evaluation circuit for detecting the capacitance between the electrode and counter electrode.
- an electric field is generated between the electrode and the counter electrode. If a dielectric or generally an object with a relative dielectric constant ⁇ r of greater than 1 enters this field, the capacitance formed by the electrode and the counterelectrode thereby changes. Therefore, if the capacitance between the electrode and the counterelectrode is measured by means of a suitable evaluation circuit, then an obstacle located in the path of an actuating element of a motor vehicle can be detected and appropriate countermeasures taken.
- a pinch sensor of the type mentioned is particularly suitable for
- Detecting obstacles in closing elements of a motor vehicle such. an electrically operable window, an electrically operated sliding door or an electrically operable tailgate. Also, such a pinch sensor can be used for the detection of obstacles in the case of an electrically actuated seat.
- a sensor of the type mentioned is known for example from DE 102 20 725 C1.
- the shielding electrode fulfills the purpose of reducing the influence of the movable actuating element on the capacitive measuring signal.
- the shielding electrode is electrically insulated and has an existing of an electrically conductive material guide surface. As a result, the electric field generated by the electrode does not penetrate beyond the shield electrode, so that an actuating element moving beyond the screening electrode can not influence the capacity of the arrangement.
- the anti-pinch sensor must be integrated in a complex manner in the vehicle.
- an embedding of the shielding electrode in the sealing element sealing the seal is described.
- the object of the invention is to provide an easy to be integrated in a vehicle pinch sensor, which also has a high detection sensitivity.
- This object is achieved for a pinch sensor of the type mentioned in the present invention in that the electrode is divided into a plurality of separate electrodes, each having a separate supply line for connection to the measuring potential.
- the invention initially proceeds in a first step from the consideration that, as a rule, the change in capacitance caused by a foreign body penetrating into the path of an actuating element is small. However, such a change in the capacitance can be detected the better, the smaller the overall capacitance between the electrode and the counter electrode is.
- the invention recognizes that the capacitance forming between the electrode and the counter-electrode can be reduced by using an electrode which is subdivided into a plurality of individual electrodes. As a result, the capacity formed with the counter electrode is reduced. This is due to the fact that the entire surface of the electrode is divided into several interrupted individual areas of the individual electrodes, which reduces the capacity accordingly.
- a pinch sensor configured in this way allows the detection of a change in capacitance by means of a multiplex method.
- the individual electrodes can be controlled by means of the separate supply lines either offset in time (serial) or simultaneously (in parallel).
- the first serial taxation has the advantage that in this case only a single evaluation circuit for capacity change is necessary. However, the time constant must be observed until all electrodes have been switched through one after the other.
- the second parallel drive does not have the disadvantageous time delay, it does require a number of evaluation electronics for evaluation, which increases costs.
- the electrode (17) extends in a longitudinal direction and is divided along the longitudinal direction into the plurality of separate electrodes (35). This makes it possible to guide the pinch sensor along a Einklemm Kunststoffes. In this way, in the case of a serial control of the individual electrodes, detection of parameters of an obstacle located in the path of the actuating element, such as, for example, its size or position, is made possible.
- the electrode is guided in a flexible carrier.
- a flexible carrier allows an adaptation of the anti-pinch sensor to the given contours of a motor vehicle.
- a shielding electrode is provided, and the electrode and the shielding electrode are arranged substantially opposite one another and insulated from one another. If such a shielding electrode is inserted between the electrode and the counterelectrode, then the electric field forming between the electrode and the shielding electrode can be reduced. On the other hand, a high capacitance is created between the shielding electrode and the counterelectrode. In this case, the uncovered edge regions of the electrode and the counterelectrode continue to form a capacitance which, however, is significantly reduced due to the drastically reduced effective area of the electrode by the shielding electrode. In addition, this configuration forms an electric field between the electrode and the counter electrode, which is directed far into the room.
- the shielding electrode is arranged substantially opposite the electrode in the pinching sensor.
- the pinch sensor can be easily integrated into a motor vehicle, in It is arranged opposite the body of the motor vehicle such that the shield electrode lies between the electrode and the body.
- the shielding sensor can be guided along arbitrary contours of the motor vehicle, without this necessitating an adaptation in the embodiment of the pinching sensor itself.
- the shielding electrode is expediently subdivided into electrically contacted individual electrodes, between which the separate supply lines are arranged in an insulated manner. This reliably prevents between the supply lines and the
- Counter electrode is formed a capacity. Each supply line is shielded in this way against the counter electrode.
- a switching means for potential equalization between the electrode and the shield electrode is further provided. This ensures that no electric field between the electrode and the shielding electrode is formed. Accordingly, capacitance formed by the electrode and counter electrode further decreases.
- an amplifier is expediently provided, which is connected on the output side to the shielding electrode for supply with a signal derived from the signal line. This achieves in a simple manner that the shielding electrode is always at the same potential as the electrode. A change in capacitance due to potential fluctuations between the electrode and the shielding electrode is thereby reliably avoided. It is particularly advantageous here to control the shielding electrode low resistance.
- a ribbon cable or a round cable is used as the carrier for the electrode and the shielding electrode.
- Such cables in particular multicore executed, are inexpensive and qugestaltig available.
- the lines present in such cables are used both as signal lines and as electrodes and counterelectrodes.
- a flexible printed circuit board is used as the carrier of the electrode and the shielding electrode.
- the electrode and the shielding electrode as well as the supply lines or signal lines required for this purpose are each embodied as strip conductors in a multi-layer printed circuit board.
- the printed circuit board material itself is a flexible plastic.
- the flexible printed circuit board can be formed relatively flat, whereby it can be easily guided along contours of a motor vehicle.
- the anti-pinch sensor can be used in a simple manner for detecting an obstacle in the path of an actuating element of a motor vehicle, when the earthed body of the motor vehicle serves as a counter electrode.
- the described pinch sensor is guided along contours of the motor vehicle such that the shielding electrode comes to rest between the body and the electrode.
- the evaluation circuit detects the capacitance formed between the electrode and the grounded body.
- FIG. 1 is a schematic side view of a motor vehicle
- Fig. 3 in a plan view of the pinch sensor of FIG. 2 and
- Fig. 4 in a cross section realized by a round cable pinch sensor.
- Fig. 1 shows schematically a side view of a motor vehicle 1, of which the hood 2, the roof 3 and the windshield 4 are visible. Further, a front door 5 and a rear door 6 are shown.
- the front door 5 has an electrically driven disk 9 as an adjusting element 7.
- a pinching sensor 10 is provided along the front and upper inner contour of the door 5, which is designed as a ribbon cable 11.
- the flat cable 11 are - not shown here - several separate electrodes having separate leads for driving.
- a shielding electrode is further arranged in the flat cable 11.
- the body of the motor vehicle 1 serves as a counter electrode.
- FIG. 2 is shown in FIG. 2, which is configured by a flexible printed circuit board 14 having a plurality of layers.
- the lower layer of the flexible printed circuit board 14 is formed by a shielding electrode 16 designed as a planar printed conductor. Your opposite is in the uppermost layer of the circuit board 14 as an electrode 17 further arranged a flat conductor track. This is - not visible here - divided several times in the longitudinal direction of the printed circuit board 14. Below the electrode 17 is again as a planar
- Conductor serving a shield serving individual electrode 18 which is electrically conductively connected to the shield electrode 16.
- more shielding individual electrodes 20 and electrical leads 23 are now alternately arranged, which serve to contact the individual electrodes formed by dividing the electrode 17. This is clearly visible in the illustrated section, wherein the centrally arranged electrical supply line 23 via the via 21 with the electrode 17 arranged above it electrically is contacted.
- the individual electrode 18 has a breakthrough at the corresponding point. All printed conductors shown are each isolated from each other by the insulating material 24 of the printed circuit board 14.
- the pinching sensor 13 is placed on a grounded counter electrode 25, which may be formed, for example, by the body of a motor vehicle.
- the electrode 17 is acted upon by an alternating voltage by means of the signal line 26, the corresponding supply line 23 and the via 21.
- the alternating voltage is generated here by a signal generator 28 with respect to the ground potential.
- the individual electrodes 18, 20 serving for the shielding and the shielding electrode 16 are subjected to an alternating voltage, which is derived from the alternating voltage fed to the electrode 17.
- a switching means 32 designed as an operational amplifier is inserted between the signal line 26 and the connecting line 30. In this way, it is ensured that the shielding electrodes 18 and 20 and the shielding electrode 16 are at the same potential without delay as the electrode 17.
- an evaluation circuit 34 is arranged between the signal line 26 and the ground potential. This evaluation circuit 34 detects the ratio of capacitance change .DELTA.C to the capacitance C. Since the capacity C is low, a small capacitance change .DELTA.C can be detected. To detect the capacitance, either a measuring bridge can be used or the charging constant can be observed. Also prefabricated commercially available electronic modules can be used for this purpose.
- FIG. 3 shows the anti-pinch sensor 13 shown in cross-section in FIG. 2 in a plan view. It can be seen here the flexible printed circuit board 14, which can be easily guided along a contour of a motor vehicle. To clarify the structure, the insulation material is removed or not shown on the upper side of the pinching sensor 13. For this reason, the individual electrodes 35 interrupted in the longitudinal direction of the flexible circuit board 14 are clearly visible. Each of these individual electrodes 35 has a through-connection 21, which is connected to a separate supply line. In this way, a multiplex method can be used to evaluate the pinching sensor 13. With the signal generator 28 shown in FIG. 2 and the evaluation circuit 34 are successively staggered, the individual
- Electrodes 35 individually controlled and detected the capacity thus formed. Due to the reduced area of the individual electrodes 35 with respect to a continuous conductor track, the capacitance between the electrodes 35 and the counter electrode 25 is further reduced. This allows a further increase in detection sensitivity.
- a pinch sensor 36 is shown in a further alternative, which is configured in the form of a round cable 38.
- an electrode 17 and a shielding electrode 16 are arranged in the form of a half shell.
- the round cable 38 is arranged opposite a counter electrode 25 such that the
- Shielding electrode 16 between the electrode 17 and the counter electrode 25 is located.
- the electrode 17 is divided into a plurality of individual electrodes.
- a plurality of respectively insulated electrical supply lines 23 are present in the interior of the round cable 38. These leads 23 are each formed as insulated copper cable. Around the leads 23 around more insulated copper wires are used as the shield serving individual electrodes by means of an electrical connection 39 with the shield electrode 16 are connected. As shown, the individual electrodes are contacted via a plated-through hole 21 in each case with the corresponding electrical supply line 23.
- the mode of operation and the possibilities for detecting a capacitance change of the shielding sensor 36 caused by an obstacle are identical to the shielding sensor 13 shown in FIGS. 2 and 3.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202005012636U DE202005012636U1 (de) | 2005-08-11 | 2005-08-11 | Einklemmsensor |
PCT/EP2006/006380 WO2007017014A1 (de) | 2005-08-11 | 2006-06-30 | Einklemmsensor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1915499A1 true EP1915499A1 (de) | 2008-04-30 |
Family
ID=37198725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06762313A Withdrawn EP1915499A1 (de) | 2005-08-11 | 2006-06-30 | Einklemmsensor |
Country Status (4)
Country | Link |
---|---|
US (1) | US20100156440A1 (de) |
EP (1) | EP1915499A1 (de) |
DE (1) | DE202005012636U1 (de) |
WO (1) | WO2007017014A1 (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202007008440U1 (de) | 2007-06-16 | 2008-11-06 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt | Einklemmschutzvorrichtung |
US8720279B2 (en) * | 2009-05-18 | 2014-05-13 | Freescale Semiconductor, Inc. | Object detection device with variable sensitivity electric field measurement circuit |
JP5300640B2 (ja) * | 2009-07-27 | 2013-09-25 | 株式会社ジャパンディスプレイウェスト | 静電容量型入力装置および入力装置付き電気光学装置 |
US9234979B2 (en) | 2009-12-08 | 2016-01-12 | Magna Closures Inc. | Wide activation angle pinch sensor section |
US8493081B2 (en) | 2009-12-08 | 2013-07-23 | Magna Closures Inc. | Wide activation angle pinch sensor section and sensor hook-on attachment principle |
DE102011008275B4 (de) * | 2011-01-11 | 2016-02-18 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt | Sensoreinheit zum berührungslosen Betätigen einer Fahrzeugtür |
US8615927B2 (en) * | 2011-11-23 | 2013-12-31 | GM Global Technology Operations LLC | Noncontact obstacle detection system using RFID technology |
US10060172B2 (en) | 2015-08-21 | 2018-08-28 | Magna Closures Inc. | Variable resistance conductive rubber sensor and method of detecting an object/human touch therewith |
JP2017048614A (ja) * | 2015-09-02 | 2017-03-09 | 株式会社東海理化電機製作所 | 挟み込み検出用センサ及び開閉体制御装置 |
JP6556614B2 (ja) * | 2015-12-16 | 2019-08-07 | 株式会社東海理化電機製作所 | 車両用閉じ切り検出装置 |
US10087671B2 (en) | 2016-08-04 | 2018-10-02 | Ford Global Technologies, Llc | Powered driven door presenter for vehicle doors |
US10329823B2 (en) * | 2016-08-24 | 2019-06-25 | Ford Global Technologies, Llc | Anti-pinch control system for powered vehicle doors |
AT519601A1 (de) * | 2017-02-14 | 2018-08-15 | Liberda Viktor | Verfahren und vorrichtung zum steuern einer tür, vorzugsweise schiebetür |
DE102017215383A1 (de) * | 2017-09-01 | 2019-03-07 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg | Verfahren zum Betrieb eines Türmoduls eines Kraftfahrzeugs |
CN109683736A (zh) * | 2018-11-02 | 2019-04-26 | 北京奥特易电子科技有限责任公司 | 一种具有防夹和变色功能的车窗及包含该车窗的汽车 |
CN110242148A (zh) * | 2019-06-12 | 2019-09-17 | 上海安宇峰实业有限公司 | 汽车电动门系统及其开门方法 |
GB2589113B (en) | 2019-11-20 | 2021-11-17 | Kingsway Enterprises Uk Ltd | Pressure monitor |
GB202018613D0 (en) | 2020-11-26 | 2021-01-13 | Kingsway Enterprises Uk Ltd | Anti-ligature device |
EP4082812A1 (de) * | 2021-04-29 | 2022-11-02 | Inalfa Roof Systems Group B.V. | Einklemmerkennungssystem |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3781672A (en) * | 1971-05-10 | 1973-12-25 | Drexelbrook Controls | Continuous condition measuring system |
DE3521004A1 (de) * | 1985-06-12 | 1986-12-18 | Robert Bosch Gmbh, 7000 Stuttgart | Steueranordnung fuer einen elektromotorischen antrieb |
CN1064754C (zh) * | 1998-12-18 | 2001-04-18 | 赵飙 | 改进型电容性位移传感器 |
US6369588B1 (en) * | 1999-11-09 | 2002-04-09 | Gerard E. Sleefe | Sensor system for web inspection |
EP1277907A3 (de) | 2001-03-28 | 2004-03-10 | Company for Technology Transfer and Patents (Sark-Kistner) | Berührungs- bzw. Einklemmschutz für alle maschinell bewegten Bauteile, im speziellen für automatische Schiebetüren |
JP2004534217A (ja) * | 2001-04-27 | 2004-11-11 | アトルア テクノロジーズ インコーポレイテッド | 改善されたキャパシタンス測定感度を持つ容量性のセンサシステム |
US6781388B2 (en) * | 2001-09-26 | 2004-08-24 | Delphi Technologies, Inc. | Liquid property sensor |
DE10220725C1 (de) * | 2002-05-07 | 2003-04-03 | Metzeler Automotive Profile | Vorrichtung zum Erkennen eines Hindernisses in dem Öffnungsbereich eines bewegbaren Schließelements eines Kraftfahrzeugs |
DE20221517U1 (de) * | 2002-05-07 | 2006-03-16 | Metzeler Automotive Profile Systems Gmbh | Vorrichtung zum Erkennen eines Hindernisses in dem Öffnungsbereich eines bewegbaren Schließelements eines Kraftfahrzeugs |
WO2004059343A1 (ja) * | 2002-12-25 | 2004-07-15 | Act Elsi Inc. | 静電容量検出型近接センサ |
DE10336335B4 (de) * | 2003-08-08 | 2015-03-12 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Schließvorrichtung für Fahrzeuge |
DE102004023285B3 (de) * | 2004-05-11 | 2005-07-07 | Metzeler Automotive Profile Systems Gmbh | Vorrichtung zum Steuern und Überwachen eines bewegbaren Schliesselements, insbesondere einer motorisch angetriebenen Fensterscheibe, Heckklappe oder Schiebetür eines Kraftfahrzeugs |
TWI280383B (en) * | 2004-06-29 | 2007-05-01 | Japan Ae Power Systems Corp | Partial discharge detecting sensor, and detecting device, and gas insulated electric apparatus provided with a partial discharge detecting sensor |
DE102004052056B4 (de) * | 2004-10-26 | 2012-02-02 | Sick Ag | Sicherheitsschalteranordnung |
US7679376B2 (en) * | 2007-01-19 | 2010-03-16 | Korea Institute Of Science And Technology | Capacitive sensor for sensing tactile and proximity, and a sensing system using the same |
-
2005
- 2005-08-11 DE DE202005012636U patent/DE202005012636U1/de not_active Expired - Lifetime
-
2006
- 2006-06-30 EP EP06762313A patent/EP1915499A1/de not_active Withdrawn
- 2006-06-30 US US12/063,427 patent/US20100156440A1/en not_active Abandoned
- 2006-06-30 WO PCT/EP2006/006380 patent/WO2007017014A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007017014A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2007017014A1 (de) | 2007-02-15 |
DE202005012636U1 (de) | 2006-12-28 |
US20100156440A1 (en) | 2010-06-24 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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Effective date: 20080311 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: WUERSTLEIN, HOLGER Inventor name: WEINGAERTNER, THOMAS Inventor name: KUHNEN, THORSTEN |
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17Q | First examination report despatched |
Effective date: 20110225 |
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DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20140103 |