Georeferencing Target Unit for UAV Survey Accuracy
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Solution Overview
Problem
Current aerial surveying methods require expensive and technically complex georeferencing processes, often necessitating certified surveyors and high-end GPS equipment, making it costly and inaccessible for widespread use, especially with the increasing volume of un-georeferenced imagery from UAVs.
Innovation Solution
A low-cost, automated georeferencing system using a georeferencing target unit with a visual marker, internal GPS tracking, microcontroller, and wireless network interconnection, capable of uploading data for processing, which simplifies the georeferencing process without the need for expensive equipment or technical expertise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional georeferencing methods using certified surveyors and high-end GPS equipment are used, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces expensive, complex surveyor-grade equipment with inexpensive, consumer-grade GPS receivers and automated target units. The georeferencing targets are simple, disposable markers that can be easily placed and removed, eliminating the need for permanent survey markers and complex surveying instruments.
Solution Approach 2:
The system enables users to perform georeferencing independently without requiring certified surveyors. The automated target units with visual markers and GPS receivers allow users to capture and upload georeferenced data directly from their devices, making the process self-service oriented and accessible to non-experts.
2Measurement precision
If certified surveyors manually survey ground control points, then measurement precision is improved, but loss of time and productivity decrease
Solution Approach 1:
The georeferencing targets are pre-equipped with GPS receivers, visual markers, and automated data capture capabilities before being placed at survey locations. This preliminary preparation eliminates the need for surveyors to manually measure and record coordinates in the field, significantly speeding up the surveying process.
Solution Approach 2:
The patent replaces manual mechanical surveying processes with automated electronic systems. GPS receivers automatically capture coordinates, digital cameras automatically capture images, and wireless transmission automatically transfers data, eliminating the need for manual measurement and recording operations.
3Measurement precision
If kinematic GPS units with precise timestamp synchronization are used, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The system uses inexpensive consumer-grade GPS receivers instead of expensive kinematic surveying equipment. While individual receivers are less precise, the automated target units with multiple receivers and sophisticated image processing algorithms achieve comparable or superior georeferencing accuracy at lower cost.
Solution Approach 2:
The patent introduces an intermediary processing system that includes automated image recognition algorithms and cloud-based processing. This intermediary layer compensates for the limitations of consumer-grade GPS receivers by using computational methods to align and georeference images accurately, bridging the gap between low-cost hardware and high-precision requirements.
4Ease of operation
If ground control points are placed in heavily trafficked areas, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The visual markers on the georeferencing targets are designed to be dynamic and adaptable. The targets can be placed in various locations including heavily trafficked areas, and the system automatically adjusts for their presence through image recognition algorithms that can identify and ignore transient objects like vehicles or pedestrians.
Solution Approach 2:
The targets use high-contrast visual markers with distinctive color patterns that are easily distinguishable from natural ground features and transient objects. The markers are designed to be visible from aerial views and can be recognized automatically by image processing algorithms, ensuring accurate identification regardless of placement location.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables highly accurate and cost-effective georeferencing for aerial surveys, allowing users to produce survey-grade datasets without the expense of traditional surveyors or complex processing, using consumer-grade GPS receivers and antennas, and automating the integration of GPS data with imagery.
Implementation Method 1
The unit can include a solar cell charging unit for charging the power supply
Implementation Method 2
an internal gps tracking unit tracking the current position of the target unit
Data Source
AI summary
Integrated Visual Geo-referencing Target Unit ABSTRACT A georeferencing target unit including: a generally planar top surface including a visual marker structure on the top surface, dimensioned to be observable at a distance by a remote visual capture device; an internal GPS tracking unit tracking the current position of the target unit; a microcontroller and storage means for storing GPS tracking data; and wireless network interconnection unit for interconnecting wirelessly with an external network for the downloading of stored GPS tracking data; a power supply for driving the GPS tracking unit, microcontroller, storage and wireless network interconnection unit, a user interface including an activation mechanism for activating the internal GPS tracking unit to track the current position of the target unit over an extended time frame and store the tracked GPS tracking data in the storage means.