Digitized dynamic calibration system for electric turbulent flow sensor

Abstract

The invention provides a digital dynamic calibration system for an electric vortex sensor, which is for calibrating dynamically an electric vortex sensor, and is essentially comprises a hi-speed motor, a magnetic bearing system, a dynamic calibrating disc, an A/D conversion chip, a FPGA chip, a USB bus and an up-level unit. The magnetic bearing system, in conjunction with the hi-speed motor, drives the dynamic calibrating disc to rotate at high speed, generate hi-frequency excitation signals to be input to the sensor to be measured. A photoelectric sensor senses the reference position on the dynamic calibrating disc, generates a reference pulse signal for triggering the A/D conversion chip controlled by the FPGA chip to carry out data sampling of the output signals from the sensor, which first go through A/D conversion by the A/D conversion chip, then are sent into the FPGA chip for data acquisition and processing, sent to the up-level unit through the USB bus; finally the indexes on the dynamic frequency of the electric vortex sensor are got. The invention is especially applicable for the dynamic calibration of the electric vortex sensors used in maglev systems.

Description

technical field [0001] The invention relates to a dynamic calibration system of an eddy current sensor, which is used for dynamic testing and calibration of an eddy current sensor, and is especially suitable for calibrating the dynamic frequency response of an eddy current displacement sensor for non-contact measurement of high-speed rotor displacement in a magnetic bearing system Parameters, such as spacecraft attitude control mechanism magnetic levitation flywheel, eddy current sensor for magnetic levitation gyro. Background technique [0002] The eddy current sensor uses the eddy current effect to make the coil with the high-frequency AC signal generate an alternating magnetic field, and the surface of the measured conductor placed in this alternating magnetic field will generate an eddy current, and this eddy current effect will cause the electrical parameters of the sensor probe coil Changes, with the corresponding measurement circuit, the displacement, vibration, thick...

AI Technical Summary

Problems solved by technology

[0006] The problem solved by the technology of the present invention is to overcome the fact that the dynamic calibration system of the existing eddy current sensor cannot complete the dynamic calibration of the eddy current sensor whose dynamic response requires several thousand hertz and higher, and the digitalization degree of data analysis and processing is low, and the calibration process A dynamic calibration system is provided for the dynamic detection and calibration of eddy current sensors, which increases the frequency range of dynamic calibration, improves the detection accuracy, data processing capability and system versatility.

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