声学信号采集及网络传输系统设计

摘要

Based on the requirement of long time and high precision acquisition of underwater acoustic signals. System based on STM32F207 microcontroller embedded ARM as the main controller,With 24 bit high-precision A/D conversion chip,the collected signal to a system through the network transmission module. The system makes use of the STM32F207 chip resources collocation signal conditioning circuit, AD conversion reference power and anti interference measures,which not only reduces the power con?sumption of the system,and ensure the accuracy and stability of the system. Through the anechoic pool test,the signal acquisition fully meets the acoustic signal of high precision acquisition requirements, Signal conversion error is less than 50μv.%基于对水中声信号长时间、高精度采集的要求,系统以内嵌ARM核的微控制器STM32F207作为主控制器,配合24位高精度A/D转换芯片,将采集信号通过网络传输模块传送到上一级系统.系统充分利用STM32F207的片上资源,搭配信号调理电路、AD转换基准电源及抗干扰措施,既降低了系统功耗,又保证了信号的采集精度和系统工作稳定性,经过消声水池实测,系统完全满足对声学信号高精度采集的要求,信号转换误差在50μv以内.