| 摘要: |
| 海底沉积物的电阻率测量技术广泛应用于海洋地质调查、海洋环境研究等领域,基于海底钻机的原位探测仪为平台,开发了一套电阻率测试系统,为精确处理电阻率探头输出的微弱电压信号,对互相关算法进行了理论推导和MATLAB仿真,并在实际电路中以互相关算法在DSP(TMS320F28069)的移植为核心设计了相关软硬件,大量的对比试验表明,互相关技术是一种有效的微弱信号处理方法,可提高海底沉积物电阻率测量的精度和抗干扰能力. |
| 关键词: 海底沉积物 电阻率 互相关 微弱信号处理 |
| DOI： |
| 分类号:TP216 |
| 基金项目:国家“十二五”863计划海洋领域课题(2012AA091301) |
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| Application of cross-correlation detection in submarine sediment resistivity measurement |
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MA Bin1, LUO Bo-wen2, CHEN Qi3, WU Lai-jie11,2,3
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1. College of Mechanical and Electronic Information, China University of Geosciences, Wuhan 430074,China;2. Engineering Research Center of Advanced Mining Equipment, Ministry of Education,Hunan University of Science and Technology, Xiangtan 411201,China;3. Guangzhou Marine Geological Survey, Ministry of Land and Resources, Guangzhou 510760 ,China
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| Abstract: |
| The technology of submarine sediment resistivity measurement is widely used in such as the marine geological survey, the marine environment research. A resistivity measurement system was developed in the platform of in-situ measurement which based on seafloor drilling machine. In order to precision manage the weak voltage signal which outputted by the resistivity probe, the cross-correlation algorithm theoretical was derivated and MATLAB simulation was carried out. Finally the software was transported in TMS320F28069 DSP processor and hardware was designed . A Mass of contrast experiment shows that the cross-correlation detection is an effective way to process weak signal. It can not only improve the submarine sediment resistivity instrument’s accurate, but also improve the anti-jamming ability. |
| Key words: submarine sediment resistivity cross-correlation weak signal process |
