JP2012189394A - Quality control temperature setting apparatus for steel plate, and quality control temperature setting method using the apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand a control range in a width direction of a steel plate, while succeeding quality control on the basis of highly reliable temperature information based on a specific point, in a hot-rolling equipment line.SOLUTION: A quality control temperature setting apparatus for a steel plate includes: a spot-type radiation thermometer 5 for reference, that has a first measuring element and that measures temperature information, which is referred to as a basis of temperature control, at a specific point on a transported steel plate; a scan-type radiation thermometer 7 that has a second measuring element which is different from the first measuring element, and that measures control temperature information across a full width of the transported steel plate; and a radiation thermometer 6 for correction, that has a measuring element which is the same as the second measuring element, and that measures the temperature information at the specific point. In the quality control temperature setting apparatus for a steel plate, and in the quality control temperature setting method using the same, a difference between measured temperatures is obtained from the temperature information of the spot-type radiation thermometer 5 for reference and the radiation thermometer 6 for correction, and the control temperature information of the scan-type radiation thermometer 7 is corrected based on the difference between the measured temperatures.

Description

  The present invention relates to a quality control temperature setting device that sets a quality control temperature by measuring the temperature in the width direction of a steel sheet conveyed in a hot rolling facility with a plurality of radiation thermometers installed on the line, and a quality using the same. The present invention relates to a management temperature setting method.

A radiation thermometer receives radiation from a measurement object with a detector that uses a measurement element such as silicon, and displays the measurement result based on the relationship between the detector output and the temperature of the object based on the received light energy. Is.
In this radiation thermometer, temperature measurement in the width direction is possible by arranging a plurality of measuring elements linearly in an array, or providing a rotating mirror on the detector side to expand the measuring range on a straight line. There is a scanning radiation thermometer (see, for example, Patent Documents 1 and 2), and in the steel industry, it is used for temperature measurement in the width direction of a steel sheet (see, for example, Patent Document 3).

JP 10-48053 A JP 60-25424 A JP 2006-234593 A

By the way, in the line of hot rolling equipment where the temperature management of the steel sheet is performed with a spot-type radiation thermometer based on a specific point that measures the center in the width direction of the steel sheet, the temperature management range is expanded in the width direction of the steel sheet. When a new scanning radiation thermometer is installed to carry out temperature management, there is a problem in simply replacing the spot radiation thermometer with a new scanning radiation thermometer.
In other words, if the measuring element of the scanning radiation thermometer to be used is different from the measuring element of the spot type radiation thermometer that has been used so far, the measurement must be performed unless the true emissivity of the steel sheet is set. Even if the location is the same, it will show different temperature values, and the emissivity of the steel sheet changes depending on the temperature, surface material, etc. Have difficulty. Therefore, it is impossible to correlate the mutual temperature information as it is. Therefore, the new scanning radiation thermometer alone cannot be correlated with quality control based on reliable temperature information based on the results accumulated so far. There is also a risk of reduction. On the other hand, in order to improve the quality assurance for customers, the management range is expanded in the width direction of the steel plate using a scanning radiation thermometer rather than the quality assurance using a conventional spot radiation thermometer. It is desirable.

  Therefore, the present invention has been made paying attention to such problems, and in a hot rolling equipment line, it is used as a measuring element of a spot type radiation thermometer based on a specific point that has been used so far. On the other hand, when the scanning radiation thermometer to be newly used has a different measuring element, the quality control based on reliable temperature information based on a specific point is inherited, but the steel plate using the scanning radiation thermometer is used. It is an object of the present invention to provide a steel sheet quality control temperature setting device capable of performing management with an expanded management range in the width direction, and a quality control temperature setting method using the same.

  In order to solve the above-mentioned problems, the first invention of the present invention is the quality control temperature by measuring the temperature in the width direction of the steel sheet conveyed in the hot rolling facility with a plurality of radiation thermometers installed on the line. A temperature control temperature setting device for setting a reference spot-type radiation thermometer having a first measuring element and measuring temperature information referred to as a basis for temperature control at a specific point on a steel plate to be conveyed And a scanning radiation thermometer that has a second measuring element different from the first measuring element and measures management temperature information over the entire width of the steel sheet being conveyed, and the same as the second measuring element Measurement from a correction spot-type radiation thermometer having a measuring element and measuring temperature information of the specific point, and temperature information of the correction spot-type radiation thermometer and the reference spot-type radiation thermometer Seeking degrees difference, and having a quality control temperature setting means for correcting the control temperature information of said scanning radiation thermometer on the basis of the measured temperature difference.

  The second invention of the present invention is a method of setting the quality control temperature by measuring the temperature in the width direction of the steel sheet conveyed in the hot rolling facility with a plurality of radiation thermometers installed on the line. The reference spot-type radiation thermometer for measuring the temperature information referred to as the basis of temperature management at a specific point on the steel plate to be transported and having the first measuring element, and the first measuring element A scanning radiation thermometer for measuring management temperature information over the entire width of a steel sheet to be conveyed while having a different second measuring element, and a temperature at the specific point having the same measuring element as the second measuring element Using a correction spot type radiation thermometer for measuring information, a measurement temperature difference is obtained from temperature information between the correction spot type radiation thermometer and the reference spot type radiation thermometer, and this measurement temperature difference is obtained. In Zui it and correcting the control temperature information of the scanning radiation thermometer.

  According to the present invention, in a hot rolling facility line, a reference spot-type radiation thermometer for measuring temperature information that is referred to as a basis of temperature control at a specific point on a steel plate to be conveyed, and the full width of the steel plate. When the measurement elements of the scanning radiation thermometer that measures the management temperature information are different from each other, the same measurement element as the scanning radiation thermometer is used to correct the measurement temperature error caused by the mutual measurement elements. The correction type spot radiation thermometer was installed at a specific point, and the measurement temperature difference was obtained from the temperature information of the correction spot type radiation thermometer and the reference spot radiation thermometer. Since the measurement temperature information of the scanning radiation thermometer is corrected based on the temperature difference, the measurement temperature error caused by the measurement element can be eliminated even for the temperature in the width direction of the steel sheet. Therefore, when the measuring element of the scanning radiation thermometer to be used is different from the measuring element of the spot type radiation thermometer used so far, it is based on reliable temperature information based on a specific point. While succeeding in quality control, it is possible to perform management with an expanded management range in the width direction of the steel sheet using a scanning radiation thermometer.

It is a schematic block diagram explaining one Embodiment of hot rolling equipment provided with the quality control temperature setting apparatus which concerns on this invention. It is a block diagram explaining the structure of the control apparatus of FIG. It is a flowchart explaining the quality control temperature setting process which concerns on this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
As shown in FIG. 1, this hot rolling facility 1 includes a rolling mill row 2 for rolling hot slabs processed into rough bars into a steel plate K having a predetermined plate thickness in order from the upstream side, and a predetermined plate to be conveyed. A cooling device 3 for cooling the thick steel plate K and a coiler 4 for winding the cooled steel plate K are provided.
And on the exit side of the rolling mill row 2, a reference spot type radiation thermometer 5 and a correction spot type radiation temperature installed so as to be able to measure the temperature at the same specific point as the spot type radiation thermometer 5. A total of 6 are installed. A scanning radiation thermometer 7 for measuring management temperature information over the entire width of the steel plate is installed on the exit side of the cooling device 3. Each of the radiation thermometers 5, 6, and 7 receives the radiated light from the steel plate K, which is a measurement object, by the detectors 5a, 6a, and 7a using elements such as silicon, and the detector 5a based on the received light energy. , 6a, 7a and the measurement result obtained from the relationship between the temperature of the steel plate K is output to the computer 8 which is quality control temperature setting means. The management temperature information that has been subjected to predetermined processing (described later) by the computer 8 is stored in the data server 9. In the quality control temperature setting device according to the present invention, each of the radiation thermometers 5, 6 and 7, the computer 8 as the quality control temperature setting means, and the following control temperature information correction processing program executed by the computer 8 Corresponds.

  Here, the spot-type radiation thermometer 5 has been used in the line, while the scanning-type radiation thermometer 7 is newly used. In each of the radiation thermometers 5, 6, and 7, the reference spot-type radiation thermometer 5 is a thermomobile thermometer whose measurement element (first measurement element) is a heat transfer type. The measuring element (second measuring element) of the scanning radiation thermometer 7 is photoelectric PbSe. That is, the second measuring element of the scanning radiation thermometer 7 is different from the first measuring element of the reference spot radiation thermometer 5. Therefore, these cannot be simply compared. Therefore, in the present embodiment, the correction-use spot type radiation thermometer 6 is installed as the third thermometer, and the same photoelectric type as the second measuring element is used as the measuring element of the radiation thermometer 6. PbSe was adopted.

Next, the computer 8 will be described in detail.
As shown in FIG. 2, the computer 8 includes a CPU 30 that controls operations and the entire system based on a predetermined control program, a storage device 42 that stores a control program for the CPU 30 and the like in a predetermined area, and a ROM 32. A RAM 34 for storing data read from the storage device 42, the ROM 32, etc., and a calculation result required in the calculation process of the CPU 30, each radiation thermometer 5, 6, 7, an input device 40, a storage device 42, and a display device 44. And an interface 38 that mediates data input / output, and these are connected to each other via a bus 39, which is a signal line for transferring data, so that data can be exchanged. Then, a predetermined program stored in a predetermined area of the CPU 30, the storage device 42 and the ROM 32 is started, and the following management temperature information correction processing is executed according to the program.

Next, the management temperature information correction process will be described in more detail.
When the management temperature information correction process is executed by the computer 8, as shown in FIG. 3, first, the process proceeds to step S1 to acquire the temperature information from the reference spot type radiation thermometer 5, and the subsequent step S2 Then, the temperature information from the correction type spot radiation thermometer 6 is acquired, and the process proceeds to step S3. In step S3, the measured temperature difference is obtained from the temperature information of the correction spot type radiation thermometer and the reference spot type radiation thermometer, and the process proceeds to step S4. In subsequent step S4, the temperature information from the scanning radiation thermometer 7 is acquired and the process proceeds to step S5. In step S5, the management temperature information of the scanning radiation thermometer 7 is based on the measured temperature difference in step S3. Is shifted to step S6. In the example of the present embodiment, the obtained measured temperature difference is subtracted from the temperature (management temperature information) measured over the entire width of the steel sheet to obtain the corrected temperature (management temperature information). In step S6, the management temperature information corrected in step S5 is stored in the data server 9, and the process returns to step S1.

Next, operations and effects of the above-described quality control temperature setting device and a quality control temperature setting method using the same will be described.
According to the above-mentioned radiation thermometers 5, 6 and 7, the computer 8 as the quality control temperature setting means, and the quality control temperature setting device configured by the following management temperature information correction processing program executed by the computer 8, In the line of the hot rolling facility 1, the temperature information referred to as the basis of temperature management is continuously measured at a specific point on the steel plate K to be transported by the reference spot-type radiation thermometer 5 that has been conventionally used. (Step S1) When the measuring elements of the reference type radiation thermometer 5 and the scanning type radiation thermometer 7 for measuring the management temperature information over the entire width of the steel plate K are different from each other, In order to correct the measurement temperature error caused by the measurement element, a correction spot type radiation thermometer 6 using the same measurement element as the scanning radiation thermometer 7 is installed at a specific point, and this correction is performed. Temperature information for correction is acquired by the spot type radiation thermometer 6 (step S2), and the measured temperature difference is calculated from the temperature information of the spot type radiation thermometer 6 for correction and the spot type radiation thermometer 5 for reference. (Step S3), and the measurement temperature information of the scanning radiation thermometer 7 is corrected based on the measured temperature difference (Steps S4 to S5), and therefore the temperature in the width direction of the steel plate K is also caused by the measurement element. Measurement temperature error can be eliminated.

Therefore, when the measurement element of the scanning radiation thermometer 7 to be newly used is different from the measurement element of the spot radiation thermometer 5 that has been used, the reliable temperature information based on a specific point is used as a basis. While taking over the quality control described above, it is possible to perform management with the management range expanded in the width direction of the steel plate K using the scanning radiation thermometer 7.
The quality control temperature setting device and the quality control temperature setting method using the same according to the present invention are not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. Of course.

DESCRIPTION OF SYMBOLS 1 Hot rolling equipment 2 Rolling machine row 3 Cooling device 4 Coiler 5 Spot type radiation thermometer for reference 6 Spot type radiation thermometer for correction 7 Scanning type radiation thermometer 8 Computer (quality control temperature setting means)
9 Data server

Claims (2)

A quality control temperature setting device that sets the quality control temperature by measuring the temperature in the width direction of the steel sheet conveyed in the hot rolling facility with a plurality of radiation thermometers installed on the line,
A spot-type radiation thermometer for reference that measures temperature information at a specific point on a steel plate to be transported, having temperature information that is referred to as a basis for temperature management while having a first measuring element,
A scanning radiation thermometer that has a second measuring element different from the first measuring element and measures management temperature information over the entire width of the steel sheet being conveyed;
A spot-type radiation thermometer for correction having the same measuring element as the second measuring element and measuring temperature information at the specific point;
A measurement temperature difference is obtained from temperature information of the correction spot type radiation thermometer and the reference spot type radiation thermometer, and the management temperature information of the scanning radiation thermometer is corrected based on the measurement temperature difference. A quality control temperature setting device for a steel sheet, comprising quality control temperature setting means. It is a method of setting the quality control temperature by measuring the temperature in the width direction of the steel sheet conveyed in the hot rolling facility with a plurality of radiation thermometers installed on the line,
A spot-type radiation thermometer for reference that measures temperature information at a specific point on a steel plate to be transported, having temperature information that is referred to as a basis for temperature management while having a first measuring element,
A scanning radiation thermometer that has a second measuring element different from the first measuring element and measures management temperature information over the entire width of the steel sheet being conveyed;
Using a spot radiation thermometer for correction that has the same measurement element as the second measurement element and measures the temperature information of the specific point,
A measurement temperature difference is obtained from temperature information of the correction spot type radiation thermometer and the reference spot type radiation thermometer, and the management temperature information of the scanning radiation thermometer is corrected based on the measurement temperature difference. A quality control temperature setting method for a steel sheet, characterized by:

Images