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A double-entry resonant cavity online measuring device for measuring grain moisture content

A measuring device, a technology for moisture content, applied in resonators, using microwaves to test moisture content, electrical components, etc., can solve the problems of equivalent model defects, small number of samples, etc., achieve uniform field distribution, improve practicability, and facilitate filling Effect

Active Publication Date: 2021-06-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

The resonant cavity of this method only detects the moisture content of a single grain, and the number of samples detected at one time is too small, and the equivalent model for estimating the moisture content of the entire grain has obvious defects

Method used

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  • A double-entry resonant cavity online measuring device for measuring grain moisture content
  • A double-entry resonant cavity online measuring device for measuring grain moisture content
  • A double-entry resonant cavity online measuring device for measuring grain moisture content

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Embodiment Construction

[0032] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail in conjunction with specific embodiments.

[0033] The measurement device is composed of two reentrant resonant cavities on the left and right, which are mutually coupled and docked. The two resonant cavities are respectively the sample cavity and the test cavity, and the shell is made of copper metal. A cylindrical sample barrel made of polytetrafluoroethylene material is placed in the center of the sample cavity; a pair of coupling structures are arranged symmetrically outside the test cavity on the right, and the coupling structure is inserted into the test cavity through a probe to realize the resonance between the resonant cavity and the test cavity. Coupling between measuring instruments; left and right reentrant resonant cavities are interconnected through electric field coupling between interconnected hol...

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Abstract

The invention discloses a dual-entry resonant cavity online measuring device for measuring the moisture content of grain, belonging to the technical field of microwave applications. The test device includes two mutually coupled reentrant sample chambers and a test chamber, wherein a sample bucket is arranged in the center of the sample chamber, and two coupling structures are symmetrically arranged outside the test chamber, and the coupling structures are inserted into the test chamber through a probe. In the cavity, the coupling between the test cavity and the measuring instrument is realized. The measuring device can not only improve the testing efficiency and testing precision, but also can eliminate the influence of the bulk density of the sample on the testing result, thereby improving the practicability of the measuring device.

Description

technical field [0001] The invention belongs to the field of microwave application technology, and in particular relates to a high-precision grain moisture content detection device based on complex dielectric constant testing, which is composed of a high-Q value double-entry resonant cavity. Background technique [0002] Grain moisture content is one of the important indicators of grain quality evaluation, and its detection is of great significance to grain storage, purchase, transportation, processing and other links. Excessive moisture content of grain can easily lead to germination and mildew of grain, which is not conducive to its storage and transportation. The low moisture content of grain will affect its nutritional value and reduce the germination rate of seeds. Therefore, the detection of high-precision grain moisture content plays a vital role in improving grain quality and economic benefits. [0003] The detection of grain moisture content usually adopts the ove...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N22/04H01P7/06
CPCG01N22/04H01P7/06
Inventor 胡标孙振海汪海洋周翼鸿李天明李浩
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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