DEVELOPMENT OF FATIGUE CRACK DETECTION MONITORING USING LPWA

Abstract

 In actual bridges, fatigue cracks are detected by magnetic particle testing, when the crack in the paint is observed. However, the investigation of fatigue cracks needs much cost. Therefore, low-cost and remote fatigue crack detection techniques are required. In this paper, a fatigue crack monitoring system using IoT was proposed and developed a strain logger using a single board computer and a strain amplifier shield. This device can measure the strain for a long time and transmit the recorded data via LPWA (Low Power Wide Area). It was confirmed that the fatigue crack initiation and propagation were able to monitor fatigue tests using the developed strain logger. In addition, it was shown that the developed device can be long-term monitoring with a battery.