Analysis of Muscle Contraction on Pottery Manufacturing Process Using Electromyography (EMG)

International Conference on Engineering and Technology for Sustainable Development 2015

工业技术;经济学

Soewardi, Hartomo^1 ; Rahmayani, Amalia Azka^2

Industrial Engineering Department, Islamic University of Indonesia, Yogyakarta, Indonesia^1

Graduated Stud. in Industrial Engineering Department, Islamic University of Indonesia, Yogyakarta, Indonesia^2

关键词: Focus measurement;    Long duration;    Manufacturing process;    Median frequency;    Muscle contractions;    Musculoskeletal disorders;    Significance levels;    Statistic analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/105/1/012023/pdf
DOI  :  10.1088/1757-899X/105/1/012023

学科分类：工业工程学

来源: IOP

【 摘 要 】

One of the most common problems in pottery manufacturing process is musculoskeletal disorders on workers. This disorder was caused by uncomfortable posture where the workers sit on the floor with one leg was folded and another was twisted for long duration. Back, waist, buttock, and right knee frequently experience the disorders. The objective of this research is to investigate the muscle contraction at such body part of workers in manufacturing process of pottery. Electromyography is used to investigate the muscle contraction based on the median frequency signal. Focus measurements is conducted on four muscles types. They are lower interscapular muscle on the right and left side, dorsal lumbar muscle, and lateral hamstring muscle. Statistical analysis is conducted to test differences of muscle contraction between female and male. The result of this research showed that the muscle which reached the highest contraction is dorsal lumbar muscle with the average of median frequency is 51,84 Hz. Then followed by lower interscapular muscle on the left side with the average of median frequency is 31,30 hz, lower interscapular muscle on the right side average of median frequency is 31,24 Hz, and lateral hamstring muscle average of median frequency is 21,77 Hz. Based on the statistic analysis result, there were no differences between male and female on left and right lower interscapular muscle and dorsal lumbar muscle but there were differences on lateral hamstring muscle with the significance level is 5%. Besides that, there were differences for all combination muscle types with the level of significance is 5%.