As a large agricultural country that needs to provide high-quality and safe food for one- fifth of the world's population, the grain processing industry plays a vital role in the process of agricultural industrialization in China, and the localization and continuous autonomy of high-efficiency grain machine production. Innovation is the material basis for the food processing industry itself to move forward. This paper only summarizes the development history and future trends of China's color sorter industry, and understands the industrialization process of independent innovation in China's grain machine industry from one aspect. Â In order to meet the above development goals, the color sorter industry will gradually achieve the following major technological breakthroughs on the basis of independent innovation: 1 application of new light source; 2 spray valve with better dynamic performance to increase production, reduce take-out ratio, and adapt More color selection of food products; 3 new CCD integrated application to further improve the selection rate of finished products, to meet the color selection needs of more miscellaneous grains; 4 high-speed ultra-large-scale microprocessor application to embed more recognition algorithms to improve the system Practicality; 5 applications of mixed light sources. Although the color sorting machine was born abroad, due to the courageous exploration and independent innovation of our national enterprises, it broke the monopoly of foreign markets and accelerated the industrialization process of China's grain processing industry. At present, the color sorter industry has become an increasingly mature industry in China. With the continuous benign competition of color sorter manufacturers, China's color sorter technology is constantly improving, and will be flying with the world's peers. Social benefits: ( 1 ) Remove the heterochromatic grains mixed into the miscellaneous food products, improve the quality of the miscellaneous grains, and protect the health of the people. ( 2 ) Most of the miscellaneous grains are exported by raw grain, increase the added value of miscellaneous grains, promote the development of miscellaneous grains industry, increase the export volume of miscellaneous grains in China, and at the same time help China's agricultural institutions adjust and increase farmers' income. ( 3 ) Actively innovate China's multi-grain deep processing technology, develop high-tech equipment for deep processing of miscellaneous grains, develop high-tech opto-mechatronics products with independent intellectual property rights and national brands, form a high-tech industry of opto-mechatronics, and promote the simultaneous development of related industries; ( 4 ) Reduce imports, save foreign exchange, and actively export foreign exchange. At present, China's miscellaneous grain color sorting machines mainly rely on foreign imports, each of which is about 600,000 yuan. As the R&D and production level of China's miscellaneous grain color sorting machines continue to increase, the price will drop accordingly, thus reducing and saving a large amount of foreign exchange to the country every year. In addition, more importantly, we Chinese have mastered this technology, which is convenient for the majority of users, so that more grain processing enterprises can afford color sorting machines. At the same time, the company will increase the development of the international market and earn more foreign exchange for the country.
    1. Introduction to the development of China's color sorter industry
    CCD color sorter is a kind of secondary sorting function Light machine Electricity High-tech products with high-speed and high-sensitivity 2048Pixel linear array CCD as material color and shape sensor, FPGA+DSP data processing architecture, optimized software and hardware architecture with automatic calibration optical design and efficient image processing algorithms. It is superior to the photoelectric color sorter in many aspects such as minimum resolution, color selection accuracy, throughput and machine versatility. It is mainly used for the sorting of yellow, mildew, and impurities of rice, peanuts , melon seeds, sesame seeds, etc. It is an important equipment to ensure food safety and quality. The equipment was first commercialized by developed countries, but due to technological monopoly, its producers have been limited to a few developed countries such as the United Kingdom, the United States, and Japan.
    With the liberalization of national food policy after the 1980s reform and opening up, China's grain supply transformation from a planned economy to market-oriented mode of purchase and sale of free trade, product quality is an important determinant of food distribution process, a strong part of the strength The grain processing enterprises took the lead in using color sorters to improve their competitiveness. However, due to the relatively backward domestic technology, the color sorter products mainly depended on imports. Its high price, incomplete after-sales service and technical support seriously hindered the promotion and application of color sorting machines by China's grain production enterprises.
    The huge gap between demand and supply provides an opportunity for the development of China's color sorter industry. Some domestic grain machine companies are targeting this market and are beginning to enter the field of color sorter manufacturing. In the 1990s , Hefei Taihe Optoelectronics Technology Co., Ltd. took the lead in entering this field. After many years of painstaking research and hard work, domestic color sorting machine enterprises have gradually mastered the core technology of production color sorting machine, broke the technological monopoly of foreign color sorting machine industry, and gradually dominated the domestic color sorting machine market.
    At the same time as the domestic color sorter enterprises continue to grow, the sustained and rapid development of the Chinese economy has led to an increase in people's living standards. The public's hygiene and quality requirements for food have increased, and the country has also begun to implement the food QS quality certification system in a timely manner. Everything has further promoted the prosperity and progress of China's color sorter industry.
    2. China's digital color sorter independent innovation process
    As the key foreign exchange export enterprise in Anhui, the development history of Hefei Taihe Company records the hard course of independent innovation of a national brand and is also a microcosm of the development process of China's color sorting machine industry. With the sense of urgency of “going against the water and not going back, Hefei Taihe Company always regards innovation as the only appeal of the company. It is also because of its own, extensive cooperation and independent innovation that China’s color sorter industry can be in the international market. It plays an increasingly important role in promoting the modernization of the national grain processing industry and speeding up its integration with the international market.
      After years of hard work, Hefei Taihe has achieved tremendous technological advantages. As the key enterprise of optoelectronic industry in the four major industrial clusters of Hefei High-tech Zone, Hefei Taihe Optoelectronics not only created the national self-owned brand of China's color sorter, but also promoted the vigorous development of China's opto-mechatronics industry.
    The strong technical advantage has won considerable economic benefits for Hefei Taihe Optoelectronics. At present, the annual output value is over 100 million. With its advanced design concept and excellent product quality, Taihe Optoelectronics has won a broad domestic and international market, and its products are well received. User's favor. At present, the company's products in the domestic market share is basically stable at more than 60% , and exported to the United States, Pakistan, Southeast Asia, South America, Africa and other more than 20 countries and regions, showing strong development potential.
    3 . Prospect of the future development trend of color sorting machine
    The color sorter has undergone a single-color selection to double-sided color selection, from CMOS sensor to CCD . From analog to digital development, the technology is becoming more mature, but the color selection technology has not stagnated, but it has developed faster and faster. In the next few years, digital color sorters will mainly develop in two directions. First, the large-volume color sorting machine, the cost performance is further improved; the second is to develop in the fields of miscellaneous grains, dehydrated vegetables , chemicals, ore, and modularized configuration.