The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 20, 2004
Filed:
Aug. 09, 2001
Kanji Isomichi, Nagoya, JP;
Yuuzi Terada, Kobe, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A radio wave transmitter transmits a transmission command to an artificial fish in a water tank. A radio wave receiver in the artificial fish outputs the received transmission command to an ultrasonic transmitter so that the ultrasonic transmitter is caused to transmit ultrasonic transmission pulses. The ultrasonic transmission pulses are received by reception devices in the water tank, and a reception signal thereof is supplied to a propagation time clock generator. The propagation time clock generator generates propagation time clock pulses according to ultrasonic propagation times from the artificial fish to the reception devices. The propagation time clock pulses are counted by a pulse counter, and a count value thereof is inputted to an arithmetic operation control portion to obtain a propagation time, thereby calculating a three-dimensional position of the artificial fish.