RU2524809C2 - System for engine start access with safety functions and servicing built around immobiliser - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to o carrier protection system. System of access to engine start is build around immobiliser and comprises blocking module and electronic radio switch. Blocking module comprises microcontroller with output to control the presence of car owner therein and input to monitor car locks operating state. Power switch with external input is used for control over car locks. Electronic radio switch is arranged in sealed case, smaller in size, and incorporates transceiver and three-axis accelerometer. Data exchange is effected in protected radio channel in high-speed dialog mode while RF channels get varies in dialog process.

EFFECT: higher protection of access system.

2 dwg

Description

The access system to start the engine with protection and service functions, based on the immobilizer, relates to the equipment of vehicles (TS), in particular to vehicle protection systems to block the engine in order to prevent unauthorized capture and theft.

Currently, there are a large number of anti-theft devices, supplemented by immobilizers. As a rule, the immobilizers in them are presented in the form of additional devices, that is, a controlled locking relay, designed to break any circuit of the car necessary to start the engine, such as powering the fuel pump, ignition, power to injectors, and engine sensor circuits. The designs of these devices are made with numerous external modules and units, often readily accessible connections, not protected from the “direct wire” surge. Anti-theft systems in which the immobilizer simultaneously performed the function of a blocking module and a control unit in the world market of security and anti-theft systems. At the same time, even the most technologically advanced immobilizer (with a non-contact control method, with digital wireless relay-locks, etc.) cannot always guarantee vehicle safety. Today, there are a fairly large number of ways to open the immobilizer, from reprogramming the system through the diagnostic connector, to copying the transmitting code using a grabber, etc.

A known system for protecting a vehicle from theft and capture [1]. The technical result of this invention is ensured by the simultaneous use of two ranges of operating frequencies for radio frequency identification of users, while two transmitters and two antennas are integrated in the key for the simultaneous use of two communication systems.

The disadvantage of this invention is that one of the antennas is low-frequency and has large dimensions, thereby increasing the size of the key and reducing the possibility of its hidden wearing.

Known automobile anti-theft device [2], implemented by means of display service information, made with the ability to transmit information to the display of a regular radio via radio waves; a software platform based on a completely open architecture of the state machine that provides programming of all possible state options, without exception; hood lock control module, control module; wireless control interlock modules, the end element of which is a power semiconductor key.

The disadvantage of this invention is the high cost, since the device contains at least four modules (including the label).

An immobilizer is known [3], the technical solution of which is to increase the reliability of vehicle protection against unauthorized use (theft) by using only individual data of a person with access to driving while deactivating the immobilizer by introducing a biometric recognition unit in the passenger compartment.

The disadvantage of this immobilizer is that the biometric recognition unit is connected to the other modules by wires, therefore, it does not seem difficult to detect and dismantle the system. The disadvantage of this immobilizer is that it does not protect against robbery, since a user who has access to control a car may be forced to go through identification through a biometric reader and then steal a vehicle.

Known immobilizer [4] (prototype), consisting of a control module, at least one electronic radio key and display unit (for user comfort), or a sound siren (at a reduced cost). This system has anti-theft functions, such as: engine lock mode “standard”, engine lock mode “anti-robbery”, outputs for controlling the hood lock, engine lock with a malfunction, engine lock based on vehicle movement, the ability to connect an additional lock relay and service functions such as: service mode, emergency shutdown by personal code, communication control mode, quick selection of the keyfob protection mode, visual and audible warning s about the upcoming blocking engine. The security of the code and the immobilizer occurs with the help of: dialogue authorization, protection against active relaying of codes, protection against intellectual attacks by the method of enumerating codes, protection against detection of a blocking circuit.

The disadvantages of this device are: the inability to use together with other security systems, since there is no communication interface ("Status" output), the lack of individual user settings, since the blocking module is not programmable, the need to connect an additional power module to control the hood lock.

The objective of the invention is to eliminate the disadvantages of the prototype, as well as improving the noise immunity of the radio communication channel between the modules, increasing the secrecy of the system modules, reducing the size, ease of installation, as well as reducing the power consumption of the lock module and electronic key.

The technical result of the claimed invention is to increase the protection of the access system to start the engine with protection and service functions, based on the immobilizer, from detection, simplifying the design, ease of use and installation, increasing functionality, protecting the electronic radio key from external factors.

The problem is solved in that in the access system to start the engine with protection and service functions, made on the basis of an immobilizer, containing a blocking module and at least one electronic radio key, in accordance with the claimed invention, the blocking module is a programmable control and monitoring device, has a power a key with an external "Power" output, has an external "Status" output and an "Additional" input.

In addition, the technical result is achieved by the fact that transceivers with the ability to track and measure the signal level were installed in the blocking module and the electronic radio key.

In addition, the technical result is achieved by the fact that in the blocking module, the linear voltage regulators were replaced by pulse DC-DC converters.

The technical result in the claimed invention is achieved by the fact that the electronic radio key is made in a sealed enclosure of a smaller size and has a three-axis accelerometer.

In addition, the technical result is achieved by the fact that the exchange of information between the modules of the system takes place via a secure radio channel in the high-speed dialogue mode, and the radio frequency communication channels change during the dialogue, with each dialogue.

All this allows you to completely solve the problem of the claimed invention in accordance with the technical solution.

The essence of the invention is illustrated in figure 1, figure 2

Figure 1 presents the functional diagram of the access system to start the engine with the functions of protection and service, based on the immobilizer.

Figure 2 presents a diagram of a sealed enclosure of an electronic radio key.

The claimed invention (FIG. 1) contains a blocking module 1 with a microcontroller 2, exchanging data with the system modules using a transceiver 3 and having reciprocal communications (input / output) with a three-axis accelerometer 4 and a power switch 5, which, in turn, has external "Power" output. Microcontroller 2 also has an external “Status” output and an external “Additional” input. The microcontroller 2 also has an output for controlling the interlock relay 6, which, in turn, has an external interlock output. Through an external input, a voltage of 12 V is supplied to pulse converters of constant voltage 7, which supply power to the microcontroller, transceiver, accelerometer and power switch (2, 3, 4, 5), respectively. The electronic radio key 8 contains a microcontroller 9, which exchanges data with the lock module 1 using a transceiver 10, and has an external output to a three-color LED indicator and external communication (input / output) with a button located on the upper part of the housing under the pressure plate. The electronic radio key 8 also contains an autonomous power source 11, a three-axis accelerometer 12, connected to the microcontroller 9 with an input / output connection for data transmission. The housing of the electronic radio key (Figure 2) consists of a pressure plate 13, the upper part of the housing 14, the silicone gasket 15 and the lower part of the housing 16.

The claimed invention is as follows:

1. A “Status” output was entered into the system blocking module, with which the microcontroller monitors the presence of the owner (electronic radio key) in the car. Due to the “Status” output, any security device installed in conjunction with an access to start the engine with protection and service functions based on the immobilizer also “sees” the presence of the owner (electronic radio key), this makes it possible for additional settings individually for each user .

2. In immobilizers that have a hood lock control function, the outputs of the blocking module are low current, which requires the installation of an additional external module for controlling door and hood locks, this solution lowered the immobilizer's secrecy due to additional wires and clicks when switching the relay. This problem is solved as follows - a power key was inserted into the lock module, the external "Power" output of which is used to control the door and hood locks, and the "Additional" input to the microcontroller is used to track their status. This eliminates the possibility of the lock operating when the hood and (or) doors are open, the installation process is greatly simplified.

3. In addition to the general modes known from the prior art, the “Free Hands” mode has been added to the system, which allows you to use the lock module to control door locks and increases the convenience of using the car, since the lock module does not turn on / off the security mode, but after a certain time period, but when removing / approaching the electronic radio key. To do this, transceivers were installed in the blocking module and the electronic radio key with the ability to track and measure the signal level, and the user has the ability to independently configure a three-level threshold.

4. To reduce power consumption, the linear voltage regulators in the blocking module are replaced by pulse DC / DC converters that convert 12 V to allowable 3.3 V for operation of the microcontroller, transceiver and accelerometer.

5. For better secrecy of the electronic radio key, its size is minimized, including by changing the size of the battery, and the case is sealed, due to the design solution and the fact that a silicone gasket was installed inside the case. The upper part of the case presses the silicone gasket as tightly as possible to the lower part of the case, due to which the electronic components and the battery located between the lower part of the case and the silicone gasket are protected from moisture and dust, which makes it work more durable and independent of the environment and others factors that can damage electronic components and batteries.

6. A three-axis accelerometer was installed in the electronic radio key, with the help of which the microcontroller detects that the electronic radio key is without movement for a specified time and turns it off, while the charge of the nutrient element is not used, therefore, its service life is increased.

6. The increase of noise immunity is carried out as follows: The known device, selected as a prototype, uses the original method of dialogue authorization, which includes the exchange of four packets. If at least one of the packages gets corrupted, the current dialog will fail. This problem is solved as follows - the transmission of the first and second packets is carried out on a channel registered in the blocking module, and the third and fourth packets are transmitted on a random channel, the choice of which is made using an encrypted random number. Thus, the transmission time on one channel is reduced, which increases the noise immunity of the information transmission.

In connection with the foregoing, it is obvious that the system of access to starting the engine with protection and service functions, made on the basis of the immobilizer, claimed as an invention, completely solves the problem, eliminating the disadvantages of the prototype, and has improved technical and user characteristics.

List of references

1. Patent for the invention of the Russian Federation No. 2376168, IPC B60R 25/10, Application: 2008150603/11, 12/22/2008, "SYSTEM OF PROTECTION OF VEHICLES AGAINST Hijacking and Capture".

2. Patent for the invention of the Russian Federation No. 2440256, IPC B60R 25/00, Application: 2010141449/11, 10/11/2010 "CAR ANTI-THEFT DEVICE"

3. Patent for utility model of the Russian Federation No. 54677, IPC B60R 25/04, Application: 2005140158/22, 12.22.2005, “IMMOBILIZER”.

4. Website of the company ULTRASTAR http://www.ultrastar.ru/360/10143, immobilizer StarLine i92 Lux (PROTOTYPE).

Claims (1)

An access system for starting the engine with protection and service functions, based on an immobilizer, containing at least a blocking module and an electronic radio key for user identification, characterized in that the blocking module has a microcontroller with an output by which the microcontroller monitors the presence of the owner in the car, and an input with which the state of door and hood locks is monitored, a power key with an external output used to control door and hood locks, a transceiver, pulse dc voltage converters, and the electronic radio key is made in a sealed enclosure of a smaller size and contains a transceiver and a three-axis accelerometer, when exchanging information via a secure radio channel in high-speed dialogue mode, the radio frequency communication channels change during the dialogue, with each dialogue.

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