Piezoelectric ceramic sensor oscillator

Abstract

The invention discloses a piezoelectric ceramic sensor oscillator. The sensor oscillator comprises a shell, a plurality of piezoelectric ceramic columns, a support, an upper pole plate, a lower pole plate, an upper covering plate, a lower covering plate, an upper binding post, a lower binding post and a pressing plate. The piezoelectric ceramic columns are fixed in the shell through the support, the upper pole plate, the upper covering plate and the pressing plate are arranged above the piezoelectric ceramic columns in sequence, the lower pole plate and the lower covering plate are arranged below the piezoelectric ceramic columns in sequence, the upper pole plate is connected with the upper binding post, and the lower pole plate is connected with the lower binding post. The piezoelectric ceramic columns are adopted, the advantages that sensitivity is high, and the defect that piezoelectric ceramic pieces cannot be manufactured to be of a large-size structure easily in the aspect of mounting and manufacturing and low frequency is overcome are achieved, consistency of parameters of the piezoelectric ceramic columns is guaranteed easily, the sensitivity of low-frequency signals is improved, and the large frequency response range is achieved.

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...

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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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