The Investigation on the Sensitivity and Error of Single Bridge
Power Electronics and Design（2010）
摘要
By using two kinds of methods the formula on the relative sensitivity of single bridge is given. All factors affecting relative sensitivity are analyzed. The sensitivity of slide bridge and its influence on the measured resistance Rx are discussed. The condition of the minimum relative error is theoretically given. That is the place of the balance point should be chosen according to the ratio of the measured resistance Rx to the internal resistance Rg of the galvanometer in order to get the minimum relative error. Thereby, the theoretical evidence is offered to cut down experimental error by choosing best ratio N.
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关键词
internal resistance rg,measured resistance rx,theoretical evidence,single bridge,minimum relative error,relative sensitivity,experimental error,balance point,slide bridge,best ratio,galvanometers,sensitivity analysis,sensitivity,galvanometer,measurement error,resistance,measurement uncertainty,metrology,relative error
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