Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1974-11-25
1976-03-02
Segal, Robert
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
356104, G01N 2130, G01P 336
Patent
active
039414779
ABSTRACT:
This disclosure relates to an apparatus for measuring flow rates in gas sams and includes an optic component and an electronic component. The optic component starts with a focussed laser beam which is passed through a beam splitting prism so as to define two partial beams which, in turn, pass through a lens system so as to have two adjacent remote focal points. Particles in the gas stream passing through the focal points, which are located therein, reflect light in the form of reflected light beams which pass through a further lens system to pulse generators which, when actuated, generate a start pulse and a stop pulse with these pulses controlling the formation of a saw toothed wave controlling the amplitude of the generated wave, and the generated wave being directed to binary converter means and collector means which, in conjunction with an oscilliscope provides a visual wave having an amplitude indicative of a flow rate. The beam splitter is rotatable so as to selectively position one of the focal points within the gas stream with respect to the other so as to obtain a directional vector of the flowing gases.
REFERENCES:
patent: 3532427 (1970-10-01), Paine
patent: 3799671 (1974-03-01), Schweizer
patent: 3866055 (1975-02-01), Pike
Deutsche Forschungs-und Versuchsanstalt fur Luft-und Raumfahrt E
Segal Robert
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