A Python tool converting geophone to DAS response
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<p>This script delineates the development and validation of a specialized Python tool devised to enhance geophysical data analysis on Distributed Acoustic Sensing (DAS). The tool skillfully converts&nbsp;geophone measurement to&nbsp;DAS strain responses.</p> <p>The input of the script contains continuous&nbsp;3-component&nbsp;point displacement measurements from&nbsp;geophone, their corresponding Cartesian coordinate locations and a designated gauge length&nbsp;(depends on instrument). Through integration along the fiber within the established gauge length, the script output the equivalent numbers of&nbsp;DAS strain response.&nbsp;Featuring a sub-function convert velocity to displacement, this&nbsp;tool can also convert displacement/velocity to DAS strain/strain rate response. The time complexity is limited by the spacing of geophone&nbsp;and gauge length,&nbsp;but acceptable for practical&nbsp;scenario&nbsp;where the number of continuous geophone&nbsp;measurements is less than&nbsp;1000.</p> <p>The tool&nbsp;has been validated&nbsp;through rigorous numerical experiments, wherein pseudo plane waves&nbsp;were generated and the result is compared&nbsp;with established plane wave analytical solutions. This contribution&nbsp;serves as a step towards refining data processing methodologies in geophysical studies, fostering a seamless and efficient transition to modern DAS technologies.</p>
本脚本详述了一款面向分布式声学传感(Distributed Acoustic Sensing, DAS)地球物理数据分析的专用Python工具的研发与验证流程。该工具可将检波器(geophone)的测量数据转换为DAS应变响应。 该脚本的输入数据包含来自检波器的连续三分量点位位移测量值、对应的笛卡尔坐标位置,以及由仪器型号决定的指定标距长度(gauge length)。通过沿设定标距长度内的光纤进行积分运算,脚本可输出等效的DAS应变响应。该工具附带将速度转换为位移的子功能,因此也可将位移/速度数据转换为DAS应变/应变率响应。其时间复杂度受检波器间距与标距长度限制,但在连续检波器测量数据量少于1000的实际应用场景中,运行效率可满足需求。 该工具已通过严谨的数值实验完成验证:实验中生成了伪平面波,并将工具输出结果与已确立的平面波解析解进行对比。本研究成果可为优化地球物理研究中的数据处理方法体系提供支撑,助力向现代DAS技术实现平滑高效的过渡。




