title: Development of modulated optical transmission system to determinate the cloud and freezing points in biofuels.
abstract: This work is focused in the development of a modulated optical transmission system with temperature control to determine the thermal properties of biodiesels such as the cloud and freezing points. This system is able to determine these properties in real time without relying on the operator skills as indicated in the American Society for Testing Materials (ASTM) norms. Thanks to the modulation of the incident laser, the noise of the signal is reduced and two information channels are generated: amplitude and phase. Lasers with different wavelengths can be used in this system but the sample under study must have optical absorption at the wavelength of the laser.
authors: Departamento de Mecatrónica, Instituto Tecnológico Nacional, Sede Querétaro, Av. Tecnológico s/n, Col. Centro, Querétaro, Qro., Mexico.
authors: Liliana
authors: L
authors: Jaramillo-Ochoa
authors: Posgrado en Ciencia e Ingeniería de Materiales, Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Campus Juriquilla, Boulevard Juriquilla 3001, A.P. 1-1010, C.P. 76230 Juriquilla, Qro., Mexico.
authors: Cristian F
authors: CF
authors: Ramirez-Gutierrez
authors: División de Investigación y Posgrado, Facultad de Ingeniería, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n., C.P. 76010 Querétaro, Qro., Mexico.
authors: Alonso
authors: A
authors: Sánchez-Moguel
authors: Instituto Tecnológico Nacional, Sede Veracruz, Veracruz, Mexico.
authors: Andrés
authors: A
authors: Acosta-Osorio
authors: Departamento de Nanotecnología, Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Campus Juriquilla, Boulevard Juriquilla 3001, A.P. 1-1010, C.P. 76230 Juriquilla, Qro., Mexico.
authors: Mario E
authors: ME
authors: Rodriguez-Garcia
mesh_terms: D000273:Adipose Tissue / Q000737:chemistry; D000818:Animals; D056804:Biofuels; D002645:Chickens; D004867:Equipment Design; D007834:Lasers; D009821:Oils / Q000737:chemistry; D055096:Optical Devices; D044367:Phase Transition; D013057:Spectrum Analysis; D044366:Transition Temperature; D014867:Water / Q000737:chemistry
chemical_list: D056804:Biofuels; D009821:Oils; D014867:Water