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硅制传感器已有20多年历史,但它进入汽车工业并扮演重要角色只是近几年的事。传感器的另一个发展方向是可测量更多变量。美国汽车城底特律的汽车工程师们断言,硅将使新一代传感器变得更加小型化、智能化、价格也将大幅下降。 汽车设计人员选用硅传感器有几大因素。首先,硅传感器小巧、轻便,比原机电传感器更精确,可集成到微信息处理机,提供安全所需及排 相似文献
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温度传感器、压力传感器、速度传感器、湿度传感器……一辆普通轿车不仅平均传感器数量越来越大,种类也越来越繁多。这些形形色色的传感器坚守于汽车的各个关键部位,承担起汽车自身检测和诊断的重要责任,将汽车时时刻刻的温度、压力、速度及湿度等传达到汽车的神经中枢,从而将汽车故障消于未形,因此,有人形象地将传感器形容为敏感的汽车神经末梢。 相似文献
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功能强大的电控模块如水银泻地般地向汽车的各个领域渗透,刺激着汽车传感器单车用量的急剧增长。通过持续的技术创新和整合,传感器件不断拓宽渗入乘用车各个系统。传感器的应用给汽车增加了许多新功能(自适应的随行控制、无钥匙车门等),同时这种应用还借助于减轻重量和降低成本来间接地提高整车的性价比。 相似文献
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1传感器的功能传感器作为汽车电子控制系统的信息源,是汽车电子控制系统的关键部件,也是汽车电子技术领域研究的核心内容之一。车用传感器也是一项促进汽车高档化、电子化、自动化发展的关键技术。目前汽车行业已经成为传感器的最大用户。由于汽车传感器技术相对于汽车传统的机 相似文献
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近年来,随着金属薄膜技术、半导体扩散技术、陶瓷烧结技术等领域的发展,各种性能优异的电子传感器在汽车系统中不断应用,特别是微机的应用更促使汽车电子传感技术有了很大发展。国外汽车电子化的发展速度很快,装有各种先进电子设备的新型汽车不断面世。电子传感器是汽车电控系统中的主要组成部分,也是促进汽车电子化迅速发展的关键技术之一。据有关资料报道,一辆汽车一般要装用40~50 相似文献
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传感器是汽车电子技术领域的绝对核心,随着科学技术的飞速发展,汽车所使用的传感器已高达数百个,各类传感器的组合应用,极大促进了现代汽车电子技术的进步与改革。本文将以传感器在汽车电子技术中发挥的主要作用,以及汽车电子技术发展新常态下对传感器所提出的全新要求为切入点,针对当前车用传感器的主要类型以及传感器在不同位置的具体应用进行初步探讨与分析,希望借此可对相关从业人员起到一定借鉴价值。 相似文献
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Optimal sensor placement on freeway corridor is of great interest to transportation authorities. However, current traffic sensors are easily subject to various failures. Therefore, it is necessary to incorporate sensor failure into the optimal sensor placement model. In this article, a two-stage stochastic model is proposed for the purpose of travel time estimation on freeway corridor. To balance the effectiveness and reliability, a stochastic conditional value at risk (CVaR) model is also proposed. Since both models are too complicated, a customized genetic algorithm is developed. Numerical experiments show that considering sensor failure makes a significant performance improvement in the sensor placement pattern. Sensitivity analysis is also applied to investigate the impact of a number of allowable sensors and different traffic sensor failure probability. 相似文献
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AE888作为大众的明星发动机,更新到的第三代发动机性能更为出色,因此本文主要介绍如何利用曲轴位置传感器和凸轮轴位置传感器波形来分析发动机正时情况。发动机正时错误是导致发动机抖动的主要原因之一,以往验证正时都是通过正时工具、正时记号。都需要拆卸部分零部件才得以验证,本文通过对比G28、G40两个传感器波形就可以判断发动机正时情况。 相似文献
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在电喷摩托车发动机进入闭环控制工况时,ECM将根据氧传感器的电压信号来修正喷油脉宽,使混合气浓度保持在理论空燃比附近。借助发动机数据分析系统对各工况下的氧传感器波形进行分析判断,有助于快速检测出电喷系统中是否存在影响尾气排放的空燃比反馈故障。同时对于完成故障维修的车辆,通过氧传感器波形分析可以验证出维修是否有效,故障是否彻底排除。使车辆在日常使用中的尾气排放也能达到一个良好的状态。 相似文献
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This article evaluates the stop-bar detection and count performance of three advanced vehicle detection sensors under various environmental conditions at a signalized intersection. Continuing advancements to vehicle detection technologies and improvements to their detection capabilities to overcome issues from impacting conditions necessitates testing the performance of new and upgraded sensor products to evaluate their performance and identify the most suitable products for various climates and weather conditions. The three evaluated sensors were Autoscope Encore video, Iteris Vantage Edge 2 video, and Wavetronix SmartSensor Matrix microwave sensors. The three sensors performed with high detection sensitivity during ideal environmental conditions with up to 99.9% detection accuracy levels and are suitable for traffic monitoring centers that rely on remote access to the monitored sites and the collected data. However, they were affected by some extreme adverse weather conditions, mainly daytime and nighttime snow, daytime fog, dawn lighting, and strong winds (for high mounted devices). The selection of a sensor product will depend on the type of application and the priority given to the type of traffic data being collected. Overall, the Iteris video sensor performed with the highest detection sensitivity levels, with the Wavetronix Matrix microwave sensor performing similarly under most conditions (14 of 19 evaluated conditions). Autoscope video provided the highest count accuracies and also provides a much broader data collection capability. The results of this study will help transportation agencies in selecting suitable vehicle detection sensor technologies for future installations within their jurisdiction and improved data collection. 相似文献
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节气门位置传感器(TPS)是电子控制燃油喷射式发动机上的重要组成部分,传统的接触式节气门传感器已不能满足现代人们的需求。文章设计了一款基于巨磁效应的车用TPS,采用巨磁阻芯片作为感应元件,在结构和材料上对传统TPS进行改进和优化,并和传统的磁钢进行比较,结果表明,此款TPS在灵敏度和分辨率上有明显改善。证明了基于巨磁阻效应的TPS的设计可行。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(6):471-477
Active safety systems would benefit from tyre force and friction potential information. Different sensor concepts, including, among others, the EU–funded Apollo–project developed tyre sensor based on optical position detection, are being studied. The sensor can measure tyre carcass deflections with respect to the rim. The carcass deflections can be used to calculate tyre forces and they may be exploited in the estimation of friction potential. The waveforms of the sensor signal are illustrated. The vertical and lateral force estimations are presented with unavoidable compensation parts. The tyre sensor measurements were compared to the measurement–vehicle results and good correlations achieved. Continuing activities are concerned with the estimation of friction potential and the detection of aquaplaning. 相似文献