METHOD AND EQUIPMENT FOR CONTROLLING WATER FLOW IN PLUMBING EQUIPMENT BY NONCONTACT FORM AND LAVATORY EQUIPMENT WITH ABOVE-MENTIONED EQUIPMENT

摘要

PURPOSE: To lengthen the lifetime of a battery by adapting the device to a washbowl or the like having various shapes while reducing the consumption of a current by measuring outputs required for the detection and non-detection of the inside of a washbasin tank and the hand of a person. CONSTITUTION: The flow of water in a toilet or the like is controlled in a contactless type by controlling an optical scanning head 3 and a valve 5 installed into a water guide section 4 by a microprocessor. Signals 10 are transmitted from the scanning head 3 to the inside 9 of a washbasin tank and the direction of the hand of a person, and signals 11 reflected from the inside 9 of the washbasin tank and the hand of the person are received by the scanning head 3. Whether or not there is the reflection of the inside 9 of the washbasin tank and the hand of the person in a stored tolerance region is inspected by two transmission signal pulses. A detecting output for controlling the valve 5 by the microprocessor is traced by an approximation, and the change of the detecting output is evaluated.