便携式高精度游标螺旋测微装置测量地表岩石侵蚀速率可行性研究

Feasibility study on measuring surface rock erosion rate with portable high precision vernier helical micrometer

直接测量岩石表面降低的高度是测算当前地表侵蚀速率的有效方法。本文介绍了一种便携式高精度游标螺旋测微装置的组成和原理。在原装置的基础上,增加了"T"型杆和底托套,并利用改造后的装置在唐山地区进行了野外实测试验。本次共测量98个测点,每个测点测量5-15次,获得1005条数据。其中极差小于0.1mm的点共74个,占所有点的75.5%;平均偏差小于0.1mm的点共87个,占所有点的88.8%,标准偏差小于0.1mm的点共86个,占所有点的87.8%,表明该设备在0.1mm数量级精密度良好。通过研究发现,在侵蚀速率较高的地区,利用高精度游标式螺旋测微装置直接在野外测量岩石侵蚀速率具有一定的可行性,并且可以通过改进装置或增加测量点的方法进一步提高测量准确度。

Direct measurement of the height of the rock surface reduction is an effective method to estimate the erosion rate of exposed rocks. In this study, we introduce the composition and principle of a high precision portable vernier helical micrometer measuring device. T-shaped bracket and base sleeve were added to the base of the original device and the improved device has been used for field measurements in the Tangshan area. 98 points were measured, and a single point was repeated 5-15 times yielding a total of 1005 sets of data. There are 74 points with maximum differences of less than 0.1 mm accounting for 75.5% of allmeasure dpoints, 87 points with an average deviation less than 0.1 mm accounting for 88.8% of all measured points, 86 points with standard deviation of less than 0.1 mm accounting for 88.8% of all measured points. Based on our research, we believe that direct measurement of surface rock erosion rate with portable high precision vernier helical micrometer is feasible in some high erosion areas. The measuring accuracy can be further increased by improving the device or increasing the number of measuring points.