A liquid level control system and liquid level measurement method based on oblique photography

Abstract

The invention relates to a liquid level control system and liquid level measuring method based on oblique photography, wherein the liquid level control system comprises a nozzle bag; a nozzle bag cover is set on an upper portion of the nozzle bag; the nozzle bag cover is provided with a glass observation window; the glass observation window is provided with a scale; the liquid level height inside the nozzle bag and the inner wall of the nozzle bag are formed a liquid lever cross line; the scale is parallel to the liquid level cross line; a CCD camera is set above the nozzle bag in an inclined way; the liquid level cross line inside the nozzle bag is captured through an optical shaft of the CCD camera by penetrating through the glass observation window; the liquid level cross line, the scale and the lens focus of the CCD camera are in the same surface; a data transmission line is connected between the CCD camera and a PC machine; and the glass observation window is an oval shape. According to the invention, the liquid level control system and liquid level measuring method provided herein has the advantages of high measuring accuracy, rapid measuring speed, simple structure, easy removal and installation and low cost; the surface of an amorphous thin belt is bright; the figure of the fish scale is not obvious; and the quality of the amorphous thin belt is improved.

Description

technical field [0001] The invention relates to a liquid level control system and a liquid level measurement method based on oblique photography, and belongs to the technical field of amorphous thin strip processing. Background technique [0002] Amorphous ribbons were prepared by rapid solidification (cooling speed 10 6 °C / s) planar flow casting technology, the high-temperature molten steel is sprayed onto the surface of the high-speed rotating cooling roll through the slit. On the diameter cooling roll, all the factors restricting the performance of the thin strip will be more concentrated, complex and difficult to control. At present, most of the amorphous strip throwing equipment with a high degree of automation control is manufactured abroad, and amorphous and nanocrystalline thin strips occupy nearly 70% of the domestic market. At the end of the "Twelfth Five-Year Plan", a number of 10,000-ton amorphous strip production lines were put into operation, but the automati...

AI Technical Summary

Problems solved by technology

The high temperature, strong heat radiation and harsh environment of the metal melt make contact measurement such as detection instruments impossible to use at all. However, indirect contact measurement through floating rods or floating objects on the liquid surface is affected by liquid level fluctuations, composition, density and surface tension. The immersion depth and indication of the float rod will change, these hidden factors will affect the control of the liquid level, and the buoy will pollute the purity of the alloy melt; non-contact infrared, capacitance, ultrasonic and laser sensors are affected by environmental changes , anti-interference ability, low resolution, large measurement and system errors limit its application, while radioactive sources and X-ray radiation techniques have high measurement accuracy, but they are harmful to personal safety and expensive equipment

With the advancement of optoelectronic technology and photography technology, CCD photogrammetry technology is less affected by the environment and melt, and the equipment is simple and reliable. The high-resolution array CCD photography detection method can better realize the non-contact measurement and measurement of high-temperature melt liquid level. Control. In addition, the existing CCD industrial camera takes pictures of the liquid level in the nozzle package. Since the line of sight of the liquid level is blocked by the spray package, the orthographic CCD camera cannot monitor the height of the liquid level.

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