测定电阻应变计灵敏系数的一种方法

采用等强度梁、挠度计、并联电阻箱、电位差计等测定电阻应变计的灵敏系数是一种常用的方法。根据电桥的平衡条件建立了简单易懂的平衡方程，回避了桥臂阻值相对变化率的计算及电桥非线性输出等问题，正确计算了应变计的灵敏系数Ｋ。

Method of Determinating the Sensitivity Coefficient of the Resistance Strain Gauge

Shunting resistance box is a commonly used method in the determination of the sensitivity coefficient of the resistance strain gauge with the equal-strength beam aparatuses. But how to establish the equilibrium equation and calculate the coefficient is a problem needed to be reconsidered. Simple and easy understanding equations are established with the aid of equilibrium condition of the resistance bridge, without involving the approximate calculation of the relative change of the arm resistance and the nonlinear output of the bridge, the coefficients are correctly calculated.