Improving goniometer accuracy by compensating for individual transducer characteristics
(2009) In Journal of Electromyography & Kinesiology 19(4). p.704-709- Abstract
- Flexible goniometers are useful for direct movement measurements. Crosstalk due to rotation between the endblocks is well known. However, even without any rotation, some crosstalk can occur. The objective of this study was to elucidate the effect of, and compensate for, the inherent crosstalk in biaxial goniometers, with specific relevance for applications with one dominating movement direction. Six biaxial goniometers (M110, Biometrics Ltd., Gwent, UK) were evaluated. A precision jig, for simulating pure flexion/extension angles, was constructed. Each sensor produced a consistent and specific crosstalk pattern, when tested over a +/-100 degrees range of motion. A procedure for correction for the inherent crosstalk of individual... (More)
- Flexible goniometers are useful for direct movement measurements. Crosstalk due to rotation between the endblocks is well known. However, even without any rotation, some crosstalk can occur. The objective of this study was to elucidate the effect of, and compensate for, the inherent crosstalk in biaxial goniometers, with specific relevance for applications with one dominating movement direction. Six biaxial goniometers (M110, Biometrics Ltd., Gwent, UK) were evaluated. A precision jig, for simulating pure flexion/extension angles, was constructed. Each sensor produced a consistent and specific crosstalk pattern, when tested over a +/-100 degrees range of motion. A procedure for correction for the inherent crosstalk of individual goniometer, based on polynomial adjust, is presented. The method for compensation, which reduced the root mean square error from, on average for the six goniometers, 3.7 degrees (range 1.8-10.1 degrees) to 0.35 degrees (0.12-0.55 degrees), might be required for obtaining valid goniometer measurements, e.g. of valgus/varus of the knee during gait flexion/extension movements. (C) 2008 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1462473
- author
- Sato, Tatiana de Oliveira ; Cote Gil Coury, Helenice Jane and Hansson, Gert-Åke LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Crosstalk, Goniometer, Knee, Gait
- in
- Journal of Electromyography & Kinesiology
- volume
- 19
- issue
- 4
- pages
- 704 - 709
- publisher
- Elsevier
- external identifiers
-
- wos:000267836000019
- scopus:67349285694
- ISSN
- 1873-5711
- DOI
- 10.1016/j.jelekin.2008.01.006
- language
- English
- LU publication?
- yes
- id
- f99336cc-b213-4772-b04a-baed45818105 (old id 1462473)
- date added to LUP
- 2016-04-01 12:08:44
- date last changed
- 2025-04-04 13:59:42
@article{f99336cc-b213-4772-b04a-baed45818105,
abstract = {{Flexible goniometers are useful for direct movement measurements. Crosstalk due to rotation between the endblocks is well known. However, even without any rotation, some crosstalk can occur. The objective of this study was to elucidate the effect of, and compensate for, the inherent crosstalk in biaxial goniometers, with specific relevance for applications with one dominating movement direction. Six biaxial goniometers (M110, Biometrics Ltd., Gwent, UK) were evaluated. A precision jig, for simulating pure flexion/extension angles, was constructed. Each sensor produced a consistent and specific crosstalk pattern, when tested over a +/-100 degrees range of motion. A procedure for correction for the inherent crosstalk of individual goniometer, based on polynomial adjust, is presented. The method for compensation, which reduced the root mean square error from, on average for the six goniometers, 3.7 degrees (range 1.8-10.1 degrees) to 0.35 degrees (0.12-0.55 degrees), might be required for obtaining valid goniometer measurements, e.g. of valgus/varus of the knee during gait flexion/extension movements. (C) 2008 Elsevier Ltd. All rights reserved.}},
author = {{Sato, Tatiana de Oliveira and Cote Gil Coury, Helenice Jane and Hansson, Gert-Åke}},
issn = {{1873-5711}},
keywords = {{Crosstalk; Goniometer; Knee; Gait}},
language = {{eng}},
number = {{4}},
pages = {{704--709}},
publisher = {{Elsevier}},
series = {{Journal of Electromyography & Kinesiology}},
title = {{Improving goniometer accuracy by compensating for individual transducer characteristics}},
url = {{http://dx.doi.org/10.1016/j.jelekin.2008.01.006}},
doi = {{10.1016/j.jelekin.2008.01.006}},
volume = {{19}},
year = {{2009}},
}