BSA Flow Software Installation and User's Guide - CSI

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5.15 Transform 5.15.1 Co-ordinate transformation of individual velocity samples The object Transform will perform a coordinate transformation of the measured velocity-components based on a transformation matrix provided by the user. The velocity-samples used must be coincident. Other data (position, analog inputs, particle diameter etc.) are passed through the Transform object unchanged. It is possible to apply more than one transform. For example, with 3D optics it may be practical to have a fundamental transform for the optical system, followed by one ore more transforms referring to the pan and tilt position of the optics. In this way, only the pan or tilt-related transform needs to be modified if the orientation of the optics is changed. With velocity channels in the same group, velocity samples are coincident. If the velocity channels are in separate groups, a Coincidence-object should be applied prior to the Transform object. Note It is possible to create the Transform-object as a direct child-object of a data-source object (BSA F/PApplication or Import Velocity file). This should only be attempted if you are sure that velocity-samples supplied by the data-source are indeed coincident, since coordinate transformation is otherwise impossible, and an error message will be generated. Normally co-ordinate transformation is used, when limited optical access or other physical restraints have forced velocities to be measured along directions not coinciding with the co-ordinate directions otherwise used in the model and in calculations. In such cases orthogonal velocity-components u, v and w can be calculated from “skew” components u1, u2 and u3 according to the matrix calculation: ⎡ u ⎤ ⎡C C C ⎢ ⎥ ⎢ ⎢ v ⎥ = ⎢C C C ⎢ ⎥ ⎢ ⎣⎢ w⎦⎥ ⎣⎢ C C C 11 12 13 21 22 23 31 32 33 ⎤ ⎡u 1 ⎤ ⎥ ⎢ ⎥ ⎥ ⎢u 2 ⎥ ⎥ ⎢ ⎥ ⎦⎥ ⎣⎢ u ⎦⎥ 3 By default velocity component u1 is assumed to come from the first processor channel, u2 from the second and u3 from the third. It will be assumed by default that LDA1 supplies u1, LDA2 supplies u2 and LDA3 supplies u3, but if necessary this can be changed editing the general properties of the transform object: 5-78 BSA Flow Software: Project explorer objects
Figure 5-71 General properties of the transform object. In the examples in Figure 5-71 there are two input channels. The property value None can be used if you wish to make coordinate transformation of 2dimensional velocity measurements. Finally the transformation matrix needs to be defined, using the Transform properties of the Transform object: ⇔ Figure 5-72 Defining the transformation matrix. ⎧C 11 C12 C 13 ⎫ ⎧ 1.000 0.000 0.000 ⎫ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎨C 21 C 22 C 23 ⎬ = ⎨ 0.000 1.000 0.000 ⎪ ⎬ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎪ ⎩ C 31 C 32 C 33 ⎭ ⎩ 0.000 1.732 -2.000 ⎪ ⎭ The example in Figure 5-72 corresponds to the geometry shown in Figure 5-73, where a 2D-probe connected to BSA2 and BSA1 measure the velocity components u1 and u2, while a 1D-probe connected to BSA3 measure the velocity component u3. BSA Flow Software: Project explorer objects 5-79
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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
Page 135 and 136: Uncheck the Use default bindings bo
Page 137 and 138: The calibration data are stored in
Page 139 and 140: 5.6.1 PDA beam system The Beam syst
Page 141 and 142: Figure 5-24: Fringe direction setti
Page 143 and 144: 5.6.4 Medium properties Medium name
Page 145 and 146: Software max. limit in mm.: Self ex
Page 147 and 148: The default address of the National
Page 149 and 150: Traverse coordinates of a datum poi
Page 151 and 152: 5.7.8 Traverse Mesh generator If yo
Page 153 and 154: Regions Figure 5-39 Motion pattern,
Page 155 and 156: Warning Please observe strict secur
Page 157 and 158: 5.9 Export Figure 5-40 Data-sources
Page 159 and 160: If multiple positions are exported
Page 161 and 162: 5.9.3 Selected columns 5.9.4 Binary
Page 163 and 164: Data C Headers Programming Examples
Page 165 and 166: char filename[256] = {0}; strcpy(fi
Page 167 and 168: Range means that the filter will ap
Page 169 and 170: 5.11.1 Data Properties Note that th
Page 171 and 172: Figure 5-54. Size histogram (left)
Page 173 and 174: Figure 5-57. Velocity distribution
Page 175 and 176: Figure 5-58 list output of 1D PDA d
Page 177 and 178: The next selection in the context m
Page 179 and 180: 5.13.2 Objects under Merge object A
Page 181 and 182: N−1 Mean u ∑ ηiui = i= 0 N−1
Page 183 and 184: Cross-moments The property Cross-mo
Page 185: The calculation of ε fails if Umea
Page 189 and 190: An alternative geometry of a 3D LDA
Page 191 and 192: Figure 5-75: FiberPDA phase plot. A
Page 193 and 194: 5.16.3 Display properties The defau
Page 195 and 196: The output quantities of the diamet
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
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Figure 6-42 Cyclic phenomena in the
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Cycle length The property Cycle len
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It allows to define the number of b
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Note It is not possible to have 0 a
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Figure 6-47: Output data from the c
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performed prior to phase sorting yo
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Figure 6-51 Properties of the spect
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Blocking Using the FFT-approach to
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1,2 1,0 0,8 0,6 0,4 0,2 Weight fact
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Output from the Spectrum object The
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6.4.2 Advanced Spectrum object Load
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To evaluate the new algorithm, comp
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6.4.3 Correlation object Conclusion
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20 16 12 8 4 0 0.0 0.2 0.4 0.6 0.8
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Time The first column of the output
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The Protocol Figure 6-67: Generic t
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How to Use the Initialisation Strin
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Figure 6-69: Traverse File option i
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Properties Output from MATLAB engin
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Result window Script Hides and disp
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6.6.2 Calculation object from to
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Tip To combine calculated data and
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max var. max of all arguments sum v
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6.7.3 Software set-up Once A/D-hard
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Figure 6-76 BSA F/P application win
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6.7.7 Analog input specifications J
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6.8.1 Installation 6.8.2 Hardware c
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Figure 6-85 BSA F/P application win
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6.9.1 Required hardware 6.9.2 Calib
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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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