BSA Flow Software Installation and User's Guide - CSI

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Group properties: acquisition and monitor Dead Time can used to avoid over-sampling the velocity information, and thereby eliminate velocity bias. It is typically used when the required result is the moments of the velocity distribution (mean, RMS, skewness and flatness). It has the additional advantage of reducing the data file size, compared to the other modes. Please consult chapter 8 for more information on how to use the different modes. Burst is used when the photo-detector signal consists of discrete bursts from seeding particles, and when a high data rate is required. There is one measurement per detected burst, producing arrival time, transit time and velocity information. In Dead time mode, the time axis is divided into intervals. In each interval, only the first Doppler burst is processed. The interval is specified in the Dead-time property. Figure 5-10 Processor properties window in Dead Time mode for BSA F/P 30 and BSA F/P 60-80 in Normal user interface mode. Click on the Group icon in the BSA Application window to see the usercontrollable group properties in the property editor. Coincident data from velocity channels are obtained by placing those channels in a common group. The group properties are common for all channels in that group. If coincident data are not required, the channels can be placed in separate groups. It is possible to perform subsequent coincidence filtering of data from separate groups by adding a Coincidence object to a project, see section 5.8 - Coincidence. Max. samples The maximum samples number is a stop criterion for data acquisition for the selected coincidence group. 5-12 BSA Flow Software: Project explorer objects
Max. acquisition time: The maximum acquisition time is a stop criterion for data acquisition for the selected coincidence group. Acquisition stops when one of the two criteria is fulfilled. Note: it is possible to have other stop criteria defined in a Moments object – please see section 5.14.4. LDA 1, 2, .. properties: Range and gain Click on the LDA1,2,3 icon in the BSA Application window to see the user-controllable LDA properties in the property editor. Center velocity The center velocity is used to set the center of the required velocity range. It should be set according to the estimated mean velocity in the flow. You can type a value or select one from the list. If you type a value, the software will select the nearest possible value of the processor. The unit can be m/s, ft/s or ft/min. This, and the format of the figures, is specified from the Tools - Options – Data formats menu. Under the list of data types, a check box Display velocity as frequency must be checked if the Doppler frequency should be shown instead of velocity. Velocity span The velocity span is the width of the velocity range around the center velocity. Units are the same as for the center velocity. Velocity span should be set according to the expected range of fluctuations in flow velocity. If in doubt, set a large velocity span to begin width, define a histogram and make an acquisition. Zoom in to proper center velocity and velocity span afterwards. Note Rules for 2D or 3D coincidence measurements: PDA 1, 2 properties: Range and gain ratio between the velocity span of the channels: max. 2, ratio between the Max. record length of the channels: max. 2 If these rules are not respected, delays in the electronics will differ too much to obtain reliable coincidence results Click on the PDA2,3,4 icon in the BSA Application window to see the user-controllable PDA properties in the property editor. BSA Flow Software: Project explorer objects 5-13
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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
Page 69 and 70: 4.7.7 Help menu Figure 4-34 The Hel
Page 71 and 72: 4.9 Message window • by clicking
Page 73 and 74: PM and Bragg cell connections Warni
Page 75 and 76: LDA and PDA transmitting optics The
Page 77 and 78: Click on OK. Note For fully opaque
Page 79 and 80: In the third step, the software con
Page 81 and 82: Lightweight Traverse with handbox C
Page 83 and 84: 57G15 Traverse interface Third part
Page 85 and 86: • right-click the Traverse Server
Page 87 and 88: 4. This brings up the following dia
Page 89 and 90: To change a setting, click in the V
Page 91 and 92: Figure 4-39 System monitor in auto-
Page 93 and 94: 14. You have now completed data acq
Page 95 and 96: 4. Check the Show System Monitor wh
Page 97 and 98: . 8. LDA 1 properties are specific
Page 99 and 100: 11. To monitor the Doppler signals,
Page 101 and 102: The axes will automatically rescale
Page 103 and 104: Click Acquire. If a complete new re
Page 105 and 106: Define the positions that you want
Page 107 and 108: Select the type of the files to ope
Page 109 and 110: 5. Project explorer objects 5.1 Sta
Page 111 and 112: Browse to the file you wish to impo
Page 113 and 114: For each column, the data type must
Page 115 and 116: 5.3.1 Output properties Figure 5-4
Page 117 and 118: Figure 5-7 The Custom… dialog und
Page 119: Figure 5-8 BSA F/P 30: processor pr
Page 123 and 124: Normal user interface Advanced user
Page 125 and 126: Figure 5-11 The Bragg cell connecto
Page 127 and 128: LDA 1, 2, . properties: Range and g
Page 129 and 130: 5.3.4 System monitor It frequently
Page 131 and 132: Scope: Burst spectrum display Recor
Page 133 and 134: 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
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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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5.16.3 Display properties The defau
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The output quantities of the diamet
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6. Options and Add-ons This chapter
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6.1 Advanced Graphics Add-on The ma
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Figure 6-2 The Tools-Options-Output
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Figure 6-5 Scale properties for 2D
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Property group ‘Display’ Also t
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6.1.3 2D Plot [m/s] 36 34 32 The 2D
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6.1.4 2D Histogram For off-line use
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Configuring the 2D Histogram The co
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Configuring the 3D Plot Figure 6-21
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Figure 6-23 “Interpolate bin” s
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Property group ‘Data’ Figure 6-
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Coordinate shown on Intercepts the
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LDA1-Mean [m/ s] -2,00 -3,00 -4,00
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Figure 6-32 Properties of the Vecto
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Figure 6-33 shows a velocity vector
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6.1.9 Exporting plots Copying a plo
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6.2 Synchronisation Option 6.2.1 In
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Pin Signal Pin Signal 1 Out 1 14 Gr
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6.2.5 Sync. Output Signals properti
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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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BSA Flow Software Installation and User's Guide - CSI

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