Full-automatic eddy current sensor dynamic/ static checking instrument

Abstract

The invention provides a completely automatic eddy current sensor dynamic / static checking instrument, belonging to the measurement field. The completely automatic eddy current sensor dynamic / static checking instrument comprises a static testing disc, a static checking bracket, a dynamic checking bracket, a dynamic bias disc, a main driving motor, and a CPU and is characterized in that a linear module group with a movable guide rail extending frame is provided; the guide rail extending frame and the linear module group are provided with a positioning retaining block and a non-mechanical-contact type positioning switch; the guide rail extending frame is provided with the static testing disc; the disc surface of the checking instrument is provided with the static checking bracket; the guide rail extending frame is provided with the dynamic checking bracket; the dynamic bias disc and the main driving motor are arranged below the dynamic checking bracket; the CPU is connected with a stepping motor by a stepping motor driver and is connected with the main driving motor by a main motor driver at the same time; the non-mechanical-contact type positioning switch is connected with the stepping motor driver by a stepping motor control circuit; a probe is connected with a periphery function extending interface circuit of the CPU by a signal detection sampling circuit. The completely automatic eddy current sensor dynamic or static checking instrument is suitable for the dynamic and static checking of eddy current sensors.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a calibration device for an eddy current sensor. Background technique [0002] The important role of sensor technology in social development With the rapid development of science and technology, the testing and control technology of non-physical quantities has been more and more widely used in aerospace, aviation, transportation, metallurgy, machinery manufacturing, petrochemical, light industry, Technical fields such as technical supervision and testing are gradually being introduced into people's daily life. [0003] The eddy current sensor adopts the principle of induced eddy current. When the coil with high frequency current is close to the measured metal, the high frequency electromagnetic field generated by the high frequency current on the coil will generate an induced current on the metal surface, which is called electromagnetically. It is eddy current. ...

AI Technical Summary

Problems solved by technology

[0008] Due to the working characteristics of the eddy current sensor, the vast majority of users cannot calibrate it on site (referring to the installation site of the user's mechanical equipment), and can only disassemble it and send it to a special laboratory or instrument calibration. It takes a long time for sensor calibration to be sent to the laboratory or sensor manufacturer for inspection and calibration. For some large units or users who have installed multiple eddy current sensors, this is a very time-consuming and laborious task. , costly work, and cannot meet the time requirements for quick maintenance or breakdown repair, which brings hidden dangers to the safe and stable operation of large equipment or complex machinery

[0009] At the same time, due to the difference in the calibration methods of dynamic and static calibration of eddy current sensors and the structure of calibration devices, most of the existing calibrators have single functions, and the origin calibration of existing instruments, static test plate or probe mounting frame Movement, adjustment, and positioning are all realized manually, and its measurement accuracy is limited by the measuring tool (micrometer) and the adjustment method (manual and human eye observation), which can only reach the millimeter level, and the error is large, which increases the calibration The time spent increases the workload of the testers, and it is not conducive to the full play of the functions of each test and calibration instrument, and the accuracy of the calibration results is low.

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