Curve disk-type hydraulic pressure sensor for built-in modulation circuit

A water pressure sensor and conditioning circuit technology, which is applied in fluid pressure measurement using piezoelectric devices, etc., can solve the problems that it is not easy to reduce the output impedance, the sensitivity of low-frequency response is difficult to improve, and the signal conditioning circuit has high requirements for impedance matching and frequency response. , to achieve the effects of suppressing adverse effects, improving stability and reliability, and improving low-frequency sensitivity

Inactive Publication Date: 2010-12-08
710TH RES INST OF CHINA SHIPBUILDING IND CORP
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AI Technical Summary

Problems solved by technology

However, at present, piezoelectric water pressure sensors with conventional structures mostly use tubular or ring-shaped sensitive elements. The axial deformation of such sensitive elements is used to sense external pressure changes. It is difficult to improve the low-frequency response sensitivity and reduce the output impedance. The impedance matching and frequency response of the signal conditioning circuit have relatively high requirements

Method used

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  • Curve disk-type hydraulic pressure sensor for built-in modulation circuit

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Embodiment Construction

[0008] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0009] The main structure is as figure 1 As shown, the present invention is mainly composed of a pressure ring 1, an O-ring 2, a support piece 3, a conditioning circuit 4, a piezoelectric ceramic disc 5, a screw 6, a support base 7, and the like.

[0010] The four piezoelectric ceramic discs 5 are circular sheets with a relatively large diameter and thickness, which are respectively bonded to the front and back sides of the two support plates 3 with conductive adhesive, so that the polar plates on one side of the piezoelectric discs with the same polarity pass through. The support piece 3 made of conductive metal is connected, and the pole plate on the other side is connected by a wire to form a parallel structure on the electrical connection, forming two triple-chip sensitive elements; the support base 7 is a cylindrical metal hollow cavity, and the in...

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Abstract

The invention discloses a curve disk-type hydraulic pressure sensor for a built-in modulation circuit, which comprises a supporting substrate, a pressing ring, supporting slices, piezoelectric ceramic wafers, an impedance convertor circuit board, an o-ring and screws, wherein the four piezoelectric ceramic wafers are bonded and connected in parallel with the two supporting slices respectively to form a sensitive receiving structure of dual three-laminations ; the supporting substrate and the pressing ring form a blade supporting structure; and an impedance convertor circuit is closely arranged in a hollow cavity of the supporting substrate between the dual three-laminations. The structural design can effectively restrain unfavorable influence brought by the external environmental change to the self performance of an impedance converting circuit after a sensor tool is sealed, and improves the stability and reliability of circuit operation.

Description

technical field [0001] The invention relates to a water pressure sensor, in particular to a curved disk type water pressure sensor with a built-in conditioning circuit. Background technique [0002] When the ship is sailing, the underwater part of the hull will disturb the surrounding fluid particles, thereby changing the fluid velocity of the space points around the ship. According to the general principles of fluid mechanics, the change of the velocity of the water particle in the underwater space will bring Pressure changes in the surrounding space underwater. The water pressure sensor is a front-end device used to sense and measure pressure changes caused by ship navigation. [0003] The water pressure sensor using piezoelectric ceramics as the sensitive element has good hydrostatic pressure resistance and underwater impact resistance. However, at present, piezoelectric water pressure sensors with conventional structures mostly use tubular or ring-shaped sensitive elem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L9/08
Inventor 付继伟邓国新郑伟汪小亚杜亮
Owner 710TH RES INST OF CHINA SHIPBUILDING IND CORP
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