...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Biomechanics >Accuracy of non-differential GPS for the determination of speed over ground
【24h】

Accuracy of non-differential GPS for the determination of speed over ground

机译：用于确定地面速度的非差分GPS精度

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Accurate determination of speed is important in many studies of human and animal locomotion. Some global positioning system (GPS) receivers can data log instantaneous speed. The speed accuracy of these systems is, however, unclear with manufacturers reporting velocity accuracies of 0.1-0.2 ms(-1). This Study set Out to trial non-differential GPS as a means of determining speed under real-life conditions.A bicycle was ridden around a running track and a custom-made bicycle speedometer was calibrated. Additional experiments were performed around circular tracks of known circumference and along a straight road. Instantaneous speed was determined simultaneously by the custom speedometer and a data logging helmet-mounted GPS receiver. GPS speed was compared to speedometer speed. The effect on speed accuracy of satellite number; changing satellite geometry, achieved through shielding the GPS antenna; speed; horizontal dilution of precision and cyclist position on a straight or a bend, was evaluated. The relative contribution of each variable to overall speed accuracy was determined by ANOVA. The speed determined by the GPS receiver was within 0.2 ms(-1) of the true speed measured for 45% of the values with a further 19% lying within 0.4 ms(-1) (n = 5060). The accuracy of speed determination was preserved even when the positional data were degraded due to poor satellite number or geometry. GPS data loggers are therefore accurate for the determination of speed over-ground in biomechanical and energetic studies performed on relatively straight courses. Errors increase on circular paths, especially those with small radii of curvature, due to a tendency to underestimate speed. (C) 2004 Elsevier Ltd. All rights reserved.
机译：在许多人类和动物运动研究中，准确确定速度很重要。一些全球定位系统（GPS）接收器可以记录瞬时速度的数据。但是，随着制造商报告速度精度为0.1-0.2 ms（-1），这些系统的速度精度尚不清楚。这项研究着手尝试使用非差分GPS作为在现实生活中确定速度的一种方法。将自行车骑在跑道上并校准定制的自行车速度表。围绕已知圆周的圆形轨道并沿直行道路进行了其他实验。瞬时速度由定制的速度计和数据记录头盔安装的GPS接收器同时确定。将GPS速度与速度计速度进行比较。对卫星号速度精度的影响;通过屏蔽GPS天线来改变卫星的几何形状;速度;对直线度或弯度上的精度和骑车人位置的水平稀释进行了评估。每个变量对整体速度精度的相对贡献由ANOVA确定。 GPS接收器确定的速度在测量值的45％的真实速度的0.2 ms（-1）内，另有19％在0.4 ms（-1）的范围内（n = 5060）。即使位置数据由于不良的卫星数量或几何形状而降低，速度确定的准确性仍得以保留。因此，GPS数据记录器对于在相对笔直的路线上进行的生物力学和能量学研究中确定地面上的速度是准确的。由于趋向于低估速度，在圆形路径上，特别是在曲率半径小的圆形路径上，误差会增加。 （C）2004 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号