Water-mist-penetrating temperature measurement system and method for steel hot rolling

Patent metadata

Field	Value
Publication number	US-12415216-B1
Application number	US-202519074054-A
Country	US
Kind code	B1
Filing date	Mar 7, 2025
Priority date	Jan 21, 2025
Publication date	Sep 16, 2025
Grant date	Sep 16, 2025

Abstract

A water-mist-penetrating temperature measurement system and method for steel hot rolling, the system including a water-mist-penetrating temperature measurement device, and the water-mist-penetrating temperature measurement device including a visible light guiding-tracking assembly, an optical focusing assembly, a dual-wavelength beam splitting assembly, a multi-source information processing assembly, and a display assembly; and the method including the steps of obtaining a dual-wavelength radiation signal and a visible light image signal of the object to be measured, processing the obtained dual-wavelength radiation signal and the visible light image signal, and detecting and processing an abnormally fluctuated temperature data.

First claim

The invention claimed is:

1. A water-mist-penetrating temperature measurement system for steel hot rolling, comprising a water-mist-penetrating temperature measurement device, and a high-pressure water jet cutting device; wherein the water-mist-penetrating temperature measurement device comprises a visible light guiding-tracking assembly, an optical focusing assembly; a dual-wavelength beam splitting assembly, a multi-source information processing assembly, and a display assembly; the visible light guiding-tracking assembly is configured to determine a measurement view field of an object to be measured by guiding a visible light, to achieve real-time tracking and monitoring of the object to be measured, and to receive a visible light image signal from the object to be measured; the optical focusing assembly is configured to focus an infrared radiation beam emitted from the object to be measured and guide it to the dual-wavelength beam splitting assembly; the dual-wavelength beam splitting assembly is configured to split the infrared radiation beam into two infrared radiation signals of different wavelengths and convert each infrared radiation signal into a corresponding electrical signal; the multi-source information processing assembly is configured to fuse electrical signals with the visible light image signal received by the visible light guiding-tracking assembly through multi-source information integration, then send a processed image information and temperature information to the display assembly; and the high-pressure water jet cutting device is configured to cut and thin cooling water sprayed from a nozzle directly above a rolled steel on a conveying roller bed of a steel hot-rolling production line, and the rolled steel serves as the object to be measured.

2. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 1 , wherein the optical focusing assembly is a dual-curved-mirror assembly.

3. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 2 , wherein the optical focusing assembly is a Cassegrain curved mirror assembly.

4. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 3 , wherein the optical focusing assembly comprises a first curved mirror and a second curved mirror spaced apart along a central optical axis, the second curved mirror comprises a concave reflective surface and a central aperture formed on the concave reflective surface, the first curved mirror comprises a convex reflective surface arranged opposite to the concave reflective surface, and the optical focusing assembly is configured to direct the infrared radiation beam emitted from the object to be measured through an annular area surrounding the first curved mirror onto the second curved mirror, then guide the infrared radiation beam sequentially via the concave reflective surface, the convex reflective surface, and the central aperture to the dual-wavelength beam splitting assembly.

5. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 4 , wherein the dual-wavelength beam splitting assembly comprises a semi-transparent and semi-reflective beam-splitting mirror, a first radiation detector, a second radiation detector, a first monochromatic filter, and a second monochromatic filter, and the dual-wavelength beam splitting assembly is configured to split the infrared radiation beam into a transmitted beam and a reflected beam through the semi-transparent and semi-reflective beam-splitting mirror, direct the reflected beam through the first monochromatic filter to the first radiation detector for conversion into a first electrical signal, and direct the transmitted beam through the second monochromatic filter to the second radiation detector for conversion into a second electrical signal.

6. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 5 , wherein the first monochromatic filter and the second monochromatic filter have different center wavelengths.

7. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 5 , wherein curvatures of the first curved mirror and the second curved mirror are configured to focus the infrared radiation beam emitted from the object to be measured, such that the infrared radiation beam can be focused onto the first radiation detector and the second radiation detector, respectively.

8. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 5 , wherein the dual-wavelength beam splitting assembly is integrated in a cubic structure; and the semi-transparent and semi-reflective beam-splitting mirror is mounted on a diagonal plane of a cube, and the first monochromatic filter and the first radiation detector corresponding to the first monochromatic filter, and the second monochromatic filter and the second radiation detector corresponding to the second monochromatic filter are located on two adjacent surfaces of the cube, respectively.

9. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 5 , wherein the multi-source information processing assembly comprises a processor, the first radiation detector is electrically connected to the processor, and the second radiation detector is electrically connected to the processor.

10. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 9 , wherein the display assembly comprises a display, and the processor is electrically connected to the display.

11. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 9 , wherein the visible light guiding-tracking assembly comprises a camera and a visible light source, the camera is configured to achieve real-time tracking and monitoring of the object to be measured, and to receive the visible light image signal from the object to be measured; and the visible light source is configured to determine the measurement view field of the object to be measured by guiding the visible light.

12. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 11 , wherein the camera is electrically connected to the processor.

13. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 1 , wherein the water-mist-penetrating temperature measurement device further comprises a housing, the visible light guiding-tracking assembly, the optical focusing assembly, the dual-wavelength beam splitting assembly, the multi-source information processing assembly, and the display assembly are arranged within the housing, and the housing is provided with an optical aperture configured to permit a transmission of the infrared radiation beam emitted by the object to be measured.

14. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 13 , wherein a water-cooled jacket is provided outside the housing.

15. The water-mist-penetrating temperature measurement system for steel hot rolling according to claim 1 , further comprising a device deployment support configured to mount and position the water-mist-penetrating temperature measurement device and the high-pressure water jet cutting device.

16. A temperature measurement method using a water-mist-penetrating temperature measurement system for steel hot rolling, the system comprising:
a water-mist-penetrating temperature measurement device, wherein the wate

Assignees

• Univ Shanghai Jiaotong

Inventors

• Guan Xinping
• Wen Xiaojing
• Jin Tiankai
• Zhang Yanzhou
• Wu Kaijie
• Chen Cailian

Classifications

• G01J5/602

  using selective, monochromatic or bandpass filtering · CPC title

• G01J2005/0077

  Imaging · CPC title

• G01J5/004

  by molten metals · CPC title

• G01K11/14

  of inorganic materials · CPC title

• B21B38/006 Primary

  for measuring temperature · CPC title