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Interference elimination method for water level measurement based on planar radar water level gauge

A technology of radar water level gauge and water level measurement, which is applied in the direction of measuring device, radio wave measurement system, liquid/fluid solid measurement, etc. It can solve the problems of large error, affecting measurement results, and inability to distinguish objects of different materials, etc., and achieves small error , accurate measurement, and the effect of eliminating interference

Active Publication Date: 2020-04-14
NANJING AUTOMATION INST OF WATER CONSERVANCY & HYDROLOGY MINIST OF WATER RESOURCES
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Problems solved by technology

[0003] At present, the planar radar wave water level gauge and the pulse radar water level gauge on the market are both a single transmitting antenna and a single receiving antenna, which can only measure the plane within the beam width range of the radar antenna, and cannot distinguish objects of different materials, and other objects enter the radar irradiation In the plane, it will affect the measurement results, and when the installation height is high, the range of radar irradiation on the water surface will be large, and interfering objects are more likely to appear within the range
In addition, when the radar water level gauge is installed on the shore, the water level on the shore drops and the river bed is exposed during the dry season. In this case, the land and the water surface cannot be distinguished, so measurement errors are more likely to occur
Therefore, the error of the measurement results obtained by the existing measurement method based on the planar radar water level gauge is still large, which cannot meet the increasing accuracy requirements

Method used

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  • Interference elimination method for water level measurement based on planar radar water level gauge
  • Interference elimination method for water level measurement based on planar radar water level gauge
  • Interference elimination method for water level measurement based on planar radar water level gauge

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Embodiment Construction

[0062]The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0063] In the embodiment of the present invention, the radar water level gauge is installed as figure 1 As shown, the objects within the scanning range are scanned from the X direction and the Y direction. figure 1 , there are objects A and B within the range of radar irradiation, and the radar antenna scans from the X direction and the Y direction respectively to determine the positions of A and B in the X direction (X A , Z) and (X B , Z), the positions of A and B in the Y direction (Y A , Z) and (Y B , Z), and the center position (X o , Z) and (Y o ,Z).

[0064] figure 2 It is a schematic diagram of the antenna, which reflects the directions of X and Z ...

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Abstract

The invention discloses a interference elimination method for water level measurement based on a planar radar water level gauge. A multi-input multi-output radar antenna is used. Objects at differentpositions in a radar irradiation range can be distinguished, so that interferents such as a river levee can be eliminated; objects made of different materials can be distinguished, so that the water surface can be distinguished from other objects; when the interferent enters the center of the measurement range, interference of objects such as floaters and ships can be eliminated by analyzing whether the interferent is the water surface or not; and measurement errors are reduced, and measurement is more accurate.

Description

technical field [0001] The invention belongs to the technical field of water level measurement, and relates to a method for eliminating interference in water level measurement based on a planar radar water level gauge. Background technique [0002] Radar water level gauge is a hydrological instrument that uses radar technology to measure water level. It is not affected by temperature gradient and water flow velocity during measurement. It has the characteristics of complete non-contact. There are strong application requirements in environments where it is not convenient to build water level wells and require high-precision data. [0003] At present, the planar radar wave water level gauge and the pulse radar water level gauge on the market are both a single transmitting antenna and a single receiving antenna, which can only measure the plane within the beam width range of the radar antenna, and cannot distinguish objects of different materials, and other objects enter the ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/284G01S13/32G01S7/35G01S7/41
CPCG01F23/284G01S7/352G01S7/354G01S7/411G01S7/418G01S13/32G01S7/356
Inventor 汪义东陈伯云朱剑峰杜红娟唐炜李亚涛耿欣欣陈志峰张永兵季国安叶文彬贾德硕
Owner NANJING AUTOMATION INST OF WATER CONSERVANCY & HYDROLOGY MINIST OF WATER RESOURCES
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