1.Basic principles and product introduction

The light source emits near-infrared laser pulses into the sensing fiber, and when the laser pulse propagates in the forward direction along the optical fiber, it is partially reflected by the dense ultra-weak grating sensor array connected in series on the optical fiber, and these reflected signals are detected and analyzed in real time after returning back along the same optical fiber, and the strain field, temperature field and deformation of the structure can be retrieved quickly. The module has a built-in Xilinx ARM chip, which supports remote operation, configuration and data acquisition, power-on self-start, and obtains the position and temperature or strain value of each sensor after the underlying calculation,and transmits it back via Ethernet.

2.Product advantages

(1)Strong spatial resolution,allowing time-division wavelength division multiplexing, the highest spatial resolution capacity is 0.lm.

(2)The demodulation speed is fast and the real-time performance is high.

(3)It can collect 20,000 measurement points at the same time,and the system has high integration.

(4)Multi-channel expansion to achieve centralized testing of multiple test lines.

(5)Modular design, low system power consumption,field testing and networking is simple.

3.Typical applications

(1)Monitoring of structural deformation in civil engineering and smart roads, buildings, etc.

(2)Strain monitoring of geological hazards.

4.Product indicators