RU2519046C2 - Method of determining point of intrusion of signalling boundary - Google Patents

Abstract

FIELD: physics; control.

SUBSTANCE: invention relates to methods for remote monitoring of an area and can be used in detection means with an extended detachable linear part. The technical result is higher accuracy of determining a point of intrusion of a signalling boundary. The method involves deploying an extended detachable linear part of two detection means as a single signalling boundary, followed by determination of the area of intrusion of the signalling boundary by recording the interval of delay between successive arrivals of alarm signals and association thereof with one of three non-overlapping ranges of time intervals defined by geometric dimensions of the boundary and the range of possible velocities of the intruder. The method includes a preparatory step of deploying an extended detachable linear part of two detection means when constructing a signalling boundary, arbitrarily broken down into three areas, and with a configuration which provides a three-fold difference in the ratio of distances between extended detachable linear parts on neighbouring areas, and a main step which begins from the moment the intruder crosses the signalling boundary. The main step includes recording the time interval of delay between successive arrivals of alarm signals from the detection means and determining the area of intrusion using an algorithm which compares the obtained time interval with three non-overlapping ranges of time intervals calculated analytically for each of the areas, taking into account the possible range of velocities of the intruder on said location and individual distances between extended detachable linear parts on said areas.

EFFECT: three-fold increase accuracy of indicating a point of intrusion of a signalling boundary using only three detection means without deploying additional detection means.

10 dwg

Description

The invention relates to methods for remote security monitoring of the area and can be used in cases of using detection tools (CO) with an extended discontinuous linear part (LFF).

To increase the likelihood of detecting an intruder, COs with POCL are widely used, which make it possible to control terrain stretches up to 1-1.5 km [1-3]. With such a significant extent of the guarded line, the success of the detention of the offender depends not only on his detection on the ground, but also on the accuracy of indicating the location of the violation. However, for COs with POLP, the minimum possible accuracy of indicating the location of the violation is the entire length of the deployed POLP. Therefore, when an alarm signal is received from the CO, it is necessary to check the entire LPC before finding the place of the cliff [2, 3].

There is a method of determining the location of the violation of the signaling line, which consists in deploying one WITH the entire length of the line of protection and parallel to it at a distance of up to several tens of meters of additional WITH in each of the sections (Fig.1, 2) [2]. The area of violation is determined by the numbers of the CO that issued the alarm. As a rule, the line is divided into two or three sections, so the total number of deployed detection tools is three or four (Figs. 1, 2).

The disadvantage of this method is the need to deploy additional CO in each of the sections of the signal line.

The aim of the invention is to improve the accuracy of determining the place of violation of the signal line.

To achieve this goal, a method has been developed to determine the place of violation of the signaling line, which consists in determining the area of violation of the signaling line by registering the time interval of the delay between the successive receipt of alarms and the subsequent establishment of its belonging to one of three disjoint ranges of time intervals determined by the geometric dimensions of the line and range of possible speeds of the intruder.

The walking intruder moves at a speed the limits of which depend on terrain conditions (Fig. 3). 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]:

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

The intersection angle of the signaling line breaker (ω) lies within ± 45 ° of the perpendicular intersection (Fig. 4). The speed limits of the intruder and the angle of intersection of the signaling line are practically determined, known and confirmed on the basis of statistical studies [4-6].

Given these parameters of the intruder’s movement when deploying the LOC of two COs, the signal line formed by them is divided into three conventional sections (“A”, “B”, “C”) so that the distances between the COL of the first CO deployed in line and the COL of the second WITH, deployed in a stepwise structure, from site to site varied in jumps (figure 5). The length of each section is one third of the entire length of the line. When the violator crosses the alarm line, the area on which the violation occurred is determined by the value of the measured time interval of the delay between the receipt of alarms from the CO (Fig.6):

$$\{\begin{array}{c}\Delta t_A\in (t{(A)}_{\min },t{(A)}_{\max })\\ \Delta t_B\in (t{(B)}_{\min },t{(B)}_{\max })\\ \Delta t_C\in (t{(C)}_{\min },t{(C)}_{\max })\\ {\text{(V}}_{\text{min}}{\text{-V}}_{\text{max}}\text{) -const}\end{array}\text{(2)}$$

where t (A) _min , t (B) _min , t (C) _min is the minimum possible time spent by the intruder to overcome section “A”, “B” and “C”, respectively, s;

_{t (A) max, t (} B) max, t (C) max - maximum possible time required to overcome the violator portion "A», «B» and "C" respectively, with;

Δt _A , Δt _B , Δt _C - time intervals of the delay between the receipt of alarms for sections "A", "B" and "C", respectively, s.

The parameters of the signaling line are calculated from the condition that the minimum possible time spent by the intruder to overcome the greater individual distance between the VLC of one section exceeds the maximum possible time spent to overcome the smaller individual distance between the VLC of the neighboring section (Fig. 7):

$$\{\begin{array}{c}t{(B)}_{\min }>t{(A)}_{\max }\\ \Delta S_B>\Delta S_A\end{array}\cap \{\begin{array}{c}t{(C)}_{\min }>t{(B)}_{\max }\\ \Delta S_C>\Delta S_B\end{array}\text{, (3)}$$

where ΔS _A , ΔS _B , ΔS _C are the individual distances between the LFF in the sections, m

Non-intersection of these time intervals of the delay between the receipt of alarms from the CO, taking into account the possible range of speeds of the intruder and their crossing the boundary at an angle (ω), is subject to [7]:

$$\{\begin{array}{c}\frac{\Delta S_B\cdot \cos \omega \cdot V_{\min }}{\Delta S_A\cdot V_{\max }}>\mathrm{one}\\ \Delta S_B>\Delta S_A\end{array}\cap \{\begin{array}{c}\frac{\Delta {\text{S}}_{\text{C}}\cdot \cos \omega \cdot V_{\min }}{\Delta S_B\cdot V_{\max }}>\mathrm{one}\\ \Delta S_C>\Delta S_B\end{array}\text{, (four)}$$

where ω is the angle of maximum deviation from the perpendicular direction of the border crossing by the intruder, deg .;

V _max , V _min - the upper and lower limits of the speeds of the intruder, m / s.

Taking into account the possible twofold excess of the maximum speed of the intruder (V _max ) over the minimum (V _min ) and the maximum angle of intersection of the signaling line (ω = + 45 °), the ratio of individual distances between the PLC of neighboring sections should be:

$$\frac{\Delta S_B}{\Delta S_A}=3\cap \frac{\Delta S_C}{\Delta S_B}=3.\text{(5)}$$

To eliminate the error in the determination of the signal reception, analysis and presentation of information on the sequence of signals from the CO, the distance between the two PLCs in section A (S _min ) should be two times the distance traveled by the intruder in one second [1, 3]:

$$\Delta S_A=S_{\min }=2\cdot V_{\max }\text{(6)}$$

Then the parameters of the alarm line are calculated (Fig.7):

$$\{\begin{array}{c}\Delta S_A=S_{\min }=2\cdot V_{\max }\\ S_B=3\cdot S_A\\ S_C=3\cdot S_B\\ \Delta L_A=L_B=L_C=L/3\end{array}\text{(7)}$$

where ΔL _A , ΔL _B , ΔL _C - the length of sections "A", "B" and "C", respectively, m;

L is the total length of the signal line, m

Given the maximum possible speed of the intruder in a particular area, the parameters of the signaling line can have the values indicated in the table (Fig. 8). The limit values of the time interval t (N) _min and t (N) _{max of the} delay between the receipt of alarms by which the violated sections are determined are calculated taking into account the individual distances between the PLCs in the sections ΔS _A , ΔS _B and ΔS _C , the upper and lower speeds (V _min , V _max ) of the intruder in a particular area and possible angles (ω) of crossing the signal line [7]:

$$\{\begin{array}{c}t{(N)}_{\max }=\frac{\Delta S_N}{\sin {45}^o\cdot V_{\min }}\\ t{(N)}_{\min }=\frac{\Delta S_N}{V_{\max }}\end{array}\text{(8)}$$

For section "A" the limit values of the time interval of the delay between the receipt of alarms are calculated by the formula (Fig.6):

$$\{\begin{array}{c}t{(A)}_{\max }=\frac{\Delta S_A}{0.707\cdot V_{\max }}\\ t{(A)}_{\min }=\frac{\Delta S_A}{V_{\max }}\end{array}\text{(9)}$$

For section "B" the limit values of the time interval of the delay between the receipt of alarms are calculated by the formula

$$\{\begin{array}{c}t{(B)}_{\max }=\frac{\Delta S_B}{0.707\cdot V_{\max }}\\ t{(B)}_{\min }=\frac{\Delta S_B}{V_{\max }}\end{array}\text{(10)}$$

For section "C" the limit values of the time interval of the delay between the receipt of alarms are calculated by the formula

$$\{\begin{array}{c}t{(C)}_{\max }=\frac{\Delta S_C}{0.707\cdot V_{\max }}\\ t{(C)}_{\min }=\frac{\Delta S_C}{V_{\max }}\end{array}\text{(eleven)}$$

The intruder can not always violate the signaling line within the same area (Fig.9). So, he can cross the LSP number 2 at the border of sections A and B (ΔS _AB ) or B and C (ΔS _BC ) (Fig.7). Then the measured time intervals of the delay may lie within:

$$\{\begin{array}{c}\Delta t_{AB}\in (t{(A)}_{\max },{\text{t (B)}}_{\text{min}}\text{)}\\ \Delta t_{BC}\in (t{(B)}_{\max },{\text{t (C)}}_{\text{min}}\text{)}\end{array}\text{(12)}$$

In this case, when checking the LFF, it is necessary to inspect ΔS _AB ΔS _BC (Fig. 6, paragraphs 4, 5).

The intruder can cross the LSP number 2 at the border of sections A and B or B and C, while the measured delay time intervals can lie within the limits belonging to these sections (Δt _A , Δt _B , Δt _C ). It is therefore necessary to examine not only the region A (ΔL _A) when checking Poltja, B (ΔL _B), C (ΔL _C), but ΔS _AB or ΔS _BC (6, paragraphs 1-3).

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 speeds of movement of the intruder, taking into account the terrain (Fig.3).

2. The calculation of the parameters of the boundary by the formula (7) (Fig.7, 8).

3. The deployment on the ground across the direction of movement of the intruder VLPF two CO with transmitters, equipment for receiving signals from the CO, analysis and presentation of information (APAPI) (Fig.5, 7, 9).

4. The construction of the decision table on the site on which the violation occurred, formulas (9-11) (Fig.6).

The main stage begins when the intruder crosses the signal line and includes the following.

1. Registration of an alarm from CO No. 1 (No. 2), its transmission to APAPI and the beginning of the countdown of the time interval At by a timer (Fig. 10).

2. Registration of an alarm from CO No. 2 (No. 1), its transmission to APAPI, stopping the timer and determining the time interval Δt of the delay between the receipt of alarms.

3. Determination by APAPI of the place of violation of the signaling line according to the obtained time interval At in accordance with the decision table on the site where the violation occurred (Fig.6) (formulas 9-12).

4. Checking the area of the signaling line in accordance with the decision table on the area in which the violation occurred (Fig.6).

The invention is illustrated graphic materials, where

- figure 1 presents a diagram of a known method for determining the location of violation of the signaling line using three WITH;

- figure 2 - diagram of a known method for determining the location of violation of the signaling line using four WITH;

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

- figure 4 is a diagram of a possible sector of movement of the intruder when crossing the signal line;

- figure 5 is a diagram explaining the proposed method for determining the location of violation of the signaling line;

6 is a decision table on the site in which the violation occurred;

- Fig.7 is a diagram of the signaling line for three sections;

- Fig.8 is a table of options for the values of the parameters of the alarm line;

- Fig.9 is a diagram showing the possible movement of the intruder with the intersection of the LSP number 2 at the border of the sites;

- figure 10 is a structural diagram of the collection, analysis and display of information over the air.

The technical result consists in increasing the accuracy of indicating the place of violation of the signaling line by 3 times using only two detection means with an extended breakaway linear part without deploying additional detection means.

LIST OF USED LITERATURE

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

2. Korshnyakov V.G. Signaling means of protection of local areas: Uch. allowance. - 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 PS. - Penza, 2003 .-- 19 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.

6. Shumov VV The use of mathematical methods and models to substantiate decisions on the protection of the state border: Scientific-practical. allowance. - Part 2. - M .: Education, 1996. - 196 p.

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

Claims (1)

The method for determining the location of the violation of the signaling line, which consists in monitoring the area with several detection tools with an extended breakaway linear part, characterized in that when constructively performing the signaling line, only two detection tools are used, while it is divided into three conventional sections so that the distances between the linear part the first detection means deployed in a line and the linear part of the second detection means deployed in a stepped structure, from one hour one another changed abruptly with a three-fold increase, the violation section itself is determined by an algorithm that establishes that the received time interval of the delay between the successive receipt of alarms from the detection means belongs to one of the three disjoint ranges of time intervals calculated analytically for each of the sections, with 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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