Improvements in the evaluation of parabolic trough solar collector using a dynamic flat null-screen

O. Huerta-Carranza; MANUEL CAMPOS-GARCIA; Daniel  Aguirre-Aguirre; Brenda Villalobos Mendoza; Víctor Iván Moreno Oliva

doi:https://doi.org/10.1117/12.2592804

Improvements in the evaluation of parabolic trough solar collector using a dynamic flat null-screen

O. Huerta-Carranza, MANUEL CAMPOS-GARCIA, Daniel Aguirre-Aguirre, Brenda Villalobos Mendoza, Víctor Iván Moreno Oliva

Departamento de Física y Matemáticas

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We use the null-screen method to evaluate in a qualitative and quantitative way the shape of a parabolic trough solar collector. When a parabolic trough solar collector is fabricated can occur that the manufacturing errors are large. In some cases, when using the null screen method, the objects in the image plane are overlapped. This problem is solved adequately by placing the CMOS sensor and LCD null-screen in off-axis positions. Also, we propose to display a suitable null-screen on the LCD screen. In the first evaluation the null screen is composed of few object points, in the next evaluation, we change the distribution of objects that compose the null screen with the aim of increasing the measurement points. Finally, the data corresponding to each evaluation is merged in only one set of evaluation data to calculate the surface sagitta from slope measurements of the test surface in the x and y directions.

Original language	English
Title of host publication	SPIE Digital Library Conference Proceedings
Subtitle of host publication	Optical Fabrication, Testing, and Metrology VII
Editors	Roland Geyl, Deitze Otaduy, Reinhard Volkel
Publisher	SPIE
Pages	20
ISBN (Electronic)	9781510645905
ISBN (Print)	0277-786X
DOIs	https://doi.org/10.1117/12.2592804
Publication status	Published - 12 Sept 2021

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11873
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Bibliographical note

Funding Information:
This research was supported by the Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México (DGAPA-UNAM) under the projects Programa de Apoyo a Proyectos de Investigación e Inovación Tecnológica (PAPIIT) No: TA100521 and IT100321.

Publisher Copyright:
© 2021 SPIE.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

https://doi.org/10.1117/12.2592804

Cite this

Huerta-Carranza, O., CAMPOS-GARCIA, MANUEL., Aguirre-Aguirre, D., Villalobos Mendoza, B., & Moreno Oliva, V. I. (2021). Improvements in the evaluation of parabolic trough solar collector using a dynamic flat null-screen. In R. Geyl, D. Otaduy, & R. Volkel (Eds.), SPIE Digital Library Conference Proceedings: Optical Fabrication, Testing, and Metrology VII (pp. 20). Article 118730J (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11873). SPIE. https://doi.org/10.1117/12.2592804

Huerta-Carranza, O. ; CAMPOS-GARCIA, MANUEL ; Aguirre-Aguirre, Daniel et al. / Improvements in the evaluation of parabolic trough solar collector using a dynamic flat null-screen. SPIE Digital Library Conference Proceedings: Optical Fabrication, Testing, and Metrology VII. editor / Roland Geyl ; Deitze Otaduy ; Reinhard Volkel. SPIE, 2021. pp. 20 (Proceedings of SPIE - The International Society for Optical Engineering).

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abstract = "We use the null-screen method to evaluate in a qualitative and quantitative way the shape of a parabolic trough solar collector. When a parabolic trough solar collector is fabricated can occur that the manufacturing errors are large. In some cases, when using the null screen method, the objects in the image plane are overlapped. This problem is solved adequately by placing the CMOS sensor and LCD null-screen in off-axis positions. Also, we propose to display a suitable null-screen on the LCD screen. In the first evaluation the null screen is composed of few object points, in the next evaluation, we change the distribution of objects that compose the null screen with the aim of increasing the measurement points. Finally, the data corresponding to each evaluation is merged in only one set of evaluation data to calculate the surface sagitta from slope measurements of the test surface in the x and y directions.",

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Huerta-Carranza, O, CAMPOS-GARCIA, MANUEL, Aguirre-Aguirre, D, Villalobos Mendoza, B & Moreno Oliva, VI 2021, Improvements in the evaluation of parabolic trough solar collector using a dynamic flat null-screen. in R Geyl, D Otaduy & R Volkel (eds), SPIE Digital Library Conference Proceedings: Optical Fabrication, Testing, and Metrology VII., 118730J, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11873, SPIE, pp. 20. https://doi.org/10.1117/12.2592804

Improvements in the evaluation of parabolic trough solar collector using a dynamic flat null-screen. / Huerta-Carranza, O.; CAMPOS-GARCIA, MANUEL; Aguirre-Aguirre, Daniel et al.
SPIE Digital Library Conference Proceedings: Optical Fabrication, Testing, and Metrology VII. ed. / Roland Geyl; Deitze Otaduy; Reinhard Volkel. SPIE, 2021. p. 20 118730J (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11873).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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N2 - We use the null-screen method to evaluate in a qualitative and quantitative way the shape of a parabolic trough solar collector. When a parabolic trough solar collector is fabricated can occur that the manufacturing errors are large. In some cases, when using the null screen method, the objects in the image plane are overlapped. This problem is solved adequately by placing the CMOS sensor and LCD null-screen in off-axis positions. Also, we propose to display a suitable null-screen on the LCD screen. In the first evaluation the null screen is composed of few object points, in the next evaluation, we change the distribution of objects that compose the null screen with the aim of increasing the measurement points. Finally, the data corresponding to each evaluation is merged in only one set of evaluation data to calculate the surface sagitta from slope measurements of the test surface in the x and y directions.

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Huerta-Carranza O, CAMPOS-GARCIA MANUEL, Aguirre-Aguirre D, Villalobos Mendoza B, Moreno Oliva VI. Improvements in the evaluation of parabolic trough solar collector using a dynamic flat null-screen. In Geyl R, Otaduy D, Volkel R, editors, SPIE Digital Library Conference Proceedings: Optical Fabrication, Testing, and Metrology VII. SPIE. 2021. p. 20. 118730J. (Proceedings of SPIE - The International Society for Optical Engineering). doi: https://doi.org/10.1117/12.2592804

Improvements in the evaluation of parabolic trough solar collector using a dynamic flat null-screen

Abstract

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Bibliographical note

All Science Journal Classification (ASJC) codes

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