| Experimental Study on Tire-Pavement Contact Phenomenon Based on Optical Method |
| Received:March 04, 2020 Revised:March 04, 2020 |
| DOI：10.12136/j.issn.1000-890X.2020.10.0787 |
| Key Words: tire-pavement contact；optical principle；optical pressure measurement；grounding pressure distribution；test bench；image segmentation algorithm |
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| Abstract: |
| The test bench for measuring the grounding pressure distribution of the tires was designed based on the optical principle of total light reflection.Factors affecting the test bench calibration，including camera system，ambient light and calibration materials were studied.In order to accurately obtain the boundary of the tire grounding pressure distribution，a variety of image segmentation algorithm were compared，and the contact region between the tire and glass and the non-contact region in the picture were effectively segmented by joint segmentation optimized algorithm.The grounding pressure distribution obtained by optical method was compared with that of Tekscan pressure sensor.The results showed that the tire grounding pressure distribution characteristic index obtained by the optical method was highly consistent with that obtained by Tekscan pressure sensor，which proved the reliability of the optical method.On this basis，the dynamic ground pressure distribution of the tire was studied. |
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