| 摘要 |
<p>The invention concerns a method for selectively detecting and locating leaks generated in pipes (1) made of non conductive material or electrically discontinuous, said pipes being inaccessible and designed to transport liquids (L). The method is characterised in that it consists in: (a) applying between the transported or stored liquid and the medium (2) making said piping inaccessible a continuous pulsed voltage; (b) moving in successive steps over the medium causing inaccessibility approximately following said piping (1) longitudinal axis a double potentiometric sensor consisting of two advantageously identical sensors (7, 8), maintained at a constant distance from each other and which are contacted at each step with the medium causing inaccessibility; and (c) observing and/or measuring at each successive position of the double sensor the electric signal emitted between the two sensors constituting it, a given leak being located between two successive positions of the double sensor between which an inversion of the signal is observed.</p> |
