Patent ID: 11953533
Assignee: CAPITAL ONE SERVICES, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. The capacitive sensor of claim 12, wherein:
the signal generator is configured to apply a second electrical signal step at the input or at the output of the first capacitor to induce a third voltage transient response at the output of the first capacitor, wherein the third voltage transient response is in a direction opposite to the first voltage transient response,
the signal generator is configured to apply the second electrical signal step at the input or at the output of the second capacitor to induce a fourth voltage transient response at the output of the second capacitor, wherein the fourth voltage transient response is in a direction opposite to the second voltage transient response, and
the diagnostic circuit is configured to detect the fault in the capacitive sensor by measuring a third time constant of the third voltage transient response, measuring a fourth time constant of the fourth voltage transient response, and detecting the fault based on the first, the second, the third, and the fourth time constants.