Sorting is a material handling process in which a large number of different items are quickly sent to a number of destinations according to their requirements. In the past, the sorting of articles is generally carried out by manpower and with the help of simple machinery. Its main disadvantages are large labor, low efficiency and high error rate.
With the development of production and business chain business model and the increase of commodity varieties, the sorting system has become an important facility in various industries, such as postal service, medicine, tobacco, books and other end distribution centers, as well as an important branch of material handling automation.