BSA Flow Software Installation and User's Guide - CSI

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Stop on no. cycles The stop criterion "Stop on no. cycles" is performed on the number of cycles. Here it is possible to specify the maximum number of cycles to process. When the number of cycles is reached the application is requested to stop the acquisition. In case of high cycle frequency, the acquisition might aquire more cycles than requested before stopping. Stop on bin count The stop criterion "Stop on bin count" stops the acquisition when a defined number of samples are present in all bins. This criterion is used to specify that a minimum number of samples must exist in all averaging bins before stopping. In case of high sample rate, the acquisition might acquire more samples per bin than requested before stopping. Note Please note that multiple stop criteria can be made inside the same project: sample number, elapsed time, etc. The acquisition will stop based on the criterion met first. 6.3.5 Output from the Cyclic Phenomena Object The Cyclic phenomena object is a processing object identified by the - icon in the project explorer, and like all processing objects it performs calculations, but does not itself present the results. To see the results you can create a List-object as a child of the Cyclic phenomena object. (See Figure 6-47 to Figure 6-49) The output information will be different whether a SYNC signal is used (Time Based) or an Encoder with reset and encoder pulses is used (Encoder based). Note Please note that phase angles estimated from arrival times do not necessarily correspond to the angular position of a rotating shaft unless this shaft moves with constant velocity so there is absolute linearity between time and position. In some cases, such as a rotating impeller in a turbine, constant velocity is a reasonable assumption, but in other cases, such as the crankshaft in a four-stroke engine, the velocity can vary significantly within each cycle even if the duration of the cycle is constant. If knowledge of the angular position is important and linearity cannot be assumed, you should phase sort on the basis of encoder pulses rather than arrival time. Time based In Figure 6-47 and Figure 6-48 phase sorting has been done on the basis of arrival time, using SYNC1 to mark cycle resets. For Figure 6-47, the cycle has been divided into Time bin and for (Figure 6-48), the cycle length has been divided into angles bin (see chapter 6.3.4). See chapter 6.3.4 for selecting binning type. Time based information Time averaged information 6-48 BSA Flow Software: Options and Add-ons
Figure 6-47: Output data from the cyclic phenomena object with time binning type, SYNC input active Angle based information Angle averaged information Figure 6-48: Output data from the cyclic phenomena object with angle binning type, SYNC input active AT The Arrival Time shown here is relative to the beginning of the acquisition TT The Tansit Time shown is the measured transit time of each particle. Time The Time shown in Figure 6-47 is relative to the latest Reset-Pulse (SYNC) received, and consequently indicates the time within each cycle. The unit format for Time is the same as for Arrival time. It is defined from the menu bar in Tools/Option/Data formats. Angle In Figure 6-48, the time information is transformed into angle information. The measured duration of each cycle (time between two SYNCH events) is divided into angles according to the selected cycle length in deg (see chapter 6.3.4). By taking each individual cycle, cycle-to-cycle duration variation is taken into account. The Angle shown in Figure 6-48 is the angle calculated from the time information for each individual sample. Cycle No The Cycle number is the number of SYNCH events. Bin No A cycle is divided in a number of bins (see chapter 6.3.4). The bin No is the bin number that each sample belongs to. Raw Information The Figure 6-47 and Figure 6-48 correspond to a 1D LDA system. The LDA1 column is the velocity of the individual sample. In case of 2velocity components system or PDA system, all the raw individual information like second velocity or particle diameter will be available. Time or Angle Bin The column labelled Time or Angle Bin identify these bins by their upper limit. Counts The column labelled Counts contains the number of samples that fell in each bin, and is relevant in estimating the accuracy of the calculated mean- and RMS-values. If either of the angle bins contain too few samples to yield reliable mean- and RMS-values, you will have to increase the bin width by reducing the total number of bins. Please note that some bins may be empty: if an impeller blade blocks the laser beams, a measurement is not possible. BSA Flow Software:Options and Add-ons 6-49
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BSA Flow Software Version 4.10 Inst
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1. General 1.1 Table of Contents 1.
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5.5 Optical Calibrated LDA System p
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7.2.1 Basic principles of phase Dop
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1.2 Dantec Dynamics Licence Agreeme
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1.3 Laser safety All equipment usin
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2. Introduction Congratulations wit
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2.1.9 Analog Monitor Option 2.1.10
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2.3.4 Trouble shooting 2.3.5 On-lin
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3. Installation 3.1 General 3.1.1 P
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Directory structure CPU usage will
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3.2.2 Installation as administrator
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You have the possibility to define
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Click Next and select the add-ons y
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Peer-to-peer connection Processor s
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Click on the Download tab to get th
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The BSA processor will restart. Thi
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• If the Game controller needs to
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Figure 3-2 National Instruments Mea
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3.7 Third party traverse system To
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4. The user interface 4.1 Layout Me
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4. If the mouse pointer was in the
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4.3 Project explorer shortcuts to t
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Figure 4-5 Dialog for adding object
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Using Templates To make a Template,
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4.6 The tool bar Figure 4-6 the pro
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Save As... Figure 4-10 the File men
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Figure 4-11 Save As compressed proj
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Figure 4-14 the Properties - Summar
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Figure 4-18 The Select Position dia
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Options With the Options you get a
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When Enable error logging is checke
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The fourth format, Significant Digi
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The PDA Optical Configuration objec
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4.7.7 Help menu Figure 4-34 The Hel
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4.9 Message window • by clicking
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PM and Bragg cell connections Warni
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LDA and PDA transmitting optics The
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Click on OK. Note For fully opaque
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In the third step, the software con
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Lightweight Traverse with handbox C
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57G15 Traverse interface Third part
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• right-click the Traverse Server
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4. This brings up the following dia
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To change a setting, click in the V
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Figure 4-39 System monitor in auto-
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14. You have now completed data acq
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4. Check the Show System Monitor wh
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. 8. LDA 1 properties are specific
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11. To monitor the Doppler signals,
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The axes will automatically rescale
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Click Acquire. If a complete new re
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Define the positions that you want
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Select the type of the files to ope
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5. Project explorer objects 5.1 Sta
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Browse to the file you wish to impo
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For each column, the data type must
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5.3.1 Output properties Figure 5-4
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Figure 5-7 The Custom… dialog und
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Figure 5-8 BSA F/P 30: processor pr
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Max. acquisition time: The maximum
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Normal user interface Advanced user
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Figure 5-11 The Bragg cell connecto
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LDA 1, 2, . properties: Range and g
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5.3.4 System monitor It frequently
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Scope: Burst spectrum display Recor
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Overlaid Graphs: used to show the b
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Uncheck the Use default bindings bo
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The calibration data are stored in
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5.6.1 PDA beam system The Beam syst
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Figure 5-24: Fringe direction setti
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5.6.4 Medium properties Medium name
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Software max. limit in mm.: Self ex
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The default address of the National
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Traverse coordinates of a datum poi
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5.7.8 Traverse Mesh generator If yo
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Regions Figure 5-39 Motion pattern,
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Warning Please observe strict secur
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5.9 Export Figure 5-40 Data-sources
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If multiple positions are exported
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5.9.3 Selected columns 5.9.4 Binary
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Data C Headers Programming Examples
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char filename[256] = {0}; strcpy(fi
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Range means that the filter will ap
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5.11.1 Data Properties Note that th
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Figure 5-54. Size histogram (left)
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Figure 5-57. Velocity distribution
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Figure 5-58 list output of 1D PDA d
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The next selection in the context m
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5.13.2 Objects under Merge object A
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N−1 Mean u ∑ ηiui = i= 0 N−1
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Cross-moments The property Cross-mo
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The calculation of ε fails if Umea
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Figure 5-71 General properties of t
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An alternative geometry of a 3D LDA
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Figure 5-75: FiberPDA phase plot. A
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Page 197 and 198: 6. Options and Add-ons This chapter
Page 199 and 200: 6.1 Advanced Graphics Add-on The ma
Page 201 and 202: Figure 6-2 The Tools-Options-Output
Page 203 and 204: Figure 6-5 Scale properties for 2D
Page 205 and 206: Property group ‘Display’ Also t
Page 207 and 208: 6.1.3 2D Plot [m/s] 36 34 32 The 2D
Page 209 and 210: 6.1.4 2D Histogram For off-line use
Page 211 and 212: Configuring the 2D Histogram The co
Page 213 and 214: Configuring the 3D Plot Figure 6-21
Page 215 and 216: Figure 6-23 “Interpolate bin” s
Page 217 and 218: Property group ‘Data’ Figure 6-
Page 219 and 220: Coordinate shown on Intercepts the
Page 221 and 222: LDA1-Mean [m/ s] -2,00 -3,00 -4,00
Page 223 and 224: Figure 6-32 Properties of the Vecto
Page 225 and 226: Figure 6-33 shows a velocity vector
Page 227 and 228: 6.1.9 Exporting plots Copying a plo
Page 229 and 230: 6.2 Synchronisation Option 6.2.1 In
Page 231 and 232: Pin Signal Pin Signal 1 Out 1 14 Gr
Page 233 and 234: 6.2.5 Sync. Output Signals properti
Page 235 and 236: Outputs Figure 6-40 Differential sy
Page 237 and 238: Figure 6-42 Cyclic phenomena in the
Page 239 and 240: Cycle length The property Cycle len
Page 241 and 242: It allows to define the number of b
Page 243: Note It is not possible to have 0 a
Page 247 and 248: performed prior to phase sorting yo
Page 249 and 250: Figure 6-51 Properties of the spect
Page 251 and 252: Blocking Using the FFT-approach to
Page 253 and 254: 1,2 1,0 0,8 0,6 0,4 0,2 Weight fact
Page 255 and 256: Output from the Spectrum object The
Page 257 and 258: 6.4.2 Advanced Spectrum object Load
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Page 261 and 262: 6.4.3 Correlation object Conclusion
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Page 265 and 266: Time The first column of the output
Page 267 and 268: The Protocol Figure 6-67: Generic t
Page 269 and 270: How to Use the Initialisation Strin
Page 271 and 272: Figure 6-69: Traverse File option i
Page 273 and 274: Properties Output from MATLAB engin
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Page 277 and 278: 6.6.2 Calculation object from to
Page 279 and 280: Tip To combine calculated data and
Page 281 and 282: max var. max of all arguments sum v
Page 283 and 284: 6.7.3 Software set-up Once A/D-hard
Page 285 and 286: Figure 6-76 BSA F/P application win
Page 287 and 288: 6.7.7 Analog input specifications J
Page 289 and 290: 6.8.1 Installation 6.8.2 Hardware c
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2. Select Parameter Input 3. The fo
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B. Select Advanced Curve fitting an
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6.10 Mobile system Monitor option T
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7. Reference guide 7.1 Theory of La
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Doppler effect d0 R(z) Figure 7-1 L
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es e2 e1 U Figure 7-3 Scattering of
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Measuring volume proportional to pa
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Laser fI Beam splitter As indicated
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7.1.6 Frequency shift • Reduce th
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As long as the particle velocity do
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7.1.7 Signals The primary result of
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7.1.8 Seeding Seeding as flow field
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150 90 180 0 180 0 180 0 210 120 24
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7.2 Theory of Phase Doppler Anemome
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D is the particle diameter. βi is
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For reflection (Equation 7-16) The
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Figure 7-21: The effect of changing
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This is the principle of the spheri
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The trajectory effect The slit effe
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Figure 7-28:The DualPDA as a combin
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Figure 7-31: Reflection and refract
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Characteristic scattering angles At
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⎛ ϕ ⎞ ϕ2 = 4arcsin⎜ ⎟ −
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Figure 7-36: The critical angle con
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Using side scatter (reflected light
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Mask Front Lens Eye-piece Spatial f
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Alignment of the eyepiece The focus
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This is often not necessary in 1D a
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For both orientations of polarizati
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Figure 7-46. The effect of changing
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Table of characteristic angles Defi
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n rel ϕ c1 ϕ b0 ϕ c2 ϕ b2 ϕ r2
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Choice of wavelength Choice of mask
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Choice of wavelength and focal leng
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Choice of polarization Choice of sc
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Focal length Transmitter (FiberFlow
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Polarization ring Fixing screw Push
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Aperture plates The particle size r
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Tighten the cable securely at each
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Disconnect the receiving fiber V1 f
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Step by step procedure Phase-Dopple
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Lower half: The lower half of the b
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Recommended acceptance angles of th
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7.7.4 Air bubble in freon Character
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7.7.6 Bubble of air in diesel oil C
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7.7.8 Glass sphere in water Charact
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7.7.10 Latex sphere in water Charac
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Blocking increases calculation spee
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In this particular example we get:
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7.9 Moments (one-time statistics) 7
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1 = N Mean D mean ui (7-31) N ∑
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Software implementation Updating me
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u v 2 2 = = ∑ ∑ tU tV 2 2 − 2
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(histogram properties). ni is the n
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volume is calculated for the class
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D30 The volume mean diameter is cal
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Three further factors are however i
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d e ln 2 max 2 V do ∗ Vt = ( 7-48
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Diameter bins The number of diamete
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Trajectory dependent detection area
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Corrected particle Max d e ( Di ) C
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Integral time-scale τI Definition
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The mean values of u(t) and v(t) ar
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Low pass filtering & Step noise Obv
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fc ≡ t 1 2 ∆ If the true signal
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Estimator bias Estimator variance S
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-again S’(f) is used to distingui
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Zero padding Often the sampling per
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As an example the Hanning window is
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The Explorer window will now look s
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8.2.2 Peer-to-Peer Configuration Co
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. High Voltage or Figure 8-3: Calib
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Invalid particles in the corners Th
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Gaussain beam effect The following
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To check for connection, right-clic
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