ADVANCED GRAPHICS TECHNOLOGY: TRACKING

GRIP项目为联合国的先进技术提供了部分支持， 技术跟踪器的工作，是一个客户的跟踪器设计的 这个团队 正如去年所指出的， 因为它不受电磁噪声的影响， Phantom中的电机。 这种电噪声会导致显著的误差 在我们目前的商业磁跟踪器。 新的轻量级 在本报告所述期间早期部署了光学跟踪器， 经过测试，校准和算法改进，在此期间， RMS噪声为0.1 mm的位置和0.03度的报告周期 在定向。 该系统在26 ° C下测量位置和方向。 在30英尺的工作区域内，每秒可进行1500至2000次测量 延迟小于1毫秒。 已经开发了软件 并测试了多个同时运行的跟踪器， 上限（目前n = 2），以支持在 坑 进行了实验以确定最佳模式， 跟踪器天花板瓷砖（跟踪器的LED信标系统位于 图块）用于PIT双用户配置。 我们希望部署 在1998年3月底之前在PIT上安装跟踪器。

The GRIP project has provided partial support for UNC's advanced technology tracker work and is a customer for trackers designed by this team. As noted last year, the UNC optical tracker is attractive in the PIT because it is immune to the electrical noise created by the motors in the PHANToM. This electrical noise causes significant error in our current commercial magnetic trackers. The new lightweight optical tracker was deployed early in the reporting period and has undergone testing, calibration and algorithmic refinement during this reporting period with RMS noise of 0.1 mm in position and 0.03 degrees in orientation. The system measures position and orientation in a 26 by 30 foot working area and makes 1500 to 2000 measurements per second with less than 1 millisecond of latency. Software has been developed and tested for multiple simultaneous trackers operating under the same ceiling (n = 2 currently) to support deployment of this tracker in the PIT. Experiments were conducted to determine an optimal pattern of tracker ceiling tiles (the tracker's LED beacon system is located in the tiles) for the PIT two-user configuration. We expect to deploy the tracker over the PIT before the end of March 1998.