Infrared Thermometry System for Temperature Measurement in Induction Heating Appliances

Imaz, Eduardo; Alonso, R.; Heras, Carlos; Salinas, Í.; Carretero, Enrique; Carretero, C.

doi:10.1109/tie.2013.2281166

Cited by 29 publications

(17 citation statements)

References 21 publications

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“…A detailed analysis of the theoretical background given in the following subsections can be found in [24]. …”

Section: Analysis Of Ir Temperature Sensormentioning

confidence: 99%

“…Assuming the independency with respect to the wavelength of the emissivity, the reflectance and the transmittance of the glass-ceramic and the cookware (grey body approach) in the region from 1,200 to 2,600 nm, the output voltage, S , due to the photo-current generated by a PIN can be expressed as [24]:

S = τ_{0} G \frac{d Ω}{π} A_{eff} [T {italicɛ}_{m} (1 + \frac{R (1 - {italicɛ}_{m})}{1 - R (1 - {italicɛ}_{m})}) f (T_{m}) + {italicɛ}_{g} (1 + \frac{T (1 - {italicɛ}_{m})}{1 - R (1 - {italicɛ}_{m})}) f (T_{g})]

where:

f (T) = \int_{1200}^{2600} E_{B B} (λ, T) ℜ (λ) d λ

and:

\begin{array}{l} left & A_{eff} = \frac{D}{d} A_{D}; & d Ω = \frac{A}{{(D + d)}^{2}} \end{array}

…”

Section: Analysis Of Ir Temperature Sensormentioning

confidence: 99%

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Infrared Sensor-Based Temperature Control for Domestic Induction Cooktops

Lasobras

Alonso

Carretero

et al. 2014

Sensors

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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.

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“…A detailed analysis of the theoretical background given in the following subsections can be found in [24]. …”

Section: Analysis Of Ir Temperature Sensormentioning

confidence: 99%

S = τ_{0} G \frac{d Ω}{π} A_{eff} [T {italicɛ}_{m} (1 + \frac{R (1 - {italicɛ}_{m})}{1 - R (1 - {italicɛ}_{m})}) f (T_{m}) + {italicɛ}_{g} (1 + \frac{T (1 - {italicɛ}_{m})}{1 - R (1 - {italicɛ}_{m})}) f (T_{g})]

where:

f (T) = \int_{1200}^{2600} E_{B B} (λ, T) ℜ (λ) d λ

and:

\begin{array}{l} left & A_{eff} = \frac{D}{d} A_{D}; & d Ω = \frac{A}{{(D + d)}^{2}} \end{array}

…”

Section: Analysis Of Ir Temperature Sensormentioning

confidence: 99%

Infrared Sensor-Based Temperature Control for Domestic Induction Cooktops

Lasobras

Alonso

Carretero

et al. 2014

Sensors

Self Cite

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“…First experiments have been focused on hot spot monitoring with scanning methodologies [24] or MIC's [25] to extract FoM calibration-free parameters in LNA's and PA's (i.e., power gain central frequency [24] or 3dB bandwidth [24], [25] implement heterodyne strategies over other solutions [18], [22], [23], [26], as the power dissipated by transistors or other IC parts inherently mixes current and voltage signals by Joule effect. To acquire in SoC's single-shot thermal images, InfraRed (IR) thermography is a good candidate, as frequencymodulated hot spots can be studied by lock-in detection (InfraRed Lock-In Thermography, IR-LIT) [27], [28], [29] with the following profits [30], [31]. The influence of either other spectral component of temperature different to the modulation frequency (i.e., DC or other Fourier components) or external noise sources are suppressed.…”

Section: Introductionmentioning

confidence: 99%

Output Power and Gain Monitoring in RF CMOS Class A Power Amplifiers by Thermal Imaging

Perpiñà

Reverter

León

et al. 2019

IEEE Trans. Instrum. Meas.

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 Abstract-The viability of using off-chip single-shot imaging techniques for local thermal testing in integrated Radio Frequency (RF) power amplifiers (PA's) is analyzed. With this approach, the frequency response of the output power and power gain of a Class A RF PA is measured, also deriving information about the intrinsic operation of its transistors. To carry out this case study, the PA is heterodynally driven, and its electrical behavior is down converted into a lower frequency thermal field acquirable with an InfraRed Lock-In Thermography (IR-LIT) system. After discussing the theory, the feasibility of the proposed approach is demonstrated and assessed with thermal sensors monolithically integrated in the PA. As crucial advantages to RF-testing, this local approach is noninvasive and demands less complex instrumentation than the mainstream commercially available solutions.

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“…Manara applied a long wavelength infrared radiation thermometer to measure the surface temperature of thermal barrier coatings during the operation of gas turbine engines [ 20 ]. Imaz designed an infrared thermometry system to measure the temperature of domestic induction heating cookers [ 21 ]. Feng analyzed the heat conduction performance of single-walled carbon nanotube thin films and measured the thermal conductance by infrared thermography [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Temperature Measurement Method for Blast Furnace Molten Iron Based on Infrared Thermography and Temperature Reduction Model

Pan

Jiang

Chen

et al. 2018

Sensors

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The temperature measurement of blast furnace (BF) molten iron is a mandatory requirement in the ironmaking process, and the molten iron temperature is significant in estimating the molten iron quality and control blast furnace condition. However, it is not easy to realize real-time measurement of molten iron temperature because of the harsh environment in the blast furnace casthouse and the high-temperature characteristics of molten iron. To achieve continuous detection of the molten iron temperature of the blast furnace, this paper proposes a temperature measurement method based on infrared thermography and a temperature reduction model. Firstly, an infrared thermal imager is applied to capture the infrared thermal image of the molten iron flow after the skimmer. Then, based on the temperature distribution of the molten iron flow region, a temperature mapping model is established to measure the molten iron temperature after the skimmer. Finally, a temperature reduction model is developed to describe the relationship between the molten iron temperature at the taphole and skimmer, and the molten iron temperature at the taphole is calculated according to the temperature reduction model and the molten iron temperature after the skimmer. Industrial experiment results illustrate that the proposed method can achieve simultaneous measurement of molten iron temperature at the skimmer and taphole and provide reliable temperature data for regulating the blast furnace.

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Infrared Thermometry System for Temperature Measurement in Induction Heating Appliances

Cited by 29 publications

References 21 publications

Infrared Sensor-Based Temperature Control for Domestic Induction Cooktops

Infrared Sensor-Based Temperature Control for Domestic Induction Cooktops

Output Power and Gain Monitoring in RF CMOS Class A Power Amplifiers by Thermal Imaging

Temperature Measurement Method for Blast Furnace Molten Iron Based on Infrared Thermography and Temperature Reduction Model

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