Method for detecting insect pests in stored grains by means of terahertz imaging technology

A technology of terahertz imaging and technical detection, which is applied in the field of terahertz time-domain spectral analysis to achieve the effects of high detection accuracy, avoiding economic losses, and easy operation

Inactive Publication Date: 2015-10-21
HENAN UNIVERSITY OF TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In the prior art, there is no report on the use of terahertz i...

Method used

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  • Method for detecting insect pests in stored grains by means of terahertz imaging technology
  • Method for detecting insect pests in stored grains by means of terahertz imaging technology

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Embodiment 1

[0020] 1) Turn on the air conditioner to keep the temperature of the measurement environment at around 20°C to 25°C, turn on the laser, controller, and terahertz time-domain spectroscopy system (THz-TDS) in sequence, and preheat the system for 30 minutes;

[0021] 2) Add a pair of parabolic mirrors for focusing the terahertz wave on the sample placement area of ​​the terahertz time-domain spectroscopy system (THz-TDS), and install a translation platform for moving the sample in the middle of the parabolic mirrors;

[0022] 3) A number of wheat grains were taken out from three different storage warehouses A, B, and C, and 10 grains were randomly selected from each warehouse as the samples to be tested, and they were divided into three groups A, B, and C. 10 wheat grains (including complete grains and incomplete grains) damaged by insects are used as standard samples to be grouped into group D, the aforementioned standard samples and samples to be tested are respectively fixed on...

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Abstract

The invention discloses a method for detecting insect pests in stored grains by means of the terahertz imaging technology. The method comprises the steps that 1, stored grains not damaged by insect pest eggs or larvae are collected as standard grains, and terahertz spectral imaging detection is carried out on the standard grains; 2, stored grain samples to be detected are collected, and terahertz spectral imaging detection is carried out on the stored grain samples; 3, stored standard grain terahertz images obtained in the step 1 and to-be-detected stored grain sample terahertz images obtained in the step 2 are compared and analyzed, and whether the stored grain samples to be detected have insect pest eggs or larvae or not is determined through analysis. The method has the advantages of being easy, convenient and rapid to implement, efficient, high in detection accuracy and the like, can rapidly and accurately detect insect pest eggs or larvae in the stored grains in the early insect pest period, has the important practical significance in ensuring stored grain safety and quality and reducing economic losses, and has good market application prospects.

Description

technical field [0001] The invention relates to the field of terahertz time-domain spectral analysis, in particular to a method for detecting intragranular pests in stored grains using terahertz imaging technology. Background technique: [0002] Grains, also known as grains, refer to edible plant seeds. In a broad sense, grains also include edible roots or stems of plants such as potatoes, while in a narrow sense, grains only refer to gramineous plants. The nutrients contained in food are mainly carbohydrates (mainly starch), followed by protein. The Food and Agriculture Organization of the United Nations defines three kinds of grains, including wheat, coarse grains (also known as miscellaneous grains, that is, plants that are often used as animal feed) and rice. [0003] In my country, grain reserves mainly include wheat (such as wheat, barley, etc.), coarse grains (such as corn, sorghum, etc.) and rice (japonica rice, indica rice, glutinous rice, etc.). and other oil-bear...

Claims

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Application Information

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IPC IPC(8): G01N21/3586
Inventor 廉飞宇葛宏义蒋玉英付麦霞李智
Owner HENAN UNIVERSITY OF TECHNOLOGY
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