RU136402U1 - SYSTEM OF PREVENTION OF THE THEFT OF CARS FROM THE PARKING EQUIPMENT EQUIPPED BY THE AUTOMATIC GARAGE - Google Patents

Abstract

A system for preventing theft of cars from a car park equipped with an automatic barrier, consisting of a static control station containing a receiver for detecting a GPS signal interference source, operating on the basis of monitoring the signal-to-noise ratio of the jammer (JNR), characterized in that the static control center contains a control unit and connected through it to the control system of the barrier, and next to the receiver to detect the source of interference of GPS signals, a receiver is installed to detect the source of interference of GSM signals, moreover, the antennas on the receivers are made with a narrow radiation pattern, at least one video camera is also installed, a wireless communication unit that is capable of transmitting images from cameras and information collected by the receivers to a remote server via the Internet, and the server is configured to process data and allocate via it has the same type of interference signals, and is also equipped with a program for determining license plates.

Description

The utility model relates to the field of automotive security alarm technology and can be used to prevent theft of cars from a parking lot equipped with an automatic barrier.

Today, the acute problem of finding stolen cars. Known anti-theft means, such as, for example, “Autophone” bugs, allow you to track the position of a vehicle using the GPS satellite navigation system, by the position of the radiating station of a GSM cellular operator. Car thieves are well aware of the presence of such bugs and, when hijacked, take measures to suppress them. Why use the jamming systems of both cellular communications [1], and against GPS signals. At the time of the car theft, the hijackers turn on the “jammers” and do not turn them off until the car is brought into the so-called “sedimentation tank” or a special underground garage that blocks GSM and GPS signals. Therefore, known systems are not effective.

In addition to using the mentioned systems, it is advisable to search for the hijacker by the “jammers” themselves, i.e. determine the position of "jammers" and, accordingly, a potential hijacker.

The closest solution in this regard is the detector technology described in [2]. It consists in the following.

Suppressors pose a serious threat to the future of intelligent transport systems. Their use is prohibited by law, and their illegal use may be prosecuted. To know the exact number of suppressors working, you need to place the suppressor detectors at special points and record interference. Successful locations of such detectors for initial measurements can serve as trunk interchanges.

Detection of the source of interference is based on monitoring the signal to noise ratio of the suppressor (JNR). In order to prosecute intruders, it is necessary to establish which suppressor is coming from the jammer. Therefore, the signal was analyzed in the time-frequency interval for the characteristic chirp signal of the suppressor. The gain of the input stage is set to a minimum value so that the input stage can cover high interference power.

Hijackers create a chirp impulse in the range from 9.4 to 44.9 MHz in the E1 / L1 frequency band (other frequency bands were not considered). The rest generate harmonic oscillations of 3 dB in a passband of about 0.92 MHz and have a temperature-dependent resonant frequency around the Galileo / GPS resonant frequency.

The analysis showed that the range of the suppressor is very dependent on the architecture of the receiver. In each scenario, suppressors had a strong effect. After detecting interference, it was necessary to mitigate their effect in the receiver. Softening methods such as short-term Fourier transforms or wave packets are provided.

Therefore, the prevention and mitigation of the effect of interference should be the object of research for developers of automotive communications systems. Interference in GNSS systems must be dealt with in the same way as other road hazards. This technology is selected as a prototype.

The advantage of the technology is that it shows the possibility of detecting jammers and counting them. A disadvantage of the technology is that it does not allow to prevent theft of cars from a parking lot equipped with an automatic barrier.

The technical result of the claimed solution is the possibility of reducing the risk of car theft from a parking lot equipped with an automatic barrier.

The specified technical result is achieved due to the fact that the car theft prevention system from a car park equipped with an automatic barrier, consisting of a static control point containing a receiver for detecting a GPS signal interference source, functioning on the basis of monitoring the signal-to-noise ratio of the jammer (JNR), characterized in that the static monitoring station contains a control unit and is connected through it to the barrier control system, and next to the receiver to detect the interference source of GPS signals A receiver has been installed to detect the source of interference of GSM signals, moreover, the antennas on the receivers are made with a narrow radiation pattern, at least one video camera is installed, a wireless communication node that is capable of transmitting images from cameras and information collected by the receivers to a remote server via the Internet, and the server is configured to process data and extract the same type of interference signals from them, and is also equipped with a program for determining license plates. The principle of achieving the stated result is based on the fact that when a source of interference of GPS signals and / or GSM signals is detected, an alarm is issued from the corresponding receiver to block the barrier, a photo or video of the car trying to leave the parking lot through the barrier is taken with a nearby video camera; then, the obtained information about the type of interference source of the radio signals and the received images are transmitted using the wireless communication node to a remote server on which data is recorded; The data collected on the server is further processed by determining the source of radio interference, the license plate number of the leaving car, and then the information about the number of this car is transmitted to the nearest traffic police station or the police, from where they can send the patrol car to the parking lot to check the documents with the driver.

Utility Model Implementation

The system can be implemented as follows.

A static control point is placed near the automatic barrier in the parking lot.

Select ranges for control (which type of signal suppressor we will identify and which ranges: GSM 900, DCS 1800, 3G / UMTS 2100, 3G / UMTS 900, CDMA 450, 4G / LTE800, 4G / LTE2500, Wi-Fi). The system "remembers" the ratio of the noise / signal level (for each range for each value of the carrier frequency).

Further, the system can be configured by the operator "manually" based on the conditions:

- what type of signal suppressor we will identify (which ranges will be monitored);

- what is the alarm threshold (for example, excess signal / noise by 10 dB);

- will there be enough excess in the entire range (for example, in the entire GSM range) or is it sufficient only in some part of the range;

- the ability to compare the excess of signal / noise in one band with another (for example, a large signal level appeared sharply in the GSM DownLink band 925-960 MHz, our system takes a close range of 900-920, if in this band a sharp excess is also observed at the same time , then most likely some kind of broadband interference is working, which is not of interest. If not, then it is most likely that GSM signals are intentionally jammed and the system is triggered. Similarly for other communication systems.

Antenna system with a narrow directivity pattern (gives a small "spot" and excludes cars or people passing outside the parking lot, with devices that create radio interference).

A static control point (1) (see Figure 1, Figure 2) is placed in a parking lot (15). The control point (1) contains a receiver for detecting the interference source of GPS signals (4) and a receiver for detecting the interference source of GSM signals (5), which operate on the basis of monitoring the signal-to-noise ratio of the suppressor.

A video camera (2) and a wireless communication unit (6) are installed near the receivers (4, 5). Detection of radio interference by receivers (4, 5) is carried out by antennas (3) with a narrow radiation pattern.

If a GPS interference signal source is detected (for example, using a detector [2]) and / or GSM signals, an alarm is sent from the corresponding receiver to the microprocessor (7) or other control unit, by which the barrier opening system (12) is blocked (13 ), and on whose command, with a number of installed cameras (2), they take a photo or video of a potentially stolen car (14) located near the barrier opening system (12) (13).

The received information about the type of interference source of radio signals and the received images are transmitted to the microprocessor (7), which generates a data packet and transmits it via a wireless communication node (6) via the Internet (8) to a remote server (9) on which data is recorded .

The data collected on the server (9) is further processed by determining the license plate. The determination of the vehicle number can be performed, for example, using the KODOS-Auto vehicle number identification system [4].

Then the server can send a CMC message to the owner of the car, and if he does not respond within 1-2 minutes with a CMC response with a certain code number, then information about the car number is transmitted to the nearest post (10) of the road patrol service, or to the police, from where they can send the patrol car (11) to the parking lot (15) to check the documents with the driver.

In the absence of a driver’s vehicle registration certificate, he can be detained as a potential hijacker until the circumstances are clarified, or if his documents are in order, but “jammers” are found in his car, then he can also be detained and fined, because he violates the law by creating interference in radio communication systems.

Thus, the possibility of reducing the likelihood of preventing car theft from a parking lot equipped with an automatic barrier is realized due to the fact that the hijacker is not allowed to use “jammers” when a car is stolen, which allows other security alarm systems to effectively inform the car owner about the theft without interference.

Information sources:

1. http://www.bughunter.ru/prod/prod_08.php

2.http: //xakep.ru/post/59338/

Claims (1)

A system for preventing theft of cars from a car park equipped with an automatic barrier, consisting of a static control station containing a receiver for detecting a GPS signal interference source, operating on the basis of monitoring the signal-to-noise ratio of the jammer (JNR), characterized in that the static control center contains a control unit and connected through it to the control system of the barrier, and next to the receiver to detect the source of interference of GPS signals, a receiver is installed to detect the source of interference of GSM signals, moreover, the antennas on the receivers are made with a narrow radiation pattern, at least one video camera is also installed, a wireless communication node that is capable of transmitting images from cameras and information collected by the receivers to a remote server via the Internet, and the server is configured to process data and allocate via It has the same type of interference signals, and is also equipped with a program for determining license plates.

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