A.Yu. Kurochkin1

1 Saint Petersburg Electrotechnical University "LETI" (Saint-Petersburg, Russia)
1 k.a.u.6587@gmail.com

Problem Statement. In this study, the main problem is to determine the optimal location and number of strain gauges on insoles to accurately measure the patient's center of gravity. Given the variety of possible strain gauge parameters, transducer shapes, and range of measured values, it is necessary to find the best configuration that will provide the required measurement accuracy while maintaining the cost-effectiveness and ease of use of the measurement insoles.

The aim of the work is to develop criteria for the normality of assessing the patient’s center of gravity (CG) and an algorithm that allows determining the optimal position of the sensors under the foot.

Results. As part of the study, an algorithm was developed to optimize the location of strain gauge sensors on film insoles to measure the patient’s center of gravity. The algorithm takes into account various parameters, including the shape and size of the sensors, pressure measurement range, number of sensors, and evaluation accuracy criteria. Using reference pressure data obtained using the DiaSled-Scan complex, the algorithm optimizes the location of the sensors taking into account changes in the points of contact of the foot with the support when walking, which increases the realism of estimating the center of gravity. The supported sensor characteristics and specified evaluation criteria allow the algorithm to determine the optimal location of the sensors, providing high accuracy in estimating the center of gravity. These results will improve the accuracy of measurements of the center of gravity of patients with gait disorders and contribute to the development of more effective methods for the diagnosis and rehabilitation of such patients.

The practical value of the research. The results of this study have high practical value in the context of the development and improvement of podoplantographic systems. The optimal placement and number of strain sensors on insoles can be used in medical diagnosis and rehabilitation of patients with gait disorders such as Parkinson's disease and multiple sclerosis. This will improve the accuracy and reliability of center of gravity measurements, which in turn will lead to more effective methods for diagnosing and rehabilitating patients. Thus, the results of the study contribute to improving the quality of medical care for patients with balance and gait disorders.

Kurochkin A.Yu. Study of the influence of the location of strain gauge sensors on insoles on the accuracy of determining the patient’s center of gravity. Biomedical radioelectronics. 2024. T. 27. № 2. P. 96–102. DOI: https://doi.org/10.18127/j15604136-202402-13 (in Russian)

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