CN111885769A

CN111885769A - Vehicle-mounted intelligent interaction system based on LED halo display

Info

Publication number: CN111885769A
Application number: CN202010602918.9A
Authority: CN
Inventors: 贺伟; 李林峰; 韩阳
Original assignee: Wuhan Haiwei Technology Co ltd
Current assignee: Wuhan Haiwei Technology Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-11-03

Abstract

The invention relates to a vehicle-mounted intelligent interaction system based on LED light ring display, which comprises a main control module, a Flash memory, a temperature sensor, a CAN data analysis module and an LED driving module, wherein the CAN data analysis module is used for acquiring vehicle state information and user behavior information, the main control module is used for taking corresponding animation data from the Flash memory according to the vehicle state information and the user behavior information, controlling the LED driving module to light an LED lamp according to the animation data, controlling the LED lamp beads in the LED lamp to light and extinguish to display animation graphs, and the temperature sensor is used for detecting the temperature of the LED lamp and sending a temperature detection result to the main control module. The invention can generate corresponding animation effect according to the vehicle body state and the user behavior; the power consumption can be actively controlled according to the system temperature; the LED self-checking function is provided, and the fault can be self-checked; the stacked design of the multilayer PCB board can fully utilize narrow space.

Description

Vehicle-mounted intelligent interaction system based on LED halo display

Technical Field

The invention relates to the field of vehicle-mounted control systems, in particular to a vehicle-mounted intelligent interaction system based on LED halo display.

Background

Along with the rapid development of the automobile industry in recent years, the competition among various large automobile factories is more and more intense, and the competition is particularly obvious on a vehicle-mounted entertainment system. Although the traditional vehicle-mounted computer has various types, the vehicle-mounted computer can not get rid of the carved image of a vehicle-mounted computer all the time, and with the rapid development of a smart phone, a similar electronic system can not attract the eyeball of people. With the development of artificial intelligence technology, personification of articles is gradually realized, and vehicles can also become life-like through interaction with users. As shown in FIG. 1, some car machines will also carry intelligent voice assistant, but the feedback to the user is limited to voice.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and the vehicle-mounted intelligent interactive system based on the LED halo display can give visual feedback to a user in order to make a vehicle-mounted intelligent assistant more anthropomorphic. The system CAN rapidly analyze the behaviors of a user and a vehicle through two paths of high-speed CAN interfaces, then dozens of three-color LEDs are rapidly lightened through the LED drive IC, and gorgeous animation is displayed as real-time response. The system has compact structure, adopts the design of the double-layer LED lamp ring, has beautiful animation and quick response, and can vividly feed back the user behavior and the real-time state of the vehicle to the user.

The technical scheme for solving the technical problems is as follows:

the vehicle-mounted intelligent interaction system based on the LED light ring display comprises a main control module, a Flash memory, a temperature sensor, a CAN data analysis module and an LED driving module, wherein the CAN data analysis module is used for acquiring vehicle state information and user behavior information, animation information corresponding to the vehicle state information and the user behavior information is prestored in the Flash memory, the main control module is used for taking corresponding animation data out of the Flash memory according to the vehicle state information and the user behavior information, controlling the LED driving module to light an LED lamp according to the animation data, controlling the LED lamp beads in the LED lamp to be turned on and off to display animation graphs, the temperature sensor is used for detecting the temperature of the LED lamp and sending a temperature detection result to the main control module, and the main control module is used for reducing the brightness of the LED lamp when the detection result exceeds a preset threshold value a so as to reduce the heat output of a heat source; when the detection result exceeds a preset threshold value b, the LED lamp is turned off to prevent the system from being damaged; and when the temperature is reduced to a preset threshold value c, controlling the LED lamp to recover to normal work.

Furthermore, the LED driving module has a self-checking function, and the LED driving module can transmit fault data back to the main control module through the SOUT pin.

Furthermore, the PCB board in the main control module adopts a stacking structure.

Furthermore, the CAN data analysis module comprises a vehicle body CAN and a private CAN, wherein the vehicle body CAN is used for acquiring vehicle state information, and the private CAN is used for acquiring user behavior information.

The invention has the beneficial effects that: 1. 2-path CAN communication is realized: the vehicle body CAN is mainly used for acquiring vehicle state information such as opening and closing of a vehicle door and the like, and the private CAN is mainly used for acquiring user behavior information; 2. generating corresponding animation effects according to the state of the vehicle body and the user behaviors; 3. temperature protection, namely actively controlling power consumption according to system temperature; LED self-checking: carrying out self-checking on faults occurring in production or use; 5. the multilayer PCB board pile design, make full use of narrow and small structural space.

Drawings

FIG. 1 is a schematic block diagram of the prior art;

FIG. 2 is a functional block diagram of the present invention;

FIG. 3 is a block diagram of an internal scheme of the present invention;

FIG. 4 is a circuit diagram of a master control module;

FIG. 5 is a circuit diagram of an LED driver;

fig. 6 shows the arrangement of the LED lamp sets.

Detailed Description

The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

As shown in fig. 2-6, a vehicle-mounted intelligent interactive system based on LED halo display is composed of a power supply module, an RH850 main control module, a CAN data analysis module, a Flash memory, an LED driving module, a double-layer LED ring, and a temperature sensor.

As an implementation manner, the main control module is an RH850 single chip of rassa electronics, and is used for controlling a system power supply, analyzing a CAN message, and controlling an LED driver. RH850 uses 16M passive crystal oscillator, connected with crystal oscillator through Pin28 and Pin 29; collecting the voltage division of the NTC and the 10K resistor through an AD module in the Pin43, and calculating the current temperature; the CAN controller 1 in the RH850 is connected with a CAN transceiver TJA1044 through Pin8 and Pin9, the CAN controller 2 is connected with TJA1043 through Pin11 and Pin12, the CAN transceiver transmits information to the CAN controller in the MCU through a TX/RX Pin after format conversion is carried out on messages on a CAN bus, or conversely, signals sent by the MCU are transmitted to the CAN bus after conversion; the Flash and the MCU are connected through 4 pins such as Pin72, 73 and the like through an SPI interface to realize communication between the Flash and the MCU, so that the RH850 can quickly store and read animation data. Pin53 is a power control Pin, through which the power-on and power-off of the system can be controlled, and the specific implementation needs to be matched with an INH signal output by TJA1043, the TJA1043 provides a short INH signal to supply to a DCDC enable Pin after being awakened, the MCU outputs a high level at Pin53 within the limited time, the high level is connected to the DCDC enable Pin to realize the control of the power supply of the system, and when the system needs to enter a sleep mode, the Pin is pulled down.

The model U10 of the LED driver is that TLC5958 supplies power for 3.3V, and communicates with MCU through signal interfaces such as SIN, LAT, SCLK, GCLK, SOUT, etc., the maximum current that each channel can output is controlled by R87, i.e. external ground resistance of IREF, and for global control, the MCU controls the brightness of each LED by operating the built-in register of TLC5958 to set the current output current of each channel. TLC5958 has 48 channels, and each channel can be connected with a single-color LED, each 3 of which is a group, and is connected with an RGB LED, and the LEDs are connected in a common anode mode. Due to the fact that the number of the channels is large, if the LED pins are open-circuited in mass production, the self-checking function of the TLC5958 can transmit fault data back to the MCU through the SOUT pins, and therefore the production jig can find errors or be convenient for follow-up maintenance and fault positioning. So as to avoid abnormal operation or shortened service life of the system. As the scheme of the invention, in order to enable the system to generate a beautiful animation effect, a three-layer PCB stacking design is adopted, wherein the middle layer and the upper layer are provided with LEDs, the LEDs are arranged in a ring shape, and light rays are scattered out through the lens, so that the stereoscopic impression and the fluency of the animation are ensured.

The working principle of the invention is as follows:

CAN Signal acquisition and analysis

User behaviors and vehicle information are acquired through two ways hung on a vehicle CAN bus, data are filtered and analyzed through two CAN transceivers, the analyzed data are transmitted to a CAN controller inside an MCU through the two CAN transceivers, and the MCU makes corresponding response according to the CAN data.

LED driver driving LED

After the CAN data are acquired, the MCU controls the LED driver to light the multi-path multi-color LEDs, and error information such as open circuit and short circuit of the LEDs returned from the LED driver is received.

3. Temperature protection

A large number of LEDs work in a closed space for a long time, the temperature of the system is inevitably increased, and temperature protection logic is added to ensure the normal work and the service life of the system. The temperature sensor is used for detecting the temperature, and the main control module is used for reducing the brightness of the LED lamp when the detection result exceeds a preset threshold value a so as to reduce the heat output of a heat source; when the detection result exceeds a preset threshold value b, the LED lamp is turned off to prevent the system from being damaged; and when the temperature is reduced to a preset threshold value c, controlling the LED lamp to recover to normal work.

PCB board stack design: the product A surface area is small, and is a multilayer light-emitting structure, and the number of components is more, so the multilayer circuit board stacking design is adopted. The LED and main control IC, LED drive and the like are arranged on the upper middle layer, the power supply is arranged on the lower layer, and the boards are connected through the board-to-board connector and are limited and fixed by the structure.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The vehicle-mounted intelligent interaction system based on the LED halo display is characterized by comprising a main control module, a Flash memory, a temperature sensor, a CAN data analysis module and an LED driving module, the CAN data analysis module is used for acquiring vehicle state information and user behavior information, animation information corresponding to the vehicle state information and the user behavior information is prestored in the Flash memory, the main control module is used for taking out corresponding animation data from the Flash memory according to the vehicle body state information and the user behavior information and controlling the LED driving module to light the LED lamp according to the animation data, the animation graph is displayed by controlling the on and off of the LED lamp beads in the LED lamp, the temperature sensor is used for detecting the temperature of the LED lamp, the temperature detection result is sent to the main control module, and the main control module is used for reducing the brightness of the LED lamp when the detection result exceeds a preset threshold value a so as to reduce the heat output of a heat source; when the temperature detection result exceeds a preset threshold value b, turning off the LED lamp to prevent the system from being damaged; and when the temperature detection result is less than or equal to the preset threshold value c, controlling the LED lamp to recover to normal work.

2. The LED light ring display-based vehicle-mounted intelligent interaction system as claimed in claim 1, wherein the LED driving module has a self-checking function, and the LED driving module can transmit fault data back to the main control module through a SOUT pin.

3. The LED light ring display-based vehicle-mounted intelligent interaction system as claimed in claim 1, wherein the PCB board in the main control module is in a stacked structure.

4. The vehicle-mounted intelligent interaction system based on the LED light ring display is characterized in that the CAN data analysis module comprises a vehicle body CAN and a private CAN, the vehicle body CAN is used for acquiring vehicle state information, and the private CAN is used for acquiring user behavior information.