System for measuring position using electronic or ultrasonic dev

Details System for measuring position using electronic or ultrasonic dev System for measuring position using electronic or ultrasonic dev

1989-01-09

1990-10-16

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367902, G01S 1506

Patent

active

049641042

ABSTRACT:
A system for measuring the position of a moving object including transceiver means for sending signals to and receiving signals reflected from both a moving object and a reference object maintaining a known, fixed distance from the moving object, wherein by processing the signals sent and received, the position of the moving object can be determined while the effects of temperature on the speed of sound, frequency changes, false echoes and erroneous signals are minimized or eliminated.

REFERENCES:
patent: Re26826 (1970-03-01), Nolan
patent: 4542652 (1985-09-01), Reuter et al.
patent: 4543649 (1985-09-01), Head et al.
patent: 4576286 (1986-03-01), Buckley et al.
patent: 4634947 (1987-01-01), Magori
patent: 4713798 (1987-12-01), Kay
patent: 4739860 (1988-04-01), Kobayashi et al.

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