Development Of Vision Based Measurement Device For Rapid Upper Limb Assessment (RULA)

Razif , Nurulfizah (2015) Development Of Vision Based Measurement Device For Rapid Upper Limb Assessment (RULA). Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Nowadays a lot of factories have been established all around Malaysia. This factory has given big contribution in the development of the country. The main role in the contribution made by this sector is their worker. Without them a factory cannot operate. But these workers are always facing health problems such as bodily injury. To overcome this problem an ergonomic evaluation was being conducted for each of the worker. One of this evaluation is the RULA table. However, these assessments are taken manually. Therefore the reading that being taken are not consistent. Hence a vision system that can solve to this problem was proposed. Besides, these vision system also able to detect the local object. This vision system provides a new ways to collect the RULA data. There will be three main objectives of this project. The first objective is to develop a vision based system that can measure the position of the human body. The second objective is to determine local object, a local object that wanted to be located. And the last is to analysis accuracy and latency of the system. To achieve all three objective additional experiments were conducted. The first experiment is a DC motor with different speed was used to test the latency and a fixed angle was drawn on a paper was used to test the accuracy of the system. The second experiment is, three participants was volunteered to do the experimental test. A yellow ping Pong ball attached to the part of the participant body. They require to make the body posture base of the RULA sheet. Then the vision system detects the yellow pings Pong ball and produce the angle of the posture that being made by the participant. Angle produce by the vision system is the data required. The third experiment is, the color algorithm coding was used in order for the vision system detecting the local colored object. At the end of these projects a vision system manages to measure the position of the human body with the analysis of accuracy with the error 0.933˚ and latency with standard deviation for both speed is 26.939 and 28.907 was successful produced

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