The strain transmits to the sensitive grid through a transition area whose range is related to the test strain, which introduces variations to the sensitivity coefficient of the electric resistance strain gauge instead if a commonly considered constant. The test aberration is analyzed due to the variations of the sensitivity coefficient, and offers some methods to reduce its influence.%电阻应变计通过应变过渡区传递应变到敏感栅丝,而此过渡区的范围大小与所测结构的应变有关,使得电阻应变计的灵敏系数发生变化,而非通常测量中使用的常数灵敏系数.讨论了灵敏系数变化对测量结果造成的误差,并给出了降低此影响的方法.
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