Improved shearing insulating piezoelectric accelerometer capable of being used at 200 deg.C

A piezoelectric accelerometer and accelerometer technology, applied in the direction of acceleration measurement using inertial force, can solve the problems of detection instruments and test personnel, such as adverse consequences, to improve high-temperature piezoelectric performance and process performance, increase Curie temperature, The effect of guaranteeing accuracy
CN1350182AInactive Publication Date: 2002-05-22SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Publication Date
2002-05-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The sheared bottom-insulated piezoelectric accelerometer, capable of using at high temperature of 200 deg.C is characterized by that its piezoelectric sensing element is a modified lead metanibate high-temp. piezoelectric ceramics made up by using Ca (2+) or Ba (2+) and adding rare-earth oxide. At the same time it adopts a high specific weight elconite mass block, and uses glass body as insulating material of signal output device instead of fluoroplastics, and can uses polyimide material which can be used at 200-250 deg.C for a long period and possesses high impedance and good abrasive resistance to make insulator, and the internal cavity of insulator can be any one kind of inner hexagon, tetragonal or star form. It adopts screw and epoxy resin adhesive double connection process to fix said insulator to the base seat to the accelerometer.
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Description

Technical field

[0001] The invention relates to an improved bottom insulated shear piezoelectric accelerometer used at a high temperature of 200 DEG C, and belongs to the field of vibration sensors. Background technique

[0002] The magnitude of vibration can reflect the operating conditions of objects and equipment. The detection of vibrations involves almost all engineering fields. To detect vibration, a vibration measuring instrument is necessary, and a vibration sensor is indispensable. Among them, the piezoelectric accelerometers with no internal moving parts, small volume, and reliable performance are the most commonly used. The proper choice and performance of the piezoelectric accelerometer are of vital importance to the accuracy, reliability and safety of the detected signal.

[0003] Piezoelectric accelerometers are devices with high output impedance, and the noise signals induced from the connecting cables can sometimes cause great trouble in detection. These interfere...

Claims

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