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Device and method for evaluating stability of capacitive non-contact displacement measuring system

A system stability and displacement measurement technology, applied in the direction of measuring devices, using electrical devices, using electromagnetic means, etc., can solve the problems of not meeting the requirements of the system, not applicable, and unable to evaluate the long-term working stability of the system, so as to improve the monitoring Capability, small size, effect of reducing errors

Pending Publication Date: 2019-09-13
善测(天津)科技有限公司
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Problems solved by technology

Therefore, the existing verification methods can only verify the current and short-term working conditions of the system, and cannot evaluate the long-term working stability of the system.
At the same time, due to the relatively large specifications of the verification instruments and the measuring instruments with mechanical structures, this verification procedure is not applicable if you want to realize the evaluation of the temperature change stability of the system
[0005] Based on the above background, for the capacitive non-contact displacement measurement system, the existing verification procedures can no longer meet the requirements of the current environment for the use of the system, and new evaluation devices and methods are needed to achieve the long-term working stability of the capacitive non-contact displacement measurement system and evaluation of stability against temperature changes

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  • Device and method for evaluating stability of capacitive non-contact displacement measuring system

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] The basic working principle of the capacitive non-contact displacement measurement system independently developed by Shance (Tianjin) Technology Co., Ltd. is as follows: figure 1 shown. The probe of the capacitive displacement sensor 2 and the end face of the metal conductor 1 to be tested are equivalent to the two poles of the capacitor plate. When the gap between the two changes, according to the capacitance expression The change of the gap d causes the change of the capacitance C, and the generated signal is transmitted by the triaxial extension cable 3 to the capacitive non-contact displacement measurement system 4 for subsequent processing. The measurement range of the ...

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Abstract

The present invention discloses a device and method for evaluating stability of a capacitive non-contact displacement measuring system. The evaluating device is used to be equivalent to a state when agap between a probe of a capacitive displacement sensor and a to-be-measured surface is constant. The evaluating device is formed by mutually connecting a standard capacitor and a triaxial cable, wherein the triaxial cable comprises an outer shield layer, an inner shield layer and a core pole. Both ends of the standard capacitor are respectively connected with the outer shield layer and the corepole on one end of the triaxial cable. The other end of the triaxial cable is finally connected with a capacitive non-contact displacement measuring system through a connecting male head, a connectingfemale head and a triaxial extension cable.

Description

technical field [0001] The invention relates to the technical field of capacitive precision measurement, in particular to a device and method for evaluating the stability of a capacitive non-contact displacement measurement system. Background technique [0002] The capacitive non-contact displacement measurement system is a non-contact precision measuring instrument that adopts the principle of capacitive frequency modulation or capacitive operation. It can be used with capacitive displacement sensors to achieve geometric measurement in different industry application requirements. Capacitive displacement sensors not only have the advantages of no friction and no wear common to non-contact instruments, but also have a large signal-to-noise ratio, high sensitivity, small zero drift, wide frequency response, small nonlinearity, and good precision stability. Strong anti-electromagnetic interference ability and so on. [0003] A capacitive displacement sensor is essentially a ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02
CPCG01B7/02
Inventor 李杨宗段发阶叶德超周琦
Owner 善测(天津)科技有限公司
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