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当气垫导轨进入中学物理实验室时,颇带有现代科技的光环,但不久,一些学校的气垫导轨就被冷落在一旁.究其原因,在于同气垫导轨配套的计时器技术上的落后.它操作复杂、没有记忆功能,使用很不方便,与当今的电脑时代极不相称.针对中学物理教学的实际需要,我们设计制作的自分段计时测速仪取代了气垫导轨原有的计时器.自分段计时测速仪操作简便、稳定可靠、精度高、体积小、成本低、多功能计时测速,成为气垫导轨的智能助手.自分段计时测速仪由光敏传感电路和主机组成.传感电路置于主机之外.这一部分技术对实验教师透明,以利于实验教师排除故障、更换器件、调整电路参数、设计新的实验.
When the air-cushioned rails entered the middle school physics laboratory, it was accompanied by a halo of modern technology. However, some schools’ air-cushion guide rails were soon left behind. The reason was that the timers associated with the air-cushioned rails were backward. The operation is complicated, there is no memory function, and the use is very inconvenient. It is not commensurate with the current computer age. For the practical needs of middle school physics teaching, we designed and manufactured the self-sectioning chronograph to replace the original timer of the air-cushion guide. Chronograph is easy to operate, stable and reliable, high precision, small size, low cost, multi-function timing and speed, become an intelligent assistant of the air-guide rail. Self-timer speedometer consists of photosensitive sensor circuit and host. The sensing circuit is placed on the host. In addition, this part of technology is transparent to experimental teachers to facilitate experimental teachers to troubleshoot, replace devices, adjust circuit parameters, and design new experiments.