Self-diagnosis apparatus for piezoelectric film sensors

Abstract

In an example, a system may include a first piezo film sensor and a second piezo film sensor. The first piezo film sensor may be coupled to a sensing object. The first piezo film sensor may have a first reference capacitance and a first measured capacitance and may be configured to emit a drive signal. The second piezo film sensor may be coupled to the sensing object. The second piezo film sensor may have a second reference capacitance and a second measured capacitance. The second piezo film sensor may receive the drive signal and generate an output based on the drive signal. A first operational status associated with the first piezo film sensor and a second operational status associated with the second piezo film sensor may be determined using the first reference capacitance, the first measured capacitance, the second reference capacitance, the second measured capacitance, and the output.

Dependencies are inferred from the claim text.