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Title:
SWIMMING BODY IN WATER VESSEL, AND CONTROLLER AND POSITION MEASURING INSTRUMENT THEREFOR
Document Type and Number:
Japanese Patent JP2002055154
Kind Code:
A
Abstract:

To highly precisely measure the three-dimensional positions of a swimming body swimming in a water vessel, using an ultrasonic wave.

A radio wave transmitter 18 transmits a transmission command to an artificial fish 3 inside the water vessel 1. A radio wave receiver 5 inside the fish 3 outputs the received transmission command to an ultrasonic transmitter 8 to transmit an ultrasonic transmission pulse T. The pulse T is received by receivers 11a-11c inside the water vessel 1, and received signals A1-A3 are input to a propagation time clock generator 14. The generator 14 generates propagation time clock pulses C1-C3 corresponding to ultrasonic propagation times t1-t3 from the fish 3 upto the receivers 11a-11c. The pulses C1-C3 are counted by a pulse counter 16, and counted values are input to an operation control part 17, and the propagation times t1-t3 are found to calculate three- dimensional positions x, y, z of the fish 3.


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Inventors:
ISOMICHI KANJI
TERADA IKUJI
Application Number:
JP2000242845A
Publication Date:
February 20, 2002
Filing Date:
August 10, 2000
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
A63H23/10; G01B17/00; G01S5/30; G01S11/16; (IPC1-7): G01S5/30; A63H23/10; G01S11/16
Attorney, Agent or Firm:
Takehiko Suzue (5 outside)