Natural gas leak mapper

United States Patent

May 20, 2008
View the Complete Patent at the US Patent & Trademark Office
Portable Gas Leak Detection System
A system is described that is suitable for use in determining the location of leaks of gases having a background concentration. The system is a point-wise backscatter absorption gas measurement system that measures absorption and distance to each point of an image. The absorption measurement provides an indication of the total amount of a gas of interest, and the distance provides an estimate of the background concentration of gas. The distance is measured from the time-of-flight of laser pulse that is generated along with the absorption measurement light. The measurements are formated into an image of the presence of gas in excess of the background. Alternatively, an image of the scene is superimosed on the image of the gas to aid in locating leaks. By further modeling excess gas as a plume having a known concentration profile, the present system provides an estimate of the maximum concentration of the gas of interest.
Reichardt; Thomas A. (Livermore, CA), Luong; Amy Khai (Dublin, CA), Kulp; Thomas J. (Livermore, CA), Devdas; Sanjay (Albany, CA)
Sandia Corporation (Livermore, CA)
March 11, 2005
356/437 ; 250/330;
G01N 21/01 (20060101); G01N 21/00 (20060101);
356/437 372/22 250/334,338.5
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The United States Government has rights in this invention pursuant to Contract No. DE-AC04-94AL85000 between the United States Department of Energy and Sandia Corporation for the operation of Sandia National Laboratories.