激光技术, 2011, 35 (3): 407, 网络出版: 2011-05-13   

无衍射光电子标靶的直接映射标定方法研究

Study on direct mapping calibration method of an electronic target based on non-diffracting beam
作者单位
华中科技大学 机械科学与工程学院 仪器科学与技术系, 武汉 430074
摘要
为了实现盾构机的自动导向,研制了一种新型无衍射光电子标靶,给出了该电子标靶系统的构成和姿态角测量原理。针对标靶光学系统难以确定精确光学中心的问题,提出一种新型标定方法,直接将全站仪激光入射在标靶中CCD上的光斑中心位置和全站仪的角度值联系起来,建立一一对应的映射关系数据库。工作时,由光斑中心位置可直接插值得到入射光线的空间角度,再结合电子水平仪读数,计算出标靶的实际坡度角、滚动角和水平方位角,并进而计算盾首中心坐标。结果表明,利用该方法对无衍射光电子标靶进行标定能够获得较高的标定精度,从而在标靶进行测量工作时获得较高的测量精度。
Abstract
Based on the principle of the non-diffracting beam, a new electronic target was designed for guidance of a shield machine. The system constitution and the measurement principle of attitude angles of the electronic target were discussed. Since the accurate optic center of optic system in the electronic target was difficult to find, a new calibration method was proposed. The spot center location of the incident laser of the total station in CCD fixed in the electronic target and the angle data of the total station were combined, and a mapping database was set up. During guidance of the shield machine, the actual slope angle, rolling angle and horizontal azimuth angle of the electronic target and the center of the head of shield machine were computed by the space angle of the incident laser interpolated by the actual spot center location and the angles of electronic gradienter. The experiment shows that high calibration precision is achieved by the calibration method, and high measurement precision is gained during measurement of electronic target.

陈慧, 赵斌, 马国鹭. 无衍射光电子标靶的直接映射标定方法研究[J]. 激光技术, 2011, 35(3): 407. CHEN Hui, ZHAO Bin, MA Guo-lu. Study on direct mapping calibration method of an electronic target based on non-diffracting beam[J]. Laser Technology, 2011, 35(3): 407.

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