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Flat Lens Metasurface Optics In Machine Vision Vehicle Service Systems

IP.com Disclosure Number: IPCOM000240886D
Publication Date: 2015-Mar-09
Document File: 4 page(s) / 296K

Publishing Venue

The IP.com Prior Art Database

Abstract

A machine vision vehicle service system incorporates ultra-thin flat lens metasurface optics in imaging sensors to reduce image distortions, provide an increase in measurement accuracy, and to simplify sensor manufacturing and calibration procedures.

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Flat Lens Metasurface Optics In Machine Vision Vehicle Service

Systems

March 9, 2015

ABSTRACT

  A machine vision vehicle service system incorporates ultra-thin flat lens metasurface optics in imaging sensors to reduce image distortions, provide an increase in measurement accuracy, and to simplify sensor manufacturing and calibration procedures.

DETAILED DESCRIPTION

  The present paper describes machine vision vehicle service systems, and in particular, vehicle service systems such as wheel alignment systems, vehicle wheel balancers, tire changers, and tire tread depth measurement systems which are configured with machine vision imaging sensors and associated optics. Image data acquired during a vehicle service procedure may be utilized for a variety of purposes during a vehicle service procedure, some of which require high degrees of precision.

  For example, a vehicle wheel alignment system may incorporate machine vision sensors to acquire images of vehicle wheels, vehicle components or support surfaces directly, or may acquire images of optical targets or projected illuminations associated with the wheels, components or support surfaces. Data extracted from the acquired images may be used to identify a linear distance to an observed object, or a position and orientation of an observed object in three-dimensional space, such as shown in U.S. Patent No. 5,724,128 to January. From the identified information, vehicle alignment measurements such as toe, caster, camber, and ride height can be determined to required degrees of accuracy by a suitably configured processing system.

    In a vehicle wheel balancer service system configured to measure imbalance forces in a wheel assembly secured to a spindle shaft, machine vision imaging sensors may be utilized to observe the surfaces of a wheel rim to acquire data which is representative of a wheel rim contour, installed imbalance correction weights, or an out-of-round condition. The surface may be illuminated by ambient light or by various patterns of projected light, such as shown in U.S. Patent No. 8,111,387 B2 to Douglas et al. Mapping the contour of the wheel rim surface facilitates identification of the ideal placement locations for imbalance correction weights on the vehicle wheel assembly.

  Tire changer service systems configured to facilitate the mounting or demounting of a tire to or from a wheel rim, may utilize machine vision imaging sensors to monitor the spatial position of, and relationships between, various moving tool components

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and the wheel rim or tire during mounting or demounting procedures, such as shown in U.S. Patent No. 7,495,755 B2 to Voeller et al. Wheel assemblies come in a wide variety of configurations and sizes, necessitating differing spatial placements of tire hooks, rollers or mount heads during tire mounting or demounting procedures to ensure proper automated operation and to avoid interfering movements. Using machine vision imaging sensors...