RU2517687C1 - Method of determining direction of movement of offender - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention can be used in cases where detection means with an extended detachable linear part are used at a location which intersects with a road (highway) network where the speed range of an offender is known. The method involves deploying on a local area of the location of a signalling boundary with given geometric dimensions, which includes two detection means with an extended detachable linear part, followed by determining the direction of movement using an algorithm which establishes the identity of the obtained delay time interval between successive arrival of alarm signals from the detection means to one of three ranges of time intervals, calculated analytically for each direction of movement, taking into account the possible speed range of the offender at the given location and individual distances between detachable linear parts on said areas.

EFFECT: determining direction without deploying additional detection means.

14 dwg

Description

The invention relates to methods for remote security monitoring of the area and can be used in cases where detection means (CO) are used with an extended discontinuous linear part (VLC) on an area crossed by a network of roads, the range of speeds of which the violator is known [1, 2].

To increase the likelihood of detecting an intruder, widely used COs with PFL are used to control areas of the terrain up to 1-1.5 km wide. In many respects, the success of the detention of the offender depends not only on his detection on the ground, but also on determining the direction of his movement.

There is a method of determining the side on which the intruder moves, consisting in the deployment of two CO, the linear parts of which are parallel to each other and are at a distance of 25-40 meters (figure 1). The party to which the intruder moves is determined by the order of receipt of alarms from the CO. To determine the direction of movement of the intruder, it is required to deploy more than two SSs on the ground [2, 3]. So, there is a known method of determining the direction of movement of an intruder, which consists in deploying a CO that controls the entire border of protection, and additional CO on each road (trail) passing through the terrain (Fig. 2). The direction of movement (road, trail) is determined by the sequence and numbers of COs that issued an alarm.

The disadvantage of this method is the need to deploy additional RM in every possible direction of movement (roads, trails).

The aim of the invention is to determine the direction of movement of the intruder with two COs with HALF without the deployment of additional CO.

To achieve this goal, a method has been developed to determine the direction of movement of the intruder, which consists in deploying an alarm line with a given geometric dimensions in a local area, including two COs with an EFF, followed by determining the direction of movement according to an algorithm that establishes the membership of the received time delay interval between the successive receipt of alarms from detection tools to one of three ranges of time intervals calculated analytically For each of the directions of movement, taking into account potential intruder speed range of the area and the distances between the individual linear parts breakage in these areas.

The invention is illustrated graphic materials, where:

- figure 1 presents a diagram of a known method for determining the side in which the intruder moves;

- figure 2 - diagram of a known method for determining the direction of movement of the intruder;

- figure 3 is a table of ranges of speeds of the intruder in various areas of the terrain;

- figure 4 is a graph of the function of the time interval of the delay in the receipt of alarms from the detection means in a particular direction;

- figure 5 is a diagram of the deployment of the signal line on the ground with remote control of three roads;

- 6 is a diagram of the deployment of the signal line on the ground with remote control of two roads;

- Fig.7 is a diagram of the signaling line with the remote control of three roads;

- Fig. 8 is a diagram of a signaling line at remote monitoring of two roads;

- Fig.9 - graphs of the functions of the time interval of the delay in the receipt of an alarm signal from the selected direction of movement of the intruder for three roads;

- figure 10 - graphs of the functions of the time interval of the delay of the alarm signal from the selected direction of movement of the intruder for two roads;

- 11 is a decision table on the direction of movement of the intruder with equipment for analysis and presentation of information;

- Fig - an example of determining the direction of movement according to the schedule;

- Fig.13 is a table of options for the values of the parameters of the alarm line;

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

The method includes two stages: preparatory and main.

Preparatory stage:

1. The choice of site for the deployment of CO, the determination of the possible limits of the speed of movement of the intruder (Fig.3, 5, 6).

2. The calculation of the parameters of the line, taking into account the number of controlled roads (paths) (Fig.7, 8, 13).

3. Deployment on the terrain of the LPC of two COs with transmitters (Figs. 8, 9).

4. Drawing an alarm line on the scheme (map) of the area.

5. Calculation of parameters and construction of graphs of the relationship between the direction of movement of the intruder and the time intervals of the delay of receipt of signals from the CO (Fig.9, 10).

The main stage begins when the intruder crosses the signal line and includes (figure 3):

1. The registration of the alarm signal from CO No. 1 (No. 2), its transmission to the equipment for analysis and presentation of information, and the start of the timer by the timer (Fig. 14).

2. Registration of an alarm signal from SO No. 2 (No. 1), its transmission to the equipment for analysis and presentation of information, stopping the timer and determining the time interval of the delay between the receipt of signals (Δt) (Fig. 14).

3. Determination by the equipment of analysis and presentation of information on the obtained time interval At and the sequence of operation of the CO on the direction of movement of the intruder (11, 12).

The walking intruder moves at a speed the limits of which depend on terrain conditions (Fig. 3). The limits of these speeds are practically determined, known and confirmed on the basis of experimental studies [4-6]. The ratio of the upper value of the speed (V _max ) to the lower (V _min ) lies in the range of 1.5 ... 2.0 [4-6]:

$$\frac{V_{\max }}{V_{\min }}\le \mathrm{1,5}-2\left(\mathrm{one}\right)$$

Thus, a specific distance S intruder can go for a certain time interval (Δt _s ), limited by the maximum (t _max ) and minimum (t _min ) values:

$$\Delta t_S\in \left(t_{\min },t_{\max }\right)\left(2\right)$$

The limit values of the time intervals are found by the formula:

$$\{\begin{array}{l}{t}_{\min }=\frac{\Delta S_N}{V_{\max }}\\ t_{\max }=\frac{\Delta S_N}{V_{\min }}\end{array}\left(\text{3}\right)$$

where t _min , t _max - the minimum and maximum values of the time intervals spent by the intruder when crossing the signaling line in the direction N, s;

ΔS _N - the depth of the boundary in the N direction, m

Currently, fuzzy inference technology is widely used in technology [7]. Following it, the considered time interval can be represented graphically in the form of a trapezoidal function, which shows that a specific distance S _N intruder can pass for a certain period of time, which has a lower value (b) (at maximum speed V _max ) and upper value (with ) (at minimum speed V _min ). Within these limits, the confidence in the reliability of the conclusion (µ) that the distance S _N could be covered is maximum and equal to unity. With smaller (from (a) to (b)) or large (from (c) to (d)) values of time, confidence in the reliability of the conclusion (µ) that the distance S _{N has} been traveled is less than unity (Fig. 4) [ 7].

As a rule, no more than 2-3 roads (paths) can pass through a strip of land with a width of 1-1.5 km [4], therefore, cases are considered for remote monitoring of two and three directions of movement (roads) on the terrain. The signal line of protection from the linear parts of two SS is deployed across the possible directions of movement of the intruder. The geometric dimensions of the signal line are set so that the ratio of time intervals between the violation of the first and second linear parts (Δt) is different and depends on the specific direction of movement (Fig.5, 6) [8]:

$$\{\begin{array}{l}\Delta S_C>\Delta S_B>\Delta S_A\\ \Delta t_{A\max }<\Delta t_{B\min }\\ \Delta t_{B\max }<\Delta t_{C\min }\\ V_{\max },V_{\min }-const,\left(\mathrm{four}\right)\end{array}$$

where S _A , S _B , S _C are the distances traveled by the intruder with linear parts No. 1 and No. 2 when moving in the direction of OA (AO), OV (VO), OS (SO), m;

Δt _A , Δt _B , Δt _c - time intervals for the delay of receipt of signals from CO when the intruder moves in one of the indicated directions, max is the maximum value, min is the minimum, s;

V _max , V _min - the maximum and minimum value of the speeds of the intruder, m / s.

Knowing the ratio of the distances between adjacent linear parts along the entire length of the alarm line of protection, comparing them with the ratio of the measured time intervals and taking into account the sequence of operation of the CO, the direction of movement is determined.

So that the time intervals Δt _A , Δt _B , Δt _c do not overlap with the possible movement of the intruder at the maximum speeds, the parameters of the signaling line are set so that the ratio of the distances traveled by the intruder in the nearby directions is greater than the ratio of the upper and lower limits of his speeds:

$$\{\begin{array}{l}\frac{S_B}{S_A}\ge \frac{V_{\max }}{V_{\min }}\\ \frac{S_C}{S_B}\ge \frac{V_{\max }}{V_{\min }}\end{array}\left(5\right)$$

Given the fact that the ratio of the upper speed value (V _max ) to the lower (V _min ) lies in the range of 1.5 ... 2.0 (see formula 1):

$$\{\begin{array}{l}\frac{S_B}{S_A}\ge 3\\ \frac{S_C}{S_B}\ge 3\end{array}\left(6\right)$$

To fulfill this condition, the second linear part has a piecewise linear structure (Fig.7, 8). The parameters of the alarm line when covering three roads (paths) are calculated by the formula:

$$\{\begin{array}{c}L=900-1500m\\ \alpha =2^{\circ }\cup 3^{\circ }\\ S_{\min }=5m\\ S_{\max }=S_{\min }+tg\alpha *\frac{\mathrm{<figure-callout\; id="3"\; label="L"\; filenames="00000025.png"\; state="\{\{state\}\}">L</figure-callout>}}{3}+\mathrm{<figure-callout\; id="3"\; label="t\; g"\; filenames="00000025.png"\; state="\{\{state\}\}">t\; </figure-callout>}g3\alpha *\frac{\mathrm{<figure-callout\; id="3"\; label="L"\; filenames="00000025.png"\; state="\{\{state\}\}">L</figure-callout>}}{3}+\mathrm{<figure-callout\; id="9"\; label="t\; g"\; filenames="00000025.png"\; state="\{\{state\}\}">t\; </figure-callout>}g9\alpha *\frac{L}{3}\end{array}\left(7\right)$$

where L is the length of the linear part, m;

α is the angle between the linear parts No. 1 and No. 2;

S _max , S _min - the maximum (minimum) distance between the linear parts along the perpendicular, respectively, m

The parameters of the alarm line when covering two roads (paths) are calculated by the formula:

$$\{\begin{array}{c}L=600-1500m\\ \alpha =2^{\circ }-6^{\circ }\\ S_{\min }=5m\\ S_{\max }=S_{\min }+tg\alpha *\frac{\mathrm{<figure-callout\; id="2"\; label="L"\; filenames="00000025.png"\; state="\{\{state\}\}">L</figure-callout>}}{2}+\mathrm{<figure-callout\; id="3"\; label="t\; g"\; filenames="00000025.png"\; state="\{\{state\}\}">t\; </figure-callout>}g3\alpha *\frac{L}{2}\end{array}\left(8\right)$$

The graph of the dependence of the time intervals of the delay on the particular selected direction of movement is a trapezoid (figure 4). Its numerical parameters a, b, c, d take real values and are calculated for the directions of motion OA (AO), OB (BO) and OS (CO), respectively (Figs. 9, 10).

The parameters of the schedule for the signal cover of three roads are calculated according to the formula [7]:

$$OA\left(AO\right)\{\begin{array}{l}a=\frac{S\min }{V\max }\\ b=\frac{S\left(A\right)}{V\max }\\ c=\frac{S\left(A\right)}{V\min }\\ d=\frac{S\left(B\right)}{V\max }\end{array},OB\left(BO\right)\{\begin{array}{l}a=\frac{S\left(A\right)}{V\min }\\ b=\frac{S\left(B\right)}{V\max }\\ c=\frac{S\left(B\right)}{V\min }\\ d=\frac{S\left(C\right)}{V\max }\end{array},OC\left(CO\right)\{\begin{array}{l}a=\frac{S\left(B\right)}{V\min }\\ b=\frac{S\left(C\right)}{V\max }\\ c=\frac{S\left(C\right)}{V\min }\\ d=\frac{S\max }{V\min }\end{array}\left(9\right)$$

where S (A), S (B), S (C) are the distances traveled by the intruder between the linear parts in a given direction, m

The parameters of the graph for the signal cover of two roads are calculated according to the formula [7]:

$$OA\left(AO\right)\{\begin{array}{l}a=\frac{S\min }{V\max }\\ b=\frac{S\left(A\right)}{V\max }\\ c=\frac{S\left(A\right)}{V\min }\\ d=\frac{S\left(B\right)}{V\max }\end{array},OB\left(BO\right)\{\begin{array}{l}a=\frac{S\left(A\right)}{V\min }\\ b=\frac{S\left(B\right)}{V\max }\\ c=\frac{S\left(B\right)}{V\min }\\ d=\frac{S\max }{V\min }\end{array}\left(10\right)$$

The entire considered time interval (ΔT) includes overcoming the signaling line at its borders (S _min , S _max ) (Fig. 7, 8):

$$\Delta T\in \left(T_{\min },T_{\max }\right)\left(\mathrm{eleven}\right)$$

The time limits are found by the formula:

$$\{\begin{array}{l}{T}_{\min }=\frac{S_{\min }}{V_{\max }}\\ T_{\max }=\frac{S_{\max }}{V_{\min }}\end{array}\left(12\right)$$

According to the order of receiving signals and the time interval of delays between them, expressed through a graph of the function of the dependence of the time interval of the delay of receipt of alarm signals from CO in a specific direction S (t), a conclusion is drawn about the direction of movement of the intruder. So, if two alarms from CO No. 1 and No. 2 with a delay interval Δt _{n are} received, it is necessary to postpone it along the abscissa axis and determine the direction of movement of the intruder through the intersection points with the function graphs.

Example No. 1. Alarms were received in the sequence of SO No. 1 and No. 2 with a time delay Δt ₂ . The measured time interval and the sequence of receipt of the signals correspond to the movement of the intruder in the direction of the OS, confidence in the reliability of the output (µ = 1) (11, 12).

If the intruder makes an attempt to drive off-road, the values of the time intervals will shift to the border of two adjacent graphs, which, of course, should be interpreted as an attempt to move between two neighboring roads.

Example No. 2. Alarms were received in the sequence of SO No. 2 and No. 1 with a time delay Δt ₂ . The measured time interval and the sequence of signal arrival correspond to the movement of the intruder in the direction between AO and VO, closer to the VO direction, confidence in the reliability of the output (µ is 0.7) than to the AO, confidence in the reliability of the output (µ is 0.3) ( 11, 12).

The technical result consists in determining the direction of movement of the intruder with only two detection means with an extended breakaway linear part without deploying additional detection means.

Information sources

1. Magauenov R.G. Burglar alarm systems: the basics of theory and construction principles: study. allowance / R.G. Magaenov. - 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. Alarm device of the breakaway type "Graphite": Passport and user manual USDP. 425112.001 Substation. - Penza, 2003 .-- 19 p.

4. Psarev A.A. Military topography: textbook / A.A. Psarev. - M .: Military Publishing House, 1986 .-- 384 p.

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

6. Shumov VV The use of mathematical methods and models to substantiate decisions on the protection of the state border: a scientific and practical manual. Part 2.1 V.V. Shumov. - M .: Education, 1996 .-- 196 p.

7. Leonenkov A.V. Fuzzy modeling in MATLAB and fuzzy TECH / A.V. Leonenkov. - SPb .: BHV - Petersburg, 2005 .-- 736 p.

8. Handbook of elementary mathematics / Ed. M.Ya. Vornovitsky. - M .: Nauka, 1964 .-- 420 p.

Claims (1)

The method of determining the direction of movement of the intruder, which consists in monitoring two or three roads (paths) with detection means with an extended breakaway linear part, characterized in that when constructively performing the guard line, the first linear part unfolds across the roads (paths) in a line, the second linear part is divided into two or three conventional sections and unfolds along a linear-piece structure so that each of the sections intersects one of the roads (paths), the angle of inclination of the second linear part to the first from section to section at tripled, the direction of movement itself is determined by an algorithm that establishes the belonging of the obtained time interval of the delay between the successive receipt of alarms from the detection means to one of the three ranges of time intervals calculated analytically for each of the directions of movement, taking into account the possible range of speeds of the intruder in a given area and individual distances between breakaway linear parts in these areas.

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