Design And Implementation Of Supermarket Intelligent Shopping Guide System Based On Indoor Positioning Technology

Large retail supermarkets have the advantages of rich products,convenient and fast,and have always been the first choice for people to purchase daily necessities.With the development of the new retail industry,the defects of this shopping model have gradually emerged.The problem of low efficiency of the shopping guide in the supermarket and the difficulty in obtaining the information of the commodity not only affects the shopping experience of the consumer,but also reduces the sales profit of the supermarket to some extent.In order to cope with the above problems,this paper designs and implements a supermarket intelligent shopping guide system based on indoor positioning technology.Based on Bluetooth positioning technology,the system designs the functions of shopper positioning virtual map,promotion product recommendation,product information query,supermarket message push and so on,aimed at improving the quality of service in supermarkets and the consumer experience of shoppers.The main tasks as follows:Firstly,the system needs are comprehensively analyzed,the overall architecture and functional architecture of the system are designed,and the four functional modules of the shopping guide system are defined,including virtual map,Bluetooth indoor positioning,commodity information query and message push.Then,a low-power positioning module based on Bluetooth 4.0 is designed,which mainly includes the design of hardware circuit,appearance and power supply scheme.The module configuration method and deployment scheme are given,and a virtual map is designed to support in the shopping guide client.Bluetooth positioning function.The client performs real-time search on the Bluetooth positioning module and determines its RSSI.The coordinates of the current client location are calculated by the three-point positioning algorithm and displayed on the virtual map,realizing the correspondence between the actual location and the virtual location.Thirdly,in order to realize the two-way communication between the client and the server,a set of Webservice interface is designed by using the.net platform,and the functions of product information inquiry and message push are realized by reading and writing the database.Finally,the system was tested.The Bluetooth positioning function was tested by two different deployment schemes.The maximum propagation radius of the Bluetooth positioning module at 0dBm transmission power was 12.5m,and the propagation sensitivity was-99.6dBm.The average positioning error of the two deployment schemes was 1.32 m and 1.36 m,the average delay time for obtaining the positioning coordinates is 1.42 s.For the client to invoke the Web service function,the delay time of the callback data is basically within 1s.The results show that the positioning accuracy,response speed and operational stability of the system meet the requirements.It is suitable for application in large supermarkets.It can also be used in public areas such as libraries and archives.