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

Summary

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1 -integrated Distributed Acoustic Sensing (iDAS)
1 +Distributed Acoustic Sensing (DAS)
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 -
33 33  = **DAS Data Collection System** =
34 34  
35 35  ==== **1. Interrogator Unit** ====
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61 61  * **Physical Location Determination:** The physical locations of these channels are ascertainable through methods like tap tests and GPS tracking.
62 62  * **Metadata for Channels:** Each channel or group of channels has its own metadata block, detailing specifics like location and properties.
63 63  
64 -[[image:1706489800616-982.png]]
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68 -[[image:1706488566274-805.png]]
69 -
70 70  ----
71 71  
72 72  = **DAS Metadata Schema** =
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328 328  [[Caption>>image:1706488806394-168.png]]
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