分布式光纤传感数据采集系统设计

doi:10.3976/j.issn.1002-4026.2017.06.011

SHANDONG SCIENCE ›› 2017, Vol. 30 ›› Issue (6): 65-70.doi: 10.3976/j.issn.1002-4026.2017.06.011

• Optical Fiber and Photonic sensingtechnology • Previous Articles Next Articles

Design of data acquisition system for distributed optical fiber sensor

NAN Gang-yang, WAN Qi-wu, SUN Ji-hua，GUO Rui, ZHANG Zhen-zhen, JU Yang

Laser Research Institute，Shandong Academy of Sciences, Jinan 250103, China

Received:2017-06-12 Online:2017-12-20 Published:2017-12-20

Abstract

Abstract:

Based on the Raman scattering temperature effect and the optical time domain reflection technology, a 100 MHz highspeed data acquisition system SDLaser_DAQ600 was developed to measure the temperature field of space environment. In the data acquisition system, using real time averaging algorithm in the FPGA, DAQ600 has realized 65 536 times cumulative averaging for original fiber sensor signals, which supported realtime sampling of 10 km length fiber with 1 m spatial resolution.The experimental results show that, signaltonoise ratio for optical fiber sensing can be increased to more than 90 dB through the 65 536 times cumulative averaging. Finally, smooth curves of Stokes and antiStokes have been obtained, which could provide proper data support for distributed temperature system measurement.

Key words: optical fiber sensor, data acquisition, Raman scattering

CLC Number:

TP274⁺.2

NAN Gang-yang, WAN Qi-wu, SUN Ji-hua，GUO Rui, ZHANG Zhen-zhen, JU Yang. Design of data acquisition system for distributed optical fiber sensor[J].SHANDONG SCIENCE, 2017, 30(6): 65-70.

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Design of data acquisition system for distributed optical fiber sensor

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