System for Evaluation and Compensation of Leg Length Discrepancy for Human Body Balancing

Vrhovski, Zoran; Obrovac, Karlo; Nižetić, Josip; Mutka, Alan; Klobučar, Hrvoje; Bogdan, Stjepan

doi:10.3390/app9122504

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…This was accomplished by using developed low-cost portable force plates. The authors in [8] used two force plates to measure the distribution of load on the left and right leg, with the goal of assessing leg length discrepancy. In [9], the authors used the Nintendo Wii Balance Board for the analysis of human walking, which is a low-cost and portable force plate for game control.…”

Section: Introductionmentioning

confidence: 99%

Development and Validation of a System for Game Control Based on a Force Plate

Vrhovski,

Benkek,

Husak

et al. 2023

Applied Sciences

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A force plate is a device that measures the ground reaction force caused by a shift in the human body’s center of mass (CoM). Using a controlled change in the human body’s CoM, the human body’s center of pressure (CoP) is shifted in a 2D plane, along with an acceleration of the CoM along the plane perpendicular to the force plate, which allows for a generation of reference values for game control. In this paper, the development and validation of a system for game control based on a force plate are described. The game control system consists of a force plate, an electronic board used for measuring and PC communication via USB, and a PC application for data acquisition, system calibration, and game control. Based on the measured values of the player’s CoP and the CoM acceleration along a plane perpendicular to the force plate, the game control system simulates pressing the UP, DOWN, RIGHT, LEFT, and SPACE keyboard keys or moving the mouse and clicking the left mouse button, which allows players to control simple games. A mathematical model has been developed for the game control system which includes running system calibration procedures in the system for each individual player. The mechatronic game control system is described in detail, and experiments were run on said system for the purpose of system validation.

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Section: Introductionmentioning

confidence: 99%

Development and Validation of a System for Game Control Based on a Force Plate

Vrhovski,

Benkek,

Husak

et al. 2023

Applied Sciences

Self Cite

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Testing a New Concept of a Self-Adaptive Transtibial Prosthesis

Fodor,

Chitariu,

Seghedin

2023

Bulletin of the Polytechnic Institute of Iași. Machine Constructions Section

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A considerable number of prosthetic medical devices for amputees are known. These devices do not fully replace the biological functions of the lost limb following lower amputations. In the case of pediatric patients, the problem is even more serious, as they are growing, it is necessary to regularly adjust the height of the prosthesis. Otherwise, a discrepancy occurs in the length of the limbs, that changes the center of gravity of the body of the prosthesis wearer, leading to related and sometimes serious pathologies. Currently, there are only classic, passive modules for adjusting the height of the prosthesis, but which are adjusted manually with low precision and extensive work. The present work contains the method of digital control of the prosthesis that can ensure the motorized height adjustment of the patient’s lower limb. The results obtained from the experimental tests are presented, which indicate that this type of concept is feasible from a biomechanical point of view and can be a technical advance in the market of prosthetic medical devices addressed to the pediatric area.

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System for Evaluation and Compensation of Leg Length Discrepancy for Human Body Balancing

Vrhovski¹,

Obrovac²,

Nižetić³

et al. 2019

Applied Sciences

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Leg Length Discrepancy (LLD) causes a shift of the Center of Mass (CoM) of the human body, as well as an asymmetry in load distribution on the lower extremities. Existing LLD evaluation methods do not take into account this shift in the human body’s CoM. In this paper, a methodology and mechatronic system for the Evaluation and Compensation of LLD for Human Body Balancing are described. The human body’s CoM is measured with two force plates located on two parallel manipulators. Since persons with LLD experience a shift in their CoM, by raising the force plate that is under the shorter leg, the human body can be balanced. For this purpose, the Human Body Balancing Algorithm (HBBA) was proposed and developed. By running the HBBA, the height difference between the force plates under the left and right leg can be measured, which then represents the LLD evaluation. Based on this evaluation, it is possible to design and make a shoe insole which compensates the influence of LLD with the goal of equalizing the load on the legs. A virtual mathematical model of the system was created and the simulation results of the HBBA are presented. The mechatronic system, developed and used to conduct experiments and measurements, is described in detail.

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System for Evaluation and Compensation of Leg Length Discrepancy for Human Body Balancing

Cited by 3 publications

References 30 publications

Development and Validation of a System for Game Control Based on a Force Plate

Development and Validation of a System for Game Control Based on a Force Plate

Testing a New Concept of a Self-Adaptive Transtibial Prosthesis

System for Evaluation and Compensation of Leg Length Discrepancy for Human Body Balancing

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