- 250M DAS Data Acquisition Card C Call Example
- DAS capture card Python call example
- API Documentation
- Driver Installation Guide For Windows
- Driver Installation Guide For Linux
- DAS Capture Card Trigger Output TTL Is How Much V
- What is the temperature range for normal DAS DAQ operation?
- What algorithms are built into DAS data acquisition cards?
- Does it support 10 Gigabit optical interfaces?
- Does the DAS data acquisition card require an external power supply?
- Mechanical dimensions of the 250M DAS capture card
- WXG-DAQ-2480 capture card function call flow
What algorithms are built into DAS data acquisition cards?
We have built the IQ demodulation algorithm into the DAQ board for the application characteristics of distributed fiber optic acoustic sensing system (DAS).
The demodulation process of a fiber optic sensing DAS system with the usual coherent optical path is
1. Perform IQ demodulation
2、unwrap the phase and then get the vibration signal.
If we demodulate through FPGA in the acquisition card we can speed up the demodulation computation and make the system computational pressure reduced.
Due to the limited resources of FPGA, so at present we only do the IQ demodulation in the DAQ board, and the phase unwrapping still needs to be realized by the user in the software.