RU152901U1 - ELECTRONIC DEVICE FOR PROTECTING THE VEHICLE AGAINST Hijacking - Google Patents

Abstract

1. An electronic device for protecting a car from theft, comprising a housing in which a microprocessor is located, connected to a connector for powering it installed on the housing, and having a connector for connecting the microprocessor to a vehicle data bus, characterized in that the microprocessor has a bus data reading module vehicle data corresponding to the launch of vehicle power units and the fact that the microprocessor has a data generation module in the vehicle data bus corresponding to a stop of vehicle power units ya.2. The device according to claim 1, characterized in that the microprocessor has a time delay module for generating data in the vehicle data bus corresponding to stopping the vehicle power units. The device according to claim 1, characterized in that the module for reading data from the vehicle data bus corresponding to starting the vehicle power units includes a data reading unit from the vehicle data bus corresponding to starting the vehicle engine. The device according to claim 1, characterized in that the module for reading data from the data bus of the car corresponding to the launch of the power units of the car includes a block for reading data from the data bus of the car, corresponding to transferring the gearbox to the vehicle’s driving mode. The device according to claim 1, characterized in that the module for generating data in the vehicle data bus corresponding to the stop of the vehicle power units includes a unit for generating data in the vehicle data bus corresponding to the vehicle engine stop. The device according to claim 1, characterized in that the module for generating data into the data bus of the automobile

Description

The technical field to which the utility model belongs.

The invention relates to the equipment of vehicles, namely to electronic automobile anti-theft devices, comprising a housing in which a microprocessor is connected to a connector for power supply installed on the housing and having a connector for connecting the microprocessor to the vehicle data bus and can be used to Applications in cars for protection against theft.

The level of technology.

This description describes the option of connecting the electrical components of the car via the data bus. As an example of such a data bus, a CAN bus is mainly intended. The CAN bus allows you to interconnect any number of sensors, controllers, actuators and other units in the car (for example: ABS, SRS AIRBAG, ESP, immobilizer, engine control unit, climate, gearbox, central locking, light, suspension, instrument panel, etc. ...) in duplex mode (receiving and transmitting data) at a speed of up to 1 Mbps. In this case, the CAN bus itself consists of only two wires (twisted pair). Previously, to connect the blocks, it was necessary to use hundreds of wires since the transfer of a unit of information from block to block was carried out on a separate wire.

Physically, CAN is a serial asynchronous bus, the data of which is transmitted either through a twisted pair cable, or through an optical fiber, or via a radio channel. The bus is multimaster, i.e. it can be controlled by several devices at once. Theoretically, the number of devices connected to it is not limited.

It is clear that interrupting physical access to such a bus, you can block the car and prevent theft. If the electronic control unit for the car does not receive data from, for example, the crankshaft sensor, any sensor, then the car simply will not start. But anti-theft devices on this principle of operation are easy to diagnose and bypass. It is enough to restore the electrical connection with the unit, the operation of which was blocked by the anti-theft device.

There are also electronic automobile anti-theft devices that disrupt the operation of one of the main components of the car, for example, an engine. So it is known from the prior art electronic automobile anti-theft device containing a housing in which there is a microprocessor connected to a connector installed on the housing for its power, and having a connector for connecting the microprocessor to the vehicle data bus. See the description of the patent for the invention of the Russian Federation No. 2401215, published in 2010.

In this device, the microprocessor blocks the passage of signals from the crankshaft position sensor and from the camshaft sensor to the electronic control unit of the engine of the vehicle.

This device is the closest in technical essence to the claimed utility model and is taken as a prototype for the proposed utility model.

The disadvantage of this device is the low reliability of car protection against theft due to the possibility of determining by the hijacker the reasons for the inability to steal the car and their further elimination. Indeed, such a device is detected using a computer device that connects to the CAN bus for diagnostics through a special diagnostic connector when conducting a test for engine operation, namely, studying the signal from the crankshaft position sensor. Or the hijacker uses a portable oscilloscope, which will detect the absence of a signal from the sensors directly at the inputs of the electronic control unit. As a rule, the hijacker in this case does not look for the place of the sensor rupture or bypass, but simply sends the signal from the sensor directly to the required input of the electronic unit, bypassing the blocked section.

Disclosure of a utility model.

Based on this original observation, the present utility model mainly aims to propose an electronic automobile anti-theft device that can at least smooth out at least one of the above disadvantages, namely, to increase the reliability of car protection from theft due to the difficulty of determining the reasons for the hijacker to not steal car

To achieve this, the microprocessor has a module for reading data from the vehicle data bus, corresponding to the launch of the vehicle power units. The microprocessor has a data generation module in the vehicle data bus corresponding to the stop of the vehicle power units. Thanks to this advantageous characteristic, it is possible to take measures to protect the car from theft, which do not violate any electrical circuits of the car, do not violate any signals, everything remains operational, and the car can be started, until this moment the proposed utility model does not reveal its existence and does not can be detected. Moreover, as soon as it receives a signal about the successful start of the main power units of the car, the proposed device generates a signal to stop the power units of the car in the data bus.

There is a variant of the utility model in which the microprocessor has a delay module for generating data in the vehicle data bus corresponding to the stop of the vehicle’s power units. Thanks to this advantageous characteristic, it becomes possible to spread the start and stop of the vehicle’s power units in time, which makes it difficult for the hijacker to understand the reasons for the car’s units to stop working.

In one embodiment of the utility model, a module for reading data from a vehicle data bus corresponding to starting a vehicle’s power units includes a data reader from a vehicle data bus corresponding to starting a car engine. Thanks to this advantageous characteristic, it becomes possible to read data corresponding to engine starting, according to which it is necessary to apply anti-theft measures.

There is another embodiment of the utility model, in which the module for reading data from the vehicle data bus corresponding to starting the power units of the car includes a unit for reading data from the vehicle data bus corresponding to transferring the gearbox into vehicle driving mode. Thanks to this advantageous characteristic, it becomes possible to read data corresponding to the transfer of the gearbox into the vehicle’s driving mode, according to which it is necessary to apply anti-theft measures.

There is a variant of the utility model in which the module for generating data in a vehicle data bus corresponding to a stop of a vehicle’s power units includes a unit for generating data in a vehicle data bus corresponding to a vehicle engine stop. Thanks to this advantageous characteristic, it becomes possible to stop the car engine, thereby preventing theft of the car.

There is a variant of the utility model in which the module for generating data in the vehicle data bus corresponding to the stop of the vehicle power units includes a unit for generating data in the vehicle data bus corresponding to the transfer of the gearbox to the car parking mode.

Thanks to this advantageous characteristic, it becomes possible to shift the vehicle gearbox to the “Parking” position, thereby preventing the car from being stolen.

There is a variant of the utility model in which the microprocessor has an activation / deactivation module. Thanks to this advantageous characteristic, it is possible to turn the protection device on and off.

There is a variant of a utility model in which an activation / deactivation module is connected to a connector for connecting to a vehicle data bus and adapted to receive commands for activation / deactivation from alarm devices or an immobilizer connected in the same way to a vehicle data bus. Thanks to this advantageous characteristic, it becomes possible to control the proposed device via an alarm or an immobilizer, via the vehicle’s standard data bus, excluding physical communication with conductors.

There is a variant of the utility model in which the activation / deactivation module is connected to the connector for connecting to the vehicle data bus and is adapted for reading data from standard modules and standard buttons. Thanks to this advantageous characteristic, it becomes possible to control the proposed device through data from the standard devices of the car. For example, a module is activated when receiving data from a standard system when arming with a standard key, and module deactivation occurs by receiving data from pressing regular buttons in the correct sequence.

There is a variant of the utility model in which the activation / deactivation module is adapted for connection with an additional remote on / off radio device. Thanks to this advantageous characteristic, it becomes possible to control the proposed device remotely, excluding physical communication with conductors.

There is a variant of the utility model in which the activation / deactivation module has a connector for connecting to an external device via a separate input, consisting of one wire. This input can be connected both to a digital alarm code bus and to have analog control.

Due to this advantageous characteristic, it becomes possible to control the proposed device via a separate digital signaling code bus or the appearance of a constant analog signal. For example, the on / off button of the proposed device may be hidden somewhere. Or it is combined directly with an existing button or switch in the passenger compartment.

The set of essential features of the proposed utility model is unknown from the prior art for devices of similar purpose, which allows us to conclude that the criterion of "novelty" for the utility model is met.

A brief description of the drawings.

Other distinguishing features and advantages of the utility model clearly follow from the description below for illustration and not being restrictive, with reference to the accompanying drawings, in which:

- figure 1 schematically depicts a functional diagram of an electronic automotive anti-theft device, according to a utility model.

- figure 2 depicts the stages of the operation of the device for protecting car doors from unauthorized opening, according to the utility model.

According to figure 1, an electronic automobile anti-theft device comprises a housing 1, in which a microprocessor 2 is located, connected to a connector 3 mounted on the housing 1 for its power supply, and having a connector 4 for connecting the microprocessor to the vehicle data bus 5. An example of a vehicle data bus is a CAN bus.

The microprocessor 2 has a module 21 for reading data from the vehicle data bus 5, corresponding to the launch of the vehicle power units. The microprocessor also has a data generation module 22 in the vehicle data bus 5 corresponding to a stop of the vehicle power units.

The microprocessor 2 may optionally have a module 23 delay the formation of data in the data bus 5 of the vehicle, corresponding to the stop of the power units of the vehicle.

The module 21 for reading data from the data bus of the car corresponding to the launch of the power units of the car may include a block 211 for reading data from the data bus of the car corresponding to starting the engine of the car and / or the block 212 for reading data from the data bus of the car corresponding to the gearbox car movement.

The module 22 for generating data in the data bus of the car corresponding to the stop of the power units of the car may include a block 221 for generating data in the bus of the car for stopping the car engine and / or block 222 for generating the data in the bus of the car corresponding to the transfer of the gearbox to the parking mode of the car .

The microprocessor has an activation / deactivation module 24, which can be adapted to connect to an additional remote on / off radio device. Or, the activation / deactivation module 24 may have a connector for connecting to an external device via a separate digital code bus consisting of one wire. Alternatively, the activation / deactivation module 24 may be connected to a connector for connecting to a vehicle data bus and adapted to be connected to an alarm device or vehicle immobilizer. The activation / deactivation module can be connected to the connector for connecting to the vehicle data bus and adapted to receive commands for activation / deactivation from signaling or immobilizer devices that are also connected to the vehicle data bus. Or the activation / deactivation module can be connected to the connector for connecting to the vehicle data bus and adapted to read data from the standard modules and standard buttons.

A specific implementation of a data bus means a CAN bus, for example, the current specification for the CAN protocol is “CAN Soecjfication version 2.0”.

As an example of a microprocessor, any PIC controller with the ability to work with a CAN bus can be given, for example, the PIC18F2580 advanced Flash microcontroller with an ECAN module, a 10-bit ADC and nano-watt energy management technology Data that is transmitted via the CAN bus for each car manufacturer has its own , and even they are different for different brands. Therefore, for each car, the proposed utility model can be individually built.

Implementation of a utility model.

Electronic car anti-theft device operates as follows. (A non-limiting example of a utility model is given). According to figure 2:

Stage A1. Install the proposed electronic car anti-theft device inside the car. Since it has small dimensions, they hide it, for example, in any invisible place.

Stage A2. They bring power to it and connect it to the CAN bus of the car.

Stage A3. When searching before the hijacking, which can be carried out by a hijacker in order to detect extraneous anti-theft devices, the proposed utility model does not manifest itself in any way. Also, when starting the engine and / or when shifting the gearbox to the driving position, the proposed utility model does not manifest itself for some time at all.

Stage A4. After some time of delay, having received a signal about starting the engine and / or transferring the gearbox to the driving position, the proposed electronic automobile anti-theft device generates a signal that corresponds to blocking the main components of the car, for example, stopping the engine and / or shifting the gearbox to the “Parking” position ".

Stage A5. Turn on and off the proposed electronic car anti-theft device using the module 24 activation / deactivation, which can be adapted to connect to an additional remote device on / off by radio, or have a connector for connecting to an external device via a separate digital code bus, be connected to a connector for connecting to the vehicle data bus and is adapted to connect to an alarm device or car immobilizer.

The above embodiments of the utility model are exemplary and allow you to add new options or modify the described. An example of a modification is the option of generating signals not to block the vehicle’s power unit, but to generate another signal, to which the electronic control unit itself can respond by blocking the engine.

Indeed, there are options for the performance of cars in which the main units of the vehicle are already programmed to stop when the electronic control unit receives some data that some minor nodes send. So, in some BMW models, when Drive mode is on and the car does not move when the door is opened, data is generated in the CAN bus, which the electronic control unit interprets as a danger of movement without a driver and immediately issues a command, a command to block the gearbox, namely transfer it to the "Parking" mode. In this embodiment, the proposed device, instead of a command, the gearbox lock can form a command corresponding to the door sensor signal, which is usually sent when the car door is open.

Industrial applicability.

The proposed electronic automobile anti-theft device can be implemented by a specialist in practice and, when implemented, ensures the implementation of the declared purpose. The possibility of being implemented by a specialist in practice follows from the fact that for each feature included in the formula of a utility model based on the description, a material equivalent is known, which allows us to conclude that the criterion of "industrial applicability" for the utility model is met.

In accordance with the proposed utility model, the applicants manufactured an electronic automobile anti-theft device based on the PIC18F2580c PIC controller capable of working with a CAN bus configured to detect a signal corresponding to engine start, a delay of 2 s, and generating a signal in the CAN bus to engine stop.

The pilot operation of the electronic car anti-theft device with a BMW car has shown that it allows

- identify the signal corresponding engine start

- generate a delay of 2 s

- generate a signal in the CAN bus corresponding to the engine stop.

Thus, the proposed device can effectively prevent the theft of a car.

All this, ultimately, ensures the achievement of the technical result achieved - increasing the reliability of car protection against theft due to the complexity of determining the reasons for the car thief not to steal a car. Indeed, the device does not manifest itself in any way, does not interfere with the operation of the systems, both at rest and in the activated state, is not detected using a computer device that connects to the CAN bus for diagnostics through a special diagnostic connector.

The advantage of using this utility model is also that it is simple and cheap to manufacture, extremely reliable.

It is recommended that this utility model be widely used in automobiles to protect against theft.

Claims (12)

1. An electronic device for protecting a car from theft, comprising a housing in which a microprocessor is located, connected to a connector for powering it installed on the housing, and having a connector for connecting the microprocessor to a vehicle data bus, characterized in that the microprocessor has a bus data reading module vehicle data corresponding to the launch of vehicle power units and the fact that the microprocessor has a data generation module in the vehicle data bus corresponding to a stop of vehicle power units i. 2. The device according to claim 1, characterized in that the microprocessor has a delay module for generating data in the vehicle data bus corresponding to the stop of the vehicle’s power units. 3. The device according to p. 1, characterized in that the module for reading data from the data bus of the car corresponding to the launch of the power units of the car, includes a unit for reading data from the data bus of the car, corresponding to the start of the car engine. 4. The device according to p. 1, characterized in that the module for reading data from the data bus of the car corresponding to the launch of the power units of the car, includes a block for reading data from the data bus of the car, corresponding to the transfer of the gearbox into the vehicle's motion mode. 5. The device according to claim 1, characterized in that the module for generating data in the vehicle data bus corresponding to the stop of the vehicle power units includes a unit for generating data in the vehicle data bus corresponding to the vehicle engine stop. 6. The device according to p. 1, characterized in that the module for generating data in the vehicle data bus corresponding to the stop of the vehicle power units includes a unit for generating vehicle data in the bus corresponding to the transfer of the gearbox to the car parking mode. 7. The device according to claim 1, characterized in that the microprocessor has an activation / deactivation module. 8. The device according to claim 7, characterized in that the activation / deactivation module is connected to the connector for connecting to the vehicle data bus and is adapted to receive commands for activation / deactivation from signaling devices or immobilizers that are also connected to the vehicle data bus. 9. The device according to claim 7, characterized in that the activation / deactivation module is connected to a connector for connecting to a vehicle data bus and is adapted for reading data from standard modules and standard buttons. 10. The device according to p. 7, characterized in that the activation / deactivation module is adapted to connect to an additional remote on / off device over the air. 11. The device according to claim 7, characterized in that the activation / deactivation module has a connector for connecting to an external device via a separate digital code bus consisting of one wire. 12. The device according to p. 7, characterized in that the activation / deactivation module is connected to the connector for connecting to the vehicle data bus and is adapted to connect to an alarm device or an immobilizer.

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