| Patents for G01H 11 - Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties (3,253) |
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| 02/03/2005 | US20050022600 Method and device to determine the natural frequencies of a bearing system having a shaft arranged on bearings |
| 02/02/2005 | CN1573159A Machinery |
| 02/02/2005 | CN1572963A 洗衣机 Washing machine |
| 02/01/2005 | US6848315 Vibration detecting system of resilient body and vibrating contact detection probe |
| 01/31/2005 | CA2475713A1 Multiple-transducer sensor system and method with selective activation and isolation of individual transducers |
| 01/27/2005 | US20050016277 Mass sensor and mass sensing method |
| 01/26/2005 | CN1186600C Extraction and monitoring method of half-speed vortex on-line stability characteristics of high-speed rotating machine |
| 01/19/2005 | EP1498291A1 System, tyre and method for determining the behaviour of a tyre in motion |
| 01/11/2005 | US6840123 Mass sensor and mass sensing method |
| 01/05/2005 | EP1493005A1 Piezoelectric vibration sensor |
| 12/30/2004 | US20040267407 Machinery |
| 12/30/2004 | DE202004014914U1 Rotary oscillation analysis arrangement for use with components having gear wheels and or toothed chains has field plate sensors that generate an output signal with zero crossings corresponding to tooth head and tooth base |
| 12/30/2004 | DE10325803A1 Tap drip detector uses piezoelectric element to record sound and processes it to recognize drip noises as drips |
| 12/29/2004 | CN1558190A Digital vibration and impact sensor |
| 12/23/2004 | US20040255679 System and method of measuring and classifying the impacts inside a revolving mill used in mineral grinding |
| 12/22/2004 | EP1212832B1 Device and method for high-sensitivity resolution detection |
| 12/21/2004 | US6832519 Vibration detecting apparatus |
| 12/14/2004 | US6831394 Backing material for micromachined ultrasonic transducer devices |
| 12/09/2004 | US20040244488 On-chip magnetic force actuation of microcantilevers by coplanar coils |
| 12/09/2004 | DE4318466B4 Verfahren zur Herstellung eines mikromechanischen Sensors A process for producing a micromechanical sensor |
| 12/08/2004 | CN1553154A Measuring method and probe for three-dimensional vector sound intensity |
| 12/01/2004 | EP1254352A4 Downhole densitometer |
| 12/01/2004 | CN1550768A Bearing shock detecting device and method ,and radial bearing for detecting shock using same |
| 12/01/2004 | CN1177654C Method for makinga sonoprobe |
| 11/24/2004 | EP1478908A1 Acoustic sensor for monitoring machining processes in machining tools |
| 11/24/2004 | EP0943903B1 Mass sensor and mass detection method |
| 11/23/2004 | US6820469 Microfabricated teeter-totter resonator |
| 11/17/2004 | EP1477870A2 Active vibration damper for machinery |
| 11/16/2004 | US6817245 Acceleration sensor |
| 11/10/2004 | CN2655204Y Vibration sensor |
| 11/10/2004 | CN1175710C Semiconductor device |
| 11/04/2004 | WO2004025232A3 Method and device for detecting oscillations of the shafting of an electric machine |
| 11/04/2004 | DE4424635B4 Mikromechanischer Beschleunigungssensor Micro-mechanical acceleration sensor |
| 11/02/2004 | CA2238774C Vibration wave detector |
| 10/26/2004 | US6807863 Vibration pickup comprising a pressure sleeve |
| 10/21/2004 | US20040206183 Ultrasonic probe and method for the fabrication thereof |
| 10/21/2004 | US20040206177 Acceleration sensor |
| 10/21/2004 | DE102004009345A1 Brennkraftmaschinenklopfsensor und Anordnung für dessen Montage Engine knock sensor and arrangement for its assembly |
| 10/13/2004 | EP1263616B1 System, tyre and method for determining the behaviour of a tyre in motion |
| 10/07/2004 | WO2004086058A1 A method and a sensor for detecting low-frequency oscillation phenomena or deviations from imaginary stationary states |
| 10/07/2004 | WO2004021298A3 Sensor apparatus and method for detecting earthquake generated p- waves and generating a responsive control signal |
| 10/06/2004 | EP1463936A1 Ultrasonic sensor having enhanced dynamic range |
| 10/06/2004 | CN1534281A Knocking sensor mounting structure for IC engine and knocking sensor for IC engine |
| 09/30/2004 | US20040187584 Vibration detecting apparatus |
| 09/30/2004 | US20040187559 Engine knock sensor and structure for mounting the same |
| 09/22/2004 | CN1531645A Micro-machined ultrasonic transducer (MUT) having improved sensitivity |
| 09/08/2004 | CN1165773C Impedance detection apparatus and method |
| 08/11/2004 | CN2632649Y Frequency correcting controller of oscillating plate |
| 08/11/2004 | CN1161624C Capacitance detection system and method |
| 08/05/2004 | WO2004066406A2 A piezoelectric element and method for manufacturing |
| 08/05/2004 | WO2004066353A2 A piezoelectric element and method for manufacturing |
| 08/04/2004 | CN1160579C Ultrasonic sensor |
| 08/03/2004 | US6769305 Acceleration sensor |
| 07/28/2004 | EP1440295A2 Micro-machined ultrasonic transducer (mut) having improved sensitivity |
| 07/22/2004 | US20040139803 Multi-axis vibration sensor with integral magnet |
| 07/21/2004 | CN1158793C Sound communication system between portable unit and communication terminal |
| 07/15/2004 | US20040135698 Sensor apparatus and method for detecting earthquake generated P-waves and generating a responsive control signal |
| 07/15/2004 | US20040135588 Non intrusive and dynamic method for measuring a distance or the variation thereof through dielectrics |
| 07/14/2004 | CN2625863Y Vibrating board frequency corrector |
| 07/08/2004 | DE19647834B4 Sensor zum Erfassen von Schwingungen Sensor for detecting vibrations |
| 07/07/2004 | CN1157098C Electronic converter, timer having same and bidirection communication method |
| 07/01/2004 | US20040123645 Single tube densitometer |
| 07/01/2004 | DE19925979B4 Vorrichtung und Verfahren zur Bestimmung von Frequenz und Amplitude einer schwingenden Struktur, insbesondere zur Messung von Beschleunigungen oder Drehraten Apparatus and method for determining frequency and amplitude of a vibrating structure, in particular for the measurement of accelerations or angular rate |
| 06/24/2004 | DE10341900A1 Ultraschallsensor Ultrasonic sensor |
| 06/17/2004 | US20040113524 Backing material for micromachined ultrasonic transducer devices |
| 06/10/2004 | WO2004010730A3 Ultrasonic transducer for electronic devices |
| 06/09/2004 | DE10216460B4 Selbstüberwachender piezoelektrischer Sensor Self-monitoring of piezoelectric sensor |
| 06/09/2004 | CN2620257Y 3-D vector sound intensity measuring probe |
| 06/08/2004 | US6747916 Communication system between a portable unit and a communication terminal |
| 06/03/2004 | DE10254024A1 Vibrating floor movement analysis device for use in patient postural training has a vibrating floor with markings on it that are monitored by a stationary measurement system in additional to at least one virtual point |
| 05/13/2004 | WO2004016036A3 Micromachined ultrasonic transducers and method of fabrication |
| 05/13/2004 | US20040089072 Methods and apparatus for measuring flexural wave and/or flexural vibration using a magnetostrictive sensor |
| 05/06/2004 | WO2003011481A3 Micro-machined ultrasonic transducer (mut) having improved sensitivity |
| 05/06/2004 | US20040085858 Micromachined ultrasonic transducers and method of fabrication |
| 05/06/2004 | EP1012547B1 Miniature semiconductor condenser microphone |
| 05/06/2004 | DE19944452B4 Vorrichtung und Verfahren zum Ermitteln des Ortes der Wechselwirkung einer akustischen Oberflächenwelle Apparatus and method for determining the location of the interaction of a surface acoustic wave |
| 05/04/2004 | US6729001 Method for making a sonoprobe |
| 04/22/2004 | DE19612540B4 Schwingungsaufnehmer mit Druckhülse Vibration sensor with ferrule |
| 04/20/2004 | US6724127 Piezoelectric/electrostrictive device |
| 04/20/2004 | US6722206 Force sensing MEMS device for sensing an oscillating force |
| 04/15/2004 | US20040069067 Fluorescence measurement apparatus and method |
| 04/07/2004 | EP1405048A1 Method and apparatus for tracking musical score |
| 04/01/2004 | US20040064219 System, tyre and method for determining the behaviour of a tyre in motion |
| 04/01/2004 | US20040060358 Acoustic sensors using microstructures tunable with energy other than acoustic energy |
| 03/25/2004 | WO2004025232A2 Method and device for detecting oscillations of the shafting of an electric machine |
| 03/24/2004 | CN1143189C System for automatically setting portable object with clock function |
| 03/11/2004 | WO2004021298A2 Sensor apparatus and method for detecting earthquake generated p- waves and generating a responsive control signal |
| 03/11/2004 | CA2496988A1 Sensor apparatus and method for detecting earthquake generated p-waves and generating a responsive control signal |
| 02/26/2004 | WO2004017033A1 Vibration information transmission apparatus and vibration monitoring/analyzing system |
| 02/26/2004 | US20040035209 Vibration source probe system |
| 02/19/2004 | WO2004016036A2 Micromachined ultrasonic transducers and method of fabrication |
| 02/19/2004 | DE10009169B4 Schwingungsaufnehmer mit einer Druckhülse Vibration sensor with a pressure sleeve |
| 02/10/2004 | US6688176 Single tube densitometer |
| 02/10/2004 | CA2255975C Measuring circuit |
| 01/29/2004 | WO2004010730A2 Ultrasonic transducer for electronic devices |
| 01/28/2004 | EP1384043A1 Non intrusive and dynamic method for measuring a distance or the variation thereof through dielectrics |
| 01/27/2004 | US6681631 Piezoelectric sensor |
| 01/07/2004 | CN1465961A Water level and vibration detection sensor for washing machine |
| 01/06/2004 | US6672168 Multi-level machine vibration tester marker pen |
| 12/31/2003 | WO2004001353A1 Sensor |