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公开(公告)号：US11766004B2
公开(公告)日：2023-09-26
申请号：US17525055
申请日：2021-11-12
Applicant: CHINA INSTITUTE OF WATER RESOURCES AND HYDROPOWER RESEARCH , BEIJING AITEFU WATER SAVING TECHNOLOGY CO., LTD.
Inventor： Yan Mo , Jiandong Wang , Yanqun Zhang , Qiaoling Li , Shihong Gong , Di Xu , Xiaoyan Gao
IPC: A01G25/02
CPC classification number: A01G25/023
Abstract: A drip irrigation apparatus and system. The drip irrigation apparatus includes a flow channel body and an elastic body. The elastic body is mounted on the outer circumference of the flow channel body and fitted in a spontaneous state to the outer circumference of the flow channel body. The flow channel body includes an energy dissipation body. The first drainage channel is formed in the energy dissipation body, the first drainage channel is connected to both ends of the energy dissipation body. The first drainage channel is connected at both ends of the first drainage channel to the inner wall of the elastic body forming a radial drainage channel.
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公开(公告)号：US10579756B2
公开(公告)日：2020-03-03
申请号：US15544160
申请日：2016-06-30
Inventor： Di Xu , Shaohui Zhang , Meijian Bai , Yinong Li , Fuxiang Li
IPC: G06F17/50
Abstract: A simulation method of a surface water movement process in surface irrigation, comprising: acquiring surface relative elevation data, border surface roughness coefficient data and surface water infiltration rate data of a target border check; substituting surface relative elevation data, border surface roughness coefficient data and surface water infiltration rate data into improved full hydrodynamic equations, and performing numerical solution on improved full hydrodynamic equations to obtain a simulated surface water depth value and simulated values of vertical integral average velocities of an irrigation water flow in x-coordinate and y-coordinate directions of a certain measurement site in the target border check at a certain time; and obtaining simulated values of unit width discharge of the irrigation water flow in x-coordinate and y-coordinate directions, respectively according to simulated surface water depth value and simulated values of the vertical integral average velocities of the irrigation water flow in x-coordinate and y-coordinate directions.
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公开(公告)号：US20190108297A1
公开(公告)日：2019-04-11
申请号：US15544160
申请日：2016-06-30
Inventor： Di Xu , Shaohui Zhang , Meijian Bai , Yinong Li , Fuxiang Li
CPC classification number: G06F17/5018 , G06F17/50 , G06F17/5009 , G06F2217/16
Abstract: A simulation method of a surface water movement process in surface irrigation, comprising: acquiring surface relative elevation data, border surface roughness coefficient data and surface water infiltration rate data of a target border check; substituting surface relative elevation data, border surface roughness coefficient data and surface water infiltration rate data into improved full hydrodynamic equations, and performing numerical solution on improved full hydrodynamic equations to obtain a simulated surface water depth value and simulated values of vertical integral average velocities of an irrigation water flow in x-coordinate and y-coordinate directions of a certain measurement site in the target border check at a certain time; and obtaining simulated values of unit width discharge of the irrigation water flow in x-coordinate direction and y-coordinate directions, respectively according to simulated surface water depth value and simulated values of the vertical integral average velocities of the irrigation water flow in x-coordinate and y-coordinate directions.
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Patent Agency Ranking
公开(公告)号：US10132625B2
公开(公告)日：2018-11-20
申请号：US15312251
申请日：2015-11-27
Inventor： Shaohui Zhang , Di Xu , Yinong Li , Meijian Bai , Fuxiang Li
Abstract: The present invention belongs to the technical field of irrigation and water conservancy, and discloses a method for acquiring anisotropic basin surface roughness and use thereof. The method includes: preselecting two experimental strip fields respectively parallel to length direction and width direction of a target basin, to respectively acquire first surface water flow advancing process data of the two experimental strip fields, where the target basin may be regarded as a square-shaped field; acquiring two pieces of isotropic basin surface roughness respectively by using one-dimensional complete hydrodynamic model for basin irrigation according to the surface water flow advancing process data; and substituting the isotropic basin surface roughness into an elliptic equation that anisotropic basin surface roughness satisfies, to solve anisotropic basin surface roughness of the target basin, the anisotropic basin surface roughness including basin surface roughness components parallel to and perpendicular to shallow furrows on basin surface and crop planting direction in the target basin. The anisotropic basin surface roughness can truly reflect the resistance of the basin surface against the water flow, thereby improving simulation precision of surface irrigation hydrodynamics, and acquiring more accurate irrigation performance indexes.
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公开(公告)号：US20180249648A1
公开(公告)日：2018-09-06
申请号：US15544130
申请日：2016-03-22
Inventor： Di Xu , Caili Wu , Meijian Bai , Yinong Li , Fuxiang Li , Yuan Shi
CPC classification number: A01G25/16 , A01G25/167 , G05B13/042
Abstract: The present invention discloses a method for controlling surface irrigation based on surface water depth information, which belongs to the technical field of irrigation. The method comprises: measuring in real time surface water depths and water stream advancing durations of each of measuring points in a first half of a target farmland block, and substituting them into a surface irrigation model, to obtain initial values of soil infiltration parameters, substituting the initial values of the soil infiltration parameters into the surface irrigation model, to obtain analogue values of surface water depths of each of measuring points having water before a preset measuring point when the water stream in the first half of the target farmland block has advanced to the preset measuring point, by using the objective function that the average value of the errors of the measured values that are corresponding to it is minimum, reversely solving and optimizing the soil infiltration parameters, and substituting the optimized soil infiltration parameters again into the surface irrigation model, to predict a complete process of the surface irrigation, and adjusting an irrigation duration according to the prediction result, thereby realizing accurately controlling on the surface irrigation process. The method that is provided by the present invention can accurately control surface irrigation, to effectively improve the irrigation quality and promote the level of field management.
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公开(公告)号：US11300430B2
公开(公告)日：2022-04-12
申请号：US16304447
申请日：2016-06-30
Inventor： Shaohui Zhang , Di Xu , Wei Dai , Meijian Bai , Qunchang Liu , Fuxiang Li
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 surface water infiltration rate, and repeating the described process until the relative error between the two is less than or equal to the preset threshold value, so as to acquire the two viable results and acquire the canal flow rate at any measurement point of the target canal.
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公开(公告)号：US10455781B2
公开(公告)日：2019-10-29
申请号：US15544130
申请日：2016-03-22
Inventor： Di Xu , Caili Wu , Meijian Bai , Yinong Li , Fuxiang Li , Yuan Shi
Abstract: A method for controlling surface irrigation comprising: measuring in real time surface water depths and water stream advancing durations of each of measuring points in a first half of a target farmland block, and substituting them into a surface irrigation model, to obtain initial values of soil infiltration parameters, substituting the initial values into the surface irrigation model, to obtain analog values of surface water depths of each of measuring points having water before a preset measuring point when the water stream in the first half of the target farmland block has advanced to the preset measuring point, by using the objective function that average value of the errors of the measured values that are corresponding to it is minimum, reversely solving and optimizing the soil infiltration parameters, and substituting optimized soil infiltration parameters again into the surface irrigation model, and adjusting an irrigation duration according to the prediction result.
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公开(公告)号：US20180038688A1
公开(公告)日：2018-02-08
申请号：US15312251
申请日：2015-11-27
Inventor： Shaohui Zhang , Di Xu , Yinong Li , Meijian Bai , Fuxiang Li
IPC: G01B21/30
CPC classification number: G01B21/30 , A01G25/167 , G01N2033/245
Abstract: The present invention belongs to the technical field of irrigation and water conservancy, and discloses a method for acquiring anisotropic basin surface roughness and use thereof. The method includes: preselecting two experimental strip fields respectively parallel to length direction and width direction of a target basin, to respectively acquire first surface water flow advancing process data of the two experimental strip fields, where the target basin may be regarded as a square-shaped field; acquiring two pieces of isotropic basin surface roughness respectively by using one-dimensional complete hydrodynamic model for basin irrigation according to the surface water flow advancing process data; and substituting the isotropic basin surface roughness into an elliptic equation that anisotropic basin surface roughness satisfies, to solve anisotropic basin surface roughness of the target basin, the anisotropic basin surface roughness including basin surface roughness components parallel to and perpendicular to shallow furrows on basin surface and crop planting direction in the target basin. The anisotropic basin surface roughness can truly reflect the resistance of the basin surface against the water flow, thereby improving simulation precision of surface irrigation hydrodynamics, and acquiring more accurate irrigation performance indexes.
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