三维激光扫描定位光机系统优化设计

Optimization design of the 3D laser scanning and locating opto-mechanical system

提出了一种三维激光扫描定位系统优化设计方案,主要对激光发射/接收光机系统进行了消热化设计,并构建了合理化选择弹性隔圈设计参数的数学模型;同时对U形运动框架进行了尺寸参数优化设计。分析结果表明,该光机结构在-10℃、50℃的两个极限温度下,镜组的最大轴向变形量均小于0.1 mm的装配误差;透镜的最大应力分布值为14.365 MPa,小于材料的屈服强度;优化后的运动框架一阶固有频率提高至2236.2 Hz,能够承受10 g加速度的冲击。测试结果表明,系统的最大测距误差为32.6 mm,小于0.1 mm的误差要求;重复性误差为±27 mm,满足技术指标要求。

An optimization design scheme of 3D laser scanning and locating system was proposed in this paper.Athermalization design was conducted for the laser launching and receiving opto-mechanical system.Moreover,a mathematical model with elastic space ring design parameters was rationally chosen.The dimensional parameter optimization design was implemented for the U sports framework.The findings indicated that this opto-mechanical structure was kept at two limit temperatures(-10℃and 50℃).The maximum axial deformation of the mirror group was less than 0.1 mm of the assembly error.The maximum stress distribution value of the lens was 14.365 MPa,which was less than the yield strength of materials.The first-order inherent frequency of the optimized sports framework was increased to 2236.2 Hz and it could undertake the impact of 10 g accelerated velocity.The test results showed that the maximum range error of the system was 32.6μm,which was less than 0.1 mm of the error requirement.The repeatability error was±27μm,meeting the requirements of technical indexes.