CN107576722A - A kind of ferromagnetic material grinding burn detection method based on barkhausen - Google Patents
A kind of ferromagnetic material grinding burn detection method based on barkhausen Download PDFInfo
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- CN107576722A CN107576722A CN201710767189.0A CN201710767189A CN107576722A CN 107576722 A CN107576722 A CN 107576722A CN 201710767189 A CN201710767189 A CN 201710767189A CN 107576722 A CN107576722 A CN 107576722A
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- ferromagnetic material
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Abstract
The present invention relates to a kind of ferromagnetic material grinding burn detection method based on barkhausen, step 1：Selection and workpiece material to be checked and condition of heat treatment identical strip ferromagnetic material block, pass through clamping and coordinate fixation；Step 2：Ferromagnetic material block to be detected is scanned by the probe of sensor end, scanning direction is perpendicular to burn spot direction, and the direction of magnetization is parallel to burn spot direction；Step 3：The signal that microcontroller is sent after power amplifier amplifies, start working by stimulus sensor, and the signal of sensor output carries out detection again after fore-lying device amplifies again；Step 4：The noise signal that microcontroller collects sensor is analyzed and processed, and is drawn grinding burn assessment of scenario result, is shown to after assessment with image format on LCD display；The present invention is judged Burn defect rank by setting sensor to improve the sensitivity of detection sample, and the burn state of detection device is shown using image display.
Description
Technical field：
The invention belongs to technical field of nondestructive testing, and in particular to a kind of ferromagnetic material grinding based on barkhausen
Burn detection method.
Background technology：
Grinding burn is a kind of surface defect that ferromagnetic material workpiece grinding process often occurs, and has a strong impact on that workpiece uses
Performance and life-span.Last ring of burn detection as ferromagnetic material work pieces process, can utilize a variety of detection methods and means to know
Other burned work-surface defect.By rejecting part of burning, rejected part is avoided to flow into assembling link, to ensure precision workpiece
Quality.Currently conventional detection method has the acid-hatching of young eggs and metallographic structure analysis method etc., and it belongs to destructive detection, may be only available for
Sampling Detection.And whole detections for ferromagnetic material workpiece burn are, it is necessary to ensure accurate ferromagnetic material workpiece performance, precision
Carried out with the basis of the life-span.At present, the appearance of Barkhausen noise detection method solves the lossless inspection of ferromagnetic material grinding burn
The problem of survey, this method are the currently the only methods that can detect matrix burn across coating, but because Barkhausen detects
Method lacks the sensitivity test step of correlation carrying out during Barkhausen's ferromagnetic material grinding burn detection.
The content of the invention：
Have lossless, simple to operate, detection sensitivity is high to be imitated based on Barkhausen the purpose of the present invention is to propose to a kind of
The ferromagnetic material grinding burn detection method answered.
The technical solution adopted by the present invention is：A kind of ferromagnetic material grinding burn detection side based on barkhausen
Method, using following detecting step：
Step 1：Selection and workpiece material to be checked and condition of heat treatment identical strip ferromagnetic material block, are matched somebody with somebody by clamping
Close and fix；
Step 2：Ferromagnetic material block to be detected is scanned by the probe of sensor end, scanning direction is perpendicular to burning
Blemish direction, the direction of magnetization is parallel to burn spot direction；
Step 3：The signal that microcontroller is sent is after power amplifier amplifies, and stimulus sensor is started working, sensor
The signal of output carries out detection again after fore-lying device amplifies again；
Step 4：The noise signal that microcontroller collects sensor is analyzed and processed, and show that grinding burn situation is commented
Estimate result, be shown to after assessment with image format on LCD display.
Preferably, the laser displacement sensor includes magnetizer and receiver, and incoming frequency scope 0-1KHZ.
Preferably, the magnetizer uses silicon steel material, thickness 0.2mm, coiling diameter 0.21mm, enamel-covered wire 3
Layer, totally 120 circle；The receiver uses nickel-zinc-ferrite material, size 4*30mm, coiling diameter 0.12mm, 3 layers of enamel-covered wire,
Totally 300 circle.
Preferably, the microcontroller uses STM32 development boards.
The beneficial effects of the invention are as follows：By setting sensor to improve the sensitivity of detection sample, to Burn defect rank
Judged；Using stm32 technologies, make the more convenient miniaturization of detection device, low in energy consumption, cost is low, while shows using image
Show module can more convenient display device MP values distribution relation, more can effectively detect the burn state of device.
Embodiment：
The present invention is a kind of ferromagnetic material grinding burn detection method based on barkhausen, and present embodiment is got the bid
Quasi- ferromagnetic material workpiece refers to is determined as the workpiece without part defect is burnt at normal temperatures, from MCUs of the STM32 as instrument, specifically
Detecting step is as follows：
Step 1：Selection and workpiece material to be checked and condition of heat treatment identical strip ferromagnetic material block, are matched somebody with somebody by clamping
Close and fix；
Step 2：Ferromagnetic material block to be detected is scanned by the probe of Barkhausen's sensor end, scanning direction
Perpendicular to burn spot direction, the direction of magnetization is parallel to burn spot direction.
Step 3：For the signal that microcontroller is sent after power amplifier amplifies, excitation Barkhausen's sensor starts work
Make, microcontroller uses STM32 development boards；What it is due to Barkhausen's output is small-signal and bandwidth, therefore is put before menstruation
Greatly, after bandpass filtering frequency-selecting and main amplifier amplify, then detection is carried out；
Step 4：The Barkhausen noise signal being temperature dependent with grinding burn of obtained ferromagnetic material block to be detected
Pass to microcontroller to be analyzed and processed, draw grinding burn assessment of scenario result, LCD is shown to image format after assessment
On display.
Sensor includes magnetizer and receiver, because sensor magnetization needs to carry out under lowpass frequency, incoming frequency
Scope 0-1KHZ, it is adapted to choose in the material of the transmission frequency using silicon steel sheet as magnetizer material and receiver use
Nickel-zinc-ferrite material, optimal magnetizing voltage, magnetizer coil turn and the receiver coil number of turn is determined using software.Magnetization
The silicon steel material of device, thickness 0.2mm, coiling diameter 0.21mm, 3 layers of enamel-covered wire, totally 120 circle；The nickel zinc iron of receiver
Ferrite, size 4*30mm, coiling diameter 0.12mm, 3 layers of enamel-covered wire, totally 300 circle.
Because measured signal is faint, and noise jamming be present, it is therefore desirable to rational amplification and reception device, to determine
Noise that may be present, spectrum analysis can be carried out by some softwares, it is determined that existing noise jamming spectral range, selection is suitable
Filter circuit and parameter, such as MATLAB or Labview etc..Because Labview has powerful data processing function, use
Be graphical source code, can carry out more quick data processing for the circuit design of early stage.So using Labview
The collection and analysis of signal are carried out, reaches the purpose of analysis MBN signals.Due to Barkhausen noise signal and its it is faint be millivolt
Level could carry out signal transacting, it is necessary to be amplified by initial amplifier, for reduction offset voltage, offset current and temperature change
It is elegant caused by change and power-supply fluctuation, while suppression common mode signal, using three amplifier amplifying circuits.Using AD620 chips,
LM324N chips complete the amplification of signal.Multiplication factor is tentatively set to 1000 times.
Because ferromagnetic material burn can cause the change of hardness and stress, barkhausen signal shows more by force the heat waste of workpiece
Wound is bigger, therefore the information that is reflected of MBN signals is the integrated information of stress and hardness, using STM32 and Labview, leads to
Cross the general analysis method such as side such as wavelet analysis, FFT, envelope, ring number, average value, root mean square and peak value of pulse distribution
Method, study the MP value calculating methods judged burn and be determined.
The foregoing is only a preferred embodiment of the present invention, these embodiments are all based on the present invention
Different implementations under general idea, and protection scope of the present invention is not limited thereto, it is any to be familiar with the art
Technical staff the invention discloses technical scope in, the change or replacement that can readily occur in, should all cover the present invention's
Within protection domain.Therefore, protection scope of the present invention should be defined by the protection domain of claims.
Claims (4)
- A kind of 1. ferromagnetic material grinding burn detection method based on barkhausen, it is characterised in that：Using following inspection Survey step：Step 1：Selection and workpiece material to be checked and condition of heat treatment identical strip ferromagnetic material block, coordinated by clamping solid It is fixed；Step 2：Ferromagnetic material block to be detected is scanned by the probe of sensor end, scanning direction is perpendicular to burn spot Direction, the direction of magnetization is parallel to burn spot direction；Step 3：The signal that microcontroller is sent after power amplifier amplifies, start working by stimulus sensor, sensor output Signal carry out detection again after fore-lying device amplifies again；Step 4：The noise signal that microcontroller collects sensor is analyzed and processed, and draws grinding burn assessment of scenario knot Fruit, it is shown to after assessment with image format on LCD display.
- 2. a kind of ferromagnetic material grinding burn detection method based on barkhausen according to claim 1, it is special Sign is：The laser displacement sensor includes magnetizer and receiver, and incoming frequency scope 0-1KHZ.
- 3. a kind of ferromagnetic material grinding burn detection method based on barkhausen according to claim 2, it is special Sign is：The magnetizer uses silicon steel material, thickness 0.2mm, coiling diameter 0.21mm, 3 layers of enamel-covered wire, and totally 120 Circle；The receiver uses nickel-zinc-ferrite material, size 4*30mm, coiling diameter 0.12mm, 3 layers of enamel-covered wire, totally 300 circle.
- 4. a kind of ferromagnetic material grinding burn detection method based on barkhausen according to claim 2, it is special Sign is：The microcontroller uses STM32 development boards.
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| CN201710767189.0A CN107576722A (en) | 2017-08-30 | 2017-08-30 | A kind of ferromagnetic material grinding burn detection method based on barkhausen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836806A (en) * | 2019-11-29 | 2020-02-25 | 中国航发中传机械有限公司 | Magnetic-elastic grinding burn detection method for acid-corrosion-resistant steel gear |
| CN112683997A (en) * | 2020-12-15 | 2021-04-20 | 中国航发哈尔滨轴承有限公司 | Method for monitoring surface grinding quality of bearing ring by Barkhausen noise analysis method |
| CN112924536A (en) * | 2021-03-01 | 2021-06-08 | 无锡职业技术学院 | Quality control method before and after plating diamond-like layer on piston for high-pressure pump |
| CN114136778A (en) * | 2021-11-26 | 2022-03-04 | 南昌航空大学 | Aviation gear grinding burn stress detection method and device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110836806A (en) * | 2019-11-29 | 2020-02-25 | 中国航发中传机械有限公司 | Magnetic-elastic grinding burn detection method for acid-corrosion-resistant steel gear |
| CN112683997A (en) * | 2020-12-15 | 2021-04-20 | 中国航发哈尔滨轴承有限公司 | Method for monitoring surface grinding quality of bearing ring by Barkhausen noise analysis method |
| CN112924536A (en) * | 2021-03-01 | 2021-06-08 | 无锡职业技术学院 | Quality control method before and after plating diamond-like layer on piston for high-pressure pump |
| CN114136778A (en) * | 2021-11-26 | 2022-03-04 | 南昌航空大学 | Aviation gear grinding burn stress detection method and device |
| CN114136778B (en) * | 2021-11-26 | 2023-04-11 | 南昌航空大学 | Aviation gear grinding burn stress detection method and device |
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Application publication date: 20180112 |