Laser & Optoelectronics Progress, Volume. 58, Issue 23, 2312002(2021)
Improvement and Realization of Field-of-View Splitting Optical Extensometer
Figures & Tables(8)
Fig. 1. Measurement principle. (a) Construction of optical extensometer; (b) schematic diagram of rhombic
Fig. 3. Specimen and lens. (a) Stainless steel tensile specimen; (b) 0.5X telecentric lens
Fig. 4. Improved FOV splitting device diagram. (a) Side view; (b) front view; (c) inner view
Fig. 6. Strain results of specimen. (a) Axial strain of the proposed extensometer in the first test; (b) RMSE of strain errors in the eight tests
Fig. 7. Measured strain-time curve. (a) Conventional optical extensometer; (b) improved optical extensometer
Table 1. Strain error statistics of proposed extensometer in eight repeated tests
View tableTable 1. Strain error statistics of proposed extensometer in eight repeated tests
1 2 3 4 5 6 7 8 Maximum error /με 2.53 3.58 2.05 2.22 1.78 1.02 3.11 2.13 RMSE /με 0.97 1.24 0.97 1.27 0.82 1.05 1.38 1.05
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Feipeng Zhu, Jian Gu, Runzhi Lu, Jin Tao, Pengxiang Bai, Dong Lei. Improvement and Realization of Field-of-View Splitting Optical Extensometer[J]. Laser & Optoelectronics Progress, 2021, 58(23): 2312002
Paper Information
Category: Instrumentation, Measurement and Metrology
Received: Mar. 10, 2021
Accepted: Mar. 23, 2021
Published Online: Nov. 18, 2021
The Author Email: Feipeng Zhu (zhufeipeng@hhu.edu.cn)
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