RU2617575C1 - Method of security monitoring - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention can be used in cases of using a single radio wave line detection means (DM) for signaling control of the bend of the road. The method consists in controlling the bending of the road by one DM deployed on the bend of the road, taking into account the extension of the detection zone (DZ) closer to the middle of its axis, so that its DZ crosses the road in two places for which the width of the larger portion of the detection zone exceeded the width less than three times; the distance along the road between these crossing points exceeded by one and a half times the distance traveled by the intruder with the maximum possible speed for this section of the road for the time required for the DM to switch from alarm to standby mode after the violator left the DZ; sequential issuance of two alarm signals for the movement of the intruder through the bend of the road and the intersection of the DZ DM; application of the algorithm that determines the direction of the violator's movement, by the value of the ratio of the duration of the first alarm signal to the duration of the second alarm signal that arrived at a set interval of time, depending on the distance between the intersections of the DZ DM with the road and the minimum possible speed of the violator's movement for this section of the road. The method includes a preparatory stage with the development of the DM on the bend of the road and the main stage that begins with the detection of the offender and ends with the formation of an output about the direction of the violator's movement through the bend of the road.

EFFECT: obtaining the possibility of determining the direction of the violator's movement detected on the bend of the road, using only one DM.

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Description

The invention relates to methods for security monitoring of the terrain and can be used in cases of using a radio wave linear means of detection (CO) for the signal cover of a bend of the road.

Often the route of the intruder on the ground passes through the existing road network. Knowledge of the response forces, the direction of movement of the offender is of great importance, since it allows you to narrow the direction of his search and increases the likelihood of his detection and detention [1]. Therefore, significant attention is paid to the signal cover of the road network. One of the most common elements of the road network is the bend of the road (an arched turn, curvature of the road - consisting of two adjacent straight sections of the road connected by a circular curve) [2, 3].

In practice, for signaling cover of sections of the road network, radio wave linear means of detection are widely used, characterized by a significant length of the detection zone (ZO) - from 50 to 500 m [4, 5].

There is a method of security monitoring to cover the bend of the road, consisting in the deployment of one SO, so that its AO crosses the bend of the road, in issuing an alarm when the intruder crosses its AO and forming a conclusion about the detection of the offender (Fig. 1).

There is another method of security monitoring to cover the bend of the road, consisting in the deployment of two SSs, so that the AO of each JI crosses the bend, in the sequential issuing of two alarms - one each of the JI, when the intruder crosses their AO, in fixing the sequence of receipt of two alarms from the CO and the application of the algorithm for determining the direction of movement of the detected intruder based on the analysis of the sequence of receipt of alarm signals from two CO (Fig. 2).

The disadvantage of the first specified method is the inability to determine the direction of movement of the detected intruder moving through a bend of the road.

The second specified method has the ability to determine the direction of movement of the intruder moving through the bend of the road, however, its implementation requires the deployment of two CO.

The aim of the invention is to obtain the ability to determine the direction of movement of the intruder, found on the bend of the road, using only one WITH.

To achieve this goal, a security monitoring method has been developed, which consists in monitoring the bend of the road with one SO deployed on the bend of the road, taking into account the extension of the AU closer to the middle of its axis, so that its AO crosses the road in two places for which the width of the larger sections of the zone detection exceeded the width of the smallest of the areas at least three times; the distance along the road between these crossing points exceeded one and a half times the distance traveled by the intruder at the maximum possible speed for a given section of the road during the time necessary for the CO to switch from the alarm mode to the standby mode after the intruder exited the AU; sequentially issuing WITH two alarm signals when the intruder moves through a bend in the road and crossing the AO WITH; applying an algorithm that determines the direction of movement of the intruder by the value of the ratio of the duration of the first alarm to the duration of the second alarm, received over a specified time interval, depending on the distance between the intersections of the roadside with the road and the minimum possible speed of the intruder for this section of the road (Fig. 3 )

The shape of the AO of the considered linear radio wave detection means is an ellipsoid of rotation and, as a result, its width along the axis is different: the maximum in the middle of the AO (N) and the minimum (N ') near the transmitter (Rx) and receiver (Rx) (Fig. 3, 4) [4, 5].

where H is the width of the GW WITH in the middle, m;

N '- the width of the GW WITH at a distance of 5 m from the Tx (Rx), m

From this it follows that the time spent by the CO in the alarm mode will depend on the place where the intruder crosses the AO, i.e. the wider the area of the AO that the intruder crosses, the longer the duration of the alarm generated by the CO.

where t _N - the duration of the alarm when the intruder crosses the DZ WITH in the middle, s;

t _{H '} is the duration of the alarm when the intruder crosses the DZ CO near the Rx (Rx), s;

V is the speed of the intruder, m / s.

и по величине отношения между собой длительностей этих сигналов тревог можно сделать вывод о направлении движения нарушителя.If the intruder moves through the bend of the road, in any of the two possible directions AB or VA, then two alarm signals with durations (t _H ) and

and according to the magnitude of the relationship between the durations of these alarms, we can conclude about the direction of movement of the intruder.

So, when the intruder moves in the direction of AB, he will first cross a narrow section of the AO, then wide (Fig. 3):

that is, the ratio of the duration of the first alarm will be less than the duration of the second alarm (Fig. 5):

where t ₁ , t ₂ - the duration of the first and second alarm generated by CO, respectively, s.

When the intruder moves in the direction of VA, he will first cross a wide section of the AO, then a narrow one (Fig. 3):

that is, the ratio of the duration of the first alarm will be longer than the duration of the second alarm (Fig. 5):

The uneven speed of the offender through the bend of the road can reduce the likelihood of a correct conclusion about the direction of movement of the offender. A walking intruder moves at a speed, the limits of which depend on the terrain conditions, are practically determined, known and confirmed on the basis of experimental studies [6]. The upper limit of the speed of the intruder does not exceed the lower one by more than one and a half times (Fig. 6).

where V _MAX - the maximum speed of the offender through the bend of the road, m / s;

V _MIN - the minimum speed of the intruder through the bend of the road, m / s.

In order to guarantee the elimination of an error in the conclusion about the direction of movement of the intruder, due to the uneven speed of movement, it is necessary to fulfill the conditions for the deployment of SO, in which the maximum width of the crossroads crossing the bend of the road is greater than the minimum width of the crossroads crossing the bend of the road in another place, not less than three times (Fig. 3).

Then, if the intruder crosses the section with the maximum width of the CZ at the highest speed, and the section with the minimum width of the CZ at the lowest speed, then taking into account the expressions (formulas 7 and 8), the value of the duration of the alarm generated by the CO in the first case will still exceed the duration of the alarm in the second case, at least twice.

In order for two separate alarms to come from CO when an intruder moves through a bend in the road, it is necessary that the time taken by the intruder to overcome the distance between the intersections of the AU WITH the road (A'B ') with a maximum speed (V _MIN ) after it leaves the AO in the place of the first suppression with the road, it was one and a half times the time of the transition of the CO from the alarm mode to the standby mode (Fig. 3):

where t _DR is the transition time to standby mode WITH, sec.

The intruder can move both through the bend of the road, crossing successively two places of restraint with AO CO (two alarms), and having passed only one of the places where the AO CO intersects with the road, get off the bend of the road to the side (one alarm), therefore, it is necessary to determine the maximum waiting time for the second signal. It depends on the distance (A'B ') that the intruder can go through the bend of the road in a given direction from the first to the second intersection of the roadside with the road and the lowest possible speed in this section of the road:

where T is the maximum value of the estimated time interval of accumulation of incoming signals, s.

The coefficient 1.2 is taken to exclude the conclusion error, possible due to inaccuracies in determining the speed of the offender.

In the proposed deployment scheme, the following sizes are also maintained (Fig. 3):

- the removal of places of suppression of the axis of the roadside with the road (points A 'and B') from the bend point (point O) of the road itself should be approximately equal to:

where A'O and B'O is the distance from the point (O) of the bend of the road to the places of suppression of the axis of the road with the road (points A 'and B'), m;

- the removal of the middle (point C) of the AO section lying between two places of its intersection with the road from the bend point (point O) should exceed the maximum width of the AO more than three times:

where OS is the distance from the point (O) of the bend of the road to the middle (point C) of the ZO section, between two places of its intersection with the road (points A 'and B'), m.

This makes it possible to exclude the accidental hit of an intruder in the AO SB, in addition to the places of its intersection with the road.

The decision on the direction of the offender’s movement is automated: when the offender moves through the bend of the road, the CO generates alarms with durations (t ₁ ) and (t ₂ ), this information is transmitted to the information collection and processing system (SSOI). The information obtained in the SSOI is analyzed in the context of the well-known deployment scheme of CO on the ground, using an algorithm that determines the direction of movement of the intruder, by the value of the ratio of the duration of the first alarm to the duration of the second alarm, taking into account the maximum value of the estimated time interval for the accumulation of incoming signals (Fig. 5 )

The method includes two stages: preparatory and main.

Preparatory stage.

1. Deployment of the detection means 1 according to the established scheme (Fig. 3).

2. The deployment on the ground of a system for collecting and processing information, including: a timer control device 2, a timer 3, a signal receiver 4, a resolver 5, a monitor 6 (Fig. 7).

3. Determination of the maximum value of the accumulation time interval of incoming signals (T) (formula 10).

4. Drawing up a decision table on the direction of movement of the intruder through the bend of the road and loading it into the decisive device 5 (Fig. 5, 7).

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

1. Registration by the receiver 4 of the alarm signal from the detection means 1 when the intruder crosses its AO, the timer 3 is started by the timer control device 2, it starts counting the duration of the first alarm signal and the signal accumulation time (Δt) and recording information about the first alarm signal from the means 1 detection in the solving device 5 (Fig. 7).

2. When the detection means 1 is in standby mode, the duration value of the first alarm is recorded in the resolver 5. Continuation of the countdown time of the signals (Δt).

3. The registration by the receiver 4 of the second alarm signal from the detection means 1 when the intruder crosses the second time of its AO, the start of his counting of the duration of the second alarm and recording information about the second alarm from the detection means 1 to the resolving device 5.

4. When the detection means 1 is in standby mode, the value of the duration of the second alarm signal and the signal accumulation time (Δt) are recorded in the resolver 5.

5. The determination by the deciding device 5 of the direction of movement of the intruder by the value of the ratio of the duration of the first alarm to the duration of the second alarm (Fig. 6).

6. The formation of the output by the decisive device 5 about the movement of the intruder through the bend of the road without determining its direction if the signal accumulation time (Δt) exceeds the maximum calculated value (T) and the second signal does not arrive from the detection means 1 (Fig. 5).

7. Resetting timer 3 by timer control device 2.

8. The output to the monitor 6 (Fig. 7).

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

- FIG. 1 is a diagram of the deployment of CO in a known security monitoring method for covering a bend of a road using one CO;

- FIG. 2 is a diagram of the deployment of CO in a known security monitoring method for covering a bend of a road using two CO;

- FIG. 3 is a diagram of the deployment of CO in the proposed method, indicating the size;

- FIG. 4 is a table of typical geometrical dimensions of the SD;

- FIG. 5 - decision table (withdrawal algorithm) about the direction of movement of the intruder through the bend of the road;

- FIG. 6 - table of ranges of speeds of the intruder in various parts of the terrain;

- FIG. 7 is a structural diagram of the relationship of the devices used in the implementation of the method.

The technical result consists in obtaining the ability to determine the direction of movement of the intruder, found on the bend of the road, using only one CO.

Information sources

1. Shumov VV 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. Psarev A.A. Military Topography: Textbook. - M .: Military Publishing House, 1986 .-- 384 p.

3. Ganshin V.N., Khrenov B.C. Tables for the breakdown of circular and transitional lines. - K .: 1974. - 432 p.

4. 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.

5. 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.

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

Claims (1)

The security monitoring method, which consists in monitoring the bending of the road with a single radio-wave linear detection means, in ensuring that the system collects and processes the alarm information from the detection means when the intruder crosses the detection zone, characterized in that the detection means is deployed taking into account the expansion of the detection zone closer to the middle its axis according to the scheme in which the detection zone crosses the road in two places for which the width of the largest part of the detection zone exceeds the width the smaller of the sections is not less than three times, and the distance along the road between these intersection points exceeds one and a half times the distance traveled by the intruder at the maximum possible speed for this section of the road during the time required by the detection tool to switch from alarm mode to standby mode after exiting the intruder from his detection zone, by passing the detection means into the alarm mode twice when the intruder moves through a bend in the road, while the waiting time for the second alarm to arrive from the moment Nia first signal is limited and depends on the distance between the points of intersection of the detection zone with the road and the lowest possible speed of the intruder for a given road portion, and also the use of an algorithm, which determines the direction of movement of the intruder, the ratio of the first duration to the duration of the alarm of the second alarm.

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