scholarly journals Reliability of the step phase detection using inertial measurement units: pilot study

2015 ◽  
Vol 2 (2) ◽  
pp. 58-63 ◽  
Author(s):  
Salvatore Sessa ◽  
Massimiliano Zecca ◽  
Luca Bartolomeo ◽  
Takamichi Takashima ◽  
Hiroshi Fujimoto ◽  
...  
Keyword(s):  
Pilot Study ◽  
Phase Detection ◽  
Inertial Measurement Units ◽  
Inertial Measurement ◽  
Measurement Units

scholarly journals Quantifying Pathological Synergies in the Upper Extremity of Stroke Subjects With the Use of Inertial Measurement Units: A Pilot Study

2021 ◽  
Vol 9 ◽  
pp. 1-11
Author(s):  
Miguel M. C. Bhagubai ◽  
Gerjan Wolterink ◽  
Anne Schwarz ◽  
Jeremia P. O. Held ◽  
Bert-Jan F. Van Beijnum ◽  
...  
Keyword(s):  
Pilot Study ◽  
Upper Extremity ◽  
Inertial Measurement Units ◽  
Inertial Measurement ◽  
Measurement Units

scholarly journals Pilot-study of ridden walk on the circle – effects of progressive collection and lateral exercises

2021 ◽  
pp. 1-16
Author(s):  
A. Egenvall ◽  
H. Engström ◽  
A. Byström
Keyword(s):  
Pilot Study ◽  
Mixed Models ◽  
Hind Limb ◽  
Stride Length ◽  
Sacral Vertebra ◽  
Inertial Measurement Units ◽  
Inertial Measurement ◽  
Measurement Units ◽  
Stride Duration ◽  
Head Neck

When collecting the horse, the rider influences stride length, forehand/hindquarters balance, and head-neck position. The study aim was to describe the vertical excursion of the withers and croup, and the sagittal cannon angles during collection and lateral exercises. Ten horses were ridden by five riders during 14 trials (1-5 per rider) on 10 m circles. Each trial included free walk, four degrees of increasing collection, and haunches-in and shoulderin. Inertial measurement units (100 Hz) were positioned on the withers, the first sacral vertebra (S1) and laterally on the cannons. Data for each exercise were stride-split. Range of motion (ROM), minima and maxima were studied in mixed models, controlling for stride duration. S1 vertical ROM ranged between 30-32 mm (highest degree of collection) and 51 mm (free walk), significantly smaller with increasing collection. S1 ROM during the inside hind limb step was smaller in haunches-in and shoulder-in compared to at the lowest degree of collection. Withers ROM ranged between 12 mm (lowest degree of collection) and 16-18 mm (highest degree of collection). Fore cannon protraction-retraction ROM ranged between 57° (highest degree of collection) and 63° (free walk). Hind cannon protraction-retraction ROM ranged between 47-50° (highest degree of collection) and 51-56° (free walk). All limbs had significantly smaller ROM at the highest degree of collection. Cannon ROMs were smaller for the outer limbs in haunches-in, and all limbs but the outer fore in shoulder-in, compared to the lowest degree of collection. Progressively decreasing ROM for fore- and hind limb cannons and S1 suggest that the riders achieved a shortening of the gait at higher degrees of collection. In shoulder-in and haunches-in, the diagonal oriented in the direction of motion showed decreased hind limb cannon ROM while forelimb cannon ROM was maintained, which could suggest increased shoulder freedom and collection of the targeted diagonal.

scholarly journals Analysis of ergonomic and unergonomic human lifting behaviors by using Inertial Measurement Units

2017 ◽  
Vol 3 (1) ◽  
pp. 7-10 ◽  
Author(s):  
Jan Kuschan ◽  
Henning Schmidt ◽  
Jörg Krüger
Keyword(s):  
Quality Of Life ◽  
Machine Learning ◽  
Angular Velocity ◽  
Musculoskeletal System ◽  
Occupational Diseases ◽  
Inertial Measurement Units ◽  
Inertial Measurement ◽  
Measurement Units ◽  
Main Components

Abstract:This paper presents an analysis of two distinct human lifting movements regarding acceleration and angular velocity. For the first movement, the ergonomic one, the test persons produced the lifting power by squatting down, bending at the hips and knees only. Whereas performing the unergonomic one they bent forward lifting the box mainly with their backs. The measurements were taken by using a vest equipped with five Inertial Measurement Units (IMU) with 9 Dimensions of Freedom (DOF) each. In the following the IMU data captured for these two movements will be evaluated using statistics and visualized. It will also be discussed with respect to their suitability as features for further machine learning classifications. The reason for observing these movements is that occupational diseases of the musculoskeletal system lead to a reduction of the workers’ quality of life and extra costs for companies. Therefore, a vest, called CareJack, was designed to give the worker a real-time feedback about his ergonomic state while working. The CareJack is an approach to reduce the risk of spinal and back diseases. This paper will also present the idea behind it as well as its main components.

scholarly journals Inertial measurement units to estimate drag forces and power output during standardised wheelchair tennis coast-down and sprint tests

2021 ◽  
pp. 1-19
Author(s):  
Thomas Rietveld ◽  
Barry S. Mason ◽  
Victoria L. Goosey-Tolfrey ◽  
Lucas H. V. van der Woude ◽  
Sonja de Groot ◽  
...  
Keyword(s):  
Power Output ◽  
Inertial Measurement Units ◽  
Inertial Measurement ◽  
Drag Forces ◽  
Measurement Units

scholarly journals Measurement of respiratory rate with inertial measurement units

2020 ◽  
Vol 6 (3) ◽  
pp. 237-240
Author(s):  
Simon Beck ◽  
Bernhard Laufer ◽  
Sabine Krueger-Ziolek ◽  
Knut Moeller
Keyword(s):  
Air Pollution ◽  
Respiratory Rate ◽  
Frequency Analysis ◽  
Clinical Settings ◽  
Breathing Rate ◽  
Demographic Changes ◽  
Inertial Measurement Units ◽  
Inertial Measurement ◽  
Respiratory Parameters ◽  
Measurement Units

AbstractDemographic changes and increasing air pollution entail that monitoring of respiratory parameters is in the focus of research. In this study, two customary inertial measurement units (IMUs) are used to measure the breathing rate by using quaternions. One IMU was located ventral, and one was located dorsal on the thorax with a belt. The relative angle between the quaternion of each IMU was calculated and compared to the respiratory frequency obtained by a spirometer, which was used as a reference. A frequency analysis of both signals showed that the obtained respiratory rates vary slightly (less than 0.2/min) between the two systems. The introduced belt can analyse the respiratory rate and can be used for surveillance tasks in clinical settings.

scholarly journals Camera and inertial sensor fusion for the PnP problem: algorithms and experimental results

2021 ◽  
Vol 32 (4) ◽  
Author(s):  
Luigi D’Alfonso ◽  
Emanuele Garone ◽  
Pietro Muraca ◽  
Paolo Pugliese
Keyword(s):  
Pose Estimation ◽  
Good Accuracy ◽  
Inertial Sensor ◽  
Experimental Tests ◽  
Inertial Measurement Units ◽  
Magnetic Vector ◽  
Inertial Measurement ◽  
The Earth ◽  
Measurement Units ◽  
Position And Orientation

AbstractIn this work, we face the problem of estimating the relative position and orientation of a camera and an object, when they are both equipped with inertial measurement units (IMUs), and the object exhibits a set of n landmark points with known coordinates (the so-called Pose estimation or PnP Problem). We present two algorithms that, fusing the information provided by the camera and the IMUs, solve the PnP problem with good accuracy. These algorithms only use the measurements given by IMUs’ inclinometers, as the magnetometers usually give inaccurate estimates of the Earth magnetic vector. The effectiveness of the proposed methods is assessed by numerical simulations and experimental tests. The results of the tests are compared with the most recent methods proposed in the literature.

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