Vibration and Sound Source Image Superimposition for Noise Analysis
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Solution Overview
Problem
The inspection target may generate noise due to vibration, and it is necessary to identify the vibration causing the noise to effectively suppress it.
Innovation Solution
An analysis device and method that visualize the correlation between vibration and noise of an inspection target by generating vibration and sound source images based on image and sound data, and extracting the natural vibration frequency associated with the noise to superimpose the images for analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vibration measurement and sound pressure measurement are performed separately, then measurement precision is improved, but loss of information occurs because the correlation between vibration and noise cannot be identified
Solution Approach 1:
The patent combines vibration image data and sound source image data into a single integrated analysis framework. By superimposing vibration images at different natural vibration frequencies with sound source images, the system preserves the correlation information between vibration and noise while maintaining measurement precision, directly resolving the technical contradiction.
2Measurement precision
If multiple natural vibration frequencies are analyzed simultaneously, then identification accuracy of noise-causing vibration is improved, but device complexity increases due to multiple image generation and comparison operations
Solution Approach 1:
The patent generates vibration images for multiple natural vibration frequencies (excessive action) but only superimposes and analyzes those that correspond to sound source frequencies. This approach maintains high identification accuracy by examining all potential frequencies while avoiding unnecessary complexity by selectively processing only relevant cases.
3Ease of operation
If superimposition of vibration image and sound source image is performed, then ease of operation is improved by visualizing correlation, but device complexity increases due to additional image processing requirements
Solution Approach 1:
The patent uses temporary, frequency-specific vibration images and sound source images that are generated, superimposed, and then discarded. Each frequency pair produces a disposable analysis result that directly indicates whether correlation exists, providing ease of operation without requiring complex persistent data structures or long-term storage systems.
Data Source
AI summary
An analysis device includes: a vibration image generation unit configured to generate, based on an image in which an inspection target is photographed, a vibration image visualizing a vibration level per region of the inspection target on the image at a first natural vibration frequency at which a peak of the vibration level appears; a sound source image generation unit configured to generate, based on recorded sound data of the inspection target recorded simultaneously with the image, a sound source image visualizing a sound pressure level per region on the image; an extraction unit configured to extract the first natural vibration frequency included within a predetermined range from a second natural vibration frequency at which a peak of the sound pressure level of the noise appears; and an analysis image generation unit configured to generate an analysis image in which the vibration image corresponding to the first natural vibration frequency extracted and the sound source image are superimposed.