Device for testing contact stress between tire and road surface based on magnetic manometer heat image

Abstract

The invention relates to a device for testing the contact stress between a tire and a road surface based on a magnetic manometer heat image and is applied to the field of road stress testing. The device comprises a stress induction panel, an outer magnetic field exciting system and an induction magnetic field testing system. The stress induction panel is made of non-ferromagnetic metal materials and is in a rectangular panel shape, and magnetic nano-particles with superparamagnetism are welded or bonded to the upper surface of the panel. The outer magnetic field exciting system is used for applying a constant or alternating magnetic field to the induction panel, and the induction magnetic field testing system is used for measuring the magnetization intensity of the magnetic nano-particles under the excitation of an outer magnetic field. Compared with a traditional tire ground pressure measuring method and device, the device can test the tire ground pressure under a running state, the stress distribution state of the contact between the tire and the ground can be directly reflected, and the accurate degree is high.

Description

technical field [0001] The invention is applied in the field of road stress testing, and relates to a new stress testing device, which is especially suitable for testing the stress distribution of the tire-road surface contact surface. Background technique [0002] The transportation industry is the basic industry of my country's social and economic development. With the rapid development of my country's economy, the traffic load is highlighted by the characteristics of large traffic volume, increased vehicle load, and accelerated vehicle speed. There are also higher requirements. The design load of the asphalt pavement adopts the static load uniformly distributed vertically in double circles as the external force load of the structure. The design and operation conditions of the pavement are very different from the actual operation conditions of the pavement, which makes the actual force distribution test of the road very urgent. [0003] Traditional tire contact pressure me...

AI Technical Summary

Problems solved by technology

These test methods either have low accuracy, or cannot test the ground contact pressure of the tire in the driving state, or can only test the force vertical to the ground, cannot test the three-way force, or cannot obtain the contact print of the tire, and most of the methods have both the above problems two to three, and none of the above methods can directly reflect the stress distribution of the tire in contact with the ground

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