外差式激光测振仪关键参数校准研究

发布时间：2018-10-10 18:58

【摘要】：激光测振仪广泛应用于国防、精密机械制造、汽车等领域,对其校准技术和方法的研究尤为重要。本课题的研究依附于国家重大科学仪器开发专项项目子课题“跨尺度三维光电振动测量仪计量及可靠性评价研究”,主要负责激光测振仪关键电路性能的校准研究,包括校准方法的研究、标准装置的研制及校准软件的开发,最终形成一套外差式激光测振仪关键参数校准系统。考虑到本课题的应用范围,作者主要研究振动频率为0.2Hz-300kHz范围内激光测振仪信号采集、处理电路的关键参数的校准。主要进行了以下几方面的研究工作:第一章阐述了课题的研究背景与意义,对激光测振仪的国内外校准研究现状进行了综述,并对论文的主要内容进行了概述。第二章确定了激光测振仪量程、线性度、灵敏度、相移、上升时间、总谐波失真度六个关键校准参数,对每一参数的定义及校准方法进行了研究,制定了用电信号对激光测振仪各关键参数进行校准的方案。第三章对激光测振仪校准系统硬件进行了选型与设计,分别介绍了信号发生模块、数据采集模块以及数据处理与控制模块的设计,利用NI PXI平台完成了整个校准装置的搭建。第四章对激光测振仪校准系统软件进行了设计,介绍了基于LabVIEW的用户登录模块和激光测振仪关键参数校准模块的软件编写,借助虚拟仪器技术,实现了上位机与板卡设备之间的通讯及数据的采集、处理,实现了对激光测振仪各关键参数的自动校准。第五章对本文研制的校准系统进行性能验证,并利用该校准系统对舜宇公司的激光测振仪关键参数进行了计量校准,验证了校准系统的稳定性、准确性。第六章对全文进行总结,指出了不足之处,对下一步工作提出了展望。
[Abstract]:Laser vibration measuring instrument is widely used in the fields of national defense, precision mechanical manufacture, automobile and so on, so it is very important to study its calibration technology and method. The research of this subject is attached to the subproject of national important scientific instrument development project, "Measurement and reliability evaluation of three dimensional photoelectric vibration measuring instrument", which is mainly responsible for the calibration research of the key circuit performance of laser vibration measuring instrument. Including the research of calibration method, the development of standard device and the development of calibration software, a set of calibration system for key parameters of heterodyne laser vibration measuring instrument is formed. Considering the application scope of this subject, the author mainly studies the calibration of the key parameters of the processing circuit and the signal acquisition of the laser vibration measuring instrument in the range of 0.2Hz-300kHz. The main work is as follows: the first chapter describes the research background and significance of the subject, summarizes the domestic and foreign calibration research status of laser vibration measuring instrument, and summarizes the main contents of the paper. In the second chapter, six key calibration parameters are determined, such as the measurement range, linearity, sensitivity, phase shift, rise time and total harmonic distortion. The definition and calibration method of each parameter are studied. The scheme of calibrating the key parameters of laser vibration measuring instrument with electric signal is established. In the third chapter, the hardware of the calibration system of laser vibration measuring instrument is selected and designed. The design of signal generation module, data acquisition module and data processing and control module are introduced, and the whole calibration device is built using NI PXI platform. In chapter 4, the calibration system software of laser vibration measuring instrument is designed, and the software programming of user login module based on LabVIEW and the calibration module of key parameters of laser vibration measuring instrument is introduced, with the help of virtual instrument technology. The communication between the upper computer and the board card equipment and the data acquisition and processing are realized, and the automatic calibration of the key parameters of the laser vibration measuring instrument is realized. In chapter 5, the performance of the calibration system developed in this paper is verified, and the key parameters of the laser vibration measuring instrument of Shunyu Company are measured and calibrated by the calibration system, which verifies the stability and accuracy of the calibration system. The sixth chapter summarizes the full text, points out the shortcomings, and puts forward the prospects for the next work.
【学位授予单位】：中国计量大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH825

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