Standard gap simulation test method and circuit for gap sensor

Abstract

The invention provides a standard gap simulation test method for a gap sensor. A signal processing board of the gap sensor generates an excitation signal, and the method comprises the following steps: obtaining an oscillogram between the excitation signal and a voltage amplitude; carrying out time delay on the oscillogram; and obtaining actual measurement precision values of the sensor in different standard gaps. According to the gap sensor standard gap simulation test method provided by the invention, the simulation of the voltage amplitude change at the two ends of the measuring coil is realized, the simulation of different gaps is realized, and the simulation test of the measurement precision of the sensor gap is further realized.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a standard gap simulation test method and circuit of a gap sensor for a maglev train. Background technique [0002] Gap sensors for maglev trains are mainly installed at the bottom of the train to measure the vertical and horizontal gaps between the train and the track. The gap measurement accuracy of the sensor directly determines the safety and comfort of the train during running. [0003] At present, the gap measurement of the gap sensor generally uses a semi-physical test bench to simulate the installation state of the sensor on the vehicle. Through physical simulation, the sensor is installed on a mechanism with standard gap control, and the sensor is moved by the control mechanism to allow the sensor to measure the coil. Multiple standard gap values ​​are generated between the tracks, and the measurement accuracy of the sensor gap is obtained by comparing the o...

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Problems solved by technology

Although this method can simulate the actual installation method of the sensor to the greatest extent, in the actual operation process, it is necessary to install the sensor on a semi-physical platform, measure the standard gap value between the coil and the track by controlling the sensor, and then adjust the sensor The back-end output gap value is compared to obtain the accuracy value of the current sensor gap measurement, but this method is limited by the investment requirements of a single device, and only one product can be tested at a time, and because of the mechanical structure simulation, the product must be tested every time. For complex clamping, the test time is long, the test process is cumbersome, and the efficiency is low, which cannot meet the needs of mass production of products

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