摘要
在研究各种工程结构实际受力状态时,必须测量构件上关键部位的应变值,常用的方法是采用应变片,但其测量值受环境温度和湿度影响较大。本文分析了双悬臂梁结构的工作特性,从理论上证明了这种结构用于制作应变测量传感器的可行性与优点,研制出了基于双悬臂梁结构的应变测量传感器,给出了标定试验和混凝土棱柱体试件对比试验结果。实测数据表明,该应变传感器输出数据线性关系好,最大线性误差0.25%;测量数据重复性好,最大误差0.28%。该传感器可广泛应用于各种建筑物构件的应变测量,也可用于大型金属构件的应变测量。
When researching the actual stressed state of different kinds of engineering structures, of which the strain of the key locations must be measured, the usual method is using strain gauge, but the environ ment temperature and humidity have a great influence on the measured value. The working performance of double cantilever beam structure was analyzed, and it was proved the feasibility and advantage theoretically that this structure can be used in producing the strain sensor, and a type of strain sensor based on the double cantilever beam was researched and produced, and the comparative test result between calibration test and concrete prism sample were resented. It was indicated from the measured data that the linear relationship between the measurement data tested by the sensor is fine, and the maximum error is 0.25 % ; the data tested by the sensor are steady, and the repeatability of the data is fine, and the maximum error is 0. 28 %. This type of sensor can be used extensively in strain-measurement for test of various architectural structures, also in large metal structures.
出处
《传感技术学报》
CAS
CSCD
北大核心
2005年第3期589-592,595,共5页
Chinese Journal of Sensors and Actuators
关键词
双悬臂梁
混凝土构件
应变测量
double cantilever beam
concrete structure
strain-measurement
