Method of monitoring heat exchanger vibrations
US5327783A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1993 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Oct 21, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/044
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A non-intrusive vibration measurement system and method using commercial ultrasonic instruments together with digital signal filtering and analysis techniques is adapted to quantitatively detect vibrations as small as 0.04-inch peak-to-peak. The system and its methodology is used for in-service vibration monitoring of internal components of check valves, pumps, nuclear reactors, steam generators and heat exchangers, especially when the vibration frequency is too low for quantitative analysis by accelerometers and when the strain induced is too low for strain gauge analysis, and when the vibrating component is in an "encased" environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.