Novel vibration frequency sensor system based on voltage multiplier

Abstract

The invention provides a novel vibration frequency sensor system based on a voltage multiplier. The novel vibration frequency sensor system consists of a piezoelectric energy harvester and a signal conditioning circuit, wherein sinusoidal vibration is directly detected by means of the piezoelectric energy harvester, and the vibration is converted into a corresponding output voltage; the signal conditioning circuit is constructed by means of the voltage multiplier, a pulse shaper and a low-pass filter; and the output voltage of the piezoelectric energy harvester is processed by means of the signal conditioning circuit to obtain an output voltage signal reflecting the magnitude of the vibration frequency. The novel vibration frequency sensor can realize direct measurement of the sinusoidal vibration frequency, simplifies the structure of the vibration sensor system, and reduces the usage cost.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a novel vibration frequency sensor system based on a voltage multiplier. Background technique [0002] The phenomenon of mechanical vibration is ubiquitous in all aspects of production and life. People expect to control mechanical vibration to better serve human production and life. But in most cases, mechanical vibration is uncontrollable and harmful, for example: friction or eccentricity of mechanical bearings will cause high-speed precision spindles to vibrate, which will affect the precision of precision machining; mechanical resonance will aggravate the machine and rotating parts The vibration will cause mechanical failure, and even destroy the entire production system, resulting in serious consequences such as economic losses, casualties, and environmental pollution. In order to reduce the harm of mechanical vibration and ensure the safe and reliable operation of mechanical equipmen...

AI Technical Summary

Problems solved by technology

[0006] (1) Most vibration sensor systems directly measure the displacement, velocity and acceleration of vibration, but cannot directly reflect the magnitude of vibration frequency;

[0007] (2) In order to obtain frequency information from these common vibration sensor systems, additional conversion or processing units must be added, resulting in more complex and redundant systems and increased use costs

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