Patent ID: 11959797
Assignee: BEIJING TAIFANG TECHNOLOGY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. The piezoelectric device online detection method according to claim 15, wherein
the detecting whether there is one or more damaged sensors in the group of parallel sensors comprises:
when an excitation signal is given, if a first measured signal amplitude A11 shown in the first sampling result is less than a signal amplitude threshold Ath1, detecting that there is one or more damaged sensors in the group of parallel sensors; and recording the signal amplitude threshold Ath1 and the first measured signal amplitude A11, and calculating a signal amplitude difference H between the signal amplitude threshold Ath1 and the first measured signal amplitude A11;
wherein when the excitation signal is given, if all sensors in the parallel sensors work normally, then the first measured signal amplitude A11 shown in the first sampling result is the signal amplitude threshold Ath1; and
the determining the one or more damaged sensors according to the second sampling result comprises: detecting the sensors in the group of parallel sensors one by one until a sum of amplitude differences detected each time is equal to the signal amplitude difference H, and determining that a corresponding sensor, for which a signal amplitude difference is detected, is a damaged sensor.