Signal channel switching method based on sudden change moment detection in vibration process of circuit breaker

A signal channel switching method based on sudden change moment detection inthe vibration process of a circuit breaker comprises the following steps: 1, collecting vibration signals; 2, detecting whether sudden change moments exist in the circuit breaker vibration process or not based on a heterovariance detection method; 3, detecting the position of the sudden change moments in the circuit breaker vibration process based on conditional variance sudden change detection; and 4, dividing the vibration process by taking the sudden change moment of the vibration process as a boundary so as to switch different signal channels by using the amplitude difference of the vibration signals in different vibration stages so as to collect corresponding vibration signals. The vibration process is accurately divided into a forced vibration process and a free vibration process through automatic identification of the sudden change time of the vibration process of the high-voltage circuit breaker, the method of multi-channel si