A New Vibration Energy Harvesting Circuit

A vibration energy harvesting and energy harvester technology, which is applied in current collectors, circuit devices, battery circuit devices, etc., can solve the problems of complex circuit structure, dissipation, and long acquisition time, so as to shorten the acquisition time and improve the acquisition efficiency. , the effect of improving the collection efficiency

Active Publication Date: 2019-09-10
FOSHAN SHUNDE SUN YAT SEN UNIV RES INST +2
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Problems solved by technology

A kind of vibration energy acquisition circuit is disclosed in the Chinese patent whose publication number is CN107171593A, with reference to the description accompanying drawing of this patent document figure 1 , although the extraction and collection of vibration energy can be realized, but more diodes and resistors are used in the circuit, which makes the overall circuit structure more complicated. Correspondingly, the collection time becomes longer, and because the diode has a conduction voltage drop, Resistors are also energy-consuming components, so a lot of power will be dissipated during the collection process, so the actual collected power is not much

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  • A New Vibration Energy Harvesting Circuit
  • A New Vibration Energy Harvesting Circuit

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Embodiment Construction

[0018] refer to figure 1 , a novel vibration energy harvesting circuit of the present invention includes an energy harvester 1 for collecting the vibration energy of the piezoelectric sheet, a detection module 2 for detecting the peak voltage of the piezoelectric sheet, and a detection module 2 for realizing the charge in the piezoelectric sheet The energy storage module 4 for extraction and storage and the dual switch module 3 for controlling the charge transfer and voltage peak detection in the piezoelectric sheet;

[0019] The energy harvester 1 includes a current source Ip, an equivalent parasitic capacitance Cp for simulating the internal parasitic capacitance of the piezoelectric sheet, and an equivalent leakage resistance Rp for simulating the internal resistance of the piezoelectric sheet, and the detection module 2 includes a first Capacitor C1 and second capacitor C2, the dual switch module 3 includes a first PNP transistor Q1, a first NPN transistor Q2, a second PNP...

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Abstract

The invention discloses a novel vibration energy acquisition circuit. Two capacitors of a detection module are used for replacing a resistor and a diode in a traditional circuit and can also be used for detecting the peak voltage of a piezoelectric plate. As the capacitors are energy storage elements which neither have on-state voltage drop like the diode nor consume energy like the resistor, so that the consumption in the circuit is reduced, and the output voltage is easily increased; meanwhile, the circuit structure can be optimized and simplified, the acquisition time can be greatly shortened, and the acquisition efficiency can be improved as a whole. Besides, the two capacitors of the detection module can transfer charges in an equivalent parasitic capacitor into an inductor and then transfer the charges in the inductor into an energy storage capacitor, so that besides direct extraction of charges in the piezoelectric plate, extraction of charges in the equivalent parasitic capacitor is performed, and the acquisition efficiency is further improved.

Description

technical field [0001] The invention relates to the technical field of energy collection, in particular to a novel vibration energy collection circuit. Background technique [0002] Energy exists in a variety of forms, and various energies in nature are also abundant. If they can be converted into electrical energy, the energy crisis can be alleviated. Among them, vibration energy is more extensive and is also an important topic of current research. A kind of vibration energy acquisition circuit is disclosed in the Chinese patent whose publication number is CN107171593A, with reference to the description accompanying drawing of this patent document figure 1 , although the extraction and collection of vibration energy can be realized, but more diodes and resistors are used in the circuit, which makes the overall circuit structure more complicated. Correspondingly, the collection time becomes longer, and because the diode has a conduction voltage drop, Resistors are also ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18H02J7/34
Inventor 赵自强叶涛俞慧潘吉钊
Owner FOSHAN SHUNDE SUN YAT SEN UNIV RES INST
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