CN103904781A - Self-powered piezoelectric vibration energy synchronous extraction circuit - Google Patents
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Abstract
The invention discloses a self-powered piezoelectric vibration energy synchronous extraction circuit. The self-powered piezoelectric vibration energy synchronous extraction circuit comprises a piezoelectric element, a positive semi-cycle and negative semi-cycle detection interlocking control circuit, a positive extreme value detection circuit, a negative extreme value detection circuit, four switches, an inductor, a diode, an energy storage capacitor and a load. The positive semi-cycle and negative semi-cycle detection interlocking control circuit controls two of the four switches to be turned on in a positive semi-cycle and a negative semi-cycle respectively, the positive extreme value detection circuit and the negative extreme value detection circuit control the other two switches to be turned on when a positive extreme value and a negative extreme value are reached, LC resonance is made generated by the inductor and the capacitor inside the piezoelectric element, piezoelectric energy is synchronously extracted to the inductor, and the energy is transferred onto the energy storage capacitor through the follow current of the diode. The whole circuit is designed to be powered by itself, energy is extracted by automatically detecting the state of the piezoelectric element and controlling the on-off of the four switches, and compared with an existing piezoelectric energy extraction circuit, the self-powered piezoelectric vibration energy synchronous extraction circuit has the advantages that the size of the circuit is reduced, power consumption of the circuit is reduced, the extraction efficiency is improved, the extraction is independent of the load, and the circuit can be used within a wide vibration frequency band range.
Description
Technical field
The present invention relates to vibrational energy assembling sphere, relate in particular to a kind of self-powered piezoelectric vibration energy synchronous extraction circuit.
Background technology
Along with the development of integrated circuit technique, precision processing technology, computer technology, wireless network communication technology, various small electronic equipments, MEMS (micro electro mechanical system) (MEMS) take wireless sensor network (WSNs) as main application form continue to bring out.Along with WSNs is in the deep development of the every field such as health care (medical monitoring instrument of Wearable, embedded or implanted etc.), environmental monitoring system (forest fire, freshwater monitoring, climate change, marine monitoring etc.), domestic safety system, performance to the various small electronic equipments as node is had higher requirement, and what wherein receive much concern is node life problems.In some applications, as being arranged on sensing node, the implantation type wireless sensing node of medical application etc. in the region difficult to get access such as awful weather area or forest ocean for environmental disaster control, once power supply exhausts or is damaged, not only nodal information collection is interrupted, and also can affect the accuracy of whole network information processing.
Piezoelectric type vibration energy collector utilizes the direct piezoelectric effect of piezoelectric, and the vibrational energy in environment is converted to electric energy.At present, the extensive use of the electronic device of low-power consumption and radio frequency technology provides larger development platform for the utilization of piezoelectric type vibrational energy.
Alternation because vibration makes the voltage of piezoelectric element output, and the power supply of common small electronic equipment and radio sensing network node is to need galvanic current to press, so, between piezoelectric element and power consumption equipment, need design interface circuit, there is at present several frequently seen interface circuit, wherein the most classical is the current rectifying and wave filtering circuit of simple diode full-bridge rectification and a filter capacitor, but, due to the existence of capacitor C p in the inside equivalent electric circuit of piezoelectric element, first piezoelectric element will charge to Cp, the voltage that exceedes the filter capacitor of rectifier bridge rear end when the voltage of Cp is added after the pressure drop of two diodes, could be to the capacitor charging of rear end, not only organic efficiency is low to cause sort circuit, and the power reclaiming is affected by the size of rear end capacitance voltage and load.Therefore, researcher has proposed multiple nonlinear energy and has extracted circuit, mainly comprise the synchro switch inductive circuit (P-SSHI) that Lefeuvre in parallel and Guyomar etc. propose, the series connection synchro switch inductive circuit (S-SSHI) that Taylor etc. propose, the synchronous charge-extraction circuit (SECE) that Lefeuvre etc. propose, and two simultaneous switching circuits (DSSH) of proposing such as the Lallart deriving from these three kinds of circuit bases, Nanjing Aero-Space University's fur coat enters the great synchronous charge-extraction circuit of Optimization-type (OSECE) and the two synchro switch inductance recovery circuits (ESSH) of enhancement mode etc. that propose of waiting.
When P-SSHI circuit arrives extreme value when structural vibration, the inductance that quick-make is in parallel with piezoelectric element capacitor C p, the Main Function of synchro switch inductance is by LC resonance, piezoelectric element voltage to be overturn fast, can effectively increase the open circuit voltage of piezoelectric patches, in one-period, increase the time of Energy Transfer.And in S-SSHI circuit, the Main Function of synchro switch inductance extracts piezoelectric element electric charge by the LC resonance of two electric capacity and an inductance.But that these two kinds of circuit regenerative powers are affected by the size of rear end capacitance voltage and load impedance is still larger.
SECE, OSECE, DSSH, ESSH circuit have solved this problem, and its regenerative power and rear end electric capacity and load are irrelevant.But these circuit have advantage in theory very much, the actual too complexity that implements but.Mainly due to the closing time control that relates to electronic switch in synchronous charge-extraction SECE technology, the switch of this circuit requires to complete conducting and the disconnection of switch within 1/4 cycle of LC resonance, and requirement is very accurate, in actual energy retracting device, more difficult realization.OSECE circuit is on the basis of SECE circuit, optimize its switch-control strategy, make the control of analog switch in circuit become simple, and provide the self-powered scheme of low-power consumption, but in OSECE Acquisition Circuit, need the coupling flyback transformer of three coils, cause integrated circuit bulky, and the quality factor of flyback transformer are had higher requirements.DSSH circuit has improved circuit regenerative power to a great extent, but this circuit has adopted two inductance and two cover switching circuit and testing circuits, increased the volume of circuit, and the on-off control system of this circuit complexity in providing the DSP control system of power supply, the external world could realize it.The proposition of ESSH circuit has solved DSSH circuit and has realized this key technology difficult problem of self-powered, makes this energy recovering circuit step a crucial step to practical application.But the electric power system of ESSH circuit complexity and energy management system make within the final output voltage of this circuit can only remain on a lower scope.
Summary of the invention
The present invention's object: propose a kind of self-powered piezoelectric vibration energy synchronous extraction circuit, this circuit adopts positive-negative half-cycle automatically to detect interlocking technology and positive and negative extreme value to detect control technology and realize the high efficiency extraction of piezoelectric energy electric charge.
In order to realize the present invention's object, intend adopting following technology:
A kind of self-powered piezoelectric vibration energy synchronous extraction circuit, comprises piezoelectric element (PZT), positive-negative half-cycle detects interlocking control circuit, positive extreme value testing circuit, negative pole value testing circuit, inductance (L), the first diode (D1), storage capacitor (Cr), load resistance (RL), first, second, the 3rd, the 4th switch (S1, S2, S3, S4), 1 pin of piezoelectric element (PZT) and positive-negative half-cycle detect a end of interlocking control circuit automatically, positive extreme value detection trigger circuit anode, the negative terminal of negative pole value detection trigger circuit is connected, and 2 pin of piezoelectric element (PZT) and positive-negative half-cycle detect the b end of interlocking control circuit automatically, positive extreme value detection trigger circuit negative terminal, the anode of negative pole value detection trigger circuit is connected, and 1 pin of piezoelectric element (PZT) and positive-negative half-cycle detect the first switch (S1) that interlocking is controlled automatically, one end of the 3rd switch (S3) of positive extreme value detection trigger circuit control is connected, and 2 pin of piezoelectric element (PZT) and positive-negative half-cycle detect the second switch (S2) that interlocking is controlled automatically, one end of the 4th switch (S4) of negative pole value detection trigger circuit control is connected.After the other end of the first switch (S1) and second switch (S2) is interconnected, be connected with 2 pin of inductance (L), after the other end of the 3rd switch (S3) and the 4th switch (S4) is interconnected, be connected with 1 pin of inductance (L), 2 pin of inductance (L) are connected with the anode of the first diode (D1), 1 pin of inductance (L) is connected with Circuits System output ground (GND), the negative terminal of the first diode (D1) is connected with storage capacitor (Cr) anode, storage capacitor (Cr) anode is connected with system load (RL) and output dc voltage (Vdc), storage capacitor (Cr) is all connected with circuit output ground (GND) with the negative terminal of load (RL).
Two NMOS field effect transistor first field effect transistor (Q1) of interlocking and the second field effect transistor (Q2) formation positive-negative half-cycle detection interlocking control circuit and the first switch (S1), second switch (S2) circuit, the first field effect transistor (Q1) is connected with the source electrode of the second field effect transistor (Q2) and is connected with 2 pin of inductance, the grid of the first field effect transistor (Q1) is connected with the drain electrode of the second field effect transistor (Q2), and the grid of the second field effect transistor (Q2) is connected with the drain electrode of the first field effect transistor (Q1).
Positive extreme value testing circuit is by the second diode (D2), the first electric capacity (C1), positive-negative-positive the 5th triode (Q5) forms, 1 pin of piezoelectric element connects the anode of the second diode (D2), the negative terminal end of the second diode (D2) connects the anode of the first electric capacity (C1), the negative terminal of the first electric capacity (C1) connects 2 pin of piezoelectric element (PZT), the negative terminal of the second diode (D2) connects the emitter of positive-negative-positive the 5th triode (Q5), the anode of the second diode (D2) connects the base stage of positive-negative-positive the 5th triode (Q5), the 3rd switch (S3) is controlled in the collector electrode output of positive-negative-positive the 5th triode (Q5), NPN type the 3rd triode (Q3) forms the 3rd switch (S3), the base stage of the 3rd triode (Q3) connects the collector electrode of the 5th triode (Q5), the collector electrode of the 3rd triode (Q3) connects 1 pin of piezoelectric element (PZT), the emitter of the 3rd triode (Q3) connects 1 pin of inductance (L), negative pole value testing circuit is by the 3rd diode (D3), the second electric capacity (C2), positive-negative-positive the 6th triode (Q6) forms, 2 pin of piezoelectric element connect the anode of the 3rd diode (D3), the negative terminal end of the 3rd diode (D3) connects the anode of the second electric capacity (C2), the negative terminal of the second electric capacity (C2) connects 1 pin of piezoelectric element (PZT), the negative terminal of the 3rd diode (D3) connects the emitter of positive-negative-positive the 6th triode (Q6), the anode of the 3rd diode (D3) connects the base stage of positive-negative-positive the 6th triode (Q6), the 4th switch (S4) is controlled in the collector electrode output of positive-negative-positive the 6th triode (Q6), NPN type the 4th triode (Q4) forms the 4th switch (S4), the base stage of the 4th triode (Q4) connects the collector electrode of the 6th triode (Q6), the collector electrode of the 4th triode (Q4) connects 2 pin of piezoelectric element (PZT), the emitter of the 4th triode (Q4) connects 1 pin of inductance (L).
beneficial effect
The invention discloses a kind of self-powered piezoelectric vibration energy synchronous extraction circuit, comprise that piezoelectric element, positive-negative half-cycle detect interlocking control circuit, positive and negative extreme value testing circuit, four switches, inductance, diode, storage capacitor, load resistance.Wherein positive-negative half-cycle detects two switches of interlocking control circuit control respectively in negative half period and positive half cycle conducting, positive and negative extreme value testing circuit is controlled respectively the conducting after positive and negative extremum arrival of two other switch, make inductance and piezoelectric element internal capacitance produce LC resonance, piezoelectric energy is synchronously extracted to inductance, and by diode continuousing flow, energy is transferred on storage capacitor.Integrated circuit adopts self-powered design, automatically the break-make that detects the state of piezoelectric element and control four switches is extracted energy, compared with extracting circuit with existing piezoelectric energy, reduce circuit volume, reduce oneself power consumption, improve extraction efficiency, and extracted power and load and have nothing to do, in wider vibration frequency band range, all can use.
The major embodiment aspect of beneficial effect:
1. described in, positive-negative half-cycle detects interlocking control circuit, when this structure has guaranteed that the pressure reduction at piezoelectric element two ends is less than threshold voltage, the field effect transistor of two interlockings all disconnects, and has prevented the shake of two frequent switches of switch and consumed energy in two positive and negative threshold voltage ranges.And adopt field effect transistor to realize switching over and can effectively reduce conduction voltage drop and conducting resistance.The power consumption of effectively having saved circuit own, has increased extraction efficiency.
2. described in positive and negative extreme value testing circuit, because the base current of triode will be much smaller than the electric current of collector electrode, so the capacitor discharge speed that extreme value detects is slower than piezoelectric element internal capacitance, thereby guaranteed to extract switching tube in circuit continue be conducting to, the project organization of this circuit has guaranteed that the energy of a charge that extreme value testing circuit electric capacity accumulates is also extracted to inductance from same circuit, thereby reduce circuit oneself power consumption, improved the conversion efficiency of energy.
3. in circuit structure of the present invention, cancel the rectifier bridge structure in traditional SECE structure, adopted four switching tubes to coordinate between two optimal control accuracy.Testing circuit all adopts passive structural design, has reduced the system power dissipation of circuit.By structure optimization, the present invention, without the coupling flyback transformer that adopts required three coil in OSECE Acquisition Circuit, has reduced the volume of system greatly, has simplified circuit.
4. circuit structure of the present invention disconnects and being connected of front end piezoelectric element in the time that the electric current of inductance reaches peaked, by the diode continuousing flow of rear end, because inductance can produce induced electromotive force, no matter the voltage of the storage capacitor of rear end is how much can start storage capacitor charging, so the size of the extraction power output of this circuit and the voltage of storage capacitor and the load resistance of rear end is irrelevant.
5. due to the high several orders of magnitude of frequency of the outer vibration of frequency ratio of resonance can be set, so this circuit structure can all can use in wider vibration frequency band range.
Accompanying drawing explanation
Fig. 1 is self-powered piezoelectric vibration energy synchronous extraction method schematic diagram of the present invention;
Fig. 2 is the synchronous physical circuit figure extracting of the self-powered piezoelectric vibration energy of the present invention.
Embodiment
A kind of self-powered piezoelectric vibration energy synchronous extraction circuit, as shown in Figure 1, comprises piezoelectric element PZT, positive-negative half-cycle detects interlocking control circuit, positive extreme value testing circuit, negative pole value testing circuit, inductance L, the first diode D1, storage capacitor Cr, load resistance RL, first, second, the 3rd, the 4th switch (S1, S2, S3, S4), 1 pin of piezoelectric element PZT and positive-negative half-cycle detect a end of interlocking control circuit automatically, the anode of positive extreme value detection trigger circuit, the negative terminal of negative pole value detection trigger circuit is connected, and 2 pin of piezoelectric element PZT and positive-negative half-cycle detect the b end of interlocking control circuit automatically, the negative terminal of positive extreme value detection trigger circuit, the anode of negative pole value detection trigger circuit is connected, and 1 pin of piezoelectric element PZT and positive-negative half-cycle detect the first switch S 1 that interlocking is controlled automatically, the 3rd switch S 3 of positive extreme value detection trigger circuit control is connected, and 2 pin of piezoelectric element PZT and positive-negative half-cycle detect the second switch S2 that interlocking is controlled automatically, the 4th switch S 4 of negative pole value detection trigger circuit control is connected.After the other end of the first switch S 1 and second switch S2 is interconnected, be connected with 2 pin of inductance L, after the other end of the 3rd switch S 3 and the 4th switch S 4 is interconnected, be connected with 1 pin of inductance L, 2 pin of inductance L are connected with the anode of the first diode D1,1 pin of inductance L is connected with Circuits System output ground GND, the negative terminal of the first diode D1 is connected with storage capacitor Cr anode, storage capacitor Cr anode is connected with system load RL and output dc voltage Vdc, and storage capacitor Cr is all connected with circuit output ground GND with the negative terminal of load RL.
Be greater than the positive half period of 2 pin voltages at the 1 pin voltage of piezoelectric element PZT, second switch S2 conducting, the conducting after the positive extreme value of piezoelectric element PZT arrives of the 3rd switch S 3, inductance L and piezoelectric element internal capacitance Cp produce LC resonance, the all after dates of 1/4 LC that vibrates, piezoelectric element internal capacitance Cp voltage drop to zero, the electric current in inductance L is increased to maximum, second switch S2 and the 3rd switch S 3 disconnect, and inductance L is transferred to energy on storage capacitor by diode continuousing flow.Completing positive half period synchronous energy extracts.
Be greater than the negative half-cycle of 2 pin voltages at the 1 pin voltage of piezoelectric element PZT, the first switch S 1 conducting, the conducting after the positive extreme value of piezoelectric element PZT arrives of the 3rd switch S 4, inductance L and piezoelectric element internal capacitance Cp produce LC resonance, the all after dates of 1/4 LC that vibrates, piezoelectric element internal capacitance Cp voltage drop to zero, the electric current in inductance L is increased to maximum, the first switch S 1 and the 4th switch S 4 disconnect, and inductance L is transferred to energy on storage capacitor by diode continuousing flow.Completing negative half-cycle synchronous energy extracts.
As shown in Figure 2, two NMOS field effect transistor first field effect transistor (Q1) of interlocking and the second field effect transistor (Q2) formation positive-negative half-cycle detection interlocking control circuit and the first switch (S1), second switch (S2) circuit, the first field effect transistor Q1 is connected with the source electrode of the second field effect transistor Q2 and is connected with 2 pin of inductance, the grid of the first field effect transistor Q1 is connected with the drain electrode of the second field effect transistor Q2, and the grid of the second field effect transistor Q2 is connected with the drain electrode of the first field effect transistor Q1.
Be greater than 2 pin voltages and exceed the positive half period of a threshold voltage of field effect transistor at 1 pin voltage of piezoelectric element (PZT), second field effect transistor Q2 conducting the first field effect transistor Q1 cut-off, be greater than 1 pin voltage and exceed the negative half-cycle of a threshold voltage of field effect transistor at 2 pin voltages of piezoelectric element, first field effect transistor Q1 conducting the second field effect transistor Q2 cut-off, realize positive-negative half-cycle and detect the switching of interlocking control switch, 2 pin in positive half cycle inductance L are communicated with 2 pin of piezoelectric element PZT by the second field effect transistor Q2, 2 pin in negative half period inductance L are communicated with 1 pin of piezoelectric element PZT by the second field effect transistor Q2.
Positive-negative half-cycle detects in interlocking control circuit, when structure of the present invention has guaranteed that the pressure reduction at piezoelectric element two ends is less than threshold voltage, the field effect transistor of two interlockings all disconnects, and has prevented the shake of two frequent switches of switch and consumed energy in two positive and negative threshold voltage ranges.And adopt field effect transistor to realize switching over and can effectively reduce conduction voltage drop and conducting resistance.The power consumption of effectively having saved circuit own, has increased extraction efficiency.
Positive and negative extreme value testing circuit is controlled respectively the conducting after positive and negative extremum arrival of two other switch, make inductance L and piezoelectric element internal capacitance Cp produce LC resonance, piezoelectric energy is synchronously extracted to inductance L, and by diode continuousing flow, energy is transferred on storage capacitor.
As shown in Figure 2, positive extreme value testing circuit is by the second diode D2, the first capacitor C 1, positive-negative-positive the 5th triode Q5 forms, 1 pin of piezoelectric element connects the anode of the second diode D2, the negative terminal end of the second diode D2 connects the anode of the first capacitor C 1, the negative terminal of the first capacitor C 1 connects 2 pin of piezoelectric element PZT, the negative terminal of the second diode D2 connects the emitter of positive-negative-positive the 5th triode (Q5), the anode of the second diode D2 connects the base stage of positive-negative-positive the 5th triode Q5, the 3rd switch S 3 is controlled in the collector electrode output of positive-negative-positive the 5th triode Q5, NPN type the 3rd triode Q3 forms the 3rd switch S 3, the base stage of the 3rd triode Q3 connects the collector electrode of the 5th triode Q5, the collector electrode of the 3rd triode Q3 connects 1 pin of piezoelectric element PZT, the emitter of the 3rd triode Q3 connects 1 pin of inductance L.
Positive extreme value testing circuit reaching after forward maximum voltage point at piezoelectric element PZT voltage, the first capacitor C 1 voltage is constant, and piezoelectric element 1 pin voltage drop, drop to the 5th triode Q5 conducting after positive-negative-positive the 5th triode Q5 threshold voltage, transmit high level control the 3rd triode Q3 conducting of the first capacitor C 1, make inductance L and piezoelectric element internal capacitance Cp produce LC resonance, piezoelectric energy is synchronously extracted to inductance L, and by the 3rd triode and the 5th triode, the electric energy of the first capacitor C 1 is also extracted to inductance L.And by the first diode D1 afterflow, energy is transferred on storage capacitor Cr.
Negative pole value testing circuit is by the 3rd diode D3, the second capacitor C 2, positive-negative-positive the 6th triode Q6 forms, 2 pin of piezoelectric element connect the anode of the 3rd diode D3, the negative terminal end of the 3rd diode D3 connects the anode of the second capacitor C 2, the negative terminal of the second capacitor C 2 connects 1 pin of piezoelectric element PZT, the negative terminal of the 3rd diode D3 connects the emitter of positive-negative-positive the 6th triode Q6, the anode of the 3rd diode D3 connects the base stage of positive-negative-positive the 6th triode Q6, the 4th switch S 4 is controlled in the collector electrode output of positive-negative-positive the 6th triode Q6, NPN type the 4th triode Q4 forms the 4th switch S 4, the base stage of the 4th triode Q4 connects the collector electrode of the 6th triode Q6, the collector electrode of the 4th triode Q4 connects 2 pin of piezoelectric element PZT, the emitter of the 4th triode Q4 connects 1 pin of inductance L.
Negative pole value testing circuit reaches after reverse maximum voltage point piezoelectric element PZT voltage, the second capacitor C 2 voltages are constant, and piezoelectric element 2 pin voltage drops, drop to the 6th triode Q6 conducting after positive-negative-positive the 6th triode Q6 threshold voltage, transmit high level control the 4th triode Q4 conducting of the second capacitor C 2, make inductance L and piezoelectric element internal capacitance Cp produce LC resonance, piezoelectric energy is synchronously extracted to inductance L, and by the 4th triode Q4 and the 6th triode Q6, the electric energy of the second capacitor C 2 is also extracted to inductance L.And by the first diode D1 afterflow, energy is transferred on storage capacitor Cr.
In positive and negative extreme value testing circuit, because the base current of triode will be much smaller than the electric current of collector electrode, so electric capacity (C1, the C2) velocity of discharge that extreme value detects is slower than piezoelectric element internal capacitance, thereby due to guaranteed to extract switching tube in circuit continue be conducting to, the structure of this circuit has guaranteed that extreme value detects the energy of a charge that electric capacity accumulates and is also extracted to inductance from same circuit, thereby reduce circuit oneself power consumption, improved the conversion efficiency of energy.
Claims (3)
1. a self-powered piezoelectric vibration energy synchronous extraction circuit, comprises piezoelectric element (PZT), positive-negative half-cycle detects interlocking control circuit, positive extreme value testing circuit, negative pole value testing circuit, inductance (L), the first diode (D1), storage capacitor (Cr), load resistance (RL), first, second, the 3rd, the 4th switch (S1, S2, S3, S4), it is characterized in that: 1 pin of piezoelectric element (PZT) and positive-negative half-cycle detect a end of interlocking control circuit automatically, positive extreme value detection trigger circuit anode, the negative terminal of negative pole value detection trigger circuit is connected, and 2 pin of piezoelectric element (PZT) and positive-negative half-cycle detect the b end of interlocking control circuit automatically, positive extreme value detection trigger circuit negative terminal, the anode of negative pole value detection trigger circuit is connected, and 1 pin of piezoelectric element (PZT) and positive-negative half-cycle detect the first switch (S1) that interlocking is controlled automatically, one end of the 3rd switch (S3) of positive extreme value detection trigger circuit control is connected, and 2 pin of piezoelectric element (PZT) and positive-negative half-cycle detect the second switch (S2) that interlocking is controlled automatically, one end of the 4th switch (S4) of negative pole value detection trigger circuit control is connected, after the other end of the first switch (S1) and second switch (S2) is interconnected, be connected with 2 pin of inductance (L), after the other end of the 3rd switch (S3) and the 4th switch (S4) is interconnected, be connected with 1 pin of inductance (L), 2 pin of inductance (L) are connected with the anode of the first diode (D1), 1 pin of inductance (L) is connected with Circuits System output ground (GND), the negative terminal of the first diode (D1) is connected with storage capacitor (Cr) anode, storage capacitor (Cr) anode is connected with system load (RL) and output dc voltage (Vdc), and storage capacitor (Cr) is all connected with circuit output ground (GND) with the negative terminal of load (RL).
2. the self-powered piezoelectric vibration energy synchronous extraction circuit of one according to claim 1, it is characterized in that: two NMOS field effect transistor first field effect transistor (Q1) of interlocking form positive-negative half-cycle with the second field effect transistor (Q2) and detect interlocking control circuit and the first switch (S1), second switch (S2) circuit, the first field effect transistor (Q1) is connected with the source electrode of the second field effect transistor (Q2) and is connected with 2 pin of inductance, the grid of the first field effect transistor (Q1) is connected with the drain electrode of the second field effect transistor (Q2), the grid of the second field effect transistor (Q2) is connected with the drain electrode of the first field effect transistor (Q1).
3. the self-powered piezoelectric vibration energy synchronous extraction circuit of one according to claim 1, it is characterized in that: positive extreme value testing circuit is by the second diode (D2), the first electric capacity (C1), positive-negative-positive the 5th triode (Q5) forms, 1 pin of piezoelectric element connects the anode of the second diode (D2), the negative terminal end of the second diode (D2) connects the anode of the first electric capacity (C1), the negative terminal of the first electric capacity (C1) connects 2 pin of piezoelectric element (PZT), the negative terminal of the second diode (D2) connects the emitter of positive-negative-positive the 5th triode (Q5), the anode of the second diode (D2) connects the base stage of positive-negative-positive the 5th triode (Q5), the 3rd switch (S3) is controlled in the collector electrode output of positive-negative-positive the 5th triode (Q5), NPN type the 3rd triode (Q3) forms the 3rd switch (S3), the base stage of the 3rd triode (Q3) connects the collector electrode of the 5th triode (Q5), the collector electrode of the 3rd triode (Q3) connects 1 pin of piezoelectric element (PZT), the emitter of the 3rd triode (Q3) connects 1 pin of inductance (L), negative pole value testing circuit is by the 3rd diode (D3), the second electric capacity (C2), positive-negative-positive the 6th triode (Q6) forms, 2 pin of piezoelectric element connect the anode of the 3rd diode (D3), the negative terminal end of the 3rd diode (D3) connects the anode of the second electric capacity (C2), the negative terminal of the second electric capacity (C2) connects 1 pin of piezoelectric element (PZT), the negative terminal of the 3rd diode (D3) connects the emitter of positive-negative-positive the 6th triode (Q6), the anode of the 3rd diode (D3) connects the base stage of positive-negative-positive the 6th triode (Q6), the 4th switch (S4) is controlled in the collector electrode output of positive-negative-positive the 6th triode (Q6), NPN type the 4th triode (Q4) forms the 4th switch (S4), the base stage of the 4th triode (Q4) connects the collector electrode of the 6th triode (Q6), the collector electrode of the 4th triode (Q4) connects 2 pin of piezoelectric element (PZT), the emitter of the 4th triode (Q4) connects 1 pin of inductance (L).
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109787334A (en) * | 2019-02-20 | 2019-05-21 | 上海交通大学 | A kind of nonlinear Control managing device of piezoelectric energy acquisition |
| CN111064388A (en) * | 2020-01-07 | 2020-04-24 | 宁波大学 | Multi-piezoelectric combined energy acquisition circuit |
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| CN107171593A (en) * | 2017-06-12 | 2017-09-15 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Vibrational energy Acquisition Circuit |
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| CN107508490B (en) * | 2017-07-25 | 2019-05-07 | 中山大学 | A kind of piezoelectric vibration energy extraction circuit |
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| CN108258811B (en) * | 2018-01-29 | 2023-09-08 | 宁波大学 | Composite energy acquisition circuit |
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| CN108390462B (en) * | 2018-05-09 | 2023-09-08 | 宁波大学 | Self-powered piezoelectric vibration energy synchronous extraction circuit |
| CN109004862A (en) * | 2018-08-02 | 2018-12-14 | 湖南工业大学 | A kind of low latency self-powered piezo-electric generating synchronization charge-extraction circuit |
| CN109217446B (en) * | 2018-10-17 | 2024-04-16 | 宁波大学 | Piezoelectric vibration energy acquisition circuit |
| CN109787334A (en) * | 2019-02-20 | 2019-05-21 | 上海交通大学 | A kind of nonlinear Control managing device of piezoelectric energy acquisition |
| CN111064388A (en) * | 2020-01-07 | 2020-04-24 | 宁波大学 | Multi-piezoelectric combined energy acquisition circuit |
| CN111064388B (en) * | 2020-01-07 | 2023-01-13 | 宁波大学 | Multi-piezoelectric combined energy acquisition circuit |
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