Optical Capture Structure for High-Speed Position Tracking
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Solution Overview
Problem
Current methods for determining the position and alignment of movable objects in machine systems, such as coordinate measuring machines and medical treatment apparatuses, face challenges in efficiently capturing and evaluating optical data from capture structures, particularly in high-speed and high-resolution applications, leading to potential errors and inaccuracies.
Innovation Solution
The use of capture structures with a profile of optical properties that vary along a surface, allowing for quick evaluation through frequency analysis, where the optical property is expressed by numerical values and processed using digital Fourier transformations to determine the position and alignment of movable objects with high accuracy and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical capture methods are used to determine position and alignment, then the system can track movable objects, but the evaluation is too slow and inaccurate for high-speed applications
Solution Approach 1:
The patent transforms the capture structure's optical properties into a periodic pattern (sine wave modulation) where position information is encoded as phase shifts. This parameter transformation allows the evaluation system to extract position data through frequency analysis rather than complex image processing, achieving both high speed and high precision simultaneously
Solution Approach 2:
The patent replaces conventional mechanical/image-based position evaluation with optical frequency domain analysis. By modulating the optical properties and analyzing frequency spectra, the system achieves faster and more accurate position determination without relying on traditional image processing methods
2Productivity
If conventional capture structures are used, then the system can determine position, but the evaluation process is computationally intensive and slow
Solution Approach 1:
The patent encodes position information into the phase parameter of a periodic optical signal. This allows the evaluation to use efficient Fourier transform methods rather than computationally intensive image analysis, simultaneously improving evaluation speed and maintaining high precision through phase measurement
Solution Approach 2:
The capture structure uses periodic modulation of optical properties (sine wave pattern) to encode position information. This periodic structure enables the use of frequency domain analysis methods that are computationally efficient and can be processed rapidly while providing precise position data through phase detection
3Measurement precision
If high-resolution optical capture is performed to improve accuracy, then position precision increases, but the processing time increases and speed decreases
Solution Approach 1:
The patent substitutes complex high-resolution image processing with optical frequency analysis. By using periodic optical modulation and Fourier transforms, the system achieves high alignment accuracy through phase measurement without requiring computationally intensive image processing, thus reducing evaluation time
Solution Approach 2:
The patent transforms spatial position information into temporal phase information through periodic optical modulation. This parameter transformation allows precise alignment determination through phase detection in the frequency domain, which is computationally faster than spatial image analysis while maintaining high accuracy
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
This approach enables fast and accurate determination of position and alignment, even in high-speed movements, reducing errors and improving the precision of movement tracking in machine systems, facilitating open-loop or closed-loop control.
Implementation Method 1
the capture structure has a profile of an optical property that varies along a surface of the capture structure
Implementation Method 2
a capturing device for optically capturing the capture structure
Data Source
AI summary
A position of a movable object is determined with a capture structure having a profile of an optical property that varies along a surface of the capture structure such that the profile corresponds to a progression of numerical values with local maxima and local minima on an ordered scale of the numerical values, and which is interpretable as a first mathematical function of the location. The optical property varies such that a second mathematical function of the location has an absolute maximum corresponding to a maximum value of the optical property. The optical property has assigned corresponding numerical values such that the progression thereof has the local maxima and the local minima and corresponds to the first mathematical function of the location. The position of the movable object is determined by a frequency analysis of the progression of the numerical values of the second mathematical function of the location.