3D Sensor Coordinate Alignment Using Multi-Plane Measurement
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Solution Overview
Problem
Existing systems struggle to integrate coordinate systems of sensors positioned at different locations, especially in wide-range measurement applications, where overlapping visual fields and accurate marker measurement are challenging.
Innovation Solution
A data processing device and method that acquire measurement data from three or more planes of a measurement object with different normal vectors, and use this data to find a transformation expression that integrates the coordinate system of one sensor position into another, allowing for easy alignment of coordinate systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If coordinate systems of sensors at different positions are integrated using conventional methods, then measurement accuracy is improved, but the system cannot be applied to wide-range measurement applications
Solution Approach 1:
The patent extracts the plane information from the measurement object and uses it as an intermediary reference. By taking out the plane data and using its normal vector and position, the system establishes coordinate transformation without requiring visual field overlap or complex marker measurement, thus enabling wide-range measurement while maintaining accuracy.
Solution Approach 2:
The measurement plane serves as an intermediary between sensors at different positions. The plane's geometric information (normal vector and position) mediates the coordinate transformation process, allowing accurate integration of coordinate systems across wide ranges without direct sensor-to-sensor calibration.
2Measurement precision
If visual fields of sensors are required to overlap for coordinate integration, then coordinate system integration is achieved, but the system complexity and measurement constraints increase
Solution Approach 1:
The patent extracts plane information as a separate reference element, removing the requirement for visual field overlap. By using the extracted plane data for coordinate transformation, the system simplifies the measurement setup while maintaining integration accuracy.
3Measurement precision
If markers are used for coordinate system integration, then measurement accuracy is improved, but the requirement for accurate marker measurement limits wide-range application
Solution Approach 1:
The patent replaces markers with plane information as the intermediary reference. The plane's geometric properties (normal vector and position) serve the same function as markers but without the limitations of accurate marker measurement, enabling wide-range coordinate integration.
Data Source
AI summary
A data processing device processes measurement data measured by a sensor that measures three-dimensional coordinates of a measurement object from a first position and a second position which are different. The data processing device includes a controller. The controller acquires measurement data of three or more planes of the measurement object from the sensor, the planes having different normal vectors. The controller finds, from the acquired measurement data, a transformation expression that integrates a coordinate system of the sensor at the second position into a coordinate system of the sensor at the first position.