| 基于DPHP技术测量沉积物热导率的数据处理 |
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| 引用本文： | 李官保,刘保华,丁忠军.基于DPHP技术测量沉积物热导率的数据处理[J].物探与化探,2009,33(6). |
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| 作者姓名： | 李官保 刘保华 丁忠军 |
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| 作者单位： | 国家海洋局,第一海洋研究所,山东,青岛,266061 |
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| 摘 要： | 双针热脉冲(DPHP)技术被用于原位测定海洋沉积物的热导率.数据处理过程直接决定从实测数据中提取热导率的精度与效率.根据实测数据,结合海上测量可能出现的问题,探讨了DPHP技术实测数据的处理方法,提出了一套数据预处理流程,并对2种热导率计算模型和计算方法进行了对比分析.研究表明,原始数据经过数据滤波、数据截取和背景场拟合剔除等预处理过程,得到的热脉冲温度响应曲线可用于热导率计算.计算热导率可采用K-B模型或者简化模型,后者具有降低运算量,减小误差积累的优点.热导率计算方法有极值法和拟合法,如果采样率足够高,极值法是首选方法.
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| 关 键 词： | 双针热脉冲(DPHP)技术 海洋沉积物 热导率 |
DATA PROCESSING TECHNIQUE FOR DUAL-PROBE HEAT-PULSE METHOD TO DETERMINE THERMAL CONDUCTIVITY OF MARINE SEDIMENTS |
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| LI Guan-bao,LIU Bao-hua,DING Zhong-jun.DATA PROCESSING TECHNIQUE FOR DUAL-PROBE HEAT-PULSE METHOD TO DETERMINE THERMAL CONDUCTIVITY OF MARINE SEDIMENTS[J].Geophysical and Geochemical Exploration,2009,33(6). |
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| Authors: | LI Guan-bao LIU Bao-hua DING Zhong-jun |
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| Abstract: | Dual-Probe Heat-Pulse method was modified for application of determining in-situ thermal conductivity of marine sediments. It was crucial to process DPHP data and extract thermal conductivity from these data. A processing flow was established based on measured data with consideration of the specific measurement situations at sea. The pre-processing procedure, including filtering, trimming, and ambient temperature fitting and eliminating, was suggested in order to obtain a temperature response curve of heat pulse, which was then utilized to calculate thermal conductivity. Besides the K-B model, a simplified model to calculate thermal conductivity was advanced which has advantage in reducing operation and cumulative error. By comparing the two thermal conductivity calculation methods, extremum method and fitting method, it was proposed that the extremum method will be the first choice so long as the sampling rate was high enough. |
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| Keywords: | Dual-Probe Heat-Pulse method thermal conductivity data processing |
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