W.Y. LeongJames Ee2025-01-032025-01-032012-01-2410.4028/www.scientific.net/AMM.152-154.1685https://dspace-cris.utar.edu.my/handle/123456789/9863A warehouse management system using the three-dimensional location tracking and positioning system based on time-of-flight principle is presented in this paper. Integrating three distance measurement sensors and computer programming to process the signals obtained from the sensors, the system can capture, store, and retrieve the three-dimensional position of steel coils located in a warehouse in real time. Updated information will also be stored in a database as a backup. Experiment shows that the system designed in this paper has the merits of real-time tracking of steel coils stored in a warehouse, or any uniformed storage locations.journal-article