基于虚拟仪器的机载设备便携式维护辅助检测仪的研究

发布时间：2019-04-28 08:56

【摘要】：目前，测试技术向着自动化、多功能和数字化的方向发展。被测试设备及其测试策略越来越复杂，被测试设备接口数量与测试资源接口数量之间产生了难以匹配的矛盾。此外，现在测试技术正在由专用化向通用化发展，虚拟仪器技术很好地解决了在转型过程中硬件平台的通用性与软件驱动的可移植性等问题。本文设计的便携式维护辅助检测仪（PMA）是基于PC/104-Plus总线和虚拟仪器技术，可自动完成对机载电子设备的数据采集、处理与测试。同时，该检测仪内嵌交互式电子技术手册（IETM），能够满足自动测试设备数字化与无纸化的要求。便携式维护辅助检测仪主要包括测试平台和接口切换阵列适配模块。测试仪平台主要完成对机载电子设备的数据采集与处理，由基于PC/104-Plus总线的功能板卡自我堆栈而成，，符合便携性和低功耗的要求。采用PC/104-Plus工业控制模块，主要功能板卡分别完成模拟量的数据采集、数字量信号的检测、电压测量、电流测量、阻抗测量、1553B信号测量和RS422总线通讯。测试软件编程平台采用Windows XP结合NI的虚拟仪器的集成开发软件系统LabWindows/CVI。自制接口切换适配阵列模块，该阵列模块完成输入信号的调理，测试节点与测试通道的切换的功能。接口适配模块主要解决了被测试设备接口数量与测试资源接口数量不匹配的矛盾。针对机载电子设备信号的特点，完成接口适配器中开关矩阵的通道切换功能测试，调理电路测试和各板卡的功能性测试。经测试，检测仪系统实现了所有设计的功能，性能稳定可靠，下一步将到现场与机载电子设备对接联调。
[Abstract]:At present, testing technology is developing in the direction of automation, multi-function and digitalization. The equipment under test and its testing strategy are becoming more and more complex, and there is a contradiction between the number of interfaces between the tested equipment and the number of test resource interfaces. In addition, the testing technology is developing from specialization to generalization. Virtual instrument technology solves the problems of hardware platform generality and software-driven portability in the process of transformation. The portable maintenance assistant detector (PMA) designed in this paper is based on PC/104-Plus bus and virtual instrument technology. It can automatically complete the data acquisition, processing and testing of airborne electronic equipment. At the same time, the embedded interactive electronic technology manual (IETM), can meet the requirements of digitization and paperless of automatic test equipment. Portable maintenance assistant detector mainly includes test platform and interface switching array adaptation module. The test instrument platform mainly completes the data acquisition and processing of the airborne electronic equipment, which is made up of the self-stack of the function board based on PC/104-Plus bus, which accords with the requirements of portability and low power consumption. Using PC/104-Plus industrial control module, the main function board card completes analog data acquisition, digital signal detection, voltage measurement, current measurement, impedance measurement, 1553B signal measurement and RS422 bus communication respectively. Integrated Development of Virtual instrument based on Windows XP and NI on Test Software programming platform LabWindows/CVI. The self-made interface switch adaptor array module completes the adjustment of the input signal and the switch between the test node and the test channel. The interface adaptation module mainly solves the contradiction between the number of interface of test equipment and the number of interface of test resource. According to the signal characteristics of airborne electronic equipment, the channel switching function test of switch matrix in interface adapter, the test of conditioning circuit and the functional test of each board card are completed. After testing, the detector system realizes all the designed functions, and the performance is stable and reliable. The next step will be to connect and adjust with the airborne electronic equipment on the spot.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP302

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