Data Acquisition Card for Distributed Acoustic Fiber Sensing (DAS) with Pulse Output sends TTL pulses directly to the AOM driver, eliminating the need for an additional pulse generator and greatly reducing system complexity.
GY-DAQA-2510 is a high-performance DAS dedicated data acquisition card, with dual-channel 1GSps synchronous trigger sampling, and comes with AWG function, which can generate 2-channel swept signal output for chirp pulse modulation.
The UNL-C-F-M-C34-13-7-1-0-0 is a narrow linewidth 1550nm laser module from YB Photonics. It features an ultra-narrow linewidth (<3kHz) making it ideal for distributed fiber optic sensing systems(DVS/DAS) and wind radar.
DTS-ETH-250M-2 is a special data acquisition card for DTS of distributed fiber optic temperature measurement system, which adopts Gigabit Ethernet port for data transmission and built-in averaging function with very high signal-to-noise ratio. Each channel supports a maximum of 32768 points acquisition, averaging up to 65536 times, 250M sampling rate, spatial resolution of 0.4 meters.
From the schematic diagram we can see that the distributed fiber optic vibration data monitoring system, using a balanced photodetector for coherent detection, and then need to IQ demodulation of the collected data, demodulation followed by phase unwinding to obtain the amplitude root phase data information.
Introduces the configuration of the pulsed laser for DTS temperature sensing, including how to set the ACC and APC modes, the trigger method and the pulse width parameters.
The fiber optic perimeter intrusion monitoring system realizes fiber optic vibration sensing and monitoring based on the basic principle of Rayleigh scattering, combined with φ-OTDR (Phase Sensitive Optical Time Domain Reflection) technology and signal analysis and processing algorithms.
The PZT was used to test the Distributed Fiber Optic Acoustic Sensing System DAS at a location of 50KM, using a repetition frequency of 2000Hz, capable of testing signals at 980Hz.
Introduction of data acquisition card for distributed fiber optic vibration monitoring system, 100M sampling rate, PCIe interface with demodulation algorithm.
distributed fiber optic sensing systems have been widely used in various fields. Distributed fiber optic sensing system uses optical fiber as a sensing element, thus realizing distributed measurement of physical quantities.
How long can a distributed fiber optic vibration sensing system monitor? In the laboratory it can support 80km, in the application site to consider the light decay and other reasons, the maximum available 60km.
The type of fiber used for distributed fiber optic vibration sensing is single-mode G652, which is a very common fiber, all in our communication fiber optic cable, and is not expensive.