| 摘要 |
FIELD: physics. ^ SUBSTANCE: detector includes an electroacoustic transducer (1), an amplifier (2), a channel for analysing the low-frequency region of the noise spectrum, having a band-pass filter (3) and a detector (4), a channel for analysing the high-frequency region of the noise spectrum, having a band-pass filter (5) and a detector (6), a channel for determining the level of the noise signal, having an adder (11) and a comparator circuit (12), a divider (7), a comparator circuit (8), a controlled switching circuit (9), a logic OR element (10), a comparator circuit (13) and pipe burst signalling device (14). ^ EFFECT: high reliability of detecting pipe burst. ^ 1 dwg |
