Method for determining direction of travel of a wave front and a

Details Method for determining direction of travel of a wave front and a Method for determining direction of travel of a wave front and a

1992-10-16

1995-03-21

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 491, 73 495, G01M 328

Patent

active

053985427

ABSTRACT:
Direction of travel from a wave front in a pipeline is determined with two pressure sensors spaced relatively near to each other so that the site from which the wave front emanated is not located therebetween. For each sensor, a determination is made as to whether a detected signal has exceeded a negative or a positive threshold. In addition, the sensor outputs are subtracted from each other to determine which sensor detected the wave front first. Combining the resulting signals yields information on the nature of the wave front and its direction of travel.

REFERENCES:
patent: 3851521 (1974-12-01), Ottenstein
patent: 3903729 (1975-09-01), Covington
patent: 3952759 (1976-04-01), Ottenstein
patent: 4012944 (1977-03-01), Covington et al.
patent: 4091658 (1978-05-01), Covington et al.
patent: 4144743 (1979-03-01), Covington et al.
patent: 4796466 (1989-01-01), Farmer
Brochure titled "Introducing the Pressure Watch", published Jun., 1989.
"Line Break Detection and Testing Method", Y. S. Chan, a paper presented Oct. 16-17, 1980 at Pipeline Simulation Interest Group (PSIG).
"Wavealert, a new technological breakthrough that detects a pipeline leak sooner rather than later", 1980.
"Pipeline leak detection techniques" by N. C. Butler, pp. 24-29 in Journal of Pipes & Pipelines International, vol. 27, No. 2, Apr. 1982.

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