Active early warning type radar tail lamp for electric vehicle

Abstract

An active early warning type radar tail lamp for an electric vehicle comprises a tail lamp shell and a PCB arranged in the tail lamp shell, a radar chip is arranged on the PCB, the radar chip achieves real-time detection of the relative horizontal distance M and the relative linear distance N between the radar chip and a rear object in the mode that millimeter waves are emitted backwards, and an MCU chip and a Bluetooth IC are further arranged on the PCB. The Bluetooth IC is used for realizing Bluetooth connection with a vehicle owner, the MCU chip is electrically connected with an external sound-light alarm element, and the MCU chip receives measurement data of the radar chip at two continuous moments t1 and t2 and performs operation according to a built-in program; data can be accurately collected through the radar chip, the MCU chip carries out calculation according to the collected data, it can be guaranteed that a driver has enough safety distance and response time, and when the situation that the safety distance is small or the response time is insufficient is calculated, the MCU chip enables the sound-light alarm element to give a sound-light alarm, and the active early warning function is achieved.

Description

Technical Field

[0001] The invention relates to an active early warning radar taillight for an electric vehicle. Background Art

[0002] Motorcycles and electric vehicles are still one of the important means of transportation for daily travel due to their flexibility. When driving at night or in bad weather such as rain and snow, the safety of motorcycles and electric vehicles is difficult to guarantee, especially when turning, it is inconvenient for the driver to look back and observe the situation of vehicles coming from behind, which poses certain safety hazards.

[0003] With the improvement of safety awareness, relevant vehicle manufacturers have realized that equipping motorcycles and electric vehicles with radar-type anti-collision warning devices can effectively reduce the probability of traffic accidents. After searching, it was found that there are also several patent applications involving radar-type anti-collision warnings. The integrated anti-collision auxiliary warning reflection device for motorcycles and electric vehicles with publication number CN220114743U can be used as a reference example.

[0004] The applicant believes that the driving safety of motorcycles and electric vehicles is very important, but the radar-type anti-collision warning device involved in the existing technology has a single mode, cannot provide accurate warning, and is difficult to meet the actual complex driving conditions, and needs further improvement and perfection. Summary of the invention

[0005] In view of the shortcomings existing in the above problems, the present invention provides an active early warning radar taillight for an electric vehicle.

[0006] To achieve the above-mentioned object, the present invention provides an active early warning radar taillight for an electric vehicle, comprising a taillight housing fixedly mounted on a rear bracket of a motorcycle or an electric vehicle, and a PCB board arranged in the taillight housing, wherein a radar chip is arranged on the PCB board, and the radar chip transmits millimeter waves to the rear to achieve real-time detection of a relative horizontal distance M and a relative straight-line distance N to a rear object, and an MCU chip is also arranged on the PCB board, and the MCU chip is electrically connected to an external sound and light alarm element, and the MCU chip receives measurement data of the radar chip at two consecutive instants t1 and t2 and performs calculations according to a built-in program; When the relative horizontal distance M is greater than 0.75 meters and the calculated value of N2 / [(N2-N1) / (t2-t1)] is less than the set value T1 inside the MCU chip, the MCU chip controls the sound and light alarm element to make an overtaking warning response; When the relative horizontal distance M is less than 0.75 meters and the calculated value of N2 / [(N2-N1) / (t2-t1)] is less than the set value T2 inside the MCU chip, the MCU chip controls the sound and light alarm element to make a following vehicle warning response; The MCU chip is electrically connected to the turn signal light on the vehicle through a signal feedback circuit to identify whether the turn signal light on the vehicle is on. When it is identified that the turn signal light on the vehicle is on, the MCU chip changes the set value T1 to 1.5 times the original set value.

[0007] Furthermore, a Bluetooth IC is also provided on the PCB board, and the Bluetooth IC is used to achieve Bluetooth connection with the car owner.

[0008] Furthermore, the relative horizontal distance M that the radar chip can detect is 4 meters.

[0009] Furthermore, the sound and light alarm elements include a vehicle-mounted central control screen, a buzzer, and a rearview mirror warning LED light.

[0010] Furthermore, when the overtaking warning response occurs, the vehicle-mounted central control screen and rearview mirror warning LED lights controlled by the MCU chip appear to be constantly on; when the following vehicle warning response occurs, the vehicle-mounted central control screen and rearview mirror warning LED lights controlled by the MCU chip appear to be flashing, and at the same time, the buzzer emits a warning frequency of 80 times per minute.

[0011] The beneficial effects of the present invention compared to the prior art are: The radar chip can accurately collect data, and the MCU chip can calculate based on the collected data to ensure that the driver has sufficient safety distance and reaction time. When the calculated safety distance is too small or the reaction time is insufficient, the MCU chip will cause the sound and light alarm element to emit a sound and light alarm, playing an active early warning function. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A three-dimensional diagram of an active early warning radar taillight for an electric vehicle; Figure 2 for Figure 1 An enlarged view of the PCB board in the figure; Figure 3 for Figure 2 Schematic diagram of the other direction.

[0013] In the picture: 1. Taillight housing; 2. PCB board; 3. Radar chip; 4. MCU chip; 5. Bluetooth IC. DETAILED DESCRIPTION

[0014] like Figures 1 to 3As shown, an active early warning radar taillight for an electric vehicle according to an embodiment of the present invention comprises a taillight housing 1 fixedly mounted on a rear bracket of a motorcycle or electric vehicle, a PCB board 2 arranged in the taillight housing 1, a radar chip 3 being arranged on the PCB board 2, the radar chip 3 realizing real-time detection of a relative horizontal distance M and a relative straight-line distance N to a rear object by emitting millimeter waves to the rear, an MCU chip 4 and a Bluetooth IC5 being arranged on the PCB board 2, the Bluetooth IC5 being used to realize Bluetooth connection with the vehicle owner, the MCU chip 4 being electrically connected to an external sound and light alarm element, the MCU chip 4 receiving measurement data of the radar chip 3 at two consecutive instants t1 and t2 and performing calculations according to a built-in program; When the relative horizontal distance M is greater than 0.75 meters and the calculated value of N2 / [(N2-N1) / (t2-t1)] is less than the set value T1 inside the MCU chip 4, the MCU chip 4 controls the sound and light alarm element to make an overtaking warning response; When the relative horizontal distance M is less than 0.75 meters and the calculated value of N2 / [(N2-N1) / (t2-t1)] is less than the set value T2 inside the MCU chip 4, the MCU chip 4 controls the sound and light alarm element to make a following vehicle warning response; More specifically, the relative horizontal distance M that the radar chip 3 can detect is 4 meters, that is, 8 meters on both sides of the taillight. This setting avoids false alarms when there is a following vehicle in the outer lane.

[0015] The sound and light alarm components include the vehicle’s central control screen, buzzer, and rearview mirror warning LED lights; The MCU chip 4 is electrically connected to the turn signal lamp on the vehicle through a signal feedback circuit to identify whether the turn signal lamp on the vehicle is in the on state, that is, when the turn signal switch on the electric vehicle or motorcycle is turned, the turn signal switch sends an electrical signal for the MCU chip to identify; when it is identified that the turn signal lamp on the vehicle is in the on state, the MCU chip 4 changes the set value T1 to 1.5 times the original set value; When the overtaking warning response occurs, the vehicle-mounted central control screen and rearview mirror warning LED lights controlled by the MCU chip 4 appear to be constantly on; when the following vehicle warning response occurs, the vehicle-mounted central control screen and rearview mirror warning LED lights controlled by the MCU chip 4 appear to be flashing, and at the same time, the buzzer emits a warning frequency of 80 times per minute.

[0016] The radar chip can accurately collect data, and the MCU chip can calculate based on the collected data to ensure that the driver has sufficient safety distance and reaction time. When the calculated safety distance is too small or the reaction time is insufficient, the MCU chip will cause the sound and light alarm element to emit a sound and light alarm, playing an active early warning function.

[0017] In order to facilitate the understanding of the present invention, the following description is given in conjunction with the accompanying drawings during specific use; When the relative horizontal distance M is greater than 0.75 meters, it is considered that the vehicle behind is not in the same lane as the vehicle in front, and there is a possibility of overtaking by the vehicle behind. N2 / [(N2-N1) / (t2-t1)] is the time it takes for the rear vehicle to catch up with the vehicle in front. The T1 value stored in the MCU chip has three default gears, namely, the first gear T1=3.3 seconds, the second gear T1=4 seconds, and the third gear T1=5 seconds. The rider connects to the Bluetooth IC through the mobile phone app and selects the T1 value gear.

[0018] To further understand the above T1 value, the following assumptions are made: Without turning on the turn signal, assuming that the difference between (N2-N1) / (t2-t1) is 3m / s, that is, assuming that the speed difference between the two vehicles is 3m / s at a certain moment, if the rider selects the first gear T1=3.3 seconds, the overtaking warning response will be triggered when the measured straight-line distance N2 is less than 9.9m; if the rider selects the second gear T1=4 seconds, the overtaking warning response will be triggered when the measured straight-line distance N2 is less than 12m; if the rider selects the third gear T1=5 seconds, the overtaking warning response will be triggered when the measured straight-line distance N2 is less than 15m; When the turn signal is turned on, in order to further ensure safety, the MCU chip changes the T1 value to 1.5 times the original setting value, that is, T1=5 seconds in the first gear, T1=6 seconds in the second gear, and T1=7.5 seconds in the third gear; similarly, assuming that the difference between (N2-N1) / (t2-t1) is 3m / s, that is, assuming that the speed difference between the two vehicles is 3m / s at a certain moment, if the rider selects the first gear T1=5 seconds, then the measured straight-line distance N2 will be less than 15m, which will trigger the overtaking warning response; if the rider selects the second gear T1=6 seconds, then the measured straight-line distance N2 will be less than 18m, which will trigger the overtaking warning response; if the rider selects the third gear T1=7.5 seconds, then the measured straight-line distance N2 will be less than 22.5m, which will trigger the overtaking warning response.

[0019] Of course, in addition to the default gear, the rider can modify the T1 value default gear parameter to a custom value when connected to Bluetooth. When the turn signal is turned on, the T1 value is also adjusted to 1.5 times the original setting value. This can ensure the safety of steering and reduce frequent warnings or long-term non-warnings according to the traffic conditions of the user's riding section. In addition, when the rider is connected to Bluetooth, the MCU chip will upload the rider's set value to the server for data analysis and summary, so as to correct the set value. The set value can be updated during system OTA.

[0020] In addition, the radar chip itself has a detection angle that can distinguish the direction of the vehicle coming from behind, and can identify whether it is on the left or right side based on the direction; when issuing an early warning, the warning LED light of the rearview mirror in the corresponding direction will light up, making it easier for users to distinguish which direction the rear vehicle is coming from.

[0021] When the relative horizontal distance M is less than 0.75 meters, it can be considered that the vehicle behind and the vehicle in front are in the same lane, and the two vehicles are in a following vehicle situation. The default value of T2 is 1.65 seconds, and the T2 value can also be adjusted in the mini program or APP; assuming that the difference between (N2-N1) / (t2-t1) is 3m / s, that is, assuming that the speed difference between the two vehicles is 3m / s at a certain moment, if the measured straight-line distance N2 is less than 4.95m, the following vehicle warning response will be triggered, that is, when the speed difference between the two vehicles is 3m / s, if the following vehicle distance is less than 4.95m, the following vehicle warning response will be triggered.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An active early warning radar taillight for an electric vehicle, characterized in that: The invention comprises a taillight housing (1) fixedly mounted on a rear bracket of a motorcycle or electric vehicle, and a PCB board (2) arranged in the taillight housing (1); a radar chip (3) is arranged on the PCB board (2); the radar chip (3) transmits millimeter waves to the rear to achieve real-time detection of a relative horizontal distance M and a relative linear distance N to a rear object; an MCU chip (4) is also arranged on the PCB board (2); the MCU chip (4) is electrically connected to an external sound and light alarm element; the MCU chip (4) receives measurement data of the radar chip (3) at two consecutive instants t1 and t2 and performs calculations according to a built-in program; When the relative horizontal distance M is greater than 0.75 meters and the calculated value of N2 / [(N2-N1) / (t2-t1)] is less than the set value T1 inside the MCU chip (4), the MCU chip (4) controls the sound and light alarm element to make an overtaking warning response; When the relative horizontal distance M is less than 0.75 meters and the calculated value of N2 / [(N2-N1) / (t2-t1)] is less than the set value T2 inside the MCU chip (4), the MCU chip (4) controls the sound and light alarm element to make a following vehicle warning response; The MCU chip (4) is electrically connected to the turn signal light on the vehicle through a signal feedback circuit to identify whether the turn signal light on the vehicle is in an on state. When it is identified that the turn signal light on the vehicle is in an on state, the MCU chip (4) changes the set value T1 to 1.5 times the original set value.

2. The active early warning radar taillight for electric vehicles according to claim 1, characterized in that: The PCB board (2) is also provided with a Bluetooth IC (5), and the Bluetooth IC (5) is used to achieve a Bluetooth connection with the vehicle owner.

3. The active early warning radar taillight for electric vehicles according to claim 2, characterized in that: The relative horizontal distance M that can be detected by the radar chip (3) is 4 meters.

4. The active early warning radar taillight for electric vehicles according to claim 3, characterized in that: The sound and light alarm components include a vehicle-mounted central control screen, a buzzer, and a rearview mirror warning LED light.

5. The active early warning radar taillight for electric vehicles according to claim 4, characterized in that: When an overtaking warning response occurs, the vehicle-mounted central control screen and the rearview mirror warning LED light controlled by the MCU chip (4) are in a constant light state; when a following vehicle warning response occurs, the vehicle-mounted central control screen and the rearview mirror warning LED light controlled by the MCU chip (4) are in a flashing state, and at the same time, the buzzer generates a warning frequency of 80 times per minute.

Images