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Wysłany: Pon 10:31, 29 Lis 2010
Temat postu: ugg boots sale Automatic Test System _3124 harmoni
Automatic test system harmonic
Received 13 pieces, mainly through GPIB GPIB interfaces to achieve its functions supporting software commonly known as GPIB-PC, the GPIB-PC support, you can use 20 kinds of high-level language called assembly language written by the GPIB-in procedures, preparation of GPIB control procedures. In the preparation process, attention should be controlled by different instruments to represent different strings, pay attention to the initial state and executing statements of the time. To make information analysis and processing flexibility, data acquisition software to make the following settings: Set the number of sampling channels; set acquisition speed access GPII ~ Lotus connector bus reliability and acquisition time; set the data file storage. Harmonic analysis software,
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, mainly from the time domain, frequency domain both voltage and current harmonic analysis. Software can be completed the following main functions: (1) draw the waveform to calculate the amplitude at any time. (2) the use of fast Fourier transform (FFT) method of analysis of waveforms in the frequency domain,
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, through the A / D samples can be calculated is the value of the first harmonic voltage and harmonic current content ratio (HRUn, HRb;); the first time harmonic voltage and harmonic current value of the (Un,,, 1); harmonic voltage and current total content (,,); voltage and current total harmonic distortion (THDu, THDi). The first \with rate HRIn is:: 100% lf where Si - Part r'1 harmonic current (rms', 1 - Fundamental Current (RMS) total content of harmonic voltage Un is:: fJfJn2n = type selected given the total harmonic current harmonic content, as,: √ J a j-type in - a number of selected harmonic voltage total harmonic distortion for the 6kv H Gong J Xu voltage into the snakehead!-i? ≮ j ± m: = ',
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, ii;, into the possession of snakehead power (as opposed to wall cars'-:,! 』【A-phase current _I-, well refuse electric car wins (c Phase One:: h ... r - ~ | 'h-Line Electric Soft 【c root, ~,; l, - a preparation, \Because the system sampling frequency high frequency cycles of sampling up to 5] 2 points, so high precision FFT, the error is less than l%. software process indiscriminately see indiscriminately 3. What started documentation to complete Shi wrecker mounted port , the device you matrix. Check the tape drive failures with zero speed roll set set. recorded position 1 Shu scheduled recording channels 1d code set = b [== j hear when the set has been recorded with a welcome spreading. playback ld code to set the number of channels position to set the number of sampling frequency, anti-acyl-shaped stretch to ask the number of mining deposits relentless l Lan Wen Bian Lan Kwai limonene I. ....-...... 1 ....... son of a fox called c language graphics 7 # The second] twenty-two tone J1] C, then made to the procedures of twenty-two =] [II IJ first two dozen cloud-shaped quilting and obituary wide analysis of Figure 3 more pieces of software features glistening Cheng Gu strong as in the drawing harmonic wave When families can be selected just buckle India waveform channels, start and end time, zoom in and out of proportion. Wang Sheng Wen-powered car '1 spit control of a Health and soap. jqL chu current Qu Bo Tong circle the 4 based system processing of a mine shaft twisted _: rf_ Zhu stretch of heavy run-time power, 6kV-what into the line voltage and current waveform of Figure l; Table 1 as part of harmonic voltage and current values of rI count. Table , I t are wave 6kV moth into the wild cattle population 6kVi color line current Park students help cut the number of ItV1} f \Maya calculating the number of the world to be set according to = 11.98V, THD! Il1_ 【t26% (~ 7 times j = 9.9339A.THDi = 3.n4J2 ~ times J V. Conclusions proved the high accuracy of the system. data analysis Jie accurate, low cost, flexible Ⅱ 』Hom. With the development of science and technology, many instruments with Ding throw any computer through a standard connection l = _I, so the development of dynamic testing technology, has become an inevitable trend. automated testing is not only fast sulfur standard. and the day to facilitate analysis and processing measurement results in many laboratories already have established the basic conditions for automatic test system should be fully deleted profit, hair {equipment effectiveness,
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