Abstract
A novel real-time location method for long distance dual Mach-Zehnder(M-Z) interferometric vibration sensor is proposed. First, staring point of vibration signal is found by discrete wavelet decomposition, then effective data domain is got from original signal, and finally cross-correlation delay estimations is carried out. The method can reduce the impact of coherent noise and interference effectively while significantly increasing the operation speed. Field test on 30.498 km general outdoor cable proves that the method achieves a location accuracy of 50 m in the case of 2 MHz sample rate and running time is less than 1 s.
| Original language | English |
|---|---|
| Pages (from-to) | 1020-1024 |
| Number of pages | 5 |
| Journal | Guangdianzi Jiguang/Journal of Optoelectronics Laser |
| Volume | 20 |
| Issue number | 8 |
| Publication status | Published - Aug 2009 |
| Externally published | Yes |
Keywords
- Discrete wavelet decomposition
- Dual Mach-Zehnder(M-Z) interferometric vibration sensor
- Real-time location method