Distributed Strain, Temperature and Acoustic seNsing Suite (DiSTANS)

分布式应变、温度和声学传感套件 (DiSTANS)

• 批准号: NE/X005925/1
• 负责人: Jessica Johnson
• 金额: $ 57.91万
• 依托单位: University of East Anglia
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FX005925%2F1
• 关键词: Distributed; Strain; Temperature; Acoustic; seNsing

The DiSTANS project will use state-of-the-art technology to provide a brand-new method of monitoring changes underground. This offers the possibility of game-changing data capture to examine subsurface processes. This method uses fibre optic cables similar to those used in telecommunications, to get data from underground at a speed and density that far exceeds traditional monitoring technology. The optical fibres in the cables have small imperfections in them. The new technology shoots a pulse of light along the fibres, which reflects off the imperfections and returns to the recorder. The tiny differences in the time that the light takes to return will tell us about very small vibrations, temperature changes and movements around the underground cable. Because the cable is the sensor, we can monitor the underground conditions for up to 15 km and see differences along the cable as close together as 25 cm. These measurements are taken one hundred thousand times each second, which means that very quick changes can also be measured.This new technology, called distributed strain, temperature and acoustic sensing suite, can be used in many different places. It can be used to monitor volcanoes and earthquakes, but can also be used to keep track of traffic and people walking. For the first project, we will be installing the DiSTANS system on the North Norfolk coast, where the sea erodes the coast at a rate of 10 cm per year, threatening people's houses and businesses, and posing a danger for people and wildlife who use the coast. We will monitor small cracking and slumping before landslides, and how these are affected by temperature changes each day and season.

DiSTANS项目将利用最先进的技术提供监测地下变化的全新方法。这提供了改变游戏规则的数据捕获以检查地下过程的可能性。这种方法使用类似于电信中使用的光纤电缆，以远远超过传统监测技术的速度和密度从地下获取数据。电缆中的光纤有一些小缺陷。新技术沿着纤维发射光脉冲，反射掉缺陷并返回记录仪。光返回时间的微小差异将告诉我们地下电缆周围非常小的振动、温度变化和运动。由于电缆就是传感器，因此我们可以监测长达 15 公里的地下状况，并观察电缆沿线最接近 25 厘米的差异。这些测量每秒进行十万次，这意味着也可以测量非常快速的变化。这种称为分布式应变、温度和声学传感套件的新技术可用于许多不同的地方。它可以用来监测火山和地震，也可以用来跟踪交通和行人。对于第一个项目，我们将在诺福克北部海岸安装 DiSTANS 系统，那里的海水以每年 10 厘米的速度侵蚀海岸，威胁着人们的房屋和企业，并对使用海岸的人和野生动物构成危险。我们将监测山体滑坡前的小裂缝和塌陷，以及它们如何受到每天和季节温度变化的影响。