Piezoelectric Sensor Vibrator

Abstract

The invention discloses a piezoelectric ceramic sensor vibrator. The sensor vibrator includes a shell, several piezoelectric ceramic columns, a bracket, an upper pole plate, a lower pole plate, an upper cover plate, a lower cover plate, an upper terminal post, and a lower terminal post. , a pressure plate, a plurality of piezoelectric ceramic columns are fixedly arranged by brackets in the housing, an upper plate, an upper cladding plate, and a pressure plate are sequentially arranged above the plurality of piezoelectric ceramic columns, and the lower part of the plurality of piezoelectric ceramic columns is sequentially arranged The lower pole plate and the lower cover plate, the upper pole plate is connected with the upper terminal, and the lower pole plate is connected with the lower terminal. The present invention adopts a plurality of piezoelectric ceramic columns, which has high sensitivity. In terms of installation and production, in terms of low frequency, it overcomes the characteristics that piezoelectric ceramic sheets are difficult to make into large-scale structures, and it is easy to ensure the consistency of piezoelectric ceramic column parameters and improve Sensitivity to low-frequency signals to achieve a larger frequency response range.

Description

technical field [0001] The invention belongs to the field of piezoelectric sensors, in particular to a vibrator for piezoelectric ceramic sensors. Background technique [0002] A sensor is a detection device that can sense the measured information and convert the sensed information into electrical signals or other required forms of information output according to certain rules to meet the requirements of information transmission, processing, storage, and display. , recording and control requirements. Piezoelectric ceramic sensors are made by using piezoelectric materials under the action of mechanical stress to cause the relative displacement of the internal positive and negative charge centers to cause polarization, resulting in the appearance of bound charges with opposite signs on the surface of the material, that is, the piezoelectric effect. It has sensitive characteristics. Piezoelectric ceramics are mainly used in the manufacture of ultrasonic transducers, underwater...

AI Technical Summary

Problems solved by technology

Marine seismic exploration requires low-frequency underwater acoustic transducers. When the sensitivity requirements are met, the structural size of the transducers is too large, while the sensitivity of small sizes is too low, and a larger transducer array is required to meet the requirements.

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