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Sensors 2017, 17(2), 285; doi:10.3390/s17020285

Camber Angle Inspection for Vehicle Wheel Alignments

Institute of Vehicle Engineering, National Changhua University of Education, Changhua County 50007, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: Simon X. Yang
Received: 10 November 2016 / Revised: 5 January 2017 / Accepted: 24 January 2017 / Published: 3 February 2017
(This article belongs to the Special Issue Sensors for Transportation)
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Abstract

This paper introduces an alternative approach to the camber angle measurement for vehicle wheel alignment. Instead of current commercial approaches that apply computation vision techniques, this study aims at realizing a micro-control-unit (MCU)-based camber inspection system with a 3-axis accelerometer. We analyze the precision of the inspection system for the axis misalignments of the accelerometer. The results show that the axes of the accelerometer can be aligned to the axes of the camber inspection system imperfectly. The calibrations that can amend these axis misalignments between the camber inspection system and the accelerometer are also originally proposed since misalignments will usually happen in fabrications of the inspection systems. During camber angle measurements, the x-axis or z-axis of the camber inspection system and the wheel need not be perfectly aligned in the proposed approach. We accomplished two typical authentic camber angle measurements. The results show that the proposed approach is applicable with a precision of ± 0.015 and therefore facilitates the camber measurement process without downgrading the precision by employing an appropriate 3-axis accelerometer. In addition, the measured results of camber angles can be transmitted via the medium such as RS232, Bluetooth, and Wi-Fi. View Full-Text
Keywords: accelerometer; camber angle; coordinate transformation; wheel alignment accelerometer; camber angle; coordinate transformation; wheel alignment
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Young, J.-S.; Hsu, H.-Y.; Chuang, C.-Y. Camber Angle Inspection for Vehicle Wheel Alignments. Sensors 2017, 17, 285.

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