摘要
针对航空制造现场的长跨度大直径孔系装配难题,提出一种基于激光准直和光电检测技术的同轴度误差测量方法。以单模光纤激光器发出的准直光束作为测量基准,研制的多功能测头在被测孔内稳定支撑,测头前端的PSD传感器测量准直激光光斑坐标以确定测头相对位置。然后,激光测距传感器在电机驱动下旋转并测量孔轮廓点的距离,结合电机内部角度编码器的数据计算出孔在当前截面上的中心坐标。移动测头依次测量多个截面,最后根据所有截面的中心评定出被测孔系的同轴度。完成孔系同轴度测量实验,实验结果表明该系统测量重复性为0.0042 mm,通过蒙特卡洛法分析得到的系统测量不确定度优于0.0045 mm。
In order to solve the problem of long-span and large-diameter hole assembly in aviation manufacturing field,a coaxiality error measurement method based on laser collimation and photoelectric detection technology is proposed.Taking the collimating beam emitted by a single-mode fiber laser as the measurement benchmark,the developed multi-function probe is stably supported in the measured hole,and the PSD sensor at the front of the probe measures the collimating laser spot coordinates to determine the relative position of the probe.Then,the laser ranging sensor rotates under the drive of the motor and measures the distance of the hole profile point,combined with the data of the internal angle encoder of the motor to calculate the center coordinate of the hole on the current section.The moving probe measures several sections in turn,and finally evaluates the coaxiality of the measured hole system according to the center of all sections.The experiment of measuring the coaxiality of the hole system is completed,and the experimental results show that the repeatability of the system is 0.0042 mm,and the measurement uncertainty obtained by Monte Carlo method is better than that of 0.0045 mm.
出处
《科技创新与应用》
2023年第26期160-163,167,共5页
Technology Innovation and Application
关键词
长跨度大直径孔系
同轴度
激光准直
激光测距
光电位置探测器
long span and large diameter hole system
coaxiality
laser collimation
laser ranging
photoelectric position detector
