| 摘要 |
A leak detection system and method are disclosed in which an electrical circuit uses time domain reflectometry to monitor one or more leak detection cables for impedance changes which are caused when a cable is contacted by a leaking liquid. A cable is monitored by transmitting a single electrical pulse down its length and then comparing the reflected signal to a predetermined leak detection threshold. If the threshold is exceeded, then a fault is indicated. For each transmitted pulse, only a selected portion of the cable is monitored for reflections. This selective monitoring is achieved by moving a time window along the cable. Each time window position may have a unique leak detection threshold. |
