| Patents for G01H 9 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means (3,383) |
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| 07/29/1999 | WO1999038048A1 Fiber optic sensor system and method |
| 07/29/1999 | WO1999038017A1 An optical accelerometer |
| 07/27/1999 | US5930203 Fiber Optic hydrophone array |
| 07/20/1999 | US5926591 Optomechanical acceleration sensor |
| 07/01/1999 | WO1999032849A1 System and method for laser ultrasonic bond integrity evaluation |
| 06/17/1999 | DE19826565A1 Optischer Schallsensor, insbesondere Mikrofon Optical sound sensor, in particular microphone |
| 06/16/1999 | EP0922950A2 Method for determining unbalance and device for measuring unbalance |
| 06/15/1999 | US5913260 System and method for detecting deformation of a membrane |
| 06/10/1999 | WO1999029139A2 Optical acoustic sensor, especially a microphone, with an addtional reflection device |
| 06/10/1999 | WO1999028713A1 Interferometric sensing apparatus |
| 06/09/1999 | CN1043588C Method for determining optical fiber vibration monit sensor beat frequency |
| 06/08/1999 | US5910855 For the modulation of a light beam |
| 06/01/1999 | US5909279 Ultrasonic sensor using short coherence length optical source, and operating method |
| 05/20/1999 | WO1999024790A1 Improved array topologies for implementing serial fiber bragg grating interferometer arrays |
| 05/04/1999 | US5900935 Method for detecting sonic vibrations in a test material |
| 04/29/1999 | WO1999021394A1 Method of detecting atmospheric weather conditions |
| 04/29/1999 | DE19848269A1 Electronic leveling instrument |
| 04/28/1999 | EP0910863A1 Amplified sensor arrays |
| 04/28/1999 | CN1215155A Multiplexing high resolution measuring system for frequency change of multimode optical fibre laser sound transducer |
| 04/27/1999 | US5897494 Vibrometer |
| 04/27/1999 | CA2185473C Vibration sensors for use in micro-gravity environment |
| 04/15/1999 | DE19736169A1 Method to measure deformation or vibration using electronic speckle pattern interferometry |
| 04/14/1999 | EP0908709A2 Device for contactless vibration measurement |
| 04/13/1999 | US5894531 Method and apparatus for detection of ultrasound using a fiber-optic interferometer |
| 04/06/1999 | US5891747 Interferometric fiber optic displacement sensor |
| 04/01/1999 | WO1999015863A1 Acoustical imaging system |
| 03/23/1999 | US5886265 Optical vibration sensor |
| 03/18/1999 | DE19740678A1 Optical position or vibration measuring device using laser interferometer |
| 03/17/1999 | EP0902263A1 Method and apparatus for determining the vibrations of the rotor of a rotary machine |
| 03/16/1999 | US5883715 Laser vibrometer for vibration measurements |
| 03/11/1999 | DE19739247A1 Twisting vibration detector for silicon@ monocrystal |
| 02/16/1999 | US5872876 Optical fibre sensor element |
| 02/11/1999 | WO1999006804A1 Voice monitoring system using laser beam |
| 02/11/1999 | CA2266923A1 Voice monitoring system using laser beam |
| 02/04/1999 | DE19732968A1 Ultrasonic probe head for medical ultrasonography |
| 02/03/1999 | EP0895095A1 Vibration detection |
| 02/03/1999 | EP0895072A2 System for multiplexed high resolution measurement of frequency variations in multimode fiber laser acoustic sensors |
| 02/02/1999 | US5867258 System for multiplexed high resolution measurement of frequency variations in multimode fiber laser acoustic sensors |
| 02/02/1999 | US5866898 Time domain multiplexed amplified sensor array with improved signal to noise ratios |
| 01/07/1999 | DE19728653A1 Method to detect surface vibrations of bodies for evaluating quality |
| 01/06/1999 | CN1204047A Beam direction microdrift detecting system |
| 12/22/1998 | US5852233 For the examination of a specimen |
| 12/09/1998 | EP0882961A2 Environmental sensing |
| 12/08/1998 | US5847281 System for measuring ultrasonically the elastic properties of a moving paper web |
| 12/06/1998 | CA2236201A1 An unbalanced fiber optic michelson interferometer as an optical pick-off |
| 12/02/1998 | EP0813802B1 Passive acousto-optic modulator |
| 11/24/1998 | US5841030 Process for the determining the vibration characteristics of a body |
| 11/24/1998 | CA2007190C Laser optical ultrasound detection |
| 11/17/1998 | US5838439 System for measuring vibration of an object using a coherent optical beam |
| 11/10/1998 | US5834632 Photo-acoustic leak detector with multiple beams |
| 11/04/1998 | EP0875125A1 Flexible interlink for hydrophone array |
| 11/03/1998 | US5832157 Fiber optic acoustic emission sensor |
| 10/28/1998 | CN1197202A Extended, flexible, spatially weighted fiber optic interferometric hydrophone |
| 10/27/1998 | US5828331 Vibration detection |
| 10/27/1998 | US5827971 Optical vibration detection spectral analysis assembly and method for detecting vibration in an object of interest |
| 10/20/1998 | US5825489 Mandrell based embedded planar fiber-optic interferometric acoustic sensor |
| 10/20/1998 | US5825465 Autodyne detection laser velocimeter |
| 10/20/1998 | US5824884 Photo-acoustic leak detector with baseline measuring |
| 10/14/1998 | EP0803049B1 Diagnostic system for fiber grating sensors |
| 10/08/1998 | WO1998044328A1 Photo-acoustic leak detector with multiple beams |
| 09/15/1998 | US5808779 Optical fiber modulation and demodulation system |
| 09/15/1998 | US5808743 For measuring a target |
| 09/08/1998 | US5805753 Optical fibers with high acceleration sensitivity and low pressure sensitivity |
| 09/03/1998 | WO1998038476A1 Imaging photorefractive optical vibration measurement method and device |
| 09/03/1998 | DE19708806C1 Fibre=optic hydrophone-probe for measuring pressure amplitudes in liquid medium |
| 09/02/1998 | EP0862225A2 Transparent light beam detectors |
| 09/02/1998 | CN1191968A State monitoring method for rotary machines based on twisting vibration |
| 09/01/1998 | US5801969 Method and apparatus for computational fluid dynamic analysis with error estimation functions |
| 09/01/1998 | CA2096069C Vibration detection and reduction system and vibration sensors for use in micro-gravity environment |
| 08/20/1998 | DE19741747C1 Durable fibre optic hydrophone with small angle of contact, reducing risk of signal failure |
| 08/18/1998 | US5796504 Fiber-optic telemetry system and method for large arrays of sensors |
| 08/13/1998 | WO1998035208A1 Fiber optic bragg grating sensor system for use in vertical seismic profiling |
| 08/05/1998 | EP0856149A1 Passive sensor for monitoring vibration of a combustion turbine blade |
| 08/04/1998 | US5790255 Position sensitive detector |
| 07/28/1998 | US5787212 Optical coupler sensor with movable optical waveguide |
| 07/28/1998 | US5787053 Hydrophone array system |
| 07/14/1998 | CA2130429C Optical sensor displacement monitor |
| 06/25/1998 | DE19707109C1 Optical vibrometer for measuring object oscillation in perpendicular directions |
| 06/18/1998 | WO1998026259A1 Hydrophone with compensation for statical pressure and method for pressure wave measurement |
| 06/16/1998 | CA2121880C Optical signal detection apparatus and method for preventing polarization signal fading in optical fiber interferometric sensor systems |
| 06/16/1998 | CA2013406C Optical detection of a surface motion of an object |
| 06/09/1998 | US5761956 Passive combustion turbine blade vibration monitor sensor |
| 06/02/1998 | US5760904 Method and system for inspecting a surface of an object with laser ultrasound |
| 05/05/1998 | US5748565 Flexible interlink for hydrophone array |
| 05/05/1998 | US5748564 Amplified acousto-optical vibration sensor and ultrasonic transducer array |
| 04/22/1998 | EP0836408A1 Apparatus and method for measuring tympanic displacement |
| 04/16/1998 | WO1998015850A1 Method of obtaining improved geophysical information about earth formations |
| 04/07/1998 | US5737278 Extended, flexible, spatially weighted fiber optic interferometric hydrophone |
| 04/02/1998 | WO1998014031A1 Flexible interlink for hydrophone array |
| 04/01/1998 | EP0832418A1 Sensitive and fast response optical detection of transient motion from a scattering surface by two-wave mixing |
| 03/31/1998 | US5734623 Fiber optic sound velocity profiler |
| 03/31/1998 | US5734108 System for sensing shaft displacement and strain |
| 03/24/1998 | US5732046 Active fiber-optic opto-acoustic detector |
| 03/10/1998 | US5726444 Ultrasonic directional fiber-optic hydrophone |
| 02/25/1998 | EP0711406B1 Acoustic microscope |
| 01/28/1998 | EP0821246A1 Self-mixing laser velocimeter |
| 01/27/1998 | US5711308 Wearable apparatus for measuring displacement of an in vivo tympanum and methods and systems for use therewith |
| 01/22/1998 | WO1998002898A1 Amplified sensor arrays |
| 01/22/1998 | WO1998002866A1 System and method for detecting deformation of a membrane |
| 12/29/1997 | EP0814326A2 Extended, flexible, spatially weighted fibre optic interferometric hydrophone |