| 摘要 |
The invention relates to a method for determining and optionally locating leakage points in pipelines (1), which are used to transport liquid or gaseous media, by means of at least one electric conductor (2) that runs along the extension of the pipeline (1) from a starting point to an end point. According to the invention, a defined test voltage (U<SUB>M</SUB>, u<SUB>L</SUB>) is applied between two electric conductors (2), or between one electric conductor (2) and the pipeline (1) and the resistance or impedance behaviour between the starting and end points of the two conductors (2), or between the conductor (2) and the pipeline (1) is determined when the pipeline (1) is intact. The resistance or impedance behaviour is then determined using the same test voltages (U<SUB>M</SUB>,u<SUB>L</SUB>) at later points in time and is compared with the resistance or impedance behaviour that is known for the intact pipeline (1). The presence of a leakage point can be ascertained from the deviation of the resistance or impedance behaviour that has been determined at the later points in time from that of the intact pipeline (1). |
