A Doppler-Tolerant Ultrasonic Multiple Access Localization System for Human Gait Analysis

dc.contributor.authorAshhar, Karalikkadanen
dc.contributor.authorKhyam, Mohammad Omaren
dc.contributor.authorSoh, Cheong Boonen
dc.contributor.authorKong, Keng Heen
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2018-08-22T14:51:15Zen
dc.date.available2018-08-22T14:51:15Zen
dc.date.issued2018-07-27en
dc.date.updated2018-08-22T08:32:16Zen
dc.description.abstractRanging based on ultrasonic sensors can be used for tracking wearable mobile nodes accurately for a long duration and can be a cost-effective method for human movement analysis in rehabilitation clinics. In this paper, we present a Doppler-tolerant ultrasonic multiple access localization system to analyze gait parameters in human subjects. We employ multiple access methods using linear chirp wave-forms and narrow-band piezoelectric transducers. A Doppler shift compensation Technique is also incorporated without compromising on the tracking accuracy. The system developed was used for tracking the trajectory of both lower limbs of five healthy adults during a treadmill walk. An optical motion capture system was used as the reference to compare the performance. The average Root Mean Square Error values between the 3D coordinates estimated from the proposed system and the reference system while tracking both lower limbs during treadmill walk experiment by 5 subjects were found to be 16.75, 14.68 and 20.20 mm respectively along X, Y and Z-directions. Errors in the estimation of spatial and temporal parameters from the proposed system were also quantified. These promising results show that narrowband ultrasonic sensors can be utilized to accurately track more than one mobile node for human gait analysis.en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationAshhar, K.; Khyam, M.O.; Soh, C.B.; Kong, K.H. A Doppler-Tolerant Ultrasonic Multiple Access Localization System for Human Gait Analysis. Sensors 2018, 18, 2447.en
dc.identifier.doihttps://doi.org/10.3390/s18082447en
dc.identifier.urihttp://hdl.handle.net/10919/84891en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectmotion trackingen
dc.subjectchannel multiple accessen
dc.subjectultrasonic localizationen
dc.subjectgait analysisen
dc.subjectdoppler shift compensationen
dc.titleA Doppler-Tolerant Ultrasonic Multiple Access Localization System for Human Gait Analysisen
dc.title.serialSensorsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
sensors-18-02447.pdf
Size:
4.82 MB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
Name:
license.txt
Size:
1.5 KB
Format:
Item-specific license agreed upon to submission
Description: