Turnout switch machine display bar gap width monitoring system and its eddy current sensor

Abstract

The invention discloses a system for monitoring the gap width of a switch machine display rod and its eddy current sensor. The eddy current sensor includes an eddy current probe and an eddy current circuit; the eddy current circuit includes an oscillator module, a wave detection module, a temperature compensation module, an output Buffer level module; the eddy current sensor uses high-frequency oscillating current to pass through the eddy current probe to generate an alternating magnetic field at the head of the eddy current probe. When a metal conductor moves within the effective range of the alternating magnetic field, the magnetic field will change with the movement of the metal. change, and convert this change into a voltage or current change; the oscillator module is responsible for generating an oscillating signal and outputting it to the detection module; the detection module is used to rectify and filter the AC voltage signal output by the oscillator module into a stable DC voltage signal; The compensation module is used to compensate the temperature; the output buffer module is used to amplify and output the DC voltage signal of the upper stage. The invention can acquire the change of the gap between the inspection post and the gap of the inspection block in real time.

Description

technical field [0001] The invention belongs to the technical field of electronic communication, and relates to a system for monitoring the gap width of a switch point machine indicating rod, in particular to an eddy current sensor used for monitoring the gap width of a switch point machine indicating rod. Background technique [0002] Whether the working status of the railway turnout switch machine is normal or not is very important to ensure the normal operation of the railway. In the future, the operation of large-axle-load trains and the further increase in traffic volume will cause more frequent impact on the turnout equipment and increase the vibration intensity. , faster wear, and geometric changes. The research on the monitoring of the working state of the railway switch switch machine has never been interrupted for more than ten years. The resistance is an indirect expression of the closeness of the point rail of the switch machine, and the width of the notch of the...

AI Technical Summary

Problems solved by technology

[0003] The existing monitoring methods for the gap width of the indicator rod all have their shortcomings: such as the touch bead sensor technology and the spring displacement sensor technology, the detection device is easily damaged, the photoelectric encoder technology is easily polluted and the accuracy is reduced, and the reflective optical fiber displacement Sensor technology and Hall displacement sensor technology. The probe is too large and inconvenient to install. The camera technology method does not quantify the detection results and requires manual judgment to indicate the width of the rod gap.

[0004] At the same time, the existing commonly used monitoring method is the camera technology method, which requires a special communication line along the rail, the system cost is relatively high, and there is no quantitative detection result, and manual judgment is required to indicate the gap width of the pole. Personal subjective factors, imprecise, large error

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