Piezoelectric and electromagnetic coupling vibration sensor

Abstract

The invention relates to a piezoelectric and electromagnetic coupling vibration sensor. The piezoelectric and electromagnetic coupling vibration sensor comprises an outer shell, a magnetic circuit system is arranged at the center of the outer shell, a closed annular gap is constituted between the magnetic circuit system and the outer shell, a gap magnetic field is generated in the annular gap, coil vibrating bodies are arranged in the annular gap and hung outside the magnetic circuit system through spring pieces, piezoelectric vibrators are arranged between the coil vibrating bodies and the magnetic circuit system, the coil vibrating bodies can vibrate up and down and reset relative to the magnetic circuit system under the condition of external vibration, up-down vibration of the coil vibrating bodies relative to the magnetic circuit system enables the coil vibrating bodies to cut the gap magnetic field to generate induction electric signals, meanwhile, the piezoelectric vibrators deform to generate vibrator deformation electric signals, the induction electric signals are output through wiring terminals externally connected to the coil vibrating bodies, and the vibrator deformationelectric signals are output through wiring terminals externally connected to the piezoelectric vibrators. The piezoelectric effect and the electromagnetic effect are coupled for detection of vibration signals.

Description

technical field [0001] The invention relates to the technical field of vibration sensors, in particular to a piezoelectric and electromagnetic coupling vibration sensor. The invention can be applied to various vibration detections, such as seismic exploration, equipment vibration monitoring, earthquake detection and the like. Background technique [0002] At present, the world's seismic survey is developing towards high resolution, which requires the development of seismometers in the direction of high precision, broadband, and low distortion, that is, super geophones. Compared with ordinary detectors, it has wider dynamic range, smaller distortion, anti-electromagnetic interference and high-precision parameter consistency. [0003] In the prior art, vibration sensors based on the principle of electromagnetic effects are an important branch of seismic exploration research. But it has the problem of signal distortion, the reason is as follows, when the coil passes through th...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a piezoelectric and electromagnetic coupling vibration sensor to solve the technical problems of low monitoring sensitivity and inaccurate monitoring results of vibration sensors in the prior art

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