Ultrasound measurement

A GUI porgram sonicPy is used for the ultrasound measurement. SonicPy allows to automatically record ultrasound ultrasound waveforms from the oscilloscope with varying exitation wave frequencies.

Before beginning, create a folder named US in your data folder where the ultrasound data will be saved to.

  1. Open sonicPy by running the ultrasound measurement shortcut of the desktop.

    ultrasound_measurement_start_screen

    Important

    Check that the Scope-Instrument is DPO5104 and AFG-Instrument is AFG3251. If something else is displayed it means that the program could not communicate with the hardware. Check that the oscilloscope and the function generator are both powered on.

  2. Check and update if needed the following settings values:

    Scope settings

    Settings

    Value

    Data source

    CH1

    Vertical scale

    ~1

    Acquisition type

    avarage

    N-average

    1000-4000

    Autostop

    On

    AFG settings

    Settings

    Value

    Function

    user1

    Amplitude

    5

    Operating mode

    burst n-cycles

    N-cycles

    1

    Output

    On

    Auto-upload waveform

    On

    Scan settings

    Settings

    Value

    Start

    14

    End

    60

    #Pts

    24

    Save data settings

    Settings

    Value

    File system

    file system path to the US data folder which you created

    Subdirectory

    P-T condition (eg. “1000psi” or “2000psi_500watt”)

  3. To check the ultrasound signal level, clear the scope and acquire a new ultrasound waveform by clicking Erase + ON above the waveform plot.

    waveform_acquired

    Note

    Scope Vertical scale may need to be adjusted depending on the signal level to avoid saturation and to optimize the oscilloscope’s dynamic range relative to the signal level.

  4. Set the ‘Next file #’ zero, if needed; and click Go in the Scan panel. The the frequency sweep will start and conclude on its own. To interrupt the scan mid-way click Go again.

    Important

    Remember to reset Next file # back to 0 before each scan.