RU2605509C1 - Method for signalling coverage of two-way road junctions - 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 single-position detection means, built on radio beam or infrared principles of detection, for signalling coverage of two-way road junctions. Method involves deploying at a road junction two single-position detection means such that, they are on opposite sides from point of branching of road and axis of detection zone of each detection means lies on one of diverging roads, wherein not less than 4/5 of length of detection zone covers section of road, detection zones themselves intersect at point of branching of road, in providing detection with apparatus for receiving signals, analysis and presentation of information of first alarm signal from detection means upon observing an intruder on junction; providing detection of next alarm signal from corresponding detection means; using an algorithm which determines direction of movement along arriving sequence of two alarm signals, duration of delay between their arrival and ratio between their durations. Method includes a preparatory step with deployment of two detection means on a set scheme and a main step which begins from moment intruder appears on junction and enters detection zone of detection means. During main step direction of movement is determined by a developed algorithm.

EFFECT: technical result consists in reduction of time, costs of effort and means to deploy detection means, providing concealment of use of detection means on area.

1 cl, 7 dwg

Description

The invention relates to methods for remote security monitoring of the terrain and can be used in cases of using single-position detection means (CO), built on the radio wave or infrared detection principles, for signaling cover of a two-way fork in the road [1].

Often the route of the intruder travels along the existing road network on the ground. In many ways, the success of apprehending an intruder depends on the knowledge of the direction of movement of the reaction forces. Therefore, significant attention is paid to the signal cover of the road network.

One of the most common elements of the road network is a two-way fork in the road. The branching angle of the roads on it is less than 180 degrees, which distinguishes it from the T-shaped intersection of roads. At the same time, the topology of the T-junction of roads and the two-way fork of the roads is the same and through both of them movement in six directions is possible: AB, BA, BC, CB, AC, CA (Fig. 1, 2).

In practice, for signal cover of sections of the road network, single-position COs are widely used, built on the radio wave or infrared detection principles, characterized by a small length of the detection zone (25-50 meters). The advantage of these tools is the possibility of low-cost and operational deployment, as well as a secretive location. At the same time, the operation of radio-beam (infrared) detection tools (RL and IR CO) is possible only if the condition for the absence of obstacles to the propagation of radio (infrared) waves is met [1]. Such obstacles can be, for example, trees, shrubs, tall grass. Therefore, radar and infrared CO must be used either in an open area, or after clearing the area of vegetation (after work on the preparation of the area).

At the same time, in most cases, for his movement, the intruder chooses roads located in closed terrain (covered with trees, shrubs, tall grass), therefore, when deploying radar and infrared CO in such terrain, additional work is required to prepare the terrain.

The prototype of the proposed method is a method for determining the direction of movement of the intruder at the T-shaped intersection of roads, which consists in deploying two SSs so that each of them covers two roads and the distances traveled by the intruder through the intersection in a given direction from the first to the last extended detection zone ( AO), were the same for all directions, the short and long distances between adjacent lying places of intersection of detection zones with roads are correlated as 1: 7, in ensuring the register equipment for receiving signals, analyzing and presenting the first alarm information from the detection means when an intruder appears at the intersection, as well as the start of the time interval Δt; ensuring registration of subsequent alarms from the corresponding detection means with the continuation of the countdown of the time interval Δt; applying an algorithm that determines the direction of movement in a sequence of two alarms or a sequence of three alarms received for a set time interval, and the relationship between the time intervals of the delay in their receipt according to the table of correspondence of the direction of movement of the intruder and the sequence of alarms [2].

The disadvantages of this method are the need for preparatory work to clean the area of vegetation that impedes the propagation of radio (infrared) waves, and the associated reduction in the deployment of funds, the use of additional forces and funds to carry out these works, violation of the conditions for the covert use of CO on the ground (unmasking funds) (Fig. 1).

Such works on clearing the area from vegetation, such as cutting trees and shrubs, mowing tall grass, require significant material and time costs, and the resulting areas cleared from vegetation will unmask the deployment site of CO against the background of the remaining vegetation. So, for example, cutting a stump of a hardwood tree with a diameter of up to 40 cm flush with the ground requires up to 0.41 people * hour, over 40 cm - up to 0.511 people * hour [3].

The aim of the invention are: reduction of time costs, the cost of manpower and funds for the deployment of detection tools, ensuring the secrecy of the use of detection tools on the ground.

To achieve this goal, a method was developed for the signaling cover of a two-way fork in the road, consisting in the deployment of two single-position SSs at the fork in the road so that they are located on opposite sides of the road branching point and the axis of the detection zone of each SS lies on one of the diverging roads, moreover, at least 4/5 of the length of the AO covered a section of the road, the AO themselves intersected at the junction of the road, in order to ensure registration of signal reception, analysis and presentation of information by equipment ation of the first alarm signal (ST) of CO at an intruder on the fork; ensuring registration of the subsequent ST from the corresponding JI; applying an algorithm that determines the direction of movement of the received sequence of two STs, the duration of the delay between their arrival and the relationship between their durations (Fig. 3-5).

On the road (trail) itself there is no vegetation that impedes the propagation of radio (infrared) waves, and its width is commensurate with the width of the IR and RL CO (Fig. 3). Therefore, if we orient the axis of the AO CO along a section of the road in such a way that for the most part it covers this section and is out of the area covered with vegetation, the need to carry out work on preparing the area for the deployment of CO will disappear.

At a two-way fork in the road, the movement of the offender is possible in 6 directions: AB, BA, BC, CB, AC, CA (Fig. 2). Determining the direction of movement of the detected intruder is possible by the sequence of receipt of two CTs (CO1 and CO2 or CO2 and C01), the relationship between the durations of these signals, and also by the duration of the delay between the receipt of two CTs (Figs. 4, 5).

Theoretically, at a uniform speed of movement of the intruder through the fork in the direction of the aircraft or NE, the duration of the alarm signals from both COs will be approximately the same, since the intruder will cross their DA along the axis, passing almost equal distances (Fig. 2, 4):

where L _CO1 , L _CO2 are the lengths of the sections of the detection zones of the detection tools 1 and 2, respectively, oriented along the roads, m

The walking intruder moves at a speed the limits of which depend on the state of the road (Fig. 6). Moreover, the non-uniformity of the speed of its movement, characterized by the ratio of the upper value of the speed (V _MAX ) to the lower (V _MIN ), lies in the range 1.5 ... 2.0 [4, 5]. For simplicity of calculation and increasing the stability of the result to possible actions of the violator, the maximum value of the unevenness of his speed of movement is taken.

where V _MAX , V _MIN - the maximum and minimum possible speeds of the intruder through the fork in the road, m / s.

Given the uneven movement of the intruder through the fork in the road, the ratio of the durations of the alarm signals from the means of detection of СО1 and СО2, when the intruder crosses the AE along their axis (movement in the directions of the Armed Forces or NE) will lie in the range from 0.5 to 2:

where t _LCO1 , t _LCO2 - the duration of the alarm signals from the detection means СО1 and СО2, when the intruder crosses the detection zones along their axis, sec.

Also, when the intruder moves in the directions of the Armed Forces or the NE, a noticeable delay between the receipt of alarms from the CO will be recorded. This is due to the fact that the intruder enters the COZ (CO2) zone only after he has practically crossed the entire CO2 (CO2) zone. The delay in the signal is determined by the length of the section of the AO CO, which the intruder will cross the first before entering the AO of the second CO, and the possible range of speeds of the intruder (V _MAX ) and (V _MIN ). To calculate the minimum possible delay between the arrival of two STs (the worst conditions for determining the direction of movement), the maximum possible speed of movement of the walking intruder is taken:

where ΔT _MIN is the minimum possible delay between the receipt of two alarms, sec.

The numerical value of this delay at V _MAX is 2.7 m / s (10 km / h) and a length of 30 km and 25 meters is more than 7 and 14 seconds, respectively. When the intruder moves with an average speed of 1.1 m / s (4 km / h), both of these values increase by more than two times (Fig. 5).

At the beginning of the movement of the intruder in the directions AB or AC, he begins to intersect the AO of both COs simultaneously, so the delay between the receipt of alarms will be no more than 1-2 seconds and it is associated with the technical features of the CO (Fig. 4, 5).

When the intruder moves in the directions BA, AB, AC, CA, the duration of the alarm of one of the COs will be significantly longer than the duration of the other. This is due to the fact that the AO means, the duration of the alarm which is longer, the intruder will cross along its axis, while the AO of another means - across (Fig. 2, 4). The length of the AO radar and infrared CO, oriented along the road, lies within 20-40 meters (which is 4/5 of the entire length of the zone), the width of the AO at a distance of 1/5 of the means is no more than 2-3 meters, therefore, for traffic directions CA and AC (Fig. 3):

where H _CO1 , H _CO2 - width of the detection zone of CO1 and CO2, respectively, at the junction of roads, m.

For directions of movement BA and AB (Fig. 5):

Given formulas 2 and 5, under the conditions when the intruder crosses the SC along its axis at a speed half that of the speed with which it crosses the SC across its axis (the worst conditions for determining the direction of movement), the ratio of the duration of the alarm signals for the directions CA and AC motion will be equal to:

where t _НСО1 , t _HCO2 - duration of alarms from the detection means CO1 and CO2, when the intruder crosses the detection zones across its axis, sec.

For driving directions BA and AB:

The numerical value of the ratio of the duration of the CO1 alarm signal to the duration of the CO2 alarm signal with a 30 ° long is 25 meters and the directions of movement of the SA and AC (Fig. 4, 5):

For directions of movement BA and AB less than 0.25 (Fig. 4, 5):

The same ratio for CO with a length of ZO-50 meters is important for the direction of SA and AC not less than 8 (Fig. 4, 5):

For directions BA and AB less than 0.125 (Fig. 4):

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

- FIG. 1 is a deployment diagram of detection means in a known method for determining the direction of movement of an intruder at a T-junction;

- FIG. 2 is a diagram of the deployment of detection tools at a two-way fork in the proposed method;

- FIG. 3 is a diagram of the deployment of detection tools in the proposed method with size;

- FIG. 4 is a table of signs indicating the direction of movement of the intruder and used in the proposed method;

- FIG. 5 is a decision table on the direction of movement of the intruder in the proposed method;

- 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.

When implementing the method, the following devices are used: detection means 1 with transmitter No. 1, timer control device 2, detection means 4 with transmitter No. 2, signal receiver 5, resolving device 6, monitor 7 (Fig. 7).

The method includes two stages: preparatory and main.

Preparatory stage:

1. The deployment of means 1 and 4 of detection with the transmitter No. 1, No. 2 according to the established scheme (Fig. 3).

2. Deploying on-site equipment for receiving signals, analyzing and presenting information, including: timer control device 3, timer 3, detection means 4 with a transmitter, signal receiver 5, resolver 6, monitor 7 (Fig. 7).

3. Drawing up a decision table on the direction of movement of the offender through a two-way fork in the road and loading it into the decisive device 6 (Fig. 5).

The main stage begins when the offender moves through the fork in the road and includes:

1. Registration by the receiver 5 of the first alarm signal from one of the means 1, or 4 of the detection with the transmitter when the intruder crosses its ST, start the timer 3 by the timer control device 2, start the countdown of the time interval and record the number of the detection means in the resolver 6 (FIG. 7).

2. Registration by the receiver 5 of the subsequent alarm signal from the detection means 4 or 1 with the transmitter when the intruder crosses its SC, fixing the delay time for its arrival and continuing to count down the time interval with timer 3 and recording them in the resolver 6 and (Fig. 7).

3. The timer 3 fixing the duration of the alarm signals from the means 1 and 4 of detection with the transmitter during their sequential transition to standby mode.

4. The end of the countdown of the time interval by the timer 3 and registration by the receiver 5 of the alarms from the detection means when both COs are in standby mode by the command of the resolver 6.

5. The determination by the deciding device 6 of the direction of movement of the intruder according to the decision table on the direction of movement of the intruder (Fig. 5).

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

The technical result consists in reducing time costs, the cost of manpower and funds for the deployment of detection tools, ensuring the secrecy of the use of detection tools on the ground.

Information sources

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

2. A method for determining the direction of movement of an intruder at a T-junction: application for invention / S.A. Udot., Fedorovtsev D.G., N.L. Astashev - No. 2015118481; declared 05/15/15.

3. Typical felling rates, time limits for felling in lowland conditions. - M .: 1999. - 83 p.

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

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

Claims (1)

The method of signaling cover for a two-way fork in the road, which consists in deploying two detection means at a fork in the road, in providing equipment for recording signals, analyzing and presenting the first alarm information from the detection means when an intruder appears at the fork; ensuring registration of a subsequent alarm from an appropriate detection means; applying an algorithm that determines the direction of movement of the received sequence of two alarms according to the table of correspondence of the direction of movement of the intruder and the sequence of alarms, characterized in that one-way detection means are deployed that are deployed on opposite sides of the road branching so that the axis of the detection zone of each detection tools lay on one of the diverging roads, and at least 4/5 of the length of the detection zone covered the area ok roads, detection zones themselves intersected at the junction of the road; in the algorithm for determining the direction of motion, the duration of the delay between their signals and the ratio between their durations is also taken into account.

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