James P Jamieson

US Patent:

6542227, Apr 1, 2003

Filed:

Sep 4, 2001

Appl. No.:

09/946048

Inventors:

James R. Jamieson - Savage MN
Mark D. Ray - Burnsville MN
Clinton T. Meneely - Eagen MN

Assignee:

Rosemount Aerospace, Inc. - Burnsville MN

International Classification:

G01P 336

US Classification:

356 285, 356 28

Abstract:

A LIDAR system for measuring flow velocity in three axes comprises: a LIDAR arrangement of optical elements for generating a coherent beam of light and directing the coherent beam of light by at least one rotationally operated optical element from the system with a predetermined pattern, the at least one rotationally operated optical element also for receiving reflections from particles along the predetermined pattern and directing the beam reflections to a light detector which converts the beam reflections into representative electrical signals; and a processor for detecting bursts from the electrical signals which are representative of light beam reflections from at least one particle substantially at a corresponding position along the predetermined pattern, and for computing a Doppler frequency for each of a selected plurality of detected bursts from the signal content thereof. The processor also capable of associating the selected plurality of detected bursts with their corresponding positions along the predetermined pattern and for computing a three axis flow velocity measurement from at least three of the selected plurality of computed Doppler frequencies and their corresponding positions along the predetermined pattern. A method of measuring flow velocity in three axes is further disclosed.

US Patent:

6556282, Apr 29, 2003

Filed:

Sep 4, 2001

Appl. No.:

09/946057

Inventors:

James R. Jamieson - Savage MN
Mark D. Ray - Burnsville MN
Clinton T. Meneely - Eagen MN

Assignee:

Rosemount Aerospace, Inc. - Burnsville MN

International Classification:

G01C 308

US Classification:

356 401, 356 285, 3561411, 356 501, 359629

Abstract:

A combined system of a LOAS and a LIDAR system comprises: a LIDAR arrangement of optical elements for generating a first coherent beam of light at a first predetermined wavelength; a LOAS arrangement of optical elements for generating a second coherent beam of light at a second predetermined wavelength; a dichroic filter optical element for directing the first and second coherent beams of light substantially on a first common optical path towards an aperture of a beam expander; at least one output optical element which directs both of the expanded first and second coherent beams of light from the system, the at least one output optical element also for receiving and directing reflections of the first and second coherent beams of light to the beam expander wherein the beam reflections are collected; and wherein the dichroic filter optical element separates and directs the collected light corresponding to the first coherent beam back to the LIDAR arrangement of optical elements for use in determining flow velocity, and separates and directs the collected light corresponding to the second coherent beam back to the LOAS arrangement of optical elements for use in detecting at least one object.

US Patent:

6650407, Nov 18, 2003

Filed:

Sep 4, 2001

Appl. No.:

09/946058

Inventors:

James R. Jamieson - Savage MN
Mark D. Ray - Burnsville MN

Assignee:

Rosemount Aerospace Inc. - Burnesville MN

International Classification:

G02B 1126

US Classification:

3561411, 340961, 340963, 359212, 359220, 359221, 359223

Abstract:

A wide field scanning laser obstacle awareness system (LOAS) comprises: a plurality of first optical elements configured to direct a portion of a pulsed laser beam generated by a light source to a light detector, and to direct the pulsed laser beam to a beam expander wherein the pulsed laser beam is expanded; and at least one rotationally operated second optical element for directing the expanded pulsed laser beam from the system with a predetermined pattern scanned azimuthally over a wide field, the at least one rotationally operated second optical element also for receiving reflections of the pulsed laser beam from at least one object along the predetermined pattern and directing them to the laser beam expander wherein the laser beam reflections are focused; the plurality of first optical elements also configured to direct the focused laser beam reflections to the light detector for use in determining the location of the at least one object.

US Patent:

6665063, Dec 16, 2003

Filed:

Mar 28, 2002

Appl. No.:

10/109372

Inventors:

James R. Jamieson - Savage MN
Mark D. Ray - Burnsville MN

Assignee:

Rosemount Aerospace Inc. - Burnsville MN

International Classification:

G01B 1126

US Classification:

3561411, 356 401, 356 28, 356 285, 3561414

Abstract:

A distributed laser based obstacle awareness system for use on-board an aircraft comprises: a plurality of obstacle detecting sensors disposable at a corresponding plurality of locations of the aircraft for emitting laser energy from the aircraft into a predetermined region of space and for receiving return laser energy from an obstacle in the predetermined region of space; a laser source for emitting a laser beam along an optical path; and a plurality of bistatic optical channels. Each channel comprises a plurality of transmission fiber optic cables and at least one receiver fiber optic cable and extends from the laser source to a corresponding obstacle detecting sensor of the plurality to direct the laser beam from the optical path to its corresponding obstacle detecting sensor of the plurality for emission into the corresponding predetermined region of space; and a light detector. Return laser energy from an obstacle received by any one of the obstacle detecting sensors is propagated through the receiver fiber optic cable of the corresponding optical channel to the light detector for use in detection of the obstacle in the corresponding predetermined region of space. In one embodiment, an optical switch is disposed in the optical path to redirect the laser beam in a time sequence manner from the optical path to selected optical channels of the plurality.

US Patent:

6819265, Nov 16, 2004

Filed:

Aug 22, 2002

Appl. No.:

10/225610

Inventors:

James R. Jamieson - Savage MN
Mark D. Ray - Burnsville MN

Assignee:

Rosemount Aerospace Inc. - Burnsville MN

International Classification:

G08B 2100

US Classification:

340962, 342 26

Abstract:

An ice detection warning system mountable on board an aircraft for inflight monitoring of the airspace ahead of the aircraft comprises: a first plurality of optical elements configured to direct a pulsed laser beam at a first wavelength from a laser source into the airspace ahead of the aircraft; a second plurality of optical elements configured to separate received backscattering of light from the laser beam into a plurality of predetermined wavelengths; a plurality of light detectors for detecting the light of the separated plurality of wavelengths, respectively, and generating respectively corresponding plurality of electrical signals representative of the light detected thereby; and a processor for processing the plurality of electrical signals to determine if airspace conditions ahead of the aircraft are likely to cause ice accretion on the surface of the aircraft, and for generating a warning indicative thereof. In one embodiment, the warning system includes an optical scanner operative to scan the pulsed laser beam into the airspace ahead of the aircraft with a predetermined scan pattern, the scanner also being operative to receive the backscattering of light from the pulsed laser beam and direct it to the second plurality of optical elements which is configured to separate the received backscattering of light into the plurality of predetermined wavelengths.

US Patent:

6985212, Jan 10, 2006

Filed:

May 19, 2003

Appl. No.:

10/440918

Inventors:

James R. Jamieson - Savage MN, US
Mark D. Ray - Burnsville MN, US

Assignee:

Rosemount Aerospace Inc. - Burnsville MN

International Classification:

G01C 3/08
G01C 1/00
G01B 11/26

US Classification:

356 501, 35613903

Abstract:

A method of laser scanning a perimeter zone of a target site for the detection of potential threats comprises: scanning a pulsed laser beam across the perimeter zone; receiving echoes from the pulsed laser beam during the perimeter zone scan; deriving range data corresponding to the received echoes; determining position data of the received echoes in the perimeter zone; forming a scene image of a scan of the perimeter zone based on the range and position data of the received echoes thereof; repeating the steps of scanning, receiving, deriving, determining and forming for a plurality of perimeter zone scans to form scene images of each scan of the plurality; and comparing scene images of the plurality to detect a potential threat in the perimeter zone. In addition, a method of authenticating a potential threat detected in a perimeter zone of a target site comprises: detecting the potential threat and upon detection, interrogating the potential threat for a response by a wireless transmission; declaring the potential threat unauthorized if no response is transmitted wirelessly within a predetermined time interval from the interrogation; receiving the response, if transmitted, and determining if the response comprises a proper access code; and declaring the potential threat unauthorized if the received response is determined not to comprise the proper access code.

US Patent:

7026600, Apr 11, 2006

Filed:

Feb 26, 2004

Appl. No.:

10/789114

Inventors:

James R. Jamieson - Savage MN, US
Mark D. Ray - Burnsville MN, US
Clinton T. Meneely - Burnsville MN, US

Assignee:

Rosemount Aerospace Inc. - Burnsville MN

International Classification:

H01J 40/14

US Classification:

250221, 2505594

Abstract:

A method of identifying an object in a laser beam illuminated scene based on material types comprises the steps of: emitting a pulsed beam of laser energy, each beam pulse comprising a plurality of different discrete wavelength emission components; illuminating a predetermined scene with the pulsed beam; receiving return laser pulses from objects within the illuminated scene, each return laser pulse comprising return components corresponding to the plurality of different discrete wavelength emission components; determining spectral reflectance values for the plurality of return components of each return laser pulse; determining a material type for each return laser pulse of the illuminated scene based on the plurality of reflectance values of the corresponding return pulse; indexing each determined material type to a position in the illuminated scene; and identifying an object in the illuminated scene based on material types and indexed positions thereof in the scene. A counterpart system for carrying out the method is also disclosed.

US Patent:

7079228, Jul 18, 2006

Filed:

Apr 15, 2004

Appl. No.:

10/825062

Inventors:

James R. Jamieson - Savage MN, US
Gary E. Halama - Burnsville MN, US
Clinton T. Meneely - Burnsville MN, US

Assignee:

Rosemount Aerospace Inc. - Burnsville MN

International Classification:

G01P 3/64
G01C 3/20

US Classification:

356 285, 356 28, 356 406, 356 408

Abstract:

Combined laser-based apparatus for determining both altitude and ground velocity of an aircraft comprises: a laser source for emitting pulsed laser beams substantially at a predetermined wavelength; a plurality of first optical elements for directing the laser beams from a first optical path to a second optical path which exits the first optical elements; a plurality of second optical elements configured to form a telescope, the second optical path and telescope field of view being fixedly co-aligned; an optical scanner for directing the second optical path and telescope field of view to desired ground positions while maintaining the co-alignment thereof; the telescope for receiving Doppler wavelength shifted reflections of the pulsed laser beams and directing the received ground reflections substantially over a third optical path; an optical filter element for separating the ground reflections of the third optical path into first and second portions that are dependent on the Doppler wavelength shift of the ground reflections; and processing means for determining altitude and ground velocity of the aircraft based on the first and second portions.