| 摘要 |
PURPOSE: A device for detecting pin holes on a vessel is provided to allow the device to operate at a low voltage by using a microphone, while achieving improved operating stability. CONSTITUTION: A device comprises an air injection pipe(20) inserted into an object vessel(10); a pressure unit connected to the air injection pipe, and which blows air into the object vessel; a branch pipe(30) branched off from the air injection pipe in the outside of the object vessel; a microphone(40) mounted on the branch pipe, and which detects the sound leaked from pin holes(H) of the object vessel, converts the detected sound into an electrical signal and outputting the electrical signal; and an alarm unit(60) for receiving the electrical signal from the microphone, and generating alarm signals.
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