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为了更方便地读取车载CAN总线报文信息,以便及时发现通信故障,确保车辆正常行驶,本文以飞思卡尔MC9S12XET256单片机为微处理器开发了基于CAN总线的纯电动汽车数据监测系统。该系统实现了CAN报文读取、解析、显示、存储及故障诊断等功能。本文介绍了系统最小核心单元、CAN线通信模块、U盘存储模块、时钟模块、界面显示模块等硬件电路设计及软件设计方法。 相似文献
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车用电控单元系统的CAN总线接口软硬件设计 总被引:5,自引:0,他引:5
本文对CAN总线的结构以及在汽车电控单元网络中的应用作了阐述,介绍了一种以51系列单片机为核心的微处理器系统的CAN总线接口电路和通讯软件的设计,最后给出了一个发动机故障诊断的应用实例。 相似文献
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由于PSD-BPA等电力系统分析软件的广泛使用,并且SCADA几乎覆盖了主网的所有设备,因此可以将SCADA实时数据作为电力系统潮流计算的数据源。这种实时数据源遵循IEC 61970标准中的公共信息模型规范,它为各家应用提供了与平台无关的统一的电力系统逻辑描述,理论上具有优秀的兼容性。但是BPA软件所要求的数据格式与实时数据源提供的格式并不兼容,且在工程实际中经常需要对某个时间断面下的电力系统进行潮流反演,目前一般通过手工方式填写BPA数据文件,工作量巨大。为解决这个困难,从标准入手,对公共信息模型的主要内容做了研究,探讨了CIM/XML、CIM/E与BPA的数据格式,以拓扑分析为技术核心,开发出了一种数据接口程序,可以在不需要人为干预的情况下,将基于CIM的电力系统实时数据快速转换为供BPA潮流软件计算用的数据文件。详细介绍了程序主要模块的原理与工作流程,并利用广西电网实时数据对程序进行测试,将转化出来的数据文件送入BPA进行潮流计算,计算结果收敛,且较接近实际情况。 相似文献
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本研究设计的系统由发动机仿真模型和CAN总线部分组成.CAN总线作为有前途的现场总线,将用于本系统仿真通讯中.系统应用ARM控制器作为核心单元、采用嵌入式技术实现发动机实时仿真并采用CAN总线协议将传感器、输入控制变量和发动机参数集成一体.最后,对整个系统进行检测实验.仿真实验表明系统运行稳定可靠,能够模拟发动机运行,系统性能良好. 相似文献
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基于CAN总线的ECU自动测控系统的研发 总被引:1,自引:0,他引:1
介绍了一种先进的基于CAN总线的MCS自动测控系统,它可以直接获取产品ECU中的核心数据,并为ECU的自主研发提供检验支持。针对ECU研发的不同阶段,分别设计了硬件在环仿真和上车实测两个测试平台。系统ECU硬件系统以MPC563系列芯片为CPU,控制软件程序在CodeWarrior环境下编制;并使用VC 6.0开发了具有友好人机交互界面的MCS平台软件,使得数据的显示控制更加直观简明。实测结果显示,MCS的自动化测量减少了工作量,加快了ECU研发进程。 相似文献
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在内燃机台架试验测试平台的基础上,利用基于PCI总线技术开发了一套新型的计算机测试系统.该系统是一种实时计算机测试系统,能够提供一种适应性强、高效率的测试平台. 相似文献
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风电机组的电能质量测试不同于传统负荷的电能质量测试,需要排除电网特性和其他负荷的影响,并考虑不同风速对测试结果的影响.目前常规的电能质量测试仪器无法完成测试。风电机组电能质量测试系统选择高性能的PC测量仪器作为硬件采集平台.通过搭建虚拟电网排除电网结构及其他负荷产生的影响,采用适合风电机组的数字化闪变仪算法实现了风电机组的电能质量测试。测试系统通过对典型风电机组实际测试,证明测试系统完全能够满足风电机组电能质量测试标准IEC61400—21的要求。 相似文献
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A new inexpensive state-of-the-art data-acquisition system, called Suryavijay, for solar radiation, wind and climatological data corresponding to long periods, has been developed and is described in the paper. It acquires data without in situ computers at the field stations. The hourly data are stored in an unpluggable 32 Kbyte EPROM for 24 channel months. The information in the EPROM from a field station is downloaded in a mainframe or personal computer at the mother station. Suryavijay uses a 12 bit analog-to-digital convertor for high resolution and an INTEL 6216 tristat analog multiplexer which accepts differential signals from the sensors and makes the system expandable in integral multiples of 8 channels. It has specially tailor-made signal-conditioning circuits for solar, wind and climatological data channels. In addition, Suryavijay is cost-effective, which makes it possible to have a greater number of field stations in a solar radiation, wind and climatological data network. 相似文献
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Estimation of solar energy potential of a region requires detailed solar radiation climatology, and it is necessary to collect extensive radiation data of high accuracy covering all climatic zones of the region. In this regard, a wireless data acquisition system (WDAS) would help to estimate solar energy potential considering the remote region’s energy requirement. This article explains the design and implementation of WDAS for assessment of solar energy. The proposed system consists of a set of sensors for measuring meteorological parameters. The collected data are first conditioned using precision electronic circuits and then interfaced to a PC using RS232 connection via wireless unit. The LabVIEW program is used to further process, display and store the collected data in the PC disk. The proposed architecture permits the rapid system development and has the advantage of flexibility and it can be easily extended for controlling the renewable energy systems like photovoltaic system. The WDAS with executive information systems and reporting tools helps to tap vast data resources and deliver information. 相似文献
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Hocine Belmili Salah Med Ait Cheikh Mourad Haddadi Cherif Larbes 《Renewable Energy》2010,35(7):1484-1492
Testing photovoltaic generators performance is complicated. This is due to the influence of a variety of interactive parameters related to the environment such as solar irradiation and temperature in addition to solar cell material (mono-crystalline, poly-crystalline, amorphous and thin films). This paper presents a computer-based instrumentation system for the characterization of the photovoltaic (PV) conversion. It based on a design of a data acquisition system (DAQS) allowing the acquisition and the drawing of the characterization measure of PV modules in real meteorological test conditions. 相似文献
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In the testing of ocean wave energy devices, the demand for a portable and robust data acquisition and electrical loading system has become apparent. This paper investigates the development of a 30 kW inclusive system combining loading capabilities, real-time power analysis, and data acquisition for the testing of deployed ocean wave energy devices. Hardware results for ocean testing are included. 相似文献
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