Two-wheeled vehicle riding anti-collision early warning system based on millimeter wave radar perception

Abstract

The utility model discloses a two-wheeled vehicle riding anti-collision early warning system based on millimeter wave radar perception, which comprises an early warning information collection module, an information processing module and a warning information broadcasting module, and is characterized in that the early warning information collection module consists of a traditional early warning information collection part and a millimeter wave radar early warning information collection part; wherein the traditional early warning information collection part comprises a left steering lamp and a right steering lamp from a grip button and a brake lamp of a brake grip; the millimeter-wave radar early warning information collection part comprises millimeter-wave radars at the head / tail of the two-wheeled vehicle, and the warning information broadcasting module is responsible for reminding a two-wheeled vehicle driver and other vehicles of received millimeter-wave radar early warning information and traditional early warning information in a lamplight mode. According to the system, the signal lamps are added to display positions, so that the problems that the motor vehicle cannot perceive a warning signal in a sight blind area and during driving at night are solved, and meanwhile, two-wheeled vehicle traffic accidents caused by the fact that other traffic participants fail to perceive the warning signal are reduced in a form of actively broadcasting early warning information.

Description

Technical Field

[0001] The utility model relates to the field of detection circuits, and particularly to a two-wheeler riding anti-collision warning system based on millimeter-wave radar perception. Background Art

[0002] When two-wheelers participate in public transportation, due to their small mass, slow speed, and low kinetic energy, they exist as vulnerable parties. Usually, the occurrence of two-wheeler traffic accidents is caused by other traffic participants such as motor vehicles. Among 730 non-motor vehicle-related cases in 2018, 659 accidents occurred between motor vehicles and non-motor vehicles, accounting for 90.27%. Therefore, if effective reminders can be given to motor vehicles and other traffic participants before a danger occurs, the occurrence of traffic accidents will be greatly reduced. The occurrence of danger is often accompanied by the inability of motor vehicles to effectively perceive the driving intention of two-wheelers and the overly close vehicle distance.

[0003] The traditional reminder for other traffic participants by two-wheelers mainly relies on the taillight group installed at the rear of the vehicle. However, considering the size difference between two-wheelers and motor vehicles, the taillights are often in the blind spot of the A-pillar vision of motor vehicle drivers; in addition, when driving at night, motor vehicle drivers often cannot clearly perceive the body contour of non-motor vehicle drivers, resulting in scratches. Therefore, increasing the position of the signal lights can effectively avoid the above problems. Further, millimeter-wave radar, with its high resolution, excellent penetration ability, high speed, and ranging accuracy, has been increasingly widely and maturely applied in fields such as automotive blind spot detection (BSD), front / rear collision warning (FCW / RCW), and lane change assist (LCA) in recent years. After solving the cost problem, it is very suitable for the vehicle distance measurement, speed measurement, and danger warning scenarios of two-wheelers. Summary of the Utility Model

[0004] In view of the above deficiencies in the prior art, the utility model provides a two-wheeler riding anti-collision warning system based on millimeter-wave radar perception.

[0005] To achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0006] A two-wheeler riding anti-collision warning system based on millimeter-wave radar perception includes a warning information collection module, an information processing module, and a warning information broadcast module;

[0007] The warning information collection module includes a traditional warning information collection unit and a millimeter-wave radar warning information collection unit;

[0008] The information processing module includes a two-wheeler active warning system and an intelligent helmet active warning system;

[0009] The warning information broadcasting module includes a two-wheeler dashboard, two-wheeler turn signals and brake lights, two-wheeler strobe lights, helmet outline lights, helmet turn signals and brake lights, and helmet strobe lights;

[0010] Among them, the two-wheeler active warning system is respectively connected to the traditional warning information collection unit, the millimeter-wave radar warning information collection unit, and the intelligent helmet active warning system, and outputs high and low level signals to the two-wheeler dashboard, two-wheeler turn signals and brake lights, and two-wheeler strobe lights; the intelligent helmet active warning system outputs high and low level signals to the helmet outline lights, helmet turn signals and brake lights, and helmet strobe lights.

[0011] Further, the millimeter-wave radar warning information collection circuit is a CAN signal transceiver circuit inside the millimeter-wave radar, including a CAN transceiver module U1, capacitors C1, C2, C3, C4, C5, C6, and C8, resistors R1, R2, R3, R4, R5, R6, and R7, a common-mode choke L1, and a transient diode D1, where:

[0012] The CAN transceiver module U1 is a TJA1043TK chip. Its TXD pin is connected to the RXCAN pin of the MCU for sending demodulated CAN data; the VCC pin is connected to the 5V power supply to provide a reference voltage for CAN signal transmission; the RXD pin is connected to the TXCAN pin of the MCU; the CAN_EN signal from the MCU and the 3.3V voltage after being stepped down by the resistor R8 are jointly connected to the EN pin to enable the CAN transceiver; the INH pin is connected to the PW_EN_CAN signal to control the enabling of the power supply module of the CAN signal transmission part; the ERR pin is connected to the CAN_ERR signal of the MCU to indicate CAN transceiver faults; the Wake pin is a wake-up input port and is connected to the +12v voltage through the resistor R6; the Vbat pin is a battery voltage power supply port, is connected to the +12v voltage through the resistor R6 and is grounded through the capacitor C7; the Split pin is connected to the terminal voltage VSPLIT voltage distribution point; the CANH pin and the CANL pin are connected to the common-mode choke L1 and are connected to the CANH and CANL signal lines through L1 for differential signal output; the STB pin receives the CAN_STB signal of the MCU and is grounded through the resistor R2 to control the CAN transceiver chip to enter the standby mode;

[0013] The capacitor C1 is connected between the +5V_CAN power supply and the ground, and C2, C3, and C4 are respectively connected between the system voltage VCC3V3 and the ground;

[0014] The resistor R1 is connected between the system voltage VCC3V3 and the terminal voltage VSPLIT to avoid current loops during cross-connection;

[0015] The transient diode D1 is a three-terminal transient voltage suppression diode, whose control terminal is connected to the terminal voltage VSPLIT through a capacitor C6 and a resistor R4 in sequence, and its two output terminals are respectively connected to the CANH and CANL signal lines;

[0016] One end of the resistor R3 is connected to the terminal voltage VSPLIT through a resistor R4, the other end is connected to the CANH signal line and grounded through a capacitor C5; one end of the resistor R7 is connected to the terminal voltage VSPLIT through a resistor R4, and the other end is connected to the CANL signal line and grounded through a capacitor C8.

[0017] Further, the active warning system for two-wheeled vehicles includes:

[0018] A vehicle-mounted CAN signal transceiver circuit, which is responsible for the physical layer transmission and reception of CAN bus signals;

[0019] A 2.4GHz radio frequency signal transmitting circuit, which is used to transmit 2.4GHz radio frequency signals carrying warning information.

[0020] Further, the vehicle-mounted CAN signal transceiver circuit includes:

[0021] A CAN bus transceiver U6, an external signal interface J1, a decoupling capacitor C9, a voltage stabilizing capacitor C10, and a terminal matching resistor R9, where:

[0022] The CAN bus transceiver U6 is a TJA1050DRG chip, its TXD pin is connected to the CAN_TX end of the MCU, and its RXD pin is connected to the CAN_RX end of the MCU; the VCC pin is connected to the 3.3V voltage and grounded through a decoupling capacitor C9; the SPLIT pin is grounded through a voltage stabilizing capacitor C10; the CANL and CANH pins are respectively connected to the low-level signal and high-level signal of the CAN bus through an external signal interface J1;

[0023] Both ends of the terminal matching resistor R9 are respectively connected between the CANH and CANL signals of the bus.

[0024] Further, the 2.4GHz radio frequency signal transmitting circuit includes a radio frequency signal control chip, resistors R10, R11, a power supply decoupling capacitor C11, and an indicator light LED1, where:

[0025] The radio frequency signal control chip is an RF112B chip, its OUT pin is connected to the transmitting antenna through a resistor R10; the LED pin is connected to the indicator light LED1 through a resistor R11; the D0 / D1 / D2 / D3 pins are sequentially connected to the IN1 / IN2 / IN3 / IN4 of the MCU, for receiving GPIO level signals from the MCU;

[0026] The power decoupling capacitor C11 is connected between the 3.3V power supply and the ground to stabilize the power supply of the transmitting antenna.

[0027] Furthermore, a 2.4GHz radio frequency signal receiving circuit and peripheral circuits are provided inside the intelligent helmet active warning system.

[0028] Furthermore, the 2.4GHz radio frequency signal receiving circuit includes a radio frequency receiving chip U3, inductors L2 and L3, a transient suppression diode D2, decoupling capacitors C13 / C15, a filtering capacitor C18, and a resistor R12, where:

[0029] The ANT pin of the radio frequency receiving chip U3 is connected to the high-frequency signal input end of the receiving antenna through a matching circuit composed of a decoupling capacitor C13, inductors L2 and L3; the RFVDD pin is grounded through a filtering capacitor C18 and a decoupling capacitor C15 respectively; the Pb5 pin is left floating; the Pb2, Pb3, and Pb4 pins are output pins and are respectively connected to the downstream processing circuit; the Pb1, CTH, CAGC, RO2, and RO1 pins are respectively connected to the peripheral circuits; the Pb0, SHUT, and DO pins are grounded.

[0030] Furthermore, the peripheral circuit includes a crystal oscillator U2, capacitors C12 / C14 / C16 / C17, a switch SW1, resistors R12, R13, R14, and R15, and an indicator light LED2, where

[0031] The 1st port of the crystal oscillator U2 is connected to the RO2 pin of the radio frequency receiving chip U3 and is grounded through a capacitor C14; the 3rd port is connected to the RO1 pin of the radio frequency chip U1 and is grounded through a capacitor C12; the 2nd port and the 4th port are grounded; one end of the capacitor C14 is connected to the RO2 pin of the radio frequency receiving chip U3, and the other end is grounded; one end of the capacitor C16 is connected to the CAGC pin of the radio frequency receiving chip U3, and the other end is grounded; one end of the capacitor C17 is connected to the CTH pin of the radio frequency receiving chip U3, and the other end is grounded; one end of the switch SW1 is connected to the Pb1 pin of the radio frequency receiving chip U3 and is grounded through a resistor R15, and the other end is connected to the system voltage VCC through a resistor R13; the anode of the indicator light LED2 is grounded through resistors R14 and R15 in sequence, and the cathode is grounded.

[0032] The present utility model has the following beneficial effects:

[0033] 1) Compared with the existing two-wheeled vehicles equipped with millimeter-wave radars, the present utility model increases the presentation objects of radar warning information. It not only displays on the instrument to prompt the driver, but also warns other traffic participants; furthermore, the present utility model increases the light emission positions on the helmet, solving the problem that motor vehicles cannot detect warning signals in blind spots of vision and during night driving.

[0034] 2) Compared with the existing radar warning flashing lights, the electromagnetic wave working frequency band used in the present utility model is 77 GHz, which has the characteristics of high-resolution imaging, high-precision distance / speed detection, and high penetration. The present utility model can more accurately perceive dangerous situations and overcome the influence of weather such as rain, snow, and fog at the same time. At the same time, the existing radar warning flashing lights do not need to be calibrated and are installed by the user himself, and the detection accuracy is relatively low. While the radar of the present utility model is fixed on the vehicle body and has undergone radar calibration and standardization before leaving the factory, greatly improving the accuracy and recall rate of radar detection results;

[0035] 3) Compared with the existing two-wheeler safety helmets, the present utility model displays the radar warning information on the helmet in real time to remind others to keep a safe distance, greatly increasing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural diagram of a two-wheeler riding anti-collision warning system based on millimeter-wave radar perception of the present utility model.

[0037] Figure 2 It is a radar CAN signal transceiver circuit diagram of an embodiment of the present utility model.

[0038] Figure 3 It is a vehicle-mounted CAN signal transceiver circuit diagram of an embodiment of the present utility model.

[0039] Figure 4 It is a 2.4 GHz radio frequency signal transmission circuit diagram of an embodiment of the present utility model.

[0040] Figure 5 It is a 2.4 GHz radio frequency signal reception circuit diagram of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The following describes the specific embodiments of the present utility model to facilitate those skilled in the art of the present technology to understand the present utility model. However, it should be clear that the present utility model is not limited to the scope of the specific embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present utility model defined and determined by the appended claims, these changes are obvious, and all utility models created using the concept of the present utility model are within the scope of protection.

[0042] A two-wheeler riding anti-collision warning system based on millimeter-wave radar perception, as Figure 1 shown, includes a warning information collection module, an information processing module, and a warning information broadcasting module;

[0043] The warning information collection module includes a traditional warning information collection unit and a millimeter-wave radar warning information collection unit;

[0044] The information processing module includes an active warning system for two-wheel vehicles and an active warning system for smart helmets;

[0045] The warning information broadcasting module includes a two-wheel vehicle instrument panel, two-wheel vehicle turn signals and brake lights, two-wheel vehicle strobe lights, helmet outline lights, helmet turn signals and brake lights, and helmet strobe lights;

[0046] Among them, the active warning system for two-wheel vehicles is respectively connected to the traditional warning information collection unit, the millimeter-wave radar warning information collection unit, and the active warning system for smart helmets, and outputs high and low level signals to the two-wheel vehicle instrument panel, two-wheel vehicle turn signals and brake lights, and two-wheel vehicle strobe lights; the active warning system for smart helmets outputs high and low level signals to the helmet outline lights, helmet turn signals and brake lights, and helmet strobe lights.

[0047] In this embodiment, the warning information collection module consists of a traditional warning information collection part and a millimeter-wave radar warning information collection part. The traditional warning information collection part mainly includes the left and right turn signals from the grip buttons and the brake lights of the brake grip; the millimeter-wave radar warning information collection part mainly includes the millimeter-wave radars at the head / tail of the two-wheel vehicle. The working frequency band of this radar is 77 GHz, which realizes BSD blind spot monitoring, LCA lane change assist, FCW / RCW forward and backward collision warning. The forward and backward warning distance reaches 90 meters, the left and right warning ranges cover two standard motor vehicle lanes, and the warning response delay reaches the millisecond level.

[0048] The signal flow of the active warning system for smart helmets is as Figure 1 shown, and the process description is as follows:

[0049] 1. The millimeter-wave radar will collect and process the warning information, and send it to the vehicle-mounted central control through the Figure 2 shown radar CAN signal transceiver module.

[0050] 2. Figure 3 The shown vehicle-mounted CAN signal transceiver module receives the warning information from the radar and sends it to the MCU in the vehicle-mounted central control;

[0051] 3. The MCU will control the Figure 4 shown 2.4GHz RF signal transmission module to send out corresponding RF signals according to the types of traditional warning information and radar warning information;

[0052] 4. Through the Figure 5 shown 2.4GHz RF signal receiving module, the helmet central control receives the warning type from the vehicle-mounted central control. The MCU of the helmet central control drives the helmet part in the warning information broadcasting module through high and low level signals according to the warning type.

[0053] Among them, the warning information broadcasting module consists of a part for warning two-wheeler drivers (including the two-wheeler instrument panel), and a part for warning other vehicles (including the two-wheeler turn signal, brake light, strobe light, as well as the helmet outline light, turn signal, brake light, strobe light), which is responsible for prompting two-wheeler drivers and other vehicles of the received millimeter-wave radar warning information and traditional warning information through lights.

[0054] Figure 2 shows the CAN signal transceiver circuit inside the millimeter-wave radar. In Figure 1 , this module is integrated inside the two-wheeler millimeter-wave radar, including power supply filtering, voltage distribution and stabilization, signal protection, and the main CAN transceiver module, specifically including:

[0055] Power supply filtering and voltage distribution:

[0056] C1 (22uF) and C2, C3, C4 (each 0.1uF): These capacitors are used for filtering to ensure the power supply stability of +5V_CAN and VCC3V3. C1 is connected between the +5V_CAN power supply and ground, and C2, C3, and C4 are respectively connected between the VCC3V3 power supply and ground.

[0057] R1 (0Ω): Connected between the VCC3V3 power supply and the terminal voltage VSPLIT, used to avoid current loops during cross-connection and reduce interference.

[0058] CAN transceiver module (U1):

[0059] U1 (TJA1043TK): The main CAN transceiver, used to send and receive CAN signals.

[0060] Pin 1 (TXD): Connected to the RXCAN pin of the MCU, used to send the demodulated CAN data to the MCU.

[0061] Pin 2 (GND): Grounded.

[0062] Pin 3 (VCC): Connected to the 5V power supply for CAN signal transmission.

[0063] Pin 4 (RXD): Connected to the TXCAN pin of the MCU, used to receive the CAN data to be sent.

[0064] Pin 5 (VIO): Connected to the VCC3V3 power supply, used for chip power supply.

[0065] Pin 6 (EN): Connected to the CAN_EN signal, controlling the enabling of the CAN transceiver.

[0066] Pin 7 (INH): Connected to the CAN_EN signal, controls the enabling of the power module for the CAN signal transmission section (VIO).

[0067] Pin 8 (ERR): Connected to the CAN_ERR signal, used to indicate CAN transceiver faults.

[0068] Pin 9 (Wake): Wake-up input port, a high-level input signal can wake up the CAN transceiver chip.

[0069] Pin 10 (Vbat): Battery voltage supply port, used to compare with the input voltages of other ports to select the operating mode of the chip.

[0070] Pin 11 (Split): Connected to the terminal voltage VSPLIT voltage distribution point.

[0071] Pin 13 (CANH) and Pin 12 (CANL): High and low level signals of the CAN bus, connected to L1 for differential signal output.

[0072] Pin 14 (STB): Receives the CAN_STB signal from the MCU, used to control the CAN transceiver to enter the low-power mode.

[0073] Signal protection and anti-interference:

[0074] L1 (common mode choke, ACT45B-510-2P-TL003): Used to enhance the anti-interference ability of the signal, reduce common mode noise, connected to the CANH and CANL signal lines.

[0075] D1 (AQ24CANFD-02HTG): TVS diode, used to protect the CAN signal lines from voltage transients, connected to the CANH and CANL signal lines.

[0076] C5, C6, C8 (each 100 pF): Used for signal filtering, reduce high-frequency noise, respectively connected between VSPLIT and ground.

[0077] R3, R4, R7 (each 1.3 kΩ): Used for signal attenuation and stabilization, respectively connected between VSPLIT and the CANH and CANL signal lines.

[0078] R2 (10 kΩ): Connected between VSPLIT and the CAN_STB signal.

[0079] R5 (1 kΩ) and R6 (10 kΩ): Respectively connected between the +12V power supply and VSPLIT, used for voltage distribution and stabilization.

[0080] C7 (0.1uF): Connected between Vbat and ground for decoupling and stabilizing the battery supply voltage.

[0081] Through the collaborative work of the above parts, this circuit can transmit the warning data sent by the radar module MCU through ports CANH and CANL as differential voltage signals conforming to the standard CAN2.0 specification, ensuring the reliability and stability of the entire system.

[0082] Figure 3 Shows the in-vehicle CAN signal transceiver circuit inside the two-wheeler active warning system. Figure 1 In this, this module is integrated inside the two-wheeler active warning system. Among them, TJA1050DRG is used as the CAN bus transceiver, responsible for the physical layer transmission and reception of CAN bus signals. This circuit converts the differential signals (CANH and CANL) of the CAN bus into digital encoded signals for communication with the MCU, and communicates through pins PB8 and PB9, identified as CAN_RX and CAN_TX respectively.

[0083] Signal interface:

[0084] J1 (2x1 Header): Used as the external interface for CAN signals, connecting CANH and CANL respectively.

[0085] CAN transceiver module (U6): U6 (TJA1050DRG): The main CAN transceiver, used for sending and receiving CAN signals.

[0086] Pin 1 (TXD): Connected to pin PB9 (CAN_TX) of the MCU, used to send the demodulated CAN data to the MCU.

[0087] Pin 2 (GND) and pin 4 (GND): Grounded to provide a stable reference voltage.

[0088] Pin 3 (VCC): Connected to the 3.3V power supply, decoupled through capacitor C9 (100nF) to ensure the stability of the power supply.

[0089] Pin 4 (RXD): Connected to pin PB8 (CAN_RX) of the MCU, used to receive the data sent by the MCU that needs to be converted into CAN signals.

[0090] Pin 5 (SPLIT): Grounded through a capacitor, used to stabilize the differential voltage signals transmitted by CANH and CANL, reducing common-mode noise.

[0091] Pin 6 (CANL) and pin 7 (CANH): Connected to the low-level and high-level signals of the CAN bus respectively for differential signal transmission.

[0092] Pin 8 (STB): Grounded, controls the standby mode status of the CAN signal transceiver chip.

[0093] Power supply filtering and decoupling:

[0094] C9 (100 nF): Connected between the 3.3 V power supply and ground, used for power supply decoupling to ensure a stable power supply for the TJA1050DRG during operation.

[0095] C10 (100 nF): Stabilizes the differential voltage signal and reduces common-mode noise.

[0096] Termination resistor:

[0097] R9 (120 Ω): Serves as a termination matching resistor, connected between CANH and CANL, ensures the signal integrity of the CAN bus, prevents signal reflection, and improves the reliability of communication.

[0098] Through the collaborative work of the above parts, this circuit can reliably transmit the data of the radar warning system through the standard CAN2.0 protocol, ensuring the reliability and stability of the system.

[0099] Figure 4 It is the circuit diagram of the 2.4 GHz radio frequency signal transmitter. In Figure 1 it, this module is integrated inside the active warning system of the two-wheeler. The differential CAN signal from the radar and the high and low level signals from the key throttle grip are processed by the MCU and input into this circuit through the four-way GPIO signals IN1, IN2, IN3, and IN4, and the 2.4 GHz signal carrying information is transmitted through the antenna.

[0100] 1. Radio frequency signal control chip (RF112B, EV1527)

[0101] Pin 1 (GND): Connected to ground (GND).

[0102] Pin 2 (OUT): Connected to the antenna, outputs the radio frequency signal to be transmitted to the antenna.

[0103] Pin 3 (LED): Connected to resistor R11 (4.7 kΩ), and then connected to LED1, used to indicate the working status of the chip.

[0104] Pin 4 (D0): Connected to IN1, receives the GPIO level signal from the MCU.

[0105] Pin 5 (D1): Connected to IN2, receives the GPIO level signal from the MCU.

[0106] Pin 6 (D2): Connected to IN3, receives the GPIO level signal from the MCU.

[0107] Pin 7 (D3): Connected to IN4, receiving the GPIO level signal from the MCU.

[0108] Pin 8 (VCC): Connected to the 3.3V voltage, the power supply pin of the chip.

[0109] 2. Debugging resistor (R10)

[0110] R10 (0Ω): Connected to pin 1 (GND) of RF112B and ground (GND), used for convenient conduction or disconnection during debugging.

[0111] 3. Power supply decoupling capacitor (C11)

[0112] C11 (100nF): Connected to the 3.3V power supply and ground (GND), the power supply decoupling capacitor, used to stabilize the antenna power supply.

[0113] 4. Antenna

[0114] 2.4GHz_RF: Connected to the power supply and the OUT pin of the RF112B chip, transmitting the radio frequency signal.

[0115] Figure 5 It is the circuit diagram for receiving 2.4GHz radio frequency signals. In Figure 1 This module is integrated inside the intelligent helmet active warning system. The 2.4GHz signal from the two-wheeler active warning system is input into the radio frequency signal receiving chip, and the digital encoded signals OUT1, OUT2, OUT3 carrying information are output through the GPIO ports. This circuit receives the 2.4GHz radio frequency signal through the radio frequency front-end part and demodulates it through the QA480 chip to extract the effective signal. Other peripheral circuits provide clock signals, stable power supplies, control, and indication functions. The design of the entire circuit aims to stably receive the radio frequency signal and demodulate it into a usable data signal for subsequent signal processing.

[0116] In Figure 5 This includes a radio frequency front-end part and a peripheral circuit part, where:

[0117] 1. Radio frequency front-end part

[0118] Antenna (2.4GHz_RF): Receives the 2.4GHz radio frequency signal and is connected to the matching circuit.

[0119] L2 (27nH): Connected to the antenna (2.4GHz_RF), serving as a radio frequency signal matching inductor for tuning the radio frequency signal.

[0120] L3 (39nH): Connected to the antenna (2.4GHz_RF), serving as a radio frequency signal matching inductor for tuning the radio frequency signal.

[0121] D1(SMF6.0A): Transient suppression diode, connected to the antenna (2.4GHz_RF) and ground (GND), used to protect the circuit from electrostatic discharge (ESD) and other overvoltage transients.

[0122] C13(1.8pF): Connected to the antenna (2.4GHz_RF) and pin 2 (ANT) of the RF receiving chip QA480 for decoupling.

[0123] C18(100nF): Connected to pin 4 (VDD) of the RF receiving chip QA480 and ground (GND) to filter high-frequency noise on the power supply and ensure a stable power supply.

[0124] C15(1uF): Connected to pin 3 (RFVDD) of the RF receiving chip QA480 and ground (GND) for decoupling.

[0125] 2. RF receiving chip part (QA480).

[0126] Pin 1 (RFGND): RF ground, connected to ground (GND).

[0127] Pin 2 (ANT): High-frequency signal input pin for the wireless antenna, connected to capacitor C13 and to the antenna through a matching circuit.

[0128] Pin 3 (RFVDD): Power supply pin for the RF part, connected to capacitor C18 and capacitor C15.

[0129] Pin 4 (VDD): MCU power supply pin, connected to the 3.3V power supply.

[0130] Pin 5 (Pb5): Data output pin, floating.

[0131] Pins 6 - 8 (Pb2, Pb3, Pb4): Data output pins, connected to the corresponding downstream processing circuit.

[0132] Pin 9 (Pb1): External button input pin, used to control the working state of the chip, connected to the power supply VCC through a switch and a voltage-dividing resistor.

[0133] Pin 10 (Pb0): RF signal input pin, receives the demodulated RF signal output by DO, and controls the output of GPIO level signals of OUT1, OUT2, and OUT3 through U1 respectively.

[0134] Pin 11 (SHUT): Power-saving mode control pin, sharing the same ground (GND) with the crystal oscillator U2.

[0135] Pin 12 (DO): RF data output pin, which outputs the demodulated 2.4 GHz RF signal.

[0136] Pin 13 (CTH): Voltage stabilization pin, which is grounded through capacitor C17 (470 nF).

[0137] Pin 14 (CAGC): Automatic control voltage stabilization capacitor pin, which is grounded through capacitor C16 (4.7 uF).

[0138] Pin 15 (RO2): Crystal oscillator pin, which is connected to pin 1 of the external crystal oscillator U2 to obtain the clock signal.

[0139] Pin 16 (RO1): Crystal oscillator pin, which is connected to pin 3 of the external crystal oscillator U2 to obtain the clock signal.

[0140] 3. Other peripheral circuit parts

[0141] U2 (13.52313 MHz): Crystal oscillator, which is connected to pin 15 (RO2) and pin 16 (RO1) of QA480 to provide the clock signal for the MCU.

[0142] C12 (22 pF): Connected to the crystal oscillator, which is used to stabilize the clock signal output from the crystal oscillator to the MCU.

[0143] C14 (22 pF): Connected to the crystal oscillator, which is used to stabilize the clock signal output from the crystal oscillator to the MCU.

[0144] C17 (470 nF): Connected to pin 14 of the MCU, which is used to control the internal voltage of the MCU to maintain stability.

[0145] C16 (4.7 uF): Connected to pin 13 of the MCU, which is used to control the internal voltage of the MCU to maintain stability.

[0146] SW1 (TS-1092S-B3D2-G): Switch, which is connected to pin 9 (Pb1) of QA480 and the power supply, and is used to control the working state of the circuit.

[0147] R12 (22 Ω): Connected to pin 3 (RFVDD) of QA480 and the 3.3 V power supply, which is used for current limiting.

[0148] R14 (3 kΩ), R15 (3 kΩ), R13 (510 Ω): Voltage dividing resistors, which are respectively connected to LED1 and the power supply (VCC) and are used for voltage distribution.

[0149] LED2 (NCD0805R1): Indicator light, which is connected to the power supply and ground (GND) through the voltage dividing resistor and is used to display the working state of the circuit.

[0150] Specific embodiments are used in the present utility model to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

[0151] Those of ordinary skill in the art will realize that the embodiments described herein are for helping the reader understand the principles of the present utility model, and it should be understood that the protection scope of the present utility model is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific deformations and combinations that do not depart from the essence of the present utility model based on the technical revelations disclosed in the present utility model, and these deformations and combinations are still within the protection scope of the present utility model.

Claims

1. A two-wheeled vehicle anti-collision warning system based on millimeter-wave radar perception, characterized in that: It includes a warning information collection module, an information processing module and a warning information broadcasting module; The warning information collection module includes a traditional warning information collection unit and a millimeter wave radar warning information collection unit; The information processing module includes an active warning system for two-wheeled vehicles and an active warning system for smart helmets; The warning information broadcast module includes a two-wheeled vehicle instrument panel, a two-wheeled vehicle turn signal and brake light, a two-wheeled vehicle flashing light, a helmet clearance light, a helmet turn signal and brake light, and a helmet flashing light; Among them, the two-wheeled vehicle active warning system is respectively connected to the traditional warning information collection unit, the millimeter wave radar warning information collection unit and the intelligent helmet active warning system, and outputs high and low level signals to the two-wheeled vehicle instrument panel, the two-wheeled vehicle turn lights and brake lights, and the two-wheeled vehicle flashing lights; the intelligent helmet active warning system outputs high and low level signals to the helmet marker lights, helmet turn lights and brake lights, and helmet flashing lights.

2. The two-wheeled vehicle anti-collision warning system based on millimeter-wave radar perception according to claim 1 is characterized in that: The millimeter-wave radar early warning information collection circuit is a CAN signal transceiver circuit inside the millimeter-wave radar, including a CAN transceiver module U1, capacitors C1, C2, C3, C4, C5, C6 and C8, resistors R1, R2, R3, R4, R5, R6 and R7, a common-mode choke L1 and a transient diode D1, wherein: The CAN transceiver module U1 is a TJA1043TK chip, whose TXD pin is connected to the RXCAN pin of the MCU for sending the demodulated CAN data; the VCC pin is connected to the 5V power supply for providing a reference voltage for sending CAN signals; the RXD pin is connected to the TXCAN pin of the MCU; the CAN_EN signal from the MCU and the 3.3V voltage after the voltage reduction by the resistor R8 are connected to the EN pin to enable the CAN transceiver; the INH pin is connected to the PW_EN_CAN signal to control the CAN signal sending part of the power module to enable; the ERR pin is connected to the M The CAN_ERR signal of CU is used to indicate a CAN transceiver failure; the Wake pin is a wake-up input port, connected to the +12v voltage through a resistor R6; the Vbat pin is a battery voltage power supply port, connected to the +12v voltage through a resistor R6 and grounded through a capacitor C7; the Split pin is connected to the terminal voltage VSPLIT voltage distribution point; the CANH pin and the CANL pin are connected to the common mode choke L1 and connected to the CANH and CANL signal lines through L1 for differential signal output; the STB pin receives the CAN_STB signal of the MCU and is grounded through a resistor R2; Capacitor C1 is connected between the +5V_CAN power supply and ground, and C2, C3, and C4 are connected between the system voltage VCC3V3 and ground respectively; Resistor R1 is connected between the system voltage VCC3V3 and the terminal voltage VSPLIT to avoid a current loop during crossover; Transient diode D1 is a three-terminal transient voltage suppression diode, whose control terminal is connected to the terminal voltage VSPLIT through capacitor C6 and resistor R4 in sequence, and its two output terminals are connected to the CANH and CANL signal lines respectively; One end of the resistor R3 is connected to the terminal voltage VSPLIT through the resistor R4, and the other end is connected to the CANH signal line and grounded through the capacitor C5; one end of the resistor R7 is connected to the terminal voltage VSPLIT through the resistor R4, and the other end is connected to the CANL signal line and grounded through the capacitor C8.

3. The two-wheeled vehicle anti-collision warning system based on millimeter-wave radar perception according to claim 1 is characterized in that: The two-wheeled vehicle active early warning system comprises: The on-board CAN signal transceiver circuit is responsible for the physical layer transmission and reception of CAN bus signals; The 2.4GHz radio frequency signal transmitting circuit is used to transmit a 2.4GHz radio frequency signal carrying early warning information.

4. The two-wheeled vehicle anti-collision warning system based on millimeter-wave radar perception according to claim 3 is characterized in that: The vehicle-mounted CAN signal transceiver circuit comprises: CAN bus transceiver U6, external signal interface J1, decoupling capacitor C9, voltage stabilizing capacitor C10 and terminal matching resistor R9, where: The CAN bus transceiver U6 is a TJA1050DRG chip, whose TXD pin is connected to the CAN_TX end of the MCU, and the RXD pin is connected to the CAN_RX end of the MCU; the VCC pin is connected to the 3.3V voltage and grounded through the decoupling capacitor C9; the SPLIT pin is grounded through the voltage stabilizing capacitor C10; the CANL and CANH pins are connected to the low-level signal and high-level signal of the CAN bus respectively through the external signal interface J1; The two ends of the terminal matching resistor R9 are respectively connected between the bus CANH and CANL signals.

5. The two-wheeled vehicle anti-collision warning system based on millimeter-wave radar perception according to claim 3 is characterized in that: The 2.4 GHz radio frequency signal transmission circuit includes a radio frequency signal control chip, resistors R10, R11, a power supply decoupling capacitor C11 and an indicator light LED1, wherein: The RF signal control chip is an RF112B chip, whose OUT pin is connected to the transmitting antenna through a resistor R10; the LED pin is connected to the indicator LED1 through a resistor R11; the D0 / D1 / D2 / D3 pins are connected to the IN1 / IN2 / IN3 / IN4 of the MCU in sequence, for receiving GPIO level signals from the MCU; The power decoupling capacitor C11 is connected between the 3.3V power supply and the ground to stabilize the power supply of the transmitting antenna.

6. The two-wheeled vehicle anti-collision warning system based on millimeter-wave radar perception according to claim 1 is characterized in that: The smart helmet active warning system is provided with a 2.4 GHz radio frequency signal receiving circuit and peripheral circuits.

7. The two-wheeled vehicle anti-collision warning system based on millimeter-wave radar perception according to claim 6 is characterized in that: The 2.4 GHz radio frequency signal receiving circuit includes a radio frequency receiving chip U3, inductors L2 and L3, a transient suppression diode D2, decoupling capacitors C13 / C15, a filter capacitor C18 and a resistor R12, wherein: The ANT pin of the RF receiving chip U3 is connected to the high-frequency signal input end of the receiving antenna through a matching circuit composed of a decoupling capacitor C13, inductors L2 and L3; the RFVDD pin is grounded through filter capacitor C18 and decoupling capacitor C15 respectively; the Pb5 pin is left floating; the Pb2, Pb3 and Pb4 pins are output pins, respectively connected to downstream processing circuits; the Pb1, CTH, CAGC, RO2, RO1 pins are respectively connected to peripheral circuits; the Pb0, SHUT, DO pins are grounded.

8. The two-wheeled vehicle anti-collision warning system based on millimeter-wave radar perception according to claim 7 is characterized in that: The peripheral circuit includes a crystal oscillator U2, capacitors C12 / C14 / C16 / C17, a switch SW1, resistors R12, R13, R14 and R15, and an indicator LED2, wherein: Port No. 1 of the crystal oscillator U2 is connected to the RO2 pin of the RF receiving chip U3 and is grounded through capacitor C14; port No. 3 is connected to the RO1 pin of the RF chip U1 and is grounded through capacitor C12; port No. 2 and port No. 4 are grounded; one end of capacitor C14 is connected to the RO2 pin of the RF receiving chip U3, and the other end is grounded; one end of capacitor C16 is connected to the CAGC pin of the RF receiving chip U3, and the other end is grounded; one end of capacitor C17 is connected to the CTH pin of the RF receiving chip U3 and the other end is grounded; one end of the switch SW1 is connected to the Pb1 pin of the RF receiving chip U3 and is grounded through resistor R15, and the other end is connected to the system voltage VCC through resistor R13; the anode of indicator light LED2 is grounded through resistors R14 and R15 in sequence, and the cathode is grounded.

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