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A Detection Method of Liquid Iron Flow Velocity Based on Polarization Characteristics

A technology for flow velocity detection and polarization characteristics, which can be used in inspection devices, image enhancement, furnaces, etc., and can solve the problem of low flow velocity detection accuracy.

Active Publication Date: 2020-12-01
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The method for detecting the flow rate of molten iron based on polarization characteristics provided by the present invention solves the existing technical problem of low accuracy in detecting the flow rate of molten iron with high temperature, high speed and high light

Method used

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  • A Detection Method of Liquid Iron Flow Velocity Based on Polarization Characteristics
  • A Detection Method of Liquid Iron Flow Velocity Based on Polarization Characteristics
  • A Detection Method of Liquid Iron Flow Velocity Based on Polarization Characteristics

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Embodiment 1

[0069] refer to figure 1 The method for detecting the flow rate of molten iron based on polarization characteristics provided in Embodiment 1 of the present invention includes:

[0070] Step S101, collecting the video stream of the molten iron flow in the blast furnace taphole;

[0071] Step S102, decomposing the video stream into time-ordered frame image sequences, and performing preprocessing on the frame images in the frame image sequence, the preprocessing at least includes extracting extremely high photon features of the frame images;

[0072] Step S103, using the cross-correlation method to match the extremely high photon features in the preprocessed adjacent frame images, and calculating the horizontal pixel distance that the extremely high photon features move during the interval between adjacent frame images;

[0073] Step S104 , according to the horizontal pixel distance, calculate the actual horizontal distance that the extremely high photon feature moves in the wo...

Embodiment 2

[0080] refer to figure 2 , the method for detecting the flow rate of molten iron based on polarization characteristics provided by Embodiment 2 of the present invention includes:

[0081] Step S201, collecting a video stream of molten iron flow in a blast furnace taphole.

[0082] Specifically, this embodiment first determines the type selection of the high-speed camera, and installs the protective device, selects a suitable location at the blast furnace taphole site to install and fix the camera, refer to image 3 , collect high frame rate iron flow video, and perform camera calibration. In terms of camera selection, in order to meet the needs of speed measurement, the most important thing is the parameter selection of frame rate and resolution. A suitable frame rate can obtain the details of molten iron flow, and sufficient resolution can provide more detailed information on the image, and the camera It has the functions of light reduction filter and anti-dust and anti-no...

Embodiment 3

[0126] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings. The present invention is applied to a 2650m 3 On the blast furnace, the three tapholes on the blast furnace are in accordance with image 3 Install high-speed cameras and protective devices. According to the estimation of on-site workers, the flow rate of molten iron at the blast furnace taphole is 5-6m / s. In order to meet the needs of flow rate detection, the high-speed camera has a resolution of 1280*720 and a frame rate of 240. In order to make the high-speed camera run stably, the protection device uses air cooling to isolate a large amount of external heat radiation and take away the heat emitted by the high-speed camera. The specific implementation is based on Figure 6 The schematic diagram to complete the entire detection process of molten iron flow rate, the detection steps are as follows:

[0127] According to the installation ...

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Abstract

The invention discloses a molten iron flow velocity detection method based on polarization characteristics. A video stream of molten iron flow at a tapping hole of a blast furnace is collected; the video stream is decomposed into a frame image sequence taking time as a sequence; the frame image is preprocessed; extremely high photon characteristics are matched in the preprocessed adjacent frame images by using a cross-correlation method; the horizontal pixel distance of the extremely high photon characteristics moving in the interval time of the adjacent frames of images and the actual horizontal distance of the extremely high photon characteristics moving in a world coordinate system are calculated; and then the flow speed of molten iron flow is obtained. Thereby, the technical problem that the existing flow velocity detection precision of high-temperature, high-speed and high-gloss molten iron flow is not high is solved. A high-frame-rate video stream of molten iron flow at the outlet of the blast furnace is obtained in a non-invasive mode, extremely-high photon characteristics are accurately extracted in real time, and the horizontal pixel distance of the extremely-high photon characteristics moving in the interval time of adjacent frame images is solved, so that the flow velocity of the molten iron flow with high temperature, high speed and high gloss is detected in real time with high accuracy.

Description

technical field [0001] The invention mainly relates to the technical field of detecting the flow rate of molten iron, in particular to a method for detecting the flow rate of molten iron based on polarization characteristics. Background technique [0002] In the iron and steel industry, the stability of blast furnace production is crucial to the production process of the entire iron and steel enterprise. The process energy consumption and production cost of blast furnace ironmaking production account for more than 70% of the production of iron and steel enterprises. However, in the blast furnace, various multi-phase substances coexist and interact, and many physical and chemical phenomena occur simultaneously. One of the most complex metallurgical reactors, it is difficult to detect the internal pressure changes in the "black box" operation of the blast furnace with existing technical means. Detecting the flow rate of molten iron at the blast furnace taphole can represent t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/11G06T7/155G06T7/246G06T7/269G06T7/90C21B5/00C21B7/24
CPCC21B5/00C21B7/24G06T7/0004G06T2207/10016G06T2207/30136G06T7/11G06T7/155G06T7/246G06T7/269G06T7/90
Inventor 蒋朝辉何磊李端发谢永芳桂卫华徐勇沈宇航
Owner CENT SOUTH UNIV
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