BSA Flow Software Installation and User's Guide - CSI

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Methods to determine whether the LDA measuring volume is in position Note For all the below procedures, it is important to protect the photomultiplier tubes. Run the laser at low power and make sure that the PM current limit property of the processor has been correctly set.If the PM current saturates, reduce the PM high voltage. The main difficulty is normally to determine whether the measurement volume’s longest dimension is centered correctly. The below methods can be used for this. The pinhole/power meter method is good for determination of all three coordinates. Pinhole/power meter method A precise method is to mount a pinhole matched to the diameter of the measuring volume within the flow rig, and accurately measure its position relative to the laboratory origin. The LDA measuring volume must then be moved to the position where maximum light power from all beams pass through the pinhole. This method is highly repeatable, if a power meter is used to measure the power of the beams after the pinhole. Window surface/photomultiplier current method Another often used method is to use a window surface as the reference for the LDA measuring volume: if there is a window between the LDA optics and the flow, and the LDA measuring volume can be traversed to the window position, the detected Doppler signal from the wall or the PM anode current will reach a maximum, when the center of the measuring volume is at the surface of the window. Model surface/photomultiplier current method Similar to the window surface method, but if the surface is not transparent, stronger reflections occur, and it may be necessary to reduce the PM high voltage more. The automatic protection of the PM may further reduce the high voltage. In this case, reduce the laser power if possible until the PM current is below the allowed limit. 5.7.7 Saving traverse properties for use in other projects To ensure that new projects use the traverse properties that you have defined, it is necessary to perform the steps below. The template function supports the properties of the Lightweight, Lwhandbox and Generic traverse systems, but if you define new projects without aplying a template, the traverse properties will be the system default values. To save traverse settings in such a way that they are automatically used in future projects, you must right-click the traverse server icon and select Save... This opens a dialog in which you can rename the traverse server to any name that you wish, e.g. Lab Traverse. In the Dantec Device Configuration, select Custom Driver, and type in the name you gave the traverse: 5-42 BSA Flow Software: Project explorer objects
5.7.8 Traverse Mesh generator If you forget the name, you can search it in Windows Explorer in the \Dantec\Common folder, by looking for files with .cfg extension. Once you have redefined the traverse in the Dantec Device Configuration, the new settings will apply for all new projects. A traverse mesh generator can be opened by right-clicking in the Region list. This can quickly generate cartesian or cylindrical meshes with equidistant steps along each axis. The positions are generated in the order that gives the shortest travel, i.e. “meander” type movement as shown in the Traverse motion figure at the lower right hand corner of the Mesh Generator window. Figure 5-36 The mesh generator window, cartesisan mesh. Meshes can be generated externally and imported as ASCII files or via the clipboard. BSA Flow Software: Project explorer objects 5-43
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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
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 and 120: Figure 5-8 BSA F/P 30: processor pr
Page 121 and 122: Max. acquisition time: The maximum
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: Traverse coordinates of a datum poi
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 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
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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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