| 高温应变片关键参数标定方法 |
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| 作者姓名： | 王文瑞 张佳明 闫晓强 孙志辉 |
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| 作者单位： | 1. 北京科技大学机械工程学院, 北京 100083; |
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| 基金项目： | 北京市高等学校青年英才计划;航空科学重点实验室项目;国家重大科学仪器设备开发专项 |
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| 摘 要： | 针对自主研制的自由框架丝栅式高温应变片,建立高温应变片参数高精度标定装置,提出适合可行的标定方法,确定影响高温应变片测量结果的关键参数.根据提出的关键参数标定方法,可以得到高温应变片的灵敏度系数、热输出、零漂和蠕变特性随温度变化的曲线,建立应变测量的精度补偿模型,最终通过应变测量补偿验证并取得可信的结果,表明提出的标定方法准确可行,并可推广到其他形式的高温应变片参数测量中.
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| 关 键 词： | 应变片 高温环境 参数 标定方法 灵敏度 蠕变 |
| 收稿时间： | 2014-10-09 |
Calibration method for the core parameters of high temperature strain gauges |
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| Affiliation: | 1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Research Center for Aerospace Vehicles Technology, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | A high-precision calibration device was established for self-developed free frame wire high temperature strain gauges,a feasible calibration method was introduced,and some important parameters which affect the measuring results were determined. The change curves of sensitivity coefficient,thermal output,zero-drift and creep with temperature were obtained according to the calibration method,and a compensation model was proposed for strain measurement. Verification test results prove that the calibration method is feasible and correct and can be promoted to other forms of high temperature strain gauge parameter measurements. |
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