Method and device of flow velocity measurement of space medium based on chirp signals

A linear frequency modulation signal, flow velocity measurement technology, applied in the direction of measuring device, fluid velocity measurement, velocity/acceleration/shock measurement, etc., can solve problems such as difficult to adapt to underwater environment

Inactive Publication Date: 2013-06-05
SOUTH CHINA UNIV OF TECH
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  • Abstract
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, simplify the complexity of the current medium flow velocity measurement method,

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  • Method and device of flow velocity measurement of space medium based on chirp signals
  • Method and device of flow velocity measurement of space medium based on chirp signals
  • Method and device of flow velocity measurement of space medium based on chirp signals

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Embodiment Construction

[0058] The specific implementation of the device of the present invention (including device structure and working steps) will be further described below in conjunction with the accompanying drawings. The following is only a further example, and the same parts as those in the summary of the invention will not be repeated.

[0059] figure 1 Shown is a schematic diagram of a medium with a one-dimensional direction flowing between points A and B at a velocity v, figure 2 Then, the medium with three-dimensional direction flows between A and B. As shown in the figure, its three-dimensional velocity is decomposed into component velocities in the three directions of x, y, and z according to the Cartesian coordinate system.

[0060] image 3 It is a module block diagram of a measurement device, which mainly includes five modules: an operation module 101, a processing module 102, a transceiver module 103 (including a transmitting module and a receiving module), an output display modul...

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Abstract

The invention discloses a method and a device of flow velocity measurement of a space medium based on chirp signals. The method determines the transmission time of signals according to simulated chirp signals sent and received by a transmitter module and a receiving module, and then determines the flow velocity of the medium according to the physical relation of the velocity and the time. The device comprises an operation module, a processing module, an output display module, the transmitter module and the receiving module. The processing module is connected with the operation module, the output display module the transmitter module and the receiving module respectively, the processing module carries out data processing according on the instructions input by the operation module, the wave forms and the data of measurement signals are transmitted through the transmitter module and received by the receiving module, the data of the received signals are obtained through an analog-digital converter, the measurement results of the flow velocity of the medium are obtained by analyzing and processing the data of the received signals, and results are transmitted to the output display module. The method and the device of the flow velocity measurement of the space medium based on the chirp signals are high in measurement precision, strong in anti-jamming capability, and low in calculation quantity, and the device is simple in structure, convenient to use, and low in cost.

Description

technical field [0001] The invention relates to linear frequency modulation measurement technology, in particular to a method and device for measuring three-dimensional medium flow velocity in a designated area by using linear frequency modulation (LFM) technology to construct measurement signals, and transmitting and receiving linear frequency modulation (LFM) signals. Background technique [0002] With the development of science and technology and the increasing demand of the industry, the measurement of medium flow rate has become a hot spot that people pay more and more attention to. With the development of modern fluid mechanics and aerodynamics, especially the need for in-depth research on various complex flow phenomena (including the formation of turbulent flow, vortex, shock wave interference, etc.), it is necessary to accurately measure and display these complex flow phenomena. very important and urgent. These complex flow phenomena are generally three-dimensional,...

Claims

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Application Information

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IPC IPC(8): G01P5/22
Inventor 宁更新李鉴通韦岗季飞
Owner SOUTH CHINA UNIV OF TECH
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