| Self-service washing machine is a service type of machine which is appeared to liberate users’ laundry time. Now, it is widely used in universities, factories and other collective apartment to in order to meet user needs. As early as 2004 years, our country began to produce coin-operated self-service washing machines and it is obtained the rapid development in 2006. So far, self-laundry market has coin-operated washing machines and brush card self-service washing machine. In terms of coin-operated self-service washing machine, the user need to prepare a certain amount of coins when using. At the same time, it is also need managers regularly clearing and cleaning the washing machine coins which is very inconvenient. However, the emergence of the brush card self-service washing machine has solved the problems of the coin-operated washing machine which is obtained the rapid development in recent years. But this model also need to purchase the cards in advance. With the emergence of online payment and perfection, it is provided us a more convenient consumption patterns: online payment mode. The user can through the online payment method such as e-currency payment or WeChat pay to make the consumption. Thus the consumer can thoroughly get rid of the process of preparing coin or cards in advance. In order to realize online consumption and offline service, this paper proposes a centralized controller design scheme which is based on embedded Linux.According to the requirement of online payment mode which is commanded by the Shanxi guest Ann washing machinery co., LTD. This paper make the overall design of the concentration controller of washing machine which is used to realize the online services and offline operation. Centralized controller uses the embedded ARM processor as the core of the controller, choosing embedded Linux as the controller software development platform.Controller hardware circuit uses the ARM S3C2440 chip as control core. To coordinate with the function of the controller, we design extension circuit of peripheral interface. Through CAN BUS MODE to make several washing machine in laundry room to connect with the integrated controller. Thus we make the realization of the washing machine and the centralized controller data communication. At the same time, through the WIFI will make the concentrated controller connected with remote server. Then we can implement controller to transmitting data and receiving instructions which is from the remote server. The controller saving washing machine real-time data to the database to make the convenient for the user to inquire through the man-machine interface. When the remote server requires some data of a certain washing machine, the controller will extract the corresponding the washing machine of the time data from the database via WIFI sent to the remote server.Design the monitoring program of PC with VB, and the database of consumptions data with Access, the VB program and Access has been connected by ADO, in order to store the consumptions data which had been seed by centralized controller to the Access, made the management and query of consumptions data more convenient.Finally, building experimental platform and debugging of the controller. According the testing, we verify the stability and accuracy of controller to the washing machine in the field of real-time monitoring. Furthermore, the author verify the possibility of online and offline services docking. |
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