Abstract 

"Protection of objects against unapproved access with application of the hidden systems of detection"

1. Introduction;
2. Goal and tasks of the research;
3. Theme urgency;
4. Underground fiber – optic system;
5. Conclusion;
6. References.

Introduction

Protection of objects that have a large perimeter, it is a difficult task. Protection of large objects needs to attract a significant amount of expensive equipment and personnel protection. Therefore, high – quality perimeter protection against the penetration of an object attacker can significantly reduce the cost of protection.

Hidden means of detecting the protection of the perimeter are the first turn. The main function of the first turn is an early warning service of the attacker's intention to cross the perimeter. Perimeter security service provides an opportunity to mobilize their forces before the fact of penetration. The use of hidden detection systems do not allow an attacker to identify the zone of detection and reduces the likelihood of crossing the perimeter.

Goal and tasks of the research

Need to develop a means of detecting a physical invasion of the object. This tool should be invisible to the attacker and all means of intelligence.

To achieve this goal should address the following tasks:

1. Consider all possible ways and means of protection of the perimeter of the object;
2.  Select the tool, the most satisfying our conditions;
3. Develop a model of the means underground detection;
4. To investigate the characteristics and parameters of the model.

The object of the research – properties and parameters of optical radiation in different environments.

Object of research – principles and properties of underground fiber-optic intrusion detection systems.

Theme urgency 

Today, no one tool safety cannot be considered totally effective. Because the attacker may know of a means of protection, the principle of work and his place of installation of safety equipment, the probability of a deceit of the security equipment increases.

The situation is complicated because of the technological implications of industrial development. Heavy the electromagnetic environment or the presence of approximately object highways and Railway limits the application of many intrusion systems. Large area of the object requires a significant investment to protect. Sometimes means of protection of perimeter can not be applied, because of absence of an electric feed.

Consequently, there was an urgent need to develop means of protection, which can operate in a hostile industrial environment; it should be hidden from the various means of intelligence.

Underground fiber – optic system

Fig. 1 Variation of parameters of radiation as a result of mechanical influence on the fiber – optic sensor (Animation: volume – 96,4 кБ; the size – 365х108; quantity of the frames – 9; quantity of cycles of recurrence –7)

    Fiber – optic sensors are becoming a priority in the perimeter security systems. This is because fiber-optic sensors are the only type of sensors that meet all the requirements.

Methods of registration of signals of invasion:

    In the fiber – optic sensors using the following methods for the detection of signals invasion:

Conclusion

  Systems with underground fiber – optic sensors allow you to guard the territory to 100 km with the precision of localization places the invasion up to several meters. Installation of such systems involves a number of measures for system planning and installation of sensors. Sensor cables are laid in a trench, covered with gravel. Installation of sensor controls directly in a ground reduces a zone of sensitivity of a sensor. These sensors record the lateral pressure on the fiber, which resulted in changing the characteristics of the radiation. For example, the person in weight of 70 kg and growth of 180 sm puts pressure upon a ground from 19 кPа up to 10 кPа, that causes an additional temporary delay of propagation of an impulse nearby 600 ps. And if a person crawls, the pressure is 1 – 1.5 kPa, which causes a time delay of approximately 170 ps. The resolution of the entire system is 50 – 70. Knowing similar parameters, may conduct self-training system to avoid false operations.

  References

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Important note




Master's thesis is not completed yet, while writing this author's abstract. Final Completion: December 2012 Full text of the work and materials on the subject can be obtained from the author or his manager after that date.