Scale composition determination system, scale composition determination method, and program
AssigneeNippon Steel Corporation
InventorsHiroshi Tanei, Masato Sugiura, Shuichi Yamazaki, Yasumitsu Kondo
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Abstract
A scale composition determination device (10) determines that Fe2O3 has been generated in the outermost layer of a scale (SC) in the case where the absolute value of a difference between temperatures of a steel material SM measured by radiation thermometers (20a, 20b) is equal to or more than a predetermined temperature, and determines that Fe2O3 has not been generated in the outermost layer of the scale (SC) in the case where the absolute value of the difference between the temperatures of the steel material SM measured by the radiation thermometers (20a, 20b) is not equal to or more than the predetermined temperature.
Claims8
A scale composition determination system that determines a composition of a scale generated on a surface of a steel material, the scale composition determination system comprising:
- a computer processor including processing circuitry;
- and
- at least one of radiation thermometers, each of the at least one of radiation thermometers, including a respective light collecting lens that measures temperatures of the steel material at N pieces of wavelengths different from one another by radiation thermometry;
- wherein
- the computer processor determines whether or not hematite (Fe2O3) has been generated in an outermost layer of the scale based on a difference between two temperatures out of the temperatures of the steel material measured by the at least one of radiation thermometers, wherein
- N pieces of the wavelengths are determined so as to prevent an intersection point where hematite curves at N pieces of the wavelengths all intersect from being present within a range of an assumed thickness of hematite (Fe2O3),
- the hematite curves are curves indicating the relationship between a thickness of hematite and a temperature of hematite, and
- N is an integer of three or more.
A scale composition determination method that determines a composition of a scale generated on a surface of a steel material, the scale composition determination method comprising:
- a measurement step of measuring temperatures of the steel material at N pieces of wavelengths different from one another by radiation thermometry;
- and
- a determination step of determining whether or not hematite (Fe2O3) has been generated in an outermost layer of the scale based on a difference between two temperatures out of the temperatures of the steel material measured by the measurement step, wherein
- N pieces of the wavelengths are determined so as to prevent an intersection point where hematite curves at N pieces of the wavelengths all intersect from being present within a range of an assumed thickness of hematite (Fe2O3),
- the hematite curves are curves indicating the relationship between a thickness of hematite and a temperature of hematite, and
- N is an integer of three or more.
A non-transitory computer-readable storage medium recording a program, executable by a computer processor including processing circuitry, for causing a computer to execute determination of a composition of a scale generated on a surface of a steel material, the program causing a computer to execute:
- an acquisition step of acquiring temperatures of the steel material at N pieces of wavelengths different from one another, the temperatures measured by radiation thermometry;
- and
- a determination step of determining whether or not hematite (Fe2O3) has been generated in an outermost layer of the scale based on a difference between two temperatures out of the temperatures of the steel material acquired by the acquisition step, wherein
- N pieces of the wavelengths are determined so as to prevent an intersection point where hematite curves at N pieces of the wavelengths all intersect from being present within a range of an assumed thickness of hematite (Fe2O3),
- the hematite curves are curves indicating the relationship between a thickness of hematite and a temperature of hematite, and
- N is an integer of three or more.
Dependencies are inferred from the claim text.