摘要
利用普通物理实验室的常见器材,如千分尺、变阻箱、检流计、电阻丝、导线等,根据螺旋放大、电桥平衡原理设计了螺旋电桥式测微仪.介绍了该装置的原理、使用方法和测量效果.
This paper detailed the principle,operating instruction and measurement effect of a screw bridge micrometer,according to screw amplification and electric bridge amplification principles,assembled by ordinary parts in a college physics lab,such as micrometer,rheostat,galvanometer,resistance wire,conductors,and etc.The combined use of screw amplification and bridge amplification greatly increased the enlargement factor and improved the accuracy of measurement.
出处
《物理与工程》
2011年第6期29-31,共3页
Physics and Engineering
关键词
机械放大
电桥
双臂电桥
测量
mechan-amplifier
electric bridge amplification
double bridge
measurement
