CN114136355A - Method for quickly correcting stroke control encoder of blast furnace main coil car - Google Patents
Method for quickly correcting stroke control encoder of blast furnace main coil car Download PDFInfo
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- CN114136355A CN114136355A CN202111343651.7A CN202111343651A CN114136355A CN 114136355 A CN114136355 A CN 114136355A CN 202111343651 A CN202111343651 A CN 202111343651A CN 114136355 A CN114136355 A CN 114136355A
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Abstract
The invention discloses a method for quickly correcting a stroke control encoder of a main coil car of a blast furnace, belongs to the technical field of automatic control of the blast furnace, and solves the problem that the stroke control encoder of the main coil car of the blast furnace is difficult to correct. The method comprises the following steps: the equipment is firstly online and is measured by a feeding trolley running beside the machine, and relative code values among limit points are obtained; after the origin of the encoder is changed, calculating the corresponding parameter values of the limit points by using the relative code values among the limit points; and calculating the accumulated code value of the encoder, comparing the calculation result with the parameter value corresponding to each limit point, and judging the position of the skip car. The invention solves the problem of quickly correcting the encoder when the stroke detection of the skip car is wrong due to abnormal power failure, loosening of a mechanical connector, replacement of a steel wire rope of a main coiling motor, replacement of the encoder and the like of the stroke control encoder of the main coiling skip car, can reduce the fault processing time to 2 minutes/time, greatly improves the equipment maintenance efficiency and ensures the stable and smooth operation of a blast furnace.
Description
Technical Field
The invention belongs to the technical field of automatic control of blast furnaces, and particularly relates to a method for quickly correcting a stroke control encoder of a main coil car of a blast furnace.
Background
The main hoisting skip feeding system is a feeding mode adopted by most domestic iron-making blast furnaces at present. As an important component of skip car stroke detection, the intelligent master controller replaces an old cam master controller to be widely applied to a blast furnace main hoisting skip car stroke detection system due to the advantages of reliable operation, high response speed, high precision and the like. Once the control system has the fault of wrong detection of the skip car stroke, the processing time is averagely 2 hours/time, the time and the labor are wasted, the processing efficiency is low, and the continuous production of the blast furnace is seriously influenced.
The blast furnace skip car limit control system is controlled by two independent ZNLK series intelligent master controllers. The series master controller consists of an S7-200 processor, a Siemens operation panel TD200 and a rotary encoder, and the starting, stopping and speed of the skip are accurately controlled by feeding back signals through an absolute encoder at the shaft end of a main reduction gear and calculating the trip of the skip through the S7-200 processor. Once the encoder feeds back errors or the processor calculates errors, the skip car is directly out of control, serious equipment accidents such as skip car top rushing and hanging are caused, and therefore whether skip car travel detection is accurate or not plays an important role in normal production of the blast furnace.
Although the ZNLK series intelligent master control system has the advantages of reliable operation, high response speed, high precision and the like, three problems exist since the online process: firstly, when the control program is downloaded again or the processor is electrified again, the parameter values of the encoder in the skip journey interval are lost (all are 0), and the skip journey detection error is inevitably caused; secondly, after the absolute encoder adopting 8-bit Gray code encoding needs to be powered off due to abnormity or maintenance, if the trolley is changed in displacement, the detected trolley travel will be wrong when power supply is restored; thirdly, the encoder catcher of the main winding motor is loosened, the main winding steel wire rope is replaced, the encoder is replaced and the like, so that the original point of the encoder is changed, and the stroke detection of the skip car is inaccurate.
When the first situation occurs, the electrical maintenance personnel needs to reset the interval parameters of the 12 limit points through the TD200 panel, on the premise that the maintenance personnel records the previous parameter values, otherwise, the parameter values are difficult to recover; when two kinds of situations take place in the back, need electrical personnel to step on the main roll motor, unpack encoder and motor shaft connection end cover apart, rectify through manual rotary encoder, the processing time is longer, has caused serious influence to the continuous production of blast furnace to there are the eminence to fall, major safety risks such as mechanical injury.
Disclosure of Invention
The invention aims to provide a method for quickly correcting a stroke control encoder of a blast furnace main coil car, so as to solve the problem that the stroke control encoder of the blast furnace main coil car is difficult to correct.
The technical scheme of the invention is as follows: a method for quickly correcting a stroke control encoder of a blast furnace main coil car comprises the following steps:
A. the equipment is firstly online and is measured by a feeding trolley running beside the machine, and relative code values among limit points are obtained;
B. after the origin of the encoder is changed, calculating the corresponding parameter values of the limit points by using the relative code values among the limit points calculated in the step A;
C. after the origin of the encoder is changed, the encoder code value algorithm is optimized by using the following formula:
wherein,
in order to accumulate the code values,
in order to accumulate the number of turns,
is a real-time value during the rotation of the encoder,
the initial code value of the encoder when the skip car is at the origin,
；
D. and C, comparing the calculation result of the step C with the parameter values corresponding to the limit points calculated in the step B, and accurately judging the position of the skip car.
Further, in step C, the number of turns is accumulated
The algorithm of (1) is as follows: using the principle of periodic execution of PLC program
Value minus last cycle
The value, the result of which is two cases,
when a transition from 255 to 0 occurs during the increase,
the counting is triggered to be added,
adding 1; when in use
During the decrease, when transitioning from 0 to 255,
and the count-down is triggered to be performed,
minus 1.
The invention has the beneficial effects that: the invention solves the problem of quickly correcting the encoder when the stroke detection of the skip car is wrong due to abnormal power failure, loosening of a mechanical connector, replacement of a steel wire rope of a main coiling motor, replacement of the encoder and the like, the equipment is firstly online and is measured by a feeding trolley running beside the machine to obtain the relative code values between the limit points, and when the encoder needs to be corrected later, the position of the skip car can be quickly and accurately judged only by calculating the accumulated code value and the parameter values corresponding to the limit points and comparing the accumulated code value and the parameter values, so that the fault processing time caused by the encoder can be reduced to 2 minutes/time, the maintenance efficiency of the equipment is greatly improved, and the stable and smooth operation of a blast furnace is ensured.
Drawings
Fig. 1 is a schematic diagram of a skip run in an embodiment of the present invention.
Detailed Description
Examples 1,
A method for quickly correcting a stroke control encoder of a blast furnace main coil car comprises the following operation steps:
s1, determining the equipment on line for the first time by running a feeding trolley beside the machine to obtain the relative code values between the limit points. Fig. 1 is a skip car travel diagram, the north car is taken as a main control car, and the north car is taken as the origin. The skip car has 6 limit points in the ascending process, and the limit points are sequentially 'bottom', first reduction ', second detection', terminal 'and overrun'. Before reaching the first subtraction, the high-speed uplink stage is carried out; the intermediate speed ascending stage is formed between the first reduction and the second reduction; the low-speed ascending stage is formed between the second reduction and the second detection; the secondary inspection point inspects whether a receiving hopper at the top of the blast furnace has a feeding condition or not, and when the receiving hopper does not have the feeding condition, the skip car stops at the secondary inspection point and waits for the condition to be met, the skip car moves upwards at a low speed to a terminal to stop; and when the condition is met, the vehicle can directly stop at the 'terminal'. The north car is corresponding to the south car to go down when going up. The relative interval "r to r" from each limit point to the origin is shown in fig. 1, and the relative code values between the limit points are as follows:
interval (i) -3986;
interval 2-4296;
interval (c) -4506;
interval iv-4758;
interval fifthly-4786;
interval of sixty to 32;
interval (c) — 237;
the interval is the interval of the eight to eight;
the interval ninthly- -748;
interval r-4758.
S2, according to the values of the interval from (r) to (r), the parameter values corresponding to each limit point can be calculated quickly, the calculation method is shown in Table 1, VW100 is the original point code value, namely the value in the formula
The value is obtained.
S3 optimizing number of encoder turns
Cumulative algorithm, using the principle of periodic execution of PLC program
Value minus last cycle
The value, the result of which is two cases,
when a transition from 255 to 0 occurs during the increase,
the counting is triggered to be added,
adding 1; when in use
During the decrease, when transitioning from 0 to 255,
and the count-down is triggered to be performed,
minus 1, and two adjacent circlesThe jump of code value in period can not exceed 55, so the calculation mode can ensure
And (6) accurately counting.
S4, after the origin of the encoder is changed, optimizing an encoder code value algorithm by using the following formula:
wherein,
in order to accumulate the code values,
in order to accumulate the number of turns,
is a real-time value during the rotation of the encoder,
the initial code value of the encoder when the skip car is bottom at the origin.
And S5, comparing the calculation result of the step S4 with the parameter values corresponding to the limit points calculated in the step S2, and judging the position of the skip according to the table 2.
The method can quickly correct the travel control encoder of the blast furnace main coil car, reduce the fault processing time caused by the encoder to 2 minutes/time, greatly improve the equipment maintenance efficiency and ensure the stable and smooth operation of the blast furnace.
Claims (2)
1. A method for quickly correcting a stroke control encoder of a blast furnace main coil car is characterized by comprising the following steps:
A. the equipment is firstly online and is measured by a feeding trolley running beside the machine, and relative code values among limit points are obtained;
B. after the origin of the encoder is changed, calculating the corresponding parameter values of the limit points by using the relative code values among the limit points calculated in the step A;
C. the encoder code value algorithm is optimized using the following formula:
wherein,
in order to accumulate the code values,
in order to accumulate the number of turns,
is a real-time value during the rotation of the encoder,
the initial code value of the encoder when the skip car is at the origin,
；
D. and C, comparing the calculation result of the step C with the parameter values corresponding to the limit points calculated in the step B, and judging the position of the skip car.
2. The method for the rapid calibration of the blast furnace main coil car stroke control encoder as claimed in claim 1, wherein: in step C, the number of turns is accumulated
The algorithm of (1) is as follows: using PLCPrinciple of program cycle execution, using cycle
Value minus last cycle
The value, the result of which is two cases,
when a transition from 255 to 0 occurs during the increase,
the counting is triggered to be added,
adding 1; when in use
During the decrease, when transitioning from 0 to 255,
and the count-down is triggered to be performed,
minus 1.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115196529A (en) * | 2022-07-06 | 2022-10-18 | 广东奥科伟业科技发展有限公司 | Electronic limiting protection method for clothes airing machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100037348A (en) * | 2008-10-01 | 2010-04-09 | 주식회사 포스코 | System and method for feedback control in charging charging material within top of blast furnace |
| KR20110053127A (en) * | 2009-11-13 | 2011-05-19 | (주)포스프로 | Position measuring apparatus for charging materials of blast furnace |
| CN102703633A (en) * | 2012-06-06 | 2012-10-03 | 中冶南方工程技术有限公司 | Furnace top stock-level detection system for blast furnace |
| CN102703632A (en) * | 2012-06-06 | 2012-10-03 | 中冶南方工程技术有限公司 | Detection method for blast furnace top material level |
| CN106086268A (en) * | 2016-06-20 | 2016-11-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of method of quick correction blast furnace roof bus type encoder code value |
| CN108708064A (en) * | 2018-04-16 | 2018-10-26 | 广东创达自动化装备有限公司 | The on-line automatic error correction method of knitted jacquard machine absolute value encoder and system |
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- 2021-11-13 CN CN202111343651.7A patent/CN114136355A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100037348A (en) * | 2008-10-01 | 2010-04-09 | 주식회사 포스코 | System and method for feedback control in charging charging material within top of blast furnace |
| KR20110053127A (en) * | 2009-11-13 | 2011-05-19 | (주)포스프로 | Position measuring apparatus for charging materials of blast furnace |
| CN102703633A (en) * | 2012-06-06 | 2012-10-03 | 中冶南方工程技术有限公司 | Furnace top stock-level detection system for blast furnace |
| CN102703632A (en) * | 2012-06-06 | 2012-10-03 | 中冶南方工程技术有限公司 | Detection method for blast furnace top material level |
| CN106086268A (en) * | 2016-06-20 | 2016-11-09 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of method of quick correction blast furnace roof bus type encoder code value |
| CN108708064A (en) * | 2018-04-16 | 2018-10-26 | 广东创达自动化装备有限公司 | The on-line automatic error correction method of knitted jacquard machine absolute value encoder and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115196529A (en) * | 2022-07-06 | 2022-10-18 | 广东奥科伟业科技发展有限公司 | Electronic limiting protection method for clothes airing machine |
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