Virtual instrument is playing the important role in automatic test system. This paper introduces a composition of a virtual instrument automatic test system and takes the VXIbus based a test software platform which is...Virtual instrument is playing the important role in automatic test system. This paper introduces a composition of a virtual instrument automatic test system and takes the VXIbus based a test software platform which is developed by CAT lab of the UESTC as an example. Then a method to model this system based on Petri net is proposed. Through this method, we can analyze the test task scheduling to prevent the deadlock or resources conflict. At last, this paper analyzes the feasibility of this method.展开更多
A simple,stable and reliable virtual logic analyzer is presented. The logic analyzer had two modules:one was the test pattern generation module,the other was the logic monitoring module. Combining the two modules,one ...A simple,stable and reliable virtual logic analyzer is presented. The logic analyzer had two modules:one was the test pattern generation module,the other was the logic monitoring module. Combining the two modules,one is able to test a digital circuit automatically. The user interface of the logic analyzer was programmed with LabVIEW. Two Arduino UNO boards were used as the hardware targets to input and output the logic signals. The maximum pattern update rate was set to be 20 Hz. The maximum logic sampling rate was set to be 200 Hz. After twelve thousand cycles of exhaustive tests,the logic analyzer had a 100% accuracy. As a tutorial showing how to build virtual instruments with Arduino,the software detail is also explained in this article.展开更多
为降低设备故障对模拟电子技术实验教学效率的影响,基于虚拟仪器技术设计了一种集成运放自动测试教学辅助平台。利用集成化虚拟仪器实验平台NI ELVIS II进行数据传输,设计了测试电路板卡;利用Lab-VIEW软件设计了仪器面板和平台软件部分...为降低设备故障对模拟电子技术实验教学效率的影响,基于虚拟仪器技术设计了一种集成运放自动测试教学辅助平台。利用集成化虚拟仪器实验平台NI ELVIS II进行数据传输,设计了测试电路板卡;利用Lab-VIEW软件设计了仪器面板和平台软件部分。使用集成运放μA714芯片对平台进行了测试,并在模拟电子技术的实际教学中进行了效果验证。测试和实际使用结果表明,该平台可以准确检测出故障芯片,正确率>95%;相比于未使用本平台时,师生使用本平台进行实验的准确率提升超过20%,耗时降低超过20%。展开更多
On the basis of the more and more use of the electric testing and in-formation processing technology in the world.This paper introduces the basic concepts of virtual instrument,analysis how to makethe most effect for ...On the basis of the more and more use of the electric testing and in-formation processing technology in the world.This paper introduces the basic concepts of virtual instrument,analysis how to makethe most effect for gen-eral computer,discusses the principle and the characteristics of the hardware and the software for the USBsystem,which connect the PC and the test device.It also explains the working modelfor this kind of system by meansof an ex-ampleand the application methodsof somerelative software tools.展开更多
基金Supported by the Ministry of Education for Ph. D (20030614006)
文摘Virtual instrument is playing the important role in automatic test system. This paper introduces a composition of a virtual instrument automatic test system and takes the VXIbus based a test software platform which is developed by CAT lab of the UESTC as an example. Then a method to model this system based on Petri net is proposed. Through this method, we can analyze the test task scheduling to prevent the deadlock or resources conflict. At last, this paper analyzes the feasibility of this method.
文摘A simple,stable and reliable virtual logic analyzer is presented. The logic analyzer had two modules:one was the test pattern generation module,the other was the logic monitoring module. Combining the two modules,one is able to test a digital circuit automatically. The user interface of the logic analyzer was programmed with LabVIEW. Two Arduino UNO boards were used as the hardware targets to input and output the logic signals. The maximum pattern update rate was set to be 20 Hz. The maximum logic sampling rate was set to be 200 Hz. After twelve thousand cycles of exhaustive tests,the logic analyzer had a 100% accuracy. As a tutorial showing how to build virtual instruments with Arduino,the software detail is also explained in this article.
文摘为降低设备故障对模拟电子技术实验教学效率的影响,基于虚拟仪器技术设计了一种集成运放自动测试教学辅助平台。利用集成化虚拟仪器实验平台NI ELVIS II进行数据传输,设计了测试电路板卡;利用Lab-VIEW软件设计了仪器面板和平台软件部分。使用集成运放μA714芯片对平台进行了测试,并在模拟电子技术的实际教学中进行了效果验证。测试和实际使用结果表明,该平台可以准确检测出故障芯片,正确率>95%;相比于未使用本平台时,师生使用本平台进行实验的准确率提升超过20%,耗时降低超过20%。
文摘On the basis of the more and more use of the electric testing and in-formation processing technology in the world.This paper introduces the basic concepts of virtual instrument,analysis how to makethe most effect for gen-eral computer,discusses the principle and the characteristics of the hardware and the software for the USBsystem,which connect the PC and the test device.It also explains the working modelfor this kind of system by meansof an ex-ampleand the application methodsof somerelative software tools.
