CN105527978B - lift-off value control device and control method - Google Patents

lift-off value control device and control method Download PDF

Info

Publication number
CN105527978B
CN105527978B CN201410514120.3A CN201410514120A CN105527978B CN 105527978 B CN105527978 B CN 105527978B CN 201410514120 A CN201410514120 A CN 201410514120A CN 105527978 B CN105527978 B CN 105527978B
Authority
CN
China
Prior art keywords
value
lift
control
guide rail
magnetic sensitive
Prior art date
Application number
CN201410514120.3A
Other languages
Chinese (zh)
Other versions
CN105527978A (en
Inventor
石桂芬
吴首民
何永辉
梁爽
杨水山
彭铁根
宗德祥
Original Assignee
宝山钢铁股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 宝山钢铁股份有限公司 filed Critical 宝山钢铁股份有限公司
Priority to CN201410514120.3A priority Critical patent/CN105527978B/en
Publication of CN105527978A publication Critical patent/CN105527978A/en
Application granted granted Critical
Publication of CN105527978B publication Critical patent/CN105527978B/en

Links

Abstract

The present invention provides a kind of lift-off value control device, comprising: the front end of tested strip is arranged in guide rail;Magnetic sensitive probe, is arranged on guide rail, and the driving by driving motor to guide rail, magnetic sensitive probe can move on guide rail;Laser range finder is mounted on magnetic sensitive probe, for measuring magnetic sensitive probe at a distance from tested strip;Edge wave detector is arranged in above the edge of tested strip;Computing device, computing device include lift-off value computing unit and control decision unit interconnected;Motor drive controller, is connected to computing device, and motor drive controller receives the control signal that control decision unit is exported according to the lift-off value of calculating and drives driving motor according to the control signal.The present invention also provides a kind of methods of lift-off value control.Realize the control to lift-off value.

Description

Lift-off value control device and control method

Technical field

The present invention relates to a kind of lift-off value control device and control methods.

Background technique

Strip internal flaw is one of prevailing quality defect of thin strip cold product, especially for DI material and battery steel etc. The belt steel product of specific use.In this kind of belt steel product, if there is internal flaw, it will lead to the risks such as leakage, to downstream factory Family causes very big quality dispute, brings many unnecessary troubles.Therefore in certain cold rolled strip steel production lines, production process Internal soundness defect situation must be examined, prevents from faulty goods delivering user.Due to cold-rolled steel strip products production be high speed and Automation process, there are sampling risks for product offline inspection.

The method for checking internal flaw is the methods of detection such as leakage method and electromagnetic acoustic method.In these methods, sensor Mostly use electromagnetic coil, Hall element or magneto sensor.In defect inspection process, it is required to multiple sensors and constitutes electromagnetism Detection probe realizes Inner Defect Testing.In order to guarantee detection accuracy, and it is directed to the strip of different materials, electromagnetic detection probe It needs to carry out detection work with fixed lift-off value (the distance between detection probe and detected strip).

Therefore, this just needs to be monitored lift-off value using lift-off value control device, and according to different situations, will mention It is set as different size of value from value.Lift-off value control device monitors detection probe in real time, if discovery lift-off value is discontented Foot requires, then will drive detection probe movement, so that sensor is returned to normal position, lift-off value returns to normal value.

Patent CN103562714A describes a magnetic characteristic detection method and device.Its main method is, true in advance The relationship between lift-off value and this people's component output signal is set, and using the relational implementation to the school of magneto sensor output valve Just.In this way, even if in the case where lift-off value changes, can according to lift-off value situation of change, according to both relationship, it is right Output signal is corrected, and can accurately measure the magnetic sensitive characteristic of testee.But the patent is not directed to lift-off value control Make the content of aspect.

Patent JP2002194099 describes a defect detecting device, which can accurately detect in a region Very small defect.Magneto-dependent sensor is responsible for for magnetic leakage signal being converted into electric signal, and signal is sent to signal processing apparatus, and Region division is carried out to detection object, each detection zone has a similar size.Static value counting circuit will be every The RMS in a region is calculated, and when the value of RMS has exceeded threshold value, illustrates that this is exactly defect.

Magnetic Flux Leakage Inspecting equipment in the application, due to test object material and thickness change, certainly will cause detection accuracy to change; So that detection lift-off value is become larger or is become smaller due to perhaps object under test surface is there are side wave etc. vibration, will affect detection Precision, or even sensor can be made, which to knock strip, causes sensor impaired.These variations, can certainly will all influence the normal work of detection device Make.But in the prior art, control equipment and the control method to lift-off value are not directed to.

Summary of the invention

The present invention provides a kind of lift-off value control device and control method, can assist in view of vacancy in the prior art It realizes and lift-off value control is carried out to magnetic sensitive probe, be in its lift-off value in normal range of operation in real time.

The present invention relates to a kind of lift-off value control devices, comprising:

Guide rail, is arranged in the front end of tested strip, and the guide rail is driven by driving motor;

Magnetic sensitive probe, the magnetic sensitive probe are arranged on the guide rail, the drive by the driving motor to the guide rail Dynamic, the magnetic sensitive probe can move on the guide rail;

Laser range finder is mounted on the magnetic sensitive probe, for measuring magnetic sensitive probe at a distance from tested strip;

Edge wave detector is arranged in above the edge of tested strip;

Computing device, the computing device include lift-off value computing unit and control decision unit interconnected, institute State lift-off value computing unit be connected to the laser range finder by receive the detection data from the laser range finder and based on After calculating lift-off value, the lift-off value of calculating is sent to control decision unit, the decision package is connected to institute's deckle wave survey meter;

Motor drive controller, is connected to the computing device, and the motor drive controller receives the control and determines Control signal that plan unit is exported according to the lift-off value of the calculating simultaneously drives the driving motor according to the control signal.

Preferably, further include parameter input unit, connect with the computing device, for the parameter of tested strip is defeated Enter the lift-off value computing unit.

The invention further relates to a kind of lift-off value control methods based on above-mentioned lift-off value control device, including following step It is rapid:

When there is attachment on the shake of tested strip, vibration or surface, distance change that the laser range finder will test Value is sent to lift-off value computing unit;

Lift-off value computing unit calculates the first lift-off value according to the distance change value;

The lift-off value computing unit exports the first lift-off value to control decision unit, and control decision unit generates first Control command;

First control command is sent to motor drive controller by control decision unit;

Motor drive controller controls driving motor according to first control command, to drive magnetic sensitive probe to exist It is moved on guide rail.

Preferably, further comprising the steps of:

If side wave survey meter detects strip edge wave, the wave information when wave survey meter will test is sent to control Decision package processed;

Control decision unit generates the second control command;

Second control command is sent to motor drive controller by control decision unit;

Motor drive controller controls driving motor according to second control command, to drive magnetic sensitive probe to exist Movement on guide rail.

Preferably, further comprising the steps of:

Whenever replacing tested strip, the lift-off value of the parameter input computing device of the tested strip after replacement is calculated single Member;

Lift-off value computing unit calculates initial lift-off value according to the parameter;

The lift-off value computing unit exports the initial lift-off value of calculating to control decision unit, control decision unit root Initial control command is generated according to lift-off value;

Initial control command is sent to motor drive controller by control decision unit;

Motor drive controller controls driving motor according to initial control command, drives magnetic sensitive probe on guide rail Movement.

Specifically, the calculation method of the initial lift-off value are as follows:

Being marked with quasi- lift-off value is D, shares the band to be measured of n kind material, lift-off value τi(i=1,2 ..., n),

Its lift-off value after calculating: di=D* τi(i=1,2,3 ..., n).

Using lift-off value control device of the invention and control method, when on-line checking may be implemented, band steel material is judged Cause under lift-off value situation of change and detect strip there are in the wave situation of side in the case of changing, in strip shake etc., fastly Speed calculates the size that lift-off value needs to adjust, and adjusts the position of magnetic sensitive probe in time, so that it is detected lift-off value satisfaction detection and wants It asks, avoiding strip from knocking detection probe or detection accuracy reduces.Guarantee that magnetosensitive detection sensor is in normal lift-off always Be worth work, not will cause sensor break or detection accuracy decline, ensure that detection accuracy, to reach product quality to be measured It is able to the purpose guaranteed, compensates for the deficiencies in the prior art.

Detailed description of the invention

Fig. 1 is lift-off value controling device structure diagram in embodiment;

Fig. 2 is the logic diagram of lift-off value control method in embodiment.

Specific embodiment

Description of specific embodiments of the present invention for following connection with figures.

Fig. 1 is lift-off value controling device structure diagram in embodiment.As shown in Figure 1, being moved in the present embodiment in strip On direction, the front end of tested strip 5 is equipped with guide rail 1, which is driven by driving motor 2, in the present embodiment, motor control Device processed, i.e. servo motor control driving motor 2, and guide rail 1 is provided with magnetic sensitive probe 3 and magnetizing assembly 4.Servo motor The lead screw of driving guide rail 1 drives magnetic sensitive probe 3 to move on guide rail 1.Magnetic sensitive probe 3 and the quilt batched on strip measurement roller 6 There is a certain distance, which is lift-off value between measuring tape steel 5.

Laser range finder 7 is provided on magnetic sensitive probe 3, for measuring the distance between magnetic sensitive probe 3 and tested strip 5 Variation.Laser range finder 7 is connect with computing system, will be in measured data input computing system.

Side wave survey meter 8 is provided with above tested strip 5, for detecting tested strip 5 with the presence or absence of side wave, side wave is visited Instrument 8 is surveyed to connect with computing system, it will be in measured data input computing system.

In addition, further including logistics computer in the present embodiment as parameter input unit, it is connected with computing system, for defeated Enter the parameter of tested strip 5.

Specifically, as shown in Fig. 2, computing system includes the lift-off value computing unit and control decision list interconnected Member, laser range finder 7 and logistics computer are connected with the serial ports of lift-off value computing unit, side wave survey meter 8 and control The serial ports of decision package is connected.Lift-off value computing unit is that the parameters that will be inputted calculate, and calculates lift-off value Numerical value, and input control decision package, control decision unit sends control instruction to the electric machine controller as servo motor, Servo motor directly controls driving motor 2, to realize to distance between thermosensitive probe and tested strip 5 --- it mentions Control from value.

In addition, the present embodiment also provides a kind of control method of lift-off value, it is based on above-mentioned control device, including following step It is rapid:

Logistics computer the mentioning the design parameter input computing system of tested strip 5 when replacement strip 5 every time From value computing unit, parameter includes material, the thickness etc. of tested strip 5;

Lift-off value computing unit calculates lift-off value, obtains initial lift-off value,

Being marked with quasi- lift-off value is D, shares the band to be measured of n kind material, lift-off value τi(i=1,2 ..., n), meter Initial lift-off value after calculation: di=D* τi(i=1,2,3 ..., n);

Initial lift-off value after calculating is gone out to control decision unit, control decision unit is generated according to the initial lift-off value Initial control command;

Control command is sent to servo controller by control decision unit;

Servo controller controls driving motor 2, drives movement of the magnetic sensitive probe 3 on guide rail 1.

When there is attachment on the shake of tested strip 5, vibration or surface, laser range finder 7 detects that distance change value is concurrent It is sent to lift-off value computing unit;

Lift-off value computing unit calculates the lift-off value after variation as the first lift-off value according to distance change value;

Lift-off value is exported to control decision unit, control decision unit generates the first control command;

First control command is sent to motor drive controller by control decision unit;

Servo controller controls driving motor 2, drives movement of the magnetic sensitive probe 3 on guide rail 1.So as to suitable When adjust magnetic sensitive probe 3 position.

If while wave survey meter 8 detect strip 5 there are while wave when,

Directly side wave information is exported to control decision unit, control decision unit generates the second control command;

Second control command is sent to motor drive controller by control decision unit;

Servo controller controls driving motor 2, drives movement of the magnetic sensitive probe 3 on guide rail 1.So as to suitable When adjust magnetic sensitive probe 3 position.

The lift-off value control device and control method of the present embodiment, using edge wave detector and laser range finder, to strip Status information and lift-off value size carry out real-time online monitoring, and corresponding monitoring information is then sent to computing system, calculate System obtains retransmiting signal to servo controller, servo controller is to driving motor after these information are calculated and judged It is controlled, magnetic sensitive probe movement is driven by guide rail, lift-off value is made to remain at normal value, this ensures that detection is set Standby and detection accuracy.

Claims (6)

1. a kind of lift-off value control device characterized by comprising
Guide rail, is arranged in the front end of tested strip, and the guide rail is driven by driving motor;
Magnetic sensitive probe, the magnetic sensitive probe are arranged on the guide rail, the driving by the driving motor to the guide rail, institute Stating magnetic sensitive probe can move on the guide rail;
Laser range finder is mounted on the magnetic sensitive probe, for measuring magnetic sensitive probe at a distance from tested strip;
Edge wave detector is arranged in above the edge of tested strip;
Computing device, the computing device includes lift-off value computing unit and control decision unit interconnected, described to mention It is connected to the laser range finder from value computing unit, when there is attachment on the shake of tested strip, vibration or surface, for receiving Detection data from the laser range finder and after calculating lift-off value, is sent to control decision unit for the lift-off value of calculating; The decision package is connected to institute's deckle wave survey meter;
Motor drive controller, is connected to the computing device, and the motor drive controller receives the control decision list Control signal that member is exported according to the lift-off value of the calculating simultaneously drives the driving motor according to the control signal.
2. lift-off value control device as described in claim 1, which is characterized in that it further include parameter input unit, and it is described Computing device connection, for the parameter of tested strip to be inputted the lift-off value computing unit.
3. a kind of lift-off value control method based on lift-off value control device described in claim 1, which is characterized in that including with Lower step:
When there is attachment on the shake of tested strip, vibration or surface, the distance change value that the laser range finder will test is sent out It is sent to lift-off value computing unit;
Lift-off value computing unit calculates the first lift-off value according to the distance change value;
The lift-off value computing unit exports the first lift-off value to control decision unit, and control decision unit generates the first control Order;
First control command is sent to motor drive controller by control decision unit;
Motor drive controller controls driving motor according to first control command, to drive magnetic sensitive probe in guide rail Upper movement.
4. lift-off value control method as claimed in claim 3, which is characterized in that further comprising the steps of:
If side wave survey meter detects strip edge wave, the wave information when wave survey meter will test is sent to control and determines Plan unit;
Control decision unit generates the second control command;
Second control command is sent to motor drive controller by control decision unit;
Motor drive controller controls driving motor according to second control command, to drive magnetic sensitive probe in guide rail On movement.
5. lift-off value control method as claimed in claim 3, which is characterized in that further comprising the steps of:
Whenever replacing tested strip, by the lift-off value computing unit of the parameter input computing device of the tested strip after replacement;
Lift-off value computing unit calculates initial lift-off value according to the parameter;
The lift-off value computing unit exports the initial lift-off value of calculating to control decision unit, and control decision unit is according to mentioning Initial control command is generated from value;
Initial control command is sent to motor drive controller by control decision unit;
Motor drive controller controls driving motor according to initial control command, drives shifting of the magnetic sensitive probe on guide rail It is dynamic.
6. lift-off value control method as claimed in claim 5, which is characterized in that the calculation method of the initial lift-off value are as follows:
Being marked with quasi- lift-off value is D, shares the band to be measured of n kind material, lift-off value τi(i=1,2 ..., n),
Its lift-off value after calculating: di=D* τi(i=1,2,3 ..., n).
CN201410514120.3A 2014-09-29 2014-09-29 lift-off value control device and control method CN105527978B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410514120.3A CN105527978B (en) 2014-09-29 2014-09-29 lift-off value control device and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410514120.3A CN105527978B (en) 2014-09-29 2014-09-29 lift-off value control device and control method

Publications (2)

Publication Number Publication Date
CN105527978A CN105527978A (en) 2016-04-27
CN105527978B true CN105527978B (en) 2019-01-11

Family

ID=55770260

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410514120.3A CN105527978B (en) 2014-09-29 2014-09-29 lift-off value control device and control method

Country Status (1)

Country Link
CN (1) CN105527978B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105738467B (en) * 2016-02-04 2019-04-30 天津大学 A kind of more lift-off value pipeline detection systems of Magnetic Memory and its detection method
CN106053592B (en) * 2016-06-13 2018-04-20 河海大学 Real bridge welding seam scanner and its scan method
CN106441106B (en) * 2016-08-30 2019-06-11 首钢京唐钢铁联合有限责任公司 A kind of hot-dip galvanized steel strip goes out jitter measuring apparatus and method after zinc pot

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324935A (en) * 1992-05-08 1994-06-28 Seiko Instruments Inc. Scanning probe microscope having a directional coupler and a Z-direction distance adjusting piezoelectric element
JPH08145952A (en) * 1994-11-21 1996-06-07 Nippon Steel Corp Magnetic leakage flux testing method
JP2007057245A (en) * 2005-08-22 2007-03-08 Nok Corp Device for inspecting melt-in depth of welded part
CN2903986Y (en) * 2006-05-12 2007-05-23 北京理工大学 Metal magnetic memory multi-probe tester
CN103562714A (en) * 2011-05-30 2014-02-05 杰富意钢铁株式会社 Magnetic property measurement method and magnetic property measurement device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3758439B2 (en) * 1999-12-20 2006-03-22 日本精工株式会社 Method for detecting a defect of a test object having a curved surface in a non-contact manner along the curved surface
CN1161194C (en) * 2002-01-11 2004-08-11 北京科技大学 Linearl laser detector of plate shape
CN100427947C (en) * 2006-06-16 2008-10-22 清华大学 Large-area steel plate defect flux-leakage detection method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5324935A (en) * 1992-05-08 1994-06-28 Seiko Instruments Inc. Scanning probe microscope having a directional coupler and a Z-direction distance adjusting piezoelectric element
JPH08145952A (en) * 1994-11-21 1996-06-07 Nippon Steel Corp Magnetic leakage flux testing method
JP2007057245A (en) * 2005-08-22 2007-03-08 Nok Corp Device for inspecting melt-in depth of welded part
CN2903986Y (en) * 2006-05-12 2007-05-23 北京理工大学 Metal magnetic memory multi-probe tester
CN103562714A (en) * 2011-05-30 2014-02-05 杰富意钢铁株式会社 Magnetic property measurement method and magnetic property measurement device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
漏磁法检测薄带钢内部缺陷的研究进展;石桂芬 等;《世界钢铁》;20130731(第4期);全文

Also Published As

Publication number Publication date
CN105527978A (en) 2016-04-27

Similar Documents

Publication Publication Date Title
JP2016128842A (en) Thermographic test method and test device for carrying out the same
JP4829883B2 (en) Method and apparatus for non-destructive inspection of tubes
TWI289195B (en) Method and apparatus for measuring object thickness
US8265885B2 (en) System and method for determining lifetime of wind turbine blade
KR101909768B1 (en) Surface property inspection device and surface property inspection method
US9254851B2 (en) Sensor assembly
JP2720389B2 (en) Method and apparatus for detecting intrinsic stress of component
Verl et al. Sensorless automated condition monitoring for the control of the predictive maintenance of machine tools
CN103163216B (en) A kind of metallic conductor defect recognition based on giant magnetoresistance sensor and method of estimation
CN106415261B (en) Surface characteristic check device and surface characteristic inspection method
US8536860B2 (en) Method and apparatus for non-destructive testing
RU2618767C1 (en) Device for determining the state of contact of conveyor belt platen roller
RU2545501C2 (en) Method and device for analysing vibrations and sample database therefor and use of sample database
CN203881312U (en) Device for automatically detecting thickness of plate
CN102053061B (en) Large joint surface experiment device
US7521917B2 (en) Method and apparatus for testing material integrity
US7568641B2 (en) Method and apparatus for determining wear and tear in machines
US8907243B2 (en) Maintenance system for wire transport system of wire discharge processing machine
CN202614710U (en) Energized conductor flaw detection device based on three-dimensional micrometric displacement mobile platform
CN102759567A (en) Eddy current testing recognition and evaluation method for defects of inner wall and outer wall of steel pipe under direct current magnetization
WO2015010460A1 (en) System for online monitoring metal abrasive grains in oil liquid and monitoring method therefor
WO2010050155A1 (en) Barkhausen noise inspection apparatus and inspection method
CN103323458B (en) A kind of detection device, weld inspection system and weld inspection method
CN202625292U (en) Visual detection device with conveyer
US8274280B2 (en) Device and process for nondestructive and noncontact detection of faults in a test piece

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
GR01 Patent grant