Technological advancement

Hardware design

(1) The processor selects a quad-core automotive chip based on the Cortex A9 architecture, with a maximum operating speed of 1.2GHz and a high-performance computing capability of 2.2 billion instruction sets per second, which can meet the real-time requirements of embedded image processing. The chip supports a variety of expansion interfaces, and various functions can be added according to actual needs.

(2) The LED control unit uses the chip developed by Texas Instruments, which can independently control the brightness of 12 LED lamp beads, and uses a single 10-bit pulse width modulation (PWM) to control the LED, which can achieve pixel-level light intensity adjustment. The chip replacement need a large number of circuit board space to accommodate multiple transistors, gate drivers and bonding logic and other huge discrete circuits, to achieve all-solid LED control system with no moving parts, so as to avoid wear or failure problems of motor and other moving parts. The chip has LED on/short circuit fault diagnosis function, which can alert the driver through the main controller in case of lamp failure or damage.

Software development:

(1) Compared with the ordinary single-chip microcomputer which can only complete a single task, the embedded Linux system can achieve multi-task parallel function, and simultaneously process multiple input information. Linux has a unique kernel module mechanism, which can customize the kernel according to the needs of users, making the kernel compact, occupying less resources, and running more stable and faster.

(2) Based on the characteristics of night vehicle imaging, the night vehicle recognition program for this system is designed to optimize the color conversion algorithm and improve the running speed.

(3) Embedded network architecture FlexCAN is adopted to transmit information, and the advantages of FlexRay and CAN bus are combined to realize time-based priority communication at the protocol layer and improve the reliability of information transmission.

(4) Set the information transmission timing monitoring function to remind the driver when information loss or delay is detected.

Technology maturity

At present, the night vehicle identification module, information transmission module and LED control module included in the system have been completed and verified by experiments. In the night vehicle detection, the detection rate can reach more than 95%, and the image processing speed is less than 50ms, which meets the real-time and quasi-deterministic requirements of the actual use of the embedded system.

Expected benefit

1. Automotive LED headlights equipped with adaptive high beam lighting system can provide car headlights designers with more design freedom. car Headlights can be designed in line with consumer aesthetics.The car active safety lighting function provided by this system, reduce the difficulty of night driving, attract consumers to buy, and stimulate the development of the automotive industry;

2. Automobile adaptive high beam safety lighting system can eliminate glare pollution, improve night driving safety and comfort, reduce the probability of accidents caused by glare, reduce unnecessary vehicle losses, and improve social and economic benefits.

The type of business we want to work with

LED lighting manufacturing company