Wheel derailment alarm method and system
A technology of wheels and sleepers, which is applied in the field of rail transit, can solve the problems of derailment false alarms, difficulty in completely and effectively evaluating derailment risks and derailment accidents, and achieve the effect of reducing the probability of false alarms, stable and reliable derailment alarm process, and accurate derailment alarm
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[0072] Among them, there are many methods of performing resonance demodulation on the vibration signal to obtain the resonance demodulation signal, and two examples are given below to illustrate. Example 1: When the vibration signal is acquired, the speed pulse signal of the speed sensor installed on the wheel shaft or other shafts through gear transmission is used to process the speed tracking sampling control signal FC that is C times the FN of the wheel speed frequency (i.e. FC=C*FN, wherein C is a positive integer such as C=400), and the speed pulse signal is processed as the speed tracking filter control signal FL of C*L times of the wheel speed frequency FN (wherein L is a positive integer, such as L= 20), using the rotational speed tracking filtering control signal FL to trigger acquisition of the resonance demodulation signal. Example 2: In the absence of the control signal FL, after the vibration signal is obtained by timing high-speed sampling and resonantly demodula...
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