Steven B Hunter

US Patent:

6349477, Feb 26, 2002

Filed:

Nov 1, 1999

Appl. No.:

09/431195

Inventors:

Steven L. Hunter - Livermore CA

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

G01C 906

US Classification:

3336614

Abstract:

An inclinometer utilizing synchronous demodulation for high resolution and electronic offset adjustment provides a wide dynamic range without any moving components. A device encompassing a tiltmeter and accompanying electronic circuitry provides quasi-leveled tilt sensors that detect highly resolved tilt change without signal saturation.

US Patent:

6370784, Apr 16, 2002

Filed:

Nov 1, 1999

Appl. No.:

09/431196

Inventors:

Steven L. Hunter - Livermore CA
Carl O. Boro - Milpitas CA
Alvis Farris - late of Byron CA

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

G01C 916

US Classification:

33395, 33365

Abstract:

A tiltmeter device having a pair of orthogonally disposed tilt sensors that are levelable within an inner housing containing the sensors. An outer housing can be rotated to level at least one of the sensor pair while the inner housing can be rotated to level the other sensor of the pair. The sensors are typically rotated up to about plus or minus 100 degrees. The device is effective for measuring tilts in a wide range of angles of inclination of wells and can be employed to level a platform containing a third sensor.

US Patent:

6382025, May 7, 2002

Filed:

Oct 15, 1999

Appl. No.:

09/419033

Inventors:

Steven L. Hunter - Livermore CA

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

G01P 1500

US Classification:

7351403, 7351409

Abstract:

A rate sensor for angular/rotational acceleration includes a housing defining a fluid cavity essentially completely filled with an electrolyte fluid. Within the housing, such as a toroid, ions in the fluid are swept during movement from an excitation electrode toward one of two output electrodes to provide a signal for directional rotation. One or more ground electrodes within the housing serve to neutralize ions, thus preventing any effect at the other output electrode.

US Patent:

20210206626, Jul 8, 2021

Filed:

Feb 26, 2021

Appl. No.:

17/187206

Inventors:

- Livermore CA, US
Princess CORRAL - Hayward CA, US
Steven L. HUNTER - Livermore CA, US
Phillip Harris PAUL - San Francisco CA, US

International Classification:

B81B 3/00
B81B 7/00
G01D 5/24

Abstract:

The present disclosure relates to a system for detecting movement of a microelectromechanical system (MEMS) device. The system uses a drive voltage signal source for generating a low frequency drive voltage signal for driving the MEMS device. An excitation signal source may be used for generating an excitation signal which is also applied to the MEMS device. The excitation signal has a frequency which is above a physical response capability of the MEMS device, such that operation of the MEMS device is not significantly affected by the excitation signal. A sensing impedance is used to help generate a signal which is responsive to the capacitance of the MEMS device. The capacitance of the MEMS device changes in response to movement of the MEMS device. An output subsystem is provided which responds to changes sensed by the sensing impedance, and which produces an output voltage signal. A filter filters the output voltage signal to produce a filtered output voltage signal. The filtered output voltage signal is indicative of a position of the MEMS device.

US Patent:

20180111854, Apr 26, 2018

Filed:

Oct 20, 2016

Appl. No.:

15/299021

Inventors:

- Livermore CA, US
Steven L. HUNTER - Livermore CA, US

International Classification:

C02F 1/469

Abstract:

The present disclosure relates to a capacitive deionization system which makes use of a controller, a first capacitor acting as a first electrode, a second capacitor acting as a second electrode, and a first inductor for storing energy received from the first capacitor, and transferring the stored energy to the second capacitor. A first plurality of electronic switches are controlled by the controller to control communication between the first inductor and the first capacitor, and between the first inductor and the second capacitor. An additional energy transfer subsystem is included which has a second inductor for receiving energy from the first capacitor while the first inductor is transferring stored energy to the second capacitor.