Patents by Inventor Dehong Liu
Dehong Liu 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: 11931208Abstract: The present application discloses a cerebral perfusion state classification apparatus and method, a device, and a storage medium. The method includes: acquiring, by a transceiving module, cervical blood flow data from an ultrasound data collecting device; determining, by a processor, cerebral perfusion data corresponding to the cervical blood flow data based on the cervical blood flow data and a mapping relationship between the cervical blood flow data and the cerebral perfusion data, and classifying cerebral perfusion states of a plurality of brain regions based on blood perfusion characteristics of the plurality of brain regions in the cerebral perfusion data.Type: GrantFiled: May 20, 2022Date of Patent: March 19, 2024Assignee: BEIJING FRIENDSHIP HOSPITAL, CAPITAL MEDICAL UNIVERSITYInventors: Zhenchang Wang, Wei Zheng, Han Lv, Pengling Ren, Dehong Luo, Linkun Cai, Yawen Liu, Hongxia Yin, Pengfei Zhao, Jing Li, Dong Liu, Erwei Zhao, Tingting Zhang
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Patent number: 11921161Abstract: A computer-implemented method is provided for detecting broken bar faults of an induction motor during operations.Type: GrantFiled: September 14, 2021Date of Patent: March 5, 2024Assignee: Mitsubishi Electric Research Laboratories, Inc.Inventors: Dehong Liu, Zhe Zhang
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Patent number: 11842504Abstract: Systems and methods for image processing for determining a registration map between a first image of a scene with a second image of the scene, include solving an optimal transport (OT) problem to produce the registration map by optimizing a cost function that determines a minimum of a ground cost distance between the first and the second images modified with an epipolar geometry-based regularizer including a distance that quantifies the violation of an epipolar geometry constraint between corresponding points defined by the registration map. The ground cost compares a ground cost distance of features extracted within the first image with a ground cost distance of features extracted from the second image.Type: GrantFiled: August 13, 2021Date of Patent: December 12, 2023Assignee: Mitsubishi Electric Research Laboratories, Inc.Inventors: Yanting Ma, Dehong Liu, Petros Boufounos, Philip Orlik
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Patent number: 11789142Abstract: A radar image processing device is provided for generating a radar image from a region of interest (ROI). The radar image processing device receives transmitted radar pulses and radar echoes reflected from the ROI at different positions along a path of a moving radar platform and stores computer-executable programs including a range compressor, a graph modeling generator, a signal aligner, a radar imaging generator and a focused image generator.Type: GrantFiled: June 11, 2020Date of Patent: October 17, 2023Assignee: MITSUBISHI ELECTRIC RESEARCH LABORATORIES INC.Inventors: Dehong Liu, Siheng Chen, Petros Boufounos
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Publication number: 20230288481Abstract: A computer-implemented method is provided for detecting broken bar faults of an induction motor during operations. The method includes steps of injecting a frequency modulation continuous wave (FMCW) voltage signal to the voltage source to power the motor, acquiring, in a time domain, a signal of a stator current powering the induction motor via an interface, performing Fourier Transform (FT) on the stator current and the injected FMCW signal to get spectra of the stator current and the injected signal, computing cross correlation between the spectrum of injected signal and the spectrum of stator current, extracting a fault signature at frequency f=±2(1?s)f0 in the cross-correlation function, and detecting a broken-bar fault in the induction motor if the fault signature magnitude is greater than a threshold.Type: ApplicationFiled: March 13, 2022Publication date: September 14, 2023Applicant: Mitsubishi Electric Research Laboratories, Inc.Inventor: Dehong Liu
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Patent number: 11635394Abstract: A permittivity sensor, for determining an image of a distribution of permittivity of a material of an object in a scene, comprising an input interface, a hardware processor, and an output interface is provided. The input interface is configured to accept phaseless measurements of propagation of a known incident field through the scene and scattered by the material of the object in the scene. The hardware processor is configured to solve a multi-variable minimization problem over unknown phases of the phaseless measurements and unknown image of the permittivity of the material of the object by minimizing a difference of a nonlinear function of the known incident field and the unknown image with a product of known magnitudes of the phaseless measurements and the unknown phases. Further, the output interface is configured to render the permittivity of the material of the object provided by the solution of the multi-variable minimization problem.Type: GrantFiled: February 10, 2020Date of Patent: April 25, 2023Assignee: Mitsubishi Electric Research Laboratories, Inc.Inventors: Yanting Ma, Muhammad Asad Lodhi, Hassan Mansour, Petros Boufounos, Dehong Liu
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Publication number: 20230080835Abstract: A computer-implemented method is provided for detecting broken bar faults of an induction motor during operations.Type: ApplicationFiled: September 14, 2021Publication date: March 16, 2023Applicant: Mitsubishi Electric Research Laboratories, Inc.Inventors: Dehong Liu, Zhe Zhang
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Publication number: 20230052582Abstract: Systems and methods for image processing for determining a registration map between a first image of a scene with a second image of the scene, include solving an optimal transport (OT) problem to produce the registration map by optimizing a cost function that determines a minimum of a ground cost distance between the first and the second images modified with an epipolar geometry-based regularizer including a distance that quantifies the violation of an epipolar geometry constraint between corresponding points defined by the registration map. The ground cost compares a ground cost distance of features extracted within the first image with a ground cost distance of features extracted from the second image.Type: ApplicationFiled: August 13, 2021Publication date: February 16, 2023Applicant: Mitsubishi Electric Research Laboratories, Inc.Inventors: Yanting Ma, Dehong Liu, Petros Boufounos, Philip Orlik
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Patent number: 11502564Abstract: A motor comprising a shaft, an array of stator assemblies rigidly attached to the shaft, each stator assembly includes a stator yoke having a toroid shape fixed around the shaft and having a number of slots at radial and axis directional faces with windings within the slots of the stator yoke, and a rotor assembly rotatively attached to the shaft to enclose the array of stator assemblies, the rotor assembly has a rotor drum with sections, each section embraces one stator assembly, each section has two axial-flux permanent magnet arrays attached on axial-directional inner surfaces of the section and has one radial-flux permanent magnet array attached on a radial-directional inner surface of the section furthest from the shaft, wherein the axial-flux and the radial-flux permanent magnet arrays with the number of pole pairs equals the number of the stator slots plus or minus the number of stator winding pole pair.Type: GrantFiled: April 3, 2020Date of Patent: November 15, 2022Assignee: Mitsubishi Electric Research Laboratories, Inc.Inventors: Lei Zhou, Bingnan Wang, Chungwei Lin, Dehong Liu, Yebin Wang, Koon Hoo Teo
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Patent number: 11481876Abstract: Systems, methods and apparatus for image processing for reconstructing a super resolution image from multispectral (MS) images. Receive image data and initialize a fused image using a panchromatic (PAN) image, and estimate a blur kernel between the PAN image and the MS images as an initialization function. Iteratively, fuse a MS image with an associated PAN image of a scene using a fusing algorithm. Each iteration includes: update the blur kernel based on a Second-Order Total Generalized Variation function to regularize a kernel shape; fuse the PAN image and MS images with the updated blur kernel based on a local Laplacian prior function to regularize the high-resolution information to obtain an estimated fused image; compute a relative error between the estimated fused image of the current iteration and a previous estimated fused image from a previous iteration, to a predetermined threshold, to stop iterations stop, to obtain a PAN-sharpened image.Type: GrantFiled: April 8, 2020Date of Patent: October 25, 2022Assignee: Mitsubishi Electric Research Laboratories, Inc.Inventors: Dehong Liu, Lantao Yu, Yanting Ma, Hassan Mansour, Petros Boufounos
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Publication number: 20220318948Abstract: An image forming system for constructing a whole large image of an object is provided. The image forming system includes an interface configured to sequentially acquire images of partial areas of the object obtained by a camera, wherein two adjacent images of the partial areas include overlap portions, wherein the sequential images correspond to a three dimensional (3D) surface of the object, wherein the geometrical information (geometrical parameters) of the object is provided, wherein an initial pose of the camera is provided.Type: ApplicationFiled: March 27, 2021Publication date: October 6, 2022Applicant: Mitsubishi Electric Research Laboratories, Inc.Inventors: Dehong Liu, Laixi Shi
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Patent number: 11428612Abstract: A measurement device is configured to set an observation surface on a surface of a structure as a measurement surface to measure a change of the measurement surface as a measurement surface change vector. An estimator is configured to generate an estimation model based on a shape model obtained by modeling a shape of the structure. The estimator is configured to acquire a coefficient vector by solving a norm minimization problem by setting, as parameters, a measurement surface change vector and a part of the estimation model. The coefficient vector forms a sparse solution. The estimator is configured to estimate a change of a crack occurrence surface by determining a candidate surface, which is inside the structure and assumed to have a crack, as the crack occurrence surface, based on the coefficient vector and another part of the estimation model.Type: GrantFiled: September 16, 2020Date of Patent: August 30, 2022Assignees: MITSUBISHI ELECTRIC CORPORATION, MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.Inventors: Norihiko Hana, Masao Akiyoshi, Dehong Liu
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Publication number: 20220114713Abstract: An image processing method for measuring displacement of an object comprising is provided. The method includes acquiring first sequential images and second sequential images, wherein two adjacent images of the first sequential images include first overlap portions, wherein two adjacent images of the second sequential images include second overlap portions, wherein the first sequential images correspond to a first three dimensional (3D) surface on the object at a first state and the second sequential images correspond to a second 3D surface on the object at a second state.Type: ApplicationFiled: January 14, 2021Publication date: April 14, 2022Inventors: Dehong Liu, Laixi Shi, Masaki Umeda, Norihiko Hana
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Publication number: 20220082482Abstract: A measurement device is configured to set an observation surface on a surface of a structure as a measurement surface to measure a change of the measurement surface as a measurement surface change vector. An estimator is configured to generate an estimation model based on a shape model obtained by modeling a shape of the structure. The estimator is configured to acquire a coefficient vector by solving a norm minimization problem by setting, as parameters, a measurement surface change vector and a part of the estimation model. The coefficient vector forms a sparse solution. The estimator is configured to estimate a change of a crack occurrence surface by determining a candidate surface, which is inside the structure and assumed to have a crack, as the crack occurrence surface, based on the coefficient vector and another part of the estimation model.Type: ApplicationFiled: September 16, 2020Publication date: March 17, 2022Applicants: MITSUBISHI ELECTRIC CORPORATION, MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.Inventors: Norihiko HANA, Masao AKIYOSHI, Dehong LIU
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Publication number: 20220069701Abstract: A controller is provided for generating carrier signals for a PWM generator controlling an inverter driving an electric actuator to reduce the EMI level of the inverter. The controller includes an interface configured to connect to the inverter, a memory configured to store a measured electromagnetic-interference (EMI) spectrum, a desired EMI spectrum and an EMI suppression rate program, and a processor. The processor is, in connection with the memory, configured to computing EMI suppression rates for a frequency range, wherein the EMI suppression determined adaptively by the measured EMI spectrum and the desired EMI spectrum, computing sweep duration of discrete frequency, wherein the sweep duration is determined by the EMI suppression rate of the discrete frequency, and a modulator configured to modulate the carrier signals based on the sweep durations of carrier frequencies and to transmit the modulated carrier signals to the PWM generator to generate PWM signals for the inverter.Type: ApplicationFiled: September 29, 2020Publication date: March 3, 2022Applicants: Mitsubishi Electric CorporationInventors: Dehong Liu, Retsu Sugawara, Philip Orlik
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Patent number: 11258357Abstract: A controller is provided for generating carrier signals for a PWM generator controlling an inverter driving an electric actuator to reduce the EMI level of the inverter. The controller includes an interface configured to connect to the inverter, a memory configured to store a measured electromagnetic-interference (EMI) spectrum, a desired EMI spectrum and an EMI suppression rate program, and a processor. The processor is, in connection with the memory, configured to computing EMI suppression rates for a frequency range, wherein the EMI suppression determined adaptively by the measured EMI spectrum and the desired EMI spectrum, computing sweep duration of discrete frequency, wherein the sweep duration is determined by the EMI suppression rate of the discrete frequency, and a modulator configured to modulate the carrier signals based on the sweep durations of carrier frequencies and to transmit the modulated carrier signals to the PWM generator to generate PWM signals for the inverter.Type: GrantFiled: September 29, 2020Date of Patent: February 22, 2022Assignees: Mitsubishi Electric Research Laboratories, Inc., Mitsubishi Electric CorporationInventors: Dehong Liu, Retsu Sugawara, Philip Orlik
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Patent number: 11204317Abstract: A tomographic imaging system receives measurements at a set of frequencies of a wavefield scattered by an internal structure of an object, recursively reconstructs an image of the internal structure of the object until a termination condition is met, and renders the reconstructed image. For a current iteration, the system adds a frequency to a previous set of frequencies used during a previous iteration to produce a current set of frequencies, such that the added frequency is higher than any frequency in the previous set of frequencies, and reconstructs a current image of the internal structure of the object that minimizes a difference between a portion of the scattered wavefield measured at the current set of frequencies and a wavefield synthetized from the current image. A previous image determined during the previous iteration initializes the reconstruction of the current image.Type: GrantFiled: February 26, 2019Date of Patent: December 21, 2021Assignee: Mitsubishi Electric Research Laboratories, Inc.Inventors: Hassan Mansour, Ajinkya Kadu, Petros Boufounos, Dehong Liu
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Publication number: 20210389450Abstract: A radar image processing device is provided for generating a radar image from a region of interest (ROI). The radar image processing device receives transmitted radar pulses and radar echoes reflected from the ROI at different positions along a path of a moving radar platform and stores computer-executable programs including a range compressor, a graph modeling generator, a signal aligner, a radar imaging generator and a focused image generator.Type: ApplicationFiled: June 11, 2020Publication date: December 16, 2021Inventors: Dehong Liu, Siheng Chen, Petros Boufounos
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Publication number: 20210319534Abstract: Systems, methods and apparatus for image processing for reconstructing a super resolution image from multispectral (MS) images. Receive image data and initialize a fused image using a panchromatic (PAN) image, and estimate a blur kernel between the PAN image and the MS images as an initialization function. Iteratively, fuse a MS image with an associated PAN image of a scene using a fusing algorithm. Each iteration includes: update the blur kernel based on a Second-Order Total Generalized Variation function to regularize a kernel shape; fuse the PAN image and MS images with the updated blur kernel based on a local Laplacian prior function to regularize the high-resolution information to obtain an estimated fused image; compute a relative error between the estimated fused image of the current iteration and a previous estimated fused image from a previous iteration, to a predetermined threshold, to stop iterations stop, to obtain a PAN-sharpened image.Type: ApplicationFiled: April 8, 2020Publication date: October 14, 2021Applicant: Mitsubishi Electric Research Laboratories, Inc.Inventors: Dehong Liu, Lantao Yu, Yanting Ma, Hassan Mansour, Petros Boufounos
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Publication number: 20210313851Abstract: A motor comprising a shaft, an array of stator assemblies rigidly attached to the shaft, each stator assembly includes a stator yoke having a toroid shape fixed around the shaft and having a number of slots at radial and axis directional faces with windings within the slots of the stator yoke, and a rotor assembly rotatively attached to the shaft to enclose the array of stator assemblies, the rotor assembly has a rotor drum with sections, each section embraces one stator assembly, each section has two axial-flux permanent magnet arrays attached on axial-directional inner surfaces of the section and has one radial-flux permanent magnet array attached on a radial-directional inner surface of the section furthest from the shaft, wherein the axial-flux and the radial-flux permanent magnet arrays with the number of pole pairs equals the number of the stator slots plus or minus the number of stator winding pole pair.Type: ApplicationFiled: April 3, 2020Publication date: October 7, 2021Applicant: Mitsubishi Electric Research Laboratories, Inc.Inventors: Lei Zhou, Bingnan Wang, Chungwei Lin, Dehong Liu, Yebin Wang, Koon Hoo Teo