Exposure status of welding fumes for operators of overhead traveling crane in a shipyard
نویسندگان
چکیده
منابع مشابه
Measurement and Modeling of Job Stress of Electric Overhead Traveling Crane Operators
BACKGROUND In this study, the measurement of job stress of electric overhead traveling crane operators and quantification of the effects of operator and workplace characteristics on job stress were assessed. METHODS Job stress was measured on five subscales: employee empowerment, role overload, role ambiguity, rule violation, and job hazard. The characteristics of the operators that were stud...
متن کاملDesign and Comfort Evaluation of a Novel Locomotion Device for Training Overhead Traveling Crane Operators in a Virtual Environment
The development of locomotion devices that provide users a sense of walking while their positions remain localized in the physical world is still one of the major problems in current virtual reality research. This paper presents the design and evaluation of a novel locomotion device for training the overhead traveling crane operators in a virtual environment. The locomotion device employs a cir...
متن کاملAnti-Swing Fuzzy Control of Overhead Traveling Crane
A new fuzzy controller for anti-swing and positioning control of an overhead traveling crane is proposed based on the SIRMs (Single Input Rule Modules) dynamically connected fuzzy inference model. The trolley position and velocity, the rope swing angle and angular velocity are selected as input items, and the trolley acceleration as output item. With a simple structure, the controller can auton...
متن کاملBronchial reactions to exposure to welding fumes.
OBJECTIVES To study the airway response and its mechanism to welding fumes in six welders with respiratory symptoms. METHODS Methacholine and welding challenge tests were carried out. The concentration of welding fumes during the exposure test was measured. On two subjects who developed bronchoconstricition to welding challenge, additional tests were carried out including prick, patch, and in...
متن کاملAnti-swing Fuzzy Controller Design for a 3D Overhead Crane
This paper proposes a simple but efficient technique to control 3D overhead crane. Load must track a desired path and not sway more than a reasonable range.The proposed method uses PID control for trolley to track the desired path and fuzzy control compensation to eliminate the load swing. Only the projection of swing angle is applied to design the fuzzy controller. No plant information of cran...
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ژورنال
عنوان ژورنال: Journal of Korean Society of Occupational and Environmental Hygiene
سال: 2015
ISSN: 2384-132X
DOI: 10.15269/jksoeh.2015.25.3.301