Abstract
Thermal imaging has its own rapid change and development, both in theory and application. Starting from their military research extended to different real-life applications. This work represents the thermal topographical maps of the thermal image based on the direct projection for material thermal inspection. The test set here uses a square cross-sectional shaft that has been heated to around 200 o C and then measures 9 projections angle of 45o thermal images with an infrared (IR) thermal camera. The final thermal images were analyzed and rearranged to understand the thermal behavior of the shaft with the aid of cooling. The results show that a local slice C_22 indicates twice times in two different projections (2 and 9) with significant differences in temperature with respect to the real measured values. Also, layer C_28 shows the highest temperature difference before about 2.51 o C in projection 4 more than all the other layers. These represent an abnormal behavior for the slices or the local positions mentioned above, which may need more mechanical inspection to confirm the results. The mechanical topographical specifying the projection and slice position will increase the percentage of correctness of local and global assessments for test samples.
Highlights
Innovation advancements in infrared imaging have encouraged the utilization of thermal imaging in an expanding number of fields [1, 2]
Thermal imaging cameras are able to capture the IR radiation produced from the measured subject and to change it into a radiometric thermal imaging that is a digital map of the apparent temperature distribution of the subject itself [5]
The regions of interest (ROI) for the map below are classified into the following regions according to the temperature variation, these regions are: with mean values of 30.8o C, 37.3o C, 36.4o C and 32.0o C, respectively. b
Summary
Innovation advancements in infrared imaging have encouraged the utilization of thermal imaging in an expanding number of fields [1, 2]. IR cameras were used to measure the cooling process of a hot square cross-sectional shaft by measuring the temperature of the four faces from nine different projections. The temperature distribution appears upon the surface of the measured object is an important indication for the internal structure behavior toward the thermal energy. We introduce an active approach test by heating a shaft with a square cross-sectional area and measuring the thermal energy dissipated from it by describing the temperature in the nine topographical positions. 4. Start to measure the temperature by capturing an image where the shaft was in a normal position (this surface will be considered as surface number 1), as shown in fig. This inspected area has a matrix size of (26 x 44) which represents approximately a cell of (0.5mm by 0.5mm) per each line from the heat map
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