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

Claim 0:
1. A piezoelectric device online detection apparatus, comprising: an elastic wave sensor, a self-check circuit, a working circuit, a switching circuit, and a control chip; the switching circuit being connected to the elastic wave sensor, the self-check circuit, and the working circuit respectively; wherein
the self-check circuit is further connected to the control chip and is configured to generate a self-check signal when connected to the elastic wave sensor;
the working circuit is further connected to the control chip and is configured to form a contact detection circuit when connected to the elastic wave sensor and detect an external contact through the elastic wave sensor to obtain a detection signal;
the control chip is further connected to the switching circuit and is configured to output a control signal to the switching circuit to connect the elastic wave sensor with the working circuit or the self-check circuit; and when the control signal is output to the switching circuit to connect the elastic wave sensor with the self-check circuit, the control chip is further configured to compare a received self-check signal with a reference value, and obtain a self-check result of the elastic wave sensor according to a comparison result; Of and when the control signal is output to the switching circuit to connect the elastic wave sensor with the working circuit, the control chip is further configured to obtain a contact pressure generated by the external contact according to a received detection signal.