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In recent years, the frequent occurrence of child abuse on campus has cast a shadow over the campus that is supposed to be a joy to challenge the sensitive nerves of the public and torture the current status of campus security management. From the introduction of the government's 2017 campus normative opinion, to the successive formulation and enforcement of local standards, the urgency of campus security construction is reflected, and the promotion of the construction of “safe campusâ€, whether it is an ordinary university or a primary and secondary school Kindergartens need to speed up the process of technical protection and get rid of the state of security that is mainly based on physical defense.
Based on the changes in the current campus security environment, many new features have emerged in the campus security work in the new era. The school urgently needs to upgrade the system or re-establish a new security system on the basis of the existing security system. The perimeter alarm system, as an important first line of defense on the campus, can solve the weak perimeter of the campus where illegal personnel can climb over at the source. It plays a role in blocking criminals from entering the campus to perform activities such as harming students and stealing, and exerting the functions of deterring illegal persons, blocking, and timely warning. It is one of the key and necessary security measures in building a safe campus.
I. Status and Problems of Campus Security
School border security is an important part of campus security. Perimeter measures as the first layer of campus security protection, with warnings, deterrence, deterrence, delays and intrusion alarms and other functions, it can not only effectively stop, delay the intrusion of the object of prevention, but also provide sufficient response time for human protection. Therefore, it is more and more urgent to build a complete system of pre-warning, prevention, and traceability. In recent years, many schools around the country have strengthened the prevention and construction of campus perimeters. However, many schools still simply increase their investment in air defense and physical defense. They use the establishment of campus security teams, the elevation of campus walls, and the installation of campus dormitories. The installation of steel guardrails and other measures to prevent the window, apparently these measures have produced a certain effect, but in the form of criminals constantly changing the means of committing crimes, the actual utility is very limited.
At the same time, the surrounding environment of the school perimeter is complex and the security and security work has long been challenged. Judging from the operation of campus perimeter security subsystems, the vast majority of vendors’ perimeter security subsystems are not equipped with mature and stable integrated security management platforms, and cannot be networked with campus video, access control and other subsystems. Reduce the efficiency of the security guards. Campus security needs to be strengthened in advance warning and prevention work. In addition, school physical enclosure design and product selection are not valued, weakening its safety precautions. Blindly selecting some issues that have poor practical experience, unsightly viewing, and inappropriate school perimeter intrusion products have made the first line of defense a limited role as a school perimeter defense.
Second, campus perimeter security needs and application of electronic fence
1. Campus perimeter alarm needs
At present, the perimeter of many schools is relatively large. There are many houses and theft is very easy to conceal. At the same time, the self-control ability of primary and middle school students is relatively poor. They often rush out of schools by turning around walls. Based on these characteristics, the campus is in need of perimeter security applications. The main ones are: First, the equipment is required to have absolute safety, and the degree of injury is zero; second, strict precautions are not taken to prevent blind spots; third, false alarm rate is low, and errors caused by small animals, branches, and bad weather can be effectively prevented. The fourth is to be able to network with security, IT systems, and monitoring and linkage, when there is alarm, the camera turned to the appropriate location to start recording, play real-time monitoring, prevention of risk.
Based on campus campus characteristics and campus environment characteristics, campus perimeter defense equipment has a great advantage, both deterrent and prevent intruders from entering, extending the invasion time function, and the product has a long life cycle, the maintenance process needs to be convenient, so electronic The fence alarm system has become the best perimeter protection equipment for the campus at this stage.
2. Application of electronic fences on campus
(1) Basic structure of electronic fence system
Electronic fence is currently the most advanced perimeter security alarm system, which can be divided into pulsed electronic fence and tension fence. The pulse fence mainly generates alarm through sensing the change of voltage value on the front-end alloy wire. The front fence is equipped with high-voltage pulse power and has very Strong deterrence force; tension fence is to sense the change of the pressure value on the alloy to generate an alarm. Because the security of primary and secondary schools and kindergartens takes into consideration the situation that students may climb over the wall, the front tension fence system is generally used. The tension fence system is mainly composed of front-end detectors, intrusion detection hosts, intelligent control terminals, and security management platforms. Front-end alloy wires, as well as measuring and control rods, bearing rods, and bearing rod equipment can all be sensitive to the intruder's climbing, suggesting intrusion alarms. In addition, the alloy wire can automatically adapt to the environment to adjust the alert tension value according to changes in the external environment, climate, etc., to reduce false positives.
Take Guangtuo's perimeter security use in 35 campuses in Fangshan District of Beijing as an example. The project system follows the principle of comprehensive design. The front end of the electronic fence and the HD camera are installed in the campus perimeter, and the security room is equipped with MK series control terminals to handle the police in time. The SAM200 alarm integrated management platform is installed in the monitoring room to view the scene of the police at real time and operate in conjunction with the campus security subsystem. With advanced and networking capabilities, the school can not only grasp the situation of the child in real time, but also work with the public security bureau of the jurisdiction. The Education Bureau is networked and in the face of unexpected situations, measures can be taken quickly and accurately to ensure the safety of teachers and students in the school.
Campus Intelligence Solution
(2) Significant advantages in using electronic fences on campus
Effective defense: front-end fences are installed on the perimeter wall of the campus and form an insurmountable barrier of 0.8 meters at the perimeter of the campus. The distance between the front-end alloy wires is between 0.15-0.2m, which enhances the intruder's climbing or passing through the wires. The difficulty, while blocking students from jumping out of the room, will not cause unexpected injury to the human body. Warning signs and fences also have a deterrent effect on intruders, effectively reducing intruders’ criminal motivation.
Precautionary: According to the campus perimeter laying, with the access control system, eliminate blind spots, to break the limitations of infrared radiation only for the use of flat rules without shelter, while automatically adapting to outdoor long-term temperature and humidity changes, resistant to harsh environments, etc. The rate of false positives is low.
Intrusion alarm: Really realize the front fence climbing alarm, disconnection alarm, slack alarm and front detection rod tamper alarm, etc. The climbing alarm can also be directly positioned to the position of the rod to achieve accurate positioning of the invading position. It can also accurately identify the intruder's intrusion behavior and accurately distinguish between human and small animal touch.
Multi-system linkage: The electronic fence host forms a multi-level management system through the 485 bus or network and intelligent keyboards and management platform software. It also supports multi-system linkage with the video surveillance system, broadcasting system, electronic patrol, and one-button alarming in this project. To protect the safety of teachers and students in the campus in all aspects.
Multi-level management: The Education Bureau and the Public Security Bureau can monitor the security status of the campus perimeter in real time through the security management platform. When a dangerous situation occurs, the school can send alarm information to the District Education Bureau and the Public Security Bureau through the monitoring center. When the police alarm, it can link the school video to remotely monitor the incident and promptly handle the incident to avoid major safety incidents.
In recent years, video surveillance systems have been popularized in major universities, junior high schools, and kindergartens. However, they only provide functions for checking afterwards. Obviously, they can't meet the basic needs of early warning and warning. The electronic fence system can realize pre-warning functions, and provide alarm systems and warnings. The system is effectively integrated to achieve the purpose of prevention and combination of defense and reporting, highlighting the increasing importance of perimeter electronic fence warning in security systems.
Third, the development trend of perimeter security
The fundamental purpose of perimeter intrusion prevention is to use various advanced sensing technologies to identify illegal intrusions, prevent and prevent the occurrence of malicious incidents, and solve the limitations of traditional air defenses such as time, area, and personnel energy. With the continuous expansion of security applications, the requirements for reliability and false alarm rate of intrusion detection products are getting higher and higher, and electronic fences have made qualitative breakthroughs in technology and function in recent years. From the current technology trends, In the future, its development in the following areas will become more prominent:
1. Intelligent management software technology is a major trend
Although the perimeter alarm industry has developed for many years, there are few peripheral alarm manufacturers that can truly manage the intelligent platform. 90% of the manufacturers are limited by the company's overall technical strength and other reasons, and they are often connected to other manufacturers through the switch. The platform cannot be managed independently and systematically. Based on the current situation of the slow development of the peripheral alarm industry management platform, the technology-leading perimeter alarm enterprise development integrated management platform has become an irresistible responsibility. Based on its own technological advantages, Shanghai Guangtuo has developed for two years and has taken the lead in launching the SAM200 integrated alarm management platform. It can effectively integrate various security subsystem resources, centralize all networked access to alarm and video equipment, and enable pulsed electronic fences. , tension electronic fences, fiber optic intrusion detection systems, leaky cable detection systems, video surveillance systems, burglar alarm systems, and other aspects of highly integrated resources, built a set of traditional intrusion alarms, video surveillance, alarm video composite, electronic maps, alarm Linkage plan and other security services are integrated into one integrated management platform. At present, the platform has been applied in many campuses.
The second is intelligent precision positioning, reducing missed reports and false alarms. The traditional perimeter alarm is based on the zone as a unit for early warning. Once the device alarms, we cannot know exactly where the signal comes from the zone. Over the past few years, with the rapid development of new technologies, the perimeter system has evolved to the point-based unit for precise positioning, excluding the effects of various environmental impacts such as vegetation, rain, snow, hail, sandstorms, wind, and fog. False positives. Accurate positioning of product system alarms on the market has reached 1 meter. In the future, the perimeter alarm products still need to continuously improve their environmental adaptability. In terms of different climate conditions, differences in topography and geomorphology, force majeure natural disasters, and human influence factors, continuous improvement is needed to meet the needs of perimeter applications in more complex situations. .
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