Sensing device

Abstract

Embodiments provide a sensing device, comprising: a magnet; a collector arranged to correspond to a path along which the magnet moves; and a first sensor disposed in the collector, wherein: the collector comprises a first leg, a second leg, and a third leg; the magnet comprises a first magnetic pole and a second magnetic pole; the first leg and the second leg are arranged to oppose the first magnetic pole; the third leg is arranged to oppose the second magnetic pole.

Description

TECHNICAL FIELD

[0001] Embodiments relate to a sensing device. BACKGROUND

[0002] An electric power steering structure includes a rack that converts rotational motion of an input shaft into linear motion and transmits the linear motion to a wheel of a vehicle. In addition, the electric power steering structure includes a sensing device that measures a steering angle by detecting a position of the rack.

[0003] The sensing device includes a magnet installed on the rack, a tube through which the magnet passes, and a plurality of coils wound around the tube. In addition, the sensing device can detect the position of the rack through an induced magnetic field between the coils and the magnet. However, there is a problem in that manufacturing costs increase due to a large number of components.

[0004] In addition, the sensing device detects the position of the magnet based on a change in a magnetic flux density of the magnet. However, the conventional sensing device has a problem in that a gauss value of the magnet is measured non-linearly. Accordingly, an error in detection occurs, thereby reducing measurement accuracy of the sensing device. SUMMARY

[0005] TECHNICAL PROBLEM

[0006] The present invention relates to a sensing device in which manufacturing costs are reduced by simplifying components and measurement accuracy is improved by ensuring linearity of a gauss value of a magnet.

[0007] TECHNICAL SOLUTION

[0008] Embodiments can provide a sensing device including a magnet, a collector disposed to correspond to a path along which the magnet moves, and a first sensor disposed in the collector, wherein the collector includes a first leg, a second leg, and a third leg, the magnet includes a first magnetic pole and a second magnetic pole, the first leg and the second leg are disposed to face the first magnetic pole, and the third leg is disposed to face the second magnetic pole.

[0009] Embodiments can provide a sensing device including a magnet, a collector disposed to correspond to a path along which the magnet moves, a first sensor disposed in the collector, and a second sensor disposed on an opposite side of the first sensor with respect to the magnet, wherein the collector includes a first leg, a second leg, and a third leg, the first sensor is disposed between the first leg and the third leg, and the second sensor is disposed between the second leg and the third leg.

[0010] An embodiment can provide a sensing device including a magnet, and a collector disposed to correspond to a path along which the magnet moves, wherein the collector includes a first leg disposed at a circumference of an upper end of the magnet, a second leg disposed at a circumference of a lower end of the magnet, and a third leg having one side facing the first leg and the other side facing the second leg, and a position of the magnet is determined by a difference between a position of the magnet detected by using the first leg and the third leg and a position of the magnet detected by using the second leg and the third leg.

[0011] The first leg and the second leg can be positioned out of a plane.

[0012] A distance between the first leg and the third leg can include an area increasing from one side to the other side, and a distance between the second leg and the third leg includes an area increasing from the other side to the one side.

[0013] The third leg can include a third inclined area inclined with respect to a moving direction of the magnet.

[0014] A thickness of the third leg can be greater than a thickness of each of the first leg and the second leg.

[0015] A distance between the first leg and the magnet can increase as the first leg moves from an initial position, and a distance between the second leg and the magnet can decrease as the second leg moves from the initial position.

[0016] The third leg and the magnet can be spaced apart by a first distance at a first position, the third leg and the magnet can be spaced apart by a second distance at a second position spaced apart from the first position, and the first distance and the second distance can be the same.

[0017] The third leg can include a first portion facing the first leg, a second portion facing the second leg, and a third portion connecting the first portion and the second portion.

[0018] An embodiment can provide a sensing device including a magnet, a stator disposed on a path on which the magnet moves, and a Hall sensor disposed to face the magnet, wherein the magnet moves in a first direction, the stator includes a first portion facing the magnet and a second portion, a width of the first portion decreases in the first direction, and a width of the second portion increases in the first direction.

[0019] A ratio at which the width of the first portion decreases in the first direction can be equal to a ratio at which the width of the second portion increases in the first direction.

[0020] The magnet can move in the first direction with respect to the stator.

[0021] The magnet can be disposed between the first portion and the second portion.

[0022] The width of one end of the first portion can be equal to the width of the other end of the second portion.

[0023] The stator can include a third portion connecting the first portion and the second portion, and the third portion can have a third width, which is a width in a third direction, that is greater than a width of the magnet in the third direction.

[0024] Embodiments can provide a sensing device including a first magnet, a second magnet spaced apart from the first magnet, a first stator disposed on a path along which the first magnet moves, a second stator disposed on a path along which the second magnet moves, and a Hall sensor disposed to face the first magnet and the second magnet, wherein the first magnet and the second magnet move in a first direction, the first stator includes a 1A portion and a 2A portion facing the first magnet, the second stator includes a 1B portion and a 2B portion facing the second magnet, the 1A portion and the 1B portion decrease in width in the first direction, and the 2A portion and the 2B portion increase in width in the first direction.

[0025] A ratio at which the width of the 1A portion and the width of the 1B portion decrease in the first direction can be equal to a ratio at which the width of the 2A portion and the width of the 2B portion increase in the first direction.

[0026] The first magnet and the second magnet can move in the first direction with respect to the first stator and the second stator, respectively.

[0027] The first magnet can be disposed between the 1A portion and the 2A portion, and the second magnet can be disposed between the 1B portion and the 2B portion.

[0028] The sensing device can include a first housing in which the first stator and the second stator are disposed, and a magnet holder on which the first magnet and the second magnet are disposed, wherein the first housing and the magnet holder can be connected in a manner that is slidably movable in the first direction.

[0029] The first housing can include a first groove extending in the first direction, and the magnet holder can include a first protrusion disposed in the first groove to be slidably movable in the first direction.

[0030] The sensing device can include a printed circuit board (PCB) connected to the Hall sensor.

[0031] The sensing device can include a second housing combined to the first housing, and the PCB can be disposed in the second housing.

[0032] The sensing device can include a first collector and a second collector, wherein the Hall sensor is interposed between the first collector and the second collector, wherein the first collector and the second collector can be disposed between the first stator and the second stator.

[0033] The first collector can include a first body and a first leg extending from the first body, the second collector can include a second body and a second leg extending from the second body, and the Hall sensor can be disposed between the first leg and the second leg.

[0034] The first leg can be disposed closer to the second body than the first body, and the second leg can be disposed closer to the first body than the second body.

[0035] The first leg includes a first extension connected to the first body and a first curved portion curved from the first extension, the second leg can include a second extension connected to the second body and a second curved portion extending from the second extension, the first extension and the second extension can not overlap in the third direction, and the first curved portion and the second curved portion can overlap in the third direction.

[0036] The first leg can be disposed closer to the second body than the first body, and the second leg can be disposed closer to the first body than the second body.

[0037] The first leg includes a first extension connected to the first body and a first curved portion curved from the first extension, the second leg can include a second extension connected to the second body and a second curved portion extending from the second extension, the first extension and the second extension can not overlap in the third direction, and the first curved portion and the second curved portion can overlap in the third direction.

[0038] Advantageous effects

[0039] According to the embodiment, the number of components of the sensing device can be reduced by sharing a collector for collecting magnetic fields of a plurality of sensors, thereby reducing manufacturing costs.

[0040] According to the embodiment, a sensing device having improved measurement accuracy can be provided by ensuring linearity of the gauss value of the magnet.

[0041] According to the embodiment, a sensing device that is advantageous for compensation of external impedance can be provided by improving the shape of the collector. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 is a perspective view showing a sensing device according to one embodiment.

[0043] Figure 2is a diagram schematically showing a state in which the sensing device according to one embodiment is installed in a vehicle steering structure.

[0044] Figure 3 is a side view showing the sensing device according to one embodiment.

[0045] Figure 4 is a plan view showing the sensing device according to one embodiment.

[0046] Figure 5 is a side view showing the sensing device according to another embodiment.

[0047] Figure 6 is a plan view showing the sensing device according to another embodiment. Figure 5 is an enlarged view of the area A of

[0048] Figure 7 is a side view showing the sensing device according to still another embodiment.

[0049] Figure 8 is a side view showing Figure 7 the third leg portion and the magnet shown in

[0050] Figure 9 is a plan view showing a path along which the magnet moves in the sensing device according to one embodiment.

[0051] Figure 10 is a plan view showing a flow of a magnetic field generated by the magnet in the sensing device according to one embodiment.

[0052] Figure 11 is a diagram showing a result of measuring a magnetic flux density using the sensing device according to one embodiment in a state in which an external magnetic field is not introduced.

[0053] Figure 12 is a diagram showing a result of measuring a magnetic flux density using the sensing device according to one embodiment in a state in which an external magnetic field is introduced.

[0054] Figure 13 is a perspective view showing the sensing device according to one embodiment.

[0055] Figure 14 is a diagram schematically showing a state in which the sensing device according to one embodiment is installed in a vehicle steering structure.

[0056] Figure 15 is an exploded perspective view showing the sensing device according to one embodiment.

[0057] Figure 16 is a front view showing a state in which the housing is removed from the sensing device according to one embodiment.

[0058] Figure 17is a perspective view showing a stator of a sensing device according to one embodiment.

[0059] Figure 18 is a perspective view showing a first stator and a second stator of a sensing device according to one embodiment.

[0060] Figure 19 is a front view showing a first stator and a second stator of a sensing device according to one embodiment.

[0061] Figure 20 is a side view showing a magnet, a stator, and a Hall sensor of a sensing device according to one embodiment.

[0062] Figure 21 is a front view showing a magnet, a stator, and a Hall sensor of a sensing device according to one embodiment.

[0063] Figure 22 is a diagram showing a flow of magnetic flux induced by a first magnet and a second magnet disposed at a first position in a sensing device according to one embodiment.

[0064] Figure 23 is a diagram showing a flow of magnetic flux induced by a first magnet and a second magnet disposed at a second position in a sensing device according to one embodiment.

[0065] Figure 24 is a diagram showing a flow of magnetic flux induced by a first magnet and a second magnet disposed at a third position in a sensing device according to one embodiment.

[0066] Figure 25 is a diagram showing a variation in Gauss for each position of a magnet of a sensing device according to one embodiment.

[0067] Figure 26 is a bottom view showing a first housing of a sensing device according to one embodiment.

[0068] Figure 27 is a perspective view showing a state in which a first magnet, a second magnet, and a magnet holder of a sensing device according to one embodiment are combined.

[0069] Figure 28 is a perspective view showing a state in which a second housing of a sensing device according to one embodiment is combined to a printed circuit board and a Hall sensor of the sensing device.

[0070] Figure 29 is a perspective view showing a collector of a sensing device according to one embodiment.

[0071] Figure 30 is a plan view showing a collector of a sensing device according to one embodiment.

[0072] Figure 31 is an exploded perspective view illustrating a sensing device according to another embodiment.

[0073] Figure 32 is a front view illustrating a state in which a housing is removed from a sensing device according to another embodiment.

[0074] Figure 33 is a plan view illustrating a state in which a housing is removed from a sensing device according to another embodiment.

[0075] Figure 34 is a perspective view illustrating a collector and a Hall sensor of a sensing device according to another embodiment.

[0076] Figure 35 is a plan view illustrating a collector and a Hall sensor of a sensing device according to another embodiment.

[0077] Figure 36 is a front view illustrating a collector and a Hall sensor of a sensing device according to another embodiment.

[0078] Figure 37 is a graph illustrating a variation in gauss measured by a first stator and a second stator of a sensing device according to an embodiment. DETAILED DESCRIPTION

[0079] Hereinafter, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0080] Figure 1 is a perspective view illustrating a sensing device according to an embodiment, Figure 2 is a graph schematically illustrating a state in which a sensing device according to an embodiment is installed in a vehicle steering structure.

[0081] The sensing device 100 according to an embodiment of the present application can be installed in a steering structure 20 of a vehicle, but the present application is not limited thereto. The sensing device 100 according to an embodiment of the present application can be widely applied to measure displacement of a structure performing linear motion.

[0082] Referring to Figure 1 and Figure 2 , the sensing device 100 can include a magnet 110, a collector 120, a first sensor 130, and a second sensor 140. In addition, the steering structure 20 of the vehicle can include a driving member 21 and a fixed member 22.

[0083] The driving member 21 can be linearly moved. On the other hand, the fixed member 22 can be fixed in position. The driving member 21 and the fixed member 22 are connected to be movable relative to each other. The driving member 21 can be exemplified as a rack, and the fixed member 22 can be a rack cover surrounding one side of the rack, and the present application is not limited thereto. Here, the driving member 21 can be coupled to the magnet 110, and the fixed member 22 can be coupled to the collector 120, the first sensor 130, and the second sensor 140.

[0084] The magnet 110 generates a magnetic field. The magnet 110 can include a first magnetic pole 111 and a second magnetic pole 112. Here, the first magnetic pole 111 can be an S pole. Also, the second magnetic pole 112 can be an N pole. However, the present application is not limited thereto, the first magnetic pole 111 can be an N pole, and the second magnetic pole 112 can be an S pole.

[0085] The magnet 110 can be linearly moved together with the driving member 21. In this case, a moving direction of the magnet 110 can be perpendicular to an arrangement direction of the first magnetic pole 111 and the second magnetic pole 112. Here, a direction parallel to the arrangement direction of the first magnetic pole 111 and the second magnetic pole 112 is set as a first direction, a direction parallel to the moving direction of the magnet 110 is set as a second direction, and a direction perpendicular to the first direction and the second direction is set as a third direction.

[0086] The collector 120 is disposed to correspond to a path along which the magnet 110 moves. A gap 120G can be formed in the collector 120. The magnet 110 is disposed to be movable in the gap 120G. The magnet 110 can move in the gap 120G to generate a magnetic field, and the collector 120 can collect the magnetic field generated by the magnet 110. Here, the collector 120 can include a first leg 121, a second leg 122, and a third leg 123.

[0087] The first sensor 130 and the second sensor 140 can detect the intensity of the magnetic field, i.e., the magnetic flux density, collected by the collector 120. The first sensor 130 and the second sensor 140 can detect the position of the magnet 110 based on a difference between the magnetic flux density detected using the collector 120 and the magnetic flux density detected using the collector 120. Here, the first sensor 130 and the second sensor 140 can be disposed to be opposite to each other with respect to the magnet. The first sensor 130 and the second sensor 140 can be disposed on the collector 120.

[0088] Figure 3 FIG. 1 is a side view showing a sensing device according to one embodiment, and Figure 4 FIG. 2 is a plan view showing a sensing device according to one embodiment.

[0089] Referring to Figure 3The magnet 110 can be conveniently divided into a first part P1 and a second part P2. The first part P1 and the second part P2 can be arranged in a third direction. The first part P1 and the second part P2 can have the same size. This division is only used to clearly describe embodiments of the invention, and the first part P1 and the second part P2 can be integrated together. In this case, the first part P1 is set as the upper end, and the second part P2 is set as the lower end.

[0090] Collector 120 may include a first leg 121, a second leg 122, and a third leg 123A. The first leg 121 may be disposed on the outer periphery of the first portion P1. The second leg 122 may be disposed on the outer periphery of the second portion P2. The third leg 123A may be positioned so that one side faces the first leg 121 and the other side faces the second leg 122. Furthermore, the first leg 121 and the second leg 122 may be spaced apart from each other in a third direction. The first leg 121 and the second leg 122 may be positioned skewed. In this case, the shortest distance D1 between the first leg 121 and the second leg 122 may be less than the length (L) of the magnet 110. m Here, the length of magnet 110 refers to the length of magnet 110 between its two ends in the third direction.

[0091] The third leg 123A can be configured to have a predetermined tilt angle ∠a relative to the second direction.

[0092] Reference Figure 4 The first leg 121 and the third leg 123A may be spaced apart from each other in a first direction. Additionally, the second leg 122 and the third leg 123A may also be spaced apart from each other in the first direction. In this case, a portion of the magnet 110 is disposed between the first leg 121 and the second leg 122, and another portion of the magnet 110 may be disposed between the second leg 122 and the third leg 123A. Here, the first leg 121 may include a region that moves away from the magnet 110 as it moves toward one side in a second direction. Similarly, the second leg 122 may include a region that moves away from the magnet 110 as it moves toward the side opposite to one side in a second direction. On the other hand, the third leg 123A may maintain a constant distance from the magnet 110 regardless of its position in the second direction.

[0093] The distance D2 between the first leg 121 and the third leg 123A can be greater than the width W of the magnet 110. M Here, the width of magnet 110 refers to the length of magnet 110 between its two ends disposed in the first direction. Here, the distance D2 between the first leg 121 and the third leg 123A can vary depending on their positions in the second direction. The distance D3 between the second leg 122 and the third leg 123A can be greater than the width W of magnet 110.M Similarly, the distance D3 between the second leg 122 and the third leg 123A can vary depending on the position in the second direction.

[0094] The first leg 121 and the second leg 122 can be disposed to face the second magnetic pole 112. In addition, the third leg 123A can be disposed to face the first magnetic pole 111. The first sensor 130 can be disposed between the first leg 121 and the third leg 123A. The first sensor 130 can be coupled to an end portion of the third leg 123A. In addition, the second sensor 140 can be disposed between the second leg 122 and the third leg 123A. The second sensor 140 can be coupled to an end portion of the second leg 122. In this sensing device, the position of the magnet 110 can be determined by using the difference between the position of the magnet 110 detected using the first leg 121 and the third leg 123A and the position of the magnet 110 detected using the second leg 122 and the third leg 123A. With this structure, the present application can share a collector that collects magnetic fields of a plurality of sensors. Accordingly, the number of components can be reduced, and manufacturing costs can be reduced.

[0095] Figure 5 is a side view showing a sensing device according to another embodiment, and Figure 6 is Figure 5 an enlarged view of the area A of Figure 3 has substantially the same sensing device as the sensing device shown in Figure 3 . Accordingly, the same components as those shown in are given the same reference numerals, and a repeated description of those components will be omitted.

[0096] Referring to Figure 5 , the third leg 123B can have a thickness different from the thickness of the first leg 121 and the second leg 122. Here, the thickness of the leg refers to the length of the leg disposed between both end portions of the leg in the third direction. The thickness of the third leg 123B can be greater than the thickness of each of the first leg 121 and the second leg 122.

[0097] Referring to Figure 6 , the thickness T B of the third leg 123B can be less than the shortest distance D4 between the first leg 121 and the second leg 122. At this time, the third leg 123B can be disposed to have an inclination angle ∠b with respect to the second direction. Here, the inclination angle ∠b of the third leg 123B described with reference to Figure 6 may be less than the inclination angle ∠b of the third leg 123B described with reference to Figure 3An inclination angle ∠a of the third leg 123A is described. Meanwhile, although different from that shown in the drawing, a thickness TB of the third leg 123B can be greater than the shortest distance D4 between the first leg 121 and the second leg 122. In this case, the third leg 123B can be disposed parallel to the second direction.

[0098] Figure 7 is a side view showing a sensing device according to still another embodiment, and Figure 8 is a side view showing Figure 7 a third leg and a magnet shown in Figure 3 has substantially the same sensing device as the sensing device shown in Figure 3 embodiments. Therefore, components identical to those shown in

[0099] Referring to Figure 7 , the third leg 123C can include a first portion 1231, a second portion 1232, and a third portion 1233. The first portion 1231, the second portion 1232, and the third portion 1233 can be integrated together. The first portion 1231, the second portion 1232, and the third portion 1233 can be formed by bending a single bar member.

[0100] The first portion 1231 can be disposed to face the first leg 121. The first portion 1231 can be disposed parallel to the first leg 121. In this case, the first sensor 130 can be disposed between the first portion 1231 and the first leg 121. The first sensor 130 can be bonded to any one selected from the first portion 1231 and the first leg 121.

[0101] The second portion 1232 can be disposed to face the second leg 122. The second portion 1232 can be disposed parallel to the second leg 122. In this case, the second sensor 140 can be disposed between the second leg 122 and the second portion 1232. The second sensor 140 can be bonded to any one selected from the second portion 1232 and the second leg 122.

[0102] The third portion 1233 can connect the first portion 1231 and the second portion 1232. One end of the third portion 1233 can extend from the first portion 1231, and the other end of the third portion 1233 can extend from the second portion. Here, the third portion 1233 can be disposed at the center of the third leg 123C.

[0103] Referring to Figure 8The length of the third portion 1233 in the second direction can be smaller than the moving length of the magnet 110. Also, the length of the third portion 1233 in the second direction can be greater than the thickness T3 of the third portion 1233. Here, the thickness of the third portion 1233 refers to the length of the third portion 1233 disposed between both end portions of the third portion 1233 in the third direction. In this case, the third portion 1233 can be disposed to have a predetermined inclination angle ∠c with respect to the second direction. The inclination angle ∠c of the third portion 1233 of the sensing device according to the present embodiment can be greater than the inclination angle ∠a of the third leg portion 123A of the sensing device as shown in FIG. 1. Meanwhile, the length of the third portion 1233 in the second direction can be equal to the thickness T3 of the third portion 1233. In this case, the third portion 1233 can be disposed to be perpendicular to the second direction. Figure 3

[0104] Figure 9 is a plan view showing a path along which a magnet moves in a sensing device according to one embodiment.

[0105] Referring to Figure 9 , the magnet 110 moves linearly in the second direction. At this time, the magnet 110 can start moving with an initial position of a middle point C between the first sensor 130 and the second sensor 140. The position of the magnet 110 can be determined by a difference between the position of the magnet detected using the first leg portion 121 and the third leg portion 123 and the position of the magnet detected using the second leg portion 122 and the third leg portion 123.

[0106] The magnet 110 can move between a first position S1 and a second position S2. The first position S1 and the second position S2 are spaced apart from each other in the second direction. The first position S1 is disposed closest to the first sensor 130. In this case, the first position S1 is spaced apart from the first sensor 130 by a predetermined distance in the second direction. Also, the second position S2 is disposed closest to the second sensor 140. The second position S2 is spaced apart from the second sensor 140 by a predetermined distance in the second direction. At this time, the distance between the first leg portion 121 and the third leg portion 123 can decrease from the initial position to the first position S1. Also, the distance between the second leg portion 122 and the third leg portion 123 can decrease from the first position S1 to the second position S2.

[0107] ​At the first position S1, the distance from the first point of magnet 110 to the third leg 123 is the shortest. Here, the first point of magnet 110 and the third leg 123 are spaced apart by a first distance. Similarly, at the second position S2, the distance from the second point of magnet 110 to the third leg 123 is the shortest. Here, the second point of magnet 110 and the third leg 123 are spaced apart by a second distance. In this case, the first and second distances can be the same. Alternatively, the first and second points can be different. That is, regardless of the position of magnet 110 in the second direction, the shortest distance between magnet 110 and the third leg 123 can be constant. However, the point of magnet 110 that forms the shortest distance with the third leg 123 can change depending on the position of magnet 110 in the second direction.

[0108] Figure 10 This is a plan view illustrating the flow of a magnetic field generated by a magnet in a sensing device according to one embodiment.

[0109] Reference Figure 10 In the sensing device according to the present invention, as the magnet moves, a magnetic field flows in different directions. At this time, a first magnetic field M1 and a second magnetic field M2 can be generated in the collector 120.

[0110] The first magnetic field M1 can move along the first leg 121 from the position of the magnet 110 toward the first sensor 130. Additionally, the first magnetic field M1 can pass through the first sensor and move to the third leg 123. The first magnetic field M1 can move along the third leg 123 to the position of the magnet 110.

[0111] The second magnetic field M2 can move along the second leg 122 from the position of the magnet 110 toward the second sensor 140. Additionally, the second magnetic field M2 can pass through the second sensor 140 and move toward the third leg 123. The second magnetic field M2 can move along the third leg 123 to the position of the magnet 110. The first magnetic field M1 and the second magnetic field M2 can be generated from the position of the magnet 110 in opposite directions.

[0112] Figure 11 This is a graph showing the results of measuring magnetic flux density using a sensing device according to one embodiment without the introduction of an external magnetic field. Figure 12 This is a graph showing the results of measuring magnetic flux density using a sensing device according to one embodiment under the condition of introducing an external magnetic field.

[0113] In the figure, the vertical axis represents the magnetic flux density, and the horizontal axis represents the magnet displacement in the first direction. Here, the magnetic flux density detected using the first collector is denoted as the first magnetic flux F1, and the magnetic flux density detected using the second collector is denoted as the second magnetic flux F2.

[0114] Referring to Figure 11 It can be seen that, in the sensing device, the magnetic flux density of the first magnetic flux F1 changes according to the magnet displacement, and the second magnetic flux F2 changes in inverse proportion to the change value of the first magnetic flux F1. At this time, the first magnetic flux F1 and the second magnetic flux F2 can be represented by a curve symmetrical with respect to the magnetic displacement 0. Therefore, it can be seen that the difference (F1-F2) between the first magnetic flux F1 and the second magnetic flux F2 linearly decreases or linearly increases according to the magnetic displacement.

[0115] Meanwhile, referring to Figure 12 It can be seen that, as the external magnetic field is introduced, both the first magnetic flux F1 and the second magnetic flux F2 are shifted, but the difference (F1-F2) between the first magnetic flux F1 and the second magnetic flux F2 is not affected. The sensing device according to the embodiment can maintain the linearity of the magnet magnetic flux even when the external magnetic field is applied, and by improving the linearity of the magnetic flux, the magnet displacement can be more accurately detected.

[0116] Figure 13 is a perspective view showing a sensing device according to an embodiment, Figure 14 is a diagram schematically showing a state in which a sensing device according to one embodiment is installed in a vehicle steering structure, Figure 15 is an exploded perspective view showing a sensing device according to an embodiment.

[0117] The sensing device 210 according to the embodiment of the present application can be installed in a steering structure 220 of a vehicle, but the present application is not limited thereto. The sensing device 210 according to the embodiment of the present application can be widely applied to measure the displacement of a structure performing linear motion.

[0118] Referring to Figure 13 to Figure 15 , the sensing device 210 according to the present application can include a housing 2100, a magnet 2200, a stator 2300, a collector 2400, a Hall sensor 2500, and a printed circuit board 2600.

[0119] The sensing device 210 can be connected to a steering structure 220 of a vehicle. The steering structure 220 of the vehicle can include a driving member 221 and a fixed member 222. The driving member 221 and the fixed member 222 can be disposed between two wheels 223. The driving member 221 can be linearly moved. The driving member 221 can reciprocate between the two wheels 223. On the other hand, the fixed member 222 can be disposed at a fixed position between the two wheels 223. Here, the driving member 221 and the fixed member 222 can be connected to each other to be relatively movable. The driving member 221 can be exemplified as a rack, and the fixed member 222 can be a rack cover disposed in the rack, but the present application is not limited thereto.

[0120] The housing 2100 can form the outside of the sensing device 210. The housing 2100 can be coupled to the fixing member 222. The housing 2100 can include a first housing 2110 and a second housing 2120. In addition, the magnet 2200, the stator 2300, the collector 2400, and the Hall sensor 2500 can be disposed in the first housing 2110. In addition, the printed circuit board 2600 can be disposed in the second housing 2120.

[0121] The magnet 2200 can be coupled to the driving member 221. In addition, the stator 2300, the Hall sensor 2500, and the housing 2100 can be coupled to the fixing member 222. The magnet 2200 generates a magnetic field. The magnet 2200 can include a first magnetic pole and a second magnetic pole. Here, the first magnetic pole can be an S pole. In addition, the second magnetic pole can be an N pole. The magnet 2200 can be disposed on the driving member 221. The magnet 2200 can linearly move according to the movement of the driving member 221. The magnet 2200 can reciprocate between the two wheels 223.

[0122] The stator 2300 can be disposed in the housing 2100. In addition, the stator 2300 can be disposed on a path along which the magnet 2200 moves.

[0123] The collector 2400 can collect the magnetic flux of the stator 2300. The collector 2400 can be disposed adjacent to the stator 2300. Here, the collector 2400 can be made of a metal material, but the present application is not limited thereto.

[0124] The Hall sensor 2500 can be disposed on the collector 2400. In addition, the Hall sensor 2500 can be disposed to face the magnet 2200. The Hall sensor 2500 can detect a change in magnetic charge. The Hall sensor 2500 can be a Hall integrated circuit (IC).

[0125] The Hall sensor 2500 can be mounted on the printed circuit board 2600. The printed circuit board 2600 can be a printed circuit board (PCB).

[0126] Figure 16 is a front view showing a state in which the housing is removed from the sensing device according to one embodiment, Figure 17 is a perspective view showing a stator of a sensing device according to one embodiment.

[0127] Referring to 16 and Figure 17 The magnet 2200 can include a first magnet 2210 and a second magnet 2220.

[0128] The first magnet 2210 and the second magnet 2220 can be disposed in the third direction. Here, the first magnet 2210 and the second magnet 2220 can have the same size, but the present application is not limited thereto. The shape and size of the first magnet 2210 and the second magnet 2220 can be variously designed and modified.

[0129] The first magnet 2210 and the second magnet 2220 can be disposed in different stators 2300. In this case, the first magnet 2210 and the second magnet 2220 can reciprocate and linearly move in the stators 2300, respectively. The moving speed of the first magnet 2210 and the second magnet 2220 can be the same. The first magnet 2210 and the second magnet 2220 can be combined by a magnet holder (not shown). The first magnet 2210 and the second magnet 2220 can overlap in the third direction.

[0130] The stator 2300 can be a rectangular member having a length longer than its width. The stator 2300 can be disposed along the moving direction of the magnet 2200. The stator 2300 can include an opposite surface facing the magnet 2200. Here, as the stator 2300 moves, the area of the opposite surface of the stator 2300 changes, and thus the magnetization amount changes.

[0131] The stator 2300 can include a first portion 2301, a second portion 2302, and a third portion 2303.

[0132] The first portion 2301 and the second portion 2302 can be spaced apart from each other in the third direction. The first portion 2301 and the second portion 2302 can be disposed in parallel. In addition, a space for disposing the magnet 2200 can be formed between the first portion 2301 and the second portion 2302.

[0133] The first portion 2301 and the second portion 2302 can each have a width greater than a thickness. In the present specification, the thickness refers to a length in the first direction, and the width refers to a length in the second direction. The first portion 2301 can have a first width. The first width refers to the length of the first portion 2301 in the second direction. The first width can decrease in the first direction. In this case, the ratio at which the first width decreases in the first direction can be the same as the ratio at which the second width decreases in the first direction.

[0134] The first portion 2301 can include a first inclined portion 2301A. The first inclined portion 2301A can be disposed at an end of the first portion 2301. The first inclined portion 2301A can be disposed to be inclined at a predetermined angle with respect to the first direction. The first inclined portion 2301A can be closer to the third portion 2303 in the first direction.

[0135] The second portion 2302 can have a second width. The second width refers to a length of the second portion 2302 in the second direction. The second width can increase in the first direction. The second portion 2302 can include a second inclined portion 2302A. The second inclined portion 2302A can be disposed at an end of the second portion 2302. The second inclined portion 2302A can be disposed to be inclined at a predetermined angle with respect to the first direction. In this case, the angle at which the second inclined portion 2302A is inclined and the angle at which the first inclined portion 2301A is inclined can be opposite in direction. The second inclined portion 2302A can move away from the third portion 2303 as it moves in the first direction.

[0136] The third portion 2303 can connect the first portion 2301 and the second portion 2302. The third portion 2303 can be disposed perpendicular to each of the first portion 2301 and the second portion 2302. In this case, the first portion 2301 can be bent and extended from one end of the first portion 2301. Also, the second portion 2302 can be bent and extended from the other end of the third portion 2303.

[0137] Figure 18 is a perspective view illustrating a first stator and a second stator of a sensing device according to one embodiment, Figure 19 is a front view illustrating a first stator and a second stator of a sensing device according to one embodiment, and Figure 20 is a side view illustrating a magnet, a stator, and a Hall sensor of a sensing device according to one embodiment.

[0138] Referring to Figure 18 to Figure 20 , the stator 2300 can include a first stator 2310 and a second stator 2320.

[0139] The first stator 2310 and the second stator 2320 can be disposed to be spaced apart from each other in a third direction. The first stator 2310 and the second stator 2320 can be members of the same shape. However, the present application is not limited thereto. The first stator 2310 and the second stator 2320 can have the same shape as Figure 18 the stator 2300 of FIG. 1.

[0140] The first stator can include a 1st A portion 2311, a 2nd A portion 2312, and a 3rd A portion 2313. Here, the 1st A portion 2311, the 2nd A portion 2312, and the 3rd A portion 2313 can have the same shapes as the first portion 2301, the second portion 2302, and the third portion 2303 of the stator 2300, respectively. Also, the second stator 2320 can include a 1st B portion 2321, a 2nd B portion 2322, and a 3rd B portion 2323. Similarly, the 1st B portion 2321, the 2nd B portion 2322, and the 3rd B portion 2323 can have the same shapes as the first portion 2301, the second portion 2302, and the third portion 2303 of the stator 2300, respectively.

[0141] The first stator 2310 can have a first gap G1. The first gap G1 can be disposed between the 1st A portion 2311 and the 2nd A portion 2312. Also, the first gap G1 can be open toward opposite sides of the 3rd A portion 2313. The first magnet 2210 can be disposed in the first gap G1. Here, a distance D G between the 1st A portion 2311 and the 2nd A portion 2312 can be greater than a width of the first magnet 2210 in the third direction.

[0142] The second stator 2320 can include a second gap G2. The second gap G2 can be disposed between the 1st B portion 2321 and the 2nd B portion 2322. The second gap G2 can be open toward opposite sides of the 3rd B portion 2323. The second magnet 2220 can be disposed in the second gap G2. Here, a distance between the 1st B portion 2321 and the 2nd B portion 2322 can be equal to the distance D G between the 1st A portion 2311 and the 3rd A portion 2313. Also, the distance between the 1st B portion 2321 and the 2nd B portion 2322 can be greater than a width of the second magnet 2220 in the third direction.

[0143] At one end of the first stator 2310, a first width of the 1st A portion 2311 and a second width of the 2nd A portion 2312 can be different from each other. In this case, the first width can be greater than the second width. Also, at the one end of the first stator 2310, the first width can have a maximum value W max , and the second width can have a minimum value W min . On the contrary, at the other end of the first stator 2310, the first width can have a minimum value, and the second width can have a maximum value. The description of the first stator 2310 can be equally applied to the second stator 2320.

[0144] The magnet 2200 can move linearly along the stator 2300. Here, the stator 2300 can include a first end portion 2300S1 and a second end portion 2300S2 disposed in a first direction. The magnet 2200 can reciprocate between the first end portion 2300S1 and the second end portion 2300S2.

[0145] At the first end portion 2300S1, a first width of the first portion 2301 can be greater than a second width of the second portion 2302. In this case, the first width of the first portion 2301 at the first end portion 2300S1 can have a maximum value W max On the other hand, the second width of the second portion 2302 at the first end portion 2300S1 can have a minimum value W min In addition, at the second end portion 2300S2, the second width of the second portion 2302 can be greater than the first width of the first portion 2301.

[0146] As the magnet 2200 moves in the first direction in the sensing device, an area facing the first portion 2301 can gradually decrease. On the other hand, as the magnet 2200 moves in the first direction, an area facing the second portion 2302 can gradually increase. In this case, the area in which the magnet 2200 and the first portion 2301 face each other and the area in which the magnet 2200 and the second portion 2302 face each other can be constant in size regardless of the position in the first direction.

[0147] Figure 21 FIG. 1 is a front view illustrating a magnet, a stator, and a Hall sensor of a sensing device according to one embodiment.

[0148] Referring to Figure 21 , a first magnet 2210 and a second magnet 2220 can be magnetized. The magnetization directions of the first magnet 2210 and the second magnet 2220 can be oriented in the arrow direction. The magnetization direction of the first magnet 2210 can face the second magnet 2220. Meanwhile, the magnetization direction of the second magnet 2220 can face the first magnet 2210.

[0149] The first magnet 2210 and the second magnet 2220 can each be disposed inside a first stator 2310 and a second stator 2320. In this case, one surface of each of the first magnet 2210 and the second magnet 2220 can face the first stator 2310 or the second stator 2320. On the other hand, the other surface of each of the first magnet 2210 and the second magnet 2220 can not face the first stator 2310 or the second stator 2320. According to the present embodiment, the first magnet 2210 can include a first cross-section 2210A that does not face the first stator 2310. In addition, the second magnet 2220 can include a second cross-section 2220A that does not face the second stator 2320.

[0150] The collector 2400 can be disposed between the first magnet 2210 and the second magnet 2220 with respect to the third direction. Here, a distance D between the first magnet 2210 and the second magnet 2220 can be greater than a width of the collector 2400 in the third direction.

[0151] Figure 22 is a diagram illustrating a flow of magnetic flux of the first magnet and the second magnet disposed in the central portion of the stator.

[0152] Referring to Figure 22 , the first magnet 2210 can be disposed in the first end portion 2300S1 of the first stator 2310, and the second magnet 2220 can be disposed in the first end portion 2300S1 of the second stator 2320. The first magnet 2210 and the second magnet 2220 can overlap in the third direction regardless of the position in the first direction. That is, the first magnet 2210 and the second magnet 2220 can move at the same speed.

[0153] Magnetic flux generated by the first magnet 2210 and the second magnet 2220 can be induced along arrows as illustrated in Figure 22 . The magnetic flux generated by the second magnet 2220 can be induced to the second stator 2320. At this time, the magnetic flux induced to the second stator 2320 can be induced to the second collector 2420. In addition, the magnetic flux induced to the second collector 2420 can pass through the Hall sensor 2500, and be induced to the first collector 2410. In addition, the magnetic flux induced to the first collector 2410 can be induced to the first stator 2310 and flow in one direction. Here, the magnetic flux induced to the first stator 2310 can flow toward the opposite side of the second magnet 2220.

[0154] Figure 23 is a diagram illustrating a flow of magnetic flux of the first magnet and the second magnet disposed in the central portion of the stator.

[0155] Referring to Figure 23 , the first magnet 2210 can be disposed in the central portion of the first stator 2310. In addition, the second magnet 2220 can be disposed in the central portion of the second stator 2320. Here, the central portion can designate a region between the first end portion 2300S1 and the second end portion 2300S2 of the stator.

[0156] Magnetic flux generated by the first magnet 2210 and the second magnet 2220 can be induced along Figure 23The magnetic flux generated by the first magnet 2210 can be induced toward the first stator 2310. Also, the magnetic flux generated by the second magnet 2220 can be induced toward the second stator 2320. Here, the direction of the magnetic flux induced toward the first stator 2310 and the direction of the magnetic flux induced toward the second stator 2320 can be opposite to each other. For example, the magnetic flux induced toward the first stator 2310 can flow counterclockwise. Also, the magnetic flux induced toward the second stator 2320 can flow clockwise.

[0157] Figure 24 FIG. 4 is a diagram illustrating the flow of the magnetic flux of the first and second magnets provided in the second end portion of the stator.

[0158] Referring to Figure 24 , the first magnet 2210 can be provided in the second end portion 2300S2 of the first stator 2310, and the second magnet 2220 can be provided in the second end portion 2300S2 of the second stator 2320.

[0159] The magnetic flux generated by the first magnet 2210 and the second magnet 2220 can be induced along the arrows as Figure 24 indicated in FIG. 4. The magnetic flux generated by the first magnet 2210 can be induced toward the first stator 2310. Also, the magnetic flux induced toward the first stator 2310 can be induced toward the first collector 2410. The magnetic flux induced toward the first collector 2410 can pass through the Hall sensor 2500, and be induced toward the second collector 2420. The magnetic flux induced toward the second collector 2420 can be induced toward the second stator 2320 and flow in one direction. At this time, the magnetic flux induced toward the second stator 2320 can flow toward the opposite side of the first magnet 2210.

[0160] Figure 25 FIG. 5 is a diagram illustrating the amount of change in gauss of each position of the magnet of the sensing device according to one embodiment.

[0161] Referring to Figure 22 to Figure 25 , the amount of change in gauss applied to the Hall sensor 2500 can change according to the distance between the magnets 2210 and 2220. Here, the distance refers to the distance by which the magnets 2210 and 2220 are moved in the first direction with respect to the initial position 0. Also, at the initial position 0, the magnets 2210 and 2220 can be the same distance from the first end portion 2300S1 as from the second end portion 2300S2.

[0162] The magnets 2210 and 2220 can reciprocate between the first end 2300S1 and the second end 2300S2. The first distance A refers to a distance from the initial position 0 to the first end 2300S1 in the first direction, and the second distance B refers to a distance from the initial position 0 to the second end 2300S2 in the first direction. The first distance A and the second distance B can be the same in size. The first distance A and the second distance B can each be a maximum moving distance of the magnets 2210 and 2220.

[0163] The gauss value applied to the Hall sensor 2500 can linearly increase while the magnets 2210 and 2220 move from the initial position 0 to the first distance A. On the other hand, the gauss value applied to the Hall sensor 2500 can linearly decrease while the magnets 2210 and 2220 move from the initial position 0 to the second distance B. At this time, the rate of change of the gauss value can be constant.

[0164] Figure 26 is a bottom view illustrating a first housing of a sensing device according to an embodiment, Figure 27 is a perspective view illustrating a state in which a first magnet, a second magnet, and a magnet holder of a sensing device according to an embodiment are combined.

[0165] Referring to Figure 26 The first housing 2110 can be a rectangular member having a length in the first direction that is longer than a width in the third direction. The first housing 2110 can accommodate the stator, the collector, and the Hall sensor. According to the present embodiment, the first housing 2110 can be combined to the stator, the collector, and the Hall sensor by insert molding.

[0166] The first housing 2110 can include a first accommodation portion 2111 and a second accommodation portion 2112.

[0167] The first accommodation portion 2111 can extend long in the first direction. In addition, the second accommodation portion 2112 can be spaced apart from the first accommodation portion in the third direction. The second accommodation portion 2112 can have the same length in the first direction and the width in the third direction as the first accommodation portion 2111. Here, the first stator 2310 can be disposed in the first accommodation portion 2111. In addition, the second stator 2320 can be disposed in the second accommodation portion 2112.

[0168] The first housing 2110 can include a first groove 2110G. The first groove 2110G can be disposed between the first accommodation portion 2111 and the second accommodation portion 2112. The first groove 2110G can have a length in the first direction that is longer than a width in the third direction. The magnet holder 2700 can be combined to the first groove 2110G.

[0169] Referring to Figure 27The magnet holder 2700 can include a first member 2710 and a first protrusion 2720.

[0170] The first member 2710 can be coupled to the first magnet 2210 and the second magnet 2220. Here, the first member 2710 can include a 1st A groove 2701 and a 2nd A groove 2702. The first magnet 2210 can be disposed in the 1st A groove 2701. Also, the second magnet 2220 can be disposed in the 2nd A groove 2702.

[0171] The first protrusion 2720 can be formed to protrude from the first member 2710. The first protrusion 2720 can be disposed between the first magnet 2210 and the second magnet 2220. At this time, the first protrusion 2720 can be disposed in the first groove 2110G. The first protrusion 2720 can be slidably coupled to the first groove 2110G in the first direction.

[0172] Figure 28 is a perspective view illustrating a state in which a second housing of a sensing device according to one embodiment is coupled to a printed circuit board and a Hall sensor of the sensing device.

[0173] Referring to Figure 28 , the second housing 2120 can include a third accommodation portion 2121. At this time, the second housing 2120 can be disposed on the first housing 2110 (of the sensing device). Figure 26 Also, the third accommodation portion 2121 can be open toward the first housing 2110. The printed circuit board 2600 can be disposed in the third accommodation portion 2121. The Hall sensor 2500 can be mounted on the printed circuit board 2600. In this case, a portion of the Hall sensor 2500 can be disposed in the first housing 2110 (of the sensing device). Figure 26

[0174] Figure 29 is a perspective view illustrating a collector of a sensing device according to one embodiment, Figure 30 is a plan view illustrating a collector of a sensing device according to one embodiment.

[0175] Referring to Figure 29 and Figure 30 , the collector 2400 can include a first collector 2410 and a second collector 2420. The first collector 2410 and the second collector 2420 can be disposed in a third direction. According to the present embodiment, the first collector 2410 and the second collector 2420 can have different shapes.

[0176] The first collector 2410 can include a first body 2411 and one or more first leg portions 2412 and 2413.

[0177] ​The first body 2411 can be connected to the stator 2300. The first body 2411 can be in contact with the first stator 2310. The first body 2411 can be formed longer in the first direction. Also, the first body 2411 can have a width greater in the second direction than a thickness in the third direction. The number of the first legs 2412 and 2413 can be the same as the number of the Hall sensors 2500. A plurality of the first legs 2412 and 2413 can be provided. The first legs 2412 and 2413 can include a 1A leg 2412 and a 1B leg 2413. The 1A leg 2412 and the 1B leg 2413 can be disposed to be spaced apart from each other in the first direction. The 1A leg 2412 and the 1B leg 2413 can have different shapes from each other.

[0178] The second collector 2420 can include a second body 2421 and one or more second legs 2422 and 2423.

[0179] The second body 2421 can be connected to the stator 2300. The second body 2421 can be in contact with the second stator 2320. The second body 2421 and the first body 2411 can be disposed in the third direction. The second body 2421 can be disposed parallel to the first body 2411. Also, the second body 2421 can have the same shape as the first body 2411. The number of the second legs 2422 and 2423 can be the same as the number of the first legs 2412 and 2413. A plurality of the second legs 2422 and 2423 can be provided. The second legs 2422 and 2423 can include a 2A leg 2422 and a 2B leg 2423. The 2A leg 2422 and the 2B leg 2423 can be disposed to be spaced apart from each other in the first direction. The 2A leg 2422 and the 2B leg 2423 can have different shapes from each other. The Hall sensor 2500 can be disposed between the 1A leg 2412 and the 2A leg 2422, or between the 1B leg 2413 and the 2B leg 2423.

[0180] The 1A leg 2412 and the 2A leg 2422 can at least partially overlap in the third direction.

[0181] The 1A leg 2412 can include a 1A support portion 24121, a 1A extension portion 24122, and a 1A curved portion 24123. The 1A support portion 24121, the 1A extension portion 24122, and the 1A curved portion 24123 can be one integral member. Also, the 1A support portion 24121, the 1A extension portion 24122, and the 1A curved portion 24123 can be bent at a predetermined angle and disposed.

[0182] The 1A support portion 24121 can be disposed on the first body 2411. The 1A support portion 24121 can extend in the longitudinal direction of the first body 2411. The 1A extension portion 24122 can extend from the 1A support portion 24121. The 1A extension portion 24122 can extend toward the second collector 2420. In addition, the 1A curved portion 24123 can extend from the 1A extension portion 24122. The 1A curved portion 24123 can extend in the first direction. The 1A curved portion 24123 can be disposed between the first body 2411 and the second body 2421 with respect to the third direction. The 1A curved portion 24123 can be disposed closer to the second body 2421 than the first body 2411.

[0183] The 2A leg portion 2422 can include a 2A support portion 24221, a 2A extension portion 24222, and a 2A curved portion 24223. The 2A support portion 24221, the 2A extension portion 24222, and the 2A curved portion 24223 can be one integral member. The 2A support portion 24221, the 2A extension portion 24222, and the 2A curved portion 24223 can be bent and disposed at a predetermined angle. The 2A support portion 24221 can be disposed on the second body 2421. The 2A support portion 24221 can extend in the longitudinal direction of the second body 2421. In addition, the 2A extension portion 24222 can extend from the 2A support portion 24221. The 2A extension portion 24222 can extend toward the first collector 2410. In addition, the 2A curved portion 24223 can extend from the 2A extension portion 24222. The 2A curved portion 24223 can extend in the first direction. The 2A curved portion 24223 can be disposed between the first body 2411 and the second body 2421 with respect to the third direction. The 2A curved portion 24223 can be disposed closer to the first body 2411 than the second body 2421.

[0184] The 1A support portion 24121 and the 2A support portion 24221 can not overlap in the third direction. In addition, the 1A extension portion 24122 and the 2A extension portion 24222 can not overlap in the third direction. In addition, the 1A curved portion 24123 and the 2A curved portion 24223 can at least partially overlap in the third direction. The 1A curved portion 24123 and the 2A curved portion 24223 can be spaced apart from each other in the third direction. Here, the spacing distance D12 between the 1A curved portion 24123 and the 2A curved portion 24223 can be less than the spacing distance between the first collector 2410 and the second collector 2420. The Hall sensor 2500 can be disposed between the 1A curved portion 24123 and the 2A curved portion 24223.

[0185] By asymmetrically arranging the 1st A leg 2412 and the 2nd A leg 2422, the flow of the external magnetic field can be interfered. Accordingly, the Hall sensor 2500 disposed between the 1st A leg 2412 and the 2nd A leg 2422 is advantageous in compensating for the external impedance.

[0186] The 1st B leg 2413 and the 2nd B leg 2422 can overlap in the third direction.

[0187] The 1st B leg 2413 can include a 1st B support portion 24131, a 1st B extension portion 24132, and a 1st B curved portion 24133. The 1st B support portion 24131, the 1st B extension portion 24132, and the 1st B curved portion 24133 can be an integral member. In addition, the 1st B support portion 24131, the 1st B extension portion 24132, and the 1st B curved portion 24133 can be bent and disposed at a predetermined angle. The 1st B support portion 24131 can be disposed on the first body 2411. In addition, the 1st B extension portion 24132 can extend from the 1st B support portion 24131. The 1st B extension portion 24132 can extend toward the second collector 2420. In addition, the 1st B curved portion 24133 can extend from the 1st B extension portion 24132. The 1st B curved portion 24133 can extend in the first direction. The 1st B curved portion 24133 can be disposed between the first body 2411 and the second body 2421 with respect to the third direction. The 1st B curved portion 24133 can be disposed closer to the first body 2411 than the second body 2421.

[0188] The 2nd B leg 2423 can include a 2nd B support portion 24231, a 2nd B extension portion 24232, and a 2nd B curved portion 24233. The 2nd B support portion 24231, the 2nd B extension portion 24232, and the 2nd B curved portion 24233 can be an integral member. In addition, the 2nd B support portion 24231, the 2nd B extension portion 24232, and the 2nd B curved portion 24233 can be bent and disposed at a predetermined angle. The 2nd B support portion 24231 can be disposed on the second body 2421. In addition, the 2nd B extension portion 24232 can extend from the 2nd B support portion 24231. The 2nd B extension portion 24232 can extend toward the first collector 2410. In addition, the 2nd B curved portion 24233 can extend from the 2nd B extension portion 24232. The 2nd B curved portion 24233 can extend in the first direction. The 2nd B curved portion 24233 can be disposed between the first body 2411 and the second body 2421 with respect to the third direction. The 2nd B curved portion 24233 can be disposed closer to the second body 2421 than the first body 2411.

[0189] At this time, the first B support portion 24131 and the second B support portion 24231 can overlap in the third direction. Additionally, the first B extension portion 24132 and the second B extension portion 24232 can overlap in the third direction. At this time, the first B curved portion 24133 and the second B curved portion 24233 can overlap in the third direction. The first B curved portion 24133 and the second B curved portion 24233 can be spaced apart from each other in the third direction. The spacing distance D22 between the first B curved portion 24133 and the second B curved portion 24233 can be smaller than the spacing distance between the first collector 2410 and the second collector 2420. A Hall sensor 2500 can be disposed between the first B curved portion 24133 and the second B curved portion 24233.

[0190] Figure 31 This is an exploded perspective view showing a sensing device according to another embodiment. Figure 32 This is a front view showing the state of the housing being removed from the sensing device according to another embodiment. Figure 33 This is a plan view showing the state after removing the housing from the sensing device according to another embodiment. Figure 34 This is a perspective view showing the collector and Hall sensor of a sensing device according to another embodiment.

[0191] Apart from the shape of the collector 2800, this embodiment has the same characteristics as... Figure 15 The sensing device shown is substantially the same as the sensing device in the diagram. Therefore, it is similar to... Figure 15 The same parts shown are given the same reference numerals, and repeated descriptions of those parts will be omitted.

[0192] Reference Figure 31 to Figure 34 Collector 2800 may include a first collector 2810 and a second collector 2820. The first collector 2810 and the second collector 2820 may be positioned in the third direction. According to this embodiment, the first collector 2810 and the second collector 2820 may be formed with the same shape.

[0193] The first collector 2810 may include a first body 2811 and one or more first legs 2812 and 2813.

[0194] The first body 2811 can be connected to the stator 2300. The first body 2811 can be in contact with the first stator 2310. The first body 2811 can be formed longer in the first direction. Also, the first body 2811 can have a width in the third direction greater than a thickness in the second direction. The number of the first legs 2812 and 2813 can be the same as the number of the Hall sensors 2500. A plurality of the first legs 2812 and 2813 can be provided. The first legs 2812 and 2813 can include a 1A leg 2812 and a 1B leg 2813. The 1A leg 2812 and the 1B leg 2813 can be disposed to be spaced apart from each other in the first direction. The 1A leg 2812 and the 1B leg 2813 can have the same shape.

[0195] The second collector 2820 can include a second body 2821 and one or more second legs 2822 and 2823.

[0196] The second body 2821 can be connected to the stator 2300. The second body 2821 can be in contact with the second stator 2320. The second body 2821 and the first body 2811 can be disposed in the third direction. The second body 2821 can be disposed parallel to the first body 2811. Also, the second body 2821 can have the same shape as the first body 2811. The number of the second legs 2822 and 2823 can be the same as the number of the first legs 2812 and 2813. A plurality of the second legs 2822 and 2823 can be provided. The second legs 2822 and 2823 can include a 2A leg 2822 and a 2B leg 2823. The 2A leg 2822 and the 2B leg 2823 can be disposed to be spaced apart from each other in the first direction. The 2A leg 2822 and the 2B leg 2823 can have the same shape. The Hall sensors 2500 can be disposed between the 1A leg 2812 and the 2A leg 2822, or between the 1B leg 2813 and the 2B leg 2823.

[0197] Figure 35 is a plan view illustrating a collector and a Hall sensor of a sensing device according to another embodiment, Figure 36 is a front view illustrating a collector and a Hall sensor of a sensing device according to another embodiment.

[0198] Referring to Figure 35 and Figure 36 The 1A leg 2812 and the 2A leg 2822 can overlap in the third direction. Also, the 1B leg 2813 and the 2B leg 2823 can overlap in the third direction.

[0199] The 1st A leg 2812 can include a 1st A extension 28121 and a 1st A curved portion 28122. The 1st A extension 28121 and the 1st A curved portion 28122 can be an integral member. The 1st A extension 28121 and the 1st A curved portion 28122 can be bent and disposed at a predetermined angle. The 1st A extension 28121 can extend from the first body 2811 toward the second collector 2820. In the 1st A extension 28121, the width of the portion connected to the first body 2811 can be greater than the width of the end portion facing the collector 2820. The 1st A curved portion 28122 can extend from the 1st A extension 28121. The 1st A curved portion 28122 can extend in the second direction. The 1st A curved portion 28122 can be disposed between the first body 2811 and the second body 2821 with respect to the third direction. The 1st A curved portion 28122 can be disposed closer to the first body 2811 than the second body 2821.

[0200] The 2nd A leg 2822 can include a 2nd A extension 28221 and a 2nd A curved portion 28222. The 2nd A extension 28221 and the 2nd A curved portion 28222 can be an integral member. The 2nd A extension 28221 and the 2nd A curved portion 28222 can be bent and disposed at a predetermined angle. The 2nd A extension 28221 can extend from the second body 2821 toward the first collector 2810. In the 2nd A extension 28221, the width of the portion connected to the second body 2821 can be greater than the width of the end portion facing the collector 2810. The 2nd A curved portion 28222 can extend from the 2nd A extension 28221. The 2nd A curved portion 28222 can extend in the second direction. The 2nd A curved portion 28222 can be disposed between the first body 2811 and the second body 2821 with respect to the third direction. The 2nd A curved portion 28222 can be disposed closer to the second body 2821 than the first body 2811.

[0201] The 1st B leg 2813 can include a 1st B extension 28131 and a 1st B curved portion 28132. Also, the 2nd B leg 2823 can include a 2nd B extension 28231 and a 2nd B curved portion 28232. Here, since the 1st B extension 28131 and the 1st B curved portion 28132 respectively have the same shape as the 1st A extension 28121 and the 1st A curved portion 28122, detailed descriptions thereof will be omitted. Also, since the 2nd B extension 28231 and the 2nd B curved portion 28232 respectively have the same shape as the 2nd A extension 28221 and the 2nd A curved portion 28222, detailed descriptions thereof will be omitted.

[0202] The 1A curved portion 28122 and the 2A curved portion 28222 can overlap in the third direction. Also, the 1A curved portion 28122 and the 2A curved portion 28222 can be spaced apart from each other in the third direction. The spacing distance D24 between the 1A curved portion 28122 and the 2A curved portion 28222 can be less than the spacing distance between the first body 2811 and the second body 2821. Also, the 1B curved portion 28132 and the 2B curved portion 28232 can overlap in the third direction. The 1B curved portion 28132 and the 2B curved portion 28232 can be spaced apart from each other in the third direction. The spacing distance D25 between the 1B curved portion 28132 and the 2B curved portion 28232 can be equal to the spacing distance D24 between the 1A curved portion 28122 and the 2A curved portion 28222.

[0203] The end of the 1A curved portion 28122, the 1B curved portion 28132, the 1A curved portion 28122, and the 2A curved portion 28222 can be disposed at the same height H2. As used herein, the same height does not necessarily mean exactly the same height, but can allow for a difference within an error range. Also, the height H2 of the end of the 1A curved portion 28122, the end of the 1B curved portion 28132, the 1A curved portion 28122, and the 2A curved portion 28222 can be different from the height H1 of one surface of the first body 2811 or the second body 2821.

[0204] Figure 37 is a graph showing the amount of change in gauss measured by the first stator and the second stator of the sensing device according to one embodiment.

[0205] In the graph, the vertical axis represents the amount of change in gauss applied to the Hall sensor 2500 Figure 16 ) and the horizontal axis represents the moving distance of the first magnet and the second magnet. Here, the distance refers to the distance that the first magnet and the second magnet move in the first direction with respect to the initial position.

[0206] Here, the magnetic flux of the first stator 2310 collected by the first collector 2410 is denoted as the first magnetic flux T1, and the magnetic flux of the second stator 2320 collected by the second collector 2420 is denoted as the second magnetic flux T2.

[0207] Referring to Figure 37It can be seen that, in the sensing device, the magnetic flux density of the first magnetic flux T1 changes according to the displacement of the first magnet 2210, and the second magnetic flux T2 is inversely proportional to the change value of the first magnetic flux T1. At this time, the first magnetic flux T1 and the second magnetic flux T2 can be represented by a curve symmetrical with respect to the magnetic displacement 0. Therefore, it can be seen that the difference (T1-T2) between the first magnetic flux T1 and the second magnetic flux T2 linearly decreases or linearly increases according to the position of the magnet in the first direction.

[0208] It can be seen that, when an external magnetic field is introduced, both the first magnetic flux T1 and the second magnetic flux T2 are shifted, but the difference (T1-T2) between the first magnetic flux T1 and the second magnetic flux T2 is not affected. The sensing device according to the embodiment can maintain the linearity of the magnet flux even when an external magnetic field is applied, and by improving the linearity of the flux, the displacement of the magnet can be more accurately detected.

[0209] The sensing device according to the present application can improve the measurement accuracy by securing the linearity of the Gauss value.

[0210] Although the above-described embodiments have been described with reference to examples applied to a vehicle steering structure, the present application is not limited thereto. The present application relates to a Linear Variable Differential Transformer (LVDT) that can be used for various applications including construction, facility management, home appliances, hydraulic machinery, measurement systems, aviation machinery, medical devices, production plants, inspection and test systems, mechanical devices, etc.

Claims

1. A sensing device comprising: a magnet; a collector disposed corresponding to a path along which the magnet moves, wherein the collector includes a first leg, a second leg, and a third leg, the first leg is disposed at a periphery of an upper end of the magnet, the second leg is disposed at a periphery of a lower end of the magnet, one side of the third leg faces the first leg, and the other side of the third leg faces the second leg, and a position of the magnet is determined from a difference between a position of the magnet detected by using the first leg and the third leg and a position of the magnet detected by using the second leg and the third leg. 2.The sensing device according to claim 1, comprising: a first sensor disposed in the collector; and a second sensor disposed at an opposite side of the first sensor with respect to the magnet, wherein the first sensor is disposed between the first leg and the third leg, and the second sensor is disposed between the second leg and the third leg. 3.The sensing device according to claim 1, comprising: a first sensor disposed in the collector, wherein the magnet includes a first magnetic pole and a second magnetic pole, the first leg and the second leg are disposed to face the first magnetic pole, and the third leg is disposed to face the second magnetic pole. positions of the first leg and the second leg are out of a plane.

4. The sensing device of claim 1, wherein, 5.The sensing device according to claim 1, wherein a spacing between the first leg and the third leg includes an area that increases from one side to the other side, and a spacing between the second leg and the third leg includes an area that increases from the other side to the one side. 6.A sensing device comprising: a magnet; a stator disposed on a path along which the magnet moves; and a Hall sensor disposed to face the magnet, wherein the magnet moves in a first direction, the stator includes a first portion and a second portion facing the magnet, wherein an area of facing surfaces of the magnet and the first portion decreases in the first direction, and an area of facing surfaces of the magnet and the second portion increases in the first direction. a rate at which the area of facing surfaces of the magnet and the first portion decreases in the first direction is equal to a rate at which the area of facing surfaces of the magnet and the second portion increases in the first direction. the magnet moves in the first direction with respect to the stator.

7. The sensing device of claim 6, wherein, the magnet is disposed between the first portion and the second portion.

8. The sensing device of claim 6, wherein, a width of one end of the first portion is equal to a width of the other end of the second portion.

9. The sensing device of claim 6, wherein, ​ 10. The sensing device of claim 9, wherein, ​

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