电磁打点计时器是采集物体运动“时空”信息的主要仪器,其工作状态的优劣直接影响实验的成效.然而,中学阶段至今仍缺乏检测电磁打点计时器工作状态的有效方法或工具,借助示波器虽可粗略观察其稳定性,但仍难以准确测定打点的周期,打点情况看似正常的计时器,其打点的稳定性和准确性却未必良好.电磁打点计时器工作状态究竟如何,目前仍只能凭经验和感觉加以判断、调试,这难免有些盲目和随意,必然也会导致人为的实验误差.为准确测试电磁打点计时 Electromagnetic strike timer is the main instrument for collecting “time and space” information of object motion. Its working status has a direct impact on the effectiveness of the experiment. However, in the middle school stage, there is still no effective method or tool to detect the working status of electromagnetic dial timer. Although it is possible to observe its stability roughly, it is still difficult to accurately measure the cycle time of the dotting. The timer that looks like a normal situation may not be good in the stability and accuracy of the dotting point. How exactly does the electromagnetic tick timer work? It can be judged and debugged based on experience and feelings. This will inevitably be blind and random, and it will inevitably lead to artificial experimental errors. To accurately test electromagnetic timing