Apparatus and method for measuring frequency of coherent compone

Details Apparatus and method for measuring frequency of coherent compone Apparatus and method for measuring frequency of coherent compone

1987-04-23

1989-06-27

Chin, Gary

Boots, shoes, and leggings

356 28, 340606, 364565, G01P 336

Patent

active

048435643

ABSTRACT:
A Doppler velocimeter having laser generating crossing light beams provides a crossing and focus area forming a measuring volume having regions of high and low light intensity. Solid or liquid particles moving through the measuring volume scatter light which is sensed and converted into a signal having a frequency. A signal processor measures the frequency by detecting and tracking an individual zero crossing of a particle through the measuring volume to provide real time information about the coherent component of the signal. This information is useable to determine the velocity of the particle moving through the measuring volume.

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