Method and device for detecting changes in the mechanical state of the members of a structure implanted in the sea
US4400980A · kind A · utility
8Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1981 |
| Grant date | Aug 30, 1983 |
| Priority date | — |
| Expiry date | Aug 31, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M7/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method and device for detecting changes in the mechanical state of the members of a structure implanted in the sea, whereby each member is subjected to impacts and after each impact, the simultaneous signals of excitation and dynamical response of the member are recorded, the signals of identical frequency being processed in order to define a ratio which varies with the frequency and presents peaks. The aforesaid operations are repeated at regular intervals, a watch being kept for any shifts in the peaks which could indicate a change in the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.