应变电测技术中的误差分析及确定方法

The error analysis and the determined method in the electrometric strain test

分析了电测试验中电阻应变片的阻值，灵敏系数Ｋ，导线长度，温度及组桥方式的不同，对测试结果的影响．并通过理论分析，计算及实际结构的测试，得出了应变电测试验中减小误差的方法．

The influence on the result of electrometric test, caused by the impedance of the strain gauge the senstitve coefficient K , the length of the conductiong wire, the temperature as well as the variations of the pattern of the composed bridges is analysed. The method to reduce the error in the electromctric strain test is obtained through the theoretical analysis, calculations and the test on the concrete structures.