基于虚拟仪器的自动测试系统设计

Design of Automatic Test System Based on Virtual Instrument

目前由于电子信息和计算机等技术的飞速发展,仪器设备的测试复杂程度越来越高,传统的测试仪器已经难以满足绝大多数设备的测试需求;针对当前的军用配电器测试系统操作复杂、成本高等问题,设计了一种基于虚拟仪器的自动测试系统;系统的提出可以提高系统单元测试的先进性、通用性、规范化以及自动化程度,并且可以完成配电器自动化测试、装置的功能测试、电阻测试、延时时间测试,以及对装置振动测试过程中的继电器触点闭合状态可靠性的监测;系统硬件主要由基于PXI总线的计算机和多种NI板卡构成,其中包括PXI-2737矩阵开关板卡、PXI-4072数字万用表板卡以及PXI-7811r数字I/O板卡等;软件部分采用LabVIEW作为自动测试系统的软件开发平台,使系统具有较强的扩展性和维护性;系统经实验测试实现了对测试数据的实时采集、显示及自动存储等功能,并完整地记录了被测配电器的测试数据。经实际应用系统满足了安全可靠,操作便捷,成本低,效率高的工程要求,适应现代化测试要求。

At present,due to the rapid development of electronic information and computer technology,the testing complexity of the equipment is becoming more and more high,the traditional testing instruments have been difficult to meet the test requirements of most equipment.An automatic test system based on virtual instrument is designed to solve the problems of complex operation and high cost of the current military distribution equipment testing system.The propesed system can improve the advanced nature,generality,standardization and automation of the system unit test,and can complete the automatic test of distribution equipment,the function test of the device,the resistance test,the delay time test.And monitoring the reliability of relay contact closing state in the process of vibration testing.The hardware of the system is mainly composed of a computer based on PXI bus and a variety of NI boards,including PXI-2737matrix switch board,PXI-4072digital multimeter board and PXI-7811r digital I/O board.In the software part,LabVIEW is used as the software development platform of the automatic test system,which makes the system more extensible and maintainable.The system realizes the functions of real-time acquisition,display and automatic storage of the test data,and records the test data of the distribution apparatus under test.The practical application system meets the engineering requirements of safety and reliability,convenient operation,low cost and high efficiency,and meets the requirements of modern testing.