【作者】 黄伟；

【导师】 凌玉华；

【作者基本信息】 中南大学 ， 计算机技术， 2009， 硕士

【摘要】 针对传统电路板组件功能测试仪器方面的不足,例如测试平台不统一、软件开发周期长、测试项目少且数据不精确,数据采集方式落后等,以电子式电能表为例,设计了基于虚拟仪器软件LabVIEW8.2开发平台的PCBA在线功能系统,以简化测试系统的硬件和软件设计,实现测试系统的智能化。基于LabVIEW的电路板组件在线功能测试系统,是利用虚拟仪器开发平台LabVIEW、数据采集卡有关传感器设计的一种虚拟仪器。论文采用自顶而下的模块化设计方法,充分调用LabVIEW的子VI函数功能,利用DAQ(Data acquisition硬件数据采集)技术设计了实时采样模块,完成了对测试信号的采样;利用NI-VISA软件包强大的功能函数,设计并实现了PC机与测试程控源之间的通信和控制,为产品在线的自动化测试提供基础。设计了系统参数设置模块、电源板测试模块、逻辑板测试模块、测量数据处理与显示模块、数据库管理与波形显示模块,以及通信模块;最后利用数据采集卡PCI-6024E采集数据,对其各项功能分别进行了测试和分析,测试结果表明该测试系统满足了测试要求,达到了相应的技术指标。更多还原

【Abstract】 Traditional measuring instruments for testing the function of the Printed circuit board assembly have many problems, such as non-uniform test platform, long-cycle software development, test items less and data accurate low, and the data collection methods old. Based on LabVIEW8.2, for an example of Electronic Energy Meter, virtual instrument system for detecting the function of PCBA on-line is designed to simplify the test system hardware and software design, and the realization of the intelligent test system.By applying data acquisition cards, and sensors, the functional test system of circuit board based on virtual instrument is designed on LabVIEW development platform. It is a kind of virtual instrument. The top-down modular design approaches is employed for this system. A real-time sampling module is designed to sample the test signal by a subset of the full call LabVIEW function VI and the DAQ (data acquisition hardware Data Acquisition) technology. According with NI-VISA Package provides the powerful functions, it designed and implemented a the communication and control module between the PC and the control-power, that provides the basis for automated testing. Additional to this, many other modules of the system are designed, such as the system parameters setting module, power board testing module, the logic board test module, parameter measurement and display module, database management module, and the communication module for reading and writing. Finally, by using the data acquisition card PCI-6024E, the functions of this system are tested and analysis separately, and the test results show that the test system meets the testing requirements and corresponds with the technical metrics.更多还原