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首页> 外文期刊>Vibration >An Investigation of the Effects of Drill Operator Posture on Vibration Exposure and Temporary Threshold Shift of Vibrotactile Perception Threshold
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An Investigation of the Effects of Drill Operator Posture on Vibration Exposure and Temporary Threshold Shift of Vibrotactile Perception Threshold

机译：钻机姿势对振动暴露振动暴露效应及近阈值阈值的调查

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The present study involved performing an experiment to clarify whether vibration measurement values on the tool handle, in accordance with ISO 5349-1, can assess risk from workplace environments. The study investigated the relationship between the vibration magnitude of a hand-held electric drill with different operating postures. The experiment included the determination of the participant’s temporary threshold shift (TTS) of vibrotactile perception threshold (VPT) at the tip of the index finger. The experimental hypothesis was that the vibration measurement values on the tool handle, in accordance with the ISO 5349-1 standard, include the effect of posture on the vibration measurements obtained despite the variation in posture and test participants. The hand-transmitted vibration (HTV) was applied using a hand-held electric drill applied to a pre-cast concrete paving slab substrate (600 × 600 × 50 mm, 55 MPa) using a 10 mm diameter masonry drill bit (without hammer action). The tool was operated using the right hand on twelve male subjects with three working postures (n = 36). Vibration was measured in three orthogonal directions according to the international standard ISO 5349-1 procedure. Vibration magnitudes were expressed as root-mean-square (r.m.s.) acceleration, frequency-weighted using the Wh frequency weighting. Clause 4.3 states that the characterisation of the vibration exposure is assessed from the acceleration of the surface in contact with the hand as the primary quantity. The experimental results indicate that the TTS following vibration exposure is not related to the measured vibration magnitude on the tool handle. Therefore, the automatic inclusion of posture and test participant variation is not proven. The results suggest that the vibration measurement values on the tool handle do not predict the TTS after hand-transmitted vibration in varying posture across the test participants. The research concludes that tool handle vibration measurement, in accordance with ISO 5349-1, does not properly assess the potential hazard from authentic workplace tool usage conditions of varying postures.
机译：本研究涉及进行实验，以阐明刀柄上的振动测量值是否根据ISO 5349-1，可以评估工作场所环境的风险。该研究调查了具有不同操作姿势的手持电钻的振动幅度之间的关系。该实验包括在食指的尖端处确定参与者的临时阈值移位（TTS）的振动感应阈值（VPT）。实验假设是根据ISO 5349-1标准的工具手柄上的振动测量值包括尽管姿势和测试参与者的变化所获得的姿势对振动测量的效果。使用10 mm直径的砌体钻头（没有锤击动作）。使用具有三个工作姿势的十二名男性受试者（n = 36），使用右手操作该工具。根据国际标准ISO 5349-1程序，在三个正交方向上测量振动。振动幅度被表示为根均线（下午/分）加速度，使用WH频率加权频率加权。第4.3条表示振动暴露的表征由与手接触的表面的加速度评估为主要量。实验结果表明，后续振动暴露的TTS与工具手柄上的测量振动幅度无关。因此，姿势和测试参与者变异的自动包含并不证明。结果表明，在测试参与者跨越测试参与者的变化姿势之后，工具手柄上的振动测量值不会预测TTS。该研究得出结论，工具手柄振动测量，根据ISO 5349-1，不正确地评估来自不同姿势的真实工作场所工具使用条件的潜在危险。

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