CN102983780A - Tire vibration energy collecting device - Google Patents
Tire vibration energy collecting device Download PDFInfo
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- CN102983780A CN102983780A CN2012104512207A CN201210451220A CN102983780A CN 102983780 A CN102983780 A CN 102983780A CN 2012104512207 A CN2012104512207 A CN 2012104512207A CN 201210451220 A CN201210451220 A CN 201210451220A CN 102983780 A CN102983780 A CN 102983780A
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Abstract
The invention discloses a tire vibration energy collecting device which comprises an energy collecting device, a processing circuit and energy storages, wherein the energy collecting device, the processing circuit and the energy storages are connected through guide wires. The energy collecting device comprises a plurality of cantilever beam structures. Each cantilever beam structure comprises a working cavity which is surrounded by an upper cover board and a lower base board. A cantilever beam which is connected with a lower base board is arranged in each working cavity. A piezoelectric material layer and a mass block are arranged on each cantilever beam. Bending of the cantilever beams is caused due to the fact that the tire surface contacts the road surface and deforms during rolling of the tire, reciprocating deformation of the cantilever beams is produced following the deformation of the tire, stress and deformation of the interior of piezoelectric material layer are caused due to the deformation of the cantilever beams, voltage signals are produced on the surface of the piezoelectric material layer, and the voltage signals are led out through guide wires. The processing circuit receives the voltage signals through the guide wires and stores the voltage signals in the energy storages after conducting a process on the voltage signals. The miniature cantilever beams which are manufactured by using of micro-electromechanical system (MEME) technology have the advantages of being small in size, light in weight and small in inertia, a vibration state of a tire body can be quickly responded to, and maximization of energy collection can be achieved.
Description
Technical field
The invention belongs to the energy gathering apparatus technical field, relate to a kind of tire vibration energy collecting device.
Background technology
Tire fault has become a key factor of automobile safety accident, especially for the vehicle at running on expressway.Statistics shows, in numerous traffic accidents, blows out in the Vehicle Driving Cycle and the accident that causes accounts for 20%; Accident on the highway has 46% to be to be broken down and caused by tire approximately, wherein blows out one and just accounts for 70% of accident total amount; Blow out above in the situation of 160Km/h in Vehicle Speed, driver and crew's the death rate then is 100%.This shows that the use state of tire must carry out real-time monitoring, with guarantee driving safety.The project of required monitoring comprises: the many kinds of parameters such as tire internal gas pressure, tyre surface temperature, side drift angle, frictional force, contact force, slip rate.Consider the service performance of tire, require monitoring device to move with wireless mode, namely transducer and receiver send monitoring result with wireless communication mode.
For the senser element of carrying out the monitoring task, then mainly adopt dual mode to realize: active formula and passive type.Active formula device all adopts the mode of subsidiary heavy-duty battery to solve energy problem, thereby to the work energy consumption of device with all propose very harsh requirement the useful life of battery, to guarantee the reliable and stable of system.Active formula system has energy dissipation and environmental pollution two aspect problems.Result of study shows, the standby consumption of active formula system accounts for more than 80% of all batteries energy, and 15% energy of only having an appointment is used for the work of monitoring sensor.Energy utilization efficiency is very low, and because battery volume and quality are larger, cause difficulty is installed.In addition, battery manufacture and the replacing of active formula system can bring serious environmental pollution, can not satisfy the needs of future development.
The implementation of passive type device has two kinds, and a kind of mode is utilized the electromagnetic coupled mode, by high-frequency signal transmit and receive to shift energy, realize the power supply to senser element.Another kind of mode then is to utilize the to external world realization of collecting of energy, namely by to external world collection and the conversion of mechanical energy, electric energy, heat energy, luminous energy, chemical energy of energy collecting device, supplies with the work capacity of senser element.Can find that by contrast the passive type system has overcome the major defect of active formula system basically, is more suitable for the monitoring and measuring application in tire condition.The electromagnetic coupled mode need to be carried out the energy transmission, usually works in the mode of intercepting, i.e. the pattern of question-response.The collection of energy mode then can adopt the mode that initiatively sends, and senser element sends monitoring result information according to certain communication format under the drive of self harvest energy.This mode has reduced direct energy supply module, implements easier.
Summary of the invention
The problem that the present invention solves is to provide a kind of tire vibration energy collecting device, this device can be with tire vibration collection of energy and the micro device that utilizes, the deformation vibration collection of energy of tire is converted into electric energy, and supply with other tyre monitor parts and use, have the advantages such as simple, easy for installation that realize.
The present invention is achieved through the following technical solutions:
A kind of tire vibration energy collecting device comprises the energy collecting device, treatment circuit and the energy storage device that connect by wire;
Energy collecting device comprises a plurality of cantilever beam structures; Cantilever beam structure comprises the working chamber that is surrounded by upper cover plate and lower shoe, is provided with the cantilever beam that is connected with lower shoe in the working chamber, and cantilever beam is provided with piezoelectric material layer and mass; Tyre surface and road surface juxtaposition metamorphose cause the cantilever deflection of beam in the tire rolling, cantilever beam is with squeegee action and produce reciprocal distortion, the distortion of cantilever beam causes piezoelectric inner generation stress and deformation, and produces voltage signal on its surface, by wire voltage signal is derived again;
Treatment circuit passes through wire receiver voltage signal, and to after its filtering of carrying out, the rectification processing, is stored in the energy storage device.
Each cantilever beam is of different sizes respectively and resonance frequency in described a plurality of cantilever beam structure, realizes respectively the collection of energy of different frequency section; A plurality of cantilever beams are used in combination, and realize the collection of energy in the wide vibration frequency range.
Described cantilever beam structure adopts fish bone well and complementary type to arrange;
Fish bone well adopts symmetrical expression to arrange that the cantilever beam that will have different resonant frequencies is arranged in respectively in two working chambers;
Complementary type also adopts symmetrical expression to arrange that the cantilever beam that will have different resonant frequencies is arranged in the working chamber.
This tire vibration energy collecting device adopts the MEMS micro fabrication to make.
Described piezoelectric is selected ZnO, SiO
2, LiNbO
3Or the PZT piezoelectric is made.
Described conductor material adopts Al.
Described energy storage device adopts the condenser type accumulator.
Energy supply is monitored to tire and is used with device in the described energy storage device.
Described tire monitoring comprises passive type transducer and wireless launcher with device.
Energy supply uses to passive type wireless senser power supply in the described energy storage device, and the passive type wireless senser utilizes the electric energy of accumulator supply to finish monitoring to tire condition, and monitoring result is sent to vehicle diagnosing system.
Compared with prior art, the present invention has following useful technique effect:
Tire vibration energy collecting device provided by the invention, utilize cantilever beam structure to obtain the tyre surface vibrational energy, then will catch Conversion of Energy by piezoelectric effect is the signal of telecommunication (the tyre surface vibrational energy is converted into electric energy), the signal of telecommunication enters electric energy accumulator after treatment, for taking in requisition for the load of power supply.Further for improving energy harvesting efficient, adopt the microcantilever beam of MEMS fabrication techniques, have the advantage that volume is little, quality is light, inertia is little, can respond fast the vibrational state of carcass, realize the maximization of collection of energy.
Tire vibration energy collecting device provided by the invention, the distortion of tire body and vibration cause the cantilever deflection of beam, and with squeegee action and produce reciprocal deformation process.The distortion of cantilever beam causes piezoelectric inner generation stress and deformation, and produces voltage signal on its surface.The amplitude of voltage signal and change frequency are with the distortion of beam, and namely the vibrational state of tire is relevant.In the time of near cantilever beam works in resonance frequency, the energy intensity of output is maximum, has the highest collection efficiency.And adopt many cantilever beam structures, and just have the characteristics of wide frequency domain and multifrequency resonance, realize the maximization of collection of energy and the high efficiency of Conversion of Energy.
Tire vibration energy collecting device provided by the invention has that volume is little, cost is low, easy for installation, characteristics that efficient is high, is equipped with necessary treatment circuit and energy storage module, can be used as the power supply device of passive type tire monitor sensor.The typical application such as tire monitoring passive wireless sensor power supply (being equipped with microprocessor and transmitting antenna), utilize the electric energy of accumulator supply to finish monitoring to tire condition (such as tire pressure, tire temperature, frictional force etc.), and monitoring result is sent to vehicle diagnosing system through microprocessor and antenna.Like this, in the situation of vehicle wheel rotation, but just the automatic acquisition energy is also for induction sensor for energy collecting device, and transducer is finished monitoring and sent the result, and vehicle diagnosing system guarantees vehicle driving safety according to monitoring result.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the schematic diagram of cantilever beam structure;
Fig. 3 is that fish bone well is arranged schematic diagram;
Fig. 4 is that complementary type is arranged schematic diagram.
Wherein, 1 is energy collecting device; 2 is treatment circuit; 3 is energy storage device; 4 is wire; 5 is piezoelectric material layer; 6 is upper cover plate; 7 is cantilever beam; 8 is lower shoe.
Embodiment
Energy gathering apparatus provided by the invention is mainly used in the partial vibration energy of tire tread is for recycling and reuse.Utilize cantilever beam structure to obtain the tyre surface vibrational energy, then will catch Conversion of Energy by piezoelectric effect is the signal of telecommunication (the tyre surface vibrational energy is converted into electric energy), and the signal of telecommunication enters electric energy accumulator after treatment, for taking in requisition for the load of power supply.The present invention is described in further detail below in conjunction with specific embodiment, and the explanation of the invention is not limited.
Referring to Fig. 1, Fig. 2, a kind of tire vibration energy collecting device comprises the energy collecting device 1, treatment circuit 2 and the energy storage device 3 that connect by wire 4;
Above-mentioned tire vibration energy collecting device is used for the partial vibration energy of tire tread is for recycling and reuse.In the rolling process of tire, tyre surface and road surface constantly come in contact and the disengaging effect; Simultaneously, the distortion of compression and elongation also occurs in sidewall under the car weight effect; In addition, add the cornering behavior of tire, three's acting in conjunction forms a kind of regular oscillation phenomenon at tyre surface.The factors such as the same pavement behavior of characteristic of vibration, tire characteristics, the speed of a motor vehicle are closely related.The existence of tyre surface vibration is the inevitable outcome of tire rolling, is the direct result that tire is grabbed the effects such as ground, distortion, damping.To collecting of tyre surface vibrational energy, and be used for the energy supply of tire monitor sensor part, have good energy-saving effect.
Cantilever beam structure need to have good operating characteristic as the key structure of energy harvesting in the described device, to improve energy harvesting efficient.Concrete employing MEMS fabrication techniques, the microcantilever beam of made has the advantage that volume is little, quality is light, inertia is little, can respond fast the vibrational state of carcass, realizes the maximization of collection of energy.
The course of work of cantilever beam energy collecting device is as follows: the distortion of tire and vibration cause the cantilever deflection of beam, and with squeegee action and produce reciprocal deformation process.The distortion of cantilever beam causes piezoelectric inner generation stress and deformation, and produces voltage signal on its surface.The amplitude of voltage signal and change frequency are with the distortion of beam, and namely the vibrational state of tire is relevant.
In the time of near cantilever beam works in resonance frequency, the energy intensity of output is maximum, has the highest collection efficiency.Therefore for the maximization of collection of energy and the high efficiency of Conversion of Energy, adopt many cantilever beam structures: each cantilever beam is of different sizes respectively and resonance frequency in a plurality of cantilever beam structures, realizes respectively the collection of energy of different frequency section; A plurality of cantilever beams are used in combination, and realize the collection of energy in the wide vibration frequency range, be implemented in can both be reliable and stable in the wide frequency ranges work.
Concrete, according to the tire tread vibration characteristics, the layout of cantilever beam can have various ways, and exemplary configurations has fish bone well and complementary type.Fish bone well adopts symmetrical expression to arrange, the beam that will have different resonant frequencies is arranged in respectively in two working chambers (as shown in Figure 3), and the distortion of each cantilever beam and performance influence each other less.Complementary type also adopts symmetrical expression to arrange, but in contrast, with the beam of different size different resonant frequencies, be arranged in a working chamber (as shown in Figure 4) according to the mode of complementary dimensioned, do not interconnect between each beam, but have the phase mutual interference on distortion and the service behaviour.Front a kind of mode has arrangement convenience, and processing request is simple, but bulk is larger; Rear a kind of mode processing request is higher, but bulk is little, meets the dimensional requirement of MEMS processing.
Referring to Fig. 2, cantilever beam structure comprises upper cover plate 6 and lower shoe 8, wherein be processed with the working chamber groove on the upper cover plate, be processed with simultaneously cantilever beam 7 and working chamber groove on the lower shoe 8, upper and lower cover plate alignment package gets up, form the working chamber of a sealing, this working chamber is the working space of cantilever beam.Simultaneously, need to process the mass of piezoelectric material layer and constant weight at cantilever beam 7,, and the wire 4 that is used for deriving voltage signal.Wherein the weight of mass, volume and position are determined according to the vibration frequency of the cantilever beam that sets.Mass is used for realizing that cantilever beam structure forms stable excited vibration state, guarantees the collection of energy maximization.
Piezoelectric on the concrete cantilever beam 7 can be selected ZnO, SiO
2, LiNbO
3, the piezoelectric such as PZT makes, conductor material adopts Al more.
The voltage signal of piezoelectric output on the cantilever beam, be the alternating signal of multi-frequency stack, its phase and magnitude alters a great deal, thereby need to carry out necessary processing and could store and use, only be stored in the energy storage device, just finish whole collection of energy process.When voltage signal processed circuit unit after wire is derived receives, need to carry out some row such as certain filtering, rectification to voltage signal and process, so that output signal satisfies the input requirements of energy accumulator.Energy accumulator adopts the condenser type accumulator, and takes necessary safety prevention measure, guarantees energy storage safety.
The collected electric energy of energy accumulator can directly outwards be supplied with from energy accumulator, such as being supplied to the tire monitoring to use (such as passive type transducer and wireless launcher etc.) with device.The typical application such as the passive wireless sensor power supply to the tire monitoring.Passive wireless sensor is equipped with microprocessor and transmitting antenna, utilize the electric energy of energy accumulator supply to finish monitoring to tire condition (such as tire pressure, tire temperature, frictional force etc.), and monitoring result is sent to vehicle diagnosing system through microprocessor and antenna.Like this, in the situation of vehicle wheel rotation, but just the automatic acquisition energy is also for induction sensor for energy collecting device, and transducer is finished monitoring and sent the result, and vehicle diagnosing system guarantees vehicle driving safety according to monitoring result.
Claims (10)
1. a tire vibration energy collecting device is characterized in that, comprises the energy collecting device (1), treatment circuit (2) and the energy storage device (3) that connect by wire (4);
Energy collecting device (1) comprises a plurality of cantilever beam structures; Cantilever beam structure comprises the working chamber that is surrounded by upper cover plate (6) and lower shoe (8), is provided with the cantilever beam (7) that is connected with lower shoe (8) in the working chamber, and cantilever beam (7) is provided with piezoelectric material layer and mass; Tyre surface and road surface juxtaposition metamorphose cause the bending of cantilever beam (7) in the tire rolling, cantilever beam (7) is with squeegee action and produce reciprocal distortion, the distortion of cantilever beam (7) causes piezoelectric inner generation stress and deformation, and at its surface generation voltage signal, by wire voltage signal is derived again;
Treatment circuit (2) passes through wire (4) receiver voltage signal, and to after its filtering of carrying out, the rectification processing, is stored in the energy storage device (3).
2. tire vibration energy collecting device as claimed in claim 1 is characterized in that, each cantilever beam is of different sizes respectively and resonance frequency in described a plurality of cantilever beam structures, realizes respectively the collection of energy of different frequency section; A plurality of cantilever beams are used in combination, and realize the collection of energy in the wide vibration frequency range.
3. tire vibration energy collecting device as claimed in claim 1 is characterized in that, described cantilever beam structure adopts fish bone well and complementary type to arrange;
Fish bone well adopts symmetrical expression to arrange that the cantilever beam that will have different resonant frequencies is arranged in respectively in two working chambers;
Complementary type also adopts symmetrical expression to arrange that the cantilever beam that will have different resonant frequencies is arranged in the working chamber.
4. tire vibration energy collecting device as claimed in claim 1 is characterized in that, this tire vibration energy collecting device adopts the MEMS micro fabrication to make.
5. tire vibration energy collecting device as claimed in claim 1 is characterized in that, described piezoelectric is selected ZnO, SiO
2, LiNbO
3Or the PZT piezoelectric is made.
6. tire vibration energy collecting device as claimed in claim 1 is characterized in that, described conductor material adopts Al.
7. tire vibration energy collecting device as claimed in claim 1 is characterized in that, described energy storage device adopts the condenser type accumulator.
8. tire vibration energy collecting device as claimed in claim 1 is characterized in that, energy supply is monitored to tire and used with device in the described energy storage device.
9. tire vibration energy collecting device as claimed in claim 8 is characterized in that, described tire monitoring comprises passive type transducer and wireless launcher with device.
10. tire vibration energy collecting device as claimed in claim 1, it is characterized in that, energy supply is to passive type wireless senser power supply use in the described energy storage device, the passive type wireless senser utilizes the electric energy of accumulator supply to finish monitoring to tire condition, and monitoring result is sent to vehicle diagnosing system.
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| CN2012104512207A CN102983780A (en) | 2012-11-12 | 2012-11-12 | Tire vibration energy collecting device |
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|---|---|---|---|
| CN2012104512207A CN102983780A (en) | 2012-11-12 | 2012-11-12 | Tire vibration energy collecting device |
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| CN102983780A true CN102983780A (en) | 2013-03-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106168486A (en) * | 2016-08-30 | 2016-11-30 | 温州华邦安全封条股份有限公司 | A kind of vehicle positioning system and localization method thereof |
| CN106385199A (en) * | 2016-10-12 | 2017-02-08 | 南京航空航天大学 | Wind-induced vibration energy collection device for power supply of tire pressure monitoring system |
| CN108512290A (en) * | 2018-04-20 | 2018-09-07 | 西南交通大学 | Integrated apparatus, sensor monitoring system and vehicle |
| JPWO2018142714A1 (en) * | 2017-01-31 | 2019-11-14 | パナソニックＩｐマネジメント株式会社 | Power generator |
| CN110635715A (en) * | 2019-09-29 | 2019-12-31 | 江苏大学 | Vehicle tire vibration energy collection device and vehicle |
| CN111725018A (en) * | 2020-06-22 | 2020-09-29 | Oppo广东移动通信有限公司 | Key, control circuit and electronic equipment |
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| US20040075363A1 (en) * | 2002-10-21 | 2004-04-22 | Malkin Matthew C. | Multi-frequency piezoelectric energy harvester |
| US20080079333A1 (en) * | 2006-10-02 | 2008-04-03 | Robert Bosch Gmbh | Energy harvesting device manufactured by print forming processes |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106168486A (en) * | 2016-08-30 | 2016-11-30 | 温州华邦安全封条股份有限公司 | A kind of vehicle positioning system and localization method thereof |
| CN106385199A (en) * | 2016-10-12 | 2017-02-08 | 南京航空航天大学 | Wind-induced vibration energy collection device for power supply of tire pressure monitoring system |
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| CN111725018A (en) * | 2020-06-22 | 2020-09-29 | Oppo广东移动通信有限公司 | Key, control circuit and electronic equipment |
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Application publication date: 20130320 |