Air-coupled Ultrasonic Testing

[Translate to English:] SONOAIR Scan einer CFK Platte mit Fräsung[Translate to English:] SONOAIR Phased-Array Luftultraschallprüfung - 100% berührungslos[Translate to English:] SONOAIR Transmissionsmessung GFK und Kunststoff[Translate to English:] SONOAIR Transmissionsmessung einer Wabenstruktur[Translate to English:] SONOAIR Mehr-Element Prüfkopf SONOSCAN CF400 3E[Translate to English:] SONOAIR C-Scan Butterbrotpapier
[Translate to English:] SONOAIR Scan einer CFK Platte mit Fräsung[Translate to English:] SONOAIR Phased-Array Luftultraschallprüfung - 100% berührungslos[Translate to English:] SONOAIR Transmissionsmessung GFK und Kunststoff[Translate to English:] SONOAIR Transmissionsmessung einer Wabenstruktur[Translate to English:] SONOAIR Mehr-Element Prüfkopf SONOSCAN CF400 3E[Translate to English:] SONOAIR C-Scan Butterbrotpapier

Advantages

  • Air-coupled, contactless, couplant free
  • Inspection of highly attenuating materials
  • High resolution due to the use of focusing transducers

Applications

  • Interface detection
  • Bond inspection and homogeneity analysis
  • Delamination testing etc.

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Ai-coupled UT - Contact-free Testing of Composites

Due to the smaller impedance differences to the air, air-coupled ultrasonic testing works, physically and practically, in most cases better on plastic and composite components than on metallic materials. In addition, there are often no established or at least no efficient test methods for plastic and composite components, since their material- or production-dependent properties often do not allow contact with liquid coupling agent or are at least highly disadvantageous.
This does not fundamentally exclude metallic materials for air-coupled ultrasonic testing, but clearly puts the focus on:

  • Plastic and composite components such as carbon or glass fiber reinforced plastics (CFRP and GFRP)
  • Honeycomb structures with different core and top layer materials
  • Rubber, foams, etc.
  • Ceramic and concrete materials
  • Wood

Typical flaws

Typical flaws include all types of volume defects such as delamination, in particular kissing bonds in the case of bonded materials, dry / non-wetted fibers, and cracks and inclusions of air or foreign matters. The advantage of air-coupled ultrasonic testing is that defects can not only be detected, but in some cases a certain degree of the error can be determined.

The smallest detectable flaw size is currently around 1.00 mm for isolated individual errors. However, previous investigations have already succeeded in finding significantly smaller errors. The size of the defects that can be detected and the transmission capability differ widely and depend in particular on the material dimensions, the type of defect and the properties of the material. A general statement cannot be made in most cases. In any case, it is important to carry out a preliminary examination or a feasibility study.

Video

Technical Data

General Data
19'' unit consisting ofPC with Windows 8.1 and system software SONOSTUDIO; Digitizer 16 Bit, 100 MS/s; Transmitter unit; Receiver unit
Operating frequency35 to 750 kHz (on the transmitter's side optional up to 3 MHz)
Operating temperature5 to 40°C
Network interface1 GBit/s LAN
Protection classIP20
StandardsDIN EN 601010, DIN EN 60204
Transmitter
Number of channels1 - 4 channels (scalable)
Pulse height of the output signalsUp to 400 V (optional up to 800 V)
Maximum power2 kW (400 V), 4 kW (800 V)
CW operationPossible
Square wave burst transmitterFreely configurable (the pulse width can be selected individually for every square wave pulse of the burst)
Receiver
Number of channels1 - 4 channels (scalable)
Gain 0 to 120 dB (0.5 dB increment)
Noise1nV/√Hz
Scanner
Scanning area (X x Y x Z)500 x 500 x 160 mm
Positioning accuracy20 μm
Scanning incrementMinimum 50 μm
ProbesSONOSCAN CF series with robust stainless steel housing
Frequency Range50 kHz to 400 kHz
Relative sensitivityUp to -30 dB
FocusingPermanent focus with shaped lens or electronically adaptable focus with multi channel Fresnel zone design

Software

  • Display of the measurement results as A-, B-, C- or D-Scan
  • Storage of the complete A-scans for every measurement point during the testing process
  • Repositioning of the measurement gates after the inspection
  • Individual signal processing algorithms (e.g. for filters)

Downloads

TypeTitleSize
SONOAIR Flyer765 KB

Do you have any questions?

Manuel Lucas

Please contact us! We will be glad to help you.

Manuel Lucas

+49 (0)345 / 133 17-846
manuel.lucas@sonotec.de
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