Damage Detection in Tires Using Image-Based Strain Measurements
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TECHNICAL ARTICLE—PEER-REVIEWED
Damage Detection in Tires Using Image-Based Strain Measurements Amanda C. Kotchon . Michael G. Lipsett . David S. Nobes
Submitted: 28 March 2016 Ó ASM International 2016
Abstract Tire failure in mining operations can be hazardous, resulting in financial and productivity losses. There are opportunities to improve tire monitoring systems by safely and remotely providing full-field measurements of tire properties. An optical fault detection system has been developed to investigate the feasibility of using digital image correlation to measure displacement and strain on a tire surface with the aim of detecting tire damage. This study defines metrics for damage visibility and examines the visibility of different damage types at multiple orientations in a laboratory setting. Internal and external damage was successfully detected from changes in surface strain. Knowledge gained from this investigation can be used to drive the future development of industrial tire monitoring solutions. Keywords Damage detection Optical fault detection system Digital image correlation Tire damage
Introduction Motivation Tires for excavation equipment, including haulage trucks, are subjected to rigorous demands, carrying loads up to 80 tons per tire while operating in temperatures ranging from ±40 °C. Typically, an ultra-class haul truck will have at least 6 tires, measuring up to 4 m in diameter and weighing *5300 kg, which represent a third or more of the A. C. Kotchon M. G. Lipsett (&) D. S. Nobes University of Alberta, Edmonton, AB T6G 1H9, Canada e-mail: [email protected]
operational cost of the vehicle [1]. During operation, haulage tires are at risk of puncture from ore and other obstructions and damage from adverse driving conditions such as snow and mud. Replacing a damaged tire takes between 4 h and 12 h and can impede or stall excavation. A limited supply of new tires is produced each year, imposing financial and productivity limitations on companies which exceed their given quota. There is a safety hazard to equipment and personnel when a tire fails. Altogether, this provides a strong motivation for improving the life span of these tires through inspection, monitoring, and maintenance. Current monitoring techniques include visual inspection by trained personnel, as well as temperature and pressure monitoring. While temperature and pressure monitoring can be automated and implemented remotely, visual inspection is currently limited by the availability of trained personnel. Conversely, while visual inspection can detect small cracks or localized tire damage, temperature and pressure monitoring can fail to detect highly localized damage or damage mechanisms that do not significantly affect temperature or pressure in the tire [2]. For these reasons, a project was commissioned by a Canadian mining company to examine alternative monitoring strategies for tires and improve the understanding of tire behavior in the presence of damage.
Solution Desired features for an inspection system inc
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