CN210608656U - Scalable multi-source environment energy capture interface circuit based on single inductor - Google Patents
Scalable multi-source environment energy capture interface circuit based on single inductor Download PDFInfo
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- CN210608656U CN210608656U CN201920687058.6U CN201920687058U CN210608656U CN 210608656 U CN210608656 U CN 210608656U CN 201920687058 U CN201920687058 U CN 201920687058U CN 210608656 U CN210608656 U CN 210608656U
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Abstract
The utility model discloses an extensible multi-source environment energy capture interface circuit based on single inductance, which is characterized by comprising a first direct current source acquisition module, a second direct current source acquisition module, a third direct current source acquisition module, a plurality of fourth direct current source acquisition modules, piezoelectric energy acquisition modules, an inductance, a freewheeling diode, a first energy storage capacitor and a load, wherein the number of the piezoelectric energy acquisition modules corresponds to that of the fourth direct current source acquisition modules; the advantage is through setting up a plurality of pressure electric energy collection module and a plurality of direct current source collection module, can gather pressure electric energy and multiple direct current type energy that uses thermoelectric energy, light energy and even biofuel energy as the representative simultaneously, and whole circuit structure can superpose, and partial direct current source module can the high efficiency utilization many times, and whole circuit is self-powered completely, need not provide extra battery, has improved the efficiency of energy collection greatly.
Description
Technical Field
The utility model relates to an energy acquisition circuit specifically is an interface circuit is caught to multi-source environment energy that can expand based on single inductance.
Background
The environment is full of various energies, so that the energy in the environment can be captured by using a proper energy converter, and the captured energy is processed by an interface circuit, an energy management circuit and the like and then supplied to a wireless network node in the Internet of things to realize partial or even complete self-power supply, thereby prolonging the service life of the wireless network node.
At present, the common environmental energy capture circuit researches mainly include vibration energy, thermoelectric energy, light energy, microwave energy and other capture interface circuits. However, the current research mainly aims at optimizing a single-energy source and single-input interface circuit, such as a capture circuit based on piezoelectric vibration energy, and most of the current research aims at a device with a single cantilever beam structure, so that the energy collection efficiency is not high.
Disclosure of Invention
The utility model aims to solve the technical problem that an interface circuit is caught to multisource, environmental energy that can expand based on single inductance is provided to can use the alternating current type energy that piezoelectric vibration can be represented and the direct current type energy that uses thermoelectric energy of difference in temperature, light energy and even biofuel can be represented in order to collect.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a scalable multi-source environment energy capture interface circuit based on a single inductor comprises a first direct current source acquisition module, a second direct current source acquisition module, a third direct current source acquisition module, a plurality of fourth direct current source acquisition modules, piezoelectric energy acquisition modules, inductors, freewheeling diodes, a first energy storage capacitor and loads, wherein the piezoelectric energy acquisition modules correspond to the fourth direct current source acquisition modules in number, the positive end of the first direct current source acquisition module is connected with one end of the inductor, the other end of the inductor, the negative end of the second direct current source acquisition module and the negative end of each fourth direct current source acquisition module are connected, the positive end of each fourth direct current source acquisition module is connected with the negative end of the corresponding piezoelectric energy acquisition module, the positive end of each second direct current source acquisition module is connected with the anode of the freewheeling diode, and the cathode of the freewheeling diode is connected with the negative end of the third direct current source acquisition module, the positive end of the third direct current source acquisition module, one end of the first energy storage capacitor and one end of the load are connected, and the other end of the first energy storage capacitor, the other end of the load, the negative end of the first direct current source acquisition module and the positive end of the piezoelectric energy acquisition module are all grounded.
The piezoelectric energy collecting module comprises a piezoelectric sheet, a first PMOS tube, a second PMOS tube, a first capacitor, a first diode, a second diode, a first NPN tube, a first PNP tube, a second NPN tube and a second PNP tube, wherein the source electrode of the first PMOS tube is connected with the source electrode of the second PMOS tube and is used as the positive end of the piezoelectric energy collecting module, the drain electrode of the first PMOS tube, the grid electrode of the second PMOS tube, the pin 1 of the piezoelectric sheet, the cathode of the first diode, the base electrode of the first NPN tube and the collector electrode of the first PNP tube are connected, the drain electrode of the second PMOS tube, the grid electrode of the first PMOS tube, the pin 2 of the piezoelectric sheet, the cathode of the second piezoelectric diode, the base electrode of the second NPN tube and the collector electrode of the second PNP tube are connected, the anode of the first diode, the emitter electrode of the first diode and one end of the first capacitor are connected, the other end of the first capacitor, the anode of the second diode and the emitter of the second NPN tube are connected, the collector of the first NPN tube is connected to the base of the first PNP tube, the collector of the second NPN tube is connected to the base of the second PNP tube, and the emitter of the first PNP tube is connected to the emitter of the second PNP tube and serves as the negative end of the piezoelectric energy collection module.
The structure of the first direct current source acquisition module, the second direct current source acquisition module, the third direct current source acquisition module and the fourth direct current source acquisition module is the same, the first direct current source acquisition module comprises a direct current transducer and a second energy storage capacitor, pin 1 of the direct current transducer is connected with one end of the second energy storage capacitor and serves as the positive end of the first direct current source acquisition module, and pin 2 of the direct current transducer is connected with the other end of the second energy storage capacitor and serves as the negative end of the first direct current source acquisition module.
Compared with the prior art, the utility model has the advantages that by arranging a plurality of piezoelectric energy collecting modules and a plurality of direct current source collecting modules, piezoelectric energy and a plurality of direct current type energy sources represented by thermoelectric energy, optical energy and even biofuel energy can be collected simultaneously; the energy collection process is divided into three independent processes, firstly, in the process that the piezoelectric plate moves from the zero displacement point to the maximum displacement point, the parasitic capacitor in the piezoelectric plate is continuously charged, meanwhile, the direct current transducers in all the direct current source collection modules also charge the second energy storage capacitor, when the displacement of the piezoelectric plate reaches the maximum, the energy storage on the parasitic capacitor in the piezoelectric plate also reaches the maximum, at the moment, the first PNP tube or the second PNP tube in the piezoelectric energy collection module is conducted, so that the inductor, the first direct current source collection module, the piezoelectric energy collection module with the displacement reaching the maximum point of the piezoelectric plate and the fourth direct current source collection module connected in series with the piezoelectric energy collection module form an LC resonance loop, and after 1/4 LC resonance cycles, the energy in the fourth direct current source collection module and the piezoelectric energy collection module in the LC resonance loop is transferred to the inductor, at the moment, a first PNP tube or a second PNP tube in the piezoelectric energy acquisition module is immediately turned off, then a loop is formed by the first direct current source acquisition module, the inductor, the second direct current source acquisition module, the freewheeling diode, the third direct current source acquisition module and the first energy storage capacitor, and energy on the first direct current source acquisition module, the inductor, the second direct current source acquisition module and the third direct current source acquisition module is transferred to the first energy storage capacitor; the three processes are completely independent, and the direct current transducer and the load have no direct path, so that the efficiency of energy collection is not affected by load change, and the whole circuit structure can be superposed, namely, each direct current source collection module or each piezoelectric energy collection module can be increased or reduced according to the actual application scene, so as to be suitable for different application scenes.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention;
fig. 2 is a circuit structure diagram of the medium voltage electric energy collection module of the present invention;
fig. 3 is a circuit structure diagram of the first dc source collecting module of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
A scalable multi-source environmental energy capture interface circuit based on a single inductor L comprises a first direct current source acquisition module U1, a second direct current source acquisition module U2, a third direct current source acquisition module U3, a plurality of fourth direct current source acquisition modules U4, piezoelectric energy acquisition modules P1 corresponding to the fourth direct current source acquisition modules U4 in number, an inductor L, a freewheeling diode D, a first energy storage capacitor Cso and a load RL, wherein the positive end of the first direct current source acquisition module U1 is connected with one end of the inductor L, the other end of the inductor L, the negative end of the second direct current source acquisition module U2 and the negative end of each fourth direct current source acquisition module U4 are connected, the positive end of the fourth direct current source acquisition module U4 is connected with the negative end of the corresponding piezoelectric energy acquisition module P1, the freewheeling diode D is connected with the anode of the second direct current source acquisition module U2, and the cathode 3 of the third direct current source acquisition module D are connected with the acquisition module U3, the positive end of the third dc source acquisition module U3, one end of the first energy storage capacitor Csto, and one end of the load RL are connected, and the other end of the first energy storage capacitor Csto, the other end of the load RL, the negative end of the first dc source acquisition module U1, and the positive end of the piezoelectric energy acquisition module P1 are all grounded.
The piezoelectric energy collection module P1 comprises a piezoelectric plate PZT, a first PMOS tube PM1, a second PMOS tube PM2, a first capacitor C1, a first diode D1, a second diode D2, a first NPN tube Q1, a first PNP tube Q2, a second NPN tube Q3 and a second PNP tube Q4, wherein the source of the first PMOS tube PM1 is connected with the source of the second PMOS tube PM2 and serves as the positive end of the piezoelectric energy collection module P1, the drain of the first PMOS tube PM1, the gate of the second PMOS tube PM2, the pin 1 of the piezoelectric plate PZT, the cathode of the first diode D1, the base of the first NPN tube Q1 and the collector of the first PNP tube Q2 are connected, the drain of the second PMOS tube PM2, the gate of the first PMOS tube PM2, the pin 2 of the piezoelectric plate PZT, the cathode of the second diode D2, the gate of the second PMOS tube Q2 and the collector of the first PNP tube Q2 are connected with the emitter of the first NPN tube PM2, and the emitter of the first capacitor C2, and the emitter of the PNP tube PM2, and the other end of the PNP tube PM2 is connected with the anode 2 and the anode, An anode of the second diode D2 and an emitter of the second NPN tube Q3 are connected, a collector of the first NPN tube Q1 is connected to a base of the first PNP tube Q2, a collector of the second NPN tube Q3 is connected to a base of the second PNP tube Q4, and an emitter of the first PNP tube Q2 is connected to an emitter of the second PNP tube Q4 and serves as a negative terminal of the piezoelectric energy collection module P1.
The first direct current source acquisition module U1, the second direct current source acquisition module U2, the third direct current source acquisition module U3 and the fourth direct current source acquisition module U4 are identical in structure, the first direct current source acquisition module U1 comprises a direct current transducer U and a second energy storage capacitor Ct, a pin 1 of the direct current transducer U is connected with one end of the second energy storage capacitor Ct and serves as the positive end of the first direct current source acquisition module U1, and a pin 2 of the direct current transducer U is connected with the other end of the second energy storage capacitor Ct and serves as the negative end of the first direct current source acquisition module U1.
The working principle of the above embodiment is as follows: taking the piezoelectric energy collection module P1 as an example, in a positive half cycle, that is, when the voltage of the pin 1 of the piezoelectric PZT is higher than the voltage of the pin 2, in the first dc source collection module U1, the second dc source collection module U2, the third dc source collection module U3 and the fourth dc source collection module U4, the dc transducer U collects environmental energy to charge the second energy storage capacitor Ct, in the piezoelectric energy collection module P1, the voltage of the pin 2 of the piezoelectric PZT is connected to the gate of the first PMOS transistor PM1, when the difference between the voltage of the pin 1 and the voltage of the pin 2 of the PZT is higher than a threshold voltage, the first PMOS transistor PM1 is turned on, the pin 1 of the high potential of the piezoelectric PZT is grounded, and as the voltage difference between the two ends of the first capacitor C1 gradually increases, until the voltage difference between the two ends of the PZT reaches a peak value, then the voltage difference between the two ends of the piezoelectric PZT begins to decrease, but because the charge accumulated on the first capacitor C1 is not released, therefore, the voltage difference of the capacitor C1 remains unchanged until the voltage difference between the two is greater than the sum of the threshold voltage of the NPN transistor and the conduction voltage drop of the diode, at which time the second NPN transistor Q3 is turned on, thereby causing the second PNP transistor Q4 to be turned on; at this time, an LC resonance loop is formed by the fourth dc source acquisition module U4, the second energy storage capacitor Ct in the first dc source acquisition module U1, the inductor L, and the second PNP transistor Q4, the piezoelectric plate PZT, and the first PMOS transistor PM1 in the piezoelectric energy acquisition module P1, and the loop can transfer charges accumulated in the parasitic capacitor inside the PZT, the first dc source acquisition module U1, and the second energy storage capacitor Ct in the first dc source acquisition module U1 to the inductor L through 1/4 LC resonance cycles; when the current on the inductor L reaches the maximum value, the charge on the first capacitor C1 is released completely, so that the second PNP transistor Q4 is disconnected, that is, the LC resonant circuit is disconnected, then the inductor L, the first dc source acquisition module U1, the second dc source acquisition module U2, and the second energy storage capacitor Ct, the freewheeling diode D, and the first energy storage capacitor Csto in the third dc source acquisition module U3 form a loop, and the energy accumulated on the second energy storage capacitor Ct in the first dc source acquisition module U1, the second dc source acquisition module U2, the third dc source acquisition module U3, and the energy accumulated on the inductor L flow to the first energy storage capacitor Csto through the freewheeling diode D, thereby realizing the energy extraction of the positive half cycle;
in a negative half cycle, namely when the voltage of the pin 2 of the piezoelectric PZT is higher than the voltage of the pin 1, in the first dc source collecting module U1, the second dc source collecting module U2, the third dc source collecting module U3 and the fourth dc source collecting module U4, the dc transducer U collects environmental energy to charge the second energy storage capacitor Ct, in the piezoelectric energy collecting module P1, the voltage of the pin 1 of the piezoelectric PZT is connected to the gate of the second PMOS transistor PM2, when the difference between the voltage of the pin 2 and the voltage of the pin 1 of the piezoelectric PZT is higher than the threshold voltage, the second PMOS transistor PM2 is turned on, the pin 2 of the high potential of the piezoelectric PZT is grounded, as the voltage difference between the two ends of the piezoelectric PZT gradually increases, the voltage difference between the two ends of the first capacitor C1 also continuously increases until the voltage difference between the two ends of the piezoelectric PZT reaches the peak value, and then the voltage difference between the two ends of the piezoelectric PZT starts to decrease, but since the accumulated charge on the first capacitor C1 is not released, the voltage difference between the PZT 1 remains unchanged, until the voltage difference between the first NPN tube and the second NPN tube is greater than the sum of the threshold voltage of the NPN tube and the conduction voltage drop of the diode, the first NPN tube Q1 is conducted, and therefore the 1 st PNP tube Q2 is conducted; at this time, the fourth dc source acquisition module U4, the second energy storage capacitor Ct in the first dc source acquisition module U1, the inductor L, and the first PNP transistor Q2, the piezoelectric PZT, and the second PMOS transistor PM2 in the piezoelectric energy acquisition module P1 form an LC resonant circuit, and the circuit can transfer the charges accumulated in the parasitic capacitor inside the piezoelectric PZT, the first dc source acquisition module U1, and the second energy storage capacitor Ct in the first dc source acquisition module U1 to the inductor through 1/4 LC resonant cycles; when the current on the inductor L reaches the maximum value, the charge on the first capacitor C1 is released completely, so that the first PNP transistor Q2 is disconnected, that is, the LC resonant circuit is disconnected, then the inductor L, the first dc source acquisition module U1, the second dc source acquisition module U2, and the second energy storage capacitor Ct, the freewheeling diode D, and the first energy storage capacitor Csto in the third dc source acquisition module U3 form a loop, and the energy accumulated on the second energy storage capacitor Ct in the first dc source acquisition module U1, the second dc source acquisition module U2, the third dc source acquisition module U3, and the energy accumulated on the inductor L flow to the first energy storage capacitor Csto through the freewheeling diode D, thereby realizing energy extraction of the negative half cycle.
Claims (3)
1. A scalable multi-source environment energy capture interface circuit based on a single inductor is characterized by comprising a first direct current source acquisition module, a second direct current source acquisition module, a third direct current source acquisition module, a plurality of fourth direct current source acquisition modules, piezoelectric energy acquisition modules, an inductor, a freewheeling diode, a first energy storage capacitor and a load, wherein the piezoelectric energy acquisition modules correspond to the fourth direct current source acquisition modules in quantity, the positive end of the first direct current source acquisition module is connected with one end of the inductor, the other end of the inductor, the negative end of the second direct current source acquisition module and the negative end of each fourth direct current source acquisition module are connected, the positive end of each fourth direct current source acquisition module is connected with the negative end of one corresponding piezoelectric energy acquisition module, and the positive end of each second direct current source acquisition module is connected with the anode of the freewheeling diode, the negative electrode of the freewheeling diode is connected with the negative end of the third direct current source acquisition module, the positive end of the third direct current source acquisition module, one end of the first energy storage capacitor and one end of the load are connected, and the other end of the first energy storage capacitor, the other end of the load, the negative end of the first direct current source acquisition module and the positive end of the piezoelectric energy acquisition module are all grounded.
2. The scalable multi-source ambient energy capture interface circuit based on single inductor as claimed in claim 1, wherein the piezoelectric energy harvesting module comprises a piezoelectric plate, a first PMOS transistor, a second PMOS transistor, a first capacitor, a first diode, a second diode, a first NPN transistor, a first PNP transistor, a second NPN transistor, and a second PNP transistor, wherein a source of the first PMOS transistor is connected to a source of the second PMOS transistor and serves as a positive terminal of the piezoelectric energy harvesting module, a drain of the first PMOS transistor, a gate of the second PMOS transistor, a pin 1 of the piezoelectric plate, a cathode of the first diode, a base of the first NPN transistor, and a collector of the first PNP transistor are connected, a drain of the second PMOS transistor, a gate of the first PMOS transistor, a pin 2 of the piezoelectric plate, a cathode of the second diode, a cathode of the first PMOS transistor, a pin 2 of the piezoelectric plate, a cathode of the second diode, and a positive terminal of the piezoelectric energy harvesting module, The base electrode of the second NPN tube is connected with the collector electrode of the second PNP tube, the anode of the first diode, the emitter electrode of the first NPN tube and one end of the first capacitor are connected, the other end of the first capacitor, the anode of the second diode and the emitter electrode of the second NPN tube are connected, the collector electrode of the first NPN tube is connected with the base electrode of the first PNP tube, the collector electrode of the second NPN tube is connected with the base electrode of the second PNP tube, and the emitter electrode of the first PNP tube is connected with the emitter electrode of the second PNP tube and serves as the negative end of the piezoelectric energy collection module.
3. The single-inductor based scalable multi-source ambient energy capture interface circuit of claim 1, wherein the first dc source acquisition module, the second dc source acquisition module, the third dc source acquisition module and the fourth dc source acquisition module have the same structure, the first dc source acquisition module comprises a dc transducer and a second energy storage capacitor, pin 1 of the dc transducer is connected to one end of the second energy storage capacitor and serves as a positive terminal of the first dc source acquisition module, and pin 2 of the dc transducer is connected to the other end of the second energy storage capacitor and serves as a negative terminal of the first dc source acquisition module.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112816A (en) * | 2019-05-14 | 2019-08-09 | 宁波大学 | A kind of prolongable multi-source environment energy capture interface circuit based on single inductance |
| CN112039368A (en) * | 2020-07-22 | 2020-12-04 | 宁波大学 | Expandable energy capture interface circuit based on overturning voltage-multiplying charge extraction |
| CN112072953A (en) * | 2020-07-29 | 2020-12-11 | 宁波大学 | Extensible multi-source energy capture interface circuit |
| CN112072954A (en) * | 2020-07-29 | 2020-12-11 | 宁波大学 | Multi-input piezoelectric vibration energy acquisition circuit |
-
2019
- 2019-05-14 CN CN201920687058.6U patent/CN210608656U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112816A (en) * | 2019-05-14 | 2019-08-09 | 宁波大学 | A kind of prolongable multi-source environment energy capture interface circuit based on single inductance |
| CN110112816B (en) * | 2019-05-14 | 2024-05-10 | 宁波大学 | Expandable multi-source environment energy capture interface circuit based on single inductor |
| CN112039368A (en) * | 2020-07-22 | 2020-12-04 | 宁波大学 | Expandable energy capture interface circuit based on overturning voltage-multiplying charge extraction |
| CN112072953A (en) * | 2020-07-29 | 2020-12-11 | 宁波大学 | Extensible multi-source energy capture interface circuit |
| CN112072954A (en) * | 2020-07-29 | 2020-12-11 | 宁波大学 | Multi-input piezoelectric vibration energy acquisition circuit |
| CN112072954B (en) * | 2020-07-29 | 2021-11-05 | 宁波大学 | Multi-input piezoelectric vibration energy acquisition circuit |
| CN112072953B (en) * | 2020-07-29 | 2021-11-05 | 宁波大学 | Extensible multi-source energy capture interface circuit |
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