Patent Number: 6,167,749

Title: Method and apparatus for automatically detecting gas leak, and recording medium for leak detection

Abstract: A method of the present invention automatically detects gas leak from a valve on a gas-containing vessel, or the like, based on detected absolute pressure and pressure fluctuation. The method can detect both fine leak and gross leak. The method comprises a method for automatically detecting gas leak from a target object provided on gas piping comprising the steps of: issuing command for forming an airtight room communicating with said target object; issuing command for pressurizing said airtight room until a predetermined pressure; detecting absolute pressure and pressure fluctuation of said airtight room, measured with a gauge; and discriminating whether gas leaks from said target object or not based on the detected absolute pressure and pressure fluctuation.

Inventors: Yanagisawa; Takahiro (Hamamatsu, JP), Hirota; Naoshi (Hamamatsu, JP)

Assignee: Yamaha Corporation

International Classification: G01M 3/28 (20060101); G01M 003/32 (); G01M 003/26 (); F17D 003/00 (); G01N 027/04 ()

Expiration Date: 01/02/2018