CN106100441B - Piezoelectric energy collector and its Acquisition Circuit applied to deceleration driven - Google Patents
Piezoelectric energy collector and its Acquisition Circuit applied to deceleration driven Download PDFInfo
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- CN106100441B CN106100441B CN201610458437.9A CN201610458437A CN106100441B CN 106100441 B CN106100441 B CN 106100441B CN 201610458437 A CN201610458437 A CN 201610458437A CN 106100441 B CN106100441 B CN 106100441B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/181—Circuits; Control arrangements or methods
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/183—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using impacting bodies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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Abstract
The invention discloses a kind of piezoelectric energy collector and its Acquisition Circuit applied to deceleration driven, the technical problem low for solving existing piezoelectric energy collector collecting efficiency.Technical scheme is collector using impact type overarm arm configuration, vehicle is travelled when on deceleration strip, the mechanical energy of vehicle is converted to electric energy by the piezoelectric in collector, after vehicle sails out of deceleration strip, arm of hanging oneself from a beam is in the free vibration state with damping, piezoelectric continues the mechanical oscillation of itself being converted to electric energy, realizes the lasting output of electric energy.The Acquisition Circuit supporting with it enables its input impedance to match piezoelectric respectively in the impedance during being impacted and during free vibration, the energy maximization for exporting piezoelectric by controlling and changing the switch periods and dutycycle of DC DC switch converters.In addition, when no electric energy produces, piezoelectric energy Acquisition Circuit enters the park mode of extremely low power dissipation to save energy, significantly improves the collecting efficiency of acquisition system.
Description
Technical field
The present invention relates to a kind of piezoelectric energy collector, more particularly to a kind of piezoelectric energy applied to deceleration driven
Collector.Further relate to this piezoelectric energy collector Acquisition Circuit applied to deceleration driven.
Background technology
With the fast development of science and technology, the quality of life of the mankind is constantly lifted.At the same time, energy crisis and
Ball ecological environment deteriorates and increasingly sharpened, and energy-saving and emission-reduction and regenerative resource turn into current global heat subject.Piezoresistive material
Material can be converted mechanical energy into as electric energy, and the regenerative resource to produce green provides effective way.At present, in the whole world
In the range of car ownership continue to increase, automobile not only consumes substantial amounts of fossil energy, and it is dirty to result in serious air
Dye.Caused kinetic energy and gravitional force in vehicle travel process are collected, and is translated into electric energy using piezoelectric and is subject to profit
With, be improve energy use efficiency new approaches.
Document 1 " Authorization Notice No. is CN203071838U Chinese utility model patent " discloses a kind of based on piezoelectricity effect
The deceleration strip electricity generation system answered.The system includes TRT and the voltage conversion being sequentially connected with TRT and stable dress
Put, energy storage device.The TRT includes substrate support mechanism, piezo-electric device, guiding mechanism and sealing mechanism, piezo-electric device bottom
Seat.The operation principle of the TRT is:When pressure of the deceleration strip by automobile, substrate support mechanism compressing piezo-electric device becomes
Shape simultaneously produces electric energy.But the shortcomings that TRT is, the moment only in vehicle by deceleration strip, TRT is applied
Electric energy is just produced during pressure, and noenergy is exported after vehicle sails out of deceleration strip, therefore the time of device generation electric energy is non-
It is often of short duration, cause energy acquisition efficiency low.
" the Resistive impedance matching circuit for piezoelectric energy of document 2
Harvesting, Journal of Intelligent Material Systems and Structures, September
A kind of piezoelectric energy Acquisition Circuit implementation for vibration is proposed in 2010, Vol.21, pp.1293-1302 ".The electricity
The principle that road is transmitted according to that can realize ceiling capacity during impedance matching, by the input impedance of DC-DC switch converters and piezoresistive material
The output impedance of material matches, and improves the collecting efficiency of piezoelectric energy acquisition system.The circuit structure is simple, energy expenditure
It is low.But the shortcomings that circuit arrangement is, because the switch controller of DC-DC switch converters only produces the side of fixed switch periods
Ripple signal, therefore it is only applicable to the piezoelectricity acquisition system with fixed vibration frequency.In addition, the circuit arrangement does not propose incapability
Processing method during amount input.
The content of the invention
In order to overcome the shortcomings of that existing piezoelectric energy collector collecting efficiency is low, the present invention provides one kind and subtracted applied to road
The piezoelectric energy collector and its Acquisition Circuit of speed belt.The collector adds electric energy output using impact type overarm arm configuration
Time.Vehicle is travelled when on deceleration strip, and the mechanical energy of vehicle is converted to electric energy by the piezoelectric in collector, is sailed in vehicle
After deceleration strip, overarm arm is in the free vibration state with damping, and piezoelectric continues to be converted to the mechanical oscillation of itself
Electric energy, realize the lasting output of electric energy.The Acquisition Circuit supporting with it is by controlling and changing the switches of DC-DC switch converters
Cycle and dutycycle, its input impedance is set to match piezoelectric respectively in the resistance during being impacted and during free vibration
Energy maximization that is anti-, exporting piezoelectric.In addition, when no electric energy produces, piezoelectric energy Acquisition Circuit enters extremely low
The park mode of power consumption significantly improves the collecting efficiency of acquisition system to save energy.
The technical solution adopted for the present invention to solve the technical problems is：A kind of piezoelectric energy applied to deceleration driven
Collector, the arm base 1 that is characterized in including hanging oneself from a beam, overarm arm 2, impact bridge 3, impact bar 4, the first spring 5, spring seat 6,
Second spring 7, piezoelectric 8 and sheet metal 9.The one end on the surface of overarm arm base 1 is fixed with overarm arm 2, the other end and the
One spring 5 is connected；Overarm arm 2 is made up of piezoelectric 8 and sheet metal 9, and one end of overarm arm 2 is fixed on overarm arm base 1
Surface, the other end is hanging；Impact bridge 3 one side be fixed at the top of deceleration strip just below, another side connects first respectively
Spring 5, impact bar 4 and second spring 7；The one end of impact bar 4 is fixed on impact bridge 3, and the other end is suspended in oneself of overarm arm 2
By the vertical direction held；First spring 5 is placed between overarm arm base 1 and impact bridge 3；Second spring 7 is placed in spring
Between pedestal 6 and impact bridge 3.When vehicle reaches the top of deceleration strip, wheel compressing deceleration strip causes to impact bridge 3 and punching
Bar 4 is hit to decline；After impact bar 4 touches overarm arm 2, overarm arm 2 moves with impact bar 4, and now piezoelectric 8 starts to export
Voltage；Continue to travel with vehicle, the continuous decrease of impact bar 4, when wheel pressure reaches maximum, impact bar 4 reaches minimum
Point, the now output of piezoelectric 8 crest voltage；When wheel sails out of deceleration strip, because pressure reduces, the elastic force of spring forces punching
Hit bar 4 and return to initial position, now impact bar 4 does not contact with overarm arm 2, overarm arm 2 will at the maximum displacement make band
The free vibration of damping.
One such application is characterized in including full-bridge whole in the piezoelectric energy collector Acquisition Circuit of deceleration driven
Flow device, DC-DC switch converters and switch signal controller.The output electrode phase of the input of full-bridge rectifier and piezoelectric
Even, the output voltage of piezoelectric exports after full-bridge rectifier rectification gives DC-DC switch converters.Switch signal controller
Output connection DC-DC switch converters power stage switching tube NM1Grid, for control DC-DC switch converters realize
Charging to energy storage device.
Switch signal controller produces the power stage switching tube of periodic square-wave signal control DC-DC switch converters
NM1Break-make.Described switch signal controller by wake module, switching signal generation module, impulse period detection module with
And switching signal conversion module composition.The input of wake module is connected to the output end of full-bridge rectifier, its output signal point
Impulse period detection module, switching signal generation module and switching signal conversion module are not connected to, to start and control this
Three circuit module work.The input of impulse period detection module is connected to the output electrode both ends of piezoelectric, output end
It is connected to switching signal conversion module.The output end connecting valve signal generator module of switching signal conversion module, switching signal
The output end of generation module is connected to the power stage switching tube NM of DC-DC switch converters1Grid.
The function of wake module is detection automobile energy and starts other circuits start-up operations；Switching signal generation module is used
Power stage switching tube NM is controlled in producing1The periodic square wave signal of break-make；The function of impulse period detection module is detection punching
Hit whether the cycle terminates；After switching signal conversion module receives the signal that impulse period terminates, to switching signal generation module
Send the indication signal of alteration switch signal period.
Described switch signal controller can timely and accurately detect the presence of vehicle by deceleration strip, and control whole energy
Measure the work of Acquisition Circuit.When no vehicle by when, control energy acquisition circuit it is operated in the resting state of low-power consumption；
And when vehicle arrives, control DC-DC switch converters to be charged for energy storage device.In addition, in piezoelectric energy transfer process, open
OFF signal controller will also control the switch periods and dutycycle of DC-DC switch converters, it is realized impedance with piezoelectric
Matching.
The beneficial effects of the invention are as follows：The collector adds electric energy output time using impact type overarm arm configuration.Car
Traveling when on deceleration strip, the mechanical energy of vehicle is converted to electric energy by the piezoelectric in collector, and deceleration is sailed out of in vehicle
After band, overarm arm is in the free vibration state with damping, and piezoelectric continues the mechanical oscillation of itself being converted to electric energy, real
The lasting output of existing electric energy.The Acquisition Circuit supporting with it by control and change DC-DC switch converters switch periods and
Dutycycle, enable its input impedance match respectively piezoelectric during being impacted and free vibration during impedance, make
The energy maximization of piezoelectric output.In addition, when no electric energy produces, piezoelectric energy Acquisition Circuit enters extremely low power dissipation
Park mode significantly improves the collecting efficiency of acquisition system to save energy.
The present invention is elaborated with reference to the accompanying drawings and detailed description.
Brief description of the drawings
Fig. 1 is the structure chart for the piezoelectric energy collector that the present invention is applied to deceleration driven.
Fig. 2 is the block diagram for the piezoelectric energy collector Acquisition Circuit that the present invention is applied to deceleration driven.
Fig. 3 be the present invention be applied to deceleration driven piezoelectric energy collector in impact bar and overarm arm displacement and
The output voltage waveform of piezoelectric.
Fig. 4 is Fig. 2 implementation illustration.
Fig. 5 is the signal waveform of switch signal controller in Fig. 2.
In figure, 1- overarm arm bases, 2- overarm arms, 3- impact bridges, 4- impact bars, the springs of 5- first, 6- spring seats,
7- second springs, 8- piezoelectrics, 9- sheet metals.
Embodiment
Following examples reference picture 1~5.
The piezoelectric energy collector that the present invention is applied to deceleration driven includes overarm arm base 1, overarm arm 2, impact bar
Frame 3, impact bar 4, the first spring 5, spring seat 6, second spring 7, piezoelectric 8 and sheet metal 9.The table of overarm arm base 1
The one end in face is fixed with overarm arm 2, and the other end is connected with the first spring 5；Arm 2 hang oneself from a beam by 9 groups of piezoelectric 8 and sheet metal
Into one end of overarm arm 2 is fixed on the surface of overarm arm base 1, and the other end is hanging；The one side of impact bridge 3 is fixed on deceleration
Just following with top, another side connects the first spring 5, impact bar 4 and second spring 7 respectively；The one end of impact bar 4 is fixed on punching
Hit on bridge 3, the other end is suspended in the vertical direction of the free end of overarm arm 2；First spring 5 is placed in the He of overarm arm base 1
Impact between bridge 3；Second spring 7 is placed between spring seat 6 and impact bridge 3.When vehicle reaches the top of deceleration strip
When, wheel compressing deceleration strip causes to impact bridge 3 and impact bar 4 declines；After impact bar 4 touches overarm arm 2, arm 2 of hanging oneself from a beam
Moved with impact bar 4, now piezoelectric 8 starts output voltage；Continue to travel with vehicle, the continuous decrease of impact bar 4, when
Impact bar 4 reaches minimum point when wheel pressure reaches maximum, and now piezoelectric 8 exports crest voltage；When wheel sails out of deceleration
During band, because pressure reduces, the elastic force of spring forces impact bar 4 to return to initial position, and now impact bar 4 is with hanging oneself from a beam arm 2 not
Contact, the free vibration that overarm arm 2 will make band at maximum displacement and damp.
One such application in the piezoelectric energy collector Acquisition Circuit of deceleration driven, including full-bridge rectifier,
Three module compositions of power stage and switch signal controller of Buck-boost type DC-DC switch converters.Full-bridge rectifier
Input be directly connected with the output electrode of piezoelectric, the output voltage of piezoelectric is defeated after full-bridge rectifier rectification
Go out and give Buck-boost type DC-DC switch converters.The output connection Buck-boost types DC-DC switches of switch signal controller
The power stage switching tube NM of converter1Grid, for control Buck-boost type DC-DC switch converters realize to accumulator
The charging of part.
Switch signal controller produces the work(of periodic square-wave signal control Buck-boost type DC-DC switch converters
Rate level switching tube NM1Break-make.Described switch signal controller is by wake module, switching signal generation module, impulse period
Four module compositions of detection module and switching signal conversion module.The input of wake module is connected to the defeated of full-bridge rectifier
Go out end, its output signal is connected respectively to impulse period detection module, switching signal generation module and switching signal and becomes mold changing
Block, to start and control these three circuit modules to work.The input of impulse period detection module is connected to the defeated of piezoelectric
Go out electrode both ends, output end is connected to switching signal conversion module.The output end connecting valve signal of switching signal conversion module
Generation module, the power stage that the output end of switching signal generation module is connected to Buck-boost type DC-DC switch converters are opened
Close pipe NM1Grid.
The function of wake module is detection automobile energy and starts other circuits start-up operations；Switching signal generation module is used
Power stage switching tube NM is controlled in producing1The periodic square wave signal of break-make；The function of impulse period detection module is detection punching
Hit whether the cycle terminates；After switching signal conversion module receives the signal that impulse period terminates, to switching signal generation module
Send the indication signal of alteration switch signal period.
The switch signal controller can timely and accurately detect the presence of vehicle by deceleration strip, and control whole energy to adopt
The work of collector.When no vehicle by when, it control energy acquisition circuit it is operated in the resting state of low-power consumption；And
When vehicle arrives, it controls DC-DC switch converters to be charged for energy storage device.In addition, in piezoelectric energy transfer process, open
OFF signal controller will also control the switch periods and dutycycle of DC-DC switch converters, it is realized impedance with piezoelectric
Matching, to improve energy acquisition efficiency.
In order to realize the transmission of the maximal efficiency of electric energy and collection, it is desirable to Buck-boost type DC-DC switch converters etc.
The output resistance of effect input resistance and piezoelectric matches.The equivalent inpnt electricity of Buck-boost type DC-DC switch converters
Resistance is by the inductance value in converter and switching tube NM1Be turned on and off time decision, can be represented with 1) formula, wherein L is electric
Inductance value, T are the cycle of switching signal, and D is the dutycycle of switching signal.
Fig. 4 is the specific implementation of piezoelectric energy Acquisition Circuit proposed by the present invention.Wake module is by difference amplifier
A1, N-type MOSFET pipes NM3With p-type MOSFET PM1Composition.A1By input capacitance CinNM is output to after the voltage amplification at both ends3's
Grid.NM3Source ground GND, drain electrode meet comparator A2With difference amplifier A3Negative power supply pin V-、PM1Grid
And A2The earth terminal V of accessory circuitGND。PM1Source electrode connect externally fed power Vcc, drain electrode meets 555 timer A4Power supply draw
Pin Vcc555。
Work as A1Output voltage stabilization and be more than NM3Threshold voltage when, switching tube NM3Conducting, due to NM3Electric conduction
Hinder very small, NM3Drain electrode-source electrode between be similar to short circuit, now NM3Drain electrode approximately ground GND.Therefore, A2And A3's
Negative power supply pin V-、A2The earth terminal V of accessory circuitGNDAnd PM1Grid be grounded, A2And A3Start working, that is, switch
Signal generator module and impulse period detection module are started working.At the same time, PM is worked as1Grounded-grid when, PM1Conducting, A4It is logical
Electrically activate, switching signal conversion module also begins to work.
In contrast, A is worked as1Output voltage be less than NM3Threshold voltage when, switching tube NM3Shut-off, causes A2And A3It is negative
Power supply pin is hanging, and in high-impedance state, no current path, now switching signal generation module and impulse period detect mould
Block does not work.Simultaneously because PM1Shut-off, A4Supply voltage be turned off, switching signal conversion module is also stopped.Now,
Whole Acquisition Circuit enters the park mode of low-power consumption.It should be strongly noted that in park mode, due to A2Negative power supply electricity
Source is cut off, no current path, now A2Output be slightly below supply voltage VccHigh level, reverser A5Output to be low
Level, so as to close power stage switching tube NM1.During park mode, only wake module normal work, other circuit modules enter
The park mode of low-power consumption.
In addition, can be by changing A1Multiplication factor regulation circuit startup voltage.For example, initialization circuit startup voltage is
1V, and A2Supply voltage VccFor 3.7V.Now adjust A1Multiplication factor be 3.7 times, work as CinBoth end voltage rises to 1V simultaneously
When continuing rise, A1Output be stably maintained at 3.7V so that NM3And PM1Conducting, switch signal controller normal work；Work as Cin
When both end voltage drops to 1V and continues to reduce, A1Output be gradually reduced, until less than NM3Threshold voltage when, NM3And PM1
Shut-off, switch signal controller enter Low-power-consumptiodormancy dormancy pattern.
It can be seen from the above-mentioned analysis to piezoelectric energy collector, the length of impulse period is determined by the speed of vehicle.It is logical
The speed that normal vehicle passes through deceleration strip is 10~15 kilometers/hour, and now the output resistance of piezoelectric is at hundreds of kilo-ohms or so；
And the vibration frequency of vibration period is fixed as the natural frequency of piezoelectric, now the output resistance of piezoelectric is tens of kilo-ohms
Left and right.Therefore, in order to improve the energy acquisition efficiency of circuit, it is necessary to respectively for impulse period and the vibration period adjustment DC-DC
The equivalent inpnt resistance (being realized by the cycle and dutycycle that adjust switching signal) of switch converters, with realization and piezoelectric
Impedance matching.
When the output voltage of piezoelectric is by crest voltage vanishing, impulse period terminates, and can design impact week accordingly
Phase detection module.Impulse period detection module A3Input be connected to the both ends of piezoelectric, A3Negative supply voltage ground connection
(in the normal mode of operation), therefore, when input is positive voltage, A3Output for amplification after positive voltage；If on the contrary, input
For negative voltage when, A3Output vanishing.Therefore, when impulse period terminates to enter the vibration period, because piezoelectric exports
Voltage is changed into negative voltage, A from positive voltage3Output be changed into 0 from positive voltage, until next voltage positive period of piezoelectric goes out
Now, A3Output be changed into positive voltage again.
Switching signal conversion module is using 555 timer A4The single-shot trigger circuit of realization.Work as A4Trigger pins connect
When receiving first trailing edge, the circuit will be triggered.In impulse period, A4Output is zero, when impulse period detection module
When output is by positive vanishing, trailing edge triggering A4, now A4Output voltage be equal to A4Supply voltage.By adjusting R1C1's
Value can set A4The time of output HIGH voltage after being triggered, it is desirable to A4The time of output HIGH voltage is more than the vibration period.A4It is triggered
The high level exported afterwards causes NM2Conducting, makes electric capacity CC2Switching signal generation module is acted on, so as to produce new switch letter
Number.
Switching signal generation module is by using low power consumption comparator A2The oscillator and reverser A of design5Realize.Reverser
A5For driving switch pipe NM1, while make switching tube NM in park mode1Shut-off.And A5Available for reducing A2Output level
Rising and falling time, reach and reduce switching tube NM1Switching loss purpose.In impulse period, due to switching tube NM2Close
It is disconnected, A2Only by electric capacity CC1The high-low voltage of charge and discharge control output.Therefore, the week of the switching signal exported in impulse period
Phase TiWith dutycycle DiIt can be expressed as：
At the end of switching signal conversion module detects impulse period, A4It is triggered so that NM2Turn on, now CC2Make
For switching signal generation module.Therefore, the cycle T of the switching signal exported in the vibration periodvWith dutycycle DvIt can represent respectively
For：
Because in impulse period and vibration period, the cycle of switching signal and dutycycle are different, from 1) formula, this
When DC-DC switch converters equivalent inpnt resistance it is also different, so as to which impedance matching with piezoelectric can be realized, to improve energy
Measure collecting efficiency.
Fig. 5 is the signal waveform of switch signal controller in piezoelectric energy Acquisition Circuit proposed by the present invention, including piezoelectricity
The output voltage of the open-circuit voltage of material output and four modules of switch signal controller.The wherein open circuit electricity of piezoelectric
Voltage crest value is arranged to 48V, the supply voltage V of switch signal controllerCCIt is set as the output voltage 3.8V of battery.In piezoelectric
Output voltage persistently rise and wake module output V1Higher than NM3Threshold voltage when, NM3Conducting, the output control of wake module
Signal V processedGNDGround connection, start impulse period detection module, switching signal conversion module and switching signal generation module and start normally
Work, now the output V of switching signal generation module5The output cycle is Ti, dutycycle DiSquare-wave signal controlling switch pipe
NM1Break-make.After impulse period terminates, the output V of impulse period detection module3It is changed into 0 from 1, trailing edge trigger switch letter
Number conversion module, causes V4Export high level.The V of high level4Make NM2Conducting, CC2Switching signal generation module is acted on, now
V5The output cycle is Tv, dutycycle DvNew square-wave signal to match the impedance in piezoelectric material vibration period.When wake module
Export V1Less than NM3Threshold voltage when, the output control signal V of wake moduleGNDIt is hanging to be in high-impedance state, impulse period detection
Module, switching signal conversion module and switching signal generation module are stopped, and circuit enters park mode.Until wake module
Output V1Higher than NM3Threshold voltage when, circuit recover normal mode of operation.
Claims (1)
1. a kind of piezoelectric energy collector Acquisition Circuit applied to deceleration driven, described piezoelectric energy collector includes
Overarm arm base (1), overarm arm (2), impact bridge (3), impact bar (4), the first spring (5), spring seat (6), the second bullet
Spring (7), piezoelectric (8) and sheet metal (9)；The one end on overarm arm base (1) surface is fixed with overarm arm (2), the other end
It is connected with the first spring (5)；Overarm arm (2) is made up of piezoelectric (8) and sheet metal (9), and one end of overarm arm (2) is fixed
On the surface of overarm arm base (1), the other end is hanging；Impact bridge (3) one side be fixed at the top of deceleration strip just below, separately
The first spring (5), impact bar (4) and second spring (7) are simultaneously connected respectively；Impact bar (4) one end is fixed on impact bridge (3)
On, the other end is suspended in the vertical direction of the free end of overarm arm (2)；First spring (5) is placed in overarm arm base (1) and punching
Hit between bridge (3)；Second spring (7) is placed between spring seat (6) and impact bridge (3)；When vehicle reaches deceleration strip
Top when, wheel compressing deceleration strip cause impact bridge (3) and impact bar (4) decline；When impact bar (4) touches overarm arm
(2) after, overarm arm (2) moves with impact bar (4), and now piezoelectric (8) starts output voltage；Continue to go with vehicle
Sail, impact bar (4) continuous decrease, when wheel pressure reaches maximum, impact bar (4) reaches minimum point, now piezoelectric (8)
Export crest voltage；When wheel sails out of deceleration strip, because pressure reduces, the elastic force of spring forces impact bar (4) to return to just
Beginning position, now impact bar (4) do not contacted with overarm arm (2), overarm arm (2) by do at maximum displacement band damping oneself
By vibrating, it is characterised in that：Described Acquisition Circuit includes full-bridge rectifier, DC-DC switch converters and switching signal control
Device；The input of full-bridge rectifier is connected with the output electrode of piezoelectric, and the output voltage of piezoelectric passes through full-bridge rectification
Exported after device rectification and give DC-DC switch converters；The power stage of the output connection DC-DC switch converters of switch signal controller
Switching tube NM1Grid, for controlling DC-DC switch converters to realize charging to energy storage device；
Switch signal controller produces the power stage switching tube NM of periodic square-wave signal control DC-DC switch converters1It is logical
It is disconnected；Described switch signal controller is believed by wake module, switching signal generation module, impulse period detection module and switch
Number conversion module composition；The input of wake module is connected to the output end of full-bridge rectifier, and its output signal is connected respectively to
Impulse period detection module, switching signal generation module and switching signal conversion module, to start and control these three circuits
Module works；The input of impulse period detection module is connected to the output electrode both ends of piezoelectric, and output end is connected to out
OFF signal conversion module；The output end connecting valve signal generator module of switching signal conversion module, switching signal generation module
Output end be connected to the power stage switching tube NM of DC-DC switch converters1Grid；
The function of wake module is detection automobile energy and starts other circuits start-up operations；Switching signal generation module is used to produce
Raw control power stage switching tube NM1The periodic square wave signal of break-make；The function of impulse period detection module is detection impact week
Whether the phase terminates；After switching signal conversion module receives the signal that impulse period terminates, sent to switching signal generation module
The indication signal of alteration switch signal period；
Described switch signal controller can timely and accurately detect the presence of vehicle by deceleration strip, and control whole energy to adopt
The work of collector；When no vehicle by when, control energy acquisition circuit it is operated in the resting state of low-power consumption；And work as
When vehicle arrives, DC-DC switch converters are controlled to be charged for energy storage device；In addition, in piezoelectric energy transfer process, switch letter
Number controller will also control the switch periods and dutycycle of DC-DC switch converters, it is realized impedance matching with piezoelectric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610458437.9A CN106100441B (en) | 2016-06-22 | 2016-06-22 | Piezoelectric energy collector and its Acquisition Circuit applied to deceleration driven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610458437.9A CN106100441B (en) | 2016-06-22 | 2016-06-22 | Piezoelectric energy collector and its Acquisition Circuit applied to deceleration driven |
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| CN106758916B (en) * | 2017-01-13 | 2019-02-12 | 合肥工业大学 | A kind of pavement facilities of the detachable oscillation speed reducing warning device based on piezo-electric generating |
| CN108594880B (en) * | 2018-04-03 | 2020-03-10 | 西北工业大学 | Self-sensing mixed negative capacitance synchronous switch damping circuit for structural vibration control |
| CN108599351B (en) * | 2018-05-23 | 2021-11-05 | 安徽国电京润电力科技有限公司 | Electric energy collecting device and using method thereof |
| CN110071660B (en) * | 2019-06-05 | 2024-01-09 | 浙大城市学院 | Piezoelectric energy harvester |
| CN111726035B (en) * | 2020-06-10 | 2022-06-03 | 北京交通大学 | Tuned mass piezoelectric energy harvester and manufacturing method thereof |
| CN112953304B (en) * | 2021-04-22 | 2022-06-17 | 长春工业大学 | Umbrella type road piezoelectric power generation device |
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| CN103516256B (en) * | 2013-04-07 | 2015-09-30 | 南京理工大学 | A kind of composite energy collection device based on vibrational energy and solar energy |
| CN105745833B (en) * | 2013-12-13 | 2019-04-19 | 住友理工株式会社 | Vibration generating device |
| CN204118842U (en) * | 2014-09-15 | 2015-01-21 | 中国地质大学（武汉） | One tramples piezoelectric type continuous generating device |
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