Research On Vehicle Logistics Positioning System Based On Beidou

It is an important stage of promotion for beidou satellite navigation and positioning system in civilian field at present,and logistics transportation industry is the promoting focus.In addition,with the rapid maturity of shopping online,people have more requirements for informatization of modern logistics.Real-time query goods location is one of them.However,the existing logistics tracking system cannot show the location of the goods in real time,and the query way for users is complex.Therefore,the research on vehicle logistics positioning system based on beidou is put forward.It is hoped that can help users to view the location of the goods in real time and conveniently and can be contributed to the promotion of beidou satellite navigation and positioning system.The research on vehicle logistics positioning system based on beidou proposed in this paper is carried out from the following two aspects: tag anti-collision algorithm and system design.RFID technology is an important part of goods information identification,but tag collision seriously affects the efficiency of RFID reader to identify goods information.In order to solve this problem,the Schoute algorithm,which is widely used at present,is improved by using historical data to obtain the estimated linear correlation coefficients.The simulation results show that using the improved algorithm to estimate the number of tags can effectively improve the system identification throughput rate and reduce the number of time slots used.Besides,the problems of dynamic framed slotted ALOHA anti-collision algorithm based on group were analyzed and discussed.And combined with the improved Schoute algorithm and a new grouping scheme,the improved dynamic framed slotted ALOHA anti-collision algorithm based on group was proposed.The simulation results show that the throughput rate and the required number of slots by different group scheme are in opposite states under the same tag estimation algorithm.The improved grouping scheme has obvious advantages in system throughput rate,but the number of slots used was increased at the same time.Therefore,the selection of grouping scheme should be combined with the actual demand focus.In the system design,accurate location information was provided by beidou antenna and module,goods information for the terminal was obtained by RFID module,wireless transmission between the remote server and terminal was realized by 4G module,and convenient logistics information query interface was came true by small programs.Furthermore,the temperature of the carriage was feedback to the server and the small program for the users in real time as the environmental information together with the longitude and latitude.Finally,the basic software and hardware design of the vehicle logistics positioning system were completed and each part of the system was tested.The test shows that the design in this paper can real-time obtain and transmit longitude,latitude and temperature.And users can quickly and effectively view the real-time logistics information.A new idea of using small program to inquire the logistics information for users proposed in this paper avoided the disadvantage of lacking information feedback between logistics monitoring center and direct users in the existing research of logistics positioning system.The 4G technology and effective cooperation between each part of the system improved the real-time capability of system.Increasing the feedback and processing of environmental information laid a sufficient foundation for ensuring the special logistics environment.Moreover,the system not only play a role in promoting logistics positioning system informatization,but also have more application scenarios.It has great promotion value.