VISION-BASED MOBILE ROBOT NAVIGATION FOR SUSPICIOUS OBJECT MONITORING IN UNKNOWN ENVIRONMENTS

This study presents the development of mobile robot navigation for detecting suspicious objects in unknown environments. This mobile robot control system combines camera vision and wireless communication. Suspicious object is detected with a camera that is equipped with metal sensor and gas detection. The movement of the mobile robot can be monitored by GUI from the monitoring station. The result shows that the mobile robot can be operated in multi-area tracks such as tiled track, soil track, asphalt track, and paved track. The reliability check of various trajectories has not been done by previous studies. Moreover, the mobile robot is capable of great variations of movement, such as forward, backward, right turn, left turn, right oblique 45 and 135 degree, as well as left oblique 45 and 135 degree. The XBee receiver and transmitter of the mobile robot can be removed in the maximum distance area of 150 meters. The performance of the camera in detecting a suspicious object horizontally and vertically is 10 to 200 degree and 0 to 100 degree respectively. Monitoring suspicious objects can be conducted on objects containing metal and gas with the detection distance of 0.11 m and 480 ppm up to 805 ppm.

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