Issue 51

K. Li et alii, Frattura ed Integrità Strutturale, 51 (2020) 386-397; DOI: 10.3221/IGF-ESIS.51.28 392 (a) External (b) internal Figure : 7 Detail of the drive actuator. Parameter setting and automatic data collection The Gocator-2080 laser sensor is connected to the power supply in the control box via a 19-pin cable, connected to the computer by the M12 cable. The scanning speed, exposure and other parameters are set on the laser ranging sensor setting interface. Figure 8 shows a full view of the 3D laser scanning system. The position of the main body of the stent is adjusted, the structure to be inspected in the effective area of the scan is placed , and data automatically is collected. The 3D scan information of the detected object are obtained. And the data storage is completed . Figure 8 : 3D laser scanning system. Application In order to fully verify the reliability and practicability of the structure detection of the 3D laser scanning system. Based on the concrete bending fatigue test, the concrete structure damage detection is carried out. It is the first time, the 3D laser scanning system was used to detect fatigue damage of the structural. • Automatic data collection The structure is located in the scanning sector detection area by adjusting the horizontal position of the holder body. In order to ensure complete structural modeling information, the effective detection range in the vertical direction is greater than the height of the detected object. Figure 9 shows the data acquisition process.