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Optical fiber sensor and method for simultaneous measurement of thermal conductivity and specific heat capacity of rock and soil

A fiber optic sensor, synchronous measurement technology, applied in the direction of thermal conductivity of materials, measuring heat, measuring devices, etc.

Active Publication Date: 2022-07-26
NANJING UNIV
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  • Application Information

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Problems solved by technology

[0005] To sum up, there is currently no technology or product about the device and method for in-situ distributed simultaneous measurement of thermal conductivity and specific heat capacity

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  • Optical fiber sensor and method for simultaneous measurement of thermal conductivity and specific heat capacity of rock and soil
  • Optical fiber sensor and method for simultaneous measurement of thermal conductivity and specific heat capacity of rock and soil
  • Optical fiber sensor and method for simultaneous measurement of thermal conductivity and specific heat capacity of rock and soil

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Embodiment Construction

[0044] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted here that the descriptions of these embodiments are used to help the understanding of the present invention, but do not constitute a limitation of the present invention.

[0045] This embodiment provides an optical fiber sensor for simultaneous measurement of thermal conductivity and specific heat capacity of a rock and soil body, which is used for synchronously measuring the thermal conductivity and specific heat capacity of a rock and soil body. refer to figure 1 and figure 2 As shown, the synchronous measurement optical fiber sensor includes an internal heating temperature measuring optical cable 100 and one or more temperature measuring optical cables; the internal heating temperature measuring optic...

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Abstract

The invention discloses an optical fiber sensor and method for synchronously measuring thermal conductivity and specific heat capacity of rock and soil bodies. The synchronous measurement optical fiber sensor includes an internal heating temperature measurement optical cable and one or more temperature measurement optical cables. The internal heating temperature measurement optical cable has a proximal end that can be connected to a power supply and an optical signal demodulation device. The proximal end of the signal demodulation device, the inner heating temperature measurement optical cable includes a heating layer and a temperature measurement optical fiber, and the inner heating temperature measurement optical cable and the temperature measurement optical cable or between the temperature measurement optical cables are connected by a baseband; The synchronous measurement optical fiber sensor has a spread state. In the spread state, the inner heating temperature measurement optical cable and the temperature measurement optical cable extend in the first direction respectively, and the inner heating temperature measurement optical cable and the temperature measurement optical cable are in the first direction. They are arranged at intervals in a second direction perpendicular to the first direction. The invention can simultaneously measure the thermal conductivity and the specific heat capacity of the rock and soil body, and the result is accurate and the operation is convenient.

Description

technical field [0001] The invention belongs to the technical field of rock and soil mass measurement, and relates to an optical fiber sensor and method for synchronously measuring thermal conductivity and specific heat capacity of rock and soil mass. Background technique [0002] The thermal conductivity and specific heat capacity of rock and soil are the main parameters reflecting its thermal properties, which determine the speed of heat transfer. In terms of direct utilization, it is a quantitative index of the temperature field of rock and soil at various scales. The application fields mainly include shallow geothermal energy development, underground engineering freezing construction, foundation treatment in freeze-thaw areas, and nuclear waste disposal; in indirect utilization, it can be Indirectly evaluating parameters such as soil moisture content, dry density, and seepage velocity, and establishing expressions related to soil properties through thermal conductivity a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/20G01N25/18G01K11/32
CPCG01N25/20G01N25/18G01K11/32
Inventor 顾凯张博魏壮姜霖董家君戚海博向伏林施斌
Owner NANJING UNIV
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