| 摘要 |
PROBLEM TO BE SOLVED: To provide an obstruction detector having high versatility. SOLUTION: A sensor 10 sets the transmission frequency of an ultrasonic pulse signal to be set in a frequency regulation circuit 12 and the center frequency in filter processing of a filter circuit 15, in response to a frequency-setting frame transmitted from ECU 30. COPYRIGHT: (C)2006,JPO&NCIPI
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