TY - JOUR N2 - Real-time monitoring of deformation of large structure parts is of great significance and the deformation of such structure parts is often accompanied with the change of curvature. The curvature can be obtained by measuring changes of strain, surface curve and modal displacement of the structure. However, many factors are faced with difficulty in measurement and low sensitivity at a small deformation level. In order to measure curvature in an effective way, a novel fibre Bragg grating (FBG) curvature sensor is proposed, which aims at removing the deficiencies of traditional methods in low precision and narrow adjusting. The sensor combines two FBGs with a specific structure of stainless steel elastomer. The elastomer can transfer the strain of the structure part to the FBG and then the FBG measures the strain to obtain the curvature. The performed simulation and experiment show that the sensor can effectively amplify the strain to the FBG through the unique structure of the elastomer, and the accuracy of the sensor used in the experiment is increased by 14% compared with that of the FBG used for direct measurement. L1 - http://www.czasopisma.pan.pl/Content/108100/PDF/art12.pdf L2 - http://www.czasopisma.pan.pl/Content/108100 PY - 2018 IS - No 3 EP - 587 DO - 10.24425/123899 KW - fibre Bragg gratings KW - curvature sensor KW - large structure parts KW - deformation monitoring A1 - Liu, Ming-Yao A1 - Zhou, Shi-Guang A1 - Song, Han A1 - Zhou, Wei-Jian A1 - Zhang, Xiong PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 25 DA - 2018.10.01 T1 - A novel fibre Bragg grating curvature sensor for structure deformation monitoring SP - 577 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/108100 T2 - Metrology and Measurement Systems ER -