Issue 51

K. Li et alii, Frattura ed Integrità Strutturale, 51 (2020) 386-397; DOI: 10.3221/IGF-ESIS.51.28 395 comprehensively analyze the changes of damage in the plan and space. And it is not affected by the environmental factors of the test site and has high adaptability. Type Condition Accuracy(mm) Range Efficiency （ s ） Depth Gocator2080 - - ±0.005mm Level: 0-120° Vertical: 0-2000mm 3 Available HCCK102 light source ±0.01mm 0-8mm 45 - - Paola5385 Professional ±0.03mm 0-150mm 60 - - Table 1 : Measurement performance comparison. C ONCLUSIONS his paper developed a 3D laser scanning structure test measuring device independently, which can widely adapt to the testing conditions of modern structural tests. The 3D laser scanning system consist of a linear slide group and a 2D laser ranging sensor. The stepping motor controls the fine movement of the sliding group screw to realize the lifting and scanning of the laser ranging sensor. The following conclusions were made: 1) The 3D coordinate system of the laser scanning measuring device is established, and the calculation formula for detecting the structure size and elevation data information is obtained. 2) The whole process of developing the scanning system is summarized, including the construction of the bracket system, the construction of the transmission device, the simulation of the control device and the connection and fixing of various parts. 3) Based on the RPC bending fatigue test, the scanning platform of this experiment was compared with the traditional method and DIC technology to verify the reliability and superiority of the operating system. The results show that the system achieves 3D modeling of structural inspection objects compared to other detection techniques. It has stronger environmental adaptability, higher measurement accuracy and lower cost. The developed 3D laser scanning system can overcome the constraints of environmental constraints and hardware equipment, and realize the efficient and accurate measurement of modern structural tests. A CKNOWLEDGMENTS his work was supported by General program of the Natural science foundation project of Heilongjiang province (ZD2019E001), National natural science foundation of China (51778186) and Heilongjiang post-doctoral research foundation project (LBH-Q 15011). R EFERENCE [1] Cha, Y. J., Buyukozturk, O. (2015). Structural Damage Detection Using Modal Strain Energy and Hybrid Multiobjective Optimization. Computer-Aided Civil and Infrastructure Engineering, 30(5), pp. 347-358. [2] Abdeljaber, O., Avci, O., Kiranyaz, S., et al (2017). Real-time vibration-based structural damage detection using one- dimensional convolutional neural networks. Journal of Sound & Vibration,388, pp.154-170. [3] Zhao, L., et al. (2017). A review on measurement technology for structure in civil engineering. Journal of Xi'an University of Architecture & Technology (Natural Science Edition.49, pp. 48-55. [4] Daigoro, I. ( 2018) . Progressive Collapse Analysis of Structures. Numerical Codes and Applications, 12(2), pp.59-66. [5] Zhao, X., Li, Q. (2017). A review on measurement technology for structural testing in civil engineering. J. xi'an Univ. of Arch. &. Tech. (Natural Science Edition), 49(01), pp. 48-55 T T