Micro-vibration detector based on piezoelectric sensing

Abstract

The invention belongs to the field of vibration detection and discloses a micro-vibration detector based on piezoelectric sensing. The micro-vibration detector comprises a housing, a mass block, a conductive ring, piezoelectric sensors and buffer units, wherein a mass block is arranged at the center of the housing, the conductive ring sleeves two symmetric sides of the mass block, multiple bufferunits and the piezoelectric sensors are uniformly arranged on the inner wall of the housing, a supporting block is used for connecting the mass block and the conductive ring, the piezoelectric sensorsare used for converting force signals into electric signals, electrodes are arranged on the inner walls of the conductive ring, wires are arranged on the electrodes and the piezoelectric sensors andused for transmitting out the electric signals. The housing is close to the mass block due to vibration, so that the piezoelectric sensors are in contact with the conductive ring and forms a closed loop with an external circuit, and the amplitude and position of vibration force is judged according to the electric signal fed back by the piezoelectric sensors at different positions so as to determine vibration source and amplitude. By adopting the micro-vibration detector based on piezoelectric sensing, detection of weak seismic wave signals and building micro-vibration is achieved. The micro-vibration detector is simple in structure and low in cost.

Description

technical field [0001] The invention belongs to the field of vibration detection, and more specifically relates to a micro-vibration detector based on piezoelectric sensing. Background technique [0002] The vibration detector is an instrument for measuring the vibration of an object. It is widely used in bridges, buildings, earthquakes and other fields. The vibration detector can also form a vibration measurement system with an acceleration sensor to measure the acceleration, velocity and displacement of an object. [0003] In the prior art, most of the vibration detectors are mainly electromagnetic sensors, piezoresistive sensors and photoelectric sensors, and the detection of tiny vibrations is mainly based on photoelectric sensors, and because the photoelectric sensors are affected by the environment during use , there is no detection of small vibrations in some specific narrow areas, and there is a lack of a sensitive and general micro-vibration detection device. Cont...

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Problems solved by technology

[0003] In the prior art, most of the vibration detectors are mainly electromagnetic sensors, piezoresistive sensors and photoelectric sensors, and the detection of tiny vibrations is mainly based on photoelectric sensors, and because the photoelectric sensors are affected by the environment during use , there is no small vibration in some specific narrow areas that cannot be detected, and there is a lack of a sensitive and general micro-vibration detection device

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