Vibration Measurement via Pattern Light Angle Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibration measurement systems for infrastructure elements face challenges in achieving high accuracy due to the need for manual alignment of image capturing and target surfaces, which incurs significant human, time, and monetary costs, especially when the surfaces are not parallel.
Innovation Solution
A vibration measurement system that projects pattern light onto a structure, uses an image capturing apparatus to detect the pattern, estimates the angle between the image capturing and target surface normals, and converts images to align them, allowing for accurate vibration measurement without manual operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the image capturing apparatus and target surface are arranged directly facing each other with parallel surfaces to enhance measurement accuracy, then vibration measurement precision is improved, but device complexity and ease of operation deteriorate due to the difficulty of manual alignment
Solution Approach 1:
The system performs self-alignment by automatically calculating the angle between the image capturing surface normal and target surface normal using pattern light detection, eliminating the need for manual alignment operations while maintaining measurement precision
Solution Approach 2:
The system changes the operational parameters by introducing angle calculation and image conversion based on the detected pattern light, allowing accurate vibration measurement without requiring the image capturing surface to be parallel to the target surface
2Measurement precision
If markers with repetitive patterns are attached to the infrastructure element to enable accurate vibration measurement without direct facing arrangement, then measurement precision is improved, but device complexity and productivity deteriorate due to manual attachment requirements
Solution Approach 1:
The invention extracts the alignment function from manual operations by using an optical apparatus to project pattern light and an image capturing apparatus to detect it, automatically determining the angle between surfaces without requiring physical markers to be attached
Solution Approach 2:
The system replaces the mechanical attachment of physical markers with an optical field-based approach, using projected pattern light to achieve the same alignment and measurement objectives without physical contact or manual installation
3Measurement precision
If manual alignment operations are performed to achieve accurate vibration measurement, then measurement precision is improved, but loss of time and loss of substance increase due to human costs and installation requirements
Solution Approach 1:
The system performs preliminary action by projecting pattern light and detecting it to calculate the angle between surfaces before vibration measurement begins, automating the alignment process that would otherwise require time-consuming manual operations
Solution Approach 2:
The system serves itself by automatically performing the alignment function through optical detection and angle calculation, eliminating the need for human operators to perform manual alignment tasks and reducing both time and labor costs
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 vibration measurement of infrastructure elements without requiring manual alignment, reducing costs and operational complexity while maintaining precision.
Implementation Method 1
an optical apparatus that projects pattern light onto a measurement target surface of the structure
Implementation Method 2
an image capturing apparatus that shoots the measurement target surface; a detection unit that acquires, as a pattern image from the image capturing apparatus, an image of the measurement target surface onto which the pattern light is projected, and detects the projected pattern light from the pattern image
Data Source
AI summary
A vibration measurement apparatus 30 includes a detection unit 31 that acquires, as a pattern image from an image capturing apparatus 20 that shoots a measurement target surface of a structure 40, an image of the measurement target surface onto which pattern light is projected by an optical apparatus 10, and detects the pattern light from the pattern image, an estimation unit 32 that estimates an angle between the normal of the image capturing surface and the normal of the measurement target surface, based on the pattern light, an image conversion unit 33 that converts the shot image into an image that would be obtained were the normal of the measurement target surface coincident with the normal of the image capturing surface of the image capturing apparatus 20, using the estimated angle, and a vibration measurement unit 34 that measures the vibration of the structure 40 using the converted image.