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RFID precast concrete component production intelligent manag

I. Introduction
       At present, the domestic industrialization of housing is being vigorously promoted, and the prefabricated concrete structure as a form of industrialized building structure has gradually received renewed attention. The prefabricated concrete structure is to split the concrete structure into a variety of prefabricated component units (beams, columns, floor slabs, etc.), cast in the prefabricated component factory, and then transported to the construction site, hoisted in place for construction of the connection points, forming an assembly type structure. It can be seen that prefabricated components run through the entire housing industry supply chain, so how to carry out the life cycle management of prefabricated components to realize real-time positioning, tracking and monitoring of them, and timely obtain the basic status, usage, location and other information of the components, and carry out Information processing has become the key to realizing housing industrialization.
        With the development of public information platforms and the development of information integration technology, information technology has begun to be widely used in enterprise management. As a new generation of automatic identification technology, RFID technology is applied to the circulation of prefabricated enterprises and will completely change the traditional The supply chain management mode of the company greatly improves the operating efficiency of prefabricated enterprises and achieves the goal of refined management of prefabricated components.
        Second, the principle of RFID technology
        RFID technology, or radio frequency identification technology, is a radio wave communication technology that can identify a specific target through radio waves and display the relevant information contained in it without establishing optical or mechanical contact between the identification system and the specific target. The RFID system consists of an RFID reader (PDA), tags and application systems, and mainly includes three features:
     (1) Non-contact information reading, free from the interference of coverings, can communicate over long distances, and have strong penetrability;
     (2) The information contained in multiple electronic tags can be received at the same time, and the reading of the information is convenient;
     (3) The anti-pollution ability and durability are good, and it can be reused.
       The reader generates an electromagnetic field by emitting radio frequency energy to the identification area. When the RFID tag passes through the area, it is excited and transmits information to the reader. At the same time, the reader can also send information to the tag and rewrite the data in the tag. The main functions of the reader include data communication with the tag and the transmission of identification information to the data management system by means of a network connection.
        3. Life cycle tracking management process
        1. Production stage of prefabricated components
        In the component production stage, RFID tags are installed on the components during the production of prefabricated components. RFID tags mainly record basic information such as the manufacturer, production date and record product inspection records. The inspection records mainly include molds, steel cages, aluminum windows, embedded parts, and electromechanical products. , Product size, maintenance, tile and shipping inspection, etc. 10 items. At the same time, the component product number (ID) corresponding to the design drawing and construction drawing should also be recorded. This product number is unique to the component, which is also the basis for the component to be identified in the future. At the same time, according to the previous analysis of the required information at each stage, combined with appropriate coding principles, the component information is input into the RFID tag in the form of coding, and the RFID tag becomes the "identity" symbol of the component.
         2. The transportation stage of prefabricated components
        The transportation process of precast concrete components is the process of transporting the components produced in the factory to the construction site for installation and splicing. The transportation process of prefabricated components should include four links: loading, transportation, unloading and stacking. The management content at this stage involves more logistics management. As the prefabricated component is a relatively special product and requires a professional loading and unloading team to load and unload, its transportation, stacking, and hoisting are often completed by the component supplier.
         3. The prefabricated components are in the stacking stage
        After the components are transported to the construction site, they need to be temporarily stacked in the storage yard. At this stage, the daily maintenance, monitoring and positioning of the components are required. The stacking sequence should be strictly in accordance with the construction and installation sequence. After the components arrive at the yard, they need to master the basic information of the components and check the storage status at any time. Register the specific stacking position of the component to ensure that the target component can be found accurately and quickly when installation is required.
         4. Installation stage of prefabricated components
        RFID technology can not only realize real-time positioning of components, but also monitor the progress and quality of component installation. Since each component will carry its corresponding technical file and RFID tag at the same time during installation, the installation engineer can correspond the component to the installation construction drawing one by one based on the information in the technical file and RFID tag. The RFID tag includes component number and connection project. Basic information such as project number and connection engineering technical standards.
        Four, engineering application cases
        At present, RFID technology is mainly used in three projects of Yuanzhou Village Phase V, Kai Tak 1A Parking Lot, and Shatian 52 District Phase 3 and Phase 4. Among them, the RFID tags of the Kai Tak 1A project are embedded in the prefabricated floor slabs of the parking lot, and all the prefabricated external walls of the Shatin 52 area 3 and 4 projects are equipped with RFID tags, and for the convenience of reading and writing, they are embedded in the prefabricated external walls. Near aluminum windows.
        V. Conclusion
        Prefabricated concrete components are the basic elements of prefabricated houses, which run through the entire housing construction supply chain. To vigorously develop prefabricated houses and realize the industrialization of houses is vital to the life cycle management of components. The application of RFID technology to the tracking management of prefabricated components will help optimize the construction of the supply chain, improve the performance of the supply chain, integrate the supply chain information, and realize the real-time monitoring of the management content of the production, transportation, stacking, installation progress and quality of the prefabricated components, and improve Construction efficiency, shorten the construction period, and reduce the management cost of the whole life cycle. In short, the application of RFID technology to the refined management of prefabricated components will surely promote the development of China's residential industrialization.