LOCATE-US: Indoor Positioning for Mobile Devices Using Encoded Ultrasonic Signals, Inertial Sensors and Graph- Matching
Authors
Gualda Gómez, David; Pérez Rubio, María Del Carmen; Ureña Ureña, Jesús; Pérez Bachiller, Sergio; Villadangos Carrizo, José Manuel; [et al.]Identifiers
Permanent link (URI): http://hdl.handle.net/10017/57884DOI: 10.3390/s21061950
ISSN: 1424-8220
Publisher
MDPI
Date
2021-03-10Funders
Universidad de Alcalá
Junta de Comunidades de Castilla-La Mancha
Agencia Estatal de Investigación
Bibliographic citation
Gualda, D. [et al.]. 2021, "LOCATE-US: Indoor Positioning for Mobile Devices Using Encoded Ultrasonic Signals, Inertial Sensors and Graph- Matching", Sensors, vol. 21, no. 6, art. no. 1950, pp. 1-25.
Keywords
indoor LPS
Smartphone positioning
Ultrasonic signals
Inertial measurements
Sensor fusion
Android application
Project
info:eu-repo/grantAgreement/UAH//CCG2018%2FEXP-076
info:eu-repo/grantAgreement/JCCM//SBPLY%2F17%2F180501%2F000392
info:eu-repo/grantAgreement/UAH//CM-JIN-2019-043
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-095168-B-C51/ES/SISTEMAS DE POSICIONAMIENTO LOCAL: ENFOQUE HOLISTICO DESDE LAS TECNOLOGIAS BASE HASTA LAS APLICACIONES/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105470RA-C33/ES/MEJORANDO Y FOMENTANDO LA VIDA ACTIVA Y BIENESTAR DE LAS PERSONAS CON DEMENCIA Y DETERIORO COGNITIVO LEVE MEDIANTE EL USO DE TECNICAS DE LOCALIZACION/
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
https://doi.org/10.3390/s21061950Rights
Attribution-NonCommercial-NoDerivatives 4.0 International (CC-BY-NC-ND 4.0)
Access rights
info:eu-repo/semantics/openAccess
Abstract
Indoor positioning remains a challenge and, despite much research and development carried out in the last decade, there is still no standard as with the Global Navigation Satellite Systems (GNSS) outdoors. This paper presents an indoor positioning system called LOCATE-US with adjustable granularity for use with commercial mobile devices, such as smartphones or tablets. LOCATE-US is privacy-oriented and allows every device to compute its own position by fusing ultrasonic, inertial sensor measurements and map information. Ultrasonic Local Positioning Systems (ULPS) based on encoded signals are placed in critical zones that require an accuracy below a few decimeters to correct the accumulated drift errors of the inertial measurements. These systems are well suited to work at room level as walls confine acoustic waves inside. To avoid audible artifacts, the U-LPS emission is set at 41.67 kHz, and an ultrasonic acquisition module with reduced dimensions is attached to the mobile device through the USB port to capture signals. Processing in the mobile device involves an improved Time Differences of Arrival (TDOA) estimation that is fused with the measurements from an external inertial sensor to obtain real-time location and trajectory display at a 10 Hz rate. Graph-matching has also been included, considering available prior knowledge about the navigation scenario. This kind of device is an adequate platform for Location-Based Services (LBS), enabling applications such as augmented reality, guiding applications, or people monitoring and assistance. The system architecture can easily incorporate new sensors in the future, such as UWB, RFiD or others.
Files in this item
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LOCATE_US_Gualda_Sensors_2021.pdf | 1.164Mb |
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LOCATE_US_Gualda_Sensors_2021.pdf | 1.164Mb |
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