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Complex dielectric constant measuring device and method based on wireless energy transmission principle

A technology for wireless energy transmission and complex permittivity, which is used in measurement devices, measurement of electrical variables, signal transmission systems, etc. It can solve the problems of not considering impedance matching and unable to achieve impedance matching, and achieve great flexibility and practicability. Realize the effect of impedance matching and easy installation

Inactive Publication Date: 2014-03-26
ZHEJIANG UNIV
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Problems solved by technology

[0004] Many complex dielectric constant measurement devices require the use of vector network analyzers, but many of them do not consider impedance matching, or cannot achieve ideal impedance matching

Method used

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  • Complex dielectric constant measuring device and method based on wireless energy transmission principle
  • Complex dielectric constant measuring device and method based on wireless energy transmission principle
  • Complex dielectric constant measuring device and method based on wireless energy transmission principle

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 , figure 2 As shown, the present invention includes a vector network analyzer 1, a source coil 2 and a load coil 3; the source coil 2 is connected to a vector network analyzer (available in the market) 1, and the source coil 2 and the load coil 3 are wirelessly connected through electromagnetic coupling resonance , the sample 4 to be tested is placed behind the load coil 3 .

[0025] The source coil 2 is a single-turn coil with a diameter of 35mm, and the SMA (Sub-Miniature-A) head on the single-turn coil is connected to the vector network analyzer 1; the load coil 3 is a 1-turn or multi-turn coil, figure 2 The middle is an 8-turn coil with a diameter of 60mm.

[0026] The relative position between the source coil 2 and the load coil 3 should be adjusted to the impedance matching requirement of 50 ohms.

[0027] The measure...

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Abstract

The invention discloses a complex dielectric constant measuring device and method based on the wireless energy transmission principle. The complex dielectric constant measuring device comprises a vector network analyzer, a source coil and a load coil, wherein the source coil is connected with the vector network analyzer, the source coil and the load coil are connected in a wireless mode through electromagnetic coupling resonance, and a measured sample is placed at back of the load coil. According to the complex dielectric constant measuring device and method, non-contact measurement on the complex dielectric constant of a small-size object is achieved; 50-ohm impedance matching and the high measurement sensitivity are simultaneously achieved through the large-Q-value magnetic resonance coupling coils; a linear computational formula for measuring the small-size measured sample is obtained through the Rayleigh scattering principle. The complex dielectric constant measuring device is easy and convenient to use and suitable for non-contact measurement on solid and liquid, and has the high flexibility and the high practicability.

Description

technical field [0001] The invention relates to a non-contact measuring device and a measuring method of a complex permittivity, in particular to a measuring device and a measuring method of a complex permittivity based on the principle of wireless energy transmission. Background technique [0002] Many traditional complex permittivity measurement devices need to be in contact with the sample to be measured, and have strict requirements on the measurement conditions. The measurement devices and methods are generally very complicated, and do not have the simplicity and flexibility of operation. [0003] Previous high-efficiency coupled magnetic resonance was mainly used for wireless energy transfer, but did not involve the measurement of complex permittivity. [0004] Many complex permittivity measurement devices require the use of vector network analyzers, but many of them do not consider impedance matching, or cannot achieve ideal impedance matching. Contents of the inven...

Claims

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Application Information

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IPC IPC(8): G01R27/26G08C17/02
Inventor 申发中董晶皇甫江涛冉立新
Owner ZHEJIANG UNIV
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