Online detection device and method for piezoelectric device

• Main Authors: Guo, Hongfeng, Du, Chaoliang
• Format: Patent
• Language: English
• Published: 16.04.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; PHYSICS; TESTING

An online detection device and method for a piezoelectric device. The device comprises an elastic wave sensor, a sell-detection circuit, a working circuit, a switch circuit and a control chip. The switch circuit is connected with the elastic wave sensor, the self-detection circuit and the working circuit. The sell-detection circuit is connected with the control chip and is used for, When being connected to the elastic wave sensor, generating, a self-detection signal according to the capacitance of the elastic wave sensor. The working circuit is connected with the control chip and is used for, when being connected to the elastic wave sensor, forming a touch detection circuit and detecting an external touch by means of the elastic wave sensor so as to obtain a detection signal. The control chip is connected with the switch circuit and is used for outputting a control signal to the switch circuit such that the elastic wave sensor is connected to the working circuit or the self-detection circuit The received self-detection signal is compared with a reference value to obtain a self-detection result of the elastic wave sensor according to the comparison result, or obtain, according to the received detection signal, a touch pressure generated by the external touch.