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Two-wire system ultrasonic level transmitter and method thereof

A transmitter and two-wire technology, applied in instruments, liquid level indicators, machines/engines, etc., can solve problems such as poor compressive strength, high sensitivity, and large amplitude, and achieve high sensitivity, large amplitude, and small aftershocks Effect

Inactive Publication Date: 2016-02-17
天津逐帜科技发展有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a two-wire ultrasonic level transmitter and its method, which overcomes the defects of ultrasonic transmitters in the prior art, such as poor sealing, poor compressive strength, and high cost. The advantages of large size, high sensitivity and smaller aftershocks

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  • Two-wire system ultrasonic level transmitter and method thereof

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0017] like figure 1 As shown, the present invention provides a two-wire ultrasonic level transmitter and its method, comprising a hollow metal casing 1, one end of the metal casing 1 is covered with a matching layer 2, and the inside of the matching layer 2 is bonded with a parallel piezoelectric Bimorph 3, the parallel piezoelectric bimorph 3 is that two opposite electrode surfaces of two piezoelectric wafers are respectively bonded on both sides of the metal substrate, and the other two electrode surfaces of the two piezoelectric wafers are electrically connected; The common connection ends of the two piezoelectric wafers are respectively connected with the first connection terminal 4 and the second connection terminal 5 with the metal substrate.

[0018] Preferably, a sound-absorbing material is filled between the parallel-connected piezoelectric b...

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Abstract

The invention provides a two-wire system ultrasonic level transmitter and a method thereof. The level transmitter comprises a hollow metal housing. the level transmitter is characterized in that one end of the metal housing is sealed and covered by a matching layer, the inner side of the matching layer is adhered to a shunt-wound piezoelectric bimorph. The shunt-wound piezoelectric bimorph is formed by respectively adhering two opposite electrode surfaces of two piezoelectric crystal plates on two surfaces of a metal substrate. The other two electrode surfaces of the two piezoelectric crystal plates are electrically connected. The common connecting end of the two piezoelectric crystal plates and the metal substrate are respectively connected with a first connecting terminal and a second connecting terminal. Beneficial effects are that the level transmitter overcomes defects in the prior art that an ultrasonic transmitter is poor in leakproofness and compression strength, and is high in cost. Using the method, the level transmitter is characterized by large amplitude, high sensitivity, and low aftershock.

Description

technical field [0001] The invention belongs to the field of electromechanical technology, and in particular relates to a two-wire ultrasonic level transmitter and a method thereof. Background technique [0002] Ultrasonic sensors are sensors developed using the characteristics of ultrasonic waves. Ultrasound is a mechanical wave with a vibration frequency higher than that of sound waves, which is generated by the vibration of the transducer chip under the excitation of voltage. It has high frequency, short wavelength, small diffraction phenomenon, especially good directionality, and can be oriented as rays dissemination characteristics. Ultrasonic waves will produce significant reflections when they encounter impurities or interfaces to form reflected echoes, and Doppler effects will occur when they encounter moving objects. Therefore, ultrasonic detection is widely used in industry, national defense, biomedicine and so on. To use ultrasound as a detection method, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/296
Inventor 高维松
Owner 天津逐帜科技发展有限公司
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