Patents Assigned to 01 dB Metravib
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POWER EFFICIENT MACHINE DIAGNOSTIC MONITORING USING MULTIPLE VIBRATION SENSOR WIRELESS CONFIGURATION
Publication number: 20180149516Abstract: A wireless monitoring unit performs condition monitoring associated with a test point location of a host machine. The unit includes a high performance vibration sensor useful for monitoring the host machine for fault conditions and the like. The unit includes a second vibration sensor that has poorer metrological performance, but draws a comparatively insignificant amount of power from the battery. The second sensor takes a vibration measure periodically, which measure is processed to evaluate whether the machine is in a state eligible to undergo a health assessment. Diagnostic monitoring using the high performance vibration sensor is enabled only when the host machine it is in the eligible state. A low power temperature sensor provides additional data for guarding against a false trigger, in effect allowing the processor to distinguish against vibration from another machine propagating to the host machine causing the host machine to vibrate while the host machine is not running.Type: ApplicationFiled: November 28, 2016Publication date: May 31, 2018Applicant: 01dB-Metravib, Societe par Actions SimplifieeInventors: Bertrand WASCAT, Thierry MAZOYER, Patrick LABEYRIE, Guillaume LAVAURE, Philippe POIZAT -
Patent number: 9921136Abstract: A sensor unit is configured as a single body, removably mounted in its entirety to a test point location on a machine so machine vibrations propagate into the single body. Within are an accelerometer, circuit board, wireless interface, signal processor, and battery. The sensor unit transmits sensor data wirelessly in real time to a data collection unit. A technician with data collection unit in hand goes from machine to machine, along a route of multiple test point locations on multiple machines, mounting and dismounting the sensor unit and collecting machine vibration data. The sensor unit is configured to reduce frequency response impacts of the mass and volume of the circuit board, wireless interface, signal processor, and battery on dynamic behavior of the sensor unit with respect to machine vibrations to achieve a frequency response rating comparable to a wired sensor.Type: GrantFiled: August 5, 2014Date of Patent: March 20, 2018Assignee: 01dB-Metravib, Societe Par Actions SimplifeeInventors: Bertrand Wascat, Philippe Poizat, Patrick Labeyrie, Thierry Mazoyer
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Patent number: 9913006Abstract: Data acquisition and automatic diagnosis is performed at test points by respective wireless monitoring units (WMU). Each WMU tests a first indicator periodically at a first rate to determine whether to test a full set of indicators. Evolution of the first indicator determines the pass/fail result of a reduced assessment of the corresponding test point. The pass/fail result is automatically sent off-site to a central database. When a fail occurs, a full assessment is performed, which includes monitoring the full set of indicators. Automatic diagnosis is performed based on the full set of indicators. The reduced assessment does not include automatic diagnosis of a test point, but is used to decide whether to perform the full assessment and automatic diagnosis. Results of the automatic diagnosis are sent to the central database. Raw data is not sent automatically.Type: GrantFiled: November 28, 2016Date of Patent: March 6, 2018Assignee: 01dB-METRAVIB, Société par Actions SimplifiéeInventors: Bertrand Wascat, Thierry Mazoyer, Patrick Labeyrie, Guillaume Lavaure, Philippe Poizat
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Publication number: 20170248451Abstract: A device for assembling together at a determined orientation a sensor (3) with a thread (6) and a support (2) having a tapped hole (12), the device including a first threaded portion (9) adapted to co-operate with the thread (6) of the sensor and a second threaded portion (11), of pitch different from the pitch of the first threaded portion, and suitable for co-operating with the tapped hole (12) of the support. The device also includes a washer (14) presenting on one side a bearing face (15) for bearing against the sensor, and on its other side, a contact face (16) for contacting the support, the washer (14) being provided with a through bore (25) for mounting the assembly element, the washer and the element being mounted together by an assembly system (30) connecting them together in rotation about the longitudinal axis, while leaving them free to move in translation.Type: ApplicationFiled: October 29, 2015Publication date: August 31, 2017Applicant: 01DB-METRAVIBInventors: Franck GINET, Pascal VOUAGNER, Thierry MAZOYER
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Patent number: 9322808Abstract: The present invention relates to a method of non-destructive inspection of mechanical structures (2) by using vibratory waves in order to detect local defects and/or changes of state. According to the invention, the method comprises: a first training stage in which a transient vibratory excitation is injected into an inspection zone (Z) and the received signals are picked up and time reversed in order to constitute reference excitation signals; a second training stage in which the reference excitation signals are emitted simultaneously and the resulting diverging signals are picked up in order to constitute reference response signals; and a stage of inspecting the mechanical structure (2), in which the reference excitation signals are emitted, the resulting diverging signals are picked up, and the diverging signals are compared with the reference response signals.Type: GrantFiled: July 3, 2012Date of Patent: April 26, 2016Assignee: 01DB-METRAVIBInventors: Pascal Vouagner, Jean-Louis Guyader, Jacques Charvin
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Publication number: 20160041068Abstract: A sensor unit is configured as a single body, removably mounted in its entirety to a test point location on a machine so machine vibrations propagate into the single body. Within are an accelerometer, circuit board, wireless interface, signal processor, and battery. The sensor unit transmits sensor data wirelessly in real time to a data collection unit. A technician with data collection unit in hand goes from machine to machine, along a route of multiple test point locations on multiple machines, mounting and dismounting the sensor unit and collecting machine vibration data. The sensor unit is configured to reduce frequency response impacts of the mass and volume of the circuit board, wireless interface, signal processor, and battery on dynamic behavior of the sensor unit with respect to machine vibrations to achieve a frequency response rating comparable to a wired sensor.Type: ApplicationFiled: August 5, 2014Publication date: February 11, 2016Applicant: 01dB-METRAVIB, Société par Actions SimplifiéeInventors: Bertrand Wascat, Philippe Poizat, Patrick Labeyrie, Thierry Mazoyer
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Publication number: 20160041070Abstract: Automatic fault diagnosis is performed on vibration data sensed from a machine. A set of faults to screen for is identified from the machine configuration. For each fault there are characteristic symptoms. For each characteristic symptom, there is a corresponding indication used to diagnose the symptom. The indications are based on analyses of the current vibration data. The diagnosed symptoms have weights assigned according to a Bayesian network, and are used to derive a Bayesian probability for the fault. A fault having a Bayesian probability exceeding a threshold value is identified as being present in the machine. For each fault a confidence level is derived. The confidence level for a first fault is based on a similarity between characteristic symptoms for the first fault and characteristic symptoms for each one of the other faults being screened.Type: ApplicationFiled: August 5, 2014Publication date: February 11, 2016Applicant: 01dB-METRAVIB, Société par Actions SimplifiéeInventors: Bertrand Wascat, Guillame Lavaure, Kamel Mekhnacha, Patrick Labeyrie, Thierry Mazoyer
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Patent number: 6886393Abstract: The invention relates to an installation for implementing a method for detecting a deposit (D) that might form inside a fluid transport pipe (2). According to the invention, the installation comprises: at least one production source (3) for producing a thermal gradient, the source being for mounting on an “active” zone (Za) of the outside surface of the pipe; at least one measurement sensor (7) for measuring heat flux, the sensor being for mounting on a zone (Zm) of the outside surface of the pipe situated relative to the active zone at a given distance in consideration of the length of the pipe; and control and monitoring means (5) connected to the production source (3) and to the measurement sensor (7), and adapted to detect when the heat flux corresponding at least in part to the applied thermal gradient and transmitted by the pipe exceeds a determined threshold indicative of the presence of a deposit inside the pipe.Type: GrantFiled: September 27, 2000Date of Patent: May 3, 2005Assignees: 01 dB Metravib, Institut Francais du PetroleInventors: Thierry Romanet, Jean-Luc Volle, Jean Daniel Reber