【作者】 申建德；

【导师】 谭南林；

【作者基本信息】 北京交通大学 ， 安全技术及工程， 2007， 硕士

【摘要】 随着我国公路建设事业的不断发展,路基施工机械化水平的大幅度提高和先进的装运、摊铺、压实机械的使用,路基填筑速度不断提高,采用传统的压实质量检测方法往往难以满足及时指导施工的要求。为此,研究出一种连续、准确、快速的压实度检测设备,对路基压实质量进行全面实时监控具有重要的现实意义。本文首先分析了土的分类性质、压实原理和振动压路机的工作原理,结合“压路机-土”的二自由度振动系统数学模型,分析“压路机-土”系统,为压实度检测提供理论依据。在现有压实度检测方法成果的基础上,设计出基于DSP的嵌入式系统模块,实现加速度、速度信号的采集、信号处理和传输,采用串口通信模式,实现上、下位机的通信。并开发CAN通讯接口,方便进行嵌入式系统的扩展。在Visual Basic开发环境下设计上位机软件系统,界面友好,实现了数据转储、显示及打印等功能。在检测算法上结合了数字信号处理的相关算法。最后分别利用Matlab和自制信号发生器进行了系统仿真和测试。通过本文的理论分析及试验结果证明此基于DSP的压实度检测系统设计是可行的,检测方法是合理的,基本可以完成检测路基压实程度的任务。更多还原

【Abstract】 With the development of highway building, more requirements are imposed on the compaction degree of soil. During the construction of the roadbed, many advanced machines have been used, which enhance the speed of the road construction. So the demands of the standard of mechanization can’t be satisfied with by the traditional ways of checking soil compaction. So it’s very important to design the equipment which can checks the degree of soil compaction continuously and exactly. There will be great practical significance in monitoring the quality of soil compaction.This article analyses the sorts of soil and the theory of compaction firstly, considering the theory of vibratory roller. By analyzing the roller-soil system, the mathematical model with the two-freedom degree system has been established. The relation between the degree of soil compaction and vibratory acceleration is the foundation of measure methods.Secondly, the system on the basis of DSP embedded standard modular has been designed. Also CAN bus can be extended to realize the collection, transfer and disposal of vibratory signals and velocity signals. The software of the system is developed on the circumstances of Visual Basic 6.0, so the software system is user-friendly. The functions of data storage, display and print are realized.The scheme has been proved feasible by the testing and experiments. The system also has been tested in the laboratory. It can achieve basically the task of checking the compaction degree of the soil.更多还原