Self-calibrating ultrasonic range finder

Details Self-calibrating ultrasonic range finder Self-calibrating ultrasonic range finder

1984-12-13

1988-01-12

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

367 99, 367151, 367902, G01S 966, G01S 968

Patent

active

047196050

ABSTRACT:
A self-calibrating ultrasonic distance sensing method and apparatus are disclosed in which a transducer periodically transmits a pair of bursts of acoustic energy along an acoustic path toward a target object. Echoes of the first acoustic burst in the burst pairs from a reference target at a known distance from the transducer are used for calibration purposes, and echoes of the second acoustic bursts in the pairs are used to determine distance to the target object.

REFERENCES:
patent: 4122427 (1978-10-01), Karsh
patent: 4170765 (1979-10-01), Austin et al.
patent: 4358835 (1982-11-01), Fage
patent: 4380807 (1983-04-01), Reynard
patent: 4464738 (1984-08-01), Czajkowski
patent: 4549286 (1985-10-01), Langeraar et al.
patent: 4580251 (1986-04-01), Koukovinis

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