Imaging device of color sorter

Abstract

The invention relates to the technical field of color sorting, and in particular, discloses a background device of a color sorter. The device comprises a dust removing module, an annular belt I, a camera 2, a background lamp 3 and a transmission shaft 4 respectively arranged on a frame 9; the annular belt 1 peripherally rotates around the transmission shaft 4 and a background support plate 8; the dust removing module and the annular belt 1 form relative movement; and the dust removing module comprises a cleaning brush 5, a water nozzle 6 and an air nozzle 7. A lens of the camera 2 is pointed to a belt surface of the annular belt 1; and the belt surface forms a signal acquiring background of the camera 2. The color of the annular belt is the background color needed by materials to be sorted; and the belt surface reinforces reflecting light through the background lamp. After the color sorter works by a period of time, some dust and sand grains can drop on the belt surface of the annular belt 1; in order to not influence signal acquisition of the camera 2, the annular belt 1 is driven by rotation of the transmission shaft 4 to peripherally rotate, and the lower part is sprayed by the water nozzle 6, cleaned by the cleaning brush 5 and dried by the air nozzle 7; and the cleaned and dried annular belt 1 is continuously fed in a working area for circulation, so that the working surface of the annular belt 1 pointed by the camera 2 is always kept clean.

Description

technical field [0001] The invention relates to the field of photoelectric equipment, in particular to an imaging device of a color sorter. Background technique [0002] The color sorter is a device that uses photoelectric technology to automatically sort out the different-color particles in the granular material according to the difference in the optical characteristics of the material. It is widely used in the sorting of agricultural products, medicines, ores and other materials. [0003] The working principle of the color sorter is that the selected materials enter the sorting chamber through the feeding device and pass between the camera and the background plate; When the signal difference deviates from the predetermined value, the control system will drive the air injection device to remove the heterochromatic particles, so as to achieve the purpose of sorting. [0004] The main role of the background plate in this process is to provide a reference amount of light. ...

AI Technical Summary

Problems solved by technology

[0006] The defects in the above-mentioned prior art are: 1. The optical glass requires a dust removal device for regular dust removal

However, the dust removal brush generally rubs back and forth on the optical glass during the dust removal process, which naturally makes it difficult for the camera in the color sorter to accurately collect the color signal of the material. Therefore, the camera generally needs to stop image acquisition when the dust removal brush is removing dust. Reduced work efficiency of the color sorter

2. After the dust removal brush is rubbed many times in a dusty environment, the optical glass will be scratched and affect the collection of camera images, thereby reducing the color sorting effect

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