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Ultrasonic sensor

A sensor and ultrasonic technology, applied in the field of sensors, can solve the problems of insufficient compatibility, narrow sensor bandwidth, unstable receiving sensitivity, etc., to achieve the effect of improving stability and consistency, increasing vibration speed, and facilitating consistency

Inactive Publication Date: 2020-04-24
寿光市飞田电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the bandwidth of sensors made of existing piezoelectric crystal ceramic chips is relatively narrow, the receiving sensitivity is unstable, and the compatibility of frequency drift impedance changes at different temperatures is not enough.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0037] Example 1, such as Figure 2 to Figure 4 As shown, an ultrasonic sensor includes a rubber sleeve 4, an acoustic wedge 3, a piezoelectric crystal chip 2 and a stainless steel cap 1, the top of the rubber sleeve 4 is provided with a circular through hole 41, and the bottom of the rubber sleeve 4 is provided with an annular groove 42. The stainless steel cap 1 is installed in the rubber sleeve 4, the extension of the lower end of the stainless steel cap 1 is embedded in the annular groove 42, the upper surface of the top of the stainless steel cap 1 is fitted with the lower surface of the top of the rubber sleeve 4, and the sound wedge 3 is embedded in the circular groove 42. In the through hole 41, the bottom of the sound wedge 3 is close to the upper surface of the top of the stainless steel cap 1, the piezoelectric crystal chip 2 is arranged in the stainless steel cap 1, and the top of the piezoelectric crystal chip 2 is fixed on the lower surface of the top of the stain...

Embodiment 2

[0048] Example 2, such as figure 2 with Figure 5 As shown, an ultrasonic sensor includes a rubber sleeve 4, an acoustic wedge 3, a piezoelectric crystal chip 2 and a stainless steel cap 1, the top of the rubber sleeve 4 is provided with a circular through hole 41, and the bottom of the rubber sleeve 4 is provided with an annular groove 42. The stainless steel cap 1 is installed in the rubber sleeve 4, the extension of the lower end of the stainless steel cap 1 is embedded in the annular groove 42, the upper surface of the top of the stainless steel cap 1 is fitted with the lower surface of the top of the rubber sleeve 4, and the sound wedge 3 is embedded in the circular groove 42. In the through hole 41, the bottom of the sound wedge 3 is close to the upper surface of the top of the stainless steel cap 1, the piezoelectric crystal chip 2 is arranged in the stainless steel cap 1, and the top of the piezoelectric crystal chip 2 is fixed on the lower surface of the top of the s...

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Abstract

The invention discloses an ultrasonic sensor, which comprises a rubber sleeve, a sound wedge, a piezoelectric crystal chip and a stainless steel cap, wherein the stainless steel cap is installed in the rubber sleeve, the sound wedge is embedded into the top end of the rubber sleeve, the piezoelectric crystal chip is arranged in the stainless steel cap, and a lead is welded to the piezoelectric crystal chip and the stainless steel cap respectively. A plurality of transverse dividing grooves and radial dividing grooves are evenly formed in the piezoelectric crystal chip, and the piezoelectric crystal chip is evenly divided into a plurality of square oscillators by the transverse dividing grooves and the radial dividing grooves. The advantages are that after the piezoelectric crystal chip isdivided into the small oscillators, multi-point resonance is achieved, so that increase of the bandwidth is facilitated, multi-point resonance is facilitated, increase of the oscillation starting speed is facilitated, and the consistency of the center frequency is facilitated.

Description

technical field [0001] The invention relates to a sensor, in particular to an ultrasonic air sensor, which belongs to the technical field of 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. There are many types of sensors. For example, ultrasonic air sensors are currently widely used, mainly in industry, national defense, biomedicine, etc. Ultrasonic air sensors are sensors that convert ultrasonic signals into other energy signals (usually electrical signals). [0003] Such as figure 1 As shown, the piezoelectric crystal ceramic chip of the existing sensor is uniformly provided with several strip-shaped dividing grooves, the grooves run through both ends of th...

Claims

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Application Information

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IPC IPC(8): G01F1/66
CPCG01F1/662G01F1/667
Inventor 袁燕飞
Owner 寿光市飞田电子有限公司