| Patents for G01H 17 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass (3,373) |
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| 04/20/1993 | US5203209 Motion measurement of acoustically levitated object |
| 04/15/1993 | WO1993007463A1 Plate-mode ultrasonic structure including a gel |
| 04/14/1993 | EP0536415A1 Device for sensing abnormality in bearing of blower for gas laser |
| 04/13/1993 | US5201292 Apparatus and method for detecting vibration patterns |
| 03/04/1993 | WO1993004365A1 Method and device for the detection and location of changes in a turbine component |
| 03/03/1993 | EP0529786A2 Apparatus and method for detecting vibration patterns |
| 03/02/1993 | US5189914 Plate-mode ultrasonic sensor |
| 03/01/1993 | CA2073230A1 Apparatus and method for detecting vibration patterns |
| 02/16/1993 | US5187692 Acoustic transfer function simulating method and simulator using the same |
| 01/21/1993 | DE4223649A1 Knock detector for vehicle IC engine - digitises and filters knock sensor signal using two digital filters with centre frequency shifting depending on resonance frequency components |
| 12/17/1992 | DE4219318A1 Measuring contact angle of ball bearing roller elements - measuring vibrations of inner or outer bearing ring whilst one ring is rotating and other is stationary |
| 12/08/1992 | US5168758 Force/strain and structure-borne noise transducer |
| 11/26/1992 | WO1992021021A1 Improvements in and relating to particle detection and analysis |
| 11/12/1992 | WO1992020126A1 Device for sensing abnormality in bearing of blower for gas laser |
| 11/10/1992 | US5163015 Apparatus for and method of analyzing coupling characteristics |
| 11/03/1992 | CA1309576C Double eccentric mount |
| 10/27/1992 | US5159563 Crack detection method for operating shaft |
| 10/21/1992 | EP0509654A2 Time domain compensation for transducer mismatch |
| 10/01/1992 | WO1992016897A1 Dynamical system analyser |
| 09/30/1992 | EP0505949A1 Acoustic transfer function simulating method and simulator using the same |
| 09/15/1992 | US5146776 Method for continuously calibrating an optical vibration sensor |
| 08/26/1992 | EP0500368A1 Survival detection system |
| 08/26/1992 | CA2061754A1 Survival seismic detection system having improved tunable filter |
| 07/28/1992 | US5134591 Survival seismic detection system having improved tunable filter |
| 07/14/1992 | US5129262 Plate-mode ultrasonic sensor |
| 06/09/1992 | CA1303176C Method for eliminating sensor drift in a vibration monitoring system |
| 05/26/1992 | USRE33937 Active vibration isolation system |
| 05/26/1992 | US5115779 Engine knock detecting system |
| 05/05/1992 | US5109699 Sonic casting tester |
| 04/14/1992 | US5105412 Recording medium playing apparatus for correcting audio signals using an appropriate sound field |
| 04/02/1992 | WO1992005438A1 Crack detection method for shaft at rest |
| 04/02/1992 | WO1992005437A1 Crack detection method for operating shaft |
| 04/02/1992 | DE4030753A1 Calculating sound dispersion in flowing media - separating surface into partial areas small compared with wavelengths produced by sound pressure of vibrating surface |
| 03/25/1992 | EP0476285A1 Method and device for automatic recognition of raising resonance during balancing |
| 03/17/1992 | CA1297576C Ultrasonic transducer and current loop transmitter |
| 03/03/1992 | US5092160 System and method for detecting engine knock in internal combustion engines |
| 02/12/1992 | CN2096052U Vibrator type electret vibration sensor |
| 02/11/1992 | US5088044 Knocking detection device for an automotive engine |
| 01/29/1992 | EP0468547A2 Active vibration isolation system |
| 01/28/1992 | US5083462 Process and device for detecting defects in moving parts having a central rotating shaft |
| 01/01/1992 | CN1015275B Installation of sensor for turbine |
| 12/18/1991 | CN1057107A 超声功率计 Ultrasonic Power Meter |
| 12/17/1991 | USRE33771 Visualizing method for three dimensional standing wave sound field |
| 12/04/1991 | EP0459948A2 Receiver-combination for force, elongation and sound conducted through solids |
| 11/26/1991 | US5068800 Crack detection method for shaft at rest |
| 10/23/1991 | EP0453293A2 Sound field variable apparatus |
| 10/09/1991 | EP0450829A1 Intelligent programmable sensor |
| 10/08/1991 | US5055837 Analysis and identification of a drilling fluid column based on decoding of measurement-while-drilling signals |
| 07/31/1991 | CN1013405B Method for determinating turbine blade resonance vibration |
| 07/30/1991 | US5036467 Method and apparatus for sensing a vehicle crash in real time using a frequency domain integration and summation algorithm |
| 07/26/1991 | CA2008623A1 The inventor |
| 06/18/1991 | CA1285061C Method and appliance for evaluating the sound emission property of hollow components and their use particularly in the motor-vehicle industry |
| 06/12/1991 | CN2078896U 无触点微音器 Non-contact microphone |
| 06/11/1991 | US5022268 Passive acoustics system to monitor fluidized bed systems |
| 06/11/1991 | US5022267 Bearing roller gauge |
| 04/30/1991 | US5010769 Automatic pseudokeyphasor generator |
| 04/10/1991 | EP0421065A2 Method and means for vibration control of the wheel system of a car while driving |
| 04/09/1991 | US5005439 Inertia force generating device |
| 04/09/1991 | US5005415 Method and apparatus for detecting variations in a process by processing emitted acoustic signals |
| 04/02/1991 | CA1282249C Calibration impact hammer |
| 01/29/1991 | US4989143 Adaptive coherent energy beam formation using iterative phase conjugation |
| 01/29/1991 | US4988979 Fault inspection system for rotary machines |
| 01/23/1991 | EP0409462A1 Inertia force generating device |
| 01/23/1991 | CN1011341B Method for eliminating sensor drift in vibration monitoring system |
| 01/15/1991 | CA2020801A1 Inertia force generating device |
| 01/02/1991 | EP0406020A2 Apparatus for and method of analyzing coupling characteristics |
| 11/28/1990 | EP0399796A2 Passive acoustics system to Monitor fluidized bed systems |
| 11/28/1990 | EP0399386A2 Adaptive analysis apparatus |
| 11/28/1990 | EP0399382A2 Multi-channel adaptive canceler |
| 11/25/1990 | CA2015253A1 Adaptive analysis apparatus |
| 11/22/1990 | EP0397718A1 Detector device for operational monitoring of a machine or a process |
| 11/22/1990 | EP0323956B1 Spark plug provided with a measurement device |
| 10/30/1990 | US4966031 Vibration sensor |
| 10/18/1990 | DE4012278A1 Diagnostic system for installations with special operating conditions - uses neural network model for efficient, objective diagnosis |
| 09/25/1990 | US4958515 For use in an internal combustion engine |
| 09/18/1990 | US4958296 Water-leakage detecting apparatus and method which are little influenced by noise |
| 08/28/1990 | US4953089 Hybrid analog digital control method and apparatus for estimation of absolute velocity in active suspension systems |
| 08/07/1990 | US4945876 System and method for detecting knocking in an internal combustion engine |
| 05/02/1990 | EP0366286A2 A method and apparatus for processing electrical signals |
| 04/17/1990 | CA1267950A1 Method and circuit arrangement for measuring the dynamical behavior of a rotating body |
| 03/07/1990 | EP0357104A1 Process and device for detecting defects in moving parts having a central rotating shaft |
| 01/30/1990 | US4897823 Method for location of shocks with a structure-borne sound monitoring system, in particular in pressurized enclosures in power plants |
| 01/02/1990 | US4890480 Relating to devices for measuring fluid density |
| 12/05/1989 | US4885708 Apparatus and method for measuring frequency response function |
| 11/28/1989 | US4884206 Process and processing circuit for the analog output signal of a sensor |
| 11/21/1989 | US4881401 Knock detection system |
| 11/15/1989 | EP0341883A2 Hybrid analog digital control method and apparatus for estimation of absolute velocity in active suspension system |
| 10/31/1989 | US4878210 Visualizing method for three dimensional standing wave sound field |
| 10/26/1989 | DE3812434A1 Method and circuit arrangement for the measurement of ultrasonic attenuation in a specimen |
| 09/08/1989 | WO1989008336A1 Plate-mode ultrasonic sensor |
| 09/05/1989 | US4862749 Shaft torsional vibration monitor for a multi-mass rotary shaft system |
| 07/27/1989 | WO1989006843A1 Detector device for operational monitoring of a machine or a process |
| 07/19/1989 | EP0324187A2 Vibration sensor |
| 07/19/1989 | EP0323956A1 Spark plug provided with a measurement device. |
| 06/14/1989 | EP0320303A2 Coherent beam formation |
| 06/13/1989 | US4838072 Method and appliance for evaluating the sound emission property of hollow components |
| 05/24/1989 | EP0317322A2 Method for monitoring acoustic emissions |
| 05/24/1989 | EP0316958A1 Apparatus and method for measuring frequency response function |
| 05/10/1989 | EP0315199A2 Ultrasonic transducer and current loop transmitter |
| 04/25/1989 | US4823600 Ultrasonic transducer and current loop transmitter |