Reliability and validity of estimated angles information assessed using inertial measurement unit-based motion sensors.

IF 1 4区医学 Q4 ENGINEERING, BIOMEDICAL

Bio-medical materials and engineering Pub Date : 2024-01-01 DOI:10.3233/BME-240031

Taiki Morikawa, Nariyuki Mura, Toshiaki Sato, Hiroshi Katoh

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引用次数: 0

Abstract

Background: Inertial measurement unit (IMU)-based motion sensors are affordable, and their use is appropriate for rehabilitation. However, regarding the accuracy of estimated angle information obtained from this sensor, it is reported that it is likely affected by velocity.

Objective: The present study investigated the reliability and validity of the angle information obtained using IMU-based sensors compared with a three-dimensional (3D) motion analyzer.

Methods: The Euler angle obtained using the 3D motion analyzer and the angle obtained using the IMU-based sensor (IMU angle) were compared. Reliability was assessed by comparing the Bland-Altman analysis, intra-class correlation coefficient (ICC) (1,1), and cross-correlation function. The root mean square (RMS) error, ICC (2,1), and cross-correlation function were used to compare data on the Euler and IMU angles to evaluate the validity.

Results: Regarding reliability, the Bland-Atman analysis indicated no fixed or proportional bias in the angle measurements. The measurement errors ranged from 0.2° to 3.2°. In the validity, the RMS error ranged from 0.3° to 2.2°. The ICCs (2,1) were 0.9. The cross-correlation functions were >0.9, which indicated a high degree of agreement.

Conclusion: The IMU-based sensor had a high reliability and validity. The IMU angle may be used in rehabilitation.

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使用基于惯性测量单元的运动传感器评估估计角度信息的可靠性和有效性。

背景：基于惯性测量单元（IMU）的运动传感器价格低廉，适合用于康复训练。然而，据报道，从这种传感器获得的估计角度信息的准确性很可能受到速度的影响：本研究对使用基于 IMU 的传感器和三维（3D）运动分析仪获得的角度信息的可靠性和有效性进行了比较：方法：比较使用三维运动分析仪获得的欧拉角和使用基于 IMU 的传感器获得的角度（IMU 角度）。通过比较 Bland-Altman 分析、类内相关系数 (ICC) (1,1) 和交叉相关函数来评估可靠性。均方根误差、ICC (2,1) 和交叉相关函数用于比较欧拉角和 IMU 角的数据，以评估有效性：关于可靠性，布兰德-阿特曼分析表明角度测量没有固定或比例偏差。测量误差在 0.2° 至 3.2° 之间。在有效性方面，均方根误差介于 0.3°至 2.2°之间。ICCs (2,1) 为 0.9。交叉相关函数大于 0.9，表明一致性很高：基于 IMU 的传感器具有很高的可靠性和有效性。结论：基于 IMU 的传感器具有较高的可靠性和有效性，IMU 角度可用于康复治疗。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bio-medical materials and engineering 工程技术-材料科学：生物材料

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： The aim of Bio-Medical Materials and Engineering is to promote the welfare of humans and to help them keep healthy. This international journal is an interdisciplinary journal that publishes original research papers, review articles and brief notes on materials and engineering for biological and medical systems. Articles in this peer-reviewed journal cover a wide range of topics, including, but not limited to: Engineering as applied to improving diagnosis, therapy, and prevention of disease and injury, and better substitutes for damaged or disabled human organs; Studies of biomaterial interactions with the human body, bio-compatibility, interfacial and interaction problems; Biomechanical behavior under biological and/or medical conditions; Mechanical and biological properties of membrane biomaterials; Cellular and tissue engineering, physiological, biophysical, biochemical bioengineering aspects; Implant failure fields and degradation of implants. Biomimetics engineering and materials including system analysis as supporter for aged people and as rehabilitation; Bioengineering and materials technology as applied to the decontamination against environmental problems; Biosensors, bioreactors, bioprocess instrumentation and control system; Application to food engineering; Standardization problems on biomaterials and related products; Assessment of reliability and safety of biomedical materials and man-machine systems; and Product liability of biomaterials and related products.