Fig. 4. Exterior wall automatic painting robot
The automatic painting robot for exterior wall developed by Inha University in South Korea and Daewoo Institute of Construction Technology can realize automatic painting, as shown in Figure 4. The parts of the robot’s spray painting device include compressor, paint can, brush, flow sensor, paint thickness gauge, and a constant flow control system based on PID to accurately control the velocity of spray painting. Its biggest advantage is that it monitors the surrounding wind speed in real time and automatically changes the suction force of the sucker to ensure that all its operations are carried out stably. After testing, the robot can move spray paint at a speed of 0.11m /s.