Method and apparatus for measuring leaks in liquid storage vesse

Details Method and apparatus for measuring leaks in liquid storage vesse Method and apparatus for measuring leaks in liquid storage vesse

1981-01-05

1983-02-15

Corbin, John K.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 1102

Patent

active

043738150

ABSTRACT:
A method and apparatus for detecting and measuring leaks in liquid storage vessels, such as underground gasoline storage tanks. A laser source beam is divided into second and third beams which are reflected normally off of a reference surface and the liquid surface, respectively, in the storage vessel. The reflected beams are recombined and the recombined beam is analyzed over time to detect fringes and thereby measure changes in the liquid surface level in the storage vessel.

REFERENCES:
patent: 3511572 (1970-05-01), Peabe et al.
Harrison et al., "A New Interferometric Manometer", Metrologia, vol. 12, No. 3, pp. 115-120, 1976.

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