基于CAN总线的嵌入式汽车电子测试系统

为满足汽车厂商对于汽车电子产品的测试需求,提出了基于CAN总线和嵌入式技术的汽车电子检测系统的实现方法。以USB车载音频娱乐系统的测试仪器为例对该方法进行了具体解释,首先给出了硬件设计的基本结构,重点描述了CAN总线控制器和驱动器的电路设计;其次说明了软件设计的分层结构,采用Wince作为仪器的操作系统,具体分析了CAN总线驱动程序在Wince中的实现;最后描述了上层应用程序的具体流程。USB部件测试仪器已成功应用于现场生产中,并取得了良好效果,实践表明,该测试方法是一种有效的解决方案,可以满足汽车厂商的测试需求。     

Linux软件开发平台加速消费电子与车载电子融合

车载信息娱乐市场与消费电子市场相互融合的趋势正在加快,车载信息娱乐市场将会是多媒体.通信和消费电子产品集中汇聚的地方.     

消费和汽车电子创新的灵魂

几乎无所不能的FPGA和CPLD 随着成本、功耗和容量的不断改善,FPGA和CPLD已经广泛渗透到消费电子和汽车电子应用市场,其市场份额几乎已与通信市场二分天下.但通信和工业领域仍是FPGA两块最大的终端用户市场,Cisco、华为,西门子等公司的交换机、无线基站等设备大量采用了FPGA进行设计.利用FPGA的可编程特性,甚至可以在设计完成以后对系统进行升级,以适应新的标准或提供更多的功能.     

ARM进一步深入汽车电子领域

恩智浦已经发布了面向普通市场的新型S32K系列微控制器,这些器件适用于汽车车身和电机控制应用.因此,恩智浦现在可提供基于ARM的器件,而这个领域过去一直被专有架构器件主导.车身应用对控制器的需求日益增加,此类产品还有很大发展空间.     

汽车电子三大热门方向的技术发展

本次专题邀请业界名家就新能源汽车、车联网、传统汽车三个方面分析了当下汽车电子的发展、动态及未来走向.     

Evolving microprocessors which better meet the needs of automotive electronics

The rather explosive historical progress being made in large-scale integration of semiconductor elements is moving faster than the two or three years lead time needed in the automotive industry to move a new idea into production. By presenting a forecast of what can be done soon at a developmental level, both at the automotive electronic-control level and at the LSI microcomputer single-chip development level, the writer hopes that the next generation of automotive electronics in the early 1980's can be started with a clear picture of the calculated risk-taking involved. Topics discussed are the need for custom microprocessors, input and output information rates, and applications to engine control and instrument panel display control, including the concept of satellite assemblies which exchange information available at remote locations.     

Bayesian prediction for the range with a burr distribution and a random sample size

This paper is concerned with the problem of predicting the future range with the two-parameter Burr distribution, given a sample of a random size and using the Bayesian approach. We consider two possible distributions of the random sample size and the results so obtained have been illustrated numerically, using iterative techniques and computer facilities.     

降低功耗的设计技巧使用这些设计技巧和ISE功能分析工具来控制功耗

新一代FPGA的速度变得越来越快,密度变得越来越高,逻辑资源也越来越多.那么如何才能确保功耗不随这些一起增加呢?很多设计抉择可以影响系统的功耗,这些抉择包括从显见的器件选择到细小的基于使用频率的状态机值的选择等.     

Product attribute bullwhip in the technology planning process and a methodology to reduce it

This paper considers the upstream flow of product attribute forecast information often used to drive the technology planning process. It is noted that, while downstream customers are willing to pay for improvements in key product attributes, they do not always provide accurate and timely product attribute forecasts to upstream suppliers. As a result of this increasing distortion of product attribute demand as information flows upstream, upstream suppliers often either fail to develop technology that will be needed in the marketplace or develop technology that ultimately is unused. This is shown to be a strategic, technology planning analog to the tactical, order decision problem of order quantity bullwhip observed in the field of supply chain management. As such, we define the technology planning problem under consideration here as "product attribute bullwhip." Based on solutions employed to address order quantity bullwhip in supply chain management, we propose a methodology to reduce product attribute bullwhip by comparing product attribute information obtained directly from the end user with that which flows upstream through the supply chain. To illustrate this effect, we apply the proposed methodology to an example from the wireless communication industry by comparing trends in the perceived value of cellular telephone handset face area with trends in the perceived value of face area observed at the component level of the supply chain.     

Signal-processing techniques to reduce the sinusoidal steady-stateerror in the FDTD method

Techniques to improve the accuracy of the finite-difference time-domain (FDTD) solutions employing sinusoidal excitations are developed. The FDTD computational domain is considered as a sampled system and analyzed with respect to the aliasing error using the Nyquist sampling theorem. After a careful examination of how the high-frequency components in the excitation cause sinusoidal steady-state errors in the FDTD solutions, the use of smoothing windows and digital low-pass filters is suggested to reduce the error. The reduction in the error is demonstrated for various cases     

Bayesian prediction for the range based on a two-parameter exponential distribution with a random sample size

This paper is concerned with the problem of predicting the range of a future sample when the underlying distribution is a two-parameter exponential distribution. A Bayesian prediction distribution of the range will be derived under the assumption that the old sample is a censored type II and the sample size of the future sample is a random variable. A numerical illustration is provided.     

emitel：汽车电子出口认证应避免观念误区

近日，汽车产品测试专家emitel（宜美德）获得”美国MET认可实验室资格证书”，来自美国MET总裁RobFrier先生和emitel（宜美德）的执行董事谭耀辉先生专门出席了此次颁证仪式。会上，针对新版E—mark标准ECER10．03从2009年7月12日起被强制使用的情况，《电子质量》记者采访了emitel（宜美德）的高级经理陆世杰先生。     

Bayesian prediction of the jth order statistic with burr distribution and a random sample size

This work is concerned with the Bayesian prediction problem of the j order statistic when the size of the future sample is a random variable and the samples are drawn from a generalized Burr distribution (GBD). A numerical illustration is also given.     

A mixed poisson model and its application to attribute testing data

A two-component mixed Poisson distribution useful in modeling and analyzing of certain quality and reliability data is studied in this paper. Its statistical properties, physical interpretations, and some practical issues are discussed. The model generalizes a previously proposed model which describes a perfect process subject to random shocks. The approach of using the model and its application are highlighted using some actual data.     

单芯片技术为手机瘦身

手机作为人们生活中越来越必不可少的通讯工具,自1983年正式问世以来,在经历短短的二十多年的飞速发展,已使我们的生活变得更加方便快捷。从刚开始的只能实现双方语音收听,到现在的个性铃声、文字短信、彩色信息等多媒体功能,手机正在向功能更强大、速度更快、更轻薄和小巧的方向发展。     

Algorithm transformation methods to reduce the overhead of software-based fault tolerance techniques

This paper introduces a framework that tackles the costs in area and energy consumed by methodologies like spatial or temporal redundancy with a different approach: given an algorithm, we find a transformation in which part of the computation involved is transformed into memory accesses. The precomputed data stored in memory can be protected then by applying traditional and well established ECC algorithms to provide fault tolerant hardware designs. At the same time, the transformation increases the performance of the system by reducing its execution time, which is then used by customized software-based fault tolerant techniques to protect the system without any degradation when compared to its original form. Application of this technique to key algorithms in a MP3 player, combined with a fault injection campaign, show that this approach increases fault tolerance up to 92%, without any performance degradation.     

The use of estimation techniques to reduce noncoherent polarimetricmeasurement errors

Polarimetric measurements contain errors owing to random thermal energy in the receiver and system phase noise. These errors can be reduced using estimation techniques that account for general properties of the Mueller matrix. In this paper, we show how Kalman (1960) filter techniques improve and speed up the estimation of a target's Mueller matrix when the noncoherent measurement technique is used. Measurements obtained with a 95-GHz polarimeter demonstrate that fewer independent samples of the backscattered fields are needed to obtain an accurate estimate if Kalman filtering is used than if a pseudo inversion process is used