作图法求直线斜率取点远近的探讨

The Research of Far and Near Point Coordinates for the Slope of a Straight Line Using Graphical Solution

本文以力敏传感器定标数据为例,使用origin软件对数据进行了直线拟合。在作图法拟合的直线上,选取离中值点较远处和较近处坐标点,计算得到靠近两端离中值点较远处坐标点斜率的误差远小于离中值点较远处坐标点斜率,通过误差杆理论分析了其中的缘由。

In this paper, the calibration data of force sensor was fitted a straight line using Origin software. Far points and near points were selected in the fitted straight line, and the slopes had been calculated. The data showed the slope ＇ s error of a more distant point coordinates was much smaller than the median coordinates, and the reason had been analyzed by the theory of the error bar.