IOE OpenIR  > 光电技术研究所博硕士论文
Thesis Advisor马文礼
Degree Grantor中国科学院光电技术研究所
Place of Conferral中国科学院光电技术研究所
Keyword激光扫描 激光测径仪 可编程 边缘信号 提取 微分法
Other AbstractA measuring method of laser scanning is an ideal method of online and no-contact measure. It utilizes laser's characters of little radiation of angle and high intensity. This measuring method has the advantage of high measuring precision、 large measuring range and good adaptability. The laser diameter finder can measure many kinds of geometry sizes by using the corresponding soft. This paper expatiates on the measuring principle and expressions, and deduces the expressions of error transferring. In additional, this paper establishes the model of laser scanning, concludes that the differential method is a best way of detecting the edge signal.On the other hand, this paper implements the differential method using circuit, and solves some problems that may be encountered in the progress of implementing. FPGA/CPLD devices are used in all the digital circuits of this laser diameter finder. FPGA/CPLD devices grow speedily recently years and have good application prospects in photo electricity measuring instrument. So, FPGA and CPLD's structures and their application characteristics are expatiated in this paper. In additional, this paper discusses the design method of modern digital system. The data collection system of this instrument makes use of RS232 and EPP interface to transfer data, which are widely used in measuring instrument. RS232 and EPP interface each has different characteristics. This paper expatiates the protocols of RS232 and EPP, and gives the way to implement them using hardware. Lastly, the author makes a program using VC++ for the laser diameter finder. Based on the measure result, this paper demarcates the measure precision of this instrument.
Document Type学位论文
Recommended Citation
GB/T 7714
黄运新. 激光扫描直径测量技术研究[D]. 中国科学院光电技术研究所. 中国科学院光电技术研究所,2001.
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