Method for calibrating surface temperature of metal flat plate

A metal plate, surface temperature technology, applied in the field of heat treatment of cold-rolled metal plate and product development, can solve the problems of inaccuracy, interference, etc., and achieve the effect of accurate temperature measurement, simple method and convenient realization

Inactive Publication Date: 2012-08-01
WISDRI WUHAN WIS IND FURNACE
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Problems solved by technology

[0004] However, the non-contact measurement method is disturbed by many factors. For example, the accuracy of the temperature measurement of the infrared thermal imager is affected by the emissivity of the surface of the

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  • Method for calibrating surface temperature of metal flat plate
  • Method for calibrating surface temperature of metal flat plate
  • Method for calibrating surface temperature of metal flat plate

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Embodiment Construction

[0046] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0047] A method for calibrating the surface temperature of a flat metal plate. The method uses a constant temperature bath medium as a heating source to heat one side of the flat metal plate to be tested, and installs a plurality of direct-contact heat-sensitive elements on the surface to measure the temperature of the flat metal plate to be tested; On the other side of the metal plate, use a non-contact temperature measuring instrument to measure the surface temperature of the metal plate to be tested;

[0048] According to the temperature measurement principle of the infrared temperature measuring instrument, Stephen-Boltzmann's law, the surface emissivity of the metal plate to be tested is calculated; the Stephen-Boltzmann's law is that the relationship between the radiation energy W of a black body and its temperature T is W= ε*σ*T 4 , where Bol...

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Abstract

The invention relates to a method for calibrating surface temperature of a metal flat plate, which comprises the following steps: heating one surface of a measured metal flat plate by taking a constant temperature bath medium as a heating source, and installing a plurality of direct contact type thermal sensors on the surface to measure the temperature of the measured metal flat plate; measuring the surface temperature of the measured metal flat plate on the other surface of the to-be-measured metal flat plate with a non-contact type temperature-measuring apparatus; and calculating the surface emissivity of the measured metal flat plate according to the temperature measurement principle Stefan-Boltzmann law of an infrared temperature-measuring apparatus, wherein the Stefan-Boltzmann law is that the relationship between the radiant energy of a black body and the temperature T of the black body is as follows: W is equal to epsilon*alpha*T4, where Boltzmann constant alpha is equal to 5.67*10<-8>W/m<2>.K<4>, T is the absolute temperature of a tested object and has a unit of K, and epsilon is the surface emissivity of the tested object. The method provided by the invention is simple and easy to implement, and can accurately measure the surface emissivity of the measured metal flat plate so as to ensure accurate surface temperature measurement of the measured metal flat plate.

Description

technical field [0001] The invention relates to the technical field of heat treatment of cold-rolled metal strips, in particular to a method for calibrating the surface temperature of smooth and non-oxidized metal plates in the heat treatment process of metal strips. The field of experimental research and product development with surface metal plates. Background technique [0002] With the increasing demand for high-quality products in various industries, the process requirements for heat treatment of metal plates are becoming more and more stringent. In the heat treatment process, in order to obtain a flat metal product with certain mechanical properties and good surface properties, it is necessary to precisely heat or cool the flat metal to a specific process temperature point (or within a temperature range) to ensure the mechanical properties or surface quality of the flat metal within the range required by the product. Therefore, we need to ensure the accuracy of the s...

Claims

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Application Information

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IPC IPC(8): G01J5/00
Inventor 廖慧伍成波
Owner WISDRI WUHAN WIS IND FURNACE
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