| 基于球心拟合的多边激光跟踪系统自标定方法 |
| |
| 引用本文： | 何俊,张福民,张画迪,曲兴华.基于球心拟合的多边激光跟踪系统自标定方法[J].红外与激光工程,2020,49(8):20190438-1-20190438-7. |
| |
| 作者姓名： | 何俊 张福民 张画迪 曲兴华 |
| |
| 作者单位： | 天津大学 精密测试技术及仪器国家重点实验室，天津 300072 |
| |
| 基金项目： | 国家自然科学基金;国家重点研发计划 |
| |
| 摘 要： | 随着大尺寸工件和设备的制造加工以及装配的精度要求提高，对工件加工装配过程进行测量的测量系统精度要求也有所提高。多边法激光跟踪三维坐标测量系统只利用距离测量数据解算空间点坐标，能够避免激光跟踪仪角度测量带来的误差。文中提出了一种通过在跟踪仪测头挂载夹具进行球心拟合来获取跟踪仪测量原点的方式进行系统自标定，并辅以移站的方式，可使用两台激光跟踪仪构建四站多边法激光跟踪三维坐标测量系统。另外，文中还尝试了三站系统的构建。实验证明，四站系统将对标称长度1000.943 mm位于约20 m处的标准尺长度测量误差由最大110 μm减小至28 μm，三站系统将对标称长度969.045 mm位于约7.5 m处的标准尺长度的测量误差由最大67 μm减小至21 μm，相较于单台跟踪仪提高了精度，相较于传统多边系统降低了测站数量和成本，能够在工业现场实现高精度三维坐标测量。
|
| 关 键 词： | 多边法 激光跟踪仪 球心拟合自标定 坐标测量 |
| 收稿时间： | 2019-11-20 |
Multilateral laser tracking system self-calibration method based on spherical center fitting |
| |
| Affiliation: | State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China |
| |
| Abstract: | With the increase of precision requirements for manufacturing, processing and assembly of large scale workpieces and equipment, high precision measurement system is needed to measure the machining and assembling process of workpiece. Multilateral laser tracking 3D coordinate measuring system measures the distance data to solve the space point coordinates which can avoid the error caused by the angle measurement of laser tracker. Based on non-target self-calibration model, a spherical center fitting-self-calibration method for multilateral laser tracking 3D coordinate measuring system was constructed in this paper. By mounting an fixture to the laser tracker and moving station, a four station laser tracking 3D coordinate measuring system can be constructed. In addition, a three station system was also constructed. The experimental results show that the error of distance between the two ends of the scale bar with nominal length 1000.943 mm measured by three-station system is reduced from 110 μm to 28 μm at the distance of 20 m, and the distance error between the two ends of the scale bar with nominal length of 969.045 mm measured by four-station system is reduced from 67 μm to 21 μm at the distance of 7.5 m. Compared with single-tracker measurement, the precision is improved, the number of station and the cost for the system are reduced compared with traditional multilateral measurement system. The system can realize high precision for 3D coordinate measurement in industrial field. |
| |
| Keywords: | |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《红外与激光工程》浏览原始摘要信息 |
|
点击此处可从《红外与激光工程》下载全文 |
|
