Magnetic field detection device and magnetic field detection device array

Abstract

To reduce magnetic interference between magnetic sensors in a magnetic field detection device that can detect a magnetic field in triaxial directions.SOLUTION: Disclosed herein is a magnetic field detection device 100 that includes a support 10 and magnetic sensors S1-S3 accommodated in cutouts 121-123 of the support 10. The cutout 121 is formed in at least one of surfaces 11, 14 of the support 10, the cutout 122 is formed in at least one of surfaces 12, 15 of the support 10, and the cutout 123 is formed in at least one of surfaces 13, 16 of the support 10. The magnetic sensor S1 has the X direction as the magnetic sensing direction, the magnetic sensor S2 has the Y direction as the magnetic sensing direction, and the magnetic sensor S3 has the Z direction as the magnetic sensing direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a magnetic field detection device, and more particularly to a magnetic field detection device capable of detecting a magnetic field in three axial directions, and also to a magnetic field detection device array including a plurality of such magnetic field detection devices. [Background technology]

[0002] Patent Document 1 discloses a magnetic field detection device capable of detecting a magnetic field in three axial directions. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 58-047181 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the magnetic field detection device disclosed in Patent Document 1 has a problem in that magnetic interference is likely to occur between the multiple magnetic sensors.

[0005] In this disclosure, a technique for reducing magnetic interference between magnetic sensors in a magnetic field detection device capable of detecting a magnetic field in three axial directions is described. [Means for solving the problem]

[0006] A magnetic field detection device according to one aspect of the present disclosure includes a support having first, second, and third cutouts, and first, second, and third magnetic sensors housed in the first, second, and third cutouts, respectively. The support has first and second faces extending in a first direction and a second direction perpendicular to the first direction and having different positions in a third direction perpendicular to the first and second directions, third and fourth faces extending in the first and third directions and having different positions in the second direction, and and fifth and sixth surfaces extending in a first direction and a third direction and having different positions in the first direction, a first notch is provided on at least one of the first and fourth surfaces, a second notch is provided on at least one of the second and fifth surfaces, and a third notch is provided on at least one of the third and sixth surfaces, the first magnetic sensor has a magnetic sensing direction in the first direction, the second magnetic sensor has a magnetic sensing direction in the second direction, and the third magnetic sensor has a magnetic sensing direction in the third direction. Effect of the Invention

[0007] According to the present disclosure, a technique is provided for reducing magnetic interference between magnetic sensors in a magnetic field detection device capable of detecting a magnetic field in three axial directions. [Brief description of the drawings]

[0008] [Figure 1] 1(a) and (b) are schematic perspective views showing the appearance of a magnetic field detection device 100 according to an embodiment of the technology disclosed herein, and show the shape as viewed from different directions. [Diagram 2] 2(a) and (b) are schematic perspective views for explaining the structure of the support 10, showing the shape as viewed from different directions. [Diagram 3] FIG. 3 is a schematic perspective view for explaining the structure of the magnetic sensor S1, showing a state in which the resin case constituting the housing of the magnetic sensor S1 has been removed. [Figure 4] FIG. 4 is a schematic perspective view of a magnetic field detection device array having a structure in which a plurality of magnetic field detection devices 100 are arranged in an array. [Diagram 5]FIG. 5 is a schematic diagram for explaining the orientations of the magnetic field detection device 100A and the magnetic field detection device 100B. [Figure 6] FIG. 6 is a schematic diagram for explaining a method of extracting output signals output from three magnetic sensors S1 to S3 included in the magnetic field detection device 100, where (a) shows a first example, (b) shows a second example, and (c) shows a third example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the technology according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0010] 1(a) and (b) are schematic perspective views showing the appearance of a magnetic field detection device 100 according to an embodiment of the technology disclosed herein, and show the shape as viewed from different directions.

[0011] As shown in FIGS. 1(a) and 1(b), a magnetic field detection device 100 according to this embodiment includes a support 10 made of a non-magnetic material such as resin, and three magnetic sensors S1 to S3 supported by the support 10.

[0012] 2(a) and (b) are schematic perspective views for explaining the structure of the support 10, showing the shape as viewed from different directions.

[0013] 2(a) and (b), the support 10 has a structure in which notches 121-123 are provided in parts of a block having a substantially rectangular parallelepiped shape. The notches 121-123 may be formed by processing the rectangular parallelepiped block, or may be formed simultaneously with the production of the support 10 using a mold or the like. The latter method improves the relative positional accuracy of the notches 121-123.

[0014] The magnetic sensors S1 to S3 are housed in the cutouts 121 to 123, respectively. More specifically, the support 10 has surfaces 11 and 12 which form an XY plane and are located opposite each other in the Z direction, surfaces 13 and 14 which form an XZ plane and are located opposite each other in the Y direction, and surfaces 15 and 16 which form a YZ plane and are located opposite each other in the X direction. The support 10 also has a through hole 17 which is provided in the Z direction from surface 11 to surface 12.

[0015] 2(a) and (b), imaginary edges in the case where the notches 121-123 are not present in the support 10 are shown by dashed lines. In the case where the notches 121-123 and the through-holes 17 are not present, the support 10 may be a rectangular parallelepiped or a cube. In the example shown in FIG. 2(a) and (b), the shape of the support 10 in the case where the notches 121-123 and the through-holes 17 are not present is a rectangular parallelepiped, the size in the X direction is the same as the size in the Y direction, and the size in the Z direction is slightly smaller than the sizes in the X direction and the Y direction.

[0016] Surface 11 and surfaces 13 to 16 are perpendicular to each other. The end of surface 11 on the +Y direction side and the end of surface 14 on the +Z direction side form side 101. The end of surface 11 on the -Y direction side and the end of surface 13 on the +Z direction side form side 107. The end of surface 11 on the +X direction side and the end of surface 16 on the +Z direction side form side 104. The end of surface 11 on the -X direction side and the end of surface 15 on the +Z direction side form side 112. Sides 101 and 107 extend in the X direction, and sides 104 and 112 extend in the Y direction.

[0017] Surface 12 and surfaces 13 to 16 are perpendicular to each other. The end of surface 12 on the +Y direction side and the end of surface 14 on the -Z direction side form side 105. The end of surface 12 on the -Y direction side and the end of surface 13 on the -Z direction side form side 106. The end of surface 12 on the +X direction side and the end of surface 16 on the -Z direction side form side 108. The end of surface 12 on the -X direction side and the end of surface 15 on the -Z direction side form side 102. Sides 105 and 106 extend in the X direction, and sides 102 and 118 extend in the Y direction.

[0018] Surfaces 13 and 14 are perpendicular to surfaces 15 and 16. The end of surface 13 on the +X direction side and the end of surface 16 on the -Y direction side form side 103. The end of surface 13 on the -X direction side and the end of surface 15 on the -Y direction side form side 111. The end of surface 14 on the +X direction side and the end of surface 16 on the +Y direction side form side 110. The end of surface 14 on the -X direction side and the end of surface 15 on the +Y direction side form side 109. All of sides 103, 109 to 111 extend in the Z direction.

[0019] Furthermore, eight vertices 131 to 138 are defined on the support 10. Of these, three vertices 131 to 133 are removed by the notches 121 to 123, respectively, and therefore constitute imaginary vertices when the support 10 is a rectangular parallelepiped (or cube). First, the vertex 131 is an imaginary vertex where the extensions of the sides 101, 104, and 110 intersect. In other words, the vertex 131 is constituted by imaginary ends of the faces 11, 14, and 16. The vertex 132 is an imaginary vertex where the extensions of the sides 102, 105, and 109 intersect. In other words, the vertex 132 is constituted by imaginary ends of the faces 12, 14, and 15. The vertex 133 is an imaginary vertex where the extensions of the sides 103, 106, and 108 intersect. In other words, the vertex 133 is constituted by imaginary ends of the faces 12, 13, and 16.

[0020] In this embodiment, the other vertices 134 to 138 are not provided with notches. That is, the vertices 134 to 138 constitute actual vertices, not virtual ones. The vertex 134 is constituted by the end portions of the sides 101, 109, and 112. The vertex 135 is constituted by the end portions of the sides 107, 111, and 112. The vertex 136 is constituted by the end portions of the sides 103, 104, and 107. The vertex 137 is constituted by the end portions of the sides 105, 108, and 110. The vertex 138 is constituted by the end portions of the sides 102, 106, and 111.

[0021] The cutout 121 is provided in the X direction along the side 101 so as to cut out the vertex 131. As a result, parts of the faces 11, 14, and 16 are removed by the cutout 121, and parts of the sides 101, 104, and 110 are also removed. The cutout 121 has an inner wall 141 that constitutes the XY plane, an inner wall 142 that constitutes the XZ plane, and an inner wall 143 that constitutes the YZ plane. The +Z direction side of the inner wall 141 is open to space except for a protrusion 144 that constitutes part of the face 11. The +Y direction side of the inner wall 142 is open to space except for a protrusion 145 that constitutes part of the face 14. The +X direction side of the inner wall 143 is open to space.

[0022] The size of the cutout 121 in the X direction is designed to be approximately the same as or slightly larger than the size of the magnetic sensor S1 in the X direction. The distance in the Z direction between the inner wall 141 and the inner wall 144a of the protrusion 144 is designed to be approximately the same as or slightly larger than the size of the magnetic sensor S1 in the Z direction. The distance in the Y direction between the inner wall 142 and the inner wall 145a of the protrusion 145 is designed to be approximately the same as or slightly larger than the size of the magnetic sensor S1 in the Y direction. As a result, when the magnetic sensor S1 is inserted into the cutout 121 from the X direction side, the magnetic sensor S1 is positioned in the Z direction by the inner wall 141 and the inner wall 144a of the protrusion 144, and the magnetic sensor S1 is positioned in the Y direction by the inner wall 142 and the inner wall 145a of the protrusion 145. After the magnetic sensor S1 is inserted into the cutout 121, a stopper 201 is screwed to the surface 16 so as to cover a part of the cutout 121 from the X direction, as shown in FIG. 1(b). This prevents the magnetic sensor S1 from falling out of the cutout 121.

[0023] The cutout 122 is provided in the Y direction along the side 102 so as to cut out the vertex 132. As a result, parts of the faces 12, 14, and 15 are removed by the cutout 122, and parts of the sides 102, 105, and 109 are also removed. The cutout 122 has an inner wall 151 that constitutes the XY plane, an inner wall 152 that constitutes the YZ plane, and an inner wall 153 that constitutes the XZ plane. The -Z direction side of the inner wall 151 is open to space except for a protrusion 154 that constitutes part of the face 12. The -X direction side of the inner wall 152 is open to space except for a protrusion 155 that constitutes part of the face 15. The +Y direction side of the inner wall 153 is open to space.

[0024] The size of cutout 122 in the Y direction is designed to be approximately the same as or slightly larger than the size of magnetic sensor S2 in the Y direction. The distance in the Z direction between inner wall 151 and inner wall 154a of protrusion 154 is designed to be approximately the same as or slightly larger than the size of magnetic sensor S2 in the Z direction. The distance in the X direction between inner wall 152 and inner wall 155a of protrusion 155 is designed to be approximately the same as or slightly larger than the size of magnetic sensor S2 in the X direction. Thereby, when magnetic sensor S2 is inserted into cutout 122 from the Y direction side, magnetic sensor S2 is positioned in the Z direction by inner wall 151 and inner wall 154a of protrusion 154, and magnetic sensor S2 is positioned in the X direction by inner wall 152 and inner wall 155a of protrusion 155. After the magnetic sensor S2 is inserted into the cutout 122, a stopper 202 is screwed to the surface 14 so as to cover a part of the cutout 122 from the Y direction, as shown in FIG. 1(b). This prevents the magnetic sensor S2 from falling out of the cutout 122.

[0025] The cutout 123 is provided in the Z direction along the side 103 so as to cut out the vertex 133. As a result, parts of the faces 12, 13, and 16 are removed by the cutout 123, and parts of the sides 103, 106, and 108 are also removed. The cutout 123 has an inner wall 161 that constitutes the XZ plane, an inner wall 162 that constitutes the YZ plane, and an inner wall 163 that constitutes the XY plane. The -Y direction side of the inner wall 161 is open to space except for a protrusion 164 that constitutes part of the face 13. The +X direction side of the inner wall 162 is open to space except for a protrusion 165 that constitutes part of the face 16. The -Z direction side of the inner wall 163 is open to space.

[0026] The size of cutout 123 in the Z direction is designed to be approximately the same as or slightly larger than the size of magnetic sensor S3 in the Z direction. The distance in the Y direction between inner wall 161 and inner wall 164a of protrusion 164 is designed to be approximately the same as or slightly larger than the size of magnetic sensor S3 in the Y direction. The distance in the X direction between inner wall 162 and inner wall 165a of protrusion 165 is designed to be approximately the same as or slightly larger than the size of magnetic sensor S3 in the X direction. As a result, when magnetic sensor S3 is inserted into cutout 123 from the Z direction side, magnetic sensor S3 is positioned in the Y direction by inner wall 161 and inner wall 164a of protrusion 164, and magnetic sensor S3 is positioned in the X direction by inner wall 162 and inner wall 165a of protrusion 165. After the magnetic sensor S3 is inserted into the cutout 123, as shown in FIG. 1B, a stopper 203 is screwed to the surface 12 so as to cover a part of the cutout 123 from the Z direction. This prevents the magnetic sensor S3 from falling out of the cutout 123.

[0027] FIG. 3 is a schematic perspective view for explaining the structure of the magnetic sensor S1, showing a state in which the resin case constituting the housing of the magnetic sensor S1 has been removed.

[0028] 3, the magnetic sensor S1 includes a substrate 211 whose longitudinal direction is the X direction, and a magnetic sensing element 212 mounted near the tip of the substrate 211 in the +X direction. The magnetic sensing direction of the magnetic sensing element 212 is the X direction. As a result, an end face 210 in the +X direction of a resin case constituting the housing of the magnetic sensor S1 constitutes the sensor head of the magnetic sensor S1, and the magnetic field in the X direction in the space near the end face 210 is detected by the magnetic sensor S1. The magnetic sensing element 212 is connected to a connector 214 via a cable 213 fixed to the substrate 211.

[0029] The other magnetic sensors S2 and S3 have the same configuration. That is, in the magnetic sensor S2, a magnetic sensing element 212 whose magnetic sensing direction is the Y direction is provided in the housing, and the end face in the +Y direction of the resin case that constitutes the housing constitutes the sensor head. In the magnetic sensor S3, a magnetic sensing element 212 whose magnetic sensing direction is the Z direction is provided in the housing, and the end face in the -Z direction of the resin case that constitutes the housing constitutes the sensor head. The magnetic sensors S1 to S3 may have the same structure.

[0030] In this manner, the magnetic field detection device 100 according to this embodiment is capable of detecting magnetic fields in three axial directions (X direction, Y direction, and Z direction) because the magnetic sensors S1 to S3, each having a different sensitivity axis direction, are housed in the cutouts 121 to 123 provided in the support 10. Moreover, the cutouts 121 to 123 are arranged along the sides 101 to 103 of the support 10 that do not intersect with each other (do not have a common apex), so that physical interference between the magnetic sensors S1 to S3 can be prevented. In addition, the distance between the sensor heads of the magnetic sensors S1 to S3 is ensured, so that magnetic interference between the magnetic sensors S1 to S3 can also be reduced.

[0031] In the magnetic field detection device 100 according to this embodiment, the magnetic sensors S1 and S2 do not overlap when viewed from the Z direction, and the magnetic sensors S2 and S3 do not overlap when viewed from the X direction, so that magnetic interference between the magnetic sensors S1 and S2 and between the magnetic sensors S2 and S3 is suppressed. Note that, in the magnetic field detection device 100 according to this embodiment, the magnetic sensors S1 and S3 slightly overlap when viewed from the Y direction, but the magnetic sensors S1 and S3 may be configured not to overlap when viewed from the Y direction by making the sizes of the support 10 in the X direction, the Y direction, and the Z direction substantially the same.

[0032] Furthermore, since the notches 121-123 have inner walls for positioning the magnetic sensors S1-S3, respectively, it is possible to position the magnetic sensors S1-S3 with high accuracy along the inner walls of the notches 121-123. Also, since the magnetic sensors S1-S3 do not protrude from the surfaces 11-16 of the support 10, it is possible to realize miniaturization and to arrange a plurality of magnetic field detection devices 100 in close proximity to each other in an array.

[0033] FIG. 4 is a schematic perspective view of a magnetic field detection device array having a structure in which a plurality of magnetic field detection devices 100 are arranged in an array.

[0034] The magnetic field detector array shown in FIG. 4 has a structure in which eight magnetic field detectors 100A to 100H are arranged in an array. In the example shown in FIG. 4, the magnetic field detectors 100A to 100C are arranged in the X direction, the magnetic field detectors 100D and 100E are arranged in the X direction, and the magnetic field detectors 100F to 100H are arranged in the X direction. The magnetic field detectors 100A to 100H are located at the same positions in the Y direction. The magnetic field detectors 100A and 100F are arranged in the Z direction, the magnetic field detectors 100B and 100G are arranged in the Z direction, and the magnetic field detectors 100C and 100H are arranged in the Z direction. These magnetic field detectors 100A to 100H can be fixed at any position in the measurement space, for example, by passing a shaft or the like through a through hole 17 provided in the support 10.

[0035] The position of the magnetic field detection device 100D in the X direction is located midway between the positions of the magnetic field detection devices 100A and 100F in the X direction and the positions of the magnetic field detection devices 100B and 100G in the X direction. The position of the magnetic field detection device 100D in the Z direction is located midway between the positions of the magnetic field detection devices 100A to 100C in the Z direction and the positions of the magnetic field detection devices 100F to 100H in the Z direction. The position of the magnetic field detection device 100E in the X direction is located midway between the positions of the magnetic field detection devices 100B and 100G in the X direction and the positions of the magnetic field detection devices 100C and 100H in the X direction. The position of the magnetic field detection device 100E in the Z direction is located midway between the positions of the magnetic field detection devices 100A to 100C in the Z direction and the positions of the magnetic field detection devices 100F to 100H in the Z direction.

[0036] In this way, by arranging a plurality of magnetic field detection devices 100 in an array, it becomes possible to detect a magnetic field in a wider range of space. Moreover, in the example shown in FIG. 4, the orientations of the supports 10 in two magnetic field detection devices adjacent in the X direction are different from each other by 180°. For example, the support 10 of the magnetic field detection device 100B is fixed in a direction obtained by rotating the support 10 of the magnetic field detection device 100A by 180° around the Z axis. As a result, as shown in the schematic diagram of FIG. 5, the sensitivity axis of the magnetic sensor S1 included in the magnetic field detection device 100A and the sensitivity axis of the magnetic sensor S1 included in the magnetic field detection device 100B are shifted in the Y direction without coinciding with each other, so that it becomes possible to detect the magnetic field in the measurement space more efficiently. In FIG. 5, the direction of the arrow indicates the magnetic sensing direction, and the position of the arrow indicates the detection position (position of the sensor head).

[0037] 4, the magnetic field detection devices are arranged at a distance from each other, but the supports 10 of adjacent magnetic field detection devices may be arranged so as to be in contact with each other. When the magnetic field detection devices are arranged at a distance from each other, a spacer or the like may be arranged between the magnetic field detection devices to fix the distance between them.

[0038] FIG. 6 is a schematic diagram for explaining a method of extracting output signals output from three magnetic sensors S1 to S3 included in the magnetic field detection device 100, where (a) shows a first example, (b) shows a second example, and (c) shows a third example.

[0039] The first example shown in Fig. 6(a) shows an example in which cables 301-303 connected to the magnetic sensors S1-S3, respectively, are drawn out separately from the magnetic field detection device 100. The cables 301-303 may include not only signal cables for transmitting output signals output from the magnetic sensors S1-S3, but also power cables for supplying operating power to the magnetic sensors S1-S3 and ground cables. According to the first example shown in Fig. 6(a), the configuration of the magnetic field detection device 100 becomes simple.

[0040] The second example shown in Fig. 6(b) shows an example in which a circuit board 311 is provided in the magnetic field detection device 100, and the magnetic sensors S1 to S3 are connected to a cable 312 via the circuit board 311. The cable 312 may include not only a signal cable for transmitting output signals output from the magnetic sensors S1 to S3, but also a power cable for supplying operating power to the magnetic sensors S1 to S3. According to the second example shown in Fig. 6(b), it is possible to reduce the number of cables and connectors drawn out from the magnetic field detection device 100 to the outside.

[0041] A third example shown in FIG. 6(c) shows an example in which an AD converter 321 and a controller 322 are provided in the magnetic field detection device 100, and a cable 323 is connected to the controller 322. The AD converter 321 generates a digital signal by AD converting the analog signal output from the magnetic sensors S1 to S3. The digital signal output from the AD converter 321 is supplied to the controller 322, and is processed in the controller 322. The cable 323 is connected to the controller 322. The cable 323 may include not only a signal cable for transmitting the output signal output from the magnetic sensors S1 to S3, but also a power cable for supplying operating power to the magnetic sensors S1 to S3. According to the third example shown in FIG. 6(c), since a digital signal is output from the magnetic field detection device 100, the magnetic field detection device 100 can be easily handled.

[0042] The above describes embodiments of the technology related to the present disclosure. However, the technology related to the present disclosure is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the technology, and it goes without saying that these modifications are also included within the scope of the technology related to the present disclosure.

[0043] For example, in the above embodiment, the notches 121 to 123 of the support 10 are arranged so as to cut out the sides 101 to 103 of the support 10, respectively, but it is not necessary for the notches 121 to 123 to cut out the sides 101 to 103 themselves. Therefore, the notches 121 to 123 may be provided along the sides 101 to 103 without cutting out the sides 101 to 103 themselves. As an example, the notch 121 may be provided in one of the faces 11 or 14 along the side 101, the notch 122 may be provided in one of the faces 12 or 15 along the side 102, and the notch 123 may be provided in one of the faces 13 or 16 along the side 103.

[0044] The technology according to the present disclosure includes the following configuration examples, but is not limited to these.

[0045] A magnetic field detection device according to one aspect of the present disclosure includes a support having first, second, and third cutouts, and first, second, and third magnetic sensors housed in the first, second, and third cutouts, respectively. The support has first and second faces extending in a first direction and a second direction perpendicular to the first direction and having different positions in a third direction perpendicular to the first and second directions, third and fourth faces extending in the first and third directions and having different positions in the second direction, and and a fifth and sixth surface extending in a third direction and positioned at different positions in the first direction, the first cutout is provided on at least one of the first and fourth surfaces, the second cutout is provided on at least one of the second and fifth surfaces, and the third cutout is provided on at least one of the third and sixth surfaces, and the first magnetic sensor has a magnetic sensing direction in the first direction, the second magnetic sensor has a magnetic sensing direction in the second direction, and the third magnetic sensor has a magnetic sensing direction in the third direction. This makes it possible to detect a magnetic field in three axial directions by the first to third magnetic sensors, and to suppress magnetic interference between the first to third magnetic sensors.

[0046] In the above magnetic field detection device, the first magnetic sensor may be housed in the first cutout without protruding from the first and fourth faces, the second magnetic sensor may be housed in the second cutout without protruding from the second and fifth faces, and the third magnetic sensor may be housed in the third cutout without protruding from the third and sixth faces, which makes it possible to reduce the overall size.

[0047] In the above magnetic field detection device, the first cutout may be provided along a first direction to cut out a first side defined by an end of the first surface and an end of the fourth surface, the second cutout may be provided along a second direction to cut out a second side defined by an end of the second surface and an end of the fifth surface, and the third cutout may be provided along a third direction to cut out a third side defined by an end of the third surface and an end of the sixth surface. In this way, the first to third sides do not intersect with each other, so that no physical interference occurs between the first to third magnetic sensors.

[0048] In the above magnetic field detection device, the first cutout may be provided to cut out a first vertex formed by an end of the first surface, an end of the fourth surface, and an end of the sixth surface, the second cutout may be provided to cut out a second vertex formed by an end of the second surface, an end of the fourth surface, and an end of the fifth surface, and the third cutout may be provided to cut out a third vertex formed by an end of the second surface, an end of the third surface, and an end of the sixth surface. This allows the sensor heads of the first to third magnetic sensors to be disposed near the first to third vertices, respectively.

[0049] In the above magnetic field detection device, the first magnetic sensor and the second magnetic sensor do not have to overlap when viewed from the third direction, which makes it possible to further reduce magnetic interference between the first magnetic sensor and the second magnetic sensor.

[0050] In the above magnetic field detection device, the second magnetic sensor and the third magnetic sensor do not have to overlap when viewed from the first direction, which makes it possible to further reduce magnetic interference between the second magnetic sensor and the third magnetic sensor.

[0051] In the above magnetic field detection device, the first magnetic sensor and the third magnetic sensor do not have to overlap when viewed from the second direction, which makes it possible to further reduce magnetic interference between the first magnetic sensor and the third magnetic sensor.

[0052] A magnetic field detection device array according to one aspect of the present disclosure includes a plurality of the magnetic field detection devices described above, which makes it possible to detect a magnetic field in a wider range within a measurement space.

[0053] In the magnetic field detector array, the orientation of the supports of two adjacent magnetic field detectors among the plurality of magnetic field detectors may be different by 180° from each other, which makes it possible to detect the magnetic field in the measurement space more efficiently.

[0054] The magnetic field detection device may further include a first cable connected to the first magnetic sensor, a second cable connected to the second magnetic sensor, a third cable connected to the third magnetic sensor, and a fourth cable that collectively leads the first, second, and third cables to the outside. This makes it possible to reduce the number of cables and connectors that are led out from the magnetic field detection device to the outside.

[0055] The magnetic field detection device may further include an AD converter that converts the analog signals output from the first, second, and third magnetic sensors into analog signals, and a controller that processes the digital signals output from the AD converter, thereby enabling the magnetic field detection device to output digital signals. [Explanation of symbols]

[0056] 10 Support 11~16 sides 17 Through hole 100,100A~100H Magnetic field detector 101~112 sides 121~123 Cutout 131~138 Vertex 141~143 Inner wall 144,145 Protrusion 144a,145a Inner wall 151~153 Inner wall 154,155 Protrusion 154a,155a inner wall 161~163 Inner wall 164,165 Protrusion 164a,165a inner wall 201~203 Stopper 210 End face 211 Substrate 212 Magnetic sensing element 213 Cable 214 Connector S1~S3 Magnetic sensors 301~303,312,323 Cable 311 Circuit Board 321 A / D converter 322 Controller

Claims

1. a support having first, second and third notches; first, second and third magnetic sensors housed in the first, second and third cutouts, respectively; Equipped with the support body has first and second surfaces extending in a first direction and a second direction perpendicular to the first direction and positioned differently from each other in a third direction perpendicular to the first and second directions, third and fourth surfaces extending in the first and third directions and positioned differently from each other in the second direction, and fifth and sixth surfaces extending in the second and third directions and positioned differently from each other in the first direction; the first cutout is provided in at least one of the first and fourth surfaces, the second notch is provided in at least one of the second and fifth surfaces, the third cutout is provided in at least one of the third and sixth surfaces, the first magnetic sensor has a magnetic sensing direction in the first direction; the second magnetic sensor has a magnetic sensing direction in the second direction; the third magnetic sensor has a magnetic sensing direction in the third direction; Magnetic field detection device.

2. the first magnetic sensor is accommodated in the first cutout without protruding from the first and fourth surfaces; the second magnetic sensor is accommodated in the second cutout without protruding from the second and fifth surfaces; the third magnetic sensor is accommodated in the third cutout without protruding from the third and sixth surfaces; The magnetic field detection device according to claim 1 .

3. the first cutout is provided along the first direction so as to cut out a first side defined by an end of the first surface and an end of the fourth surface; the second cutout is provided along the second direction so as to cut out a second side defined by an end of the second surface and an end of the fifth surface; the third cutout is provided along the third direction so as to cut out a third side defined by an end of the third surface and an end of the sixth surface; The magnetic field detection device according to claim 1 .

4. the first cutout is provided so as to cut out a first apex defined by an end of the first surface, an end of the fourth surface, and an end of the sixth surface; the second cutout is provided so as to cut out a second apex defined by an end of the second surface, an end of the fourth surface, and an end of the fifth surface; the third cutout is provided so as to cut out a third apex defined by an end of the second surface, an end of the third surface, and an end of the sixth surface; The magnetic field detection device according to claim 3.

5. When viewed from the third direction, the first magnetic sensor and the second magnetic sensor do not overlap. The magnetic field detection device according to claim 1 .

6. When viewed from the first direction, the second magnetic sensor and the third magnetic sensor do not overlap. The magnetic field detection device according to claim 5.

7. When viewed from the second direction, the first magnetic sensor and the third magnetic sensor do not overlap. The magnetic field detection device according to claim 6.

8. A magnetic field detection device array comprising a plurality of magnetic field detection devices according to any one of claims 1 to 7.

9. The magnetic field detection device array according to claim 8 , wherein among the plurality of magnetic field detection devices, two adjacent magnetic field detection devices have supports whose orientations are different by 180° from each other.

10. a first cable connected to the first magnetic sensor; a second cable connected to the second magnetic sensor; a third cable connected to the third magnetic sensor; a fourth cable that collectively draws the first, second, and third cables to the outside; Further comprising: A magnetic field detection device according to any one of claims 1 to 7.

11. an AD converter that converts analog signals output from the first, second, and third magnetic sensors into digital signals; A controller for processing a digital signal output from the AD converter; Further comprising: A magnetic field detection device according to any one of claims 1 to 7.

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