1、附录 2 外文翻译 Virtual-digital storage oscilloscope Virtual digital storage oscilloscope-the structure and composition： Virtual digital oscilloscope PXI bus from a multi-functional data acquisition card and the corresponding software. They will be installed on a PC running Windows, constitutes a powerful
2、 can store digital oscilloscope. Data Acquisition The design of NI is used by the companys multi-purpose data acquisitioncardPXI-6670E, its main functions are as follows: 64-way single-ended / 32-way differential analog input； 12 accuracy； 1.25 MSPS sampling speed； 1.25 MSPS disk write speed ； 0.05
3、10V input range； two-way 12 analog outputs； eight digital I/O.two-way 24 counter /timer. Functional equipment In this case virtual digital oscilloscope with real-time data acquisition, spectralanalysisand window treatment and filtering capabilities. In the virtual digital oscilloscope main panel on
4、data collection and analysis of the spectrum, and window processing, filtering and other function keys, according to the corresponding button we can enter into the appropriate sub-panel. Software Design and Implementation Virtual digital oscilloscope software design based on the use of C-language pr
5、ogramming environment LabWindows / CVI. LabWindows / CVI support numerical type, Boolean, and the string of text, and other data types, but the biggestadvantage is through dialog forms of interactive operations generate standard C code. In addition LabWindows / CVI provides a very rich debug tools,
6、including single-step, breakpoints, variable view, monitor window, and so on, these features make the adjustment process has become more vulnerable. The main function modules Virtual digital oscilloscope mainly by the software control signals the completion of the acquisition and display processing,
7、 data collection in the main panel to complete the following features: Setting up access, set up sampling frequency, set up a manner that waveform, data collection in the main panel to complete the following Features: Acquisition of real-time signal and the signal on its own spectrum analysis, see l
8、ines, and other functions, and window panels dealing with the acquisition of real-time signal and the signal to increase processing windows (including windows Haiming, Hamming window, Buiakean smoothing windows and window, etc.).Filtering in handling panel includes the following features: the acquis
9、ition of real-time signal and the signal on its own filtering treatment (including single-step filtering, multi-step filtering method and traditional methods, etc.) The source files generated when the control panel to complete the set, you can have a function of the code of procedure. Specific metho
10、ds for: to have completed the panel as a response to the current state of the Code menu, select Generate in the All Code, in the pop-up dialog function selected in the main panel and withdraw from the function , And the user interface will be able to produce documents relative to the framework of th
11、e code function. Add the code generated automatically step on the corresponding control is a function of the framework, to make certain controls to complete the function, we must add code to control the controls. One main () function is the entrance procedures, it is the function of initialization p
12、rocedures, loading the user and display panels, such as to complete other functions required to add code. Following the code for data acquisition functions, data acquisition process by calling the callback function buttonSHOU external acquisition. Software development environment: virtual digital os
13、cilloscope software design based on the use of C-language programming environment LabWindows / CVI. LabWindows / CVI support numerical type, Boolean, and the string of text, and other data types, but the biggest advantage is through dialog forms of interactive operations generate standard C code. In
14、 addition LabWindows / CVI provides a very rich debug tools, including single-step, breakpoints, variable view, monitor window, and so on, these features make the adjustment process has become more vulnerable. Have the function function with real-time display: Acquisition Acquisition signal to the i
15、nput signal and real-time display in a PC terminal. digital filtering: IIR filter on the use of digital signal processing and real-time filtering, at the same time filter can be set up in the best approximation function type, filter type, order, from top to bottom cut-off frequency, and other parame
16、ters. latest wave show: to meet the transient waveform display, but can also be transient waveform to be saved. waveform storage: at any time after the original signal or signals to the LVM LabVIEW unique file format stored on the local hard drive, for future analysis or processing. One transient si
17、gnal to the cut-off wave after BMP format images stored in local hard 上供 view and analysis of the future. significant wave back: to keep the memory of the LVM format waveform re-read the document and then displayed on a PC client. spectrum analysis: After the filter frequency signal respectively cor
18、responding analysis and response analysis of the frequency and wave at the same time to show real-time manner and form. Basic principles the use of hardware acquisition card acquisition signals, using software provided by NI DAQmx READ acquisition signals, and then through Waveform Graphs to conduct real-time display. This has a basic oscilloscope, signal showed that
