A U-tube real-time temperature and pressure monitoring and in-situ sampling system based on optical fiber sensing
A technology of optical fiber sensing and sampling system, which is applied in fluid pressure measurement, sampling devices, and thermometers with physical/chemical changes using optical methods. It can solve the difficulty of multi-layer sampling and cannot meet the real-time monitoring of groundwater temperature, pressure and water level. Changes and other issues to achieve the effect of overcoming uncertainty, good application prospects and commercial value, and convenient installation
Active Publication Date: 2021-10-29
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology
[0005] Based on the deficiencies of the existing technology, the technical problem to be solved by the present invention is to provide a real-time temperature and pressure monitoring and in-situ sampling system for U-shaped tubes based on optical fiber sensing, so as to solve the problem of multi-layer sampling in existing U-shaped tubes. Difficult, and cannot meet the problem of insufficient real-time monitoring of groundwater temperature, pressure and water level changes in the whole process
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[0072] see below Figure 1 to Figure 4 The fiber optic sensing-based U-tube real-time temperature and pressure monitoring and in-situ sampling system of the present invention will be described in detail.
[0073] The U-tube real-time temperature and pressure monitoring and in-situ sampling system based on optical fiber sensing provided by the present invention mainly includes two modules: in-situ sampling device and matching real-time online temperature and pressure monitoring device, wherein the in-situ sampling The device includes: a U-shaped tube, a driver, a sampling chamber, an intermediate flow storage container, an in-situ liquid heat preservation and pressure holding container, a liquid phase one-way valve, and a filter. The U-shaped tube is divided into multi-layer sampling chambers through a simple spiral divider, and each independently spaced sampling chamber is provided with a lateral sampling hole, which is filled with quartz sand, and the two ends of the sampling...
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Abstract
The invention discloses a U-shaped tube real-time temperature and pressure monitoring and in-situ sampling system based on optical fiber sensing. Pressure vessel, liquid phase one-way valve, filter; its real-time online temperature and pressure monitoring device includes in-situ water storage cavity, optical fiber fixing rod installed in the storage in-situ water storage cavity, optical fiber Bragg fixed on the optical fiber fixing rod Grating pressure sensor and temperature sensor, optical fiber traction screw, optical fiber clamp, optical fiber protection pad, signal transmission optical cable, demodulator connected with signal transmission optical cable, and host computer. The invention can realize in-situ sampling and real-time on-line monitoring of relevant parameters such as fluid pressure, temperature and water level in formations of different depths. The invention is suitable for various harsh acid-base environments, easy to install, complete in function, good in durability and stable in system , It can monitor the temperature and pressure online in real time for a long time, and achieve the sampling effect as needed.
Description
technical field [0001] The invention relates to the technical field of groundwater environment assessment and water resource circulation in energy and waste disposal, in particular to a U-shaped tube real-time temperature and pressure monitoring and in-situ sampling system based on optical fiber sensing. Background technique [0002] With the vigorous development of projects such as carbon dioxide geological storage and utilization, urban waste landfill and treatment, real-time monitoring and timely sampling of underground fluids are of great significance to safe construction and environmental safety assessment of projects. In addition, in nuclear waste disposal, oil extraction, underground fluid resource occurrence and evolution assessment, groundwater pollution assessment, pollution source tracking and microbial community analysis in dams, factories, oil production areas and other engineering areas, regional engineering or quality assurance in agriculture, forestry, geologi...
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IPC IPC(8): G01N1/16G01K11/3206G01L11/02
CPCG01K11/3206G01L11/025G01N1/16
Inventor 李琦谭永胜徐丽风李霞颖李小春
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI