Virtual Instrument-based Railway Electric Point Machine And Series Motor Test System Development,

With the fast improvement of industry automation, a new generation of measuring and testing techniques is very needed by the complicated test-condition and test-task. The technique of virtual instrumentation, with the features of high extensibility, flexibility and short required development time, is originated from the combination of computer technology and instrumentation technology. A new technology based on the technology of computer-bus and technology of virtual instrument is widely applied in the field of test. Take the test of point machine and the motor as the background, the concrete application and realization of the virtual instrument technology of this test domain has been studied in this paper.The point machine is the electrical equipment used to change the direction of rail. Its reliability relates directly to the security of railway transportation. And the motor is the core part of point machine, its quality of operation is extremely important to the performance of point switcher. The traditional test system of point switch as well as the motor test system all has the shortcoming of be not convenient in measuring, unfriendly interface and so on, moreover they all cannot provide the real-time characteristic curves of the measured object, and also can not be able to offer comprehensive understanding of the object's overall performance to the people;But in this article, a new way based on the virtual instrument and the computer's formidable function has been discussed, and the test of point machine and motor have been realized with integration, miniaturization, intellectualization, and network .This article revolves in the design goal, in the brief narration virtual instrument technology foundation, and make the detailed introduction of the system from three aspects: the test system design, the hardware design and the software designed. The test system mainly composed of PC machine, the data acquisition card and the application software, we select the PCI-6014 multi-purpose card and Lab VIEWplatform of NI Corporation. After the realization of the system, we test the system with the multi-purpose point switch and motor simulation signal generator, and the measure- result indicated that the system has satisfied operation function, excellent precision, and undistorted output.