PROBLEM TO BE SOLVED: To provide an ultrasonic three-dimensional distance measurement apparatus and an ultrasonic three-dimensional distance measurement method for accurately measuring a three-dimensional position and a three-dimensional shape of an object without threshold determination.;SOLUTION: The ultrasonic three-dimensional distance measurement apparatus for measuring the three-dimensional position and the three-dimensional shape of the object comprises: an ultrasonic transmitting element for transmitting ultrasonic waves; a plurality of ultrasonic receiving elements 1; an amplification means 2; an A-D conversion means 3; a direct wave removing means 4; a signal strength changing means 5; a noise removing means 6; a delay means 7; a multiplication means 8; and a three-dimensional position calculating means 9 as main components. The signal strength changing means 5 performs half-wave rectification processing of a fourth received signal S4.;COPYRIGHT: (C)2010,JPO&INPIT
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