CN114002629A - System for detecting irregularity of magnetic field of permanent magnet track - Google Patents
System for detecting irregularity of magnetic field of permanent magnet track Download PDFInfo
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- CN114002629A CN114002629A CN202210000660.4A CN202210000660A CN114002629A CN 114002629 A CN114002629 A CN 114002629A CN 202210000660 A CN202210000660 A CN 202210000660A CN 114002629 A CN114002629 A CN 114002629A
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- magnetic field
- permanent magnet
- magnet track
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/10—Plotting field distribution ; Measuring field distribution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
- B61K9/08—Measuring installations for surveying permanent way
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
- G01R33/077—Vertical Hall-effect devices
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- General Physics & Mathematics (AREA)
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Abstract
The invention provides a detection system for the irregularity of a magnetic field of a permanent magnet track. The system comprises: the device comprises a permanent magnet track, a sensor bracket connected with a driving mechanism arranged above the permanent magnet track, a Hall sensor array arranged on the sensor bracket, a data acquisition unit in communication connection with the Hall sensor array, and an upper computer in communication connection with the data acquisition unit, wherein the Hall sensor array and the permanent magnet track are mutually spaced; the sensor bracket is used for walking along the extension direction of the permanent magnet track along with the driving mechanism; the Hall sensor array is used for acquiring magnetic field intensity data of the permanent magnet track according to a preset acquisition period; the data acquisition unit is used for receiving the magnetic field intensity data transmitted by the Hall sensor array and transmitting the magnetic field intensity data to the upper computer; and the upper computer is used for determining whether the magnetic field intensity of the permanent magnet track is normal or not according to the magnetic field intensity data and a preset magnetic field intensity threshold value, can accurately detect the smoothness of the magnetic field of the permanent magnet track, and ensures the running safety of the magnetic-levitation train.
Description
Technical Field
The invention relates to the technical field of magnetic levitation, in particular to a magnetic field irregularity detection system for a permanent magnet track.
Background
For a polymorphic coupling rail transit moving die test platform, a high-temperature superconducting pinning magnetic levitation model vehicle needs to realize test simulation with the highest speed reaching 1500km/h level, which means that the running safety and the reliability of a train need to be ensured to a certain extent.
The permanent magnet track system and the linear motor system are used as two key systems of the high-temperature superconducting pinned magnetic-levitation train, wherein the permanent magnet track system provides a unique magnetic field input source for the high-temperature superconducting pinned magnetic-levitation system to ensure stable and reliable suspension guiding behaviors of the high-temperature superconducting pinned magnetic-levitation system, the linear motor system provides a unique traction power source for the high-temperature superconducting pinned magnetic-levitation system to ensure that the train runs at a high speed along a line, the states and performances of the permanent magnet track system and the linear motor system are directly related to the running safety of the magnetic-levitation train, and the detection of the smoothness of the magnetic field of the permanent magnet track is necessary in the early stage of high-speed test running.
Disclosure of Invention
The invention aims to provide a detection system for the irregularity of a magnetic field of a permanent magnet track, which can accurately detect the smoothness of the magnetic field of the permanent magnet track and ensure the running safety of a maglev train.
In order to achieve the above object, the present invention provides a system for detecting the irregularity of a magnetic field of a permanent magnet track, comprising: the device comprises a permanent magnet track, a sensor support connected with a driving mechanism arranged above the permanent magnet track, a Hall sensor array arranged on the sensor support, a data acquisition unit in communication connection with the Hall sensor array, and an upper computer in communication connection with the data acquisition unit, wherein the Hall sensor array and the permanent magnet track are mutually spaced;
the sensor bracket is used for walking along the extension direction of the permanent magnet track along with the driving mechanism;
the Hall sensor array is used for acquiring magnetic field intensity data of the permanent magnet track according to a preset acquisition cycle and transmitting the magnetic field intensity data to the data acquisition unit;
the data acquisition unit is used for receiving magnetic field intensity data transmitted by the Hall sensor array and transmitting the magnetic field intensity data to an upper computer;
and the upper computer is used for determining whether the magnetic field intensity of the permanent magnet track is normal or not according to the magnetic field intensity data and a preset magnetic field intensity threshold value.
The Hall sensor array comprises a plurality of transverse Hall sensors which are sequentially arranged at intervals and a plurality of vertical Hall sensors which are sequentially arranged at intervals.
The plurality of transverse Hall sensors are arranged in a line along the width direction of the permanent magnet track;
the plurality of vertical Hall sensors are arranged in another row parallel to the plurality of transverse Hall sensors along the width direction of the permanent magnet track.
The interval between two adjacent horizontal hall sensors is 2~5mm, and the interval between two adjacent vertical hall sensors is 2~5 mm.
The preset acquisition period is that the detection is carried out once every 10-50 mm along the extension direction of the permanent magnet track.
The Hall sensor array and the permanent magnet track are mutually separated by 5-15 mm.
The data acquisition unit is arranged in the electric closed bin and travels along with the driving mechanism.
The host computer confirms according to magnetic field intensity data and predetermined magnetic field intensity threshold value scope and judges whether the magnetic field intensity of permanent magnetism track is normally specifically including:
receiving magnetic field intensity data transmitted by a data acquisition unit and a permanent magnet track point position corresponding to the magnetic field intensity data;
and comparing the magnetic field intensity data transmitted by the data acquisition unit with a preset magnetic field intensity threshold, judging that the magnetic field of the permanent magnet track point location is abnormal and giving an alarm when the magnetic field intensity data exceeds the preset magnetic field intensity threshold, and otherwise, judging that the magnetic field of the permanent magnet track point location is normal.
The host computer confirms according to magnetic field intensity data and predetermined magnetic field intensity threshold value and judges whether the magnetic field intensity of permanent magnetism track is normal specifically includes:
receiving magnetic field intensity data transmitted by a data acquisition unit and a permanent magnet track point position corresponding to the magnetic field intensity data;
drawing a magnetic field fluctuation curve according to the magnetic field intensity data and the permanent magnet track point positions corresponding to the magnetic field intensity data;
determining the magnetic field fluctuation rate of the permanent magnet track according to the magnetic field fluctuation curve and a preset magnetic field intensity threshold;
and comparing the magnetic field fluctuation rate of the permanent magnet track with a preset fluctuation rate threshold, judging that the overall magnetic field intensity of the permanent magnet track is not smooth when the magnetic field fluctuation rate exceeds the preset fluctuation rate threshold, and otherwise, judging that the overall magnetic field intensity of the permanent magnet track is smooth.
The sensor support is in decoupling connection with the driving mechanism.
The driving mechanism is a rail inspection vehicle.
The invention has the beneficial effects that: the invention provides a system for detecting the irregularity of a magnetic field of a permanent magnet track, which comprises: the device comprises a permanent magnet track, a sensor support connected with a driving mechanism arranged above the permanent magnet track, a Hall sensor array arranged on the sensor support, a data acquisition unit in communication connection with the Hall sensor array, and an upper computer in communication connection with the data acquisition unit, wherein the Hall sensor array and the permanent magnet track are mutually spaced; the sensor bracket is used for walking along the extension direction of the permanent magnet track along with the driving mechanism; the Hall sensor array is used for acquiring magnetic field intensity data of the permanent magnet track according to a preset acquisition cycle and transmitting the magnetic field intensity data to the data acquisition unit; the data acquisition unit is used for receiving magnetic field intensity data transmitted by the Hall sensor array and transmitting the magnetic field intensity data to an upper computer; the upper computer is used for determining whether the magnetic field intensity of the permanent magnet track is normal or not according to the magnetic field intensity data and a preset magnetic field intensity threshold value, can accurately detect the smoothness of the magnetic field of the permanent magnet track, and guarantees the running safety of the magnetic suspension train.
Drawings
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a schematic structural diagram of a magnetic field irregularity detection system for a permanent magnet track according to the present invention;
fig. 2 is a block diagram of the magnetic field irregularity detecting system of the permanent magnet track according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes are not set forth in detail in order to avoid obscuring the description of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
Referring to fig. 1, the present invention provides a system for detecting a magnetic field irregularity of a permanent magnet track, including: the sensor comprises a permanent magnet track 10, a sensor support 20 connected with a driving mechanism arranged above the permanent magnet track 10, a Hall sensor array 30 arranged on the sensor support 20, a data acquisition unit 40 in communication connection with the Hall sensor array 30, and an upper computer 50 in communication connection with the data acquisition unit 40, wherein the Hall sensor array 30 and the permanent magnet track 10 are mutually spaced;
the sensor bracket 20 is used for walking along the extending direction of the permanent magnet track 10 along with the driving mechanism;
the hall sensor array 30 is used for acquiring magnetic field intensity data of the permanent magnet track according to a preset acquisition period and transmitting the magnetic field intensity data to the data acquisition unit 40;
the data acquisition unit 40 is used for receiving the magnetic field intensity data transmitted by the Hall sensor array 30 and transmitting the magnetic field intensity data to the upper computer 50;
and the upper computer 50 is used for determining whether the magnetic field intensity of the permanent magnet track 10 is normal or not according to the magnetic field intensity data and a preset magnetic field intensity threshold value.
Specifically, in some embodiments of the present invention, the drive mechanism is a rail inspection vehicle.
Specifically, when the magnetic field detection device works in the actual process, the I-shaped rail and the rail bearing platform are mutually independent structural components, and the rail detection vehicle and the permanent magnet rail 10 have large position fluctuation, so that the detection error is large, and therefore the magnetic field detection device is additionally provided with the sensor support 20 which runs along with the driving mechanism and is in decoupling connection with the driving mechanism, and the stable detection of the magnetic field is realized.
Specifically, as shown in fig. 1, in some embodiments of the present invention, the hall sensor array 30 includes a plurality of horizontal hall sensors 31 arranged at intervals in sequence and a plurality of vertical hall sensors 32 arranged at intervals in sequence, where the horizontal hall sensors 31 and the vertical hall sensors 32 are respectively used for detecting a horizontal magnetic field and a vertical magnetic field of the permanent magnet track 10.
Further, as shown in fig. 1, in some embodiments of the present invention, the plurality of lateral hall sensors 31 are aligned in a width direction of the permanent magnet rail 10; the plurality of vertical hall sensors 32 are arranged in another row parallel to the plurality of horizontal hall sensors 31 along the width direction of the permanent magnet track 10, and the horizontal magnetic field and the vertical magnetic field of the permanent magnet track 10 are detected with high precision by the densely arranged horizontal hall sensors 31 and the vertical hall sensors 32.
It should be noted that the arrangement of the interval between two adjacent transverse vertical hall sensors 31 and the interval between two adjacent vertical hall sensors 32 needs to be determined by comprehensively considering the size and the number of the hall sensor structures and the magnetic field distribution, if the interval is too small, the hall sensors cannot be installed, and if the interval is too large, the magnetic field distribution cannot be detected more precisely,
therefore, the size and the number of the Hall sensors and the magnetic field distribution are determined in some embodiments of the invention by comprehensively considering the Hall sensors, the interval between two adjacent transverse Hall sensors 31 is 2-5 mm, the interval between two adjacent vertical Hall sensors 32 is 2-5 mm, and the Hall sensors can be smoothly installed and arranged in the interval, and the high-precision detection of the magnetic field can be smoothly completed.
Further, in some embodiments of the present invention, the hall sensor array 30 includes 24 lateral hall sensors 31 and 24 vertical hall sensors 32, and two adjacent vertical hall sensors 32 are spaced by 3.6 mm.
Specifically, the preset acquisition period needs to be set by comprehensively considering the bandwidth and magnetic field distribution of the collectors adopted by the hall sensor array 30, and under the condition that the running speed of the rail inspection vehicle is not changed, the shorter the preset acquisition period is, the higher the bandwidth of the collectors adopted by the hall sensor array 30 is required to be, and accordingly the cost is higher and higher, so that although the acquisition period is shorter, the acquisition accuracy is also improved, the bandwidth and the cost of the collectors are considered in practical application, and the acquisition period cannot be shortened without limit.
Further, considering the bandwidth and cost of the collector and the requirement for the detection precision of the magnetic field comprehensively, in some embodiments of the present invention, the hall sensor array 30 collects the magnetic field intensity data of the permanent magnet track according to a preset collection period, where the preset collection period is to detect every 10-50 mm along the extension direction of the permanent magnet track 10. Preferably, the preset acquisition period is detected every 20mm along the extension direction of the permanent magnet track 10.
Specifically, the distance between the hall sensor array 30 and the permanent magnet track 10 should match the levitation gap of the magnetic levitation vehicle, and if the difference between the distance between the hall sensor array 30 and the permanent magnet track 10 and the levitation gap of the magnetic levitation vehicle is too large or too small, the detected smoothness data will not reflect the actual levitation stability of the magnetic levitation vehicle, i.e. the smoothness data is meaningless data.
Specifically, the hall sensor array 30 and the permanent magnet track 10 are separated by 5-15 mm, and a user can adjust the height of the sensor support 20 according to actual detection requirements, so as to adjust the separation between the hall sensor array 30 and the permanent magnet track 10, preferably, in some embodiments of the present invention, the suspension gap of the magnetic levitation vehicle is 10mm, and the separation between the hall sensor array 30 and the permanent magnet track 10 is 15 mm.
Specifically, in order to ensure the working reliability of the data acquisition unit 40, the data acquisition unit 40 is arranged in an electric closed cabin and travels along with a driving mechanism, the data acquisition unit 40 is in communication connection with an upper computer 50 through a wireless communication network, and the upper computer 50 is usually arranged outside a vacuum track where the permanent magnet track 10 is arranged.
It should be noted that the determining, by the upper computer 50, whether the magnetic field strength of the permanent magnet track 10 is normal according to the magnetic field strength data and the preset magnetic field strength threshold range specifically includes:
receiving magnetic field intensity data transmitted by the data acquisition unit 40 and the point position of the permanent magnet track 10 corresponding to the magnetic field intensity data;
and comparing the magnetic field intensity data transmitted by the data acquisition unit 40 with a preset magnetic field intensity threshold, judging that the magnetic field of the point position of the permanent magnet track 10 is abnormal and giving an alarm when the magnetic field intensity data exceeds the preset magnetic field intensity threshold, and otherwise, judging that the magnetic field of the point position of the permanent magnet track 10 is normal.
For example, in some embodiments of the present invention, the preset threshold of the magnetic field strength is 0.35nT ± 0.5%, and at this time, when the upper computer 50 detects that the magnetic field strength data transmitted by the data acquisition unit 40 exceeds 0.35nT ± 0.5%, it will determine that the magnetic field at the point of the permanent magnet track 10 is abnormal and alarm.
Specifically, the determining, by the upper computer 50, whether the magnetic field strength of the permanent magnet track 10 is normal according to the magnetic field strength data and a preset magnetic field strength threshold specifically includes:
receiving magnetic field intensity data transmitted by a data acquisition unit 40 and the point position of the permanent magnet track 10 corresponding to the magnetic field intensity data;
drawing a magnetic field fluctuation curve according to the magnetic field intensity data and the point positions of the permanent magnet track 10 corresponding to each magnetic field intensity data;
determining the magnetic field fluctuation rate of the permanent magnet track 10 according to the magnetic field fluctuation curve and a preset magnetic field intensity threshold;
and comparing the magnetic field fluctuation rate of the permanent magnet track 10 with a preset fluctuation rate threshold, judging that the overall magnetic field intensity of the permanent magnet track 10 is not smooth when the magnetic field fluctuation rate exceeds the preset fluctuation rate threshold, and otherwise judging that the overall magnetic field intensity of the permanent magnet track 10 is smooth.
For example, in some embodiments of the present invention, the predetermined fluctuation ratio threshold is 5% (excluding the edge effect), and a magnetic field fluctuation diagram is drawn according to the detected magnetic field strength data, so that the magnetic field fluctuation ratio in the full track range relative to the permanent magnet track 10 can be obtained, and when the fluctuation ratio exceeds 5%, it can be determined that there is significant irregularity in the magnetic field of the permanent magnet track 10.
In summary, the present invention provides a system for detecting the irregularity of a magnetic field of a permanent magnet track, including: the device comprises a permanent magnet track, a sensor support connected with a driving mechanism arranged above the permanent magnet track, a Hall sensor array arranged on the sensor support, a data acquisition unit in communication connection with the Hall sensor array, and an upper computer in communication connection with the data acquisition unit, wherein the Hall sensor array and the permanent magnet track are mutually spaced; the sensor bracket is used for walking along the extension direction of the permanent magnet track along with the driving mechanism; the Hall sensor array is used for acquiring magnetic field intensity data of the permanent magnet track according to a preset acquisition cycle and transmitting the magnetic field intensity data to the data acquisition unit; the data acquisition unit is used for receiving magnetic field intensity data transmitted by the Hall sensor array and transmitting the magnetic field intensity data to an upper computer; the upper computer is used for determining whether the magnetic field intensity of the permanent magnet track is normal or not according to the magnetic field intensity data and a preset magnetic field intensity threshold value, can accurately detect the smoothness of the magnetic field of the permanent magnet track, and guarantees the running safety of the magnetic suspension train.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (10)
1. A permanent magnet track magnetic field irregularity detection system, comprising: the device comprises a permanent magnet track (10), a sensor support (20) connected with a driving mechanism arranged above the permanent magnet track (10), a Hall sensor array (30) arranged on the sensor support (20), a data acquisition unit (40) in communication connection with the Hall sensor array (30), and an upper computer (50) in communication connection with the data acquisition unit (40), wherein the Hall sensor array (30) and the permanent magnet track (10) are mutually spaced;
the sensor bracket (20) is used for walking along the extension direction of the permanent magnet track (10) along with the driving mechanism;
the Hall sensor array (30) is used for acquiring magnetic field intensity data of the permanent magnet track according to a preset acquisition cycle and transmitting the magnetic field intensity data to the data acquisition unit (40);
the data acquisition unit (40) is used for receiving magnetic field intensity data transmitted by the Hall sensor array (30) and transmitting the magnetic field intensity data to the upper computer (50);
and the upper computer (50) is used for determining whether the magnetic field intensity of the permanent magnet track (10) is normal or not according to the magnetic field intensity data and a preset magnetic field intensity threshold value.
2. The system for detecting the irregularity of the magnetic field of a permanent magnet track according to claim 1, wherein the hall sensor array (30) comprises a plurality of transverse hall sensors (31) arranged at intervals in sequence and a plurality of vertical hall sensors (32) arranged at intervals in sequence.
3. The permanent magnet track magnetic field irregularity detection system of claim 2 wherein the plurality of transverse hall sensors (31) are aligned in a width direction of the permanent magnet track (10);
the plurality of vertical Hall sensors (32) are arranged in another row parallel to the plurality of transverse Hall sensors (31) along the width direction of the permanent magnet track (10).
4. The system for detecting the irregularity of the magnetic field of the permanent magnet track according to claim 3, wherein the interval between two adjacent transverse Hall sensors (31) is 2-5 mm, and the interval between two adjacent vertical Hall sensors (32) is 2-5 mm.
5. The system for detecting the irregularity of the magnetic field of the permanent magnet track as claimed in claim 1, wherein the predetermined acquisition period is 10-50 mm apart along the extension direction of the permanent magnet track (10), and the hall sensor array (30) and the permanent magnet track (10) are 5-15 mm apart from each other.
6. The system for detecting the irregularity of a magnetic field in a permanent magnet track according to claim 1, wherein the data acquisition unit (40) is installed in an electrically sealed chamber and travels along with the driving mechanism.
7. The system for detecting the irregularity of the magnetic field of the permanent magnet track according to claim 1, wherein the determining, by the upper computer (50), whether the magnetic field strength of the permanent magnet track (10) is normal according to the magnetic field strength data and a preset threshold range of the magnetic field strength specifically comprises:
receiving magnetic field intensity data transmitted by a data acquisition unit (40) and point positions of the permanent magnet track (10) corresponding to the magnetic field intensity data;
and comparing the magnetic field intensity data transmitted by the data acquisition unit (40) with a preset magnetic field intensity threshold, judging that the magnetic field of the point position of the permanent magnet track (10) is abnormal and giving an alarm when the magnetic field intensity data exceeds the preset magnetic field intensity threshold, and otherwise, judging that the magnetic field of the point position of the permanent magnet track (10) is normal.
8. The system for detecting the irregularity of the magnetic field of the permanent magnet track according to claim 1, wherein the determining, by the upper computer (50), whether the magnetic field strength of the permanent magnet track (10) is normal according to the magnetic field strength data and a preset magnetic field strength threshold specifically comprises:
receiving magnetic field intensity data transmitted by a data acquisition unit (40) and point positions of a permanent magnet track (10) corresponding to the magnetic field intensity data;
drawing a magnetic field fluctuation curve according to the magnetic field intensity data and the point positions of the permanent magnet track (10) corresponding to the magnetic field intensity data;
determining the magnetic field fluctuation rate of the permanent magnet track (10) according to the magnetic field fluctuation curve and a preset magnetic field intensity threshold;
and comparing the magnetic field fluctuation rate of the permanent magnet track (10) with a preset fluctuation rate threshold, judging that the overall magnetic field intensity of the permanent magnet track (10) is not smooth when the magnetic field fluctuation rate exceeds the preset fluctuation rate threshold, and otherwise, judging that the overall magnetic field intensity of the permanent magnet track (10) is smooth.
9. The permanent magnet rail magnetic field irregularity detection system of claim 1 wherein the sensor mount (20) is decoupled from the drive mechanism.
10. The system of claim 1, wherein the drive mechanism is a rail inspection vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210000660.4A CN114002629A (en) | 2022-01-04 | 2022-01-04 | System for detecting irregularity of magnetic field of permanent magnet track |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210000660.4A CN114002629A (en) | 2022-01-04 | 2022-01-04 | System for detecting irregularity of magnetic field of permanent magnet track |
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| CN202210000660.4A Pending CN114002629A (en) | 2022-01-04 | 2022-01-04 | System for detecting irregularity of magnetic field of permanent magnet track |
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| CN114624637A (en) * | 2022-04-21 | 2022-06-14 | 西南交通大学 | Permanent magnet track three-dimensional magnetic field scanning device and scanning method thereof |
| CN116552598A (en) * | 2023-07-10 | 2023-08-08 | 西南交通大学 | Permanent magnet track irregularity detection device and method |
| CN117368812A (en) * | 2023-12-08 | 2024-01-09 | 西南交通大学 | Method and device for measuring magnetic field intensity of high-temperature superconductive magnetic levitation transportation system |
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Application publication date: 20220201 |