AUTOMATIC FEED WATER EQUIPMENT

PROBLEM TO BE SOLVED: To provide automatic feed water equipment provided with a highly reliable microwave doppler sensor with a simple structure. SOLUTION: The automatic feed water equipment comprises: the microwave Doppler sensor for transmitting a carrier wave C and detecting the human body, water discharge, or urinary flow; and a control part for controlling water supply by a feed water part to a toilet bowl or a wash basin, based on a detection result of the microwave doppler sensor. The microwave Doppler sensor includes a carrier wave generating part for generating the carrier wave C. The carrier wave generating part includes: a timer for maintaining a switching cycle for switching a frequency of the carrier wave C; a random number generator for generating a random number on each switching cycle the timer maintains; a frequency switching means for selecting and switching the frequency of the predetermined carrier wave C from a plurality of frequency bands on each switching cycle maintained by the timer, based on the random number generated by the random number generator; and a frequency setting means for setting the frequency switched by the frequency switching means to the carrier wave C. The microwave doppler sensor switches the carrier wave C to detect the human body, water discharge, or urinary flow. COPYRIGHT: (C)2009,JPO&INPIT