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Electromagnetic wave detection method for grain pile water content

A detection method and electromagnetic wave technology, applied in the direction of material capacitance, etc., can solve the problems of expensive and complex equipment, large number of sensors, contact pollution, etc., and achieve the effects of low measurement cost, high measurement accuracy and convenient operation.

Inactive Publication Date: 2010-12-15
HENAN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] The purpose of the present invention is to provide an electromagnetic wave detection method for the moisture content of grain piles, which is used to solve the problems in the prior art that the number of sensors is large, wiring is difficult, contact pollution is caused, and equipment is expensive and complicated when detecting the moisture content of grain piles.

Method used

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  • Electromagnetic wave detection method for grain pile water content
  • Electromagnetic wave detection method for grain pile water content
  • Electromagnetic wave detection method for grain pile water content

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specific Embodiment approach

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings. The specific implementation is as follows:

[0029] 1. Determine the number of divided structural layers and detection parameters according to the measured depth of the grain pile. The division of the number of structural layers depends on the two parameters of the time window and the number of sampling points per scan. Due to the depth measurement, the 200M antenna integrated with the transmitting antenna and the receiving antenna, or the 80M antenna separated from the transmitting antenna and the receiving antenna, are placed directly on the grain surface to reduce propagation attenuation and geometric attenuation. The measurement adopts the working mode of timing trigger, and records multiple single-channel echo signals in the vertical direction. For example, if the acquisition parameters of 40ns time window and 128 sampling points per scan are used, assum...

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Abstract

The invention relates to an electromagnetic wave detection method for grain pile water content. The method comprises the following steps of: firstly performing virtual layering on a grain pile; secondly, working out the dielectric constant space distribution by a layer-by-layer inversion algorithm and a well logging method; and finally obtaining grain pile water distribution according to a dielectric-water content model. The method of determining the grain pile water content by using electromagnetic wave to detect the grain pile dielectric constant avoids use of a large amount of sensors, is easy to detect the interior of the grain pile, and has the advantages of simple equipment and convenient operation. Because the well logging method is adopted, the measurement result is more accurate.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave detection, in particular to a large-scale real-time on-line detection method for stored grain moisture in a granary. Background technique [0002] Grain moisture content has an important influence on grain storage. If the moisture content is too high, the transport capacity and storage capacity will be wasted, and the food life activities will be vigorous, which will easily cause biochemical changes such as fever, mildew, and insect growth. The moisture content is too low, which destroys the organic matter of the grain and reduces the quality. For this reason, accurate detection of moisture content in grain is crucial. In recent years, grain moisture detection technology has been continuously developed and improved. [0003] The standard method for grain moisture detection is to calculate the absolute moisture content by directly removing moisture from the grain by drying or chemic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/22
Inventor 张元廉飞宇钱向明张德贤傅洪亮付麦霞
Owner HENAN UNIVERSITY OF TECHNOLOGY
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