Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, 901 87, Umeå, Sweden.
Int Arch Occup Environ Health. 2010 Mar;83(3):283-90. doi: 10.1007/s00420-009-0498-2. Epub 2009 Dec 5.
To quantify variance components of hand-arm vibration exposure from data collected in a laboratory study of four different angle grinders.
Four different angle grinders were sent to seven laboratories for grinding tests by three operators at each laboratory. Vibration in both the throttle and support handles was measured. For one grinder, the experimental set-up was repeated and two measurements were collected for that specific grinder.
At least one-third of the estimated variability is attributable to the wheel and less than one-third to the operator. In repeated experiments, between-occasion, operator and wheel factors explained 4, 29 and 17% of the total variability, respectively.
Since measured vibrations in the support and throttle handles are significantly differed, measurements should be taken at both locations. Factors influencing vibration variability include the presence/absence of an auto balance unit, wheel and operator, but other factors remain to be elucidated.
从一项针对四种不同角磨机的实验室研究中收集的数据，量化手-臂振动暴露的方差分量。
将四台不同的角磨机送到七个实验室，由每个实验室的三名操作人员进行打磨测试。油门和手柄都测量了振动。对于一种特定的磨床，重复了实验设置，并对该磨床进行了两次测量。
估计的可变性至少有三分之一归因于砂轮，不到三分之一归因于操作人员。在重复实验中，操作间、操作人员和砂轮因素分别解释了总变异性的 4%、29%和 17%。
由于在支撑和油门手柄上测量到的振动明显不同，因此应在两个位置进行测量。影响振动变异性的因素包括自动平衡单元、砂轮和操作人员的存在/不存在，但其他因素仍有待阐明。
