CN208257509U - A kind of self-powered piezoelectric type vibration synchronous energy extraction circuit - Google Patents

Abstract

The utility model discloses a kind of self-powered piezoelectric type vibration synchronous energies to extract circuit, feature be include piezoelectric element, thermoelectric generation film, first storage capacitor, thermoelectricity injection detection control circuit, positive extreme value detection circuit, cathode value detection circuit, first inductance, second inductance, first diode, second diode, first NMOS tube, 4th NMOS tube, 5th NMOS tube, first NPN type triode, second NPN type triode, second storage capacitor and load resistance, thermoelectricity injection detection control circuit includes the second NMOS tube, third NMOS tube, first capacitor, second capacitor, third diode and the 4th diode；Advantage is to inject effectively to promote output power by thermoelectric energy, and realize complete self-powered.

Description

A kind of self-powered piezoelectric type vibration synchronous energy extraction circuit

Technical field

The utility model relates to a kind of Energy extraction circuit, especially a kind of self-powered piezoelectric type vibration synchronous energy is mentioned Sense circuit.

Background technique

With the continuous development of smart electronics, technology of wireless sensing network also gradually applies to every field, such as cures Treat health care, environmental monitoring, household safety-protection etc..However the performance of battery and service life seriously restrict the universal of wireless sensing node, In the wireless sensing node of some environmental monitorings and health care, once power depletion, information collection stops, entire node Just do not work.

In order to obtain more energy from environment, the gross energy of acquisition is improved, has researcher to propose multi-source Energy-collecting method, from energy resource collectings energy such as vibrational energy, thermal energy, microwave radiations in environment, but since different energy sources produce Raw signal is entirely different, and different signals cannot be directly coupled together, so general multi-source energy collecting system is Independent collection simply is carried out to the energy of diversified forms.And the control switch circuit of multiple kinds of energy acquisition system is very multiple It is miscellaneous, do not propose more perfect self-powered solution also so far.

Summary of the invention

The technical problem to be solved by the utility model is to provide a kind of injected by thermoelectric energy effectively to promote output work The self-powered piezoelectric type vibration synchronous energy of rate extracts circuit.

Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of self-powered piezoelectric type vibration energy Measure synchronous extraction circuit, including piezoelectric element, thermoelectric generation film, the first storage capacitor, thermoelectricity injection detection control circuit, anode Be worth detection circuit, cathode value detection circuit, the first inductance, the second inductance, first diode, the second diode, the first NMOS tube, 4th NMOS tube, the 5th NMOS tube, the first NPN type triode, the second NPN type triode, the second storage capacitor and load resistance, The thermoelectricity injection detection control circuit includes the second NMOS tube, third NMOS tube, first capacitor, the second capacitor, the three or two Pole pipe and the 4th diode, one end of the first positive, described inductance of the thermoelectric generation film and first energy storage The anode of capacitor is connected, the cathode of the thermoelectric generation film, the cathode of first storage capacitor, the first NMOS The source electrode of pipe, one end of the first capacitor, the source electrode of second NMOS tube, one end of second inductance, institute The source electrode of the 4th positive, described NMOS tube for the second diode stated and the source electrode connection of the 5th NMOS tube, it is described The other end of the first inductance, the anode of the first diode and first NMOS tube drain electrode connection, it is described The grid of first NMOS tube, the other end of the first capacitor, the third diode cathode and described second The drain electrode of NMOS tube connects, the cathode of the first diode, the grid of second NMOS tube, the piezoelectric element One end, one end of second capacitor, the negative terminal of the positive extreme value detection circuit, the cathode value detection circuit Anode, the collector of second NPN type triode, the grid of the 4th NMOS tube and the 5th NMOS tube The anode of drain electrode connection, the third diode is connect with the drain electrode of the third NMOS tube, the third NMOS tube Source electrode, second capacitor the other end and the 4th diode cathode connection, the third NMOS tube Grid, the other end of positive, described piezoelectric element of the 4th diode, the drain electrode of the 4th NMOS tube, institute The grid for the 5th NMOS tube stated, the anode of the positive extreme value detection circuit, the cathode value detection circuit negative terminal and The collector of first NPN type triode connects, the control terminal of the positive extreme value detection circuit and the first NPN The base stage of type triode connects, the base stage of the control terminal of the cathode value detection circuit and second NPN type triode One end of connection, the cathode of second diode, the anode of second storage capacitor and the load resistance connects It connects, the emitter of first NPN type triode, the emitter of second NPN type triode, second inductance The other end, the cathode of second storage capacitor and the other end of the load resistance be grounded.

The positive extreme value detection circuit includes third capacitor, the 5th diode and the first PNP type triode, and described is negative Extremum extracting circuit includes the 4th capacitor, the 6th diode and the second PNP type triode, one end of the third capacitor, institute The base stage of the one end for the piezoelectric element stated, the anode of the 6th diode and second PNP type triode connects, institute The emitter of the other end for the third capacitor stated, the cathode of the 5th diode and first PNP type triode connects Connect, the base stage of the first positive, described PNP type triode of the 5th diode, one end of the 4th capacitor and The other end of the piezoelectric element connects, the collector of first PNP type triode and three pole of the first NPN type The base stage of pipe connects, the other end of the 4th capacitor, the cathode of the 6th diode and second positive-negative-positive three The emitter of pole pipe connects, and the base stage of the collector of second PNP type triode and second NPN type triode connects It connects.

Compared with prior art, the utility model has the advantage of inject detection control circuit by thermoelectricity to detect piezoelectricity member The original state of part, then controls the first NMOS tube periodically by the Energy extraction in the first storage capacitor to the first inductance, And energy is injected into the internal capacitance of piezoelectric element by first diode afterflow, then pass through the 4th NMOS tube, the 5th The collective effect of NMOS tube, positive extreme value detection circuit and cathode value detection circuit keeps the inside of the second inductance and piezoelectric element electric Hold and generate LC resonance, extract inductance so that piezoelectric energy be synchronized, and transfers energy into the by the second diode continuousing flow On two storage capacitors；Entire circuit, which can automatically detect the original state of piezoelectric element and control each NMOS tube, carries out thermoelectric power Amount injection, is not necessarily to external power supply, greatly reduces circuit power consumption and promote output power, and realizes complete self-powered；It compares In the circuit of no thermoelectric energy injection, the few thermoelectric energy of thermoelectric generation film by being located at front end injects, rear end it is defeated Power can obtain several times of promotion out, and output power is unrelated with payload size, and in wider vibration frequency range It uses.

Detailed description of the invention

Fig. 1 is the circuit structure diagram of the utility model.

Specific embodiment

The utility model is described in further detail below in conjunction with figure embodiment.

Embodiment one: a kind of self-powered piezoelectric type vibration synchronous energy extraction circuit, including piezoelectric element PZT, the temperature difference Power generation sheet TEG, the first storage capacitor Cin, thermoelectricity injection detection control circuit, positive extreme value detection circuit, cathode value detection circuit, First inductance L1, the second inductance L2, first diode D1, the second diode D2, the first NMOS tube M1, the 4th NMOS tube M4, Five NMOS tube M5, the first NPN type triode Q2, the second NPN type triode Q3, the second storage capacitor Cr and load resistance RL, heat It includes the second NMOS tube M2, third NMOS tube M3, first capacitor C1, the second capacitor C2, the three or two that electrical pumping, which detects control circuit, Pole pipe D3 and the 4th diode D4, the anode of thermoelectric generation film TEG, one end of the first inductance L1 and the first storage capacitor Cin Anode is connected, the cathode of thermoelectric generation film TEG, the cathode of the first storage capacitor Cin, the source electrode of the first NMOS tube M1, the first electricity Hold one end of C1, the source electrode of the second NMOS tube M2, one end of the second inductance L2, the anode of the second diode D2, the 4th NMOS tube The connection of the source electrode of the source electrode of M4 and the 5th NMOS tube M5, the anode and first of the other end of the first inductance L1, first diode D1 The drain electrode of NMOS tube M1 connects, the grid of the first NMOS tube M1, the other end of first capacitor C1, third diode D3 cathode and The drain electrode of second NMOS tube M2 connects, the cathode of first diode D1, the grid of the second NMOS tube M2, piezoelectric element PZT one End, one end of the second capacitor C2, the negative terminal of positive extreme value detection circuit, the anode of cathode value detection circuit, the second NPN type triode The drain electrode of the collector of Q3, the grid of the 4th NMOS tube M4 and the 5th NMOS tube M5 connects, the anode of third diode D3 and the The drain electrode of three NMOS tube M3 connects, the source electrode of third NMOS tube M3, the other end of the second capacitor C2 and the 4th diode D4 it is negative Pole connection, grid, the anode of the 4th diode D4, the other end of piezoelectric element PZT, the 4th NMOS tube M4 of third NMOS tube M3 Drain electrode, the grid of the 5th NMOS tube M5, the anode of positive extreme value detection circuit, cathode value detection circuit negative terminal and the first NPN The collector of type triode Q2 connects, and the control terminal of positive extreme value detection circuit is connect with the base stage of the first NPN type triode Q2, bears The control terminal of extremum extracting circuit is connect with the base stage of the second NPN type triode Q3, the cathode of the second diode D2, the second energy storage One end connection of the anode and load resistance RL of capacitor Cr, the emitter of the first NPN type triode Q2, the second NPN type triode The emitter of Q3, the other end of the second inductance L2, the cathode of the second storage capacitor Cr and load resistance RL the other end be grounded.

Embodiment two: rest part is the same as example 1, the difference is that positive extreme value detection circuit includes third Capacitor C3, the 5th diode D5 and the first PNP type triode Q1, cathode value detection circuit include the 4th capacitor C4, the six or two pole Pipe D6 and the second PNP type triode Q4, one end of third capacitor C3, one end of piezoelectric element PZT, the 6th diode D6 anode And second PNP type triode Q4 base stage connection, the cathode and the first PNP of the other end of third capacitor C3, the 5th diode D5 The emitter of type triode Q1 connects, the anode of the 5th diode D5, the base stage of the first PNP type triode Q1, the 4th capacitor C4 One end and piezoelectric element PZT other end connection, the collector of the first PNP type triode Q1 and the first NPN type triode Q2 Base stage connection, the emitter of the other end of the 4th capacitor C4, the cathode of the 6th diode D6 and the second PNP type triode Q4 connects It connects, the collector of the second PNP type triode Q4 is connect with the base stage of the second NPN type triode Q3.

Claims (2)

1. a kind of self-powered piezoelectric type vibration synchronous energy extracts circuit, it is characterised in that including piezoelectric element, thermo-electric generation Piece, the first storage capacitor, thermoelectricity injection detection control circuit, positive extreme value detection circuit, cathode value detection circuit, the first inductance, Second inductance, first diode, the second diode, the first NMOS tube, the 4th NMOS tube, the 5th NMOS tube, three pole of the first NPN type Pipe, the second NPN type triode, the second storage capacitor and load resistance, the thermoelectricity injection detection control circuit includes second NMOS tube, third NMOS tube, first capacitor, the second capacitor, third diode and the 4th diode, the thermoelectric generation film The anode of one end of the first positive, described inductance and first storage capacitor is connected, and the thermoelectric generation film is born Pole, the cathode of first storage capacitor, the source electrode of first NMOS tube, the first capacitor one end, described The source electrode of the second NMOS tube, one end of second inductance, second diode the 4th positive, described NMOS The source electrode of pipe and the connection of the source electrode of the 5th NMOS tube, the other end of first inductance, the first diode Anode and first NMOS tube drain electrode connection, the grid of first NMOS tube, the first capacitor it is another The drain electrode of one end, the cathode of the third diode and second NMOS tube connects, and the first diode is born Pole, the grid of second NMOS tube, one end of the piezoelectric element, second capacitor one end, it is described just The negative terminal of extremum extracting circuit, the anode of the cathode value detection circuit, second NPN type triode collector, The grid of 4th NMOS tube and the drain electrode connection of the 5th NMOS tube, the anode of the third diode and institute The drain electrode of the third NMOS tube stated connects, the source electrode of the third NMOS tube, the other end of second capacitor and described The 4th diode cathode connection, positive, described pressure of the grid of the third NMOS tube, the 4th diode The other end of electric device, the drain electrode of the 4th NMOS tube, the grid of the 5th NMOS tube, the positive extremum extracting The collector of the anode of circuit, the negative terminal of the cathode value detection circuit and first NPN type triode connects, described The control terminal of positive extreme value detection circuit connect with the base stage of first NPN type triode, the negative extremum extracting electricity The control terminal on road is connect with the base stage of second NPN type triode, the cathode of second diode, described second The connection of one end of the anode of storage capacitor and the load resistance, it is the emitter of first NPN type triode, described The emitter of second NPN type triode, the other end of second inductance, the cathode of second storage capacitor and described The other end of load resistance be grounded.

2. a kind of self-powered piezoelectric type vibration synchronous energy according to claim 1 extracts circuit, it is characterised in that institute The positive extreme value detection circuit stated includes third capacitor, the 5th diode and the first PNP type triode, the negative extremum extracting electricity Road includes the 4th capacitor, the 6th diode and the second PNP type triode, one end of the third capacitor, the piezoelectricity member The base stage of one end of part, the anode of the 6th diode and second PNP type triode connects, the third electricity The emitter of the other end of appearance, the cathode of the 5th diode and first PNP type triode connects, and described the The base stage of the first positive, described PNP type triode of five diodes, one end of the 4th capacitor and the piezoelectricity member The other end of part connects, and the base stage of the collector of first PNP type triode and first NPN type triode connects It connects, the other end, the cathode of the 6th diode and the transmitting of second PNP type triode of the 4th capacitor Pole connection, the collector of second PNP type triode are connect with the base stage of second NPN type triode.