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海底底质声学原位测量电路控制系统研究
吕斌
作者单位E-mail
吕斌 山东省科学院海洋仪器仪表研究所 lvbin20031@163.com 
摘要:
本文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:P733. 23
基金项目:海洋公益性行业科研专项经费项目
The Research for Circuit Control System of In-situ Measurement Technology to the Survey of Seafloor Sediment Acoustic
LÜ Bin
Abstract:
A circuit control system of self-contained and direct reading in situ sediment acoustic measurement based on hydraulic driving penetration and its application in the northern area of the South China Sea are introduced in detail. The circuit control system based on Cortex-A8 processor, and integrated large capacity FLASH memory, which communicated with MCU Interface Control Board by serial port, was designed for in situ video control and monitoring of sound speeds and attenuation coefficients of sea-floor sediments. The circuit control system, which work two kinds mode of capacitance or online, can acquire acoustic data with record or real time mode in situ measurement. The acquired data included working state data of the sea bottom, the seabed sediment acoustic characteristics data such as sound velocity and acoustic attenuation coefficient. System test in laboratory and South China Sea test results show that the control system is effective for the monitoring and control working process of seabed sediment acoustic measurement. Also it plays an important role in accurate obtain the in-situ acoustic characteristics of the bottom quality of seabed and promote the production of the underwater acoustic in-situ measurement system.
Key words:  Circuit control system in situ measurement  seafloor sediments  Cortex-A8  acoustic measurement
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