Magnetic strip assembly, displacement sensor, motor, suspension system and vehicle

Abstract

The invention discloses a magnetic strip assembly, a displacement sensor, a motor, a suspension system and a vehicle, relates to the technical field of vehicles, and aims to solve the problem of how to improve the accuracy of displacement distance detection between two relatively moving parts by the displacement sensor. The magnetic strip assembly comprises a first magnetic strip and a second magnetic strip, wherein the first magnetic strip comprises a first group of magnetic pieces and a second group of magnetic pieces which are arranged along a first direction; the second magnetic strip comprises a third group of magnetic pieces and a fourth group of magnetic pieces which are arranged along the first direction; the surface, facing the second group of magnetic pieces, of the first group of magnetic pieces and the surface, facing the fourth group of magnetic pieces, of the third group of magnetic pieces are coplanar, and the surface, facing the first group of magnetic pieces, of the second group of magnetic pieces and the surface, facing the third group of magnetic pieces, of the fourth group of magnetic pieces are coplanar.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a magnetic stripe assembly, a displacement sensor, a motor, a suspension system and a vehicle. BACKGROUND

[0002] The displacement sensor comprises a read head structure and a magnetic stripe assembly, and the read head structure and the magnetic stripe assembly can be respectively installed on two relative motion components. When the two relative motion components move relative to each other, the read head structure and the magnetic stripe assembly also move relative to each other, so that the read head assembly can read the magnetic field change in the magnetic stripe assembly to detect the relative displacement between the two relative motion components.

[0003] In the prior art, the displacement sensor is not accurate in detecting the relative displacement between the two relative motion components. SUMMARY

[0004] The purpose of the present application is to provide a magnetic stripe assembly, a displacement sensor, a motor, a suspension system and a vehicle, which aims to solve the problem of how to improve the accuracy of the displacement sensor in detecting the displacement distance between the two relative motion components.

[0005] In a first aspect, a magnetic stripe assembly is provided, comprising a first magnetic stripe and a second magnetic stripe, the first magnetic stripe comprising a first group of magnetic pieces and a second group of magnetic pieces arranged along a first direction, the first group of magnetic pieces and the second group of magnetic pieces each comprising a plurality of first magnetic pieces arranged along the first direction; the second magnetic stripe comprising a third group of magnetic pieces and a fourth group of magnetic pieces arranged along the first direction, the third group of magnetic pieces and the fourth group of magnetic pieces each comprising a plurality of second magnetic pieces arranged along the first direction.

[0006] The surface of the first group of magnetic pieces facing the second group of magnetic pieces is coplanar with the surface of the third group of magnetic pieces facing the fourth group of magnetic pieces, and the surface of the second group of magnetic pieces facing the first group of magnetic pieces is coplanar with the surface of the fourth group of magnetic pieces facing the third group of magnetic pieces.

[0007] In the above structure, since the first magnetic stripe comprises a first group of magnetic pieces and a second group of magnetic pieces arranged along a first direction, and the first group of magnetic pieces and the second group of magnetic pieces each comprise a plurality of first magnetic pieces arranged along the first direction. This makes the surface of the first group of magnetic pieces facing the second group of magnetic pieces and the surface of the second group of magnetic pieces facing the first group of magnetic pieces not located at the end position of the first magnetic stripe along the first direction.

[0008] Since the second magnetic stripe comprises a third group of magnetic pieces and a fourth group of magnetic pieces arranged along a first direction, and the third group of magnetic pieces and the fourth group of magnetic pieces each comprise a plurality of second magnetic pieces arranged along the first direction. This makes the surface of the third group of magnetic pieces facing the fourth group of magnetic pieces and the surface of the fourth group of magnetic pieces facing the third group of magnetic pieces not located at the end position of the second magnetic stripe along the first direction.

[0009] When the surface of the first group of magnetic pieces facing the second group of magnetic pieces is coplanar with the surface of the third group of magnetic pieces facing the fourth group of magnetic pieces, and the surface of the second group of magnetic pieces facing the first group of magnetic pieces is coplanar with the surface of the fourth group of magnetic pieces facing the third group of magnetic pieces, the magnetic field of the first magnetic piece in the first group of magnetic pieces close to the second group of magnetic pieces coincides with the magnetic field of the second piece in the third group of magnetic pieces close to the fourth group of magnetic pieces, and the magnetic field of the first magnetic piece in the second group of magnetic pieces close to the first group of magnetic pieces coincides with the magnetic field of the second magnetic piece in the fourth group of magnetic pieces close to the third group of magnetic pieces. The magnetic field intensity at the position where the first magnetic piece and the second magnetic piece are coincident is higher than that at other positions. This makes the position with the strongest magnetic field in the magnetic stripe assembly not located at the end position of the magnetic stripe assembly.

[0010] For two components bidirectionally displaced along a linear direction, the initial position of the read head structure is set at the position where the first magnetic piece and the second magnetic piece are coincident, which is the position with the strongest magnetic field, so as to improve the sensing intensity of the read head structure and the magnetic stripe assembly, and thus improve the accuracy of the displacement sensor in detecting the displacement distance between the two components bidirectionally moving along a linear direction.

[0011] Optionally, along the first direction, the length of the first group of magnetic pieces is equal to the length of the second group of magnetic pieces, and / or, along the first direction, the length of the third group of magnetic pieces is equal to the length of the fourth group of magnetic pieces.

[0012] Optionally, along the first direction, the length of the first group of magnetic pieces is equal to the length of the third group of magnetic pieces, and / or, along the first direction, the length of the second group of magnetic pieces is equal to the length of the fourth group of magnetic pieces.

[0013] Optionally, along the first direction, the size of any two first magnetic pieces in the first magnetic stripe is equal, and / or, along the first direction, the size of any two second magnetic pieces in the second magnetic stripe is equal.

[0014] Optionally, along the first direction, the size of the first magnetic piece is not equal to the size of the second magnetic piece.

[0015] Optionally, along the arrangement direction of the first magnetic stripe and the second magnetic stripe, at least part of one first magnetic piece and one second magnetic piece overlap.

[0016] Optionally, the magnetic stripe assembly further comprises a support, and the first magnetic stripe and the second magnetic stripe are both connected to the support; the magnetic properties of the ends of any two adjacent first magnetic pieces in the first magnetic stripe facing away from the support are opposite; the magnetic properties of the ends of any two adjacent second magnetic pieces in the second magnetic stripe facing away from the support are opposite.

[0017] Optionally, the first magnetic strip and the second magnetic strip form a first assembly, a surface of the first assembly facing away from the support is an arc surface, the arc surface is arched along a direction facing away from the support.

[0018] In a second aspect, a displacement sensor is provided for a target device, the target device comprising a first assembly and a second assembly being relatively movable; the displacement sensor further comprises a read head structure and a magnetic strip assembly, one of the magnetic strip assembly and the read head structure is adapted to be mounted to the first assembly, the other of the magnetic strip assembly and the read head structure is adapted to be mounted to the second assembly, the read head structure cooperates with the magnetic strip assembly to detect relative displacement between the first assembly and the second assembly.

[0019] Optionally, the magnetic strip assembly further comprises a support, the first magnetic strip and the second magnetic strip of the magnetic strip assembly are both connected to the support.

[0020] The read head structure comprises a first sensing portion and a second sensing portion, the first sensing portion is located at a side of the first magnetic strip facing away from the support, for sensing magnetic field variation of the first magnetic strip; the second sensing portion is located at a side of the second magnetic strip facing away from the support, for sensing magnetic field variation of the second magnetic strip.

[0021] Optionally, the read head structure comprises a 3D linear Hall sensor.

[0022] Optionally, the first magnetic strip and the second magnetic strip form a first assembly, a surface of the first assembly facing away from the support is an arc surface, the arc surface is arched along a direction facing away from the support; the first sensing portion and the second sensing portion are arranged circumferentially along the arc surface.

[0023] Optionally, along the circumference of the arc surface, a size of the first magnetic member is greater than a size of the first sensing portion, and / or a size of the second magnetic member is greater than a size of the second sensing portion.

[0024] In a third aspect, an electric machine is provided, comprising a magnetic strip assembly and / or a displacement sensor.

[0025] Optionally, the electric machine comprises a stator assembly and a rotor assembly, the rotor assembly is sleeved on an outer circumferential side of the stator assembly, the rotor assembly is movable relative to the stator assembly along the first direction.

[0026] One of the magnetic strip assembly and the read head structure is mounted to the stator assembly, the other of the magnetic strip assembly and the read head structure is mounted to the rotor assembly, the read head structure cooperates with the magnetic strip assembly to detect relative displacement between the stator assembly and the rotor assembly.

[0027] Optionally, the mover assembly includes a cylindrical body and a third magnetic element. The third magnetic element is fixedly disposed on the inner circumference of the cylindrical body and surrounds the stator assembly for cooperating with the stator assembly to drive the mover assembly to move relative to the stator assembly.

[0028] Optionally, the third magnetic element includes a plurality of magnetic sheets stacked along the first direction; the magnetic strip assembly includes a first magnetic element and a second magnetic element, wherein the size of one of the first magnetic element and the second magnetic element is equal to the size of the magnetic sheet along the first direction.

[0029] Optionally, along the first direction, the size of the first magnetic element is smaller than the size of the second magnetic element, and the size of the first magnetic element is equal to the size of the magnetic sheet.

[0030] Fourthly, a suspension system is provided, including a displacement sensor and / or a motor.

[0031] Fifthly, a vehicle is provided, including a suspension system.

[0032] It should be noted that the technical effects brought about by the implementation methods of the second to fifth aspects of this application can be referred to the technical effects brought about by the corresponding implementation methods of the first aspect, and will not be repeated here. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of this application;

[0035] Figure 2 for Figure 1 A schematic diagram of the motor structure in the suspension system of the vehicle shown.

[0036] Figure 3 for Figure 2 A cross-sectional view of the motor shown.

[0037] Figure 4 for Figure 3 The diagram shows the cooperative structure of the read head and magnetic strip assembly in the displacement sensor of the motor shown, viewed from a first perspective.

[0038] Figure 5 for Figure 4 A schematic diagram of the cooperation structure between the reading head structure and the magnetic strip assembly from a second-view perspective;

[0039] Figure 6 For Figure 4 And Figure 5 Structure diagram of the magnetic stripe assembly.

[0040] Reference signs:

[0041] 1000, vehicle;

[0042] 100, vehicle body; 200, wheel;

[0043] 10, motor; 10a, mover assembly; 101, magnetic sheet; 102, cylinder; 10b, stator assembly; 103, center shaft; 20, fork arm;

[0044] 1, magnetic stripe assembly; 11, first magnetic stripe; 111, first group of magnetic members; 112, second group of magnetic members; 111a, first magnetic member; 12, second magnetic stripe; 121, third group of magnetic members; 122, fourth group of magnetic members; 121a, second magnetic member; 13, arc surface; 14, support member;

[0045] 2, read head structure; 21, first induction part; 22, second induction part; 23, housing. DETAILED DESCRIPTION

[0046] In the embodiments of the present application, the terms "first", "second", "third", "fourth", "fifth", and "sixth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", and "sixth" can explicitly or implicitly include one or more of the features.

[0047] In the embodiments of the present application, the terms "including", "containing" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including one" does not exclude the presence of other equal elements in the process, method, article or device including the element.

[0048] "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0049] In the embodiments of the present application, "parallel", "perpendicular", and "equal" include the stated cases and cases similar to the stated cases, the similar cases being within an acceptable deviation range, wherein the acceptable deviation range is determined by those of ordinary skill in the art taking into account the measurement being discussed and the error related to the measurement of the specific quantity (i.e., the limitation of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, wherein the acceptable deviation range of approximate parallel may, for example, be a deviation within 5°; "perpendicular" includes absolute perpendicular and approximate perpendicular, wherein the acceptable deviation range of approximate perpendicular may, for example, also be a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may, for example, be that the difference between the two equalities is less than or equal to 5% of either one.

[0050] The present application provides a vehicle 1000, which can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, a range-extended electric vehicle, a fuel vehicle, etc. The vehicle 1000 can also be a sedan, a van, a bus, a truck, a trailer, etc.

[0051] As shown in Figure 1 , Figure 1 A structural schematic diagram of a vehicle 1000 is provided in the embodiments of the present application. The vehicle 1000 includes a vehicle body 100 and vehicle wheels 200. The vehicle body 100 is used for passengers to ride and carry articles, and the vehicle wheels 200 are installed below the vehicle body 100, used for carrying the vehicle body 100 and rolling on the road surface to make the vehicle 1000 travel.

[0052] The vehicle 1000 further includes a suspension system, which is arranged between the vehicle body 100 and the vehicle wheels 200, used for transmitting force and torque between the vehicle body 100 and the vehicle wheels 200, and buffering the impact force received by the vehicle body 100 during the travel of the vehicle 1000 to improve the riding or driving comfort.

[0053] The suspension system can be a non-independent suspension system, an independent suspension system, or an active suspension system.

[0054] In some embodiments of the present application, the suspension system is described as an active suspension system, and the stiffness and damping characteristics of the active suspension system are dynamically self-adapted according to the travel conditions of the vehicle 1000 (such as the motion state of the vehicle 1000 and the condition of the road surface, etc.) to make the suspension system always in the best damping state.

[0055] Referring to Figure 2 and Figure 3The suspension system can include a motor 10 and a fork arm 20, one end of the motor 10 is connected with the wheel 200 through the fork arm 20, and the other end is connected with the vehicle body 100. The motor 10 includes a mover assembly 10a and a stator assembly 10b, the mover assembly 10a is sleeved on the outer periphery of the stator assembly 10b, and the mover assembly 10a can move relative to the stator assembly 10b along the axial direction of the motor 10. Among them, the fork arm 20 is connected with the mover assembly 10a, and the stator assembly 10b is connected with the vehicle body 100. By moving the mover assembly 10a relative to the stator assembly 10b along the axial direction of the motor 10, the fork arm 20 can be driven to move relative to the stator assembly 10b along the axial direction of the motor 10, so as to adjust the distance between the vehicle body 100 and the wheel 200.

[0056] Among them, the mover assembly 10a includes a cylinder body 102 and a third magnetic member arranged on the inner periphery side of the cylinder body 102, and the stator assembly 10b includes a central shaft 103 and a fourth magnetic member arranged around the central shaft 103, and the third magnetic member surrounds the stator assembly 10b. The cylinder body 102 is in sliding connection with the central shaft 103, and the cylinder body 102 can move relative to the central shaft 103 along the axial direction of the motor 10.

[0057] In some examples, one of the third magnetic member and the fourth magnetic member can be an iron core plus an electromagnetic coil, and the other can be one of an electromagnet or a permanent magnet. The magnetic force between the third magnetic member and the fourth magnetic member can be adjusted by changing the current in the electromagnetic coil. For example, the third magnetic member is a permanent magnet, and the fourth magnetic member is an iron core plus an electromagnetic coil. After the electromagnetic coil is energized, a magnetic field is generated, and the magnetic field of the electromagnetic coil interacts with the magnetic field of the permanent magnet to generate a thrust along the axial direction of the motor 10, thereby driving the mover assembly 10a to move relative to the stator assembly 10b.

[0058] In some examples, the third magnetic member can be connected to the cylinder body 102 by a connecting member such as a bolt.

[0059] In other examples, the third magnetic member can be fixed to the inner periphery side of the cylinder body 102 by a limiting block. For example, one end of the third magnetic member away from the fork arm 20 abuts against the mover assembly 10a, and a plurality of limiting blocks are arranged circumferentially at one end of the third magnetic member close to the fork arm 20, and the limiting blocks are connected to the cylinder body 102 by bolts or other components.

[0060] In some embodiments, the cylinder body 102 of the mover assembly 10a is connected with the fork arm 20, and one end of the central shaft 103 of the stator assembly 10b away from the fork arm 20 is connected with the vehicle body 100. By adjusting the magnetic force between the third magnetic member and the fourth magnetic member, the cylinder body 102 is driven to displace relative to the central shaft 103, thereby driving the fork arm 20 to displace relative to the central shaft 103, so as to adjust the distance between the wheel 200 and the vehicle body 100.

[0061] To measure the displacement distance of the mover assembly 10a relative to the stator assembly 10b, a displacement sensor can be provided on the motor 10. Referring to Figure 3 , Figure 4 and Figure 5 , the displacement sensor comprises a read head structure 2 and a magnetic strip assembly 1. The read head structure is arranged opposite to the magnetic strip assembly 1 to read the change of the magnetic field in the magnetic strip assembly 1 to detect the displacement. One of the read head structure 2 and the magnetic strip assembly 1 is connected to the mover assembly 10a of the motor 10, and the other is connected to the stator assembly 10b of the motor 10. When the mover assembly 10a moves relative to the stator assembly 10b, the read head structure 2 and the magnetic strip assembly 1 will also move relative to each other. During the displacement, the change of the magnetic field of the magnetic strip assembly 1 is sensed by the read head structure 2 to obtain the displacement of the mover assembly 10a relative to the stator assembly 10b.

[0062] When encountering a rough road, the mover assembly 10a can move relative to the stator assembly 10b along the axial direction of the motor 10 to adjust the distance between the wheel 200 and the vehicle body 100 to maintain the balance of the vehicle body 100. At the same time, the displacement distance of the mover assembly 10a relative to the stator assembly 10b is obtained by the cooperation of the magnetic strip assembly 1 and the read head structure 2 to accurately control the distance between the wheel 200 and the vehicle body 100 and improve the comfort of the vehicle 1000.

[0063] In some examples, the first direction is the axial direction of the motor 10, and the mover assembly 10a can move relative to the stator assembly 10b in the first direction towards the direction close to the vehicle body 100. At this time, the distance between the wheel 200 and the vehicle body 100 is reduced. The mover assembly 10a can also move relative to the stator assembly 10b in the first direction towards the direction away from the vehicle body 100, at which time the distance between the wheel 200 and the vehicle body 100 is increased. That is, the mover assembly 10a can move relative to the stator assembly 10b in the first direction in both directions.

[0064] In some examples, the magnetic strip assembly 1 is mounted on the stator assembly 10b, and the read head structure 2 is mounted on the mover assembly 10a.

[0065] In other examples, the magnetic strip assembly 1 is mounted on the mover assembly 10a, and the read head structure 2 is mounted on the stator assembly 10b.

[0066] In some embodiments, referring to Figure 6The magnetic stripe assembly 1 includes a first magnetic stripe 11 and a second magnetic stripe 12. The first magnetic stripe 11 includes a first group of magnetic pieces 111 and a second group of magnetic pieces 112 arranged along a first direction. The first group of magnetic pieces 111 and the second group of magnetic pieces 112 each include a plurality of first magnetic pieces 111a arranged along the first direction. The second magnetic stripe 12 includes a third group of magnetic pieces 121 and a fourth group of magnetic pieces 122 arranged along the first direction. The third group of magnetic pieces 121 and the fourth group of magnetic pieces 122 each include a plurality of second magnetic pieces 121a arranged along the first direction.

[0067] The surface of the first group of magnetic pieces 111 facing the second group of magnetic pieces 112 is coplanar with the surface of the third group of magnetic pieces 121 facing the fourth group of magnetic pieces 122. The surface of the second group of magnetic pieces 112 facing the first group of magnetic pieces 111 is coplanar with the surface of the fourth group of magnetic pieces 122 facing the third group of magnetic pieces 121.

[0068] In the above structure, since the first magnetic stripe 11 includes the first group of magnetic pieces 111 and the second group of magnetic pieces 112 arranged along the first direction, and the first group of magnetic pieces 111 and the second group of magnetic pieces 112 each include a plurality of first magnetic pieces 111a arranged along the first direction. This makes the surface of the first group of magnetic pieces 111 facing the second group of magnetic pieces 112 and the surface of the second group of magnetic pieces 112 facing the first group of magnetic pieces 111 not located at the end position of the first magnetic stripe 11 along the first direction.

[0069] Since the second magnetic stripe 12 includes the third group of magnetic pieces 121 and the fourth group of magnetic pieces 122 arranged along the first direction, and the third group of magnetic pieces 121 and the fourth group of magnetic pieces 122 each include a plurality of second magnetic pieces 121a arranged along the first direction. This makes the surface of the third group of magnetic pieces 121 facing the fourth group of magnetic pieces 122 and the surface of the fourth group of magnetic pieces 122 facing the third group of magnetic pieces 121 not located at the end position of the second magnetic stripe 12 along the first direction.

[0070] When the surface of the first set of magnetic pieces 111 facing the second set of magnetic pieces 112 is coplanar with the surface of the third set of magnetic pieces 121 facing the fourth set of magnetic pieces 122, and the surface of the second set of magnetic pieces 112 facing the first set of magnetic pieces 111 is coplanar with the surface of the fourth set of magnetic pieces 122 facing the third set of magnetic pieces 121, the magnetic field of the first magnetic piece 111a in the first set of magnetic pieces 111 close to the second set of magnetic pieces 112 coincides with the magnetic field of the second magnetic piece in the third set of magnetic pieces 121 close to the fourth set of magnetic pieces 122, and the magnetic field of the first magnetic piece 111a in the second set of magnetic pieces 112 close to the first set of magnetic pieces 111 coincides with the magnetic field of the second magnetic piece 121a in the fourth set of magnetic pieces 122 close to the third set of magnetic pieces 121. The magnetic field intensity at the position where the first magnetic piece 111a and the second magnetic piece 121a coincide with each other is higher than the magnetic field intensity at other positions. This makes the position with the highest magnetic field intensity in the magnetic stripe assembly 1 not located at the end position of the magnetic stripe assembly 1.

[0071] For the convenience of description, the position where the first set of magnetic pieces 111 and the second set of magnetic pieces 112 of the magnetic stripe assembly 1 are connected, and the position where the third set of magnetic pieces 121 and the fourth set of magnetic pieces 122 are connected are named as the middle position, and the middle position is also the position with the highest magnetic field intensity in the magnetic stripe assembly 1.

[0072] For the two components moving bidirectionally along the linear direction, the initial position of the read head structure 2 is set at the middle position of the magnetic stripe assembly 1, which is the position with the highest magnetic field intensity, so as to improve the sensing intensity of the read head structure 2 and the magnetic stripe assembly 1, thereby improving the accuracy of the displacement sensor in detecting the displacement distance between the two components moving bidirectionally along the linear direction.

[0073] In some examples, the first magnetic piece 111a and the second magnetic piece 121a can be permanent magnets.

[0074] In some examples, when the first magnetic piece 111a in the first set of magnetic pieces 111 closest to the second set of magnetic pieces 112 is N-pole close to one end of the read head assembly, the second magnetic piece 121a in the third set of magnetic pieces 121 closest to the fourth set of magnetic pieces 122 is also N-pole close to one end of the read head assembly. At this time, the first magnetic piece 111a in the second set of magnetic pieces 112 closest to the first set of magnetic pieces 111 is S-pole close to one end of the read head assembly, and the second magnetic piece 121a in the fourth set of magnetic pieces 122 closest to the third set of magnetic pieces 121 is also S-pole close to one end of the read head assembly.

[0075] In some examples, when the first magnetic piece 111a closest to the second magnetic piece 112 of the first group of magnetic pieces 111 is an S pole near one end of the read head assembly, the second magnetic piece 121a closest to the fourth magnetic piece 122 of the third group of magnetic pieces 121 is also an S pole near one end of the read head assembly. At this time, the first magnetic piece 111a closest to the second magnetic piece 112 of the first group of magnetic pieces 111 is an N pole near one end of the read head assembly, and the second magnetic piece 121a closest to the fourth magnetic piece 122 of the third group of magnetic pieces 121 is also an N pole near one end of the read head assembly.

[0076] When the displacement sensor is arranged in the motor 10 of the suspension system, the initial position of the read head structure 2 can be set at the middle position. The magnetic field strength at this position is the strongest relative to other positions in the magnetic strip assembly 1. When the motor 10 is initially powered on, the displacement sensor is prone to jumping. By setting the initial position of the read head structure 2 at the position with the strongest magnetic field strength, the probability of the displacement sensor jumping when initially powered on can be reduced, and the accuracy of controlling the distance between the wheel 200 and the vehicle body 100 can be improved.

[0077] In some embodiments, the length of the first group of magnetic pieces 111 is equal to the length of the second group of magnetic pieces 112 along the first direction, and / or the length of the third group of magnetic pieces 121 is equal to the length of the fourth group of magnetic pieces 122 along the first direction.

[0078] In the above scheme, the length of the first group of magnetic pieces 111 is equal to the length of the second group of magnetic pieces 112 along the first direction, so the surface of the first group of magnetic pieces 111 facing the second group of magnetic pieces 112 and the surface of the second group of magnetic pieces 112 facing the first group of magnetic pieces 111 are located at the middle position of the first magnetic strip 11. This allows the initial position of the read head structure 2 to be set at the middle position of the first magnetic strip 11, and the bidirectional displacement distance of the read head structure 2 relative to the first magnetic strip 11 along the first direction is the same, thereby improving the bidirectional measurement capability of the displacement sensor.

[0079] The length of the third group of magnetic pieces 121 is equal to the length of the fourth group of magnetic pieces 122 along the first direction, so the surface of the third group of magnetic pieces 121 facing the fourth group of magnetic pieces 122 and the surface of the fourth group of magnetic pieces 122 facing the third group of magnetic pieces 121 are located at the middle position of the second magnetic strip 12. This allows the initial position of the read head structure 2 to be set at the middle position of the second magnetic strip 12, and the bidirectional displacement distance of the read head structure 2 relative to the second magnetic strip 12 along the first direction is the same, thereby improving the bidirectional measurement capability of the displacement sensor.

[0080] In the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the second group of magnetic pieces 112, and the length of the third group of magnetic pieces 121 is equal to the length of the fourth group of magnetic pieces 122. Then, the bidirectional displacement distance of the read head structure 2 relative to the magnetic stripe assembly 1 in the first direction is the same, which improves the bidirectional measurement capability of the displacement sensor.

[0081] In some examples, the length of the first group of magnetic pieces 111 and the second group of magnetic pieces 112 in the first direction is equal, and the length of the third group of magnetic pieces 121 and the fourth group of magnetic pieces 122 in the first direction is not equal.

[0082] In other examples, the length of the first group of magnetic pieces 111 and the second group of magnetic pieces 112 in the first direction is not equal, and the length of the third group of magnetic pieces 121 and the fourth group of magnetic pieces 122 in the first direction is equal.

[0083] In yet other examples, in the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the second group of magnetic pieces 112, and the length of the third group of magnetic pieces 121 is equal to the length of the fourth group of magnetic pieces 122.

[0084] In some embodiments, in the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and / or, in the first direction, the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0085] In the above scheme, in the first direction, since the read head structure 2 includes the first sensing part 21 and the second sensing part 22, the first sensing part 21 and the second sensing part 22 are synchronously moved, when the length of the first group of magnetic pieces 111 and the third group of magnetic pieces 121 is equal, the length of the first group of magnetic pieces 111 and the third group of magnetic pieces 121 is effective length when measuring the displacement amount, which avoids material waste.

[0086] Similarly, when the length of the second group of magnetic pieces 112 and the fourth group of magnetic pieces 122 in the first direction is equal, the length of the second group of magnetic pieces 112 and the fourth group of magnetic pieces 122 is effective length when measuring the displacement amount, which avoids material waste.

[0087] In the first direction, when the length of the first group of magnetic pieces 111 and the third group of magnetic pieces 121 is equal, and the length of the second group of magnetic pieces 112 and the fourth group of magnetic pieces 122 is equal. This makes the whole of the first magnetic stripe 11 and the second magnetic stripe 12 to be effective length, which can improve the utilization rate of the first magnetic stripe 11 and the second magnetic stripe 12.

[0088] In some examples, in the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is not equal to the length of the fourth group of magnetic pieces 122.

[0089] In some examples, along the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0090] In some examples, along the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0091] In some examples, along the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0092] In some examples, along the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0093] In some examples, along the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0094] In some examples, along the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0095] In some examples, along the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0096] In some examples, along the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0097] In some examples, along the first direction, the length of the first group of magnetic pieces 111 is equal to the length of the third group of magnetic pieces 121, and the length of the second group of magnetic pieces 112 is equal to the length of the fourth group of magnetic pieces 122.

[0098] In some embodiments, the size of the first magnetic piece 111a is not equal to the size of the second magnetic piece 121a along the first direction. At this time, the thinner one of the first magnetic piece 111a and the second magnetic piece 121a can reduce the pole pitch of the corresponding magnetic stripe, and improve the resolution and sensitivity of detection. While the thicker one of the first magnetic piece 111a and the second magnetic piece 121a can improve the magnetic field strength and stability of the corresponding magnetic stripe, and improve the reliability of the induced signal with the read head structure 2.

[0099] In some examples, the size of the first magnetic piece 111a is greater than the size of the second magnetic piece 121a along the first direction. For example, the size of the first magnetic piece 111a along the first direction is 1mm, and the size of the second magnetic piece 121a along the first direction can be 0.9mm, 0.8mm, etc.

[0100] In other examples, the size of the first magnetic piece 111a is less than the size of the second magnetic piece 121a along the first direction. For example, the size of the first magnetic piece 111a along the first direction is 1mm, and the size of the second magnetic piece 121a along the first direction can be 1.1mm, 1.2mm, etc.

[0101] In some embodiments, referring to Figure 6 , along the arrangement direction of the first magnetic stripe 11 and the second magnetic stripe 12, at least part of one first magnetic piece 111a and one second magnetic piece 121a overlap. This makes the one with larger size along the first direction among the first magnetic piece 111a and the second magnetic piece 121a, that is, can enhance the magnetic field strength of the magnetic stripe, and also can take into account the magnetic field density, and improve the detection accuracy.

[0102] In some examples, the size of the first magnetic piece 111a is greater than the size of the second magnetic piece 121a along the first direction, and the size of the first magnetic piece 111a is less than the sum of the sizes of the two second magnetic pieces 121a along the first direction.

[0103] In other examples, the size of the second magnetic piece 121a is greater than the size of the first magnetic piece 111a along the first direction, and the size of the second magnetic piece 121a is less than the sum of the sizes of the two first magnetic pieces 111a.

[0104] In some embodiments, referring to Figure 6The magnetic stripe assembly 1 further comprises a support 14, and the first magnetic stripe 11 and the second magnetic stripe 12 are both connected to the support 14. The magnetic properties of any two adjacent first magnetic members 111a at the end facing away from the support 14 are opposite, i.e. one is N-pole and the other is S-pole. The magnetic properties of any two adjacent second magnetic members 121a at the end facing away from the support 14 are opposite, i.e. one is N-pole and the other is S-pole. When the read head structure 2 moves along the magnetic stripe assembly 1, the magnetic poles change alternately to generate a continuous magnetic field flipping signal. This periodic change is captured by the read head structure 2 through electromagnetic induction, converted into an electric pulse signal, and the displacement amount is accurately counted and the direction is determined.

[0105] In some examples, the first magnetic stripe 11 and the second magnetic stripe 12 are adhered to the support 14 by glue or adhesive tape.

[0106] In other examples, a magnetic stripe shell can be provided, the first magnetic stripe 11 and the second magnetic stripe 12 are fixed in the magnetic stripe shell, and the magnetic stripe shell is connected to the support 14 by screws or other components.

[0107] In some embodiments, a displacement sensor can be used for a target device, the target device comprising a first component and a second component that are relatively movable. The displacement sensor further comprises a read head structure 2 and a magnetic stripe assembly 1, one of the magnetic stripe assembly 1 and the read head structure 2 is adapted to be mounted to the first component, and the other of the magnetic stripe assembly 1 and the read head structure 2 is adapted to be mounted to the second component. The read head structure 2 cooperates with the magnetic stripe assembly 1 to detect the relative displacement of the first component and the second component.

[0108] In some examples, the target device can be a slide rail and a slider, and the displacement sensor can be used for the slide rail and slider device. For example, the magnetic stripe assembly 1 is connected to the slide rail, and the read head structure 2 is connected to the slider. The displacement amount of the slider relative to the slide rail is obtained by the cooperation of the read head structure 2 and the magnetic stripe assembly 1.

[0109] In other examples, the target device can be a motor 10, the read head structure 2 can be connected to a rotor assembly 10a of the motor 10, and the magnetic stripe assembly 1 can be connected to a stator assembly 10b. The displacement amount of the rotor assembly 10a relative to the stator assembly 10b is obtained by the cooperation of the read head structure 2 and the magnetic stripe assembly 1.

[0110] In some embodiments, reference can be made to Figure 4 and Figure 5The magnetic stripe assembly 1 further comprises a support 14, and the first magnetic stripe 11 and the second magnetic stripe 12 of the magnetic stripe assembly 1 are both connected to the support 14. The read head structure 2 comprises a first sensing portion 21 and a second sensing portion 22. The first sensing portion 21 is located on a side of the first magnetic stripe 11 facing away from the support 14, and is configured to sense a magnetic field change of the first magnetic stripe 11.

[0111] The second sensing portion 22 is located on a side of the second magnetic stripe 12 facing away from the support 14, and is configured to sense a magnetic field change of the second magnetic stripe 12.

[0112] In the above scheme, the read head structure 2 is provided with the first sensing portion 21 and the second sensing portion 22, and the first sensing portion 21 is configured to sense the magnetic field change of the first magnetic stripe 11, and the second sensing portion 22 is configured to sense the magnetic field change of the second magnetic stripe 12, so as to form a double-sensing structure. The double-sensing structure is configured to independently detect a polarity signal of the first magnetic stripe 11 through the first sensing portion 21, and independently detect a polarity signal of the second magnetic stripe 12 through the second sensing portion 22, so as to effectively filter abnormal interference and ensure the reliability of the measurement result.

[0113] In some examples, the first sensing portion 21 is a first sensor, and the second sensing portion 22 is a second sensor. The read head structure 2 further comprises a connecting member, and the first sensor and the second sensor are both connected to the housing 23.

[0114] In other examples, the read head structure 2 can be one sensing member, and the sensing member has two sensing areas inside, and the two sensing areas form the first sensing portion 21 and the second sensing portion 22.

[0115] In some embodiments, the read head structure 2 comprises a 3D linear Hall sensor. The 3D linear Hall sensor is used to measure the magnetic field, and two-phase difference 90° signals can be obtained to calculate the position of the 3D linear Hall sensor relative to the magnetic stripe assembly 1, and the measurement accuracy of the displacement of the mover assembly 10a and the stator assembly 10b is improved compared with a single-axis linear Hall sensor.

[0116] In some examples, the first sensing portion 21 in the read head structure 2 is a first 3D linear Hall sensor, and the second sensing portion 22 is a second 3D linear Hall sensor. The first 3D linear Hall sensor is configured to sense the magnetic field change of the first magnetic stripe 11, and the second 3D linear Hall sensor is configured to sense the magnetic field change of the second magnetic stripe 12.

[0117] In other embodiments, the read head structure 2 comprises a single-axis linear Hall sensor.

[0118] In some embodiments, referring to Figure 5The first magnetic strip 11 and the second magnetic strip 12 form a first assembly, and a surface of the first assembly opposite to the support 14 is an arc surface 13 which is arched in a direction opposite to the support 14. The first sensing portion 21 and the second sensing portion 22 are arranged along a circumferential direction of the arc surface 13.

[0119] In the above scheme, a surface of the first magnetic strip 11 opposite to the support 14 is a first arc surface, a surface of the second magnetic strip 12 opposite to the support 14 is a second arc surface, and the first arc surface and the second arc surface are located on the same arc surface, thereby forming the arc surface 13 of the first assembly. When the displacement sensor is installed on the motor 10, the magnetic strip assembly 1 can be arranged on a central axis 103 of the stator assembly 10b, and the read head structure 2 can be arranged on the rotor assembly 10a. Since the central axis 103 in the motor 10 has a circumferential surface facing an outer surface of the rotor assembly 10a, the surface of the first assembly opposite to the support 14 is arranged as the arc surface 13, so that the first assembly can be embeddedly arranged on the central axis 103 and can be coplanar with the surface of the central axis 103, thereby preventing the first assembly from being stuck with other components when the rotor assembly 10a moves relative to the stator assembly 10b.

[0120] In some other embodiments, a surface of the first assembly opposite to the support 14 is a plane, and the first sensing portion 21 and the second sensing portion 22 are arranged along a direction in which the first magnetic strip 11 and the second magnetic strip 12 are arranged.

[0121] In some embodiments, along the circumferential direction of the arc surface 13, the size of the first magnetic member 111a is greater than the size of the first sensing portion 21, and / or the size of the second magnetic member 121a is greater than the size of the second sensing portion 22.

[0122] Along the circumferential direction of the arc surface 13, when the size of the first magnetic member 111a is greater than the size of the first sensing portion 21, the angle of deflection of the first sensing portion 21 relative to the first magnetic member 111a along the circumferential direction of the arc surface 13 is increased, thereby improving the fault tolerance of the installation angle of the first sensing portion 21 relative to the first magnetic strip 11 during installation. When the size of the second magnetic member 121a is greater than the size of the second sensing portion 22, the angle of deflection of the second sensing portion 22 relative to the second magnetic member 121a along the circumferential direction of the arc surface 13 is increased, thereby improving the fault tolerance of the installation angle of the second sensing portion 22 relative to the second magnetic strip 12 during installation. Along the circumferential direction of the arc surface 13, when the size of the first magnetic member 111a is greater than the size of the first sensing portion 21 and the size of the second magnetic member 121a is greater than the size of the second sensing portion 22, the angle of deflection of the read head structure 2 relative to the magnetic strip assembly 1 along the circumferential direction of the arc surface 13 is increased, thereby improving the fault tolerance of the installation angle of the read head structure 2 relative to the magnetic strip assembly 1 during installation.

[0123] In some examples, along the circumferential direction of the arc surface 13, the size of the first magnetic member 111a is greater than the size of the first sensing portion 21.

[0124] In some examples, along the circumferential direction of the arc surface 13, the size of the second magnetic member 121a is greater than the size of the second induction portion 22.

[0125] In some examples, along the circumferential direction of the arc surface 13, the size of the first magnetic member 111a is greater than the size of the first induction portion 21, and the size of the second magnetic member 121a is greater than the size of the second induction portion 22.

[0126] In some embodiments, referring to Figure 3 and Figure 6 , the third magnetic member includes a plurality of magnetic sheets 101 stacked along the first direction. The magnetic strip assembly 1 includes the first magnetic member 111a and the second magnetic member 121a, along the first direction, the size of one of the first magnetic member 111a and the second magnetic member 121a is equal to the size of the magnetic sheet 101. In this way, the pole pitch of one of the first magnetic strip 11 or the second magnetic strip 12 is the same as the pole pitch of the motor 10, so that even if the read head structure 2 and the magnetic strip assembly 1 jump when they are inducted, the distance of the jump of the read head structure 2 and the magnetic strip assembly 1 is an integer multiple of the size of the magnetic sheet 101, which does not affect the electrical angle of the motor 10, thereby ensuring that even if the read head structure 2 and the magnetic strip assembly 1 jump, it does not affect the output size of the motor 10, and improves the stability of the motor 10.

[0127] It should be noted that the jumping rotor assembly 10a has a displacement relative to the stator assembly 10b, but the displacement sensor does not read the displacement amount.

[0128] In some examples, along the first direction, the size of the first magnetic member 111a is the same as the size of the magnetic sheet 101.

[0129] In some examples, along the first direction, the size of the second magnetic member 121a is the same as the size of the magnetic sheet 101.

[0130] In some specific examples, along the first direction, the size of the first magnetic member 111a is smaller than the size of the second magnetic member 121a, and the size of the first magnetic member 111a is equal to the size of the magnetic sheet 101. By setting the pole pitch of the motor 10 to be the same as the first magnetic strip 11 with a relatively smaller size, the control of the motor 10 on parameters such as position and speed is more accurate.

[0131] In some examples, along the first direction, the size of the first magnetic member 111a can be 2mm, 3mm, etc. When the size of the first magnetic member 111a is 2mm, the size of the second magnetic member 121a can be 2.2mm, 2.3mm, 2.4mm, etc. When the size of the first magnetic member 111a is 3mm, the size of the second magnetic member 121a can be 3.1mm, 3.2mm, 3.3mm, etc.

[0132] In the description of the embodiments of the present application, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0133] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A magnetic stripe assembly used in a displacement sensor, characterized in that, The magnetic strip assembly includes a first magnetic strip (11) and a second magnetic strip (12). The first magnetic strip (11) includes a first group of magnetic elements (111) and a second group of magnetic elements (112) arranged along a first direction. The first group of magnetic elements (111) and the second group of magnetic elements (112) each include a plurality of first magnetic elements (111a) arranged along the first direction. The second magnetic strip (12) includes a third group of magnetic elements (121) and a fourth group of magnetic elements (122) arranged along the first direction. Both the third group of magnetic elements (121) and the fourth group of magnetic elements (122) include a plurality of second magnetic elements (121a) arranged along the first direction. The surface of the first group of magnetic components (111) facing the second group of magnetic components (112) is coplanar with the surface of the third group of magnetic components (121) facing the fourth group of magnetic components (122), and the surface of the second group of magnetic components (112) facing the first group of magnetic components (111) is coplanar with the surface of the fourth group of magnetic components (122) facing the third group of magnetic components (121).

2. The magnetic strip assembly according to claim 1, characterized in that, Along the first direction, the length of the first group of magnetic elements (111) is equal to the length of the second group of magnetic elements (112), and / or, along the first direction, the length of the third group of magnetic elements (121) is equal to the length of the fourth group of magnetic elements (122).

3. The magnetic stripe assembly according to claim 1, characterized in that, Along the first direction, the length of the first group of magnetic elements (111) is equal to the length of the third group of magnetic elements (121), and / or, along the first direction, the length of the second group of magnetic elements (112) is equal to the length of the fourth group of magnetic elements (122).

4. The magnetic stripe assembly according to claim 1, characterized in that, Along the first direction, any two first magnetic elements (111a) in the first magnetic strip (11) are of equal size, and / or, along the first direction, any two second magnetic elements (121a) in the second magnetic strip (12) are of equal size.

5. The magnetic stripe assembly according to claim 1, characterized in that, Along the first direction, the size of the first magnetic element (111a) is not equal to the size of the second magnetic element (121a).

6. The magnetic strip assembly according to claim 5, characterized in that, Along the arrangement direction of the first magnetic strip (11) and the second magnetic strip (12), at least a portion of the first magnetic element (111a) and the second magnetic element (121a) overlap.

7. The magnetic stripe assembly according to claim 1, characterized in that, The magnetic strip assembly further includes a support member (14), to which both the first magnetic strip (11) and the second magnetic strip (12) are connected; The magnetic properties of any two adjacent first magnetic elements (111a) in the first magnetic strip (11) are opposite at the ends opposite to the support member (14); the magnetic properties of any two adjacent second magnetic elements (121a) in the second magnetic strip (12) are opposite at the ends opposite to the support member (14).

8. The magnetic stripe assembly according to claim 7, characterized in that, The first magnetic strip (11) and the second magnetic strip (12) form a first component. The surface of the first component facing away from the support member (14) is an arc-shaped surface (13), which arches in the direction facing away from the support member (14).

9. A displacement sensor, characterized in that, For a target device, the target device includes a first component and a second component that are relatively movable; The displacement sensor further includes a read head structure (2) and a magnetic strip assembly (1) according to any one of claims 1-8, one of the magnetic strip assembly (1) and the read head structure (2) being adapted to be mounted on the first component, and the other of the magnetic strip assembly (1) and the read head structure (2) being adapted to be mounted on the second component, the read head structure (2) cooperating with the magnetic strip assembly (1) to detect the relative displacement between the first component and the second component.

10. The displacement sensor according to claim 9, characterized in that, The magnetic strip assembly (1) further includes a support member (14), and the first magnetic strip (11) and the second magnetic strip (12) of the magnetic strip assembly (1) are both connected to the support member (14); The reading head structure (2) includes a first sensing part (21) and a second sensing part (22). The first sensing part (21) is located on the side of the first magnetic strip (11) facing away from the support member (14) and is used to sense the magnetic field change of the first magnetic strip (11). The second sensing part (22) is located on the side of the second magnetic strip (12) facing away from the support member (14) and is used to sense the magnetic field change of the second magnetic strip (12).

11. The displacement sensor according to claim 9, characterized in that, The read head structure (2) includes a 3D linear Hall sensor.

12. The displacement sensor according to claim 10, characterized in that, The first magnetic strip (11) and the second magnetic strip (12) form a first component. The surface of the first component facing away from the support member (14) is an arc-shaped surface (13), and the arc-shaped surface (13) arches in the direction facing away from the support member (14). The first sensing part (21) and the second sensing part (22) are arranged circumferentially along the arc-shaped surface (13).

13. The displacement sensor according to claim 12, characterized in that, Along the circumference of the arc surface (13), the size of the first magnetic element (111a) is larger than the size of the first sensing part (21), and / or the size of the second magnetic element (121a) is larger than the size of the second sensing part (22).

14. An electric motor (10), characterized in that, It includes the magnetic strip assembly (1) according to any one of claims 1-8, and / or the displacement sensor according to any one of claims 9-13.

15. The motor (10) according to claim 14, characterized in that, The motor (10) includes a stator assembly (10b) and a mover assembly (10a). The mover assembly (10a) is sleeved on the outer periphery of the stator assembly (10b). The mover assembly (10a) can move relative to the stator assembly (10b) along the first direction. One of the magnetic stripe assembly (1) and the read head structure (2) is mounted on the stator assembly (10b), and the other of the magnetic stripe assembly (1) and the read head structure (2) is mounted on the mover assembly (10a). The read head structure (2) cooperates with the magnetic stripe assembly (1) to detect the relative displacement between the stator assembly (10b) and the mover assembly (10a).

16. The motor (10) according to claim 15, characterized in that, The mover assembly (10a) includes a cylindrical body (102) and a third magnetic element. The third magnetic element is fixedly disposed on the inner circumference of the cylindrical body (102) and surrounds the stator assembly (10b) for cooperating with the stator assembly (10b) to drive the mover assembly (10a) to move relative to the stator assembly (10b).

17. The motor (10) according to claim 16, characterized in that, The third magnetic component includes a plurality of magnetic sheets (101) stacked along the first direction; The magnetic strip assembly (1) includes a first magnetic element (111a) and a second magnetic element (121a), and along the first direction, the size of one of the first magnetic element (111a) and the second magnetic element (121a) is equal to the size of the magnetic sheet (101).

18. The motor (10) according to claim 17, characterized in that, Along the first direction, the size of the first magnetic element (111a) is smaller than the size of the second magnetic element (121a), and the size of the first magnetic element (111a) is equal to the size of the magnetic sheet (101).

19. A suspension system, characterized in that, It includes the displacement sensor according to any one of claims 9-13, and / or the motor (10) according to any one of claims 14-18.

20. A vehicle, characterized in that, Includes the suspension system as described in claim 19.

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