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8151640 |
MEMS on-chip inertial navigation system with error correction
An on-chip navigation system, optionally combined with GPS (Global Positioning System) and/or an imaging array, which incorporates MEMS (MicroElectroMechanical Systems) components is possible by...
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8155819 |
System and method for effecting vehicle maneuver to compensate for IMU error
The effects of IMU gyro and accelerometer bias errors are significantly reduced in accordance with the present teachings by a system or method for commanding an IMU or vehicle through a series of...
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8146401 |
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...
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8065074 |
Configurable inertial navigation system with dual extended kalman filter modes
A system and method for more accurately and robustly estimating navigation state of a vehicle by adaptively processing signals from an inertial sensor assembly and other sensors. A navigation...
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8057482 |
Surgical orientation device and method
A device for detecting and measuring a change in angular position with respect to a reference plane is useful in surgical procedures for orienting various instruments, prosthesis, and implants with...
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8020442 |
High bandwidth inertial measurement unit
An inertial measurement unit is disclosed which includes a system of gyros for sensing angular rates, a system of accelerometers for sensing angular accelerations, an integrator for deriving...
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8005635 |
Self-calibrated azimuth and attitude accuracy enhancing method and system (SAAAEMS)
A method and system for Self-calibrated Azimuth and Attitude Accuracy Enhancing are disclosed, wherein SAAAEMS approach is based on fully auto-calibration self-contained INS principles, not...
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7992438 |
Multiaxial gyroscope
The present invention relates to a multiaxial gyroscope, which comprises a vibration-sensing device, a plurality of elastic connecting parts, a first substrate, and a plurality of electrodes. The...
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7979207 |
Systems and methods for detecting a vehicle static condition
Systems and methods for detecting a vehicle static condition are provided. In this regard, a representative system includes a sensor operative to detect at least one of acceleration and angular...
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7434466 |
Gyro sensor
The electrostatically-driven/capacitance-detection type gyro sensor has a sensing element including a movable part, the sensitivity of the sensing element and accordingly the sensitivity of a...
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7325455 |
High-temperature piezoelectric vibration sensor assembly
An integral connectorless hermetically sealed high-temperature piezoelectric sensor housing and cable assembly includes signal conditioning/processing circuitry having a charge...
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7275433 |
Micro-electro-mechanical sensor with force feedback loop
A micro-electro-mechanical sensor includes a microstructure having a mass which is movable with respect to a rest position, according to a predetermined degree of freedom, and a...
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7225524 |
Method for fabricating a gyroscope
Method for fabricating a gyroscope including: fabricating a SMS wafer where a first wafer, a metal film, and a second wafer are sequentially stacked; forming a cantilever or a bridge...
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7081824 |
Track monitoring equipment
The alignment of railway tracks may be monitored using an accelerometer (36) mounted on a bogie (24) of a railway vehicle to detect lateral accelerations, and a displacement transducer (38) to...
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6934665 |
Electronic sensor with signal conditioning
A method for extracting components from signals in an electronic sensor (50) having a sensing element (52). The sensing element (52) generates a first signal (60) and a second signal (62). The...
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6842153 |
Instrument alignment devices and methods
An apparatus for determining an instrument boresight azimuth heading. A typical apparatus comprises a gyro having a first input and a first output and a rocking angle generator having a second...
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6792819 |
Method and system for analyzing motion transferred to a subject on a sleeping surface
A method and system for analyzing the transfer of motion to a subject on a sleeping surface. A mattress is positioned on a frame, and a subject is positioned on the mattress. A sensor is placed in...
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6789029 |
Method and apparatus for signal extraction in an electronic sensor
A method for extracting components from signals in an electronic sensor (50) having a sensing element (52). The sensing element (52) generates a first signal (60) and a second signal (62). The...
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6742388 |
Device for measuring the angular velocity of a pivotally mounted vehicle element
A vehicle is provided, including a vehicle body; at least one vehicle element pivotally mounted to the vehicle, the vehicle element configured to pivot through an angle not more than 360 degrees;...
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6609037 |
Gimbal pointing vector stabilization control system and method
A hybrid stabilization system for isolating a pointing vector of a gimbal from the motion of a vehicle base is provided. The hybrid stabilization control system includes a rate feedback loop...
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6575031 |
Transducer for measuring displacement of a vehicle spindle
A transducer includes a body mountable to a vehicle spindle and a plurality of accelerometers coupled to the body. The plurality of accelerometers measure acceleration of the body. A calculation...
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6389894 |
Method for determining the heights of multiple jumps
Comparable values for the heights of the individual jumps in a series of multiple jumps can be achieved, if defined initial conditions for first and second successive integrations of measured...
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6361507 |
Inertial orientation tracker having gradual automatic drift compensation for tracking human head and other similarly sized body
A self contained sensor apparatus generates a signal that corresponds to at least two of the three orientational aspects of yaw, pitch and roll of a human-scale body, relative to an external...
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6147626 |
Determination of zero-angular-velocity output level for angular velocity sensor
A technique for determining a gyro zero voltage is provided. A gyroscope ("gyro") is installed in an automobile as a component of an on-board navigation system. The gyro outputs a voltage...
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6145378 |
Aided inertial navigation system
The invention relates particularly to sensing devices and techniques which may be used to provide measurement data to aid an inertial navigation system, or attitude and heading reference system,...
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6122959 |
Method and apparatus for recording physical variables of transient acceleration events
An acceleration recorder and related method for monitoring, discriminating, and recording acceleration events only when the acceleration and calculated velocity change both exceed selected trigger...
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6107616 |
Power failure interrupt recovery for the pendulous oscillating gyroscopic accelerometer (POGA)
A system for protecting a pendulous oscillating gyroscopic accelerometer (POGA) from power failure interruption (PFI) events, the POGA having a servo driven member (SDM), rotor driven member (RDM),...
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6089087 |
Method for adjusting the temperature characteristic of a vibrating gyroscope
A vibrating gyroscope includes a vibration member in which first and second piezoelectric substrates are joined together. On the outside main surface of the first piezoelectric substrate, a first...
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5795988 |
Gyroscope noise reduction and drift compensation
A low-cost gyroscope can provide an output approaching the accuracy of more precise instruments by processing the gyroscope output signal. First, a calibration algorithm develops a set of...
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5736970 |
Accelerometer method and apparatus for integral display and control functions
Method and apparatus for detecting mechanical vibrations and outputting a signal in response thereto. An accelerometer package having integral display and control functions is suitable for mounting...
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5597954 |
Bearing sensor and bearing-distance sensor
A small and inexpensive bearing-distance sensor capable of detecting a travel bearing and a travel distance of a vehicle. The bearing-distance sensor includes a rectangular parallelepiped case. A...
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5541860 |
Small size apparatus for measuring and recording acceleration
A small size apparatus for measuring and recording acceleration comprises an acceleration sensor, an A/D converter which converts the output signal of the acceleration sensor to a digital signal, a...
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5492010 |
Position identification device using an accelerometer
A device for determining position uses three voltage dividers. Each voltage divider is a metal conductor having a head on one end and two legs on an opposite end. The tips of the legs of each of...
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5329816 |
Electrode pattern intended for tuning fork-controlled gyro
A tuning fork-controlled gyro includes two legs and a base part, one end of each leg being connected with the base part and the legs being freely vibratable and provided with an electrode pattern...
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5176431 |
Vehicle deceleration prediction based on vehicle dive
An improved scheme for predicting vehicle velocity independent of wheel speed for use in a vehicle antilock braking system (31) is disclosed and includes an arrangement for measuring variations in...
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5130937 |
Method and apparatus for storing velocity data
A method and apparatus for determining a change in velocity of a body following a power disruptive event. An accelerometer (10, 50) includes quartz crystals (16 and 18, 60 and 62), which produce...
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5044201 |
Double-integrating silicon acceleration sensing device
A double integrating silicon acceleration sensing device which is solid state and micromachined measures the acceleration of an object and determines the distance travelled by that object through...
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4932260 |
Crash sensing switch with suspended mass
A crash sensor for automobiles of the type including a sensing mass movable in a closed chamber against pressure resulting from viscous flow has a disk shaped sensing mass suspended by one or two...
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4712427 |
Vibrating beam accelerometer with velocity change output
A dual sensor, frequency output accelerometer that does not require either high sampling rates or mechanical matching of the sensors to achieve high levels of accuracy. In one embodiment, the...
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4611490 |
Angular acceleration sensor
A simple and shock-resistant device to measure angular acceleration about a predefined axis without using any spinning or vibrating mass. The device comprises a weight having a shape symmetrical...
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4365512 |
Null circuit for use in an angular rate instrument
An angular rate instrument adapted for mounting to a given object for measuring the rate of turn of the latter is disclosed herein. This instrument utilizes an angular accelerometer to sense...
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4361040 |
Integrating angular accelerometer
The present invention is directed to an integrating angular accelerometer ich has a neutrally buoyant mass, thereby eliminating the detrimental effect of high shock and vibration loads. The...
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4349769 |
Incremental integrator and the resulting servosensors
Precision incremental-output integrator of the type comprising: an operational amplifier mounted as analog summing integrator, which sums currents I1 and I2 at the integrator input, characterized...
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4317105 |
Condition indicating device for wheeled vehicle shock absorbers
According to the invention, an accelerometer (G) is attached on the spring suspension (U) of the wheel (H) in question and capable upon passing of the vehicle over road irregularities to emit a...
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4298777 |
Distress gas generating signal balloon apparatus
A crash force sensor is disclosed which may be used to activate emergency location systems such as a transmitter or an inflatable aerial tethered balloon. The crash force sensor comprises a casing...
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4275605 |
Acceleration sensitive gyroscope stabilized platform
An inertial measuring unit which precesses about the direction of apparent acceleration as a consequence of the introduction of a mass unbalance to each of the gyroscopes in the inertial measuring...
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4109534 |
Apparatus for monitoring acceleration
There is disclosed an apparatus for monitoring acceleration of a body which utilizes liquid flow technology thus avoiding the need for electrical power. The apparatus includes steel balls of...
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4095547 |
Acceleration measuring device
An angular accelerometer incorporates two tilt sensors both connected to a differential amplifier arranged to provide a difference signal which is fed to a first integrator the output of which is...
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4085363 |
Rate measuring system
A rate measuring system for providing velocity signals, as desired, and displacement signals, including at least one accelerometer for providing an output voltage proportional to an acceleration...
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3998104 |
Fluid pressure pulsed rebalanced accelerometer
A force rebalanced accelerometer utilizing a spherical proof mass disposed in a fluid and in which fluid pressure pulses developed by positive displacement pump are used to balance inertial forces.
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