Transmission line
By designing a specific arrangement of eddy current target array and detection coil in the transmission line, the problem of inaccurate mover position detection in the arc segment was solved, and precise control of the mover was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-19
- Publication Date
- 2026-03-13
AI Technical Summary
The existing transmission line cannot achieve real-time and accurate detection of the mover position in the curved section, resulting in inaccurate stator control.
The stator and mover structure is designed, including straight segments and arc segments. First and second detection coils and eddy current target arrays are set respectively. By using different lengths and arrangements of the eddy current target array and detection coils, the first and second periodic position signals can be detected during the movement of the mover. The absolute position of the mover is determined by using the phase difference.
It enables precise detection of the mover position in both curved and straight segments, ensuring that the stator can control the mover's movement in a timely and accurate manner.
Smart Images
Figure CN121663911A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of transmission technology, and more particularly to a transmission line. Background Technology
[0002] In a transmission line, the stator needs to drive the mover to move, and the position of the mover also needs to be detected in real time in order to control the mover's movement accurately and in a timely manner.
[0003] In existing transmission lines, the position of the moving part can be detected in the straight section. However, transmission lines generally also have curved sections. When the moving part moves in the curved section or between the curved and straight sections, if the detection structure of the curved section is set up in the same way as that of the straight section, it is impossible to achieve real-time and accurate detection of the moving part's position. Summary of the Invention
[0004] This invention provides a transmission line that can accurately detect the absolute position of the arc segment in the transmission line to the mover, so as to achieve accurate and timely control of the stator.
[0005] In a first aspect, a transmission line is provided, comprising: The stator includes a straight segment and an arc segment, each of which includes a drive coil and a detection component. Each detection component includes a first detection coil and a second detection coil. The mover includes a magnet array, a first eddy current target array, and a second eddy current target array. The driving coil can drive the magnet array to move so that the mover moves along the transmission direction. The first eddy current target array includes a plurality of first eddy current targets, and the second eddy current target array includes a plurality of second eddy current targets. Wherein, the first detection coil corresponds to detecting the first eddy current target piece, and the second detection coil corresponds to detecting the first eddy current target piece. The length of at least a portion of the first eddy current target pieces is shorter than the length of at least a portion of the second eddy current target pieces. During the movement of the mover, any first eddy current target piece can correspond to the midpoint of all the first detection coils and will not correspond to any second detection coil. Similarly, any second eddy current target piece can correspond to the midpoint of all the second detection coils and will not correspond to any first detection coil.
[0006] Optionally, in any of the detection components, the first detection coil and the second detection coil are parallel and aligned, the first eddy current target array and the second eddy current target array are parallel and centered, and the number of first eddy current targets in the first eddy current target array is greater than the number of second eddy current targets in the second eddy current target array; and / or, The length of the first eddy current target array is greater than the length of the midpoint between any two adjacent first detection coils, and the length of the second eddy current target array is greater than the length between any two adjacent second detection coils.
[0007] Optionally, the outer sides of all the first eddy current targets in the first eddy current target array are aligned, and the inner sides of all the first eddy current targets in the second eddy current target array are aligned; in the first eddy current target array, the width of the first eddy current target from the edge to the middle gradually increases in the direction perpendicular to the transmission direction until the width of the first eddy current target reaches a first preset standard value; in the second eddy current target array, the width of the second eddy current target from the edge to the middle gradually decreases until the width of the second eddy current target reaches a second preset standard value.
[0008] Optionally, when the width of the first eddy current target reaches a first preset standard value and the width of the corresponding second eddy current target reaches a second preset standard value, the spacing between the first eddy current target and the corresponding second eddy current target in the direction perpendicular to the transmission direction is 0; when the width of the first eddy current target does not reach the first preset standard value and the width of the corresponding second eddy current target does not reach the second preset standard value, the spacing between the first eddy current target and the corresponding second eddy current target in the direction perpendicular to the transmission direction is the same.
[0009] Optionally, during the process from the edge to the center, the rate of change of the difference between the width of the first eddy current target plate perpendicular to the transmission direction and the first preset standard value is greater than the rate of change of the difference between the width of the second eddy current target plate perpendicular to the transmission direction and the second preset standard value during the process from the edge to the center.
[0010] Optionally, the width of the first eddy current target perpendicular to the transmission direction is not less than the width of the first detection coil; the width of the second eddy current target perpendicular to the transmission direction is not less than the width of the second detection coil.
[0011] Optionally, each straight line segment or arc segment is provided with a circuit board, and the detection component is disposed on the circuit board.
[0012] Optionally, the detection component is provided at the first end of the circuit board; or the detection component is provided at the last end of the circuit board.
[0013] Optionally, the first eddy current target array extends inward from the first detection coil in a portion perpendicular to the transmission direction; The second eddy current target array extends outward from the second detection coil in a portion perpendicular to the transmission direction.
[0014] Optionally, the arc segment has a transition region at one end that connects with the straight segment, and at least one set of detection components is provided in the transition region, wherein the drive coil and the detection components in the transition region are arranged along a straight line.
[0015] The aforementioned transmission line includes a stator and a mover. The stator includes a straight segment and an arc segment, both of which include a drive coil and a detection component. Each detection component includes a first detection coil and a second detection coil. The mover includes a magnet array, a first eddy current target array, and a second eddy current target array. The drive coil can drive the magnet array to move, causing the mover to move along the transmission direction. The first eddy current target array includes multiple first eddy current targets, and the second eddy current target array includes multiple second eddy current targets. The first detection coil detects the first eddy current target, and the second detection coil detects the first eddy current target. At least some of the first eddy current target's length is shorter than at least some of the second eddy current target's length. During the mover's movement, any first eddy current target can correspond to the midpoint of all first detection coils but not to any second detection coil, and any second eddy current target can correspond to the midpoint of all second detection coils but not to any first detection coil. In this scheme, a first eddy current target array and a second eddy current target array are employed, with at least a portion of the first eddy current target arrays having a shorter length than at least a portion of the second eddy current target arrays. During the movement of the mover, any first eddy current target array can correspond to the midpoint of all first detection coils but not to any second detection coil, and any second eddy current target array can correspond to the midpoint of all second detection coils but not to any first detection coil. This ensures that when the mover passes through an arc segment, the first detection coils can accurately detect the first eddy current target arrays, generating a first periodic position signal, and the second detection coils can accurately detect the second eddy current target arrays, generating a second periodic position signal. By setting the length of at least a portion of the first eddy current target arrays to be shorter than the length of at least a portion of the second eddy current target arrays, a phase difference between the first and second periodic position signals can be ensured, thereby allowing the absolute position of the mover to be determined based on the first and second periodic position signals. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a partial structural diagram of a transmission line in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the mover in one embodiment of the present invention; Figure 3 This is a partial structural diagram of a straight segment of a transmission line in one embodiment of the present invention; Figure 4 This is a structural diagram of the curved segment of the transmission line in one embodiment of the present invention; Figure 5 This is a partial structural diagram of a transmission line in one embodiment of the present invention. Detailed Implementation
[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Please see Figures 1-5 , Figures 1-5 This is a schematic diagram of a transmission line provided in an embodiment of the present invention. The transmission line includes: a stator 10, a mover 20, and a processing module (not shown).
[0020] Among them, such as Figure 1 As shown, the stator 10 includes a straight segment 110 and an arc segment 120. Both the straight segment 110 and the arc segment 120 include a drive coil and a detection component. Each detection component includes a first detection coil 121 and a second detection coil 122. The mover 20 includes a magnet array 21, a first eddy current target array 22, and a second eddy current target array 23. A driving coil can drive the magnet array 21 to move, so that the mover 20 moves along the transmission direction. The first eddy current target array 22 includes multiple first eddy current targets 221, and the second eddy current target array 23 includes multiple second eddy current targets 231. The first detection coil 121 detects the first eddy current target 221, and the second detection coil 122 detects the second eddy current target 231. The length of at least a portion of the first eddy current targets 221 is shorter than the length of at least a portion of the second eddy current targets 231. During the movement of the mover, any first eddy current target 221 can correspond to the midpoint of all first detection coils 121, but will not correspond to any second detection coil 122. Similarly, any second eddy current target 231 can correspond to the midpoint of all second detection coils 122, but will not correspond to any first detection coil 121.
[0021] Specifically, the driving coil can drive the magnet array 21 to move, so that the mover 20 moves along the transmission direction (consistent with the length direction). The first eddy current target array 22 includes multiple first eddy current targets 221, and the second eddy current target array 23 includes multiple second eddy current targets 231. The lengths of the first eddy current targets 221 and the second eddy current targets 231 are different. The first detection coil 121 can emit a first magnetic field, and the first eddy current targets 221 can generate a second magnetic field under the excitation of the first magnetic field. The first detection coil 121 can sense the first superimposed total field formed by the first magnetic field and the second magnetic field to generate a first voltage signal. The second detection coil 122 can emit a third magnetic field, and the second eddy current target 231 can generate a fourth magnetic field under the excitation of the third magnetic field. The second detection coil 122 can sense the second superimposed total field formed by the first magnetic field and the second magnetic field to generate a second voltage signal. The processing module can be used to acquire the first voltage signal and the second voltage signal generated by the same detection component when the mover 20 moves along the transmission direction; determine the first periodic position signal according to the first voltage signal, and determine the second periodic position signal according to the second voltage signal; determine the absolute position of the mover 20 according to the first periodic position signal and the second periodic position signal.
[0022] Each first eddy current target 221 can correspond to the midpoint of all first detection coils 121 and will not correspond to any second detection coil 122. Similarly, each second eddy current target can correspond to the midpoint of all second detection coils 122 and will not correspond to any first detection coil 121. This ensures that when the mover passes through the arc segment, the first detection coil 121 can accurately detect the first eddy current target 221 and generate a first periodic position signal, and the second detection coil 122 can accurately detect the second eddy current target 231 and generate a second periodic position signal.
[0023] This scheme employs a first eddy current target array 22 and a second eddy current target array 23. The eddy current targets can generate eddy currents due to the magnetic field. The eddy currents inversely affect (weaken) the original magnetic field emitted by the detection coil, thereby enabling the detection coil to detect the change in magnetic field and obtain the first voltage signal and the second voltage signal. These signals are then processed to obtain the first periodic position signal and the second periodic position signal. One eddy current target corresponds to one periodic position signal. Based on the same periodic position signal, the displacement increment of the mover can be determined. Since the lengths of the first eddy current target 221 and the second eddy current target 231 are different, the first periodic position signal and the second periodic position signal have a phase difference. Therefore, the absolute position of the mover 20 can be determined based on the first periodic position signal and the second periodic position signal with the phase difference.
[0024] In one embodiment, the first detection coil 121 and the second detection coil 122 in any detection component are parallel and aligned, the first eddy current target array 22 and the second eddy current target array 23 are parallel and centered, and the number of first eddy current target plates 221 in the first eddy current target array 22 is greater than the number of second eddy current target plates 231 in the second eddy current target array 23.
[0025] Since the first detection coil 121 and the second detection coil 122 cannot be used to detect the absolute position of the mover when they are staggered, it is beneficial to increase the effective detection range by aligning the first detection coil 121 and the second detection coil 122 in parallel.
[0026] By ensuring that the number of first eddy current target plates 221 is greater than the number of second eddy current target plates 231, and that the length of at least a portion of the first eddy current target plates 221 is shorter than the length of at least a portion of the second eddy current target plates 231, it is possible to ensure that the first periodic position signal and the second periodic position signal have a phase difference, thereby enabling the absolute position of the mover 20 to be determined directly by the first periodic position signal and the second periodic position signal.
[0027] Optionally, the length of the first eddy current target array 22 is greater than the length of the midpoint between any two adjacent first detection coils 121, and the length of the second eddy current target array 23 is greater than the length between any two adjacent second detection coils 122. During the movement of the mover, the center position of any first detection coil 121 can correspond vertically to all first eddy current target arrays 22. Similarly, the center position of any second detection coil 122 can correspond vertically to all second eddy current target arrays 23, so as to ensure that whether it is a straight line segment 110 or an arc segment 120, when the mover leaves the previous detection component, the next detection component has already detected the position of the mover.
[0028] Optionally, the outer sides of all the first vortex target plates 221 in the first vortex target plate array 22 are aligned, and the inner sides of all the second vortex target plates 231 in the second vortex target plate array 23 are aligned; in the first vortex target plate array 22, the width of the first vortex target plate 221 gradually increases from the edge to the middle, until the width of the first vortex target plate 221 reaches a first preset standard value; in the second vortex target plate array 23, the width gradually decreases from the edge to the middle, until it reaches a second preset standard value, so that the first periodic position signal and the second periodic position signal have a phase difference, so that the absolute position of the mover 20 can be determined based on the first periodic position signal and the second periodic position signal with a phase difference.
[0029] It should be noted that the terms "inner side" and "outer side" in this application are defined with reference to the curvature direction of the arc segment. "Inner side" corresponds to the side of the arc segment facing the center of curvature, and "outer side" corresponds to the side of the arc segment away from the center of curvature, but this is not a limitation.
[0030] like Figure 2 As shown, the length direction is consistent with the transmission direction of the straight line segment, and the width direction is perpendicular to the transmission direction of the straight line segment. All the first eddy current targets 221 of the first eddy current target array 22 are arranged at intervals along the length direction. In the width direction, the width of the first eddy current target at the edge is smaller, and the width of the first eddy current target in the middle is larger, and the width gradually increases from the edge to the middle until the width of the first eddy current target 221 reaches the first preset standard value. The width of the first eddy current target 221 will not increase further. That is to say, the maximum width of the first eddy current target 221 is the first preset standard value. All the second eddy current targets 231 of the second eddy current target array 23 are arranged at intervals along the transmission direction. In the width direction, the width of the first eddy current target at the edge is larger, and the width of the first eddy current target in the middle is smaller, and the width gradually decreases from the edge to the middle until the width of the second eddy current target 231 reaches the second preset standard value. The width of the second eddy current target 231 will not decrease further. That is to say, the minimum width of the second eddy current target 231 is the second preset standard value.
[0031] Optionally, when the width of the first eddy current target 221 reaches a first preset standard value and the width of the corresponding second eddy current target 231 reaches a second preset standard value, the spacing between the first eddy current target 221 and the corresponding second eddy current target 231 in the width direction is 0; when the width of the first eddy current target 221 does not reach the first preset standard value and the width of the corresponding second eddy current target 231 does not reach the second preset standard value, the spacing between the first eddy current target 221 and the corresponding second eddy current target 231 in the width direction is the same, which can prevent interference between the magnetic fields generated by the non-corresponding second eddy current target 231 and the first eddy current target 221.
[0032] In one embodiment, during the process from the edge to the center, the rate of change of the difference between the width of the first eddy current target 221 and the first preset standard value is greater than the rate of change of the difference between the width of the second eddy current target 231 and the second preset standard value during the process from the edge to the center. This enables the first periodic position signal and the second periodic position signal to have a phase difference, thereby enabling the absolute position of the mover 20 to be determined based on the first periodic position signal and the second periodic position signal with a phase difference.
[0033] In one embodiment, the width of the first eddy current target 221 is not less than the width of the first detection coil 121; the width of the second eddy current target 231 is not less than the width of the second detection coil 122, thereby improving the sensitivity of the detection coil, ensuring that the first eddy current target array 22 can be detected by the first detection coil 121, and ensuring that the second eddy current target array 23 can be detected by the second detection coil 122.
[0034] In one embodiment, each straight segment 110 or arc segment 120 is provided with a circuit board 30, and a detection component is disposed on the circuit board 30, thereby ensuring that the circuit boards of the straight segment 110 and arc segment 120 can be adapted and installed with the corresponding stator.
[0035] In one implementation, such as Figure 1 and Figure 3 As shown, a detection component is provided at the beginning of the circuit board 30; and / or, a detection component is provided at the end of the circuit board 30. A detection component is provided at the beginning of each circuit board 30 to ensure that the position of the mover 20 can be detected immediately when it enters the straight / arc segment where the circuit board 30 is located, and the drive coil in the same straight / arc segment can be controlled in a timely manner based on the position of the mover. A detection component is provided at the end of each circuit board 30 to ensure that the detection component on the circuit board can always detect the position of the mover when the mover has not completely left the straight / arc segment where the circuit board is located, and the drive coil in the same straight / arc segment can be controlled in a timely manner based on the position of the mover, thereby ensuring that the mover detection and stator control can be accurately performed at each position of the transmission line.
[0036] It should be noted that the beginning of circuit board 30 refers to one end of circuit board 30 along the transmission direction, and the end of circuit board 30 refers to the other end of circuit board 30 along the transmission direction, but this is not a limitation.
[0037] In one implementation, such as Figure 5 As shown, the first eddy current target array 22 extends inward in the width direction to the first detection coil 121, thereby ensuring that the first detection coil 121 can detect the first eddy current target 221 when the mover passes through the arc segment; the second eddy current target array 23 extends outward in the width direction to the second detection coil 122, ensuring that the second eddy current target array 231 covers the second detection coil 122 in the arc segment, thereby ensuring that the second detection coil 122 can detect the second eddy current target array 231 when the mover passes through the arc segment.
[0038] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application.
[0039] It should be noted that the length and width directions of this application are the length and width directions of the mover 20. When the mover 20 moves along the transmission direction, the length and width directions of the mover 20 may also change. When the mover 20 moves on a straight segment, the length direction of the mover 20 is consistent with the transmission direction corresponding to the straight segment, and the width direction of the mover 20 is perpendicular to the transmission direction of the straight segment. Furthermore, the widths mentioned above are all distances along the width direction, and the lengths are all distances along the length direction, but are not limited to these.
[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.
Claims
1. A transmission line, characterized in that, include: The stator includes a straight segment and an arc segment, each of which includes a drive coil and a detection component. Each detection component includes a first detection coil and a second detection coil. The mover includes a magnet array, a first eddy current target array, and a second eddy current target array. The driving coil can drive the magnet array to move so that the mover moves along the transmission direction. The first eddy current target array includes a plurality of first eddy current targets, and the second eddy current target array includes a plurality of second eddy current targets. Wherein, the first detection coil corresponds to detecting the first eddy current target, the second detection coil corresponds to detecting the first eddy current target, and at least a portion of the length of the first eddy current target is shorter than at least a portion of the length of the second eddy current target; when the mover moves to any position, there exists at least one midpoint of the first detection coil corresponding to the first eddy current target, and neither of the first detection coils excites the second eddy current target, and at least one midpoint of the second detection coil corresponds to the second eddy current target, and neither of the second detection coils excites the first eddy current target.
2. The transmission line according to claim 1, characterized in that, In any of the aforementioned detection components, the first detection coil and the second detection coil are parallel and aligned; the first eddy current target array and the second eddy current target array are parallel and centered; the number of first eddy current targets in the first eddy current target array is greater than the number of second eddy current targets in the second eddy current target array; and / or, The length of the first eddy current target array is greater than the distance between the midpoints of any two adjacent first detection coils, and the length of the second eddy current target array is greater than the distance between the midpoints of any two adjacent second detection coils.
3. The transmission line according to claim 1, characterized in that, The outer edges of all the first vortex targets in the first vortex target array are aligned, and the inner edges of all the first vortex targets in the second vortex target array are aligned; in the first vortex target array, the width of the first vortex target gradually increases from the edge of the first vortex target to the middle of the first vortex target, until it reaches a first preset standard value; in the second vortex target array, the width of the second vortex target gradually decreases from the edge of the second vortex target to the middle of the second vortex target, until it reaches a second preset standard value.
4. The transmission line according to claim 3, characterized in that, When the width of the first vortex target reaches the first preset standard value, and the width of the corresponding second vortex target reaches the second preset standard value, the spacing between the first vortex target and the corresponding second vortex target in the width direction is 0; when the width of the first vortex target does not reach the first preset standard value, and the width of the corresponding second vortex target does not reach the second preset standard value, the spacing between the first vortex target and the corresponding second vortex target in the width direction is the same.
5. The transmission line according to claim 3, characterized in that, From the first vortex target plate at the edge to the first vortex target plate in the middle, the rate of change of the difference between the width of the first vortex target plate and the first preset standard value is the first rate of change; the rate of change of the difference between the width of the second vortex target plate and the second preset standard value is the second rate of change, and the first rate of change is greater than the second rate of change.
6. The transmission line according to claim 3, characterized in that, The width of the first eddy current target is not less than the width of the first detection coil; the width of the second eddy current target is not less than the width of the second detection coil.
7. The transmission line according to any one of claims 1-6, characterized in that, Each of the said straight segments is provided with a first circuit board, and all the detection components in the said straight segment are disposed on the first circuit board; and / or, Each of the arc segments is provided with a second circuit board, and all the detection components in the arc segment are disposed on the second circuit board.
8. The transmission line according to claim 7, characterized in that, The detection component is disposed at the first end of the circuit board; and / or, the detection component is disposed at the last end of the circuit board.
9. The transmission line according to any one of claims 1-6, characterized in that, The first eddy current target array extends the first detection coil inward; The second eddy current target array extends outwards from the second detection coil.
10. The transmission line according to any one of claims 1-6, characterized in that, The arc segment has a transition area at one end that connects with the straight segment. At least one set of detection components is provided in the transition area, and the drive coil and detection components in the transition area are arranged along a straight line.