CN1702952A - Self-powered set for automobile tire pressure monitoring system - Google Patents
Self-powered set for automobile tire pressure monitoring system Download PDFInfo
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- CN1702952A CN1702952A CN 200510016838 CN200510016838A CN1702952A CN 1702952 A CN1702952 A CN 1702952A CN 200510016838 CN200510016838 CN 200510016838 CN 200510016838 A CN200510016838 A CN 200510016838A CN 1702952 A CN1702952 A CN 1702952A
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Abstract
This invention relates to self-supplying electrical device used in automobile tire pressure monitoring system in automobile electronic application field, which comprises one piezoelectricity vibrator to convert mechanical energy into electricity with two ends connected to the shell and the vibrator is to convert the vibration and speed mechanic energy in the moving process and to provide impulse device to the signal collection process and irradiation device of the tire pressure monitoring system. The piezoelectricity vibrator is connected to the power circuit with commute current and energy function.
Description
Technical field
The invention belongs to the automotive electronics application, be specifically related to a kind of self-power supply device that is used for automobile tire pressure monitoring system.
Background technology
System for monitoring pressure in tyre (Remote tire pressure monitoring system, abbreviation TPMS) major function is to monitor the driving vehicle tire pressure automatically, to hypertonia, gas leakage and under-voltage the warning, with prevention owing to the traffic accident of doughnut explosion or under-voltage initiation, avoid under-voltage oil consumption increase that causes and tire wear aggravation.The TPMS system is mainly by " monitor " that be installed in driver's cabin be installed in each detection transmitter module of taking turns tyre cavity and constitute.Existing detection emission comprises: device, RF radio-frequency transmissions chip, battery and antenna with pressure, temperature signal collection and processing, its function is to detect the tire internal pressure to launch with temperature signal and with it, and monitor then receives the signal that detects the emitter emission and shows and warning.At present, about signals collecting, emission and the technology that receives are mature on the whole, the greatest problem that faces is battery-powered and problem such as periodic replacement, making and use cost height, reliability that bring be low.
Summary of the invention
The invention provides a kind of self-power supply device that is used for automobile tire pressure monitoring system, with exist battery-powered of the self-power supply device that solves present automobile tire pressure monitoring system and problem such as periodic replacement, making and use cost height, reliability that bring be low.The technical scheme that the present invention takes is: comprise the piezoelectric vibrator of fixedlying connected with housing in two ends that mechanical energy is converted to electric energy, the effect of this piezoelectric vibrator is to convert mechanical energy such as vibration in the car running process and velocity variations to electric energy, for the signal acquisition process and the emitter of system for monitoring pressure in tyre provides pulse energy, this piezoelectric vibrator is connected with the power circuit lead with rectification and energy accumulation function.
In an embodiment of the invention, comprise the piezoelectric vibrator that at least two mounting planes are not parallel to each other, and make the mounting plane at one of them described piezoelectric vibrator place parallel with certain section of wheel rim.
In yet another embodiment of the present invention, the structure of described piezoelectric vibrator is to paste piezoelectric ceramic piece on the elastic base plate, and the lumped mass piece is fixedly connected on the middle part of this elastic base plate.
In an embodiment of the invention, described power circuit is made of rectification circuit module, voltage detection module and voltage output module three parts, and comprise rectifier bridge identical with piezoelectric vibrator quantity, that be connected in parallel to each other in the rectification circuit module, the rectifier bridge effect of this rectification circuit module is piezoelectric vibrator to be produced alternating current convert direct current to and accumulate on electric capacity, when capacitance voltage reaches the reference voltage level that sets, the comparator of voltage detection module puts 1, the voltage output module is started working, voltage pulse output.
Self-power supply device of the present invention, be to rely on the vibration of driving vehicle wheel hub and velocity variations equal excitation piezoelectric vibrator to make it produce flexural deformation, and then at the piezoelectric element two ends of described piezoelectric vibrator generation alternating voltage, described alternating current is exported to signal acquisition process and emitter through further rectification and after flowing accumulation with the form of pulse energy.
The invention has the advantages that: can avoid changing that use inconvenience that battery brings and electric energy exhaust replacing in time and the problem of can't reporting to the police brought; The environmental pollution that quadratic cost in can avoiding using and a large amount of old and useless battery are caused.Because self-power supply device of the present invention can convert the mechanical energy in the motor racing to electric energy in real time, therefore, also can reduce the system for monitoring pressure in tyre manufacturing cost significantly without any need for energy-saving circuit and expensive energy saving device.
Description of drawings
Fig. 1, be the structural profile schematic diagram of a preferred embodiment of the present invention;
Fig. 2, be the structural profile schematic diagram of a preferred embodiment of the present invention mounting means on wheel hub;
Fig. 3, be the power circuit diagram of the embodiment of the invention.
Embodiment
As shown in Figure 1, self-power supply device of the present invention is by two piezoelectric vibrator 1, piezoelectric vibrators 21 that mechanical energy converted to electric energy ' and the printed circuit board (PCB) 3 that mainly is loaded with power circuit 4 constitute.Described piezoelectric vibrator 1 is made of elastic base plate 13, the lumped mass piece 15 that sticks on the piezoelectric ceramic piece 14 on the substrate and be fixed in substrate middle part.The elastic base plate two ends of described piezoelectric vibrator 1 are fixed on the housing 5, the described piezoelectric ceramic piece 14 of substrate homonymy that sticks on is by lead 16 series connection, again by lead 12 and two that stick on elastic base plate opposite side piezoelectric ceramic piece parallel connections of connecting, piezoelectric vibrator 21 ' structure with above-mentioned piezoelectric vibrator one 1 connected modes, these two piezoelectric vibrators link to each other with power circuit 4 on the printed circuit board (PCB) 3 by lead 11 respectively.Adopt that the series connection of a plurality of piezoelectric ceramic pieces can improve output current, a plurality of piezoelectric ceramic piece parallel connection can improve voltage.Described printed circuit board (PCB) and power circuit thereof are fixed on the connector 2, and the pulse voltage of handling through rectification, energy accumulation flows to signal acquisition process and emitter by lead 6, and described lead 6 is drawn by the through hole on the housing 58.As shown in Figure 1 and Figure 2, housing 5 is fixed on the described connector 2, and described housing and connector are closed piezoelectric vibrator, printed circuit board (PCB) and power circuit.Described connector 2 is fixed on the wheel hub 7, and rotates with wheel hub.
As shown in Figure 1 and Figure 2, described two piezoelectric vibrators are installed in two orthogonal planes, and the mounting plane at a described piezoelectric vibrator place is parallel with some sections of wheel rim.When wheel jolts or during rotation speed change, the stress of the lumped mass piece on the described piezoelectric vibrator changes, its radially inertia force change and will make the piezoelectric vibrator parallel produce radially flexural deformation, tangential inertial force to change will make and produce tangential flexural deformation with the vertically arranged piezoelectric vibrator in wheel rim section with the wheel rim section, and then mechanical energy is changed into electric energy.
As shown in Figure 3, described power circuit 4 comprises rectification circuit module 410, voltage detection module 420 and voltage output module 430, and its function is to provide the pulse electric energy that satisfies instructions for use for signal acquisition process and transmitter unit.Two groups of full-wave rectifying circuits and electric capacity 412 that described rectification circuit module is made of two rectifier bridges that link to each other with piezoelectric vibrator respectively 411 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 420 is by comparing electrical equipment 421 and forming for this module provides the original paper 422 of voltage reference value.Described voltage output module 430 by a trigger 431, power amplification circuit 432, filter circuit 433, comparison circuit 434, one with circuit 435, for comparison circuit provides the element 436 and 437 of current reference value, and constitute for comparison circuit provides the element 438 of voltage reference value.When the voltage of described electric capacity 412 was lower than the voltage reference value that element 422 sets, comparator 421 was output as 0, output module 430 is not worked, and the electric energy that piezoelectric vibrator produces continues accumulation on electric capacity 412; When the voltage of described electric capacity 412 reached element 422 and sets voltage reference value, comparator 421 was output as 1, trigger 431 puts 1, output module 430 is started working, and then exported a pulse voltage.
Claims (4)
1, a kind of self-power supply device that is used for automobile tire pressure monitoring system, it is characterized in that, comprise the piezoelectric vibrator of fixedlying connected with housing in two ends that mechanical energy is converted to electric energy, the effect of this piezoelectric vibrator is to convert mechanical energy such as vibration in the car running process and velocity variations to electric energy, for the signal acquisition process and the emitter of system for monitoring pressure in tyre provides pulse energy, this piezoelectric vibrator is connected with the power circuit lead with rectification and energy accumulation function.
2, the self-power supply device that is used for automobile tire pressure monitoring system according to claim 1, it is characterized in that: comprise the piezoelectric vibrator that at least two mounting planes are not parallel to each other, and make the mounting plane at one of them described piezoelectric vibrator place parallel with certain section of wheel rim.
3, the self-power supply device that is used for automobile tire pressure monitoring system according to claim 1 and 2 is characterized in that: the structure of described piezoelectric vibrator is to paste piezoelectric ceramic piece on the elastic base plate, and the lumped mass piece is fixedly connected on the middle part of this elastic base plate.
4, according to claim 1 or 2 described be used for automobile tire pressure monitoring system self-power supply device, it is characterized in that: described power circuit is by the rectification circuit module, voltage detection module and voltage output module three parts constitute, and comprise identical in the rectification circuit module with piezoelectric vibrator quantity, the rectifier bridge that is connected in parallel to each other, the rectifier bridge effect of this rectification circuit module is piezoelectric vibrator to be produced alternating current convert direct current to and accumulate on electric capacity, when capacitance voltage reaches the reference voltage level that sets, the comparator of voltage detection module puts 1, the voltage output module is started working, voltage pulse output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510016838 CN1702952A (en) | 2005-06-01 | 2005-06-01 | Self-powered set for automobile tire pressure monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510016838 CN1702952A (en) | 2005-06-01 | 2005-06-01 | Self-powered set for automobile tire pressure monitoring system |
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| Publication Number | Publication Date |
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| CN1702952A true CN1702952A (en) | 2005-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510016838 Pending CN1702952A (en) | 2005-06-01 | 2005-06-01 | Self-powered set for automobile tire pressure monitoring system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7936109B1 (en) | 2010-03-31 | 2011-05-03 | Hong Kong Applied Science And Technology Research Institute Co. Ltd. | Non-resonant energy harvesting devices and methods |
| 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 |
| CN101371430B (en) * | 2005-12-12 | 2012-06-13 | 伯塔·里克特 | Piezoelectric motor to be used as a vehicle drive system, actuator, and similar |
| CN104617816A (en) * | 2015-03-01 | 2015-05-13 | 吉林大学 | Conveniently mounted wheel vibrating energy capturing device |
| CN104786754A (en) * | 2014-01-22 | 2015-07-22 | 纳米新能源（唐山）有限责任公司 | self-powered tire pressure monitoring system |
| CN108718160A (en) * | 2018-05-30 | 2018-10-30 | 新奥泛能网络科技有限公司 | Piezoelectric transducer based on mechanical oscillation and method |
| CN109318661A (en) * | 2018-10-22 | 2019-02-12 | 山东大学 | A kind of tire pressure monitoring sensor and its monitoring method of energy self power generation |
-
2005
- 2005-06-01 CN CN 200510016838 patent/CN1702952A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101371430B (en) * | 2005-12-12 | 2012-06-13 | 伯塔·里克特 | Piezoelectric motor to be used as a vehicle drive system, actuator, and similar |
| US7936109B1 (en) | 2010-03-31 | 2011-05-03 | Hong Kong Applied Science And Technology Research Institute Co. Ltd. | Non-resonant energy harvesting devices and methods |
| CN102308468A (en) * | 2010-03-31 | 2012-01-04 | 香港应用科技研究院有限公司 | Non-resonant energy harvesting devices and methods |
| CN102308468B (en) * | 2010-03-31 | 2012-10-31 | 香港应用科技研究院有限公司 | Non-resonant energy harvesting devices and methods |
| 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 |
| CN104786754A (en) * | 2014-01-22 | 2015-07-22 | 纳米新能源（唐山）有限责任公司 | self-powered tire pressure monitoring system |
| CN104786754B (en) * | 2014-01-22 | 2017-06-30 | 纳米新能源（唐山）有限责任公司 | A kind of self-powered pressure of tire monitoring system |
| CN104617816A (en) * | 2015-03-01 | 2015-05-13 | 吉林大学 | Conveniently mounted wheel vibrating energy capturing device |
| CN108718160A (en) * | 2018-05-30 | 2018-10-30 | 新奥泛能网络科技有限公司 | Piezoelectric transducer based on mechanical oscillation and method |
| CN109318661A (en) * | 2018-10-22 | 2019-02-12 | 山东大学 | A kind of tire pressure monitoring sensor and its monitoring method of energy self power generation |
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