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HOW DIFFERENT VARIABLES AFFECT THE ACCURACY OF HAND-TIMING
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作者 FAN Yi-fang LI Zhi-yu CEN Ren-jing 《生物医学工程研究》 2005年第4期212-217,共6页
To analyze the process of hand-timing and the resulting data collected from the hand-timing computer system(HTCS),including the timing operator′s reaction times of starting and stopping the watch,the results from the... To analyze the process of hand-timing and the resulting data collected from the hand-timing computer system(HTCS),including the timing operator′s reaction times of starting and stopping the watch,the results from the timing,the simulated electronic timing,the major factor that affects the time-keeper′s accuracy of time-keeping were studied,i.e.the stability of the timekeeper′s reaction time,rather than the time-keeper′s reation time.The leading cause that inflicts error between the hand-time-keeping and the electrionic time-keeping consists in the pitfall that the time-keeper makes a wrong judgment in stopping the watch.The analytical results provide theoretic gist for the selection and training of time-keeping operators. 展开更多
关键词 手动定时 定时器 模拟电子定时 动态定时 作用时间 误差 医学应用
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多通道实时远距离人工计时信号采集 被引量:1
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作者 范毅方 聂文良 《光学技术》 CAS CSCD 北大核心 2007年第S1期58-60,共3页
采用光电偶合器、A/D转换器和并行接口芯片等设计数字信号采集系统实现人工计时信号采集,提高人工计时的效率和准确性。计时裁判员独立操作计时器开关产生的开关量信号用屏蔽电缆通过自带电源式插转箱连接到光电偶合器进行光电隔离,再由... 采用光电偶合器、A/D转换器和并行接口芯片等设计数字信号采集系统实现人工计时信号采集,提高人工计时的效率和准确性。计时裁判员独立操作计时器开关产生的开关量信号用屏蔽电缆通过自带电源式插转箱连接到光电偶合器进行光电隔离,再由A/D转换器进行开关量信号的模数转换,最后由并行接口芯片接收,并通过数据总线发送到计算机。用软件控制人工计时信号的采集、计算、处理、存储和输出,从而实现人工记时信号的采集。 展开更多
关键词 应用光学电子学 人工计时 开关量信号 光电偶合器 A/D转换器 并行接口芯片
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