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针对现今叶片轮廓测量时,在保证测量精度的前提下提高测量速度的需求,结合工程经验与线激光扫描快速准确的特点,本文提出一种以多个线激光扫描传感器为主体的叶片轮廓快速测量系统,该系统由3个位置固定的线激光扫描传感器完成叶片轮廓测量.在理论上3个传感器测量坐标系之间的旋转矩阵中的未知参数是确定的,故这3个坐标系之间不存在由相对运动引起的直线度误差与定位误差等,主要存在由于安装产生的垂直度误差与平移误差等人为因素误差,因此本文提出并推导了该测量系统坐标系全局标定数学模型,并给出了标定过程与标定结果,通过实际测量叶片轮廓验证了该系统与测量机的测量对比误差为±0.03 mm,测量周期不超过10 s,满足实际测量要求.
Aiming at the need of improving the measurement speed under the premise of ensuring the measurement accuracy when the current blade profile measurement is carried out, combining with the engineering experience and the rapid and accurate characteristics of the line laser scanning, a rapid measurement of the blade profile with a plurality of line laser scanning sensors as the main body is proposed System, the system consists of three fixed line laser scanning sensor to complete blade profile measurement.In theory, the three sensors measure the unknown parameters in the rotation matrix between the coordinate system is determined, so the three coordinate system is not There exist linearity errors and positioning errors caused by relative motion, mainly due to human factors such as the vertical error and translation error caused by the installation, so this paper presents and deduces the global calibration mathematical model of the measurement system coordinate system, and gives The calibration process and calibration results were verified by the actual measurement of blade profile. The measurement error of the system and the measuring machine was ± 0.03 mm and the measurement period was less than 10 s, which satisfied the actual measurement requirements.