Ultrasonic anemometer

Details Ultrasonic anemometer Ultrasonic anemometer

1989-03-03

1990-01-02

Ruehl, Charles A.

Measuring and testing

Navigation

Leeway incidence or side-slip

G01W 104

Patent

active

048904880

ABSTRACT:
In the ultrasonic anemometer, ultrasonic emitting probes (E1-E4) and receiving probes (R1-R4) are mounted to define at least three different paths for propagation of ultrasonic signals in the air, and means (20) are provided for measuring the ultrasonic signal propagation time along the different paths and for calculating the direction and the speed of the wind based upon these measurements. The emitting and receiving probes are low frequency probes, the emitting probes producing a predetermined wave train type signal of frequency between 10 and 200 kHz; and the measuring and calculating means include means for measuring propagation time by correlation between the emitted and received signals.

REFERENCES:
patent: 3435677 (1969-04-01), Gardner
patent: 3633415 (1972-01-01), Luce
patent: 4174630 (1979-11-01), Nicoli
patent: 4262545 (1981-04-01), Lamarche et al.
patent: 4576047 (1986-03-01), Lauer et al.
patent: 4787252 (1988-11-01), Jacobson et al.
D. J. Cathignol, "Signal-To-Clutter Ratio in Pseudo Random Doppler Flowmeter" Ultrasonic Imaging 8, pp. 272-284, Oct. 1986.

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