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| Calibration Method of Strain Sensor Metrological Characteristics |
| YUAN Xing-qi1,CHEN Kai1,2,CUI Jian-jun2,YAN Yong-gang1,SHU Hong-lin1,SHEN Xue-ping2 |
1. School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China
2. National Institute of Metrology, Beijing 100029, China |
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Abstract In order to evaluate the metrological characteristics of strain sensor (strain gauge) reasonably, the differences of the metrological characteristics in the relevant national standards and technical specifications of the strain gauge were analyzed, and the vibrating wire strain gauge was taken as an example to sum up the metrological characteristic parameters of the strain gauge. The existing status quo of strain gauge calibration was studied, and a high precision calibration device based on laser interferometry was designed, whose gauge range could reach 500 mm. Then a set of high-precision calculation methods of metrological characteristics was proposed. The characteristics of the strain sensor were tested by experiments, and the uncertainty of the calibration of the integrated error U=0.10% (including factor k=2) was evaluated.
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Received: 13 February 2018
Published: 06 November 2018
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2018, Vol. 39 
