Ultrasonic distance measuring apparatus

Details Ultrasonic distance measuring apparatus Ultrasonic distance measuring apparatus

1983-04-25

1986-04-08

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Distance or direction finding

367902, G01S 1510

Patent

active

045817260

ABSTRACT:
In an ultrasonic distance measuring apparatus producing distance data representing a distance to an object by transmitting and receiving an ultrasonic wave, a sensor detects variation in the temperature and/or humidity of the atmosphere, and a compensator compensates for variation in propagation characteristic of the ultrasonic wave caused by the variation in the temperature and/or humidity respectively.

REFERENCES:
patent: 4307456 (1981-12-01), Ise et al.

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