Patents by Inventor CHENGHUA MAO

CHENGHUA MAO 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).

  • Patent number: 9883351
    Abstract: Disclosed is an indoor positioning device which comprises a base, a light source mounted on the base, a rotating part, a rotating outer shell and a controller; the rotating outer shell is a hemispherical shell body or a shell body being tangent externally with a hemispherical surface; a luminous point is located at a spherical center of the rotating outer shell; the rotating outer shell is divided into a plurality of encoded rings, each encoded ring is divided into a plurality of encoding bits, a angle ? of each encoding bit in a latitudinal direction is 360/N degrees, different encoded rings has different arrangements of encoding bits; in each encoded ring, some encoding bits are in a transparent state, there is no arrangement of two continuous opaque encoding bits, some encoding bits arranged in a specified style constitute a start bit or an end bit; once a light barrier of the rotating part passes through an optical coupler, the light source generates a frequency hopping; a receiver senses an optical signa
    Type: Grant
    Filed: October 15, 2015
    Date of Patent: January 30, 2018
    Assignee: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES
    Inventors: Guang Tan, Bo Xie, Chenghua Mao, Zhongkai Xiao
  • Publication number: 20170078852
    Abstract: Disclosed is an indoor positioning device which comprises a base, a light source mounted on the base, a rotating part, a rotating outer shell and a controller; the rotating outer shell is a hemispherical shell body or a shell body being tangent externally with a hemispherical surface; a luminous point is located at a spherical center of the rotating outer shell; the rotating outer shell is divided into a plurality of encoded rings, each encoded ring is divided into a plurality of encoding bits, a angle ? of each encoding bit in a latitudinal direction is 360/N degrees, different encoded rings has different arrangements of encoding bits; in each encoded ring, some encoding bits are in a transparent state, there is no arrangement of two continuous opaque encoding bits, some encoding bits arranged in a specified style constitute a start bit or an end bit; once a light barrier of the rotating part passes through an optical coupler, the light source generates a frequency hopping; a receiver senses an optical signa
    Type: Application
    Filed: October 15, 2015
    Publication date: March 16, 2017
    Inventors: Guang TAN, Bo XIE, Chenghua MAO, Zhongkai XIAO
  • Patent number: 9360310
    Abstract: The present disclosure relates to a multi-sensor indoor localization method and device. The method includes: an optical signal is received from a point light source using an optical sensor group having N optical sensors; the light intensity of the optical signal is obtained, the optical sensor group includes a polyhedron-shaped base where the normal vectors of each three faces are linearly independent, the N optical sensors are located on the faces of the base, and N?6; the current heading is obtained by a magnetic sensor group; a current unit normal vector is obtained; a system of at least three equations is established; the system of equations is solved to obtain an approximate solution of minimum residual, the approximate solution is regarded as the coordinates of the optical sensor group.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: June 7, 2016
    Assignee: Shenzhen Institute of Advanced Technology Chinese Academy of Sciences
    Inventors: Guang Tan, Bo Xie, Chenghua Mao
  • Publication number: 20150039262
    Abstract: The present disclosure relates to a multi-sensor indoor localization method and device. The method includes: an optical signal is received from a point light source using an optical sensor group having N optical sensors; the light intensity of the optical signal is obtained, the optical sensor group includes a polyhedron-shaped base where the normal vectors of each three faces are linearly independent, the N optical sensors are located on the faces of the base, and N?6; the current heading is obtained by a magnetic sensor group; a current unit normal vector is obtained; a system of at least three equations is established; the system of equations is solved to obtain an approximate solution of minimum residual, the approximate solution is regarded as the coordinates of the optical sensor group.
    Type: Application
    Filed: November 22, 2013
    Publication date: February 5, 2015
    Applicant: SHENZHEN INSTITUTES OF ADVANCED TECHNOLOGY CHINESE ACADEMY OF SCIENCES
    Inventors: GUANG TAN, BO XIE, CHENGHUA MAO