RFID technology prison intelligent management and security system

　　RFID technology prison intelligent management and security system

　　Electronic wristband RW-T 709 is a multi-functional composite tag that integrates radio frequency chips in the three frequency bands of 2.4GHz, 125K, and 13.56MHz. This electronic wristband can realize the two basic functions of personnel positioning and personnel identification, so as to use this feature to further realize detainees’ cross-border alarm, cross-area alarm, designated route monitoring, emergency investigation, proximity alarm, emergency call and prison area Various prison management functions such as all-in-one card management. In addition, the RW-T 709 electronic wristband for prison detainees also has an anti-disassembly function to prevent detainees from destroying the electronic wristband. The prison management system is a visual application system that uses RW-T 709 electronic wristband to manage and monitor prison guards and detainees in response to the needs of all parties in the prison. The system can keep track of the positions of detainees and prison guards, real-time identification, positioning and tracking indoors and outdoors, providing prison managers with valuable real-time location information, condition warning information, active alarm information and other comprehensive management information. At the same time, it enables prison managers to grasp the number and information of detainees in various controlled areas in the prison in real time, as well as information on prison guards patrolled around, thereby improving the security level of prison guards and equipment. The prison management system also uses the all-in-one card function of the RW-T 709 electronic wristband to realize the all-in-one card for internal consumption, attendance, and access control in the prison. Through the high-tech functions of RW-T 709, Renwei Electronic Prison Management System finally improves the efficiency and level of prison management through accurate real-time information methods, and significantly improves the efficiency and benefits of prison management.

　　2. System design

　　2.1 Guiding ideology and principles of system construction

　　The system construction aims to improve the informatization level of prison management and prevent escape incidents. It focuses on real-time, high-efficiency, and scientific management of prison management. With the goal of benefit and quality, the system design and overall planning shall be carried out within the overall framework of the construction of the digital information supervision area. The process of informatization and modernization of the management and administrative management of detainees in the district.

　　System development and construction follow the following principles:

　　2.1.1 Focus on overall planning

　　The intelligent management and control system for detainees is composed of four subsystems: basic situation management of detainees, wristband label management, electronic map range positioning, and detainee evaluation management and control. They belong to the different application levels of the overall support platform of the digital prison area. Situation management and wristband label management belong to the basic data layer of the overall platform, and belong to the same basic platform as unit management, dictionary library management, and detainee authority management systems; electronic map management and personnel assessment management and control systems belong to the application layer of the overall platform. Therefore, it is necessary to carry out system planning within the framework of the overall support platform of the digital surveillance area, and design and develop it as an integral part of the construction of the digital surveillance area.

　　2.1.2 Based on independent research and development

　　The core technology of the system construction adopts the standard 2.4G and 125K low-frequency trigger technology commonly used in the market, and the 2.4G transmission efficiency reaches 2Mbps. There is no need for continuous work between the receiving end and the transmitting end, which greatly reduces power consumption and extends battery life. time. At the same time, in order to avoid the phenomenon that the 27Mhz wireless frequency band is prone to mutual interference, 2.4G also adopts automatic frequency modulation technology, and the receiving end and the transmitting end can find the available frequency band. In addition, it is more important that the 2.4G radio frequency technology is a two-way transmission mode to avoid 27Mhz unidirectional transmission that is prone to signal discontinuity. 2.4Ghz is a public frequency band and does not require any organization or individual to pay patent fees, and its cost is much lower than other wireless network technologies (such as WiFi/Bluetooth, etc.). Use 2.4G wireless module to cooperate with our company's independent research and development of auxiliary circuit and single-chip encryption processing program to form a safe and stable electronic positioning system.

　　2.1.3 Focus on future development

　　In terms of the overall system architecture, service equipment selection, wristband tag type, basic data collection, etc., fully consider the realization of subsequent functions, taking into account the compatibility of equipment, system scalability, function scalability and application diversity;

　　2.1.4 Strengthen system specifications

　　System development and resource construction conform to a unified technical specification and characterization system, pay attention to the continuity and sharing of development work, and pay attention to leaving standardized data and control interfaces for subsequent system development and promotion. Unified development of technical indicators such as application technology, data storage format, signal transmission format, interconnection interface mode, etc.;

　　2.1.5 Exerting construction benefits

　　System development and construction should combine the actual conditions of the prison area, and further strengthen the management of the prison area on the basis of the existing system; follow the overall planning, construction while using, and gradually improve the construction ideas to give full play to the construction benefits.

　　2.2 System principle

　　The prison’s intelligent management and security protection system uses RFID electronic tags as the most advanced identification code at present. It has the characteristics of not easy to be damaged, reliable data, long service life, and long effective communication distance. It is a substitute for barcodes and infrared rays. The best choice for logos. Install it on the controlled target and use it as the unique identifier of the target for tracking and positioning. At work, managers use networked wireless identification base stations to track and locate targets.

　　2.2.1 The working principle of electronic tags

　　Electronic tag (RFID) technology is a radio frequency automatic identification technology that uses radio frequency signals and their spatial coupling and transmission characteristics to realize automatic machine identification of stationary or moving items to be identified. The system is developed through electronic tag technology , Produced two products, electronic wristband and prison guard card.

　　Radio frequency identification system generally consists of three parts, namely, electronic tags, readers, and background management software. In the application, the electronic tag is attached to the object, equipment, or person to be identified. When the object, equipment, or person attached to the electronic tag enters the reading range of the reader, the reader will automatically wirelessly send the agreement in the electronic tag The identification information receives or writes specific information, so as to realize the function of automatically identifying items or automatically collecting item identification information.

　　2.2.2 RFID automatic identification technology principle

　　The system composed of RFID and short-range communication equipment mainly includes two parts: smart RFID and RFID read-write units (RWU). The wireless communication between the read-write equipment RWU and RFID realizes the communication between the information management system and RFID. Information exchange.

　　The read-write device RWU is an RFID read-write controller, which is composed of a microprocessor, a security module, a microwave communication controller and communication interfaces such as RS232, 485, TCP/IP, etc. It uses short-range communication protocols and microwave wireless transmission methods to realize RWU For the purpose of safe and reliable information exchange with RFID, RWU connects to the host computer through RS232, 485, WIFI, GPRS, TCP/IP, etc., receives control commands and data from the host computer and returns data.

　　2.2.3. Principles of Regional Positioning and Tracking

　　We use RFID semi-active technology for personnel area positioning management. In each monitored area, such as each room, a semi-active positioning base station is installed, which is our company's low-frequency activator. Each low-frequency activator has 4 channels. Or 6-way activation antenna, adjacent 4 or 6 rooms can share a low-frequency activator. In our positioning system, the positioning base station is the smallest base point, as the nearest base point of the positioning point, its activation tag The distance is 3-3.5 meters, that is, each tag is activated within the range of 3-3.5 meters from the activator, and its positioning accuracy can be described as 3-3.5 meters. Activators in different areas have their own unique address codes. When personnel enter the positioning base station with a semi-active low-frequency activation tag and are activated, the tag works normally and sends the ID number of the tag to the outside world and also sends out the activation tag. The address code of the activator, in this way, through the address code of the activator, we can locate the location of the tag. When the tag is taken from one activator to another location, the uploaded activator address code will also change accordingly, thus forming a complete positioning system. The data uploaded by the tag is received by a large-scale positioning base station gateway, and the information is uploaded to the management center for processing, completing the entire positioning system.

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