A New Vibration Energy Harvesting Circuit

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...

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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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