优秀毕业设计小论文举例1优秀毕业设计小论文举例1.docVIP

注塑机的液压系统设计 学院：机械工程学院 专业：机械设计制造及其自动化 指导教师：阎晓珊 摘 要：近年来，我国高速公路、桥梁建设飞速发展，日新月异。但是由于目前公路交通超载十分严重，不仅导致很多恶性的交通事故，还引起公路“早期损伤”，危害桥梁、涵洞的安全。为了配合交通部门稽查超载、交通部门收集交通数据的需要，国内外研究开发了电阻应变片式、压电式、液压式、光纤式等很多不同种类的称重系统。但是实际的应用表明：目前广泛应用的各种称重传感器一个共同的缺点就是容易损坏、耐久性差。本文首先对国内外称重技术的研究进行了广泛的调查研究并对各种不同原理的称重传感器做了技术经济分析。结果表明基于光纤光栅的称重传感器具有耐久性好、精度高、抗电磁干扰、防舞弊、对环境要求低、生命周期内费用低等优点，是适合实际工程应用的新型称重传感器，并以感知梁为称重传感器进一步设计了动态称重汽车衡。然后对设计制作的感知梁进行了实验标定工作。最后对动态称重系统的算法及软件系统进行了研究，给出了动态称重系统的软件系统框架以及最适合本方案的信号分析算法。 关键词：光纤光栅；汽车衡；动态称重；超载； Abstract：In recent year, the construction of roads and bridges has developed rapidly, but it was damaged badly by the rampantly overweighed heavy truck.For the purpose of vehicle enforcement and traffic data collection, load cell, piezoelectric, hydraulic, optical fiber, and many other kinds of weighbridges and WIM sensors have been developed and took into application both domestic and abroad. But all those WIM sensors have the disadvantage that have a bad durability and are apt to be damaged by the aggressive environment.In this paper, first, we make a great effort on investigating the application of WIM sensors all over the world and compare these sensors with each other. The research showed that the WIM sensor which based on FBG have the advantages of good accuracy, good durability good linearity, good repeatability, immunity to electromagnetism and cheating purpose, easy for maintenance, and could be used in some blast- prevent field. So it is the best one to be applied to WIM systems. Second, after analyze of structure types, materials and the demand of WIM systems, a new kind of WIM sensor and WIM systems based on FBG strain sensor was developed. Third, we calibrate this FBG WIM sensor and compare the results to the theory value and then improve the design again, finally, we have studied the arithmetic and software systems and an arithmetic which suit for this WIM system mostly was proposed. Key words：FBG; Weighbridge; WIM; overweigh 引 言 近年来，公路上行驶的超限运输车辆愈来愈多，据统计，货车超载超限运输肇事占交通事故总数的30%