Air-coupled Ultrasonic Testing - sonotec.eu · Air-coupled Ultrasonic Testing Advantages...
Transcript of Air-coupled Ultrasonic Testing - sonotec.eu · Air-coupled Ultrasonic Testing Advantages...
Air-coupled Ultrasonic Testing
Advantages
Air-coupled,contactless,couplant free
Inspection ofhighly attenuatingmaterials
High resolutiondue to the use offocusingtransducers
Applications
Interface detection
Bond inspectionand homogeneityanalysis
Delaminationtesting 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 onmetallic materials. In addition, there are often no established or at least no efficient testmethods for plastic and composite components, since their material- or production-dependentproperties often do not allow contact with liquid coupling agent or are at least highlydisadvantageous.This does not fundamentally exclude metallic materials for air-coupled ultrasonic testing, butclearly puts the focus on:
Plastic and composite components such as carbon or glass fiber reinforced plastics (CFRPand GFRP)
Honeycomb structures with different core and top layer materials
Rubber, foams, etc.
Ceramic and concrete materials
WoodTYPICAL FLAWS
Typical flaws include all types of volume defects such as delamination, in particular kissingbonds in the case of bonded materials, dry / non-wetted fibers, and cracks and inclusions of airor foreign matters. The advantage of air-coupled ultrasonic testing is that defects can not onlybe 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 smallererrors. The size of the defects that can be detected and the transmission capability differwidely and depend in particular on the material dimensions, the type of defect and theproperties of the material. A general statement cannot be made in most cases. In any case, itis important to carry out a preliminary examination or a feasibility study.
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Technical Data
General Data
19'' unit consisting of PC with Windows 8.1 and system softwareSONOSTUDIO; Digitizer 16 Bit, 100 MS/s; Transmitterunit; Receiver unit
Operating frequency 35 to 750 kHz (on the transmitter's side optional up to3 MHz)
Operating temperature 5 to 40°C
Network interface 1 GBit/s LAN
Protection class IP20
Standards DIN EN 601010, DIN EN 60204
Transmitter
Number of channels 1 - 4 channels (scalable)
Pulse height of the output signals Up to 400 V (optional up to 800 V)
Maximum power 2 kW (400 V), 4 kW (800 V)
CW operation Possible
Square wave burst transmitter Freely configurable (the pulse width can be selectedindividually for every square wave pulse of the burst)
Receiver
Number of channels 1 - 4 channels (scalable)
Gain 0 to 120 dB (0.5 dB increment)
Noise 1nV/√Hz
Scanner
Scanning area (X x Y x Z) 500 x 500 x 160 mm
Positioning accuracy 20 μm
Scanning increment Minimum 50 μm
Probes SONOSCAN CF series with robust stainless steelhousing
Frequency Range 50 kHz to 400 kHz
Relative sensitivity Up to -30 dB
Focusing Permanent focus with shaped lens or electronicallyadaptable 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 testingprocess
Repositioning of the measurement gates after the inspection
Individual signal processing algorithms (e.g. for filters)
Downloads
Type Title Size
SONOAIR Flyer 765 KB
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Manuel Lucas+49 (0)345 / 133 [email protected]