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    • 8. 发明授权
    • Portable ranging system for analyzing gait
    • 便携式测距系统,用于分析步态
    • US5831937A
    • 1998-11-03
    • US833601
    • 1997-04-09
    • Richard F. ff. WeirDudley S. ChildressJoseph N. Licameli
    • Richard F. ff. WeirDudley S. ChildressJoseph N. Licameli
    • A61B5/103G01S11/14G01S11/16G06K9/00G01S15/58
    • G06K9/00348A61B5/1038G01S11/14G01S11/16
    • A portable ranging system for analyzing gait is disclosed comprising a transponder having an infrared receiver and an ultrasound emitter, a base unit having an infrared emitter and an ultrasound receiver, and a computer terminal. During gait analysis, the transponder is worn by a subject at approximately the level of the body center of mass. As the subject walks away from the base unit, the base unit continuously causes, at a constant sampling rate, the ultrasound emitter to emit ultrasound pulses. These ultrasound pulses are received by the ultrasound receiver of the base unit. The computer terminal, by counting during the flight of each ultrasound pulse, is able to calculate the time of flight of each ultrasound pulse, and thus calculate and display in real time the forward progression of the subject. At the end of the walking trial, the computer terminal displays the instantaneous velocity profile, or gait velocigram (GVG), for that trial. From the GVG, the computer terminal calculates and displays gait parameters such as gait speed, cadence, step time, step length, peak-to-peak variation, and time to achieve steady state walking. From the displayed data, gait pathologies can be readily identified.
    • 公开了一种用于分析步态的便携式测距系统,包括具有红外接收器和超声发射器的转发器,具有红外发射器和超声波接收器的基座单元以及计算机终端。 在步态分析期间,应答器在身体质心水平近似被受试者佩戴。 当被摄物体离开基座单元时,基座单元以恒定的采样速率连续地使超声波发射器发射超声脉冲。 这些超声波脉冲由基本单元的超声波接收器接收。 计算机终端通过在每个超声波脉冲的飞行期间进行计数,能够计算每个超声脉冲的飞行时间,从而实时计算和显示被检体的前进进程。 在步行试验结束时,计算机终端显示该试验的瞬时速度曲线或步态速度(GVG)。 从GVG,计算机终端计算和显示步态参数,如步态速度,节奏,步进时间,步长,峰 - 峰变化和实现稳态行走的时间。 从显示的数据可以容易地识别步态病变。