RFID smart card prison personnel positioning management subsystem scheme
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1 System function
Prison personnel (including prison guards and prisoners) positioning system is specially designed and developed based on the current state of the art RFID smart card technology, based on the activities of prison guards and criminals, according to the needs of sub-regional management and monitoring, and the emergency alarm function when a dangerous situation is discovered. An application system combining software and hardware. The system enables the management officers to grasp the number and information of criminals in each controlled area of the prison in real time, as well as the information of the surrounding officers on duty, which can greatly enhance the ability to respond quickly to various suspicious events and emergencies. In the event of an emergency, it can accurately and quickly locate relevant personnel and police officers on duty, and can quickly query the historical trajectory of personnel in the prison.
Specific implementation: The location area is densely covered with long-distance card readers throughout the prison. All police officers, staff, and prisoners who need to be located are equipped with RFID cards. The RFID cards are active long-distance cards with a working frequency of 2.45GHZ. The guards are general An RFID card with an emergency alarm button is used, while the prisoner is equipped with a wristwatch-shaped card with the same chip. When the card holder enters the reading and writing area, the RFID card automatically transmits data to the nearest card reader at regular intervals. Each reader is connected to the central management computer through the network. In the central duty room, a large monitor is installed on which the electronic map of the prison is displayed, and the distribution of the personnel is displayed on the map in real time (for example, with a flashing red dot. ), motion trajectory, etc. When encountering an emergency alarm situation, the electronic map will give an eye-catching reminder at the corresponding location, and give an alarm reminder through voice or sound and light alarms, etc. The on-duty police can instantly locate the geographic location where the abnormal event has occurred according to the screen prompts, and make timely reaction.
A fixed RFID card is installed in each cell and surrounding sentry posts. When prisoners fight and make trouble in the cell or the sentry guards find abnormal situations such as prisoners wanting to escape, they can press the emergency button on the card to proceed. Alarm, the center will deal with it immediately after receiving the alarm. The sentry post can be installed with multiple cards, and each card alarm represents a different meaning, and the central monitoring automatically recognizes it.
1.1. The hardware characteristics of the system:
1) Communication network: The general prison area is relatively large, and the readers cannot use the general RS485 bus network to connect to the management center. In this system, in order to solve the problem of transmission distance, RS485 optical transceiver is used, and all readers in a certain range are used. After the device is networked through the RS485 bus, the optical fiber is used for transmission through the optical transceiver.
2) Requirements for RFID cards: The RFID card used in this system is an active long-distance microwave card, powered by a battery, charged by a solar battery, working frequency 2.45GHZ, with waterproof function, and the card reading distance can reach more than 100 meters. Each tag is written with designated data in advance, so that the computer can identify the corresponding cardholder’s identity, and all persons who need to locate must carry it with them. For prisons, compulsory means and appropriate measures must be taken to ensure that the RFID card is inseparable from the criminal’s body, such as it can be embedded in a strap-type device and tied to the wrist or ankle.
3) Install a sufficient number of readers: The number of readers should be able to meet the needs of positioning calculations. This system uses a directional super-power card reader to ensure that the RFID cards equipped with personnel in the positioning area are effectively reading Card range. If there are too few readers, there will be blind areas for card reading, which will cause inaccurate positioning. The reader should be installed firmly, and its power supply and data transmission facilities should not be easily damaged.
1.2. Other features of the system:
1) High recognition accuracy: frequency hopping technology is adopted, and the effect of anti-interference between the same frequency is good, and multiple cards can be recognized at the same time, up to 200 cards can be recognized at the same time;
2) Adopt a globally unique identification number, which is reliable, safe and non-duplicated;
3) Equipped with a mobile identification station (handheld reader) for use in special circumstances;
4) Long-distance: it can be identified within 100 meters to realize automatic identification;
6) Support high-speed mobile reading, and the moving speed of the identification card can reach more than 200 km/h;
7) High reliability, working temperature -40℃~85℃, waterproof and shockproof, suitable for operation in harsh outdoor environment;
8) High anti-interference: There are no special requirements for various interference sources on site, and the installation is convenient and simple;
9) The global open ISM microwave frequency band does not require application and payment;
10) Ultra-low power consumption: safer and healthier for the human body.
2 system composition
The personnel positioning and emergency alarm system consists of the following equipment:
Long-distance card reader
Active long-distance card (RFID standard card, card with emergency button, watch-type special-shaped card)
Networking equipment (RS485 optical transceiver, RS485HUB)
Center large display (standard)
Alarm system (alarm drive board, sound and light alarm)
Management workstation (database software, personnel positioning software)
3 System network structure and alarm diagram
3.1 Personnel positioning network structure diagram
3.2 Schematic diagram of system assault police alarm
In the effective monitoring area, when a prisoner attacks a prison guard and other vicious events, the prison guard can press the emergency button on the RFID card that he wears to call the police and ask the center for help.
For detailed solutions, please contact: Shenzhen Newbell Electronics Co., Ltd.
Phone: 0755-83673820-211
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