CN206161591U - Steel sheet surface defect detection device - Google Patents
Steel sheet surface defect detection device Download PDFInfo
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- CN206161591U CN206161591U CN201621194427.0U CN201621194427U CN206161591U CN 206161591 U CN206161591 U CN 206161591U CN 201621194427 U CN201621194427 U CN 201621194427U CN 206161591 U CN206161591 U CN 206161591U
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- defect
- steel plate
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- hall element
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Abstract
The utility model discloses a steel sheet surface defect detection device, its characterized in that: constitute by signal generator (1), power amplifier (2), yoke (3), copper coil (4), infrared camera (5), hall element (6), operational amplifier (7), adc (8), computer (10), signal generator (1) produces a sinusoidal signal, enlarge the back through power amplifier (2), the signal can produce magnetic field distribution in the space behind copper coil (4), the defect on steel sheet (11) nearly surface can make the magnetic line of force (12) spill over, and near the induced eddy current density of defect department is great, can produce great response heat, hall element (6) can detect the magnetic line of force (12) of revealing, the detected signal conveys to computer (10) through adc after operational amplifier (7) amplifies, infrared camera (5) will take the photograph infrared image convey to computer (10), the utility model discloses detect the defect with two kinds of devices of hall element and infrared camera, improved the detection precision of defect position, can be applied to in all kinds of actual engineerings.
Description
Technical field
A kind of Surface Defects in Steel Plate detection means, belongs to electromagnetic nondestructive field.
Background technology
Existing steel plate species is various, and many steel plates are for manufacturing bridge, ship, boiler, pressure vessel, pressure pipeline
Important materials, and because in the presence of the composite factors such as extraneous some poisonous, high humidity, high temperature, high pressure, stress, steel plate is easy
It is cracking, the phenomenon such as be corroded.These phenomenons are the major security risks of most equipment, if do not found early, will be to people
The security of the lives and property of the people masses causes heavy losses.
Existing Magnetic Flux Leakage Inspecting technology is to pick up the magnetic leakage signal near defect to judge defect by magnetic induction sensor
Exist, conventional Magnetic Sensor has detection coil, Hall element, giant magnetoresistance element etc., and Magnetic Flux Leakage Inspecting technology has many excellent
Point, for example, the initial quantization that easily realize automation, has higher reliability, defect can be realized, for wall thickness 30mm with
Interior pipeline can simultaneously detect inside and outside wall defect, environment friendly and pollution-free etc..
Many technologies are intersected, and are the new directions of Magnetic Flux Leakage Inspecting technology development, are conducive to improving detection efficiency and automation.This
Utility model not only allows for the stray field of defect, while the fuel factor of inductive loop near defect is have also contemplated that, by infrared
The image that camera is taken the photograph can substantially judge the position of defect, then further be detected by Hall element, it is possible to achieve lack
Sunken position is accurately positioned.
The content of the invention
The purpose of this utility model is to provide a kind of Surface Defects in Steel Plate detection means.Can be to the defect of surface of steel plate
Position is accurately positioned.
The utility model is achieved through the following technical solutions：
A kind of Surface Defects in Steel Plate detection means, it is characterised in that：By signal generator (1), power amplifier (2), magnetic
Yoke (3), copper coil (4), infrared camera (5), Hall element (6), operational amplifier (7), analog-digital converter (8), computer
(10) constitute；Signal generator (1) produces a sinusoidal signal, and after power amplifier (2) amplifies, signal is through copper coil
(4) Distribution of Magnetic Field can be produced in space after, the defect of steel plate (11) near surface overflows can the magnetic line of force (12), and near defect
The inductive loop density at place is larger, can produce larger sensing heat, and Hall element (6) is able to detect that the magnetic line of force of leakage
(12), detection signal is sent to computer (10), infrared camera after operational amplifier (7) amplification through analog-digital converter
(5) infrared image taken the photograph is sent into computer (10).
A kind of described Surface Defects in Steel Plate detection means, it is characterised in that：The brass wire diameter of copper coil is 0.1-1mm.
A kind of described Surface Defects in Steel Plate detection means, it is characterised in that：The amplitude size of exciting current is 0.1-1A,
Driving frequency is 10Hz-50KHz.
A kind of described Surface Defects in Steel Plate detection means, it is characterised in that：Infrared camera (5) can be first used to infer defect
Approximate location, then defect exact position is determined by Hall element (6).
A kind of described Surface Defects in Steel Plate detection means, it is characterised in that：Detection data is eventually through computer (10)
It is analyzed process.
A kind of described Surface Defects in Steel Plate detection means, it is characterised in that：The material of yoke (3) is manganese-zinc ferrite.
Operation principle of the present utility model is：The pumping signal Jing power amplifier (2) that signal generator (1) is produced amplifies
It is loaded into afterwards on the copper coil of yoke (3) (4), according to Faraday's electromagnetic induction law, space can produce alternating magnetic field.By yoke
(3) when being placed on tested steel plate (11), the closure magnetic line of force (9) loop is constituted between yoke (3), air, steel plate (11),
The magnetic line of force (9) is propagated by magnetic resistance minimum principle.When steel plate (11) surface has discontinuous defect, the magnetic line of force (9) can bypass scarce
Fall into, pass through near defect, in the short time, the region occurs magnetic saturation, causes some magnetic lines of force (12) not spill over steel plate
(11) surface, simultaneously as the inductive loop density in magnetic saturation region is larger, the region can produce of a relatively high induction heat
Amount, the image taken the photograph by infrared camera (5) can substantially infer defective locations, and Hall element (6) is further according to infrared camera (5)
Testing result may further determine that defect position be located.
The beneficial effects of the utility model are：A kind of Surface Defects in Steel Plate detection means is by infrared camera and Hall
Two kinds of detection means of element can be accurately positioned to crack position.
Description of the drawings
Fig. 1 is a kind of Surface Defects in Steel Plate detection means figure of the present utility model；
Fig. 2 is Hall element testing result schematic diagram of the present utility model；
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment is further described to the utility model：
Referring to accompanying drawing 1, a kind of Surface Defects in Steel Plate detection means, it is characterised in that：Put by signal generator (1), power
Big device (2), yoke (3), copper coil (4), infrared camera (5), Hall element (6), operational amplifier (7), analog-digital converter
(8), computer (10) composition；Signal generator (1) produces a sinusoidal signal, after power amplifier (2) amplifies, signal
Distribution of Magnetic Field can be produced in space after copper coil (4), the defect of steel plate (11) near surface overflows can the magnetic line of force (12), and
And the inductive loop density of defect vicinity is larger, larger sensing heat can be produced, Hall element (6) is able to detect that leakage
The magnetic line of force (12), detection signal through operational amplifier (7) amplification after be sent to computer (10) through analog-digital converter, it is red
The infrared image taken the photograph is sent to computer (10) by outer camera (5).
Fig. 2 is Hall element testing result schematic diagram.
Claims (6)
1. a kind of Surface Defects in Steel Plate detection means, it is characterised in that：By signal generator (1), power amplifier (2), yoke
(3), copper coil (4), infrared camera (5), Hall element (6), operational amplifier (7), analog-digital converter (8), computer (10)
Composition；Signal generator (1) produces a sinusoidal signal, and after power amplifier (2) amplifies, signal is through copper coil (4)
After can produce Distribution of Magnetic Field in space, the defect of steel plate (11) near surface overflows can the magnetic line of force (12), and defect vicinity
Inductive loop density it is larger, larger sensing heat can be produced, Hall element (6) is able to detect that the magnetic line of force of leakage
(12), detection signal is sent to computer (10), infrared camera after operational amplifier (7) amplification through analog-digital converter
(5) infrared image taken the photograph is sent into computer (10).
2. a kind of Surface Defects in Steel Plate detection means according to claim 1, it is characterised in that：The brass wire diameter of copper coil
For 0.1-1mm.
3. a kind of Surface Defects in Steel Plate detection means according to claim 1, it is characterised in that：The amplitude of exciting current is big
It is little for 0.1-1A, driving frequency is 10Hz-50KHz.
4. a kind of Surface Defects in Steel Plate detection means according to claim 1, it is characterised in that：Infrared camera can first be used
(5) infer defect approximate location, then defect exact position is determined by Hall element (6).
5. a kind of Surface Defects in Steel Plate detection means according to claim 1, it is characterised in that：Detection data eventually through
Computer (10) is analyzed process.
6. a kind of Surface Defects in Steel Plate detection means according to claim 1, it is characterised in that：The material of yoke (3) is
Manganese-zinc ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621194427.0U CN206161591U (en) | 2016-11-02 | 2016-11-02 | Steel sheet surface defect detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621194427.0U CN206161591U (en) | 2016-11-02 | 2016-11-02 | Steel sheet surface defect detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206161591U true CN206161591U (en) | 2017-05-10 |
Family
ID=58657877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621194427.0U Active CN206161591U (en) | 2016-11-02 | 2016-11-02 | Steel sheet surface defect detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206161591U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404900A (en) * | 2016-11-02 | 2017-02-15 | 中国计量大学 | Device for detecting steel plate surface defect |
| TWI663395B (en) * | 2018-11-02 | 2019-06-21 | 中國鋼鐵股份有限公司 | Steel strip crease detection method |
-
2016
- 2016-11-02 CN CN201621194427.0U patent/CN206161591U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404900A (en) * | 2016-11-02 | 2017-02-15 | 中国计量大学 | Device for detecting steel plate surface defect |
| TWI663395B (en) * | 2018-11-02 | 2019-06-21 | 中國鋼鐵股份有限公司 | Steel strip crease detection method |
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