Abstract:
Biomechanics is an approach to evaluate workloads in order to decrease risk of harmful or dangerous occurred in worker body by using Photogrammetry and Mechanics to calculate force and joint moment in worker body. Nowadays, the analysis uses computer and digital camera. With the advance technology, Tablet is the new innovation device which combines computer and digital camera properties with finger touch screen or digital pen. Researcher develops biomechanic program on tablet which the aims of this study were 1. to design and test 2-D biomechanical static program on tablet to calculate joint force and joint moment and 2. to evaluate the program between using finger and digital pen on tablet and using mouse on computer. User can draw a free body diagram over the picture of worker and can add magnitude and direction of external force freely that it is different from other programs in present. The testing conditions were set at brightness of 250 lux and distance of capture of 6 meters. The results of program showed that the net moment was not significant different between using finger and using digital pen on tablet, and using mouse on computer at .05 confidence levels. Moreover, the results from measurement of Gage Repeatability and Reproducibility (Gage R&R) by ANOVA method based on 5 users were 0.98% and 0.95% of Precision-to-Total Variation, P/TV by using finger and using digital pen, respectively. It is less than 10% showed that the program were precise and accepted. KEYWORDS: Biomechanical, Joint force, Joint moment, Joint Strength, Statics