摘要
实现精准的水下定位对现代海洋资源探测与开发具有重要意义。介绍了以STM32F4系列嵌入式处理芯片作为核心,以声呐收发电路作为声基阵阵元建立直角三角形分步的短基线定位声基阵,利用DMA技术和窗口采集法对水下声波探测基阵的信号进行处理的水下定向定位方案。结果表明,系统中采用的自动阈值检测法与传统的固定阈值检测法相比,稳定性有所提高,DMA技术提高系统数据采集速度,使单路采集精度达到毫米级。该系统适用于低成本、低移速的水下目标定向测距或百米范围水下定位。
Accurate underwater positioning is of great significance to the exploration and development of modern Marine resources.This paper introduces an underwater directional positioning scheme,which USES STM32F4 series embedded processing chips as the core,sonar transceiver circuit as the acoustic array element to establish a right triangle step by step short-baseline positioning acoustic array,and uses DMA technology and window acquisition method to process the signal of underwater acoustic detection array.The results show that the automatic threshold detection method adopted in the system is more stable than the traditional fixed threshold detection method,and the DMA technology improves the data acquisition speed of the system,so that the single-channel acquisition accuracy reaches millimeter level.The system is suitable for low-cost and low-velocity underwater target location or small-range shallow sea location applications.
作者
夏宇
王瑛
王铁流
Xia Yu;Wang Ying;Wang Tieliu(Faculty of Information Technology,Beijing University of Technology,Beijing 100124,China)
出处
《国外电子测量技术》
2020年第5期61-65,共5页
Foreign Electronic Measurement Technology
