The coarse grain color sorter is a high-tech device based on optical principles and intelligent algorithms, which can quickly and accurately sort different qualities of grains. It separates high-quality grains from low-quality grains, impurities, etc. by identifying their color, shape, size, and other characteristics. The following is the working principle and key technology of the coarse grain color sorter to distinguish different qualities of grains.

1、 Working principle

optical imaging system

The core of the coarse grain color sorter is the optical imaging system, mainly composed of high-definition cameras, light sources, and sensors. When the grain enters the color selection area through the conveyor belt, the optical system will scan each grain at high speed to capture its surface color, texture, shape and other features. The light source usually uses LED lights to ensure uniform and stable light, avoiding the impact of lighting problems on recognition accuracy.

image processing techniques 

The images captured by the optical system will be transmitted to the image processing module. Through high-resolution cameras and advanced image processing algorithms, the color sorter can accurately analyze the color differences of each grain. For example, high-quality grains usually have uniform and full colors, while low-quality grains may have spots, mold, or discolored parts. Image processing technology can identify these subtle differences and mark them as objects that need to be removed.

Intelligent recognition and sorting

Based on the results of image processing, the color sorter classifies grains through intelligent algorithms. For example, by setting a preset color difference threshold, the machine can automatically identify and distinguish between high-quality and low-quality grains. At the same time, the color sorter can also identify impurities (such as stones, soil blocks, straw, etc.) and remove them. The sorting process is usually completed through high-speed airflow or mechanical devices to blow out or separate unqualified grains or impurities.

2、 Key technologies

high precision sensors

The color sorter uses high-precision sensors that can capture subtle color changes in grains. For example, for miscellaneous grains such as rice, wheat, and corn, sensors can identify whether there are mold, insect infestation, or discoloration issues on their surfaces. The sensitivity and resolution of the sensor directly determine the sorting accuracy of the color sorter.

multispectral imaging

Some high-end color sorting machines adopt multispectral imaging technology, which can simultaneously capture grain characteristics under visible and infrared light. For example, infrared imaging can identify the moisture content inside grains or whether there are insect infestations, thereby further improving sorting accuracy.

Deep learning algorithms

Modern color sorting machines are typically equipped with deep learning algorithms that can improve recognition accuracy through extensive data training. For example, by analyzing the image features of different quality grains, machines can automatically optimize sorting rules to meet the sorting needs of different types of miscellaneous grains.

High speed sorting system

The sorting speed of the color sorter directly affects production efficiency. Modern color sorting machines use high-speed airflow or mechanical devices to complete sorting actions in milliseconds, ensuring efficient production without reducing sorting accuracy.

3、 Distinguishing the specific applications of different quality grains

Color Sorting

Color is an important indicator for distinguishing the quality of grain. For example, high-quality rice usually has a uniform color and is crystal clear, while low-quality rice may have yellow grains, black spots, or moldy parts. The color sorter identifies these color differences and removes inferior rice.

Shape and size sorting

Grain of different qualities may have differences in shape and size. For example, high-quality wheat grains are plump and evenly sized, while low-quality wheat may be withered or broken. The color sorter classifies grains by analyzing their shape and size.

Impurity removal

Impurities such as stones, soil blocks, and straw may be mixed into the grain. The color sorter separates these impurities from grains by identifying their color, shape, and texture characteristics.

Mold and insect infestation detection

Mold and insect infestation are important factors affecting the quality of grain. The color sorting machine removes unqualified grains by identifying color changes or insect marks in moldy parts.

4、 Advantages and limitations

advantage

Efficiency: The color sorter can quickly sort a large amount of grain, improving production efficiency.

Accuracy: Through high-precision sensors and intelligent algorithms, the color sorter can accurately identify different qualities of grain.

Automation: The color sorter achieves fully automated operation, reducing labor costs.

Multifunctional: Suitable for sorting various miscellaneous grains such as rice, wheat, corn, beans, etc.

limitation

High cost: The purchase and maintenance costs of high-end color sorting machines are relatively high and may not be suitable for small businesses.

There are limitations on the types of grains: different types of miscellaneous grains may require different sorting parameters, with limited adaptability.

High requirements for lighting and environment: The accuracy of the color sorter is affected by lighting and environmental factors, and it needs to operate in a stable environment.

5、 Future Development Trends

Intelligent upgrade

With the development of artificial intelligence technology, future color sorting machines will become more intelligent, capable of automatically learning and optimizing sorting rules to adapt to a wider variety of miscellaneous grains.

Multi-functional integration

Future color sorting machines may integrate more functions, such as moisture detection and nutrient analysis, to provide a more comprehensive solution for grain processing.

Environmental Protection and Energy Conservation

The design and manufacturing of color sorting machines will pay more attention to environmental protection and energy conservation, reducing energy consumption and waste emissions.

The coarse grain color sorter can efficiently and accurately distinguish different qualities of grains through optical imaging, image processing, and intelligent algorithms. It not only improves the efficiency and quality of grain processing, but also reduces labor costs and resource waste. With the continuous advancement of technology, color sorting machines will play a more important role in the field of grain processing, providing strong support for food safety and agricultural modernization.