摘要
介绍了交流电桥的平衡原理.对电桥的相对灵敏度S做适当的变换,得到电桥的近似相对灵敏度S'.分别对用示波器和交流毫伏表作为平衡指零仪,所组成交流电桥的近似相对灵敏度S'进行测量和计算,并对测量数据进行分析和研究,说明了利用示波器作为平衡指零仪所组成的交流电桥,具有灵敏度高、灵敏度受电源的频率影响小、频带宽等显著优点.
This article briefly describes the balance principle of the alternating current bridge.If we change the relative sensitivity S′ of the current bridge,we've got an approximate relative sensitivity S′.If we measure respectively with an oscilloscope and AC millivoltmeter as a balance indicator,then calculate and analyze the data,we get the result of the research that the alternating current bridge consisting of the oscilloscope as a balance indicator has the significant advantages of a high sensitivity,less effect of the power frequency on sensitivety and wide frequencs band.
出处
《湖北民族学院学报(自然科学版)》
CAS
2013年第1期21-23,共3页
Journal of Hubei Minzu University(Natural Science Edition)
基金
福建省省级教学质量工程项目:三明学院省级物理实验教学示范中心(闽教高[2009]88号)
三明学院精品课程建设项目(ZL1104/JK)
关键词
交流电桥
示波器
交流毫伏表
灵敏度
AC bridge
oscilloscope
AC millivoltmeter
sensitivity