Circuit and method for supplying power for single chip microcomputer by using transient electric energy

Abstract

The invention discloses a circuit and method for supplying power for a single chip microcomputer by using transient electric energy. The circuit comprises a single chip microcomputer, a piezoelectricceramic generation device, a transient electric energy collection circuit and a plurality of energy storage capacitors; the piezoelectric ceramic generation device is connected with the single chip microcomputer through the transient electric energy collection circuit, a plurality of IO ports of the single chip microcomputer are respectively connected with power supply ground through the energy storage capacitors. The method comprises the following steps: converting transient electric energy into magnetic energy, and converting the magnetic energy into the electric energy to supply power for the single chip microcomputer; tracking the single chip microcomputer power supply voltage by using the maximum power tracking method, controlling the charging / discharging of the energy storage capacitor, thereby enabling the single chip microcomputer to work at the maximum power. The transient electric energy is collected by using the transient electric energy collection circuit to supply power for the single chip microcomputer, furthermore, the single chip microcomputer IO ports are connected with the energy storage capacitor, and the electric quantity and voltage required by the single chipmicrocomputer in normal work can be guaranteed by controlling the charging / discharging of the energy storage capacitor.

Description

technical field [0001] The invention relates to the field of power supplies, in particular to a circuit and method for supplying power to a single-chip microcomputer with transient electric energy. Background technique [0002] Piezoelectric ceramics are information functional ceramic materials that can convert mechanical energy and electrical energy into each other - piezoelectric effect. In addition to piezoelectricity, piezoelectric ceramics also have dielectric properties and elasticity. It has been widely used in medical imaging, acoustic sensors, acoustic transducers, ultrasonic motors, etc. The electrostatic voltage generated by piezoelectric ceramic power generation is high, the current is small, and the time is short, such as the ceramic igniter of a lighter. The prior art cannot effectively use this kind of static electricity for the power supply of electronic products. For example, our usual piezoelectric film can only generate tens of uA of current, while the p...

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