Optical fiber sensor and method for synchronously measuring heat conductivity coefficient and specific heat capacity of rock-soil body

Abstract

The invention discloses an optical fiber sensor and a method for synchronously measuring a heat conductivity coefficient and a specific heat capacity of a rock-soil body. The synchronous measurement optical fiber sensor comprises an internal heating temperature measurement optical cable and one or more temperature measurement optical cables, the internal heating temperature measurement optical cable is provided with a near end capable of being connected with a power supply and an optical signal demodulation device, the temperature measurement optical cable is provided with the near end capable of being connected with the optical signal demodulation device, and the internal heating temperature measurement optical cable comprises a heating layer and a temperature measurement optical fiber. The internal heating temperature measuring optical cable and the temperature measuring optical cables are connected through a base band, or the temperature measuring optical cables are connected through the base band. The synchronous measurement optical fiber sensor has a spreading state, and in the spreading state, the internal heating temperature measurement optical cable and the temperature measurement optical cables respectively extend along a first direction, and the internal heating temperature measurement optical cable and the temperature measurement optical cables are arranged at intervals in a second direction perpendicular to the first direction. The optical fiber sensor can synchronously measure the heat conductivity coefficient and the specific heat capacity of the rock-soil body, and is accurate in result and convenient to operate.

Description

Technical field [0001] The present invention belongs to the field of generic measuring technology, and it is related to a synchronous measuring optical fiber sensor and method for generic thermal conductivity and specific heat capacity. Background technique [0002] The thermal conductivity of the generous body and the specific heat capacity reflect the main parameters of the nature of its heat, and determines the slow delivery. In direct utilization, it is the quantization indicator of various scales under the temperature field. The application is mainly including shallow land temperature development, underground engineering refrigeration construction, freezing region foundation processing, and nuclear waste disposal; in indirect utilization, Equivalent evaluation of soil water content, dry density, seepage speed and other parameters, establish an expression of the soil-related properties through the thermal conductivity and the specific heat capacity, respectively, help to redu...

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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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