| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073100750 | Angle, direction, or inclination | 46 |
| 20080202198 | BALLISTICS SYSTEMS AND METHODS - A scope may include an adjustment dial, which may be moved among a plurality of positions to configure the scope to compensate for projectile drops. The adjustment dial may be labeled with dial-calibration data, which may include one or more distance indicators and/or one or more windage hold-off indicators. The scope may be attached to a gun and the dial-calibration data may be at least partially generated using ballistics performance data based on shots fired by the gun. The dial-calibration data may be at least partially generated using shooting conditions. An electronic device may include a derived distance calculation module, which may be configured to use a distance to a target and actual shooting conditions to calculate a derived distance. The derived distance may be used in connection with an adjustment dial labeled with dial-calibration data at least partially generated using shooting conditions different from the actual shooting conditions. | 08-28-2008 |
| 20090031782 | Calibration and operation of wheel alignment systems - A method is provided for calibrating a sensor pod of a wheel alignment system, the sensor pod including a housing rotatably mounted on a spindle, and an image sensor in the housing having a viewing axis oriented in a direction substantially normal to an axis of rotation of the spindle for imaging a target affixed to an object such as a vehicle wheel. An example of the method includes mounting the pod on a fixture via the pod spindle such that the pod spindle is stationary, and positioning a target to allow imaging of the target with the pod image sensor. The pod is rotated such that its image sensor obtains images of the target in at least two rotational positions, and the images of the target at the at least two rotational positions are processed to determine the location of the axis of rotation of the spindle relative to the image sensor. | 02-05-2009 |
| 20100132432 | SURFACE SENSOR OFFSET - A method of operating a coordinate positioning apparatus having a surface sensor that is rotatable about at least a first axis. The method comprises obtaining a first measurement with the surface sensor at a first angular orientation and obtaining a at least a second measurement with the surface sensor at a second angular orientation. The first and second angular orientations are different to each other such that any offset of the surface sensor from an expected position will have at least a partially opposing affect on the first and second measurements. The method then compensates and/or establishes for the offset using the first and second measurements. | 06-03-2010 |
| 20100218588 | System and Method for Calibrating an Absolute Position Sensor - A system and method for calibrating an absolute angular position sensor and/or for providing pre-calibrated absolute angular position sensors comprises comparing, at a pre-elected number of angular positions, the angular position derived from the output of the sensor to the angular position reported by a reference sensor. The difference between the two outputs is used as an error correcting factor for the respective position. In addition to calibrating the sensor to reduce sensor errors, the calibration can also be used to determine the sensor output corresponding to an index position of interest. | 09-02-2010 |
| 20100242570 | Method for initializing indicating instrument for vehicle - According to a method for initializing an indicating instrument for a vehicle, zero-reset processing is performed. In the zero-reset processing, a control device is made to control a drive signal to rotate a pointer in a zero-reset direction in order to force a step motor to lose synchronization. Furthermore, synchronization loss detection processing is performed. In the detection processing, a physical phenomenon generated in a rotary drive system due to forcible synchronization loss of the motor during the zero-reset processing, is detected. Then, an electrical angle of the drive signal at a time of detection of the phenomenon is selected as a synchronization loss electrical angle. Finally, zero point setting processing is performed. In the setting processing, the electrical angle phase-shifted from the synchronization loss electrical angle in an indication value increasing direction by 180 degrees or less, is set as a zero point stored in the control device. | 09-30-2010 |
| 20110067479 | SYSTEM AND METHOD FOR CALIBRATING A ROTARY ABSOLUTE POSITION SENSOR - A system includes a rotary device, a rotary absolute position (RAP) sensor generating encoded pairs of voltage signals describing positional data of the rotary device, a host machine, and an algorithm. The algorithm calculates calibration parameters usable to determine an absolute position of the rotary device using the encoded pairs, and is adapted for linearly-mapping an ellipse defined by the encoded pairs to thereby calculate the calibration parameters. A method of calibrating the RAP sensor includes measuring the rotary position as encoded pairs of voltage signals, linearly-mapping an ellipse defined by the encoded pairs to thereby calculate the calibration parameters, and calculating an absolute position of the rotary device using the calibration parameters. The calibration parameters include a positive definite matrix (A) and a center point (q) of the ellipse. The voltage signals may include an encoded sine and cosine of a rotary angle of the rotary device. | 03-24-2011 |
| 20110167892 | SYSTEM AND METHOD FOR CALIBRATING A WAFER HANDLING ROBOT AND A WAFER CASSETTE - A system and method is disclosed for calibrating a semiconductor wafer handling robot and a semiconductor wafer cassette. A robot blade boot is attached to a robot blade of the semiconductor handling robot. The robot blade boot decreases a value of tolerance for the robot blade to move between two semiconductor wafers in the semiconductor wafer cassette. In one embodiment the vertical tolerance is decreased to approximately twenty thousandths of an inch (0.020″) on a top and a bottom of the robot blade boot. The use of the robot blade boot makes the calibration steps more critical and precise. The robot blade boot is removed from the robot blade after the calibration process has been completed. | 07-14-2011 |
| 20110197651 | Digital angle gauge - A digital angle gauge includes a gauge body having a reference surface that is engageable with an object to be measured for angular inclination. An angle sensor and processor mounted in the body determine an inclination angle of the object with which the reference surface of the gauge body is engaged. A digital screen is pivotally mounted to the gauge body for visually displaying the determined inclination. | 08-18-2011 |
| 20120151987 | METHOD AND ROTARY ENCODER FOR ESTIMATION OF ECCENTRIC VALUE - An angle detection apparatus includes a grating disk supported by a rotation axis and three or more detectors arrayed proximate to a front surface of the grating disk at equal distances in a circumferential direction of the grating disk. A rotation angle of the grating disk rotated by a reference angle from a predetermined initial position is detected by each of the detectors. An angle error at each of the detectors is measured from a difference between the rotation angle and the reference angle. A tangential vector is acquired by rotating by 90° a directional vector of each of the detectors relative to the rotation center. An eccentricity vector is calculated whose inner product with the tangential vector is the angle error. | 06-21-2012 |
| 20120222465 | CALIBRATION METHOD AND ANGLE MEASURING METHOD FOR AN ANGLE MEASURING DEVICE, AND ANGLE MEASURING DEVICE - The invention relates to a calibration method that can be carried out without a reference system for an angle measuring device having a code carrier carrying an absolute position code, and at least two reading heads comprising a fixed, known angle position at an angular distance, wherein the code carrier can be rotated relative to the reading heads, and different angle positions of the code carrier relative to the reading heads can thus be captured. Angle position values of the reading heads in an angular setting are determined and angular error is determined, which are repeated. And, a mathematical analysis method is performed, including determining the parameters of a mathematical function quantifying the angular error, and determining calibration parameters as parameters of the quantifying mathematical function or as a correction or code table derived from the parameters. | 09-06-2012 |
| 20130019652 | INDEX ERROR ESTIMATING APPARATUS, INDEX ERROR CALIBRATING APPARATUS, AND INDEX ERROR ESTIMATING METHOD - An index error estimating apparatus used for an index error calibrating apparatus that has a grating disk supported by a rotation shaft and four detectors arranged on the grating disk. The index error estimating apparatus includes a detected value synthesizer that calculates a linear sum by multiplying by a predetermined coefficient each of detected values obtained from each of the at least four detectors; and a Fourier component identifier that uses a Fourier component of the linear sum and identifies a Fourier component of the index error. | 01-24-2013 |
| 20130139566 | FIELD INTERCHANGABLE BORESIGHT MOUNTING SYSTEM AND CALIBRATION METHOD - A calibration method comprises providing a mounting fixture including a tray coupled to a frame, and an alignment measurement sensor removably coupled to the tray. An angular orientation of the tray is determined using the alignment measurement sensor removably coupled to the tray in a first position. The alignment measurement sensor is then moved to a second position on the tray that is rotated from the first position, and the angular orientation of the tray is determined using the alignment measurement sensor at the second position. An axis misalignment for at least two of a pitch axis, a roll axis, or a yaw axis of the alignment measurement sensor is then calculated to determine one or more misalignment factors. The one or more misalignment factors are then applied to correct for misalignment of the alignment measurement sensor. | 06-06-2013 |
| 20140020445 | SYSTEM AND METHOD OF POWER-SAVING IN MEMS SENSOR APPLICATIONS - At least some of the embodiments are methods including detecting low user dynamics by a first MEMS sensor, determining a first sensor sampling rate value corresponding to the low user dynamics wherein the first sensor sampling rate value is less than a second sensor sampling rate value corresponding to high user dynamics, and adjusting a sampling rate of a second MEMS sensor to the first sensor sampling rate value. | 01-23-2014 |
| 20140109646 | TWO-DIMENSIONAL METROLOGICAL CALIBRATION STANDARD - A two dimensional metrological calibration standard includes a plurality of calibration cylinders each having a diameter and a plurality of calibration gauge blocks each having a length, each calibration gauge block being interposed between two of the calibration cylinders, such that end faces thereof are in contact with the walls of adjacent calibration cylinders, the calibration cylinders and calibration gauge blocks as a group are fastened to a flat plate and conjointly form a triangle. Bearing and alignment rulers ensure alignment of the calibration gauge blocks between the calibration cylinders, by contact with the calibration gauge blocks and/or the calibration cylinders, and are fastened to the plate. | 04-24-2014 |
| 20140157860 | METHOD AND ARRANGEMENT FOR CALIBRATING SENSORS IN DRILLING EQUIPMENT - A method for calibrating sensors in a drilling apparatus provided with a movable carrier, a frame, a boom assembly mounted to rotate about a turning axis vertical to the frame, and an angle sensor for measuring the turning angle of the boom assembly and gravity-based inclination sensors for measuring inclination. When the boom assembly is turned in relation to the frame, the value of the turning angle and the inclination values provided by the inclination sensors are measured, and on the basis of the measured values, deviation of the values of the inclination sensors from the real inclination angle value are determined. | 06-12-2014 |
| 20150121990 | SELF-TEST FOR YAW RATE SENSORS - A yaw rate sensor ( | 05-07-2015 |
| 20150143870 | AZIMUTH ANGLE CALIBRATION METHOD AND MOTION ANALYSIS APPARATUS - A motion analysis apparatus includes a first calculation unit that calculates a first vector on a node in an absolute coordinate system using an output from a first inertial sensor attached to one of two rigid bodies linked by the node having a multiple degrees of freedom, a second calculation unit that calculates a second vector on the node in the absolute coordinate system using an output from a second inertial sensor attached to the other one of the rigid bodies; and a third calculation unit that calculates a difference in directions of the first vector and the second vector. | 05-28-2015 |
| 20160091340 | Method And Apparatus For Calculating A Correction Factor For An Angular Measuring System - A method for computing a correction factor (KF) for an angular measuring system ( | 03-31-2016 |
| 20160123765 | SYSTEM AND METHOD OF DIRECTIONAL SENSOR CALIBRATION - An improved total field calibration system and method is disclosed for reducing the rotational misalignment between magnetic and gravity sensors in a directional sensing system. A method of calibrating a tri-axial directional sensor comprising orthonormal accelerometers and orthonormal magnetometers, comprises measuring Earth's magnetic and gravity fields with said directional sensor in at least | 05-05-2016 |
| 20160138937 | ELECTRONIC DEVICE AND GRAVITY SENSING CALIBRATION METHOD THEREOF - An electronic device and a gravity sensing calibration method thereof are provided. The electronic device includes a gravity sensing unit, an image capturing unit and a processing unit. The gravity sensing unit recognizes a rotating direction of the electronic device according to default gravity reference data. The image capturing unit captures an image with an object. The processing unit obtains a current gravity sensing value through the gravity sensing unit and generates specific gravity reference data according to the current gravity sensing value. The processing unit analyzes the image to determine a moving direction of the object relative to the electronic device, so as to recognize the rotating direction of the electronic device according to the specific gravity reference data and the moving direction of the object. | 05-19-2016 |
| 20160169671 | METHOD FOR CALIBRATING A MEASUREMENT DEVICE | 06-16-2016 |
| 20160377451 | Method And Apparatus For Correcting Magnetic Tracking Error With Inertial Measurement - A method and apparatus is disclosed for synchronizing a magnetic field transmitter and receiver to resolve phase ambiguity so that phase information for the position and orientation of the receiver may be derived and maintained. A synchronization process allows for the phase information to be initially derived based upon known information from other sources, and then tracked from one measurement to the next. In another embodiment, information from an inertial measurement unit (IMU) is used to determine the phase information or to correct for errors in the determination from receiver data of the position and orientation of a receiver, and prevent such errors from accumulating as the receiver moves away from a transmitter. | 12-29-2016 |
| 073100760 | Compass | 3 |
| 20120096921 | System and Method for Calibrating a Magnetometer According to a Quality Threshold - A method and system are provided for calibrating a magnetometer. The method comprises determining a current quality level associated with magnetometer readings obtained using an active set of calibration parameters; and lowering a quality threshold for a background calibration of the magnetometer when the current quality level exceeds a threshold quality level needed by an application utilizing the magnetometer readings. | 04-26-2012 |
| 20120247176 | TEST AUXILIARY DEVICE - A test auxiliary device for testing a portable data terminal having a plurality of sensors includes a base, a carrying unit, a driving unit, and a controlling unit. The carrying unit is disposed on the base and includes a carrying platform and a carrying base. The carrying platform and the carrying base form a first angle and a second angle with the base, respectively, and thereby together form a compound slope. The driving unit drives the carrying unit to move, allowing the carrying platform to move with acceleration and at an angular velocity. The controlling unit receives sensing values generated by the sensors, respectively. The test auxiliary device further includes a test matching unit for testing the sensors in operation. Accordingly, the test auxiliary device assists users in determining whether the sensors of the portable data terminal are functioning well. | 10-04-2012 |
| 20160076888 | ELECTRONIC APPARATUS - An electronic apparatus includes a detecting unit that detects a magnetic field and outputs a detection value corresponding to the detected magnetic field, a correcting unit that corrects the detection value according to a type of a power source connected to the electronic apparatus, and a determining unit that determines, using the corrected detection value, an azimuth in which a predetermined surface of the electronic apparatus is directed. | 03-17-2016 |
| 073100770 | Gyroscope | 18 |
| 20080202199 | Positioning System For Single Or Multi-Axis Sensitive Instrument Calibration And Calibration System For Use Therewith - A positioning and calibration system are provided for use in calibrating a single or multi axis sensitive instrument, such as an inclinometer. The positioning system includes a positioner that defines six planes of tangential contact. A mounting region within the six planes is adapted to have an inclinometer coupled thereto. The positioning system also includes means for defining first and second flat surfaces that are approximately perpendicular to one another with the first surface adapted to be oriented relative to a local or induced reference field of interest to the instrument being calibrated, such as a gravitational vector. The positioner is positioned such that one of its six planes tangentially rests on the first flat surface and another of its six planes tangentially contacts the second flat surface. A calibration system is formed when the positioning system is used with a data collector and processor. | 08-28-2008 |
| 20090133467 | Robot Equipped with a Gyro and Gyro Calibration Apparatus, Program, and Method - While calibrating the position of a robot having a gyro, the robot emits a beam of light to a target wall surface, and the position of a laser point on the target wall surface illuminated by the beam of light is measured. The measured position is obtained as an initial value (S | 05-28-2009 |
| 20100281945 | CALIBRATION OF GYRATORY COMPACTOR APPARATUSES AND ASSOCIATED METHODS - A method for calibrating a gyratory compactor apparatus is provided. The gyratory compactor apparatus is of the type being configured to compact and impart an orbital motion to a sample in a mold that defines a mold axis and includes at least one actuator for imparting lateral displacement of the mold relative to a longitudinal axis of the gyratory compactor apparatus. The method includes the steps of imparting lateral orbital displacement of the mold relative to the gyratory compactor apparatus by actuation of the at least one actuator to thereby define a gyratory angle between the gyratory compactor apparatus and the mold axis, measuring the gyratory angle, and determining adjustments to actuation of the at least one actuator based on the measured gyratory angle and a target angle. An associated apparatus and method for calibrating the apparatus are also included. | 11-11-2010 |
| 20110113853 | METHOD FOR CALIBRATING A ROTATIONAL ANGLE SENSOR - A method for calibrating a rotational angle sensor having a rotor ( | 05-19-2011 |
| 20110167893 | METHOD AND APPARATUS FOR IN-FLIGHT CALIBRATION OF GYROSCOPE USING MAGNETOMETER REFERENCE - The system includes a mobile vessel having a body axis and a steering mechanism. A three-axis gyroscope is mounted within the vessel. A three-axis magnetometer is mounted within the vessel. A programmable device communicates with the three-axis gyroscope, the three-axis magnetometer, and the steering mechanism. The three-axis gyroscope may include three single axis gyroscopes. | 07-14-2011 |
| 20110232359 | Calibration Of Vibratory Gyroscope - A gyroscopic system comprises at least four vibratory gyroscopes capable of changing vibration position. A first measurement is provided by a gyroscope to be calibrated and a second measurement is provided by a combination of the respective measurements from the other gyroscopes of the system, these first and second measurements being carried out along the same measurement axis. The determination ( | 09-29-2011 |
| 20110259078 | Calibration of Gyroscopic Systems with Vibratory Gyroscopes - In a gyroscopic system comprising at least four vibratory gyroscopes, a first measurement is provided by said vibratory gyroscope to be calibrated, and a second measurement is provided by a combination of the measurements from the other vibratory gyroscopes of the system. At the level of the vibratory gyroscope to be calibrated, an initial command is applied in order to command a change in position from a first vibration position (θ | 10-27-2011 |
| 20110308296 | High-frequency, hexapod six degree-of-freedom shaker - A shaker for enabling the testing of gyros and/or other devices for performance under realistic 6DOF motions. The shaker may be implemented as a hexapod, comprising a plate and six individually, simultaneously, and real-time controllable strut assemblies that are capable of extending and contracting linearly. The strut assemblies may comprise high-precision, linear electromagnetic actuators. The strut assemblies may also comprise high-precision non-contact sensors to sense the extension/contraction of the strut assemblies along their stroke length. In addition, the strut assemblies may comprise, at each end thereof, stiff, bendable flexures to attain the repeatable and linear motion required. The controller preferably has a control bandwidth of 1000 Hz or more, so that the motion of the plate can be precisely controlled to realize realistic 6DOF motions. | 12-22-2011 |
| 20130031950 | MICROELECTROMECHANICAL GYROSCOPE WITH SELF-CALIBRATION FUNCTION AND METHOD OF CALIBRATING A MICROELECTROMECHANICAL GYROSCOPE - A microelectromechanical gyroscope having a supporting structure; a mass capacitively coupled to the supporting structure and movable with a first degree of freedom and a second degree of freedom, in response to rotations of the supporting structure about an axis; driving components, for keeping the mass in oscillation according to the first degree of freedom; a read interface for detecting transduction signals indicating the capacitive coupling between the mass and the supporting structure; and capacitive compensation modules for modifying the capacitive coupling between the mass and the supporting structure. Calibration components detect systematic errors from the transduction signals and modify the capacitive compensation modules as a function of the transduction signals so as to attenuate the systematic errors. | 02-07-2013 |
| 20130125614 | METHOD AND APPARATUS FOR SELF-CALIBRATION OF GYROSCOPES - A gyroscope having a resonant body utilizes a self-calibration mechanism that does not require physical rotation of the resonant body. Instead, interface circuitry applies a rotating electrostatic field to first and second drive electrodes simultaneously to excite both the drive and sense resonance modes of the gyroscope. When drive electrodes associated with both the drive and sense resonance modes of the gyroscope are excited by forces of equal amplitude but 90° phase difference, respectively, the phase shift in the gyroscope response, as measured by the current output of the sense electrodes for each resonance mode, is proportional to an equivalent gyroscope rotation rate. | 05-23-2013 |
| 20130133397 | GYRO SENSOR OFFSET AUTOMATIC CORRECTING CIRCUIT, GYRO SENSOR SYSTEM AND METHOD FOR AUTOMATICALLY CORRECTING OFFSET OF GYRO SENSOR - Disclosed herein are a gyro sensor offset automatic correcting circuit, a gyro sensor system, and a method for automatically correcting offset of a gyro sensor. There is provided a gyro sensor offset automatic correcting circuit, including: a signal gain controller receiving and amplifying output signals of each sensor electrode, while removing at least some of offset by a driving signal component included in each output signal by controlling a variable resistor(s); and an amplitude detector detecting the output signal of the signal gain controller to control the variable resistor(s) so that the output signal of the signal gain controller is maintained within a predetermined range. Further, there are provided a gyro sensor system including the gyro sensor offset automatic correcting circuit and a method for automatically correcting offset of a gyro sensor. | 05-30-2013 |
| 20130233048 | GYROSCOPE SELF TEST BY APPLYING ROTATION ON CORIOLIS SENSE MASS - A self-test method by rotating the proof mass at a high frequency enables testing the functionality of both the drive and sense systems at the same time. In this method, the proof mass is rotated at a drive frequency. An input force which is substantially two times the drive frequency is applied to the actuation structures to rotate the proof mass of the gyroscope around the sensitive axis orthogonal to the drive axis. An output response of the gyroscope at the drive frequency is detected by a circuitry and a self-test response is obtained. | 09-12-2013 |
| 20140331740 | CALIBRATION METHOD FOR THE SCALE FACTOR OF AN AXISYMMETRIC VIBRATORY GYROSCOPE OR GYROMETER - The invention relates to gyroscopic instruments. The method for calibrating the scale factor of an angular velocity sensor or an axisymmetric vibratory gyroscope, which method uses a control amplitude signal, a control precessional signal CP and a control quadrature signal CQ for exciting the vibration of a resonator on a resonant frequency, involves a first step of pre-calibration which consists of measuring and recording an initial scale factor and the value of an initial control signal, and a second step of measuring the value of the current control signal and establishing a scale factor SF that is corrected on the basis of a proportional relationship involving the initial scale factor SF°, the initial value of the control signal Y° and the current value of the control signal Y° according to the formula SF=SF°Y/Y°. | 11-13-2014 |
| 20150033821 | METHOD AND SYSTEM FOR GYROSCOPE REAL-TIME CALIBRATION - A method for real-time calibration of a gyroscope, configured for supplying a value of angular velocity that is function of a first angle of rotation about a first angular-sensing axis that includes defining a time interval, acquiring from an accelerometer an equivalent value of angular velocity that can be associated to the first angle of rotation; calculating a deviation between the value of angular velocity and the equivalent value of angular velocity; iteratively repeating the previous steps through the time interval, incrementing or decrementing an offset variable by a first predefined value on the basis of the values assumed by the deviations during the iterations, and updating the value of angular velocity as a function of the offset variable. | 02-05-2015 |
| 20150114082 | METHODS AND APPARATUS FOR INCREASING ACCURACY AND RELIABILITY OF GYROSOPIC SENSORS - The present disclosure describes systems and methods for maintaining gyroscopic sensor accuracy over time and across changing environmental conditions. In certain aspects, the present disclosure provides arrangements and methods for calibrating a gyroscope while it is positioned on a robotic platform. In particular, the gyroscope may positioned on a sensor platform that is moved through a series of known or measured rotations and then the gyroscope signals are compared to reference data and the sensor's gain and offset calculated. In other aspects, the present disclosure provides arrangements and methods for utilizing measurements from multiple gyroscopes that measure the same axis of rotation. | 04-30-2015 |
| 20150354981 | GYROSCOPE WITH SIMPLIFIED CALIBRATION AND SIMPLIFIED CALIBRATION METHOD FOR A GYROSCOPE - A gyroscope including a mass capable of movement due to excitation and a mass capable of movement due to detection, a mechanism applying an excitation signal to the excitation mass in a first direction, a mechanism detecting the movement of the detection mass in a second direction orthogonal to the first direction, a mechanism detecting the movement of the excitation mass in the second direction, and a processor processing detection signals emitted by the mechanism detecting movements of the detection mass and the mechanism detecting movements of the excitation mass in the second direction, to obtain a phase bias, quadrature bias, and amplification factor. | 12-10-2015 |
| 20160018243 | METHOD FOR CALIBRATING VIBRATORY GYROSCOPE - The present invention is concerned with a method of calibrating a vibrating gyroscope. The method comprises exciting a vibration along an excitation axis of a resonant structure wherein the excitation axis is positioned at a first angular position, sensing the vibration of the resonant structure on a first sensing axis of the resonant structure while the excitation axis is positioned at the first angular position, generating a first sensing signal indicative of the sensed vibration of the resonant structure on the first sensing axis, rotating the excitation axis in a continuous manner around the resonant structure to a second angular position, sensing the vibration of the resonant structure on a second sensing axis of the resonant structure while the excitation axis is positioned at the second angular position, generating a second sensing signal indicative of the sensed vibration of the resonant structure on the second sensing axis and adding the first sensing signal to the second sensing signal in order to derive a bias of the gyroscope. | 01-21-2016 |
| 20160091339 | CALIBRATION SYSTEMS AND METHODS FOR GYROSCOPES - Methods and apparatus for calibrating a gyroscope without rotating the instrument. In one example, a calibration method includes operating the gyroscope in a self-oscillation loop to generate x-axis and y-axis drive signals, adding forcing signals to the x-axis and y-axis drive signals to produce pick-off x-axis and y-axis signals, measuring the pick-off x-axis and y-axis signals to produce measurement data, determining a relative phase between the pick-off x-axis and y-axis signals, based on the measurement data and the relative phase, estimating parameters of the gyroscope, based on the measurement data and the estimated parameters, calculating estimated position signals to calibrate the gyroscope. | 03-31-2016 |
| 073100780 | Aircraft, inertial navigation, or attitude | 3 |
| 20100132433 | Precision approach path indicator field testing instrument - The Field Testing Instrument (FTI) is designed for use in the regular maintenance and installation of airport Precision Approach Path Indicator (PAPI). The FTI is a self-contained and portable instrument that accurately measures the most important PAPI parameters, such as vertical aiming angle, transition angle, and light intensity. In addition to working with the current incandescent PAPIs, the FTI also measures parameters specific to the next generation LED PAPI. The FTI uses modern, efficient technology to reduce the life-cycle cost of approach lighting systems. The FTI improves on traditional PAPI testing methods by directly measuring the PAPI light beam focused to a target plate, as if seen from the pilot perspective. Due to significantly improvements in measurement accuracy and reliability, the FTI may supplement and even replace costly flight checks for PAPI maintenance with ground based operation. | 06-03-2010 |
| 20110005298 | METHOD FOR INDEPENDENT ALIGNMENT OF AN INERTIAL UNIT FOR AN ONBOARD INSTRUMENT OF AN AIRCRAFT - A method for independent alignment of an inertial measurement unit for a stand-by instrument in an aircraft determining a status of the aircraft, that is to say whether or not the aircraft is in flight, and in the case where the aircraft is detected as being in flight, carrying out a flight alignment, and in the case where the aircraft is not detected as being in flight, determining a stability of the aircraft, that is to say whether the aircraft is on the ground or at sea, and in the case where the aircraft is detected as being on the ground, carrying out a ground alignment, and in the case where the aircraft is detected as being at sea, carrying out a sea alignment. | 01-13-2011 |
| 20130213111 | METHOD AND A SYSTEM FOR HARMONIZING A FRAME OF REFERENCE OF AN ANGULAR POSITIONER RELATIVE TO A TERRESTRIAL FRAME OF REFERENCE - A method for harmonizing a frame of reference of an angular positioner to receive a moving body relative to the terrestrial frame of reference, the angular positioner carrying a measurement device for taking inertial measurements of the moving body, the method includes obtaining, using inertial measurements taken by a measurement device on-board the angular positioner during at least one predetermined operating period, values representative of a local magnitude of gravity as perceived by the measurement device and/or of a speed of rotation of the earth, the angular positioner being held stationary during the at least one operating period; evaluating, using the obtained values, at least one angular bias affecting the frame of reference of the positioner; and harmonizing the frame of reference of the positioner relative to the terrestrial frame of reference by compensating for the at least one angular bias as evaluated in this way. | 08-22-2013 |
