CN102798402B - Doorknob sensor - Google Patents
Doorknob sensor Download PDFInfo
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- CN102798402B CN102798402B CN201210294058.2A CN201210294058A CN102798402B CN 102798402 B CN102798402 B CN 102798402B CN 201210294058 A CN201210294058 A CN 201210294058A CN 102798402 B CN102798402 B CN 102798402B
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- piezoelectric element
- door handle
- conductive metal
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- metal sheet
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Abstract
The invention discloses a doorknob sensor. A groove located at a grabbing part of a doorknob body is internally provided with a piezoelectric element capable of generating voltage when being deformed by pressing; and the upper surface and the lower surface of the piezoelectric element are respectively provided with a conductive metal sheet connecting lead for leading out the voltage generated by the piezoelectric element when being deformed by pressing. When a doorknob of the doorknob sensor is grabbed, voltage which is generated by the upper surface and the lower surface of the piezoelectric element can be output by conductive metal sheets and then converted into a switching signal for a control system in a car to control locking and unlocking states of a car door through a circuit, thereby efficiently controlling the locking and unlocking of the car door. The doorknob sensor, disclosed by the invention, has the advantages of high sensing accuracy, good interference resistance and extremely low power consumption.
Description
Technical field
The present invention relates to automobile intelligent enter with start up system in be arranged on sensor construction on door handle.
Background technology
The intelligence of automobile enters with start up system, door handle needs arrange the sensor can responding to staff, and when there being people to pull door handle, sensor can perceive staff, and can output signal to the control system controlling door unlock and locking.
At present, automobile intelligent enters the sensor can responding to staff that the automobile door handle of system is arranged and mainly contains capacitance type sensor and electro-optical pickoff two kinds.
Capacitance type sensor, it carrys out work by the high-frequency current path utilizing the distributed capacitance between sheet metal and staff and formed.Flow through the size of high-frequency current between the two by detection, can perception staff whether close.Because staff is in the outside of door handle, thus its sheet metal must equally be opened to the outside world by image antenna, receive the high-frequency signal from outside, this makes its Anti-Jamming Technique be difficult to put to good use, when the frequency of undesired signal is close with the frequency of operation of sensor, electromagnetic interference (EMI) (EMI) is easily scurried into, and causes misoperation, there is potential safety hazard.In addition, car owner wear muffler operate time, because of the isolation of gloves, the distance of hand and door handle inner metal sheets can become far away, makes capacitance type sensor likely test leakage.
Electro-optical pickoff, then paste metallic mirror in the inner side of door handle, electro-optical pickoff is arranged on position relative with door handle on door, triggers by stopping light during people's grasped handlebar.But the photoelectric sensor that its car door is installed can give user with foreign body sensation, unsightly; And when being with white glove to operate, white glove likely can cause photoelectric sensor reactionless to the reflection of light, thus there is test leakage.
In addition, above-mentioned two kinds of sensors are all active detections, though staff near or when grasping door handle, the high frequency oscillator of capacitance type sensor and the optical signal transmitter of photoelectric sensor also must direct-opens, its current drain is comparatively large, battery-driven burden when having increased the weight of parking.
In addition, the Costco Wholesale of capacitance type sensor and electro-optical pickoff is also all higher, and it causes the cost of door handle induction installation also higher.
Summary of the invention
The present invention is intended to the shortcoming overcoming above-mentioned prior art, and provide a kind of stable and reliable for performance, test leakage can not occur, power consumption is extremely low, and the door handle sensor that cost is also lower.
Door handle sensor of the present invention, the grip zones of its door handle body is provided with groove, the piezoelectric element that can produce voltage when being pressed distortion in upper and lower surface is installed in groove, piezoelectric element and bottom portion of groove leave and press for piezoelectric element the gap be out of shape, the upper and lower surface of piezoelectric element arranges conductive metal sheet respectively, and each conductive metal sheet connects wire respectively and drawn by the voltage that piezoelectric element two ends produce because of compressive deformation.
Door handle sensor of the present invention, when door handle is grasped, be arranged on the piezoelectric element meeting compressive deformation of grip zones, produce voltage on the surface upper and lower two, the conductive metal sheet arranged by upper and lower surface is exported.The voltage exported is switching signal by circuit conversion, outputs in the control system controlling door unlock and locking in car, as the trigger pip of control system, thus controls unblock and the locking of car door.
Described door handle sensor, sense staff by the compressive deformation of piezoelectric element, sensing accuracy is high, test leakage can not occur; And can not by the interference of extraneous high-frequency signal, good in anti-interference performance.In addition, the detection of its sensor is passive type, and the energy of signal is pressed by staff and obtains, and need high frequency oscillator or photo-electric light requirement signal projector to obtain unlike condenser type, thus power consumption is extremely low, can not bring burden to accumulator when stopping.In addition, the structure of piezoelectric element is extremely simple, and cost is far below the cost of capacitor sensor and electro-optical pickoff, and thus the cost of induction installation is also corresponding lower.
Described piezoelectricity original paper can be piezoelectric ceramic piece, also can be piezoelectric membrane sheet, and other can produce the electronic component of voltage in upper and lower surface when being pressed distortion.
The conductive metal sheet that piezoelectric element upper and lower surface is arranged can be nickel sheet, copper sheet, silver strip or the excellent sheet metal of other electric conductivity.Conductive metal sheet can be bonding with piezoelectric element, also can direct plating on the surface of piezoelectric element.
Accompanying drawing explanation
The scheme of installation of Fig. 1 door handle sensor of the present invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the partial enlarged drawing of Fig. 2.
embodiment
A kind of door handle sensor, as shown in Figure 1, Figure 2, Fig. 3, the grip zones of door handle body 1 is provided with groove 2, piezoelectric ceramics 3 is arranged in groove, bottom portion of groove leaves the gap for piezoelectric element pressing distortion, its upper surface is pasted with copper sheet, and lower surface is silver coated, and copper sheet and silver layer are connected to wire and the voltage of piezoelectric ceramics upper and lower surface can be drawn.
The groove 2 that door handle body is arranged can be wide at the top and narrow at the bottom step-like, and the edge of piezoelectric element can directly be placed on the step 21 of top, and below step self-assembling formation becomes the gap 22 of row for piezoelectric element; It makes the easy for installation of piezoelectric element, and can ensure the size in the gap that below is left easily, can not bring the problem affecting sensitivity because assemblage gap is too small.
Described piezoelectric ceramics can be the various shapes such as circle, Fang Hang, strip, only need can when people's grasped compressive deformation, and produce certain voltage in upper and lower surface.The shape of piezoelectric ceramics is good with strip, and the piezoelectric ceramics of strip when using material less, can produce larger deflection, thus highly sensitive and cost is low.
Described piezoelectric ceramic piece also can adopt piezoelectric membrane sheet to substitute.
Claims (4)
1. a door handle sensor; it is characterized in that: the grip zones of door handle body is provided with groove; the piezoelectric element that can produce voltage when being pressed distortion in upper and lower surface is installed in groove; piezoelectric element and bottom portion of groove leave and press for piezoelectric element the gap be out of shape; the upper and lower surface of piezoelectric element arranges conductive metal sheet respectively, and each conductive metal sheet connects wire respectively and drawn by the voltage that piezoelectric element two ends produce because of compressive deformation; Described piezoelectric element is piezoelectric ceramic piece or piezoelectric membrane sheet; The groove that described door handle body is arranged is wide at the top and narrow at the bottom step-like, and the edge of piezoelectric element is directly placed on the step of top, and below step self-assembling formation becomes the gap of row for piezoelectric element.
2. put according to the door handle sensor described in claim 1, it is characterized in that: the conductive metal sheet that the upper and lower surface of piezoelectric element is arranged is copper sheet, silver strip or nickel sheet.
3. according to the door handle sensor described in claim 1, it is characterized in that: the conductive metal sheet that piezoelectric element upper surface is arranged is copper sheet, the conductive metal sheet that lower surface is arranged is silver coating.
4. according to the door handle sensor described in claim 1, it is characterized in that: described piezoelectric ceramics is strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210294058.2A CN102798402B (en) | 2012-08-17 | 2012-08-17 | Doorknob sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210294058.2A CN102798402B (en) | 2012-08-17 | 2012-08-17 | Doorknob sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102798402A CN102798402A (en) | 2012-11-28 |
| CN102798402B true CN102798402B (en) | 2015-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210294058.2A Active CN102798402B (en) | 2012-08-17 | 2012-08-17 | Doorknob sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN102798402B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453493B (en) * | 2014-12-26 | 2016-09-28 | 马瑞利汽车电子(广州)有限公司 | A kind of encapsulating structure of pressure sensitive door handle sensor |
| CN105403234A (en) * | 2015-12-08 | 2016-03-16 | 马瑞利汽车电子(广州)有限公司 | Piezoelectric door handle sensor structure |
| WO2018173429A1 (en) * | 2017-03-24 | 2018-09-27 | 株式会社村田製作所 | Grip detection sensor |
| DE102017216115A1 (en) * | 2017-09-12 | 2019-03-14 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Bamberg | Method for adjusting a side door of a motor vehicle and associated anti-pinch sensor |
| CN111405390B (en) * | 2020-03-02 | 2022-10-18 | 浙江依圆医疗科技有限公司 | Wireless passive transmitting device for detecting opening and closing states of door and window |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101218406A (en) * | 2005-07-04 | 2008-07-09 | 霍弗·霍斯贝克及弗斯特两合公司 | Handle device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005098016A (en) * | 2003-09-26 | 2005-04-14 | Matsushita Electric Ind Co Ltd | Door handle device and keyless entry device having this device |
| DE102004063009A1 (en) * | 2004-12-22 | 2006-07-13 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Device for actuating an electric locking system and / or a lock built into the door or flap or the like for vehicles |
| JP2008192671A (en) * | 2007-02-01 | 2008-08-21 | Matsushita Electric Ind Co Ltd | Piezoelectric element |
| DE102007044280A1 (en) * | 2007-09-17 | 2009-03-19 | Huf Hülsbeck & Fürst Gmbh & Co. Kg | Handle i.e. door handle, for keyless access control system of motor vehicle, has information unit provided with information element that is movable relative to housing, where element changes position depending on actual safety condition |
| CN202853629U (en) * | 2012-08-17 | 2013-04-03 | 马瑞利汽车电子(广州)有限公司 | Door handle sensor |
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2012
- 2012-08-17 CN CN201210294058.2A patent/CN102798402B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101218406A (en) * | 2005-07-04 | 2008-07-09 | 霍弗·霍斯贝克及弗斯特两合公司 | Handle device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2008-192671A 2008.08.21 * |
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| CN102798402A (en) | 2012-11-28 |
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