汽车黑匣子抗干扰技术

汽车黑匣子是实时采集并记录汽车行驶状态的电子仪器，作用是保证行车安全和为道路交通事故责任分析提供信息，但汽车黑匣子工作环境恶劣，外界干扰大，需具有较强抗干扰能力才能正常工作。本文通过对汽车黑匣子所受干扰种类、作用部位及影响进行分析，从汽车黑匣子硬件和软件两个方面提出了各种抗干扰措施，能有效提高汽车黑匣子工作可靠性。     

图像处理技术在机动车检测行业中的应用

数字图像处理是近年来快速发展的一门学科,本文介绍了图像处理在汽车检测行业中的应用。重点介绍了在机动车前照灯检测仪、汽车车牌识别系统以及汽车车身曲面形状X测量中的应用,这些应用充分体现了图像处理技术精度高、系统可靠性好、快速、灵活等优点。     

Thin-film technology and dc-SQUID instrumentation for a superheated superconducting detector

We report on improvements of the dc-SQUID instrumentation developed to study superheating-supercooling transitions of thin-film indium dots. In previous measurements on ordered arrays of dots with diameters larger than 100µm the flip signal of an individual dot in perpendicular magnetic field has been detected. In order to use these dots as superheated superconducting detectors it is necessary to reduce the dot diameter to lower the energy threshold and to avoid intermediate states. For these reasons, our effort has been to develop small and thick dots with diameter down to10 µm and thickness up to3.5 µm. At the same time the coupling with the dc-SQUID readout was improved using a thin-film niobium pickup coil integrated on the same chip containing the dots. Phase transitions of individual dots were observed. The superheating phase transition spread in temperature of the samples was about 0.15 %.     

基于FPGA的网络导纳测量仪设计与实现

为了实现对无源端口网络的导纳进行自动测量,根据虚拟仪器设计思想,设计实现了基于FPGA的网络导纳测量仪,系统以FPGA作为数字平台模拟产生优质的正弦信号,在单片机C8051的控制和处理下,自动实现端口网络（RL或者RC电路）导纳值的测量、计算、显示,同时具有频率步进测量功能。实验表明,该导纳测量仪性能稳定、操作简单、测量精度高,具有广阔的应用前景。     

四轮定位仪的性能评价与检测技术研究

本文针对国内四轮定位仪种类繁多、结构各异、水平不一 ,尚缺乏对其进行检测 校准与评价的技术手段的现状 ,提出了一种科学合理的实现方案。本方案在满足多种四轮定位仪的装夹要求的同时 ,能模拟产生准确的前束角、推力角、主销后倾角、主销内倾角、车轮外倾角等标准角度 ,实现了对四轮定位仪的检测校准。     

运动模糊图像恢复在汽车同步环检测中的应用

同步环是汽车变速箱的关键零件，同步环漏装会产生传动轴打齿现象，严重影响汽车的安全性能和使用寿命。采用机器视觉技术对同步环装配与否进行检测，是一种高效准确的在线检测方法。由于在生产线上水平运动的同步环和静止的摄像机之间存在相对运动，因此摄像机采集的图像模糊不清。针对运动模糊图像的复原算法进行了研究，分析了其退化的原因，建立了图像复原的数学模型，并根据图像复原的数学模型对运动模糊图像进行了图像复原处理，为后续图像处理做好了前期准备，并取得了令人满意的效果。     

伺服定位技术汽车大梁视觉测量系统研究

为实现对汽车底盘大梁上装配孔孔径和孔位尺寸的自动测量,设计基于伺服定位技术的视觉测量系统.基于大梁CAD设计图上装配孔的分布特征,划分目标图像采集区域,提取拍摄单帧图像时相机的位置坐标,并以该坐标值控制伺服电机运动和启停,触发相机采集目标图像;同时,伺服电机编码器反馈位置坐标给驱动器,为图像测量提供位置基准,对单帧图像上装配孔的圆心坐标进行归一化处理,从而实现对整个大梁尺寸的自动测量.实验结果表明:该系统对大梁装配孔的孔径尺寸测量误差约0.30 mm、孔位尺寸测量误差＜0.90 mm,能够实现汽车大梁关键尺寸非接触、全自动测量.     

Materials substitution in the mass produced automobile

This paper examines the hypothesis that appropriate materials substitution in the UK motor industry could reduce the Nations dependance on imported raw materials. It is believed that most of the findings apply to all Western European countries involved in the mass production of automobiles and also Japan. Current trends in materials substitution in the typical mass produced automobile are governed by legislation and cost and have resulted in some replacement of steel by plastics. This trend is expected to continue but only at an evolutionary pace. Hence although plastics are derived from indigenous raw materials (crude oil) and metals must be imported or obtained from secondary sources, the impact on the balance of imported to indigenous materials will be small.If greater fuel economy were to become mandatory the need to reduce weight in vehicles would increase the attraction of plastics based materials for large body parts. However with existing plastics processing technology production rates would be slower and vehicles consequently much more expensive.     

Applications of SAW resonators in high-performance instrumentation

The role that SAW (surface-acoustic-wave) resonators have come to play in high-performance test instrumentation is reviewed. The contributions made by SAW resonators in a number of Hewlett-Packard (HP) instrument applications are detailed. SAW-controlled oscillators are now the preferred design for precision frequency-control applications in the frequency range 200 MHz-1 GHz. The challenges in device design, fabrication, packaging and testing for these demanding applications are discussed.     

Fuzzy handling of measurement errors in instrumentation

This paper focuses on the use of possibility theory and of fuzzy subset theory to deal with the uncertainty of the measurements handled in instrumentation systems. Methods are described for building fuzzy subsets from numerical data coming from imprecise “physical” sensors on the one hand, and handling approximate estimations provided by “human” sensors on the other hand. The propagation of the fuzzy representation of acquired measures in further treatments, such as those involved in performance indicators aimed at controlling manufacturing production, is also considered     

新兴汽车市场之增长分析

2010年,随着金融海啸的退潮,全球经济正在复苏,各国汽车市场也迎来了春天,其中一些国家的汽车市场已经成为汽车出口新的增长点。我国汽车企业如何积极抢占这些新兴市场,拓展我国汽车的生存空间,如何突破这些国家的技术门槛和贸易壁垒,如何适应风俗习惯和气候差异,顺利进军这些市场,     

计数器寿命试验装置的研制

介绍一种用于计数器寿命试验的装置 ,具有结构简单、体积小、使用维修方便等特点。经实验表明该装置耗能少、成本低、所测数据准确。     

语音互联网展望

语音互联网是电话网与互联网的完美结合，通过语音互联，普通电话用户用自然语言对话的方式即可获取互联网的主要服务．本文结合自己的工作介绍了语音互联网的系统架构、优势、应用及实现方法．     

工程塑料在汽车轻量化中的应用进展

结合工程塑料的广阔应用前景及在汽车轻量化方面的发展趋势,综述了工程塑料在汽车动力系统、汽车照明技术、汽车装饰件、汽车安全化方面的发展状况,并分析工程塑料对汽车未来轻量化发展的推动作用.     

谈"机器视觉"在汽车制造业中的应用

通过几个实例，阐述了机器视觉的工作原理、技术特点和所显示的优越性，展现了这项新技术在汽车制造业中多个领域的应用前景。这些领域包括批量生产条件下的精密测量、工件表面缺陷检测、生产线中对零件标识和字符的自动识别以及判断装配结果是否正确等，文章同时指出，在一些用于汽车制造业的专用设备、如刀具预调测量仪中，机器视觉也已替代了传统的检测方式。