Research on a virtual simulation measurement system of high-density electrical method
[Objective]The high-density electrical method is widely used in geological exploration,yielding remarkable results and economic benefits in geological and topographic surveys worldwide.However,the traditional approach to geological field exploration often encounters challenges owing to environmental complexity,making it difficult to identify suitable sites for investigating geological issues.This situation is further complicated by various site factors that hinder students'research,learning,and experimental operations.Additionally,electrical exploration experiments pose safety risks and potential equipment damage due to environmental hazards and high currents,especially for individuals unfamiliar with instruments.The advent of the pandemic has further underscored the need for a geophysical experiment teaching model adaptable to special periods.Advances in three-dimensional(3D)computer graphics interaction technology,computer-aided measurement technology,and Internet service technology have made simulation measurement and instrument emulation feasible.These developments offer a promising avenue for teaching geophysical virtual simulation experiments and numerical simulations.The virtual simulation system for the high-density electrical method enables scene simulation,thereby facilitating the selection of appropriate layout schemes and routes.Indirect experiments can reduce the time and distance required for actual operation and minimize instrument loss.This approach allows learners to grasp the principles and processes of the experiment more comprehensively and improves their interest in learning while mitigating risks.However,forward numerical simulation of high-density electrical prospecting remains an area requiring further investigation.Additionally,the current software algorithms for the numerical simulation of the high-density resistivity method typically run on local single machines,presenting issues such as separate authorization and the inability to operate in real time.In addition,when employing experimental schemes involving multiple parameters,a universal system is lacking,instead,measurements are tailored to specific geological bodies under certain conditions.[Methods]In this context,we propose an online virtual simulation measurement system and a solution for the high-density resistivity method based on WebGL.Advancements in 3D geological modeling technology,high-density electrical instrument simulation technology,3D visualization interactive technology,and web-based high-density electrical forward modeling technology under complex terrain and geological conditions have been a focus of study and implementation.[Results]This effort has led to the design,development,and integration of a system that provides an efficient and reliable 3D-visual simulation web application.Specifically,this application facilitates numerical simulation analysis of high-density electrical finite-element forward modeling technology,overcoming the traditional constraints of time,space,and equipment availability.Consequently,experimental personnel can observe the entire experimental process.[Conclusions]This system enables virtual simulations that offer a more intuitive and vivid experimental experience and introduces a novel experimental method for geophysical teaching.This allows for the construction of actual geological environment models and the performance of simulation measurements,aiding significantly in the auxiliary design of engineering explorations.Finally,the effectiveness of this virtual measurement system is demonstrated through its application in reservoir dam leakage exploration.
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