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

Claim 13:
14. The piezoelectric device online detection method according to claim 9, wherein the elastic wave sensor is a group of parallel sensors comprising n parallel elastic wave sensors; the self-check circuit comprises a first measurement circuit and a second measurement circuit;
the acquiring the self-check signal generated by the self-check circuit for the elastic wave sensor, comparing the self-check signal with the reference value, and obtaining the self-check result of the elastic wave sensor according to the comparison result, comprises:
controlling the first measurement circuit to detect the group of parallel sensors, sampling an output of the first measurement circuit, and determining whether there is one or more damaged sensors in the group of parallel sensors according to a first sampling result; and
when there is one or more damaged sensors in the group of parallel sensors, controlling the second measurement circuit to detect a single sensor in the group of parallel sensors, sampling an output of the second measurement circuit, and determining the one or more damaged sensors in the group of parallel sensors according to a second sampling result.