Measuring system and method of LC (inductive capacitive) sensor in sweep frequency mode

Abstract

The invention provides a measuring system and method of an LC (inductive capacitive) sensor in sweep frequency mode and solves the problem that existing measuring methods are incomplete and low in accuracy and are useless in severe environment and the like. The measuring system comprises a sweep frequency signal source module, a testing antenna end, a mixing frequency module, a signal acquiring module, a central processing module and a display module. An output end of the sweep frequency signal source module is connected with an input end of the testing antenna end and an input end of the mixing frequency module, an output end of the testing antenna end is connected with an input end of the mixing frequency module, an output end of the mixing frequency module is connected with an input end of the signal acquiring module, an output end of the signal acquiring module is connected with an input end of the central processing module, and an output end of the central processing module is connected with an input end of the sweep frequency signal source module and an input end of the display module. The measuring system is simple in structure, convenient to move, easy to implement, convenient to operate, accurate to measure, non-contactable in measuring and applicable to severe environment.

Description

technical field [0001] The invention relates to the technical field of sensor measurement, in particular to a measurement system of a passive wireless LC resonant sensor, in particular to a measurement system of an LC sensor in a frequency sweep mode and a measurement method thereof. Background technique [0002] With the continuous improvement of testing requirements in modern medicine, aerospace and industry, various measurement requirements are increasing. However, in many special occasions, such as high temperature, high pressure and other harsh environments, many sensors cannot be used for direct contact measurement, and it is not suitable to use batteries to power the sensor. Active wired measurement will cause circuit failure of the sensor and high-temperature degradation of the electric lead. question. The use of passive wireless LC sensors can effectively solve the problem of sensor signal measurement in harsh environments through non-contact measurement. [0003]...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current impedance tester for measuring passive wireless LC sensors cannot be measured in harsh environments due to its large size, heavy weight, and inconvenient movement, and to provide an impedance tester with simple structure, convenient movement, and high measurement accuracy. The measuring system and measuring method of the LC sensor in the high frequency sweep mode, the measuring system realizes the test function of replacing the impedance test instrument

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