3D Resistivity Data Acquisition via Arbitrary Electrode Placement

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Solution Overview

Problem

Conventional 3D high-density electrical resistivity surveys are limited by the need for a regular grid layout, long cables, and restricted movement directions, making them unsuitable for complex urban or environmental conditions, and they suffer from low acquisition efficiency and inaccurate data due to random electrode positioning and serial measurements.

Innovation Solution

A data acquisition method for 3D high-density resistivity based on arbitrary electrode distribution, where electrode pairs are strategically placed and moved according to surface conditions, allowing for parallel measurements within an effective measurement circle, and supplementary points are added to improve resolution as needed, using a systematic approach to optimize electrode placement and data collection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a regular grid layout is used for electrode placement, then the measurement process is standardized and systematic, but the adaptability to complex surface conditions (rivers, roads, buildings) is severely limited

Engineering Contradiction:

Improveadaptability to complex surface conditionsVSAvoidlayout complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The electrode array is divided into multiple independent groups that can be independently positioned and configured. Each group can be adapted to local surface conditions while maintaining overall system functionality, allowing flexible deployment in complex urban environments without requiring a complete regular grid structure

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The electrode placement system transitions from a static regular grid to a dynamic configuration that can be adjusted based on surface conditions. The system allows electrodes to be positioned at arbitrary locations while maintaining measurement capabilities through real-time parameter updates and flexible connection schemes

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If a long cable connects all electrodes in serial order, then the measurement process is systematic, but the labor intensity increases and cable laying becomes difficult in obstructed areas

Engineering Contradiction:

Improveease of cable layingVSAvoiddata acquisition efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The cable system is segmented into multiple independent sections connecting different electrode groups. This eliminates the need for a single long cable spanning all electrodes, reducing labor for cable laying and minimizing obstruction issues while maintaining systematic measurement capabilities through coordinated data collection from multiple segments

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The measurement system transitions from one-dimensional serial measurement along a single cable to a multi-dimensional parallel measurement architecture. Multiple electrode groups can be measured simultaneously or in coordinated sequences, improving productivity while reducing cable complexity through spatial distribution

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Productivity

If four electrodes are used for each measurement in conventional high-density resistivity instruments, then the measurement process is simple, but the acquisition efficiency is low

Engineering Contradiction:

Improvedata acquisition efficiencyVSAvoidinstrument complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

Multiple electrode groups are merged into a coordinated measurement system where data from several groups are collected and processed together. This allows parallel acquisition of multiple measurement datasets simultaneously, dramatically improving productivity while the integrated processing system manages the increased data volume through unified inversion algorithms

Inventive Principle:

Principle #5Merging (Combining)

4Adaptability or versatility

If electrodes are randomly positioned to adapt to surface conditions, then the adaptability improves, but the measurement precision decreases due to inability to form standard electrode combinations

Engineering Contradiction:

Improveflexibility in electrode placementVSAvoidapparent resistivity measurement accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The system dynamically adjusts measurement parameters including electrode assignment, current magnitude, and measurement sequences based on the actual arbitrary positions of electrodes. This allows accurate apparent resistivity calculations even when electrodes cannot form standard geometric configurations, maintaining precision while maximizing placement flexibility

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20230273336A1Data acquisition method of three-dimensional high-density resistivity based on arbitrary electrode distribution

Publication Date: 2023.08.31 ZHEJIANG UNIV

AI summary

A data acquisition method for three-dimensional high-density resistivity based on arbitrary electrode distribution, comprising the following steps: evenly providing measurement points in a predetermined measurement area, and selecting endpoint positions and directions of electrode pairs according to surface conditions; sequentially moving a power supply to each of the measurement points according to the identification numbers, with the electrode pair at the current point as the power supply electrode pair, and the electrode pair within the effective measurement circle corresponding to the current point as the measurement electrode pair; continuing the process until all measurement points are powered, and a rolling measurement of the entire measurement area is complete.