CN206270297U - A kind of metallic conduit defect detecting device based on far-field eddy - Google Patents
A kind of metallic conduit defect detecting device based on far-field eddy Download PDFInfo
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- CN206270297U CN206270297U CN201621390171.0U CN201621390171U CN206270297U CN 206270297 U CN206270297 U CN 206270297U CN 201621390171 U CN201621390171 U CN 201621390171U CN 206270297 U CN206270297 U CN 206270297U
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Abstract
A kind of metallic conduit defect detecting device based on far-field eddy, is made up of computer, STM32 development boards, power amplifier, the first excitation coil, the second excitation coil, the first detection coil, the second detection coil, drive rod, progressive motor and blanking disc；Computer controls STM32 development boards produce a sinusoidal signal, by after power amplifier amplification, it is loaded on the first excitation coil and the second excitation coil, there are two different coupling paths in the magnetic field of generation when propagating, one is INDIRECT COUPLING energy path, another is direct-coupling energy path, INDIRECT COUPLING magnetic field signal is measured by the first detection coil and the second detection coil, and signal acquisition is entered into STM32 development boards, just can intuitively be displayed whether by the change of the amplitude and phase of observation signal defective, the utility model is without Hall element and oscillograph, with workable, the features such as low cost, in can apply to all kinds of Practical Projects.
Description
Technical field
The utility model proposes a kind of metallic conduit defect detecting device based on far-field eddy, belong to the lossless inspection of electromagnetism
Survey field.
Background technology
Pipeline is widely used in the multiple industry such as oil gas, chemical industry, electric power and heating, and the conveying to all kinds of resources is added
It is convenient, but these pipelines easily produce crack, corrosion equivalent damage under high temperature, hyperbaric environment, can bring safety to production, life
Hidden danger, if can not find in time, once producing the accidents such as blast, leakage, will cause sizable economic loss, in some instances it may even be possible to meeting
Have some casualties.Therefore study a set of effective, the cannot-harm-detection device for being especially adaptable to pipeline field environment is necessary.
Detection to defects such as corrosion, existing lossless detection method such as ray, ultrasound, magnetic and infiltration etc. are adapting to the high/low temperature at scene
The aspects such as environment, equipment surface situation have respective deficiency, such as：Need and metal body carries out good coupling, so that
Ultrasonic wave can realize the propagation and reception between sensor and metal body；The measurement of wall thickness is put generally be directed to certain, no
Suitable for the scanning detection of large area, therefore detection speed is slowly.And Far Field Swirl Detecting Technology is to utilize to be vortexed far field
Zone properties carry out defects detection one in special lossless detection method, be easy to easy to detect, workable, testing result
The advantages of acquisition.
Compared with traditional eddy detection technology, it is not limited Far Field Swirl Detecting Technology by vortex skin depth, energy
Enough with same sensitivity technique inner surface of tube wall and the defect of outer surface.The utility model devises a kind of suitable for metallic conduit
The sensor of defects detection, employs STM32 development boards, with portable, the features such as sweep speed is fast, with stronger feasible
Property.
The content of the invention
The purpose of this utility model is to provide a kind of metallic conduit defect detecting device based on far-field eddy.The device
The defects detection to metallic conduit outside and inside can be realized using low frequency electromagnetic.With without yoke, portable, scanning
The features such as speed is fast, sensitivity is high.
The utility model is achieved through the following technical solutions：A kind of metallic conduit defects detection dress based on far-field eddy
Put, it is characterised in that：Swashed by computer (1), STM32 development boards (2), power amplifier (3), the first excitation coil (4), second
Encourage coil (5), the first detection coil (6), the second detection coil (7), drive rod (8), progressive motor (9) and blanking disc (10) group
Into；Computer (1) controls STM32 development boards (2) to produce a sinusoidal signal, by after power amplifier (3) amplification, being loaded into
On first excitation coil (4) and the second excitation coil (5), there are two different coupling paths, one in the magnetic field of generation when propagating
It is INDIRECT COUPLING energy path, another is direct-coupling energy path, by the first detection coil (6) and the second detection coil
(7) measure INDIRECT COUPLING magnetic field signal, and signal acquisition entered into STM32 development boards (2), by the amplitude of observation signal and
The change of phase just can intuitively display whether defective, and drive rod (8) provides kinetic energy and realizes scanning by progressive motor (9),
Blanking disc (10) is for accelerating the decay in direct-coupling magnetic field.
A kind of described metallic conduit defect detecting device based on far-field eddy, it is characterised in that：The product of pumping signal
Place reason STM32 development boards (2) of raw and signal is completed.
A kind of described metallic conduit defect detecting device based on far-field eddy, it is characterised in that：Driving frequency is 0-
100Hz。
A kind of described metallic conduit defect detecting device based on far-field eddy, it is characterised in that：Blanking disc (10)
Material uses ferrite.
A kind of described metallic conduit defect detecting device based on far-field eddy, it is characterised in that：First excitation coil
(4), the spacing between the second excitation coil (5) and the first detection coil (6), the second detection coil (7) is pipeline (11) diameter
2-3 times.
Operation principle of the present utility model is：The utility model utilizes electromagnetic induction principle, is detected using cordless
The surface of tested equipment and inner defect, excitation coil can produce an alternating magnetic field in the lower of lower frequency, magnetic field energy to
There are two different coupling paths at the two ends of pipeline when propagating, and the change in INDIRECT COUPLING magnetic field are detected by detection coil, and divide
Coil Detector signal voltage amplitude and phase is analysed to judge whether defect.STM32 development boards are controlled by computer (1) first
(2) sinusoidal signal is produced, by after power amplifier (3) amplification, being loaded into the first excitation coil (4) and the second excitation line
On circle (5), there are two different coupling paths in the magnetic field of generation when propagating, and one is INDIRECT COUPLING energy path, and another is
Direct-coupling energy path, INDIRECT COUPLING magnetic field signal is measured by the first detection coil (6) and the second detection coil (7),
And signal acquisition is entered into STM32 development boards (2), just can intuitively be shown by the change of the amplitude and phase of observation signal is
It is no defective.
The beneficial effects of the utility model are：A kind of metallic conduit defect detecting device based on far-field eddy is not received
The influence of the environmental factors such as time, space, with without yoke, portable, sweep speed is fast, sensitivity is high the features such as.
Brief description of the drawings
Fig. 1 is a kind of metallic conduit defect detecting device based on far-field eddy of the present utility model.
Fig. 2 is the graph of a relation of defect of the present utility model and detection signal amplitude.
Fig. 3 is the graph of a relation of defect of the present utility model and detection signal phase.
Specific embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Referring to accompanying drawing 1, a kind of metallic conduit defect detecting device based on far-field eddy, it is characterised in that：By computer
(1), STM32 development boards (2), power amplifier (3), the first excitation coil (4), the second excitation coil (5), the first detection coil
(6), the second detection coil (7), drive rod (8), progressive motor (9) and blanking disc (10) composition；Computer (1) controls STM32
Development board (2) produces a sinusoidal signal, by after power amplifier (3) amplification, being loaded into the first excitation coil (4) and second
On excitation coil (5), there are two different coupling paths in the magnetic field of generation when propagating, and one is INDIRECT COUPLING energy path, separately
One is direct-coupling energy path, and INDIRECT COUPLING magnetic field is measured by the first detection coil (6) and the second detection coil (7)
Signal, and signal acquisition is entered into STM32 development boards (2), just can be intuitively by the change of the amplitude and phase of observation signal
Display whether defective.
Wherein, the frequency range that STM32 development boards (2) are produced is 0-100Hz, and the material of blanking disc (10) uses iron oxygen
Body, the spacing between the first excitation coil (4), the second excitation coil (5) and the first detection coil (6), the second detection coil (7)
It is 2-3 times of pipeline (11) diameter.Fig. 2 is the graph of a relation of defect and detection signal amplitude.Fig. 3 is defect and detection signal phase
Graph of a relation.
Claims (5)
1. a kind of metallic conduit defect detecting device based on far-field eddy, by computer (1), STM32 development boards (2), power
Amplifier (3), the first excitation coil (4), the second excitation coil (5), the first detection coil (6), the second detection coil (7), drive
Lever (8), progressive motor (9) and blanking disc (10) composition；Computer (1) controls STM32 development boards (2) to produce a sinusoidal letter
Number, by after power amplifier (3) amplification, being loaded on the first excitation coil (4) and the second excitation coil (5), the magnetic of generation
There are two different coupling paths field when propagating, and one is INDIRECT COUPLING energy path, and another is direct-coupling energy path,
INDIRECT COUPLING magnetic field signal is measured by the first detection coil (6) and the second detection coil (7), and signal acquisition is entered
STM32 development boards (2), defective, drive just can be intuitively displayed whether by the change of the amplitude and phase of observation signal
Lever (8) provides kinetic energy and realizes scanning by progressive motor (9), and blanking disc (10) is for accelerating the decay in direct-coupling magnetic field.
2. a kind of metallic conduit defect detecting device based on far-field eddy according to claim 1, it is characterised in that：Swash
Place reason STM32 development boards (2) of the generation and signal of encouraging signal is completed.
3. a kind of metallic conduit defect detecting device based on far-field eddy according to claim 1, it is characterised in that：Swash
Frequency is encouraged for 0-100Hz.
4. a kind of metallic conduit defect detecting device based on far-field eddy according to claim 1, it is characterised in that：Screen
The material for covering disk (10) uses ferrite.
5. a kind of metallic conduit defect detecting device based on far-field eddy according to claim 1, it is characterised in that：The
Spacing between one excitation coil (4), the second excitation coil (5) and the first detection coil (6), the second detection coil (7) is pipe
2-3 times of road (11) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621390171.0U CN206270297U (en) | 2016-12-14 | 2016-12-14 | A kind of metallic conduit defect detecting device based on far-field eddy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621390171.0U CN206270297U (en) | 2016-12-14 | 2016-12-14 | A kind of metallic conduit defect detecting device based on far-field eddy |
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| Publication Number | Publication Date |
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| CN206270297U true CN206270297U (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621390171.0U Active CN206270297U (en) | 2016-12-14 | 2016-12-14 | A kind of metallic conduit defect detecting device based on far-field eddy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501355A (en) * | 2016-12-14 | 2017-03-15 | 中国计量大学 | A kind of metallic conduit defect detecting device based on far-field eddy |
-
2016
- 2016-12-14 CN CN201621390171.0U patent/CN206270297U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501355A (en) * | 2016-12-14 | 2017-03-15 | 中国计量大学 | A kind of metallic conduit defect detecting device based on far-field eddy |
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