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Method and device for diagnosing tank leaks using a reference measuring method

  • US 6,845,652 B2
  • Filed: 06/24/2002
  • Issued: 01/25/2005
  • Est. Priority Date: 06/22/2001
  • Status: Active Grant
First Claim
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1. A method for leak testing a vessel, comprising the steps of:

  • introducing one of a positive pressure and a partial vacuum into the vessel;

    detecting a variation over time of the one of the positive pressure and the partial vacuum in order to perform a leak-tightness measurement on said vessel and a corresponding reference measurement on said vessel using a reference leak in fluid communication with the one of the positive pressure and the partial vacuum;

    determining a presence of a leak in the vessel by comparing results of the leak-tightness measurement and the reference measurement;

    wherein during the leak-tightness measurement and the reference measurement, the one of the positive pressure and the partial vacuum is detected using a single pressure measuring device;

    and wherein the vessel and the reference leak are alternately subjected to the one of the positive pressure and the partial vacuum; and

    detecting and comparing respective resulting pressure variations upstream from a pressure source to one another, from which a determination is made as to leak-tightness of the vessel.

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