How does the unmanned vending machine system work?

Many people often see unmanned vending machines on the street, in hospitals, and shopping malls. They are very curious about what the internal system of unmanned vending machines looks like. The author will briefly introduce the main control system of the vending machine itself. The operation of each part of the vending machine, including the conveying mechanism, lighting, compressor, electric heating, buttons, cash module and various detectors. Before the Internet entered, vending machines operated in a purely master control system for decades. Fuji Electric's old vending machine manufacturer has accumulated rich experience in this field. The current mass production model is based on continuous improvement of the main control codes of the past. Especially for the control of the sales process, the timing control of various components, and the increasingly important energy-saving control, it has great advantages. The vending machine system adopts the self-developed sass system, which can realize the direct operation of the background system by the mobile phone, which is convenient and fast. In recent years, with the entry of peace, the original master control system is also facing updates and changes. The biggest change is the transfer and simplification of functions. In the past, many functions from host control have been transferred to industrial control and even cloud. Many manufacturers only install the control panel on the machine and send commands directly from the industrial control to the control panel. Industrial control systems had application scenarios before the arrival of the Internet era, such as offline card payment, wired/Bluetooth printing, near-field data collection, screen product selection, and so on. However, large-scale applications and outbreaks have developed rapidly after the Internet entered, from the earliest simple DTU (data transmission module) to electronic payment to various types of human-computer interaction. The communication system is particularly important in today's era of Internet of Everything. The current common perception is that each vending machine is regarded as a terminal, connected to the world. On this channel, data is running, and communication between the industrial control of the unmanned vending machine and the cloud server is realized.