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海底底质声学原位测量电路控制系统研究
吕 斌1, 祁国梁1, 李官保2, 王景强2, 刘 杰1
1.齐鲁工业大学(山东省科学院), 山东省科学院海洋仪器仪表研究所;2.国家海洋局第一海洋研究所
摘要:
介绍了一种液压驱动贯入式海底沉积声学原位测量系统的电路控制单元的研究实现过程, 以及该控制单元在南海北部海底沉积声学调查中的应用。该电路控制单元以Cortex-A8处理器为核心, 集成大容量FLASH存储器, 与单片机接口控制板进行串口通讯, 实现对声学发射采集单元和机械液压贯入单元的可视化控制和监测。基于该电路控制单元, 海底底质声学原位测量系统兼具自容式和在线式两种工作模式, 可自容记录或实时采集声学原位测量单元在海底的工作状态数据、海底沉积物声速和声衰减系数等声学特性数据。该声学原位测量系统的实验室联调及南海海试结果表明, 使用该电路控制单元对海底底质声学测量过程的监测与控制是有效的, 对精确获取海底底质的原位声学特性有重要作用, 可以促进海底底质声学原位测量系统的产品化。
关键词:  原位测量电路控制系统  海底沉积物  Cortex-A8  声学测量
DOI:10.11759/hykx20170828001
分类号:
基金项目:海洋公益性行业科研专项经费项目(201405032)
Technology of a circuit control system for in-situ acoustical measurement of ocean floor sediments
LÜ Bin,QI Guo-liang,LI Guan-bao,WANG Jing-qiang,LIU jie
Abstract:
A self-contained circuit control system for in-situ acoustical measurement of seabed sediment using hydraulic driving penetration is introduced. Its application in the northern area of the South China Sea is described in detail. The system used an Cortex-A8 processor and an integrated, large-capacity FLASH memory, which communicated with the microcontroller unit (MCU) interface control board by serial port. It was designed for in- situ video control and monitoring of sound speeds and attenuation coefficients in sea-floor sediments. The circuit control system, which works in either capacitance or online mode, can record acoustical data or measure it in-situ in real time. The acquired data included working-state data of the sea bottom and seabed sediment acoustical characteristics such as sound velocity and acoustic attenuation coefficient. Results from the laboratory and the South China Sea showed that the control system is effective in monitoring and controlling the process of seabed sediment acoustical measurement. It plays an important role in the in-situ measurement of the acoustical quality of the seabed and promotes the design of an underwater in-situ acoustical measurement system.
Key words:  circuit control system in situ measurement  seafloor sediments  Cortex-A8  acoustic measurement
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