Distance measuring system using ultrasonic ranging

Details Distance measuring system using ultrasonic ranging Distance measuring system using ultrasonic ranging

1983-02-23

1986-03-04

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367910, G01S 1510, G01S 756

Patent

active

045743681

ABSTRACT:
A system for measuring the distance between two objects, for determining the center between two objects and for triangulating the height of a tall object. In measuring the distance between two objects, an initial count is started when a first ultrasonic pulse is transmitted. The initial count is stopped when that pulse is received. The second pulse is transmitted only after a delay interval where the delay interval begins at the start of the initial count and is substantially equal to the maximum range time of a transducer. The restarted count is stopped when the second pulse is received, and the resultant count is displayed as a number related to the total distance between the objects.

REFERENCES:
patent: 3174128 (1965-03-01), Dow et al.
patent: 3522764 (1970-08-01), Biber
patent: 3735334 (1973-05-01), Ahrens et al.
patent: 4206511 (1980-06-01), Ries et al.
patent: 4281404 (1981-07-01), Morrow, Jr. et al.

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