基于LabVIEW的多传感器调理电路测试系统的设计与实现

发布时间：2018-05-02 15:07

本文选题：测试系统 + 多路测试　；参考：《中北大学》2017年硕士论文

【摘要】：为满足冲击、噪声、温度传感器调理电路的性能测试,设计了基于虚拟仪器LabVIEW的测试系统。该系统由信号源卡、万用表卡、开关量卡、PXI机箱及主控卡组成。测试系统能够对98路传感器调理电路进行性能方面的自动测试,并对测试结果生成报表。测试系统具有人性化的人机交互界面,一键式操作,简化了在测试过程中的繁琐操作,并且测试系统还可以在软件与硬件方面进行功能的拓展。系统的设计首先从测试需求出发,明确测试系统的组成和各个模块的功能。然后对系统进行整体方案设计,并对系统中硬件的选用进行了介绍。之后对测试系统从硬件与软件方面分别进行了分析,硬件方面主要从万用表卡、信号源卡、开关量卡方面进行了介绍和功能的分析。其中万用表卡的作用是对调理电路的直流输出电压、交流输出电压及输出幅值进行测试;信号源卡是为测试系统提供信号发生的装置,主要完成调理电路输入端的信号发生与扫频功能;开关量卡将调理电路与测试系统连接起来,组成闭环测试系统。软件方面主要对LabVIEW软件及其优势进行了介绍,并对软件的调试进行了简单说明。论文着重对测试系统的软件设计进行了介绍和讨论,从测试系统程序的总体设计入手,详细阐述了系统界面的设计以及系统各测试项的程序设计。系统根据测试需求将测试项分为零位电压及纹波测试、输出幅值测试、限幅测试、幅值衰减测试、输出阻抗测试项,并对系统在设计及测试过程中的问题进行了分析和程序的优化。最后,系统对调理电路进行了自动测试,并对测试结果进行了分析,验证了测试系统设计的合理性、实时性、可靠性。
[Abstract]:A test system based on virtual instrument LabVIEW is designed to satisfy the performance test of conditioning circuit of shock, noise and temperature sensor. The system is composed of a signal source card, a multimeter card, a switch quantity card and a PXI chassis and a main control card. The system can automatically test the performance of 98-channel sensor conditioning circuit and generate a report on the test results. The test system has humanized man-machine interface, one-key operation, which simplifies the tedious operation in the testing process, and the test system can also expand the function of software and hardware. The design of the system starts from the test requirements, and clarifies the composition of the test system and the functions of each module. Then the overall scheme of the system is designed, and the selection of hardware in the system is introduced. After that, the hardware and software of the test system are analyzed respectively. The hardware is mainly introduced from the aspects of multimeter card, signal source card and switch quantity card. The function of the multimeter card is to test the DC output voltage, AC output voltage and output amplitude of the conditioning circuit, and the signal source card is a device to provide signal generation for the test system. It mainly completes the signal generation and frequency sweep function of the input end of the conditioning circuit, and the switch load card connects the conditioning circuit with the test system to form a closed-loop test system. In the aspect of software, LabVIEW software and its advantages are introduced, and the debugging of the software is briefly explained. This paper mainly introduces and discusses the software design of the test system, starting with the overall design of the test system program, expounds the design of the system interface and the program design of each test item in the system in detail. According to the test requirements, the system divides the test items into zero voltage and ripple test, output amplitude test, limiting test, amplitude attenuation test, output impedance test item. The problems in the design and test of the system are analyzed and the program is optimized. Finally, the system has carried on the automatic test to the conditioning circuit, and has carried on the analysis to the test result, has verified the rationality, the real-time, the reliability of the test system design.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212;TP311.52

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