原文传递
Understanding Vibration Injury (September 1, 2011 - August 31, 2015).
| 题名： | Understanding Vibration Injury (September 1, 2011 - August 31, 2015). |
| 作者： | Riley, D. A. |
| 关键词： | Vibration, Occupational diseases, Hand(Anatomy), Arm(Anatomy), Industrial medicine, Countermeasures, Occupational safety and health, Exposure, Lifting, Signs and symptoms, Detection, Monitoring, Human factors engineering |
| 摘要： | This research sought to characterize shock wave vibration and investigate its ability to damage nerves in an animal model simulating hand arm vibration exposure. These studies cannot be performed on humans because of the high potential for hand injury. Shock waves from impact tools contain kHz vibration energy that is 10-50 fold greater than that in the low frequency (30-250 Hz) range typical of sinusoidal nonimpact tools. The ISO 5439 exposure risk calculation reduces acceleration above 16 Hz by progressive frequency weighting so that contributions from frequencies 1.6 kHz (reduced 100 fold) and up are essentially nil. The present research findings challenge this approach because of the high energy generated by impact tools and the occurrence of nerve damage. These results are being used by others working on expanding ISO 5349 with options to factor in kHz vibration. We repurposed an inexpensive piezoelectric sensor to enable measurement of the 5 Hz to 25 kHz power spectrum of vibration magnitudes. This technology has been shared with other researchers investigating shock wave vibration contributions to hand arm vibration syndrome. Instrumenting tools in the work place with broad band sensors has the potential to improve the accuracy of daily vibration exposure and thereby, aiding adjusting work practices to stay below the exposure action value. An intermediate outcome is that workers using impact tools and wearing antivibration gloves can block kHz vibration energy generated by the tool. |
| 报告类型： | 科技报告 |
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