Research And Design About The Black Box Of Vehicle With The Audio

Vehicle data recorder (auto indestructible black-box) is designed to record and preserve the information of vehicle movement. And it can provide analysis of incident, and discovery the troubles of vehicles.We design a vehicle data recorder with pronunciation and high capacity data record,which refered to"vehicle data recorder GB/T 19056.2003".The main tasks of this thesis are:According to the requirements of automotive black-box systems, we put forward the performance of the system ,explain the soulation of black-box system, and design the hardware of vehicle data recorder based on the ARM .Divide the whole system into several parts including speech processing module, communication module, data processing module, data record module, display module, etc.And explain the design of hardeware and software.Realize the compression of low speed signal using G. 723.1 speech decoding algorithm.Realize the storageof large quantities of reliable data using direct literacy ferroelectric (FRAM) and Nand FlashWrite the communication software of CAN,USB,RS485,etc.to realize the communication of multiple peripherals real-time.