A scrolling marquee based radar taillight circuit

Abstract

The utility model relates to a riding vehicle accessory technical field, concretely relates to a radar tail light circuit based on running marquee, including radar module, main control module, running marquee module and switching power supply module, radar module is connected with main control module communication, and the distance and speed of target are obtained according to the difference of emission wave signal and echo signal;Main control module is connected with running marquee module signal, and sends early warning signal according to the distance and speed of target;Running marquee module shows corresponding running marquee early warning image according to the early warning signal;Switching power supply module radar module, main control module and running marquee module provide working power supply. The utility model combines running marquee with radar and detects the rear target in real time, and the early warning prompt is carried out through light. Running marquee is through the rich multi-mode light display form, reminds the rear car to avoid, is more easy to cause the attention of rear target, and the interesting nature is strong, has improved the warning effect of radar tail light effectively, has reduced the occurrence of rear-end collision situation.

Description

Technical Field

[0001] This utility model relates to the field of bicycle accessory technology, specifically to a radar taillight circuit based on a running light. Background Technology

[0002] Automotive radar has a wide range of applications in modern vehicles, primarily to enhance driving safety and enable Advanced Driver Assistance Systems (ADAS) and autonomous driving functions. Specific applications include parking assistance, adaptive cruise control (ACC), automatic emergency braking (AEB), blind spot monitoring, lane change assist, rear collision warning (RCW), pedestrian detection, and advanced autonomous driving stages. By providing precise distance, speed, and angle information, automotive radar significantly enhances a vehicle's environmental perception capabilities, thereby improving driving safety and comfort.

[0003] When in use, cycling radar is typically placed at the rear of the bicycle. Integrating it with the taillight greatly enhances its integration and convenience. A radar taillight is a smart device that combines radar technology with taillight functionality, primarily used to improve cycling or driving safety. These products usually have radar detection capabilities, able to detect vehicles approaching from behind and alert the rider to potential hazards through lights, sounds, or other warning signals. In the cycling field, radar taillights, through built-in radar technology, can accurately detect the approach of vehicles behind and alert the rider through flashing modes, radar warnings, and other functions. These products not only improve the safety of nighttime cycling but also increase the convenience and enjoyment of riding.

[0004] Currently, most commercially available radar taillights use a single LED, with a clear distinction between the light and radar components. They are relatively large, have a limited range of lighting modes, and offer limited visibility to following vehicles. Therefore, it is necessary to design an optimized radar taillight solution to enhance its warning capabilities. Utility Model Content

[0005] Based on the above description, this utility model provides a radar taillight circuit based on a running light, which enhances the warning effect of the radar taillight and improves the safety and fun of riding.

[0006] According to a first aspect of the present invention, the present invention provides a radar taillight based on a running light, including a housing and a circuit board disposed within the housing. The circuit board is provided with a radar and a running light, the running light being arranged around the radar. The housing is provided with an annular light-transmitting strip, the annular light-transmitting strip being adapted to the running light.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Preferably, the running light includes a plurality of LED beads arranged in a ring, and a lens structure corresponding to each of the plurality of LED beads is provided on the ring light-transmitting strip, and the lens structure is provided with optical textures in the circumference.

[0009] Preferably, the circuit board is further provided with an indicator light, and the housing is provided with a light guide column adapted to the indicator light, the light guide column penetrating the housing.

[0010] Preferably, the circuit board is further provided with a switch, a battery and an external interface, and the switch, battery and external interface are located on the side of the circuit board opposite to the running light.

[0011] According to a second aspect of this utility model, this utility model also provides a radar taillight circuit based on a running light, including a radar module, a main control module, a running light module, and a switching power supply module, wherein:

[0012] The radar module is communicatively connected to the main control module and is used to obtain the target's distance and speed based on the difference between the transmitted wave signal and the echo signal.

[0013] The main control module is connected to the scrolling light module and is used to issue a warning signal based on the distance and speed of the target.

[0014] The scrolling light module is used to display the corresponding scrolling light warning image according to the warning signal;

[0015] The switching power supply module is used to provide operating power to the radar module, the main control module, and the scrolling light module.

[0016] Preferably, the radar module includes a radar antenna board, an antenna power-on switch, a signal preprocessing circuit, and a radar MCU, wherein:

[0017] The two ends of the switching channel of the antenna power-on switch are connected to the switching power supply module and the radar antenna board respectively. The control terminal of the antenna power-on switch is connected to the radar MCU to receive the antenna power-on enable signal.

[0018] The radar antenna plate is used to transmit wave signals and receive echo signals;

[0019] The input terminal of the signal preprocessing circuit is connected to the radar antenna board, and the output terminal of the signal preprocessing circuit is connected to the sampling terminal of the radar MCU, which is used to filter the transmitted wave signal and the echo signal and isolate the signal.

[0020] The radar MCU is used to sample the preprocessed transmitted wave signal and echo signal, and calculate the target's distance and speed based on the difference between the transmitted wave signal and the echo signal.

[0021] Preferably, the main control module includes a Bluetooth MCU and a Bluetooth antenna connected to each other, wherein:

[0022] The Bluetooth MCU is communicatively connected to the radar MCU and is used to determine whether to issue a warning signal based on the distance and speed of the target.

[0023] The Bluetooth antenna is used for external communication and to report early warning status.

[0024] Preferably, the running light module includes a driver module and multiple LED beads. The input terminal of the driver module is communicatively connected to the main control module, and the multiple output terminals of the driver module are connected one-to-one with the multiple LED beads, for independently controlling the state of each LED bead according to the warning signal.

[0025] Preferably, it also includes a sensor module, which is communicatively connected to the main control module and used to monitor the vehicle's motion status data.

[0026] Preferably, the switching power supply module includes a battery, a charging circuit, a power switching circuit, a voltage conversion circuit, and a linear voltage regulator circuit, wherein:

[0027] The input terminal of the charging circuit is used to connect to the charging interface, and the output terminal of the charging circuit is connected to the battery. The charging circuit is provided with a power detection unit, which is connected to the main control module.

[0028] The input terminal of the linear voltage regulator circuit is connected to the battery, and its output terminal outputs a first voltage, which is used to provide working power for the radar module, the main control module and the scrolling light module.

[0029] The power switch circuit is equipped with a manual switch, and the output terminal of the power switch circuit is connected to the control terminal of the linear voltage regulator circuit. The power switch circuit is used to control the working state of the linear voltage regulator circuit.

[0030] The input terminal of the voltage conversion circuit is connected to the battery, and its output terminal outputs a second voltage, which provides driving power for the running light module.

[0031] Compared with existing technologies, the technical solution of this application has the following beneficial technical effects: This utility model combines a running light with radar. The radar is used to detect following vehicles in real time, and when the warning trigger condition is met, the running light provides a light prompt. The running light uses rich and multi-mode light display forms and high brightness to remind following vehicles to pay attention and avoid them, making it easier to attract the attention of following targets, with a stronger warning effect and greater entertainment value. Moreover, compared with traditional solutions, the brightness of this radar taillight is higher than that of a single LED, effectively improving the warning effect of the radar taillight and reducing the occurrence of rear-end collisions. Arranging the running light around the radar module facilitates the miniaturization of the overall device structure, improving portability. At the same time, within a limited space, a larger lighting area can be obtained, enhancing the warning effect. Attached Figure Description

[0032] Figure 1 A schematic diagram of the overall appearance structure of the radar taillight from a certain perspective, provided in an embodiment of this utility model;

[0033] Figure 2 is a schematic diagram of the overall appearance structure of the radar taillight from another perspective of the embodiment of this utility model;

[0034] Figure 3 A cross-sectional view of the radar taillight provided in an embodiment of this utility model;

[0035] Figure 4 This is a schematic diagram of the disassembly structure of the radar taillight housing cover provided in an embodiment of the present utility model;

[0036] Figure 5 A bottom view of the lens on the radar taillight housing provided in an embodiment of this utility model;

[0037] Figure 6 A schematic diagram of the overall principle of the radar taillight circuit provided in this embodiment of the utility model;

[0038] Figure 7 A circuit block diagram of a switching power supply module provided for an embodiment of this utility model;

[0039] Figure 8 A block diagram of the radar module circuit provided for an embodiment of this utility model;

[0040] Figure 9 A schematic diagram of the main control module circuit provided in this embodiment of the utility model;

[0041] Figure 10 A schematic diagram of the indicator light circuit provided in this embodiment of the utility model;

[0042] Figure 11 A schematic diagram of the circuit principle of the running light module provided in this embodiment of the utility model;

[0043] Figure 12 This is a schematic diagram of the accelerometer circuit provided in an embodiment of the present invention.

[0044] The attached diagram lists the components represented by each number as follows:

[0045] 1. Housing; 101. Top cover; 1011. Annular light-transmitting strip; 1011a. Lens; 1011b. Optical texture; 1012. Light guide column; 1013. Opaque component; 102. Base; 1021. Button; 1022. Sealing plug; 1023. Mounting base; 1024. Lanyard hole; 2. Circuit board; 201. Radar; 202. Scrolling light; 203. Indicator light; 204. Switch; 205. Battery; 206. External interface. 3. Radar module; 301. Radar antenna board; 302. Antenna power-on switch; 303. Signal preprocessing circuit; 304. Radar MCU; 305. Radar power-on switch; 4. Main control module; 5. Scrolling light module; 6. Switching power supply module; 601. Charging interface; 602. Charging circuit; 603. Power detection unit; 604. Voltage conversion circuit; 605. Power switch circuit; 606. Linear voltage regulator circuit; 7. Sensor module. Detailed Implementation

[0046] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0048] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "under" or "below" of other elements or features will be oriented "over" of other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0049] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0050] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0051] like Figure 1 Figure 2 shows the external structure of a radar taillight based on a running light according to this embodiment from multiple perspectives. Figure 3 A cross-sectional view of the radar taillight is shown.

[0052] Combination Figures 1-3 As shown, this embodiment provides a radar taillight based on a running light, including a housing 1 and a circuit board 2 disposed within the housing 1. The housing 1 includes a top cover 101 and a base 102, which are connected to form an internal accommodating space. The circuit board 2 is disposed within this accommodating space and fixedly mounted to the base 102 with screws. A radar 201 and a running light 202 are fixedly mounted on the circuit board 2 to... Figures 1-3 Taking the perspective of [unclear], the radar 201 is positioned in the center of the top surface of the circuit board 2, and the running light 202 is arranged around the radar 201 to form a racetrack shape. The upper cover 101 of the housing 1 is provided with an annular light-transmitting strip 1011, which is adapted to the running light 202. When the running light 202 is lit, its light is emitted through the annular light-transmitting strip 1011, forming a dynamic image of the running light 202 that combines brightness and fun.

[0053] Understandably, based on the deficiencies pointed out in the background technology, this embodiment combines the running light 202 with the radar 201. The radar 201 is used to detect following vehicles in real time. When the warning trigger condition is met, the running light 202 provides a light prompt. The running light 202 uses rich, multi-mode light display forms, such as waterfall flashing and comet flashing, to dynamically remind following vehicles to avoid the vehicle with high brightness, making it easier to attract the attention of following targets and providing a stronger warning effect and greater entertainment value. Moreover, compared with traditional solutions, the brightness of this radar taillight is higher and the light-emitting area is larger than that of a single LED, effectively improving the warning effect of the radar taillight and reducing the occurrence of rear-end collisions. Arranging the running light 202 around the radar module 3 facilitates the overall miniaturization of the device structure, improving portability. At the same time, within a limited space, a larger lighting area can be obtained, enhancing the warning effect.

[0054] from Figure 3 As can be seen, the running light 202 includes multiple LED beads, which are arranged in a racetrack-like circular shape near the edge of the circuit board 2, surrounding the radar 201. Figure 4 The diagram shows the disassembled structure of the upper cover 101. The upper cover 101 includes a semi-transparent body (e.g., made of PCEXL1414 material) and opaque parts 1013 (e.g., made of ABS-757H material). The semi-transparent body serves as the main support component. Multiple opaque parts 1013 are fixedly connected to and cooperate with the semi-transparent body. Due to the light-blocking effect of the opaque parts 1013, an annular light-transmitting strip 1011 adapted to the running light 202 is formed on the semi-transparent body. Figure 5 The image shown is a bottom view of the semi-transparent component, illustrating its structure within the accommodating space. From... Figure 5 As can be seen, the annular light-transmitting strip 1011 is provided with lens 1011a structures corresponding to multiple LED beads, and all lenses 1011a are combined to form a racetrack-like circular shape. Lenses 1011a can enhance the focusing effect of the running light 202, thus improving its brightness. The lens 1011a structure has circumferential optical textures 1011b, for example... Figure 5 The diagram shows multiple circular patterns arranged along the entire annular light-transmitting band 1011, or multiple Fresnel patterns arranged separately along a single lens 1011a. The optical patterns 1011b can improve the optical effect of the lens 1011a while saving material on the housing 1.

[0055] Combination Figure 1 , Figures 3-5As shown, the circuit board 2 is also equipped with an indicator light 203, which can be a high-brightness multi-color light. The indicator light 203 is used to indicate various working states of the radar tail light. The housing 1 is provided with a light guide post 1012 adapted to the indicator light 203. The light guide post 1012 passes through the housing 1 through a light guide hole provided on the housing 1. The light guide post 1012 is made of a fully transparent material (e.g., PCEXL1414). The light guide post 1012 effectively guides and distributes the light emitted by the indicator light 203 to improve the display effect of the indicator light 203.

[0056] like Figure 3 As shown in the cross-sectional view, the circuit board 2 is also equipped with a switch 204, a battery 205, and an external interface 206. The switch 204, battery 205, and external interface 206 are located on the side of the circuit board 2 opposite to the running light 202. Specifically, the switch 204 is fixedly connected to the circuit board 2, and a spring-loaded button 1021 is provided on the base 102 of the housing 1. The button 1021 abuts against the operating end of the switch 204. When the button 1021 is pressed, the switch 204 can be operated. The switch 204 is used to turn the radar taillight on or off. The external interface can be a common USB interface, such as a Type-C interface, for connecting external devices or charging. Since the battery 205 has a certain height, placing the switch 204 and the external interface, which also have a relatively large height, on the same side of the circuit board 2 is beneficial for making full use of the internal space of the housing 1 and for miniaturizing the device design. To increase the stability of battery 205 installation, the bottom surface of battery 205 can be adhered to the base 102 using thermal adhesive or foam adhesive. To provide dust and water protection for external interface 206 and improve the device's IP protection rating, it can be as follows: Figure 2a and Figure 2b As shown, an openable sealing plug 1022 that matches the external interface can be provided on the base 102. When the device is not using the external interface, the external interface 206 is sealed by the sealing plug 1022.

[0057] To facilitate the installation of the radar taillight, a mounting bracket 1023 can be provided on the base 102. To improve the portability of the radar taillight and prevent it from being lost accidentally, a lanyard hole 1024 can also be provided on the outer side of the base 102 for attaching a safety rope.

[0058] Please see Figure 6 As shown in the circuit block diagram, this embodiment also provides a radar taillight circuit based on a running light, including a radar module 3, a main control module 4, a running light module 5, and a switching power supply module 6, wherein:

[0059] The radar module 3 is communicatively connected to the main control module 4 and is used to obtain the target's distance and speed based on the time difference between the transmitted wave signal and the echo signal.

[0060] The main control module 4 is connected to the running light module 5 by signal, and is used to issue a warning signal based on the distance and speed of the target;

[0061] The scrolling light module 5 is used to display the corresponding scrolling light warning image according to the warning signal;

[0062] The switching power supply module 6 is used to provide operating power to the radar module 3, the main control module 4, and the scrolling light module 5.

[0063] It is understood that the switching power supply module 6 provides operating power for the entire device. The radar module 3 emits a transmitted wave signal and receives the echo signal returned from the target. By analyzing the difference between the transmitted wave signal and the echo signal, such as the time difference, the distance between the target and the vehicle can be calculated. Then, by observing the continuous change pattern of the difference between the transmitted wave signal and the echo signal, the relative speed of the target approaching the vehicle can be obtained. The obtained distance and speed data can be used as a basis for judging whether a rear-end collision has occurred between the target and the vehicle. The method of calculating distance and speed by radar through the time difference between the transmitted wave and the echo is existing technology and will not be elaborated here. After assessing the rear-end collision risk, the main control module 4 determines that there is no risk of rear-end collision and does not issue a warning signal; if it determines that there is a risk of rear-end collision, it immediately issues a warning signal to drive the running light module 5 to provide light prompts according to the preset warning image. The running light warning image can be set through the main control module 4, and multiple light warning modes can be preset according to the dot matrix control principle.

[0064] In one possible implementation, such as Figure 7 The diagram shown is a block diagram of the switching power supply module 6. Figure 7 As shown, the switching power supply module 6 includes a battery 205, a charging circuit 602, a power switching circuit 605, a voltage conversion circuit 604, and a linear voltage regulator circuit 606, wherein:

[0065] (1). The input terminal of the charging circuit 602 is used to connect to the charging interface 601 (e.g., Figure 7The output of the charging circuit 602 (shown as a TYPE-C interface) is connected to the battery 205 to charge it. The charging circuit 602 can be implemented using a charging chip (model AW32006SPR). The charging circuit 602 includes a power detection unit 603, which is connected to the main control module 4. For example, the power detection unit 603 can be implemented using a coulomb meter (model CW2215BAAC / OM70201WV). The coulomb meter is used to feed back the power status of the battery 205 to the main control module 4 as a basis for determining whether to activate the low-brightness power-saving mode.

[0066] (2). The input terminal of the linear voltage regulator circuit 606 is connected to the battery 205, and its output terminal outputs a first voltage, for example... Figure 7 The voltage VCC_2V6 (+2.6V) shown is used to provide operating power for the radar module 3, main control module 4, and scrolling light module 5. The linear regulator circuit 606 can be implemented using a low dropout linear regulator (e.g., AW37420STR / SGM61020S / ETA5050 / LP3981H-02 / SGM2053S-ADJ).

[0067] (3). The power switch circuit 605 is equipped with a manual switch 204, for example... Figure 3 The manual push-button switch 204 shown in the structural diagram is preferably model K2-1109SE-A4SW / HRO. The output terminal of the power switch circuit 605 is connected to the control terminal of the linear voltage regulator circuit 606, and the power switch circuit 605 is used to control the operating state of the linear voltage regulator circuit 606. The power switch circuit 605 can be implemented based on the application circuit of the cold reset and battery 205 disconnection switch 204 chip SGM4075-1.

[0068] (4). The input terminal of the voltage conversion circuit 604 is connected to the battery 205, and its output terminal outputs a second voltage, for example... Figure 7 The voltage VCC_3V3 (+3.3V) shown is the second voltage that provides the driving power for the running light module 5. The voltage conversion circuit 604 is used to convert the voltage of the battery 205 into a stable second voltage, which can be implemented based on the DC-DC chip JW5250A.

[0069] In one possible implementation, such as Figure 8 As shown, the radar module 3 includes a radar antenna board 301, an antenna power-on switch 302, a signal preprocessing circuit 303, and a radar MCU 304, wherein:

[0070] (1). The radar antenna board 301 is connected to the radar MCU 304 via SPI bus and is also connected via some IO ports; the 24G Hz millimeter wave radar 201 antenna is mounted on the radar antenna board 301 and is used to emit millimeter wave transmission signals and receive echo signals.

[0071] (2) In this embodiment, the antenna power-on switch 302 adopts a P-MOS (e.g., model YJL2101W). The two ends of the switching channel of the antenna power-on switch 302 are connected one-to-one to the power-on enable terminal of the switching power supply module 6 (VCC_2V6) and the radar antenna board 301. The control terminal of the antenna power-on switch 302 is connected to the radar MCU 304. The radar MCU 304 outputs an antenna power-on enable signal to the control terminal of the P-MOS. When the antenna power-on enable signal is valid, the radar antenna board 301 is powered on and operates.

[0072] (3) The input terminal of the signal preprocessing circuit 303 is connected to the radar antenna board 301, and the output terminal of the signal preprocessing circuit 303 is connected to the ADC sampling terminal of the radar MCU 304, used to filter and isolate the transmitted wave signal and the echo signal. Figure 8 As shown, there are two signal preprocessing circuits 303, one for preprocessing the transmitted signal and the other for preprocessing the echo signal. Specifically, the original signal is first filtered by an RC filter to remove interference signals and ensure the radar signal IF (e.g., ...) is processed. Figure 8 The signal (IF1 or IF2) is transmitted completely and correctly to the subsequent circuit. Then, through the operational amplifier OPA (e.g., LMV358TP / AWS79032), the operational amplifier OPA acts as a follower to filter the signal after the RC filter and provide electrical isolation. The pre-processed signal is then transmitted completely and correctly to the ADC sampling terminal of the MCU.

[0073] (4) The radar MCU304 can be implemented using a microcontroller model AT32F403A, which is used to sample the preprocessed transmitted wave signal and echo signal, and calculate the target's distance and velocity based on the time difference between the transmitted wave signal and the echo signal. The power-on enable terminal of the radar MCU304 is also equipped with a radar power-on switch 305load Switch, which is controlled by the main control module 4. When the main control module 4 controls the radar power-on switch 305load Switch to be turned on, the radar MCU304 is powered on and running; when the main control module 4 controls the radar power-on switch 305load Switch to be turned off, the radar MCU304 is powered off. The radar MCU304 is also connected to the main control module 4 through a UART serial port and some I / O ports.

[0074] In one possible implementation, such as Figure 9 As shown, a Bluetooth module is used as the main control module 4. The main control module 4 includes a Bluetooth MCU and a Bluetooth antenna that are interconnected, wherein:

[0075] The Bluetooth MCU is communicatively connected to the radar MCU304 and is used to determine whether to issue a warning signal based on the distance and speed of the target.

[0076] The Bluetooth antenna is used for external communication and to report early warning status.

[0077] In this embodiment, as Figure 9 As shown, the Bluetooth MCU U12 is implemented using the low-power RF chip nRF52832-QFAA-R. Please refer to the pin function allocation information of the Bluetooth MCU U12 shown in the table below:

[0078]

[0079] Combining the above table and Figure 9As shown, the Bluetooth MCU U12 relies on the first voltage (VCC_2V6) output by the switching power supply module 6 for its operating power. The antenna pin ANT of the Bluetooth MCU U12 is connected to the Bluetooth antenna through an LC oscillator composed of multiple inductors and capacitors, enabling the transmission and reception of Bluetooth signals and thus communication with external devices. For example, real-time target monitoring information and warning information can be transmitted to an APP or cycling computer, visualizing the situation of vehicles behind the cyclist and reminding the rider to ride carefully, thereby improving cycling safety. The Bluetooth MCU U12 communicates with the radar MCU 304 through a set of UART serial ports (P0.16 and P0.17), and provides the radar 201 power-on enable signal to the radar MCU 304 through port P0.15. The Bluetooth MCU U12 communicates with the running light module 5 through the I2C1 bus (P0.26 and P0.25), and also outputs the running light 202 enable signal to the running light module 5 through port P0.14. The Bluetooth MCU U12 uses the I2C0 bus (ports P0.01 and P0.02) as a communication channel with various sensors (e.g., the accelerometer), and obtains sensor interrupt signals through port P0.10. The Bluetooth MCU U12 uses the SWDIO and SWCLK pins as program debugging channels. The Bluetooth MCU U12 uses a set of UART serial ports (ports P0.03 and P0.04) as test channels. The Bluetooth MCU U12 outputs a charging enable signal to the switching power supply module 6 through port P0.05, obtains the input status signal of the charging interface 601 through port P0.07, obtains the status detection signal of the charging switch 204 through port P0.09, and obtains the hold status signal of the power switch circuit 605 through port P0.08. The clock circuit of the Bluetooth MCU U12 is set using conventional methods and will not be described further here.

[0080] The radar taillight circuit also includes an indicator light 203 circuit that is connected to the Bluetooth MCU U12 via an I / O port. Figure 10 To and Figure 9 The Bluetooth MCU U12 signal is connected to the indicator light 203 circuit. For example... Figure 10 As shown, the Bluetooth MCU U12 outputs blue, red, and green light control signals to the indicator light 203 circuit through ports P0.11, P0.12, and P0.13. The indicator light 203 circuit includes a tri-color LED D2, for example, model 19-337 / R6GHBHC-A01 / 2T / EVERLIGHT. The three input terminals of the tri-color LED D2 (blue, red, and green) are connected one-to-one to ports P0.11, P0.12, and P0.13 of the Bluetooth MCU U12, and the three output terminals of the tri-color LED D2 are grounded.

[0081] In one possible implementation, such as Figure 11As shown, the running light module 5 includes a driver module U26 and multiple LED beads (D6~D17). The driver module U26 can be implemented using model AW21012, and the LED beads can be implemented using model LL836R6AC-H01T4. The input terminal of the driver module U26 is connected to the Bluetooth MCU U12 via an I2C1 bus, and the multiple output terminals of the driver module U26 are connected one-to-one with the LED beads D6~D17, used to independently control the state of each LED bead according to the warning signal, for example, by pre-programming multiple LED beads to flash in patterns such as waterfall flashing or comet flashing for light indication.

[0082] In one possible implementation, such as Figure 12 As shown, a sensor module 7 is also provided. The sensor module 7 is illustrated using accelerometer U13 (model SC7A22) as an example. Accelerometer U13 uses the VCC_2V6 output from the switching power supply module 6 as its operating power. Accelerometer U13 communicates with the Bluetooth MCU U2 via an I2C0 bus. Its interrupt signal pin INT1 is connected to the P0.10 port of Bluetooth MCU U2. Accelerometer U13 is used to monitor the vehicle's motion status data and upload it to Bluetooth MCU U2, for example, whether the vehicle is moving forward or stationary. Based on the monitored vehicle motion status, Bluetooth MCU U2 determines whether the vehicle is braking, stationary, or in other real-time states. Bluetooth MCU U2 outputs a corresponding response, such as a high-brightness indicator for braking and a low-brightness indicator for power saving when stationary.

[0083] In the radar taillight solution provided by this utility model, a running light 202 is combined with a radar 201. The radar 201 is used to detect following vehicles in real time. When the warning trigger condition is met, the running light 202 provides a light prompt. The running light 202 uses a variety of multi-mode light display formats and high brightness to remind following vehicles to avoid it, making it easier to attract the attention of following targets and providing a stronger warning effect and greater entertainment value. Moreover, compared with traditional solutions, the brightness of this radar taillight is higher than that of a single LED, effectively improving the warning effect of the radar taillight and reducing the occurrence of rear-end collisions. Arranging the running light 202 around the radar module 3 facilitates the overall miniaturization of the device structure, improving portability. At the same time, within a limited space, a larger lighting area can be obtained, enhancing the warning effect.

[0084] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A radar taillight circuit based on a running light, characterized in that, It includes a radar module (3), a main control module (4), a scrolling light module (5), and a switching power supply module (6), wherein: The radar module (3) is communicatively connected to the main control module (4) and is used to obtain the target's distance and speed based on the difference between the transmitted wave signal and the echo signal. The main control module (4) is connected to the running light module (5) and is used to issue a warning signal based on the distance and speed of the target; The marquee module (5) is used to display the corresponding marquee warning image according to the warning signal; The switching power supply module (6) is used to provide working power for the radar module (3), the main control module (4) and the running light module (5).

2. The radar taillight circuit based on a running light according to claim 1, characterized in that, The radar module (3) includes a radar antenna board (301), an antenna power-on switch (302), a signal preprocessing circuit (303), and a radar MCU (304), wherein: The two ends of the switching channel of the antenna power-on switch (302) are connected to the switching power supply module (6) and the radar antenna board (301) respectively. The control terminal of the antenna power-on switch (302) is connected to the radar MCU (304) to receive the antenna power-on enable signal. The radar antenna plate (301) is used to transmit wave signals and receive echo signals; The input terminal of the signal preprocessing circuit (303) is connected to the radar antenna board (301), and the output terminal of the signal preprocessing circuit (303) is connected to the sampling terminal of the radar MCU (304), which is used to filter the transmitted wave signal and the echo signal and isolate the signal. The radar MCU (304) is used to sample the preprocessed transmitted wave signal and echo signal, and calculate the target's distance and speed based on the difference between the transmitted wave signal and the echo signal.

3. A radar taillight circuit based on a running light according to claim 2, characterized in that, The main control module (4) includes a Bluetooth MCU and a Bluetooth antenna that are interconnected, wherein: The Bluetooth MCU is communicatively connected to the radar MCU (304) and is used to determine whether to issue a warning signal based on the distance and speed of the target. The Bluetooth antenna is used for external communication and to report early warning status.

4. A radar taillight circuit based on a running light according to claim 3, characterized in that, The running light module (5) includes a driving module and multiple LED beads. The input end of the driving module is communicatively connected to the main control module (4), and the multiple output ends of the driving module are connected one-to-one with the multiple LED beads to independently control the state of each LED bead according to the warning signal.

5. A radar taillight circuit based on a running light according to any one of claims 1 to 4, characterized in that, It also includes a sensor module (7), which is communicatively connected to the main control module (4) and is used to monitor the vehicle's motion status data.

6. A radar taillight circuit based on a running light according to any one of claims 1 to 4, characterized in that, The switching power supply module (6) includes a battery (205), a charging circuit (602), a power switching circuit (605), a voltage conversion circuit (604), and a linear voltage regulator circuit (606), wherein: The input terminal of the charging circuit (602) is used to connect to the charging interface (601), and the output terminal of the charging circuit (602) is connected to the battery (205). The charging circuit (602) is provided with a power detection unit (603), and the power detection unit (603) is connected to the main control module (4). The input terminal of the linear voltage regulator circuit (606) is connected to the battery (205), and its output terminal outputs a first voltage, which is used to provide working power for the radar module (3), the main control module (4) and the running light module (5). The power switch circuit (605) is equipped with a manual switch (204). The output terminal of the power switch circuit (605) is connected to the control terminal of the linear voltage regulator circuit (606). The power switch circuit (605) is used to control the working state of the linear voltage regulator circuit (606). The input terminal of the voltage conversion circuit (604) is connected to the battery (205), and its output terminal outputs a second voltage, which provides driving power for the running light module (5).

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