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

Claim 5:
6. The piezoelectric device online detection apparatus according to claim 1, 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, and the control chip comprises a sampling control circuit, wherein
the first measurement circuit is configured to detect the group of parallel sensors under control of the sampling control circuit;
the second measurement circuit is configured to poll and detect any one elastic wave sensor in the group of parallel sensors under control of the sampling control circuit; and
the sampling control circuit is configured to control the first measurement circuit to detect the group of parallel sensors, sample an output of the first measurement circuit, and determine whether there is one or more damaged elastic wave sensors in the group of parallel sensors according to a first sampling result; when there is one or more damaged elastic wave sensors in the group of parallel sensors, control the second measurement circuit to detect a single sensor in the group of parallel sensors, sample an output of the second measurement circuit, and determine the one or more damaged elastic wave sensors in the group of parallel sensors according to a second sampling result; and control the group of parallel sensors to connect with the working circuit during initialization or when there is no damaged elastic wave sensor in the group of parallel sensors.