| 摘要 |
The method is used to monitor and/or check a pressure device having a tubular cavity enclosed by a wall (W), namely a device for conducting and/or holding a fluid. For this purpose, the method comprises a step of detecting both an elongation of a first wall segment (WS1) of the wall and an elongation of at least one second wall segment (WS2) of the wall lying at a distance from the wall segment (WS1) in order determine an elongation deviation value (&KHgr;&Dgr;&egr;) representing a difference between the elongation of the wall segment (WS1) and the elongation of the wall segment (WS2) and a step of using the elongation deviation value (&KHgr;&Dgr;&egr;) to determine damage to the wall, for example as the result of plastic deformation of the wall and/or as the result of wear of the wall. The measuring system according to the invention comprises, in addition to the pressure device, a first elongation sensor (61) fixed to the wall segment (WS1) for producing a first elongation signal (d1) dependent on an elongation of the wall segment (WS1) that varies over time and at least a second elongation sensor (62) fixed to the wall segment (WS2) for producing a second elongation signal (d2) dependent on an elongation of the wall segment (WS2) that varies over time. The measuring system also comprises transforming electronics electrically coupled to both the first elongation sensor and the second elongation sensor, which transforming electronics are designed to receive both the elongation signal (d1) and the elongation signal (d2) and to determine said damage to the wall by using the elongation signals (d1, d2). |
