RU2554530C1 - Method to detect traffic rules breaker and to define direction of its motion at road crossing and bypasses and detours - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention can be used at application of detectors with long linear part composed of flexible cable running on wire-wave or vibration principle for warning coverage of four-way crossings and their detours. Proposed method consists in fitting two detectors with long flexible cables at four-way road crossing so that flexible cable of every detector crosses of one of the roads ad a distance from the crossing centre equal to threefold width of detector detection zone. Note here that its definite length section is located nearby along the other road to cover it by its detection zone at the ratio between detection zone width and section length making 1:3:22.5. Algorithm is used to define the breaker motion direction by quantity, order and relationship between alarm signals duration.

EFFECT: higher probability of rules breaker detection and accurate determination of direction of its motion.

11 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) in the form of a flexible cable, built on a wire-wave or vibration detection principle, for signaling cover of four-way intersections of roads and tracks bypassing 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 wire-wave or vibration detection principle are widely used for this [1-3].

There is a method of detecting an intruder and determining the direction of his movement at the crossroads and ways to bypass it using detection tools, which consists in deploying two COs at the intersection and subsequent analytical conclusion about the direction of movement of the intruder in sequence and CO numbers that issued alarms (Fig. 1, 2) [2, 3].

The disadvantages of this method are the low probability of detection and the 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 determined unambiguously, ten - in two groups of five, and when the offender moves in two directions, he is not detected at all (figure 2).

There is also a known method of detecting an intruder and determining the direction of his movement at a crossroads, in which four SDs are deployed to increase the likelihood of detecting an intruder and the accuracy of indicating his direction of movement [2, 3]. The disadvantage of this method is the use of a significant number of CO (figure 3).

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

To achieve this goal, a method has been developed for detecting an intruder and determining the direction of his movement at the intersection of roads and ways to bypass it, consisting in deploying at the four-way intersection and adjacent terrain two detection means with an extended linear part so that the PLC of each detection means has one of crossed roads across at a distance from the center of the intersection, equal to three times the width of the detection zone of the CO itself, with a section of a certain length edstvennoy proximity along another road, covering it with its detection area, and applying an algorithm that determines the direction of movement of the intruder by the number, sequence and relative Incoming between durations alarms. The ratio of the width of the CO detection zone to the lengths of the sections is 1: 3: 22.5 (Figs. 4, 5).

Passing the intersection, the intruder twice enters the zone of detection of CO (Fig.6). If the speed of the intruder varies insignificantly, the place of violation can be determined by the duration of the alarm (the time spent by the CO in the alarm mode). So, if the intruder crosses the PLC lying across the road, then the duration of the alarm will be less than the duration of the signal when the intruder moves along a section of the road along which the PLC is deployed. By the sequence of triggered CO and the relationship between the durations of the first and second alarms, you can determine the direction of movement of the intruder at the intersection. If the intruder moves around the intersection of roads to the right or left, then only one alarm signal is received (Fig.6).

The walking intruder moves at a speed the limits of which depend on terrain conditions (Fig. 7). 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. 7).

where V _MAX - the maximum possible speed of the offender through the intersection, m / s;

V _MIN - the minimum possible speed of the intruder through the intersection, m / s.

It is possible to determine the places of violations (the place where the PLC lies across the road, or the place where the PLC lies along it) if you analyze the relationship between the durations of alarms. At the same time, in order to eliminate the error in the conclusion due to the uneven speed of movement of the intruder, the following is necessary:

1) the minimum duration of the alarm when the intruder moves along the road along which the PLC СО2 (B′B ″) is deployed must exceed the maximum duration of the alarm signal when the intruder crosses one of the two sections of the PLC lying across the road (Figs. 5, 8) :

where (t _H1 ) _MAX is the maximum duration of the alarm when the intruder crosses the section of the PLC СО1 lying across the road, s;

(t _H2 ) _MAX - the maximum duration of the alarm when the intruder crosses the section of the PLC CO2 lying across the road, s;

(t _ΔL2 ) _MIN - minimum duration of the alarm signal when the intruder moves along a section of the road along which the PLC СО2 (B′B ″) is deployed, s;

2) the minimum duration of an alarm when an intruder moves along a section of road along which a PLC СО1 (D′D ″) is deployed, must exceed the maximum duration of an alarm signal when an intruder moves along a section of road along which a PLC СО2 (B′B ″) is deployed ( 5, 8):

where (t _ΔL1 ) _MIN is the minimum duration of the alarm signal when the intruder moves along a section of the road along which the PLC СО1 (D′D ″) is deployed, s.

The maximum value of the duration of the alarm signal when the intruder crosses sections of the PLC СО1 and СО2 lying across the road depends on the width of the CO detection zone, the time it was put into standby mode and the minimum possible speed of the intruder (Figs. 4, 7, 9):

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

H is the width of the CO detection zone, m (FIG. 4).

The minimum value of the alarm duration when an intruder moves along a section of the road along which the PLC is deployed depends on the length of the PLC portion lying along the road, the time the CO is in standby mode and the maximum possible speed of the intruder, therefore, for CO2:

where ΔL2 is the length of the plot of the PLC СО2 lying along the road (B′B ″), m.

For CO2:

where ΔL1 is the length of the smallest of the two sections of the PLC lying along the road (B′B ″), m.

The maximum value of the duration of the alarm signal when the intruder moves along the section of road along which the PLC is deployed depends on the length of the PLC section lying along the road, the time it takes for the CO to enter standby mode and the minimum possible speed of the intruder:

Therefore, in order to fulfill condition (2), it is necessary that the length of the PLC of CO2 lying along the road (B′B ″) is:

Given that the maximum possible speed of the intruder at the intersection does not exceed the minimum possible more than 1.5 times (1):

When this condition is met, even with an uneven speed of movement 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 across (1-2) (Fig. 8).

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

t _ΔL2 is the duration of the received alarm when the intruder moves along a section of the road along which the PLC CO2 lies, s;

When the intruder moves, when he crosses only sections of the PLC lying across the road (AC, CA directions), the duration of the alarm signals will not differ from each other by more than 1.5 times (Fig. 10).

where t _H1 is the duration of the alarm received from СО1 when the intruder crosses the PLC lying across the road, s;

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

The ratios of the durations of alarms in the sequences already considered are in the range of 0.67 ... 1.5 and 2 ... 4.5 (7-8). Therefore, so that the sequence of two signals received when the intruder suppresses the PLC lying across the road (AC, CA directions) can be distinguished from the sequence of signals received when the intruder moves along sections of the road where the PLC lies along them (DB, BD directions) , you must fulfill the conditions (Fig, 10):

where t _ΔL2 is the duration of the alarm received from CO2 when the intruder moves along a section of the road along which lies the PLC (B′B ″), s;

t _ΔL1 is the duration of the alarm received from СО1 when the intruder moves along a section of the road along which the PLC (D ″ D ′) lies, s.

To fulfill this condition, the following relationship is necessary between the lengths of the PLC sections lying along the roads (Figs. 5, 8):

where ΔL1 - the length of the plot PLC СО1, deployed along the road (D ″ D ′), m

If D ″ D ′ is expressed in terms of the width of the detection zone H, then

When this condition is met, when the intruder moves through one of the sections of the PLC deployed across the road, and along section D ″ D ′, the ratio between the durations of the alarm signals will be:

The removal of sections of the extended linear part A ″ A ′ and C ″ C ′ from the road, on the one hand, should be large enough to prevent the operation of CO when the intruder moves along the road opposite them, on the other hand, small enough to minimize the length of the PLC segments A ″ D ′ and C ″ B ′, and thus maximize the length of the PLC for the signal cover of the intersection. The specific value of the removal is determined by the width of the CO detection zone (FIGS. 4, 9):

where S is the symbol for the removal of sections of the PLC A ″ A ′, C ″ C ′ from the road;

OA ′, OC ′ - removal of PLC sections A ″ A ′, C ″ C ′ from the road, m.

For various COs, the width of the detection zone can be tens of meters (Fig. 9).

The sections of the extended linear part D ″ D ′, B ″ B ′ must lie in the immediate vicinity of the road along which they are turned, so that the moving intruder is constantly in the detection zone of the CO (Fig. 4) The intruder can move through the intersection ( two alarms), and bypassing the intersection (one alarm) (6, 10), therefore, it is necessary to determine the maximum accumulation time of incoming signals. It depends on the maximum possible distance that the intruder can go through the intersection from the moment the first signal arrives until the second one arrives. This is the distance between two sections of the PLC lying along the road, D ″ B ′ when the intruder moves in the DB direction (Fig. 5).

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

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

The lengths of sections A ″ A ′ and C′C ″ are determined based on the residual length of the PLC (figure 5):

where L1 and L2 are the total lengths of the deployed PLCs СО1 and СО2, m.

The method includes two stages: preparatory and main.

Preparatory stage

1. The deployment of detection tools 1 and 2 with a transmitter, taking into account the recommended parameters of the signaling line ΔL1, ΔL2, S and others (Figs. 4, 5, 19), formulas (9, 14, 16, 18).

2. The deployment on the ground of the equipment for receiving signals, analysis and presentation of information, including a receiver 3 of signals, a device 4 for controlling a timer 5, a timer 5, a resolving device 6 and a monitor 7 (Fig. 11).

3. Determination of the minimum accumulation time of incoming signals T (17).

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 decisive device 6 (Fig.10).

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 crossroads or bypasses him and falls into the detection zone of one of the CO and includes:

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, starts the timer 5 by the timer control device 4, starts counting the duration of the alarm signal, the accumulation time of incoming signals Δt and recording the number of the triggered means detection in the solving device 6 (Fig.11).

2. Record in the solver 6 the duration of the first alarm after it ends. The receiver 3 registers a possible second alarm and determines its duration by timer 5. Stop the timer 5 if the accumulation time of the signals (Δt) reaches the minimum accumulation time of incoming signals (T) and the second alarm does not arrive or if the second signal ends anxiety. Comparison by the deciding device 6 of the number and sequence of triggered detection means 1 or 2 with the transmitter, the relationship between the durations of alarms with those available in the decision table (output algorithm) about the direction of movement of the intruder (Fig. 10).

3. The formation of one of the conclusions about the direction of movement of the intruder by the decisive device 6, depending on the received data used for analysis (figure 10):

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 of incoming signals (Δt) is reached, counted by timer 5, the minimum accumulation of incoming signals (T) and the second signal is not received during this time to the receiver 3 signals from means 1 or 2 of detection with a transmitter (figure 10);

b) a conclusion about the movement of the intruder in one of the directions (AB, AC, DC, CA, BA, CD, DB, BD, AD, DA, BC, CB) upon receipt of the corresponding sequence of triggered detection means 1 or 2 with the transmitter and the duration of the alarms from them for the time (Δt) of the accumulation of incoming signals, counted by the timer 5, less than the minimum accumulation time of the incoming signals (T) (figure 10).

4. Resetting the timer 5 by the timer control device 4. The output of the direction of movement of the intruder on the monitor 7 (11).

The invention is illustrated graphic materials, where:

- figure 1 presents a deployment diagram of two detection tools in a method for detecting an intruder and determining the direction of his movement at a crossroads and ways to bypass it with examples of directions of movement of an intruder through an intersection [2, 3];

- figure 2 - decision table (withdrawal algorithm) about the direction of the offender at the crossroads for the method of detecting the offender and determine the direction of his movement at the crossroads and ways to bypass it [2, 3];

- figure 3 is a diagram in a method of detecting an intruder and determining the direction of his movement at a crossroads and ways to bypass it with the deployment of four detection tools [2, 3];

- figure 4 is a diagram of the boundaries of the detection zone of the detection means deployed at the intersection;

- figure 5 is a diagram of the deployment of long linear parts of the detection means in the proposed method for detecting the intruder and determining the direction of his movement at the crossroads and ways to bypass it;

- Fig.6 is a diagram of the deployment of long linear parts of the detection means in the proposed method for detecting an intruder and determining the direction of his movement at the crossroads and ways to bypass it with examples of directions of movement of the intruder;

- Fig.7 is a table of ranges of speeds of the intruder in various parts of the terrain;

- Fig. 8 is a table showing the relationship between the durations of alarms on the values of the relations between the width of the detection zone and the lengths of stretched linear parts lying along the roads;

- Fig.9 is a summary table of some averaged tactical and technical indicators of detection tools and the recommended geometric dimensions of the signal line;

- figure 10 is a decision table (withdrawal algorithm) about the direction of movement of the intruder at the crossroads;

- 11 is a structural diagram of the collection, processing and display of information over the air.

The technical result consists in increasing the likelihood of detection and accuracy of indicating the direction of movement of the intruder in the signal cover of the intersection and ways to get around it with two COs.

Information sources

1. Magauenov R.G. Burglar alarm systems: the basics of theory and construction principles: study. The 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 s.

Claims (1)

The method of detecting the intruder and determining the direction of his movement at the intersection of roads and ways to bypass it, which consists in deploying at the four-way intersection of the roads and adjacent terrain two means of detection with an extended linear part, issuing alarms with detection tools, using an algorithm that determines the direction of movement by the number and the sequence of receipt of these signals, characterized in that the extended linear part of each detection means crosses one of the roads across Alenia from the center of the intersection, equal to three times the width of the detection zone of the detection tool itself, lies in a certain length in a close proximity along another road, covering it with its detection zone, the ratio of the width of the detection zone of the detection tool to the lengths of the sections is 1: 3: 22.5, and in the algorithm that determines the direction of movement of the intruder, the relationship between the durations of alarms is additionally taken into account.

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