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This paper introduces a PCB test system based on the Virtual Instrument and Reconfigurable technology, which can quickly test and locate the circuit fault. The system involves the instruments based on PXI and GPIB, a testing signal generator based on reconfigurable CPLD, and fault diagnostic software based on database technique. The hardware and software of the system is reconfigurable, it can produce...
The progress of electronics and data processing contributed to the development of the measurement techniques of the virtual instruments. To contribute to this work one carried out an instrumental platform managed by Labview. The conceived measurement system is a multifunction. It ensures the measurement of the active, reactive and apparent power as well as the power-factor and the characterization...
Aiming at the online fault diagnoses of the power cable, an online Power Cable Monitoring system is built by using the virtual instrument platform Lab VIEW. In the system, the monitoring surface is designed by using the graphical programming language, and the data acquisition card PCI6221 is used to capture the data and to monitor the state of the online cable. The experiment shows that the functions...
In order to improve the efficiency of the Radar circuit maintenance, in this paper, based on PXI & GPIB Hybrid Bus and virtual instrument technology, a fault diagnosis platform for Radar circuit is developed, and also a fuzzy fault tree reasoning algorithm is presented. This platform is composed of two parts: hardware and software. The hardware consists of a built-in controller and 3 kind of virtual...
In this paper, we use virtual instruments (VI) and commercial off-the-shelf (COTS) technique to construct a portable general automatic test system (ATS). The system's function were realized by using PXI based modular architecture in its automatic test equipment (ATE). While its test program set (TPS) was compiled on the basis of the graphical development platform - LabVIEW8.2. By using powerful data...
The SVM technique has good generalization capability for small-sample cases of classification. In essence, fault diagnosis is just a kind of classification. When SVM is applied to the fault diagnosis for circuit, SVM needs to be improved. As a result, a method of Synthesized SVM (SSVM) is proposed in this paper. The SSVM includes PCA and combined SVM (CSVM) we design. PCA can eliminate a lot of irrelevant...
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