| 摘要 |
PCT No. PCT/SE81/00230 Sec. 371 Date Apr. 19, 1982 Sec. 102(e) Date Apr. 19, 1982 PCT Filed Aug. 18, 1981 PCT Pub. No. WO82/00718 PCT Pub. Date Mar. 4, 1982.A process for monitoring the presence of cracks, formation of cracks and growth of cracks in constructions, for example off-shore oil and gas platforms, by recording and analysis of acoustic emissions from the construction, the sensors being mounted in the medium which surrounds the construction instead of on or in the construction itself. |
