【作者】 穆洪伟；

【导师】 赖康生；

【作者基本信息】 大连理工大学 ， 光学工程， 2009， 硕士

【摘要】 钢板平直度在线检测技术研究在工业生产中是一个有实际应用价值的问题,而利用激光光源和CCD测量具有无接触、准确度高、便于计算机处理、易于自动化控制等一系列优点。因此本课题研究的钢板激光平直度仪系统具有很大的现实意义和良好的应用价值。论文从平直度检测系统设计的基本原理出发,在现有的检测系统的基础上进行了改进,设计了光学成像、光源控制、信号采集与处理以及相关的硬件接口构成的钢板激光平直度仪系统的总体方案;重点设计并制作了光源部分的驱动电路和控制程序,具有软件可调和实时数据监测等特点。利用数字信号处理器(DSP),半导体激光器,D/A、A/D转换器,恒流源电路和恒温控制电路为检测系统提供了一个比较理想的线型激光光源。恒流源电路具有防过冲,浪涌,和反向击穿等保护功能。恒温控制电路由半导体电热制冷器(TEC),热敏电阻,和PID控制电路组成。最后设计了实验室可行的测试方法对所设计系统进行了验证。通过在实验室进行的模拟实验,对测量结果及误差产生的原因进行了分析,并采用了必要的校准和补偿。结果表明,本文设计的光源部分具有较高的质量,半导体激光器具有可调节且可以实时监测的工作电流和工作温度的特点。激光器电流的控制精度为±1mA,温度控制精度为±1℃,达到了设计的要求。更多还原

【Abstract】 Online detection of the steel plate’s flatness is applied widespread and valuable in the manufacturing production.Measurement using CCD and linear laser has the virtues of non-contact,high accuracy,convenient for computer processing and easy to control.For this reason,research on the laser flatness gauge of the steel plate has high practical application value and good prospects.The paper designed the overall protocol of steel plate flatness on-line detection system, based on the basic principle of measurement system design,and the amelioration of existing measurement system.Complete the whole design of flatness gauge system that is composed of optical imaging,light source control,data acquisition and processing and the related hardware interface.Focus on the design and produced of the drive circuit and control procedures of the light source that is adjustable with software and features a real-time data monitoring.The design provides the detection system an ideal linear laser source by using of digital signal processor(DSP),semiconductor lasers,D/A,A/D converters,constant current source circuit and temperature control circuit.Constant current source circuit features a protection of overshoot,surge and reverse breakdown.Constant temperature control circuit is composed of thermal electric cooler(TEC),thermistor and the PID control circuit.At last,design a feasible test method in the laboratory for the verification of the system and analyze the reason that caused the error of measurement results.Also gives a necessary calibration and compensation.The results show that the design of the light source system has a higher quality.The lasers can be adjustable and real-time monitoring of the operating current and operating temperature.The accuracy of laser current is±1mA.The accuracy of temperature control is±1℃that meet the requirements of the design.更多还原