manual intensity

7/27/2019 Manual Intensity

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Manual Sound Intensity software Page 1 of 13

icroflown Technologies B.V.

Manual Sound Intensity

Microflown [email protected]

T: +31 316 581 490F: +31 316 581 491
mailto:[email protected]:[email protected]:[email protected]


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Microflown Technologies B.V.


Table of contents

1. Bill of materials ..................................................................................... 32. Setup of the system ............................................................................... 33. Intensity software ................................................................................. 5

3.1. Setup the software .......................................................................................... 53.2. Edit the settings .............................................................................................. 53.3. Calibrate the DAQ ............................................................................................ 63.4. Other Options ................................................................................................. 7

4. Measure the intensity ............................................................................ 94.1. Measure all the points ...................................................................................... 94.2. View the measurement data ........................................................................... 104.3. Make the 2D configuration grid ........................................................................ 114.4. Visualize the 2D colormap .............................................................................. 124.5. Write the report ............................................................................................ 13


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1. Bill of materials

Specified probe Signal conditioner Sound card amplifier Cables

o Lemo probe cableo 2 x BNC cables signal conditioner to sound card amplifiero USB sound card cable to computer

2 x 110/230 Volt to 18Volt adaptor + Adaptor cable

2. Setup of the system

Connect all electronics, according to next page.

Figure 1. Signal conditioner and sound card amplifier

Front view Rear view


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Figure 2. Front view schematics

Figure 3. Rear view schematics

Sound card amplifier

Power switch

USB. Connect it to thecomputer

Indication led is on whenthe sound card amplifier ispowered

Plug the 18 Volt adaptor here

Signal conditioner

Power switch

Switch gain high/low

Switch correction on/off

Indication led is on when the

signal conditioner is powered


Sound card amplifier

BNC pressure input.

Connect it to thepressure input of thesignal conditioner

BNC velocity input.

Connect it to thevelocity input of thesignal conditioner

BNC speaker.

Connect it to the speaker

Record incidation led.

When it flashes thesound card is busy

Turn this knob to vary

the speaker volume

Signal conditioner

Connection the Lemo cable

Indication leds: correction on/off

BNC velocity output.Connect it to the velocity inputof the sound card amplifier

BNC pressure output.Connect it to the pressure input

of the sound card amplifier

Overload indicationpressure channel

Overload indicationvelocity channel

Indication led: Low/High gain


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3. Intensity software

3.1. Setup the so ftwareRun the executable Setup Microflown Intensity V1.1.exe, only for Windows XP.Follow the set-up procedure installing the Matlab Runtime version necessary for running the

software.

Run the Microflown programMICROFLOWN INTENSITY 1.1

Figure 4A. Main window

3.2. Edit the sett ings

Open Edit Settings

Figure 4B. Setting window

AcquisitionSettings

1. Globalsettings

2. Calibrationcoefficient

CalibrationCurve

Calibrate DAQ

StartMeasurement


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1. Global settings:Enter the path for saving the measurements and project filesIn the folder Measuremens the different sessions are divided into subfolder named bydate.

2. Calibration coefficientEnter the coefficient values for the calibration curves as in the calibration reportSome calibration settings are described as inf. (infinitive) in the calibration report. -example Cu3= inf.

Be sure user will set a high value of hertz, for example > 5000 hz.

3. Acquisition settingsEnter the sample rate and select the Correct ID, not the internal audio card.If correct ID is set, youll get correct calibration view, and not a 1 curved lin

Note: You can check if the right ID is selected by de-connect the P-output or U-output cable,so one of the signals will become a straight line. If the signal lines will stay the same the

wrong audio soundcard is selected

3.3. Calibrate the DAQ

SelectCalibrate DAQ from the main window (Fig.4A)The new soundcards models have the button for the calibration. Press this button when

starting the calibration procedure.If the soundcard has not the calibration button connect a know input signal in the BNCpressure and velocity input.

Figure 5. Calibration window and new soundcard

New Sound card amplifier

Power switch

USB. Connect it to thecomputer

Indication led is on whenthe sound card amplifier ispowered


Calibration button

Set the input voltage


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Select edit calibration voltage

Enter the right input value for the calibration of the daq (default 0.096Volt Peak).

3.4. Other Optio ns

To manually change the input and output volume of the DAQ (Fig.6):EditVolume control

Figure 6. Settings for input and output Volume Level

Input level Output level


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Note:

- Display different functions in the graph plot:All the curve displayed in each graph can be changed by selection. When Righ-clickon thediagram the cascade window show the different plotting options:

Option for plotting:

Right click onThe window


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4. Measure the intensity

4.1. Measure all the po ints

Choose a grid for the point by point intensity measurement.Position the probe in the first point and click Start. Check the overload Level in the window.

Figure 7. Measurement window

Move the probe in the second point of measurement and press Start.

Measure all the points chosen for the test.NOTE: Hold the probe from the bottom with the measurement direction normal to the surface.The mark on the probe has to be positioned in front of the measurement surface.

StartMeasurement

Mark fordirection ofmeasurement

Hold the probefrom thebottom


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4.2. View the measurement data

Switch the tab from Measure to Single File

Load the measurement data using the Icon open recording file.

Figure 8. Single file visualization

It is possible to play back the velocity and pressure signal for listening.

Playback themeasurement

Open File

Time HistoryP-U

WeightingOption


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4.3. Make the 2D con f igurat ion grid

Switch the tab from Single File to 2D configuration.

1. Set the Width and Height number of points and the distance between the points fromthe Grid Config Window.

Figure 9. Configuration window

2. Choose the weighting type and press the button Use config. It is possible to apply the1/3 octave frequency band for calculation.

3. Take a picture of the test setting and load this image using the button load backgroundimage.

4. Load the measurement files using the button Load multiple files.Note: Follow always these four steps in order.

Grid config

Load Image

Load Data


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4.4. Visualize the 2D co lormap

Switch the tab from 2D configuration to 2D colormap.

1. Set the frequency band and dynamic range to visualize the measurement.It is possible to display velocity, pressure, intensity and reactive intensity.Click the buttonAR to autorange the colormap range.

2. Move the colormap to fit the Photo of the test moving using the stretch and positionfunctions in the controls window.

3. Save the project of the measurement.4. Use the icon Make a report to create a report of the measurement

Figure 10. 2D colormap visualization

Note: It is possible to change the colorbar from:

Option Colormap

Controls forColormapvisualization

Save projectMake report Auto range

function


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4.5. Write the repo rt

Switch the tab from 2D colormap to 2D report/export.

Figure 11. Edit the report

It is possible to export in excel or txt format the measurement data.Edit the text in the report of the test.

Export Option

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