| 摘要 |
<p>The purpose of the present invention is to provide a leak detection device which achieves a reduction in processing time. This leak detection device comprises a leak detection cable (11) which is laid along a pipeline and has a characteristic impedance that is changed by infiltration of liquid leaking from the pipeline, a leak detection pulse signal generation unit (33) which generates a leak detection pulse signal incident on the leak detection cable, a storage unit (23) which stores data indicating the correlation between the propagation distance of a reflected wave and the attenuation of the reflected wave, an amplification factor variable gain amplifier (53) which is a gain amplifier for amplifying the reflected wave of the leak detection pulse signal in synchronization with a sampling signal repeated with a predetermined sampling period, and changes the amplification factor of the reflected wave on the basis of data; and an A/D conversion unit (61) which samples the amplified reflected wave of one leak detection pulse signal in synchronization with the sampling signal multiple times and converts the sampled reflected wave into a digital signal.</p> |
