钢梁微弱应变信号检测系统设计与实现

【作者】 刘伟；

【导师】 郭建东； 臧朝伟；

【作者基本信息】 电子科技大学 ， 软件工程， 2011， 硕士

【摘要】 为实现钢梁微弱应变信号检测的自动化,本课题开发了钢梁微弱应变检测系统,在保证检测精度的前提下实现微弱应变信号检测的一体化。钢梁微弱应变信号检测系统由软件系统和信号调理电路两部分构成,通过信号调理电路在现场采集数据,利用软件系统进行数据计算和功能分析。本文主要阐述钢梁微弱应变信号检测系统软件与信号调理电路设计与实现。钢梁微弱应变信号检测系统的软件设计与实现部分主要阐述了软件开发中的任务说明、系统模型的建立、系统分析以及功能实现等方面。本文介绍了软件系统的界面设计、数据结构设计、数据处理设计和输入输出设计;重点分析了软件系统的功能,划分并实现了功能模块。钢梁微弱应变信号检测系统可实现电阻测定仪操作练习实验、纯弯梁正应力测定实验、空心圆轴主应力测定实验及拉伸时金属弹性模量测定实验的用户实验登录与注册、数据的检测及采集、数据的计算、数据图形显示与打印、实验数据的查询以及实验报告的打印等功能。在微弱应变信号检测电路设计部分,首先研究了微弱信号检测原理与方法,并将微弱信号检测方法与传统信号检测方法进行比较,根据被检测信号的特征确立应变信号检测的具体方案,进而设计了微弱应变信号的检测电路。更多还原

【Abstract】 In order to realize the automation of the weak strain signal detection, developes the the steel beam weak strain signal detection system, and on the premise of the accuracy the integration of the detection comes true. The system includes two basic parts, which are the software system and the hardware system. The hardware is a signal processing circuit, which is used for the acquisition of the signal from the experiments. The software system mainly computes and analyses the data, and the combination of the two parts satisfies the experiments. The article mainly illustrates the design of the weak signal processing circuit and the system software.The software part mainly illustrates the following topics: the task specification, the model of the system, the analysis of the design and the function realization, etc. the concrete work introduces the interface design, database design, data-processing design and I/O design, etc. The system enables to implement the four material mechanics experiments’manipulation, which are the user’s information register, strain data checking and acquiring, data computing, displaying and printing the figure or the graph, experimental data query and the experimental report’s printing, etc.In the part of the weak signal processing circuit, firstly reseaches the theories and methods of weak signal detection and carries on the comparation between the traditional method and the weak signal detection method. Secondly makes the plan of the weak signal detection according to the characterics of the weak steel beam strain signal. Finally designs each part of the detection circuit.更多还原