Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object

Industry

  • CPC
  • G01N29/00
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Sub Industries

G01N29/02Analysing fluids G01N29/022Fluid sensors based on micro-sensors G01N29/024by measuring propagation velocity or propagation time of acoustic waves G01N29/028by measuring mechanical or acoustic impedance G01N29/032by measuring attenuation of acoustic waves G01N29/036by measuring frequency or resonance of acoustic waves G01N29/04Analysing solids G01N29/041on the surface of the material G01N29/043in the interior G01N29/045by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks G01N29/046using the echo of particles imparting on a surface; using acoustic emission of particles G01N29/048Marking the faulty objects G01N29/06Visualisation of the interior G01N29/0609Display arrangements G01N29/0618synchronised with scanning G01N29/0627Cathode-ray tube displays G01N29/0636with permanent recording G01N29/0645Display representation or displayed parameters G01N29/0654Imaging G01N29/0663by acoustic holography G01N29/0672by acoustic tomography G01N29/0681by acoustic microscopy G01N29/069Defect imaging, localisation and sizing using G01N29/07by measuring propagation velocity or propagation time of acoustic waves G01N29/075by measuring or comparing phase angle G01N29/09by measuring mechanical or acoustic impedance G01N29/11by measuring attenuation of acoustic waves G01N29/12by measuring frequency or resonance of acoustic waves G01N29/14using acoustic emission techniques G01N29/22Details G01N29/221Arrangements for directing or focusing the acoustical waves G01N29/222Constructional or flow details for analysing fluids G01N29/223Supports, positioning or alignment in fixed situation G01N29/225Supports, positioning or alignment in moving situation G01N29/226Handheld or portable devices G01N29/227related to high pressure, tension or stress conditions G01N29/228related to high temperature conditions G01N29/24Probes G01N29/2406Electrostatic or capacitive probes G01N29/2412using the magnetostrictive properties of the material to be examined G01N29/2418using optoacoustic interaction with the material G01N29/2425optoacoustic fluid cells therefor G01N29/2431using other means for acoustic excitation G01N29/2437Piezoelectric probes G01N29/2443Quartz crystal probes G01N29/245Ceramic probes G01N29/2456Focusing probes G01N29/2462Probes with waveguides G01N29/2468Probes with delay lines G01N29/2475Embedded probes G01N29/2481Wireless probes G01N29/2487Directing probes G01N29/2493Wheel shaped probes G01N29/26Arrangements for orientation or scanning by relative movement of the head and the sensor G01N29/262by electronic orientation or focusing G01N29/265by moving the sensor relative to a stationary material G01N29/27by moving the material relative to a stationary sensor G01N29/275by moving both the sensor and the material G01N29/28providing acoustic coupling G01N29/30Arrangements for calibrating or comparing G01N29/32Arrangements for suppressing undesired influences G01N29/323compensating for pressure or tension variations G01N29/326compensating for temperature variations G01N29/34Generating the ultrasonic, sonic or infrasonic waves G01N29/341with time characteristics G01N29/343pulse waves G01N29/345continuous waves G01N29/346with amplitude characteristics G01N29/348with frequency characteristics G01N29/36Detecting the response signal G01N29/38by time filtering G01N29/40by amplitude filtering G01N29/42by frequency filtering or by tuning to resonant frequency G01N29/44Processing the detected response signal G01N29/4409by comparison G01N29/4418with a model G01N29/4427with stored values G01N29/4436with a reference signal G01N29/4445Classification of defects G01N29/4454Signal recognition G01N29/4463Signal correction G01N29/4472Mathematical theories or simulation G01N29/4481Neural networks G01N29/449Statistical methods not provided for in G01N29/4409 G01N29/46by spectral analysis G01N29/48by amplitude comparison G01N29/50using auto-correlation techniques or cross-correlation techniques G01N29/52using inversion methods other that spectral analysis

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