汽车传感器应用综述

现代汽车安装了多种传感器，它们可以按不同性能进行分类；在研发和使用汽车传感器时，应在注重其各种选择原则的基础上，重点把握各项性能指标。     

核辐射智能传感器设计

将电离室和DSP、信号调理电路、温度传感器等芯片封装为一体,组成智能化传感器,实现实时监测、信息存储、自动调零、数据处理、自检、标定等功能。该传感器具有测量精度高,环境适应能力强,可靠性高等特点。     

Cooperative GNSS positioning aided by road-features measurements

Cooperation between road users through V2X communication is a way to improve GNSS localization accuracy. When vehicles localization systems involve standalone GNSS receivers, the resulting accuracy can be affected by satellite-specific errors of several meters. This paper studies how road-features like lane marking detected by on-board cameras can be exploited to reduce absolute position errors of cooperative vehicles sharing information in real-time in a network. The algorithms considered in this work are based on a error bounded set membership strategy. In every vehicle, a set membership algorithm computes the absolute position and an estimation of the satellite-specific errors by using raw GNSS pseudoranges, lane boundary measurements and a 2D georeferenced road map which provides absolute geometric constraints. As lane-boundary measurements provide essentially cross-track corrections in the position estimation process, cooperation enables the vehicles to improve their own estimates thanks to the different orientation of the roads. Set-membership methods are very efficient to solve this problem since they do not involve any independence hypothesis of the errors and so, the same information can be used several times in the computation. Such class of algorithm provides a novel approach to improve position accuracy for connected vehicles guaranteeing the integrity of the computed solution which is pivoting for automated automotive systems requiring guaranteed safety-critical solutions. Results from simulations and real experiments show that sharing position corrections reduces significantly satellite-specific GNSS errors effects in both cross-track and along-track components. Moreover, it is shown that lane-boundary measurements help reducing estimation errors for all the networked vehicles even those which are not equipped with an embedded perception system.     

轻型车用柴油机直喷燃烧系统的研究

本文论述了轻型车用柴油机直燃燃烧系统及工作过程组织的特点，分析了小缸径高速柴油机直喷时遇到的问题，介绍了采用节流轴针式喷油器及双喷油器的小缸径高速柴油机直喷系统的有关研究结果。实验证明，通过工作过程的有效组织。采用这种燃烧系统的柴油机性能可达到与采用传统直喷燃烧系统的柴油机性能基本相当的水平。     

Inverse Heat Conduction and Data-Type Issues for Advanced Diagnostic Analysis

IlitroductlonNormallytemperaturemeasurementsareusedinaninverseheatconductionanalysis.lnarecelltinverseheatconductioninvestigation[ll,twodatatypes(temperatureandheating/coolingrate)weecomparedforthepurposeofinvestigatingtheireffectonpredictingthesurfaceheatfltixattheprojectedsurface.Itwasillustrated,vianumericalexample,thatthechoiceofinputdatainnuencesbOththeaccurasyandstabilityattheprojectedsurface.Thatis,thepredictionnotonlydePendsonthetemperaturedatabutimplicitlyitsillterpretedheating/cooli…     

电动汽车永磁同步轮毂电机无位置传感器控制方法综述

在石油开采过度和环境污染等问题愈来愈严重的情况下,世界各国政府和汽车生产商加大了对电动汽车的研发力度。目前,轮毂电机驱动电动汽车作为一种比较新的电动汽车形式,正受到世界各国汽车生产商的青睐。为了提高电动汽车整车控制性能,往往是采用普通机械式传感器的方法来获取轮毂电机的转子位置信息,来对轮毂电机进行矢量控制,这种方法不利于汽车的轻量化且容易发生故障。为了实现轮毂电机的矢量控制,对永磁轮毂电机全速度范围无位置传感器控制方法进行了重点分析,并对电动汽车永磁同步轮毂电机无位置传感器控制技术发展进行了展望,认为信号注入法的改进、参数敏感问题及切换算法的改进是未来的研究方向和发展趋势。     

降低沥青混合料加热成本的途径

分析了沥青混合料的生产过程,提出了集料、燃料、设备和生产过程等对加热成本的影响,为沥青混合料生产中节约能源提供了参考。     

钢-混凝土组合桥面板模型混凝土顶裂缝损伤全过程检测

利用光纤Bragg光栅(FBG)传感器与电阻应变片同时监测,完成了钢-混凝土组合桥面板模型混凝土顶裂缝损伤检测。模型试验经历了静载、疲劳(300万次)和破坏3个阶段。测试结果表明无纵向承载裂缝出现时,FBG传感器测得相应位置的应变值。在破坏阶段,传感器布控区域相继出现裂缝损伤。利用FBG传感器测得了经历300万次疲劳循环后钢-混凝土组合桥面板模型混凝土顶发生裂缝损伤的临界应变值并追踪裂缝损伤的发展。与传统电测方式相比,FBG传感器显示了灵敏度高、精度高、测试范围大等优点。     

EQ6700EV3整车电气控制系统的设计与研究

根据燃料电池的特殊性和使用要求,对EQ6700EV3燃料电池电动客车的整车电气控制系统进行了分析,并对 燃料电池、DC/DC变换器、电机控制器等电气系统与整车电气控制系统的关系进行了分析。     

混凝法在电厂燃油净化污水处理中的应用研究

分别试用几种国产常用的絮凝剂和作者开发的复合絮凝剂（ＰＦＴ）,处理电厂燃油净化污水,并将处理结果比较分析,得出的结论是：ＰＦＴ是一种比较经济有效的絮凝剂,如还采用聚丙烯酰胺（ＰＡＭ）作助凝剂则可以取得更好的效果。该工艺具有投药量少、混凝搅拌时间短、沉降速度快、污泥含量少、出水水质好等优点。