| Study on Measurement of Dynamic Contact Pressure Distribution of Tire by Optical Absorption Method |
| Received:July 22, 2021 Revised:July 22, 2021 |
| DOI：10.12136/j.issn.1000-890X.2022.10.0723 |
| Key Words: tire；dynamic contact pressure distribution；contact footprint；optical absorption method；test bench；image processing |
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| Abstract: |
| The test bench for the ground contact footprint image of the tire using optical absorption
method was designed，and the dynamic contact pressure distribution of the tire was obtained through image
processing algorithm under the control of inflation pressure，load，camber angle and slip angle.The image
processing algorithm was as follows：firstly the contact footprint image of the tire was taken，then the contact
area between the tire and the road surface in the image was obtained through image correction，gray-scaling，
filtering, denoising and image segmentation，the correlation between the image gray scale and the contact
pressure of the tire was established through the calibration mechanism，and the contact footprint image was
converted into the contact pressure distribution image of the tire.Taking an asymmetric pattern radial tire
with a specification of 205/55R16 as an example，the dynamic contact footprint of the tire was tested on the
test bench，and the contact pressure distribution and contact footprint characteristic value of the tire under
different working conditions were obtained.The absolute values of relative errors of the calculated load of the
tire were basically less than 10%，which verified the effectiveness of the optical test bench. |
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