| As the indispensable diet in people's lives, soybean milk has many benefits. From ancient old-fashioned soybean-grinding to modern soybean milk machines, the production process of soybean milk becomes more mature. At present, the domestic production of soybean milk displays gradually a growing trend towards variety, and the market share of commercial soybean milk is increasingly growing. As the current domestic situation, the price of commercial soybean milk is costly. The main reason is that the CPU of control system is PLC. The design is highly reliable, but its cost is relatively high.Therefore, in order to meet different status of user's needs, a commercial soybean milk machine'control system which uses STC89C58 as its core is designed from the angle of reducing costs in this topic. In hardware, it is designed the circuit of clock, memory, key/display, USB interface, liquid level detection, current detection, electrical isolation and so on. On the base of cost saving, it can extremely make the system stable and reliable. In software, the commercial soybean milk machine's working program, such as technology and the management of abnormal states and so on, is written with C language, which realizes the function that the commercial soybean milk machine should possess. Besides, the system has a prominent characteristic that it can be easily lease. A PC interface, which based on VC++6.0 and U disk as its intermediary, is designed to input the rent's time into the control system of soybean milk machine, which realizes the control of rent's time and makes the machine walk off the job when the rent'time is reached.The results of field installation, debugging and a lot of following experiments show that the commercial soybean milk machine can satisfy the need of consumers. The soybean that the soybean milk machine grinded is exquisite, equality and tastes great. The soybean milk machine has excellent features such as low cost, complete function, convenient to use and so on. |
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