PSI - Issue 60

S.S. Satpute et al. / Procedia Structural Integrity 60 (2024) 525–534 S. S. Satpute et. al./ Structural Integrity Procedia 00 (2023) 000–000

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The Image Acquisition System for Component Integrity Test (IAS-CIT) consists of 3 subsystems namely compact vision control unit ,imaging components such as cameras and lenses and, pan tilt control unit as shown in Fig. 1. Using this system, image sets of two crack tips, load and LLD (in a single image) and, CMOD value will be captured at various stages from the beginning to the end of the experiment.

Fig. 1. Schematic connections of control unit and cameras

2.1. Compact Vision Control Unit This unit is built around Advantech AIIS- 3400 P compact PC. The image acuisition software is installed on this compact unit. The functions provided by compact vision control unit are a) Provides human machine interface for IAS-CIT system b) Controls the image acquisition from cameras c) Provides power supply to the 4 cameras through in built 4 channel PoE card 2.2. Imaging Components; Cameras, Lenses The imaging componenets consists of 4 Teledyne Dalsa cameras along with compatible lenses. a) Load and CMOD Cameras- 1.3 MP monochrome 2/3 inch CMOS GigE vision camera (3 μm pixel size, 30 fps, 62 db dynamic range cameara attached with 25 mm focal length C Mount lens with aperture control) b) TipA and TipB Cameras – 5 MP monochrome 4/3 inch CMOS GigEVision camera ( 6 μm pixel size, 29 fps, 60 db dynamic range camera attached with 50 mm focal length C Mount 4/3 inch megapixel lens with aperture control).

(a) Grid pattern of 5mm×5mm

(b) Grid marks on a typcal crack tip

Fig.2 shows the grid pattern made on the pipe surface ahead of crack tip.