What is a color sorter

1. The concept of color sorter

The color sorter is a device that uses the photoelectric principle to detect and separate individuals (spherical, massive or granular) with abnormal colors or infected with pests and diseases and foreign impurities from a large number of bulk products. At present, the domestic color sorter is mainly used in the rice milling and finishing industry, and it has been widely used in the processing industries that require color sorting of solid particle materials, such as food, agricultural products, chemical equipment, and mineral processing industries.

When the unqualified product and the qualified product cannot be separated by the screening equipment because of the close particle size, or the density is basically the same and cannot be separated by the specific gravity separation equipment, the color sorter can separate well, and its unique effect is quite obvious. At present, the detection methods used on color sorters are photoelectric and image.

2. Technical principle of color sorter

The materials that will be selected for color, such as heterochromatic grains in rice, are calibrated on the equipment according to the degree of human need. The feeding system controlled by vibration, evenly at a certain speed, passes through the chute, and enters the color selection area. The high-speed optical camera (or color camera) converts the high-speed flowing product into a 256-level gray-scale black-and-white photo or color. The picture, and the defective product will show a different grayscale difference from the normal product in the picture, and then use the full digital analysis device and advanced pattern recognition technology to judge, drive the ejector through the driver, and eject the high speed, short, and fine The beam airflow eliminates heterochromatic particles, thereby improving the quality of the material.

3. System composition of color sorter

The color sorter is mainly composed of four parts: a feeding system, a detection system, a signal processing and control circuit, and a rejection system.

The detection system is mainly composed of a light source, optical components, colorimetric plates, photoelectric detectors, dust removal cooling components and housings. The function of the detection system is to detect the optical properties (reflection, absorption, projection, etc.) of the material to obtain the correct quality information of the inspected product necessary for subsequent signal processing. The light source can be infrared light, visible light or ultraviolet light, and the power must be kept constant.

The light used by the color sorter can use one wavelength or two wavelengths. The former is a single color type, which can only distinguish the intensity of light and dark, while the latter is a two-color type, which can distinguish the true color difference. There is dust flying or accumulation in the detection area, which affects the detection effect. A combination of low-pressure continuous air curtain or regular high-pressure spray can be used to keep the air in the detection area clean and the environment clean, and to cool the heat generated by the light source. At the same time, an automatic broom is also set to clean at any time to prevent dust accumulation.

4. Purpose of color sorter

The color sorter can be used in agricultural food, oilseeds, chemical, pharmaceutical and other industries, and is more suitable for rice, tea, sesame, beans, melon seeds, raisins, small yellow rice, Joe wheat, glass, plastic, cinder, ore, peanut, Color selection of cottonseed, wolfberry, prickly ash, etc.

5. The meaning of color sorter

Compared with manual selection: labor saving, time saving, high efficiency and low processing cost. Improve the quality and economic and social benefits of selected products.