ASTM_E_2938_-_15.pdf

Designation:E293815Standard Test Method forEvaluating the Relative-Range Measurement Performance of3D Imaging Systems in the Medium Range1This standard is issued under the fixed designation E2938;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This standard describes a quantitative test method forevaluating the range measurement performance of laser-based,scanning,time-of-flight,3D imaging systems in the mediumrange.The term“medium range”refers to systems that arecapable of operating within at least a portion of ranges from 2to 150 m.The term“time-of-flight systems”includes phase-based,pulsed,and chirped systems.The word“standard”inthis document refers to a documentary standard as per Termi-nology E284.This test method only applies to 3D imagingsystems that are capable of producing a point cloud represen-tation of a measured target.1.1.1 As defined in Terminology E2544,a range is thedistance measured from the origin of a 3D imaging system toa point in space.This range is often referred to as an absoluterange.However,since the origin of many 3D imaging systemsis either unknown or not readily measurable,a test method forabsolute range performance is not feasible for these systems.Therefore,in this test method,the range is taken to be thedistance between two points in space on a line that passesthrough the origin of the 3D imaging system.Although theerror in the calculated distance between these two points is arelative-range error,in this test method when the term rangeerror is used it refers to the relative-range error.This testmethod cannot be used to quantify the constant offset errorcomponent of the range error.1.1.2 This test method recommends that the first point be atthe manufacturer-specified target 1 range and requires that thesecond target be on the same side of the instrument under test(IUT)as the first target.Specification of target 1 range by themanufacturer minimizes the contribution to the relative rangemeasurement error from the target 1 range measurement.1.1.3 This test method may be used once to evaluate the IUTfor a given set of conditions or it may be used multiple timesto better assess the performance of the IUT for variousconditions(forexample,additionalranges,variousreflectances,environmental conditions).1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.SI units are used for all calculations and results in thisstandard.1.3 The method described in this standard is not intended toreplace more in-depth methods used for instrument calibrationor compensation,and specific measurement applications mayrequire other tests and analyses.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Some aspects of thesafe use of 3D Imaging Systems are discussed in PracticeASTM E2641.2.Referenced Documents2.1 ASTM Standards:2E284 Terminology of AppearanceE1164 Practice for Obtaining Spectrometric Data for Object-Color EvaluationE1331 Test Method for Reflectance Factor and Color bySpectrophotometry Using Hemispherical GeometryE2544 Terminology for Three-Dimensional(3D)ImagingSystemsE2641 Practice for Best Practices for SafeApplication of 3DImaging Technology2.2 ASME Standards:3ASME B89.1.9-2002 Gage BlocksASME B89.4.19-2006 Performance Evaluation of Laser-Based Spherical Coordinate Measurement SystemsASME B89.7.2-1999 Dimensional Measurement Planning1This test method is under the jurisdiction of ASTM Committee E57 on 3DImaging Systems and is the direct responsibility of Subcommittee E57.02 on TestMethods.Current edition approved April 1,2015.Published June 2015.DOI:10.1520/E293815.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Two Park Ave.,New York,NY 10016-5990,http:/www.asme.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.3 ISO Standards:4ISO 14253-1:1998 Geometrical Product Specifications(GPS)Inspection by measurement of workpieces andmeasuring equipmentPart 1:Decision rules for provingconformance or non-conformance with specificationsISO 14253-2:1999 Geometrical Product Specifications(GPS)Inspection by measurement of workpieces andmeasuring equipmentPart 2:Guide to the estimation ofuncertainty in GPS measurement,in