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Development of an intelligent calorie counter with classification of behavior and estimation of walking velocity

开发具有行为分类和步行速度估计功能的智能卡路里计数器

基本信息

批准号：
11555064
负责人：
ISHIHARA Tadashi
金额：
$ 4.48万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

Energy expenditure in daily life provides important information for physicians who diagnose patients with cardiac disease, for example. This study proposes a concept of measurement system of qualitative energy expenditure so called Intelligent Calorie Counter(ICC). The ICC distinguishes the walking behavior into level walk, ascending, and descending, derives the horizontal and vertical velocity, and estimates the energy expenditure utilizing RMR (Relative Metabolic 'Rate) of each behavior. The main results of this research are summarized as follows:1. Horizontal velocity is non-restrictedly estimated by a sensor system attached on the foot. The acceleration of foot is converted to the horizontal acceleration and is integrated to derive the horizontal velocity. Integral error is eliminated so that the horizontal velocity at the end of the swing phase reaches zero. The experimental results of level walk show that the estimation error of the distance is 2.0 [%] on average.2. Vertical velo … More city is measured by the differentiation of the output of the atmospheric pressure sensor A Kalman filter is applied to the output to reduce the sensor noise and the change of the pressure due to the weather. The experimental results of ascending and descending suggest that the application of the atmospheric pressure sensor provides general purpose measurement system of the vertical displacement and velocity.3. Estimation of energy expenditure during walk is performed by using the ICC which has one dimensional accelerometer and one the atmospheric pressure sensor. Walking behavior classified by the ICC is used to determine the RMR and the energy expenditure. Heart rate, which corresponds to the energy expenditure, is also measured during walk. Experimental results of level walk, ascending, and descending show that the correlation coefficient between the heart rate and the energy expenditure estimated by the ICC is significantly larger than that estimated by the pedometer and/or calorie counter. Less

例如，日常生活中的能量消耗为诊断心脏病患者的医生提供了重要信息。本研究提出了一种质量能量消耗测量系统的概念，称为智能热量计数器(ICC)。ICC将步行行为分为水平行走、上升行走和下降行走，求出水平速度和垂直速度，并利用RMR(相对代谢率)估计每种行为的能量消耗。本文的主要研究成果如下：1.通过安装在脚上的传感器系统无限制地估计水平速度。将足部的加速度转换为水平加速度，并对其进行积分得到水平速度。消除了积分误差，使摆动阶段结束时的水平速度为零。水平行走实验结果表明，距离的估计误差平均为2.0[%]。垂直速度…通过对大气压力传感器输出的差值来测量更多的城市，对输出进行卡尔曼滤波，以降低传感器的噪声和由于天气原因引起的压力变化。上升和下降的实验结果表明，大气压力传感器的应用为垂直位移和速度的测量提供了通用的测量系统。使用一维加速度计和一个大气压力传感器的ICC来估算步行过程中的能量消耗。根据ICC对步行行为的分类来确定RMR和能量消耗。与能量消耗相对应的心率也是在走路时测量的。水平行走、上升和下降的实验结果表明，ICC估计的心率与能量消耗之间的相关系数显著大于计步器和/或卡路里计数器估计的相关系数。较少