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Last modified by robert on 2024/05/17 16:52
From version 6.4
edited by Sima Mousavi
on 2024/01/29 13:16
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To version 8.1
edited by Sima Mousavi
on 2024/01/29 14:42
Change comment: There is no comment for this version

Summary

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Title
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1 -Distributed Acoustic Sensing (DAS)
1 +integrated Distributed Acoustic Sensing (iDAS)
Content
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1 += **What is iDAS?** =
2 +
3 +**iDAS** stands for **Integrated Distributed Acoustic Sensing**. This advanced system utilizes the principle of Rayleigh backscattering in optical fibers to measure strain rates along the fiber's length. It's a cutting-edge technology predominantly used in fields like geophysics, where it's crucial for monitoring seismic activities, as well as in industrial applications like pipeline monitoring and security systems.
4 +
5 +=== **Safety first!** ===
6 +
7 +=== ===
8 +
9 +(% class="box warningmessage" %)
10 +The iDAS uses a Class 1 laser, which is generally considered safe for most applications. However, direct exposure to the eye should be avoided to prevent any risk of eye injury.
11 +\\Cables and fibers may create tripping hazards. Ensure that the routing of cables is done in a way that minimizes the risk of accidents.
12 +
13 +----
14 +
15 +=== **System Components** ===
16 +
17 +**Interrogator Unit**
18 +
19 +* The heart of the iDAS system, this unit contains the laser source, a detector for capturing backscattered light, and electronics to process this signal. It's critical for generating and interpreting the data collected by the optical fiber.
20 +
21 +**Optical Fiber**
22 +
23 +* This component acts as a long, distributed sensor. Strain rates along this fiber are what the iDAS system measures and analyzes.
24 +
25 +**Data Acquisition Software**
26 +
27 +* This software interfaces with the interrogator unit, allowing users to configure acquisition parameters, initiate data capture, and process the collected data.
28 +
29 += =
30 +
31 += =
32 +
1 1  = **DAS Data Collection System** =
2 2  
3 3  ==== **1. Interrogator Unit** ====
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29 29  * **Physical Location Determination:** The physical locations of these channels are ascertainable through methods like tap tests and GPS tracking.
30 30  * **Metadata for Channels:** Each channel or group of channels has its own metadata block, detailing specifics like location and properties.
31 31  
64 +[[image:1706489800616-982.png]]
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67 +
68 +[[image:1706488566274-805.png]]
69 +
32 32  ----
33 33  
34 34  = **DAS Metadata Schema** =
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284 -[[image:1706489800616-982.png]]
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288 -[[image:1706488566274-805.png]]
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293 293  [[Caption>>image:1706488806394-168.png]]
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