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Aflatoxin detecting and sorting apparatus

A kind of aflatoxin and sorting device technology, applied in the direction of material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of weak fluorescence signal and low recognition rate of online sorting, and achieve improved online recognition rate, high signal-to-noise ratio, The effect of high optical power

Active Publication Date: 2013-08-07
HEFEI MEIYA OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a kind of aflatoxin detection and sorting device that overcomes the disadvantages of low recognition rate of existing Aspergillus flavus equipment and weak fluorescent signal of online sorting

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no. 1 example

[0032] figure 1 A schematic diagram of the first embodiment of the aflatoxin online detection device provided by the present invention is shown. The aflatoxin detection and sorting device includes ultraviolet light sources 41-44, a material slideway 1, light collecting devices 51-52, imaging lenses 71-72, beam splitting prisms 91-92, and image sensors 81-86.

[0033] According to different structural requirements, different ultraviolet light sources can be selected. For example in figure 1 The ultraviolet light sources 41-44 used in the above are fluorescent tubes with a center wavelength of 365nm, and the wavelength band does not exceed 400nm. The ultraviolet light sources 41-44 are symmetrically distributed on both sides of the end of the material slideway 1 with the falling track of the material 2 as a symmetrical axis.

[0034] The above-mentioned ultraviolet light sources 41-44 may also be ultraviolet LEDs or ultraviolet lasers.

[0035] The light concentrating device...

no. 2 example

[0043] This patent application can also be according to the structural schematic diagram of another embodiment, as Figure 4 Another structure of aflatoxin detection and sorting device was designed. The difference between it and the above-mentioned first embodiment lies in the difference in the signal receiving mode. The front and rear sides of the material 2 respectively adopt an imaging lens and a three-line array TDI CCD image sensor to form a signal receiving device.

[0044] The ultraviolet light focused on the surface of the material excites the fluorescence of the material 2, and the fluorescence of the material 2 is received by the image sensors 121 and 122 after passing through the imaging lenses 71-72 located on the front and rear sides of the material 2, and the image sensors 121 and 122 are three-line array TDI CCD image sensor, the image sensor 121, 122 acquires the RGB value of an image in time division, and the final composite image reflects the fluorescent colo...

no. 3 example

[0047] Such as Figure 6 As shown, this patent application can also design another structure of aflatoxin detection and sorting device according to the structural principle of the third embodiment. The difference between it and the above-mentioned first embodiment lies in the difference in the way of signal reception, and the front and rear sides of the material 2 are respectively implemented by three imaging lenses and three image sensors. The three image sensors use a single-line array TDI CCD image sensor, and a filter is added between each imaging lens and the image sensor, and the three filters are band-pass filters with different center wavelengths.

[0048] For example, you can use Figure 6 In the manner shown, the fluorescent signals generated by material 2 such as peanuts are respectively received by the three imaging lenses 71-73 on the front side and the three imaging lenses 74-76 on the rear side, and the signals received by the three imaging lenses 71-73 on the ...

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Abstract

The invention provides an aflatoxin detecting and sorting apparatus. The apparatus comprises a plurality of ultraviolet light sources, a material slide rail, and optical signal receiving devices positioned at the front and back sides of a material to be detected respectively, the ultraviolet light sources are symmetrically distributed at two sides of the tail end of the material slide rail through treating a material falling locus as an symmetric axis, the ultraviolet light sources irradiate the surface of the material and excite the fluorescence of the material, and the optical signal receiving devices collect the R, G and B fluorescence signals of the same material in a same position, convert the R, G and B fluorescence signals to electric signals, and combine the three-way electric signals to form a color image. The apparatus has the advantages of online obtaining the weak color fluorescence signal of the material, convenience for the effective distinguishing of the aflatoxin material, and improvement of the online recognition rate of aflatoxin polluted materials.

Description

technical field [0001] The technical proposal of the patent application belongs to the technical field of food processing, in particular to a device for detecting aflatoxins in mildewed materials. Background technique [0002] Aflatxoni (AF) is a highly toxic and strong carcinogenic molecular mycotoxin, and it is the most stable chemical structure among various mycotoxins discovered so far. In 1993, aflatoxin was classified as one of the strongest known carcinogenic chemicals by the Cancer Research Institute of the World Health Organization. Its toxicity is 10 times greater than potassium cyanide and 68 times greater than arsenic. Studies have shown that aflatoxins are most likely to contaminate peanuts, corn, cottonseed, poultry eggs, meat, milk and dairy products. Therefore, detecting and removing Aspergillus flavus from contaminated food can greatly reduce the harm of aflatoxin to human body, which has important practical significance. [0003] Currently commonly used a...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 方杰戚丽何吉柱胡修稳常宏刘宝莹
Owner HEFEI MEIYA OPTOELECTRONICS TECH
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