Ultrasonically operated water faucet

Details Ultrasonically operated water faucet Ultrasonically operated water faucet

G - Physics

01

S

349/33, 342/17.1

G01S 15/88 (2006.01) E03C 1/05 (2006.01)

Patent

CA 1190306

ABSTRACT OF THE DISCLOSURE A water faucet is disclosed that is automatically turned on and off in response to the proximity of the user's hand or other object to the faucet. An ultrasonic transducer is located in the faucet near the water outlet and transmits bursts of ultrasonic waves. When a wave reflects off a user's hand and creates an echo signal, the echo is detected by the ultrasonic transducer. Circuitry connected to the ultrasonic transducer determines when an object is within a predetermined distance of the faucet by measuring the time elapsed between the transmission of the burst and the recep- tion of the echo. Once an object is within this predetermined distance, the circuitry causes a valve to open and water is supplied by the faucet.

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