A vehicle positioning device and a maglev train

Abstract

This utility model discloses a vehicle positioning device and a magnetic levitation train, relating to the field of vehicle engineering technology. The vehicle positioning device includes: a track coding module, comprising coding strips; and an on-board detection module, comprising a coil probe. The on-board detection module is movable along a first direction, and during its movement, the coil probe, based on the eddy current detection principle, can acquire the position information formed by each coding strip in the track coding module when passing through it. The track coding module is fixed at a specific position on the track, and the on-board detection module is fixed to the vehicle. As the vehicle moves the on-board detection module along the first direction, the coil probe, using the eddy current detection principle, can detect changes in the eddy current field caused by the coding strips when passing through the track coding module, directly acquiring the position information carried by the coding strips of the track coding module, thereby more conveniently and accurately obtaining the absolute position of the vehicle.

Description

Technical Field

[0001] This utility model relates to the field of vehicle engineering technology, and in particular to a vehicle positioning device and a magnetic levitation train. Background Technology

[0002] Accurately determining the position of a rail vehicle during its movement is crucial for safe operation.

[0003] One current positioning method is radar speed measurement and positioning. This method can obtain the relative position of the vehicle, but it needs to be combined with other equipment to continuously correct the train's position information, making it difficult to guarantee positioning accuracy.

[0004] Therefore, how to obtain the absolute position of a vehicle more conveniently and accurately is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a vehicle positioning device that can more conveniently and accurately obtain the absolute position of a vehicle. Another purpose of this utility model is to provide a maglev train that includes the above-mentioned vehicle positioning device, which can more conveniently and accurately obtain the absolute position of the vehicle.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A vehicle positioning device includes: a track coding module including coding strips; and an on-board detection module including a coil probe. The on-board detection module is movable along a first direction, and during the movement, the coil probe can obtain the position information of each coding strip in the track coding module based on the eddy current detection principle when passing through the track coding module.

[0008] Preferably, a plurality of the track encoding modules are arranged sequentially at intervals along the first direction; wherein the number of encoding strips and / or the shape of at least one encoding strip of each track encoding module are different.

[0009] Preferably, the coding strip is a rectangular strip, and one of its width and length directions corresponds to a first direction, while the other corresponds to a second direction; or, the coding strip extends along the second direction, and its width is different in at least two intervals in the second direction and in the first direction.

[0010] Preferably, the coding strip is a metal strip.

[0011] Preferably, in the track encoding module, the two encoding bars at both ends in the first direction have different shapes and / or sizes.

[0012] Preferably, a plurality of track coding modules are arranged at intervals in the first direction; in each track coding module, the coding strips at the beginning of each track coding module are completely identical along the positive direction of the first direction, and the coding strips at the end of each track coding module are completely identical.

[0013] Preferably, the track encoding module is provided with a first number of detection areas in sequence along the second direction, the first number being ≥2 and a positive integer; the encoding strip is located in one or more of the detection areas; the coil probe includes the first number of coil probes arranged in sequence along the second direction, and during the movement of the vehicle-mounted detection module along the first direction, each coil probe detects each detection area in turn.

[0014] Preferably, at least one of the coding strips includes a plurality of rectangular sub-coding areas that are sequentially attached along the first direction. The width direction of the sub-coding area corresponds to the first direction, and the length direction corresponds to the second direction. At least two of the sub-coding areas cover different numbers of the detection areas in the second direction.

[0015] Preferably, the track encoding module includes a plurality of encoding bars, each encoding bar being arranged sequentially at intervals along the first direction; at least one encoding bar is a first encoding bar, and along one direction of the second direction, the width of the portion of the first encoding bar in each of the detection areas it passes through gradually decreases along the first direction; and / or, at least one encoding bar is a second encoding bar, and the width of the portion of the second encoding bar in at least two of the detection areas it passes through is the same along the first direction.

[0016] A magnetic levitation train includes a track and a vehicle; it also includes the vehicle positioning device described above, wherein the track encoding module is fixed on the track and the on-board detection module is fixed on the vehicle.

[0017] The vehicle positioning device provided by this utility model includes: a track coding module, including coding strips; and an on-board detection module, including a coil probe. The on-board detection module can move along a first direction, and during the movement, the coil probe can obtain the position information of each coding strip in the track coding module based on the eddy current detection principle when passing through the track coding module.

[0018] The aforementioned vehicle positioning device includes a track coding module and an on-board detection module, capable of obtaining the train's absolute position based on track coding. The track coding module is fixed at a specific position on the track, while the on-board detection module is fixed to the vehicle, such as a maglev train. As the vehicle moves the on-board detection module along a first direction, the coil probe, using the eddy current detection principle, detects changes in the eddy current field caused by the coding strip when passing the track coding module. This directly obtains the position information carried by the coding strip of the track coding module, ensuring the accuracy of the obtained absolute position information and enabling more convenient and accurate acquisition of the vehicle's absolute position. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the vehicle positioning device according to a specific embodiment of the present utility model;

[0021] Figure 2 This is a distribution diagram of the track encoding module on the track according to a specific embodiment of the present invention.

[0022] Figure label:

[0023] Vehicle 1;

[0024] Track 2;

[0025] Coil probe 3, first coil probe 31, second coil probe 32, third coil probe 33;

[0026] Vehicle-mounted detection module 4;

[0027] Track encoding module 5, encoding bar 51, first encoding bar 511, second encoding bar 512, frame header 513, frame tail 514, valid frame 515, detection area 52, sub-encoding area 53. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The core of this invention is to provide a vehicle positioning device that can more conveniently and accurately obtain the absolute position of a vehicle. Another core aspect of this invention is to provide a maglev train that includes the aforementioned vehicle positioning device, enabling more convenient and accurate acquisition of the vehicle's absolute position.

[0030] For a specific embodiment of the vehicle positioning device provided by this utility model, please refer to Embodiment 1. Figure 1 It includes a track coding module 5 and an on-board detection module 4. The track coding module 5 includes a coding strip 51. The on-board detection module 4 includes a coil probe 3.

[0031] Among them, the vehicle-mounted detection module 4 can move along the first direction X, and during the movement, the coil probe 3 can obtain the position information of each coding strip 51 in the track coding module 5 based on the eddy current detection principle when passing the track coding module 5.

[0032] In this context, the first direction X corresponds to the extension direction of track 2 and the travel direction of the vehicle. It should be noted that when the track encoding module 5 is located in the straight extension area of ​​track 2, the first direction X specifically corresponds to the extension direction of the straight line; when the track encoding module 5 is located in the curved extension area of ​​track 2, the first direction X specifically corresponds to the tangent of the curve. The second direction Y corresponds to the width direction of track 2. Typically, the first direction X and the second direction Y are perpendicular.

[0033] Specifically, the coil probe 3 includes an induction coil, which uses the eddy current detection principle to transmit and read back the information corresponding to the coded strips 51 arranged on the track 2. The coil probe 3 specifically includes a transmitting coil and a receiving coil. When working, the transmitting coil is energized to generate an alternating magnetic field, which acts on the coded strips 51 of the track coding module 5. Based on the eddy current detection principle, the magnetic field strength or direction will change. The receiving coil detects the change in the magnetic field and outputs an analog signal formed by the combination of all the coded strips 51 in the track coding module 5, thereby obtaining the absolute position information corresponding to the analog signal.

[0034] The vehicle positioning device in this embodiment includes a track coding module 5 and an on-board detection module 4, which can obtain the absolute position of the train based on track coding. The track coding module 5 is fixed at a specific position on the track 2, and the on-board detection module 4 is fixed to the vehicle 1, such as a maglev train. As the vehicle 1 moves the on-board detection module 4 along the first direction X, the coil probe 3, when passing the track coding module 5, can detect changes in the eddy current field caused by the coding strip 51 using the eddy current detection principle. This directly obtains the position information carried by the coding strip 51 of the track coding module 5, ensuring the accuracy of the obtained absolute position information and enabling more convenient and accurate acquisition of the absolute position of the vehicle 1.

[0035] Furthermore, such as Figure 2As shown, multiple track coding modules 5 are arranged sequentially at intervals along the first direction X. At this time, the coding strips 51 in each track coding module 5 are combined to form different position information, which are then used for the separate positioning of the vehicle at different positions.

[0036] In some embodiments, at least two track encoding modules 5 have different numbers of encoding bars 51. In this case, because there are intervals between the different encoding bars 51 in the track encoding module 5, the coil probe 3 can detect the encoding bars 51 at intervals, forming pulse-like information. Therefore, by the difference in number, at least partially different track encoding modules 5 can be distinguished. For example, as... Figure 1 As shown, some track coding modules 5 have 4 coding bars 51, while others have 5 coding bars 51. These two types of track coding modules 5 can be distinguished by the number of coding bars 51, and further distinguished by other features of the coding bars 51 in each type of track coding module 5. Alternatively, the coding bars 51 of all track coding modules 5 can be set to be different, in which case each coding bar 51 can be completely identical.

[0037] In some embodiments, at least one coding bar 51 of the track coding module 5 has a different shape and / or size than the coding bars 51 of other track coding modules 5. By setting at least one unique coding bar 51 in each track coding module 5, the uniqueness of the track coding module 5 is achieved.

[0038] In some embodiments, two track encoding modules 5 are included, in which the encoding bars 51 in one track encoding module 5 are reordered along the first direction X, and the arrangement of the encoding bars 51 in the other track encoding module 5 is the same, so that different track encoding modules 5 can be set by the arrangement method.

[0039] In the track encoding module 5, regarding the shape setting of the encoding strip 51, the encoding strip 51 can be a rectangular strip, with its width and length directions corresponding to either the first direction X or the second direction Y, as shown below. Figure 1 The coded bar C in the middle facilitates processing.

[0040] Or, as Figure 1 The coding strips A, B, and D are included. The coding strip 51 extends along the second direction Y, and its width is different in at least two intervals in the second direction Y in the first direction X. By adjusting its width at different positions in the second direction Y, the coding strip 51 can be set in different shapes, which is convenient for processing.

[0041] Of course, in other embodiments, the coding strip 51 may also be an elliptical piece, or the coding strip 51 may include a plurality of circular pieces arranged along the second direction Y, or other shapes.

[0042] Alternatively, the coding strip 51 can be a metal strip, such as aluminum or copper, for ease of processing. In this case, the metal strip can cooperate with the coil probe 3. As the coil probe 3 passes through the track coding module 5, the presence or absence of the metal strip in the track coding module 5 above or below the coil probe 3 changes, altering the magnetic field strength or direction and changing the eddy current distribution. Consequently, the coil probe 3 can output a corresponding analog signal based on the received magnetic field changes, which, after decoding by the processor, allows the reader to read the vehicle's current absolute position information. Of course, in other embodiments, the coding strip 51 can also employ other magnetic flux modulators.

[0043] Furthermore, to identify the vehicle's direction of travel using the track coding module 5, the two coding bars 51 at both ends in the first direction X of the track coding module 5 have different shapes and / or sizes. In this case, the coding bars 51 at both ends of the track coding module 5 can be used to distinguish the direction of travel of the vehicle 1, for example, by... Figure 1 For example, along the positive direction of the first direction X, the first encoding bar 51 of the track encoding module 5 is the frame header 513, specifically encoding bar A, and the last encoding bar 51 of the track encoding module 5 is the frame tail 514, specifically encoding bar D. During the movement of vehicle 1, if the on-board detection module 4 passes through encoding bar A first and then through encoding bar D last, it is determined that vehicle 1 is moving in the positive direction of the first direction X; if it passes through encoding bar D first and then through encoding bar A last, it is determined that vehicle 1 is moving in the negative direction of the first direction X.

[0044] In some embodiments, for different track coding modules 5, the coding strip 51 used to distinguish the direction of travel of vehicle 1 can be set to be the same. Specifically, in each track coding module 5, along the positive direction in the first direction X, the coding strip 51 at the beginning of each track coding module 5 is exactly the same, and the coding strip 51 at the end of each track coding module 5 is exactly the same. Figure 1 For example, along the positive direction of the first direction X, the encoding bar 51 at the beginning of each track encoding module 5 is a frame header 513, and all frame headers 513 are the same and are encoding bar A. The encoding bar 51 at the end of each track encoding module 5 is a frame tail 514, and all frame tails 514 are the same and are encoding bar D. At this time, encoding bar A serves as the frame header 513 of each track encoding module 5, and encoding bar D serves as the frame tail 514 of each track encoding module 5. By passing through the frame header 513 and frame tail 514 of a track encoding module 5 in sequence, the vehicle 1 can determine its direction of travel when it moves to any track encoding module 5.

[0045] Furthermore, in each track encoding module 5, the encoding bars 51 at both ends in the first direction X are different from the other encoding bars 51. Therefore, the track encoding module 5 does not have any other combination identical to the combination of the encoding bars 51 at both ends. In this case, the combination of the frame header 513 and frame tail 514 can be used to distinguish when the vehicle 1 has moved to different track encoding modules 5. It should be noted that the difference in encoding bars 51 mainly refers to the different information read by the coil probe 3. For example, in some embodiments, different encoding bars 51 are set so that they do not overlap after translation along the first direction X.

[0046] Based on this, in each track coding module 5, apart from the frame header 513 and frame tail 514, the remaining coding bars 51 can be used as valid frames 515. The absolute positioning of vehicle 1 is achieved by combining the unique coding information formed by the combination of each valid frame 515 in the track coding module 5. In addition, after the on-board detection module 4 passes through the frame header 513 or frame tail 514, the accuracy of code reading can be guaranteed by identifying the start of the valid frame 515 and the travel trajectory of the metal-covered coil. This overcomes problems such as code loss and mechanical interference of the positioning device, thereby achieving the effects of signal safety and controllability and low design cost.

[0047] Furthermore, to facilitate the provision of different information by each coded bar 51, such as Figure 1 As shown, in the track encoding module 5, a first number of detection areas 52 are sequentially arranged along the second direction Y, where the first number is ≥2 and is a positive integer. An encoding strip 51 covers one or more detection areas 52. The coil probes 3 include a first number of coil probes 3 arranged sequentially along the second direction Y, and during the movement of the vehicle-mounted detection module 4 along the first direction X, each coil probe 3 detects each detection area 52 in a one-to-one correspondence.

[0048] For example, the first quantity is 3, and the 3 coil probes 3 are respectively the first coil probe 31, the second coil probe 32 and the third coil probe 33; in other embodiments, the first quantity can also be set to more than 3, such as 5, depending on the quantity requirements of the vehicle detection module 4.

[0049] At this time, each coil probe 3 can detect the presence or absence of each coding strip 51 in a single detection area 52 and its length along the first direction X, respectively, to obtain different pulse width or time width information, so as to obtain different coding information.

[0050] In addition, the coil probe 3 and the coding strip 51 extend or are arranged along the first direction X and the second direction Y, which is not affected by the vertical mechanical structure. The coding strip 51 and the coil probe 3 can be arranged along the vertical direction. Furthermore, by reasonably setting the correspondence between the coil probe 3 and the coding strip 51 in the horizontal direction, the absolute position of vehicle 1 can be effectively detected in both the vehicle 1 landing and floating states. This can effectively avoid the probability of code loss due to the gap fluctuation of vehicle 1 during high-speed operation, improve the reliability and security of code reading, and achieve safe and efficient operation of vehicle 1.

[0051] For example, when applied to rail vehicles, the on-board detection module 4 is fixed to the bottom of vehicle 1, and the track coding module 5 is fixed to the top of track 2, so that the on-board detection module 4 performs detection over each track coding module 5. Alternatively, in a maglev train, the track coding module 5 can also be fixed to the bottom of track 2, while the on-board detection module 4 is fixed to the top surface of the structure at the bottom of vehicle 1 that surrounds track 2. In this case, each track coding module 5 can correspond to a selected position on track 2, and the on-board detection module 4 can read the information from each track coding module 5 when moving to different positions to locate vehicle 1 accordingly.

[0052] In some embodiments, each coil probe 3 is uniformly arranged along the second direction Y. Correspondingly, each detection area 52 is also uniformly arranged along the second direction Y in the track encoding module 5, which can reduce the processing or partitioning difficulty of the coil probe 3 and the detection area 52.

[0053] In some embodiments, such as Figure 1 As shown, each coding strip 51 in the track coding module 5 extends from a detection area 52 at the same end in the second direction Y to the other end. (Reference) Figure 1 The orientation of the second direction Y corresponds to the up and down direction shown in the figure. Each coding strip 51 in the track coding module 5 extends from the top detection area 52 shown in the figure to the bottom. At this time, by extending the length of each coding strip 51 differently, coding strips 51 of different shapes are formed. Thus, the regularity of each coding strip 51 in the same track coding module 5 is strong, which is convenient for processing.

[0054] In some embodiments, to achieve different widths in different areas of the coding strip 51 along the first direction X, at least one coding strip 51 includes a plurality of rectangular sub-coding regions 53 sequentially attached along the first direction X. The width direction of the sub-coding regions 53 corresponds to the first direction X, and the length direction corresponds to the second direction Y. At least two sub-coding regions 53 cover different numbers of detection regions 52 in the second direction Y. In this case, by setting the length of the coding strip 51 along the second direction Y at different positions in the first direction X, different shapes of the coding strip 51 are achieved to form different encoded information.

[0055] by Figure 1For example, code bar B includes two sub-coding areas 53, which pass through two detection areas 52 and one detection area 52 respectively; code bar C includes only one sub-coding area 53, which passes through only one detection area 52; or code bar D includes three sub-coding areas 53, which pass through one detection area 52, three detection areas 52 and three detection areas 52 respectively.

[0056] When setting different coding bars 5, the following factors are considered: whether the coding bar 51 passes through each detection area 52 in the second direction Y, and the width of the coding bar 51 along the first direction X in each detection area 52, to form different coding bars 51. Based on the quantity requirements of the track coding modules 5, different valid frames 515 and combinations of valid frames 515 are set to provide different positioning information and achieve the absolute positioning requirements of the vehicle 1 at different locations.

[0057] In some embodiments, such as Figure 1 As shown, the track encoding module 5 includes a first encoding strip 511 and a second encoding strip 512. By setting the width of the first encoding strip 511 and the second encoding strip 512 at different positions along the first direction X in the second direction Y, the shape or size of the encoding strip 51 can be adjusted to form different encoded information.

[0058] like Figure 1 As shown, its track encoding module 5 includes three first encoding strips 511, namely encoding strip A, encoding strip B, and encoding strip C. In the first encoding strip 511, along one direction of the second direction Y, the width of the portion of the first encoding strip 511 in each detection area 52 it passes through gradually decreases along the first direction X, so that each coil probe 3 can read different information by setting different widths.

[0059] like Figure 1 As shown, its track encoding module 5 includes a second encoding strip 512, namely encoding strip D. The second encoding strip 512 has the same width along the first direction X in the portions of at least two detection areas 52 it passes through. In encoding strip D, the portions of the second encoding strip 512 in two detection areas 52 have the same width along the first direction X, while the portion of the second encoding strip 512 in another detection area 52 has a width greater than the first width value along the first direction X. The information of the current encoding strip 51 can be determined by comparing the detection information of different coil probes 3.

[0060] In this embodiment of the application, the working principle of the vehicle positioning device is as follows: Figure 1Taking this as an example, the vehicle's direction of travel is first identified: coded bar A is the frame header 513, and coded bar D is the frame tail 514. When the vehicle-mounted detection module 4 passes the track coding module 5, the pulse widths of the coded bars 51 detected by each coil probe 3 are different. Based on the different pulse widths and / or comparisons with the pulse widths detected by adjacent coil probes 3, the frame header 513 or the frame tail 514 can be identified, thereby identifying the vehicle's direction of travel. Specifically, when the coil probe 3 detects coded bar A, the pulse widths of the information acquired by the first coil probe 31, the second coil probe 32, and the third coil probe 33 decrease sequentially; when passing coded bar D, among the information acquired by the first coil probe 31, the second coil probe 32, and the third coil probe 33, the pulse width detected by the first coil probe 31 is the largest, while the pulse widths detected by the second coil probe 32 and the third coil probe 33 are the same and smaller than those of the first coil probe 31.

[0061] After identifying the frame header 513 and frame tail 514 to determine the vehicle's direction of travel, subsequent valid frames 515 can be read to identify the absolute position of vehicle 1. Among these, coded bars B and C are valid frames 515. Coded bar B is logic 1, and coded bar C is logic 0. When passing through coded bars B and C, only the first coil probe 31 can identify coded bar C, and only the first coil probe 31 and the second coil probe 32 can identify coded bar B. Furthermore, the pulse widths of the identified bars are different. Combining the direction of travel with the detected combination of coded bars B and C, the track encoding module 5 can be identified, and the current position of the vehicle can be accurately determined.

[0062] The vehicle positioning device provided in this embodiment utilizes the eddy current detection principle and a specially defined encoding method. By setting a track encoding module 5 at a specific track 2 position, including different encoding bars 51 such as frame header 513, frame tail 514, and effective frame 515, the device reads the codes through the on-board detection module 4 installed on the vehicle 1 to obtain the encoding information of the track encoding module 5, and analyzes the corresponding absolute position information to achieve safe and reliable absolute positioning of the vehicle 1. It can also reliably read the train running direction and absolute position code.

[0063] In addition to the aforementioned vehicle positioning device, this utility model also provides a maglev train, which includes a vehicle positioning device. Specifically, the vehicle positioning device can be any of the vehicle positioning devices provided in the above embodiments, and the beneficial effects can be referred to the respective embodiments above. The maglev train also includes a track 2 and a vehicle 1. The track encoding module 5 is fixed on the track 2, and the on-board detection module 4 is fixed on the vehicle 1.

[0064] It should be noted that when an element is referred to as "fixing" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as "connecting" another element, it can be directly connected to the other element or there may be an intervening element. Furthermore, in the description of this utility model, unless otherwise stated, "multiple," "multiple roots," and "multiple groups" mean two or more.

[0065] The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0067] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0068] The magnetic levitation train and vehicle positioning device provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A vehicle positioning apparatus characterized by comprising: include: Track coding module (5), including coding bar (51); The vehicle-mounted detection module (4) includes a coil probe (3); The vehicle-mounted detection module (4) can move along the first direction (X), and during the movement, the coil probe (3) can obtain the position information of each of the coding strips (51) in the track coding module (5) based on the eddy current detection principle when passing the track coding module (5).

2. The vehicle positioning apparatus according to claim 1, characterized by Multiple track coding modules (5) are arranged sequentially at intervals along the first direction (X). All the coding strips (51) in each track coding module (5) are combined to form different position information.

3. The vehicle positioning apparatus according to claim 1, characterized by The coding bar (51) is a rectangular bar, and one of its width and length directions corresponds to the first direction (X), and the other corresponds to the second direction (Y). Alternatively, the coding strip (51) extends along the second direction (Y), and at least two intervals of it in the second direction (Y) have different widths in the first direction (X).

4. The vehicle positioning apparatus according to claim 1, characterized by The coding strip (51) is a metal strip.

5. The vehicle positioning apparatus according to claim 1, characterized by In the track encoding module (5), the two encoding bars (51) at both ends in the first direction (X) have different shapes and / or sizes.

6. The vehicle positioning apparatus according to claim 5, characterized by Multiple track coding modules (5) are arranged sequentially at intervals along the first direction (X); in each track coding module (5), along the positive direction of the first direction (X), the coding strips (51) at the beginning of each track coding module (5) are completely the same, and the coding strips (51) at the end of each track coding module (5) are completely the same.

7. The vehicle positioning apparatus according to any one of claims 1 to 6, characterized by The track encoding module (5) is provided with a first number of detection areas (52) along the second direction (Y), wherein the first number is ≥2 and is a positive integer; The coding strip (51) covers one or more of the detection areas (52); The coil probe (3) includes a first number of coil probes (3) arranged sequentially along the second direction (Y), and during the movement of the vehicle-mounted detection module (4) along the first direction (X), each coil probe (3) detects each detection area (52) in turn.

8. The vehicle positioning apparatus according to claim 7, characterized by At least one of the coding strips (51) includes a plurality of rectangular sub-coding areas (53) arranged in sequence along the first direction (X). The width direction of the sub-coding area (53) corresponds to the first direction (X) and the length direction corresponds to the second direction (Y). At least two of the sub-coding areas (53) cover different numbers of the detection areas (52) in the second direction (Y).

9. The vehicle positioning device according to claim 7, characterized in that, The track coding module (5) includes a plurality of coding strips (51), and each coding strip (51) is arranged sequentially at intervals along the first direction (X); At least one of the coding bars (51) is a first coding bar (511), and along one direction in the second direction (Y), the width of the first coding bar (511) in each of the detection areas (52) it passes through gradually decreases along the first direction (X); And / or, at least one of the coding bars (51) is a second coding bar (512), the second coding bar (512) having the same width along the first direction (X) in portions of the at least two detection areas (52) it passes through.

10. A magnetic levitation train characterized by comprising: It includes a track (2) and a vehicle (1); it also includes a vehicle positioning device according to any one of claims 1 to 9, wherein the track coding module (5) is fixed on the track (2) and the vehicle detection module (4) is fixed on the vehicle (1).

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