CN203572802U - Barkhausen grinding burn detecting device based on temperature compensation - Google Patents
Barkhausen grinding burn detecting device based on temperature compensation Download PDFInfo
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- CN203572802U CN203572802U CN201320811328.2U CN201320811328U CN203572802U CN 203572802 U CN203572802 U CN 203572802U CN 201320811328 U CN201320811328 U CN 201320811328U CN 203572802 U CN203572802 U CN 203572802U
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Abstract
The utility model relates to a Barkhausen grinding burn detecting device based on temperature compensation and belongs to the technical field of burn detection for a ferromagnetic material workpiece. The utility model aims to solve the problem of the present Barkhausen burn detecting device for a ferromagnetic material that a measuring result is incorrect under the influence of environment temperature. An output end of a sine driving signal of a sine-wave generator of the detecting device is connected with an input end of a driving signal of a power amplifier; an amplifying signal outputted by the power amplifier is used as the driving signal for a first Barkhausen noise sensor and a second Barkhausen noise sensor; noise signals outputted by the Barkhausen noise sensors pass through a pre-amplifier, a band-pass filter and a main amplifier and then are inputted to a detector. The Barkhausen grinding burn detecting device based on temperature compensation is applied to the grinding burn detection for the ferromagnetic material workpiece.
Description
Technical field
The utility model relates to the Barkhausen's grinding burn pick-up unit based on temperature compensation, belongs to the burn detection technique field of ferromagnetic material workpiece.
Background technology
Grinding burn is a kind of surface imperfection that ferromagnetic material workpiece grinding process often occurs, has a strong impact on workpiece usability and life-span.Burn detects last ring as the processing of ferromagnetic material workpiece, utilize multiple detection method and means identified surface Burn defect.By the rejecting part of burning, avoid rejected part to flow into assembling link, to guarantee precision workpiece quality.The burn detection method such as the current conventional acid-hatching of young eggs, metallographic structure analysis method and means, belong to destructive and detect, and can only be applicable to sampling Detection.But when ferromagnetic material workpiece burn is all detected, need to guarantee performance, precision and the life-span of accurate ferromagnetic material workpiece.
Barkhausen (The Barkhausen effect) was found, by research for many years, to develop into now a Dynamic Non-Destruction Measurement first in 1919.Dynamic Non-Destruction Measurement based on this effect is the variation that has caused magnetic signal (Magnetic Barkhausen noise, abbreviation MBN) that utilizes the abnormal or defect of material internal structure, carrys out decision structure extremely and the extent of injury of defect.This technology is mainly used in evaluating quality and the fatigue conditions of ferromagnetic material, have harmless, quantitative, standardization, reliably, fast and automatically, objective, penetrable coating, can carry out the advantages such as large area detection, and environmental protection, to not injury of human body, in industries such as machine-building, metallurgy, building, aeronautics and space, nuclear energy, traffic, and the field such as geologic prospecting, safety detection, material science has significant application value, therefore the research of the Dynamic Non-Destruction Measurement based on barkhausen has in recent years become domestic and international researchist's the focus of attention.
Barkhausen's detection technique is the effective ways that grinding burn detects tool potentiality, but the shortcoming of Barkhausen noise sensor maximum is exactly temperature variation can produce considerable influence to its measurement result, general ferromagnetic material magnetization property variation with temperature coefficient is not constant, the gradient direction of the model of it and material, externally-applied magnetic field intensity and temperature, as heated up or lowering the temperature relevant, therefore effective temperature compensation measure must be taked, normal operation of sensor could be allowed.In intensification and temperature-fall period, within the scope of identical transformation temperature, the direction of temperature variation is different, and magnetization variation with temperature curve is also different, and difference is very large.By temperature compensation curve, compensate the temperature influence curve that not only needs to test every kind of ferromagnetic material, workload is very big, and because temperature influence curve in heating and cooling process is different, curve is all unreasonable by way of compensation to make to choose any curve, and therefore the effect of compensation is very limited.
Summary of the invention
The utility model object is to burn pick-up unit due to influenced by ambient temperature in order to solve the Barkhausen of existing ferromagnetic material, makes the inaccurate problem of measurement result, and a kind of Barkhausen's grinding burn pick-up unit based on temperature compensation is provided.
Barkhausen's grinding burn pick-up unit based on temperature compensation described in the utility model, it comprises the first Barkhausen noise sensor, the first prime amplifier, the first bandpass filter, the first main amplifier, first detector, power amplifier, sine-wave generator, the second Barkhausen noise sensor, the second prime amplifier, the second bandpass filter, the second main amplifier and second detector
The sinusoidal drive signals output terminal of sine-wave generator connects the driving signal input of power amplifier, and the amplifying signal of power amplifier output is as the driving signal of the first Barkhausen noise sensor and the second Barkhausen noise sensor;
The first Barkhausen noise sensor is for the walkaway of ferromagnetic material workpiece to be measured, the noise signal output terminal of the first Barkhausen noise sensor connects the noise signal input end of the first prime amplifier, the noise signal output terminal of the first prime amplifier connects the filtering signal input end of the first bandpass filter, the filtering signal output terminal of the first bandpass filter connects the noise signal input end of the first main amplifier, and the noise signal output terminal of the first main amplifier connects the Noise Acquisition signal input part of first detector;
The second Barkhausen noise sensor is for the walkaway of standard ferromagnetic material workpiece, the workpiece that this standard ferromagnetic material workpiece and ferromagnetic material workpiece to be measured are same type, the noise signal output terminal of the second Barkhausen noise sensor connects the noise signal input end of the second prime amplifier, the noise signal output terminal of the second prime amplifier connects the filtering signal input end of the second bandpass filter, the filtering signal output terminal of the second bandpass filter connects the noise signal input end of the second main amplifier, the noise signal output terminal of the second main amplifier connects the Noise Acquisition signal input part of second detector.
Described the first Barkhausen noise sensor and the second Barkhausen noise sensor are comprised of work type skeleton, magnetic test coil, U-shaped skeleton, drive coil and bar magnet respectively;
Work type skeleton is comprised of upper anchor ring, lower anchor ring and cylinder, cylinder is connected between anchor ring and lower anchor ring, the axis coinciding of upper anchor ring, lower anchor ring and cylinder, and internal diameter is identical, bar magnet embeds in the hollow structure forming at upper anchor ring, lower anchor ring and cylinder, on the cylinder outer surface of work type skeleton, is wound around magnetic test coil; On the horizontal segment of U-shaped skeleton, be wound around drive coil, work type skeleton is arranged in the open side of U-shaped skeleton, and places between two parties, and the cylinder of work type skeleton is axially perpendicular to the horizontal segment place plane of U-shaped skeleton;
The driving signal of two Barkhausen noise sensors is the driving signal of drive coil, and the noise signal output terminal of two Barkhausen noise sensors is the output terminal of magnetic test coil.
Advantage of the present utility model: adopt two identical Barkhausen noise sensors of structure and parameter to detect respectively the Burn defect of to be measured and standard component in the utility model, impact due to temperature variation, when temperature conditions is severe, the noise signal of the standard specimen that the second Barkhausen noise sensor collects will change, can realize thus the compensation of the noise signal that the first Barkhausen noise sensor is gathered, the second Barkhausen noise sensor is equivalent to only be acted upon by temperature changes thus, cause the difference of Output rusults, by the comparison of two oscillograph Output rusults, can carry out effective temperature compensation.The utility model can guarantee under rugged surrounding temperature, the accuracy of walkaway result.
The utility model can be realized the contactless harmless continuous detecting of ferromagnetic material workpiece, can, in temperature environment jumpy, detect accurately the noise signal of ferromagnetic material inside workpiece.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the Barkhausen's grinding burn pick-up unit based on temperature compensation described in the utility model;
Fig. 2 is the structural representation of Barkhausen noise sensor.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, Barkhausen's grinding burn pick-up unit based on temperature compensation described in present embodiment, it comprises the first Barkhausen noise sensor 1, the first prime amplifier 2, the first bandpass filter 3, the first main amplifier 4, first detector 5, power amplifier 6, sine-wave generator 7, the second Barkhausen noise sensor 8, the second prime amplifier 9, the second bandpass filter 10, the second main amplifier 11 and second detector 12
The sinusoidal drive signals output terminal of sine-wave generator 7 connects the driving signal input of power amplifier 6, and the amplifying signal of power amplifier 6 outputs is as the driving signal of the first Barkhausen noise sensor 1 and the second Barkhausen noise sensor 8;
The first Barkhausen noise sensor 1 is for the walkaway of ferromagnetic material workpiece to be measured, the noise signal output terminal of the first Barkhausen noise sensor 1 connects the noise signal input end of the first prime amplifier 2, the noise signal output terminal of the first prime amplifier 2 connects the filtering signal input end of the first bandpass filter 3, the filtering signal output terminal of the first bandpass filter 3 connects the noise signal input end of the first main amplifier 4, and the noise signal output terminal of the first main amplifier 4 connects the Noise Acquisition signal input part of first detector 5;
The second Barkhausen noise sensor 8 is for the walkaway of standard ferromagnetic material workpiece, the workpiece that this standard ferromagnetic material workpiece and ferromagnetic material workpiece to be measured are same type, the noise signal output terminal of the second Barkhausen noise sensor 8 connects the noise signal input end of the second prime amplifier 9, the noise signal output terminal of the second prime amplifier 9 connects the filtering signal input end of the second bandpass filter 10, the filtering signal output terminal of the second bandpass filter 10 connects the noise signal input end of the second main amplifier 11, the noise signal output terminal of the second main amplifier 11 connects the Noise Acquisition signal input part of second detector 12.
Present embodiment Plays ferromagnetic material workpiece refers to be determined as at normal temperatures the workpiece without Burn defect.First the sine wave signal that sine-wave generator 7 produces amplifies through power amplifier 6, then encourages two Barkhausen noise sensors to start working.The signal of Barkhausen noise sensor output is owing to being feeble signal and bandwidth, after therefore large, the bandpass filtering frequency-selecting of premenstrual storing and main amplifier amplify, then carries out detection.First detector 5 is last, and what obtain is workpiece for measurement and Barkhausen noise signal grinding burn and temperature correlation, the Barkhausen noise signal that second detector 12 obtains is only relevant to temperature variation, can realize as calculated thus the compensation of the noise signal that workpiece for measurement temperature influence is obtained.
Embodiment two: present embodiment is described below in conjunction with Fig. 2, present embodiment is described further embodiment one, described in present embodiment, the first Barkhausen noise sensor 1 and the second Barkhausen noise sensor 8 are comprised of work type skeleton 1-1, magnetic test coil 1-2, U-shaped skeleton 1-3, drive coil 1-4 and two bar magnet 1-5 respectively
Work type skeleton 1-1 is comprised of upper anchor ring, lower anchor ring and cylinder, cylinder is connected between anchor ring and lower anchor ring, the axis coinciding of upper anchor ring, lower anchor ring and cylinder, and internal diameter is identical, bar magnet 1-5 embeds in the hollow structure forming at upper anchor ring, lower anchor ring and cylinder, on the cylinder outer surface of work type skeleton 1-1, is wound around magnetic test coil 1-2; On the horizontal segment of U-shaped skeleton 1-3, be wound around drive coil 1-4, work type skeleton 1-1 is arranged in the open side of U-shaped skeleton 1-3, and places between two parties, and the cylinder of work type skeleton 1-1 is axially perpendicular to the horizontal segment place plane of U-shaped skeleton 1-3;
The driving signal of two Barkhausen noise sensors is the driving signal of drive coil 1-4, and the noise signal output terminal of two Barkhausen noise sensors is the output terminal of magnetic test coil 1-2.
In present embodiment, bar magnet 1-5 and U-shaped skeleton 1-3 adopt ZnMn oxysome to make, and bar magnet 1-5 is embedded in work type skeleton 1-1, and work type skeleton 1-1 is fixed on the center of U-shaped skeleton 1-3.
Claims (2)
1. the Barkhausen's grinding burn pick-up unit based on temperature compensation, it is characterized in that, it comprises the first Barkhausen noise sensor (1), the first prime amplifier (2), the first bandpass filter (3), the first main amplifier (4), first detector (5), power amplifier (6), sine-wave generator (7), the second Barkhausen noise sensor (8), the second prime amplifier (9), the second bandpass filter (10), the second main amplifier (11) and second detector (12)
The sinusoidal drive signals output terminal of sine-wave generator (7) connects the driving signal input of power amplifier (6), and the amplifying signal of power amplifier (6) output is as the driving signal of the first Barkhausen noise sensor (1) and the second Barkhausen noise sensor (8);
The first Barkhausen noise sensor (1) is for the walkaway of ferromagnetic material workpiece to be measured, the noise signal output terminal of the first Barkhausen noise sensor (1) connects the noise signal input end of the first prime amplifier (2), the noise signal output terminal of the first prime amplifier (2) connects the filtering signal input end of the first bandpass filter (3), the filtering signal output terminal of the first bandpass filter (3) connects the noise signal input end of the first main amplifier (4), the noise signal output terminal of the first main amplifier (4) connects the Noise Acquisition signal input part of first detector (5),
The second Barkhausen noise sensor (8) is for the walkaway of standard ferromagnetic material workpiece, the workpiece that this standard ferromagnetic material workpiece and ferromagnetic material workpiece to be measured are same type, the noise signal output terminal of the second Barkhausen noise sensor (8) connects the noise signal input end of the second prime amplifier (9), the noise signal output terminal of the second prime amplifier (9) connects the filtering signal input end of the second bandpass filter (10), the filtering signal output terminal of the second bandpass filter (10) connects the noise signal input end of the second main amplifier (11), the noise signal output terminal of the second main amplifier (11) connects the Noise Acquisition signal input part of second detector (12).
2. the Barkhausen's grinding burn pick-up unit based on temperature compensation according to claim 1, it is characterized in that, described the first Barkhausen noise sensor (1) and the second Barkhausen noise sensor (8) are comprised of work type skeleton (1-1), magnetic test coil (1-2), U-shaped skeleton (1-3), drive coil (1-4) and bar magnet (1-5) respectively;
Work type skeleton (1-1) is comprised of upper anchor ring, lower anchor ring and cylinder, cylinder is connected between anchor ring and lower anchor ring, the axis coinciding of upper anchor ring, lower anchor ring and cylinder, and internal diameter is identical, bar magnet (1-5) embeds in the hollow structure forming at upper anchor ring, lower anchor ring and cylinder, is wound around magnetic test coil (1-2) on the cylinder outer surface of work type skeleton (1-1); On the horizontal segment of U-shaped skeleton (1-3), be wound around drive coil (1-4), work type skeleton (1-1) is arranged in the open side of U-shaped skeleton (1-3), and place between two parties, the cylinder of work type skeleton (1-1) is axially perpendicular to the horizontal segment place plane of U-shaped skeleton (1-3);
The driving signal of two Barkhausen noise sensors is the driving signal of drive coil (1-4), and the noise signal output terminal of two Barkhausen noise sensors is the output terminal of magnetic test coil (1-2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320811328.2U CN203572802U (en) | 2013-12-10 | 2013-12-10 | Barkhausen grinding burn detecting device based on temperature compensation |
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| CN201320811328.2U CN203572802U (en) | 2013-12-10 | 2013-12-10 | Barkhausen grinding burn detecting device based on temperature compensation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866236A (en) * | 2016-03-26 | 2016-08-17 | 北京工业大学 | Bevel gear tooth surface grinding burn automatic detection apparatus and detection method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866236A (en) * | 2016-03-26 | 2016-08-17 | 北京工业大学 | Bevel gear tooth surface grinding burn automatic detection apparatus and detection method thereof |
| CN105866236B (en) * | 2016-03-26 | 2018-11-13 | 北京工业大学 | Tooth surfaces of bevel gears grinding burn automatic detection device and detection method |
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