CN113843282A - Online monitoring method for rolling rhythm of medium plate - Google Patents
Online monitoring method for rolling rhythm of medium plate Download PDFInfo
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- 238000005096 rolling process Methods 0.000 title claims abstract description 164
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 35
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 76
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Abstract
The invention discloses an on-line monitoring method for the rolling rhythm of a medium plate, which relates to the technical field of automatic control of steel rolling and is used for collecting data in real time; automatically starting a wide and thick plate rolling rhythm monitoring and analyzing module to calculate according to a triggering event; index calculation is carried out on the rhythm time of the heating furnace according to the number of the steel plates; carrying out index calculation on the rhythm time of the heating furnace according to the average; index calculation is carried out on the rhythm time of the rolling mill; carrying out index calculation on the rhythm of the temperature to be treated according to the number of the steel plates; carrying out index calculation on the rhythm of the temperature to be treated according to the average; index calculation is carried out on the cooling time of the intermediate blank; index calculation is carried out on the ACC cooling rhythm time; performing index calculation on the temperature correction rhythm time; index calculation is carried out on the hot correcting rhythm time; carrying out index calculation on the total rhythm time; carrying out index calculation on the occupation probability of the rolling mill; and carrying out index calculation on the yield per unit time.
Description
Technical Field
The invention relates to the technical field of steel rolling automatic control, in particular to an on-line monitoring method for the rolling rhythm of a medium plate.
Background
The rolling rhythm refers to the tapping time interval between two adjacent steel billets. The targets of the rolling rhythm control are: on the premise of not causing the collision of two adjacent steel billets on a rolling line, the rolling rhythm is accelerated as much as possible so as to improve the production capacity. In order to be referred by field personnel, the rolling rhythm needs to be monitored, and the rolling rhythm monitoring can not only summarize the rolling rhythm overview in real time, but also compare indexes of the rolling rhythm to find an area capable of optimizing the rhythm.
The research result of monitoring the rolling rhythm of the medium plate is as follows: the patent application with the application number of CN101264484B discloses a middle plate high-speed rolling process, which effectively shortens the temperature control time to be rolled by increasing the reduction rate of one rolling process, can reduce the rolling passes, quickens the rolling rhythm, improves the production efficiency of the middle plate and increases the yield while keeping the structural performance of the middle plate qualified.
The invention patent application with the application number of CN110773570B discloses a method for improving the rolling rhythm of a 5-meter rolling mill, which improves the speed of a steel rolling roller way and the steel throwing passing speed and shortens the steel throwing distance between passes by optimizing the control logic of the roll gap action and the roll shifting action, so that the rolling rhythm is obviously improved, and finally, the rolling time of each steel plate is reduced by 18.4 seconds on average. According to the method, a priority constraint graph maps the ordering relation and the constraint condition into a linear programming model, and finally the optimal discharging time of each billet is obtained by solving the linear programming model, so that the occupancy rate of a rolling mill is increased to 72.2% in the case, and the core content of the method is the basic theory and the application of the slab tapping rhythm control method.
The prior art introduces all-round in the aspects of process design, control system optimization and the like of medium and thick plate rolling rhythm, and provides a small amount of evaluation indexes of the rolling rhythm so as to prove that the technology improves the medium and thick plate rolling rhythm when rolling certain plate blanks. None of the above prior art techniques systematically involves on-line monitoring of the rolling rhythm of the medium plate.
Disclosure of Invention
The invention aims to solve the technical problem that the prior art is lack of on-line monitoring of the rolling rhythm of the medium plate.
In order to solve the above technical problems, the present invention provides an on-line monitoring method for the rolling rhythm of a medium plate, comprising the following steps,
step S201, data are collected in real time, and the data collection comprises the following steps: slab steel type, slab specification, target specification, charging/discharging time, rolling mode, outlet length of each pass, outlet speed of each pass, total rolling pass, rolling initial rolling temperature of the second stage, rolling initial rolling thickness of the second stage, steel biting/throwing time of each pass, starting/ending time of waiting for temperature, water passing starting/ending time of intermediate slab, pre-straightening starting/ending time, ACC starting/ending time, temperature straightening starting/ending time and heat straightening starting/ending time;
step S202, automatically starting a wide and thick plate rolling rhythm monitoring and analyzing module to calculate according to a trigger event;
step S203, index calculation is carried out on the rhythm time of the heating furnace according to the number of the steel plates;
step S204, index calculation is carried out on the rhythm time of the heating furnace according to the average value;
step S205, index calculation is carried out on rhythm time of the rolling mill;
step S206, index calculation is carried out on the rhythm of the temperature to be treated according to the number of the steel plates;
step S207, carrying out index calculation on the rhythm of the temperature to be treated according to the average;
step S208, index calculation is carried out on the cooling time of the intermediate blank;
step S209, index calculation is carried out on the ACC cooling rhythm time;
step S210, index calculation is carried out on the temperature correcting rhythm time;
step S211, index calculation is carried out on the hot rectification rhythm time;
step S212, index calculation is carried out on the total rhythm time;
step S213, index calculation is carried out on the occupation probability of the rolling mill;
step S214, index calculation is carried out on the yield per unit time.
In steps S203 and S204, the heating furnace rhythm time is indexed by the number of steel plate pieces as follows, based on the tapping time y ″1,actAnd time to furnace y'1,actThe furnace time y is obtained by calculation1,actThe formula is as follows:
y1,act＝y″1,act-y′1,act
and (3) carrying out index calculation on the rhythm time of the heating furnace according to the average:
according to the number y of steel plates according to the rhythm time of the heating furnace1,actAnd the number of furnace slabs N1Determining the rhythm time of the heating furnace according to the average y2,actThe formula is as follows:
y2,act＝y1,act/N1。
in step S205, the rolling mill rhythm time is indexed as follows, and y 'is obtained according to the first pass steel biting time of the first-stage rolling'3,actAnd the steel throwing time y' of the last pass of the first stage rolling3,actAnd the first-pass steel biting moment y 'in the second-stage rolling'3,actAnd the steel throwing time y' of the last pass of the second stage rolling3,actCalculating the rhythm time y of the rolling mill3,actThe formula is as follows:
y3,act＝(y″3,act-y′3,act)+(y″″3,act-y″″3,act)。
in step S206, the index of the rolling rhythm of the medium plate is calculated according to the number of the steel plates, and the steel throwing time y ″' at the last pass of the first stage rolling is determined3,actAnd the first-pass steel biting moment y 'in the second-stage rolling'3,actCalculating the rhythm time of waiting temperature according to the number y of the steel plates4,actThe formula is as follows:
y4,act＝y″′3,act-y″3,act。
in the above-mentioned on-line monitoring method for the rolling rhythm of the medium plate, in step S207, the average index of the rhythm of the temperature to be treated is calculated as follows,
if the rolling mode is single-billet rolling, the temperature-waiting rhythm time is according to the average y5,actEqual to the rhythm time of waiting temperature according to the number y of steel plates4,actThe formula is as follows:
y5,act＝y4,act
if the rolling mode is double-billet rolling, according to the second temperature waiting rhythm time and the number y 'of steel plates'5,actAnd the first stage rolling time y ″ of the first block5,actThe temperature rhythm time can be calculated according to the average y5,actThe formula is as follows:
y″5,act＝y″5,act,end-y5,act,start
y5,act＝(y′5,act-y″5,act)/2
in the above formula, y ″)5,set,start、y″5,set,endRespectively showing the first-pass steel biting time of the first-stage rolling of the double-blank rolling and the last-pass steel throwing time of the first-stage rolling of the first block;
if the rolling mode is three-billet group rolling, according to the second temperature waiting rhythm time and the number y 'of steel plates'5,actThird first stage rolling time y ″)5,actFirst second stage Rolling time y'5,′actThe temperature rhythm time can be calculated according to the average y5,actThe formula is as follows:
y″5,act＝y″5,act,end-y″5,act,start
y″′5,set＝y″′5,set,end-y″′5,set,start
y5,set＝(y′5,set-y″5,set-y″′5,set)/3
in the above formula, y ″)5,act,start、y″5,act,endThe steel biting time of the first pass of the third first-stage rolling and the steel throwing time of the last pass of the third first-stage rolling are expressed as y'5,act,start、y″′5,act,endAnd the steel biting time of the first pass of the first and second-stage rolling of the three billets and the steel throwing time of the last pass of the first and second-stage rolling are shown.
In the above-mentioned method for monitoring the rolling rhythm of the medium plate on line, in step S208 and step S209, the index of the cooling time of the intermediate slab is calculated as follows according to the m-th time water-through cooling-off time y'6,act(m) end cooling time y6,act(m) calculating the cooling rhythm time y of the intermediate blank6,actThe formula is as follows:
in the above formula, N6Represents the total number of water penetrations;
the index for the ACC cooling rhythm time is calculated as follows,
according to the m-th water penetration and cold start time y'7,act(m) end cooling time y7，act(m) calculating the ACC Cooling rhythm time y7,actThe formula is as follows:
in the above formula, N7Representing the total number of water passes.
In the above-mentioned method for monitoring the rolling rhythm of the medium plate on line, in step S210 and step S211, the index of the hot straightening rhythm time is calculated as follows according to the m straightening start time y'8,act(m), end time y ″)8,act(m) calculating the temperature correction rhythm time y8,actThe formula is as follows:
in the above formula, N8Represents the total straightening times;
the index calculation of the thermal correction tempo time is as follows,
according to the m straightening start time y'9,act(m), end time y ″)9,act(m) calculating the thermally corrected tempo time y9,actThe formula is as follows:
in the above formula, N9Indicating the total straightening times.
In the aforementioned method for monitoring the rolling rhythm of the medium plate on line, in step S212, the maximum value y of the total rhythm time is measured10,actThe formula is as follows:
y10,act＝max(y2,act,(y3,act+y5,act+y6,act),y7,act,y8,act,y9,act)+ysafe
in the above formula, ysafeFor avoiding collision between slabsAnd (7) safe time.
In the above-mentioned on-line monitoring method for the rolling rhythm of the medium plate, in step S213, the occupation rate y of the rolling mill is monitored as an index12,actThe calculation formula is as follows:
y12,act＝y3,act/y10,act*100。
in the above-mentioned method for monitoring the rolling rhythm of the medium plate on line, in step S214, the output y per unit time is measured13,actThe calculation formula is as follows:
y13,act＝w13,act/y10,act。
the invention has the beneficial effects that:
according to the invention, the monitoring content of the rolling rhythm of the medium plate is decomposed into a plurality of specific indexes which are easy to quantify and collect data, the numerical values of the monitoring indexes are respectively calculated, and statistical information such as the position of a rhythm bottleneck and the occupation probability of a rolling mill is displayed; the method can judge the rolling speed of the medium plate in real time, and provides help for timely judging the bottleneck of the rolling speed and improving the yield in a production field.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The method for monitoring the rolling rhythm of the medium plate on line provided by the embodiment can be realized by an electronic device, which can be a terminal or a server, as shown in fig. 1, and comprises the following steps,
step S201, data are collected in real time, and the data collection comprises the following steps: slab steel type, slab specification, target specification, charging/discharging time, rolling mode, outlet length of each pass, outlet speed of each pass, total rolling pass, rolling initial rolling temperature of the second stage, rolling initial rolling thickness of the second stage, steel biting/throwing time of each pass, starting/ending time of waiting for temperature, water passing starting/ending time of intermediate slab, pre-straightening starting/ending time, ACC starting/ending time, temperature straightening starting/ending time and heat straightening starting/ending time; and S202, automatically starting a wide and thick plate rolling rhythm monitoring and analyzing module to calculate according to a trigger event.
And the triggering time sequence is calculated by a starting module after the plate blank leaves the rolling line.
Step S203, index calculation is carried out on the rhythm time of the heating furnace according to the number of the steel plates;
the index of the rhythm time of the heating furnace according to the number of the steel plates is calculated as follows according to the tapping time y ″1,actAnd time to furnace y'1,actThe furnace time y is obtained by calculation1,actThe formula is as follows:
y1,act＝y″1,act-y′1,act。
and step S204, index calculation is carried out on the rhythm time of the heating furnace according to the average value.
According to the number y of steel plates according to the rhythm time of the heating furnace1,actAnd the number of furnace slabs N1Determining the rhythm time of the heating furnace according to the average y2,actThe formula is as follows:
y2,act＝y1,act/N1。
and step S205, index calculation is carried out on the rhythm time of the rolling mill.
The rhythm time of the rolling mill is indexed as follows, and according to the first-pass steel biting time y 'of the first-stage rolling'3,actAnd the steel throwing time y' of the last pass of the first stage rolling3，actAnd the first-pass steel biting moment y 'in the second-stage rolling'3,actAnd the steel throwing time y' of the last pass of the second stage rolling3,actCalculating the rhythm time y of the rolling mill3,actThe formula is as follows:
y3,act＝(y″3,act-y′3,act)+(y″″3,act-y″′3,act)。
and step S206, performing index calculation on the rhythm of the temperature to be treated according to the number of the steel plates.
The index calculation is carried out on the rhythm of the temperature according to the number of the steel plates as follows,
according to the steel throwing time y' of the last pass of the first stage rolling3,actAnd the first-pass steel biting moment y 'in the second-stage rolling'3,actCalculating the rhythm time of waiting temperature according to the number y of the steel plates4,actThe formula is as follows:
y4,act＝y″′3,act-y″3,act。
and step S207, carrying out index calculation on the rhythm of the to-be-warmed rhythm according to the average.
The average index calculation of the rhythm of the temperature to be treated is as follows,
if the rolling mode is single-billet rolling, the temperature-waiting rhythm time is according to the average y5,actEqual to the rhythm time of waiting temperature according to the number y of steel plates4,actThe formula is as follows:
y5,act＝y4,act
if the rolling mode is double-billet rolling, according to the second temperature waiting rhythm time and the number y 'of steel plates'5,actAnd the first stage rolling time y ″ of the first block5actThe temperature rhythm time can be calculated according to the average y5,actThe formula is as follows:
y″5,act＝y″5,act,end-y″5,act,start
y5,act＝(y′5,act-y″5,act)/2
in the above formula, y ″)5,set,start、y″5,set,endRespectively showing the first-pass steel biting time of the first-stage rolling of the double-blank rolling and the last-pass steel throwing time of the first-stage rolling of the first block;
if the rolling mode is three-billet group rolling, according to the second temperature waiting rhythm time and the number y 'of steel plates'5,actThird first stage rolling time y ″)5,actFirst second stage Rolling time y'5,actThe temperature rhythm time can be calculated according to the average y5,actThe formula is as follows:
y″5,act＝y″5,act,end-y″5,act,start
y″′5,set＝y″′5,set,end-y″′5,set,start
y5,set＝(y′5,set-y″5,set-y″″5,set)/3
in the above formula, y ″)5,act,start、y″5,act,endShowing the first steel biting time of the third first-stage rolling of the three billets and the last steel throwing time of the third first-stage rollingMoment y'5,act,start、y″′5,act,endAnd the steel biting time of the first pass of the first and second-stage rolling of the three billets and the steel throwing time of the last pass of the first and second-stage rolling are shown.
And step S208, index calculation is carried out on the cooling time of the intermediate blank.
The index of the cooling time of the intermediate slab was calculated from the m-th water-through cooling time y'6,act(m) end cooling time y6,act(m) calculating the cooling rhythm time y of the intermediate blank6,actThe formula is as follows:
in the above formula, N6Representing the total number of water passes.
In step S209, index calculation is performed on the ACC cooling rhythm time.
The index for the ACC cooling rhythm time is calculated as follows,
according to the m-th water penetration and cold start time y'7,act(m) end cooling time y7,act(m) calculating the ACC Cooling rhythm time y7,actThe formula is as follows:
in the above formula, N7Representing the total number of water passes.
Step S210, index calculation is carried out on the temperature correcting rhythm time;
index calculation of the hot straightening rhythm time is performed according to the m-th straightening start time y'8,act(m), end time y ″)8,act(m) calculating the temperature correction rhythm time y8,actThe formula is as follows:
in the above formula, N8Indicating the total straightening times.
In step S211, index calculation is performed on the thermally corrected tempo time.
The index calculation of the thermal correction tempo time is as follows,
according to the m straightening start time y'9,act(m), end time y ″)9,act(m) calculating the thermally corrected tempo time y9,actThe formula is as follows:
in the above formula, N9Indicating the total straightening times.
Step S212, index calculation is performed on the total tempo time.
For the maximum value y of the total rhythm time10,actThe formula is as follows:
y10,act＝max(y2,act,(y3,act+y5,act+y6,act),y7,act,y8,act,y9,act)+ysafe
in the above formula, ysafeTo provide a safe time for avoiding collision between slabs.
And step S213, index calculation is carried out on the occupation probability of the rolling mill.
Monitoring index rolling mill occupation rate y12,actThe calculation formula is as follows:
y12,act＝y3,act/y10,act*100。
step S214, index calculation is carried out on the yield per unit time.
For yield y per unit time13,actThe calculation formula is as follows:
y13,act＝w13,act/y10,act。
the effect of the method of the present embodiment will be described with reference to specific application examples.
The method is applied to a certain medium plate production line, the rolling rhythm monitoring index results of the embodiment are shown in table 1, and the calculation results of each index of the rolling rhythm, the rhythm bottleneck and the like can be quickly inquired from table 1.
TABLE 1 table of results of monitoring index calculation for rolling rhythm of medium plate
In summary, in the embodiment, the monitoring content of the rolling rhythm of the medium plate is decomposed into a plurality of specific indexes which are easy to quantify and collect data, the numerical values of the monitoring indexes are respectively calculated, and statistical information such as the position of the bottleneck of the rhythm and the occupation rate of the rolling mill is displayed; the method can judge the rolling speed of the medium plate in real time, and provides help for timely judging the bottleneck of the rolling speed and improving the yield in a production field.
In addition to the above embodiments, the present invention may have other embodiments; all technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (10)
1. An on-line monitoring method for the rolling rhythm of a medium plate is characterized in that: comprises the following steps of (a) carrying out,
step S201, data are collected in real time, and the data collection comprises the following steps: slab steel type, slab specification, target specification, charging/discharging time, rolling mode, outlet length of each pass, outlet speed of each pass, total rolling pass, rolling initial rolling temperature of the second stage, rolling initial rolling thickness of the second stage, steel biting/throwing time of each pass, starting/ending time of waiting for temperature, water passing starting/ending time of intermediate slab, pre-straightening starting/ending time, ACC starting/ending time, temperature straightening starting/ending time and heat straightening starting/ending time;
step S202, automatically starting a wide and thick plate rolling rhythm monitoring and analyzing module to calculate according to a trigger event;
step S203, index calculation is carried out on the rhythm time of the heating furnace according to the number of the steel plates;
step S204, index calculation is carried out on the rhythm time of the heating furnace according to the average value;
step S205, index calculation is carried out on rhythm time of the rolling mill;
step S206, index calculation is carried out on the rhythm of the temperature to be treated according to the number of the steel plates;
step S207, carrying out index calculation on the rhythm of the temperature to be treated according to the average;
step S208, index calculation is carried out on the cooling time of the intermediate blank;
step S209, index calculation is carried out on the ACC cooling rhythm time;
step S210, index calculation is carried out on the temperature correcting rhythm time;
step S211, index calculation is carried out on the hot rectification rhythm time;
step S212, index calculation is carried out on the total rhythm time;
step S213, index calculation is carried out on the occupation probability of the rolling mill;
step S214, index calculation is carried out on the yield per unit time.
2. The method for on-line monitoring the rolling rhythm of the medium plate according to claim 1, wherein: in steps S203 and S204, the heating furnace rhythm time is index-calculated by the number of steel plate pieces as follows,
according to the tapping time y1,actAnd time to furnace y'1,actThe furnace time y is obtained by calculation1,actThe formula is as follows:
y1,act＝y″1,act-y′1,act
and (3) carrying out index calculation on the rhythm time of the heating furnace according to the average:
according to the number y of steel plates according to the rhythm time of the heating furnace1,actAnd the number of furnace slabs N1Determining the rhythm time of the heating furnace according to the average y2,actThe formula is as follows:
y2,act＝y1,act/N1。
3. the method for on-line monitoring the rolling rhythm of the medium plate according to claim 1, wherein: in step S205, the rolling mill cadence time is indexed as follows, according to the first orderY 'at first-pass steel biting moment of sectional rolling'3,actAnd the steel throwing time y' of the last pass of the first stage rolling3,actAnd the first-pass steel biting moment y 'in the second-stage rolling'3,actAnd the steel throwing time y' of the last pass of the second stage rolling3,actCalculating the rhythm time y of the rolling mill3,actThe formula is as follows:
y3,act＝(y″3,act-y′3,act)+(y″″3,act-y″′3,act)。
4. the method for on-line monitoring the rolling rhythm of the medium plate according to claim 1, wherein: in step S206, the index of the rhythm of the temperature to be treated is calculated according to the number of the steel plates as follows,
according to the steel throwing time y' of the last pass of the first stage rolling3,actAnd the first-pass steel biting moment y 'in the second-stage rolling'3,actCalculating the rhythm time of waiting temperature according to the number y of the steel plates4,actThe formula is as follows:
y4,act＝y″′3,act-y″3,act。
5. the method for on-line monitoring the rolling rhythm of the medium plate according to claim 1, wherein: in step S207, the index calculation is performed on the average for the tempo to be warmed as follows,
if the rolling mode is single-billet rolling, the temperature-waiting rhythm time is according to the average y5,actEqual to the rhythm time of waiting temperature according to the number y of steel plates4,actThe formula is as follows:
y5,act＝y4,act
if the rolling mode is double-billet rolling, according to the second temperature waiting rhythm time and the number y 'of steel plates'5,actAnd the first stage rolling time y ″ of the first block5,actThe temperature rhythm time can be calculated according to the average y5,actThe formula is as follows:
y″5,act＝y″5,act,end-y″5,act,start
y5,act＝(y′5act-y″5,act)/2
in the above formula, y ″)5,set,start、y″5,set,endRespectively showing the first-pass steel biting time of the first-stage rolling of the double-blank rolling and the last-pass steel throwing time of the first-stage rolling of the first block;
if the rolling mode is three-billet group rolling, according to the second temperature waiting rhythm time and the number y 'of steel plates'5，actThird first stage rolling time y ″)5,actFirst second stage Rolling time y'5,actThe temperature rhythm time can be calculated according to the average y5,actThe formula is as follows:
y″5,act＝y″5,act,end-y″5,act,start
y″′5,set＝y″′5,set,end-y″′5,set,start
y5,set＝(y′5,set-y″5,set-y″′5,set)/3
in the above formula, y ″)5,act,start、y″5,act,endThe steel biting time of the first pass of the third first-stage rolling and the steel throwing time of the last pass of the third first-stage rolling are expressed as y'5,act,start、y″′5,act,endAnd the steel biting time of the first pass of the first and second-stage rolling of the three billets and the steel throwing time of the last pass of the first and second-stage rolling are shown.
6. The method for on-line monitoring the rolling rhythm of the medium plate according to claim 1, wherein: in steps S208 and S209, the index of the cooling time of the intermediate material is calculated as follows from the m-th water-through cooling start time y'6,act(m) end cooling time y6,act(m) calculating the cooling rhythm time y of the intermediate blank6,actThe formula is as follows:
in the above formula, N6Represents the total number of water penetrations;
the index for the ACC cooling rhythm time is calculated as follows,
according to the m-th water penetration and cold start time y'7,act(m) end cooling time y7,act(m) calculating the ACC Cooling rhythm time y7,actThe formula is as follows:
in the above formula, N7Representing the total number of water passes.
7. The method according to claim 1, wherein in steps S210 and S211, the index of the hot straightening rhythm time is calculated according to the m straightening start time y'8,act(m), end time y ″)8,act(m) calculating the temperature correction rhythm time y8,actThe formula is as follows:
in the above formula, N8Represents the total straightening times;
the index calculation of the thermal correction tempo time is as follows,
according to the m straightening start time y'9,act(m), end time y ″)9,act(m) calculating the thermally corrected tempo time y9,actThe formula is as follows:
in the above formula, N9Indicating the total straightening times.
8. The method for on-line monitoring the rolling rhythm of the medium plate according to claim 1, wherein in step S212, the total rhythm time is measuredMaximum value y10,actThe formula is as follows:
y10,act＝max(y2,act,(y3,act+y5,act+y6,act),y7,act,y8,act,y9,act)+ysafe
in the above formula, ysafeTo provide a safe time for avoiding collision between slabs.
9. The on-line monitoring method for the rolling mill pass of the medium plate as claimed in claim 1, wherein in step S213, the percentage of occupation y of the rolling mill is monitored12,actThe calculation formula is as follows:
y12,act＝y3,act/y10,act*100。
10. the method of claim 1, wherein in step S214, the output y per unit time is monitored13,actThe calculation formula is as follows:
y13,act＝w13,act/y10,act。
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