This paper adopts American National Instruments (NI) Company’s LabVIEW and LabVIEW RT virtual instrument softwareplatform and lots of things for this engine performance LabVIEW virtual instrument test system, such as...This paper adopts American National Instruments (NI) Company’s LabVIEW and LabVIEW RT virtual instrument softwareplatform and lots of things for this engine performance LabVIEW virtual instrument test system, such as the matched NI PCI dataCollection Card, NI SCXI signal-adjusting instrument and NI compact FieldPoint (cFP) distributed I/O real time system hardware.This system has realized multi performances’parallel test; and it can complete load, torsional moment, rotate speed, power, pressureand temperature’s real time monitoring automatically according to user’s setting; and finally through TCP/IP protocol it realizes testdata’s teleshare and telecontrol that user put on the test system. This system has such character as short development period, highuse efficiency and low cost, at the same time it has strong extensibility and reusability, so it has very high applied cost.展开更多
In order to achieve the auto-timing counts measurement of nuclear radiation using ORTEC 974 Counter/Timer, an auto-timing counts virtual instrument system based on the LabVIEW virtual instrument development platform a...In order to achieve the auto-timing counts measurement of nuclear radiation using ORTEC 974 Counter/Timer, an auto-timing counts virtual instrument system based on the LabVIEW virtual instrument development platform and GPIB instrument control and transmission bus protocol is designed in this paper. By introducing software timing technique, the minimum time base of factory setting improves from 0.1 s to 0.03 s. The timing counts performance and longtime stability are also discussed in detail. The automatic data recording and saving facilitates data analysis and processing. Its real-time display and statistic function is very convenient for monitoring the nuclear radiation.展开更多
The Shanghai Synchrotron Radiation Facility (SSRF) needs extremely precise power supplies for their various magnets. A digital controller is being developed for the power converters of the SSRF power supply (PS). In t...The Shanghai Synchrotron Radiation Facility (SSRF) needs extremely precise power supplies for their various magnets. A digital controller is being developed for the power converters of the SSRF power supply (PS). In the digital controller, a fully digital pulse-width modulator (PWM) directly controls the power unit insulated gate bipolar transistor (IGBT) of the PS. A program in LabVIEW language has been developed to control and monitor the digital PS via serial communication (RS232) from a PC and to modify its parameters as well. In this article, the software design of the virtual instrument for controlling and monitoring digitalized PS and its associated functions are described, and the essential elements of the program graphical main-VI and sub-VI source code are presented and explained. The com- munication protocol and the structure of the developed system are also included in this article.展开更多
A design of arbitrary waveform generator using NI PXI-5412 module(an arbitrary waveform generator)was provided in this paper,based on virtual instrument technology and LabVIEW.The generator can produce standard functi...A design of arbitrary waveform generator using NI PXI-5412 module(an arbitrary waveform generator)was provided in this paper,based on virtual instrument technology and LabVIEW.The generator can produce standard function waveforms,such as sine,triangle,square wave with adjustable amplitude and frequency.It can also produce arbitrary waveforms of different data files importing by Analog Waveform Generator Software.A heart electric waveform was set as an example of arbitrary waveform generation.It has practical value,because the standard functions and heart electric waveforms generated by the generator can be used in laboratories.展开更多
研究通过网络实现计算机远程控制和远程在线监测的方法 .利用虚拟仪器技术和网络通讯技术 ,使用TCP/IP通讯协议组和 L ab VIEW中通讯功能模块 ,在 L ab VIEW工具平台上用 G编程语言搭建计算机远程监控系统 .结合实例阐明了这种方法的可...研究通过网络实现计算机远程控制和远程在线监测的方法 .利用虚拟仪器技术和网络通讯技术 ,使用TCP/IP通讯协议组和 L ab VIEW中通讯功能模块 ,在 L ab VIEW工具平台上用 G编程语言搭建计算机远程监控系统 .结合实例阐明了这种方法的可行性及实用性强的特点 .应用该方法可方便地建立计算机远程在线监控系统 ,可充分利用已有的网络资源 ,虚拟仪器技术和 G语言编程使得系统变得灵活 。展开更多
文摘This paper adopts American National Instruments (NI) Company’s LabVIEW and LabVIEW RT virtual instrument softwareplatform and lots of things for this engine performance LabVIEW virtual instrument test system, such as the matched NI PCI dataCollection Card, NI SCXI signal-adjusting instrument and NI compact FieldPoint (cFP) distributed I/O real time system hardware.This system has realized multi performances’parallel test; and it can complete load, torsional moment, rotate speed, power, pressureand temperature’s real time monitoring automatically according to user’s setting; and finally through TCP/IP protocol it realizes testdata’s teleshare and telecontrol that user put on the test system. This system has such character as short development period, highuse efficiency and low cost, at the same time it has strong extensibility and reusability, so it has very high applied cost.
文摘In order to achieve the auto-timing counts measurement of nuclear radiation using ORTEC 974 Counter/Timer, an auto-timing counts virtual instrument system based on the LabVIEW virtual instrument development platform and GPIB instrument control and transmission bus protocol is designed in this paper. By introducing software timing technique, the minimum time base of factory setting improves from 0.1 s to 0.03 s. The timing counts performance and longtime stability are also discussed in detail. The automatic data recording and saving facilitates data analysis and processing. Its real-time display and statistic function is very convenient for monitoring the nuclear radiation.
文摘The Shanghai Synchrotron Radiation Facility (SSRF) needs extremely precise power supplies for their various magnets. A digital controller is being developed for the power converters of the SSRF power supply (PS). In the digital controller, a fully digital pulse-width modulator (PWM) directly controls the power unit insulated gate bipolar transistor (IGBT) of the PS. A program in LabVIEW language has been developed to control and monitor the digital PS via serial communication (RS232) from a PC and to modify its parameters as well. In this article, the software design of the virtual instrument for controlling and monitoring digitalized PS and its associated functions are described, and the essential elements of the program graphical main-VI and sub-VI source code are presented and explained. The com- munication protocol and the structure of the developed system are also included in this article.
基金supported by Research Project of "SUST Spring Bud"from Shandong University of Science and Technology(No.2008BWZ042)
文摘A design of arbitrary waveform generator using NI PXI-5412 module(an arbitrary waveform generator)was provided in this paper,based on virtual instrument technology and LabVIEW.The generator can produce standard function waveforms,such as sine,triangle,square wave with adjustable amplitude and frequency.It can also produce arbitrary waveforms of different data files importing by Analog Waveform Generator Software.A heart electric waveform was set as an example of arbitrary waveform generation.It has practical value,because the standard functions and heart electric waveforms generated by the generator can be used in laboratories.
文摘研究通过网络实现计算机远程控制和远程在线监测的方法 .利用虚拟仪器技术和网络通讯技术 ,使用TCP/IP通讯协议组和 L ab VIEW中通讯功能模块 ,在 L ab VIEW工具平台上用 G编程语言搭建计算机远程监控系统 .结合实例阐明了这种方法的可行性及实用性强的特点 .应用该方法可方便地建立计算机远程在线监控系统 ,可充分利用已有的网络资源 ,虚拟仪器技术和 G语言编程使得系统变得灵活 。
