| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073100150 | Load cell (e.g., strain gauge or piezoelectric sensor) | 44 |
| 20080209979 | Method for Calibrating a Sensor System of a Measuring Bearing for a Storage Installation - The invention relates to a method for calibrating a sensor system of at least one measuring bearing for a bearing installation, said method being used to adjust individual measured values of an individual bearing installation using representative reference values of a reference installation. | 09-04-2008 |
| 20080216554 | Downhole Load Cell - A downhole load cell calibrated for enhanced accuracy. The load cell may be a dry load cell calibrated by storage of pre-determined temperature and pressure data relative to the load cell based on known loads applied thereto. Thus, surface equipment employed with the load cell may include a computer program that takes advantage of the stored pre-determined information. The computer program may then be employed for calibration of downhole load cell data based on readings from the load cell along with downhole temperature and pressure information. | 09-11-2008 |
| 20080264142 | Method and Drive for Influencing the Mechanical Load-Bearing Capability and/or Loading of a Technical Structure - A method and a device are described for influencing the mechanical load-bearing capability and/or loading of a technical structure. | 10-30-2008 |
| 20090255321 | DYNAMIC CALIBRATION ASSEMBLY FOR A FRICTION STIR WELDING MACHINE - A calibration assembly for a friction stir welding machine having a rotatable pin tool with upper and lower shoulders. The calibration assembly includes: a force measuring component for placement between the upper and lower shoulders of the pin tool; an upper bearing for placement between the upper shoulder of the pin tool and the force measuring component for permitting relative rotation therebetween; and a lower bearing for placement between the lower shoulder of the pin tool and the force measuring component for permitting relative rotation therebetween. The upper and lower bearings permit the pin tool to be rotated relative to the force measuring component during a calibration procedure. This permits the force measuring component to measure the forces directly applied by the pin tool while the upper and lower shoulders are either stationary or rotated relative to the force measuring component. | 10-15-2009 |
| 20090266138 | Method and Apparatus for Shear Strain Testing of Strain Sensors - A method and apparatus for testing, evaluating, and/or calibrating strain sensors. A test beam ( | 10-29-2009 |
| 20100064765 | Apparatus and method for material testing of microscale and nanoscale samples - Methods and apparatus for testing a microscale or nanoscale sample. A testing stage comprises a frame having first and second laterally opposing ends and first and second side beams. At least one deformable force sensor beam is disposed near the first opposing end and extends laterally between the first and second side beams. A first longitudinal beam, having a free end, bisects the at least one force sensor beam, and a second longitudinal beam has a free end facing the free end of the first longitudinal beam to define a gap therebetween. A support structure comprises a plurality of laterally extending beams disposed such that the second longitudinal beam bisects the plurality of laterally extending beams. Each of a pair of slots disposed at each of the free ends of the first and second longitudinal beams comprises a tapered portion leading to a generally longitudinal portion aligned with the central longitudinal beam. The slots provide a seat for a dogbone-shaped sample. | 03-18-2010 |
| 20100139359 | SPRING FORCE COMPONENT TESTER - A spring force component tester for determining a load distribution on each end of a spring of generally cylindrical shape using three, mutually-parallel load cells. One tester includes a lower plate and an upper plate movable with respect to the lower plate. Each plate includes a plurality of recesses and a load cell positioned in each recess. Each plurality of recesses is positioned such that a center of each recess is a point on a circle coaxial to the plate. The tester also includes a data logger that obtains and stores load cell outputs from the load cells and spring tester electronics that obtain height measurements of the upper plate and send a trigger signal to a computer. The computer executes application software when the computer receives the trigger signal that reads the load cell outputs stored in the data logger, and calculates a spring force acting along the spring axis between approximately 0.5 Newton and 100 Newton. | 06-10-2010 |
| 20100281944 | METHOD AND DEVICE FOR CALIBRATING ACCELERATION AND FORCE SENSORS - The stimulation of waves in bars, in particular at high amplitudes, is used for the calibration of acceleration and force sensors. The invention relates to a method and a device for calibrating acceleration and force sensors by means of a Hopkinson bar for controlled influencing of the signal form the signal amplitude and the pulse duration of the signals over a large amplitude range. A reference sensor and the sensor for calibration are arranged on the Hopkinson bar. At the end of the Hopkinson bar opposite the sensors the stimulation is carried out by means of an electromechanical actuator for converting an electrical signal into a mechanical force. The electromechanical actuator may be controlled by a control and regulation electronic circuit. A targeted influence and change in the acceleration and force pulse form can be achieved. | 11-11-2010 |
| 20100288012 | APPARATUS FOR TESTING BONDING STRENGTH OF ELECTRICAL CONNECTIONS AND FRICTIONLESS CALIBRATION DEVICE FOR THE SAME - An apparatus for testing bonding strength of electrical connection comprises a platform including a two-axis drive, a device holder positioned on the two-axis drive and configured to receive an electronic device, a vertical drive positioned on the platform, a cantilever positioned on the vertical drive, and a test head connected in a rotational manner with the cantilever. A frictionless calibration device for shear force testing comprises a base, two supporters positioned on the base, a shaft having two tapering ends positioned between the two supporters, and a calibration member fixed on the shaft, wherein the shaft and the calibration member contact the supporters in a rotational manner. | 11-18-2010 |
| 20110113852 | OPTICAL FIBER SHAPE SENSOR CALIBRATION - Calibration methods and apparatuses for a shape sensing optical fiber are disclosed. Strain is sensed in an optical fiber that is associated with a kinematic chain, and information derived from the sensed strain is used to determine a calibration relationship between the fiber and the kinematic chain. The strain may be sensed at a plurality of angles between two links in the kinematic chain. The strain may be sensed in a segment of the optical fiber that is associated with a joint in the kinematic chain as the joint sweeps through an arc. The strain may be sensed for the optical fiber in a known, predefined bend shape. The calibration information is stored in memory for later use during operation of the kinematic chain, so that shape information from the optical fiber can be used to accurately indicate the shape or pose of the kinematic chain. | 05-19-2011 |
| 20120011917 | DEVICE AND METHOD FOR MEASURING STRAIN - A device for measuring strain on a surface of an object ( | 01-19-2012 |
| 20120079868 | Calibration method for multi-component force measuring spindle unit used in tire testing machine - A transformation matrix used for finding actual loads acting on a tire can be reliably calibrated. Using the calibrated transformation matrix, the translation and moment loads exerted on the tire can be calculated with a high degree of accuracy in a multi-component force measuring spindle unit including two multi-component force measuring sensors on locations spaced-apart from each other along the axis direction of a spindle shaft. The calibration method includes a step of measuring loads exerted on the spindle shaft, a calculation step using a measured load vector including the loads obtained in the measurement step and the transformation matrix applied to the measured load vector, to find an actual load vector including actual loads on the tire. Before the calculation step, a calibration step determines the measured load vector under a plurality of linearly independent test conditions and calibrates the transformation matrix based on the determined measured load vector. | 04-05-2012 |
| 20120111088 | WIND TUNNEL BALANCE CALIBRATOR - Provided are a wind tunnel balance calibrator capable of improving accuracy of attitude control of a wind tunnel balance, and a wind tunnel balance calibrator which can ensure a wide work space around the wind tunnel balance. A wind tunnel balance calibrator includes a load application mechanism for applying a load to a wind tunnel balance and an attitude restoration mechanism for restoring an attitude of the wind tunnel balance. The attitude restoration mechanism is constituted by a parallel-link mechanism including a support plate for supporting the wind tunnel balance, and actuators capable of displacing the attitude of the support plate with six degrees of freedom. | 05-10-2012 |
| 20120167657 | Test Stand with an Apparatus for Calibrating a Force-Measuring Device - A test stand encompasses a dynamometer, which is supported to oscillate about a main axis, from which a lever arm extends perpendicularly. For calibrating a force-measuring device, which is coupled to the lever arm, provision is made for a pneumatic cylinder as reference force-generating device. The reference force can be measured by a load cell and can be applied to the lever arm via a yoke. The force-measuring device, which is to be calibrated, the pneumatic cylinder, the load cell, and the yoke are disposed on the same side of the dynamometer and act on the same lever arm. | 07-05-2012 |
| 20130239649 | METHOD OF DETERMINING THE TENSION IN A MOORING LINE - A method of calibrating a tension meter arranged to measure the tension in a mooring line of a marine asset is described. The method comprises the step of determining at least one characteristic of the catenary trajectory formed by the mooring line, and determining the tension in the mooring line based on the at least one characteristic. The characteristic may be, for example, shape of the catenary trajectory or elastic response of the mooring line. The determined tension is compared with a corresponding tension measurement from the tension meter to allow the tension meter to be calibrated. The method may be carried out during normal operations of the marine asset, such as drilling or hydrocarbon production. Computer implemented methods are described, as are methods of deriving a position map of the mooring lines. The invention may be implemented in a real-time monitoring system which forms a long-term or permanent feature of the marine asset. | 09-19-2013 |
| 20130269412 | METHOD FOR SELF-MONITORING A CERAMIC PRESSURE MEASURING CELL OF A CAPACITIVE PRESSURE SENSOR AND EVALUATION CIRCUIT FOR CARRYING OUT SAID METHOD - A method for monitoring the operation of a pressure measuring cell ( | 10-17-2013 |
| 20130276510 | SELF CALIBRATING MICRO-FABRICATED LOAD CELLS - Self calibrating micro-fabricated load cells are disclosed. According to one embodiment, a self calibrating load cell comprises a resonant double ended tuning fork force sensor and a phase locked loop circuit for detection of frequency changes upon external load application to the resonant double ended tuning fork force sensor. | 10-24-2013 |
| 20130298633 | SYSTEM AND METHOD FOR THREE DIMENSIONAL CALIBRATION OF FORCE PLATES - A method for calibrating a force platform includes, providing a force platform and applying an nXm grid on a top surface of the force platform via a computing device. Next, applying p known loads on each of the nXm grid points of the top surface along a Z-axis being perpendicular to the X and Y axes and along the X and Y axes. Next, taking multipoint measurements at each grid point and for each applied known load along the X,Y and Z axes and generating six measured output signals, exact position coordinates and applied known load magnitude for each grid point. Next, assembling an array of nXmXp of six equations with six unknown for each grid point and applied known load and then solving the assembled equations and deriving a position and load specific calibration matrix for each grid point. | 11-14-2013 |
| 20130298634 | METHOD FOR OPERATING A WIND POWER PLANT - The present invention concerns a method of operating a wind power installation, wherein the wind power installation has an aerodynamic rotor in the form of a horizontal-axis rotor having a hub with at least one rotor blade, and provided on the rotor is at least one load measuring means for detecting a wind loading on the rotor, the method includes the steps: rotating the rotor of the wind power installation without or with a slight wind loading for calibration of the load measuring means and in that case recording a load measurement with the load measuring means, and calibrating the load measuring means based on the load measurement and previously known weight forces occurring at the rotor. | 11-14-2013 |
| 20130319073 | APPARATUS FOR MEASURING SHEARING FORCE UPON SITTING - Disclosed is an apparatus for measuring a shearing force upon sitting in a seat in a vehicle. The apparatus includes a shearing force sensor, a signal processor, and a monitoring device. The shearing force sensor is disposed in a compartment in a seat and senses the shearing force generated upon sitting on the seat. The signal processor filters and amplifies a signal from the shearing force sensor | 12-05-2013 |
| 20140060146 | COMPONENT PART AND METHOD FOR TESTING SUCH A COMPONENT PART - Measures are described which simplify the functional testing of a component having an MEMS element provided with a pressure-sensitive sensor diaphragm, and which allow a self-calibration of the component even after it is already in place, i.e., following the end of the production process. The component has a housing, in which are situated at least one MEMS element having a pressure-sensitive sensor diaphragm and a switching arrangement for detecting the diaphragm deflections as measuring signals; an arrangement for analyzing the measuring signals; and an arrangement for the defined excitation of the sensor diaphragm. The housing has at least one pressure connection port. The arrangement for exciting the sensor diaphragm includes at least one selectively actuable actuator component for generating defined pressure pulses that act on the sensor diaphragm. | 03-06-2014 |
| 20140102167 | FORCE PLATFORM - In one aspect, a force platform includes indicators at known locations with respect to applied forces used during the calibration of the force platform, the indicators being usable by a spatial measurement system to determine the location of the indicators in a coordinate system external to the force platform. | 04-17-2014 |
| 20140123726 | DEVICE FOR CLASSIFYING STRAIN GAUGES - A device for classifying strain gauges includes a holder capable of receiving strain gauges and capable of being rotated by a rotating device, the holder being connected to the rotating device by a linking device; and a heater capable of heating the holder and arranged about the mounting, the linking device including a cooling device capable of limiting the heating of the rotating device. | 05-08-2014 |
| 20140144206 | METHOD FOR OPERATING AN ABSOLUTE, OR RELATIVE, PRESSURE SENSOR HAVING A CAPACITIVE TRANSDUCER - A method for operating a pressure sensor, which includes a measuring membrane, at least one platform and a capacitive transducer having two pressure dependent capacitances between electrodes on the measuring membrane The measuring membrane divides a volume pressure-tightly into two volume portions, wherein the second volume portion is enclosed in a measuring chamber between the measuring membrane and the platform. A deflection of the measuring membrane depends on a pressure measurement variable p, which is a difference between a first pressure p | 05-29-2014 |
| 20140208821 | In-Situ System Calibration - A method for re-calibrating installed downhole sensors used in hydrocarbon wells by the application of a calibration string inserted in the wells and deployed in close proximity to the installed downhole sensor. | 07-31-2014 |
| 20140208822 | Apparatus and Method for Automatic Detection of Diaphragm Coating or Surface Contamination for Capacitance Diaphragm Gauges - A system and a method detect contamination of a diaphragm in a capacitance diaphragm gauge wherein a contaminated diaphragm deflects less in the presence of pressure than an uncontaminated diaphragm. The system and method measure a base pressure. A DC voltage is applied between the diaphragm and a fixed electrode to cause the diaphragm to deflect to simulate an effective pressure. The system and method measure a combined pressure caused by the base pressure and the effective pressure. The system and method subtract the base pressure to determine the effective pressure caused by the static diaphragm deflection. If the measured effective pressure is less than an acceptable effective pressure, the system and method determine that the diaphragm is contaminated. | 07-31-2014 |
| 20140298881 | METHOD FOR CALIBRATING STRAIN TRANSDUCERS - A method for calibrating strain transducers mounted to a power shovel may include the steps of: Calculating at least one member joint load for a known loading condition when at least one member of the power shovel is in a statically determinate configuration; determining a calculated shear force and a calculated normal force in the member of the power shovel based on the calculated member joint load; measuring a strain in the member; determining a measured shear force and a measured normal force for the member based on the measured strain; and determining a calibration constant from the calculated shear and normal forces and the measured shear and normal forces. | 10-09-2014 |
| 20150040640 | Base Load Estimation for a Combined Cycle Power Plant with Steam Turbine Clutch - Systems and methods for estimating a base load in a combined cycle power plant with a steam turbine clutch are provided. According to one embodiment of the disclosure, a system may include a controller and a processor communicatively coupled to the controller. The processor may be configured to receive operating parameters associated with a combined cycle power plant. The combined cycle power plant may comprise a gas turbine permanently coupled to a generator and a steam turbine selectively coupled to the generator via a clutch. The processor may be further configured to receive an engagement status associated with the clutch and receive first data and second data. Based on the engagement status, the processor may select the first data or the second data and use that to estimate a base load. The base load estimation may be calibrated based on the operating parameters. | 02-12-2015 |
| 20150047412 | SYSTEM FOR MEASURING A PALMAR GRIPPING FORCE - The invention relates to a system for measuring a palmar gripping force, comprising a device ( | 02-19-2015 |
| 20150075250 | Force Sensor Device - A force sensor device has at least three arcs distributed around a central axis. The arcs have integrated sensing elements that measure strain applied on the arc resulting from a force applied on the central axis. | 03-19-2015 |
| 20150082858 | SYSTEMS AND METHODS FOR CALIBRATING A LOAD CELL OF A DISK BURNISHING MACHINE - Systems and methods for performing in situ testing of a load cell disposed within a disk burnishing machine are provided. One such system includes a load cell bracket attached to a component of the disk burnishing machine, where the load cell is mounted within the load cell bracket and has a force measuring surface. The load cell bracket can be oriented such that the force measuring surface faces a direction that is about opposite to a direction of gravity. The system can further include a preselected weight and a weight holder configured to receive the preselected weight, to be mounted to the load cell bracket, and to be aligned with the load cell. The preselected weight can be positioned within the weight holder and on the force measuring surface of the load cell. The load cell can then be tested, calibrated, and/or replaced if necessary. | 03-26-2015 |
| 20150114077 | SHEAR SENSOR ARRAY - The present disclosure relates to shear sensor arrays. In particular, the present disclosure relates to a floating element shear stress sensor array on a chip that is calibrated to high shear levels and is calibrated to determine the sensitivity to streamwise pressure gradients. | 04-30-2015 |
| 20150143868 | CALIBRATION METHOD FOR MULTI-COMPONENT FORCE DETECTOR PROVIDED IN ROLLING RESISTANCE TESTING MACHINE - The calibration method for a multi-component force detector is a calibration method for a multi-component force detector provided in a rolling resistance testing machine comprising a spindle to which a tire is mounted, and a traveling drum having a simulated traveling road surface against which the tire is pressed, wherein when processing for calculating force acting on the tire from the measurement value of the multi-component force detector using a crosstalk correction factor for correcting the influence of crosstalk occurring in the multi-component force detector is performed, a test is conducted using at least one or more reference tire the rolling resistance value of which is already known, and the crosstalk correction factor is calibrated using “rolling test data” composed of force measured by the multi-component force detector during the test using the reference tire, and the rolling resistance value of the reference tire used for the measurement. | 05-28-2015 |
| 20150346046 | PRESSURE SENSOR HAVING MULTIPLE PRESSURE CELLS AND SENSITIVITY ESTIMATION METHODOLOGY - A pressure sensor ( | 12-03-2015 |
| 20150355043 | Force Sensor with Compensation - Aspects of the present disclosure are directed to force sensors. As may be implemented in accordance with one or more embodiments, an apparatus includes a force-responsive component having a resonant frequency, and a circuit that compensates for variations with the force-responsive component. The force-responsive component moves in response to an applied force, in accordance with a spring constant that is susceptible to fluctuation. The compensation circuit determines Brownian motion of the force-responsive component at the resonant frequency based on temperature, and generates an output based on the determined Brownian motion and movement of the force-responsive component. Such an output is indicative of force applied to the apparatus. | 12-10-2015 |
| 20160011068 | In-Situ Load System for Calibrating and Validating Aerodynamic Properties of Scaled Aircraft in Ground-Based Aerospace Testing Applications | 01-14-2016 |
| 20160025529 | APPARATUS AND A SYSTEM FOR DETECTING A PHYSICAL VARIABLE - An apparatus for detecting a physical variable has a first sensor unit and a second sensor unit. The first sensor unit detects a physical variable on the basis of a first detection principle. Furthermore, the second sensor unit detects the physical variable on the basis of a second detection principle. In this case, the first detection principle differs from the second detection principle. The first sensor unit the second sensor unit are accommodated in a common housing. | 01-28-2016 |
| 20160096498 | LOAD OBJECT DETERMINATION APPARATUS - A load exerted on one of supporting parts supporting a seat of a vehicle is detected and is corrected according to an inclination of the vehicle. A load object on the seat is determined a plurality of times of turning on and turning off an ignition of the vehicle using the load thus corrected or the load detected. The load object is determined as an adult at least when the load is greater than or equal to a first threshold and determined as other than an adult at least when the load is less than a second threshold that is less than the first threshold. A function is further provided of determining the load object from a combination of a magnitude relation between the load and a third threshold less than or equal to the first threshold and greater than the second threshold and the inclination of the vehicle. | 04-07-2016 |
| 20160103035 | PRESSURE SENSOR WITH TESTING DEVICE AND RELATED METHODS - A pressure sensor is for positioning within a structure. The pressure sensor may include a pressure sensor integrated circuit (IC) having a pressure sensor circuit responsive to bending, and a transceiver circuit coupled to the pressure sensor circuit. The pressure sensor may include a support body having a recess therein coupled to the pressure sensor IC so that the pressure sensor IC bends into the recess when the pressure sensor IC is subjected to external pressure. | 04-14-2016 |
| 20160108720 | METHOD AND APPARATUS TO MEASURE BOREHOLE PRESSURE DURING BLASTING - A method of calibrating a pressure sensing apparatus for measuring borehole pressure during blasting operations is provided. The method includes: striking a first piezoelectric sensor of a first unmolded pressure sensing apparatus; determining, with an interference circuit, a first peak voltage of the first piezoelectric sensor during the striking thereof; striking a second piezoelectric sensor of a second molded pressure sensing apparatus; determining with the interference circuit, a second peak voltage of the second piezoelectric sensor during the striking thereof; and calculating a piezoelectric constant of the first piezoelectric from at least the first and second peak voltages. | 04-21-2016 |
| 20160109319 | METHOD AND APPARATUS OF MOMENT CALIBRATION FOR RESONANCE FATIGUE TEST - A moment calibration method and apparatus are provided for a resonance fatigue test of a test article. In the moment calibration method, when a load applying unit of the apparatus applies a static load to the test article in a first direction so as to cause bending of the test article, a processor of the apparatus obtains a first measured value from a physical quantity measured by at least one measurement sensor attached to the test article. Also, when the load applying unit applies a static load to the test article in a second direction different from the first direction so as to cause bending of the test article, the processor obtains a second measured value from a physical quantity measured by the measurement sensor. Then the processor calculates a correlation between the first measured value, the second measured value, and moment values respectively calculated from the static loads applied in the first and second directions. By considering a dual-axis load state, the moment calibration method can obtain reliable calibration results exactly matching with a real fatigue test. | 04-21-2016 |
| 20160116356 | DEVICE AND METHOD FOR MONITORING A CHAIN PARAMETER - Provided is a system for measuring a chain parameter of a moving chain, wherein the chain has a repetitive structure such as a chain link or teeth in a cogged belt. The system includes at least one image sensor positioned and configured to receive light from the moving chain, and a processor functionally associated with the image sensor. The processor is configured to obtain, from a signal stream received from the image sensor, a chain parameter characterizing the chain while the chain moves. An Image Monitoring Unit (IMU) may be assembled proximal the chain of a bicycles or of a spin bike, and a Human Computer Interface (HCI) unit including a display and functionally associated with the IMU, allows a user to view measurement results of a chain parameter and to operate the system. Further provided is a method of measuring a chain parameter of a moving chain. | 04-28-2016 |
| 20160377501 | Systems and Methods for Measuring Resistive Sensors - Systems and methods for accurately and precisely measuring the resistance of a resistive sensor of a matched resistive sensor pair disposed on opposite surfaces of a substrate. Certain embodiments include coupled each sensor of the matched resistive sensors to a thermally-isolated pair of reference resistors contained within an integrated circuit so as to form a Wheatstone bridge. A controller associated with the integrated circuit can adjust the resistance of the thermally-isolated pair of reference resistors until the ratio of resistances matches to the ratio of resistances between the sensors of the matched pair. | 12-29-2016 |
| 20170236625 | RESISTANCE ADJUSTMENT CIRCUIT, LOAD DETECTOR, AND RESISTANCE ADJUSTMENT METHOD | 08-17-2017 |
