Method for monitoring water level of reservoir by utilizing GNSS three-frequency phase combination data
A technology of phase combination and reservoir water level, which is used in the measurement of the depth of open-air water sources, measurement devices, mapping and navigation, etc. It can solve the problems of high monitoring cost, inability to achieve continuous observation, and limited observation, and achieve a large amount of data and high Availability and economy, high precision effect
Inactive Publication Date: 2020-07-10
CHINA UNIV OF MINING & TECH
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The artificial method has certain limitations: continuous observation cannot be achieved, and the spatial and temporal resolution of observation is not high, especially in the rainstorm and flood season, the observation is limited and there are potential safety hazards
Ultrasonic and other means usually need to establish a complete set of monitoring system, and the monitoring cost is relatively high
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0038] The signal received by the traditional earth receiver antenna is the interference signal generated by the superposition of the satellite direct signal and the signal reflected by the water surface or the ground. figure 1 is the geometric figure of signal interference, so the water surface is regarded as a mirror reflection, firstly, the three-frequency phase observation data and the satellite elevation angle are extracted from the satellite observation values; the reflection signal comes from the mirror point SP, and the superposition signal of the reflection signal and the direct signal ( That is, the path delay of the interference signal) relative to the direct signal is related to the vertical height h between the water surface and the phase center of the receiver antenna.
[0039] figure 2is the phase relationship of the interference signal,...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for monitoring a water level of a reservoir by utilizing GNSS three-frequency phase combination data. The method is suitable for water level monitoring, and comprisesthe steps of: acquiring an interference signal by utilizing three-frequency phase combination through using GNSS deformation monitoring receiver data of an erected reservoir dam high slope near-watersurface; extracting three carrier signals, and acquiring interference time sequence signals in a combination mode of eliminating geometric distance and ionospheric delay; acquiring a main frequency ofthe interference signal through carrying out spectral analysis by utilizing wavelet analysis; enabling the time sequence signals to be in one-to-one correspondence with satellite elevation angles toform time sequence signals taking the satellite elevation angles as variables, and carrying out the spectral analysis on the unequal interval signals to acquire the main frequency; establishing a model of the main frequency and the known reservoir water level; and acquiring the real-time reservoir water level through adopting the model. The method is simple in steps, can realize real-time detection, is high in detection precision, and can realize automatic detection without manual intervention.
Description
technical field [0001] The invention relates to a method for monitoring the water level of a reservoir, and is especially suitable for monitoring the water level of the reservoir by using GNSS data of a reservoir dam deformation monitoring system used in flood control and drought relief. Background technique [0002] Water is a precious natural resource that human beings depend on for survival, and it is also a source of disasters. Rational storage, utilization, and monitoring of changes in water resources are important guarantees for economic and ecological sustainable development. As an important water conservancy infrastructure, reservoirs play a vital role in water transportation, hydropower generation, flood control and drought relief, and ecological environment. The safety of the reservoir directly affects the safety of people's lives and property downstream. At present, the traditional reservoir water level monitoring generally adopts artificial water gauge measureme...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/42G01F23/284G01C13/00
CPCG01C13/008G01F23/284G01S19/42Y02A90/30
Inventor 班伟张小红张克非陈宇
Owner CHINA UNIV OF MINING & TECH