The touch-net bypass alarm technology is the two deadly technical difficulties that have always existed in the past century when electronic fences were introduced into the inland market from abroad. In the face of growing market demand, the voice of users of electronic fences has come to the fore. Then, how is the predicament of the electronic fence manufacturers broken? Looking at the status of the electronic fence technology research and development, we can understand in depth why the touch screen anti-bypass technology plagued most companies.
What is anti-bypass technology?
“Touch net†alarm technology is a detection technology that detects human body's touch behavior. Popularly speaking, it is the human body that touches the police. The technology was first applied to high-precision places in the judicial department to detect the escape behavior of criminals with high sensitivity. The country has invested a large number of electronic science and technology forces to overcome the "touch network" alarm technology bottleneck, in order to prevent the technology to achieve more accurate human detection capabilities.
In physics, "bypass" is different from the main circuit, which means that when the function is needed, it can be switched to another circuit without affecting the normal operation of the load. In the security alarm system, "bypass" technology is used. It is to prevent the electronic fence from being bypassed by the intruder to bypass the alloy wire and cause pulsed electricity to pass through the bypass wire, resulting in no alarm.
Ingenious technical iterations do not have shortcuts
The principle of anti-bypass network technology seems simple, but in the industry, the technical difficulties have a long history. Regarding the user's questioning, all companies are secretive, avoiding light and avoiding even more. Currently, there are many alarm manufacturers that advertise on the market with “touch nets†as a single concept. There are few manufacturers that can truly achieve “touch net†and “anti-bypassâ€.
For most of the electronic enclosures, the so-called "touch net" alarm function is embodied in that when one end of the metal cable is connected to a single electronic fence metal conductor, and the other end of the metal cable is grounded, an alarm signal may be generated. From the implementation technology point of view, due to the limitation of core technology, a single touch alarm product can only be connected to the grounding resistance of the front electronic fence in series to temporarily realize the grounding alarm at one end of the wire at one end of the wire touch screen. It does not recognize the full coverage of all touches in the true sense. "Net" form of intrusion, usually we call it "pseudo touch net" alarm.
In addition to achieving touch screen alarm mode, functional stability and reliability are worthy of consideration. Specifically, when an intruder wears sneakers or wears plastic gloves to climb the fence with a single-line net, the resulting resistance is large and still does not Alarms, there are many similar problems. For products that truly solve the touch screen from technical principles, taking the T6/T8 series pulsed electronic fence as an example, it is possible to realize that there is no need to add extra resistances between the front-end alloy wires. Even a human body or metal wire single-wire touch net can trigger an alarm.
"Bypass-bypass" alarm technology is to realize the bypass alarm of two adjacent lines. Take the example of the six-wire pulsed electronic fence. Positive and negative poles generally form two loops. The general manufacturer can only recognize the adjacent two lines. Road alarm, then the problem arises, if the intruder bypasses the line on a line equipotential cross-boundary, or connected to the alloy wire is not adjacent or not on the same circuit, the host does not generate an alarm, the drawbacks .
In addition to the above problems, there are also different problems arising from the bypass crossover behavior. Bypass bypass behavior can be divided into equipotential bypass (Figure 1) and loop bypass bridging (Figure 2), when the intruder connects the two ends of each metal wire at the front end of the electronic fence with a short-circuit line (single-line bypass cross Connected), or use two (four) short-circuit wires to connect the separated metal wires at the bridging network wiring jumper (circuit bypass bypass). The electronic fence front end generates a failure zone and the host does not call the police.
The fifth generation of electronic fences is coming
Pulsed electronic fence is one of the most advanced intrusion detection perimeter alarm systems. The introduction of touch-net-bypass-type pulse electronic fence officially opened the fifth generation of electronic fence era.
T6/T8 touch-net bypass anti-bypass pulsed electronic fence adopts Smart DEC intelligent algorithm (anti-isopotential cracking technology), which can accurately determine the front-end fence by sensing the changes in the metal wire on the front-end fence and through a series of precise calculations. Touch network situation. Intelligent DEC intelligent algorithm installed in the host computer, new single-wire touch network alarm, anti-bypass alarm function, to achieve all the market's requirements for intrusion alarm pulse electronic fence: single-wire touch network alarm, anti-bypass alarm, short circuit alarm and Break alarm four alarm methods.
In addition, T6/T8 can also be used to determine whether the human body touches or small animals and other natural disturbances by calculating the amount of change in the electromagnetic field on the fence metal wire and send an alarm signal to the control center for human intrusion to greatly reduce the electronic fence products. The false positive rate.
At the same time, when an intruder uses a short-circuit method to connect the front end fence, once the electromagnetic field balance on the fence metal line is destroyed, the Smart DEC intelligent algorithm will accurately detect the intruder's bypass crossover behavior by monitoring the electromagnetic field balance fluctuations. (Including single-wire bypass bridge and loop bypass bridge), and immediately send alarm information back to the control center, providing security officers with excellent time advantage.
With the deepening of the security of the Internet of Things, and the in-depth application of new technologies such as cloud computing, big data, and deep learning, in the era of intelligence, security vendors will carry more challenges and opportunities. The technical innovation represented by the T6/T8 touch-net anti-bypass pulsed electronic fence quickly breaks through industry barriers, improves the safety factor of the electronic fence in an all-round way, and seizing the market's commanding height with its unique technological advantage is always the king of security companies' survival.
Text / Shanghai Guangtuo Information Technology Co., Ltd. Hu Caixia
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