RU2540841C1 - Method for signalling coverage of road intersection and detours thereof - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention can be used when employing detection means with an extended linear part, which are based on a wave-conduction or vibration detection principle, for signalling coverage of a four-way road intersection and detours thereof. The method includes deploying, at a four-way road intersection and the adjacent area, two detection means with an extended linear part such that the extended linear part of each means overlaps two different roads, one twice and other once, with the ratio between the distances from the centre of the intersection to the intersection points of 1:2:1 and using an output algorithm which determines the direction of movement from a sequence of one to four alarm signals coming from the detection means over a set time for accumulation thereof, and the ratio between time intervals of delay between the arrival of signals. The method includes a preparatory step with deployment based on a developed scheme of the extended linear part of two detection means on an area and a main step which begins from the moment an offender enters the detection area of one of the detection means, during which the offender is detected, and the direction of movement of the offender is determined.

EFFECT: high probability of detection and accuracy of indicating the direction of an offender during signalling coverage of a road intersection and detours thereof using only two detection means.

13 dwg

Description

The invention relates to methods for remote security monitoring of the terrain and can be used in cases of using detection tools (CO) with an extended linear part (PLC), built on a wire-wave or vibration detection principle, for signaling cover of four-way intersections and ways to bypass them [1 -3].

As a rule, the intruder builds the route of his movement taking into account the existing network of roads on the ground. It moves either along the road itself or along it at a safe distance (bypassing) [4]. In many ways, the success of apprehending an intruder depends on the knowledge of the direction of movement of the reaction forces. Therefore, considerable attention is paid to the signal cover of the four-way intersections of roads and ways to bypass them. In practice, SOs with PLCs based on the line of the leaky wave or the vibrational detection principle are widely used for this [1-3].

There is a method of signaling cover for a crossroads and ways around it using the considered CO, which consists in deploying two CO at the intersection and the subsequent analytical conclusion about the direction of movement of the intruder in sequence and CO numbers that issued alarms (Figs. 1, 2) [2]. The disadvantage of this method is the low probability of detection and accuracy of indicating the direction of movement of the intruder. So, of the fourteen possible directions of movement (twelve through the intersection and two bypassing it), two are uniquely determined, ten are defined in two groups of five, and when the intruder moves in two directions, he is not detected at all (Fig. 3). Also known is a method of signaling cover for intersections in which, in order to increase the probability of detecting an intruder and the accuracy of indicating his direction of movement, four SDs are deployed (Fig. 4). The disadvantage of this method is the need to increase the number of CO compared with the known first method.

The aim of the invention is to increase the likelihood of detection and accuracy of indicating the direction of movement of the intruder with the signal cover of the intersection and ways to bypass it using only two CO.

To achieve this goal, a method of signaling cover for a crossroads and ways to avoid it was developed, which consists in deploying two detection means with a long linear part at a four-way crossroads and adjacent terrain so that the long linear part of each means crosses two different roads, one two times, another one time, with the ratio between the distances from the center of the intersection to the intersection points 1: 2: 1, in the application of the inference algorithm that determines the directions movement in sequence from one to four alarm signals received from the detecting means sets a time for their storage, and a relation between a time slot delay between receipt of signals.

At the crossroads of roads, PLC means of detection are deployed so that they cover two adjacent to the center of the road, and the relationship between the distances from the center of the intersection to the points of intersection of the PLC with roads was (Figs. 5, 6):

$$OB\text{'}\text{'}:OB\text{'}\text{'}\text{'}\text{'}:OC\text{'}\text{'}=OD\text{'}\text{'}:OD":OA\text{'}\text{'}=\mathrm{one}:2:\mathrm{one},\left(\mathrm{one}\right)$$

where OB ', OB' ', OS', OD ', OD' ', OA' are the distances from the center of the intersection to the intersection points of the PLC with the road, m.

The distances OA ', OB', OS ', OD' are the smallest and can be considered single:

$$OA\text{'}\text{'}=OB\text{'}\text{'}=OC\text{'}\text{'}=OD\text{'}\text{'}=G,\left(2\right)$$

where G is the unit distance from the center of the intersection to the intersection points of the PLC with the road, m (Fig.6).

In order to exclude a situation in which the intruder crosses the extended linear part of the aircraft for a second time, which did not become standby after the intruder left his detection zone during the first crossing, the unit distance value is selected:

$$G=\mathrm{one},3*\left(H+V_{MAX}^{}*t_{DR}\right),\left(3\right)$$

where t _DR - time to set the CO in standby mode, s;

H is the width of the detection zone of the detection means, m;

V _MAX - the upper limit of the speed of the intruder at the crossroads, m / s.

The movement of the intruder bypassing the intersection is determined by a single alarm signal coming from CO1: if he bypasses the AC vertical road to the right, or from CO2 if he bypasses it on the left (Figs. 7, 8).

When the intruder moves through the intersection, a sequence of two, three or four alarms from the CO is possible. The movement of the intruder through the intersection in the directions: AB, AC, DC, CA, BA, CD, DB, BD is determined by a unique sequence of signals for each of the listed directions (Fig. 8).

When the intruder moves in the directions: AD and DA, BC and SV, the same sequences of three signals arrive in pairs. Therefore, the directions of motion of AD and DA, BC and NE are determined by the sequence of incoming signals and by the ratio of the time intervals of the delay between the arrival of signals, between the first and second signal (Δt _1-2 ) and the second and third (Δt _2-3 ). Depending on the direction of movement (AD, CB or DA, BC), the first time (Δt _1-2 ) delay is constantly greater or less than the second (Δt _2-3 ) (Fig. 8):

$$\Delta t_{\mathrm{one}-2}>\Delta t_{2-3}\mathrm{and}l\mathrm{and}\Delta t_{\mathrm{one}-2}<\Delta t_{2-3},\left(\mathrm{four}\right)$$

where Δt _1-2 is the time interval of the delay between the receipt of the first and second alarms, s;

Δt _2-3 - the time interval of the delay between the receipt of the second and third alarms, s.

The time interval Δt _{1-2 is} calculated as:

$$\Delta t_{\mathrm{one}-2}=t_2-t_{\mathrm{one}},\left(5\right)$$

where t ₁ - the time of the first alarm, s, the origin is 0;

t ₂ - time of receipt of the second alarm, s.

The time interval Δt _{2-3 is} calculated as:

$$\Delta t_{2-3}=t_3-{\mathrm{<figure-callout\; id="2"\; label="t"\; filenames="00000016.png,00000017.png"\; state="\{\{state\}\}">t</figure-callout>}}_2,\left(6\right)$$

where t ₃ - time of receipt of the third alarm, sec.

The ratios of the distances from the center of the intersection to the intersection points of the PLC with the road are determined so that the ratio of Δt _1-2 to Δt _2-3 (less or more) during the movement of the intruder in the given direction is maintained even with an uneven movement of the intruder, when the short distance between the PLC of the intruder runs at its minimum speed, and a longer distance at maximum speed.

For directions of movement AD and CB:

$$\Delta t_{\mathrm{one}-2}/\Delta t_{2-3}>\mathrm{one},3PR\mathrm{and}{V}_{MIN}\le V_H\le V_{MAX},\left(7\right)$$

where V _H - the speed of the intruder at the intersection, m / s.

V _MAX , V _MIN - upper and lower limits of the speed of the intruder at the crossroads, m / s.

For directions of movement DA and BC:

$$\Delta t_{2-3}/\Delta t_{\mathrm{one}-2}>\mathrm{one},3PR\mathrm{and}{V}_{MIN}\le V_H\le V_{MAX}.\left(8\right)$$

The walking intruder moves at a speed the limits of which depend on terrain conditions (Fig. 9). The limits of these speeds are practically determined, known and confirmed on the basis of experimental studies [4-6]. The upper limit of the speed of the intruder does not exceed the lower one by more than one and a half times (Fig.9).

$$V_{MAX}/V_{MIN}<\mathrm{one},5.\left(9\right)$$

In this case, the ratio of the distances between the sections of the extended linear part crossing the road is equal to (Fig.6):

$$C\text{'}\text{'}B\text{'}\text{'}/B\text{'}\text{'}B\text{'}\text{'}\text{'}\text{'}=A\text{'}\text{'}D\text{'}\text{'}/D\text{'}\text{'}D"=2\left(10\right)$$

Thus, the excess of the distance relations over the relations of the speed limits ensures the preservation of the relations of time intervals (longer, shorter) in case of an uneven movement of the intruder (see formulas 7, 8).

In some incoming sequences (for example, for the direction of DB and DC), the first signals may coincide (Fig. 8). To eliminate the error of the conclusion about the direction of movement, the accumulation time of the incoming signals cannot be less than the minimum value:

$$$$

$$\Delta t\ge T=\mathrm{one},2*S_{MAX}/V_{MIN},\left(\mathrm{eleven}\right)$$

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

T is the minimum accumulation time of incoming signals, s;

S _MAX - the maximum distance traveled by the intruder through the intersection in a given direction from the first to the last intersection with the linear part of the CO, m;

V _MIN - the lower limit of the speed of the intruder at the intersection, m / s.

Moving in a given direction through the intersection, the intruder passes from two to four unit distances G, then (Fig.6):

$$T=\mathrm{one},2*\mathrm{four}*G/V_{MIN}.\left(12\right)$$

CO built on a wire-wave or vibration detection principle have a certain width of the detection zone (H) (Fig. 11). In order to exclude the intruder from entering the CO detection zone when he moves along the road along which the PLC is deployed, the distance S is set (Fig. 12):

$$S=2*H,\left(13\right)$$

where S is the distance from the road to the portion of the linear part bounded by points B ', B' 'and D,' D '', m;

N is the width of the detection zone of the detection means, m (11).

The width of the detection zone varies for different CO (figure 10).

The method includes two stages: preparatory and main.

The preparatory phase includes:

1. The deployment of means 1, 2 detection with transmitters, taking into account the recommended parameters of the signaling line (Fig.6, 10, 12, 13).

2. Deploying on-site equipment for receiving signals, analyzing and presenting information, including: a signal receiver 3, a timer control device 4, a timer 3, a resolver 6, a monitor 7 (Fig. 13).

3. Determination of the minimum accumulation time of incoming signals T (formula 12), (figure 10).

4. Drawing up a decision table (withdrawal algorithm) about the direction of movement of the intruder at the four-way intersection and loading it (him) into the decider 6 (Fig. 8).

5. The beginning of the work of means 1 or 2 of detection with the transmitter in standby mode.

The main stage begins when the intruder moves through the intersection or bypasses it and enters it into the detection zone of one of the CO and includes the following steps.

1. Registration by the receiver 3 of the first alarm signal from one of the detection means 1 or 2 with the transmitter when the intruder crosses his detection zone, start the timer 5 by the timer control device 4, start the countdown of the time interval Δt _1-2 , Δt and record the number of the detection means in solving device 6 (Fig.13).

2. Further registration by the receiver 3 and comparison by the resolver 6 of the incoming sequence of signals, the relationship between the time intervals of the delay between their arrival and those available in the decision table (output algorithm) about the direction of movement of the intruder (Figs. 8, 13).

3. The formation of one of the conclusions about the direction of movement of the intruder by the decisive device 6, depending on the further received data used for analysis (Fig. 8):

a) the conclusion about the movement of the intruder bypassing the intersection (to the right of the AC road or to the left of the AC road) when the accumulation time of incoming signals (Δt) is reached, counted down by timer 5, the minimum accumulation time of incoming signals (T) and no other signals to the receiver 3 signals from the means 1 or 2 of detection with a transmitter (Fig, 13).

b) a conclusion about the movement of the intruder in one of the directions: AB, AC, DC, CA, VA, CD, DB, BD when the corresponding sequence of signals from the receiver 3 signals is received on the resolver 6 when the detection means 1 and 2 are triggered with the transmitter and when values of the accumulation time of incoming signals (Δt), counted by the timer 5, the minimum accumulation time of incoming signals (T) (Fig, 13).

c) a conclusion about the movement of the intruder in one of the directions: AD, DA, BC, NE when the corresponding sequence of signals from the receiver 3 signals is received on the resolving device 6 when the means of detection 1 or 2 are activated with the transmitter and 5 time intervals Δt _1-2 registered by the timer and Δt _2-3 (Fig. 8.13).

4. Resetting the timer 5 by the timer control device 4. The output on the direction of movement of the intruder on the monitor 7 (Fig.13).

The invention is illustrated graphic materials, where:

- figure 1 presents a deployment diagram of the extended linear parts of two detection means in the known method of signaling cover for a road intersection and ways to bypass it with examples of directions of movement of the intruder;

- figure 2 is a diagram of the deployment of extended linear parts of two detection means in the known method of signaling cover of a road intersection and ways to bypass it with examples of directions of movement of an intruder through an intersection;

- figure 3 is a decision table (withdrawal algorithm) about the direction of the offender at the intersection for a known method of signaling cover for an intersection and ways to bypass it with the deployment of extended linear parts of two detection means;

- figure 4 is a deployment diagram of four extended linear parts of the detection means in the known method of signaling cover of a road intersection and ways to bypass it;

- figure 5 is a diagram of the deployment of long linear parts of the detection means in the proposed method of signaling cover for a road intersection and ways to bypass it;

- Fig.6 is a diagram of a road intersection with the distances marked on it from the intersection points of extended linear parts to the center of the intersection;

- Fig. 7 is a diagram of the deployment of extended linear parts of the detection means of the proposed method for signaling cover of a road intersection and ways to bypass it with examples of directions of movement of the intruder;

- Fig. 8 is a decision table (withdrawal algorithm) about the direction of movement of the intruder at the crossroads;

- Fig.9 is a table of ranges of speeds of the intruder in different areas;

- figure 10 is a summary table of some averaged tactical and technical indicators of detection tools and the recommended geometric dimensions of the alarm line;

- 11 is a diagram of the boundaries of the detection zone of the detection means deployed at the intersection;

- Fig - deployment scheme of detection tools and their extended linear parts with the designation of the main dimensions (distances);

- Fig - structural diagram of the collection, processing and display of information over the air.

The technical result consists in increasing the probability of detection (detection of an intruder when he moves in all directions) and the accuracy of indicating the direction of movement of the intruder (all directions of movement are determined) with signaling cover for a road intersection and ways to avoid it using only two COs.

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. 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. 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.

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

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

Claims (1)

The method of signaling cover for a crossroads and ways around it, which consists of deploying two detection means with an extended linear part at a four-way intersection and adjacent terrain, issuing alarms with detection means, analyzing the number of these signals and their sequence, characterized in that the extended linear part of each means crosses two different roads, one - two times, the other - once, with the ratio between the distances from the center of the intersection to the intersection points 1: 2: 1, at Ohm, an output algorithm is used that determines the direction of movement in a sequence of one to four alarms received from the detection means for a set time of their accumulation, and the ratio of the time intervals of the delay between the receipt of signals.

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