پژوهش در طب ورزشی و فناوری

طراحی و نمونه‌سازی دستگاه ارزیابی کلاه در ورزش‌‌های رزمی بر اساس معیارهای دینامیکی

نویسندگان

ندا بروشک
حسن خوشنودی
حسن دانشمندی
منصور اسلامی
https://doi.org/10.29252/jsmt.17.17.37
چکیده
تاکنون استاندارد مشخص و مؤثری برای بررسی کلاه‌ها در ورزش‌های رزمی تعیین نشده است و این موجب بروز آسیب‌های مغزی بسیاری گردیده است. هدف این مطالعه، طراحی و نمونه‌سازی دستگاه ارزیابی کلاه در ورزش‌های رزمی بر اساس پارامترها و معیارهای دینامیکی بود. جهت طراحی این دستگاه از نرم‌افزارهای SolidWorks، Adams و Catia استفاده شد؛ همچنین، به منظور ساخت این دستگاه از یک سر مصنوعی مجهز به حسگرهای نیرو و شتاب و یک بازوی مکانیکی جهت اعمال ضربه به سر بهره گرفته شد. روایی دستگاه با مقایسه نتایج حاصل از آن (نیروی ضربه، شتاب خطی و شتاب چرخشی) با نتایج حاصل از مدل شبیه‌سازی شده در کامپیوتر انجام گردید. ضریب همبستگی پیرسون 0/9 بدست‌آمده از این مقایسه، حاکی از درستی نتایج دستگاه می‌باشد. جهت پایایی نتایج دستگاه نیز، از ضریب درون همبستگی استفاده شد که نتایج، مقادیر 0/7 و بزرگ‌تر از آن را نشان داده و تکرارپذیری مناسب دستگاه را تأیید نمود. با توجه به نتایج تحقیق، دستگاه حاضر با در نظر گرفتن پارامترهای مهم شتاب‌های چرخشی و خطی و نیروی ضربه در ارزیابی کلاه‌ها و بررسی مکانیسم آسیب سر در شرایط نزدیک به مسابقه، می‌تواند ابزار مناسبی جهت سنجش دقیق‌تر کلاه‌ها در ورزش‌های رزمی باشد.

کلیدواژه‌ها

شتاب چرخشی
پارامترهای دینامیکی
آسیب سر

عنوان مقاله English

Designing and simulating of helmet evaluation machine in martial arts based on dynamic’s criterias

نویسندگان English

N Boroushak
H Khoshnoodi
H Daneshmandy
M Eslami
چکیده English

Nowadays there is no specific and effective standard for evaluating the helmets in martial arts which it has caused a lot of brain damages. The purpose of this study was designing and modeling a helmet assessment machine in martial arts, based on dynamic’s parameters and criteria. SolidWorks, Adams and Catia softwares were used for designing this machine. Also, In order to build this machine, an artificial head that equipped with force and acceleration sensors and a mechanical arm for applying impact to the head were used. The validation of the machine was done by comparing its results (impact force, linear acceleration and rotational acceleration) with the results obtained from the simulated model in the computer. The Pearson correlation coefficient of 0.9 that obtained from this comparison indicates that the results of this machine are correct. To confirm the reliability of the machine, an Intraclass Correlations was used, the results showed values of 0.7 and greater than that and it also confirmed the appropriate repeatability of the machine. According to the results of this study, due to the considering the important parameters of linear and rotational acceleration and the impact force in evaluating helmets and investigating the mechanism of head injury in the conditions close to competition ones, the device can be an appropriate equipment for more accurate measurement of helmets in martial arts.

کلیدواژه‌ها English

Rotational Acceleration
Dynamic’s Parameters
Head Injury
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