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从2001年10月起,欧洲所有新出厂的客车与卡车必须达到欧Ⅲ排放法规的要求,才能注册运行.然而,满足欧Ⅲ要求的柴油机将导致车辆传动系统自重增加.因此,车辆制造商不得不从其它底盘部件上寻找降低自重的措施.减轻车桥系统的自重也相应变得更加重要. 相似文献
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准确实时地监测车辆行驶过程中轮胎状态对行车安全至关重要。目前的胎压监测系统大多价格较高,研发较困难,且对于某些特定车辆的需要,如沙地方程式赛车等需频繁换胎的车辆不具有通用性,传感器匹配程序繁琐,使用极为不便。因此设计了基于STM32单片机的车辆胎压监测系统,能够准确监测轮胎状态信息,具有很好的可靠性,且能够快速完成传感器与轮胎的匹配,可以更好地满足越野车、沙地方程式等车辆频繁换胎的需求,有很强的通用性。 相似文献
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设计一种电流信号注入方式的电动汽车新型绝缘检测装置,通过在高压系统和车辆底盘之间注入一个电流信号,在高压系统、车辆底盘、漏电电阻、采样电阻和电流源之间形成一个测量回路,检测测量回路中取样电阻上产生的电压信号,并进行运算得到绝缘电阻阻值。实际测试表明,系统工作可靠,测量精度高,可有效在线实时监测车辆的绝缘性能,保障行车安全。 相似文献
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别克荣御(Royaum)轿车装备了轮胎气压监测系统(TPMS),当车辆行驶时,系统不断监测4个轮胎内的空气压力,安装在每个轮胎气门杆上的压力传感器周期性地测量轮胎的实际压力,压力信息通过射频(RF)通信传送至安装在车辆后窗台板下的轮胎气压监测系统模块,轮胎气压监测系统模块解译收到的射频信号,并将数据格式化,然 相似文献
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运输行业的业内人士普遍认为,通过降低车辆自重可以有效提高Class 8重卡的燃油经济性。美国铝业协会对此进行了系统的研究,结果表明,用高强度、低重量的铝来替代传统材料可以有效降低3 300 1bs的车辆自重。通过减轻自重,运输企业在每次货运过程中都可以多运送6.5%的货物。如果用吨公里的概念来衡量,可以让运输企业用更少的车次运送更多的货物,提高6.5%的燃油效率和降低6.5%的废气排放。 相似文献
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分布式光纤测振系统具有反应灵敏、监测距离长、测量空间连续、现场无需供电等优势,非常适用于狭长且封闭的隧道环境。文中利用分布式光纤测振技术,对公路隧道沿线在各时段的车流量数据进行采集和统计,同时,对隧道内每台车辆的行驶速度分别进行实时监测。以作为现有交通检测技术的有效补充,为公路隧道的运营管理提供可靠的参考依据。 相似文献
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H. -S. Yoon K. -T. Lee S. -H. Ahn 《International Journal of Automotive Technology》2013,14(4):667-674
A vehicle rollover is a critical accident that could have many causes. This paper describes a novel vision-based system for measuring vehicle roof deformation due to a rollover accident. A vision-based measurement system offers an overall view of structural deformation simply at low cost. Our measurement system was constructed using a Kinect camera from Microsoft, a battery, and a remote-controlled recording computer. Color images and distance maps can be obtained using two sensors embedded in the Kinect along with customized software, and the distance from the camera lens to a specific object can be calculated with a simple equation. To test our proposed approach, actual vehicle rollover experiments were conducted and the resulting roof deformations were compared to those indicated by our system. Moreover, cross-sectional image of Apillar was analyzed to calculate bending moment of inertia. From the research results, it was able to show that deformation errors were within 13 mm, and roof deformation was correlated with vehicle type, or vehicle curb weight. 相似文献
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随着智能网联汽车的迅速发展,汽车对外通信性能的重要性显著提高,但汽车体积大、重量沉,无法直接借鉴传统通信行业的天线系统测试方法。本文以智能网联汽车的天线系统为研究对象,研究出一种改进的近远场变换算法,并基于该方法设计出一种合理的验证方案,从而降低因汽车测试位置偏移对试验结果的影响。研究表明,当以整车作为被测件时,车载天线在测试系统中心和整车几何中心在测试系统中心的情况下,近场测试数据存在明显的较大差异;然而通过正确的NF-FF变换处理,两者远场辐射方向图都是一致的。说明了在球面近场系统测量加近远场变换的处理下,可以得到整车远场辐射信息。该结论对推动整车无线性能测试提供了实验和验证基础。 相似文献
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Yu Ren Jianzheng Chen 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2019,57(2):269-285
With the aim of improving the continuous measurement of wheel–rail contact force by instrumented wheelset, instead of solving the non-linear equations, we proposed a new method based on state space theory. With this new method, the wheel–rail contact force can be calculated by the recurrence relation and the signals from strain gauge bridges on wheel web. The implementation of continuous instrumented wheelset is quite general and simplified, due to the specific bridging scheme is not necessary. It means that continuous measurement of the contact force could be realised with a simple bridging scheme, even as simple as discrete instrumented scheme. In this work, we first demonstrated and discussed the effectiveness and accuracy of this new method by estimation results with the numerical simulations, and we also applied this new method to two field tests, including one was conducted in a loop test line using a high-speed train and the other one was conducted in an urban line with a light rail vehicle. In a word, this new method is proved to be an effective way to monitor the wheel–rail contact force of rail vehicle track system. 相似文献
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通过限定车辆轴载来控制车辆超限超载,采用动态采集"轮"或"轴"载荷来监测车辆轴载的质量、总重.从安装形式看,石英式称重条、弯曲式称重板是一种"路面直埋"称重系统产品,整车式或轴组式称重系统是一种"基坑吊装"称重系统,均需破坏路基(包含大面积路面翻新硬化处理)为代价,存在安全性差、隐患较多、施工难度大、周期长、保养困难等... 相似文献
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提出了一种基于无线传感器网络(WSN)的车流量监控系统。系统采用无线数据采集的方法和地磁传感器进行车辆检测的方法,通过无线传感器网络的多跳传输机制传输车辆感应数据,并通过地磁传感器采集车辆感应数据。系统通过后台统一管理,用户可实时获取道路车流量信息,相比传统的基于有线数据采集和地磁感应线圈检测器的监控系统,基于WSN的车流量监控系统在施工与维护上具有很大优势,可实现交通车流量状况的实时监控。 相似文献
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M. H. Lee H. M. Lee K. S. Lee S. K. Ha J. I. Bae J. H. Park H. G. Park H. J. Choi H. H. Chun 《International Journal of Automotive Technology》2011,12(5):733-744
In this paper, a hardware-in-the-loop simulation (HILS) system was developed before the development of an electric power steering
(EPS) system in a vehicle. This study was focused on the establishment of the HILS system. Driving conditions are simulated
with the HILS system. The actual steering input parameters are confirmed on the monitor while driving the HILS system. The
steering forces observed in the simulation with the developed HILS system are similar to those in real vehicle tests. The
developed HILS system can be applied in the development of various types of EPS systems. 相似文献
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通过对目前车辆安全防盗方面的分析,介绍了车辆在安全防盗与车门解锁之间的关系.利用51单片机构建了某汽车防盗系统.该系统由指纹模块、AT89C51、蜂鸣器驱动模块、继电器驱动模块、液晶显示模块及单片机最小系统电路构成,可以对汽车进行实时监控.当发生盗窃的情况时,指纹识别模块会进行识别并会发出警报. 相似文献