Self-powered wireless sensing system based on friction nanometer generator

Abstract

The invention discloses a self-powered wireless sensing system based on a nanometer friction generator. The existing self-powered sensing system based on a nano generator is generally processed by a rectifier bridge and then charges a capacitor, and then outputs a scheme for supplying power to a sensor. The self-powered wireless sensing system based on the nanometer friction generator comprises amicroswitch, a diode, a wireless transmitting and receiving circuit carrying sensing information and a signal acquisition and analysis device; the friction nano generator is used for converting external mechanical energy into electric energy to provide energy; the wireless transmitting and receiving circuit carrying the sensing information comprises a signal generating circuit and a signal receiving circuit; the friction nanometer generator with the microswitch and the diode generates a signal carrying sensing information through the signal generating circuit comprising a capacitive sensor, and then the signal is wirelessly transmitted through electromagnetic coupling of a signal receiving circuit. The frequency of the oscillation signal received by the signal acquisition and analysis device changes along with the parameter to be measured, so that a sensing signal with a larger amplitude and the more stable frequency can be obtained.

Description

Technical field [0001] The invention belongs to the field of sensor technology, and specifically relates to a self-powered wireless sensing system based on frictional nanogenerators. Background technique [0002] With the continuous development of science and technology, sensor network technology has made great progress, and new sensors have been spread in every corner of life. Sensor network is the foundation and core of the Internet of Things. The Internet of Things uses information sensing equipment or sensors to connect user subjects and the Internet for information interaction and data acquisition. Through collecting scattered sensor signals through the Internet for statistical analysis, accurate and reliable information can be obtained . However, the number of sensors used in the Internet of Things is huge. For independent sensors to maintain their own continuous work and control the interactive system and the complex connection of a large number of sensors, it has be...

AI Technical Summary

Problems solved by technology

The invention innovatively proposes the combination of a switch structure composed of a microswitch and a diode and a friction nanogenerator to solve the problems of poor stability of the sensing signal, small amplitude, and the attenuation is not easy to be captured by the acquisition device in an extreme time.

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