Patent ID: 11946892
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A method of detecting, identifying and discriminating various substances in contact with or contaminating a capacitive structure of a sensor, comprising obtaining the linear and non-linear reactance properties of these substances using measurement methods from the group consisting of:
correlating various excitation frequencies (and DC offset) or charge times of the detecting circuit to the measured complete or partial charge of the water-detecting capacitor; correlating the excitation or charge voltage of the detecting circuit to the measured charge in the water-detecting capacitor;
correlating various excitation frequencies (and DC offsets), charge times, excitation voltages and charge voltages, etc., to measure changes in resulting capacitances, complete and partial charge, etc. to determine the linearity, non-linearity, hysteresis and charge mobility of the dielectric properties of the unknown substance impinging the sensing capacitor.