All fiber perimeter monitoring and early warning system core technology and applications (1)

All fiber perimeter monitoring today, terrorist and terrorist activities, the dramatic increase of population movement, social instability, consequently, the national security and defense of the national property of the task and the growing pressure to make the building of a harmonious society in China also face great challenges.

Thus, for national economy unit itself can "security system against destruction, anti intrusion, prevention of accidents" and real-time monitoring and early warning set higher demand and greater challenges, perimeter protection (firewall) as the first line of Defense, whether they are effectively determine whether the maximum speed to find unsafe, minimize no safety factor.

Traditional antivirus solution application characteristic optic security &

Over the years, the traditional optic security & anti solution (infrared correlation programme, video surveillance programme, microwave barrier, leakage cable programmes, vibration cable programmes, electronic fences, power grids, etc) to guarantee social peace made due contributions, but some objective technical conditions and other factors, there are some similarities or personality, as follows:

Infrared and other traditional programmes, protection grade is lower, for intentional intrusion, easily span or avoidance; at the same time vulnerable to terrain conditions of high and low, twists, turning, bend, environmental restrictions, and they are not suitable for the harsh climate, vulnerable to high temperature, low temperature, light, dust, rain, snow, fog and frost effect of natural climate, high rate of false positives;

Disclosure of cable and cable cable alarm belongs to vibration sensing, sensor part is active, the system power consumption is very big; electronic fence, power grids and other programmes also have certain hazards.

These programmes can be monitored from a relatively short, units of distance, the high cost of long distance and the need for monitoring, system cost prohibitive. And the sensor unit of short-lived, long continuous use, maintenance costs are high;

There are more opportunities for interference (electromagnetic interference, signal interference, cross-talk, etc), the sensitivity drops, false positives, false negatives rates, etc.;

For large scale monitoring, more traditional programme itself is not positioned function, intrusions, cannot be located.

This means that you cannot promptly and accurately identify dangerous locations, failed to take timely measures to prevent intrusions suppression results in the core area of compromised, is destroyed.

Visible on top, based on the sensor technology of traditional antivirus solutions are supported by their own optic security & technology constraints exist many defects, and the new era of optic security & control system to be able to identify various intrusion incident response in a timely manner and shall have the long-distance monitoring, high-precision positioning function, low energy dependence and high environmental resistance, resistance to electromagnetic interference, and other corrosion-resistant characteristics.

Advantages of optical fiber sensor

And compared to the traditional electric sensors, fiber-optic sensors in sensor network applications that have very obvious technical benefits

Small size, light weight, with a very good reliability and stability;

Passive systems, energy dependency, significant savings in power supply equipment and wiring costs for long distance;

EMI, corrosion resistant, completely from the effects of lightning, bad chemical environment, outdoor environment and strong electromagnetic interference, etc;

No radiation, non flammable or explosive materials, waterproof, and environmental protection.

All fiber perimeter monitoring and early warning system

All fiber perimeter monitoring and early warning system is the use of laser, fibre sensors and optical communication and other high-tech technology to build the security alarm system, is a threat to public safety emergency monitoring and alerting of modern defensive system, which is based on distributed optical sensor technology applied to the perimeter monitoring protection of the new system.

The system uses a single optical fiber (cable) as the sensing device to transfer two in one, by directly touching the optical fiber (cable) or through the host, such as casing, barbed wire, fencing, piping, etc., is passed to the fiber (cable) of various disturbances, continuous and real-time monitoring.

Acquisition of disturbance data, after a back-end analysis of handling and intelligent recognition, figure out different external interference types, such as climbing fences, barbed wire, apply pressure to stop running or walking zones, as well as the possible threat to the perimeter of the building's mechanical construction, etc., implement system warning or real-time alarms, so as to achieve maximum security against exploits regional perimeter threats early warning monitoring behavior. In order to precisely position, just get the exact length of optical fiber, the situation will be converted into the fibre length distance, the actual distance in alarm information is accurate and reliable positioning accuracy, enabling remote security system with alarm function, the system provides the location of the intrusion, CCTV surveillance, or possible linkage to dispatch personnel arrived at the scene.

Core technology

As a special belt positioning function in distributed fiber sensing surveillance monitoring technology, the required components, parts, the entire system of localization of all implementation and application of relatively simple, and compared to other traditional security systems, advanced is that:

Combinations of Lightpath design, single fiber fusion outside intrusion detection and localization in one;

Pattern recognition system to reduce system false positives;

Signal processing system, the high risk areas for voice to listen and record;

Unique system architecture, integration of other sensor monitoring system.

Core features

1. long-distance intrusion monitoring

The whole area along the fiber laying any point on the 24/7 uninterrupted real-time monitoring.

2. invasive localization

In judging the threatening invasion behavior occurs, the system based on the optical signal modulation analysis, real-time intrusion occurs point to locate, which makes it easier for security personnel on targeted timely to take effective measures to stop intrusions follow-up event occurs.

3, pattern recognition

On non-harmful environmental interference as Thunder, firecrackers, car sound, the sound of rain, etc., to identify and make environmentally sound judgment; can also identify walking, climbing, touch, mining, and other intrusions and alarm.

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