Radio Frequency Motion Tracking System

射频运动跟踪系统

• 批准号: 6582576
• 负责人: DAVID P ENGSBERG
• 金额: $ 9.98万
• 依托单位: DPSYSTEMS
• 依托单位国家: 美国
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-05-01 至 2004-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6582576
• 关键词: actigraphy; bioengineering /biomedical engineering; biomedical equipment development; monitoring device; radiowave radiation; sound frequency

DESCRIPTION (provided by applicant): Presently, limitations of 3D motion capture systems used in the medical field, sports analysis, and in special effects for movies and video games Include: l) indirect Identification of markers, 2) minimum of 2 video camera requirement to capture any marker, and 3) loss of valuable data due to occlusions and merging. The Doppler properties of radio frequency (RF) signals, and digital and wireless communication technologies can overcome these limitations. This investigation will use the Doppler shift of an RF signal and digital communication techniques to develop a low cost, highly accurate and versatile 3D motion capture system. Specific Aim I: Develop/Test 2D Angle Measurement. Task 1: Build the 2D device. A Doppler transmitter unit will be constructed to send an RF signal to a miniature receiver sensor. Virtual movement of the transmitting antenna creates a Doppler shift in the signal at the receiver sensor. Task 2: Evaluation of the 2D device. The ability of a transmitter receiver unit to measure angle will be systematically tested using known angular positions, and both static and dynamic tests. Specific Aim II: Develop/Test 3D Position Measurement. The basic transmitting-receiving system developed in Aim 1 to measure angle will be expanded in Aim 2 to determine 3D position and orientation. Task 1: Build the 3D device. A Doppler transmitter unit, rotating in two orthogonal planes (vertical and horizontal) and a receiver sensor triad will be used to capture 3D position and orientation. The known separation between the sensor triad antennas and the signals it receives will be the basis for the 3D position and orientation calculations. Task 2: Evaluation of the 3D device. The ability of a transmitter-receiver system to measure position and orientation will be systematically tested using known positions, and numerous static and dynamic tests.

描述(申请人提供)：目前，3D运动捕获系统在医疗领域、体育分析以及电影和视频游戏的特效中的局限性包括：L)间接识别标记，2)至少需要2个摄像机才能捕获任何标记，以及3)由于遮挡和合并而丢失有价值的数据。射频(RF)信号的多普勒特性以及数字和无线通信技术可以克服这些限制。这项研究将利用射频信号的多普勒频移和数字通信技术来开发一种低成本、高精度和多功能的3D运动捕获系统。 具体目标一：开发/测试2D角度测量。任务1：构建2D设备。将建造一个多普勒发射器单元，将RF信号发送到微型接收器传感器。发射天线的虚拟运动在接收器传感器处的信号中产生多普勒频移。任务2：评估2D设备。发射机接收器单元测量角度的能力将使用已知的角度位置以及静态和动态进行系统测试 测试。 具体目标二：开发/测试3D位置测量。在目标1中开发的测量角度的基本发射-接收系统将在目标2中扩展，以确定三维位置和方向。任务1：制作3D设备。一个在垂直和水平两个垂直平面上旋转的多普勒发射器单元和一个接收器传感器三位一体将用于捕获3D位置和方向。传感器三合一天线和它接收到的信号之间的已知间隔将成为3D位置和方位计算的基础。任务2：评估3D设备。将使用已知位置以及大量静态和动态测试来系统地测试发射机-接收器系统测量位置和方向的能力。