RU2605063C1 - Method for signalling coverage of local area with three-way road junction - Google Patents

Abstract

FIELD: security systems.

SUBSTANCE: invention relates to methods for remote security monitoring of an area and can be used in cases of using detection means with an extended linear part in form of a flexible cable, built on a wire-wave or seismic principle of detection, for signalling coverage of three-way road junctions and paths of their bypass. Method involves deploying on road junction and adjoining location to detection means such that, extended linear part of each detection means with length equal to three times width of detection area, lies in close proximity along one of roads, covering its own detection area; in deploying extended linear part of first detection means from point of divergence of roads at a distance, numerically equal to distance, traveled by intruder with maximum allowable speed for a given area for a time, required by triggered detection means for transition into a standby mode after intruder exits its detection area; intersection of section of extended linear part of first detection means, not located along road, central and one of extreme roads; deploying extended linear part of second detection means along extended linear part of first detection means at a distance equal to six times width of detection area, and intersection by section of extended linear part of second detection means, not located along road, central and other extreme roads; using an algorithm which determines direction of movement of intruder on order of arrival over a set time interval of one, two or four alarm signals and ratio between their durations. Method includes a preparatory step with deployment according to a developed scheme extended linear parts of two detection means on an area and a main step which begins from the moment an intruder enters detection area of one of detection means, during which intruder is detected and direction of movement thereof is determined.

EFFECT: technical result consists in simplification of scheme for deployment of extended linear part of detection means and enabling use of detection means, which in their tactical-technical characteristics have width of detection area of up to 10 m and length of extended linear part of up to 250 m.

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Description

The invention relates to methods for remote security monitoring of the area and can be used in cases where detection means (CO) with an extended linear part (PLC) in the form of a flexible cable, built on a wire-wave or seismic detection principles, are used for signaling cover of a three-way fork of a road and tracks bypassing them.

As a rule, the intruder builds the route of his movement taking into account the existing network of roads on the ground. He moves either along the road itself, or along it at a safe distance from it (bypassing). In many respects, the success of apprehending an intruder depends on the knowledge of the direction of his movement by the reaction forces, therefore, considerable attention is paid to the signal cover of roads and ways around them [1].

One of the most common elements of the road network is a three-way fork in the road. The topology of the three-way fork of the road and the four-way intersection is the same and through both of them movement in 12 directions is possible: AB, AC, AD, BA, BC, BD, CB, CA, CD, DB, DA, DC (Fig. 1, 2).

The prototype of the proposed method is a method for detecting an intruder and determining the direction of his movement at the crossroads and ways to bypass it [2]. The method consists in deploying at a four-way intersection of roads and adjacent terrain two COs with an extended linear part, so that the PLC of each CO one of the roads intersects transversely at a distance from the center of the intersection, equal to three times the width of the detection zone (ZO) of the CO itself, and a section of a certain length lay in close proximity along another road, covering it with its own AO, the ratio of the width of the AO CO to the lengths of the sections 1: 3: 22.5, and the application of an algorithm that determines the direction of movement of the intruder by the number, sequence and relative Incoming between durations alarms (FIG. 1).

This method has a significant drawback - the complex deployment scheme of the PLC and the associated impossibility of using CO, which in terms of their performance characteristics (TTX) have a detection zone width of up to 10 meters and a PLC length of up to 250 meters. As a rule, industry manufactures СО with a PLC length of 250 or 500 meters [3, 4].

So, in the scheme of the known method, the PLC of one of the two COs has a section 22.5 times longer than the width of the SC, which must be deployed along the road [2]. With the width of the detection zone up to 10 meters, this length should be 225 meters (90% of the entire PLC with a length of up to 250 m). Obviously, with such requirements for the size of the section of the PLC deployed along the road, the known method for CO with the above TTX is not applicable (Fig. 2). At the same time, such RMs are widespread, these are mainly cable seismic RMs [3, 4]. The complexity of the deployment scheme WITH in the known method lies in the fact that the work of deploying the PLC along the road requires maintaining a certain distance for several hundred meters in order for the AO to cover it, and careful masking of these several hundred meters of PLC due to the close distance from her roads.

The aim of the invention is to simplify the deployment scheme of PLC WITH and getting the opportunity to use WITH, which in their performance characteristics have a width of the detection zone up to 10 meters and a length of PLC up to 250 meters.

To achieve this goal, a method has been developed for signaling cover of a local area with a three-way fork in the road, consisting in deploying at the fork in the road and adjacent terrain two SSs so that the PLC of each SS with a length of three times the width of the detection zone (ZO) lies in close proximity along one of the roads, covering it with its AO; in deploying the PLC of the first SS from the place of the road divergence at a distance numerically equal to the distance traveled by the intruder at the maximum permissible speed for a given area during the time required for the triggered detection tool to go into standby mode after the intruder leaves his ZO; the intersection with the PLC section of the first JI, not lying along the road, central and one of the extreme roads; deploying the PLC of the second JI along the PLC of the first JI at a distance equal to six times the width of the detection zone, and crossing the section of the PLC of the second JI, not lying along the road, the central and other extreme roads; applying an algorithm that determines the direction of movement of the intruder in order of receipt for a set time interval of one, two or four alarms and the relationship between their durations (Fig. 3-5).

Compared with the known method in the proposed method, in the PLC deployment scheme, both sections lying along the road have a length equal to three times the width of the SD, which greatly simplifies the deployment plan for the PLC CO (Fig. 2, 4). However, equalizing along the length of the PLC sections lying along the roads of both SSs can lead to a decrease in the information content of the directions of the intruder's movement (for example, the directions of AC and DB, CA and BD will be determined in pairs) [2]. Therefore, in order not to reduce the information content of the direction of movement of the detected intruder in the proposed method, the PLC of both SSs is deployed so that they cross not one road, as in the known method, but two. This adds informative features indicating the direction of movement of the intruder. So, when an intruder moves through a local area with a three-way fork in the road, one, two or four alarms may come from the CO, in the known method the number of incoming alarms is not more than two (Fig. 5).

When the intruder moves around a three-way fork in the road, only one alarm will come from CO1 or CO2, depending on which side of the fork (left or right) it will be bypassed (Fig. 3, 5).

When the intruder moves through a three-way fork in the road in the directions AB, AC and AD, two alarms will be received sequentially: first from CO1, then from CO2 (Fig. 5).

When the intruder moves in the directions of VA, CA, and DA, two alarms will be received sequentially: first from CO2, then from CO2 (Fig. 5).

When the intruder moves in the directions BC, BD, CB, CD, DB, and DC, four alarms will be received: first one from CO2, then two signals from CO2, and again one alarm from CO2 (Fig. 5).

The direction of movement of the detected intruder is determined by comparing the order of receipt of one, two or four alarms from CO1 and CO2 and the relationship between their durations. Differences in the number of incoming alarms and the sequence of triggered COs were indicated above. The differences in the duration of the alarms are due to the fact that the PLC of each CO two roads cross across, and along the third road lie a section of length equal to three times the width of the AO (Fig. 4).

A walking intruder moves at a speed the limits of which depend on terrain conditions (Fig. 6). The limits of these velocities are practically determined, known and confirmed on the basis of experimental studies [5, 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 value of the speed of movement of the intruder, taken for a covered area, m / s;

V _MIN - the minimum value of the speed of movement of the intruder, adopted for the covered area, m / s.

Considering that the maximum possible speed of the intruder at the fork in the road does not exceed the minimum possible more than 1.5 times, the length of the section lying along the road is chosen as:

where ΔL is the length of the PLC sections lying along the road, m;

N is the width of the CO detection zone, m

With such a length of the section lying along the road, even with an uneven speed of the intruder, the duration of the alarm signal when it moves along the PLC will always be longer than when it crosses the PLC lying across the road (Fig. 4, 5):

where t _H - the duration of the alarm when the intruder crosses the PLC lying across the road, s;

t _ΔL ^{_ the} duration of the alarm when the intruder moves along a section of the road along which the PLC CO lies, s.

The duration of the alarm signals when the intruder crosses sections equally oriented relative to the roads (lying across or along it), taking into account the uneven speed of the intruder, will not differ from each other by more than 1.5 times (Fig. 5).

where t _H1 - the duration of the alarm received from CO1, when the intruder crosses its PLC lying across the road, s;

t _H2 is the duration of the alarm received from CO2 when the intruder crosses its PLC lying across the road, sec.

where t _ΔL1 is the duration of the alarm received from CO1 when the intruder crosses the PLC lying along the road, s;

t _ΔL2 ^{_ the} duration of the alarm received from CO2, when the intruder crosses the PLC lying along the road, sec.

Therefore, in order to distinguish between the directions AB, AC, AD, it is taken into account that when the intruder moves in the direction AB, the ratio of the duration of the first signal to the duration of the second signal lies in the range 0.22-0.5; in the AC direction, the ratio of the duration of the first signal to the duration of the second signal is in the range of 0.67-1.5, in the direction AD is the ratio of the duration of the first signal to the duration of the second signal is in the range 2.0-4.5 (Fig. 5) . In the same way, the directions of BA, CA, and DA differ from each other (Fig. 5). When determining BC, BD, CB, CD, DB, and DC, the ratio of the duration of the third signal to the duration of the fourth is also taken into account (Fig. 5).

When the intruder moves in the directions BC, BD, CB, CD, DB and DC CO1, an alarm should be issued twice. To eliminate the error of the conclusion about the direction of movement, it is important to ensure that the condition is met under which СО1 was already in standby mode before the intruder re-crossed his ZO. Those. the time for CO1 to enter standby mode after the intruder leaves his ZO must be less than the time spent by the intruder for moving from one to another section of the PLC CO1.

where t _DR - time to establish CO1 in standby mode after the intruder leaves the detection zone, s;

t _HAP - time spent by the intruder on moving from one to the other section of the PLC CO1, s.

The path of the intruder from one to the other part of the PLC CO1, when moving in the directions BC, BD, CB, CD, DB and DC, passes through the place where the roads diverge. Therefore, taking into account the guaranteed fulfillment of the condition (formula 6), the removal of the PLC CO1 from the fork in the road can be taken equal (Fig. 4):

where V _MAX - the maximum value of the speed of movement of the intruder, adopted for the covered area of the terrain m / s;

t _DR - time to establish CO1 in standby mode after the intruder leaves the detection zone, s;

S ₁ - the distance from the place of divergence of roads to the PLC CO1, m.

The distance between the PLCs СО1 and СО2 themselves is determined based on the fulfillment of the conditions for guaranteed non-intersection of their PLCs with each other, depends on the length of the section lying along the road, and can be taken (Fig. 4):

where S2 is the distance between the PLC CO1 and the PLC CO2, m.

Given the fact that the length of the section of the PLC lying along the road is three times the width of the DA (formula 2):

To eliminate the error associated with the coincidence of the beginning of a sequence of four signals with the entire sequence of one and two signals, the conclusion about the direction of movement of the intruder, when one (direction of movement bypass) and two alarms (direction of movement AB, AC, AD, In A, CA, DA) is done not earlier than the maximum accumulation time of incoming signals (Fig. 5):

where Δt is the accumulation time of incoming signals, s;

T is the maximum accumulation time of incoming signals, s.

This interval is determined by the maximum possible time for which the intruder passes the BD (DB) direction with the minimum speed taken for the covered area. For simplicity of calculations, it is assumed that all distances along the roads from the branching point to PLC CO1 and CO2 are equal, then the distance traveled by the intruder in the direction BD (DB) with the PLC crossing four times and taking into account formulas 7 and 9 will be equal to:

where S is the distance traveled by the intruder when crossing the PLC four times, m.

Given the guaranteed exclusion of errors in determining the direction of movement:

where V _MIN - the minimum value of the speed of movement of the intruder, adopted for the covered area, m / s.

The method includes two stages: preparatory and main.

The preparatory phase includes:

1. The deployment of means 1 and 4 of detection with a transmitter, taking into account the recommended geometric parameters ΔL, S ₁ , S ₂ (Fig. 4).

2. Deployment on the ground of equipment for receiving, analyzing and presenting information, including a signal receiver 5, a timer control device 2, a timer 3, a resolver 6 and a monitor 7 (Fig. 7).

3. Determination of the maximum accumulation time of the incoming signals T (formula 12).

4. Drawing up a decision table (withdrawal algorithm) about the direction of movement of the intruder at a three-way fork in the road and loading it (him) into the decider 6 (Fig. 5).

5. The beginning of the operation of the detection means 1 and 4 with the transmitter in standby mode.

The main stage begins when the offender moves through a three-way fork in the road or bypassing it and falling into the CO detection zone, it includes:

1. Registration by the receiver 5 of the first alarm signal from one of the detection means 1 or 4 with the transmitter when an intruder appears in his detection zone, the timer 3 starts by the timer control device 2, he starts counting the duration of the alarm, the accumulation time of the incoming signals Δt and recording the number of triggered detection means to the resolver 6 (Fig. 7).

2. Record in the solver 6 the duration of the first alarm after it ends. Registration by receiver 5 of a possible second (third, fourth) alarm and determining their duration by timer 3. Stopping timer 3 if the accumulation time of the signals (Δt) reaches the maximum accumulation time of incoming signals (T) or earlier, if the fourth signal ends anxiety. Comparison by the deciding device 6 of the arrival order number for a set time interval of one, two or four alarms, the relationship between their durations with the decision table (output algorithm) on the direction of movement of the intruder (Fig. 5).

3. Formation of a conclusion about the place of violation by the decisive device 6.

4. Zeroing the timer 3 device 2 timer control. The output of the location of the violation on the monitor 7 (Fig. 7).

The invention is illustrated by graphic materials, which represent:

- FIG. 1 is a diagram of the deployment of a PLC CO at a four-way intersection in a known method and examples of directions of movement of the intruder;

- FIG. 2 is a diagram of the deployment of the PLC CO at a three-way fork in the road in a known manner;

- FIG. 3 is a diagram of the deployment of the PLC CO in the proposed method and examples of directions of movement of the intruder;

- FIG. 4 is a diagram of the deployment of PLC WITH in the proposed method with an indication of the size;

- FIG. 5 - decision table (withdrawal algorithm) on the direction of movement of the offender at a three-way fork in the road;

- FIG. 6 - summary table of possible speeds of movement of the intruder through various sections 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 simplifying the deployment scheme of the PLC JI and getting the opportunity to use JI, which in terms of their tactical and technical characteristics have a width of up to 10 meters and a length of the PLC of up to 250 meters.

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. Pat. 2554530 Russian Federation, IPC 51 G08В 13/00, G08В 13/24. A method for detecting an intruder and determining the direction of his movement at the crossroads and ways to bypass it / S.A. Udot., Fedorovtsev D.G. - No. 2014109735/08; declared 03/13/14; publ. 06/27/15, Bull. Number 18.

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

4. 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.

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

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

Claims (1)

A method of signaling cover for a three-way fork of a road and ways to bypass it, which consists in deploying two detection means with an extended linear part at a three-sided fork of the road and adjacent terrain so that the extended linear part of each detection means with a section of a certain length lies in close proximity along one of roads, covering it with its detection zone, applying an algorithm that determines the direction of movement of the intruder by the number, priority of arrival and the relation between the durations of alarms, characterized in that the extended linear part of the first detection means is deployed from the place of the road divergence at a distance numerically equal to the distance traveled by the intruder at the maximum permissible speed for a given area in the time required for the triggered detection means to enter standby mode after the intruder’s exit from his DA; and a section that does not lie along the road intersects the central and one extreme roads; an extended linear part of the second detection means is deployed along the extended linear part of the first means at a distance equal to six times the width of the detection zone; a section that does not lie along the road intersects the central and other extreme roads; the ratio of the width of the detection zone of both detection tools and the lengths of sections lying along the roads, 1: 3; in the algorithm that determines the direction of movement of the intruder, one, two or four alarms received for the set time interval are analyzed.

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