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投稿时间：2005-10-20
投稿时间：2005-10-20
中文摘要: 一种采用激光拍频干涉原理，测量大尺寸机械零件或构件的高精度测距仪系统已研制成功。它的特点是用双纵模He-Ne激光为光源，无需任何参考频率标准，稳频精度在室外有风的环境下优于1×10-7。两个纵模的激光出自同一谐振腔，因而自然同轴，其拍频约为790 MHz，拍波长约380 mm。此系统以节点为对准标志，最临近节点到被测点的间距用组合于同一光路中的分系统干涉仪测量，干涉仪分辨率为0.08。无需长导轨或任何重型机械构件，测量范围0~20 m。采用自适应滤波和小波分析，消除噪声、锐化波形，使测量的不确定度30 μm/10 m。
Abstract:A precision ranger system for measuring the large machining pieces or structures is described. The system uses the principle of beat-wave measurement. The light source of this system is a frequency stabilized laser with a frequency stability of 1×10-7 (open air), which does not depend on any reference frequency. It operates in two longitudinal modes; i.e., the laser emits two beams, which generate in the common resonator of the laser. The beat frequency is about 790 MHz and the wavelength is about 380 mm. The two beams are naturally coaxial. The node of the beat-wave is used as sampling flag and the distance between the node and the close point is measured with double frequency interferometer, which is combined in the same optical system and its resolution is 0.08. As a precise ranger, it does not need a long guide or any heavy machinery. The system described here has the measuring range of 0~20 meters and the measuring uncertainty of 30 μm / 10 m.
文章编号：20060526 中图分类号： 文献标志码：
基金项目:国家自然科学基金资助项目( 50275101 )
| Author Name | Affiliation |
| Inst. of Applied Laser, Sichuan Univ., Chengdu 610065, China | |
| Inst. of Applied Laser, Sichuan Univ., Chengdu 610065, China | |
| Inst. of Applied Laser, Sichuan Univ., Chengdu 610065, China |
作者简介:
引用文本：
赵武,张涛,周肇飞.测量大型机件的精密测距仪[J].工程科学与技术,2006,38(5):152-155.
.Precision Ranger for Measuring Large Mechanical Components[J].Advanced Engineering Sciences,2006,38(5):152-155.
引用文本：
赵武,张涛,周肇飞.测量大型机件的精密测距仪[J].工程科学与技术,2006,38(5):152-155.
.Precision Ranger for Measuring Large Mechanical Components[J].Advanced Engineering Sciences,2006,38(5):152-155.