AVAS module technology

This product is to simulate the sound of the car engine, remind pedestrians that the vehicle is approaching to avoid traffic accidents, ensure pedestrian safety, used in new energy electric vehicles, this product uses CAN bus to connect with the car host, by the CAN protocol to provide acceleration, deceleration, current speed of the vehicle various status information, through the CAN control alarm to accelerate and decelerate the sound and control volume.
This technical solution is a pedestrian warning control module developed for Mianyang Longsheng. Mainly responsible for the acquisition and processing of peripheral analog (enable switch) signals; Realize the analysis and processing of CAN bus messages, and realize the algorithm implementation of idling, acceleration and deceleration, uniform speed, and reversing warning sound sound control logic; Realize the sound control of the audio IC; Realize functional diagnosis according to Longsheng automobile diagnostic standards; The audio adopts a dedicated independent IC to realize the functions of volume gradient, fundamental frequency shift and continuous playback of audio files; The power chip realizes 12V to 5V and 5V to 3.3V DCDC conversion management, providing regulated power supply for MCU, audio IC and other ICs. FLASH adopts a separate 25PE16 IC with a FALSH space of 16M to meet the storage space requirements of related audio files. In addition to the electromagnetic compatibility design of the control circuit itself, in addition to the electromagnetic compatibility design of the control circuit itself, for the long distance between the speaker and the controller, the audio power output of the circuit adopts a reasonable filter circuit and noise reduction design to ensure the product performance requirements.
A. Hardware: Schematic and PCB boards are optimized by mature platforms. B. Structure: Size: (83.5*86*86mm), IP grade to IP67, new development and design. C. Software: Sound logic algorithm and sound effect control are newly developed according to the requirements of Longsheng Automobile, and some platforms are borrowed.