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1. CA2303882 - MEASURING FOOT CONTACT TIME AND FOOT LOFT TIME OF A PERSON IN LOCOMOTION

专利局 加拿大
申请号 2303882
申请日 15.07.1998
公布号 2303882
公布日 15.04.1999
公布类型 A1
国际专利分类
G PHYSICS
04
测时学
F
时间间隔的测量
10
用电装置测量未知的时间间隔的仪表
G PHYSICS
04
测时学
G
电子计时器
21
集成在计时器中的输入或输出装置
02
外部物理量的探测器,例如温度
A 人类生活必需
61
医学或兽医学;卫生学
B
诊断;外科;鉴定
5
用于诊断目的的测量;人的辨识
103
用于诊断目的的测量人体或人体部分的形状、模式、尺寸或运动的测量装置
G PHYSICS
01
用于测量的传感器,如敏感元件
C
测量距离、水准或者方位;勘测;导航;陀螺仪;摄影测量学或视频测量学
22
测量车辆、人员、动物或其他运动的固态物体在地面行驶的距离,例如,应用里程计或应用计步器
G04F 10/00
G04G 21/02
A61B 5/103
G01C 22/00
CPC
G04G 21/02
A61B 5/1121
A61B 5/1123
A61B 5/681
A61B 5/6831
G01C 22/006
申请人 PERSONAL ELECTRONIC DEVICES, INC.
发明人 GAUDET, PAUL J.
BLACKADAR, THOMAS P.
OLIVER, STEVEN R.
优先权数据 08942802 02.10.1997 US
标题
(EN) MEASURING FOOT CONTACT TIME AND FOOT LOFT TIME OF A PERSON IN LOCOMOTION
(FR) MESURE DE TEMPS DE CONTACT DE PIED ET DE TEMPS DE LEVEE DE PIED D'UNE PERSONNE EN DEPLACEMENT
摘要
(EN)
The time period that a foot is in contact with the ground during a stride taken by a user, and the period that the foot is not in contact with the ground between strides taken by the user are determined by processing and analyzing the output signal of an accelerometer (34). The accelerometer (34) is mounted on the user such that its acceleration sensing axis senses acceleration in a direction substantially parallel to the bottom of the user's foot. The output of the accelerometer (34) is high-pass filtered (36), amplified (38), and fed to the input of a micro-controller (40), which monitors the signal for positive and negative signal spikes that are indicative, respectively, of the moment that the foot of the user leaves the ground and the moment that the foot impacts with the ground. By measuring time intervals between these positive and negative spikes, average "foot contact times" and "foot loft times" of the user may be calculated. To derive the pace of the user, the average foot contact time is multiplied by the first constant if it is less than 400 mili-seconds (ms) and is multiplied by a second constant if it is greater than 400 ms. This pace value may, in turn, be used to calculate the distance traveled by the user.

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