Body position can be monitored in 3D using miniature accelerometers and earth-magnetic field sensors

Electroencephalography and Clinical Neurophysiology/Electromyography and Motor Control Pub Date : 1998-12-01 DOI:10.1016/S0924-980X(98)00053-8

Bob Kemp, Ad J.M.W. Janssen, Bob van der Kamp

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引用次数: 134

Abstract

Objectives: The study and diagnosis of movement disorders can be improved by monitoring body position simultaneously with the EMG.Methods: We developed a monitor of the 3-dimensional (3D) orientation of body parts that can be applied in long-term ambulatory recordings in the daily life of a patient. The 3D sensor combines miniature sensors for earth's gravity and magnetism. It measures 60×50×10 mm and draws less than 1 mA of current from ±5 V battery power. The non-horizontal direction of earth magnetism, as well as torque (pronation) of the body part, is corrected mathematically.Results: This results in a measurement of the 3D orientation of a body part in terms of vertical inclination and horizontal azimuth.Conclusions: Calibration measurements indicate that this method is fairly accurate and practically applicable.

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使用微型加速度计和地磁场传感器可以在3D中监测身体位置

目的:体位与肌电图同时监测有助于运动障碍的研究和诊断。方法:我们开发了一种身体部位的三维(3D)方向监视器，可用于患者日常生活中的长期动态记录。3D传感器结合了地球重力和磁力的微型传感器。它的尺寸为60×50×10 mm，从±5v电池电源中吸取小于1ma的电流。地磁的非水平方向，以及身体部位的转矩(旋前)，都进行了数学校正。结果:这导致在垂直倾斜和水平方位角方面的身体部分的三维方向的测量。结论:该方法具有较高的准确度和实用性。

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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Electroencephalography and Clinical Neurophysiology/Electromyography and Motor Control

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