CN112072955A - Piezoelectric vibration energy acquisition circuit - Google Patents
Piezoelectric vibration energy acquisition circuit Download PDFInfo
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- CN112072955A CN112072955A CN202010744605.7A CN202010744605A CN112072955A CN 112072955 A CN112072955 A CN 112072955A CN 202010744605 A CN202010744605 A CN 202010744605A CN 112072955 A CN112072955 A CN 112072955A
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- 239000003990 capacitor Substances 0.000 claims abstract description 45
- 238000001514 detection method Methods 0.000 claims abstract description 36
- 238000004146 energy storage Methods 0.000 claims abstract description 18
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract 2
- 150000004706 metal oxides Chemical class 0.000 claims abstract 2
- 239000004065 semiconductor Substances 0.000 claims abstract 2
- 238000003306 harvesting Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 6
- 230000001360 synchronised effect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000003071 parasitic effect Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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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
- H02N2/186—Vibration harvesters
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Abstract
The invention discloses a piezoelectric vibration energy acquisition circuit which is characterized by comprising a positive peak value detection module, a negative peak value detection module, a piezoelectric plate, an inductor, a first diode, a PMOS (P-channel metal oxide semiconductor) tube, an energy storage capacitor and a load, wherein one end of the piezoelectric plate, the positive electrode of the positive peak value detection module, the negative electrode of the negative peak value detection module and the grid electrode of the PMOS tube are connected, the other end of the piezoelectric plate, the negative electrode of the positive peak value detection module, one end of the inductor, the positive electrode of the negative peak value detection module and the drain electrode of the PMOS tube are connected, the output end of the positive peak value detection module, the output end of the negative peak value detection module, the other end of the inductor and the positive electrode of the first diode are connected, the negative electrode of the first diode, the positive electrode of the energy storage capacitor and one end of the load are connected, and; the synchronous charge extraction circuit has the advantages that through the combination of the bias turning technology and the synchronous charge extraction circuit, the influence of the load on the output power is reduced, and the energy collection efficiency is effectively improved.
Description
Technical Field
The invention relates to an energy acquisition circuit structure, in particular to a piezoelectric vibration energy acquisition circuit.
Background
The piezoelectric vibration energy collection is a method for collecting vibration energy in the environment by utilizing the piezoelectric effect of a piezoelectric material, and because the output voltage of a piezoelectric piece is an alternating current signal and general electronic equipment is powered by a direct current power supply, an interface circuit is needed between the piezoelectric piece and the electronic equipment, and the conversion from the alternating current voltage to the direct current voltage is realized through the interface circuit.
The existing circuit design generally adopts a method of fusing a bias turning technology and a series synchronous switch inductance circuit, but the output power of the series synchronous switch inductance circuit is greatly influenced by a load, so that the efficiency of energy collection is low.
Disclosure of Invention
The invention aims to provide a piezoelectric vibration energy acquisition circuit with high energy acquisition efficiency, and the influence of a load on output power can be reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows: a piezoelectric vibration energy acquisition circuit comprises a positive peak value detection module, a negative peak value detection module, a piezoelectric plate, an inductor, a first diode, a PMOS tube, an energy storage capacitor and a load, one end of the piezoelectric sheet, the anode of the positive peak value detection module, the cathode of the negative peak value detection module and the grid of the PMOS tube are connected, the other end of the piezoelectric sheet, the negative electrode of the positive peak value detection module, one end of the inductor, the positive electrode of the negative peak value detection module and the drain electrode of the PMOS tube are connected, the output end of the positive peak value detection module, the output end of the negative peak value detection module, the other end of the inductor and the anode of the first diode are connected, the cathode of the first diode, the anode of the energy storage capacitor and one end of the load are connected, the source electrode of the PMOS tube, the negative electrode of the energy storage capacitor and the other end of the load are all grounded.
The positive peak detection module comprises a first PNP tube, a first NPN tube, a second diode and a first capacitor, the negative peak detection module comprises a second PNP tube, a second NPN tube, a third diode and a second capacitor, one end of a piezoelectric sheet, one end of the second capacitor, an emitter of the second NPN tube, a collector of the first NPN tube, a base of the first PNP tube and an anode of the second diode are connected, the other end of the piezoelectric sheet, an anode of the third diode, a base of the second PNP tube and one end of the first capacitor are connected, the other end of the second capacitor, a cathode of the third diode and an emitter of the second PNP tube are connected, a collector of the second PNP tube is connected with the base of the second PNP tube, a collector of the second NPN tube, a third diode and an emitter of the second diode are connected, The positive electrode of the first diode is connected with the emitting electrode of the first NPN tube, the base electrode of the first NPN tube is connected with the collector electrode of the first PNP tube, and the emitting electrode of the first PNP tube, the negative electrode of the second diode and the other end of the first capacitor are connected. One end of the piezoelectric sheet is used as a 1 st pin, the other end of the piezoelectric sheet is used as a 2 nd pin, in a positive half period, the voltage on the 1 st pin of the piezoelectric sheet is higher than the voltage on the 2 nd pin, at the moment, the PMOS tube is turned off, when the voltages at the two ends of the piezoelectric sheet reach a peak value, the first NPN tube is conducted, so that the inductor and the piezoelectric sheet form a loop, and after 1/2 LC oscillation periods, the charges accumulated on the parasitic capacitor in the piezoelectric sheet are turned over through the inductor; in a negative half period, the voltage on the 1 st pin of the piezoelectric plate is lower than the voltage on the 2 nd pin, the PMOS tube is conducted at the moment, when the voltages at the two ends of the piezoelectric plate reach peak values, the second NPN tube is conducted, so that the inductor and the piezoelectric plate form a loop, after 1/4 LC oscillation periods, the charges accumulated on the parasitic capacitor inside the piezoelectric plate are transferred to the inductor, and the conversion from electric energy to magnetic energy is completed, after the charge transfer is completed, the current on the inductor reaches the maximum value, and as the charges on the parasitic capacitor inside the piezoelectric plate are all released, the voltages at the two ends of the piezoelectric plate are reduced to zero, so that the second NPN tube is turned off, namely the original loop is turned off, at the moment, the inductor, the first diode, the energy storage capacitor and the load form a loop, the current on the inductor flows to the energy storage capacitor and the load through the first diode, thereby achieving piezoelectric vibration energy extraction.
Compared with the prior art, the invention has the advantages that in the positive half period, the piezoelectric sheet and the inductor form a loop, the charges accumulated on the parasitic capacitor in the piezoelectric sheet are turned over through the inductor after 1/2 LC oscillation periods, in the negative half period, the inductor and the piezoelectric sheet form a loop, after 1/4 LC oscillation periods, the charges accumulated on the parasitic capacitor in the piezoelectric sheet are transferred to the inductor, the conversion from electric energy to magnetic energy is completed, after the charge transfer is completed, the current on the inductor reaches the maximum value, because the charges on the parasitic capacitor in the piezoelectric sheet are all released, the voltage at two ends of the piezoelectric sheet is reduced to zero, the current on the inductor flows to the energy storage capacitor and the load through the first diode, the conversion from the magnetic energy to the electric energy is completed, thereby realizing the extraction of the piezoelectric vibration energy, and through the fusion of a bias turning technology and a synchronous charge extraction circuit, the influence of the load on the output power is reduced, and the energy collection efficiency is effectively improved.
Drawings
FIG. 1 is a schematic diagram of the circuit configuration of the present invention;
fig. 2 is a specific circuit configuration diagram of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1, a piezoelectric vibration energy collecting circuit includes a positive peak value detecting module U1, a negative peak value detecting module U2, a piezoelectric patch U3, an inductor L, a first diode D1, a PMOS transistor P, an energy storage capacitor CL and a load RL, one end of the piezoelectric patch U3, and the positive electrode of the positive peak value detecting module U1, the negative electrode of the negative peak value detection module U2 is connected with the gate of the PMOS tube P, the other end of the piezoelectric plate U3, the negative electrode of the positive peak value detection module U1, one end of the inductor L, the positive electrode of the negative peak value detection module U2 and the drain of the PMOS tube P are connected, the output end of the positive peak value detection module U1, the output end of the negative peak value detection module U2, the other end of the inductor L and the positive electrode of the first diode D1 are connected, the negative electrode of the first diode D1, the positive electrode of the energy storage capacitor CL and one end of the load RL are connected, and the source electrode of the PMOS tube P, the negative electrode of the energy storage capacitor CL and the other end of the load RL.
As shown in fig. 2, the positive peak detection module U1 includes a first PNP transistor Q1, a first NPN transistor Q2, a second diode D2 and a first capacitor C1, the negative peak detection module U2 includes a second PNP transistor Q3, a second NPN transistor Q4, a third diode D3 and a second capacitor C2, one end of the piezoelectric sheet U3, one end of the second capacitor C2, the emitter of the second NPN transistor Q4, the collector of the first NPN transistor Q2, the base of the first PNP transistor Q1, the anode of the second diode D2 and the gate of the PMOS transistor P are connected, the other end of the piezoelectric sheet U3, the anode of the third diode D3, the base of the second PNP transistor Q3, one end of the inductor L, one end of the first capacitor C6867 and the drain of the PMOS transistor P are connected, the other end of the base of the second capacitor C2, the cathode of the third diode D3 and the collector of the second PNP transistor Q3 are connected, the collector 3 of the second PNP transistor Q3 is connected to the emitter 3, and the collector 3 of the second PNP transistor Q3 is connected to the collector 3, The emitter of the first NPN transistor Q2, the other end of the inductor L and the anode of the first diode D1 are connected, the base of the first NPN transistor Q2 is connected to the collector of the first PNP transistor Q1, the emitter of the first PNP transistor Q1, the cathode of the second diode D2 and the other end of the first capacitor C1 are connected, the cathode of the first diode D1, the anode of the energy storage capacitor CL and one end of the load RL are connected, and the source of the PMOS transistor P, the cathode of the energy storage capacitor CL and the other end of the load RL are all grounded.
The working principle of the above embodiment is as follows:
one end of the piezoelectric patch U3 is used as a 1 st pin, the other end of the piezoelectric patch U3 is used as a 2 nd pin, in a positive half period, the voltage on the 1 st pin of the piezoelectric patch U3 is higher than that on the 2 nd pin, at the moment, the PMOS tube P is turned off, when the voltages at the two ends of the piezoelectric patch U3 reach a peak value, the first NPN tube Q2 is turned on, so that the inductor L and the piezoelectric patch U3 form a loop, and after 1/2 LC oscillation periods, charges accumulated on a parasitic capacitor in the piezoelectric patch U3 are turned over through the inductor L;
in a negative half period, the voltage on the 1 st pin of the piezoelectric sheet U3 is lower than the voltage on the 2 nd pin, at this time, the PMOS transistor P is turned on, when the voltage at the two ends of the piezoelectric sheet U3 reaches a peak value, the second NPN transistor Q4 is turned on, so that the inductor L and the piezoelectric sheet U3 form a loop, after 1/4 LC oscillation cycles, the charges accumulated on the parasitic capacitor inside the piezoelectric sheet U3 are transferred to the inductor L, and at the same time, the conversion from electric energy to magnetic energy is completed, after the charge transfer is completed, the current on the inductor L reaches a maximum value, since the charges on the parasitic capacitor inside the piezoelectric sheet U3 are all released, the voltage at the two ends of the piezoelectric sheet U3 drops to zero, so that the second NPN transistor Q4 is turned off, that the original loop is turned off, at this time, the inductor L, the first diode D1, the energy storage capacitor CL and the load RL form a loop, and the current on the inductor L flows to the energy storage capacitor, conversion of magnetic energy into electric energy is completed, and therefore piezoelectric vibration energy extraction is achieved.
Claims (2)
1. A piezoelectric vibration energy acquisition circuit is characterized by comprising a positive peak detection module, a negative peak detection module, a piezoelectric plate, an inductor, a first diode, a PMOS (P-channel metal oxide semiconductor) tube, an energy storage capacitor and a load, wherein one end of the piezoelectric plate, the positive electrode of the positive peak detection module, the negative electrode of the negative peak detection module and the grid electrode of the PMOS tube are connected, the other end of the piezoelectric plate, the negative electrode of the positive peak detection module, one end of the inductor, the positive electrode of the negative peak detection module and the drain electrode of the PMOS tube are connected, the output end of the positive peak detection module, the output end of the negative peak detection module, the other end of the inductor and the positive electrode of the first diode are connected, the negative electrode of the first diode, the positive electrode of the energy storage capacitor and one end of the load are connected, and the source electrode of the PMOS tube, the negative electrode of the positive peak detection module, the, The negative electrode of the energy storage capacitor and the other end of the load are both grounded.
2. A piezoelectric vibration energy harvesting circuit according to claim 1, wherein the positive peak detection module includes a first PNP transistor, a first NPN transistor, a second diode, and a first capacitor, the negative peak detection module includes a second PNP transistor, a second NPN transistor, a third diode, and a second capacitor, one end of the piezoelectric plate, one end of the second capacitor, an emitter of the second NPN transistor, a collector of the first NPN transistor, a base of the first PNP transistor, and an anode of the second diode are connected, the other end of the piezoelectric plate, an anode of the third diode, a base of the second PNP transistor, and one end of the first capacitor are connected, the other end of the second capacitor, a cathode of the third diode, and an emitter of the second PNP transistor are connected, a collector of the second PNP transistor is connected to a base of the second NPN transistor, the collector of the second NPN tube, the anode of the first diode and the emitter of the first NPN tube are connected, the base of the first NPN tube is connected with the collector of the first PNP tube, and the emitter of the first PNP tube, the cathode of the second diode and the other end of the first capacitor are connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010744605.7A CN112072955B (en) | 2020-07-29 | 2020-07-29 | Piezoelectric vibration energy acquisition circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010744605.7A CN112072955B (en) | 2020-07-29 | 2020-07-29 | Piezoelectric vibration energy acquisition circuit |
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| CN112072955A true CN112072955A (en) | 2020-12-11 |
| CN112072955B CN112072955B (en) | 2024-02-06 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140211523A1 (en) * | 2011-10-07 | 2014-07-31 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Peak detector with improved false peak rejection |
| CN105634300A (en) * | 2016-01-21 | 2016-06-01 | 湖南大学 | Piezoelectric energy collection rectifier for open-circuit type optimization of turnover time |
| CN108233766A (en) * | 2018-01-29 | 2018-06-29 | 宁波大学 | A kind of energy composite energy Acquisition Circuit |
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2020
- 2020-07-29 CN CN202010744605.7A patent/CN112072955B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140211523A1 (en) * | 2011-10-07 | 2014-07-31 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Peak detector with improved false peak rejection |
| CN105634300A (en) * | 2016-01-21 | 2016-06-01 | 湖南大学 | Piezoelectric energy collection rectifier for open-circuit type optimization of turnover time |
| CN108233766A (en) * | 2018-01-29 | 2018-06-29 | 宁波大学 | A kind of energy composite energy Acquisition Circuit |
Non-Patent Citations (1)
| Title |
|---|
| 王博;韦保林;周峰;韦雪明;徐卫林;段吉海;: "一种具有快速输出响应的峰值检测器", 微电子学, no. 04 * |
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| CN112072955B (en) | 2024-02-06 |
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