A simple and inexpensive test-rig for evaluating the performance of motion sensors used in movement disorders research
| dc.contributor.author | Perera, Thushara | |
| dc.contributor.author | Yohanandan, Shivanthan | |
| dc.contributor.author | McDermott, Hugh | |
| dc.date.accessioned | 2015-12-23T22:47:50Z | |
| dc.date.available | 2015-12-23T22:47:50Z | |
| dc.date.issued | 2015-05-29 | |
| dc.description.abstract | Since the advent of electromyogram recording, precise measures of tremor and gait have been used to study movement disorders such as Parkinson’s disease. Now, a wide range of accelerometers and other motion-tracking technologies exist to better inform researchers and clinicians, yet such systems are rarely tested for accuracy or suitability before use. Our inexpensive test-rig can produce sinusoidal displacements using a simple cantilever system driven by a subwoofer. Controlled sinusoids were generated using computer software, and the displacement amplitudes of the test-rig were verified with fiducial marker tracking. To illustrate the use of the test-rig, we evaluated an accelerometer and an electromagnetic motion tracker. Accelerometry recordings were accurate to within ±0.09 g of actual peak-to-peak amplitude with a frequency response close to unity gain between 1 and 20 Hz. The electromagnetic sensor underestimated peak displacement by 2.68 mm, which was largely due to a diminishing gain with increasing frequency. Both sensors had low distortion. Overall sensitivity was limited by noise for the accelerometer and quantisation resolution for the electromagnetic sensor. Our simple and low-cost test-rig can be used to bench-test sensors used in movement disorders research. It was able to produce reliable sinusoidal displacements and worked across the 1- to 20-Hz frequency range. | en_US |
| dc.identifier.citation | Perera, T., S. A. Yohanandan & H. J. McDermott (2015). A simple and inexpensive test-rig for evaluating the performance of motion sensors used in movement disorders research. Medical & biological engineering & computing: [epub ahead of print]. | en_US |
| dc.identifier.issn | 1741-0444 | |
| dc.identifier.uri | http://repository.bionicsinstitute.org:8080/handle/123456789/160 | |
| dc.language.iso | en | en_US |
| dc.publisher | Springer Berlin Heidelberg | en_US |
| dc.subject | Accelerometer | en_US |
| dc.subject | Electromagnetic | en_US |
| dc.subject | Movement disorders | en_US |
| dc.subject | Motion tracking | en_US |
| dc.subject | v | en_US |
| dc.title | A simple and inexpensive test-rig for evaluating the performance of motion sensors used in movement disorders research | en_US |
| dc.type | Article | en_US |