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发明名称
多频率电火花计时器
摘要
一种多频率电火花计时器,有两根外放电针的盒式结构,属于高中物理教学实验仪器。它的电路特征是以市电全波整流作为电源,利用其π相位信息,经以555集成电路为中心的单稳分频电路,以2倍市电频率为基频进行分频的计时火花的开关信号控制电路,控制高压脉冲发生电路,其特征是高压包的线圈骨架为多槽结构,分别由绕线槽和引线过渡槽组成,进出线口互相错位,有效地提高了电压等级。该计时器在力学实验的描迹计时中具有更广泛的适用性。
申请公布号
CN2357385Y
申请公布日期
2000.01.05
申请号
CN97225843.4
申请日期
1997.09.10
申请人
国家教育委员会教学仪器研究所
发明人
金毅;李俊伦
分类号
G09B23/18
主分类号
G09B23/18
代理机构
代理人
主权项
1、一种盒式结构多频率电火花计时器,其电路包括:一个桥式整流电路,其输出的一路经R2降压、V1与V2箝位成矩形波,其高电平经V3对C1充电后作为集成电路555的电源,其低电平经R4到555的2脚触发单稳电路翻转,时间常数由555电路6、7脚的R6及C3、C4、C5等决定;另一路经S1进入高压脉冲形成电路,由接到555的3脚经C6与V5的微分电路触发可控硅V7导通脉冲变压器L1的原边,在其副边形成脉冲高压火花放电。
地址
100080北京市海淀区海淀路163号国家教育委员会教学仪器研究所金毅转
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