Vibration Measurement System Using Inclination Sensor and Image Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibration measurement systems for infrastructure elements face challenges in achieving high accuracy without requiring manual operations, as they need to account for non-parallel image capturing and target surfaces, which incurs significant human, time, and monetary costs due to the need for manual marker placement.
Innovation Solution
A vibration measurement system that includes an image capturing apparatus, a distance measuring apparatus, and a sensor to calculate the angle between the image capturing surface and the target surface, allowing for automatic image conversion and vibration measurement using the calculated angle and measured distance, eliminating the need for manual alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If markers are manually attached to the infrastructure element to enable accurate vibration measurement without direct facing arrangement, then measurement precision is improved, but device complexity and human costs increase
Solution Approach 1:
The patent extracts and removes the markers from the measurement system, making the vibration measurement apparatus independent of any attached markers on the infrastructure element. This eliminates the need for manual marker attachment while maintaining measurement capability through image processing of the infrastructure element's surface features
Solution Approach 2:
The infrastructure element itself serves as the measurement target without requiring external markers. The system utilizes the natural surface features of the infrastructure element for image capture and vibration analysis, making the element self-sufficient for the measurement process
2Ease of operation
If image capturing apparatus is manually installed to enable vibration measurement, then ease of operation is improved, but measurement precision deteriorates due to difficulty in accurate alignment
Solution Approach 1:
The system incorporates a sensor that detects the inclination angle of the image capturing apparatus and provides feedback to an angle calculation unit. This feedback mechanism allows the system to automatically calculate and compensate for misalignment angles, maintaining measurement precision even when the apparatus is manually installed without precise alignment
Solution Approach 2:
The system changes the parameter of interest from absolute alignment to relative angle measurement. By calculating the angle between the image capturing surface normal and the infrastructure element surface normal, the system transforms the alignment problem into an angular parameter that can be measured and compensated through image conversion
3Measurement precision
If image capturing apparatus and target surface are arranged directly facing each other for accurate measurement, then measurement precision is improved, but ease of operation deteriorates due to installation difficulty on non-flat surfaces
Solution Approach 1:
The system transitions from requiring two-dimensional parallel alignment to utilizing three-dimensional angular relationships. By measuring and compensating for the angle between normals in three-dimensional space, the system allows flexible installation positions while maintaining measurement accuracy through coordinate system transformation
Data Source
AI summary
A vibration measurement system comprises an image capturing apparatus, a distance measuring apparatus, a sensor that outputs a signal according to an inclination of the image capturing apparatus relative to the vertical direction, and a vibration measurement apparatus. The vibration measurement apparatus includes calculating an angle formed by the normal of an image capturing surface of the image capturing apparatus and the normal of the measurement target surface that the image capturing apparatus shoots, based on the signal output by the sensor, converting the image obtained that the image capturing apparatus shoots 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, using the calculated angle, and measuring vibration of the structure, using the converted image and the measured distance from the image capturing apparatus to the measurement target surface.