Occupational safety issues related to computer equipment installation, maintenance and use

This paper presents the findings of an ongoing INCDPM project developed in collaborations with BB Computers that addresses the occupational safety issues related to computer equipment installation, maintenance and use, with emphasis on risk identification. The method used was The Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA). Using the chart flow and the list of items of this method, a literature search was conducted in Science Direct Freedom Collection, Elsevier database, Web of Science - Core Collection, Springer Link Journals. Keywords such as occupational risks, computer equipment installation, computer maintenance were used to retrieve relevant studies which explicitly reported on occupational risks related to computer equipment installation, maintenance and use. The literature search yielded 900 references, of which 20 articles were selected for full-text screening as specified by the inclusion criteria, and ultimately 10 were included in this review. It was developed an extensive and comprehensive list of occupational risks related to computer equipment installation, maintenance and use. After a classification of the equipment in calculation and processing equipment, electronic displays, printer, special printers network equipment the main risks identified in all categories mentioned above are as follows: electric shock, stress, high workload, slips and trips.

Experimental Study on Voltage Sag Tolerance of LED Electronic Display

Widely used LED electronic displays have high requirements for power quality. Because of the status quo of LED technology update and the lack of related experimental work, this paper first analyzes the hardware composition of LED electronic display and switching power supply module. In addition, the paper points out that the transient tolerance of LED screens is mainly determined by switching power supply modules. Then, a test platform was built, and a certain type of LED screen was selected to investigate the influence of voltage temporary drop value and duration, phase jump, and initial Angle of temporary drop on the tolerance of LED electronic display. It provides data support for evaluating and managing the effects of voltage sags on LED electronic displays and the design of power supply schemes.