Gas velocity meter

Details Gas velocity meter Gas velocity meter

1977-08-31

1980-05-06

Buczinski, S. C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

73194E, G01P 336, G01F 100

Patent

active

042014670

ABSTRACT:
A flow velocity meter is described suitable for measuring the mean flow velocity of a medium flowing along a duct using optical means which generates first and second beams of light each in the form of a relatively shallow wide band which traverse the duct across first and second spaced apart transverse planes which are arranged substantially at right angles to the mean flow direction. Light beams emerging from the duct are received on respective photoelectric detectors the output signals of which are essentially identical but relatively displaced because of the time required for the medium to flow between the two planes. By processing the signals in a correlation circuit this time is established and is used to produce an output proportional to the mean flow velocity of the medium between the two planes. The correlation circuit used is based on digital techniques.

REFERENCES:
patent: 2769492 (1956-11-01), Ostergren et al.
patent: 3413850 (1968-12-01), Merrifield
patent: 3558898 (1971-01-01), Block et al.
patent: 3799671 (1974-03-01), Schweizer
patent: 3804517 (1974-04-01), Meyr et al.
patent: 3832059 (1974-08-01), Iten
V.O. Petrak et al., Experimental-Technik der Physik, XXII, 1974, vol. 6, pp. 605-612.

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