基于PSD的角度测量系统设计
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基于PSD的角度测量系统设计(论文13000字)
摘要：基于PSD位置敏感探测器利用激光三角法设计了一种新的角度测量系统。系统设计采用低功耗MSP430F169为主控芯片，通过步进电机导轨系统带动测距模块移动不同距离，分别由PSD位置传感器测量被测面对应的距离，得出在二维坐标系中被测面上若干点的坐标，利用最小二乘法拟合计算出直线方程，利用所建立的数学计算模型求出物体表面夹角大小。该系统实现了角度的高精度、自动化测量，具有重要的现实意义。
关键词：角度测量；PSD；激光三角法；单片机；最小二乘拟合
Design of Angle Measurement System Based on PSD
Abstract：Based on the PSD position sensitive detector, a new angle measuring system is designed by using the laser triangulation method. The system design uses the low power consumption MSP430F169 as the main control chip, through the stepping motor rail system to drive the distance measuring module movement different distance, respectively, by the PSD position sensor measure the measured surface corresponding distance, obtains in the two-dimensional coordinate system is measured The coordinates of several points on the surface, using the least squares fitting to calculate the linear equation, using the established mathematical model to calculate the object angle. The system achieves the angle of high precision, automated measurement, has important practical significance.
Key words：angle measurement；laser triangulation；single chip microcomputer；least squares fitting
目 录
1绪论 1
1.1研究背景及意义 1
1.2国内外研究现状 1
2光学测量方法论证 2
2.1激光三角法直射测量原理 2
2.2激光三角法斜射测量原理 3
3角度测量方法及计算模型 4
4系统框图 7
5硬件电路设计 8
5.1单片机模块 8
5.2激光测距硬件模块 9
5.2.1PSD基本原理、特点 9
5.2.2非线性补偿电路[24] 12
5.3 A/D转换 13
5.4步进电机 15
5.5 LCD12864显示 15
5.6矩阵键盘 16
6软件设计 17
7精度分析 17
7.1 PSD激光测距精度 17
7.2步进电机定位精度 18
7.3 MATLAB测量精度分析 18
结论 19
参考文献 19
致谢 21