Magnetic ring on-line detection device and system

Abstract

The invention provides a magnetic ring on-line detection device and system. The magnetic ring on-line detection device comprises a magneto-optical sensor, a transmission module, a photoelectric conversion module and a processor, the conveying module is used for conveying a plurality of magnetic rings into a detection area of the magneto-optical sensor; the magneto-optical sensor is used for detecting the magnetic field intensity of the magnetic ring and converting a detection result into an optical signal; the photoelectric conversion module is used for converting the optical signal into an electric signal and transmitting the electric signal to the processor; the processor is used for analyzing and processing the electric signal to obtain a numerical value and a direction of the magnetic field intensity, generating a magnetic field distribution image according to the numerical value and the direction of the magnetic field intensity, and outputting a magnetic ring detection result according to the magnetic field distribution image. According to the invention, online real-time detection of the magnetic ring can be realized, and the detection efficiency and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the field of magnetic ring detection technology, and in particular to a magnetic ring online detection device and system. Background Art

[0002] In the coal mining industry, the position of the hydraulic support electro-hydraulic control system is detected by combining a magnetic ring with a stroke sensor to ensure safe mining of the coal mine. However, the magnetic field characteristics of the magnetic ring directly affect the performance of the equipment, so it is necessary to detect the magnetic ring. Currently, most of the magnetic ring detection equipment on the market relies on manual operation. The magnetic ring is manually moved on the stroke sensor and the waveform and voltage value are determined by an oscilloscope to detect whether the magnetic ring is qualified. This method is complicated to operate, requires manual intervention, has low detection efficiency, and the detection results are manually judged, which increases the risk of misjudgment. It is also easily affected by human factors, resulting in low reliability and consistency of the detection results. Summary of the invention

[0003] The present invention provides a magnetic ring online detection device and system, which are used to solve the defects of traditional magnetic ring detection devices, such as needing manual intervention, low detection efficiency, being easily affected by human factors, and low reliability and consistency of detection results.

[0004] The present invention provides a magnetic ring online detection device, comprising: Magneto-optical sensor, transmission module, photoelectric conversion module and processor; The transmission module is used to transmit a plurality of magnetic rings into the detection area of ​​the magneto-optical sensor; The magneto-optical sensor is used to detect the magnetic field strength of the magnetic ring and convert the detection result into an optical signal; The photoelectric conversion module is used to convert the optical signal into an electrical signal and transmit the electrical signal to the processor; The processor analyzes and processes the electrical signal to obtain the value and direction of the magnetic field strength, generates a magnetic field distribution image according to the value and direction of the magnetic field strength, and outputs a magnetic ring detection result according to the magnetic field distribution image.

[0005] According to the magnetic ring online detection device provided by the present invention, the magneto-optical sensor is a plurality of magneto-optical sensors based on the Faraday effect, which are distributed as a magneto-optical sensor array to detect the two-dimensional magnetic field distribution of the magnetic ring through the magneto-optical sensor array.

[0006] According to the magnetic ring online detection device provided by the present invention, the transmission module is used to transmit multiple magnetic rings to the detection range of the magneto-optical sensor, including: The transmission module adjusts the positions of the plurality of magnetic rings according to the set detection sequence and interval time, so that each magnetic ring passes through the detection area of ​​the magneto-optical sensor in turn.

[0007] The magnetic ring online detection device provided by the present invention also includes: A signal amplifier is connected to the photoelectric converter and the processor, and is used to amplify the electrical signal output by the photoelectric converter and then input it into the processor.

[0008] According to the magnetic ring online detection device provided by the present invention, the processor analyzes and processes the electrical signal to obtain the value and direction of the magnetic field strength, including: the processor uses a filtering method to filter the amplified electrical signal to retain the preset frequency component; Extracting key features from the preset frequency components, wherein the key features include frequency, phase and amplitude; The strength of the electrical signal is quantified and calibrated according to the frequency and amplitude, and the quantized and calibrated electrical signal is mapped with the magnetic field strength to obtain a magnetic field strength value; and the direction of the magnetic field is determined according to multiple phase information.

[0009] According to the magnetic ring online detection device provided by the present invention, the generating of the magnetic field distribution image according to the value and direction of the magnetic field strength includes: The magnetic field intensity value of each sensor detection point is interpolated to obtain a continuous spatial magnetic field distribution; a coordinate system is constructed, and the continuous spatial magnetic field distribution is filled into the coordinate system to obtain a magnetic field distribution image.

[0010] The magnetic ring online detection device provided by the present invention also includes a display module.

[0011] The processor is further used to render the magnetic field distribution image, using color gradients or contour lines to represent different levels of magnetic field intensity, and using arrows or vector lines to represent the magnetic field direction. The display module is used to display the rendered magnetic field distribution image.

[0012] According to the magnetic ring online detection device provided by the present invention, the outputting of the magnetic ring detection result according to the magnetic field distribution image comprises: Preprocessing the magnetic field distribution image, wherein the preprocessing includes at least one of removing noise, enhancing contrast, and edge detection; Extracting key features of the preprocessed magnetic field distribution image, wherein the key features include at least one of a mean value, a variance, a maximum value, a minimum value of the magnetic field intensity distribution, and a direction of the magnetic field; The extracted key features are compared with the key features of a preset standard image, and when the comparison result exceeds a preset threshold, the magnetic ring is determined to be unqualified.

[0013] The magnetic ring online detection device provided by the present invention also includes: A memory, wherein the memory is used to store the magnetic field strength of the magnetic ring detected by the magneto-optical sensor and the corresponding detection result output by the processor.

[0014] The present invention also provides a magnetic ring online detection system, comprising the magnetic ring online detection device as described above.

[0015] The present invention provides an online detection device and system for magnetic rings, which include a magneto-optical sensor, a transmission module, a photoelectric conversion module and a processor; the transmission module is used to transmit multiple magnetic rings to the detection area of ​​the magneto-optical sensor; the magneto-optical sensor is used to detect the magnetic field strength of the magnetic rings and convert the detection results into optical signals; the photoelectric conversion module is used to convert the optical signals into electrical signals and transmit the electrical signals to the processor; the processor analyzes and processes the electrical signals to obtain the value and direction of the magnetic field strength, generates a magnetic field distribution image according to the value and direction of the magnetic field strength, and outputs the magnetic ring detection results according to the magnetic field distribution image. Compared with the traditional method of putting the magnetic ring on the travel sensor for moving to perform magnetic ring detection, the present invention can realize online real-time detection of magnetic rings to improve the efficiency and accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of a magnetic ring online detection device provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the process of the magnetic ring online detection device provided by an embodiment of the present invention; Figure 3 is a schematic diagram of a standard magnetic ring magnetic field distribution image provided by an embodiment of the present invention; Figure 4 It is a schematic diagram of the magnetic field distribution image of a damaged magnetic ring provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Figure 1 A structural diagram of a magnetic ring online detection device provided in an embodiment of the present invention, the magnetic ring online detection device comprises: A magneto-optical sensor 101, a transmission module 102, a photoelectric conversion module 103 and a processor (not shown in the figure); The transmission module 102 is used to transmit the multiple magnetic rings to the detection area of ​​the magneto-optical sensor 101; In an embodiment of the present invention, the transmission module is used to transmit a plurality of magnetic rings into the detection range of the magneto-optical sensor, and includes: The transmission module 102 adjusts the positions of the plurality of magnetic rings according to the set detection sequence and interval time, so that each magnetic ring passes through the detection area of ​​the magneto-optical sensor 101 in sequence.

[0020] In the embodiment of the present invention, the transmission module can automatically transmit multiple magnetic rings for detection, automatically adjust the positions of the magnetic rings, and make each magnetic ring pass through the detection area of ​​the magneto-optical sensor in turn, thereby significantly improving the detection efficiency.

[0021] The magneto-optical sensor 101 is used to detect the magnetic field strength of the magnetic ring and convert the detection result into an optical signal; In the embodiment of the present invention, the magneto-optical sensor 101 is a plurality of magneto-optical sensors based on the Faraday effect, which are distributed as a magneto-optical sensor array so as to detect the two-dimensional magnetic field distribution of the magnetic ring through the magneto-optical sensor array.

[0022] In the embodiment of the present invention, the Faraday effect can detect magnetic field changes with high precision, and has the advantages of high sensitivity and fast response speed. After the magnetic ring sample to be detected is transferred to the detection area of ​​the magneto-optical sensor, a magnetic field image can be obtained, which has high sensitivity and high resolution, and the process visualizes the magnetic pole structure, material unevenness and cracks, thereby improving the real-time detection.

[0023] The photoelectric conversion module 103 is used to convert the optical signal into an electrical signal and transmit the electrical signal to the processor; The processor is used to analyze and process the electrical signal, obtain the value and direction of the magnetic field strength, generate a magnetic field distribution image according to the value and direction of the magnetic field strength, and output the magnetic ring detection result according to the magnetic field distribution image.

[0024] Traditional magnetic ring detection equipment relies on manual operation, which is to manually move the magnetic ring on the travel sensor and use an oscilloscope to determine the waveform and voltage value to detect whether the magnetic ring is qualified. This method is complicated to operate, requires manual intervention, has low detection efficiency, and the detection results are manually judged, which increases the risk of misjudgment. It is also easily affected by human factors, resulting in low reliability and consistency of the detection results.

[0025] The magnetic ring online detection device provided by the embodiment of the present invention includes a magneto-optical sensor, a transmission module, a photoelectric conversion module and a processor; the transmission module is used to transmit multiple magnetic rings to the detection area of ​​the magneto-optical sensor; the magneto-optical sensor is used to detect the magnetic field strength of the magnetic ring and convert the detection result into an optical signal; the photoelectric conversion module is used to convert the optical signal into an electrical signal and transmit the electrical signal to the processor; the processor analyzes and processes the electrical signal to obtain the value and direction of the magnetic field strength, generates a magnetic field distribution image according to the value and direction of the magnetic field strength, and outputs the magnetic ring detection result according to the magnetic field distribution image. Compared with the traditional method of putting the magnetic ring on the travel sensor for moving the magnetic ring detection, the present invention can realize online real-time detection of the magnetic ring to improve the efficiency and accuracy of the detection.

[0026] Based on any of the above embodiments, the magnetic ring online detection device provided by the embodiment of the present invention also includes: A signal amplifier is connected to the photoelectric converter and the processor, and is used to amplify the electrical signal output by the photoelectric converter and then input it into the processor.

[0027] In an embodiment of the present invention, the processor analyzes and processes the electrical signal to obtain the value and direction of the magnetic field strength, including: the processor uses a filtering method to filter the amplified electrical signal to retain a preset frequency component; Extracting key features from the preset frequency components, wherein the key features include frequency, phase and amplitude; The strength of the electrical signal is quantified and calibrated according to the frequency and amplitude, and the quantized and calibrated electrical signal is mapped with the magnetic field strength to obtain a magnetic field strength value; and the direction of the magnetic field is determined according to multiple phase information.

[0028] In an embodiment of the present invention, generating a magnetic field distribution image according to the value and direction of the magnetic field strength includes: The magnetic field intensity value of each sensor detection point is interpolated to obtain a continuous spatial magnetic field distribution; a coordinate system is constructed, and the continuous spatial magnetic field distribution is filled into the coordinate system to obtain a magnetic field distribution image.

[0029] In some embodiments of the present invention, a display module is further included.

[0030] The processor is further used to render the magnetic field distribution image, using color gradients or contour lines to represent different levels of magnetic field intensity, and using arrows or vector lines to represent the magnetic field direction. The display module is used to display the rendered magnetic field distribution image.

[0031] In an embodiment of the present invention, outputting a magnetic ring detection result according to the magnetic field distribution image includes: Preprocessing the magnetic field distribution image, wherein the preprocessing includes at least one of removing noise, enhancing contrast, and edge detection; Extracting key features of the preprocessed magnetic field distribution image, wherein the key features include at least one of a mean value, a variance, a maximum value, a minimum value of the magnetic field intensity distribution, and a direction of the magnetic field; The extracted key features are compared with the key features of a preset standard image, and when the comparison result exceeds a preset threshold, the magnetic ring is determined to be unqualified.

[0032] In some embodiments of the present invention, the magnetic ring online detection device provided by the embodiment of the present invention further includes: A memory, wherein the memory is used to store the magnetic field strength of the magnetic ring detected by the magneto-optical sensor and the corresponding detection result output by the processor.

[0033] Traditional magnetic ring detection devices cannot realize automatic data recording and tracing, which brings inconvenience to subsequent analysis and maintenance. The magnetic ring magnetic field online detection device provided by the embodiment of the present invention can automatically detect the magnetic field characteristics of the magnetic ring, determine whether it is qualified by image recognition, automatically record the detection data, and realize data tracing.

[0034] like Figure 2 As shown, when performing magnetic ring detection, multiple magnetic rings are placed on the conveyor belt of the conveying module. After the device is started, the conveying module starts to convey the magnetic rings, and the magneto-optical sensor automatically detects the magnetic field of the magnetic rings. The photoelectric conversion module converts the detected optical signal into an electrical signal and transmits it to the processor for processing. The processor analyzes the received electrical signal, calculates the value of the magnetic field strength in the sub-area, automatically determines whether the magnetic ring is qualified, and displays the test results in real time through the display module. The test data is also stored in the built-in memory to form a test record. Users can export the test data through the detection software system and analyze the data in detail. The software system supports the export of multiple data formats, which is convenient for users to perform subsequent processing and application.

[0035] The magnetic ring online detection device provided by the present invention realizes the automatic detection of the magnetic field of the magnetic ring, realizes the continuous detection of multiple magnetic rings through the transmission module, and improves the detection efficiency; it automatically determines whether the magnetic ring is qualified without manual intervention, and improves the detection reliability; the magneto-optical sensor using the Faraday effect has the characteristics of high sensitivity and high precision, and can accurately measure the magnetic field intensity. It automatically recognizes the magnetic field image and automatically records the detection data to determine whether it is qualified or not, supports image and data tracing and export, and is convenient for users to perform subsequent analysis and maintenance.

[0036] An embodiment of the present invention further provides a magnetic ring online detection system, comprising the magnetic ring online detection device as described in the above embodiment.

[0037] The magnetic ring online detection system of the embodiment of the present invention further includes a computer. In some embodiments of the present invention, the computer is also used to compare the magnetic field distribution image with the preset standard image and output the magnetic ring detection result. The computer has developed a detection software system that can display, analyze and store the detection data in real time. The detection software system also supports data export and tracing, which is convenient for users to consult and analyze historical detection data.

[0038] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0039] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic ring online detection device, characterized in that: include: Magneto-optical sensor, transmission module, photoelectric conversion module and processor; The transmission module is used to transmit a plurality of magnetic rings into the detection area of ​​the magneto-optical sensor; The magneto-optical sensor is used to detect the magnetic field strength of the magnetic ring and convert the detection result into an optical signal; The photoelectric conversion module is used to convert the optical signal into an electrical signal and transmit the electrical signal to the processor; The processor analyzes and processes the electrical signal to obtain the value and direction of the magnetic field strength, generates a magnetic field distribution image according to the value and direction of the magnetic field strength, and outputs a magnetic ring detection result according to the magnetic field distribution image.

2. The magnetic ring online detection device according to claim 1, characterized in that: The magneto-optical sensors are a plurality of magneto-optical sensors based on the Faraday effect, which are distributed in a magneto-optical sensor array so as to detect the two-dimensional magnetic field distribution of the magnetic ring through the magneto-optical sensor array.

3. The magnetic ring online detection device according to claim 1, characterized in that: The transmission module is used to transmit a plurality of magnetic rings to the detection range of the magneto-optical sensor, and includes: The transmission module adjusts the positions of the plurality of magnetic rings according to the set detection sequence and interval time, so that each magnetic ring passes through the detection area of ​​the magneto-optical sensor in turn.

4. The magnetic ring online detection device according to claim 1, characterized in that: Also includes: A signal amplifier is connected to the photoelectric converter and the processor, and is used to amplify the electrical signal output by the photoelectric converter and then input it into the processor.

5. The magnetic ring online detection device according to claim 4, characterized in that: The processor analyzes and processes the electrical signal to obtain the value and direction of the magnetic field strength, including: the processor uses a filtering method to filter the amplified electrical signal to retain a preset frequency component; Extracting key features from the preset frequency components, wherein the key features include frequency, phase and amplitude; The strength of the electrical signal is quantified and calibrated according to the frequency and amplitude, and the quantized and calibrated electrical signal is mapped with the magnetic field strength to obtain a magnetic field strength value; and the direction of the magnetic field is determined according to multiple phase information.

6. The magnetic ring online detection device according to claim 1, characterized in that: Generating a magnetic field distribution image according to the value and direction of the magnetic field strength includes: The magnetic field intensity value of each sensor detection point is interpolated to obtain a continuous spatial magnetic field distribution; a coordinate system is constructed, and the continuous spatial magnetic field distribution is filled into the coordinate system to obtain a magnetic field distribution image.

7. The magnetic ring online detection device according to claim 6, characterized in that: Also includes a display module, The processor is further used to render the magnetic field distribution image, using color gradients or contour lines to represent different levels of magnetic field intensity, and using arrows or vector lines to represent the magnetic field direction. The display module is used to display the rendered magnetic field distribution image.

8. The magnetic ring online detection device according to claim 1, characterized in that: Outputting the magnetic ring detection result according to the magnetic field distribution image comprises: Preprocessing the magnetic field distribution image, wherein the preprocessing includes at least one of removing noise, enhancing contrast, and edge detection; Extracting key features of the preprocessed magnetic field distribution image, wherein the key features include at least one of a mean value, a variance, a maximum value, a minimum value of the magnetic field intensity distribution, and a direction of the magnetic field; The extracted key features are compared with the key features of a preset standard image, and when the comparison result exceeds a preset threshold, the magnetic ring is determined to be unqualified.

9. The magnetic ring online detection device according to claim 1, characterized in that: Also includes: A memory, wherein the memory is used to store the magnetic field strength of the magnetic ring detected by the magneto-optical sensor and the corresponding detection result output by the processor.

10. A magnetic ring online detection system, characterized in that: It comprises the magnetic ring online detection device as described in any one of claims 1 to 9.

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