Electric two-wheeled vehicle up-down ramp safety pre-warning system based on anti-slip function

Abstract

The invention relates to the field of electric vehicles, aims to solve the problem of potential safety hazards caused by limited braking and power performance of an electric two-wheeled vehicle, and particularly relates to an electric two-wheeled vehicle up-down ramp safety pre-warning system based on an anti-slip function. According to the invention, collection is carried out according to the current driving speed, the acceleration, the vehicle load and the road slope condition of the electric two-wheeled vehicle, analysis and calculation are carried out through the acceleration and the slope angle, the vehicle load is obtained, the carrying number of vehicle sensor hardware is reduced, and the manufacturing cost of the vehicle is reduced; the driving risk warning of the electric two-wheeled vehicle is generated according to the collected data analysis result, a driver is reminded according to the driving risk warning, the driver is assisted in judging the driving risk of the vehicle, and therefore the vehicle is controlled in time, accidents are avoided, and when the driving risk warning is generated, the driving risk warning of the electric two-wheeled vehicle is avoided. According to different driving risk warnings, automatic intelligent control is carried out through a preset algorithm, and driving safety is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of electric vehicles, and in particular to an uphill and downhill safety warning system for electric two-wheeled vehicles based on an anti-slip function. Background Art

[0002] With the popularity of electric two-wheelers, electric two-wheelers have become an environmentally friendly and convenient means of transportation, and are loved by consumers. Electric vehicles are pure electric vehicles that are powered by batteries and driven by DC, AC, series-excited, and externally-excited motors. In recent years, battery vehicles have replaced bicycles in many cities and become the main means of travel for many families because of their advantages such as energy saving, environmental protection, low price, high speed, and no noise pollution. With the deepening of the concept of energy saving and environmental protection, car owners are also increasingly fond of using battery vehicles instead of cars for travel;

[0003] At present, the electric two-wheeled vehicles in the prior art still have some shortcomings. In actual use, the electric two-wheeled vehicles cannot maintain balance when stationary and have limited braking performance and power. When going up and down slopes, there is a possibility of insufficient power leading to parking, tipping and sliding on the slope. When going downhill, the vehicle speed may be too fast due to its own gravity, thus causing safety hazards. Therefore, improving the safety performance of the vehicle is a problem to be solved at present;

[0004] In view of the above technical problems, this application proposes a solution. Summary of the invention

[0005] In the present invention, data is collected based on the current driving speed, acceleration, vehicle load and road slope of the electric two-wheeled vehicle, and the vehicle load is obtained by analyzing and calculating the acceleration and slope angle, thereby reducing the number of vehicle sensor hardware installed and reducing the manufacturing cost of the vehicle. A driving risk warning for the electric two-wheeled vehicle is generated based on the analysis results of the collected data, and the driver is reminded based on the driving risk warning to assist the driver in judging the driving risk of the vehicle, thereby making timely control of the vehicle to avoid accidents. When the driving risk warning is generated, automatic intelligent control is performed through a preset algorithm based on different driving risk warnings, thereby improving the intelligence level of the electric two-wheeled vehicle, ensuring driving safety, and solving the problem of safety hazards caused by limited braking and power performance of the electric two-wheeled vehicle, and proposing an uphill and downhill safety warning system for electric two-wheeled vehicles based on an anti-slip function.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] The electric two-wheeled vehicle uphill and downhill safety warning system based on the anti-slip function comprises an angle monitoring unit, which is used to monitor the driving angle of the electric two-wheeled vehicle and judge the driving state of the electric two-wheeled vehicle;

[0008] A speed monitoring unit, which is used to monitor the speed state of the electric two-wheeled vehicle and obtain the running speed and acceleration of the electric two-wheeled vehicle;

[0009] A weight monitoring unit, wherein the weight monitoring unit calculates the vehicle load of the electric two-wheeled vehicle according to the driving speed, acceleration and driving state;

[0010] A vehicle dynamics management unit, which obtains a variety of monitoring data through an angle monitoring unit, a speed monitoring unit, and a weight monitoring unit, performs quantitative analysis and threshold judgment based on the monitoring data, and generates a corresponding early warning reminder signal based on the judgment result;

[0011] A control warning unit receives warnings through the vehicle dynamic management unit, and gives reminders for the warnings, while performing anti-slip and safety control on the electric two-wheeled vehicle.

[0012] As a preferred embodiment of the present invention, the angle monitoring unit monitors the driving angle of the electric two-wheeled vehicle during driving. When the slope angle is greater than a preset angle range, it is recorded as an uphill state; when the slope angle is less than the preset angle range, it is recorded as a flat ground state; when the slope angle is negative and the angle is less than the preset angle range, it is in a downhill state, and the uphill state, flat ground state, downhill state and slope angle are sent to the vehicle dynamic management unit.

[0013] As a preferred embodiment of the present invention, the speed monitoring unit obtains the driving speed of the electric two-wheeled vehicle through a speed sensor, and calculates the acceleration of the electric two-wheeled vehicle according to the change of the driving speed per unit time. The speed monitoring unit sends the driving speed and acceleration of the electric two-wheeled vehicle to the vehicle dynamic management unit, and the speed monitoring unit sends the acceleration of the electric two-wheeled vehicle to the weight monitoring unit.

[0014] As a preferred embodiment of the present invention, the weight monitoring unit obtains the slope of the vehicle through the angle monitoring unit, and obtains the real-time acceleration and driving speed of the electric two-wheeled vehicle through the speed monitoring unit when the vehicle is on flat ground. At the same time, the weight monitoring unit obtains the power proportion of the electric two-wheeled vehicle at this moment through the sensor, wherein the power proportion is the proportion of the current output power of the motor of the electric two-wheeled vehicle to the maximum output power of the electric two-wheeled vehicle. The weight monitoring unit generates the vehicle load by analyzing the power proportion, acceleration record and driving speed through a formula. When the electric two-wheeled vehicle is driving on flat ground, the weight monitoring unit calculates the vehicle load once at a preset interval and sends the latest vehicle load to the vehicle dynamic management unit.

[0015] As a preferred embodiment of the present invention, when the vehicle dynamics management unit obtains through the angle monitoring unit that the vehicle is in a flat state, it does not react. When the vehicle dynamics management unit obtains that the driving state of the vehicle changes from a flat state or a downhill state to an uphill state, the vehicle dynamics management unit fixes the vehicle load, obtains the slope angle of the vehicle in the uphill state, and simultaneously obtains the current running speed of the vehicle, generates a vehicle driving warning value through formula analysis, and the vehicle dynamics management unit compares the vehicle driving warning value X with a preset warning threshold. If the vehicle driving warning value is less than or equal to the preset warning threshold, no reaction is made. If the vehicle driving warning value is greater than the preset warning threshold, a stop warning is generated.

[0016] As a preferred embodiment of the present invention, after generating the stop warning, the vehicle dynamic management unit obtains the minimum driving warning value through a formula for the vehicle power ratio and the vehicle load, and the vehicle dynamic management unit compares the minimum driving warning value with the warning threshold again. If the minimum driving warning value is less than the preset warning threshold, the stop warning continues to be generated. If the minimum driving warning value is greater than or equal to the warning threshold, a power shortage warning is generated, and the stop warning and the power shortage warning are sent to the control warning unit;

[0017] The control warning unit generates a power increase reminder signal after obtaining a stop warning, and generates a power shortage reminder signal after obtaining a power shortage warning;

[0018] After obtaining the stop warning and the insufficient power warning, the control warning unit monitors the driving signal of the electric two-wheeled vehicle through the speed monitoring unit. When the speed of the electric two-wheeled vehicle is reduced to 0, the electric two-wheeled vehicle is recorded as a stationary state, and after entering the stationary state, the acceleration, slope angle, driving speed and motor running direction of the electric two-wheeled vehicle are monitored. If the motor running direction of the electric two-wheeled vehicle is to rotate backward and there is acceleration, the slope angle is greater than the preset slope threshold and the driving speed is less than the preset speed, it is determined that the electric two-wheeled vehicle is in a sliding slope state, and the motor reaction force is driven to prevent the sliding slope phenomenon.

[0019] As a preferred embodiment of the present invention, when the vehicle dynamic management unit obtains that the driving state of the vehicle changes from a flat ground state or an uphill state to a downhill state, the vehicle load is fixed, and the vehicle dynamic management unit calculates the downhill risk value of the vehicle according to the downhill slope angle of the vehicle and the current running speed of the vehicle. The vehicle management unit compares the downhill risk value with a preset risk threshold. If the downhill risk value is greater than or equal to the preset risk threshold, a high-speed risk warning is generated. If the downhill risk value is less than the preset risk threshold, no response is made.

[0020] After generating the high-speed risk warning, the vehicle dynamic management unit sends the high-speed risk warning to the control warning unit. The control warning unit decelerates the motor by applying a reaction force to the motor. After the motor decelerates, the vehicle dynamic management unit recalculates the new downhill risk value. If the new downhill risk value is less than the preset risk threshold, a deceleration completion signal is generated. If the new downhill risk value is greater than or equal to the preset risk threshold, the high-speed risk warning continues to be generated, and the high-speed risk warning or deceleration completion signal is continuously sent to the control warning unit. The control warning unit generates a braking warning after obtaining the high-speed risk warning.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, during the driving of the electric two-wheeled vehicle, a comprehensive analysis is performed based on the current driving speed, vehicle load and road slope of the electric two-wheeled vehicle, so that a driving risk warning of the electric two-wheeled vehicle is generated according to the analysis result, and the driver is reminded according to the driving risk warning to assist the driver in judging the driving risk of the vehicle, so as to make timely control of the vehicle to avoid accidents.

[0023] 2. In the present invention, when a driving risk warning is generated, automatic intelligent control is performed through a preset algorithm according to different driving risk warnings, thereby improving the intelligence level of the electric two-wheeled vehicle and ensuring driving safety.

[0024] 3. In the present invention, when monitoring the load of an electric two-wheeled vehicle, the acceleration and slope angle are analyzed and calculated to obtain the vehicle load and realize data regeneration, thereby reducing the number of vehicle sensor hardware installed, reducing the manufacturing cost of the vehicle and realizing data collection and monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0026] Figure 1 is a system block diagram of the present invention;

[0027] Figure 2 It is a system flow chart of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] See also Figure 1 - Figure 2 As shown, the electric two-wheeled vehicle uphill and downhill safety warning system based on the anti-slip function includes an angle monitoring unit, a speed monitoring unit, a weight monitoring unit, a vehicle dynamic management unit and a control warning unit, wherein the angle monitoring unit monitors the driving angle of the electric two-wheeled vehicle during driving, determines whether the electric two-wheeled vehicle is currently in an uphill state, a flat ground state or a downhill state according to the monitored driving angle, and sends the uphill state, flat ground state, downhill state and slope angle to the vehicle dynamic management unit;

[0031] The speed monitoring unit obtains the driving speed of the electric two-wheeled vehicle through the speed sensor, and calculates the acceleration of the electric two-wheeled vehicle according to the change of the driving speed per unit time. The speed monitoring unit sends the driving speed and acceleration of the electric two-wheeled vehicle to the vehicle dynamic management unit, and the speed monitoring unit sends the acceleration of the electric two-wheeled vehicle to the weight monitoring unit.

[0032] The weight monitoring unit obtains the slope of the vehicle through the angle monitoring unit, and obtains the real-time acceleration and driving speed of the electric two-wheeled vehicle through the speed monitoring unit when the vehicle is on flat ground. At the same time, the weight monitoring unit obtains the power proportion of the electric two-wheeled vehicle at this moment through the sensor, where the power proportion is the proportion of the current output power of the motor of the electric two-wheeled vehicle to the maximum output power of the electric two-wheeled vehicle. The weight monitoring unit records the power proportion as P, the acceleration as a, and the driving speed as b, and generates the vehicle load M through formula analysis. Wherein, q is a preset weight coefficient, the value range of q is greater than 1, j is a preset constant term, the value of j is related to the self-weight of the electric two-wheeled vehicle and the tire friction, and the weight monitoring unit calculates the vehicle load M once at every preset time interval when the electric two-wheeled vehicle is on a flat ground, and sends the latest vehicle load M to the vehicle dynamic management unit;

[0033] When the vehicle dynamics management unit obtains the vehicle in a flat state through the angle monitoring unit, it does not respond. When the vehicle dynamics management unit obtains that the vehicle's driving state changes from a flat state or a downhill state to an uphill state, the vehicle dynamics management unit fixes the vehicle load M, obtains the slope angle θ of the vehicle in the uphill state, and obtains the current running speed V of the vehicle, and generates the vehicle driving warning value X through formula analysis. The vehicle dynamic management unit compares the vehicle driving warning value X with the preset warning threshold. If the vehicle driving warning value X is less than or equal to the preset warning threshold, no response is made. If the vehicle driving warning value X is greater than the preset warning threshold, a stop warning is generated.

[0034] After generating the stop warning, the vehicle dynamic management unit obtains the vehicle power proportion P, and obtains the minimum driving warning value X1 through the formula, X1=M*P. The vehicle dynamic management unit compares the minimum driving warning value X1 with the warning threshold again. If the minimum driving warning value X1 is less than the preset warning threshold, the stop warning continues to be generated. If the minimum driving warning value X1 is greater than or equal to the warning threshold, a power shortage warning is generated, and the stop warning and power shortage warning are sent to the control warning unit;

[0035] After obtaining the stop warning, the control warning unit generates a power increase reminder signal, and displays the power increase reminder signal through the display screen. After obtaining the power shortage warning, the control warning unit generates a power shortage reminder signal, and displays the power shortage reminder signal through the display screen.

[0036] After obtaining the stop warning and the insufficient power warning, the control warning unit operates the anti-slope sliding signal. The operation method of the anti-slope sliding signal is as follows: the electric two-wheeled vehicle driving signal is monitored by the speed monitoring unit. When the speed of the electric two-wheeled vehicle is reduced to 0, the electric two-wheeled vehicle is recorded as a stationary state, and after entering the stationary state, the acceleration, slope angle, driving speed and motor running direction of the electric two-wheeled vehicle are monitored. If the motor running direction of the electric two-wheeled vehicle is to rotate backward and there is acceleration, the slope angle is greater than the preset slope threshold and the driving speed is less than the preset speed, it is determined that the electric two-wheeled vehicle is in a slope sliding state. The vehicle controller of the electric two-wheeled vehicle in the slope sliding state adjusts the motor running direction by setting the speed loop closed-loop PI value to 0, and drives the motor reaction force through the motor ABC three-phase alternating phase replacement or two-phase phase replacement method to offset the rear sliding force to prevent the slope sliding phenomenon.

[0037] Embodiment 2:

[0038] See also Figure 1 - Figure 2 As shown, when the vehicle dynamics management unit obtains that the driving state of the vehicle changes from a flat ground state or an uphill state to a downhill state, the vehicle load M is fixed, the vehicle dynamics management unit obtains the downhill slope angle β of the vehicle, and the current running speed V of the vehicle. The vehicle management unit calculates the downhill risk value Y of the vehicle, and the downhill risk value Y, Y=M 2 Vβ, the vehicle management unit compares the downhill risk value Y with the preset risk threshold. If the downhill risk value Y is greater than or equal to the preset risk threshold, a high-speed risk warning is generated. If the downhill risk value Y is less than the preset risk threshold, no response is made;

[0039] After generating the high-speed risk warning, the vehicle dynamic management unit sends the high-speed risk warning to the control warning unit. The control warning unit decelerates the motor by applying a reaction force to the motor. After the motor decelerates, the vehicle dynamic management unit recalculates a new downhill risk value Yi, i=1, 2, 3…, n. If the new downhill risk value Yi is less than the preset risk threshold, a deceleration completion signal is generated. If the new downhill risk value Yi is greater than or equal to the preset risk threshold, a high-speed risk warning is continuously generated, and the high-speed risk warning or deceleration completion signal is continuously sent to the control warning unit.

[0040] The control warning unit generates a brake warning after obtaining a high-speed risk warning, and displays the brake warning through a display device.

[0041] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An electric two-wheeled vehicle uphill and downhill safety warning system based on the anti-slip function, characterized in that: An angle monitoring unit is included, and the angle monitoring unit is used to monitor the driving angle of the electric two-wheeled vehicle and determine the driving state of the electric two-wheeled vehicle; A speed monitoring unit, which is used to monitor the speed state of the electric two-wheeled vehicle and obtain the running speed and acceleration of the electric two-wheeled vehicle; A weight monitoring unit, wherein the weight monitoring unit calculates the vehicle load of the electric two-wheeled vehicle according to the driving speed, acceleration and driving state; A vehicle dynamics management unit, which obtains a variety of monitoring data through an angle monitoring unit, a speed monitoring unit, and a weight monitoring unit, performs quantitative analysis and threshold judgment based on the monitoring data, and generates a corresponding early warning reminder signal based on the judgment result; A control warning unit receives warnings through the vehicle dynamic management unit, and gives reminders for the warnings, while performing anti-slip and safety control on the electric two-wheeled vehicle.

2. The electric two-wheeled vehicle uphill and downhill safety warning system based on the anti-slip function according to claim 1 is characterized in that: The angle monitoring unit monitors the driving angle of the electric two-wheeled vehicle during driving. When the slope angle is greater than a preset angle range, it is recorded as an uphill state. When the slope angle is less than the preset angle range, it is recorded as a flat ground state. When the slope angle is a negative number and the angle is less than the preset angle range, it is in a downhill state. The uphill state, flat ground state, downhill state and slope angle are sent to the vehicle dynamic management unit.

3. The electric two-wheeled vehicle uphill and downhill safety warning system based on the anti-slip function according to claim 1 is characterized in that: The speed monitoring unit obtains the driving speed of the electric two-wheeled vehicle through a speed sensor, and calculates the acceleration of the electric two-wheeled vehicle according to the change of the driving speed per unit time. The speed monitoring unit sends the driving speed and acceleration of the electric two-wheeled vehicle to the vehicle dynamic management unit, and the speed monitoring unit sends the acceleration of the electric two-wheeled vehicle to the weight monitoring unit.

4. The electric two-wheeled vehicle uphill and downhill safety warning system based on the anti-slip function according to claim 1 is characterized in that: The weight monitoring unit obtains the slope of the vehicle through the angle monitoring unit, and obtains the real-time acceleration and driving speed of the electric two-wheeled vehicle through the speed monitoring unit when the vehicle is on flat ground. At the same time, the weight monitoring unit obtains the power proportion of the electric two-wheeled vehicle at this moment through the sensor, wherein the power proportion is the proportion of the current output power of the motor of the electric two-wheeled vehicle to the maximum output power of the electric two-wheeled vehicle. The weight monitoring unit generates the vehicle load by analyzing the power proportion, acceleration record and driving speed through a formula. When the electric two-wheeled vehicle is driving on flat ground, the weight monitoring unit calculates the vehicle load once at a preset interval and sends the latest vehicle load to the vehicle dynamic management unit.

5. The electric two-wheeled vehicle uphill and downhill safety warning system based on the anti-slip function according to claim 1 is characterized in that: When the vehicle dynamics management unit obtains through the angle monitoring unit that the vehicle is in a flat ground state, the vehicle dynamics management unit does not react. When the vehicle dynamics management unit obtains that the driving state of the vehicle changes from a flat ground state or a downhill state to an uphill state, the vehicle dynamics management unit fixes the vehicle load, obtains the slope angle of the vehicle in the uphill state, and simultaneously obtains the current running speed of the vehicle, and generates a vehicle driving warning value through formula analysis. The vehicle dynamics management unit compares the vehicle driving warning value X with a preset warning threshold value. If the vehicle driving warning value is less than or equal to the preset warning threshold value, no reaction is made. If the vehicle driving warning value is greater than the preset warning threshold value, a stop warning is generated.

6. The electric two-wheeled vehicle uphill and downhill safety warning system based on the anti-slip function according to claim 1 is characterized in that: After generating the stop warning, the vehicle dynamic management unit obtains the minimum driving warning value through a formula for the vehicle power ratio and the vehicle load, and the vehicle dynamic management unit compares the minimum driving warning value with the warning threshold again. If the minimum driving warning value is less than the preset warning threshold, the stop warning continues to be generated. If the minimum driving warning value is greater than or equal to the warning threshold, a power shortage warning is generated, and the stop warning and the power shortage warning are sent to the control warning unit; The control warning unit generates a power increase reminder signal after obtaining a stop warning, and generates a power shortage reminder signal after obtaining a power shortage warning; After obtaining the stop warning and the insufficient power warning, the control warning unit monitors the driving signal of the electric two-wheeled vehicle through the speed monitoring unit. When the speed of the electric two-wheeled vehicle is reduced to 0, the electric two-wheeled vehicle is recorded as a stationary state, and after entering the stationary state, the acceleration, slope angle, driving speed and motor running direction of the electric two-wheeled vehicle are monitored. If the motor running direction of the electric two-wheeled vehicle is to rotate backward and there is acceleration, the slope angle is greater than the preset slope threshold and the driving speed is less than the preset speed, it is determined that the electric two-wheeled vehicle is in a sliding slope state, and the motor reaction force is driven to prevent the sliding slope phenomenon.

7. The electric two-wheeled vehicle uphill and downhill safety warning system based on the anti-slip function according to claim 1 is characterized in that: When the vehicle dynamic management unit obtains that the driving state of the vehicle changes from a flat ground state or an uphill state to a downhill state, the vehicle load is fixed, and the vehicle dynamic management unit calculates the downhill risk value of the vehicle according to the downhill slope angle of the vehicle and the current running speed of the vehicle. The vehicle management unit compares the downhill risk value with a preset risk threshold. If the downhill risk value is greater than or equal to the preset risk threshold, a high-speed risk warning is generated. If the downhill risk value is less than the preset risk threshold, no response is made. After generating the high-speed risk warning, the vehicle dynamic management unit sends the high-speed risk warning to the control warning unit. The control warning unit decelerates the motor by applying a reaction force to the motor. After the motor decelerates, the vehicle dynamic management unit recalculates the new downhill risk value. If the new downhill risk value is less than the preset risk threshold, a deceleration completion signal is generated. If the new downhill risk value is greater than or equal to the preset risk threshold, the high-speed risk warning continues to be generated, and the high-speed risk warning or deceleration completion signal is continuously sent to the control warning unit. The control warning unit generates a braking warning after obtaining the high-speed risk warning.

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