MOISTURE DETECTION SYSTEM AND METHOD OF USE THEREOF

摘要

A moisture detection system includes an electrical conductor mounted on a substrate. The electrical conductor has a resonant frequency that varies as a function of an amount of moisture on the substrate adjacent the electrical conductor. An oscillator outputs an oscillator signal at a predetermined amplitude and a predetermined frequency. A resonator circuit is coupled to the substrate and is responsive to the oscillator signal and the resonant frequency of the electrical conductor for outputting a resonator signal having an amplitude related to the resonant frequency of the electrical conductor. A filter circuit rectifies and filters the resonator signal and provides it to an analog-to-digital converter which outputs a digital signal related to the rectified and filtered resonator signal. A controller is responsive to the digital signal for causing a system associated with the substrate to operate in accordance with the digital signal.