Radio frequency identification (RFID) technology is gradually being widely used in supply chain, logistics, transportation, anti-counterfeiting and many other fields because of its unique non-contact and ability to identify multiple objects at the same time. Because of the particularity of automobile production environment and the complexity of production process, how to apply RFID in automobile production line is a problem worthy of study.
This paper mainly studies the RFID information integration mode and key technologies in automobile production line. Firstly, this paper introduces the research background and problems, and summarizes the application research of RFID at home and abroad, especially the application of RFID in manufacturing industry and the related research status of information integration. On this basis, the research objectives, specific research contents and research methods of this paper are put forward.
Based on the introduction of RFID technology and the basic process of automobile production, the application links and functions of RFID in automobile manufacturing and discrete manufacturing are investigated statistically by content analysis method. Combined with the in-depth investigation of the current situation of information management of automobile production line, it is pointed out that the application links of RFID in automobile production line are welding, painting and assembly, and the specific application functions of RFID in the corresponding links of automobile production line are put forward.
Based on the existing research results, this paper puts forward an improved classification method of horizontal distribution and vertical integration distribution, and studies the deployment and integration mode of RFID in manufacturing industry by content analysis. Combined with the application link and function analysis of RFID in automobile production line, a horizontal distribution and vertical multi-layer RFID information integration mode is proposed. On this basis, the integration framework of RFID system and MES is proposed. Finally, the key technologies of RFID information integration mode supporting horizontal distribution and vertical multi-layer automobile production line are simply analyzed.
Based on the analysis of the main factors affecting the reading and writing performance of RFID, the laboratory single factor test and multi-factor orthogonal test are carried out for the controllable factors. Through single factor test, the significance and influence law of the main influencing factors on the reading performance of RFID system are analyzed. Aiming at the main influencing factors, the advantages and disadvantages of comprehensive test method, simple comparison method and orthogonal test method are compared and analyzed. Through orthogonal asymptotic optimization test, the optimal combination level of many factors affecting RFID reading performance is put forward.
On this basis, a variety of tags are selected to be tested on the welding production line, and the layout scheme of RFID tags and readers on the automobile production line is put forward according to the test results. This paper puts forward the information processing flow of RFID system in automobile production process through investigation, and analyzes that RFID data on automobile production line can be stored directly through tags or in background data. On the basis of analyzing the characteristics of RFID data, this paper puts forward a form of RFID tag data content, and discusses the specific content of RFID data management. This paper puts forward the RFID data communication mode suitable for automobile production line, and puts forward two reader networking modes: RFID information integration based on XML and RFID application integration based on web service technology.
Finally, the overall framework of MES system based on RFID is constructed, and the functional model, physical model and information flow model of MES based on RFID are emphatically studied. Based on the analysis of the security requirements of RFID system in automobile production line, this paper puts forward to solve the security problems of RFID system from two aspects: management system and support technology. The basic framework of RFID system security management system is given. Technically, the security of RFID system is divided into two security domains, with the emphasis on the security between reader and application system. In this paper, intrusion detection technology is introduced into RFID system, and the improvement of intrusion detection is studied from two aspects: first, the data is preprocessed by clustering algorithm to reduce the computational complexity and improve the detection efficiency; Secondly, the immune particle swarm optimization algorithm is used to directly improve the feature selection and improve the detection accuracy. Finally, the framework models of the two methods are given. The research results of this paper have been partially applied to the construction of RFID system in the production line of C automobile company, and some achievements have been made.