WAVE MOTION SENSOR, WAVE MOTION SENSING METHOD, AND SENSOR SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a wave motion sensor capable of achieving low costs, satisfactory maintainability, improvement in reliability, compactness of external size, and improvement in the degree of freedom in installation and performing a wide range of sensing.;SOLUTION: The three antennas of a first antenna 1a; a second antenna 1b; and a third antenna 1c are provided and constituted in such a way so as to share the generation of signals for transmission waves and the processing of detecting reception waves. One of the antennas is selected by a selection command part 11. On the basis of a selection command by the selection command part 11, a selection part 2 transmits the signals for transmission waves to the selected antenna and signals by reception waves received by the selected antenna to a detection part 4 and a level determining part 5.;COPYRIGHT: (C)2004,JPO