Whole vehicle anti-theft system based on brake-by-wire system and whole vehicle anti-theft control method

Abstract

The invention belongs to the technical field of vehicle anti-theft control, and particularly relates to a whole vehicle anti-theft system based on a brake-by-wire system and a whole vehicle anti-theft control method. The whole vehicle anti-theft system comprises an electronic anti-theft controller and a line control system, wherein the line control system comprises a brake domain controller, a brake actuator and a line control pedal. And the electronic anti-theft controller is used for generating a dynamic seed key and an anti-theft key according to a request of the brake domain controller and carrying out data exchange with the brake domain controller. The braking domain controller is used for monitoring a vehicle state signal in real time, carrying out key comparison and sending out an instruction for executing a preset anti-theft measure; the brake actuator is used for executing brake operation and locking or unlocking wheels. And the drive-by-wire pedal is used for detecting the operation intention of a driver and locking or unlocking the pedal according to the instruction of the brake domain controller. The invention further provides a whole vehicle anti-theft system. According to the scheme, the anti-theft performance of the vehicle can be improved without additional hardware investment.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle anti-theft control, and in particular relates to a whole vehicle anti-theft system based on a wire control brake system and a whole vehicle anti-theft control method. Background Art

[0002] With the development of the automobile industry, vehicle safety issues have received increasing attention. In order to prevent vehicles from being stolen, existing vehicles are usually equipped with a whole vehicle anti-theft system, such as Figure 1 As shown, it mainly includes a remote control, an electronic anti-theft controller, an alarm device and an actuator. The remote control is generally integrated into the car key and is used to send a request to unlock the entire vehicle. The electronic anti-theft controller receives the unlock request sent by the remote control and performs key verification. If the key verification passes, it sends an instruction to the actuator to unlock; if the key verification fails, the alarm device may be triggered. Among them, the actuator mainly includes a steering wheel lock and a clutch lock. These actuators perform locking or unlocking operations after receiving instructions from the electronic anti-theft controller.

[0003] However, existing anti-theft systems have some shortcomings. If the driver does not activate the parking brake function (EPB) before leaving the vehicle, the hydraulic brake system will not actively brake the vehicle, resulting in the vehicle being towed away, posing a risk of theft. In addition, existing anti-theft systems mainly act on the steering wheel lock and clutch lock, and have low reliability. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a whole vehicle anti-theft system and a whole vehicle anti-theft control method based on a wire control brake system.

[0005] A first aspect of the present invention is to provide a vehicle anti-theft system based on a wire control brake system, comprising an electronic anti-theft controller and a wire control system, wherein the wire control system comprises a brake domain controller, a brake actuator and a wire control pedal.

[0006] The electronic anti-theft controller is used to generate a dynamic seed key and an anti-theft key according to the request of the brake domain controller, and exchange data with the brake domain controller.

[0007] The brake domain controller is used to monitor the vehicle status signal in real time, generate the expected key based on the seed key from the electronic anti-theft controller, and compare the key with the electronic anti-theft controller, and issue instructions to execute preset anti-theft measures based on the comparison results; the preset anti-theft measures include anti-theft warning and wheel braking.

[0008] Brake actuator, used to perform braking operations according to the instructions of the brake domain controller, locking or unlocking the wheels.

[0009] The wire-controlled pedal is used to detect the driver's operating intention and lock or unlock the pedal according to the instructions of the brake domain controller.

[0010] As a further optimization solution for the vehicle anti-theft system, the electronic anti-theft controller includes: A seed key generation module, used for dynamically generating a seed key; An anti-theft key generation module, used to generate an anti-theft key based on a seed key and a preset encryption algorithm; A first communication module, used for exchanging data with the brake domain controller, including receiving a seed key request from the brake domain controller, and transmitting the seed key and the anti-theft key to the brake domain controller through an encrypted channel; The alarm trigger module receives the instruction from the brake domain controller and triggers the alarm device when the key comparison fails.

[0011] As a further optimization solution for the vehicle anti-theft system, the brake domain controller includes: A real-time monitoring module, used for real-time monitoring of unlocking key request, wheel speed sensor signal, brake pedal signal and inertial sensor signal; if any one or more of the unlocking key request, wheel speed sensor signal, brake pedal signal and inertial sensor signal is monitored, a subsequent verification mechanism is started; A second communication module is used to exchange data with the electronic anti-theft controller, the brake actuator and the wire control pedal; An expected key generation module, used to generate an expected key based on a received seed key and a preset encryption algorithm; The key comparison module is used to compare the expected key with the anti-theft key from the electronic anti-theft controller. If the match fails, the anti-theft measures are triggered.

[0012] As a further optimization solution for the vehicle anti-theft system, the brake actuator is used to apply braking force to lock the wheels in anti-theft mode to prevent the vehicle from being illegally moved.

[0013] As a further optimization solution for the vehicle anti-theft system, the wire-controlled pedal includes: A pedal force sensor module and / or a pedal travel sensor module, used to detect the driver's operation of the brake pedal and feed back to the brake domain controller; The locking execution module is used to lock or unlock the wire-controlled pedal according to the instruction of the brake domain controller.

[0014] The second aspect of the present invention is to provide a vehicle anti-theft method based on a wire control brake system, wherein an electronic anti-theft controller and a brake domain controller exchange data through a preset communication mechanism; the brake domain controller monitors unlocking key requests, wheel speed sensor signals, brake pedal signals, and inertial sensor signals in real time; when the brake domain controller detects any one of the following situations: an unlocking key request, a change in the wheel speed sensor signal, a change in the brake pedal force or travel signal, and a change in the inertial sensor signal, the following steps are performed: The brake domain controller sends a seed key request to the electronic anti-theft controller; The electronic anti-theft controller generates a seed key and generates an anti-theft key according to a preset encryption algorithm; The brake domain controller generates an expected key based on the seed key and a preset encryption algorithm; The brake domain controller compares the generated expected key with the anti-theft key from the electronic anti-theft controller; if the key matches successfully, the vehicle is allowed to operate normally; if the key matches fail, anti-theft measures are triggered.

[0015] As a further optimization solution of the above vehicle anti-theft method, the brake pedal signal is a force signal from a brake pedal force sensor and / or a travel signal from a brake pedal travel sensor.

[0016] As a further optimization scheme of the above-mentioned vehicle anti-theft method, the anti-theft measures include: triggering an alarm device to alarm, controlling a brake actuator to apply a braking force and locking a wire-controlled pedal.

[0017] As a further optimization scheme of the above-mentioned vehicle anti-theft method, triggering the alarm device includes: starting the horn and starting the flashing lights.

[0018] As a further optimization scheme of the above-mentioned vehicle anti-theft method, the seed key is a unique key generated dynamically; the electronic anti-theft controller and the brake domain controller generate the anti-theft key and the expected key through the same preset encryption algorithm.

[0019] Beneficial Effects Compared with the existing mechanical electronic braking system, the solution of the present invention makes the brake domain controller and the electronic anti-theft controller work together through a preset communication mechanism, thereby improving the reliability of the anti-theft system. When the system detects an illegal operation, the brake domain controller will send instructions to the brake actuator to increase the brake clamping force and lock the wire control pedal to ensure that the vehicle is in a parked state and cannot be stolen. Through the coordination of a specific sensor monitoring combination and a dynamic anti-theft key verification mechanism, the system can respond quickly when illegal operations occur while ensuring correct responses to legal operations, thereby limiting the illegal movement of the vehicle and ensuring vehicle safety. Moreover, the solution of the present invention makes full use of the existing braking system and sensors, and does not require additional braking-related hardware investment on the basis of the existing hardware, and can achieve a highly reliable anti-theft function without additional hardware costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of the architecture of an existing vehicle anti-theft system.

[0021] Figure 2 It is a schematic diagram of the architecture of the vehicle anti-theft system of the present invention. DETAILED DESCRIPTION

[0022] The present invention is further illustrated by specific examples below. These examples are exemplary and are intended to illustrate the problem and explain the present invention, but are not intended to be limiting.

[0023] First, the composition of the vehicle anti-theft system based on the wire control braking system.

[0024] The whole vehicle anti-theft control architecture based on the wire control brake system, such as Figure 2 As shown, it includes an electronic anti-theft controller and a wire control system, wherein the wire control system further includes a brake domain controller, a brake actuator, and a wire control pedal.

[0025] (1) Electronic anti-theft controller The electronic anti-theft controller is the control component of the vehicle anti-theft system, responsible for receiving, processing and sending anti-theft related signals and instructions. The electronic anti-theft controller has the following functional modules: Seed key generation module Generate the basic data for encryption, namely the seed key. The seed key is generated dynamically to ensure the uniqueness and confidentiality of each generation.

[0026] Anti-theft key generation module Based on the received seed key and the preset encryption algorithm, a unique anti-theft key is generated. The anti-theft key is used for subsequent comparison to verify the legitimacy of the current operation.

[0027] First communication module Used to exchange data with the brake domain controller, and receive and send anti-theft related signals and instructions.

[0028] Alarm trigger module When a key matching failure signal is received, an alarm device (such as honking, flashing lights, etc.) is triggered to warn of illegal operation.

[0029] (2.1) Braking domain controller The brake domain controller is the electronic control unit of the brake domain, responsible for managing and coordinating the brake-related systems in the vehicle. It has strong computing and communication capabilities and can handle control logic and data exchange. The brake domain controller includes the following modules: Real-time monitoring module Real-time monitoring of unlock key request, wheel speed sensor signal, brake pedal signal, and inertial sensor signal. Once any of the following conditions is detected: unlock key request, wheel speed sensor signal change, brake pedal force or travel signal change, or inertial sensor signal change, the anti-theft verification process is immediately triggered.

[0030] Second communication module The second communication module is used to exchange data with the electronic anti-theft controller, brake actuator, and wire-controlled pedal, including receiving seed keys and anti-theft keys, sending execution instructions, etc.

[0031] Key Generation Module Receive the seed key sent by the electronic anti-theft controller, and generate the expected key based on the received seed key and the preset encryption algorithm. The generated expected key is used for subsequent comparison with the anti-theft key generated by the electronic anti-theft controller.

[0032] Key comparison module The generated expected key is compared with the anti-theft key generated by the received electronic anti-theft controller. If the keys are consistent, the vehicle is allowed to operate normally; if they are inconsistent, anti-theft measures are triggered. Anti-theft measures include anti-theft warning, brake actuator braking, and wire pedal control. Warning of illegal operation by honking the horn and flashing lights to alert people around. Force the vehicle to brake through the brake actuator to stop the vehicle from moving and prevent theft. By restricting or disabling pedal operation, illegal operators cannot drive the vehicle normally.

[0033] (2.2) Brake actuator The brake actuator is the actuator component in the wire control brake system, which is responsible for performing the braking operation according to the instructions of the brake domain controller. In addition to providing the braking function in daily driving, the brake actuator also ensures that the vehicle cannot move in the event of illegal operation in the anti-theft mode.

[0034] When the brake domain controller sends a brake command, the brake actuator applies braking force mechanically or hydraulically to slow down or stop the vehicle. In anti-theft mode, the brake actuator applies a larger or maximum braking force to lock the wheels to prevent the vehicle from being illegally moved. When the brake domain controller sends an unlock command, the brake actuator releases the braking force to restore the vehicle to a movable state.

[0035] (2.3) Wire-controlled pedals The wire control pedal is the interface between the driver and the brake system, responsible for detecting the driver's operation and transmitting signals. The wire control pedal has the following modules: Pedal force sensor module and / or pedal travel sensor module The pedal force sensor module is used to detect the driver's operating force on the brake pedal, convert the pedal force into an electrical signal, and send it to the brake domain controller, which can be used to determine the driver's operating intention. The pedal travel sensor module is used to detect the change in the travel of the brake pedal, convert the pedal travel into a signal, and send it to the brake domain controller, which can also be used to determine the driver's operating intention.

[0036] Locking execution module The lock execution module locks or unlocks the wire control pedal according to the instruction of the brake domain controller. Under normal circumstances, the lock execution module keeps the wire control pedal in the unlocked state according to the instruction, ensuring that the driver can operate the wire control pedal normally to achieve vehicle driving. In the anti-theft mode, the wire control pedal is locked to prevent illegal operation.

[0037] The second aspect is the operating mechanism of the vehicle anti-theft system based on the wire control braking system.

[0038] The brake domain controller performs real-time monitoring tasks. Once it detects any of the following situations: receiving an unlock key request, a change in the wheel speed sensor signal, a change in the brake pedal force or travel signal, or a change in the inertial sensor signal, the brake domain controller will respond immediately.

[0039] When the driver presses the unlock button of the remote control (car key) to send an unlock request, the remote control will send an unlock request to the vehicle via a wireless signal (such as RF or Bluetooth), and then the brake domain controller will detect the unlock request. This situation is in line with the normal unlocking process, and the legitimacy of the unlock request will be verified later through the anti-theft key.

[0040] The vehicle is equipped with a wheel speed sensor to detect the rotation speed of the vehicle's wheels. When the vehicle is stationary, the wheel speed sensor signal is zero; when the wheel speed sensor signal changes, it means that the vehicle is moving or trying to move. In this case, the anti-theft key is also used to verify the legality of the vehicle's movement to prevent illegal movement.

[0041] The brake pedal force sensor detects the force applied by the driver to the brake pedal and converts the force into an electrical signal. The travel sensor detects the displacement (travel) of the brake pedal and converts the displacement into an electrical signal. If the brake pedal force or travel signal changes, it means that the driver may be trying to brake or the vehicle is being illegally operated. In this case, the anti-theft key is also used to verify the legitimacy of the operation.

[0042] Inertial sensors (such as accelerometers and gyroscopes) are usually installed in the center of the vehicle body or on the chassis to detect dynamic parameters such as the acceleration and tilt angle of the vehicle and convert them into corresponding signals. If the inertial sensor signal changes, it means that the vehicle may be experiencing abnormal movement (such as being towed or hit). In this case, the anti-theft key is also used to verify the legitimacy of the vehicle's actions to prevent illegal operations.

[0043] When the brake domain controller detects any of the following situations: receiving an unlock key request, a change in the wheel speed sensor signal, a change in the brake pedal force or travel signal, or a change in the inertial sensor signal, the brake domain controller responds in the following manner: (S1) The brake domain controller sends a seed key request: The brake domain controller sends a seed key request to the electronic anti-theft controller, and the seed key is used to subsequently generate the expected key.

[0044] (S2) The electronic anti-theft controller generates a seed key and an anti-theft key: The electronic anti-theft controller generates a seed key based on the request, and then uses the preset secret key algorithm to generate a unique anti-theft key. The anti-theft key is generated dynamically, and a new key is generated for each request. The electronic anti-theft controller sends the generated seed key and anti-theft key to the brake domain controller.

[0045] (S3) Key Matching and Response: The brake domain controller generates an expected key based on the received seed key, and then matches the received anti-theft key with the expected key. After matching, if the two are consistent, the key matching is successful, and the system responds to the driver's operation request normally; if the two are inconsistent, the key matching fails, and the brake domain controller sends a request to trigger the anti-theft warning function (such as honking, flashing lights, etc.). At the same time, the brake domain controller sends instructions to the brake actuator and takes anti-theft measures, including increasing the brake clamping force and locking the wire control pedal.

[0046] During the key matching process, the brake domain controller and the electronic anti-theft controller generate the expected key and the anti-theft key respectively based on the same seed key and encryption algorithm, and judge the legitimacy of the operation by comparing the consistency of the two. Since the key is generated based on the dynamically generated seed key and the preset encryption algorithm, only legitimate requests (such as the unlock request sent by the driver through the remote control) can trigger the correct key generation process, thereby ensuring that the expected key is consistent with the actual key. The system determines it as a legitimate behavior and allows the vehicle to respond normally to the driver's operation request, including first releasing the steering wheel lock and clutch lock and allowing the vehicle to start. However, illegal operations (such as thieves trying to forcibly unlock or tow away the vehicle) cannot obtain the legitimate seed key or encryption algorithm, and the generated key is inconsistent with the expected key. The system determines it as an illegal behavior, triggers the anti-theft warning function, and sends instructions to the brake actuator to increase the brake clamping force to make the vehicle unable to move, and locks the wire control pedal to prevent it from rebounding to the initial position, thereby effectively preventing the vehicle from being illegally operated. Through this mechanism, the system can ensure the normal use of the vehicle when the key matching is successful, and take multiple anti-theft measures when the matching fails to prevent the vehicle from being forced to move and ensure vehicle safety.

[0047] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and features of the present invention so that people familiar with the technology in this field can understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle anti-theft system based on a wire control brake system, characterized in that: It includes an electronic anti-theft controller and a wire control system, wherein the wire control system includes a brake domain controller, a brake actuator and a wire control pedal; An electronic anti-theft controller, used to generate a dynamic seed key and an anti-theft key according to a request from a brake domain controller, and to exchange data with the brake domain controller; The brake domain controller is used to monitor the vehicle status signal in real time, generate the expected key based on the seed key from the electronic anti-theft controller, compare the key with the electronic anti-theft controller, and issue an instruction to execute the preset anti-theft measures according to the comparison result; the preset anti-theft measures include anti-theft warning and wheel braking; A brake actuator, used to perform braking operations and lock or unlock wheels according to instructions from a brake domain controller; The wire-controlled pedal is used to detect the driver's operating intention and lock or unlock the pedal according to the instructions of the brake domain controller.

2. The vehicle anti-theft system according to claim 1, characterized in that: The electronic anti-theft controller comprises: A seed key generation module, used for dynamically generating a seed key; An anti-theft key generation module, used to generate an anti-theft key based on a seed key and a preset encryption algorithm; A first communication module, used for exchanging data with the brake domain controller, including receiving a seed key request from the brake domain controller, and transmitting the seed key and the anti-theft key to the brake domain controller through an encrypted channel; The alarm trigger module receives the instruction from the brake domain controller and triggers the alarm device when the key comparison fails.

3. The vehicle anti-theft system according to claim 2, characterized in that: The brake domain controller comprises: A real-time monitoring module, used for real-time monitoring of unlocking key request, wheel speed sensor signal, brake pedal signal and inertial sensor signal; if any one or more of the unlocking key request, wheel speed sensor signal, brake pedal signal and inertial sensor signal is monitored, a subsequent verification mechanism is started; A second communication module is used to exchange data with the electronic anti-theft controller, the brake actuator and the wire control pedal; An expected key generation module, used to generate an expected key based on a received seed key and a preset encryption algorithm; The key comparison module is used to compare the expected key with the anti-theft key from the electronic anti-theft controller. If the match fails, the anti-theft measures are triggered.

4. The vehicle anti-theft system according to claim 1, characterized in that: The brake actuator is used to apply braking force to lock the wheels in the anti-theft mode to prevent the vehicle from being illegally moved.

5. The vehicle anti-theft system according to claim 1, characterized in that: The wire-controlled pedal comprises: A pedal force sensor module and / or a pedal travel sensor module, used to detect the driver's operation of the brake pedal and feed back to the brake domain controller; The locking execution module is used to lock or unlock the wire-controlled pedal according to the instruction of the brake domain controller.

6. A vehicle anti-theft method based on a wire control brake system, characterized in that: The following steps are involved: The electronic anti-theft controller and the brake domain controller exchange data through a preset communication mechanism; the brake domain controller monitors the unlocking key request, wheel speed sensor signal, brake pedal signal, and inertial sensor signal in real time; when the brake domain controller detects any of the following situations: unlocking key request, wheel speed sensor signal change, brake pedal force or travel signal change, and inertial sensor signal change, the following steps are performed: The brake domain controller sends a seed key request to the electronic anti-theft controller; The electronic anti-theft controller generates a seed key and generates an anti-theft key according to a preset encryption algorithm; The brake domain controller generates an expected key based on the seed key and a preset encryption algorithm; The brake domain controller compares the generated expected key with the immobilizer key from the electronic immobilizer controller; if the keys match, the vehicle is allowed to operate normally; If the key matching fails, anti-theft measures are triggered.

7. The method according to claim 6, characterized in that The brake pedal signal is a force signal from a brake pedal force sensor and / or a travel signal from a brake pedal travel sensor.

8. The method according to claim 6, characterized in that The anti-theft measures include: triggering an alarm device to alarm, controlling a brake actuator to apply a braking force, and locking a wire-controlled pedal.

9. The method according to claim 8, characterized in that Triggering the alarm device includes: starting the whistle and starting the flashing lights.

10. The method according to claim 6, characterized in that The seed key is a unique key generated dynamically; the electronic anti-theft controller and the brake domain controller generate the anti-theft key and the expected key through the same preset encryption algorithm.

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