Optical Fiber Demodulation System with High Performance for Assessing Fretting Damage of Steam Generator Tubes
| Autor: | Jie Zhang, Zhide Xi, Ning Wang, Peijian Huang, Yong Zhu, Junying Li |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
optical fiber
Optical fiber Materials science Acoustics Fretting 02 engineering and technology lcsh:Chemical technology 01 natural sciences Biochemistry Article Analytical Chemistry law.invention fiber Fabry-Perot sensor 010309 optics law 0103 physical sciences Demodulation lcsh:TP1-1185 Electrical and Electronic Engineering Instrumentation F-P signal demodulation Bandwidth (signal processing) Boiler (power generation) 021001 nanoscience & nanotechnology Piezoelectricity Atomic and Molecular Physics and Optics Transducer Mode coupling steam generator tube 0210 nano-technology |
| Zdroj: | Sensors (Basel, Switzerland) Sensors; Volume 18; Issue 1; Pages: 201 Sensors, Vol 18, Iss 1, p 201 (2018) |
| ISSN: | 1424-8220 |
| Popis: | In order to access the fretting damage of the steam generator tube (SGT), a fast fiber Fabry-Perot (F-P) non-scanning correlation demodulation system based on a super luminescent light emitting diode (SLED) was performed. By demodulating the light signal coming out from the F-P force sensor, the radial collision force between the SGT and the tube support plate (TSP) was interrogated. For higher demodulation accuracy, the effects of the center wavelength, bandwidth, and spectrum noise of SLED were discussed in detail. Specially, a piezoelectric ceramic transducer (PZT) modulation method was developed to get rid of the interference of mode coupling induced by different types of fiber optics in the demodulation system. The reflectivity of optical wedge and F-P sensor was optimized. Finally, the demodulation system worked well in a 1:1 steam generator test loop and successfully demodulated a force signal of 32 N with a collision time of 2 ms. |
| Databáze: | OpenAIRE |
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