A vehicle interior light based on a millimeter wave radar sensor

Abstract

The utility model relates to a kind of vehicle indoor light based on millimeter wave radar sensor, including indoor light PCB board, radar PCB board, power management chip, communication module and control chip, LED lamp is equipped on indoor light PCB board, radar PCB board is equipped with millimeter wave radar sensor, LED lamp and millimeter wave radar sensor share power management chip, communication module and control chip;Indoor light PCB board and radar PCB board are staggered left and right arrangement, and indoor light PCB board and radar PCB board are connected by circuitry.This utility model uses millimeter wave radar to realize in-vehicle life detection technology, is little by bad weather and visual blind area influence, accuracy and reliability have obvious advantage, lower hardware cost, structural member and wire harness can be shared, internal electronic components can also be shared, function integration, shared communication module and control module, reduce electronic hardware cost.

Description

Technical Field

[0001] This utility model relates to the field of in-vehicle life detection technology, and in particular to a vehicle interior light based on a millimeter-wave radar sensor. Background Technology

[0002] With the development of automobiles and the increasing popularity of private cars, accidents caused by children being left in vehicles are frequent. Therefore, for the sake of protecting lives, in-vehicle life detection technology has received widespread attention. Currently, the most widely used in-vehicle life detection technologies are camera-based detection solutions and gravity sensor solutions. Many vehicles are already equipped with cameras to monitor driver fatigue; these cameras can also perform life detection, with almost no additional hardware cost, only increased software visual recognition development costs. Gravity sensor solutions use gravity sensors within the seats to determine whether occupants are wearing seatbelts, and simultaneously determine whether someone is inside the vehicle – a cost-effective method.

[0003] However, the visual recognition technology of cameras has the following drawbacks: First, most in-car cameras are installed on the driver's side A-pillar or dashboard. Although a few are placed in the center above the windshield, blind spots are still unavoidable. Second, even excluding blind spots, accuracy is significantly affected in low-light areas, or in rainy, snowy, or foggy weather. Gravity sensing solutions also carry the risk of false alarms. On the one hand, children are too small to reach the threshold for triggering the sensor alarm; on the other hand, luggage placed on the seat may also falsely trigger the alarm. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the above-mentioned technical problems, this utility model provides a vehicle interior light based on a millimeter-wave radar sensor.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a vehicle interior light based on a millimeter-wave radar sensor, including an interior light PCB board, a radar PCB board, a power management chip, a communication module, and a control chip. The interior light PCB board is equipped with an LED light, and the radar PCB board is equipped with a millimeter-wave radar sensor. The LED light and the millimeter-wave radar sensor share the power management chip, communication module, and control chip. The interior light PCB board and the radar PCB board are staggered left and right, and are connected by wiring. The outer surface of the interior light is relatively flat, suitable for integrating the millimeter-wave radar into the interior light. The millimeter-wave radar PCB board is relatively small, allowing it to be placed inside the interior light. Considering that the radar PCB board uses a 6-layer or 8-layer high-speed PCB board, and the interior light PCB board often uses a double-layer board, for cost considerations, the two PCB boards are not combined but separated.

[0006] The indoor light PCB board is equipped with a touch detection module and an LED light driver module.

[0007] Relatively speaking, the space for the front interior lights is relatively large, so as a preferred option, the vehicle interior lights are the vehicle front interior lights.

[0008] The radar PCB board is located to the right of the indoor light PCB board, and the indoor light PCB board and the radar PCB board are connected by pins.

[0009] It also includes a housing, in which the indoor light PCB board and the radar PCB board are both located.

[0010] The communication module is a CAN transceiver, and the control chip is a SOC chip.

[0011] The power management chip provides power to the LED lights, millimeter-wave radar sensor, communication module, and control chip; the communication module is used to communicate with the vehicle body to transmit alarm signals and control commands; the control chip is connected to the millimeter-wave radar sensor and LED lights to process radar detection data and control the switching of interior lights.

[0012] The beneficial effects of this utility model are as follows: This utility model provides a vehicle interior light based on a millimeter-wave radar sensor. It utilizes millimeter-wave radar to achieve in-vehicle life detection technology, which is less affected by adverse weather conditions and blind spots, offering significant advantages in accuracy and reliability, and is not limited by installation location. The millimeter-wave radar is integrated into the vehicle interior light, employing an integrated solution that reduces hardware costs. Structural components and wiring harnesses can be shared, as can internal electronic components. Furthermore, the millimeter-wave radar is small and has low power consumption, so it will not affect the interior light and does not require additional space. The integration of millimeter-wave radar hardware into the interior light also integrates its functions, sharing communication and control modules, further reducing electronic hardware costs. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a structural diagram of the vehicle interior light based on a millimeter-wave radar sensor according to this utility model.

[0015] Figure 2 This is an internal structural diagram of the vehicle interior light based on a millimeter-wave radar sensor, according to this utility model.

[0016] Figure 3 This is a system diagram of the vehicle interior light based on a millimeter-wave radar sensor according to this utility model.

[0017] Figure 4 This is a control flowchart of the vehicle interior lights based on a millimeter-wave radar sensor according to this utility model.

[0018] Figure 5 This is a schematic diagram of the driving module circuit for a vehicle interior light based on a millimeter-wave radar sensor, according to this utility model.

[0019] Figure 6 This is a circuit diagram of the touch module for a vehicle interior light based on a millimeter-wave radar sensor, according to this utility model.

[0020] In the diagram: 1. Indoor light PCB board, 2. Radar PCB board, 3. Housing. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0022] This utility model discloses a vehicle interior light based on a millimeter-wave radar sensor, comprising an interior light PCB board 1, a radar PCB board 2, a power management chip, a communication module, and a control chip. The interior light PCB board 1 is equipped with an LED light, and the radar PCB board 2 is equipped with a millimeter-wave radar sensor. The LED light and the millimeter-wave radar sensor share the power management chip, communication module, and control chip. Figure 3 As shown, the communication module is a CAN transceiver, and the control chip is a SOC chip.

[0023] The interior light PCB board 1 and the radar PCB board 2 are staggered left and right, and are connected by wiring. This utility model of a vehicle interior light based on a millimeter-wave radar sensor also includes a housing 3, within which both the interior light PCB board 1 and the radar PCB board 2 are located. Figure 1 The image shows the outer shell 3 of the indoor light, which is relatively flat and suitable for integrating millimeter-wave radar into the light. The millimeter-wave radar's PCB board is relatively small, allowing it to be placed inside the light. Considering that the radar PCB board 2 uses a 6-layer or 8-layer high-speed PCB board, and the indoor light PCB board 1 often uses a double-layer board, for cost reasons, the two PCB boards are not combined but separated, such as... Figure 2 As shown, the interior light PCB board 1 is placed to the left of the interior light, and the radar PCB board 2 is placed to the right of the interior light. Relatively speaking, the space for the front interior light is larger; therefore, it is preferred that the vehicle interior light be the front interior light. The radar PCB board 2 is positioned to the right of the interior light PCB board 1, as shown... Figure 2 The middle board 2 is the radar board, which is staggered on both sides. The indoor light PCB board 1 and the radar PCB board 2 are connected by pins.

[0024] The power management chip provides power to the LED lights, millimeter-wave radar sensor, communication module, and control chip; the communication module is used to communicate with the vehicle body to transmit alarm signals and control commands; the control chip is connected to the millimeter-wave radar sensor and LED lights to process radar detection data and control the switching of interior lights.

[0025] like Figure 3This is a system block diagram of a millimeter-wave radar integrated automotive lighting solution. The LED lights and the millimeter-wave radar sensor share a power management chip, CAN transceiver, and SOC chip. After the car is started, the millimeter-wave radar sensor begins to operate. At this time, the sensor identifies the driver's posture, blink count, eye closure time, head tilt angle, heart rate, and other characteristics to detect and warn of driver fatigue in real time. If driver fatigue is detected, the SOC chip sends the information to the CAN transceiver, which then transmits it to the vehicle body. The vehicle body then issues an alarm and takes appropriate braking measures to prevent accidents. Figure 3 The vehicle's power supply system (BCM) is used. When the driver regains consciousness, the alarm is deactivated. Even after the vehicle is turned off and locked, the millimeter-wave radar sensor continues to operate for a certain period. If the millimeter-wave radar sensor detects someone left behind, the same SOC chip sends the information to the CAN transceiver, which then transmits it to the vehicle body, triggering an alarm. If the vehicle is unlocked, the alarm is deactivated. If the owner does not take any action, the vehicle automatically opens the doors and windows to prevent accidents involving the occupants. The control process is as follows: Figure 4 As shown.

[0026] The indoor light PCB board 1 is equipped with a touch detection module and an LED light driver module, such as... Figure 5-6 This is the circuit schematic for the driver module and the touch module. The driver module includes transistors LQ1, LQ2, and LQ3, as well as surrounding resistors and capacitors. The touch module mainly includes chip U2 and surrounding resistors and capacitors. When a person's hand touches the surface of the interior light, the light turns on; touching the surface again turns it off. When a person moves away from the vehicle, the millimeter-wave radar sensor detects that no one is inside and also turns off the interior light. If someone is detected left behind, the interior light flashes to alert the owner and simultaneously sends an alarm signal.

[0027] The vehicle interior light based on a millimeter-wave radar sensor of this invention can be set to the following two working modes:

[0028] Interior light operating mode 1: When an occupant touches the interior light, the touch detection module detects the touch signal and sends it to the driver chip, turning on the light. When the interior light is on, it turns off when an occupant touches it.

[0029] Interior light operating mode two: When a person opens the car door or uses voice to turn on the lights, the vehicle body sends a CAN message to the interior lights. The CAN transceiver inside the interior lights receives the CAN message and converts it into a URAT signal that the SOC chip can recognize. Upon receiving this signal, the SOC also sends a signal to the headlight driver module to illuminate the headlights. When the car door is closed for a certain period or the lights are turned off via voice, the vehicle body sends different CAN messages to the interior lights to turn them off. Turning the interior lights on and off does not affect the normal operation of the radar.

[0030] This invention integrates millimeter-wave radar into an indoor light, employing a hardware integration solution that shares the housing 3 and wiring harness, reducing mold opening costs and hardware costs. The millimeter-wave radar hardware is integrated into the indoor light, while also integrating functions, sharing the communication module and control module, thus reducing electronic hardware costs. The millimeter-wave radar detects living organisms with minimal impact from adverse weather conditions and blind spots, exhibiting high accuracy and reliability.

[0031] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A vehicle interior light based on a millimeter-wave radar sensor, characterized in that: The system includes an indoor light PCB board (1), a radar PCB board (2), a power management chip, a communication module, and a control chip. The indoor light PCB board (1) is equipped with an LED light, and the radar PCB board (2) is equipped with a millimeter-wave radar sensor. The LED light and the millimeter-wave radar sensor share the power management chip, the communication module, and the control chip. The indoor light PCB board (1) and the radar PCB board (2) are staggered left and right, and the indoor light PCB board (1) and the radar PCB board (2) are connected by a circuit.

2. The vehicle interior light based on a millimeter-wave radar sensor as described in claim 1, characterized in that: The indoor lamp PCB board (1) is equipped with a touch detection module and an LED lamp driving module.

3. The vehicle interior light based on a millimeter-wave radar sensor as described in claim 1, characterized in that: The vehicle interior lights are the vehicle front interior lights.

4. The vehicle interior light based on a millimeter-wave radar sensor as described in claim 1, characterized in that: The radar PCB board (2) is located to the right of the indoor light PCB board (1), and the indoor light PCB board (1) and the radar PCB board (2) are connected by pins.

5. The vehicle interior light based on a millimeter-wave radar sensor as described in claim 1, characterized in that: It also includes a housing (3), in which the indoor lamp PCB board (1) and radar PCB board (2) are both located.

6. The vehicle interior light based on a millimeter-wave radar sensor as described in claim 1, characterized in that: The communication module is a CAN transceiver, and the control chip is a SOC chip.

7. The vehicle interior light based on a millimeter-wave radar sensor as described in claim 1, characterized in that: The power management chip provides power to the LED lights, millimeter-wave radar sensor, communication module, and control chip; the communication module is used to communicate with the vehicle body to transmit alarm signals and control commands; the control chip is connected to the millimeter-wave radar sensor and LED lights to process radar detection data and control the switching of interior lights.

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