CN212083317U - Defect magnetic mark measuring system - Google Patents
Defect magnetic mark measuring system Download PDFInfo
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- CN212083317U CN212083317U CN202020740161.5U CN202020740161U CN212083317U CN 212083317 U CN212083317 U CN 212083317U CN 202020740161 U CN202020740161 U CN 202020740161U CN 212083317 U CN212083317 U CN 212083317U
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Abstract
The application relates to a defect magnetic mark measurement system, which comprises: the acquisition unit is used for acquiring the image information of the magnetized detected piece; the identification unit is used for judging whether the image information has the defect magnetic marks or not and acquiring a defect magnetic mark detection result; and the controller is used for determining the length of the defect magnetic mark according to the detection result of the defect magnetic mark. According to the technical scheme, the automation of the defect magnetic mark measurement is realized, and the reliability and the accuracy of the defect magnetic mark measurement are improved.
Description
Technical Field
The application belongs to the technical field of nondestructive testing, and particularly relates to a defect magnetic trace measuring system.
Background
The magnetic particle detection is used as a conventional and mature detection method, and is widely applied to nondestructive detection of butt joints of equipment, towers, pipelines, spherical tanks and storage tanks of oil refining and chemical devices. In the magnetic particle inspection process, determination of defective magnetic traces and measurement of defective magnetic traces are important parts.
In the related art, when measuring the magnetic marks, an operator is required to manually spray magnetic suspension on the surface of a workpiece, judge whether the defect magnetic marks exist by naked eyes and then measure the defect magnetic marks. However, there is a time difference between the spraying of the magnetic suspension and the measurement of the defective magnetic mark by the worker, and thus the measured defective magnetic mark may be inaccurate. And the ultraviolet lamp used by the working personnel in the process of measuring the defect magnetic marks has great harm to the human body.
Aiming at some field operation sites, if a tester does not have a steel plate ruler, the magnetic marks can be shallow or disappear as long as the magnetization is stopped, the length measurement cannot be carried out, the detection result is invalid, and manpower and material resources are wasted. For some complex workpieces, if the position of a defect is found to be narrow, the length measurement cannot be carried out, and the reliability of a detection result is seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that the measured defect magnetic marks can not be accurate in the related art at least to a certain extent, the magnetic powder detection system is provided.
According to a first aspect of embodiments of the present application, there is provided a defect magnetic trace measuring system, including:
the acquisition unit is used for acquiring the image information of the magnetized detected piece;
the identification unit is used for judging whether the image information has the defect magnetic marks or not and acquiring a defect magnetic mark detection result;
and the controller is used for determining the length of the defect magnetic mark according to the detection result of the defect magnetic mark.
Preferably, the collecting unit includes:
the illumination module is used for illuminating the detected piece;
and the camera module is used for acquiring the image information of the magnetized detected piece.
Preferably, the identification unit includes:
the acquisition module is used for inputting the image information into a preset defect magnetic mark model according to the defect magnetic mark characteristic data and acquiring a defect magnetic mark detection result;
the first judgment module is used for sending the detection result of the defective magnetic mark with the defective magnetic mark to the controller if the detection result of the defective magnetic mark is that the defective magnetic mark exists; and if the detection result of the defective magnetic traces is that the defective magnetic traces do not exist, sending the detection result of the defective magnetic traces without the defective magnetic traces to a controller.
Further, the identification unit includes:
and the establishing module is used for establishing the preset defect magnetic mark model.
Further, the establishing module is specifically configured to:
and taking historical acquired image information of the magnetized detected piece as an input layer training sample of the deep neural network model, and taking image information with the defect magnetic traces in the historical acquired image information of the magnetized detected piece as an output layer training sample to obtain the preset defect magnetic trace model.
Preferably, the controller includes: the second judgment module and the calculation module;
the second judgment module is used for sending a message for re-acquiring the image information of the magnetized detected piece to the acquisition unit if the detection result of the defective magnetic trace which is sent by the first judgment module and does not have the defective magnetic trace is received; if a defect magnetic trace detection result with defect magnetic traces sent by the first judgment module is received, sending a message of needing to calculate the length of the defect magnetic traces to the calculation module;
and the calculating module is used for calculating the length of the defect magnetic mark according to the length of the pixel point of the defect magnetic mark.
Further, the calculation module is specifically configured to:
determining the length S of the defect magnetic mark according to the following formula:
S＝L*[M-m(Q-C)]
in the above formula, L is the length of a pixel point of a defect magnetic mark, M is a camera scale factor, M is a scale calibration factor, Q is the center of gravity position of the defect magnetic mark in a collected image, and C is a constant.
Preferably, the system further comprises:
and the power supply unit is used for supplying power to the acquisition unit, the acquisition unit and the controller.
Preferably, the system further comprises:
a display unit for displaying the image information of the magnetized inspected piece and the length of the defect magnetic mark;
the acquisition unit is also used for sending the acquired image information of the magnetized detected piece to the display unit;
the controller is also configured to send the length of the defect magnetic mark to the display unit.
Preferably, the system further comprises: the storage unit is used for storing the acquired image information of the magnetized detected piece, the detection result of the defect magnetic mark and the length of the defect magnetic mark;
the acquisition unit is also used for sending the acquired magnetized image information of the detected piece to the storage unit;
the identification unit is further used for sending the detection result of the defect magnetic mark to a storage unit;
the controller is further used for sending the length of the defect magnetic mark to a storage unit.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the defect magnetic mark measuring system is constructed by the acquisition unit, the identification unit and the controller, so that the automation of the defect magnetic mark measurement is realized, on one hand, the reliability and the accuracy of the defect magnetic mark measurement are improved, and the damage of an adopted ultraviolet lamp to a human body is avoided; on the other hand, the trouble that no steel plate ruler or a narrow detection position is available in a detection field, and the defect length cannot be measured is solved, and the purpose of standardized operation standardized management can be achieved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic diagram of a system for measuring a magnetic defect according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another defect magnetic trace measuring system according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of an apparatus, method, or system consistent with certain aspects of the application, as detailed in the claims that follow.
Fig. 1 is a schematic structural diagram of a defect magnetic mark measuring system according to an embodiment, as shown in fig. 1, the system includes:
the acquisition unit is used for acquiring the image information of the magnetized detected piece;
the identification unit is used for judging whether the image information has the defect magnetic marks or not and acquiring a defect magnetic mark detection result;
and the controller is used for determining the length of the defect magnetic mark according to the detection result of the defect magnetic mark.
It should be noted that the controller can be implemented by, but not limited to, a programmable logic controller.
According to the system for measuring the magnetic defect mark, the acquisition unit is used for acquiring the image information of the magnetized detected piece, the identification unit is used for judging whether the image information has the magnetic defect mark or not, the detection result of the magnetic defect mark is obtained, and the controller is used for determining the length of the magnetic defect mark according to the detection result of the magnetic defect mark, so that on one hand, the reliability and the accuracy of the measurement of the magnetic defect mark are improved, and the damage of an adopted ultraviolet lamp to a human body is avoided; on the other hand, the trouble that no steel plate ruler or a narrow detection position is available in a detection field, and the defect length cannot be measured is solved, and the purpose of standardized operation standardized management can be achieved.
As an improvement to the above embodiment, an embodiment of the present invention provides a schematic structural diagram of another defect magnetic trace measuring system, as shown in fig. 2, including:
the acquisition unit is used for acquiring the image information of the magnetized detected piece;
the identification unit is used for judging whether the image information has the defect magnetic marks or not and acquiring a defect magnetic mark detection result;
and the controller is used for determining the length of the defect magnetic mark according to the detection result of the defect magnetic mark.
It should be noted that the controller can be implemented by, but not limited to, a programmable logic controller.
Further, the acquisition unit includes:
the illumination module is used for illuminating the detected piece;
and the camera module is used for acquiring the image information of the magnetized detected piece.
Specifically, the lighting module may be, but is not limited to, performing fluorescent white light switching lighting.
In some embodiments, the camera module may be, but is not limited to being, implemented by a video camera.
It should be noted that the manner of "lighting module" referred to in the embodiments of the present invention is well known to those skilled in the art, and therefore, the specific implementation manner thereof is not described too much.
Further, the identification unit includes:
the establishing module is used for establishing a preset defect magnetic mark model;
the acquisition module is used for inputting the image information into a preset defect magnetic mark model according to the defect magnetic mark characteristic data and acquiring a defect magnetic mark detection result;
the first judgment module is used for sending a detection result of the defective magnetic trace with the defective magnetic trace to the controller if the detection result of the defective magnetic trace is that the defective magnetic trace exists; and if the detection result of the defective magnetic traces is that the defective magnetic traces do not exist, sending the detection result of the defective magnetic traces without the defective magnetic traces to the controller.
Further, the establishing module is specifically configured to:
and taking the historical acquired image information of the magnetized detected piece as an input layer training sample of the deep neural network model, and taking the image information with the defect magnetic traces in the historical acquired image information of the magnetized detected piece as an output layer training sample to obtain a preset defect magnetic trace model.
It should be noted that the "deep neural network model" in the present embodiment is well known to those skilled in the art, and therefore, the specific implementation manner thereof is not described too much.
It is easily understood that a person skilled in the art can also build the defect magnetic trace model by other models than the deep neural network model in the field of machine learning.
Further, a controller, comprising: the second judgment module and the calculation module;
the second judgment module is used for sending a message for re-collecting the image information of the magnetized detected piece to the collection unit if the detection result of the defect magnetic trace which is sent by the first judgment module and does not have the defect magnetic trace is received; if a defect magnetic trace detection result with defect magnetic traces sent by the first judgment module is received, sending a message of needing to calculate the length of the defect magnetic traces to the calculation module;
and the calculating module is used for calculating the length of the defect magnetic mark according to the length of the pixel point of the defect magnetic mark.
Specifically, the calculation module is specifically configured to:
the length S of the defect magnetic mark is determined according to the following formula:
S＝L*[M-m(Q-C)]
in the above formula, L is the length of a pixel point of the defect magnetic mark, M is a camera scale factor, M is a scale calibration factor, Q is the center of gravity position of the defect magnetic mark in the acquired image, and C is a constant.
It should be noted that the "constant C" related to this embodiment may be set according to experimental data or expert experience; for example, the constant C may be, but is not limited to, 60.
Further, the system further comprises:
and the power supply unit is used for supplying power to the acquisition unit, the acquisition unit and the controller.
In some embodiments, the power supply unit may be implemented, but is not limited to, by a lithium battery pack and a lithium battery protection circuit board; the lithium battery protection circuit board is used for protecting the lithium battery pack in real time when the current and voltage are overlarge.
Further, the system further comprises:
a display unit for displaying the image information of the magnetized inspected piece and the length of the defect magnetic mark;
the acquisition unit is also used for sending the acquired magnetized image information of the detected piece to the display unit;
the controller is also used for sending the length of the defect magnetic mark to the display unit.
In some embodiments, the display unit may be, but is not limited to, a touch or non-touch display.
Further, the system further comprises: the storage unit is used for storing the acquired image information of the magnetized detected piece, the detection result of the defect magnetic mark and the length of the defect magnetic mark;
it is easy to understand that after the storage unit stores the length of the defect magnetic trace, a printed report can be formed, so that the printed report can be more easily viewed by a worker.
The acquisition unit is also used for sending the acquired magnetized image information of the detected piece to the storage unit;
the identification unit is further used for sending the detection result of the defect magnetic mark to a storage unit;
the controller is further used for sending the length of the defect magnetic mark to a storage unit.
According to the system for measuring the magnetic defect mark, the acquisition unit is used for acquiring the image information of the magnetized detected piece, the identification unit is used for judging whether the image information has the magnetic defect mark or not and acquiring the detection result of the magnetic defect mark, and the controller is used for improving the reliability and accuracy of the measurement of the magnetic defect mark and avoiding the damage of an adopted ultraviolet lamp to a human body according to the detection result of the magnetic defect mark; on the other hand, the trouble that no steel plate ruler or a narrow detection position is available in a detection field, and the defect length cannot be measured is solved, and the purpose of standardized operation standardized management can be achieved.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A system for measuring magnetic defect, the system comprising:
the acquisition unit is used for acquiring the image information of the magnetized detected piece;
the identification unit is used for judging whether the image information has the defect magnetic marks or not and acquiring a defect magnetic mark detection result;
and the controller is used for determining the length of the defect magnetic mark according to the detection result of the defect magnetic mark.
2. The system of claim 1, wherein the acquisition unit comprises:
the illumination module is used for illuminating the detected piece;
and the camera module is used for acquiring the image information of the magnetized detected piece.
3. The system of claim 1, wherein the identification unit comprises:
the acquisition module is used for inputting the image information into a preset defect magnetic mark model according to the defect magnetic mark characteristic data and acquiring a defect magnetic mark detection result;
the first judgment module is used for sending the detection result of the defective magnetic mark with the defective magnetic mark to the controller if the detection result of the defective magnetic mark is that the defective magnetic mark exists; and if the detection result of the defective magnetic traces is that the defective magnetic traces do not exist, sending the detection result of the defective magnetic traces without the defective magnetic traces to a controller.
4. The system of claim 3, wherein the identification unit comprises:
and the establishing module is used for establishing the preset defect magnetic mark model.
5. The system of claim 4, wherein the establishing module is specifically configured to:
and taking historical acquired image information of the magnetized detected piece as an input layer training sample of the deep neural network model, and taking image information with the defect magnetic traces in the historical acquired image information of the magnetized detected piece as an output layer training sample to obtain the preset defect magnetic trace model.
6. The system of claim 3, wherein the controller comprises: the second judgment module and the calculation module;
the second judgment module is used for sending a message for re-acquiring the image information of the magnetized detected piece to the acquisition unit if the detection result of the defective magnetic trace which is sent by the first judgment module and does not have the defective magnetic trace is received; if a defect magnetic trace detection result with defect magnetic traces sent by the first judgment module is received, sending a message of needing to calculate the length of the defect magnetic traces to the calculation module;
and the calculating module is used for calculating the length of the defect magnetic mark according to the length of the pixel point of the defect magnetic mark.
7. The system of claim 6, wherein the computing module is specifically configured to:
determining the length S of the defect magnetic mark according to the following formula:
S＝L*[M-m(Q-C)]
in the above formula, L is the length of a pixel point of a defect magnetic mark, M is a camera scale factor, M is a scale calibration factor, Q is the center of gravity position of the defect magnetic mark in a collected image, and C is a constant.
8. The system of claim 1, further comprising:
and the power supply unit is used for supplying power to the acquisition unit, the acquisition unit and the controller.
9. The system of claim 1, further comprising:
a display unit for displaying the image information of the magnetized inspected piece and the length of the defect magnetic mark;
the acquisition unit is also used for sending the acquired image information of the magnetized detected piece to the display unit;
the controller is also configured to send the length of the defect magnetic mark to the display unit.
10. The system of claim 1, further comprising: the storage unit is used for storing the acquired image information of the magnetized detected piece, the detection result of the defect magnetic mark and the length of the defect magnetic mark;
the acquisition unit is also used for sending the acquired magnetized image information of the detected piece to the storage unit;
the identification unit is further used for sending the detection result of the defect magnetic mark to a storage unit;
the controller is further used for sending the length of the defect magnetic mark to a storage unit.
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| CN202020740161.5U CN212083317U (en) | 2020-05-07 | 2020-05-07 | Defect magnetic mark measuring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397356A (en) * | 2022-01-13 | 2022-04-26 | 江苏省特种设备安全监督检验研究院 | Intelligent magnetic powder detection method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114397356A (en) * | 2022-01-13 | 2022-04-26 | 江苏省特种设备安全监督检验研究院 | Intelligent magnetic powder detection method and system |
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