| 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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| 04/25/1989 | CA1253211A1 Laser based sensor and telemetry system |
| 04/11/1989 | US4819600 Knock detection system for an internal combustion engine |
| 04/05/1989 | EP0309829A1 Procedure and device for monitoring the mechanical integrity of a component |
| 04/04/1989 | US4817614 Method and apparatus for adaptive focusing in a medical ultrasound imaging apparatus |
| 04/04/1989 | US4817417 Aligning and securing the geometric center of a sensor |
| 03/28/1989 | US4816743 Measuring method |
| 03/08/1989 | CN2033802U Vibrograph |
| 03/08/1989 | CN1003538B Turbine blade vibration detection apparatus |
| 03/01/1989 | EP0305133A2 Improvements in or relating to devices for measuring fluid density |
| 02/21/1989 | US4805442 Knocking sensor for internal combustion engine |
| 01/24/1989 | US4800512 Method and apparatus for determining and detecting data indicative of the condition of machines through a unique data probe including a test data probe portion and an identifying data sensing probe portion |
| 01/17/1989 | US4798087 Inclination detector |
| 01/11/1989 | EP0298090A1 Acoustic sensor |
| 01/10/1989 | US4796873 Active vibration isolation system |
| 01/03/1989 | CA1248216A1 Active vibration isolation system |
| 12/13/1988 | US4790189 Method for eliminating sensor drift in a vibration monitoring system |
| 11/16/1988 | CN88102452A Double eccentric mount |
| 11/09/1988 | EP0290375A1 Apparatus for the metrological control of the driving-in of a cement-free implantable stem prosthesis |
| 11/02/1988 | EP0148256B1 System for operational monitoring of a machine |
| 10/11/1988 | US4776216 Programmable jet blade excitation system |
| 09/28/1988 | EP0284087A2 A shaft torsional vibration monitor for a multi-mass rotary shaft system |
| 09/14/1988 | CN88101105A Method for eliminating sensor drift in vibration monitoring system |
| 09/14/1988 | CN87211309U 噪声自动监测仪 Noise Diver |
| 09/07/1988 | EP0281377A2 Knock detection system |
| 09/07/1988 | CN88100992A Programmable jet blade excitation system |
| 09/06/1988 | US4769594 Method and circuit arrangement for measuring the dynamical behavior of a rotating body |
| 09/06/1988 | US4768380 Method and means for detecting faults or defects in moving machine parts |
| 08/24/1988 | EP0279184A1 Impact localising method using an acoustic emission monitoring system, in particular for pressure-retaining boundaries in power plants |
| 08/18/1988 | DE3802138A1 Nachweissystem fuer materialfehler Detection system for material errors |
| 08/16/1988 | US4764760 Automatic gain control for machine tool monitor |
| 08/09/1988 | US4761993 Method for monitoring the operation of an internal combustion engine |
| 07/19/1988 | US4758964 Method and apparatus for monitoring machine parts |
| 07/13/1988 | EP0274300A1 Process and device for evaluating the capacity of hollow pieces to emit sound, and their use, especially in the automobile industry |
| 06/30/1988 | WO1988004771A1 Vibration monitoring apparatus |
| 06/22/1988 | EP0272244A2 Method and device for determining vibration characteristics and for driving a piezoelectric transducer |
| 06/15/1988 | EP0271294A1 Knock detection circuit |
| 06/14/1988 | US4751657 Method and apparatus for detecting axial cracks in rotors for rotating machinery |
| 06/14/1988 | US4751382 Laser sensor with encoded laser output signal |
| 06/02/1988 | WO1988004032A1 Acoustic sensor |
| 03/30/1988 | EP0261768A2 Laser based sensor and telemetry apparatus |
| 03/29/1988 | US4734681 Sensor for detecting condition in slurry transport line of wet blasting apparatus |
| 03/24/1988 | WO1988002108A1 Spark plug provided with a measurement device |
| 03/15/1988 | CA1234201A1 Turbine blade vibration detection apparatus |
| 02/24/1988 | EP0256481A1 Method and equipment for adaptive focussing in a medical ultrasonic imaging apparatus |
| 12/29/1987 | US4715219 Acoustic calibration device |
| 10/21/1987 | EP0242060A2 Acoustic inspection method for ceramic coatings of catalytic converter monolith substrates |
| 10/21/1987 | EP0241781A1 Operating supervision method for a running internal-combustion engine |
| 09/29/1987 | US4696446 System for detecting flat portion of peripheral surface of vehicle wheel |
| 09/01/1987 | US4689985 Calibration impact hammer |
| 08/04/1987 | CA1224938A1 Resonator transducer system with temperature compensation |
| 07/28/1987 | US4683542 Vibration monitoring apparatus |
| 07/01/1987 | EP0227138A1 Means for detecting faults or defects in moving machine parts |
| 05/19/1987 | US4666655 Mechanical pulse sensors, accelerometers |
| 04/28/1987 | US4660517 Vibration detecting apparatus for multi-rotor rotary piston engines |
| 03/31/1987 | US4653327 Acoustical inspection method for inspecting the ceramic coating of catalytic converter monolith substrates |
| 03/03/1987 | US4646748 Ultrasonic measurement method, and apparatus therefor |
| 02/25/1987 | EP0211212A2 Process and device for the determination and evaluation of machine parameters |
| 02/12/1987 | WO1987000918A1 Vibration monitoring apparatus |
| 02/10/1987 | US4642618 Tool failure detector |
| 01/28/1987 | EP0209680A2 Tool failure detector |
| 01/20/1987 | US4637247 Method of recognizing knocking signals in a received signal derived from a knocking sensor in an internal combustion engine, and system carrying out the method |
| 01/20/1987 | US4637245 Knock deriving apparatus for internal combustion engines |
| 01/06/1987 | US4635210 Method of and apparatus for detecting crack condition |
| 12/03/1986 | CN85107694A Turbine blade vibration detection apparatus |
| 11/04/1986 | US4621263 Vibration telemetering system |
| 10/28/1986 | US4619267 Method for characterizing the structure of a medium and device for carrying out the method |
| 10/01/1986 | EP0195850A2 Active vibration isolation system |
| 09/30/1986 | US4614117 Vibration monitoring apparatus |
| 09/17/1986 | EP0194333A1 Process and appliance for the detection and evaluation of condition data of machines |
| 08/26/1986 | US4607529 Vibration analysis |
| 08/12/1986 | US4605924 Method and apparatus for acoustically monitoring an industrial plant |
| 07/15/1986 | US4599982 Knock control apparatus for internal combustion engines |
| 07/15/1986 | US4599898 Method and apparatus for testing ball striking rackets |
| 07/09/1986 | EP0187081A1 Process and processing sequence of the analogous output signal of a sensor |
| 07/08/1986 | US4598681 Automotive engine with knock sensor |
| 06/10/1986 | US4593553 Method for detecting engine knock in internal combustion engines |
| 05/13/1986 | CA1204270A1 Continuous casting mold oscillator load indication system |
| 04/30/1986 | EP0179618A2 Turbine blade vibration detection apparatus |
| 04/29/1986 | US4585552 System for the measurement of the difference between two fluid flows in separate ducts |
| 04/29/1986 | US4584869 Method and apparatus for detecting knock in a spark ignition engine |
| 04/23/1986 | EP0178468A2 Process for determining the need for repair of machine parts of a transport unit |
| 04/15/1986 | US4583175 Method and apparatus of ignition timing control |
| 03/25/1986 | US4577503 Method and device for detecting a specific acoustic spectral feature |
| 03/12/1986 | EP0173955A2 A method and device for detecting a specific acoustic spectral feature |
| 03/04/1986 | US4573358 Turbine blade vibration detection apparatus |
| 02/19/1986 | EP0171639A1 Device for elaborating knock signals |
| 01/28/1986 | US4566460 Measuring method and apparatus for non-linear parameter of acoustic medium and its application |
| 01/28/1986 | CA1200004A1 Device for the determination of the vibrations occurring at the internals of a reactor pressure vessel |
| 01/21/1986 | US4565171 Knock controller for an internal combustion engine |
| 01/21/1986 | US4565087 Method and apparatus for recognition of knocking in an internal combustion engine |
| 01/08/1986 | EP0166836A1 Method for characterising the structure of a medium and apparatus therefor |
| 12/31/1985 | US4561389 Engine operation control means for suppressing rough engine operations |
| 12/24/1985 | US4559828 System for operational monitoring of a machine |
| 11/12/1985 | US4552111 Engine knocking detecting means |
| 10/15/1985 | CA1195418A1 Method and apparatus for detecting rubbing in a rotary machine |
| 09/18/1985 | EP0154869A1 Ultrasonic measurement apparatus |
| 09/10/1985 | US4539957 Ignition timing control system for internal combustion engines |
| 09/10/1985 | CA1193352A1 Acoustic monitoring method and device for industrial installations |
| 08/20/1985 | US4535638 Resonator transducer system with temperature compensation |
| 08/06/1985 | US4532975 Continuous casting mold oscillator load indication system |