The status quo of school safety and security work
How to choose the use of electronic fences in schools and kindergartens: This paper analyzes and discusses the problems of how to choose the use of electronic fences in schools and kindergartens. The electronic fence is the solution to the problems.
I. Introduction
At present, in order to strengthen the safety precautions of schools and kindergartens, it is necessary to take civil air defense (strengthening personnel training, increasing staffing, improving door guards, patrolling, duty, etc.) and technical defense (increasing security equipment, such as: school entrances and exits, perimeters) The important parts should be installed with technical defense facilities. As a tangible anti-intrusion device on the perimeter, the electronic fence is widely used in many occasions because of its deterrent, tangible and intelligent advantages.
Second, schools, kindergartens should consider the factors of electronic fence:
Schools and kindergartens should choose electronic fences. We must consider the characteristics of schools, kindergartens and electronic fences to find out their compatibility points for evaluation.
First, for the characteristics of schools and kindergartens, the choice of electronic fences should be considered from the following aspects:
1. First of all, put the personal safety considerations of teachers and students in schools and kindergartens first;
2, should fully consider the naughty factors of young children, students, even if the human body accidentally touch the fence can not cause direct and indirect personal injury and other adverse consequences;
3. Considering the electromagnetic environment of the protection school and kindergarten, the selected electronic fence should not affect the surrounding electromagnetic environment during operation;
4. The electronic fence should be able to display and alarm instantly in the control center, and record information such as intrusion, fault, damage, and alarm location in real time, and have the function of networking with the regional public an department;
5, the electronic fence should be easy to use, easy to learn, no special requirements for users.
At present, whether it is an ordinary college or a small and medium-sized school, the status quo of campus security is not optimistic. It is basically in a situation where civil air defense and air defense are the mainstay, and technical defense is still in its infancy. The school continues to increase investment in civil air defense and air defense. For example, the school security guards are added, the school organizes the school guards, the walls are raised, and the steel fences are installed on the windows of the student dormitory. These measures have produced certain effects, but there are also some drawbacks. For example, the school guards will bring about continuous expenditures, and the installation of steel bars in the dormitory does not meet the fire protection requirements.
Campus security consists mainly of two parts:
One is the teaching office area, and the other is the area where students study and live. At present, most primary and secondary schools have closed management, but primary and secondary school students have relatively poor self-control and weak self-protection. Therefore, from the perspective of the environment, campus security has the characteristics of many monitoring points and large monitoring area.
School safety and security work features:
1. The school has a large perimeter and many houses. It is easy for the thief to hide.
2. Primary and secondary school students have relatively poor self-control ability and often sneak out of school by turning over the wall. 3. Perimeter monitoring equipment is expensive and difficult to use on a large scale.
Advantages of the application of the passenger-European X6 tension electronic fence in schools:
1. Deterrent function: The warning sign of the pulse fence gives the criminals a great psychological deterrent effect, avoids the execution of the Zui behavior, and can prevent the students from attempting to go outside the school by crossing the fence.
2. Precautions and strict no dead ends: It can be erected according to the terrain, without dead angles, eliminating security blind spots.
3. Low false positive rate: It can effectively prevent false alarms caused by small animals, branches, bad weather, etc.
4. Can be connected with security and IT systems: it can be linked with monitoring. When the alarm occurs, the camera will turn to the corresponding position to start recording; it can also be well integrated into the IT system.
5. The software can realize remote operation and convenient management: the distance from the fence to the command center is very long, so remote control is required, such as remote opening and shutdown.
Fluorocrystalline mica, also known as Fluorphlogopite Mica, synthetic mica, artificial mica, synthetic mica crystal, belongs to the silicate type artificial mica crystal, is under the high temperature condition of 1500°C, through strict process conditions and material ratio, in platinum The mica crystals smelted in the yttrium have a chemical formula of KMg3(AISi3O10)F2(OH)-, and do not contain (OH)-. The (OH)-hydroxyl group is replaced by F-(fluoro), which is similar to the fluorite mica. Materials commonly used in the general industry are natural mica. Natural mica is an underground ore naturally formed and belongs to the class of silicates. Most of the industrial mica used is phlogopite (brown) and muscovite. Its ideal chemical formula is KAI2(AISi3O10)(OH)2. OH)-(Hydroxy), due to the presence of hydroxyl (water molecules), its performance in all aspects is far lower than that of fluorocrystalline mica.
The main characteristics of fluoride crystal mica:
1, high temperature: can work long-term in the 1100 °C environment.
The testing department of the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences (nationally recognized testing institute) tested the thermal weight loss of 8% at 1100°C for 48 hours, and the melting and devitrification temperature was 1375°C.
2. Electrical insulation: The volume resistivity is 10 times higher than natural mica. Electrical breakdown strength is PTFE
Lean 10 times.
3, hot and cold blasting stability is very good
5 cycles of -40°C~70°C at the 5th Saibao Lab of the Ministry of Information Industry
Inspection, all qualified.
4, anti-corrosion:
Fluorophlogopite does not react with acid and alkali solutions, and does not react with water. Under the long-term (2 to 3 years) scouring of high-temperature and high-pressure water (including acid and alkali), the original clarity and transparency can still be maintained.
5, high frequency performance:
The dielectric constant of fluorite mica is 4.6 ε, and the dielectric loss is (1~4)×10 −4 tg δ, and the dielectric loss is very low. And because of the pure texture, all parameters are extremely stable.
6, optical properties
Since the fluorite mica contains less impurities, its light transmittance is compared from infrared to ultraviolet.
High, the transmittance is close to 100%.
7, Mosaic (Mosaicity):
The Mosaicite of fluorocrystalline mica is less than 0.25 degrees, which was produced in the experiment.
The neutron flame is not high enough to absorb multi-band light beams and is an ideal neutron monochromator test material.
8, vacuum deflation performance:
The evaporative volume of fluorite mica is low, and it is measured with a mass spectrometer and the trace gas released is only
O2, N2, Ar and other adsorbed gases. Since the H2O vapor is not released, this is extremely valuable for use as an electrical vacuum insulation material, which can greatly increase the service life of the vacuum device.
9, excellent physical properties:
Fluorocrystalline mica has atomicity flatness, transparency, separability and elasticity, not aging
It is not brittle and so on.
Due to the high temperature resistance, corrosion resistance, low frequency loss, and high bulk resistivity
Absorb multi-band light beam, excellent light transmittance and other advantages. Therefore it has become an ideal new material in the high-end area.
Fluorocrystalline mica Available in:
In the range of 180mm×53mm or ∮76mm, it can be processed into various shapes according to user requirements. Thickness within the range of 0.02mm~1.0mm can be allocated according to user requirements. The conventional thickness is 0.04~0.2mm.
Fluorine crystal (fluorphlogopite, artificial mica) mica film for observation window of high pressure boiler water level gauge in thermal power plant
Fluorphlogopite Mica
Fluorophlogopite Mica,Fluorophlogopite Sheet,Synthetic Fluorophlogopite Mica,Fluorophlogopite Mica Fragments
Changchun City Taiyuan FluorphlogopiteCo. Ltd. , https://www.micaslice.com