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Visual Scanning Hartmann Optical Tester (VSHOT) uncertainty analysis / A. Gray, A. Lewandowski, and T. Wendelin.
- Format:
- Book
- Government document
- Author/Creator:
- Gray, Allison
- Series:
- NREL/TP ; 5500-48482.
- NREL/TP ; 5500-48482
- Language:
- English
- Subjects (All):
- Parabolic troughs--Testing.
- Uncertainty--Analysis.
- Reflective materials.
- Physical Description:
- 1 online resource (37 pages) : illustrations.
- Place of Publication:
- Golden, CO : National Renewable Energy Laboratory, [2010]
- Summary:
- In 1997, an uncertainty analysis was conducted of the Video Scanning Hartmann Optical Tester (VSHOT). In 2010, we have completed a new analysis, based primarily on the geometric optics of the system, and it shows sensitivities to various design and operational parameters. We discuss sources of error with measuring devices, instrument calibrations, and operator measurements for a parabolic trough mirror panel test. These help to guide the operator in proper setup, and help end-users to understand the data they are provided. We include both the systematic (bias) and random (precision) errors for VSHOT testing and their contributions to the uncertainty. The contributing factors we considered in this study are: target tilt; target face to laser output distance; instrument vertical offset; laser output angle; distance between the tool and the test piece; camera calibration; and laser scanner. These contributing factors were applied to the calculated slope error, focal length, and test article tilt that are generated by the VSHOT data processing.
- Notes:
- Title from title screen (NREL, viewed Nov. 1, 2010).
- "October 2010."
- Includes bibliographical references.
- OCLC:
- 676696456
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