The Application of Vibration Sensors and Position Tracking in the Use of Chainsaws

Abstract

This study reports on the development of a chainsaw tracking device to monitor worker behavior, measure the vibrations in the device, and track their location. The device incorporates a microcontroller board, a 3-axis vibration sensor, a GPS module, a data logging module, a power switch, and a status LED as its main components. The device uses a Print Circuit Board (PCB) of dimensions 50 mm x 70 mm as its base and is installed on the right-hand guard of the chainsaw. The results show that the positioning error of the device was most the most in the morning. The inclination value can be used to clearly distinguish between the work activities. The vibration was tested with two different species: Pterocarpus macrocarpus and Litsea glutinosa. It was found that the felling of Pterocarpus macrocarpus had an average vibration of 9.9 m/s² and vibration force in falling Litsea glutinosa was 8.9 m/s². It was concluded that the hardwood exhibited a higher level of vibration than softwood, and that the vibration force could depend on the tree species and the sharpness of chain teeth. The measured data can be used to plan forest management, timber harvesting monitoring, and in improving timber traceability.