Patents by Inventor Qunchang LIU

Qunchang 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 irrigating farmland
    Patent number: 11300430
    Abstract: A method for acquiring a canal flow rate, comprising: measuring an actual measure value of an upstream water depth and an actual measure value of a downstream water depth of a target canal; presetting the upstream canal flow rate and surface water infiltration rate of the target canal, and respectively acquiring preset values of each; substituting the actual measured value of the upstream water depth, the preset value of the upstream canal flow rate, and the preset value of the surface water infiltration rate into Saint-Venant equations, so as to solve the equations and obtain a downstream water depth simulation value of the target canal; when the relative error between the downstream water depth simulation value and the actual measured value of the downstream water depth is less than or equal to the preset threshold value, acquiring a viable upstream canal flow rate and a viable surface water infiltration rate; otherwise, optimizing the preset value of the upstream canal flow rate and the preset value of the
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: April 12, 2022
    Assignee: China Institute of Water Resources and Hydropower Research
    Inventors: Shaohui Zhang, Di Xu, Wei Dai, Meijian Bai, Qunchang Liu, Fuxiang Li
  • METHOD AND DEVICE FOR ACQUIRING CANAL FLOW RATE, AND COMPUTER-READABLE STORAGE MEDIUM
    Publication number: 20190145803
    Abstract: A method for acquiring a canal flow rate, comprising: measuring an actual measure value of an upstream water depth and an actual measure value of a downstream water depth of a target canal; presetting the upstream canal flow rate and surface water infiltration rate of the target canal, and respectively acquiring preset values of each; substituting the actual measured value of the upstream water depth, the preset value of the upstream canal flow rate, and the preset value of the surface water infiltration rate into Saint-Venant equations, so as to solve the equations and obtain a downstream water depth simulation value of the target canal; when the relative error between the downstream water depth simulation value and the actual measured value of the downstream water depth is less than or equal to the preset threshold value, acquiring a viable upstream canal flow rate and a viable surface water infiltration rate; otherwise, optimizing the preset value of the upstream canal flow rate and the preset value of the
    Type: Application
    Filed: June 30, 2016
    Publication date: May 16, 2019
    Inventors: Shaohui ZHANG, Di XU, Wei DAI, Meijian BAI, Qunchang LIU, Fuxiang LI