Abstract
| Original language | English |
|---|---|
| Title of host publication | Proceedings |
| Subtitle of host publication | 2nd Electronics Systemintegration Technology Conference, ESTC 2008 |
| Place of Publication | London |
| Publisher | IEEE Institute of Electrical and Electronic Engineers |
| Pages | 809-814 |
| ISBN (Print) | 978-1-4244-2813-7, 978-1-4244-2814-4 |
| DOIs | |
| Publication status | Published - 2008 |
| MoE publication type | A4 Article in a conference publication |
| Event | 2nd Electronics System-Integration Technology Conference, ESTC 2008 - Greenwich, United Kingdom Duration: 1 Sep 2008 → 4 Sep 2008 |
Conference
| Conference | 2nd Electronics System-Integration Technology Conference, ESTC 2008 |
|---|---|
| Abbreviated title | ESTV 2008 |
| Country | United Kingdom |
| City | Greenwich |
| Period | 1/09/08 → 4/09/08 |
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Keywords
- Temperature
- infrared measurement sensor
- mobile device
- calibration
Cite this
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Improved infrared temperature sensing system for mobile devices. / Keränen, Kimmo; Mäkinen, Jukka-Tapani; Korhonen, Pentti; Juntunen, Eveliina; Heikkinen, Veli; Mäkelä, Jakke.
Proceedings: 2nd Electronics Systemintegration Technology Conference, ESTC 2008. London : IEEE Institute of Electrical and Electronic Engineers , 2008. p. 809-814.Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
TY - GEN
T1 - Improved infrared temperature sensing system for mobile devices
AU - Keränen, Kimmo
AU - Mäkinen, Jukka-Tapani
AU - Korhonen, Pentti
AU - Juntunen, Eveliina
AU - Heikkinen, Veli
AU - Mäkelä, Jakke
N1 - Project code: 21585
PY - 2008
Y1 - 2008
N2 - An infrared (IR) temperature measurement system consists of not only a sensor module and electronics, but also an optomechanical system that guides IR radiation onto the sensor. The geometry and emissivity of the parts affects the reading, if the detector sees not only the target but parts of the measuring system itself. In normal industrial applications, the optics is designed so that the surfaces stabilize to the same temperature as the sensor. This allows the error caused by the device temperature to be easily calibrated away. The correction is valid for stationary conditions and usually near the calibration temperature, which is typically at room temperature. However, we show that if the sensor is embedded into a mobile (hand-held) device which has heat sources, such as power electronics, the normal conditions are no longer valid and the calibration fails. In order to improve infrared temperature sensing for mobile devices, the optics concept was studied and detailed design was performed. In addition, the optics performance was modelled and verified by measurement sensor prototyping. A calibration procedure noticing operational temperature variations was applied. The repeatability of the implemented IR temperature sensor using on a correct transferred calibration curve was better than ±0.5 °C in an operational temperature range from +12.6 to +49.3 °C and target range from +10 to +90 °C.
AB - An infrared (IR) temperature measurement system consists of not only a sensor module and electronics, but also an optomechanical system that guides IR radiation onto the sensor. The geometry and emissivity of the parts affects the reading, if the detector sees not only the target but parts of the measuring system itself. In normal industrial applications, the optics is designed so that the surfaces stabilize to the same temperature as the sensor. This allows the error caused by the device temperature to be easily calibrated away. The correction is valid for stationary conditions and usually near the calibration temperature, which is typically at room temperature. However, we show that if the sensor is embedded into a mobile (hand-held) device which has heat sources, such as power electronics, the normal conditions are no longer valid and the calibration fails. In order to improve infrared temperature sensing for mobile devices, the optics concept was studied and detailed design was performed. In addition, the optics performance was modelled and verified by measurement sensor prototyping. A calibration procedure noticing operational temperature variations was applied. The repeatability of the implemented IR temperature sensor using on a correct transferred calibration curve was better than ±0.5 °C in an operational temperature range from +12.6 to +49.3 °C and target range from +10 to +90 °C.
KW - Temperature
KW - infrared measurement sensor
KW - mobile device
KW - calibration
U2 - 10.1109/ESTC.2008.4684455
DO - 10.1109/ESTC.2008.4684455
M3 - Conference article in proceedings
SN - 978-1-4244-2813-7
SN - 978-1-4244-2814-4
SP - 809
EP - 814
BT - Proceedings
PB - IEEE Institute of Electrical and Electronic Engineers
CY - London
ER -