CAPACITIVE SENSING FOR WASHROOM FIXTURE

摘要

A capacitive sensing system (100) and method for a hand washing lavatory- system is disclosed. The lavatory system comprises a receptacle defining a hand washing area, a fixture configured to deliver water to the receptacle, and a capacitive sensing system configured to detect the presence of a user and actuate the fixture. The capacitive sensing system (100) comprises a first sense electrode (300) coupled to the receptacle and configured to measure a first capacitive value, a second sense electrode (305) coupled to the receptacle spaced apart from the, first sense electrode and configured to measure a second capacitive value, and a circuit (150) configured to control operation of the fixture in response to a change in the first capacitive value relative to the second capacitive value.