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| Number | Title | Issue Date |
| 7975554 | Wireless strain sensors, detection methods, and systems A strain sensor comprises a transmitting element; a receiving element wirelessly coupled to the transmitting element; and a modulating element located on a rotating component, wherein the modulating element modulates the wireless coupling between the transmitting el... | 07/12/2011 |
| 7849752 | Method and system for passive wireless strain gauge A system and method of using a passive wireless gauge to detect the physical properties on an object. ... | 12/14/2010 |
| 7441463 | Sensing system based on multiple resonant electromagnetic cavities A system and a method for measuring properties and health of structures are disclosed. The system comprises a number of sensors connected to a single antenna. Each sensor has a body that defines an electromagnetic resonator. The electromagnetic resonator produces a ... | 10/28/2008 |
| 7412899 | MEMS-based monitoring A solution for monitoring a property of an object and/or an area using a Micro-ElectroMechanical Systems (MEMS)-based monitoring device is provided. In an embodiment of the invention, the MEMS-based monitoring device includes a MEMS-based sensing device for obtainin... | 08/19/2008 |
| 7368827 | Electrical assembly for monitoring conditions in a combustion turbine operating environment An electrical assembly for use in various operating environments such as a casing of a combustion turbine 10 is provided. The assembly may include an electrical energy-harvesting device 51 disposed in a component within the casing of the turbine to con... | 05/06/2008 |
| 7347101 | Measuring strain in a structure using a sensor having an electromagnetic resonator The system (10) comprises a sensor (18) 90×90×90×30 mm as an electromagnetic microwave cavity (20) with a coupler (22) with a wire (40) and an antenna (42). Cavity (20) produces a response signal (26) in res... | 03/25/2008 |
| 7343265 | System to monitor the health of a structure, sensor nodes, program product, and related methods A system to monitor the health of a structure, health monitoring sensor nodes, program product, and associated methods are provided. The system includes an array of health monitoring sensor nodes connected to or embedded within a structure to monitor the health of t... | 03/11/2008 |
| 7330271 | Electromagnetic resonant sensor with dielectric body and variable gap cavity An electromagnetic resonant sensor has a dielectric sensor body through which electromagnetic wave energy is propagated. The sensor body has a cavity, with surfaces facing one another to define a gap that varies as a function of a parameter to be measured. The reson... | 02/12/2008 |
| 7248182 | Measurement system having at least one replaceable sensor A measurement system having an analyzer unit (2; 102) and at least one replaceable sensor (1; 101). Each sensor has a transponder (13) in which sensor-specific data is stored. The analyzer unit has an antenna (21) for wireless readout of ... | 07/24/2007 |
| 7219834 | System and method for tracking installed equipment and deploying spare parts There is disclosed a system and method of tracking installed equipment and deploying spare parts. In an embodiment, each piece of equipment may includes a unique electronic identifier configured to be accessible over a data network, and accessible locally via a RFID... | 05/22/2007 |
| 7182207 | System and process for break detection in porous elements for screening or filtering A detector for breaks in screens and filters employed in material separators includes a transmitter of RF signals and a receiver of RF signals located to either side of a screen. The separator includes a chamber having a barrier to RF signals with a path through the... | 02/27/2007 |
| 7166035 | Systems and methods for fitting golf equipment A golf equipment fitting system that uses advanced technology to not only objectively identify the optimum equipment for the golfer, but to also identify and help correct swing flaws so that the golfer can achieve optimum performance on the golf course. Thus, in one... | 01/23/2007 |
| 7162373 | Method and system for assessing life of cracked dovetail in turbine A method has been developed for predicting a remaining operational life of a turbine component including: obtaining crack flaw data regarding current crack flaws in the turbine component; using the crack flaw data with data regarding the structure and operating cond... | 01/09/2007 |
| 7047817 | Load measurement apparatus and methods utilizing torque sensitive link for pedal powered devices Apparatus and methods for use in measurement of applied load at a chainring assemblage of a pedal powered device are provided. The apparatus includes a link adapted for interposition between a chainring attachment site located on a conventional chainring mount, or s... | 05/23/2006 |
| 7050894 | System and method for diagnosing aircraft components for maintenance purposes Aircraft maintenance and repair work is facilitated, especially for a commercial aircraft, by a diagnostic system and method, wherein an aircraft component or assembly of components is monitored by at least one sensor which produces and preferably also stores compon... | 05/23/2006 |
| 6973838 | Non-contacting crack sensor A non-contacting sensor based on inductive coupling for detecting failure initiation, and crack propagation in composite materials is disclosed. A very low cost crack sensing transducer or test pattern that can be imbedded into a structural material, interrogated, a... | 12/13/2005 |
| 6952095 | Surface mounted and scanning spatially periodic eddy-current sensor arrays Inductive sensors measure the near surface properties of conducting and magnetic material. A sensor may have primary windings with parallel extended winding segments to impose a spatially periodic magnetic field in a test material. Those extended portions may be for... | 10/04/2005 |
| 6941869 | Sensor for monitoring electronic detonation circuits A voltage sensor (10) for monitoring electronic ignition circuits (1) which contains a plurality of igniters (4) connected to an ignition line (3) and an ignition device (2) connected to the ignition line (3) to program the ... | 09/13/2005 |
| 6941204 | System and method for diagnosing aircraft components for maintenance purposes Aircraft maintenance and repair work is facilitated, especially for a commercial aircraft, by a diagnostic system and method, wherein an aircraft component or assembly of components is monitored by at least one sensor which produces and preferably also stores compon... | 09/06/2005 |
| 6930489 | Device for the recognition of residual synchronization errors of multiple slats of flaps placed next to each other in aircraft A device for the recognition of residual synchronization errors of multiple slats or flaps placed next to each other in an aircraft. The device includes a current carrying wire that runs through the slats or flaps. This wire is fastened at one end in the area of the... | 08/16/2005 |
| 5969260 | Remotely interrogatable apparatus and method for detecting defects in structural members The apparatus and associated method of the present invention remotely detects structural defects in a workpiece by monitoring the electrical continuity of thin crack wires deposited on or within the workpiece in response to a communication from a remote i... | 10/19/1999 |
| 5433115 | Contactless interrogation of sensors for smart structures Apparatus for contactless interrogation of an sensor integrally disposed with a structure including a pair of coils for coupling signals across a gap between a sensing circuit having a sense coil and an interrogation circuit having an exciter coil connect... | 07/18/1995 |
| 4813320 | Method and apparatus for detecting a sheet strip material misfeed condition A plurality of individual frames or stampings provided in a sheet strip material by a stamping device are passed in proximity to a sensing device. As each individual frame or stamping is passed in proximity to the sensing device, the sensing device provid... | 03/21/1989 |
| 4803886 | Chain pull analyzer system A chain pull analyzer system including a telemetry unit for sensing the strain experienced by the chain while under load and in operation and for transmitting a radio frequency signal proportional to the strain and a data unit for receiving the radio freq... | 02/14/1989 |
| 4777477 | Surveillance alarm-security system An alarm-security system for maintaining surveillance of an individual. When unauthorized departure of an individual from a defined secure area is detected, the alarm-security system generates departure signals which are transmitted to a control center wh... | 10/11/1988 |
| 4757721 | Torque transducers A torque transducer has a torque transformable shaft 2 with strain guages 10, 12 electrically connected to sliprings 58 separated by spacers 60. A torque related signal is transmittable via the sliprings to a brush arrangement 22 having flexible strips 24... | 07/19/1988 |
| 4741217 | Magnetic field coupling circuit and rotary transducer using same An improved electromagnetic coupling circuit (16) is provided that features a rotor (18) carrying rotary windings (39) rotated by a rotary member (2) within an annular air gap (41) between two magnetic stator sections (34, 34') in which are disposed stato... | 05/03/1988 |
| 4651571 | Strain sensor A strain sensor includes a quartz crystal element 9 having a resonant frequency which is dependent on strain imposed on it. The crystal element 9 is caused to vibrate at its resonant frequency by pulses of light transmitted along an optical fibre 5 from a... | 03/24/1987 |
| 4610168 | Variable magnetic field coupling circuit and rotary transducer using same An improved rotary transducer (60) featuring a rotary member (2) rotatably mounted in a housing (4). Member (2) is preferably provided with a section (8) adapted to enhance measurement of stresses or other parameters of interest imposed upon member (2) un... | 09/09/1986 |
| 4567451 | Resonator having optical feedback coupling A resonator device comprises an elastic beam driven electrostatically at its natural frequency, or an harmonic thereof, by voltage pulses applied to an integral paddle member. The voltage pulses are derived from optical pulses fed via an optical fibre and... | 01/28/1986 |
| 4566339 | Chain pull monitor system A system for monitoring and recording the tensile stresses experienced by a moving conveyor chain while in use and under load. The system uses strain gauge, signal conditioning and radio technologies to produce an audio signal remote from the actual conve... | 01/28/1986 |
| 4084429 | Power tong apparatus An improved power tong apparatus having power means for supplying rotative forces to a first tubular member in order to make or break a connection between such tubular member and a second tubular member and for measuring and displaying the torque supplied... | 04/18/1978 |
| 4062227 | CW ultrasonic bolt tensioning monitor This invention is a CW ultrasonic device for measuring frequency shifts of the peak of a mechanical resonance in a body. One application of the device is measuring the strain in a bolt. It also has other applications such, for example, as measuring the th... | 12/13/1977 |
| 4048850 | Mechanism for gauging the catch within a trawl net The present invention is related to a mechanism for guaging the expansion of a trawl net in correspondence with the number of fish caught within the trawl. The mechanism includes sensors adapted to be fastened to the masks of the trawl net in order to sen... | 09/20/1977 |
