Process and apparatus for monitoring the pressure prevailing in

Details Process and apparatus for monitoring the pressure prevailing in Process and apparatus for monitoring the pressure prevailing in

1988-09-28

1990-03-13

Williams, Hezron E.

Measuring and testing

Testing sealed receptacle

73705, G01N 2100, G01L 900

Patent

active

049074431

ABSTRACT:
In a purely optical process for monitoring the pressure prevailing in a container without contact with the container, the cap of the container is illuminated by an incident beam and a reflected monitoring beam is obtained; the latter is intercepted by a diffusing support, making it possible to obtain a spot of light observed by a linear video camera. The video signal representing the pressure, after conversion into an electric output signal, makes it possible to monitor or measure continuously the pressure in the container.

REFERENCES:
patent: 4499373 (1985-02-01), Johnston
patent: 4606635 (1986-08-01), Miyazawa et al.
patent: 4735508 (1988-04-01), Bellio
Willard E. Buck et al., "Dynamic Pressure Measurement by Optical Interference", The Review of Scientific Instruments, vol. 19, No. 10, Oct. 1948, pp. 678-684.
Japanese Patent Abstract, vol. 9, No. 323 (P-414)[2046], Dec. 18, 1985.

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