A study of the effects of construction labor's mental workload under different musculoskeletal workload

• Main Authors: Jhih-kai Lin, 林智凱
• Other Authors: Wen-ta Hsiao
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/14549884064102324184

碩士 === 朝陽科技大學 === 營建工程系 === 104 === With the technological advances after the industrial revolution, mechanization and automation have gradually reduced physical effort. However, in construction industry, due to the limited extent of the assistance of automated machinery, many works still need to be done by human, and human labor plays an important role in construction industry. In addition, the environment of construction site is more complicated than that of general manufacturing. The working environment and works change along with the work schedule. Construction labors need to pay great concentration in work. If they bear so much mental workload in work that they cannot focus on their immediate job or cannot reach the quality of work they should do, they will be exposed to risks. By laboratory experiment, this study first established pre-tests by a series of complete and systematic modules conducted by volunteer subjects. Then 12 subjects including 6 males and 6 females were recruited to take part in the experiment; four Action Categories, i.e. AC1 to AC4, were developed on the basis of Ovako Working Posture Analyzing System (OWAS) and musculoskeletal workload; infrared temperature thermal imager (thermography) was used to record the changes of the temperature of the face and nose tip of the testees; and finally the testees each were asked to fill out a NASA-TLX questionnaire on self-assessment of mental workload. The results and the analysis of the temperatures of the nose tip of the testees as recorded by infrared temperature thermal imager (thermography) showed that OWAS's AC3 tasks could be obviously distinguished from AC1, AC2 and AC4's, and the difference is significant. When AC3 tasks were conducted, testees' mental workload is the heaviest. A probing into the features of AC3 actions should be able to have an effective application to improving the assessment of the postures of construction labors.