Front reading lamp integrated with millimeter wave radar

Abstract

The utility model discloses a front reading lamp integrated with a millimeter wave radar. The front reading lamp comprises a temperature and humidity sensor module, an MCU module, a first communication module, a second communication module, a power management module, a millimeter wave radar module, an LDO module, an LED drive circuit, an LED lamp set and a display screen. According to the front reading lamp integrated with the millimeter wave radar, the reading lamp can be automatically turned on when a person gets on the vehicle, the reading lamp can be automatically turned off after the person gets off the vehicle, and meanwhile in-vehicle environment information and person heart rate information can be monitored in real time.

Description

Technical Field

[0001] The utility model relates to a front reading lamp integrated with a millimeter wave radar. Background Art

[0002] At present, the commonly used front reading lights on vehicles are controlled by a button switch, the power supply is connected to the control circuit, the control circuit is connected to the lamp beads, and the light is lit when a person presses the button. The commonly used front reading lights on vehicles can only be lit passively by humans, which is not smart enough. The lights cannot be automatically lit when people enter or automatically turned off when people leave. After the reading lights are lit, there is a situation where people forget to turn them off, which will consume the power of the vehicle battery. The reading lights can only provide simple lighting functions and cannot provide other functions. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a front reading light with an integrated millimeter-wave radar, which can automatically light up when a person gets on the vehicle and automatically turn off when the person gets off the vehicle, while also providing real-time monitoring of the vehicle's interior environment information and the heart rate information of the occupants.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A front reading light with integrated millimeter wave radar, comprising a temperature and humidity sensor module, an MCU module, a first communication module, a second communication module, a power management module, a millimeter wave radar module, an LDO module, an LED drive circuit, an LED light group and a display screen;

[0006] The output end of the temperature and humidity sensor module is connected to the MCU module, and the display screen is connected to the MCU module;

[0007] The input end of the power management module is connected to the automobile power supply system, the output end of the power management module is connected to the millimeter wave radar module, the input end of the LDO module is connected to the vehicle body BCM, and the first output end of the LDO module is connected to the MCU module;

[0008] The millimeter wave radar module is connected to the automobile communication system through the first communication module, the MCU module is connected to the automobile communication system through the second communication module, and the millimeter wave radar module is connected to the MCU module;

[0009] The input end of the LED driving circuit is connected to the second output end of the LDO module, the output end of the LED driving circuit is connected to the LED lamp group, and the control end of the LED driving circuit is connected to the MCU module.

[0010] Furthermore, the first communication module is a CAN transceiver.

[0011] Furthermore, the second communication module is a CAN transceiver.

[0012] Furthermore, the LDO module includes a power input processing module and a power conversion chip, the input end of the power input processing module is connected to the automobile power supply system, the output end of the power input processing module is respectively connected to the LED drive circuit and the input end of the power conversion chip, and the output end of the power conversion chip is connected to the MCU module.

[0013] Furthermore, it also includes an external switch button, which is connected to the control end of the LED drive circuit.

[0014] By adopting the above technical solution, in addition to being able to manually light up the reading light, the utility model can also sense whether there are people getting on or off the bus, and automatically light up the reading light when someone gets on. If the millimeter wave radar module detects that someone is getting off the bus, the reading light can be automatically turned off. In addition to providing lighting functions, the utility model can detect the heart rate of passengers and provide information on the temperature and humidity of the vehicle environment, making it more functional and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation structure of a front reading light with integrated millimeter-wave radar according to the utility model;

[0016] Figure 2 This is a principle block diagram of a front reading light with integrated millimeter-wave radar according to the utility model;

[0017] Figure 3 This is a circuit schematic diagram of the MCU module of the utility model;

[0018] Figure 4 This is a circuit schematic diagram of the power management module of the utility model;

[0019] Figure 5 This is a circuit schematic diagram of the LDO module, LED drive circuit, and LED lamp group of the utility model;

[0020] Figure 6 This is a circuit schematic diagram of the first communication module and the second communication module of the utility model. DETAILED DESCRIPTION

[0021] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0022] like Figure 1As shown, this embodiment provides a front reading light with integrated millimeter wave radar, including a temperature and humidity sensor module, an MCU module, a first communication module, a second communication module, a power management module, a millimeter wave radar module, an LDO module, an LED driving circuit, an LED light group and a display screen 3. Figure 2 As shown, the above circuit modules are all arranged on the lamp board 2, the lamp board 2 is placed in the housing 1, and the housing 1 is installed in the front ceiling of the car. The housing 1 is also provided with an interface terminal 4, which is electrically connected to the lamp board 2 and is used to connect the wiring harness 5, which is connected to the car power supply system and the car communication system.

[0023] like Figure 1 As shown, the output end of the temperature and humidity sensor module of this embodiment is connected to the MCU module, and the display screen is connected to the MCU module. The display screen 3 of this embodiment adopts an LCD display screen. The LCD screen 4 is connected to the light board through a connector to receive the in-vehicle environment information from the MCU. The temperature and humidity sensor can detect the temperature and humidity information in the vehicle, and transmit it to the MCU module through CAN communication. The MCU module controls the LCD display screen to display the humidity and temperature information.

[0024] like Figure 1 As shown, the input end of the power management module of this embodiment is connected to the automobile power supply system, and the output end of the power management module is connected to the millimeter wave radar module. Figure 4 As shown, the power management module uses a power management chip U1, model LP87524JRNFRQ1. The power management chip U1 converts the 12V power provided by the car's power supply system into a 3.3V voltage for use by the millimeter wave radar module.

[0025] like Figure 1 As shown, the input end of the LDO module of this embodiment is connected to the vehicle body BCM, and the first output end of the LDO module is connected to the MCU module. Figure 5 As shown, the LDO module includes a power input processing module and a power conversion chip. The input end of the power input processing module is connected to the car power supply system, and the output end of the power input processing module is respectively connected to the LED drive circuit and the input end of the power conversion chip, and the output end of the power conversion chip is connected to the MCU module. The power input processing module uses TVS tube LT1 for anti-static and surge protection, and diode LD7 for anti-reverse connection protection. The output of diode LD7 is connected to the LED drive circuit in one way and to the power conversion chip U20 in the other way. The power conversion chip U20 converts the 12V power provided by the car power supply system into a 5V voltage for use by the MCU. Figure 1As shown, the LED light group includes two LED light strings on the left and right, LED1 and LED3 are the left light string, LED2 and LED4 are the right light string. The LED driving circuit includes two left and right paths, each path is composed of a triode and a MOS tube. The MCU module controls the D and S poles of the MOS tube to conduct, so that the LED light string is grounded, forming a loop, and the LED light string is lit.

[0026] like Figure 1 As shown, the millimeter wave radar module of this embodiment is connected to the automobile communication system through the first communication module, the MCU module is connected to the automobile communication system through the second communication module, and the millimeter wave radar module is connected to the MCU module. The model of the millimeter wave radar module of this embodiment is XA6843ARBGALP. Figure 3 As shown, the model of the MCU module in this embodiment is FS32K144HAT0MLHT. Figure 6 As shown, the first communication module of this embodiment is CAN transceiver U12, and the second communication module is CAN transceiver U17. Through CAN communication, the vehicle door opening signal, vehicle start signal, and ignition off signal can be transmitted to the MCU module. The MCU notifies the millimeter wave radar module to start working and detect whether there are people getting on or off the vehicle, thereby automatically controlling the LED light group to light up and turn off without pressing the switch. In addition, the millimeter wave radar module detects the heart rate of the people in the car and transmits it to the MCU module. The MCU module controls the LCD display to display the heart rate information.

[0027] like Figure 1 As shown, the front reading light with integrated millimeter-wave radar in this embodiment also includes an external switch button, which is connected to the control end of the LED drive circuit to facilitate people in the car to manually turn on or off the reading light.

[0028] The working principle of the front reading lamp with integrated millimeter wave radar in this embodiment is as follows:

[0029] After the millimeter-wave radar module detects that someone is getting on the bus, it sends the location information to the MCU module, which then sends a light-on signal to light up the reading light. If the person gets on the bus from the left, the left LED string lights up, and if the person gets on the bus from the right, the right LED string lights up. After the MCU module receives the vehicle start signal, it turns off the reading light after a period of time. If necessary, the person in the car can manually turn on the reading light. If the millimeter-wave radar module detects that someone is getting off the bus, the reading light can be automatically turned off. The millimeter-wave radar module can also detect the heart rate information of the person in the car. The specific algorithm uses the mature radar sensor non-contact heartbeat monitoring algorithm in the prior art, which is specifically: pre-processing the radar echo signal, performing a rough human body positioning, eliminating static interference, extracting the phase signal of the human body positioning position (i.e., chest vibration signal), performing phase differentiation, and then removing pulse noise, and finally outputting the heartbeat signal through a bandpass filter. After the heartbeat signal is transmitted to the MCU module via the millimeter-wave radar module, the heart rate information is displayed on the LCD display.

[0030] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A front reading light integrated with millimeter wave radar, characterized in that: It includes a temperature and humidity sensor module, an MCU module, a first communication module, a second communication module, a power management module, a millimeter wave radar module, an LDO module, an LED drive circuit, an LED light group and a display screen; The output end of the temperature and humidity sensor module is connected to the MCU module, and the display screen is connected to the MCU module; The input end of the power management module is connected to the automobile power supply system, the output end of the power management module is connected to the millimeter wave radar module, the input end of the LDO module is connected to the vehicle body BCM, and the first output end of the LDO module is connected to the MCU module; The millimeter wave radar module is connected to the automobile communication system through the first communication module, the MCU module is connected to the automobile communication system through the second communication module, and the millimeter wave radar module is connected to the MCU module; The input end of the LED driving circuit is connected to the second output end of the LDO module, the output end of the LED driving circuit is connected to the LED lamp group, and the control end of the LED driving circuit is connected to the MCU module.

2. The front reading lamp with integrated millimeter wave radar according to claim 1, characterized in that: The first communication module is a CAN transceiver.

3. The front reading lamp with integrated millimeter wave radar according to claim 1, characterized in that: The second communication module is a CAN transceiver.

4. The front reading lamp with integrated millimeter wave radar according to claim 1, characterized in that: The LDO module includes a power input processing module and a power conversion chip. The input end of the power input processing module is connected to the automobile power supply system, the output end of the power input processing module is respectively connected to the LED drive circuit and the input end of the power conversion chip, and the output end of the power conversion chip is connected to the MCU module.

5. The front reading lamp with integrated millimeter wave radar according to claim 1, characterized in that: It also includes an external switch button, which is connected to the control end of the LED drive circuit.

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