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En el instante 11 de octubre de 2025, 1:23:31 UTC,
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Añadido recurso Automated dimensional synthesis of a portable sky scanner for measuring light pollution a Automated dimensional synthesis of a portable sky scanner for measuring light pollution
f | 1 | { | f | 1 | { |
2 | "author": "A Rios, EE Hern\u00e1ndez, H Lamphar, SI Valdez", | 2 | "author": "A Rios, EE Hern\u00e1ndez, H Lamphar, SI Valdez", | ||
3 | "author_email": null, | 3 | "author_email": null, | ||
4 | "creator_user_id": "a3da3ec9-3fd4-47a4-8d04-0a90b09614e0", | 4 | "creator_user_id": "a3da3ec9-3fd4-47a4-8d04-0a90b09614e0", | ||
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17 | "description": "Este grupo integra las publicaciones | 17 | "description": "Este grupo integra las publicaciones | ||
18 | acad\u00e9micas derivadas de los proyectos de investigaci\u00f3n del | 18 | acad\u00e9micas derivadas de los proyectos de investigaci\u00f3n del | ||
19 | Observatorio Metropolitano CentroGeo. Incluye art\u00edculos | 19 | Observatorio Metropolitano CentroGeo. Incluye art\u00edculos | ||
20 | presentados en congresos nacionales e internacionales, manuscritos en | 20 | presentados en congresos nacionales e internacionales, manuscritos en | ||
21 | formato preprint, cap\u00edtulos de libro y trabajos publicados en | 21 | formato preprint, cap\u00edtulos de libro y trabajos publicados en | ||
22 | revistas cient\u00edficas especializadas. Estos materiales reflejan la | 22 | revistas cient\u00edficas especializadas. Estos materiales reflejan la | ||
23 | labor de investigaci\u00f3n, desarrollo metodol\u00f3gico y | 23 | labor de investigaci\u00f3n, desarrollo metodol\u00f3gico y | ||
24 | an\u00e1lisis territorial del observatorio, contribuyendo al avance | 24 | an\u00e1lisis territorial del observatorio, contribuyendo al avance | ||
25 | del conocimiento en temas urbanos, metropolitanos y geoespaciales.", | 25 | del conocimiento en temas urbanos, metropolitanos y geoespaciales.", | ||
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39 | "metadata_created": "2025-10-11T01:23:30.924126", | 39 | "metadata_created": "2025-10-11T01:23:30.924126", | ||
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41 | "name": | 41 | "name": | ||
42 | of-a-portable-sky-scanner-for-measuring-light-pollution-1576a0510228", | 42 | of-a-portable-sky-scanner-for-measuring-light-pollution-1576a0510228", | ||
43 | "notes": "Light pollution is often measured by a photometric sensor | 43 | "notes": "Light pollution is often measured by a photometric sensor | ||
44 | network distributed in the area of interest. However, photometric | 44 | network distributed in the area of interest. However, photometric | ||
45 | sensors usually have a narrow view angle, making difficult to perform | 45 | sensors usually have a narrow view angle, making difficult to perform | ||
46 | measurements at low elevation angles. Furthermore, short-term | 46 | measurements at low elevation angles. Furthermore, short-term | ||
47 | variations are not significant; hence, a low-cost solution is to | 47 | variations are not significant; hence, a low-cost solution is to | ||
48 | displace a portable device, able to scan the sky in a range of azimuth | 48 | displace a portable device, able to scan the sky in a range of azimuth | ||
49 | and zenith angles, to different locations of interest. The device | 49 | and zenith angles, to different locations of interest. The device | ||
50 | should be designed with the aim of characterizing the emission | 50 | should be designed with the aim of characterizing the emission | ||
51 | function from ground based light sources, which is decreasing in | 51 | function from ground based light sources, which is decreasing in | ||
52 | intensity with respect to the zenith. In this manuscript, we propose | 52 | intensity with respect to the zenith. In this manuscript, we propose | ||
53 | to find the dimensions of a fourbar linkage mechanism that best fits | 53 | to find the dimensions of a fourbar linkage mechanism that best fits | ||
54 | the scanning task via an optimization problem, solved with an | 54 | the scanning task via an optimization problem, solved with an | ||
55 | estimation of distribution algorithm. The optimization algorithm | 55 | estimation of distribution algorithm. The optimization algorithm | ||
56 | proposes configurations with different lengths and reference positions | 56 | proposes configurations with different lengths and reference positions | ||
57 | of four-bar linkage mechanisms; then, it measures the distance between | 57 | of four-bar linkage mechanisms; then, it measures the distance between | ||
58 | points in the actual path and points in the desired path for each | 58 | points in the actual path and points in the desired path for each | ||
59 | configuration. The objective function value is the sum of such | 59 | configuration. The objective function value is the sum of such | ||
60 | distances; thus, the optimal design produces the minimum distance to | 60 | distances; thus, the optimal design produces the minimum distance to | ||
61 | the desired path. This proposal for automated design reduces the | 61 | the desired path. This proposal for automated design reduces the | ||
62 | working time and experience requirements of a human designer, and | 62 | working time and experience requirements of a human designer, and | ||
63 | trial-and-error design intends, by determining adequate dimensions for | 63 | trial-and-error design intends, by determining adequate dimensions for | ||
64 | the mechatronic system. A CAD model and a simulation demonstrate the | 64 | the mechatronic system. A CAD model and a simulation demonstrate the | ||
65 | design feasibility and the high accuracy of the resulting device.", | 65 | design feasibility and the high accuracy of the resulting device.", | ||
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91 | "description": "Light pollution is often measured by a | ||||
92 | photometric sensor network distributed in the area of interest. | ||||
93 | However, photometric sensors usually have a narrow view angle, making | ||||
94 | difficult to perform measurements at low elevation angles. | ||||
95 | Furthermore, short-term variations are not significant; hence, a | ||||
96 | low-cost solution is to displace a portable device, able to scan the | ||||
97 | sky in a range of azimuth and zenith angles, to different locations of | ||||
98 | interest. The device should be designed with the aim of characterizing | ||||
99 | the emission function from ground based light sources, which is | ||||
100 | decreasing in intensity with respect to the zenith. In this | ||||
101 | manuscript, we propose to find the dimensions of a fourbar linkage | ||||
102 | mechanism that best fits the scanning task via an optimization | ||||
103 | problem, solved with an estimation of distribution algorithm. The | ||||
104 | optimization algorithm proposes configurations with different lengths | ||||
105 | and reference positions of four-bar linkage mechanisms; then, it | ||||
106 | measures the distance between points in the actual path and points in | ||||
107 | the desired path for each configuration. The objective function value | ||||
108 | is the sum of such distances; thus, the optimal design produces the | ||||
109 | minimum distance to the desired path. This proposal for automated | ||||
110 | design reduces the working time and experience requirements of a human | ||||
111 | designer, and trial-and-error design intends, by determining adequate | ||||
112 | dimensions for the mechatronic system. A CAD model and a simulation | ||||
113 | demonstrate the design feasibility and the high accuracy of the | ||||
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138 | "title": "Automated dimensional synthesis of a portable sky scanner | 185 | "title": "Automated dimensional synthesis of a portable sky scanner | ||
139 | for measuring light pollution", | 186 | for measuring light pollution", | ||
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