| 摘要 |
PURPOSE: A leakage sensing apparatus for a boiler tube is provided to simultaneously and accurately sense signals of low and high frequency bands due to the tube leakage an initial leakage step. CONSTITUTION: The leakage sensing apparatus senses waves generated due to the leakage from the boiler tube through an acoustic sensing unit(21), and amplifies the sensed waves using an amplifier to analyze in a control unit, thereby sensing the leakage points and leakage amount. The acoustic sensing unit(21) comprises a transfer bar(41) fused to a wall of the boiler tube, and an acoustic sensor(43) coupled to one end of the transfer bar(41). Further, many acoustic sensing units(21) are attached to a plurality of points of the boiler tube, thereby simultaneously sensing signals of low and high frequency bands due to the tube leakage.
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