RU2613927C2 - Anti-theft method for vehicles and device for its application - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: anti-theft device comprises of a main unit (1). The main unit (1) comprises of a processor (2) and a multiplex bus driver (3). The processor (2) includes a control module (4), authorization method (5) and lock module (6). Using the multiplex bus driver (3) the processor (2) receives for processing the data about the car status and gives necessary digital control commands to the functional car parts when it detects unauthorized driving, so the car engine stops or it is impossible to make it run. An anti-theft method for vehicles is also proposed.

EFFECT: reduction of overall size of the device, stealth, expansion of its operation algorithms, achievement of increased reliability, reduction of current consumption, minimization of the number of connections to the output wires of the car, opportunity to use it with other anti-theft devices.

2 cl, 1 dwg

Description

The invention relates to techniques for protecting vehicles equipped with digital multiplexed data buses to prevent illegal entry into vehicles, unauthorized engine starting for unauthorized use or theft of vehicles. The invention can be used as an immobilizer or STFS, the main distinguishing method, which from other systems of this kind is not only the ability to receive and process status commands about the state of the vehicle, but also the ability to enable protection against unauthorized starting, including prohibiting the engine from starting or shutting down , by processing and submitting digital commands via the multiplex data bus.

Various anti-theft devices are widely known today, the main ways of blocking the engine of which is to break the electrical circuits of the vehicle. Of the existing solutions, methods of blocking by means of electromechanical relays, digital relays, radio-controlled relays, semiconductor power switches are known (RU 2059484 C1, B60R 25/00, 05/10/1996; RU 2309861 C1, B60R 25/00, 11/10/2007; RU 2440902 C2 , B60R 25/04, 01/27/2012).

All known methods of locking "into the gap" of the standard circuit of the vehicle have a number of significant drawbacks. Blocking relays fail over time for various reasons: aggressive external environment, strong radio interference, operation from external electromagnetic fields, wear of mechanisms, etc.

The ability to detect blocking by vehicle diagnostics, as well as the occurrence of errors in the vehicle control unit due to an abnormal break in the electrical circuit.

Limited switching current. For this reason, modern relays with reduced dimensions or power switches with incorrect connection or prolonged power loads fail. If in such cases the blocking relays or power switches fail and the electrical circuits remain open, the vehicle owner can no longer control the vehicle, which creates additional problems.

Characteristic noises. For this reason, when you connect a lock to a gap using electromechanical relays, it becomes possible to find a gap by intruders. Another disadvantage of locking the functional organs of the vehicle by electromechanical relays is the high current consumed to control the relay. Equally important is the limited connection points to break the electrical circuits of the vehicle to block it.

The unreliability of the connection and isolation of contacts in the place of rupture of standard wiring, which are subject to the effects of aggressive external environment and vibrations. The rupture of the main electrical circuits due to oxidation of the contact point with the relay interlock can lead to the engine stopping at speed and, accordingly, to a traffic accident.

In such modern devices as SkyBrakeDD2 + (www.autonams.lv) from AUTONAMS LLC or Pandect IS-670 from Pandora Trade LLC (www.alarmtrade.ru), which have built-in blocking and relatively small dimensions, when connected lockable circuit, the switched current should be no more than 10 A with a long-term load and not more than 20 A with a duration of up to 1 minute. Such parameters relate to switched circuits without an inductive component in the load. When realizing the possibility of operation of devices with higher loads of switched current, it is inevitable to have to increase the dimensions of the devices, which is a significant minus.

Other disadvantages of such blocking devices are the limited informing of the owner of the events and the state of the vehicle security zone, as well as a narrow set of blocking triggering algorithms. The solution of the last identified drawbacks is carried out on the example of the invention, patented under the number RU 2440256 C2, B60R 25/04, 01/20/2012.

The pluses include the increased functionality of the device, due to the possibility of receiving status commands on the digital multiplexed data bus of the vehicle and the small size of the device. The disadvantages of the above device include the lack of the ability to block the functional organs of the vehicle in a "non-disruptive" way. It can be concluded that modern devices, the main method of which is to “lock” the standard electrical circuits, are either larger in size, or difficult to install on vehicles, with equal protective qualities, or have limited functionality, or have technical limitations for the produced locks.

Known methods of locking "into the gap" of the electrical circuits of the vehicle are much more time-consuming and not always reliable.

An object of the invention is the prevention of unauthorized use of the vehicle, based on improving the degree of protection of the vehicle security device through the use of a non-traditional, continuous, non-scanned digital method of locking the functional organs of the vehicle, as well as optimizing the time and ease of installation of the device itself.

The technical result is the development of a fundamentally new way to block the functional organs of the vehicle, increasing the reliability of the device, secrecy, expanding the algorithms of its operation, reducing its size, minimizing current consumption, minimizing the number of connections to the standard wires of the vehicle, the ability to work with other anti-theft devices (car alarm, additional immobilizer , GSM modules, etc.).

The problem is solved in that a means of blocking its functional organs by the digital method is implemented on the vehicle, by processing data and issuing digital control commands via the vehicle’s multiplex data bus, without breaking the vehicle’s standard wires.

The task is also solved by the fact that the vehicle is equipped with a control unit that can be used for digital digital blocking of electrical circuits of the vehicle, which contains a control unit consisting of a processor that includes an authorization module, a control module, a lock module and a computer bus driver through which the processor receives for processing data on the state of the car and issues the necessary control digital commands to the functional bodies of the vehicle when it detects an attempt to unauthorized control of the vehicle, b due to which the vehicle engine stops working or it is impossible to start it

In FIG. 1 shows a functional diagram of the vehicle.

The control unit consists of a main unit 1. The main unit 1 contains a processor 2, a multiplex bus driver 3. Processor 2 contains a control module 4, an authorization module 5, and a lock module 6.

PU can be supplemented by a transceiver 7 and an authorization unit 8, the main elements of which are a processor 9 and a transceiver 10.

The control module 4 is connected to the user authorization module 5, the lock module 6 and the bus driver 3. The control module 4, depending on the processed vehicle status data received from the computer bus driver 3 and the authorization module 5, in case of detection of unauthorized control of the vehicle, issues blocking module 6 control signal. Blocking module 6 issues the necessary command through driver 3 to the computer multiplex bus of the vehicle, as a result of which the engine of the vehicle is turned off or the possibility of starting it is excluded.

Authorization of the owner can be carried out by successively pressing the standard buttons of the vehicle. This sequence is set by the owner himself in a specially provided password change mode. In the particular case, the owner’s authorization can be supplemented by using block 8, made in the form of a user-portable label. The label is connected to the main module via a radio channel at a frequency of 2.4 GHz by means of transceivers 4 and 10.

The functionality of the device allows not only to control the engine lock, but also to receive digital status commands on the data bus from the digital modules of the vehicle through the bus driver 3, on the basis of which the control module of the main unit 4 implements the algorithm for protecting the vehicle from unauthorized control. This method of obtaining information allows you to significantly expand the decision-making algorithm for a possible lock. At the same time, the minimum number of connections to the electrical circuits of the vehicle is made, which allows to minimize the size of the control panel and realize its most secretive installation. It remains possible to automatically start the engine (autostart) without having to go through the authorization procedure for the vehicle owner and block it when certain events occur, for example, shifting the gearbox position from the Parking mode, instantly shutting down the engine in the event of a start of movement, and other variants of events.

When implementing the non-disruptive method of blocking, the current consumed by the device decreases, and the overall dimensions of the PU also decrease.

The functional set of PUs may differ between TS models due to the difference in technical solutions implemented in them. Initial programming is done at the factory. Changing the settings of the control panel for a specific vehicle is carried out by means of a software computer application or by entering the special mode of the control panel when it is installed on the vehicle.

On the basis of the device, it is possible to build various variants of anti-theft systems: slave alarm, immobilizer, optional GSM, GPS communication, or combine the work of several devices into a single anti-theft complex.

Miniature size, the minimum number of connection points (from four), tightness and a digital locking method can significantly change the usual way of installing a remote control, making the device not only difficult to visually detect, but also difficult to diagnose.

The advantage of the digital locking method by transferring data between the device and the digital modules of the vehicle via the bus is the ability to simultaneously lock several functional organs of the vehicle, which provides additional resistance to theft of the vehicle, and also simplifies and reduces the cost of installing the device on the vehicle, in comparison with known methods where several external relays or devices with semiconductor power switches are used to break several electrical circuits of the vehicle.

Thus, the claimed invention allows to significantly increase the resistance to theft of vehicles by combining high functionality, small dimensions, which means increased stealth, ease of installation, as well as a fundamentally new way to block the functional organs of the vehicle.

Claims (2)

1. A method of protecting the vehicle from theft, characterized by an installed anti-theft device, which includes blocking the vehicle’s functional organs, which is carried out digitally by processing data and issuing PU commands via the vehicle’s multiplex data bus without breaking the vehicle’s standard wires. 2. A device that implements inextricable digital locking of the vehicle’s functional organs, comprising a control unit consisting of a processor that includes an authorization module, a control module, a lock module, and a computer bus driver, through which the processor receives data on the vehicle’s state and issues the necessary control digital commands to the functional organs of the vehicle when an attempt is made to unauthorized control of the vehicle, due to which the engine of the vehicle stops working or not POSSIBILITY produce its launch.

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