Abstract：The PSD-based laser collimation measurement system can simultaneously measure the horizontal and vertical straightness within a distance of 40m, through the segmented splicing measurement method can further expand the measurement range, compared with the traditional long guide rail straightness measurement method is mostly applicable to continuous guide rail, laser collimation measurement system is not only applicable to the straightness measurement of the continuous guide rail, but also applicable to the straightness measurement of the detached long guide rail. First of all, in the (-5~+5) mm measurement range, through the laser interferometer were measured by the laser collimation measurement system of the receiving target in the horizontal and vertical direction of the displacement of the demonstration value error are better than ±(1μm+1%H), H for the demonstration value (unit: mm). Then on the 50m long guide rail, the laser interferometer is used to compare the straightness measurement accuracy with that of the laser collimation measurement system in the range of 40m, and the difference in straightness error between the two in the horizontal direction is 0.06mm, and the difference in straightness error in the vertical direction is 0.13mm. Finally, the straightness of the 70m detached long guide rail is measured using the laser collimation measurement system, and the straightness in the horizontal direction is measured to be Finally, using the laser collimation measurement system to measure the straightness of 70m separated long guide rail, the measured horizontal straightness is 0.50mm, vertical straightness is 0.53mm. using this method can quickly locate and adjust the position of the straightness error extreme point, can effectively solve the separation of long guide rail straightness assembly debugging problems.
2024, Vol. 45 
