Accelerator mistaken stepping prevention system for new energy passenger car and control method

Abstract

The invention provides a new energy passenger car accelerator mistaken stepping prevention system and a control method, and belongs to the technical field of accelerator mistaken stepping prevention. The new energy passenger car accelerator mistaken stepping prevention system comprises a display module, a radar module, a control module, an accelerator pedal position detection module, a car speed detection module and a motor controller. A driver inputs an accelerator mistaken stepping prevention function starting instruction to the control module through the display module; the radar module detects front obstacles and inputs distance information between the automobile and the obstacles to the control module; the accelerator pedal position detection module inputs accelerator pedal opening information to the control module in real time; the vehicle speed detection module detects the vehicle running speed and inputs vehicle running speed information to the control module; the control module judges whether a driver mistakenly steps on the accelerator or not according to the distance information between the automobile and the obstacle, the accelerator opening change rate calculated according to the accelerator pedal opening information and the automobile running speed information and generates a corresponding instruction according to the judgment result. The method has the advantages that the judgment result of mistakenly stepping on the accelerator by the driver is accurate, and the automobile safety is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of preventing accidental stepping of an accelerator, and in particular, relates to a system and a control method for preventing accidental stepping of an accelerator of a new energy passenger vehicle. Background Art

[0002] With the development of the automobile industry, new energy vehicles have been vigorously developed. At present, private cars are widely used in ordinary families. How to improve the driving safety of vehicles has become the focus of more and more attention. During the normal driving of the vehicle, when an emergency situation requires emergency braking, the driver may mistake the accelerator pedal for the brake pedal due to excessive tension, causing the vehicle to accelerate and cause more serious accidents.

[0003] Chinese patent 102139640A discloses a control system for accidental braking and accelerator pedaling with a switching function, which is composed of an intelligent control system for accidental braking and accelerator pedaling of a vehicle and a switching key. The intelligent control system for accidental braking and accelerator pedaling of a vehicle includes a display screen, a brake actuator, an oil supply actuator, a PLC, a pressure sensor, and a signal generator for accidental braking and accelerator pedaling of a vehicle. The control system is in a permanent state, and when an abnormal accelerator pedaling occurs, the acceleration can be automatically converted into braking instantly; however, if the vehicle is accelerated during overtaking in this state, the accelerator pedaling force must be controlled within the range set in advance by the PLC. Improper control can easily cause an accident.

[0004] The above patent only uses a pressure sensor to determine whether the driver has stepped on the accelerator by mistake. The judgment accuracy is low and it is easy to make wrong judgments and affect the driver's driving of the car. Summary of the invention

[0005] The present invention aims to provide a system and a control method for preventing accidental stepping on the accelerator of a new energy passenger vehicle, so as to achieve the technical purpose of providing protection for the safety of the vehicle when the driver accidentally steps on the accelerator.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a system for preventing accidental stepping of the accelerator of a new energy passenger vehicle, comprising a display module, a radar module, a control module, an accelerator pedal position detection module, a vehicle speed detection module and a motor controller, wherein the output end of the display module is connected to the input end of the control module, the output end of the control module is connected to the input end of the display module, the output end of the radar module is connected to the input end of the control module, the output end of the accelerator pedal position detection module is connected to the input end of the control module, the output end of the vehicle speed detection module is connected to the input end of the control module, and the output end of the control module is connected to the input end of the motor controller.

[0008] The display module outputs control instructions to the control module, the control module outputs alarm information to the display module, the radar module inputs external information to the control module, the accelerator pedal position detection module inputs accelerator pedal opening information to the control module, the vehicle speed detection module inputs vehicle driving speed information to the control module, and the control module outputs control instructions to the motor controller.

[0009] The control module adopts a vehicle controller.

[0010] The accelerator pedal position detection module uses an accelerator pedal angular displacement sensor, and the number of the accelerator pedal angular displacement sensors is two.

[0011] The display module adopts a vehicle-mounted display screen, and the vehicle-mounted display screen is connected to a speaker.

[0012] The present invention provides a control method for a throttle mis-stepping prevention system for a new energy passenger vehicle:

[0013] Step 1: The driver inputs the throttle anti-misoperation function activation command to the control module through the display module;

[0014] Step 2: The radar module detects the obstacle ahead and inputs the distance information between the car and the obstacle to the control module; the accelerator pedal position detection module inputs the accelerator pedal opening information to the control module in real time; the vehicle speed detection module detects the vehicle speed and inputs the vehicle speed information to the control module;

[0015] Step 3: The control module determines whether the driver has stepped on the accelerator by mistake based on the distance information between the car and the obstacle, the accelerator opening rate calculated by the accelerator pedal opening information, and the car's driving speed information, and generates corresponding instructions based on the judgment result.

[0016] In step 2, the accelerator pedal position sensor collects accelerator pedal opening information through two accelerator pedal angular displacement sensors and inputs it into the control module.

[0017] In step three, the control module selects the accelerator pedal opening information with a smaller accelerator opening of the two accelerator pedal opening information as the accelerator pedal opening information reference, and the control module calculates the accelerator opening change rate according to the smaller accelerator pedal opening information.

[0018] In step three, when the control module determines that the driver has stepped on the accelerator by mistake, the control module stops outputting control instructions to the motor controller and outputs an alarm message to the display module.

[0019] The technical effects of the present invention are:

[0020] (1) The present invention determines whether the driver has stepped on the accelerator by mistake by using multiple elements such as the distance information between the vehicle and the obstacle, the rate of change of the accelerator opening, and the vehicle's driving speed. The judgment result is accurate, thereby improving the safety of vehicle driving.

[0021] (2) The radar module of the present invention adopts a vehicle-mounted laser radar, which improves the detection distance of the car and provides a guarantee for triggering the anti-misstepping function of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] This specification includes the following drawings, which show the following contents:

[0023] Figure 1 This is a logical structure diagram of a system and control method for preventing accidental stepping of the accelerator of a new energy passenger vehicle according to the present invention;

[0024] Figure 1 The markings are: 1. display module; 2. radar module; 3. control module; 4. accelerator pedal position detection module; 5. vehicle speed detection module; 6. motor controller. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and facilitating their implementation.

[0026] The present invention provides a system for preventing accidental stepping of the accelerator of a new energy passenger vehicle, comprising a display module 1, a radar module 2, a control module 3, an accelerator pedal position detection module 4, a vehicle speed detection module 5 and a motor controller 6, wherein the output end of the display module 1 is connected to the input end of the control module 3, the output end of the control module 3 is connected to the input end of the display module 1, the output end of the radar module 2 is connected to the input end of the control module 3, the output end of the accelerator pedal position detection module 4 is connected to the input end of the control module 3, the output end of the vehicle speed detection module 5 is connected to the input end of the control module 3, and the output end of the control module 3 is connected to the input end of the motor controller 6.

[0027] The display module 1 outputs control instructions to the control module 3, the control module 3 outputs alarm information to the display module 1, the radar module 2 inputs external information to the control module 3, the accelerator pedal position detection module 4 inputs accelerator pedal opening information to the control module 3, the vehicle speed detection module 5 inputs vehicle driving speed information to the control module 3, and the control module 3 outputs control instructions to the motor controller 6.

[0028] The control module 3 adopts the vehicle controller.

[0029] The accelerator pedal position detection module 4 uses an accelerator pedal angular displacement sensor, and the number of the accelerator pedal angular displacement sensors is two.

[0030] The display module 1 adopts a vehicle-mounted display screen, and the vehicle-mounted display screen is connected to a speaker.

[0031] The present invention provides a control method for a throttle mis-stepping prevention system for a new energy passenger vehicle:

[0032] Step 1: The driver inputs the accelerator anti-misoperation function activation instruction to the control module 3 through the display module 1;

[0033] Step 2: The radar module 2 detects the obstacle ahead and inputs the distance information between the car and the obstacle to the control module 3; the accelerator pedal position detection module 4 inputs the accelerator pedal opening information to the control module 3 in real time; the vehicle speed detection module 5 detects the vehicle speed and inputs the vehicle speed information to the control module 3;

[0034] Step 3: The control module 3 determines whether the driver has stepped on the accelerator by mistake based on the distance information between the car and the obstacle, the accelerator opening rate calculated by the accelerator pedal opening information, and the car's driving speed information, and generates a corresponding instruction based on the judgment result.

[0035] In step 2, the accelerator pedal position sensor collects accelerator pedal opening information through two accelerator pedal angular displacement sensors and inputs the information to the control module 3.

[0036] In step three, the control module 3 selects the accelerator pedal opening information with a smaller accelerator opening degree among the two accelerator pedal opening degree information as the accelerator pedal opening degree information reference, and the control module 3 calculates the accelerator opening degree change rate according to the smaller accelerator pedal opening degree information.

[0037] In step three, when the control module 3 determines that the driver has stepped on the accelerator by mistake, the control module 3 stops outputting control instructions to the motor controller 6 and outputs alarm information to the display module 1 .

[0038] The following is a detailed description of a system and control method for preventing accidental stepping of the accelerator pedal of a new energy passenger vehicle according to the present invention.

[0039] The present invention discloses a new energy passenger vehicle throttle misstepping prevention system, which includes a display module 1, a radar module 2, a control module 3, a motor controller 6 and an accelerator pedal position detection module 4. The display module 1 uses a vehicle-mounted display screen, which is used to input the throttle misstepping prevention function activation instruction to the control module 3. At the same time, when the control module 3 determines that the driver has misstepped the accelerator, the accelerator misstepping icon on the vehicle-mounted display screen lights up. The vehicle-mounted display screen is connected to a speaker, which is used to sound an alarm when the driver missteps the accelerator. The radar module 2 uses a vehicle-mounted laser radar, which is used to detect the distance between the car and the obstacle. The advantage of the vehicle-mounted laser radar is that it can achieve long-distance detection. The control module 3 uses a vehicle controller, which is used to process the information input by the radar module 2, the accelerator pedal position detection module 4 and the vehicle speed detection module 5 and determine whether the driver has misstepped the accelerator. The vehicle controller in the embodiment of the present invention uses the VCU8 model vehicle controller of UMC. The accelerator pedal position detection module 4 includes two accelerator pedal angular displacement sensors, which are used to detect the opening information of the accelerator pedal. The vehicle speed detection module 5 uses an electromagnetic induction vehicle speed sensor to collect vehicle speed information. The motor controller 6 uses a microcontroller to execute the control instructions of the control module 3. Specifically, the control module 3 controls the torque and speed of the vehicle motor through the microcontroller. The model of the microcontroller in the embodiment of the present invention is CKS32F030C6T6.

[0040] The output end of the vehicle display is connected to the input end of the vehicle controller through the CAN bus, the output end of the vehicle controller is connected to the input end of the vehicle display through the CAN bus, the vehicle display is connected to the speaker through the CAN bus, the output end of the vehicle lidar is connected to the input end of the vehicle controller through the CAN bus, the output end of the accelerator pedal angular displacement sensor is connected to the input end of the vehicle controller through the CAN bus, the output end of the electromagnetic induction vehicle speed sensor is connected to the input end of the vehicle controller through the CAN bus, and the output end of the vehicle controller is connected to the input end of the microcontroller through the CAN bus.

[0041] A control method of a new energy passenger vehicle throttle mis-stepping prevention system of the present invention is as follows:

[0042] After the vehicle is powered on, the driver inputs the accelerator mis-stepping prevention function activation information to the control module 3 through the display module 1, and the control module 3 activates the accelerator mis-stepping prevention function to monitor in real time whether the driver has mis-stepped the accelerator.

[0043] The radar module 2 detects the obstacle ahead and inputs the distance information between the car and the obstacle to the control module 3; the two accelerator pedal angular displacement sensors respectively detect the position of the accelerator pedal and input the accelerator pedal opening information to the control module 3 in real time; in order to obtain a smooth accelerator opening curve, the present invention performs a first-order low-pass filtering process on the collected accelerator pedal opening information, and the formula is as follows:

[0044] Acc(t)=aAcc i (t)+(1-a)Acc0(t-1)

[0045] Where Acc(t) is the calculated value of the accelerator pedal opening voltage signal, Acc i (t) is the currently collected accelerator pedal opening voltage signal value, Acc0(t-1) is the accelerator pedal opening voltage signal value at the previous moment, and a is the filter coefficient. The acquisition frequency of the accelerator pedal angular displacement sensor in the embodiment of the present invention is 1000 Hz per second.

[0046] In the embodiment of the present invention, the filter coefficient is set to 0.5.

[0047] The control module 3 compares the calculated values ​​of the accelerator pedal opening voltage signals collected by the two accelerator pedal angular displacement sensors, selects the value with the smaller calculated value of the voltage signal as the reference value, and calculates the accelerator opening change rate, the formula is as follows:

[0048]

[0049] Where d(Acc(t)) is the throttle opening change rate, Acc(t) is the current throttle pedal opening voltage signal calculation value, Acc(t-1) is the throttle pedal opening voltage signal calculation value at the previous moment, and Δt is the acquisition period.

[0050] In the embodiment of the present invention, Δt is 40 ms.

[0051] The electromagnetic induction vehicle speed sensor collects the vehicle speed information and inputs it into the control module 3.

[0052] The control module 3 determines whether the driver has stepped on the accelerator by mistake according to the distance information between the car and the obstacle, the accelerator opening rate and the car's driving speed. Taking the embodiment as an example,

[0053] When the vehicle speed is greater than 30 km / h, the distance between the vehicle and the obstacle is less than 15 m, and the throttle opening change rate is greater than 0.75% / ms, the control module 3 determines that the driver has stepped on the accelerator by mistake;

[0054] When the vehicle speed is greater than 30 km / h, the distance between the vehicle and the obstacle is greater than 15 m, and the throttle opening change rate is greater than 1% / ms, the control module 3 determines that the driver has stepped on the accelerator by mistake;

[0055] When the vehicle speed is less than 30 km / h, the distance between the vehicle and the obstacle is less than 15 m, and the throttle opening change rate is greater than 0.5% / ms, the control module 3 determines that the driver has stepped on the accelerator by mistake;

[0056] When the vehicle speed is less than 30 km / h, the distance between the vehicle and the obstacle is greater than 15 m, and the throttle opening change rate is greater than 0.625% / ms, the control module 3 determines that the driver has stepped on the accelerator by mistake;

[0057] When the control module 3 determines that the driver has accidentally stepped on the accelerator, the control module 3 stops outputting control instructions to the motor controller 6 and outputs an alarm message to the display module 1; specifically, the control module 3 stops outputting the vehicle's speed and torque control instructions to the motor controller 6, and outputs an alarm message to light up the accelerator accidental step icon on the vehicle display screen and control the speaker to emit an alarm tone.

[0058] After the car's throttle anti-misstep function is triggered, it will last for 0.5S. When you step on the accelerator again, the car will re-judge whether the accelerator is stepped on by mistake. If the accelerator misstep judgment conditions are not met, the car will work normally, the misstep accelerator icon on the car's instrument screen will go out, and the speaker will stop alarming.

[0059] The present invention determines whether the driver has stepped on the accelerator by mistake through multiple elements such as the distance information between the car and the obstacle, the rate of change of the accelerator opening, and the speed of the car. The judgment result is accurate, thereby improving the safety of car driving. The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above-mentioned concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A system for preventing accidental stepping on the accelerator of a new energy passenger vehicle, characterized in that: It includes a display module, a radar module, a control module, an accelerator pedal position detection module, a vehicle speed detection module and a motor controller, wherein the output end of the display module is connected to the input end of the control module, the output end of the control module is connected to the input end of the display module, the output end of the radar module is connected to the input end of the control module, the output end of the accelerator pedal position detection module is connected to the input end of the control module, the output end of the vehicle speed detection module is connected to the input end of the control module, and the output end of the control module is connected to the input end of the motor controller.

2. A new energy passenger vehicle throttle anti-misstepping system as claimed in claim 1, characterized in that: The display module outputs control instructions to the control module, the control module outputs alarm information to the display module, the radar module inputs external information to the control module, the accelerator pedal position detection module inputs accelerator pedal opening information to the control module, the vehicle speed detection module inputs vehicle driving speed information to the control module, and the control module outputs control instructions to the motor controller.

3. The accelerator anti-misoperation system for new energy passenger vehicles according to claim 1, characterized in that: The control module adopts a vehicle controller.

4. The accelerator anti-misoperation system for new energy passenger vehicles according to claim 1, characterized in that: The accelerator pedal position detection module uses an accelerator pedal angular displacement sensor, and the number of the accelerator pedal angular displacement sensors is two.

5. The accelerator anti-misoperation system for new energy passenger vehicles according to claim 1, characterized in that: The display module adopts a vehicle-mounted display screen, and the vehicle-mounted display screen is connected to a speaker.

6. A control method for the accelerator mis-stepping prevention system for a new energy passenger vehicle as claimed in any one of claims 1 to 5, characterized in that: Step 1: The driver inputs the throttle anti-misoperation function activation command to the control module through the display module; Step 2: The radar module detects the obstacle ahead and inputs the distance information between the car and the obstacle to the control module; the accelerator pedal position detection module inputs the accelerator pedal opening information to the control module in real time; the vehicle speed detection module detects the vehicle speed and inputs the vehicle speed information to the control module; Step 3: The control module determines whether the driver has stepped on the accelerator by mistake based on the distance information between the car and the obstacle, the accelerator opening rate calculated by the accelerator pedal opening information, and the car's driving speed information, and generates corresponding instructions based on the judgment result.

7. A control method for the accelerator mis-stepping prevention system for a new energy passenger vehicle as claimed in claim 6, characterized in that: In step 2, the accelerator pedal position sensor collects accelerator pedal opening information through two accelerator pedal angular displacement sensors and inputs it into the control module.

8. A control method for the accelerator mis-stepping prevention system for a new energy passenger vehicle as claimed in claim 6 or 7, characterized in that: In step three, the control module selects the accelerator pedal opening information with a smaller accelerator opening of the two accelerator pedal opening information as the accelerator pedal opening information reference, and the control module calculates the accelerator opening change rate according to the smaller accelerator pedal opening information.

9. A control method for the accelerator mis-stepping prevention system for a new energy passenger vehicle as claimed in claim 6, characterized in that: In step three, when the control module determines that the driver has stepped on the accelerator by mistake, the control module stops outputting control instructions to the motor controller and outputs an alarm message to the display module.

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