This Standard prescribes methods for the performance evaluation of laser-based spherical coordinate measurement systems and provides a basis for performance comparisons among such systems. Definitions, environmental reguirements, and test methods are included with emphasis on point-to-point length measurements. The specified test methods are appropriate for the performance evaluation of a majority of such instruments and are not intended to replace more complete tests that may be required for special applications. This Standard establishes requirements and methods for specifying and testing the performance of a class of spherical coordinate measurement systems called laser trackers.¹ A laser tracker is an instrument that directs the light from a ranging device to a retroreflecting target (called a retroreflector) by means of a two-axis rotary steering mechanism while monitoring the angular position of these rotary axes, thereby forming a spherical coordinate metrology system. Such an instrument may measure a static target, track and measure a moving target, or measure (and perhaps track) some combination of static and moving targets. This Standard focuses specifically on the use of laser trackers as industrial measurement tools rather than their use in surveying or geodesy. Specified tests are designed to evaluate the point-to-point length measurement capabilities of these instruments. Additional tests are included that evaluate the range measurement capability of laser trackers equipped with absolute distance meters (ADMs). The tests do not evaluate workpiece thermal compensation capability and are not sensitive to spherically mounted retroreflector (SMR) imperfections.

PDF Catalog

PDF Pages	PDF Title
5	CONTENTS FIGURES TABLES MANDATORY APPENDIX NONMANDATORY APPENDICES
6	FOREWORD
7	COMMITTEE ROSTER
8	CORRESPONDENCE WITH THE B89 COMMITTEE
9	1 SCOPE 2 INTRODUCTION
10	3 SPECIFICATIONS AND RATED CONDITIONS 4 DEFINITIONS
13	5 TEST ENVIRONMENT 6 PERFORMANCE TESTS
14	6.1 General Requirements 6.2 Length Measurement System Tests 6.2.1 Realization of the Reference Length. 1 Laser Tracker Performance Evaluation Requirements
15	6.2.2 Measurement Practices and Procedures. 6.2.3 Failure to Satisfy MPE Requirements. 6.2.4 Horizontal Length Measurement System Tests.
16	6.2.5 Vertical Length Measurement System Tests. 6.2.6 Right Diagonal Length Measurement System Tests. 6.2.7 Left Diagonal Length Measurement System Tests. 2 Horizontal Length Measurement System Test 3 Vertical Length Measurement System Test
17	6.2.8 User-Selected Length Measurement System Tests. 4 Right Diagonal Length Measurement System Test 5 Left Diagonal Length Measurement System Test
18	6.3 Two-Face System Tests 6.3.1 Two-Face Test Procedure. 6.3.2 Failure to Satisfy MPE Requirements. 6.4 Ranging Tests 6.4.1 Reference Length Requirements. 6 Two-Face System Test Measurement
19	6.4.1.1 Failure to Satisfy MPE Requirements. 6.4.2 Interferometer IFM Ranging Tests. 7 Ranging Test
20	6.4.3 Absolute Distance Meter ADM Ranging Tests. 6.4.4 Long Reference Lengths for Ranging Tests. 6.4.4.1 Cosine Error. 1 Laser Tracker and Reference Interferometer Alignment
21	7 ANALYSIS OF PERFORMANCE EVALUATION TESTS 7.1 Evaluation of Length Measurement System Tests of Para. 6.2 7.2 Evaluation of Two-Face System Tests of Para. 6.3 7.3 Evaluation of Ranging Tests of Para. 6.4 7.3.1 Evaluation of IFM Ranging Tests.
22	7.3.2 Evaluation of ADM Ranging Tests. 7.4 Evaluation of Performance Tests 7.4.1 Example of Default Test Method. 2 Cosine Error Versus Offset C From Reference Line
24	7.4.2 Example of Alternative Test Method. 8 REFERENCES 3 Least Squares Line Fit to 12 Short Reference Lengths
27	I REFERENCE LENGTH TRACEABILITY I-1 GENERAL TRACEABILITY ISSUES I-2 REFERENCE LENGTH TRACEABILITY I-3 METROLOGICAL TERMINUS
29	A TRACEABILITY OF SUBSEQUENT MEASUREMENTS
30	B SPHERICALLY MOUNTED RETROREFLECTOR SMR TESTS B-1 INTRODUCTION B-2 DETERMINING CENTERING ERROR OF VERTEX OF SMR B-2.1 Lateral Centering B-2.2 Radial Centering
31	B-3 DIHEDRAL ANGLE ERRORS
33	B-4 POLARIZATION EFFECTS
34	C REFRACTIVE INDEX OF AIR C-1 INTRODUCTION C-2 PHASE REFRACTIVE INDEX C-3 GROUP REFRACTIVE INDEX C-4 EQUATIONS FOR REFRACTIVE INDEX OF AIR C-4.1 Simplified Equation for HeNe Laser Displacement Interferometers
35	C-5 REFRACTIVE INDEX UNCERTAINTY AND DISPLACEMENT MEASUREMENTS
37	D REFERENCE LENGTHS FOR LASER TRACKER SYSTEM TESTS D-1 INTRODUCTION D-2 REFERENCE LENGTH REALIZED USING CALIBRATED SCALE BAR D-2.1 Temperature Dependence of Reference Length D-2.2 Evaluation of Uncertainty in Reference Length D-2.3 Decision Rule for Deciding Conformance With MPE Specification
38	D-2.4 Example
39	D-3 REFERENCE LENGTH REALIZED USING TARGET NESTS ON FREESTANDING STRUCTURES D-3.1 Reference Length Uncertainty D-3.2 Uncertainty in Reference Length Due to Wavelength Compensation Errors
40	D-3.3 Example D-3.4 Stability of Reference Length Realized Using Target Support Structures
41	D-4 REALIZATION OF REFERENCE LENGTHS USING LASER RAIL SYSTEM D-4.1 Cosine Error D-4.2 Abbe Error D-4.3 Uncertainty Due to Wavelength Compensation Errors
43	D-4.4 Rail Stability D-4.5 Combined Standard Uncertainty of Reference Length
44	E EFFECT OF AIR TEMPERATURE ON LASER TRACKER MEASUREMENTS E-1 INTRODUCTION E-2 RADIAL AND TRANSVERSE ERRORS E-2.1 Equation for Radial Error
45	E-2.2 Equations for Transverse Error E-2.3 Example
47	E-3 UNAMBIGUOUS ENVIRONMENTAL SPECIFICATIONS
49	F LASER TRACKER INTERIM TESTING F-1 INTRODUCTION F-2 ENVIRONMENTAL CONSIDERATIONS F-3 FREQUENCY OF INTERIM TESTING F-4 DEFAULT TEST PROCEDURES F-4.1 Interim System Test 1
50	F-4.2 Interim System Test 2

Published By	Publication Date	Number of Pages
ASME	2006	52


PDF Format	Searchable	Printable	Preview Now

Standard Title	ASME B89.4.19 Performance Evaluation of Laser-Based Spherical Coordinate Measurement Systems – Reaffirmed: 2015
Published Code	ASME
Publication Date	2006
Pages Count	52

ASME B89.4.19 2006 R2015

PDF Catalog

Related products

ASME B89.1.17 2001 R2017

ASME B89.4.22 2004 R2014

ASME B89.4.22 2004 R2019

ASME B89.4.10 2000 R2011

ASME B89.1.9 2023