| Title |
Detecting absolute human knee angle and angular velocity using accelerometers and rate gyroscopes
|
|---|---|
| Published in |
Medical & Biological Engineering & Computing, May 2001
|
| DOI | 10.1007/bf02345283 |
| Pubmed ID | |
| Authors |
R. Williamson, B. J. Andrews |
| Abstract |
Knee joint angle and angular velocity were calculated in real time during standing up and sitting down. Two small modules comprising rate gyroscopes and accelerometers were attached to the thigh and shank of two able-bodied volunteers and one T5 ASIA(A) paraplegic assisted by functional electrical stimulation (FES). The offset and drift of the rate gyroscopes was compensated for by auto-resetting and auto-nulling algorithms. The tilt of the limb segments was calculated by combining the signals of the accelerometer and the rate gyroscope. The joint angle was calculated as the difference in tilt of the segments. The modules were also tested on a two-dimensional model. The mean differences between the rate gyroscope-accelerometer system and the reference goniometer for the model, able-bodied and paraplegic standing trials were 2.1 degrees, 2.4 degrees and 2.3 degrees respectively for knee angle and 2.3 degrees s(-1), 5.0 degrees s(-1) and 11.8 degrees s(-1) respectively for knee velocity. The rate gyroscope-accelerometer system was more accurate than using the accelerometer as a tilt meter, possibly due to the greater bandwidth of the rate gyroscope-accelerometer system. |
Mendeley readers
The data shown below were compiled from readership statistics for 189 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 4 | 2% |
| United Kingdom | 3 | 2% |
| Canada | 2 | 1% |
| Spain | 2 | 1% |
| Brazil | 1 | <1% |
| India | 1 | <1% |
| France | 1 | <1% |
| Ukraine | 1 | <1% |
| Germany | 1 | <1% |
| Other | 2 | 1% |
| Unknown | 171 | 90% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 43 | 23% |
| Student > Master | 35 | 19% |
| Researcher | 34 | 18% |
| Student > Bachelor | 13 | 7% |
| Student > Postgraduate | 12 | 6% |
| Other | 29 | 15% |
| Unknown | 23 | 12% |
| Readers by discipline | Count | As % |
|---|---|---|
| Engineering | 94 | 50% |
| Medicine and Dentistry | 15 | 8% |
| Computer Science | 15 | 8% |
| Sports and Recreations | 7 | 4% |
| Agricultural and Biological Sciences | 5 | 3% |
| Other | 23 | 12% |
| Unknown | 30 | 16% |
Attention Score in Context
This research output has an Altmetric Attention Score of 9. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 15 August 2023.
All research outputs
#3,798,611
of 25,374,647 outputs
Outputs from Medical & Biological Engineering & Computing
#57
of 2,053 outputs
Outputs of similar age
#4,006
of 42,351 outputs
Outputs of similar age from Medical & Biological Engineering & Computing
#1
of 4 outputs
Altmetric has tracked 25,374,647 research outputs across all sources so far. Compared to these this one has done well and is in the 83rd percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 2,053 research outputs from this source. They receive a mean Attention Score of 3.8. This one has done particularly well, scoring higher than 93% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 42,351 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 86% of its contemporaries.
We're also able to compare this research output to 4 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them