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PA UT (PAUT): Honeycomb

Inspection of the honeycomb parts for the debonding, breaks, insufficient quality of plies of the bonding material and other structural defects is performed by the ISONIC 3510, ISONIC 2010, and ISONIC 2009 UPA Scope instruments with use of the linear array probes equipped with the linear array probes. The standard 0-deg linear scan (B-Scan) mode combined with the non-linear acoustic based signal processing provides the cross-sectional coverage and clear imaging for the entire thickness of the material. The line scanning either encoded or time-based provide the volume coverage along the scanning line within entire width of the PA probe



The following features are provided:
  • Scanning Pattern (Scan Plan) Design
  • Intuitive Image Guided PA Pulser Receiver with Beam Forming View
  • True-To-Geometry 0-deg Cross-Sectional Coverage of the material and line scanning along the part either encoded or time based
  • "On-the-fly" True-To-Geometry Material Overlay Volume Corrected Imaging:
    • Cross Sectional Slices
    • Top (C-Scan) View
    • Side View
    • End View
    • 3D View
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  • DAC / TCG Data / Image Normalization
  • Independent on TCG Angle Gain Per Focal Law Correction
  • 100% Raw Data Capturing
  • Automatic Defects Alarming Upon C-Scan Acquisition Completed
  • Automatic Creation of Editable Defects List
  • Comprehensive Postrpocessing Toolkit Including:
    • Recovery and Evaluation of the Captured A-Scans from the Recorded Cross Sectional Views and C-Scans
    • Recovery of the Cross Sectional Views from the Recorded C-Scans
    • Converting Recorded C-Scans or their Segments into 3D Images
    • Off-Line Gain Manipulation
    • Off-Line DAC Normalization of the Recorded Images / DAC Evaluation
    • Numerous Filtering / Reject Options ( by Geometry / Position / By Amplitude db-toDAC / etc ) and Regeneration of the Corresponding of Editable Defects List and Storing it into a Separate FIle
    • Defects Sizing
    • Automatic creating of inspection reports - hard copy / PDF File

PDF Brochure

The videos below illustrates detection of some macro-defects in the honeycomb panels with the metallic (parallel sides) and composite (CFRP, non-parallel sides) skin correspondingly using ISONIC 3510 instrument





Another vide shows checking bonding of the FRP plate to honeycomb panel with the use of ISONIC 3510 unit



For the detection of the imperfections in the fine structure of honeycomb panels the quality grades of the material may not be distinguished surely based on the traditional pulse echo technique as the deviation between the typical parameters (amplitude, time of flight) of ultrasonic signals such as, for example, back wall echo, is not sufficient

The solution for the said problem ISONIC 3510, ISONIC 2010, and ISONIC 2009 UPA Scope instruments is based on the frequency domain signal analysis being the standard feature of both the PA and conventional modality functioning of the said equipment

Whilst running the instrument in the PA modality the FFT function is applicable to every focal law’s A-Scan obtained at the calibration, inspection, and evaluation stage bringing the speed and reliability of the material characterization to the significantly higher level: for every frequency domain graph (FFT graph) the signal’s center frequency and bandpass at the desired level are determined automatically and the corresponding mapping and real time imaging is available

The video below illustrates the inspection of honeycomb panel with composite skin when the FFT is applied to the back wall echo and the FD B-Scan (Frequency Doman B-Scan) image is formed for the entire PA probe coverage providing very clear pitch-size-resolution distinguishing between the different quality areas while the regular B-Scan imaging doesn’t allow the same rapidness and simplicity of interpretation



At last the video below illustrates very clear and rapid detection of the areas of the aluminum skin de-bonded from honeycomb with use of FD B-Scan imaging



Note: In order to accelerate the data stream the videos above are linked to the Youtube. In case the YouTube may not be accessed from your location please use the links below


DOWNLOAD AND PLAYBACK THE EXEMPLARY INSTRUMENTS FILES

The archive comprices some Exemplary Instrument Files for this application

The files should be extracted from the archive and played in the regular PC running under Win'XP, 7, 8, 10 with use of the freely distributable ISONIC PA Office software package