Buildup-robust density, level and interface measurement with...

Details Buildup-robust density, level and interface measurement with... Buildup-robust density, level and interface measurement with...

2008-03-24

2009-02-17

Thomas, Courtney (Department: 2882)

X-ray or gamma ray systems or devices

Specific application

Absorption

C378S057000, C378S086000, C378S089000

Reexamination Certificate

active

07492859

ABSTRACT:
System and methods for measuring the density, level, or interface position of a fluid or fluids in a vessel using gamma-ray backscatter are disclosed. The gamma-ray instruments disclosed may account for vessel wall buildup or deterioration. Methods disclosed herein include detecting gamma rays backscattered by a fluid from a gamma-ray source positioned proximate to a vessel with at least two gamma-ray detectors positioned proximate to the vessel and to each other; and determining a density, level, or interface value of the fluid based upon intensities of backscattered gamma rays received by the two or more gamma-ray detectors; wherein the vessel wall is subject to at least one of buildup and deterioration. The density, level, or interface may be a function of a ratio of the intensity of backscattered gamma rays received by two or more of the detectors.

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U.S. Office Action issued in corresponding U.S. Appl. No. 11/598,559; dated May 30, 2008; 11 pages.

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