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

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...

AI Technical Summary

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

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