CN102688996A - Method for suppressing interference of electromagnetic braking to signal of liquid level meter - Google Patents
Method for suppressing interference of electromagnetic braking to signal of liquid level meter Download PDFInfo
- Publication number
- CN102688996A CN102688996A CN2012101953301A CN201210195330A CN102688996A CN 102688996 A CN102688996 A CN 102688996A CN 2012101953301 A CN2012101953301 A CN 2012101953301A CN 201210195330 A CN201210195330 A CN 201210195330A CN 102688996 A CN102688996 A CN 102688996A
- Authority
- CN
- China
- Prior art keywords
- liquid level
- electromagnetic braking
- signal
- current
- control system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Continuous Casting (AREA)
Abstract
The invention provides a method for suppressing the interference of electromagnetic braking to a signal of a liquid level meter. The conventional liquid level detection control system, the conventional electromagnetic braking device and control system, the conventional programmable logic controller (PLC), the conventional first-class computer and the like are utilized, a digital signal processor (DSP) chip system is added between the liquid level meter and the liquid level detection control system according to needs, a liquid level virtual height caused by the electromagnetic braking is corrected, and a corrected signal is output to the liquid level detection control system. The interference of the electromagnetic braking to the signal of the liquid level meter can be effectively suppressed, a liquid level virtual height phenomenon can be prevented, the liquid level control accuracy of a crystallizer and the stable running of electromagnetic braking equipment are ensured, a crystallizer blank shell thinning problem caused by the liquid level virtual height is solved, potential safety hazards are eliminated, and a foundation is laid for the production of high-quality steel.
Description
Technical field
The invention belongs to continuous casting process control field, relate in particular to a kind of method that disturb liquid level appearance signal in crystallizer electromagnetic braking magnetic field that is used to suppress.
Background technology
On conticaster, rationally use the crystallizer electromagnetic brake technology, can significantly improve the surface quality of steel, improve pulling rate and production efficiency.But find when using electromagnetic braking aborning; The unlatching magnetic field that electromagnetic braking produced can seriously interfere with the detection signal of mould liquid level appearance; Make the mould liquid level appearance be delivered to the detection signal distortion of tank level control system; And after the signal output of tank level control system according to distortion, certainly will cause the very big deviation of generation between mould liquid level actual value and the setting value, promptly there is " liquid level virtual height " phenomenon; Because " liquid level virtual height " causes crystallizer shell thickness attenuate, has greatly bleed-out risk.Simultaneously, also directly influenced the stable operation of electromagnetic braking equipment, even the situation that causes electromagnetic braking normally to use.
Summary of the invention
The present invention aims to provide a kind of method that can suppress electromagnetic braking magnetic field to the interference of liquid level appearance signal, thereby effectively prevents the level fluctuation in the crystallizer, guarantees the electromagnetic braking stable equipment operation, eliminates safe hidden trouble, and improves steel quality.
For this reason, the solution that the present invention taked is:
A kind of method that suppresses electromagnetic braking to the interference of liquid level appearance signal; It is characterized in that; Between liquid level appearance and tank level control system, set up Digital Signal Processing (DSP) chip system; Liquid level virtual height to electromagnetic braking causes is revised, and revised signal is exported to tank level control system, realizes mould liquid level and electromagnetic braking bistable; Its concrete grammar is:
1, in the liquid level instrument system switch board, set up a dsp chip, dispose embedded system in the chip, be furnished with the compensation program to magnetic interference in the embedded system, tank level control system is revised and exported to compensation program with the liquid level signal that collects;
2,2 output cable places in the electromagnetic braking junction box increase by 1 current sensor respectively, are used to detect electromagnetic braking and start the output current that coil and lower coil are gone up in the back, and detected current signal is transferred to the embedded system of dsp chip;
3, in the electromagnetic braking control program, set up module a and module b, the corresponding respectively two kinds of electric currents of module a and module b apply pattern: wherein module a meets current-mode in the same way, and module b meets the reversing the current pattern; Simultaneously, on the one-level picture of electromagnetic braking, increase button and reversing button in the same way, and through difference link block a of programmable logic controller (PLC) system and module b;
4, dsp chip system calibrating:
When each new crystallizer or liquid level appearance come into operation, need be through demarcating the dsp chip system that activates; Concrete scaling method is:
A, before conticaster production, be placed in the crystallizer with aluminium sheet simulation molten steel, the insertion position is apart from copper plate of crystallizer 100mm suitable for reading place;
B, select different current-modes according to the difference of electromagnetic braking winding wiring mode; When lower coil in the electromagnetic braking in the same way during wiring, selects current-mode one to open electro-magnetic braking device according to magnetic direction; When lower coil in the electromagnetic braking during, select current-mode two to open electro-magnetic braking devices according to the magnetic direction reverse wiring;
C, dsp chip system gather the level fluctuation signal under the different electric stream mode automatically, and signal is input in the database of system;
D, along with pattern is set the end of electric current, electro-magnetic braking device stops automatically, the dsp chip system acquisition finishes;
E, taking-up aluminium sheet are demarcated and are finished;
5, in normal productive process; After opening electromagnetic braking; The dsp chip system will gather liquid level signal and electromagnetic braking field signal that the liquid level appearance transmits automatically; Compensation program is revised the liquid level signal that collects and compensate according to the magnetic interference degree, and the liquid level signal after will compensating exports to tank level control system, and tank level control system is according to offset crystallization control device liquid level.
Beneficial effect of the present invention is:
Because the present invention can show and participate in the liquid level signal of control according to magnetic interference degree correction liquid level appearance; Thereby can effectively suppress the interference of electromagnetic braking to liquid level appearance signal; Prevent " liquid level virtual height " phenomenon, guaranteed the stable operation of mould liquid level control accuracy and electromagnetic braking equipment, avoided because the crystallizer shell thickness attenuate problem that " liquid level virtual height " causes; Eliminated potential safety hazard, laid a good foundation for producing high-quality steel.Simultaneously, when not opening electromagnetic braking, programming system of the present invention does not also play a role, and therefore can the tank level control system in original production not impacted.
Description of drawings
Fig. 1 applies pattern one for the electromagnetic braking electric current.
Fig. 2 applies pattern two for the electromagnetic braking electric current.
Fig. 3 is for suppressing electromagnetic braking to liquid level appearance signal EVAC structure and FB(flow block).
The specific embodiment
The present invention suppresses the method that electromagnetic braking is disturbed liquid level appearance signal; Utilize original Level Detection control system, electro-magnetic braking device and control system, PLC and one-level computer etc.; And between liquid level appearance and tank level control system, set up the dsp chip system as required; Liquid level virtual height to electromagnetic braking causes is revised, and revised signal is exported to tank level control system, realizes mould liquid level and electromagnetic braking bistable.Concrete grammar of the present invention is:
1, in the liquid level instrument system switch board, set up a dsp chip, dispose embedded system in the chip, be furnished with the compensation program to magnetic interference in the embedded system, tank level control system is revised and exported to compensation program with the liquid level signal that collects.
2,2 output cable places in the electromagnetic braking junction box increase by 1 current sensor respectively, are used to detect electromagnetic braking and start the output current that coil and lower coil are gone up in the back, and detected current signal is transferred to the embedded system of dsp chip.
3, in the electromagnetic braking control program, set up module a and module b, the corresponding respectively two kinds of electric currents of module a and module b apply pattern: wherein module a meets current-mode in the same way, and module b meets the reversing the current pattern; Simultaneously, on the one-level picture of electromagnetic braking, increase button and reversing button in the same way, and through difference link block a of PLC system and module b.
4, dsp chip system calibrating:
When each new crystallizer or liquid level appearance come into operation, need be through demarcating the dsp chip system that activates.Concrete scaling method is:
A, before conticaster production, be placed in the crystallizer with aluminium sheet simulation molten steel, the insertion position is apart from copper plate of crystallizer 100mm suitable for reading place;
B, select different current-modes according to the difference of electromagnetic braking winding wiring mode; When lower coil in the electromagnetic braking in the same way during wiring, selects current-mode one to open electro-magnetic braking device according to magnetic direction; When lower coil in the electromagnetic braking during, select current-mode two to open electro-magnetic braking devices according to the magnetic direction reverse wiring;
C, dsp chip system gather the level fluctuation signal under the different electric stream mode automatically, and signal is input in the database of system;
D, along with pattern is set the end of electric current, electro-magnetic braking device stops automatically, the dsp chip system acquisition finishes;
E, taking-up aluminium sheet are demarcated and are finished.
5, in normal productive process; After opening electromagnetic braking; The dsp chip system will gather liquid level signal and electromagnetic braking field signal that the liquid level appearance transmits automatically; Compensation program is revised the liquid level signal that collects and compensate according to the magnetic interference degree, and the liquid level signal after will compensating exports to tank level control system, and tank level control system is according to offset crystallization control device liquid level.
Claims (1)
1. one kind is suppressed the method that electromagnetic braking is disturbed liquid level appearance signal; It is characterized in that; Between liquid level appearance and tank level control system, setting up Digital Signal Processing is the dsp chip system; Liquid level virtual height to electromagnetic braking causes is revised, and revised signal is exported to tank level control system, realizes mould liquid level and electromagnetic braking bistable; Its concrete grammar is:
(1), in the liquid level instrument system switch board, set up a dsp chip, dispose embedded system in the chip, be furnished with compensation program in the embedded system to magnetic interference, tank level control system is revised and exported to compensation program with the liquid level signal that collects;
(2), 2 output cable places in the electromagnetic braking junction box increase by 1 current sensor respectively, be used to detect electromagnetic braking and start the output current that coil and lower coil are gone up in the back, and detected current signal is transferred to the embedded system of dsp chip;
(3), in the electromagnetic braking control program, set up module a and module b, the corresponding respectively two kinds of electric currents of module a and module b apply pattern: wherein module a meets current-mode in the same way, and module b meets the reversing the current pattern; Simultaneously, on the one-level picture of electromagnetic braking, increase button and reversing button in the same way, and through difference link block a of PLC system and module b;
(4), dsp chip system calibrating:
When each new crystallizer or liquid level appearance come into operation, need be through demarcating the dsp chip system that activates; Concrete scaling method is:
A, before conticaster production, be placed in the crystallizer with aluminium sheet simulation molten steel, the insertion position is apart from copper plate of crystallizer 100mm suitable for reading place;
B, select different current-modes according to the difference of electromagnetic braking winding wiring mode; When lower coil in the electromagnetic braking in the same way during wiring, selects current-mode one to open electro-magnetic braking device according to magnetic direction; When lower coil in the electromagnetic braking during, select current-mode two to open electro-magnetic braking devices according to the magnetic direction reverse wiring;
C, dsp chip system gather the level fluctuation signal under the different electric stream mode automatically, and signal is input in the database of system;
D, along with pattern is set the end of electric current, electro-magnetic braking device stops automatically, the dsp chip system acquisition finishes;
E, taking-up aluminium sheet are demarcated and are finished;
(5), in normal productive process; After opening electromagnetic braking; The dsp chip system will gather liquid level signal and electromagnetic braking field signal that the liquid level appearance transmits automatically; Compensation program is revised the liquid level signal that collects and compensate according to the magnetic interference degree, and the liquid level signal after will compensating exports to tank level control system, and tank level control system is according to offset crystallization control device liquid level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210195330 CN102688996B (en) | 2012-06-13 | 2012-06-13 | Method for suppressing interference of electromagnetic braking to signal of liquid level meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210195330 CN102688996B (en) | 2012-06-13 | 2012-06-13 | Method for suppressing interference of electromagnetic braking to signal of liquid level meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102688996A true CN102688996A (en) | 2012-09-26 |
| CN102688996B CN102688996B (en) | 2013-11-06 |
Family
ID=46854825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210195330 Active CN102688996B (en) | 2012-06-13 | 2012-06-13 | Method for suppressing interference of electromagnetic braking to signal of liquid level meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102688996B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110625078A (en) * | 2018-06-25 | 2019-12-31 | 宝山钢铁股份有限公司 | Active anti-electromagnetic stirring interference device for continuous casting crystallizer expert system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3934975A1 (en) * | 1988-10-26 | 1990-05-03 | Krupp Stahl Ag | Method and appts. to control molten metal level in continuous casting - has output signal from eddy-current liq. level sensor connected w.r.t. output of resistance level probe |
| JP2002331342A (en) * | 2001-05-02 | 2002-11-19 | Nittetsu Elex Co Ltd | Simple correction method for electromagnetic molten steel level detector |
| CN2529215Y (en) * | 2001-06-25 | 2003-01-01 | 姜虹 | Vortex molten steel liquid level measuring device |
| CN201229197Y (en) * | 2008-06-20 | 2009-04-29 | 宝山钢铁股份有限公司 | Filter arrangement for vortex flow sensor detecting system |
| CN201376079Y (en) * | 2009-03-12 | 2010-01-06 | 宝山钢铁股份有限公司 | Anti-interference power enhancing and switching device of vortex flow transducer detection system |
| CN201637459U (en) * | 2010-04-06 | 2010-11-17 | 武汉钢铁(集团)公司 | Molten steel liquid level detecting system |
| CN102354229A (en) * | 2011-07-26 | 2012-02-15 | 上海理工大学 | Liquid level fuzzy controller and working method thereof |
| CN102402229A (en) * | 2010-09-15 | 2012-04-04 | 鞍钢股份有限公司 | Continuous casting tundish liquid steel level control device and method |
-
2012
- 2012-06-13 CN CN 201210195330 patent/CN102688996B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3934975A1 (en) * | 1988-10-26 | 1990-05-03 | Krupp Stahl Ag | Method and appts. to control molten metal level in continuous casting - has output signal from eddy-current liq. level sensor connected w.r.t. output of resistance level probe |
| JP2002331342A (en) * | 2001-05-02 | 2002-11-19 | Nittetsu Elex Co Ltd | Simple correction method for electromagnetic molten steel level detector |
| CN2529215Y (en) * | 2001-06-25 | 2003-01-01 | 姜虹 | Vortex molten steel liquid level measuring device |
| CN201229197Y (en) * | 2008-06-20 | 2009-04-29 | 宝山钢铁股份有限公司 | Filter arrangement for vortex flow sensor detecting system |
| CN201376079Y (en) * | 2009-03-12 | 2010-01-06 | 宝山钢铁股份有限公司 | Anti-interference power enhancing and switching device of vortex flow transducer detection system |
| CN201637459U (en) * | 2010-04-06 | 2010-11-17 | 武汉钢铁(集团)公司 | Molten steel liquid level detecting system |
| CN102402229A (en) * | 2010-09-15 | 2012-04-04 | 鞍钢股份有限公司 | Continuous casting tundish liquid steel level control device and method |
| CN102354229A (en) * | 2011-07-26 | 2012-02-15 | 上海理工大学 | Liquid level fuzzy controller and working method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 李明伟等: "基于模糊双模控制的钢水液位控制系统实现", 《计算机工程》, vol. 32, no. 17, 30 September 2006 (2006-09-30) * |
| 金百刚等: "结晶器电磁制动技术的应用研究", 《冶金设备》, no. 1, 28 February 2011 (2011-02-28), pages 39 - 42 * |
| 陈志凌等: "结晶器液位控制系统的研究", 《冶金自动化 增刊》, 31 December 2005 (2005-12-31), pages 124 - 127 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110625078A (en) * | 2018-06-25 | 2019-12-31 | 宝山钢铁股份有限公司 | Active anti-electromagnetic stirring interference device for continuous casting crystallizer expert system |
| CN110625078B (en) * | 2018-06-25 | 2021-08-17 | 宝山钢铁股份有限公司 | Active anti-electromagnetic stirring interference device for continuous casting crystallizer expert system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102688996B (en) | 2013-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201728346U (en) | Variable-slag-line control device of slab continuous casting submerged nozzle | |
| CN103192047B (en) | Conticaster crystallizer automatic cooling water control system and control method thereof | |
| CN203484632U (en) | Fixed length optimization cutting apparatus for continuous casting tail blank | |
| CN102688996B (en) | Method for suppressing interference of electromagnetic braking to signal of liquid level meter | |
| CN103357860A (en) | Automatic control system of stopper rod with direct-drive-type motor | |
| CN204842960U (en) | Middle package immersion nozzle immersion depth is according to sign | |
| CN107824756B (en) | Steel control method more than a kind of slab caster tundish based on continuous temperature measurement | |
| CN203143955U (en) | Programmable logic controller (PLC) field bus network of portal crane with Ethernet frame | |
| CN207663246U (en) | A kind of aluminum-zinc alloy unit furnace area incudes temperature remote control apparatus | |
| CN107794475A (en) | The automatic zincification device and its application method of continuous hot galvanizing | |
| CN201333503Y (en) | Metal magnesium and magnesium alloy automatic cast ingot device | |
| CN201217067Y (en) | Electromagnetic control apparatus for flow field of continuous casting crystallizer | |
| CN202070735U (en) | Wire feeder | |
| CN203621423U (en) | Electromagnetism braking device for centralizing magnetic area in continuous casting crystallizer | |
| CN203649344U (en) | Continuous casting crystallizer with automatic alarming and slag discharging functions | |
| CN201681192U (en) | Optical cable branching unit | |
| CN205122379U (en) | Novel voltage mutual inductor | |
| CN102019414B (en) | Control method of steel cast ending | |
| CN203438775U (en) | Axle assembly | |
| CN103341620A (en) | Temperature adjusting system of condensate water in cooling pond for casting | |
| CN101337273A (en) | Pouring box stopper for continuous casting | |
| CN102825235A (en) | Continuous-casting flexible dummy bar control method without utilizing encoder | |
| CN110794882A (en) | Front box liquid level control system and use method thereof | |
| CN201307516Y (en) | Mounting structure of secondary wiring cover and wiring box of current transformer | |
| CN205183718U (en) | Aluminum alloy slab ingot electromagnetic casting crystallization device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |