Share Email Print
cover

Proceedings Paper

Perimeter security system based on fiber optic disturbance sensor
Author(s): Tian Lan; Chunxi Zhang; Lijing Li; Guangming Luo; Chen Li
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

The design and field test of a perimeter security system based on fiber optic disturbance sensor was described. The system consisted of fiber optic disturbance sensor and control computer. The fiber optic disturbance sensor was in Mach-Zehnder interferometer configuration using single mode fiber cable, which made the system relatively low cost. A digital Phase Generated Carrier (PGC) demodulation technique was used to eliminate phase drifts in the interferometric sensor. The demodulator was based on Field Programmable Gate Array(FPGA) and Digital Signal Processor(DSP). A prototype system with 1Km sensing cable was constructed and tested. The sensing cable was bound on the fence to detect disturbance generated by intruder. The test result verified that this sensor was sensitive to intrusion behavior. Typical disturbance signal was recorded when intrusion behavior was going on. There was obvious characteristic in the recorded signal. Intrusion behavior generated non-stable random signal, which had many amplitude peaks. And the frequency was below 500Hz. This was helpful for recognition algorithms development. Wind in the test field also generated low frequency background noise and increased recognizing difficulties.

Paper Details

Date Published: 26 November 2007
PDF: 6 pages
Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 68300J (26 November 2007); doi: 10.1117/12.756541
Show Author Affiliations
Tian Lan, Beijing Univ. of Aeronautics and Astronautics (China)
Chunxi Zhang, Beijing Univ. of Aeronautics and Astronautics (China)
Lijing Li, Beijing Univ. of Aeronautics and Astronautics (China)
Guangming Luo, Beijing Univ. of Aeronautics and Astronautics (China)
Chen Li, Beijing Univ. of Aeronautics and Astronautics (China)


Published in SPIE Proceedings Vol. 6830:
Advanced Sensor Systems and Applications III
Yun-Jiang Rao; Yanbiao Liao; Gang-Ding Peng, Editor(s)

© SPIE. Terms of Use
Back to Top