The latest solution to the early warning mechanism of prison management
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Preface
There have been many recent escapes. The cases of severe prisoners escaped from Anhui Jieshou Detention Center and Hohhot Second Prison in Inner Mongolia and killed and injured prison guards have caused people to pay more attention to prison security mechanisms and seek to be more technological and intelligent. An advanced early warning mechanism for prison management.
With the further development of informatization and the implementation of the strategic policy of “Strengthening the Police with Science and Technology”, in the special environment of prisons, relying on traditional video surveillance systems or alarm systems or access control systems appears to be independent and difficult to support in the complex scene. Even if multiple systems are applied at the same time, the linkage and combination of many functions cannot be seamlessly combined, because there are too many surveillance cameras, and the limited police force cannot monitor the real-time status of each camera at the same time. As a result, some safety hazards have been highlighted. Use modern technical means to combine the actual situation of prison management to establish a set of implementations: video surveillance, real-time positioning of prisoners, cross-border (dangerous area) alarms, real-time statistics, regular roll-calling, statistics on entering and leaving prisons, and tracking of key personnel’s actions, A multi-functional prison real-time monitoring system with functions such as trajectory playback, police patrol, police force distribution, overtime alarm positioning in the prison, control of all doors of the police entering and exiting the prison, and positioning of foreign personnel (vehicles) in the specified area.
At the same time, the system uses wireless instead of wired network for monitoring and tracking, which can bring many benefits. For example, wired network can only use surveillance video and other monitoring methods in fixed areas. It will form monitoring blind spots in areas that cannot be wired or inconvenient for wiring, which is easy to be ulterior motives. People use it to eliminate blind spots in monitoring. The wireless network adopts wireless transmission, which improves the flexibility of monitoring. At the same time, the deployment of the wireless network is less difficult and the maintenance cost is low.
In the event of an emergency, how to discover and monitor the scene of the crime in the first place, and to timely and accurately control the location, time, and personnel involved in the incident, so as to provide effective analysis and data for further control of the situation. Therefore, it is imperative to implement the linkage and integration between the positioning implementation supervision system, access control system, video monitoring system, and alarm system applied in prisons and detention centers, so that the entire system can achieve some linkage functions between each other, and each system can also interact with each other. It can operate independently, and when one system fails, it does not affect the normal operation of other systems. New technology helps police improve the level of supervision, and also brings changes to traditional thinking and working methods. It is profoundly changing the traditional way of supervision.
1. The current composition and shortcomings of the supervision system of detention centers and prisons
Power grid, height limit, access control, video surveillance, abuse alarm, perimeter alarm, intercom, interview, attendance, patrol, fingerprint system, prisoner police entry system, etc. are the main components of the supervision system, but these systems are all independent , Are not related to each other, and there is an urgent need for a system that can connect these independent systems to achieve linkage.
Upin’s Wi-Fi real-time positioning system can link these isolated systems by providing real-time location information, making the entire supervisory system intelligent. The entire system uses Wi-Fi network as the basis to realize real-time positioning, voice, video, communication, cross-border warning, police area warning, running track playback and many other functions. The network adopts the world’s most advanced encryption method and visualization in the form of Web The Chinese software management interface is easier to operate and manage. It is the latest systematic, comprehensive and intelligent management system for prison management.
2. Introduction of Wi-Fi real-time positioning system
Youpin Technology’s Wi-Fi-based wireless local area network real-time positioning system (Wi-Fi RTLS) combines wireless local area network (WLAN), radio frequency identification (RFID) and real-time positioning technology, in a wide range of wireless LAN coverage areas , To achieve complex personnel positioning, monitoring and tracking tasks, and accurately find the target object, to achieve real-time positioning and monitoring management of personnel and objects.
(1) Working principle
The working principle of the RTLS system is shown in the figure below:
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Schematic diagram of the working principle of the real-time positioning system based on wireless local area network (Wi-Fi)
Where the wireless local area network is covered, the positioning tag worn on the person periodically sends out a signal. After the wireless local area network access point (AP) receives the signal, it transmits the signal to the positioning server. The location server judges the location of the person according to the patented algorithm model created by Youpin Technology, and displays the specific location on the electronic map.
(2) System composition
The wireless local area network real-time positioning system (Wi-Fi RTLS) is composed of the following three parts: Wi-Fi Tag, wireless local area network access point (Access Point), and positioning server (Locating Server). The wireless LAN access point can use any product that supports 802.11b.
The structure of the real-time positioning system of UF Technology’s wireless local area network is shown in the figure below:
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RTLS system architecture diagram
As shown in the figure above, the wireless local area network real-time positioning monitoring system is mainly composed of three parts: positioning tag, wireless local area network access point (AP) and back-end monitoring management center (positioning server):
Positioning tags are worn on persons or objects as wireless modules, and the system can track and locate persons and assets by tracking the tags.
Personnel tags can be designed with different shapes according to needs, wristband tags, badges, etc. to meet different needs.
AP adopts 2.4GHz frequency band, supports 802.11b/g mode, collects tag information in time, transmits it to the back-end monitoring center, and controls and manages positioning tags.
The monitoring management center installed with the positioning server software system mainly realizes real-time data analysis and processing. Analyze and manage tag data, monitor and display the location of each field tag in time through the electronic map of the control center. The data can be stored in the storage database at the same time. The monitoring personnel can access the storage server through the computer to query the real-time location information, alarm information, and alarm information of personnel or objects, and Movement trajectory within a certain period of time, etc.
(Three), realize the function
1. Real-time monitoring
Personnel location information: Display via electronic map or list, searchable.
Prisoner’s location
Prison guard location
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Monitor the label being located on the page
Personnel movement track: Real-time display of one or more persons movement track through electronic map
Track the designated person: The map automatically switches with the movement of the label, and the current status of the label can be seen by moving the mouse on the label
Personnel alarm status information: Display the alarm status of personnel through different colors and shapes on the electronic map
2. Alarm function
(1) Button alarm: The prison guard label has an alarm button. Once an emergency occurs, you can press the alarm button. The monitoring center point positioning system will receive the alarm information and alarm location in time, and quickly find the scene of the incident;
Wristband snipping alarm: When the wristband is worn on the prisoner’s hand, the prisoner can’t take it off by himself. It can only be cut off. To prevent the inmate from cutting the wristband, the anti-wristband snipping alarm function of the designated tag can be activated in the system. If the prisoner puts the wristband on If it is cut off, the tag will continuously send cut off alarm information to the system. Of course, if the wristband must be cut for some reason, you can turn off the anti-wristband snipping alarm function of the specified label in the system, and then cut the wristband, so that the system will no longer accept the wristband of the label Cut off the alarm information;
(2) Regional alarm
Cross-border alarm: Some areas are restricted areas. Unauthorized tag entry will send out an alarm message, or some prisoners cannot leave a certain area, once they leave, an alarm message will be sent out;
Entry and exit alarm: When entering and exiting certain gateways, which tags can pass through can be set in advance, and an alarm message will be issued when tags that do not meet the requirements are entered and exited;
Electronic fence alarm: Instead of entering and exiting from a normal door, but crossing a designated area from a fence or other place, an alarm message will be issued;
Alarm inconsistent with the management information system: The prisoner has set the room number in the system. Once the prisoner enters the wrong room, an alarm will be sent out in time.
Disappearance alarm: There are many factors for the disappearance of the label (such as the battery is dead or destroyed, the label crosses the signal coverage area, etc.), you can set the disappearance alarm condition and alarm level of the specified label. If the label disappears, the corresponding alarm will be triggered ；
Low battery alarm: You can set the minimum power limit in the system, and once the label power is below this limit, an alarm message will be issued;
Vibration alarm: If the tag has a vibration detection function, you can enable the tag’s vibration alarm function. The tag will report its vibration state (vibrating or static) to the system every once in a while, and the system can perform overtime detection according to the vibration state ( Long time immobilization), if there is no movement for a long time, an overtime alarm message will be issued;
Other alarms: add different alarm methods according to requirements
Alarm for failure to follow the prescribed route: Specify the walking trajectory of a certain tag in a certain period of time. Once the label is found to deviate from the specified walking trajectory for a certain period of time, an alarm message will be issued;
Alarm without accompanying personnel: Bind the prisoner tag and the police tag, one-to-one or many-to-many binding, when the walking track of the prisoner tag is inconsistent with the walking track of the police tag, an alarm message will be issued for a certain period of time.
3. History query
(1) Track playback
You can lock a label, play according to time period, display movement (with or without track), and switch the map;
You can lock a map, play it according to the time period, display the movement of different labels, and no track;
Various alarms (buttons, areas, disappearing, vibrating, not moving) and sound effects can be displayed during the track playback;
Can be played in full screen;
Can save a certain track record;
A certain piece of data can be saved, and it can be recalled and played;
Multiple players can be used at the same time.
As shown in the figure below, it is the track playback of a certain positioning label in a certain period of time:
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Track playback of a certain positioning tag in a certain period of time
Query location history: the location change record of any label
Query alarm history records:
Query operation history: related operations on tags
4. System integration function
(1) Linkage with video surveillance system
Right-click on the label, you can choose to view the video surveillance;
When an alarm occurs, the camera near the location of the tag can be automatically called to view the video surveillance.
(2) Combination with one card: Prison guard location card combined with existing access control card
(3) Information management system: Integrate with the existing information management system platform), and bind tags and personnel.
(4) Dynamic roll call: concretely show the number of people who should arrive, the number of people who have arrived, and the number of people who have not arrived
3. Advantages of Wi-Fi real-time positioning system
The design of the entire system scheme runs through the following principles:
When designing the entire system, the starting point is advanced technology, reasonable architecture, mainstream products, low cost, and low maintenance.
Advancement of technology: The selection of the entire system and the configuration of software and hardware equipment should conform to the trend of high and new technology, and adopt the latest Wi-Fi RTLS technology in the world.
Reasonable structure: Adopt advanced and mature technology to structure each sub-system, which can make it run safely and stably, effectively eliminate the bottleneck that may be generated by each system, and ensure that each sub-system has good scalability through appropriate equipment. Stability and safety are our top concerns. Only a stable and reliable system can ensure the normal operation of all equipment.
Stability: The system is based on a stable, safe, and confidential large-scale database to ensure the normal operation of the system. It has a complete management system such as good data sharing, real-time fault repair, and real-time backup.
Security: The system adopts international standard wireless encryption methods such as WEP, WPA, WPA2, and the label supports digital encryption technology, which has high security. On the basis of turning off AP wireless communication, accurate positioning can also be achieved. This is the unique feature of our system. Especially, the system is applied to the secret industry to ensure the security of the system. Compared with other systems such as RFID, Security has an absolute advantage;
Conform to the mainstream development direction: Network equipment conforms to the mainstream development direction in the market. According to the actual situation of the positioning environment and the various products on the current market, select network products with the best performance-to-price ratio and expansion capabilities.
Low cost and low maintenance: The products used should be simple, easy to operate, and easy to maintain. The easy operation and easy maintenance of the system are the conditions to ensure that non-computer professionals can use a system well. Our solution integrates the existing rich network design and construction experience, as well as powerful products in the field of integrated transmission of digital images, voice and data. Advantages to achieve the required design requirements.
Compatibility: All systems are relatively open systems. Different products have standard interfaces and provide multiple communication standard protocols, which can facilitate the access of third-party equipment.
Modularization: the establishment of various sub-systems up to the overall system strictly implement the modular structure to meet the needs of system function expansion, replacement and maintenance of operating equipment, and ensure the efficient and reliable operation of the system.
Scalability: Using object-oriented and modular development technology, software and hardware modules with other functions can be expanded at any time as needed, with good scalability.
Centralized management: remote field equipment, each sub-system is centralized in the center for unified control, implementing the control and setting of all remote equipment to ensure that the system performs its management functions efficiently, orderly, and reliably.
Upgrade maintenance: The system takes into account the actual needs of the future system for increasing and modifying the capacity and functions. The positioning system can upgrade the software, and the operation is simple. The operation should be completed by the system administrator without complicated operations and special Technology.
4. Successful application cases of Wi-Fi real-time positioning system
Suzhou Youpin Technology focuses on the research, design, production and sales of Wi-Fi wireless local area network real-time positioning systems. There are currently many successful application cases in China.
1. The location management of prisoners and prison guards in the monitoring system of a prison in Inner Mongolia.
2. The positioning and monitoring system for prisoners and prison guards in a detention center in Jiangsu.
Prisoners and prison guards wear positioning tags and deploy wireless local area networks throughout the prison area to achieve intelligent and efficient management of prisoners. It can realize dynamic real-time roll call of prisoners, pre-alarms in prison areas and windproof areas, tracking behaviors of key prisoners, historical operation track query, prison guard patrol route monitoring, emergency button help alarm, video monitoring and positioning monitoring linkage, etc. .
We believe that as prisons and detention centers have higher and higher supervision requirements, the Wi-Fi real-time location monitoring system (Wi-Fi RTLS) can greatly improve the efficiency of supervision and deal with various emergencies in a more timely and effective manner. , Through this system, the intelligence of various supervision methods is greatly improved, and the idea of escape from prison, especially for serious prisoners, is greatly reduced. Usually, by observing the position of the prisoner, combined with the prisoner’s early warning system, the prisoner’s situation can be found in time. Thought fluctuations can prevent prisoners from escaping in advance, which has achieved a combination of pre-prevention and post-prevention.
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