Automobile safe driving auxiliary device based on brake force indication

Abstract

The utility model discloses an automobile safety driving auxiliary device based on brake force indication, which comprises an acceleration detection module, a control module and a light module, the acceleration detection module is electrically connected with the control module, the control module is electrically connected with the light module, the acceleration detection module is installed on an automobile, and the light module is electrically connected with the control module. The acceleration of the automobile in different driving states is read, an acceleration signal is sent to the control module, the control module judges whether the automobile is braked or not and the brake emergency degree according to the input acceleration signal, then outputs a corresponding control signal to the lamplight module, and controls the brightness of the lamplight module according to the brake emergency degree. According to the utility model, the braking intensity of the automobile is output by adopting the real-time monitoring of the acceleration in the running process of the automobile as a measurement standard, and the braking light is output in a mode that the original high-mount stop lamp, the lattice screen and the colored lamp strip of the automobile are mutually matched, so that the accurate judgment of a following automobile is greatly facilitated, and the probability of accidents is reduced to the greatest extent.

Description

Technical Field

[0001] The utility model relates to an automobile safe driving auxiliary device based on brake force indication. Background Art

[0002] Nowadays, intelligent equipment and technology have been developed at a high speed. Among them, intelligent driving assistance equipment has been widely used in automobile assisted driving, which has increased the driving safety factor of vehicles and effectively guaranteed the safety of driving. When the car is driving at high speed, reminding the following vehicle during emergency braking is an effective measure to prevent accidents, so that the following vehicle can better judge the driving status of the front vehicle and make accurate responses in time to ensure driving safety.

[0003] The brake indicators currently on the market can only show whether the brake is applied, but not how fast or slow it is applied. The following vehicle cannot make an accurate judgment based on the brake lights of the vehicle in front. Moreover, most of the brake indicators currently under study detect the force of the driver's brake application, which is not only cumbersome but also requires extremely high design technology. Summary of the invention

[0004] In order to solve the above technical problems, the utility model provides a safe and reliable automobile driving assistance device based on brake force indication which has a simple structure.

[0005] The utility model solves the above technical problem through a technical solution: a vehicle safe driving auxiliary device based on brake force indication, comprising an acceleration detection module, a control module, a lighting module and a power supply module, wherein the acceleration detection module is electrically connected to the control module, and the control module is electrically connected to the lighting module, wherein the acceleration detection module is installed on the vehicle, reads the acceleration of the vehicle under different driving conditions and sends the acceleration signal to the control module, wherein the control module determines whether the vehicle brakes and the degree of braking urgency according to the input acceleration signal, and then outputs a corresponding control signal to the lighting module, and controls the brightness of the lighting module according to the degree of braking urgency; and the power supply module provides working power for the entire device.

[0006] The above-mentioned automobile safe driving assistance device based on brake force indication, the control module includes a main controller, a crystal oscillator circuit, a serial port circuit, a download interface, a reset circuit and a display circuit, and the main controller is electrically connected to the crystal oscillator circuit, the serial port circuit, the download interface, the reset circuit, the display circuit, the acceleration detection module and the lighting module respectively.

[0007] The above-mentioned automobile safe driving assistance device based on brake force indication, the main controller adopts STM32F103C8T6, the VBAT pin of the main controller is connected to the power supply, which is used to power the RTC inside the single-chip microcomputer, the PC13 pin of the main controller is connected to the power-on indicator light, the PC14, PC15, PD0, and PD1 pins of the main controller are connected to the crystal oscillator circuit, the NRST pin of the main controller is connected to the reset circuit, the VSSA pin, VSS_1 pin, VSS_2 pin, and VSS_3 pin of the main controller are grounded, the VDDA pin of the main controller is connected to one end of the first inductor, one end of the seventh capacitor, and one end of the eighth capacitor, the other end of the first inductor is connected to the +3V power supply, and the seventh capacitor is connected to the +3V power supply. The other end and the other end of the eighth capacitor are grounded; the PA4, PA5, PA6, PA7, PA8, PA11, PA12, PA15, PB0, PB1, PB3, PB4, PB5, PB8, PB9, PB12, PB13, PB14, and PB15 pins of the main controller are all floating, and the PB2 pin of the main controller is grounded after passing through the second resistor; the VDD_1 pin, VDD_2 pin, and VDD_3 pin of the main controller are all connected to the +3V power supply; the PA9 and PA10 pins of the main controller are connected to the serial port circuit, the PA13 and PA14 pins of the main controller are connected to the download interface, and the BOOT0 of the main controller is floating so that the microcontroller startup mode is: boot from user flash memory.

[0008] In the above-mentioned automobile safe driving assistance device based on brake force indication, the power supply module includes a 3V power supply circuit and a 5V power supply circuit.

[0009] In the above-mentioned automobile safe driving assistance device based on brake force indication, the acceleration detection module adopts MPU6050, and the PB6 and PB7 pins of the main controller are connected to MPU6050.

[0010] The above-mentioned automobile safe driving assistance device based on brake force indication, the lighting module includes a dot matrix screen and a color light strip, the dot matrix screen and the color light strip are arranged at the rear of the vehicle, the dot matrix screen is connected to the PA1, PA2, PA3 pins of the main controller, and is used to display subtitles to remind the rear vehicles of the braking urgency; the color light strip is connected to the PA0 pin of the main controller, and the number and color of the lighted color light strips correspond to different degrees of emergency braking.

[0011] In the above-mentioned automobile safety driving assistance device based on brake force indication, the colored light strip is composed of WS2812B lamp beads, the WS2812B lamp beads integrate a processing chip and RGB three-color LED lights, and use PWM+DMA to implement single bus control protocol control. By setting PA0 to PWM output mode, each transmission of PWM data can change the brightness of the three-color LED light inside a WS2812 lamp bead, thereby realizing color control; and the number of transmissions can control the number of lamp beads. In order to improve operating efficiency, the color data of each lamp bead is listed as an array, and the data is transmitted to PWM as output through DMA.

[0012] The above-mentioned automobile safe driving assistance device based on brake force indication adopts OLED as the display circuit, and the display circuit is arranged in the main driving room of the vehicle. The PB10 and PB11 pins of the main controller are connected to the display circuit, and the display circuit displays the acceleration information of the automobile under different driving conditions.

[0013] The above-mentioned automobile safe driving assistance device based on brake force indication, the reset circuit includes a first resistor, a sixth capacitor and a reset switch, the NRST pin of the main controller is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the sixth capacitor, one end of the reset switch, and a +3V power supply, and the other end of the sixth capacitor and the other end of the reset switch are grounded.

[0014] The beneficial effect of the utility model is that the utility model uses real-time monitoring of the acceleration of the car during driving as a measurement standard to output the intensity of the car's braking, and outputs the brake light in the form of cooperation between the car's own high-mounted brake light and the dot matrix screen and color light strip of the device, which greatly facilitates the following vehicle to make accurate judgments, provides a reference for the safe driving of the following vehicle, and minimizes the probability of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall structural diagram of the utility model.

[0016] Figure 2 This is a circuit diagram of the main controller of the utility model.

[0017] Figure 3 This is a circuit diagram of the power switch module of the utility model.

[0018] Figure 4 This is a circuit diagram of the acceleration monitoring module of the utility model.

[0019] Figure 5 This is a circuit diagram of the lighting module of the utility model.

[0020] Figure 6 The utility model is a circuit diagram of the display circuit.

[0021] Figure 7 The utility model is a circuit diagram of a crystal oscillator circuit.

[0022] Figure 8 This is a circuit diagram of the serial port circuit and download interface of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 As shown, a vehicle safe driving assistance device based on brake force indication includes an acceleration detection module, a control module, a lighting module and a power module. The acceleration detection module is electrically connected to the control module, and the control module is electrically connected to the lighting module. The acceleration detection module is installed on the vehicle, reads the acceleration of the vehicle under different driving conditions and sends the acceleration signal to the control module. The control module determines whether the vehicle brakes and the urgency of braking according to the input acceleration signal, and then outputs a corresponding control signal to the lighting module to control the brightness of the lighting module according to the urgency of braking. The power module provides working power for the entire device.

[0025] The control module includes a main controller, a crystal oscillator circuit, a serial port circuit, a download interface, a reset circuit and a display circuit. The main controller is electrically connected to the crystal oscillator circuit, the serial port circuit, the download interface, the reset circuit, the display circuit, the acceleration detection module and the lighting module respectively.

[0026] like Figure 2 , Figure 7 , Figure 8As shown, the main controller adopts STM32F103C8T6, the VBAT pin of the main controller is connected to the power supply for powering the RTC inside the single-chip microcomputer, the PC13 pin of the main controller is connected to the power-on indicator light, the PC14, PC15, PD0, and PD1 pins of the main controller are connected to the crystal oscillator circuit, the NRST pin of the main controller is connected to the reset circuit, the VSSA pin, VSS_1 pin, VSS_2 pin, and VSS_3 pin of the main controller are grounded, the VDDA pin of the main controller is connected to one end of the first inductor L1, one end of the seventh capacitor C7, and one end of the eighth capacitor C8, the other end of the first inductor L1 is connected to the +3V power supply, the other end of the seventh capacitor C7 and the eighth capacitor C8 are connected The other end of capacitor C8 is grounded; the PA4, PA5, PA6, PA7, PA8, PA11, PA12, PA15, PB0, PB1, PB3, PB4, PB5, PB8, PB9, PB12, PB13, PB14, and PB15 pins of the main controller are all floating, and the PB2 pin of the main controller is grounded after passing through the second resistor R2; the VDD_1 pin, VDD_2 pin, and VDD_3 pin of the main controller are all connected to the +3V power supply; the PA9 and PA10 pins of the main controller are connected to the serial port circuit, the PA13 and PA14 pins of the main controller are connected to the download interface, and the BOOT0 of the main controller is floating so that the microcontroller startup mode is: boot from user flash memory.

[0027] The reset circuit includes a first resistor R1, a sixth capacitor C6 and a reset switch SW1. The NRST pin of the main controller is connected to one end of the first resistor R1, the other end of the first resistor R1 is connected to one end of the sixth capacitor C6, one end of the reset switch SW1, and a +3V power supply, and the other end of the sixth capacitor C6 and the other end of the reset switch SW1 are grounded.

[0028] like Figure 3 As shown, the power switch module includes a 3V power supply circuit and a 5V power supply circuit. Figure 3 The left side in the middle is the 3V power supply circuit, and the right side is the 5V power supply circuit.

[0029] like Figure 4As shown, the acceleration detection module adopts MPU6050, and the PB6 and PB7 pins of the main controller are connected to MPU6050. MPU6050 is the world's first integrated 6-axis motion processing component launched by InvenSense. Compared with the multi-component solution, it eliminates the problem of inter-axis difference when combining gyroscopes and accelerometers, and reduces the installation space. MPU6050 integrates 3-axis gyroscopes and 3-axis acceleration sensors, and contains a second IIC interface that can be used to connect external magnetic sensors, namely AUX_CL and AUX_DA, and uses its own digital motion processor (DMP: DigitalMotion Processor) hardware acceleration engine to output complete 9-axis fusion calculation data to the application end through the main IIC interface.

[0030] like Figure 5 As shown, the lighting module includes a dot matrix screen and a color light strip. Figure 5 The dot matrix screen is on the middle left. Figure 5 On the middle right is a colored light strip. The dot matrix screen and the colored light strip are set at the rear of the vehicle. The dot matrix screen is connected to the PA1, PA2, and PA3 pins of the main controller to display subtitles to remind vehicles coming from behind of how urgent or slow their brakes are. The colored light strip is connected to the PA0 pin of the main controller. The number and color of the colored light strips that light up correspond to different degrees of emergency braking.

[0031] The colored light strip is composed of WS2812B lamp beads, which integrate a processing chip and RGB three-color LED lights. The WS2812B lamp beads use PWM+DMA to implement single-bus control protocol control. By setting PA0 to PWM output mode, the PWM output transmits the waveform according to the 24BITBGR protocol of WS2812. Each time the PWM data is transmitted, the brightness of the three-color LED light inside a WS2812 lamp bead can be changed, thereby realizing color control; and the number of transmissions can control the number of lamp beads. In order to improve operating efficiency, the color data of each lamp bead is listed as an array, and the data is transmitted to PWM as output through DMA.

[0032] like Figure 6 As shown, the display circuit adopts OLED, the display circuit is arranged in the main driving room of the vehicle, the PB10 and PB11 pins of the main controller are connected to the display circuit, and the display circuit displays the acceleration information of the vehicle under different driving conditions.

[0033] The working principle of the utility model is as follows: an acceleration detection module is installed on the car, reads the acceleration of the car under different driving conditions and sends the acceleration signal to the control module, the control module displays the acceleration signal in real time in the display circuit, and at the same time the control module determines whether the vehicle brakes and the urgency of the brakes according to the input acceleration signal, and then outputs corresponding control signals to the dot matrix screen and the color light strip of the lighting module, the dot matrix screen and the color light strip are arranged at the rear of the vehicle, the dot matrix screen is used to display subtitles to remind the rear vehicles of the urgency of the brakes, and the number and color of the lighted color light strips correspond to the different urgency of the brakes, which greatly facilitates the rear vehicles to make accurate judgments, provides a reference for the safe driving of the rear vehicles, and reduces the probability of accidents to the greatest extent.

Claims

1. A vehicle safety driving assistance device based on brake force indication, comprising an acceleration detection module, a control module, a lighting module and a power module, characterized in that: The acceleration detection module is electrically connected to the control module, and the control module is electrically connected to the light module. The acceleration detection module is installed on the vehicle, reads the acceleration of the vehicle under different driving conditions and sends the acceleration signal to the control module. The control module determines whether the vehicle brakes and the degree of braking urgency based on the input acceleration signal, and then outputs a corresponding control signal to the light module to control the brightness of the light module according to the degree of braking urgency; the power module provides working power for the entire device; The control module includes a main controller, a crystal oscillator circuit, a serial port circuit, a download interface, a reset circuit and a display circuit, and the main controller is electrically connected to the crystal oscillator circuit, the serial port circuit, the download interface, the reset circuit, the display circuit, the acceleration detection module and the light module respectively; The main controller adopts STM32F103C8T6, the VBAT pin of the main controller is connected to the power supply for powering the RTC inside the single-chip microcomputer, the PC13 pin of the main controller is connected to the power-on indicator light, the PC14, PC15, PD0, and PD1 pins of the main controller are connected to the crystal oscillator circuit, the NRST pin of the main controller is connected to the reset circuit, the VSSA pin, VSS_1 pin, VSS_2 pin, and VSS_3 pin of the main controller are grounded, the VDDA pin of the main controller is connected to one end of the first inductor, one end of the seventh capacitor, and one end of the eighth capacitor, the other end of the first inductor is connected to the +3V power supply, the other end of the seventh capacitor and the other end of the eighth capacitor are connected to the +3V power supply, The PA4, PA5, PA6, PA7, PA8, PA11, PA12, PA15, PB0, PB1, PB3, PB4, PB5, PB8, PB9, PB12, PB13, PB14, and PB15 pins of the main controller are all suspended, and the PB2 pin of the main controller is grounded after passing through the second resistor; the VDD_1 pin, VDD_2 pin, and VDD_3 pin of the main controller are all connected to the +3V power supply; the PA9 and PA10 pins of the main controller are connected to the serial port circuit, the PA13 and PA14 pins of the main controller are connected to the download interface, and the BOOT0 of the main controller is suspended so that the microcontroller startup mode is: boot from user flash memory; The lighting module includes a dot matrix screen and a color light strip, which are arranged at the rear of the vehicle. The dot matrix screen is connected to the PA1, PA2, and PA3 pins of the main controller to display subtitles to remind the rear vehicle of the braking urgency; the color light strip is connected to the PA0 pin of the main controller, and the number and color of the lighted color light strips correspond to different degrees of emergency braking. The colored light strip is composed of WS2812B lamp beads, which integrate a processing chip and RGB three-color LED lights. The WS2812B lamp beads use PWM+DMA to implement single-bus control protocol control. By setting PA0 to PWM output mode, the brightness of the three-color LED lights inside a WS2812 lamp bead can be changed each time PWM data is transmitted, thereby realizing color control; and the number of transmissions can control the number of lamp beads. In order to improve operating efficiency, the color data of each lamp bead is listed as an array, and the data is transmitted to PWM as output through DMA.

2. The automobile safe driving assistance device based on brake force indication according to claim 1, characterized in that: The power supply module includes a 3V power supply circuit and a 5V power supply circuit.

3. The automobile safe driving assistance device based on brake force indication according to claim 1, characterized in that: The acceleration detection module adopts MPU6050, and the PB6 and PB7 pins of the main controller are connected to MPU6050.

4. The automobile safe driving assistance device based on brake force indication according to claim 1, characterized in that: The display circuit uses OLED, and the display circuit is arranged in the main driving room of the vehicle. The PB10 and PB11 pins of the main controller are connected to the display circuit, and the display circuit displays the acceleration information of the vehicle under different driving states.

5. The automobile safe driving assistance device based on brake force indication according to claim 1, characterized in that: The reset circuit includes a first resistor, a sixth capacitor and a reset switch. The NRST pin of the main controller is connected to one end of the first resistor, the other end of the first resistor is connected to one end of the sixth capacitor, one end of the reset switch, and a +3V power supply, and the other end of the sixth capacitor and the other end of the reset switch are grounded.

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