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Near-infrared multispectral sorting equipment

A near-infrared, multi-spectral technology, applied in the field of sorting, can solve the problems of low scanning line frequency, no high-speed near-infrared device that can realize large-volume online sorting, and difficult to achieve, and achieve the effect of improving the recognition rate.

Active Publication Date: 2018-02-16
ANHUI ZHONGKE OPTIC ELECTRONICS COLOR SORTER MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] CN103480586A "A dual-infrared online plastic material sorting device" adopts two front-splitting lenses and two sensors to obtain near-infrared plastic images of two bands respectively, synthesizes the corresponding pixels of the two images, and adopts a certain algorithm to effectively identify PVC impurities in PET plastics, but because only two bands of spectral technology is used, this method can only distinguish between individual types of plastics, such as PET and PVC described in the article, and most of the other plastics are not good. distinguish
SPECIM's hyperspectral camera adopts the PGP spectroscopic structure, and is mostly used for imaging of area array cameras. The imaging speed is mostly tens of frames per second, and the sorting speed is still limited.
The main representative of high-speed hyperspectral cameras is Brimose’s AOTF near-infrared camera, which has an optional wavelength range of 900-1700nm and 900-2500nm. The wavelength switching speed can be used to take images with line array or area array cameras, but the disadvantage is that the scanning line frequency of the existing near-infrared line array sensors is relatively low, which cannot fully match the device, so it is difficult to achieve online sorting
[0010] From the above analysis, it can be seen that near-infrared spectroscopy can be used to identify various polymer plastics, but currently there is no high-speed near-infrared device that can achieve large-scale online sorting to meet the needs of actual sorting

Method used

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Embodiment 1

[0044] figure 1 A schematic diagram of a near-infrared multispectral sorting device provided by this patent is shown. The near-infrared multi-spectral sorting equipment mainly includes light sources 51-52, light-collecting devices 41-42, a vibrator 1, a material chute 2, an optical signal receiving device 60, a background light source 53, a background plate 101, a spray valve device 90 and Image processing display device 80 . The vibrator 1 guides the material along the material chute 2 , irradiates the measured material 3 through the near-infrared light source 51 - 52 , and receives the light wave signal reflected by the measured material 3 through the optical signal receiving device 60 . The light sources 51-52 are near-infrared light sources. The light-gathering devices 41-42 adopt spotlight shades.

[0045] According to different structural requirements, different near-infrared light sources can be selected, such as figure 1 The light sources 51-53 used in the method c...

Embodiment 2

[0058] This patent application can also be according to the structural schematic diagram of another embodiment, such as image 3 A near-infrared multi-spectral sorting device with another structure is designed as shown. The difference between it and the above-mentioned first embodiment is that the direction of the optical signal receiving device 60 and the light sources 51-52 relative to the material is different, and the background light source 53 and the background plate 101 are on the same side as the light sources 51-52. In this embodiment, the light sources 51-52 After the near-infrared light emitted by 52 is irradiated on the material 3, it is reflected, absorbed, and transmitted by the material 3, and the transmitted light will be received by the optical signal receiving device 60, and the optical signal will be converted into multiples according to the method described in the first embodiment. Electrical signals in spectral bands.

Embodiment 3

[0060] This patent application can also be according to the structural schematic diagram of the third embodiment, such as Figure 4 A near-infrared multi-spectral sorting device with another structure is designed as shown. The difference from the first embodiment above is that light sources 51-54 and optical signal receiving devices 61, 62 are arranged on both sides of the material, and background light sources 55, 56 and background plates 101, 102 are arranged on both sides of the material. , in this embodiment, after the near-infrared rays emitted by the light sources 51-54 are irradiated on the material 3, they are reflected, absorbed, and transmitted by the material 3, and the rays transmitted by 51-52 and the rays reflected by 53-54 will be received by the optical signal Received by the device 62, the optical signal is converted into an electrical signal with multiple spectral bands according to the method described in the first embodiment. Similarly, the light transmitte...

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Abstract

Relating to the technical field of sorting equipment, the invention discloses near-infrared multispectral sorting equipment. The equipment includes a plurality of light sources; a material conveying mechanism; an optical signal receiving device located on both sides or one side of a material; and an image processing and displaying device for processing of signals received by the optical signal receiving device; wherein the light sources are symmetrically distributed on two sides of the optical signal receiving device. The near-infrared multispectral sorting equipment provided by the inventioncan acquire the near-infrared multispectral image of the material on line, utilize the near-infrared characteristic spectral information of multiple wave bands, and combine chemometrics method frequently used by near infrared spectrum analysis, can identify a variety of plastic materials simultaneously, and the multispectral combination also can improve the identification rate of plastic materialswith similar characteristics. The near-infrared multispectral sorting equipment provided by the invention can be widely applied in waste plastic recovery, food components, mildew and other sorting fields, and has important practical application significance.

Description

technical field [0001] The invention belongs to the technical field of sorting for food processing and recycling of industrial products, and in particular relates to a near-infrared multi-spectral sorting device. Background technique [0002] With the continuous increase in the consumption of plastic products, the generation of waste plastics is also increasing year by year. It is understood that in 2011, my country's waste plastic production reached 28 million tons, and in 2012 it was 34.13 million tons. If the processing and storage of these waste plastics are not handled properly, it will inevitably damage the environment and endanger health; on the other hand, as one of the derivatives of petroleum, plastic is a non-renewable resource, so the price is gradually rising, so the price of waste plastics Recycling is also valued by various countries. [0003] At present, the materials used in plastic products are widely distributed, such as PET, PVC, PS, ABS, PE, etc. When ...

Claims

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Application Information

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IPC IPC(8): G01N21/359G01N21/3563G01N21/01B07C5/342B29B17/02
CPCB07C5/342B29B17/02B29B2017/0203B29B2017/0279G01N21/01G01N21/3563G01N21/359G01N2201/061Y02W30/62
Inventor 方杰贾星明桂岳疏义桂熊杨寿蔡丽
Owner ANHUI ZHONGKE OPTIC ELECTRONICS COLOR SORTER MACHINERY
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