Patents by Inventor Jigui ZHU

Jigui ZHU 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: 11112270
    Abstract: The present invention discloses an attitude self-compensation method to the transmitters of wMPS based on inclinometer, including the following steps: step 1: arranging inclinometer-combined transmitters according to the mechanism structure of the transmitters; step 2: building a horizontal reference frame based on an automatic level and guide rail; step 3: calibrating rotation relationship between the inclinometer and transmitter coordinate systems by referring to the horizontal reference frame according to the measurement model of the inclinometer and rotation measurement model of the transmitter; step 4: updating the orientation parameters of the transmitters in real time according to the output values of the inclinometer and compensation algorithm for the orientation parameters. The method of the present invention aims at self-compensating the orientation parameters of transmitters in real time and increasing the stability of the system.
    Type: Grant
    Filed: December 25, 2017
    Date of Patent: September 7, 2021
    Assignee: Tianjin University
    Inventors: Jiarui Lin, Jigui Zhu, Yongjie Ren, Linghui Yang, Siyang Guo
  • Publication number: 20200378792
    Abstract: The present invention discloses an attitude self-compensation method to the transmitters of wMPS based on inclinometer, including the following steps: step 1: arranging inclinometer-combined transmitters according to the mechanism structure of the transmitters; step 2: building a horizontal reference frame based on an automatic level and guide rail; step 3: calibrating rotation relationship between the inclinometer and transmitter coordinate systems by referring to the horizontal reference frame according to the measurement model of the inclinometer and rotation measurement model of the transmitter; step 4: updating the orientation parameters of the transmitters in real time according to the output values of the inclinometer and compensation algorithm for the orientation parameters. The method of the present invention aims at self-compensating the orientation parameters of transmitters in real time and increasing the stability of the system.
    Type: Application
    Filed: December 25, 2017
    Publication date: December 3, 2020
    Applicant: Tianjin University
    Inventors: Jiarui LIN, Jigui Zhu, Yongjie Ren, Linghui Yang, Siyang Guo
  • Patent number: 10830575
    Abstract: The present invention discloses a synchronization method for multi-station data of dynamic coordinate measurement by a workshop measuring and positioning network. The method comprises the following steps of: determining a measuring and positioning space according to the in-situ measurement dimension, selecting locations for placing several transmitters, calibrating external parameters of the transmitters by a reference ruler, and establishing a measurement field; in a communication data packet of a signal processor, attaching local clock information into the angle information of each transmitter; and setting fixed time nodes on a time axis, and synchronizing data of different transmitters to corresponding time nodes so as to realize data synchronization.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: November 10, 2020
    Assignee: Tianjin University
    Inventors: Jigui Zhu, Linghui Yang, Yongjie Ren, Jiarui Lin, Ziyue Zhao
  • Patent number: 10801843
    Abstract: An indoor mobile robot position and posture measurement system based on photoelectric scanning and the measurement method thereof, the measurement system includes: a mobile robot (1) which is arranged with a laser transmitter (2), the peripheral of the laser transmitter (2) is provided with no less than three receivers (3) for receiving the light signals emitted by the laser transmitter (2), and at least one signal processor (4) connected to the receivers (3) for processing signals received by the receivers (3) to determine precise coordinates of the receivers in laser transmitter coordinate system, and a terminal computer (5) wirelessly connected with the signal processor (4) to determine the posture angle and the position of the mobile robot through the distances between the laser transmitter (2) and each receiver (3).
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: October 13, 2020
    Assignee: Tianjin University
    Inventors: Jigui Zhu, Yongjie Ren, Linghui Yang, Jiarui Lin, Zhe Huang
  • Publication number: 20180306571
    Abstract: The present invention discloses a synchronization method for multi-station data of dynamic coordinate measurement by a workshop measuring and positioning network. The method comprises the following steps of: determining a measuring and positioning space according to the in-situ measurement dimension, selecting locations for placing several transmitters, calibrating external parameters of the transmitters by a reference ruler, and establishing a measurement field; in a communication data packet of a signal processor, attaching local clock information into the angle information of each transmitter; and setting fixed time nodes on a time axis, and synchronizing data of different transmitters to corresponding time nodes so as to realize data synchronization.
    Type: Application
    Filed: May 26, 2016
    Publication date: October 25, 2018
    Applicant: Tianjin University
    Inventors: Jigui ZHU, Linghul YANG, Yongjie REN, Jiarui LIN, Ziyue ZHAO
  • Publication number: 20180216941
    Abstract: An indoor mobile robot position and posture measurement system based on photoelectric scanning and the measurement method thereof, the measurement system includes: a mobile robot (1) which is arranged with a laser transmitter (2), the peripheral of the laser transmitter (2) is provided with no less than three receivers (3) for receiving the light signals emitted by the laser transmitter (2), and at least one signal processor (4) connected to the receivers (3) for processing signals received by the receivers (3) to determine precise coordinates of the receivers in laser transmitter coordinate system, and a terminal computer (5) wirelessly connected with the signal processor (4) to determine the posture angle and the position of the mobile robot through the distances between the laser transmitter (2) and each receiver (3).
    Type: Application
    Filed: May 27, 2016
    Publication date: August 2, 2018
    Applicant: Tianjin University
    Inventors: Jigui ZHU, Yongjie REN, Linghui YANG, Jiarui LIN, Zhe HUANG
  • Patent number: 9658055
    Abstract: The present invention relates to an accuracy traceability method based on precision coordinates control network for workshop Measurement Positioning System, which includes the steps: setting a plurality of SMR (Spherically Mounted Retroreflector) nests and stations in the measurement space; forming a global control point by using SMR; measuring all the 3-d coordinates of global control points in all the laser tracker stations; using the range value measured by the laser tracker as constraints to calculate the 3-d coordinates of global control points by using the dynamic weighting method; arranging a plurality of transmitters and calibrating the transmitters in combination with precision coordinate control network; measuring all global control points and measured points simultaneously by using wMPS, and using the 3-d coordinates of global control points as the constraints for adjustment calculation to obtain the 3-d coordinates of the measured points.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: May 23, 2017
    Assignee: Tianjin University
    Inventors: Jigui Zhu, Jiarui Lin, Yongjie Ren, Linghui Yang, Yu Ren
  • Publication number: 20160265903
    Abstract: The present invention relates to an accuracy traceability method based on precision coordinates control network for workshop Measurement Positioning System, which includes the steps: setting a plurality of SMR (Spherically Mounted Retroreflector) nests and stations in the measurement space; forming a global control point by using SMR; measuring all the 3-d coordinates of global control points in all the laser tracker stations; using the range value measured by the laser tracker as constraints to calculate the 3-d coordinates of global control points by using the dynamic weighting method; arranging a plurality of transmitters and calibrating the transmitters in combination with precision coordinate control network; measuring all global control points and measured points simultaneously by using wMPS, and using the 3-d coordinates of global control points as the constraints for adjustment calculation to obtain the 3-d coordinates of the measured points.
    Type: Application
    Filed: March 25, 2014
    Publication date: September 15, 2016
    Applicant: Tianjiin University
    Inventors: Jigui ZHU, Jiarui LIN, Yongjie REN, Linghui YANG, Yu REN