BSA Flow Software Installation and User's Guide - CSI

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Sync 1 signal is used with cyclic events to mark the beginning of a cycle or revolution. Thus it should be generated once per cycle. The reset pulse from an angular encoder can be connected to this input. This signal is used in the Cyclic Phenomena add-on software to scale angle or phase information. Sync 2 signal can be used for encoder pulses. Each encoder pulse will be time-stamped. This information is not used in the software, but it can be exported and used to analyse e.g. fluctuations in the anguar speed. Trigger edge sync. 1: can take the values Positive or Negative. Determines whether the SYNC 1 input triggers on a positive going or negative going edge of a trigger pulse. Trigger edge sync. 2: see above Reset encoder: used for once-per-revolution encoder pulses Encoder: used for encoder pulses. This signal is connected to a counter, which is read when a Doppler burst is detected. The counter is reset whenever a “Reset encoder” pulse is received. The counter reading is used to relate the velocity measurements to the angular position of the encoder. In the Cyclic phenomena add-on, data can be sorted according to the angular position for plotting e.g. velocity vs. angle. The angular resolution is defined by the number of encoder pulses per revolution or per cycle. If the angular speed is constant, the Sync 1 signal combined with the BSA’s clock provide better angular resolution. Start measurement: trigger input, will start data acquisition and hence the BSA’s arrival time counter on the rising edge of a TTL pulse Stop measurement: trigger input, will stop data acquisition on the falling edge of a TTL pulse. Note The same TTL signal can be used to start and stop the measurement, if both Start measurement and Stop measurement are connected to it. 6.2.4 Synchronisation Outputs Burst detector enable: this can be used as a gate signal to enable measurements only during the time that this signal is high (TTL level). The difference between this input and the start/stop inputs is that start/stop starts and stops the arrival time counter, whereas the Burst detector enable just enables or disables detection of bursts, while the arrival time counter keeps counting. Reference clock mode: can be Internal or External. Default is Internal. If two or more BSA boxes are used together, one of them should have this property set to internal, and the BNC connector “10 MHz Ref Out” from this unit should be connected to the “10 MHz Ref In” on the other BSA(s), which should have this property set to External. These outputs are available on the “Programmable Output 1” (synchronisation outputs) , “Programmable Output 2” (Shutter output), and on the S1 connector, see Table 6-3 and Figure 6-36. The functions available are explained in section 6.2.5. 6-36 BSA Flow Software: Options and Add-ons
6.2.5 Sync. Output Signals properties 6.2.6 Checking for encoder pulses Figure 6-38 Synchronisation output properties for LDA processor (left) and PDA proecessor (right) Two types of TTL signals can be mapped to the connectors “Programmable Output 1” or “S1”: A Burst Detector signal from one of the velocity channels, or a Measurement Running signal. Note that for PDA processor, LDA channels are mounted on the slot 1, 4 and 5 of the processor for respectively one, two and three velocity componenets sytems. Extra channels are for future development. The Burst Detector signal is a TTL signal which is high for the duration of the burst. It is delayed by approx. 8 ms to the photo-multiplier signal. The Measurement running signal is a TTL signal which is high during acquisition. This can be used for gating external equipment during LDA data acquisition. The connector "Programmable Output 2" is called BNC 2(Shutter) in the software. It is used to control the shutter in PDA receiving optics (calibration). If an encoder is connected to the Sync. 1 or Sync. 2, open the System Monitor window. A bar graph will show the arrival rate of the Sync pulses: Sync 1 and Sync 2 pulse rate BSA Flow Software:Options and Add-ons 6-37
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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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Page 183 and 184: Cross-moments The property Cross-mo
Page 185 and 186: The calculation of ε fails if Umea
Page 187 and 188: Figure 5-71 General properties of t
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: Pin Signal Pin Signal 1 Out 1 14 Gr
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 and 244: Note It is not possible to have 0 a
Page 245 and 246: Figure 6-47: Output data from the c
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
Page 259 and 260: To evaluate the new algorithm, comp
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
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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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BSA Flow Software Installation and User's Guide - CSI

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