An ultrasonic time-of-flight system for hand movement measurement.
An ultrasonic time-of-flight system for hand movement measurement.
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用于手部运动测量的超声波飞行时间系统。
DOI：
10.1088/0967-3334/16/4/001
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Stelmach,GE
中科院分区：
文献类型：
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作者：
Berners,AC;Webster,JG;Worringham,CJ;Stelmach,GE
作者已经设计并建立了一个超声波飞行时间系统来测量多达三个移动发射器的三维坐标。这些发射器被固定在人类受试者的手和手臂上或手持触笔上，以提供关于运动控制的信息。三个固定的接收器悬挂在实验空间上方，并提供三个对角距离，这些距离被转换为x，y和z坐标。根据实验的性质，一个发射器的采样率为200-400 Hz。多个发射器是时分复用的。压电谐振器发射器以200 V脉冲，每个周期12 μ s，并以40 kHz振铃，Q和因子为4。压电谐振器接收器驱动电路的增益为500，带宽为60 kHz。该系统提供了高度线性的结果，重复性为+或-1.64 mm，分辨率为0.7 mm。
The authors have designed and built an ultrasonic time-of-flight system to measure the three-dimensional coordinates of up to three moving emitters. These emitters are fixed on the hand and arm of a human subject or on a hand-held stylus, to provide information concerning motor control. Three stationary receivers are suspended above the experimental space and provide three diagonal distances which are converted to x, y and z coordinates. The sampling rate for one emitter is 200-400 Hz, depending on the nature of the experiment. Multiple emitters are time-multiplexed. The piezoelectric resonator emitter is pulsed with 200 V for 12 mu s of each cycle and rings at 40 kHz with Q and factor of four. The piezoelectric resonator receiver drives circuitry with a gain of 500 and a bandwidth of 60 kHz. The system provided highly linear results with a repeatability of+ or-1.64 mm and a resolution of 0.7 mm.