フリッカー値による自動車, 自動二輪車乗務作業の分析

概要

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It is reported that the flicker value shows physiologically a sine curve with 24 hours as a period and this fluctuation is influenced in accordance with the work loads and other factors. (Oshima and others) The author, in order to examine these points, selected nightshift members of car patrol section for studying conditions of physiological fluctuation, and dayshift members of motorcycle policemen for examining the maximum limit of actual working hours as indicated from the disturbance of fluctuation. Total members of the car patrol section were 53 male persons of the age between 25 and 35 years while the motorcycle policemen were in all 70 male persons of the age between 23 and 28 years. The former examination was conducted in May and the later in November. The results obtained could be summarized as follows. 1. In the case of car patrol section members, no remarkable distrubance on the physiological fluctuation of the flicker value was observed. 2. In the case of motorcycle policemen, both daily and weekly flicker values showed a heavy decrease. 3. In order to avoid such disturbances it is recommended that the actual working hours of the motorcycle policemen should be restricted to 3 hours and 18 minutes in a day.