Particle Image Velocimetry Using Multi-Color Laser Diodes
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Solution Overview
Problem
Particle image velocimetry systems are expensive and difficult to set up due to the need for specialized equipment, making them impractical for widespread use and portability.
Innovation Solution
A compact and cost-effective particle image velocimetry system utilizing a light source unit with multiple colored light sources, a camera, and a controller to calculate velocity by splitting images and determining time differences, allowing for low-cost manufacturing and easy portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional PIV systems use specialized cameras and lasers, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces expensive specialized PIV cameras and lasers with inexpensive industrial cameras and laser diodes. The system achieves acceptable measurement precision using low-cost components that are widely available, thereby reducing device complexity and cost while maintaining functional capability for velocity measurement
Solution Approach 2:
The patent changes the operational parameters by using continuous or pulsed illumination from multiple light sources instead of traditional pulsed laser sheets. This parameter change allows the use of standard industrial cameras with global shutter function, simplifying the system while maintaining measurement capability
2Measurement precision
If traditional PIV systems use specialized equipment, then measurement precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent substitutes expensive specialized equipment with inexpensive commercial off-the-shelf components. Industrial cameras and laser diodes are mass-produced items that are easy to manufacture and integrate, dramatically improving ease of manufacture while keeping measurement precision adequate for practical applications
Solution Approach 2:
The system uses universal industrial cameras with global shutter function that can be found in various applications, rather than specialized PIV cameras. This universality makes the system easier to manufacture as components are readily available and can be integrated using standard procedures
3Measurement precision
If traditional PIV systems use specialized cameras and lasers, then measurement precision is improved, but portability deteriorates
Solution Approach 1:
The patent replaces heavy specialized PIV equipment with lightweight industrial cameras and laser diodes. These components are significantly lighter and can be housed in compact enclosures, making the system portable while maintaining adequate measurement precision for field applications
Solution Approach 2:
The patent combines multiple light sources and the camera into a single integrated housing, creating a compact portable unit. This merging of components reduces the overall system size and weight, enabling portability while maintaining measurement precision through coordinated operation of the integrated components
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
The system enables accurate velocity measurement of flow fields using low-price industrial cameras and laser diodes, resulting in a portable and user-friendly device with a single-body structure, overcoming the limitations of traditional PIV systems.
Implementation Method 1
a light source unit including two or more light sources that generate lights of different colors, wherein each of the light sources irradiates tracking particles
Implementation Method 2
a camera that captures an image of the tracking particles
Data Source
AI summary
Provided are a particle image velocimetry and a method of controlling the particle image velocimetry. The particle image velocimetry includes a light source unit including two or more light sources that generate lights of different colors, wherein each of the light sources irradiates tracking particles in a flow field with a predetermined time difference; a camera that captures an image of the tracking particles; a controller that calculates migration distances of the tracking particles by splitting an image of the tracking particles captured by using the camera, into an image of each color, and calculates a velocity of the flow field by using the time difference at which the light of each of the light sources is irradiated and the migration distances of the tracking particles; and a display unit that receives velocity information of the flow field from the controller to display the velocity information.