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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：Professor, Head of Lab of Intelligent System
其他任职：大连市工业无线传感器网络工程实验室主任
性别：男
毕业院校：英国杜伦大学
学位：博士
所在单位：控制科学与工程学院
学科：控制理论与控制工程. 模式识别与智能系统. 检测技术与自动化装置
办公地点：海山楼A0624
课题组网址http://lis.dlut.edu.cn/
联系方式：0411-84709010 wangzl@dlut.edu.cn
电子邮箱：wangzl@dlut.edu.cn
A method to deal with installation errors of wearable accelerometers for human activity recognition
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论文类型：期刊论文
发表时间：2011-03-01
发表刊物：PHYSIOLOGICAL MEASUREMENT
收录刊物：Scopus、SCIE、PubMed
卷号：32
期号：3
页面范围：347-358
ISSN号：0967-3334
关键字：human activity recognition; accelerometer; installation error; calibration; Gram-Schmidt orthonormalization
摘要：Human activity recognition (HAR) by using wearable accelerometers has gained significant interest in recent years in a range of healthcare areas, including inferring metabolic energy expenditure, predicting falls, measuring gait parameters and monitoring daily activities. The implementation of HAR relies heavily on the correctness of sensor fixation. The installation errors of wearable accelerometers may dramatically decrease the accuracy of HAR. In this paper, a method is proposed to improve the robustness of HAR to the installation errors of accelerometers. The method first calculates a transformation matrix by using Gram-Schmidt orthonormalization in order to eliminate the sensor's orientation error and then employs a low-pass filter with a cut-off frequency of 10 Hz to eliminate the main effect of the sensor's misplacement. The experimental results showed that the proposed method obtained a satisfactory performance for HAR. The average accuracy rate from ten subjects was 95.1% when there were no installation errors, and was 91.9% when installation errors were involved in wearable accelerometers.