Influence of force and duration on stone tool wear: results from experiments with a force-controlled robot
Influence of force and duration on stone tool wear: results from experiments with a force-controlled robot
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力和持续时间对石器磨损的影响：力控机器人实验的结果
DOI：
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发表时间：
2018
影响因子：
2.2
通讯作者：
J. Buchli
中科院分区：
文献类型：
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作者：
Johannes Pfleging;Radu Iovita;J. Buchli
许多研究表明，微磨损分析可以识别一些参数，例如加工材料和运动方向，并取得不同程度的成功。然而，由于实验传统上是由不受监控的人类进行的，因此我们并不完全了解力在磨损形成中的作用。在这里，我们在受控实验中比较了持续时间与施加的力产生的磨损量，并使用光学图像检查和描述表面形貌的定量参数。我们使用连接到力/扭矩可控机器人手臂上的燧石片，在恒力曲线下刮擦标准化的山毛榉木板。力分布是通过 Pfleging 等人描述的先前刮擦实验获得的。 （PLoS One 10，Pfleging 等人，2015 年）。我们在实验中改变了力量水平和使用持续时间。使用 Alicona InfiniteFocus G4 显微镜对磨损件进行成像，并使用计量学中的区域场参数对薄片的抛光部分进行分析。这些数据可在互联网上公开获取。结果表明，使用时间对抛光效果的影响比力度更大，这证实了 20 世纪 80 年代进行的人体实验中所做的假设。此外，简单的计量高度参数似乎不足以捕获抛光程度。我们的结论是，需要更复杂的定量方法来超越人类对光学图像的主观评估，以重建过去的人类行为。
Many studies have shown that micro-wear analysis can identify some parameters such as worked material and motion direction with varying degrees of success. However, because experiments have traditionally been carried out by un-monitored humans, we do not fully understand the role of force in wear formation. Here, we compare the amount of wear produced by duration vs. applied force in a controlled experiment and using both the inspection of optical images and quantitative parameters describing surface topography. We used flint flakes attached to a force/torque controllable robot arm to scrape standardized beech wooden planks under constant force profiles. The force profiles were obtained by previous experiments in scraping described by Pfleging et al. (PLoS One 10, Pfleging et al. 2015). We varied the force level and use duration among the experiments. Worn pieces were imaged with an Alicona InfiniteFocus G4 microscope and the polished parts of the flakes were analyzed using areal field parameters from metrology. The data is publicly available on the internet. Results indicate that use duration contributes more significantly to polish formation than force, confirming assumptions made in human experiments performed in the 1980s. Moreover, simple metrological height parameters appear inadequate for capturing the degree of polish. We conclude that more sophisticated quantitative methods are required to go beyond the subjective human evaluation of optical images to reconstruct past human action.