Suitability of smartphone inertial sensors for real-time biofeedback applications

Kos, Anton (avtor), Tomažič, Sašo (avtor), Umek, Anton (avtor)

This article studies the suitability of smartphones with built-in inertial sensors for biofeedback applications. Biofeedback systems use various sensors to measure body functions and parameters. These sensor data are analyzed, and the results are communicated back to the user, who then tries to act on the feedback signals. Smartphone inertial sensors can be used to capture body movements in biomechanical biofeedback systems. These sensors exhibit various inaccuracies that induce significant angular and positional errors. We studied deterministic and random errors of smartphone accelerometers and gyroscopes, primarily focusing on their biases. Based on extensive measurements, we determined accelerometer and gyroscope noise models and bias variation ranges. Then, we compiled a table of predicted positional and angular errors under various biofeedback system operation conditions. We suggest several bias compensation options that are suitable for various examples of use in real-time biofeedback applications. Measurements within the developed experimental biofeedback application show that under certain conditions, even uncompensated sensors can be used for real-time biofeedback. For general use, especially for more demanding biofeedback applications, sensor biases should be compensated. We are convinced that real-time biofeedback systems based on smartphone inertial sensors are applicable to many similar examples in sports, healthcare, and other areas.

• Jezik: Angleški jezik
• Ključne besede: biofeedback system, smartphone sensors, MEMS sensors, sensor noise, Allan variance, bias error, bias compensation, real-time biofeedback application
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2016
• Št. strani: 21 str.
• Številčenje: Vol. 16, iss. 3, art. 301
• PID: 20.500.12556/RUL-130317
• UDK: 621.39
• ISSN pri članku: 1424-8220
• DOI: 10.3390/s16030301
• COBISS.SI-ID: 11297876
• Datum objave v RUL: 13.09.2021

Gradivo je del revije

• Naslov: Sensors
• Skrajšan naslov: Sensors
• Založnik: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 01.03.2016

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: sistem z biološko povratno zanko, senzorji pametnih telefonov, MEMS senzorji, šum senzorjev, Allan varianca, napaka ničelne vrednosti, kompenzacija ničelne vrednosti, aplikacija z biološko povratno vezavo v realnem času

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0246
• Naslov: Algoritmi in optimizacijski postopki v telekomunikacijah

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: L2-5481
• Naslov: Uporaba brezžičnih senzorskih naprav za spremljanje gibanja in biološko povratno vezavo