Duwain K Ake

Address:

3539 Eastmoor Dr, Dayton, OH 45431

Phone:

9374267031

VIN:

1G2MG35XX7Y126046

Make:

PONTIAC

Model:

SOLSTICE

Year:

2007

US Patent:

7012237, Mar 14, 2006

Filed:

Oct 29, 2003

Appl. No.:

10/695673

Inventors:

DuWain K. Ake - Beavercreek OH, US

Assignee:

Apache Technologies, Inc. - Dayton OH

International Classification:

H03F 3/08

US Classification:

250214A, 356 11

Abstract:

A modulated laser light detector that converts laser light energy into electrical signals which exhibit a frequency that is substantially the same as the laser light modulation frequency, in which these signals allow the detector unit to determine a position where the laser light is impacting upon a photodiode array. A synchronous rectifier circuit is provided which, by use of a phase locked loop, converts a full-wave analog signal representative of the modulated laser energy into a half-wave analog signal, which is filtered and demodulated to generate a DC level that is indicative of the strength of the received laser light energy. At least two channels of these signals are used to determine the impacting position of the laser light energy.

US Patent:

7323673, Jan 29, 2008

Filed:

Apr 28, 2006

Appl. No.:

11/414383

Inventors:

DuWain K. Ake - Beavercreek OH, US
Ayman Hajmousa - Dayton OH, US

Assignee:

Apache Technologies, Inc. - Dayton OH

International Classification:

G01J 1/44
H01J 40/14
H03F 3/08

US Classification:

250214R, 2502141, 708405, 398202, 702 77, 702 79, 702126

Abstract:

A modulated laser light detector that converts laser light energy into electrical signals which exhibit a frequency that is substantially the same as the laser light modulation frequency, in which these signals allow the detector unit to determine a position where the laser light is impacting upon a photodiode array. A superheterodyne receiver circuit is used to provide high gain at an improved signal-to-noise ratio to improve the range at which the modulated laser light signal can be reliably detected. Various types of signal detection circuits are available. Various processing algorithms are disclosed, including a Discrete Fourier Transform with a simplified computational algorithm for use with a low-power processor device.

US Patent:

7838808, Nov 23, 2010

Filed:

Jul 25, 2007

Appl. No.:

11/881121

Inventors:

DuWain K. Ake - Beavercreek OH, US

Assignee:

Trimble Navigation Limited - Sunnyvale CA

International Classification:

G01J 1/44
H01J 40/14
H03F 3/08

US Classification:

250214R, 250216, 3561411, 3561522

Abstract:

A modulated laser light detector that converts laser light energy into electrical signals which exhibit a frequency that is substantially the same as the laser light modulation frequency, in which these signals allow the detector unit to determine a position where the laser light is impacting upon a photodiode array. A superheterodyne receiver circuit is used to provide high gain at an improved signal-to-noise ratio to improve the range at which the modulated laser light signal can be reliably detected. Various types of signal detection circuits are available. Various processing algorithms are disclosed, including one which rejects laser light strikes that are due to reflections, rather than due to a direct strike from the laser transmitter.

US Patent:

49765388, Dec 11, 1990

Filed:

Oct 30, 1989

Appl. No.:

7/428624

Inventors:

DuWain K. Ake - Tipp City OH

Assignee:

Spectra-Physics, Inc. - San Jose CA

International Classification:

G01C 308
H01J 4014

US Classification:

356 4

Abstract:

A device for detecting and displaying the relative position of a generally horizontal reference plane of light, even when partial shading of the device occurs, produces a linear response that is independent of spot size and energy distribution. The device includes a photodetector means having first and second interdigitated photodetector elements positioned adjacent each other on the device. The first and second interdigitated photodetector elements provide first and second detection signals, respectively. A circuit means, responsive to the photodetector means, determines the relative levels of the first and second detection signals such that the position of the reference plane of light with respect to the detector device is determined. A display means, responsive to the circuit means, provides an indication of the position of the reference plane of light with respect to the detector device.

US Patent:

54866901, Jan 23, 1996

Filed:

Aug 29, 1994

Appl. No.:

8/297116

Inventors:

DuWain K. Ake - Tipp City OH

Assignee:

Apache Technologies, Inc. - Dayton OH

International Classification:

H01J 4014
G01C 308

US Classification:

2502061

Abstract:

A laser light detector is provided which can be used to detect pulsed laser light that is produced by a rotating laser light source on a construction job site. The laser light detector provides an easily-read display which is indicative of the present level or elevation of the laser light detector with respect to the plane of rotating laser light. The laser light detector has a very large dynamic range, while maintaining a very good signal-to-noise ratio, and can, therefore, be used at both short and long distances from the rotating laser light source. The laser light detector is not dependent upon the energy level received of laser light, or by the spot size of laser light as it reaches the light detectors. The laser light detector is available with several options, including dead band adjustment and audible indication of the elevation.

US Patent:

49078747, Mar 13, 1990

Filed:

Aug 5, 1988

Appl. No.:

7/228465

Inventors:

DuWain K. Ake - Huber Heights OH

Assignee:

Spectra-Physics, Inc. - San Jose CA

International Classification:

G01C 308
H01J 4014

US Classification:

356 4

Abstract:

A device for detecting and displaying the relative position of a generally horizontal reference plane of light. even when partial shading of the device occures, includes a photodetector means having including first and second interdigitated photodetector elements positioned adjacent each other on the device. The first and second interdigitated photodetector element provide first and second detection signals, respectively. A circuit means, responsive to the photodetector means, for determines the relative levels of the first and second detection signals such that the position of the reference plane of light with respect to the detector device is determined. A display means, responsive to the circuit means, for provides an indication of the position of the referece plane of light with respect to the detector device.

US Patent:

61339911, Oct 17, 2000

Filed:

Nov 16, 1998

Appl. No.:

9/192770

Inventors:

DuWain K. Ake - Tipp City OH

Assignee:

Apache Technologies, Inc. - Dayton OH

International Classification:

G01C 308
G01B 1126
H01L 2700

US Classification:

356 408

Abstract:

An improved photocell configuration is provided to create a more accurate laser receiver that not only is very accurate and flexible in its operational capabilities, but also can greatly reduce the effect of rotational offset due to shading of the photocell. In one embodiment, a very long photocell is provided in which multiple split-cells are used to present a geometry that will tend to negate some of the effects of shading. The shading effects are minimized by having a different active photocell area along each vertical edge of the photocell. In another embodiment, a "segmented" photocell is used, in which the split-cell design of a long photocell is also divided into vertical segments. These segments can be re-configured so that alternating segments comprise a mirror image about the longitudinal of the long photocell. Such an arrangement tends to reduce the effect of rotational offset due to shading to an extremely small percentage of error.

US Patent:

50005642, Mar 19, 1991

Filed:

Mar 9, 1990

Appl. No.:

7/491227

Inventors:

DuWain K. Ake - Tipp City OH

Assignee:

Spectra-Physics, Inc. - San Jose CA

International Classification:

G01C 300
G01C 308
G01B 1126

US Classification:

356 1

Abstract:

A laser beam three dimensional position measurement system includes a laser transmitter mounted at a stationary reference position at a work site and a receiver mounted on a mobile machine at the site. The transmitter produces a laser reference plane by sweeping a laser beam about the transmitter. The receiver includes two spaced apart laser beam detectors for measuring the horizontal angle of the incoming beam with respect to the face of the receiver at two spaced apart locations on the face of the receiver. The horizontal angles are used to determine the range of the receiver from the transmitter. The transmitter includes an azimuth device for providing signals to the receiver indicative of the azimuth angle at which the receiver is positioned with respect to a reference axis that extends from the transmitter. The receiver includes a decoder signal receiving device for receiving the angle signals from the transmitter in order to determine its azimuth angle.