CN202094819U - Piezoelectric self-powered device for automobile tire pressure monitoring system - Google Patents
Piezoelectric self-powered device for automobile tire pressure monitoring system Download PDFInfo
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- CN202094819U CN202094819U CN2011201599939U CN201120159993U CN202094819U CN 202094819 U CN202094819 U CN 202094819U CN 2011201599939 U CN2011201599939 U CN 2011201599939U CN 201120159993 U CN201120159993 U CN 201120159993U CN 202094819 U CN202094819 U CN 202094819U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 206010020852 Hypertonia Diseases 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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Abstract
The utility model relates to a piezoelectric self-powered device for an automobile tire pressure monitoring system, belonging to the field of automobile electronic application. The piezoelectric self-powered device is fixedly connected with a wheel hub. One or more piezoelectric oscillators adopted for the piezoelectric self-powered device are shaped as cantilevers, a cantilever plane of the piezoelectric oscillator is parallel with a wheel shaft and is vertical to a rolling direction of the wheel. Advantages of the device are that usage inconvenience caused by cell replacing and safety hidden trouble caused by electricity running out of the cell are avoided. Because the device can transform mechanical energy of the motion of the automobile into electric energy, so energy saving circuits and energy saving devices are not needed, and manufacturing cost of the automobile tire pressure monitoring system is substantially reduced.
Description
Technical field
The utility model belongs to the automotive electronics application, is specifically related to a kind of automobile tire pressure monitoring system piezoelectric self-powersupply device.
Background technology
Automobile tire pressure monitoring system (Remote tire pressure monitoring system, abbreviation TPMS) major function is that air pressure of automobile tire is monitored in real time, hypertonia, under-voltage and gas leakage are reported to the police, with prevention owing to doughnut explosion or the under-voltage traffic accident that causes, avoid under-voltage oil consumption increase that causes and tire wear to aggravate.The TPMS system mainly constitutes by being installed in the monitor in the driver's cabin and being installed in each detection reflector of taking turns tyre cavity.Existing detection reflector comprises: intelligence sensor, single-chip microcomputer (MCU), RF transmitting chip, battery, the antenna of collection pressure, temperature, acceleration and voltage detecting and back signal processing, its function is to detect the tire internal pressure to launch with temperature signal and with it, and monitor receives the signal that detects the reflector emission and shows and warning.At present, about the technology of signals collecting, emission and reception is quite ripe, the greatest problem of TPMS systems face is battery short a, unstable properties affected by environment in useful life, the formed potential safety hazard of can't reporting to the police when also existing the energy content of battery to exhaust.In addition, the existence of battery is difficult to reduce the weight of reflector.
Chinese patent application " self-power supply device that is used for automobile tire pressure monitoring system ", number of patent application 200510016838.0 provide a kind of self-power supply device, this patent comprises the piezoelectric vibrator that at least two mounting planes are not parallel to each other, and makes the mounting plane at one of them described piezoelectric vibrator place parallel with certain section of wheel rim.The piezoelectric vibrator of An Zhuaning is in real work like this, and generating that can not be stable does not have using value.
Summary of the invention
The utility model provides a kind of automobile tire pressure monitoring system piezoelectric self-powersupply device, lacks or arrange because of piezoelectric vibrator the problem of improper cisco unity malfunction useful life to solve battery.
The technical scheme that the utility model is taked is, the piezoelectric self-powersupply device is fixedlyed connected with wheel hub, the piezoelectric vibrator that this piezoelectric self-powersupply device adopts is that the cantilever plane of cantilever design and piezoelectric vibrator had not only paralleled with wheel shaft but also perpendicular with the wheel rolling direction, and the piezoelectric vibrator number is one or more.
Piezoelectric self-powersupply device of the present utility model is made of piezoelectric vibrator, printed circuit board (PCB) and the power management control circuit of being made up of other electronic device on described printed circuit board (PCB) that mechanical energy converts electric energy to one or more, described piezoelectric vibrator by elastic base plate, stick on the piezoelectric ceramic piece on the substrate and be fixed in substrate one free-ended lumped mass piece and constitute, described piezoelectric vibrator one end is fixed on the housing, and it is spacing that another free end utilizes stopping means to carry out; When piezoelectric ceramic piece is all pasted in the substrate both sides, connect by lead between two potsherds; When piezoelectric vibrator is two and when above, each piezoelectric vibrator links to each other with power circuit on the printed circuit board (PCB) by lead respectively, described printed circuit board (PCB) and power management control circuit thereof are fixed on the housing by connector, the pulse voltage of handling through rectification, energy accumulation flows to the detection reflector by lead, and described lead is drawn by the through hole on the housing.
Advantage of the present utility model is: can avoid changing use inconvenience and the battery power that battery brings and exhaust the potential safety hazard of being brought.Press the piezoelectric vibrator that the utility model is arranged, the vibration of wheel hub and velocity variations etc. make piezoelectric vibrator produce flexural deformation in the time of can utilizing vehicle ' to greatest extent thus, and then at the piezoelectric element two ends of described piezoelectric vibrator generation alternating voltage, described alternating current is exported to the detection reflector with the form of pulse electric energy on demand through further rectification and after flowing accumulation, drives its work.Because piezoelectric self-powersupply device of the present utility model can convert the mechanical energy in the motor racing to electric energy in real time, therefore do not need to design energy-saving circuit and use expensive energy saving device, this can significantly reduce the manufacturing cost of automobile tire pressure monitoring system.
Description of drawings
Fig. 1 is the structural representation of a preferred embodiment of the present utility model mounting means on wheel hub;
Fig. 2 is the structural representation of piezoelectric self-powersupply device of the present utility model;
Fig. 3 is the power management control circuit of the utility model embodiment, and 16 is comparator, and 17 is trigger.
Embodiment
The embodiment that provides below in conjunction with accompanying drawing describes in further detail the utility model structure and principle.
As shown in Figure 1, the piezoelectric self-powersupply device is fixedlyed connected with wheel hub 14, the piezoelectric vibrator 1 that this piezoelectric self-powersupply device adopts had not only paralleled with wheel shaft for the cantilever plane of cantilever design and piezoelectric vibrator but also is perpendicular with the wheel rolling direction, and the piezoelectric vibrator number is one or more.
As shown in Figure 2, piezoelectric self-powersupply device of the present utility model is by 2 piezoelectric vibrator 1 and piezoelectric vibrators 21 that mechanical energy converted to electric energy ', printed circuit board (PCB) 4 and the power management control circuit of being made up of other electronic device 3 on described printed circuit board (PCB) constitute.Described piezoelectric vibrator by elastic base plate 10, stick on the piezoelectric ceramic piece 9 on the substrate and be fixed in substrate one free-ended lumped mass piece 8 and constitute; Described piezoelectric vibrator one end is fixed on the housing 12, and it is spacing that another free end utilizes stopping means 7 to carry out; When piezoelectric ceramic piece 9 is all pasted in the substrate both sides, pass through lead 11 between two potsherds to connection; When piezoelectric vibrator is two and when above, each piezoelectric vibrator links to each other with power circuit 3 on the printed circuit board (PCB) 4 by lead 13 respectively.Described printed circuit board (PCB) 4 and power management control circuit thereof are fixed on the housing 12 by connector 2, and the pulse voltage of handling through rectification, energy accumulation flows to the detection reflector by lead 6, and described lead 6 is drawn by the through hole on the housing 12 5.As shown in Figure 1 and Figure 2, housing is closed piezoelectric vibrator, printed circuit board (PCB) and power circuit, and described housing 12 is fixed on the wheel hub 14 by lock ring button 15, and rotates with wheel hub.
When wheel jolts or during rotation speed change, the stiff end of described piezoelectric vibrator is subjected to incentive action changes the stress of lumped mass piece, direction in radially inertia force and tangential inertial force comprehensive function lower edge perpendicular to piezoelectric vibrator moves reciprocatingly in the both sides, equilbrium position of piezoelectric vibrator, and then mechanical energy is changed into electric energy.
As shown in Figure 3, described power circuit 3 comprises that rectification circuit module 310, voltage detection module 320, switch control module 330 and voltage output module 340 constitute, and its function is to provide the electric energy that satisfies its instructions for use for signals collecting, processing and transmitter unit.Two groups of full-wave rectifying circuits and storage capacitance 312 that described rectification circuit module is made of two rectifier bridges that link to each other with piezoelectric vibrator respectively 311 are formed, and its effect is that the alternating current with each piezoelectric vibrator output changes into direct current and is stored in the electric capacity.Described voltage detection module 320 is by relatively electrical equipment and peripheral components 321 and voltage stabilizing element 322 are formed, when the voltage of described electric capacity 312 is lower than the voltage reference value that circuit 321 sets, circuit 321 is output as 0, and the electric energy that piezoelectric vibrator produces continues accumulation on electric capacity 312; When the voltage of described electric capacity 312 reaches circuit 321 and sets voltage reference value, the stable voltage of circuit 321 outputs.Described ON-OFF control circuit 330 is made up of cmos switch 331 and electric energy buffer circuit 332, and its effect is the break-make that control store electric capacity 312 is connected with voltage output module 340, and its electric energy provides by 321.Described voltage output module 340 is made of a voltage stabilizing element 341 and a filter capacitor 342, when 321 output burning voltages drive cmos switches 331 work, and voltage output module and then export a pulse voltage.
Claims (2)
1. automobile tire pressure monitoring system piezoelectric self-powersupply device, it is characterized in that: the piezoelectric self-powersupply device is fixedlyed connected with wheel hub, the piezoelectric vibrator that this piezoelectric self-powersupply device adopts is that the cantilever plane of cantilever design and piezoelectric vibrator had not only paralleled with wheel shaft but also perpendicular with the wheel rolling direction, and the piezoelectric vibrator number is one or more.
2. a kind of automobile tire pressure monitoring system piezoelectric self-powersupply device according to claim 1, it is characterized in that: the piezoelectric self-powersupply device converts mechanical energy to the piezoelectric vibrator of electric energy by one or more, printed circuit board (PCB) and the power management control circuit of being made up of other electronic device on described printed circuit board (PCB) constitute, described piezoelectric vibrator is by elastic base plate, stick on the piezoelectric ceramic piece on the substrate and be fixed in substrate one free-ended lumped mass piece and constitute, described piezoelectric vibrator one end is fixed on the housing, and it is spacing that another free end utilizes stopping means to carry out; When piezoelectric ceramic piece is all pasted in the substrate both sides, connect by lead between two potsherds; When piezoelectric vibrator is two and when above, each piezoelectric vibrator links to each other with power circuit on the printed circuit board (PCB) by lead respectively, described printed circuit board (PCB) and power management control circuit thereof are fixed on the housing by connector, the pulse voltage of handling through rectification, energy accumulation flows to the detection reflector by lead, and described lead is drawn by the through hole on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201599939U CN202094819U (en) | 2011-05-19 | 2011-05-19 | Piezoelectric self-powered device for automobile tire pressure monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201599939U CN202094819U (en) | 2011-05-19 | 2011-05-19 | Piezoelectric self-powered device for automobile tire pressure monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN202094819U true CN202094819U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201599939U Expired - Fee Related CN202094819U (en) | 2011-05-19 | 2011-05-19 | Piezoelectric self-powered device for automobile tire pressure monitoring system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185522A (en) * | 2011-05-19 | 2011-09-14 | 常州志邦电子科技有限公司 | Piezoelectric self power supply device for automobile tyre pressure monitoring system |
| CN102983780A (en) * | 2012-11-12 | 2013-03-20 | 西安交通大学 | Tire vibration energy collecting device |
| CN103171377A (en) * | 2013-03-26 | 2013-06-26 | 奇瑞汽车股份有限公司 | Passive sensor for tire pressure monitoring system |
| CN103888021A (en) * | 2014-02-26 | 2014-06-25 | 浙江大学 | Energy acquisition system and method based on tyre valve |
| CN105577030A (en) * | 2016-03-21 | 2016-05-11 | 吉林大学 | Opening apparatus used for wheel energy harvesting apparatus |
-
2011
- 2011-05-19 CN CN2011201599939U patent/CN202094819U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102185522A (en) * | 2011-05-19 | 2011-09-14 | 常州志邦电子科技有限公司 | Piezoelectric self power supply device for automobile tyre pressure monitoring system |
| CN102983780A (en) * | 2012-11-12 | 2013-03-20 | 西安交通大学 | Tire vibration energy collecting device |
| CN103171377A (en) * | 2013-03-26 | 2013-06-26 | 奇瑞汽车股份有限公司 | Passive sensor for tire pressure monitoring system |
| CN103171377B (en) * | 2013-03-26 | 2016-06-01 | 奇瑞汽车股份有限公司 | A kind of passive sensing device for tire pressure monitoring system |
| CN103888021A (en) * | 2014-02-26 | 2014-06-25 | 浙江大学 | Energy acquisition system and method based on tyre valve |
| CN103888021B (en) * | 2014-02-26 | 2015-10-28 | 浙江大学 | Based on energy collecting system and the method for tyre valve |
| CN105577030A (en) * | 2016-03-21 | 2016-05-11 | 吉林大学 | Opening apparatus used for wheel energy harvesting apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20140519 |