Infrared Sensor-Based Temperature Control for Domestic Induction Cooktops

Sensors

Javier Lasobras¹  Rafael Alonso¹  Claudio Carretero¹  Enrique Carretero¹ 

[1] Applied Physics Department, University of Zaragoza, C/Pedro Cerbuna, 12, 50009 Zaragoza, Spain; E-Mails:

关键词: non-contact temperature measurement;    infrared sensor;    radiation detector;    induction heating;    temperature control;   

DOI  :  10.3390/s140305278

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.