| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrasonic leak quantity measuring device capable of measuring an exact leak quantity. SOLUTION: The ultrasonic leak quantity measuring device comprises an ultrasonic microphone 7 having directivity, an input part and simultaneously an operation part 17 for inputting leak position information, a memory 29 storing in advance the relation between a sound pressure level and a leak quantity at every leakage location, a CPU30 calculating leak quantity from the sound pressure level detected based on the memory relation at the memory 29 and input leak position information, and an indicator 16 indicating the leak quantity calculated with the CPU30. By calculating the leak quantity from the relation between the sound pressure level at every leak position and the leak quantity, the leak quantity can be exactly measured.
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