激光平面与标定板相交会形成一条直线。 激光平面在空间上位置是固定的，标定板每次移动到一个新位置时，就会产生一条新的交线（直线）。-The intersection of the laser plane calibration board will form a straight line. Laser plane position is fixed in space, the calibration plate each time it moves to a new location, it will produce a new line of intersection (straight line).