Patents by Inventor Enyao SHANG

Enyao SHANG 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 calibrating an error of installation of an interferometer in a multi-axis laser displacement measurement system
    Patent number: 11022423
    Abstract: Provided is a method for calibrating an error of installation of an interferometer in a multi-axis laser displacement measurement system, including: adding one or more redundant interferometers in a laser interferometer displacement measurement system; then establishing displacement calculating equations containing installation error of the laser interferometer and obtaining redundant measurement information by continuously measuring displacement information of multiple points, wherein the number of the combined displacement calculating equations is equal to the number of unknown quantities; and further solving the equation set to obtain the installation error of the interferometer. With a redundant arrangement of the laser interferometer, self-calibration of the installation error thereof can be achieved.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: June 1, 2021
    Assignee: TSINGHUA UNIVERSITY
    Inventors: Yu Zhu, Jinchun Hu, Shengwu Du, Enyao Shang, Ming Zhang, Wensheng Yin, Kaiming Yang, Rong Cheng
  • A METHOD FOR CALIBRATING AN ERROR OF INSTALLATION OF AN INTERFEROMETER IN A MULTI-AXIS LASER DISPLACEMENT MEASUREMENT SYSTEM
    Publication number: 20210033383
    Abstract: Provided is a method for calibrating an error of installation of an interferometer in a multi-axis laser displacement measurement system, including: adding one or more redundant interferometers in a laser interferometer displacement measurement system; then establishing displacement calculating equations containing installation error of the laser interferometer and obtaining redundant measurement information by continuously measuring displacement information of multiple points, wherein the number of the combined displacement calculating equations is equal to the number of unknown quantities; and further solving the equation set to obtain the installation error of the interferometer. With a redundant arrangement of the laser interferometer, self-calibration of the installation error thereof can be achieved.
    Type: Application
    Filed: October 25, 2018
    Publication date: February 4, 2021
    Inventors: Yu ZHU, Jinchun HU, Shengwu DU, Enyao SHANG, Ming ZHANG, Wensheng YIN, Kaiming YANG, Rong CHENG