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| Number | Title | Issue Date |
| 7647837 | Active temperature differential compensation for strain gage based sensors An active temperature differential compensation for strain gage based sensors. An array of temperature sensors can be placed at the gage locations to measure the difference in temperature that induces strain on the strain gages. The output of the temperature sensor ... | 01/19/2010 |
| 7624645 | Compensation apparatus The invention relates to a compensation apparatus for compensating for thermally induced relative axial positional changes between two components, having a first compensation part which brings about an axial temperature-compensating movement of one of the compensati... | 12/01/2009 |
| 7487683 | Endurance testing apparatus An endurance testing apparatus, which is for performing an endurance test of a contacting/separating portion in which a first member and a second member repeats contacting with and separating from each other, has a contact load generator and a testing medium fluid s... | 02/10/2009 |
| 7367237 | MEMS vascular sensor A micromachined sensor for measuring vascular parameters, such as fluid shear stress, includes a substrate having a front-side surface, and a backside surface opposite the front-side surface. The sensor includes a diaphragm overlying a cavity etched within the subst... | 05/06/2008 |
| 7362197 | Temperature compensation for silicon MEMS resonator Thermally induced frequency variations in a micromechanical resonator are actively or passively mitigated by application of a compensating stiffness, or a compressive/tensile strain. Various composition materials may be selected according to their thermal expansion ... | 04/22/2008 |
| 7360439 | Sample resistance measurement device In a circuit, as the bridge resistance of one side of a Wheatstone bridge circuit, a distortion gauge (fixed reference resistance) of which variation caused by environmental conditions is suppressed and a sample having a resistance component ΔR varied by the enviro... | 04/22/2008 |
| 7357036 | Force measuring apparatus and strain measuring element A force measuring apparatus comprises has a force-transmitting component, that holds a strain measuring element with a carrier element and a displacement transducer. The carrier element has two fixing sections at a predefined distance from each other in a direction ... | 04/15/2008 |
| 7353712 | Integrated circuitry and method for manufacturing the same The integrated circuitry on a semiconductor substrate includes an integrated circuit arranged in a circuit area of the semiconductor substrate and a stress-sensitive structure on the semiconductor substrate for detecting a mechanical stress component in the semicond... | 04/08/2008 |
| 7331242 | System for testing paving materials A system for measuring the critical temperatures for thermal cracking of asphalt binders. The exemplary embodiment comprises a metal ring, at least one strain gauge attached to the inner surface of the ring, an environmental chamber, and a data acquisition system. A... | 02/19/2008 |
| 7325456 | Interrogation network patches for active monitoring of structural health conditions Apparatus for monitoring structural health conditions of structures. The apparatus includes a piezoelectric device that has a bottom cover plate, piezoelectric rings concentrically disposed with respect to an axis and positioned on the bottom cover plate, and concen... | 02/05/2008 |
| 7324007 | Instrumented rock bolt, data logger and user interface system A rock bolt includes a hollow body and a gap along a length of the hollow body. At least one strain gauge is affixed to an inner surface of the rock bolt and is accessible from the gap. The rock bolt may include a data logger within the hollow body and coupled to re... | 01/29/2008 |
| 7318358 | Strain sensor that compensates for thermal strain A strain sensor includes a sensor body extending substantially in a plane. The sensor body is substantially symmetric in the plane about a first axis and a second axis that is perpendicular to the first axis. The sensor body includes a plurality of sensor body porti... | 01/15/2008 |
| 7311009 | Microelectromechanical systems contact stress sensor A microelectromechanical systems stress sensor comprising a microelectromechanical systems silicon body. A recess is formed in the silicon body. A silicon element extends into the recess. The silicon element has limited freedom of movement within the recess. An elec... | 12/25/2007 |
| 7299701 | Compressive fatigue and energy test apparatus and method for testing clutch plate friction materials The present invention presents a means for simultaneously testing the compressive strength and measuring the thermal energy dissipated by a given friction material during slip. The testing apparatus includes a rotatable flywheel that rotates a transmission reaction ... | 11/27/2007 |
| 7292951 | Systems for compensating for creep and hysteresis in a load cell A method of compensating for hysteresis in a load cell, by: (a) pre-calibrating a load cell by: measuring load cell deflection under progressively increasing loads; determining a first set of coefficients correlating the deflection of the load cell to the measured l... | 11/06/2007 |
| 7281428 | Diagnostic system for monitoring structural health conditions Interrogation systems for monitoring structural health conditions. An interrogation system includes at least one wave generator for generating a wave signal and optical fiber sensors applied to a structure. The interrogation system also includes at least one electro... | 10/16/2007 |
| 7268566 | Active sensor circuit with one or more T-network pairs A sensor circuit is provided that includes at least one pair of interconnected T-networks. Each pair has a first T-network including a first impedance serially connected to second impedance at a first junction and a first variable resistance sensor element connected... | 09/11/2007 |
| 7260989 | Sensor signal processing system and detector A detector is made up of a semiconductor integrated circuit in a part, and the semiconductor integrated circuit includes a driving circuit, an AC amplifier, a detection circuit and an amplifier circuit. An input resistor that is connected to input terminals of an op... | 08/28/2007 |
| 7255010 | Integrated circuitry and method for manufacturing the same The integrated circuitry on a semiconductor substrate includes an integrated circuit arranged in a circuit area of the semiconductor substrate and a stress-sensitive structure on the semiconductor substrate for detecting a mechanical stress component in the semicond... | 08/14/2007 |
| 7254896 | Inner bearing split axle assembly A split axle assembly for obtaining gage measurements of a track including a first wheel with a first split axle, a second wheel with a second split axle, a first bearing for rotatably receiving the first split axle, and a second bearing for rotatably receiving the ... | 08/14/2007 |
| 7239123 | Multiplexed dual-purpose magnetoresistive sensor and method of measuring current and temperature The present invention determines temperature and current from resistance measurements of a single magnetoresistive sensor. A dual-purpose sensor includes the magnetoresistive sensor having a single pair of terminals. The sensor is multiplexed under separate current ... | 07/03/2007 |
| 7224257 | Physical quantity sensing element having improved structure suitable for electrical connection and method of fabricating same A physical quantity sensing element according to the invention includes an insulating layer and a sensing layer. The sensing layer is configured to generate an electrical signal as a function of a physical quantity applied thereto and has a surface that includes a f... | 05/29/2007 |
| 7216554 | Physical quantity sensor having enhanced temperature compensation capability A physical quantity sensor according to the invention includes a first member, a second member, a sensing member, a temperature detector, a correcting circuit, and a heat conduction path thermally connecting the sensing member and the temperature detector. The sensi... | 05/15/2007 |
| 7213477 | Quick disconnect interface for environmental testing An apparatus (10) tests different products (15). The apparatus (10) includes an environmental chamber (20) for providing thermal shock to the products (15), a conveyor (40) for transporting the products (15) through t... | 05/08/2007 |
| 7210332 | Mechanical resonator A sensor and methods for making and using the same in which a mechanical resonator is employed, comprising a resonator portion for resonating in a fluid without the substantial generation of acoustic waves; and an electrical connection between the resonator portion ... | 05/01/2007 |
| 7202761 | Temperature compensation for silicon MEMS resonator Thermally induced frequency variations in a micromechanical resonator are actively or passively mitigated by application of a compensating stiffness, or a compressive/tensile strain. Various composition materials may be selected according to their thermal expansion ... | 04/10/2007 |
| 7197931 | Sensors for monitoring structural health conditions Sensors and systems for monitoring structural health conditions. The present invention provides a device for monitoring structural health conditions including a dielectric substrate, a piezoelectric device for actuating and/or sensing Lamb waves, a molding layer dep... | 04/03/2007 |
| 7168974 | Three phase lighted plugs and connectors for indicating the absence of at least one phase Indicator means located in a plug or connector indicates when at least one phase of an AC multi-phase voltage is absent. The indicator means can be any one of a variety of light sources and/or an audible generator. The light source can be, for example, an LED, an il... | 01/30/2007 |
| 7146862 | Thick film strain gage sensor A strain gage sensor having improved operational aspects and lower production costs. The strain gage sensor includes two active resistors, two passive resistors, and a structure for minimizing strain experienced by the two passive resistors. The active and passive r... | 12/12/2006 |
| 7132838 | Active sensor circuit with one or more T-network pairs A sensor circuit is provided that includes a first T-network including a first impedance serially connected to a second impedance at a first junction and a first variable resistance sensor element connected at a first end to the first junction and at a second end to... | 11/07/2006 |
| 7126355 | Physical quantity sensing device with bridge circuit and temperature compensating method A physical quantity sensing device includes an AC voltage generator for generating an AC voltage and a bridge circuit that has first and second input points, to which the AC voltage is applied, and first and second output points connected to a differential amplifier... | 10/24/2006 |
| 7119549 | Output calibrator with dynamic precision An integrated circuit device having an output driver circuit and a control circuit. The output driver circuit outputs a first signal having a signal level according to a control value. The control circuit is coupled to receive the first signal from the output driver... | 10/10/2006 |
| 7104125 | Internal riser inspection device and methods of using same An inspection apparatus includes an inspection unit that is lowered into vertically supported pipe filled with seawater. The apparatus includes a pipe weld location detector module carried by the inspection unit. The apparatus also includes a rotating time of flight... | 09/12/2006 |
| 7104138 | Strain detector A strain detector includes an insulating substrate, a power electrode, output electrodes and a ground electrode which are disposed over the insulating substrate, a strain-resistance element provided over the insulating substrate and coupled to the power electrode, t... | 09/12/2006 |
| 7082822 | Internal riser inspection device and methods of using same An inspection apparatus includes an inspection unit that is lowered into vertically supported pipe filled with seawater. The apparatus includes a pipe weld location detector module carried by the inspection unit. The apparatus also includes a rotating time of flight... | 08/01/2006 |
| 7077016 | Load sensor A load sensor includes a resilient member including a stationary segment, a load-receiving segment extending outward from the stationary segment, and an arm segment between the load-receiving segment and the stationary segment. Moreover, first and second strain-sens... | 07/18/2006 |
| 7071793 | Temperature compensation for silicon MEMS resonator Thermally induced frequency variations in a micromechanical resonator are actively or passively mitigated by application of a compensating stiffness, or a compressive/tensile strain. Various composition materials may be selected according to their thermal expansion ... | 07/04/2006 |
| 7055365 | Load sensor and seat weight measuring apparatus with a plurality of strain gauges A load sensor hardly causing error in weight measurement even when the environmental temperature of the load sensor varies, and a seat weight measuring apparatus using the load sensor. The sensor includes a plurality of strain gauges form a bridge circuit. The strai... | 06/06/2006 |
| 7052174 | Device for determining changes in dimension due to temperature fluctuation An apparatus for non-destructively testing the response of a specimen to temperature change. An embodiment temperature cycles a specimen, such as a wet mortar beam, dynamically measuring change in dimension and the temperature of the specimen during the cycle. Among... | 05/30/2006 |
| 7050943 | System and method for processing operation data obtained from turbine operations A system and method are provided for monitoring the operation of a plurality of turbines in respective operating locations. The method includes inputting operation data from each of the turbines and processing the operation data to generate secondary operation data.... | 05/23/2006 |
