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参数资料
| 型号： | VR001 |
| 厂商： | Mide Technology Corporation |
| 文件页数： | 9/15页 |
| 文件大小： | 0K |
| 描述： | VIBRATION DATA LOGGER |
| 产品培训模块： | Volture EHE004 Piezoelectric Energy Harvesting Conditioning Circuit |
| 特色产品： | Slam Stick? Vibration Recorder |
| 标准包装： | 1 |
| 系列： | Slam Stick™, Volture™ |
| 附件类型： | 振动特性鉴定设备 |
| 适用于相关产品： | Volture? 振动能量收集器 |
| 配用： | V25W-ND - PIEZOELECTRIC ENERGY HARVESTER V20W-ND - PIEZOELECTRIC ENERGY HARVESTER V21BL-ND - PIEZOELECTRIC ENERGY HARVESTER V21B-ND - PIEZOELECTRIC ENERGY HARVESTER V22BL-ND - PIEZOELECTRIC ENERGY HARVESTER V22B-ND - PIEZOELECTRIC ENERGY HARVESTER |
OPERATION
Figure 7: Z Frequency 2D
File
Edit View
Insert
Tools
Desktop Window
Help
ss_view('vib0000.dat', J:\data.dat
C:\stuff\> pvr2csv
2-D Frequency options
The 2-D Fourier graph splits frequency data into small
time ‘slices’ to visualize time-dependent trends in the
frequency data. By default, the full frequency range is
shown on the 2-D Fourier graphs, and the data are
segmented into 4 slices per second (this can be
adjusted by editing the script). Since the FFT
implementation requires each slice to be of equal
length, the data will be reshaped into equal-length
slices, and (if necessary) up to one slice of trailing data
will be discarded to maintain equal slice lengths.
The startfreq and endfreq parameters will constrain the
frequency range displayed, and the ceiling parameter
will constrain the maximum height (ceiling) of the plot
by cutting the tops off peaks above that value. For
example:
Command Window
100, 500);
will show only the frequency range between 100 and
500 Hz.
Unlike a 2-d plot, Matlab’s 3d surface plot cannot
ss_view('vib0000.dat', J:\data.dat 0.5);
C:\stuff\> pvr2csv
C:\stuff\> pvr2csv J:\data.dat
easily be zoomed or panned to show only a specific
region of interest. To more easily view a specific data
feature, optional parameters can be input to constrain
the contents of the 2-D Fourier graphs. The parameters
accepted are:
Command Window
ss_view('filename', startfreq,
endfreq, ceiling);
Command Window
100, 500,
will show the frequency range between 100 and 500
Hz, and also ceiling the amplitude to 0.5g so that small
features can be seen.
To provide a ceiling value without entering frequency
constraints, you can pass an empty string (two single
REVISION N0. 001
REVISION DATE: 08-24-2010
www.mide.com
9
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