基于虚拟仪器的发射机控制器测试系统设计
发布时间：2018-11-02 20:26
【摘要】：发射机控制器作为发射机的重要装置,可用于控制其开关机,并实时监测其运行状态,在发射机发生故障时能及时记录故障并且对发射机实施保护,为发射机的正常运行提供保障。为保障发射机的正常运行,必须保证控制器的质量。目前,陕西如意广电科技有限公司对发射机控制器的测试主要以人工测试为主,存在测试工作强度大,测试周期长,准确率低等问题。故针对该公司对控制器的测试需求,设计基于虚拟仪器的测试系统对控制器进行测试。本文的主要工作如下:(1)制定系统测试方案。测试系统以PC机为核心,结合数据采集卡和适配器对被测控制器进行测试。PC机控制整个测试过程,并进行数据存储和显示;数据采集卡根据PC机指令,向控制器输出合适的模拟量和开关量,并采集被测控制器的响应信号给PC机;适配器实现被测控制器与数据采集仪器之间接口的连接。(2)系统硬件设计。硬件设计主要包括数据采集卡的选型和适配器接口的设计。根据需要采集和输出信号的数目以及采样率等参数选择了研华的基于PCI总线的数据采集卡PCI-1724U-AE和PCI-1730U-BE;为了实现被测控制器与数据采集卡之间信号的传输,通过分析被测控制器与数据采集卡的接口特点,设计了适配器。(3)系统软件设计。采用Lab VIEW作为开发工具,将软件设计分为三层,主程序层、功能模块实现层、硬件驱动层。主程序层通过人机交互界面实现对子程序的调用;功能模块实现层主要是对用户登录和管理、数据采集与输出、自动测试、故障诊断、数据分析处理和存储,数据通信等功能模块进行设计,其中故障诊断模块采用基于故障查表的快速故障诊断模式和神经网络专家系统深度故障诊断模式进行实现;硬件设备驱动层完成与所使用的仪器和设备之间的通信,实现硬件芯片具体功能,为应用程序提供访问硬件设备的接口,直接选择研华提供的驱动控件进行编写。(4)验证测试系统功能。在实验室对被测控制器整体功能进行了测试,并且在人为设置故障后,对测试系统的故障诊断功能进行了验证,对测试结果进行了分析。实验室测试结果表明,该系统基本可以满足测试需求,可以完成对控制器整体功能的测试,保证发射机控制器出厂质量,可以对一些人为设置的故障进行识别,作出判断,实现部分故障诊断,为控制器后期的故障排除及维护提供便利。该系统能够帮助测试人员提高工作效率,降低工作强度。
[Abstract]:Transmitter controller, as an important device of transmitter, can be used to control its switching machine and monitor its running status in real time. It can record the fault and protect the transmitter in time when the transmitter fails. Provides the guarantee for the normal operation of the transmitter. In order to ensure the normal operation of the transmitter, the quality of the controller must be guaranteed. At present, the testing of transmitter controller in Shaanxi Ruyi Radio and Television Co., Ltd is mainly manual testing, which has many problems, such as high work intensity, long test period and low accuracy. Therefore, a virtual instrument based test system is designed to test the controller. The main work of this paper is as follows: (1) make the system test scheme. The test system takes PC as the core, and combines the data acquisition card and adapter to test the tested controller. The PC machine controls the whole test process, and carries on the data storage and display. According to the instruction of PC, the data acquisition card outputs the appropriate analog quantity and switch quantity to the controller, and collects the response signal of the tested controller to the PC machine. The adapter realizes the connection of the interface between the controller and the data acquisition instrument. (2) the hardware design of the system. Hardware design mainly includes data acquisition card selection and adapter interface design. The data acquisition card PCI-1724U-AE and PCI-1730U-BE; based on PCI bus are selected according to the data acquisition and output signal number and sampling rate. In order to realize the signal transmission between the measured controller and the data acquisition card, the adapter is designed by analyzing the interface characteristics of the tested controller and the data acquisition card. (3) the software design of the system. Using Lab VIEW as the development tool, the software design is divided into three layers, the main program layer, the functional module realization layer and the hardware driver layer. In the main program layer, the subroutine is called through the man-machine interface. The realization layer of the function module mainly designs the function modules such as user login and management, data acquisition and output, automatic test, fault diagnosis, data analysis, processing and storage, data communication, etc. The fault diagnosis module adopts the fast fault diagnosis mode based on the fault lookup table and the deep fault diagnosis mode of the neural network expert system. The hardware device driver layer completes the communication with the instruments and devices used, realizes the specific function of the hardware chip, and provides the interface for the application program to access the hardware device. Direct choice of the driver provided by Yanhua to write. (4) verify the function of the test system. The whole function of the tested controller was tested in the laboratory, and the fault diagnosis function of the test system was verified after the artificial fault was set up, and the test results were analyzed. The results of laboratory test show that the system can basically meet the test requirements, can complete the testing of the overall function of the controller, ensure the quality of the transmitter controller, identify and judge some man-made faults. Part of the fault diagnosis is realized, which is convenient for the troubleshooting and maintenance of the controller. The system can help the testers improve their working efficiency and reduce the working intensity.
【学位授予单位】：陕西科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN830;TP274
[Abstract]:Transmitter controller, as an important device of transmitter, can be used to control its switching machine and monitor its running status in real time. It can record the fault and protect the transmitter in time when the transmitter fails. Provides the guarantee for the normal operation of the transmitter. In order to ensure the normal operation of the transmitter, the quality of the controller must be guaranteed. At present, the testing of transmitter controller in Shaanxi Ruyi Radio and Television Co., Ltd is mainly manual testing, which has many problems, such as high work intensity, long test period and low accuracy. Therefore, a virtual instrument based test system is designed to test the controller. The main work of this paper is as follows: (1) make the system test scheme. The test system takes PC as the core, and combines the data acquisition card and adapter to test the tested controller. The PC machine controls the whole test process, and carries on the data storage and display. According to the instruction of PC, the data acquisition card outputs the appropriate analog quantity and switch quantity to the controller, and collects the response signal of the tested controller to the PC machine. The adapter realizes the connection of the interface between the controller and the data acquisition instrument. (2) the hardware design of the system. Hardware design mainly includes data acquisition card selection and adapter interface design. The data acquisition card PCI-1724U-AE and PCI-1730U-BE; based on PCI bus are selected according to the data acquisition and output signal number and sampling rate. In order to realize the signal transmission between the measured controller and the data acquisition card, the adapter is designed by analyzing the interface characteristics of the tested controller and the data acquisition card. (3) the software design of the system. Using Lab VIEW as the development tool, the software design is divided into three layers, the main program layer, the functional module realization layer and the hardware driver layer. In the main program layer, the subroutine is called through the man-machine interface. The realization layer of the function module mainly designs the function modules such as user login and management, data acquisition and output, automatic test, fault diagnosis, data analysis, processing and storage, data communication, etc. The fault diagnosis module adopts the fast fault diagnosis mode based on the fault lookup table and the deep fault diagnosis mode of the neural network expert system. The hardware device driver layer completes the communication with the instruments and devices used, realizes the specific function of the hardware chip, and provides the interface for the application program to access the hardware device. Direct choice of the driver provided by Yanhua to write. (4) verify the function of the test system. The whole function of the tested controller was tested in the laboratory, and the fault diagnosis function of the test system was verified after the artificial fault was set up, and the test results were analyzed. The results of laboratory test show that the system can basically meet the test requirements, can complete the testing of the overall function of the controller, ensure the quality of the transmitter controller, identify and judge some man-made faults. Part of the fault diagnosis is realized, which is convenient for the troubleshooting and maintenance of the controller. The system can help the testers improve their working efficiency and reduce the working intensity.
【学位授予单位】：陕西科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN830;TP274
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