RU2645617C1 - Method of security monitoring of the track with the application of the passive optical-electronic detector - Google Patents

Abstract

FIELD: monitoring systems.

SUBSTANCE: invention relates to security monitoring methods and can be used in cases of using a single passive optoelectronic detectors for alarm control of tracks passing through the terrain with high vegetation or with other conditions hampering the deployment of detectors outside the track. Method consists in controlling the bending of the track by one detector deployed in such a way that it is located on the outside of the angle of the bend of the track at a distance of 1–2 meters from it; in orientating the detector so that a section of its detection zone with a length of more than 10 meters and a width of at least 0.2 meters is above the track; recording a desired detector signal for the entire time its operation in alarm mode; application of the algorithm for determining the direction of the intruder's movement relative to the detector by the nature of the change in the level of the desired signal: level of the desired signal increased – the intruder moved toward the detector; the level of the desired signal decreased – the intruder moved away from the detector; detector transmits a signal about the direction of the intruder's movement to the information collecting and processing system. Method includes a preparatory stage with deployment of the detector according to a developed scheme on the bend of the track, and the main stage which begins with the detection of the intruder and ends with the formation of an output about the direction of the intruder's movement through the bend of the track.

EFFECT: technical result consists in obtaining the possibility of determining the direction of motion of the detected intruder using only one detector.

1 cl, 5 dwg

Description

The invention relates to security monitoring methods and can be used in cases where one passive optical-electronic detection (CO) device is used for signaling control of trails passing through terrain with high vegetation or with other conditions that make it difficult to deploy CO outside the road.

As a rule, the route of the intruder's movement on the ground goes along the existing network of paths and roads. Knowledge of the direction of movement of the intruder by the reaction forces is of great importance, since it allows you to narrow the direction of his search and thereby increase the likelihood of his detection and detention [1]. Therefore, considerable attention is paid to the signal cover of the network of paths and roads. For this task, passive optoelectronic detection tools with a long detection zone (AO) of up to 50 meters are widely used.

There is a method of security monitoring, which consists in monitoring the path with one CO, in ensuring the registration of a system for collecting and processing information (MTR) of alarms from the CO when the intruder crosses its AE (Fig. 1). [2, 3]

There is another method of security monitoring, which consists in monitoring the path with two COs, in ensuring the registration of the SSOI of alarm signals from CO when the intruder crosses their AO, using an algorithm for determining the direction of movement of the detected intruder based on the analysis of the sequence of receipt of alarm signals from CO (Fig. 2). [2, 3]

The disadvantage of the first specified method of security monitoring is the inability to determine the direction of movement of the detected intruder.

The second specified method of security monitoring has the ability to determine the direction of movement of the intruder, however, for its implementation it is necessary to deploy two RMs.

The aim of the invention is to obtain the ability to determine the direction of movement of the detected intruder using only one WITH.

As a rule, a trail passing through a site is not absolutely straight, one of its most common elements is the bend of the trail (an arc-shaped turn, the curvature of the trail - consisting of two adjacent straight sections of the trail connected by a circular curve). [four]

To achieve this goal, a method for security monitoring of the trail using a passive optical-electronic detection tool has been developed, which consists in monitoring the bend of the trail with one SS deployed so that it is located on the outside of the bend angle of the trail at a distance of 1-2 meters from it; orienting the SO so that the section of its detection zone is more than 10 meters long and at least 0.2 meters wide is located above the path; recording the useful signal of CO during the entire time it is in alarm mode; the application of the algorithm for determining the direction of movement of the intruder relative to the CO by the nature of the change in the level of the useful signal: the level of the useful signal increased - the intruder moved in the direction of the CO; the level of the useful signal decreased - the intruder moved away from the CO; CO is transmitted to the information collection and processing system a signal about the direction of movement of the intruder (Fig. 3).

It is known that the principle of operation of passive optoelectronic detection means is based on the registration of signals generated by the heat flux emitted by the detection object (intruder). [5]

The useful signal at the output of the pyrodetector of a passive optoelectronic detection means is determined [5]:

where S (t) is the level of the useful signal, V;

S _U - volt sensitivity of the pyrodetector CO, B;

ΔФ (t) - change in the magnitude of the heat flux incident on the input window of the optical system caused by the movement of the intruder in the detection zone, W / m ² .

In turn, the maximum value of the heat flux from the intruder is determined by:

where ΔF is the maximum value of the heat flux from the intruder, W / m ² ;

N - distance from CO to the intruder, m;

S _BX - the area of the input window of the optical system WITH, m ² ;

S _H - the area of the projection of the intruder on a plane perpendicular to the direction of observation of CO, m ² ;

L _H - the brightness of the intruder, cd / m ² ;

L _F - background brightness in cd / m ^2.

That is, the signal at the output of the CO pyrodetector, ceteris paribus, the greater, the greater the degree of overlap by the intruder ZO and the smaller the distance to the CO itself [5]. The shape of the CO is conical, its width a few meters from the CO (F) is tenths of a meter closer to the end of the zone (F ') - more than a meter (Fig. 4). Considering that the width of the human body (intruder) is more than 0.3 m, as well as formulas 2 and 3 and the proposed scheme for deploying CO at the bend of the path, the level of the useful signal when the intruder moves through the AO along its axis will not be constant. The level of the useful signal will increase when approaching the CO and vice versa - when the intruder moves away from the CO, the level of the useful signal will decrease. In the area of the GZ with a length of 10 meters or more this dependence is reliably recorded by CO.

Taking into account the proposed deployment scheme of CO, by the nature of the change in the level of the useful signal, we can conclude about the direction of movement of the intruder:

- if the level of the useful signal increased during the duration of the alarm mode, the intruder moved towards the detection means (direction of VA) (Fig. 3):

where S _MIN is the minimum level of the useful signal recorded by CO during the entire duration of the alarm mode, V;

S _MAX - the maximum level of the useful signal recorded by the CO during the entire duration of the alarm mode, V.

- if the level of the useful signal decreased during the duration of the alarm, the intruder moved away from the detection means (direction AB) (Fig. 3):

Information about the direction of movement of the intruder (the intruder moves toward the CO or the intruder moves away from the CO) is transmitted to the CO system for collecting and processing information over the air.

The method of security monitoring of the trail includes two stages: preparatory and main. Preparatory stage:

1. The deployment on the ground of the system 1 for collecting and processing information (Fig. 6).

2. Deployment on the bend of the trail according to the established scheme of passive optoelectronic detection means, which includes: optical system 2, pyrodetector 3, amplifier 4, alarm driver 5, alarm interface 6, memory device 7, decision device 8 (Fig. 3 , 5).

The main stage begins when the intruder moves through the bend of the path and gets into the AO CO, it includes:

1. Focusing the infrared electromagnetic radiation from the intruder using the optical system 2 to the pyrodetector 3. Signal generation by the pyrodetector 3, amplification of the signal by amplifier 4, and signal input to the shaper 5 of the alarm signals.

2. The beginning of the formation of an alarm by the shaper 5 alarms (Fig. 5).

3. Transmission via interface 6 to the alarm system 1 of collecting and processing alarm information (Fig. 5).

4. The transmission of the control command of the shaper 5 of the alarm device 7 memory at the beginning of the memorization of the level of the useful signal from the pyroelectric receiver 3 (Fig. 5).

5. The beginning of the memorization of the level of the useful signal by the device 7 memory (Fig. 6).

6. The intruder’s exit from the defense industry. The termination of the formation of an alarm by the shaper 5 alarms (Fig. 5).

7. The end of the formation of the alarm by the shaper 5 alarms (Fig. 5).

8. Transmission of the control command by the shaper 5 of the alarm signal to the memory device 7 at the end of storing the signal level from the pyroelectric receiver 3 (Fig. 5).

9. Determining the nature of the change in the level of the useful signal by the device 8, decisive: the level of the useful signal increased or the level of the useful signal decreased (Fig. 5).

10. The definition of the device 8, deciding the direction of movement of the intruder:

- if the level of the useful signal increased during the duration of the alarm mode, the intruder moved towards the detection means (Fig. 3), (formula 3);

- if the level of the useful signal decreased during the duration of the alarm, the intruder moved away from the detection means (Fig. 3), (formula 4).

11. Transmission by a passive optical-electronic means of detection to the system 1 for collecting and processing information on the direction of movement of the intruder through the signaling interface 6 via the radio channel (Fig. 5).

12. Zeroing the memory of the memory device 7 (Fig. 5).

The invention is illustrated graphic materials, which are presented on:

- FIG. 1 is a deployment diagram of one passive optical-electronic detection means in a known security monitoring method;

- FIG. 2 is a deployment diagram of two passive optoelectronic detection means in a known security monitoring method;

- FIG. 3 is a deployment diagram of a passive optoelectronic detection means in the proposed security monitoring method with size indication;

- FIG. 4 is a diagram of a detection zone of a passive optoelectronic detection means indicating dimensions (top view);

- FIG. 5 is a structural diagram of the relationship of the devices used when implementing the security monitoring method.

The technical result consists in obtaining the ability to determine the direction of movement of the detected intruder using only one WITH.

Information sources

1. Shumov, V.V. The use of mathematical methods and models to substantiate decisions on the protection of the state border: Scientific and practical manual. - Part 2. - M .: Education, 1996. - 196 p.

2. Korshnyakov, V.G. Signaling means of protection of local areas: uc. allowance / V.G. Korshnyakov - Kaliningrad: KPI of the FSB of the Russian Federation, 2004 .-- 135 p.

3. Marshalov, T.A. Technical means of border protection: textbook / T.A. Marshalov, A.V. Gustov, I.M. Potapov. - Kaliningrad: KPI of the FSB of the Russian Federation, 2009 .-- 568 p.

4. Psarev, A.A. Military Topography: Textbook. - M .: Military Publishing House, 1986 .-- 384 p.

5. Magauenov, R.G. Burglar alarm systems: the basics of theory and construction principles: study. allowance / R.G. Magauenov - M .: Hot - Telecom, 2004 .-- 367 p.

6. Balenko, S.V. Survival School. - M .: 1994. - 140 p.

Claims (1)

A method for security monitoring of a path using passive optoelectronic detection means, which consists in monitoring the bending of the path with one passive optoelectronic detection means; in ensuring registration by a system for collecting and processing information of signals from the detection means, characterized in that the detection means is installed on the outside of the bend angle of the path at a distance of 1-2 meters from it; the detection means is oriented so that a portion of its detection zone with a length of more than 10 meters and a width of at least 0.2 meters is above the path; the useful signal is recorded by the detection tool during the entire time it is in alarm mode; an algorithm is used to determine the direction of movement of the intruder relative to the detection means by the nature of the change in the level of the useful signal: the level of the useful signal increased - the intruder moved towards the detection means; the level of the useful signal decreased - the intruder moved away from the detection means; the detection means transmits to the information collection and processing system a signal on the direction of movement of the intruder.

Images