RU2690216C1 - Method of road security monitoring by linear radio wave detection means - Google Patents

Abstract

FIELD: monitoring systems.SUBSTANCE: invention relates to field security monitoring. Technical result is achieved due to road safety monitoring by linear radio wave detection means, along with alarm signals to information collection and processing system information is transmitted on threshold blocks of detection device, which registered useful signal, in an information collection and processing system, an algorithm is used which recognizes the detected intruder as a vehicle, if twice only information on a unit of a large threshold of the detector receiver is received, recognizing the detected intruder as a pedestrian if successively information on different units of the detector threshold of the detection means has been received, which determines the directions of movement of the foot intruder according to the order of arrival of information on blocks of the threshold of the detector receiver, taking into account the known deployment pattern of the detection means.EFFECT: recognizing the type of intruder detected at the bend and determining the direction of movement of the foot intruder using one detection means.1 cl, 8 dwg

Description

The invention relates to methods of security monitoring of the area and can be used in cases of signaling control of road bending with one linear radio wave detection (CO) tool, when recognition of the type of the detected intruder (vehicle or foot intruder) and determination of its direction is required.

Often the route of movement of the violator on the ground passes through the existing road network. [1] For its control, linear radio-wave detection means with an extended detection zone (AO) are widely used - from 50 to 200 meters. [2, 3] At the same time, in order to effectively accomplish the task of pre-empting actions and apprehending an intruder detected by a CO, it is important for response forces to have information about their type (vehicle or foot intruder) and direction of travel.

The most common element of the road network is the bend of the road (arcuate turn, curvature of the road - consisting of two adjacent straight sections of the road connected by a circular curve).

Closest to the proposed method is a known method of security monitoring using linear radio wave detection tools. [4] The method consists in controlling the bend of the road with one CO, in which the receiver (PFP) and transmitter (Tx) are turned from opposite sides of the bend point of the road so that the AF means crosses the road in two sections; the distance from the PFP to the site nearest to it did not exceed 10 meters; the distance from the Tx to the nearest section exceeded half of the Tx-Tx distance by no more than 10 meters; the differences in the cross-sectional areas of the first Fresnel zone in the areas: the cross-sectional area in the area closest to the PFP is at least two times smaller than the sectional area in the area closest to the CEP; generating an alarm PFP twice when an intruder moves through a bend in a road; PFP records of both levels of useful alarms for the entire duration of the alarm modes; application of the algorithm that determines the direction of movement of the offender: from the PRM to the PRD side or from the PRD to the PRM side by the value of the ratio of the useful signal level received by the first to the level of the useful signal received by the second (more than one or less than one); the establishment of the maximum value of the time of accumulation of alarms based on the minimum possible speed of the intruder and the distance traveled between the sections of the intersection of the detection zone with the road; the transfer of PFP CO to the system for collecting and processing information (SSOI) signal about the direction of movement of the offender.

There is another method of security monitoring with the use of linear radio wave detection tools, which consists in controlling the curvature of the road by two COs deployed on its adjacent roads; alternately generating alarms with time-delayed means and transmitting them at the SSOI when their intrusion detection zones intersect in succession; SSOI receiving two alarms and recording the delay between them; SSOI calculation of the speed of movement of the detected intruder based on the known distance between the sections of the intersection of the means of detection of the means with the roads and the time delay between the incoming alarms; using the recognition algorithm in SSOI of the type of an intruder detected on a road bend (vehicle or foot intruder) and determining its direction based on analyzing the order in which alarms are received from the means of detection and comparing the calculated speed with the values typical for the vehicle or the foot intruder (FIG . 12).

The first indicated method determines the direction of motion of the intruder detected at the bend, but does not recognize its type.

The second specified method recognizes the type of an intruder detected at the bend (vehicle or foot intruder) and determines the direction of its movement, but requires the use of two CO for its implementation.

The aim of the invention is to obtain the possibility of recognizing the type of the intruder detected at the bend of the road and determining the direction of movement of the foot intruder using one CO.

To achieve this goal, a method of security monitoring of the road with a linear radio wave detection tool has been developed. It consists in controlling the bend of the road with one CO, in which the PFP and the PWP are deployed from opposite sides of the bend point of the road so that 30 vehicles cross the road in two sections; the distance from the PFP to the site nearest to it did not exceed 10 meters; the distance from the Tx to the nearest section exceeded half of the Tx-Tx distance by no more than 10 meters; the differences in the cross-sectional areas of the first Fresnel zone in the areas: the cross-sectional area in the area closest to the PFP is at least two times smaller than the sectional area in the area closest to the CEP; the selection of the useful signal with a large modulation depth and a negative sign, which is registered by the unit of a large threshold of PFP at the intersection of the section 30 closest to the PFP violator of any type; the dependence of the sign and the modulation depth of the emitted useful signal and the blocks that register it when crossing the area of the DA, closest to the DRD, on the type of intruder: when crossing the site by the foot intruder, a useful signal with a small modulation depth and negative with positive signs is detected, which is registered by blocks of small and positive PFP thresholds means; when a vehicle crosses a site, a useful signal is allocated with a large modulation depth and a negative sign, which is registered by a block of a large threshold of PFP equipment; generating and transmitting PFPs at the SSOI when the intruder moves through the bend of the two alarms along with information about threshold blocks; the use of an algorithm in SSOI that recognizes the detected intruder as a vehicle if information only about a large threshold block has been received twice; recognizing the detected intruder as a pedestrian in the event that information has been received on different blocks of the threshold; determining the direction of movement of the foot intruder by the order of receipt of information about the threshold blocks, taking into account the known CO deployment pattern (Figs. 3, 4).

It is known that the parameters of the useful signal (sign and depth of modulation) emitted at the intersection of 30 by the intruder depend on the ratio of the sizes of the intruder (side projection area) to the size of the detection zone (sectional area) at its intersection, - degree of overlap by 30 offenders. Due to the fact that the AOR means has an ellipsoidal shape, its cross-sectional area is minimal near PFP (TX) (S ₁ ) and maximum in the middle (S ₂ ). Compared with a vehicle (S _CU ), it is always smaller, and in the case of a walking intruder (SV), its dimensions are smaller near PFP (DSP) and larger in the middle of the DA (Fig. 5): [5]

where S ₁ - the cross-sectional area of the detection zone near the PFP (PRD) means, m ²

S ₂ - the cross-sectional area of the detection zone in its middle, m ² ;

S _C - the area of the side projection of the foot violator, m ² ;

S _TS - the area of the side projection of the vehicle, m ² .

When the violator exceeds the sizes of the DZ sizes (the ratio is more than one - a significant degree of overlap) at the place of its intersection, the extracted useful signal has a greater modulation depth and a negative sign (Fig. 6). In the case when the dimensions of the DZ exceed the dimensions of the intruder (the ratio is significantly less than one - a small degree of overlap), the extracted useful signal has a small depth and a negative with positive signs (Fig. 7). [6]

The registration of the useful signal, depending on its parameters (sign and modulation depth), is carried out by different blocks of the PFP threshold level:

- a large threshold unit when the desired signal has a large modulation depth and a negative sign;

- blocks of small and positive thresholds, when the useful signal has a shallow depth and negative with positive signs.

Based on the expression (1), taking into account the deployment pattern of the AOR funds in the proposed method:

- when driving through the bend of a vehicle's road, its dimensions always exceed 30, regardless of where it intersects - the extracted useful signal always has a large modulation depth with a negative sign and is always recorded by a block of a large threshold for PRM means;

- when driving through the bend of the foot intruder and crossing the section 30 closest to the PFP, its dimensions exceed the dimensions of the DA, the selected useful signal has a greater modulation depth with a negative sign and is recorded by a block of a large threshold of PFP facilities;

- when driving through the bend of the foot violator and crossing the ZO section of the one closest to the TIR, it is smaller than the ZO size - the selected useful signal has a small modulation depth with negative positive signs and is recorded by blocks of small and positive PRM thresholds.

The alarms generated by the PRM facility are transmitted to the SSI along with information about the blocks (block) of the threshold that registered the useful signal. In SSOI, an algorithm is applied (Fig. 4):

- recognizing the detected intruder as a vehicle, if information on the block of a large threshold was received twice;

- recognizing the detected intruder as a pedestrian, if information on different blocks of the threshold (large threshold, small and positive thresholds) was subsequently received;

- determining the direction of movement of the foot intruder according to the order of receipt of information about threshold blocks, taking into account the well-known CO deployment scheme: with the first alarm, information was received about the high threshold block, and with the second about the small and positive thresholds: the intruder moves in direction AB; if the information about the threshold blocks, goes in reverse order: the intruder moves in the direction of VA (Fig. 4).

The method includes two stages: preparatory and main. Preparatory stage:

1. Deployment on the bend of the road according to the established scheme of detection tools, including: a transmitter 3 and a receiver consisting of an amplifier 4, a band-pass filter 5, a detector 6, a high threshold block 7, an output 8 interface, a small threshold block 9, a positive block 10 threshold (Fig. 3, 8).

2. Deployment on the ground of the system 11 for collecting and processing information (Fig. 8).

3. Writing to the system 1 of collecting and processing information of the decision-making algorithm (Fig. 4).

The main stage begins when the intruder moves through the bend of the road and enters it in the AOR funds, it includes:

1. The selection of the detector 6 from the signal received at the input of the receiver, amplified by the amplifier 4 and the useful signal filtered by the band 5 filter (Fig. 8).

2. Analysis of the depth and sign of the modulation of the useful signal received from the detector 6 to the blocks 7 of the large threshold, 9 small threshold, 10 positive threshold (Fig. 8).

3. When the vehicle is moving, the registration of the useful signal with a large modulation depth and a negative sign with a large threshold unit 7 (Fig. 6, 8).

4. When an intruder is moving in the direction AB, registration of a useful signal with a large modulation depth and a negative sign with a large threshold unit 7 (Fig. 6, 8).

5. When a pedestrian intruder moves in the direction of BA, the registration of a useful signal with a small modulation depth and negative with positive signs are blocks of 9 small and 10 positive thresholds (Fig. 7, 8).

6. Formation and transmission of PFP of the first alarm with indication of blocks (block) of the threshold, which registered the useful signal by the output 8 interface to the system 11 for collecting and processing information (Fig. 8).

7. The reception system 11 of the collection and processing of information of the first alarm (Fig. 8).

8. The intruder’s exit of 30 means, the formation of a DSP CO of the duty signal and its transfer to the information collection and processing system 11 (FIG. 8).

8. The second intersection of AOR funds by the offender.

9. The selection of the detector 6 from the signal received at the input of the receiver, amplified by the amplifier 4 and the useful signal filtered by the band-pass filter 5 (Fig. 8).

10. Analysis of the depth and sign of the modulation of the useful signal received from detector 6 to blocks 7 of a large threshold, 9 small thresholds, 10 positive thresholds (Fig. 8).

11. When the vehicle is moving, the registration of the useful signal with a large modulation depth and a negative sign with a large threshold unit 7 (Fig. 6, 8).

12. When the foot intruder is moving in the direction AB, registration of a useful signal with a small modulation depth and negative with positive signs are blocks 9 of small and 10 positive thresholds (Fig. 7, 8).

13. When a pedestrian intruder is moving in direction VA, registration of a useful signal with a large modulation depth and a negative sign with a large threshold unit 7 (Fig. 6, 8).

14. Forming and transmitting the PFP of the second alarm signal indicating blocks (block) of the threshold that registered the useful signal by the output 8 interface to the system 11 for collecting and processing information (Fig. 8).

15. The reception system 11 of the collection and processing of information of the second alarm (Fig. 8).

16. Recognition by the system 11 of collecting and processing information of the type of an intruder detected (Figs. 4, 8):

- if information only about the large threshold unit has been received twice - the intruder is the vehicle;

- if information on different blocks of the threshold (large threshold, small and positive thresholds) has been received consistently.

17. In the case of movement of the foot intruder, the determination by the system 11 of collecting and processing information of its direction of movement (Fig. 3, 4, 8):

- if the first alarm received information about a large threshold unit, and with the second, about small and positive threshold units: the intruder moves in the direction of АВ;

- if information about the small and positive threshold units was received with the first alarm signal, and with the second one about the large threshold unit: the intruder moves in the direction of VA.

18. Resetting the memory of the system 1 for collecting and processing information (Fig. 8).

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

- FIG. 1 is a diagram of the deployment of two linear radio wave detection means in a known security monitoring method;

- FIG. 2 - decision table (algorithm) about the type and direction of motion of the detected intruder in a known method with two linear radio wave detection means;

- FIG. 3 is a diagram of the deployment of linear radio wave detection tools in the proposed method;

- FIG. 4 shows a decision table (algorithm) on the type of the detected intruder and the direction of movement of the foot intruder in the proposed method;

- FIG. 5 - a table of the ratio of the cross-sectional area of the first Fresnel zone to the detection zone of a typical linear radio wave detector and the areas of silhouettes of violators of different types;

- FIG. 6 is a plot of the useful signal allocated by the receiver when crossing the detection zone of the vehicle at any site or on foot on the site closest to the receiver;

- FIG. 7 is a plot of the useful signal allocated by the receiver when the pedestrian intruder detects the intersection of the zone closest to the transmitter;

- FIG. 8 is a structural diagram of the relationship of the devices used in the implementation of the proposed method.

The technical result consists in the possibility of recognizing the type of the intruder found at the bend of the road and determining the direction of movement of the foot intruder using one CO.

Information sources

1. Shumov, V.V. The use of mathematical methods and models to justify decisions on the protection of the state border: Scientific and practical guide. - Part 2. - M .: Enlightenment, 1996. - 196 p.

2. Korshnyakov, V.G. Signaling means of protection of local areas: uch. manual / V.G. Korshnyakov - Kaliningrad: KPI FSB RF, 2004. - 135 p.

3. Marshalov, T.A. Technical means of border protection: a textbook / TA. Marshalov, A.V. Gustov, I.M. Potapov. - Kaliningrad: KPI FSB RF, 2009. - 568 p.

4. Pat. 2645598 Russian Federation, IPC 51 G08B 13/00. Method of security monitoring using linear radio wave detection / S.A. Udot., A.V. Rubanik - №2017103278; declare 01/31/17; publ. 21.02.18, Byul. №6.

5. Magauenov, R.G. Alarm systems: fundamentals of the theory and principles of construction: account. allowance / R.G. Magauenov - M .: Hot - Telecom, 2004. - 367 p.

6. Dolukhanov, M.P. Radio wave propagation: Textbook - M .: Svyaz'izdat, 1960. - 391 p.

Claims (1)

Method of security monitoring of the road by linear radio wave detection means, which consists in monitoring the curvature of the road with one detection means, in which the receiver and transmitter are turned from opposite sides of the bend point of the road so that the detection zone of the detection means crosses the road in two sections; the distance from the receiver to the site nearest to it did not exceed 10 meters; the distance from the transmitter to the site nearest to it exceeded half the distance of the receiver-transmitter by no more than 10 meters; the differences in the cross-sectional areas of the first Fresnel zone in the following sections: the cross-sectional area in the area closest to the receiver is at least two times smaller than the sectional area in the area closest to the transmitter; forming by the receiver two alarms when the intruder moves through the bend of the road and transmits them to the system for collecting and processing information; ensuring the reception by the information processing system of alarms, characterized in that when crossing a portion of the detection zone closest to the receiver, an intruder of any type allocates a useful signal with a large modulation depth with a negative sign, which is registered by the unit of the high threshold of the detection facility receiver; when crossing the part of the detection zone closest to the transmitter, the modulation sign and depth of the emitted useful signal and the blocks (block) registering it depend on the type of intruder: when the site is crossed by a foot intruder, a useful signal is allocated with a small modulation depth and negative with positive signs, which it is registered by blocks of small and positive thresholds of the detector; when a vehicle crosses a section, a useful signal is emitted with a large modulation depth and a negative sign, which is registered by the unit of a large threshold of the detection facility receiver; along with alarms, the information acquisition and processing system transmits information about the threshold blocks of the detector's detector that registered the useful signal; in the system for collecting and processing information, an algorithm is used that recognizes the detected intruder as a vehicle if only information about the block of the large threshold of the detection facility receiver has been received twice; recognizing the detected intruder as a pedestrian in the event that information on different blocks of the threshold of the detector; determining the direction of movement of the foot intruder by the order of receipt of information about the blocks of the threshold of the detector’s detector, taking into account the known pattern of deployment of the detector.

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