Laser photoelectric rapid detection device and method for polluted grains and infected grains

A detection device and laser light source technology, applied in the fields of grain storage, production and transportation, can solve the problems of detection accuracy and interference, and achieve the effect of good detection accuracy and high efficiency

Pending Publication Date: 2022-04-15
HENAN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the way of reflecting light has high requirements on the accuracy of light emission and detection. The reflected light from surrounding objects and the environment is likely to cause interference in the detection process, and the shape of each seed is different. The reflected light Different destinations will also lead to detection accuracy problems in the detection process
[0010] In short, the existing technical solutions using the principle of visible light reflection, near-infrared light and X-rays all have problems of varying degrees.

Method used

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  • Laser photoelectric rapid detection device and method for polluted grains and infected grains
  • Laser photoelectric rapid detection device and method for polluted grains and infected grains
  • Laser photoelectric rapid detection device and method for polluted grains and infected grains

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Effect test

Embodiment 1

[0043] Such as figure 1 As shown, a laser photoelectric rapid detection device for food pollution and diseased grains includes a laser light source 1, a food detection position 6, a photodetector 4 and a processor module 7;

[0044] The laser light source 1 and the photodetector 4 are oppositely arranged on both sides of the grain detection position 6, and the light emitted by the laser light source 1 passes through the grain detection position 6 and is irradiated on the receiving end of the photodetector 4. The detector 4 is connected to the processor module 7 . The projected area of ​​the peripheral boundary of the space to be measured of the food detection position 6 in the direction of light irradiation covers the boundary of the receiving end of the photodetector 4 .

[0045] In a preferred embodiment, the light emitted by the laser light source 1 is a parallel laser beam 2, which can ensure the stability and uniformity of the output light.

[0046] The detection method...

Embodiment 2

[0053] The main difference between this embodiment and embodiment 1 is:

[0054] The laser wavelength emitted by the laser light source is 550-750nm.

[0055] Such as Figure 4 As shown, this figure illustrates the discrimination of the transmitted light intensity between normal corn grains and diseased corn grains under different wavelength light sources. The light source wavelength range is between 550nm and 980nm, and the difference rate is obvious.

[0056] The difference rate is calculated as (transmitted light intensity of normal grains-transmitted light intensity of diseased grains) / transmitted light intensity of diseased grains.

[0057] Such as Figure 5 As shown, this figure illustrates the discrimination of the transmitted light intensity of normal wheat grains and diseased grains under different wavelength light sources. The light source wavelength range is between 520nm and 800nm, and the difference rate is obvious.

[0058] Such as Image 6 with Figure 7 As...

Embodiment 3

[0061] Such as Figure 8 As shown, the grain detection position is an inclined grain flow channel 5, under which the grain flow channel 5 is provided with a slit or slot for installing the photodetector 4, and the laser light source 1 is installed in the grain flow channel 5 above.

[0062] The main purpose of this embodiment is to detect the grain flow one by one in the case of mass detection, so as to improve the detection efficiency.

[0063] Preferably, the emission direction of the laser light source is perpendicular to the grain flow channel, and the receiving direction of the photodetector is perpendicular to the grain flow channel, so as to ensure the stability of light emission and reception.

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Abstract

The invention provides a laser photoelectric rapid detection device for grain pollution and infected grains. The laser photoelectric rapid detection device comprises a laser light source, a grain detection position, a photoelectric detector and a processor module, the laser light source and the photoelectric detector are arranged on the two sides of the grain detection position in a right-facing mode, light emitted by the laser light source penetrates through the grain detection position and irradiates the receiving end of the photoelectric detector, and the photoelectric detector is connected with the processor module. The laser photoelectric rapid detection device and the laser photoelectric rapid detection method for the polluted grains and the infected grains have the advantages of laser transmission, strong anti-interference capability, large wave band absorbance and high detection accuracy.

Description

technical field [0001] The invention relates to the field of storage, production and transportation of grain, in particular to a laser photoelectric fast detection device and method for grain pollution and diseased grains. Background technique [0002] In the process of production, storage and transportation, food will inevitably be polluted, such as: fungus, mildew, oil, etc. If people eat these contaminated food, it will affect people's health slightly or severely, so it is necessary to Sorting out the contaminated grain particles before eating to ensure food safety. [0003] The current research on grain and other agricultural product detection technology mainly focuses on three directions: biochemical detection method, machine vision detection method and photoelectric detection method. [0004] Biochemical detection methods have high sensitivity and high accuracy, but the required conditions are relatively strict, the operation is relatively complicated, and the detecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01N21/31
Inventor 胡继云卞科李萌萌王星郭广东关俊豪
Owner HENAN UNIVERSITY OF TECHNOLOGY
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