Subramaniam Venkatraman,Heiko Gernot Albert Panther,Shelten Gee Jao Yuen
申请号：
US16264488
公开号：
US20190269353A1
申请日:
2019.01.31
申请国别(地区):
US
年份:
2019
代理人:
摘要：
Biometric monitoring devices, including various technologies that may be implemented in such devices, are discussed herein. Additionally, techniques for enhancing GPS speed and distance measurements based on step counts measured by a biometric monitoring device are provided. Such techniques may, in some implementations, involve blending two independently-measured data streams of raw distance traveled—；one based on inter-coordinate GPS coordinate distances and one based on step count and stride length—；using a Kalman filter to provide an enhanced-accuracy measurement of distance or speed traveled. In some other or additional implementations, distances or speeds calculated based on inter-coordinate GPS coordinate distances may be smoothed with a smoothing constant that is proportional to the variance in measured step count.
