The Interior Temperature Distribution Measurement in a Rolling Tire

Abstract

A new wireless temperature measurement system which aims to measure the interior temperature distribution in a rolling tire is presented. In the system, Negative Temperature Coefficient (NTC) thermistor of bead type was selected as the temperature sensor; while a RF Module (Transmitters & Receiver) was used to overcome the data transmission difficulty in rolling tires. Furthermore, to solve the unexpected sensor failure problem, two groups of thermistors, as substitutes for each other based on the hypothesis of uniform circumferential temperature, were placed at the same positions on two tire cross sections. The temperature distributions of both the inner wall and the tire cavity in the rolling tire were obtained. This effective and economical test method is able to obtain sufficient interior temperature information in rolling tires. The test results also confirm that there are no temperature gradients in tire circumferential direction.