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7526398 |
Method and apparatus for calibrating gyro-sensor
A method and apparatus for calibrating a gyro-sensor, by which a gyro-sensor can be calibrated using data which is obtained by measuring an angular velocity and a gyro output value of a moving body...
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7509830 |
Method for monitoring a rotating rate sensor
A method for monitoring a rotation rate sensor comprising a vibration gyroscope that represents a band-pass filter and that is part of at least one control circuit, wherein the control circuit...
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7505865 |
Velocity detection, position detection and navigation system
As an embodiment of the present invention, in a navigation system using an acceleration sensor, when position information cannot be obtained from a GPS processing section, a velocity detecting unit...
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7502703 |
Calibration of the fundamental and harmonic once-around velocity variations of encoded wheels
A method of calibrating once-around and harmonic errors of encoded nips is provided. An encoder with an index pulse is used to measure the velocity and rotation of the driven wheel or idler. The...
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7392145 |
Speedometer drive apparatus and method
An automotive speedometer drive apparatus is disclosed that replaces an existing speedometer cable of the type used to drive mechanical speedometer instruments. The drive being an electronically...
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7363191 |
Estimation methods for wave speed
Robust methods are developed to provide bounds and probability distributions for the locations of objects as well as for associated variables that affect the accuracy of the location such as the...
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7313466 |
System and method for automatically detecting a type of a CPU fan
An exemplary method for automatically detecting a type of a CPU fan includes: setting a PWM duty cycle of the CPU fan to a value of 100%; obtaining revolutions of the CPU fan at the PWM duty cycle...
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7308373 |
Method for determining a vehicle reference velocity
A velocity and acceleration are measured ( 14 ) in a method for determining a vehicle reference velocity, said vehicle reference velocity being used for determining and selecting a suitable...
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7289915 |
Method of estimating load inertia for a motor
A method of estimating load inertia for a motor is provided that can estimate the load inertia even when a cogging torque of the motor is large or resonance occurs in the mechanical system of the...
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7281522 |
Acceleration sensor status detecting apparatus
An acceleration sensor state detecting apparatus for detecting a state of an acceleration sensor provided at a vibrating body includes a calculating method for calculating a difference between...
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7277809 |
Radio frequency identification tag based speedometer calibration
A computer implemented method, apparatus, and computer usable program code for calibrating a speedometer of a vehicle. First information is received by the vehicle from a first radio frequency...
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7254516 |
Multi-sensor monitoring of athletic performance
Athletic performance monitoring systems and methods, many of which utilize, in some manner, global positioning satellite (“GPS”) data, provide data and information to athletes and/or to...
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7239972 |
Method for setting, in a motor vehicle electrical power steering system, the power steering torque set point
A motor vehicle power steering system, including a steering column and a power steering motor. The column has an upper part bearing a steering wheel and a lower part acting on a mechanical steering...
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7200508 |
Method and device for monitoring a control unit of an internal combustion engine
The invention relates to a method for monitoring a control unit of an internal combustion engine, according to which a variable, which characterises the initial parameter of a lambda regulation...
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7120548 |
Method of calibrating bias drift with temperature for a vibrating structure gyroscope
A method of calibrating bias drift with operating temperature over an operating temperature range for a vibrating structure gyroscope. The method includes the steps of measuring, over an operating...
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7096136 |
Method for detecting rotational speed
In a method for detecting rotational speed of an internal combustion engine ( 1 ), a sector wheel ( 4 ) which is driven by the internal combustion engine ( 1 ) is scanned, the run of a specific...
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7075290 |
Tachometer apparatus and method for motor velocity measurement
A method and apparatus for determining the velocity of a rotating device is described herein. The apparatus includes a magnet assembly affixed to a rotating shaft of a rotating device and a circuit...
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7066004 |
Inertial measurement unit using rotatable MEMS sensors
A MEM inertial sensor (e.g. accelerometer, gyroscope) having integral rotational means for providing static and dynamic bias compensation is disclosed. A bias compensated MEM inertial sensor is...
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6999886 |
Vehicle speed estimation using inductive vehicle detection systems
A method and apparatus for communicating estimated vehicular speed and length using data obtained from a single wire-loop. The detector card connected to a single wire-loop produces a first...
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6968281 |
Method for calibrating an inertial measurement unit
A method for testing inertial measurement devices on a multi-axis rate table without having to utilize slip rings to transfer signals between the inertial measurement devices and remote processors...
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6963818 |
Mobile speedometer system and associated methods
The invention detects loft time and/or speed of a vehicle and/or person during activities of moving and jumping. A loft sensor detects leaving the ground and returning to the ground. A...
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6931306 |
System and method of designing cooling fans
A method of programming behavior of at least one cooling fan includes installing the at least one cooling fan within a housing. Operating parameters of the at least one cooling fan are set....
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6889127 |
Vehicle tampering protection system
A method of providing a vehicle monitoring system for ensuring accurate vehicle milleage readings. A comparison is made between velocity measurements from several sources to detect unauthorized...
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6882948 |
Speed-dependent setpoint correction in electrically regulated slave drives
The system and method of the present invention is to drive a slave axis (S_A) with a value which indicates to said slave axis that the guide axis (L_A) has already rotated further than is actually...
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6879920 |
Method and system for estimating movement speed of mobile unit
The present invention is related to a method for estimating a movement speed of a mobile unit in a mobile radio communication system. First, the present invention receives a first signal from the...
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6847914 |
Method for determining the rotational position of the drive shaft of a commutated DC motor
A method for determining the position of a shaft of a commutated direct current (DC) motor based on the current ripples contained in an armature current signal includes digitally sampling the...
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6836729 |
Method of and apparatus for detecting vehicle speed pulse drop, on-vehicle navigation system, program storage device and computer data signal embodied in carrier wave
An on-vehicle navigation system is provided with a radio wave positioning apparatus ( 18 ) and a vehicle speed sensor ( 13 ) for a dead reckoning positioning. A method of detecting a vehicle speed...
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6801838 |
Device and method for converting vehicle speed signals
The present invention relates to a device for converting vehicle speed signals characterized in that it includes a controller for converting vehicle speed signals which has a switch for controlling...
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6795787 |
Method and apparatus for calibrating a sampling circuit
An apparatus and method for calibrating a first sampling circuit with a second sampling circuit having a similar impulse response. The second sampling circuit includes a sample and hold circuit...
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6778924 |
Self-calibrating inertial measurement system method and apparatus
A system for testing inertial measurement devices on a multi-axis rate table without having to utilize slip rings to transfer signals between the inertial measurement devices and remote processors...
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6763293 |
Calibration procedure for a permanently powered relative steering wheel angle sensor with power-loss indication
A method is disclosed for determining a steering wheel angle calibration reference value in a vehicle. The vehicle includes a relative steering wheel angle sensor, which is unique in that it...
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6745143 |
Method and device for determining correction values for wheel speeds
A method is provided for determining correction values for the wheel speeds of a vehicle, comprising the step of determining the speeds of the vehicle wheels during travel, with the speeds of the...
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6636819 |
Method for improving the performance of micromachined devices
A method for improving the performance of a micromachined device, preferably an angular rate microsensor, is provided. The method includes collecting data on rate bias over a selected operating...
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6591209 |
Automatic calibration of speed signal scaling
A method for automatically calibrating a vehicle speed sensor signal input to an electronic control system includes operating a vehicle at a reference speed. A speed signal pulse period, generated...
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6564125 |
Method for updating a sensor using a robust sensor offset learning algorithm
A method for updating a sensor offset and a medium encoded with a machine-readable computer program code for updating a sensor using a robust sensor learning algorithm wherein the method includes...
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6564109 |
Methods and systems for compensation of measurement error
Methods and systems for reducing or removing the effect of measurement error so that an actual engine operates closer to optimum are described. In an exemplary embodiment, the method includes the...
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6546348 |
Range switchover apparatus for automatic transmission
A range switchover apparatus includes a range switchover means operating device capable of switching over a switchover means, which switches over a shift range, among respective shift positions, a...
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6507799 |
Method and apparatus for reducing microprocessor speed requirements in data acquisition applications
A method and apparatus for improving microprocessor data acquisition. Noise in analog signals is removed by a low pass filter with a variable cutoff frequency controlled to cut off all frequencies...
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6502053 |
Combination passive and active speed detection system
A combination passive and active detection system including a passive speed and range detection system able to sense the speed and range of a moving object and an active speed detection system able...
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6476605 |
Inductive sensor for target parameter detection and magnetic image feature determination
Inductive sensor for non-contact detection of discontinuities of a conductive or ferromagnetic target for determination of target position, movement and speed, or generally of a magnetic image,...
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6446018 |
Method for compensating variations of a wheel speed sensor
A method of compensating inaccuracies in a wheel speed sensor wherein signal-forming elements are arranged on a sensor wheel and wherein a determined angle is allocated to a given number of...
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6412329 |
Method of and apparatus for reducing vibrations on probes carried by coordinate measuring machines
A coordinate measuring machine (CMM) carries a probe and is controlled by a controller to drive the probe to take measurements on a workpiece. In order to reduce the effects of acceleration-induced...
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6401036 |
Heading and position error-correction method and apparatus for vehicle navigation systems
The present invention provides methods and devices that enable correction of gyroscope bias and gyroscope bias drift in low-cost, vehicular navigation and positioning systems without using...
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6230107 |
Vehicle speed detection system
Correction for compensating for errors caused by the pitching movement of a vehicle is executed with high accuracy at low cost. The ground speed of the vehicle sensed by a Doppler sensor is...
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6194850 |
System and method for determining true ground speed in a locomotive
A processor system and method for accurately determining true ground speed in a vehicle having wheel-axles propelled by traction motors is provided. The vehicle is equipped with a radar unit for...
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6192299 |
Method of measuring operation characteristic of proportional electromagnetic control valve, method of controlling operation of hydraulic cylinder, and method of modifying operation characteristic of proportional electromagnetic control valve
A method by which an operation characteristic of a proportional electromagnetic control valve can be automatically measured in a short period of time. For this purpose, in the operation...
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6148269 |
Wheel diameter calibration system for vehicle slip/slide control
A method and apparatus for wheel diameter calibration in a vehicle of the type having a plurality of independently powered wheel-axle sets which can be implemented as a forced calibration while the...
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6087826 |
Device for detecting electromagnetic stray effects in systems with at least two inductive sensors providing periodic output signal
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6055488 |
Device for calculating initial correction factor for correcting rotational velocity of tire
A device for calculating a correction factor for correcting an output of a rotational velocity detecting device for detecting the rotational velocities of right and left tires mounted on a vehicle....
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6006165 |
Speed measuring apparatus and toy for measuring speed of moving member
A speed measuring apparatus and a toy for measuring a speed of a moving member has a quartz oscillator for generating a clock signal which has a predetermined frequency, a CR oscillator for...
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