Ultrasonic sensor

A sensor and ultrasonic technology, applied in the ultrasonic field, can solve the problems of affecting the vibration of piezoelectric ceramic sheets, complex process, decreased sensitivity, etc., to reduce the binding force, simplify the process, and reduce the production cost.

Pending Publication Date: 2018-08-24
ZHAOQING AUDIOWELL SENSOR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an ultrasonic sensor to solve the problem that the sensitivity of the existing ultrasonic sensor is reduced due to the addition of patch glue, potting glue, and sound-absorbing cotton to the housing, which makes the process complicated and affects the vibration of the piezoelectric ceramic sheet. problem, thereby effectively simplifying the process and realizing the free vibration of the piezoelectric ceramic sheet, thereby improving the sensitivity of the ultrasonic sensor

Method used

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no. 1 approach

[0037] In this embodiment, the other end of the support member 21 extends along the side wall of the piezoelectric ceramic sheet 3 and forms a first installation groove, and the outer wall surface of the piezoelectric ceramic sheet 3 is against the first mounting groove. On the inner wall surface of a mounting groove; the cross-sectional area of ​​the first mounting groove is greater than the cross-sectional area of ​​the groove 23, and a first step portion 211 is formed before the first mounting groove and the groove 23, The top of the piezoelectric ceramic sheet 3 abuts against the first step portion 211 , and the bottom of the piezoelectric ceramic sheet 3 abuts against the bottom of the cavity of the housing 1 .

[0038] In this embodiment, the piezoelectric ceramic sheet 3 is in an annular structure, and the shape of the first mounting groove is adapted to the shape of the piezoelectric ceramic sheet 3. Therefore, the piezoelectric ceramic sheet 3 can be Partially accommo...

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PUM

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Abstract

The invention discloses an ultrasonic sensor. The ultrasonic sensor comprises a shell, a fixing assembly and a piezoelectric ceramic piece, wherein one end of the shell is open, a cavity is formed inthe shell, and the piezoelectric ceramic piece is arranged on the bottom of the cavity; the fixing assembly comprises a fixing piece and a supporting piece, the fixing piece is connected to the opening end of the shell in a sealing mode, one end of the supporting piece is connected to the surface of the end, facing the piezoelectric ceramic piece, of the fixing piece, and the other end of the supporting piece abuts against the piezoelectric ceramic piece; and a groove is formed in the supporting piece, and the groove is located between the fixing piece and the piezoelectric ceramic piece. According to the ultrasonic sensor, the process is effectively simplified; and free vibration of the piezoelectric ceramic piece is realized, so that the sensitivity is improved.

Description

technical field [0001] The invention relates to the field of ultrasonic technology, in particular to an ultrasonic sensor. Background technique [0002] At present, the ultrasonic sensor is a sensor developed by utilizing the characteristics of ultrasonic waves. It realizes the piezoelectric conversion function through the vibration of the piezoelectric ceramic installed in the shell. The vibration mode and vibration amplitude of the piezoelectric ceramic in the shell are related to the entire The effectiveness of the electrical performance conversion of the sensor, the less the load of the piezoelectric ceramic, the freer the vibration, the less useless work consumed internally, and the greater the sensitivity of the sensor. [0003] In the prior art, ultrasonic sensors are generally made of piezoelectric ceramic sheets, wherein one side of the piezoelectric ceramic sheet needs to be attached to the shell with patch glue, and softened sound-absorbing cotton is added to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B06B1/06
CPCB06B1/06
Inventor 刘欢钟海梁锭舒钱常德
Owner ZHAOQING AUDIOWELL SENSOR TECH CO LTD
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