2006_2015.pdf

AN AMERICAN NATIO NAL STANDARDPerformance Evaluation of Laser-BasedSpherical Coordinate Measurement SystemsASME B89.4.19-2006REAFFIRMED 2015FOR CURRENT COMMITTEE PERSONNELPLEASE E-MAIL CSasme.orgIntentionally left blankASME B89.4.19-2006Performance Evaluationof Laser-BasedSpherical CoordinateMeasurement SystemsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY 10016Date of Issuance:November 30,2006The next edition of this Standard is scheduled for publication in 2011.There will be no addendaissued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Interpretations are published on the ASME website under the Committee Pages athttp:/cstools.asme.org as they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards.The Standards Committee that approved the code or standard was balanced to assure that individuals fromcompetent and concerned interests have had an opportunity to participate.The proposed code or standard was madeavailable forpublic review andcomment thatprovides an opportunityfor additional publicinput from industry,academia,regulatory agencies,and the public-at-large.ASME does not“approve,”“rate,”or“endorse”any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assumes any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and policies,which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue,New York,NY 10016-5990Copyright 2006 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B89 Committee.vi1Scope.12Introduction.13Specifications and Rated Conditions.24Definitions.25Test Environment.56Performance Tests.57Analysis of Performance Evaluation Tests.138References.16Figures1Laser Tracker and Reference Interferometer Alignment.122Cosine Error Versus Offset C From Reference Line.143Least Squares Line Fit to 12 Short Reference Lengths.16Tables1Laser Tracker Performance Evaluation Requirements.62Horizontal Length Measurement System Test.83Vertical Length Measurement System Test.84Right Diagonal Length Measurement System Test.95Left Diagonal Length Measurement System Test.96Two-Face System Test Measurement.107Ranging Test.11Mandatory AppendixIReference Length Traceability.19Nonmandatory AppendicesATraceability of Subsequent Measurements.21BSpherically Mounted Retroreflector(SMR)Tests.22CRefractive Index of Air.26DReference Lengths for Laser Tracker System Tests.29EEffect of Air Temperature on Laser Tracker Measurements.36FLaser Tracker Interim Testing.41iiiFOREWORDASME Standards Committee B89 on Dimensional Metrology,under procedures approved bythe American National Standards Institute(ANSI),prepares standards that encompass the inspec-tionandthe meansofmeasuringcharacteristics ofsuchvariousgeometricparameters asdiameter,length,flatness,parallelism,concentricity,and squareness.Division B89.4 produces Standards and Technical Reports in the area of coordinate measuringtechnology,with particular focus on coordinate measuring machines(CMMs).This Standard,addressing the performance evaluation of laser trackers and similar large-scale measurementsystems,is the work of the B89.4.19 Project Team on Optical CMM Evaluation.Performance evaluation of a laser tracker presents challenges different from those associatedwith conventional Cartesian CMMs.Because of the very large working volume,no full-scale,three-dimensional calibrated artifacts exist,and the design of the laser beam steering system issuch that individual parametric errors cannot,in general,be isolated and measured individually.Foranycoordinatemeasurementsystem,afundamentalrequirementisatestofitsabilitytorealizethe SI unit of length,the meter.In a laser tracker,the length scale is often a laser interferometer andusually one does not have a significantly more accurate reference interferometer with w