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Johnson, Bloomington
Burgess Johnson, Bloomington, MN US
| Patent application number | Description | Published |
|---|---|---|
| 20090241662 | SYSTEMS AND METHODS FOR ACCELERATION AND ROTATIONAL DETERMINATION FROM AN OUT-OF-PLANE MEMS DEVICE - A Micro-Electro-Mechanical Systems (MEMS) inertial sensor systems and methods are operable to determine linear acceleration and rotation. An exemplary embodiment applies a first linear acceleration rebalancing force via a first electrode pair to a first proof mass, applies a second linear acceleration rebalancing force via a second electrode pair to a second proof mass, applies a first Coriolis rebalancing force via a third electrode pair to the first proof mass, applies a second Coriolis rebalancing force via a fourth electrode pair to the second proof mass, determines a linear acceleration corresponding to the applied first and second linear acceleration rebalancing forces, and determines a rotation corresponding to the applied first and second Coriolis rebalancing forces. | 10-01-2009 |
Burgess R. Johnson, Bloomington, MN US
| Patent application number | Description | Published |
|---|---|---|
| 20080236280 | FORCE REBALANCING AND PARAMETRIC AMPLIFICATION OF MEMS INERTIAL SENSORS - MEMS devices and methods for measuring Coriolis forces using force rebalancing and parametric gain amplification techniques are disclosed. A MEMS inertial sensor can include one or more proof masses, at least one sense electrode positioned adjacent to each proof mass, a number of torquer electrodes for electrostatically nulling quadrature and Coriolis-related proof mass motion, and a number of pump electrodes for producing a pumping force on the proof masses. Force rebalancing voltages can be applied to some torquer electrodes to electrostatically null quadrature and/or Coriolis-related proof mass motion along a sense axis of the device. A pumping voltage at approximately twice the motor drive frequency of the proof masses can be used to pump the proof masses along the sense axis. | 10-02-2008 |
| 20100147073 | SYSTEMS AND METHODS FOR AN INERTIAL SENSOR SUSPENSION THAT MINIMIZES PROOF MASS ROTATION - The present invention generally relates to systems and methods for an inertial sensor suspension that minimizes proof mass rotation and translation. The system contains a microelectromechanical sensor (MEMS) device for measuring rotation along an input rotation axis. The MEMS device includes at least one substrate, at least one proof mass, and a suspension system. The suspension system includes at least one flexure connecting the at least one proof mass to a substrate and at least one anchored suspension element with a split support beam having a first split portion and a second split portion. The first split portion and the second split portion are of curved shape. | 06-17-2010 |
| 20100244819 | MEMS GYROSCOPE MAGNETIC SENSITIVITY REDUCTION - A tuning fork gyroscope that is insensitive to magnetic field gradients is provided. The tuning fork gyroscope includes a first electrically conducting proof mass and a second electrically conducting proof mass connected through electrically conducting suspensions to anchors attached to one or more insulating substrates, and an electrical-resistance mid-point electrically connected to opposing ends of the first electrically conducting proof mass and to opposing ends of the second electrically conducting proof mass. The tuning fork gyroscope provides an input to a sense charge amplifier. The sense charge amplifier generates an output signal indicative of a rotation of the tuning fork gyroscope. The output signal is independent of a magnetic field gradient. | 09-30-2010 |
Dave Johnson, Bloomington, MN US
| Patent application number | Description | Published |
|---|---|---|
| 20080312664 | LEFT ATRIAL APPENDAGE CLOSURE - A medical device is disclosed for tissue, body lumen and/or cavity closure inside a body of a patient. In one particular application, the medical device can be used for minimally invasive access and closure of a left atrial appendage of the heart. The medical device generally includes a tool used for grasping the appendage, a closure member, and at least one tool to deploy, control, and position the closure member for closing the appendage. The device can also include an expander tool for expanding the working area around the left atrial appendage to improve visibility during the procedure. In other embodiments, the medical device may include other tools, for example an imaging tool for viewing the target area and/or other tools that are considered useful in a left atrial appendage closure procedure. | 12-18-2008 |
Gary L. Johnson, Bloomington, MN US
| Patent application number | Description | Published |
|---|---|---|
| 20090142260 | IN VIVO DETECTION OF APOPTOSIS - The invention provides methods and products, such as kits, useful for determining the apoptotic state of cells in an organism, comprising detecting the presence or abundance of at least one caspase affinity labeling agent in the cells of an animal into which at least one caspase affinity labeling agent has been introduced, wherein the presence or abundance of the caspase affinity labeling agent correlates with the apoptotic state of the cells. | 06-04-2009 |
Gregory A. Johnson, Bloomington, MN US
| Patent application number | Description | Published |
|---|---|---|
| 20100223211 | Decision service method and system - A real time decisioning service comprising a set of powerful tools accessible in ASP mode allowing an end user to create, configure, test, and deploy decision engines to automate real time decisions, comprising both expert and custom analytic models used within decision strategies, and comprising systems integration and strategy consulting is provided. An exemplary decision system is described. | 09-02-2010 |
Lyle H. Johnson, Bloomington, MN US
| Patent application number | Description | Published |
|---|---|---|
| 20090205415 | ROLL ORIENTATION USING TURNS-COUNTING FUZE - The present invention comprises a device for determining the roll orientation of a body with respect to a local fixed coordinate system or a predetermined reference vector. The device uses a measurement of an external magnetic field, such as the Earth's magnetic field, to determine a roll orientation reference with respect to the field or an uncompensated roll orientation. The uncompensated roll orientation is then adjusted according to a bias angle, such as an angular difference between the external magnetic field and a local fixed coordinate system, to determine the roll orientation of the device with respect to the local fixed coordinate system or a compensated roll angle. | 08-20-2009 |