平直度测量中,常以标准直尺为基准对被测直尺进行比较测量。为了使测量系统的原理误差最小,习惯上都是按照一个原则——即布莱恩建议进行布局。其内容如下: “平直度测量系统(即标准尺)的工作点应当位于垂直于滑板移动方向的、并通过被测的平直度(即被测尺)作用点的方向线上。如果这不可能,那么或者必须使传送平直度的导 Flatness measurement, often with a standard ruler as a benchmark to be measured ruler measurements. In order to minimize the error of the principle of the measuring system, it is customary to follow a principle - that is, Bryant recommends layout. Its contents are as follows: "The operating point of the flatness measurement system (ie, standard ruler) shall be located on the direction line perpendicular to the direction of movement of the slider and passing through the point of application of the measured flatness Impossible, then or must pass flatness guide