title: Infrared sensor-based temperature control for domestic induction cooktops.
abstract: In this paper, a precise real-time temperature control system based on infrared (IR) thermometry for domestic induction cooking is presented. The temperature in the vessel constitutes the control variable of the closed-loop power control system implemented in a commercial induction cooker. A proportional-integral controller is applied to establish the output power level in order to reach the target temperature. An optical system and a signal conditioning circuit have been implemented. For the signal processing a microprocessor with 12-bit ADC and a sampling rate of 1 Ksps has been used. The analysis of the contributions to the infrared radiation permits the definition of a procedure to estimate the temperature of the vessel with a maximum temperature error of 5 °C in the range between 60 and 250 °C for a known cookware emissivity. A simple and necessary calibration procedure with a black-body sample is presented.
authors.affiliation: Applied Physics Department, University of Zaragoza, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain. lasobras@unizar.es.
authors.forename: Javier
authors.initials: J
authors.lastname: Lasobras
authors.affiliation: Applied Physics Department, University of Zaragoza, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain. ralonso@unizar.es.
authors.forename: Rafael
authors.initials: R
authors.lastname: Alonso
authors.affiliation: Applied Physics Department, University of Zaragoza, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain. ccar@unizar.es.
authors.forename: Claudio
authors.initials: C
authors.lastname: Carretero
authors.affiliation: Applied Physics Department, University of Zaragoza, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain. ecarre@unizar.es.
authors.forename: Enrique
authors.initials: E
authors.lastname: Carretero
authors.affiliation: Global Cooking Product Division, Induction Cooktop Development, Bosch and Siemens Home Appliances Group, Avenida de la Industria, 49, 50016 Zaragoza, Spain. Eduardo.Imaz@bshg.com.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Imaz
mesh_terms: D000669:Amplifiers, Electronic; D002138:Calibration; D003296:Cooking / Q000295:instrumentation*; D004560:Electricity; D006794:Household Articles; D007259:Infrared Rays; D055096:Optical Devices; D012984:Software; D013696:Temperature