Location Information Measurement Experiment Involving Chemical Rescue Team Trainers Using RSSI and Trilateration

Training evaluations related to chemical terrorism rely on videos that are shot with action cameras and smartphones, making objective evaluations difficult owing to blocked visibility, haze, and the inability to accurately track location. Accordingly, to objectively analyze the movement path and training capabilities of chemical rescuers indoors, an experiment was conducted to measure the location information of chemical rescuers using the received signal strength indicator (RSSI) triangulation method and analyze location accuracy by installing beacons indoors for accuracy analysis. The experimental results showed that the error rate ranged from a minimum of 11.6% to a maximum of 60.5% when Type A beacons were installed, and the error rate increased from 58.1% to 95.5% for each lap. In most cases of Type B beacon installation, the error rate was below 18.5%, and when beacons were not installed, the error rate per lap gradually increased from 44.6% to 100%. Because RSSI communication is subject to location communication variables owing to obstacles such as indoor walls, if the accuracy of RSSI communication is increased by installing a location direction beacon to reduce these variables, it can be used as objective data in evaluating the location of training members.