Optical velocimeter probe

Details Optical velocimeter probe Optical velocimeter probe

1997-06-16

1999-01-12

Hellner, Mark

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

G06F 15332

Patent

active

058596941

ABSTRACT:
An optical velocimeter probe a device to illuminate a volume of measurement in which there may pass particles, and an optical detector to produce an electrical signal x(t) in response to the passage of a particle in the illuminated volume. It also includes a device to extract information representing the velocity v of particles from the electrical signal, including, in particular, a device to convert the electrical signal x(t) into a complex signal .sub.x (t), an apparatus to set up a self-correlation function r.sub.x (m) of the signal x(t), and a device to estimate the velocity v from the computation of the phase .phi..sub.x (m) of the function r.sub.x (m).

REFERENCES:
patent: 3738750 (1973-06-01), Kalb et al.
patent: 4899289 (1990-02-01), Appel
patent: 5005144 (1991-04-01), Nakajima et al.
patent: 5289391 (1994-02-01), Ibrahim et al.
patent: 5383024 (1995-01-01), Maxey et al.
Patent Abstracts of Japan, vol. 12, No. 411., Oct. 31, 1988, & JP 63-147265, Jun. 20, 1988.
Patent Abstracts of Japan, vol. 17, No. 36, Jan. 22, 1993, & JP 4-254768, Sep. 10, 1992.

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