Development of Dynamic Local Work Load Measurement Method Using Electromyography (EMG) (an Experimental Measurement with Drilling Activities)

This paper presents a scheme to build a system of musculosceletal maesurement using Electromyography and for measuring physical dynamic workload of local muscles, i.e., drilling activities. Electro-myography (EMG) can be signal of muscle contractions and provides continous record as the analog signal. The result of this dynamic local workload measurement show a nonlinear relationship between peak level power spectra of EMG signal and torque. the work load for drilling 0.8 mm to 5 mm plate activities ranges between 0,1513 to 1, 6979 Joule

Desain Model Diagnostik Resiko Ergonomi pada Kelapa Sawit secara Manual

Oil palm harvesting activity is mostly done by ‘human power' manual handling, therefore the activity may cause work safety and health problems.This research is deal with anthropometry, motion study andbiomechanic to find out the risk of manual handling and to develop ergonomic assessment model of oil palm harvesting. This model was designed in the aims to find out better work motion, good procedure and better design of harvesting tool, so the manual harvesting can be done in more safe, efficient and productive. The formula for the appropriate distance between harvester's position and the tree and the length of egrek show that oil palm harvesting for more than 16 m bunches's height is not safe with ‘egrek'. Critical load for neck, shoulder and forearm are 21.85 N, 1091.96 N and 1634.31 N. Ergonomic risk assesment's tool of oil palmmanual harvesting was designed with the parameter: appropriate distance (dt), the length of egrek (lp), critical range of motion (CRM) and critical load (CL) for neck, shoulder and forearm