Based on over three decades of research and experience, L-Ray based in Michigan developed the Differometric Digital Tire Test Machine (Figure 1) that can safely and efficiently testing tires at high volumes and speeds. With this machine, L-Ray is able to address several challenges, including prolonged tire testing times, space constraints, high production costs, and obscure results.
Figure 1. L-Ray Differometric Digital Tire Test Machine Featuring Lumenera CCD Camera.
Tire testing by the conventional standard utilizing shearography may take up to 20 minutes and cost up to $10 per tire. Moreover, shearography generated obscure results as all tire anomalies seen as laterally displaced pictures and could not be interpreted. Hence, L-Ray needed a new, non-destructive system capable of testing tires quickly at a lower cost. For this system, L-Ray was seeking an imaging component that can provide rapid motion imaging with easy-to-interpret, precise pictures and thus selected a Lumenera megapixel USB 2.0 camera with a CCD sensor.
Advantages of Lumenera CCD Camera
Figure 2. Lumenera’s Lu105m-CS-WOIR camera used in the Differometric Digital Tire Test Machine.
The Differometric Digital Tire Test Machine took many years and several million dollars to get finalized and deployed. This tire testing method is the future for both laboratory and factory floor tire testing. The selection of Lumenera CCD camera (Figure 2) enables L-Ray to realize the following benefits:
- Lumenera's high quality images enable the tire-testing equipment to display clear results and differentiate any anomalies, particularly where the anomaly actually lies in addition to its size and intensity.
- Proprietary algorithms process the discrepancies between the images into an easy-to-interpret output, thereby enabling automated rejection of defective tires.
- The use of the latest technology, including Lumenera's high quality and performance cameras, considerably reduces testing time from 20 minutes down to 60 or 70 seconds.
- The use of four cameras in place of just one, proprietary algorithms, and 16 laser diodes in place of a single light source leads to easy-to-interpret results.
- Testing cost is lowered to below 50 cents in comparison with the $10/tire as charged in the past. When development of the new tire tester started in 2000, the component cost was roughly $100,000. A sharp decline in the cost of today's sophisticated solutions has reduced the cost of components to just a few thousand dollars.
- Using a digital CCD camera with improved use of optics, light and reflection, this equipment provides results in real time.
- Lumenera's small form-factor enables fitting four cameras inside a tire. With carefully designed optics, each camera is able to capture precise images of the inside quadrant of the tire.
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This information has been sourced, reviewed and adapted from materials provided by Lumenera Corporation.
For more information on this source, please visit Lumenera Corporation.