Auxiliary driving system for safe driving of electric bicycle

Abstract

The utility model provides an auxiliary driving system for safe driving of an electric bicycle. The auxiliary driving system comprises an auxiliary license plate frame, a power source, a left vibration motor, a right vibration motor, a loudspeaker, a main controller, a speed sensor, a left LED warning lamp, a right LED warning lamp and a liquid crystal display. The auxiliary license plate frame comprises a license plate frame body, a left LED warning lamp strip, a right LED warning lamp strip, a camera, a left radar and a right radar. The auxiliary driving system is based on the single-chip microcomputer, the radar and the camera, the single-chip microcomputer judges the appropriate doubling time by detecting the distance and speed of surrounding obstacles, the vehicle conditions in the rear blind area are visually displayed to a driver through the sound, light and vibration alarm mode and the display mode of the liquid crystal display, and the auxiliary driving system is convenient to install, low in cost and easy to popularize. The running safety of the electric bicycle is improved, and the traffic accident risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycle safe driving auxiliary equipment, in particular to an auxiliary license plate frame for electric bicycle safe driving and an auxiliary driving system for electric bicycle safe driving based on a single chip microcomputer and a radar. Background Art

[0002] At present, road traffic safety lane-changing assistance technology is mainly used in the field of automobile safe driving. For example, some mid-to-high-end cars are equipped with safe driving assistance systems. The basic technical principle is that the vehicle uses a series of millimeter-wave radar probes distributed on the front and rear surrounds of the vehicle to scan and detect surrounding vehicles in real time. When there is an approaching vehicle from behind or there is an oncoming vehicle from behind the adjacent lane, the assisted driving system will trigger the warning light installed on the rearview mirror or A-pillar to flash, and at the same time trigger the assisted driving system alarm sound to remind the driver that there is a vehicle behind and continuing to change lanes may cause danger. This brings convenience to driving safety and avoids the occurrence of traffic accidents to a large extent.

[0003] In recent years, with the widespread popularity of electric bicycles in daily travel, their safety issues have received increasing attention. During riding, electric bicycle drivers often need to perform lane changes. Due to the fact that they do not look at the rearview mirror when changing lanes or the rearview mirror has a large blind spot, drivers often rely on their own experience and intuition and change lanes at will without observing the condition of the vehicle behind them, increasing the risk of traffic accidents. Although electric bicycles on the market have made progress in safety technology, due to factors such as technology, cost, and installation and expansion difficulties, the specific safety function of collision avoidance assistance has not been widely used. In order to improve the safety of merging and driving, it is particularly important to develop an easy-to-install, practical, efficient and low-cost lane-changing auxiliary safety device. Utility Model Content

[0004] The purpose of the utility model is to provide an auxiliary license plate frame for safe driving of electric bicycles and an auxiliary driving system for safe driving of electric bicycles based on a single-chip microcomputer and radar, aiming to improve the safety of merging and driving of electric bicycles through technical means and optimized control methods under the premise of reducing costs and ensuring reliability, and at the same time, it is easy to install and expand the related hardware of the auxiliary driving system.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An auxiliary license plate frame for safe driving of an electric bicycle, the auxiliary license plate frame comprising a license plate frame body, a left LED warning light strip, a right LED warning light strip, a camera, a left radar and a right radar;

[0007] The license plate frame body is provided with a left LED warning light strip and a right LED warning light strip;

[0008] The left radar and the right radar are respectively arranged on the left side and the right side of the license plate frame body, and the lenses of the left radar and the right radar are both oriented toward the rear direction of the electric bicycle. The left radar and the right radar are used to detect the left rear side, the rear side and the right rear side of the electric bicycle;

[0009] The camera is arranged on the license plate frame body, and the lens of the camera is oriented toward the rear direction of the electric bicycle.

[0010] Preferably, the auxiliary license plate frame further includes a left radar base, a right radar base and a camera base;

[0011] The left radar base and the right radar base are respectively arranged on the left top side and the right top side of the license plate frame body through angle iron supports and fastening bolts, the left radar is installed on the left radar base, and the right radar is installed on the right radar base, so that the left radar base and the right radar base are both rotated in the front-to-back direction along the axis of the fastening bolts to adjust the orientation of the lenses of the left radar and the right radar;

[0012] The camera base is arranged on the top of the license plate frame body through an angle iron support and a fastening bolt, and the camera is installed on the camera base to enable the camera base to rotate in the front-to-back direction along the axis of the fastening bolt to adjust the direction of the camera lens.

[0013] An auxiliary driving system for safe driving of an electric bicycle, the auxiliary driving system comprising any one of the auxiliary license plate frame described above, a power supply, a left vibration motor, a right vibration motor, a speaker, a main controller, a speed sensor, a left LED warning light, a right LED warning light and a liquid crystal display;

[0014] The main controller includes a single chip microcomputer;

[0015] The power supply is electrically connected to the main controller for supplying power to the main controller;

[0016] The camera, the left radar, the right radar, and the speed sensor are electrically connected to corresponding input terminals of the main controller through conductive wires, respectively, so as to provide input signals to the main controller;

[0017] The left LED warning light strip, the right LED warning light strip, the left vibration motor, the right vibration motor, the speaker, the left LED warning light, the right LED warning light and the liquid crystal display are electrically connected to the corresponding output terminals of the main controller through conductive wires, respectively, so as to receive the output signal sent by the main controller;

[0018] The speed sensor is arranged on the body of the electric bicycle;

[0019] The left vibration motor is arranged in the left handlebar of the electric bicycle, and the right vibration motor is arranged in the right handlebar of the electric bicycle;

[0020] The speaker is arranged in the instrument panel of the electric bicycle;

[0021] The left LED warning light is arranged on the left rearview mirror of the electric bicycle, and the right LED warning light is arranged on the right rearview mirror of the electric bicycle;

[0022] The liquid crystal display is arranged in the instrument panel of the electric bicycle, and the liquid crystal display is used to display image alarms.

[0023] Preferably, the installation angle on the horizontal plane of the left radar and the right radar is 135°, the vertical heights of the left radar and the right radar from the ground are both 0.75m-1.2m, the horizontal detection angle of the left radar and a single radar of the right radar is 90°, the superimposed horizontal detection angle of the two radars is 225°, and the vertical detection angles of the left radar and the right radar are both 35°.

[0024] This application has achieved the following beneficial technical effects:

[0025] Through the multiple warning methods of light, sound, image and vibration in the auxiliary driving system of the above-mentioned electric bicycle, the driver can focus more on driving and lane-changing safety while driving on the road, which greatly reduces the hidden dangers of road traffic safety accidents caused by rear blind spots or unconscious lane changes;

[0026] In actual implementation, due to the complex road and vehicle conditions, the assisted driving system may judge stationary objects, such as fences, walls, stationary vehicles, etc. as vehicles coming from behind. In response to this situation, the assisted driving system adds a judgment mechanism to determine whether the obstacle is stationary or not. By using the coordinated speed measurement of the speed sensor and radar, the microcontroller uses an algorithm to determine whether the obstacle behind is a stationary object or a moving vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A schematic diagram of the structure of an auxiliary license plate frame for safe driving of an electric bicycle provided by an embodiment of the utility model;

[0028] Figure 2 A right side structural schematic diagram of an auxiliary license plate frame for safe driving of an electric bicycle provided by an embodiment of the utility model;

[0029] Figure 3 A schematic diagram of the hardware layout of an auxiliary license plate frame for safe driving of an electric bicycle and an auxiliary driving system provided by an embodiment of the utility model;

[0030] Figure 4 A schematic diagram of the circuit connection structure of the sound alarm, light alarm, vibration alarm and display alarm of an auxiliary driving system for safe driving of an electric bicycle provided by an embodiment of the utility model;

[0031] Figure 5 A schematic diagram of the structure of the connection of components of an auxiliary driving system for safe driving of an electric bicycle provided by an embodiment of the utility model;

[0032] Figure 6 A schematic diagram of the working process of an auxiliary driving system for safe driving of an electric bicycle provided by an embodiment of the utility model;

[0033] Markings in the figure: 1- auxiliary license plate frame, 2- right LED warning light strip, 3- right radar, 4- right radar base, 5- rear view low light HD camera, 6- camera base, 7- left radar base, 8- left radar, 9- left LED warning light strip, 10- mounting hole, 11- angle iron support of right radar base, 12- main body of license plate frame;

[0034] 15-bus cable, 16-power supply (regulated power supply), 17-left vibration motor, 18-right vibration motor, 19-speaker, 20-ultrasonic and image sensor integration module, 21-main controller, 22-speed sensor, 23-left LED warning light on the left rearview mirror, 24-left rearview mirror, 25-right LED warning light on the right rearview mirror, 26-right rearview mirror, 27-instrument panel, 28-TFT liquid crystal display;

[0035] 30- installation horizontal angle between the left radar and the right radar, 31- third radar coverage area, 32- second radar coverage area, 33- first radar coverage area, 34- left radar coverage area, 35- overlapping coverage area of ​​left and right radars, 36- right radar coverage area. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be understood that the terms "center", "axial", "radial", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "top", "bottom", "high", "low", "clockwise", "counterclockwise", "inside", "outside", "horizontal", "vertical" and the like indicate orientations or positional relationships based on orientations or positional relationships in actual use, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] Reference Figure 1-6 , auxiliary license plate frame 1, right LED warning light strip 2, right radar 3, right radar base 4, rear-view low-light high-definition camera 5, camera base 6, left radar base 7, left radar 8, left LED warning light strip 9, mounting hole 10, angle iron support 11 of right radar base 4, license plate frame body 12; bus cable 15, power supply 16, left vibration motor 17, right vibration motor 18, speaker 19, ultrasonic and image sensor integration module 20, main controller 21, speed sensor 22, left LED warning light 23 on left rearview mirror 24, left rearview mirror 24, right LED warning light 25 on right rearview mirror 26, right rearview mirror 26, instrument panel 27, TFT liquid crystal display 28; installation horizontal angle 30 between left radar 8 and right radar 3, third radar coverage area 31, second radar coverage area 32, first radar coverage area 33, left radar coverage area 34, left and right radar overlapping coverage area 35, right radar coverage area 36.

[0039] The present application provides an auxiliary license plate frame for safe driving of an electric bicycle, the auxiliary license plate frame 1 comprising a license plate frame body 12, a left LED warning light strip 9, a right LED warning light strip 2, a camera 5, a left radar 8 and a right radar 3;

[0040] The license plate frame body 12 is provided with a left LED warning light strip 9 and a right LED warning light strip 2;

[0041] The left radar 8 and the right radar 3 are respectively arranged on the left and right sides of the license plate frame body 12, and the lenses of the left radar 8 and the right radar 3 are both oriented toward the rear direction of the electric bicycle. The left radar 8 and the right radar 3 are used to detect the left rear side, the rear side and the right rear side of the electric bicycle;

[0042] The camera 5 is disposed on the license plate frame body 12 , and the lens of the camera 5 is oriented toward the rear direction of the electric bicycle.

[0043] In one embodiment of the present application, the auxiliary license plate frame 1 further includes a left radar base 7, a right radar base 4 and a camera base 6;

[0044] The left radar base 7 and the right radar base 4 are respectively arranged on the left top side and the right top side of the license plate frame body 12 through angle iron supports 11 and fastening bolts, the left radar 8 is installed on the left radar base 7, and the right radar 3 is installed on the right radar base 4, so that the left radar base 7 and the right radar base 4 are both rotated in the front-to-back direction along the axis of the fastening bolts to adjust the orientation of the lenses of the left radar 8 and the right radar 3;

[0045] The camera base 6 is arranged on the top of the license plate frame body 12 through an angle iron support 11 and a fastening bolt, and the camera 5 is installed on the camera base 6 to enable the camera base 6 to rotate in the front-to-back direction along the axis of the fastening bolt to adjust the direction of the lens of the camera 5.

[0046] The present application provides an auxiliary driving system for safe driving of an electric bicycle, the auxiliary driving system comprising the auxiliary license plate frame 1 described in any one of the above, a power supply 16, a left vibration motor 17, a right vibration motor 18, a speaker 19, a main controller 21, a speed sensor 22, a left LED warning light 23, a right LED warning light 25 and a liquid crystal display 28;

[0047] The main controller 21 includes a single chip microcomputer;

[0048] The power supply 16 is electrically connected to the main controller 21 to supply power to the main controller 21;

[0049] The camera 5, the left radar 8, the right radar 3, and the speed sensor 22 are respectively electrically connected to corresponding input terminals of the main controller 21 through conductive wires to provide input signals to the main controller 21;

[0050] The left LED warning light strip 9, the right LED warning light strip 2, the left vibration motor 17, the right vibration motor 18, the speaker 19, the left LED warning light 23, the right LED warning light 25 and the liquid crystal display 28 are electrically connected to the corresponding output terminals of the main controller 21 through conductive wires, respectively, so as to receive the output signal sent by the main controller 21;

[0051] The speed sensor 22 is arranged on the body of the electric bicycle;

[0052] The left vibration motor 17 is arranged in the left handlebar of the electric bicycle, and the right vibration motor 18 is arranged in the right handlebar of the electric bicycle;

[0053] The speaker 19 is arranged in the instrument panel 27 of the electric bicycle;

[0054] The left LED warning light 23 is arranged on the left rearview mirror 24 of the electric bicycle, and the right LED warning light 25 is arranged on the right rearview mirror 26 of the electric bicycle;

[0055] The liquid crystal display 28 is disposed in the instrument panel 27 of the electric bicycle, and the liquid crystal display 28 is used to display image alarms.

[0056] In one embodiment of the present application, the installation angle between the left radar 8 and the right radar 3 on the horizontal plane is 135°, the vertical heights of the left radar 8 and the right radar 3 from the ground are both 0.75m-1.2m, the horizontal detection angle of the left radar 8 and a single radar of the right radar 3 is 90°, the superimposed horizontal detection angle of the left radar 8 and the two radars of the right radar 3 is 225°, and the vertical detection angles of the left radar 8 and the right radar 3 are both 35°.

[0057] The present application aims to provide a safe, reliable and easy-to-install auxiliary license plate frame 1 and auxiliary driving system for safe driving of electric bicycles, so as to improve the safety of electric bicycle driving; the core features are: the sensor hardware such as the camera 5, the left radar 8, the right radar 3 are easy to install, and are directly embedded and installed on the license plate frame body 12, eliminating the complicated processes such as drilling, and are beautiful and generous. At the same time, the detection angle can be flexibly adjusted to be suitable for different models; in terms of software, it is to use sensor technology and optimized control algorithms to monitor the status of the rear vehicle when the electric bicycle is driving in real time, and provide effective assistance during driving, merging and turning; the device has the characteristics of easy installation and expansion, fast response speed, simple operation, safety and reliability, controllable cost, low power consumption, etc., which can significantly reduce the safety risks during the driving of electric bicycles.

[0058] The present application provides an auxiliary license plate frame 1 for safe driving of an electric bicycle. The left radar base 7, the right radar base 4 and the camera base 6 are respectively connected and fixed by angle iron supports 11 and fastening bolts on both sides below them. The left radar base 7, the right radar base 4 and the camera base 6 can each rotate forward and backward at a certain angle along the axis of the fastening bolts fixed above the angle iron support 11. During installation, the two fixing bolts below the angle iron support 11 are tightened in advance. After the detection angles of the radar and the camera 5 are adjusted, the upper fastening bolts are tightened to fix them. The purpose is to install the bracket for the electric bicycle license plate at different angles. This variable angle design can ensure that the detection radar detection surface is at the best detection angle to obtain the farthest and most accurate detection information.

[0059] In the present application, two mounting holes 10 are reserved on the license plate frame body 12 of the auxiliary license plate frame 1, which match the positioning bolts originally reserved for license plate installation on the electric bicycle, and do not affect the normal installation of the license plate. After installation together with the license plate, all four sides of the license plate are sunk and embedded in the auxiliary license plate frame 1 of this embodiment, which protects the license plate without blocking the license plate.

[0060] In this application, the main controller 21 is a single-chip microcomputer minimum embedded assisted driving system based on a single-chip microcomputer. The main controller 21 has the most basic reset circuit and crystal oscillator circuit, rich input and output I / O ports, and provides efficient operation speed and sufficient interfaces for peripherals. The single-chip microcomputer minimum assisted driving system and peripheral interface circuits are integrated on the PCB circuit board, leaving a sensor and alarm module drive circuit interface, and the ISP download interface circuit realizes program download and update. The above main controller 21 is wrapped with a waterproof plastic shell and fixedly installed in the protective shell under the rear seat of the electric bicycle.

[0061] In the present application, the left radar 8 and the right radar 3, as a preferred solution, are ultrasonic radars (ultrasonic detectors) with a sensing distance of 0.1 meters to 20 meters, a power supply voltage of 3V to 5.5V, a working current of 40mA, a standby current of 20μA to 40μA, a detection angle of ±90° in azimuth and ±35° in pitch. They are respectively installed on the left radar base 7 and the right radar base 4 on the auxiliary license plate frame 1, which can be swung back and forth and adjusted in angle; the installation angle between the left radar 8 and the right radar 3 is 135°, and the vertical height from the ground is 0.75m to 1.2m. The detection horizontal plane angle of a single radar is 90°, the superimposed horizontal plane detection angle of the two radars is 225°, and the vertical detection angle is 35°. The detection ranges are respectively the fan-shaped area 34 and the fan-shaped area 36 and the overlapping area 35 of the two.

[0062] In this application, the power supply 16 adopts a DC step-down module with an isolated package, which is small in size, has protection against overcurrent, overvoltage, short circuit and overtemperature, and has excellent anti-interference and three-proof performance. It is used to supply stable DC voltage and current to each module. The installation position is: take power from the battery of the electric bicycle in series with a 2A fuse, and install it fixedly side by side near the main controller 21 under the rear seat of the electric bicycle.

[0063] In the present application, the speed sensor 22 adopts a Hall sensor speed measurement module. The circuit board is plastic-sealed and installed on the inner side of the rear wheel of the vehicle. A permanent magnet is fixed on the wheel hub. After the Hall element senses the magnetic field, the LM393 comparator outputs the voltage analog quantity, which is converted into a periodic digital signal that can be detected by the microcontroller through the AD conversion module. The real-time speed variable value of the electric bicycle is obtained after calculation.

[0064] In the present application, the alarm includes light alarm, sound alarm and vibration alarm, which are composed of corresponding LED warning lights, speakers 19 and vibration motors, which are connected via a bus cable and controlled by the single-chip microcomputer in the main controller 21. After the alarm, the real picture behind can be monitored in real time through the camera 5 and the LCD display 28.

[0065] In the present application, a speaker 19 is installed and fixed in the instrument panel 27 on the front side of the electric bicycle to give a sound alarm for the warning information of the rear vehicle merging into the lane, which can also be achieved by a buzzer;

[0066] The left LED warning light 23 for left blind spot detection is installed on the outer side of the left rearview mirror 24, and the left vibration motor 17 for left blind spot detection is installed in the left handle. Correspondingly, the right LED warning light 25 for right blind spot detection is installed on the outer side of the right rearview mirror 26, and the right vibration motor 18 for right blind spot detection is installed in the right handle; preferably, the LED indicator light has a striking color and the light emission direction points to the driver's driving position.

[0067] In the present application, the left LED warning light 23 on the left rearview mirror 24 and the right LED warning light 25 on the right rearview mirror 26 have three flashing frequencies: low frequency, medium frequency, and high frequency, which respectively represent the long, medium, and short distance light alarms of the rear vehicle in the first radar coverage area, the second radar coverage area, and the third radar coverage area.

[0068] In this application, the speaker 19 in the assisted driving system is installed in the instrument panel 27. Under the control of the single-chip microcomputer, it emits three frequencies of prompt sound: low frequency, medium frequency, and high frequency, which respectively represent the long, medium, and short distance sound alarms of the rear vehicle in the first radar coverage area, the second radar coverage area, and the third radar coverage area.

[0069] In the present application, the installation position of the left vibration motor 17 and the right vibration motor 18 are in the left and right handles. Under the control of the single-chip microcomputer, they emit three vibration frequencies of low frequency, medium frequency and high frequency. The vibration intensity can be transmitted to the driver's left or right hand. The three vibration frequencies represent the long-range, medium-range and short-range vibration alarms of the rear vehicle in the first radar coverage area, the second radar coverage area and the third radar coverage area respectively.

[0070] In the present application, in the assisted driving system, the speed sensor 22 is installed on the inner side of the rear wheel to measure the real-time speed of the electric bicycle. The assisted driving system only works above a specific speed of the vehicle, avoiding frequent operation at low speeds and reducing energy consumption. At the same time, the probability of rear-end collisions or lane change accidents at low speeds is extremely low.

[0071] In this application, in the assisted driving system, the connection modes between various modules are signal communication connection and power supply 16 alone. After the electric bicycle is started, the assisted driving system first detects the startup status of the assisted driving system:

[0072] When turned off, the assisted driving system does not work.

[0073] In semi-automatic and fully automatic modes, when the vehicle speed is above a certain speed, the assisted driving system starts to detect radar scanning and respond in real time;

[0074] In semi-automatic mode, only when the left or right turn signal is turned on, the radar senses the rear obstacles or vehicles coming from behind, and determines and responds to the distance of the vehicles.

[0075] When the rear obstacle is in the first radar coverage area, the LED indicator on the corresponding side flashes at a low frequency, the speaker 19 in the instrument panel sounds at a low frequency, and the vibration motor of the handle on the corresponding side vibrates at a low frequency;

[0076] When the rear obstacle is in the second radar coverage area, the LED indicator light on the corresponding side will flash at a medium frequency to give an alarm, the speaker 19 in the dashboard will sound at a medium frequency, and the vibration motor of the handle on the corresponding side will vibrate at a medium frequency;

[0077] When the rear obstacle is in the coverage area of ​​the third radar, the LED warning light on the corresponding side flashes at a high frequency to give an alarm, the speaker 19 in the instrument panel sounds at a high frequency, and the vibration motor of the handle on the corresponding side vibrates at a high frequency.

[0078] In the present application, in the assisted driving system, as long as there is an alarm, the camera 5 automatically collects rear image information and displays it on the LCD display 28 on the instrument panel 27. At the same time, the LED warning lights on both sides of the rear license plate base flash to remind the driver of the rear vehicle to pay attention to safety.

[0079] The working principle of the auxiliary driving system for safe driving of an electric bicycle provided in this application is as follows:

[0080] When the electric bicycle is running normally, the radar can be used to perform real-time scanning and detection of vehicles behind to determine whether there are oncoming vehicles from the rear and the distance and approximate position of the oncoming vehicles. When an oncoming vehicle approaches within the coverage range of the rear radar (such as 20 meters), the radar will transmit the detected signal to the single-chip microcomputer. After the single-chip microcomputer performs calculations and judgments, it will transmit the alarm signal to the drive circuit, and the drive load will transmit the LED light information, the speaker 19 sound information and the vibration body sensory information of the handlebar to the driver of the electric bicycle. At the same time, the rear camera 5 will transmit the rear field of view image to the LCD display 28 of the instrument panel 27. The feedback effect is eye-catching and direct, reminding the driver to pay attention to lane change safety when riding.

[0081] In the present application, the three warning alarm modes of sound, light and movement and the rear view image transmission display are used to coordinately remind the driver according to the lane change vehicle condition information. The left vibration motor 17 and the left LED warning light 23 warn the vehicle coming from the left rear; the right vibration motor 18 and the right LED warning light 25 warn the vehicle coming from the right rear, so that the driver can be more aware of the direction of the vehicle coming from the rear blind spot to reduce the harm caused by the lane change.

[0082] In this application, the auxiliary driving system of the electric bicycle can detect the general range of the vehicle coming from behind:

[0083] By measuring the distance of the vehicle behind by the radar on the auxiliary license plate frame 1, the distance of the vehicle coming from behind can be calculated. The auxiliary driving system divides the area covered by the radar into three areas in the front-to-back direction, namely the first radar coverage area 33, the second radar coverage area 32 and the third radar coverage area 31;

[0084] When the vehicle behind enters the first radar coverage area (e.g. 14m-20m), the auxiliary driving system prompts a slight lane change alarm, that is, the sound warning frequency is low, the LED warning light flashes slowly, and the handle vibration motor vibrates slightly;

[0085] When the vehicle behind enters the second radar coverage area (e.g. 7-14 meters), the auxiliary driving system prompts that the lane change alarm level is medium, that is, the sound warning frequency is faster, the LED warning light flashes faster, and the vibration frequency of the handle vibration motor is more obvious;

[0086] When the vehicle behind enters the coverage area of ​​the third radar (e.g. within 7 meters), the auxiliary driving system will prompt the most severe lane change alarm, that is, the sound warning frequency is the highest, the LED warning light flashes the fastest, and the handle vibration motor vibrates the strongest;

[0087] In addition, the two radars of the assisted driving system can detect vehicles approaching from the left and right positions behind. The assisted driving system also divides the radar coverage area into three areas according to the left and right directions, namely the left radar coverage area 34, the two radar overlapping coverage area 35, and the right radar coverage area 36. The assisted driving system uses different sound and light control alarm modes to indicate the approximate position of the vehicle approaching from behind:

[0088] When an oncoming vehicle enters the left radar coverage area 34, the left side sound, light, and vibration alarm prompts indicate that there is an oncoming vehicle on the left side behind;

[0089] When an oncoming vehicle enters the right radar coverage area 36, ​​the right side sound, light, and vibration alarm prompts indicate that there is an oncoming vehicle on the right side behind;

[0090] When an oncoming vehicle enters the overlapping coverage area 35 of the two middle radars, the left and right sides will sound, light and vibration alarms at the same time, indicating that the oncoming vehicle is in the rear position.

[0091] In this application, in order to minimize the energy consumption of the assisted driving system, the minimum activation speed of the assisted driving system of the electric bicycle is introduced. When the speed sensor 22 detects that the driving speed is above the preset speed (such as 15 km / h), the assisted driving system starts working, otherwise the assisted driving system is in low-power standby mode.

[0092] In the present application, the assisted driving system can determine whether the vehicle coming from behind is stationary or moving during operation. The single-chip computer calculates the speed of the obstacle detected by the radar and compares it with the vehicle speed measured by the speed sensor 22. When the two are consistent, it means that the obstacle being measured is a stationary guardrail or other roadblock. The assisted driving system returns to the standby state and does not issue an alarm. Otherwise, if the differential speed is inconsistent, it means that the obstacle being measured is a dynamic vehicle, and the assisted driving system enters the alarm subroutine.

[0093] In the present application, the assisted driving system sets three activation modes of the assisted driving system through the single-chip control program in the main controller 21, namely: full-automatic mode, semi-automatic mode, and off mode, and the corresponding mode switching instructions are executed by the three-stage switch button installed on the handle;

[0094] When the driver operates the three-stage switch on the handlebar to the "full automatic" position, the single-chip microcomputer detects the key switch signal and switches the auxiliary driving system program to the full automatic state. When the auxiliary driving system is above the preset speed, the radar sensing probe is automatically turned on to conduct real-time early warning detection of obstacles such as vehicles around the electric bicycle. If there is a vehicle coming from behind, a series of sensing alarm responses will be made. If there is no vehicle coming from behind, the radar will continue to detect the vehicle behind.

[0095] When the driver operates the three-stage switch on the handlebar to the "semi-automatic" position, the assisted driving system is above the preset speed, and when the driver manually turns on the turn signal, the assisted driving system starts the radar sensing probe for detection, and performs real-time early warning detection of traffic and other obstacle information around the electric bicycle. If there is a vehicle coming from behind, a series of sensing alarm responses will be performed. If there is no vehicle coming from behind, the radar will continue to detect the vehicle behind. When the lane change is completed and the electric bicycle turn signal is turned off, the assisted driving system enters standby mode and waits for the next turn signal to arrive. If the main controller 21 detects that the assisted driving system is in the off state, the assisted driving system directly enters the standby mode. At this time, no signal can trigger the assisted driving system to work until the mode is switched.

[0096] In the present application, the assisted driving system starts the radar scanning detection subroutine, and determines whether the speed of the rear obstacle is equal to the real-time vehicle speed through the radar ranging algorithm. If they are equal, it is determined that the rear detected object is a stationary object (such as a fence, a stationary car, etc.), and the assisted driving system continues to detect the speed of the obstacle; when the turn signal is turned off, the radar detection and alarm program is exited and returned to the low-power standby state; if the variable values ​​measured by the radar and the speed sensor 22 are not equal during the process of turning on the turn signal and changing lanes, it means that there is a vehicle coming from behind, and the next alarm subroutine is entered.

[0097] In this application, the auxiliary driving system continues to determine the distance of the rear vehicle through radar ranging. When the distance of the rear vehicle is within the first radar coverage area (14 meters to 20 meters), if the left radar 8 has a signal but the right radar has no signal, the low-level alarm subroutine is started to drive the left rearview mirror LED warning light to flash at a low frequency, drive the speaker 19 in the instrument panel 27 to give a low-frequency prompt, and drive the left handle vibration motor to vibrate at a low frequency to remind the driver that there is a vehicle on the left rear.

[0098] If the right radar 3 has a signal but the left radar 8 has no signal, the low-frequency sound, light and vibration alarm driving circuit of the right alarm is activated to drive the load to act and remind the driver that there is a vehicle coming from the right rear;

[0099] If the radars on both sides send signals at the same time, it means there is a vehicle coming from the rear. The program drives the load drive circuits on both sides to make the loads perform alarm actions, indicating that the danger level of the lane change is the lowest level.

[0100] When the distance of the rear vehicle is within the coverage area of ​​the second radar (7 meters to 14 meters), according to the above judgment method, the medium-frequency alarm prompt actions of the three alarm circuits are performed in turn for the rear left, rear right and rear vehicles, indicating that the danger level of the lane change is medium level;

[0101] When the distance of the rear vehicle is within the coverage area of ​​the third radar (less than 7 meters), according to the above judgment method, the high-frequency alarm prompt actions of the three alarm circuits are performed in turn for the rear left, rear right and rear vehicles, indicating that the danger level of merging is the highest level;

[0102] After the alarm is sounded until the turn or lane change is completed, the assisted driving system returns to low power consumption mode and the program ends;

[0103] If the scanning button of the auxiliary driving system detects that neither the "off" gear position signal nor the "semi-automatic" gear position signal is connected, the auxiliary driving system enters the "full automatic" state;

[0104] Similarly, the assisted driving system will again determine whether the rear object is a stationary object. If so, it will enter the low-power standby mode and the program will end. If not, it will proceed to the next step.

[0105] The assisted driving system continues to determine whether the moving object behind enters the coverage area of ​​the three radars.

[0106] In the present application, it should be emphasized that the operating mode of the assisted driving system can be switched at any time during the power-on process: when the assisted driving system is in automatic mode and an alarm is sounded for a sudden vehicle coming from behind, the camera 5 will immediately transmit the rear-view camera information to the LCD display 28 on the front instrument panel 27; similarly, when the assisted driving system is in the off mode and the turn signal is turned on, the rear camera 5 will be automatically turned on to warn of the driving information on the rear road; similarly, when the assisted driving system triggers an alarm in the fully automatic or semi-automatic mode, the LED warning light strips on both sides of the license plate frame body 12 will flash to remind the rear driver to pay attention to safety.

[0107] The methods and devices not described in detail in the present invention are all prior art and will not be described in detail.

[0108] The principles and implementation methods of the present invention are described in this article using specific embodiments. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An auxiliary driving system for safe driving of an electric bicycle, characterized in that: The auxiliary driving system includes an auxiliary license plate frame, a power supply, a left vibration motor, a right vibration motor, a speaker, a main controller, a speed sensor, a left LED warning light, a right LED warning light and a liquid crystal display; The main controller includes a single chip microcomputer; The power supply is electrically connected to the main controller for supplying power to the main controller; The camera, the left radar, the right radar, and the speed sensor are respectively electrically connected to corresponding input terminals of the main controller through conductive wires to provide input signals to the main controller; The left LED warning light strip, the right LED warning light strip, the left vibration motor, the right vibration motor, the speaker, the left LED warning light, the right LED warning light and the liquid crystal display are electrically connected to the corresponding output terminals of the main controller through conductive wires, respectively, so as to receive the output signal sent by the main controller; The speed sensor is arranged on the body of the electric bicycle; The left vibration motor is arranged in the left handlebar of the electric bicycle, and the right vibration motor is arranged in the right handlebar of the electric bicycle; The speaker is arranged in the instrument panel of the electric bicycle; The left LED warning light is arranged on the left rearview mirror of the electric bicycle, and the right LED warning light is arranged on the right rearview mirror of the electric bicycle; The liquid crystal display is arranged in the instrument panel of the electric bicycle, and the liquid crystal display is used to display image alarms; The auxiliary license plate frame includes a license plate frame body, a left LED warning light strip, a right LED warning light strip, a camera, a left radar and a right radar; The license plate frame body is provided with a left LED warning light strip and a right LED warning light strip; The left radar and the right radar are respectively arranged on the left side and the right side of the license plate frame body, and the lenses of the left radar and the right radar are both oriented toward the rear direction of the electric bicycle. The left radar and the right radar are used to detect the left rear side, the rear side and the right rear side of the electric bicycle; The camera is arranged on the license plate frame body, and the lens of the camera is oriented toward the rear direction of the electric bicycle.

2. The auxiliary driving system for safe driving of an electric bicycle according to claim 1, characterized in that: The auxiliary license plate frame also includes a left radar base, a right radar base and a camera base; The left radar base and the right radar base are respectively arranged on the left top side and the right top side of the license plate frame body through angle iron supports and fastening bolts, the left radar is installed on the left radar base, and the right radar is installed on the right radar base, so that the left radar base and the right radar base are both rotated in the front-to-back direction along the axis of the fastening bolts to adjust the orientation of the lenses of the left radar and the right radar; The camera base is arranged on the top of the license plate frame body through an angle iron support and a fastening bolt, and the camera is installed on the camera base to enable the camera base to rotate in the front-to-back direction along the axis of the fastening bolt to adjust the direction of the camera lens.

3. The auxiliary driving system for safe driving of an electric bicycle according to claim 1, characterized in that: The installation angle between the left radar and the right radar on the horizontal plane is 135°, the vertical heights of the left radar and the right radar from the ground are both 0.75m-1.2m, the horizontal detection angle of the left radar and a single radar of the right radar is 90°, the superimposed horizontal detection angle of the two radars is 225°, and the vertical detection angles of the left radar and the right radar are both 35°.

Images