Patents by Inventor Keqiang Liu

Keqiang 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).

  • METHOD FOR LOCATING AND FINDING ITEMS BASED ON ACOUSTIC SIGNAL
    Publication number: 20240012141
    Abstract: The present invention discloses an item locating and finding method, system and device based on acoustic signal, which relates to the field of item location, and aims at solving the problems in the prior art that a specific directional angle of the item cannot be detected and the technical solutions in the prior art are not suitable for common intelligent terminals and are greatly affected by the environmental noise; performing unilateral and bidirectional ranging based on the acoustic signal; and performing location by using acoustic ranging and PDR.
    Type: Application
    Filed: April 22, 2023
    Publication date: January 11, 2024
    Applicant: ZHEJIANG DEQING ZHILU NAVIGATION TECHNOLOGY CO., LTD
    Inventors: Jian DAI, Shoubin CHEN, Keqiang LIU
  • Method for locating and finding items based on acoustic signal
    Patent number: 11852721
    Abstract: The present invention discloses an item locating and finding method, system and device based on acoustic signal, which relates to the field of item location, and aims at solving the problems in the prior art that a specific directional angle of the item cannot be detected and the technical solutions in the prior art are not suitable for common intelligent terminals and are greatly affected by the environmental noise; performing unilateral and bidirectional ranging based on the acoustic signal; and performing location by using acoustic ranging and PDR.
    Type: Grant
    Filed: April 22, 2023
    Date of Patent: December 26, 2023
    Assignee: Shenzhen Zenith Technology Co., LTD
    Inventors: Jian Dai, Shoubin Chen, Keqiang Liu