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| Number | Title | Issue Date |
| 8056417 | Torque oscillation monitoring A method of detecting and monitoring torsional oscillation in a mechanical coupling between a prime mover and a multiphase alternating current (AC) electrical generator, comprises the steps of: detecting in at least one received signal variations that are indicative... | 11/15/2011 |
| 7528356 | Method and system for optical distance and angle measurement A contactless precision, optical distance and angle measurement method and system optically measuring the position of a moveable object, the bending of the object, the torque applied to the object and the object's rotational velocity. The present invention includes ... | 05/05/2009 |
| 7415363 | High resolution torque measurement on a rotating shaft with movement compensation An apparatus for determining the torque imposed on a rotatable shaft. The shaft has at least four paired probes, paired horizontal probes and paired vertical probes. The horizontal probes are positioned 90 degrees apart from the vertical probes. If the shaft moves h... | 08/19/2008 |
| 7380457 | Mechanical retainer for SAW torque sensor button A device for mounting a sensor on a device being subjected to torque such as a shaft or plate in the form of a retaining ring having an opening or chamber sized to hold the sensor. The ring has a first open end for insertion of the sensor into the chamber or opening... | 06/03/2008 |
| 7347106 | Torque sensor with inverted sensing element and integral shaft housing Torque sensing methods and systems are disclosed. In general, a sensing element and a sensor housing can be provided for maintaining the sensing element. A plurality of wirebond posts can be assembled perpendicular to a plane of the sensing element. The sensing elem... | 03/25/2008 |
| 7302864 | Torque sensor A plurality of acoustic wave sensing devices can be provided, which are mechanically simulated for implementation upon a quartz wafer substrate. The quartz wafer substrate is appropriately etched to produce a quartz diaphragm from the quartz wafer substrate. A plura... | 12/04/2007 |
| 7265336 | Encoder utilizing a reflective cylindrical surface An encoder for measuring the position of a rotating shaft is disclosed. The encoder includes a drum having an encoding track thereon and a detector module having a light source and a photodetector. The drum includes a cylindrical surface characterized by an axis, th... | 09/04/2007 |
| 7252018 | Drive for closure elements A drive for closure elements is provided, in particular in the area of garage and industrial doors, but also for example in the form of roller shutters, with a reference value generator arranged in the motor or in the gearing of the drive for determining the actual ... | 08/07/2007 |
| 7242481 | Laser vibrometry with coherent detection An optical system provides information about tangential vibration components of a surface at remote location. The optical system includes a light source assembly that emits first and second beams, each having one or more wavelengths and one or two polarizations. The... | 07/10/2007 |
| 7213461 | Torsional shaker apparatus for inspecting rotatable power generation machinery Apparatus for applying torsional vibration to a rotating machine is provided. In one exemplary embodiment the apparatus includes a permanent magnet machine (12) connected to the rotating machine (22) and configured to generate a three-phase AC output v... | 05/08/2007 |
| 7165455 | Surface acoustic wave sensor methods and systems Sensor systems and methods are disclosed herein, including a sensor chip, upon which at least two surface acoustic wave (SAW) sensing elements are centrally located on a first side (e.g., front side) of the sensor chip. The SAW sensing elements occupy a common area ... | 01/23/2007 |
| 7152476 | Measurement of motions of rotating shafts using non-vibrating contact potential difference sensor An apparatus having a non-vibrating contact potential probe. The non-vibrating contact potential probe is capable of measuring the chemical and geometrical irregularities on a rotating shaft. The chemical and geometrical information can be used to determine various ... | 12/26/2006 |
| 7117754 | Torque ripple sensor and mitigation mechanism A torque ripple sensor and method for torque ripple sensing and/or mitigation. A piezoelectric sensor is positioned relative to a motor so that torque fluctuations due to torque ripple of the motor are transmitted to the sensor, resulting in strain of a piezoelectri... | 10/10/2006 |
| 7117744 | Apparatus and method for detecting vibrations of the shaft assembly in an electrical machine A method for detecting vibrations of a shaft of an electrical machine includes measuring at least one of a shaft voltage and a shaft current and analyzing the measured at least one of the shaft voltage and the shaft current so as to determine the vibrations. In addi... | 10/10/2006 |
| 7104133 | Torsional vibration measuring instrument A torsional vibration measuring instrument has a plurality of reflecting means (6, 7) arranged with stipulated intervals along surface of a rotator (5) of which torsional vibration is to be measured; a pulse light irradiating means (1, 2) for ir... | 09/12/2006 |
| 7102379 | Apparatus and method for monitoring and/or analysis of electrical machines during operation An apparatus and a method for monitoring and/or analysis of electrical machines during operation, wherein the electrical machine has at least one generator with a shaft and drive means for driving this shaft, wherein the shaft is grounded at the first end of the gen... | 09/05/2006 |
| 7082821 | Method and apparatus for detecting torsional vibration with a downhole pressure sensor A method and apparatus for detecting torsional vibration, or stick-slip, in a drill string while drilling is described. The method comprises sampling a downhole pressure sensor and using embedded filter schemes and algorithms to determine, based on the pressure samp... | 08/01/2006 |
| 7080564 | Vibratory transducer To conduct a fluid, the transducer has a flow tube which in operation is vibrated by an excitation assembly and whose inlet-side and outlet-side vibrations are sensed by means of a sensor arrangement. To produce shear forces in the fluid, the flow tube is at least i... | 07/25/2006 |
| 7077014 | Vibration-type measuring transducer For conveying a fluid, the measuring transducer is equipped with a measuring tube, which is held oscillatably in a support element and vibrates during operation. The measuring tube executes, during operation, at least over part of its length, driven by an exciter ar... | 07/18/2006 |
| 7059191 | Determining defective devices which generate sound during operation Determining whether a device is defective by analyzing the sound signals generated by the device. Digital samples are generated to represent the sound signals. Digital samples are transformed from the time domain to the frequency domain to generate a frequency spect... | 06/13/2006 |
| 7044004 | Apparatus and method for applying optical stripes for torsional detection The present invention provides a method and apparatus for applying a uniformly-distributed pattern of stripes (8) on a component (6) of a large rotary machinery, such as an industrial generator. A method is provided that comprises measuring the circumf... | 05/16/2006 |
| 7043376 | Vibration measurement apparatus and method An apparatus for measuring vibration in a article having a rotating member. A motion sensitive transducer produces a time domain analog signal in response to the vibration. An analog-to-digital data acquisition member samples the transducer signal and produces a tim... | 05/09/2006 |
| 7026943 | Acoustic wave ice and water detector An acoustic wave sensor utilizes one or more acoustic waves trapped in an acoustic wave cavity to detect the presence of one or more substances on a surface of the acoustic wave cavity. To detect the presence of ice, a trapped torsional acoustic wave is used. To det... | 04/11/2006 |
| 7019520 | Method and system for torsional wave inspection of heat exchanger tubes The invention provides an improved method and device for inspecting heat exchanger tubes from within the tube inside diameter that overcomes the shortcomings of the prior art. It adapts a guided-wave probe approach that makes use of a torsional wave mode instead of ... | 03/28/2006 |
| 7013233 | Method and device for the detection of the movement of an element The invention proposes a method for detecting the motion of an element relative to a sensor device, in which signals (7 to 15) are evaluated as a function of a pulse generator (1) that is moved past the sensor (3, 4, 5). The signals (7... | 03/14/2006 |
| 6998631 | Dual-headed, adjustable optoelectronic image reader An optoelectronic sensing device detects two contrasting marks arranged next to each other along two reading tracks on a moving web. An optical head is arranged above each reading track. Each head has a lighting source and a lens, by means of which the contrast mark... | 02/14/2006 |
| 6935193 | Device for measuring the angle and/or the angular velocity of a rotatable body and/or the torque acting upon said body A device for measuring an angle and/or the torque acting on a rotatable body is proposed according to the invention, whereby the rotational angle is detected by means of magnetic or optical sensors. In particular, in a preferred exemplary embodiment, two devices ( | 08/30/2005 |
| 6925879 | Vibration analyzer and method A tool and method to identify a defect in a vehicle through a vibration frequency is provided. To identify the defect in a vehicle, a sensor senses a vibration frequency and generates a signal in response to the vibration frequency. In addition, a signal spectrum an... | 08/09/2005 |
| 6901815 | Engine torque sensor An optical sensing system is used to measure engine torque. A pair of patterns are formed on a driveshaft between a transmission and axle differential. The patterns are spaced apart from one another by a predetermined distance and are formed about the circumference ... | 06/07/2005 |
| 6876715 | Measurement system of torsion vibration for reactor internal pump Object of this invention is to provide an axial torsional vibration measurement device of the reactor internal pump capable of measuring the axial torsional vibration easily. The vibration detector 2 that detects vibration in the radial direction, and the sou... | 04/05/2005 |
| 6840109 | Vibratory transducer To conduct a fluid, the transducer has a flow tube which in operation vibrated by an excitation assembly. Inlet-side and outlet-side vibrations of the flow tube are sensed by means of a sensor arrangement. To produce shear forces in the fluid, the flow tube is at le... | 01/11/2005 |
| 6817246 | Distortion detector A device for detecting different conditions of a component, such as distorted conditions, movements and loaded conditions. Said device comprises a transmitter and a receiver which are located independently on at least one component at a distance from one another and... | 11/16/2004 |
| 6799140 | Detector for monitoring rotation A detector for monitoring rotation of a target includes a sensor unit, a microcontroller, and an operator conversation apparatus. The operator conversation apparatus is connected to the microcontroller and enables setting of the detector in a working mode or a learn... | 09/28/2004 |
| 6792811 | Method and system for measuring vibration of an object A method and system are provided for measurement of vibration of an object utilizing a non-contact imaging sensor such as a video camera. An object which does not already have a pair of spaced-apart marks is marked with two parallel lines spaced apart from one anoth... | 09/21/2004 |
| 6751281 | Measurement system of torsion vibration for reactor internal pump Object of this invention is to provide an axial torsional vibration measurement device of the reactor internal pump capable of measuring the axial torsional vibration easily. The vibration detector 2 that detects vibration in the radial direction, and the sou... | 06/15/2004 |
| 6675653 | Method and system for detecting drive train vibrations A method and system for detecting drive train vibration. The system includes a programmable controller programmed to generate an output signal based on information from a wheel sensor located to sense the rotational behavior of an individual wheel. The co... | 01/13/2004 |
| 6672169 | Performance measuring system and method for analyzing performance characteristics of rotating shafts A performance measuring system for a rotating shaft comprises a first annular support assembly to be coupled adjacent to a first end of a rotating shaft inwardly of associated shaft bearings. A second annular support assembly is to be coupled adjacent to ... | 01/06/2004 |
| 6644101 | Rheometer for rapidly measuring small quantity samples The present invention relates to a miniature rheometer, a parallel rheometer, and improved force sensor elements which may advantageously be used in combination with the miniature rheometer and the parallel rheometer. The miniature rheometer is adapted to... | 11/11/2003 |
| 6564168 | High-resolution optical encoder with phased-array photodetectors Embodiments of high-resolution optical encoders having phased-array photodetectors and integrated on semiconductor chips. Emitters, detectors, and encoders disks are described which can be easily produced with semiconductor processes, such as a detector a... | 05/13/2003 |
| 6426497 | Method and system for optical distance and angle measurement A contactless precision, optical distance and angle measurement method and system optically measuring the position of a moveable object, the bending of the object, the torque applied to the object and the object's rotational velocity. The present inventio... | 07/30/2002 |
