惠斯登电桥的应用

• 作 者: R.M.Shaw
• 出 处: 国外电工仪表
• 发表日期: 1967年03期
• 关键词: 惠斯登电桥 分辨力 插入法 标称值 直读式 十进 电阻 平衡电桥 比较器 检测器

(一)比较匹配电阻仪表的维修,设计和应用上经常需要对标称值相等的电阻进行比较以获得匹配。为此目的,可将5度盘惠斯登电桥直接用作0.001％分辨力的比较器,而用检测器插入法可获得约百万分之一的分辨力。为了达到这个分辨力,需要—外接的十进电阻组合。实际上,这个方法是将电桥用作直读式比率装置,而未知电阻匹配得越接近,则测定越为精确。

(A) comparison of resistance meter repair, design and application often need to compare the nominal resistance equal to get the match. For this purpose, a 5-degree disc Wheatstone bridge can be used directly as a 0.001% resolution comparator, with detector insertion gaining about a millionth of a resolution. In order to achieve this resolution, you need - an external combination of ten resistance. In fact, this method uses the bridge as a direct-reading ratio device, and the closer the unknown resistances match, the more accurate the measurement is.