Design and Construction of Driving Robot for High Precision Spraying
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Abstract
This research was focused on the development of farming robot for high precision spraying. The robot was designed to work in confined spaces where large machines are inaccessible. Its dimension measured 62 cm long, 63 cm wide and 57.5 cm high. The driving system consisted of two rubber tracks driven by 250W DC motor on each ones. A microcontroller was applied to control the robot by recieving the command via 2.4GHz wireless module that was sent from the wireless control panel. The results of the experiment shown the robot can run at a maximum speed of 1.32 m/s on asphalt road with maximum traction force tested on the asphalt road being 392.4 N. Regarding spraying system, servo motors were used to turn the nozzle heads for adjusting the flow rate and spraying angle as controlled via a microcontroller. Test results showed that relationship between the flow rate and servo pulse width was explained by a polynomial equation. The spraying angle was related to the servo pulse width by an exponential equation. However, the number of the nozzles and operational sequence had effects on the flow rate and the spraying angle. Therefore future research was needed to investigate and obtain equations which could compensate such effects so as to make high precision for the flow rate and the spraying angle.
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