Positionsbestimmung kinematischer Ketten mit inertialen Sensorsystemen/ Position measurement of cinematic mechanisms by inertial sensor systems

The kinematics of the human body is very complex. Every movement involves many joints, muscles and a special nervous control. The modern miniaturized inertial sensor systems prove to be valuable tools for rehabilitation medicine. We present the way a system of inertial sensors can be used to compare healthy and affected lower limb movements during gait.

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Foot Position Measurement during Assistive Motion for Sit-to-Stand Using a Single Inertial Sensor and Shoe-Type Force Sensors

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph181910481 ◽

2021 ◽

Vol 18 (19) ◽

pp. 10481

Author(s):

Kodai Kitagawa ◽

Ibai Gorordo Fernandez ◽

Takayuki Nagasaki ◽

Sota Nakano ◽

Mitsumasa Hida ◽

...

Keyword(s):

Motion Capture ◽

Inertial Sensor ◽

Body Height ◽

Force Sensors ◽

Motion Capture System ◽

Position Measurement ◽

Sit To Stand ◽

Optical Motion ◽

Optical Motion Capture ◽

Foot Position

Assistive motion for sit-to-stand causes lower back pain (LBP) among caregivers. Considering previous studies that showed that foot position adjustment could reduce lumbar load during assistive motion for sit-to-stand, quantitative monitoring of and instructions on foot position could contribute toward reducing LBP among caregivers. The present study proposes and evaluates a new method for the quantitative measurement of foot position during assistive motion for sit-to-stand using a few wearable sensors that are not limited to the measurement area. The proposed method measures quantitative foot position (anteroposterior and mediolateral distance between both feet) through a machine learning technique using features obtained from only a single inertial sensor on the trunk and shoe-type force sensors. During the experiment, the accuracy of the proposed method was investigated by comparing the obtained values with those from an optical motion capture system. The results showed that the proposed method produced only minor errors (less than 6.5% of body height) when measuring foot position during assistive motion for sit-to-stand. Furthermore, Bland–Altman plots suggested no fixed errors between the proposed method and the optical motion capture system. These results suggest that the proposed method could be utilized for measuring foot position during assistive motion for sit-to-stand.

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Reliability, Validity and Utility of Inertial Sensor Systems for Postural Control Assessment in Sport Science and Medicine Applications: A Systematic Review

Sports Medicine ◽

10.1007/s40279-019-01095-9 ◽

2019 ◽

Vol 49 (5) ◽

pp. 783-818 ◽

Cited By ~ 13

Author(s):

William Johnston ◽

Martin O’Reilly ◽

Rob Argent ◽

Brian Caulfield

Keyword(s):

Systematic Review ◽

Postural Control ◽

Inertial Sensor ◽

Sensor Systems ◽

Sport Science

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A Wearable Attitude-Measurement System Using a Fiberoptic Gyroscope

Presence Teleoperators & Virtual Environments ◽

10.1162/1054746021470568 ◽

2002 ◽

Vol 11 (2) ◽

pp. 109-118 ◽

Cited By ~ 3

Author(s):

Keiichi Sawada ◽

Masayuki Okihara ◽

Shigeru Nakamura

Keyword(s):

Measurement System ◽

Mixed Reality ◽

Inertial Sensor ◽

Attitude Measurement ◽

Sensor Systems ◽

Wearable Sensor ◽

Measurement Systems

An attitude-measurement system (TISS-5-40) has been developed to achieve a wearable sensor for individuals. This equipment is one of the inertial sensor systems having three fiberoptic gyroscopes and three accelerometers. Heading stability of 1 deg./hr. (1σ) and attitude accuracy of ±0.5 deg. have been demonstrated. At present, some of the attitude-measurement Systems have been applied in the field of mixed-reality technology, and the users confirm and report its effectiveness (Hara, Anabuki, Satoh, Yamamoto, & Tamura, 2000).

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