Ithaca, NY, United States
Ithaca, NY, United States

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Patent
Kionix Inc. | Date: 2016-12-07

Techniques are described herein that perform pressure sensing using pressure sensor(s) that include deformable pressure vessel(s). A pressure vessel is an object that has a cross section that defines a void. A deformable pressure vessel is a pressure vessel that has at least one curved portion that is configured to structurally deform (e.g., bend, shear, elongate, etc.) based on a pressure difference between a cavity pressure in a cavity in which at least a portion of the pressure vessel is suspended and a vessel pressure in the pressure vessel.


Patent
Kionix Inc. | Date: 2017-07-05

Techniques are described herein that perform pressure sensing using pressure sensor(s) that include deformable pressure vessel(s). A pressure vessel is an object that has a cross section that defines a void. A deformable pressure vessel is a pressure vessel that has at least one curved portion that is configured to structurally deform (e.g., bend, shear, elongate, etc.) based on a pressure difference between a cavity pressure in a cavity in which at least a portion of the pressure vessel is suspended and a vessel pressure in the pressure vessel.


A method for compensating for a misalignment angle between an accelerometer and a magnetometer includes applying a corrective rotation to collected accelerometer data or magnetometer data based on an estimated misalignment angle between an axis of the accelerometer and an axis of the magnetometer. The method further includes estimating a gravity vector using the corrected accelerometer data and estimating a magnetic field vector using the corrected magnetometer data. Additionally, the method includes calculating a characteristic that is a function of a calculated angle between the estimated gravity vector and the estimated magnetic field. The method also includes calculating a figure of merit over the plurality of times that is a function of the characteristic, and dynamically adjusting the estimated misalignment angle during ordinary use of the electronic device such that the figure of merit converges to a value as the electronic device rotates.


Patent
Kionix Inc. | Date: 2013-03-04

A calibration unit, system, and method for calibrating a device under test are provided. The calibration unit, system, and method use a single axis rotational unit to calibrate devices under test on a test head. The single axis rotation unit is configured to extend at an angle from a known axis. The test head can be designed in the shape of a frustum with multiple sides. The calibration unit, system, and method can use combinations of gravitational excitation, Helmholtz coil excitation, and rotational rate excitation for calibrating the device under test. The calibration unit, system, and method can calibrate a 3 degree for freedom or higher MEMS devices.


Patent
Kionix Inc. | Date: 2015-05-13

A gyroscope includes a resonator, a transducer, and a comparator. The comparator is designed to receive an input signal from the transducer and compare the input signal with a reference signal to produce an output signal. Rising and falling edge transitions of the output signal are substantially synchronized with a motion of the resonator along a sense-axis of the transducer.


Techniques are described herein that perform capacitance-based pressure sensing using pressure vessel(s). A pressure vessel is an object that has a cross section that defines a void. The void has a shape that is configured to change based on a change of pressure difference between a cavity pressure in a cavity in which at least a portion of the pressure vessel is suspended and a vessel pressure in the pressure vessel. The pressure vessel may be formed in the shape of an enclosed loop (e.g., along a path that is perpendicular to the cross section), resulting in a looped pressure vessel. For instance, an end of the pressure vessel may be connected to another end of the pressure vessel to form the enclosed loop.


A system and method for estimating angular velocity are provided. The system and method use an accelerometer and magnetometer to estimate an angular velocity in place of a gyroscope in 9-axis sensor fusion to estimate angular orientation. The final angular velocity estimate is constructed from two partially independent angular velocity estimates, one using only magnetometer measurements and the other using only accelerometer measurements. The unobservable portion of each partial angular velocity estimate is provided by a projection from a third complete estimate that uses both accelerometer and magnetometer data.


Disclosed are systems, methods, and computer program products for electronic systems with through-substrate interconnects and mems device. An interconnect formed in a substrate having a first surface and a second surface, the interconnect includes: a bulk region; a via extending from the first surface to the second surface; an insulating structure extending through the first surface into the substrate and defining a closed loop around the via, wherein the insulating structure comprises a seam portion separated by at least one solid portion; and an insulating region extending from the insulating structure toward the second surface, the insulating region separating the via from the bulk region, wherein the insulating structure and insulating region collectively provide electrical isolation between the via and the bulk region.


Patent
Kionix Inc. | Date: 2013-03-15

A method for calibrating an accelerometer of an electronic device to reduce an error of the accelerometer includes estimating a gravity vector using the accelerometer and a magnetic field vector using a magnetometer at a plurality of times. The method also includes calculating a characteristic that is a function of an angle between the estimated gravity vector and the estimated magnetic field at each of the plurality of times. Additionally, the method includes calculating a figure of merit over the plurality of times that is a function of the characteristic. The method includes dynamically adjusting a calibration parameter of the accelerometer during ordinary use of the electronic device such that the figure of merit is minimized. Adjusting the calibration parameter reduces the error of the accelerometer. A system can include a accelerometer, a magnetometer, a processor, and a memory having instructions to execute the calibration method on the processor.


Patent
Kionix Inc. | Date: 2014-08-29

Techniques are described herein that perform pressure sensing using pressure sensor(s) that include deformable pressure vessel(s). A pressure vessel is an object that has a cross section that defines a void. A deformable pressure vessel is a pressure vessel that has at least one curved portion that is configured to structurally deform (e.g., bend, shear, elongate, etc.) based on a pressure difference between a cavity pressure in a cavity in which at least a portion of the pressure vessel is suspended and a vessel pressure in the pressure vessel.

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