The Internet of Things(IoT) system for Bolt looseness detection in coal mines

Intelligent industry was also called Industrial In-ternet of Things, which combines Internet of technology and traditional manufacturing modes, has played a positive role in Industrial production. Bolt connection plays an important role in coal mine machineries. A set of bolt looseness detection Internet of Things based on wireless Zigbee technology was designed in this article, and the three-dimensional finite element model of Hall sensor in COMSOL Multiphysics field is also established. We also design an installation method of the wireless Bolt Looseness sensor. ZigBee technology was adopted between end devices attached to bolts and the coordinator attached to bracket controller to establish a comprehensive monitoring platform conducive to timely decision-making and analysis. Hall sensors are deployed in the monitoring area in a certain number and scale, and the data monitored by sensor nodes are sent to the coordinator through wireless transmission. This sensor IoT system can detect bolt looseness in real time, which solves the problem that the large number of bolts to be monitored and difficulty in determining the position of looseness bolts.