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Leak detection method for gas, steam or the like based, in part, on the measurement of wind direction and velocity

  • US 5,390,530 A
  • Filed: 10/05/1993
  • Issued: 02/21/1995
  • Est. Priority Date: 03/05/1991
  • Status: Expired due to Fees
First Claim
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1. A method for estimating the position of leakage and a leakage quantity rate of gas, steam or the like through use of a detection system that includes a plurality of sampling modules arranged in a plant yard to collect samples of a surrounding atmosphere, at least one wind direction and velocity indicator for real-time determination of the direction and velocity of local wind, and at least one sensor module connected to each sampling module for receiving samples of the atmosphere collected by the sampling modules, the sensor modules having a built-in sensor to detect gas, steam or the like in atmosphere received from the sampling module, the method comprising:

  • estimating an area possibly including a point of leakage of gas, steam or the like with increasing accuracy over the passage of time by analyzing real-time fluctuations in wind direction data and data concerning a position of a sampling module which outputs a corresponding detection signal when the leakage of the gas, steam or the like is discovered;

    determining plane coordinates of the center of said area as the plane coordinates of the point of leakage when said area possibly including the point of leakage is narrowed to a relatively small area over the passage of time; and

    determining the leakage quantity rate by parallel analysis about a certain relational expression which can be established among at least the concentration measured by the sensor module, the wind direction and the wind velocity.

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