T. Leikanger, C. Schuss and J. Häkkinen, "Calibration of smartphone light sensors with a near field communication enabled reference," 2016 IEEE SENSORS, Orlando, FL, USA, 2016, pp. 1-3. doi: 10.1109/ICSENS.2016.7808930
Calibration of smartphone light sensors with a near field communication enabled reference
|Author:||Leikanger, Tore1; Schuss, Christian1; Häkkinen, Juha1|
1Circuits and Systems (CAS), University of Oulu, Oulu, Finland
|Online Access:||PDF Full Text (PDF, 1.2 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe201701131144
|Publish Date:|| 2017-01-15
AbstractThis paper describes a technique for calibrating the internal ambient light sensor (ALS) in smart phones. The calibration process depends on Near-Field Communication (NFC). The system consists of an NFC core implemented in an Field-Programmable Gate-Array (FPGA) development platform featuring the NFC analog front end circuit. In the proposed system, the smart phone interacts directly with a reference ALS through the NFC device The direct communication is possible with the help of a custom NFC command that controls an Inter-Integrated Circuit (I2C) master core in the FPGA. After the calibration process of the ALS in a smart phone is completed, the accuracy of the measurement is greatly improved. This is helpful to obtain precise information on the light intensity in indoor surroundings.
Proceedings of IEEE Sensors
|Pages:||1571 - 1573|
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