A piezoelectric sensor for comprehensive detection of geoacoustic-hydroacoustic signals

Abstract

The invention provides a piezoelectric sensor for comprehensively detecting an earthquake sound-acoustic signal. The piezoelectric sensor comprises a sealed square shell having a cavity structure; and an inertia mass ball is arranged inside the square shell. Piezoelectric ceramic groups are embedded into four side walls connected in an end-to-end manner of the square shell; and a charger amplifier is arranged at one front end surface connected with the four side wall at the square shell. The charger amplifier is used for receiving and amplifying electric signals generated by the piezoelectric ceramic groups and outputting the electric signals to external acquisition equipment. The piezoelectric ceramic groups include first piezoelectric ceramic sheets and second piezoelectric ceramic sheets; the first piezoelectric ceramic sheets approach the outer sides of the side walls and the second piezoelectric ceramic sheets approach the inner sides of the side walls; and sealed cavity structures are formed between the first piezoelectric ceramic sheets and the second piezoelectric ceramic sheets. Therefore, seismic wave signals that are transmitted along the seabed and are generated by a vibration target and sound pressure signals transmitted by sea water in ocean can be sensed simultaneously.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a piezoelectric sensor for comprehensively detecting geoacoustic-hydroacoustic signals. Background technique [0002] At present, sensors such as moving coil geophones, piezoelectric universal geophones, and MEMS geophones are mostly used to detect geoacoustic signals generated by seismic waves, and hydrophones are used to detect underwater acoustic signals. Vibration targets in the ocean can generate geoacoustic and hydroacoustic signals at the same time, which increases the cost and complexity of the detection equipment. At present, the geoacoustic-hydroacoustic dual detectors that are often used are just a simple combination of land-use geophones and hydrophones. , Mechanically combined, the cost is not reduced, and the equipment is relatively large. At the same time, the signal wave received by this kind of detector is one-sided, and its accuracy cannot be guaranteed. Contents of th...

AI Technical Summary

Problems solved by technology

Vibration targets in the ocean can generate geoacoustic and hydroacoustic signals at the same time, which increases the cost and complexity of the detection equipment. At present, the geoacoustic-hydroacoustic dual detectors that are often used are just a simple combination of land-use geophones and hydrophones. , mechanically combined together, the cost has not been reduced, and the equipment is larger

At the same time, the signal wave received by this kind of detector is one-sided, and its accuracy cannot be guaranteed.

Images