Dielectric constant measurement system and method based on multipath opening coaxial probe

Abstract

The invention discloses a dielectric constant measurement system and method based on a multipath opening coaxial probe. The system comprises a vector network analyzer, a radio frequency multipath selector switch, a reaction kettle, a multipath temperature recorder and the opening coaxial probe; the vector network analyzer, the change-over switch controller and the multipath temperature recorder are all connected with the upper computer; and the radio frequency multipath change-over switch is connected with the change-over switch controller. The vector network analyzer is connected with the movable end of the radio frequency multi-way change-over switch through a stable-phase cable, the fixed end of the radio frequency multi-way change-over switch is connected with the opening coaxial probethrough a stable-phase cable, and the terminal of the opening coaxial probe is inserted into the reaction kettle. The method comprises the following steps: (1) setting and initializing calibration; (2) performing acquisition of multipath data and calculation of compensation errors; and (3) performing correction a reflection coefficient and inversion of a dielectric constant. According to the method, the dielectric constants at different positions of the hydrate are accurately measured on the premise that sample components are not damaged, and the spatial distribution of the dielectric constants of the hydrate is accurately evaluated.

Description

technical field [0001] The invention belongs to the technical field of dielectric constant measurement, and in particular relates to a dielectric constant measurement system and a measurement method for hydrates based on a multi-channel open coaxial probe. Background technique [0002] Natural Gas Hydrate, also known as combustible ice, is an ice-like crystalline substance formed by small molecule natural gas such as methane and water under specific low temperature and high pressure conditions. It is widely distributed in seabed sediments and land permafrost. In the soil belt. Due to its wide global distribution, large energy reserves, high energy density and high resource value, natural gas hydrate has become the focus and hot spot of resource exploration and development since the 21st century. [0003] The dielectric constant is one of the important parameters to characterize the electrical properties of materials. With the deepening of hydrate exploration technology and ...

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