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Radar current meter

A current meter and radar technology, which is applied in the field of water flow speed measuring devices, can solve the problems of not being able to test for a long time, large data errors, and low accuracy requirements

Inactive Publication Date: 2018-12-14
薛志勇
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Problems solved by technology

[0010] The measurement time must be obtained by manually pressing the [Start / Stop] timer, and then the water flow velocity can be obtained by simple calculation of the measuring instrument. This technology is cumbersome to use, cannot be tested for a long time, and needs to be operated by operators all the time. It has a wide range of applications limitations; and the error of the data obtained through this technology will be relatively large, so it can only be used to do some measurement work with low precision requirements

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specific Embodiment

[0034] The radar current meter adopts a non-contact measurement method, installed on the water surface, without mechanical moving components, and will not cause sensor failure due to debris in the water, and does not require operators to operate for a long time. It only needs to configure parameters at the initial stage of installation, which is convenient to use .

[0035] Compared with the traditional rotor speedometer which only obtains the speed through simple mechanical movement, we adopt the principle of Doppler effect to emit ISM 24.15GHz electromagnetic waves through the self-developed array antenna, and irradiate the surface of the river. The river scatters the electromagnetic waves back, The echo is obtained, and the Doppler frequency shift of the echo is calculated to obtain the surface velocity of the river.

[0036] Compared with the rough calculation of the simple measuring instrument, the upper computer software of the radar current meter adopts the RS-485 inter...

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Abstract

The invention discloses a radar current meter, comprising a radar current meter system control unit, a transmitting signal generating unit and a radio frequency conditioning unit, the system control unit firstly transmits a radar signal to a river by virtue of a transmitting antenna, then an echo signal is returned to a receiving antenna after the transmitted radar signal passes through the river,the transmitted signal and a received signal are processed by virtue of a mixer, a bandpass amplifier and an ADC and are subjected to Doppler processing, then spectrum correction, parameter estimation and correction are performed, and finally data is packaged and sent to a hydrologic monitoring station. The radar current meter can be mounted on a water surface by adopting a non-contact measurement mode, no mechanical movement component exists, and a fault of a sensor can not be caused by sundries in water.

Description

technical field [0001] The invention relates to a water flow velocity measuring device, in particular to a radar flow velocity meter. Background technique [0002] In order to gradually improve the river's flood disaster defense ability, ensure the safety of people's lives and property and the construction of the national economy, it is imperative to develop hydrological speed radar sensors. The shortcoming of inconvenient after-sales service, and most domestic products use contact propeller current meters, which are installed and fixed in water, and the flow velocity of water is obtained through mechanical moving components, which limits the scope of application and usage. According to the above situation, it is particularly important to research and develop the hydrological radar speed measuring instrument to fill the blank of domestic related products. [0003] Prior art one: [0004] The propeller current meter is directly installed in the water, directly contacts the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/58
CPCG01S13/58
Inventor 薛志勇
Owner 薛志勇
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