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  本文關鍵詞：基于LabVIEW的振動壓路機實時檢測系統(tǒng)研究　出處：《西安建筑科技大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： LabVIEW 振動壓路機 壓實度 全球定位系統(tǒng)

【摘要】：壓路機振動壓實作業(yè)是現代公路建設施工過程中一個重要的組成部分,瀝青路面鋪筑質量直接決定了公路的使用壽命和行車安全,而影響公路質量高低的主要因素是路面壓實度的好壞。壓實度是一種表征材料被壓實程度的物理量,因此,準確快捷的壓實度檢測是保證壓實作業(yè)質量的關鍵環(huán)節(jié)。隨著科學技術的迅猛發(fā)展,路面施工機械化水平的大幅度提高和先進的裝運、攤鋪、壓實機械的使用,路面鋪筑速度不斷提高,人們對道路施工機械的要求也越來越高,采用傳統(tǒng)的壓實質量檢測方法往往難以滿足及時指導施工的要求。傳統(tǒng)路面壓實度檢測常采用灌砂法、環(huán)刀法、蠟封法,這些方法都有兩大缺陷,即檢測方式的滯后性和檢測點的局限性。檢測方式是采取路面鋪筑完后再進行抽樣檢測,這樣檢測耗時比較長,不能及時的給出壓實度結果;檢測點只是簡單的隨機數據采樣,這樣有可能造成部分路面的漏檢,不能保證全部路段的施工質量。針對傳統(tǒng)檢測技術的缺點,研究出一種連續(xù)、準確、快速的壓實度檢測設備,對路面壓實質量進行全面實時監(jiān)控具有重要的現實意義。本論文在借鑒國內外有關壓實度檢測方法和研究成果的基礎上,完成了基于Lab VIEW的振動壓路機實時檢測系統(tǒng)的設計。首先,結合二自由度“壓路機—被壓材料”關系模型,分析了振動輪加速度信號與材料剛度之間的數學關系,對國內外研發(fā)壓實度儀常用原理進行了重點研究,通過分析對比,最終選擇相關性較好的幅值法。根據振動壓路機的工作特點,結合瀝青路面鋪筑工藝,選擇振動輪的加速度信號作為檢測壓實度的信號源,對此信號進行幅值分析以求出壓實度,這為壓實檢測提供了理論依據。其次,針對本測試系統(tǒng)的需求,分析討論測試中采用傳感器的測量原理及傳感器的選用和安裝。重點從軟硬件兩個方面研究組建該測試系統(tǒng)。硬件平臺的搭建包括傳感器模塊、信號調理模塊、數據采集模塊三部分,其中采用虛擬儀器測試技術采集數據;軟件采用模塊化的設計方法,在Lab VIEW開發(fā)環(huán)境下設計振動壓路機檢測系統(tǒng),把系統(tǒng)的各個功能細分到每個子功能模塊,包括初始化參數、濾波、小波消噪、數據保存、數據回放,通過對不同模塊的調用來實現測試中信號采集、數據處理、數據分析及結果顯示等功能。在檢測算法上通過最小二乘法線性擬合,得出加速度電壓值與壓實度實測值的對應關系,通過算法程序最終得到壓實度實際測量值。最后,通過仿真信號對所設計的振動壓路機在線檢測系統(tǒng)進行調試和驗證,結果表明,此檢測系統(tǒng)的設計是可行的,應用本系統(tǒng)可以很好的完成數據的采集和分析,可以滿足道路施工中壓實度在線檢測的要求。
[Abstract]:The vibratory compaction of road roller is an important part in the construction process of modern highway construction. The quality of asphalt pavement pavement directly determines the service life and driving safety of highway. The main factor affecting highway quality is the quality of road surface compaction. Compaction is a physical quantity that indicates the degree of compaction of materials. Accurate and fast compaction testing is the key to ensure the quality of compaction. With the rapid development of science and technology, the level of mechanization of road construction has been greatly improved and advanced loading, spreading and compaction machinery have been used. With the increasing speed of pavement construction, the requirement of road construction machinery is becoming higher and higher. Traditional compaction quality testing methods are often difficult to meet the requirements of timely guidance of construction. Traditional road compaction testing methods often use sand filling method, ring knife method, wax sealing method, these methods have two major defects. That is, the hysteresis of the detection method and the limitation of the detection point. The detection method is to take the road pavement after the completion of sampling detection, so the detection time is relatively long, can not give the results of compaction in time; The detection point is only a simple random data sampling, which may cause part of the pavement to miss detection, can not guarantee the construction quality of all sections of the road. In view of the shortcomings of the traditional detection technology, a continuous and accurate research. It is of great practical significance to monitor the pavement compaction quality in real time with the rapid compaction testing equipment. This paper draws lessons from the domestic and foreign compactness testing methods and research results. The design of the real-time detection system of vibratory roller based on Lab VIEW is completed. Firstly, the relationship model of "roller press and pressed material" is combined with two degrees of freedom. The mathematical relationship between the acceleration signal of vibration wheel and the stiffness of material is analyzed, and the common principles of the compactness instrument developed at home and abroad are studied emphatically, and compared with each other. Finally, the amplitude method with good correlation is selected. According to the working characteristics of the vibratory roller and the asphalt pavement paving technology, the acceleration signal of the vibration wheel is selected as the signal source to detect the compaction degree. The amplitude of the signal is analyzed to find out the compaction degree, which provides a theoretical basis for the compaction detection. Secondly, according to the requirements of the test system. The measurement principle of sensors and the selection and installation of sensors are analyzed and discussed in this paper. The hardware platform consists of sensor module and signal conditioning module. There are three parts of data acquisition module, in which virtual instrument testing technology is used to collect data. The software adopts the modular design method, designs the vibration roller detection system under the Lab VIEW development environment, subdivides each function of the system into each sub-function module, including initialization parameter, filter. Wavelet denoising, data saving, data playback, through the call to different modules to achieve signal acquisition, data processing. In the detection algorithm, the linear fitting of the acceleration voltage value and the compactness measurement value is obtained by the least square method, and the corresponding relationship between the acceleration voltage value and the measured value of compaction degree is obtained. Finally, the actual measurement value of compaction degree is obtained by the algorithm program. Finally, the on-line testing system of the vibratory roller is debugged and verified by the simulation signal. The results show that the design of the detection system is feasible. The application of this system can well complete the data collection and analysis, can meet the road construction in the requirements of online compaction detection.
【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U416.2

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本文編號：1406460