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高中物理试用本中的三个学生实验,都需要用打点计时器。然而,大家从使用打点器的过程中发现,现有的某些产品的技术性能和可靠性还未达到所规定的指标,造成打点周期的等时性变差,或出现漏点,甚至打在纸带上的点子会出现重复性的双点(以下简称“双点”)。因此,增加了实验误差,甚至导致实验失败。我们以 J0203型磁电式打点计时器为例,就如何消除“双点”和提高打点周期的等时性等问题作了一些研究,现介绍如下:J0203型是一种磁电式打点器,其结构如附图1所示,在一胶木底板上装有与电源接线柱连结的激磁线圈,振动片在激磁线圈及永久磁铁的作用下振动,使打点针在纸带上以1/50秒间隔打上一个点子。
High school physics experiment The three students in this experiment, need to use RBI timer. However, when using the RBI, we found that the technical performance and reliability of some existing products have not yet reached the prescribed targets, resulting in the deterioration of the RBI isochronism or the occurrence of leaks and even hitting Points on the tape will appear duplicate double points (hereinafter referred to as “double point ”). Therefore, the experimental error is increased and even the experiment fails. We take J0203 type magnetic timer as an example, on how to eliminate “double point ” and improve the RBI cycle isochronous and other issues made some research, are as follows: J0203 type is a magnetic type RBI The structure of which is shown in FIG. 1, an excitation coil connected with a power terminal is arranged on a bakelite floor plate, the vibration piece vibrates under the action of an excitation coil and a permanent magnet, so that the punching needle is 1/50 on the tape Tick a second interval ideas.