Patents by Inventor Xiuhong Sun
Xiuhong Sun has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9906111Abstract: A set of symmetrically segmented square prism Permanent Magnet (PM) halves in a 45-45-90 triangular prism and a rectangular square prism with predefined 45° stepped magnetizations are designed as Fine Elements (FEs), bringing finely adaptive mosaicking advantages for array arrangement. Optimized Halbach effect FE PM pole modules in cuboidal and isosceles trapezoidal prism shapes are invented to provide an augmented one-side-operating field. Simulation data show that typical dual layer FE PM arrays generate high-fidelity sinusoidal waveforms within air-gaps with peak field strengths of up to 1.2 Tesla. Featuring a pole width-to-thickness ratio ranging from 1 to 6, FE PM motor tracks with a series of scale, format, and sectional features are constructed in lightweight ferrous and/or nonferrous structures, which energize OEM and/or FE current carrying winding coils to implement linear and curvilinear motors with high power/force/torque density and low force ripple.Type: GrantFiled: August 20, 2015Date of Patent: February 27, 2018Inventors: Xiuhong Sun, Andrew Sun
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Publication number: 20160111948Abstract: A set of symmetrically segmented square prism Permanent Magnet (PM) halves in a 45-45-90 triangular prism and a rectangular square prism with predefined 45° stepped magnetizations are designed as Fine Elements (FEs), bringing finely adaptive mosaicking advantages for array arrangement. Optimized Halbach effect FE PM pole modules in cuboidal and isosceles trapezoidal prism shapes are invented to provide an augmented one-side-operating field. Simulation data show that typical dual layer FE PM arrays generate high-fidelity sinusoidal waveforms within air-gaps with peak field strengths of up to 1.2 Tesla. Featuring a pole width-to-thickness ratio ranging from 1 to 6, FE PM motor tracks with a series of scale, format, and sectional features are constructed in lightweight ferrous and/or nonferrous structures, which energize OEM and/or FE current carrying winding coils to implement linear and curvilinear motors with high power/force/torque density and low force ripple.Type: ApplicationFiled: August 20, 2015Publication date: April 21, 2016Inventors: Xiuhong Sun, Andrew Sun
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Patent number: 8803467Abstract: A partial arc servomotor assembly having a curvilinear U-channel with two parallel rare earth permanent magnet plates facing each other and a pivoted ironless three phase coil armature winding moves between the plates. An encoder read head is fixed to a mounting plate above the coil armature winding and a curvilinear encoder scale is curved to be co-axis with the curvilinear U-channel permanent magnet track formed by the permanent magnet plates. Driven by a set of miniaturized power electronics devices closely looped with a positioning feedback encoder, the angular position and velocity of the pivoted payload is programmable and precisely controlled.Type: GrantFiled: October 14, 2011Date of Patent: August 12, 2014Assignee: The Keyw CorporationInventor: Xiuhong Sun
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Patent number: 8462209Abstract: A portable, aerial, dual-swath photogrammetric imaging system comprising twin nadir pointing CCD cameras for simultaneously acquiring twin adjacent digital images for merging into a large panorama. A pair of lens shifters symmetrically shift twin images to the left and right sides of the focal points of two parallel lenses to extend imaging swathwidth. The twin adjacent images of the imaging system have a strip of narrow overlap at the center of the whole scene that are reserved for photogrammetric processing and stitching twin images into a seamless panorama. Each camera is connected to an embedded computer which controls imaging data acquisition, attaches GPS/IMU measurements, generates KML metadata files for its snapshots, and stores acquired images and metadata into removable SSDs. Direct geo-referenced panoramic digital stills are immediately registered on to Google™ Earth precisely. Its images can be further processed for advanced mapping, change detection and GIS applications.Type: GrantFiled: June 26, 2009Date of Patent: June 11, 2013Assignee: Keyw CorporationInventor: Xiuhong Sun
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Publication number: 20120206081Abstract: A partial arc servomotor assembly having a curvilinear U-channel with two parallel rare earth permanent magnet plates facing each other and a pivoted ironless three phase coil armature winding moves between the plates. An encoder read head is fixed to a mounting plate above the coil armature winding and a curvilinear encoder scale is curved to be co-axis with the curvilinear U-channel permanent magnet track formed by the permanent magnet plates. Driven by a set of miniaturized power electronics devices closely looped with a positioning feedback encoder, the angular position and velocity of the pivoted payload is programmable and precisely controlled.Type: ApplicationFiled: October 14, 2011Publication date: August 16, 2012Applicant: THE KEYW CORPORATIONInventor: Xiuhong Sun
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Publication number: 20100328499Abstract: A portable, aerial, dual-swath photogrammetric imaging system comprising twin nadir pointing CCD cameras for simultaneously acquiring twin adjacent digital images for merging into a large panorama. A pair of lens shifters symmetrically shift twin images to the left and right sides of the focal points of two parallel lenses to extend imaging swathwidth. The twin adjacent images of the imaging system have a strip of narrow overlap at the center of the whole scene that are reserved for photogrammetric processing and stitching twin images into a seamless panorama. Each camera is connected to an embedded computer which controls imaging data acquisition, attaches GPS/IMU measurements, generates KML metadata files for its snapshots, and stores acquired images and metadata into removable SSDs. Direct geo-referenced panoramic digital stills are immediately registered on to Google™ Earth precisely. Its images can be further processed for advanced mapping, change detection and GIS applications.Type: ApplicationFiled: June 26, 2009Publication date: December 30, 2010Applicant: FLIGHT LANDATA, INC.Inventor: XIUHONG SUN
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Patent number: 7149366Abstract: A compact high-definition hyperspectral imaging system (HDHIS) for light aircraft remote sensing to perform concurrent pushbroom hyperspectral imaging and high-resolution photographic imaging. The HDHIS comprises a sensor head having a hyperspectral scanner and a CCD digital camera. An airborne computer interfaces with the sensor head to provide data acquisition including hyperspectral quick view images and control functions. An alternative embodiment includes combining the HDHIS with a computerized airborne multi-camera imaging system (CAMIS) which comprises four progressive scan (CCD) cameras attached to a set of interchangeable, interference filters, to provide a triple spectral imaging system that can be operated by one person on a light aircraft.Type: GrantFiled: September 11, 2002Date of Patent: December 12, 2006Assignee: Flight Landata, Inc.Inventor: Xiuhong Sun
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Patent number: 7019777Abstract: A spatial resolution enhancement and dynamic range extension for a Computerized Airborne Multicamera Imaging System (CAMIS). CAMIS is a multispectral imaging system for diverse manned and unmanned aerial vehicles to fly along flexible paths and altitudes for a wide variety of applications. CAMIS comprises four spectral bands of progressive scan CCD video cameras with 782×576 square pixels each, giving a total of 1.82 million effective pixels. These cameras are synchronized and aligned in parallel with sub-pixel-accurate spatial offsets over a common field of view. A software procedure interpolates the original four-band 782×576 captures into 1564×1152 ones using a bi-linear algorithm, and then performs geometric correction and band-to-band pixel registration. The result is a more precisely registered, spatial resolution enhanced multispectral image, sized 1540(H) ×1140(V)×4(Bytes).Type: GrantFiled: April 19, 2001Date of Patent: March 28, 2006Assignee: Flight Landata, Inc.Inventor: Xiuhong Sun
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Publication number: 20020012071Abstract: A spatial resolution enhancement and dynamic range extension for a Computerized Airborne Multicamera Imaging System (CAMIS). CAMIS is a multispectral imaging system for diverse manned and unmanned aerial vehicles to fly along flexible paths and altitudes for a wide variety of applications. CAMIS comprises four spectral bands of progressive scan CCD video cameras with 782 x 576 square pixels each, giving a total of 1.82 million effective pixels. These cameras are synchronized and aligned in parallel with sub-pixel-accurate spatial offsets over a common field of view. A software procedure interpolates the original four-band 782×576 captures into 1564×1152 ones using a bi-linear algorithm, and then performs geometric correction and band-to-band pixel registration. The result is a more precisely registered, spatial resolution enhanced multispectral image, sized 1540(H) ×1140(V) ×4(Bytes).Type: ApplicationFiled: April 19, 2001Publication date: January 31, 2002Inventor: Xiuhong Sun
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Computerized component variable interference filter imaging spectrometer system method and apparatus
Patent number: 6211906Abstract: A miniature, computerized component, variable interference imaging spectrometer (C2VIFIS) system for airborne remote sensing data acquisition with a two dimensional field of view. An alternating staring/scanning method is used to optimize a pushbroom hyperspectral image data set with a photogrammetric reference. Synchronized CCD-imager sensor modules or cameras are aligned to a common field of view. One imager module has a visible range variable interference filter on its surface, a second imager module has a near-infrared range variable interference filter on its surface, and a third imager module has a bandbase filter attached to the imager. Video data from the three sensor modules is digitized and recorded in real time. Further, such video data is monitored by a computer and used to control the shutter exposure of each of the three sensor imager modules. Wavelength spectral image data and directional spectral image data are acquired by a single pass over a target area.Type: GrantFiled: October 2, 1998Date of Patent: April 3, 2001Assignee: Flight Landata, Inc.Inventor: Xiuhong Sun -
Patent number: 5790188Abstract: A spectrally-filtered, miniature, imaging spectrometer system for airborne remote sensing data acquisition with a two dimensional field of view. Synchronized CCD-imager sensor modules or cameras are aligned to a common field of view. One sensor module has a visible range variable interference filter on its surface and a second module has a near-infrared range variable interference filter on its surface. Video data from the three sensor modules is combined and recorded on a single analog or digital recorder. Futher, such video data is monitored by a computer and used to control the shutter speed of each of the three sensor modules. Wavelength spectral image data and directional spectral image data are acquired by a single pass over a target area. Post-processing of such data produces reconstructed track-recovery-images extracted from a sequence of video frames for the spectral regions of interest at a fixed column position to produce multiple bands of monochrome images.Type: GrantFiled: September 7, 1995Date of Patent: August 4, 1998Assignee: Flight Landata, Inc.Inventor: Xiuhong Sun