Signal detection method of speed sensor based on eddy current principle
A technology of eddy current sensor and speed sensor, which is applied to devices using electric/magnetic methods, linear/angular velocity measurement, velocity/acceleration/shock measurement, etc., which can solve the problem of interface incompatibility, unintuitive signal characteristics, and performance testing There are problems such as relatively large difficulty, to achieve the effect of improving anti-interference and adaptability, and strong practicability
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[0018] In order to make the purpose, content, and advantages of the present invention clearer, the specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0019] The present invention designs a signal detection method, comprising:
[0020] In the urban rail CBTC signal system, the speed and distance measurement of the train is mainly based on the speed sensor, which is converted into speed and distance information by collecting the signal of the speed sensor.
[0021] At present, many urban rail CBTC systems use eddy current velocity sensors with double pulse output. The sensor is composed of two LC oscillation circuits with the same structure. The resonant frequencies of these two oscillation circuits are 45kHz and 60kHz respectively. When the wheel rotates, it will drive the gear to rotate synchronously, causing the distance between the teeth and the inductor coil to change alterna...
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