The Research And Design Of Supermarket Mobile Selfservice Shopping System

The traditional supermarket shopping process is composed of commodity purchase,manual settlement,cash payment,commodity degaussing and commodity anti-theft.With the development of "Internet plus" and "New retailing",some supermarkets have launched the self-service of mobile shopping,"Mobile shopping by phone scanner",based on the technologies of barcode recognition and mobile payment,to simplify the cumbersome traditional shopping process.It allows user to complete shopping steps of purchasing,settlement and payment in one time using the mobile phone.However,compared with the traditional supermarket shopping process,this kind of shopping method only realizes the half of functions.The function of degaussing anti-theft electronic tag on the commodity packaging has not been realized,which leads the supermarket to be unable to use the original anti-theft detection device to detect if the user has carried unpaid goods out from the export channel.The risk of commodity theft has increased.At present,some supermarkets add the commodity checking step in the shopping process of "Mobile shopping by phone scanner" to reduce commodity theft,open other export channel and check the paid and bagged goods before the user leaving.But the checking speed is slow,easily causing a bad user experience such as "queue waiting".So,in order to improve the shopping mechanism of "Mobile shopping by phone scanner",this thesis designs a supermarket mobile self-service shopping system,added the commodity degaussing function to adapt to the supermarket original commodity anti-theft system.At the same time,taking some no anti-theft electronic tags' commodity into account,we reserve the commodity checking step,using the commodity weight obtained at commodity purchasing step to optimize commodity,checking by matching the current weight automatically within the commodity weights of the user's order and displaying the checking commodity information on the touch screen as the order of weight priority.Supermarket mobile self-service shopping system is based on the B/S architecture,consisting of the shopping cart device assisting user to shopping,the mobile application on the phone and a server.The shopping cart device is based on the embedded system,using the pressure sensor to collect the good weight,uploading the weight data to server by wireless communication method and receiving the corresponding response.The mobile phone application adopts WeChat applet and WeChat payment to realize the functions of shopping cart association,commodity purchase,settlement,payment and electronic shopping receipt acquisition,to satisfy the user's shopping demand.The server side uses Django framework and MySQL database to build a supermarket backend management system,which realizes the processing and storage of user data uploaded by the shopping cart device and the mobile phone application.Then the shopping cart device degausses the RF anti-theft electronic tag and displays the checking information,finishing the shopping process.Since the shopping cart device communicates with the server through the HTTP protocol,and HTTP protocol has the disadvantage of clear text transmission,this paper also designs a security protocol for the embedded device according to the system security requirements.The unique hardware identity information of embedded device is used to implement encryption and decryption of the pivotal requested data in the data transmission between the embedded device and the server.And the idea of digest authentication is used to finished the twoway identity authentication and data verification,which ensures that the data source is reliable and not tampered.Finally,the function modules and system security are tested in the thesis.The result shows that the system functions well and meets the user's demand for mobile selfservice shopping.The actual operation of the security protocol is feasible.