Magnetic field detection device and magnetic field detection device array

Abstract

In the magnetic field detection device capable of detecting the magnetic field along three axial directions, the magnetic interference among the magnetic sensors is reduced. A magnetic field detection device (100) is provided with a support body (10), and magnetic sensors (S1-S3) respectively housed in cutouts (121-123) of the support body (10). The cutout (121) is provided in at least one of the surfaces (11, 14) of the support body (10), the cutout (122) is provided in at least one of the surfaces (12, 15) of the support body (10), and the cutout (123) is provided in at least one of the surfaces (13, 16) of the support body (10). The magnetic sensor (S1) takes the X direction as the magnetic sensing direction, the magnetic sensor (S2) takes the Y direction as the magnetic sensing direction, and the magnetic sensor (S3) takes the Z direction as the magnetic sensing direction.

Description

Technical Field

[0001] The present disclosure relates to a magnetic field detection device, in particular to a magnetic field detection device capable of detecting magnetic fields along three axes. In addition, the present disclosure relates to a magnetic field detection device array having a plurality of such magnetic field detection devices. Background Art

[0002] Patent Document 1 discloses a magnetic field detection device capable of detecting a magnetic field along three axial directions.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Utility Model Publication No. 58-047181 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, the magnetic field detection device disclosed in Patent Document 1 has a problem in that magnetic interference is likely to occur between a plurality of magnetic sensors.

[0008] In the present disclosure, a technology 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.

[0009] Technical solutions to solve problems

[0010] One aspect of the present disclosure provides a magnetic field detection device, which comprises: a supporting body having a first, second and third cutouts; and a first, second and third magnetic sensors, which are respectively accommodated in the first, second and third cutouts, the supporting body having: a first and a second surface, which extend along a first direction and a second direction orthogonal to the first direction, and whose positions in a third direction orthogonal to the first and second directions are different from each other; a third and a fourth surface, which extend along the first and the third directions, and whose positions in the second direction are different from each other; and a fifth and a sixth surface, which extend along the second and the third directions, and whose positions in the first direction are different from each other, the first cutout is arranged on at least one of the first and the fourth surfaces, the second cutout is arranged on at least one of the second and the fifth surfaces, and the third cutout is arranged on at least one of the third and the sixth surfaces, the first magnetic sensor takes the first direction as its magnetic sensitivity direction, the second magnetic sensor takes the second direction as its magnetic sensitivity direction, and the third magnetic sensor takes the third direction as its magnetic sensitivity direction.

[0011] Effects of the Invention

[0012] According to the present disclosure, there is provided a technology for reducing magnetic interference between magnetic sensors in a magnetic field detection device capable of detecting a magnetic field along three axial directions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 (a) and (b) are schematic perspective views showing the appearance of the magnetic field detection device 100 according to one embodiment of the technology disclosed herein, and show shapes viewed from different directions.

[0014] Figure 2 (a) and (b) are schematic perspective views for explaining the structure of the support body 10, and show shapes viewed from different directions.

[0015] Figure 3 It is a schematic perspective view for explaining the structure of the magnetic sensor S1, and shows a state in which a resin case constituting the frame of the magnetic sensor S1 is deleted.

[0016] Figure 4 It 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.

[0017] Figure 5 It is a schematic diagram for explaining the orientation of the magnetic field detection device 100A and the magnetic field detection device 100B.

[0018] Figure 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. Figure 6 (a) represents the first example, Figure 6 (b) represents the second example, Figure 6 (c) represents the third example. DETAILED DESCRIPTION

[0019] Hereinafter, embodiments of the technology disclosed herein will be described in detail with reference to the drawings.

[0020] Figure 1 (a) and (b) are schematic perspective views showing the appearance of the magnetic field detection device 100 according to one embodiment of the technology disclosed herein, and show shapes viewed from different directions.

[0021] like Figure 1 As shown in (a) and (b) of FIG. 1 , the magnetic field detection device 100 of the present embodiment includes a support body 10 made of a non-magnetic material such as resin, and three magnetic sensors S1 to S3 supported by the support body 10 .

[0022] Figure 2 (a) and (b) are schematic perspective views for explaining the structure of the support body 10, and show shapes viewed from different directions.

[0023] like Figure 2As shown in (a) and (b), the support body 10 has a structure in which cutouts 121 to 123 are provided in a part of a block having a substantially rectangular parallelepiped shape. The cutouts 121 to 123 can be formed by processing the rectangular parallelepiped block, or can be formed while manufacturing the support body 10 using a mold or the like. According to the latter method, the relative position accuracy of the cutouts 121 to 123 is improved.

[0024] The magnetic sensors S1 to S3 are respectively accommodated in the cutouts 121 to 123. More specifically, the support body 10 has surfaces 11 and 12 that constitute the XY plane and are located on opposite sides of each other in the Z direction, surfaces 13 and 14 that constitute the XZ plane and are located on opposite sides of each other in the Y direction, and surfaces 15 and 16 that constitute the YZ plane and are located on opposite sides of each other in the X direction. In addition, the support body 10 is provided with a through hole 17 that is provided along the Z direction from the surface 11 to the surface 12.

[0025] exist Figure 2 In (a) and (b), the imaginary sides when the support body 10 does not have the cutouts 121 to 123 are indicated by dotted lines. When the cutouts 121 to 123 or the through-holes 17 do not exist, the support body 10 may be a rectangular parallelepiped or a cube. Figure 2 In the examples shown in (a) and (b), when there are no cutouts 121 to 123 or through holes 17, the shape of the support body 10 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 size in the X direction and the size in the Y direction.

[0026] The surface 11 and the surfaces 13 to 16 are orthogonal to each other. Moreover, the end of the surface 11 on the +Y direction side and the end of the surface 14 on the +Z direction side constitute the side 101. The end of the surface 11 on the -Y direction side and the end of the surface 13 on the +Z direction side constitute the side 107. The end of the surface 11 on the +X direction side and the end of the surface 16 on the +Z direction side constitute the side 104. The end of the surface 11 on the -X direction side and the end of the surface 15 on the +Z direction side constitute the side 112. The sides 101 and 107 extend in the X direction, and the sides 104 and 112 extend in the Y direction.

[0027] The surface 12 and the surfaces 13 to 16 are orthogonal to each other. Moreover, the end of the surface 12 on the +Y direction side and the end of the surface 14 on the -Z direction side constitute the side 105. The end of the surface 12 on the -Y direction side and the end of the surface 13 on the -Z direction side constitute the side 106. The end of the surface 12 on the +X direction side and the end of the surface 16 on the -Z direction side constitute the side 108. The end of the surface 12 on the -X direction side and the end of the surface 15 on the -Z direction side constitute the side 102. The sides 105 and 106 extend in the X direction, and the sides 102 and 118 extend in the Y direction.

[0028] The surfaces 13 and 14 and the surfaces 15 and 16 are orthogonal to each other. Moreover, the end of the surface 13 on the +X direction side and the end of the surface 16 on the -Y direction side constitute the side 103. The end of the surface 13 on the -X direction side and the end of the surface 15 on the -Y direction side constitute the side 111. The end of the surface 14 on the +X direction side and the end of the surface 16 on the +Y direction side constitute the side 110. The end of the surface 14 on the -X direction side and the end of the surface 15 on the +Y direction side constitute the side 109. The sides 103, 109 to 111 all extend in the Z direction.

[0029] Moreover, eight vertices 131 to 138 are defined in the support body 10. Among them, three vertices 131 to 133 are removed by the cuts 121 to 123 respectively, so as to constitute imaginary vertices when the support body 10 is a rectangular parallelepiped (or a cube). First, vertex 131 is an imaginary vertex where the extension lines of the sides 101, 104, and 110 intersect. In other words, vertex 131 is composed of imaginary ends of faces 11, 14, and 16. Vertex 132 is an imaginary vertex where the extension lines of the sides 102, 105, and 109 intersect. In other words, vertex 132 is composed of imaginary ends of faces 12, 14, and 15. Vertex 133 is an imaginary vertex where the extension lines of the sides 103, 106, and 108 intersect. In other words, vertex 133 is composed of imaginary ends of faces 12, 13, and 16.

[0030] In this embodiment, no cutouts are provided at the other vertices 134 to 138. That is, the vertices 134 to 138 constitute actual vertices rather than imaginary vertices. Vertex 134 is constituted by the terminal portions of the sides 101, 109, and 112. Vertex 135 is constituted by the terminal portions of the sides 107, 111, and 112. Vertex 136 is constituted by the terminal portions of the sides 103, 104, and 107. Vertex 137 is constituted by the terminal portions of the sides 105, 108, and 110. Vertex 138 is constituted by the terminal portions of the sides 102, 106, and 111.

[0031] The cutout 121 is provided along the side 101 and along the X direction in such a manner as to cut off the vertex 131. Thus, a portion of the faces 11, 14, and 16 is removed by the cutout 121, and a portion of the sides 101, 104, and 110 is removed. The cutout 121 has an inner wall 141 constituting an XY face, an inner wall 142 constituting an XZ face, and an inner wall 143 constituting a YZ face. The +Z direction side of the inner wall 141 is open in space except for a protrusion 144 constituting a portion of the face 11. The +Y direction side of the inner wall 142 is open in space except for a protrusion 145 constituting a portion of the face 14. The +X direction side of the inner wall 143 is open in space.

[0032] The dimension of the cutout 121 in the X direction is designed to be approximately the same as, or slightly larger than, the dimension of the magnetic sensor S1 in the X direction. The distance between the inner wall 141 and the inner wall 144a of the protrusion 144 in the Z direction is designed to be approximately the same as, or slightly larger than, the dimension of the magnetic sensor S1 in the Z direction. The distance between the inner wall 142 and the inner wall 145a of the protrusion 145 in the Y direction is designed to be approximately the same as, or slightly larger than, the dimension of the magnetic sensor S1 in the Y direction. Thus, if 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, as shown in FIG. Figure 1 As shown in (b) of FIG. 1 , the stopper 201 is screwed onto the surface 16 so as to cover a part of the cutout 121 from the X direction. This prevents the magnetic sensor S1 from falling out of the cutout 121 .

[0033] The cutout 122 is provided along the side 102 and in the Y direction in such a manner as to cut off the vertex 132. Thus, a portion of the surfaces 12, 14, and 15 is removed by the cutout 122, and a portion of the sides 102, 105, and 109 is removed. The cutout 122 has an inner wall 151 constituting an XY surface, an inner wall 152 constituting a YZ surface, and an inner wall 153 constituting an XZ surface. The -Z direction side of the inner wall 151 is open in space except for a protrusion 154 constituting a portion of the surface 12. The -X direction side of the inner wall 152 is open in space except for a protrusion 155 constituting a portion of the surface 15. The +Y direction side of the inner wall 153 is open in space.

[0034] The dimension of the cutout 122 in the Y direction is designed to be approximately the same as, or slightly larger than, the dimension of the magnetic sensor S2 in the Y direction. The distance between the inner wall 151 and the inner wall 154a of the protrusion 154 in the Z direction is designed to be approximately the same as, or slightly larger than, the dimension of the magnetic sensor S2 in the Z direction. The distance between the inner wall 152 and the inner wall 155a of the protrusion 155 in the X direction is designed to be approximately the same as, or slightly larger than, the dimension of the magnetic sensor S2 in the X direction. Thus, if the magnetic sensor S2 is inserted into the cutout 122 from the Y direction side, the magnetic sensor S2 is positioned in the Z direction by the inner wall 151 and the inner wall 154a of the protrusion 154, and the magnetic sensor S2 is positioned in the X direction by the inner wall 152 and the inner wall 155a of the protrusion 155. After the magnetic sensor S2 is inserted into the cutout 122, as shown in FIG. Figure 1 As shown in (b) of FIG. 1 , the stopper 202 is screwed onto the surface 14 so as to cover a part of the cutout 122 from the Y direction. This prevents the magnetic sensor S2 from falling out of the cutout 122 .

[0035] The cutout 123 is provided along the side 103 and along the Z direction in such a manner as to cut off the vertex 133. Thus, a portion of the surfaces 12, 13, and 16 is removed by the cutout 123, and a portion of the sides 103, 106, and 108 is removed. The cutout 123 has an inner wall 161 constituting the XZ surface, an inner wall 162 constituting the YZ surface, and an inner wall 163 constituting the XY surface. The -Y direction side of the inner wall 161 is open in space except for a protrusion 164 constituting a portion of the surface 13. The +X direction side of the inner wall 162 is open in space except for a protrusion 165 constituting a portion of the surface 16. The -Z direction side of the inner wall 163 is open in space.

[0036] The dimension of the cutout 123 in the Z direction is designed to be approximately the same as, or slightly larger than, the dimension of the magnetic sensor S3 in the Z direction. The distance between the inner wall 161 and the inner wall 164a of the protrusion 164 in the Y direction is designed to be approximately the same as, or slightly larger than, the dimension of the magnetic sensor S3 in the Y direction. The distance between the inner wall 162 and the inner wall 165a of the protrusion 165 in the X direction is designed to be approximately the same as, or slightly larger than, the dimension of the magnetic sensor S3 in the X direction. Thus, if the magnetic sensor S3 is inserted into the cutout 123 from the Z direction side, the magnetic sensor S3 is positioned in the Y direction by the inner wall 161 and the inner wall 164a of the protrusion 164, and the magnetic sensor S3 is positioned in the X direction by the inner wall 162 and the inner wall 165a of the protrusion 165. After the magnetic sensor S3 is inserted into the cutout 123, as shown in FIG. Figure 1 As shown in (b) of FIG. 1 , the stopper 203 is screwed onto 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 .

[0037] Figure 3 It is a schematic perspective view for explaining the structure of the magnetic sensor S1, and shows a state in which a resin case constituting the frame of the magnetic sensor S1 is deleted.

[0038] like Figure 3 As shown, the magnetic sensor S1 includes a substrate 211 with the X direction as the long side direction, and a magnetic sensitive element 212 mounted near the front end of the substrate 211 in the +X direction. The magnetic sensitive direction of the magnetic sensitive element 212 is the X direction. Thus, the end surface 210 in the +X direction of the resin shell constituting the frame 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 surface 210 is detected by the magnetic sensor S1. The magnetic sensitive element 212 is connected to the connector 214 via a cable 213 fixed to the substrate 211.

[0039] The other magnetic sensors S2 and S3 also have the same structure. That is, in the magnetic sensor S2, a magnetic sensitive element 212 with the Y direction as the magnetic sensitive direction is provided in the frame, and the end surface of the resin shell constituting the frame in the +Y direction constitutes the sensor head. In the magnetic sensor S3, a magnetic sensitive element 212 with the Z direction as the magnetic sensitive direction is provided in the frame, and the end surface of the resin shell constituting the frame in the -Z direction constitutes the sensor head. The magnetic sensors S1 to S3 may also have the same structure as each other.

[0040] In this way, the magnetic field detection device 100 of this embodiment can detect magnetic fields along three axes (X direction, Y direction and Z direction) because the magnetic sensors S1 to S3 with different sensitivity axes are respectively accommodated in the cutouts 121 to 123 provided in the support body 10. In addition, because the cutouts 121 to 123 are respectively arranged along the sides 101 to 103 of the support body 10 that do not intersect each other (do not have a common vertex), physical interference of the magnetic sensors S1 to S3 can be prevented. In addition, because the distance between the sensor heads of the magnetic sensors S1 to S3 is also ensured, the magnetic interference between the magnetic sensors S1 to S3 can also be reduced.

[0041] In addition, in the magnetic field detection device 100 of the present embodiment, the magnetic sensor S1 and the magnetic sensor S2 do not overlap when viewed from the Z direction, and the magnetic sensor S2 and the magnetic sensor S3 do not overlap when viewed from the X direction, so the magnetic interference between the magnetic sensor S1 and the magnetic sensor S2 or the magnetic interference between the magnetic sensor S2 and the magnetic sensor S3 is suppressed. In addition, in the magnetic field detection device 100 of the present embodiment, the magnetic sensor S1 and the magnetic sensor S3 slightly overlap when viewed from the Y direction, but the magnetic sensor S1 and the magnetic sensor S3 can also be configured to not overlap when viewed from the Y direction by making the dimensions of the support body 10 in the X direction, the dimensions in the Y direction, and the dimensions in the Z direction substantially the same.

[0042] Furthermore, since the cutouts 121 to 123 each have an inner wall for positioning the magnetic sensors S1 to S3, the magnetic sensors S1 to S3 can be positioned with high precision along the inner wall of the cutouts 121 to 123. In addition, since each magnetic sensor S1 to S3 does not protrude from the surface 11 to 16 of the support body 10, miniaturization can be achieved, and a plurality of magnetic field detection devices 100 can be arranged close to each other in an array.

[0043] Figure 4 It 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.

[0044] Figure 4 The magnetic field detection device array shown has a structure in which eight magnetic field detection devices 100A to 100H are arranged in an array. Figure 4In the example shown, magnetic field detection devices 100A to 100C are arranged in the X direction, magnetic field detection devices 100D and 100E are arranged in the X direction, and magnetic field detection devices 100F to 100H are arranged in the X direction. The positions of magnetic field detection devices 100A to 100H in the Y direction are the same as each other. In addition, magnetic field detection device 100A and magnetic field detection device 100F are arranged in the Z direction, magnetic field detection device 100B and magnetic field detection device 100G are arranged in the Z direction, and magnetic field detection device 100C and magnetic field detection device 100H are arranged in the Z direction. These magnetic field detection devices 100A to 100H can be fixed to any position in the measurement space by, for example, passing an axis or the like through a through hole 17 provided in the support body 10.

[0045] In addition, the position of the magnetic field detection device 100D in the X direction is located 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 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 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 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.

[0046] In this way, if a plurality of magnetic field detection devices 100 are arranged in an array, it is possible to detect magnetic fields in a wider range of space. Figure 4 In the example shown, in two magnetic field detection devices adjacent to each other in the X direction, the orientations of the support bodies 10 differ by 180°. For example, the support body 10 of the magnetic field detection device 100B is fixed in the orientation in which the support body 10 of the magnetic field detection device 100A is rotated 180° around the Z axis. Figure 5 As shown, since 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 not consistent with each other but are offset in the Y direction, the magnetic field in the measurement space can be detected more efficiently. Figure 5 In the figure, the direction of the arrow indicates the magnetic sensitive direction, and the position of the arrow indicates the detection position (the position of the sensor head).

[0047] In addition, Figure 4In the example shown, the plurality of magnetic field detection devices are arranged separately from each other, but the support bodies 10 of adjacent magnetic field detection devices may be arranged to contact each other. When the plurality of magnetic field detection devices are arranged separately from each other, a spacer or the like may be arranged between the two in such a manner that the interval between the two is fixed.

[0048] Figure 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. Figure 6 (a) represents the first example, Figure 6 (b) represents the second example, Figure 6 (c) represents the third example.

[0049] Figure 6 The first example shown in (a) shows an example in which the cables 301 to 303 connected to the magnetic sensors S1 to S3 are separately led out from the magnetic field detection device 100. The cables 301 to 303 include not only signal cables for transmitting output signals output from the magnetic sensors S1 to S3, but also power cables and ground cables for supplying operating power to the magnetic sensors S1 to S3. Figure 6 In the first example shown in (a), the structure of the magnetic field detection device 100 is simple.

[0050] Figure 6 The second example shown in (b) shows an example in which a circuit substrate 311 is provided in the magnetic field detection device 100, and the magnetic sensors S1 to S3 are connected to the cable 312 via the circuit substrate 311. The cable 312 includes 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. Figure 6 In the second example shown in (b), the number of cables and connectors led out from the magnetic field detection device 100 to the outside can be reduced.

[0051] Figure 6 The third example shown in (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 performing AD conversion on 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 the signal processing is performed in the controller 322. The controller 322 is connected to a cable 323. The cable 323 includes 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 Figure 6In the third example shown in (c), since a digital signal is output from the magnetic field detection device 100, the processing of the magnetic field detection device 100 becomes easy.

[0052] As described above, the embodiments of the technology disclosed herein are described. However, the technology disclosed herein is not limited to the above embodiments, and various modifications can be made without departing from the gist of the technology. Of course, these modifications are also included in the scope of the technology disclosed herein.

[0053] For example, in the above-mentioned embodiment, the cutouts 121 to 123 of the support body 10 are arranged so as to cut the sides 101 to 103 of the support body 10, respectively. However, the cutouts 121 to 123 do not need to cut the sides 101 to 103 themselves. Therefore, the cutouts 121 to 123 may be provided along the sides 101 to 103 instead of cutting the sides 101 to 103 themselves. As an example, the cutout 121 may be provided along the side 101 on one side of the surface 11 or the surface 14, the cutout 122 may be provided along the side 102 on one side of the surface 12 or the surface 15, and the cutout 123 may be provided along the side 103 on one side of the surface 13 or the surface 16.

[0054] The technology disclosed herein includes the following configuration examples, but is not limited thereto.

[0055] One aspect of the present disclosure provides a magnetic field detection device, which comprises: a support body having a first, second and third cutouts; and a first, second and third magnetic sensors, which are respectively accommodated in the first, second and third cutouts, the support body having: a first and second surface extending along a first direction and a second direction orthogonal to the first direction, and positions in a third direction orthogonal to the first and second directions are different from each other; a third and fourth surface extending along the first and third directions, and positions in the second direction are different from each other; and a fifth and sixth surface extending along the second and third directions, and positions in the first direction are different from each other, 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, the third cutout is provided on at least one of the third and sixth surfaces, the first magnetic sensor has the first direction as a magnetic sensitive direction, the second magnetic sensor has the second direction as a magnetic sensitive direction, and the third magnetic sensor has the third direction as a magnetic sensitive direction. According to this, the magnetic field can be detected along three axial directions by the first to third magnetic sensors, and magnetic interference between the first to third magnetic sensors can be suppressed.

[0056] In the magnetic field detection device, the first magnetic sensor may not protrude from the first and fourth surfaces but may be accommodated in the first cutout, the second magnetic sensor may not protrude from the second and fifth surfaces but may be accommodated in the second cutout, and the third magnetic sensor may not protrude from the third and sixth surfaces but may be accommodated in the third cutout. Thus, the overall size can be miniaturized.

[0057] In the above-mentioned magnetic field detection device, the first cutout may be arranged along the first direction by cutting the first side formed by the end of the first surface and the end of the fourth surface, the second cutout may be arranged along the second direction by cutting the second side formed by the end of the second surface and the end of the fifth surface, and the third cutout may be arranged along the third direction by cutting the third side formed by the end of the third surface and the end of the sixth surface. Accordingly, since the first to third sides do not intersect with each other, physical interference between the first to third magnetic sensors does not occur.

[0058] In the magnetic field detection device, the first cutout may be provided in a manner to cut off a first vertex formed by the end of the first surface, the end of the fourth surface, and the end of the sixth surface, the second cutout may be provided in a manner to cut off a second vertex formed by the end of the second surface, the end of the fourth surface, and the end of the fifth surface, and the third cutout may be provided in a manner to cut off a third vertex formed by the end of the second surface, the end of the third surface, and the end of the sixth surface. Accordingly, the sensor heads of the first to third magnetic sensors can be arranged near the first to third vertices, respectively.

[0059] In the magnetic field detection device, the first magnetic sensor and the second magnetic sensor may not overlap when viewed from the third direction. This can further reduce magnetic interference between the first magnetic sensor and the second magnetic sensor.

[0060] In the magnetic field detection device, the second magnetic sensor and the third magnetic sensor may not overlap when viewed from the first direction. This can further reduce magnetic interference between the second magnetic sensor and the third magnetic sensor.

[0061] In the magnetic field detection device, the first magnetic sensor and the third magnetic sensor may not overlap when viewed from the second direction. This can further reduce magnetic interference between the first magnetic sensor and the third magnetic sensor.

[0062] One aspect of the present disclosure provides a magnetic field detection device array, which includes a plurality of the magnetic field detection devices described above, thereby being able to detect the magnetic field in a measurement space in a wider range.

[0063] In the magnetic field detection device array, the directions of the support bodies of two adjacent magnetic field detection devices among the plurality of magnetic field detection devices may be 180 degrees different from each other. This allows more efficient detection of the magnetic field in the measurement space.

[0064] Alternatively, 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 leads the first, second, and third cables to the outside. Accordingly, the number of cables and connectors that are led out of the magnetic field detection device to the outside can be reduced.

[0065] The magnetic field detection device may further include: an AD converter that performs AD conversion on analog signals output from the first, second, and third magnetic sensors; and a controller that processes digital signals output from the AD converter. Thus, the magnetic field detection device can output digital signals.

[0066] Description of Reference Numerals

[0067] 10 Support

[0068] 11 to 16 pages

[0069] 17Through holes

[0070] 100, 100A ~ 100H magnetic field detection device

[0071] 101~112 sides

[0072] 121~123 incision

[0073] 131~138 vertices

[0074] 141~143 inner wall

[0075] 144, 145 protrusion

[0076] 144a, 145a inner wall

[0077] 151~153 inner wall

[0078] 154, 155 protrusion

[0079] 154a, 155a inner wall

[0080] 161~163 inner wall

[0081] 164, 165 protrusion

[0082] 164a, 165a inner wall

[0083] 201~203 stopper

[0084] 210 End face

[0085] 211 substrate

[0086] 212 Magnetic sensor

[0087] 213 Cable

[0088] 214 Connectors

[0089] S1~S3 Magnetic sensor

[0090] 301~303, 312, 323 cables

[0091] 311 Circuit board

[0092] 321 AD Converter

[0093] 322 Controller

Claims

1. A magnetic field detection device, wherein: have: a support body having first, second and third cutouts; and first, second and third magnetic sensors are accommodated in the first, second and third cutouts, respectively, The support body comprises: first and second surfaces extending along 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 surfaces extending along the first and third directions, and having different positions in the second direction; and fifth and sixth surfaces extending along the second and third directions, and having 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, The third cutout is provided on at least one of the third and sixth surfaces, The first magnetic sensor takes the first direction as its magnetic sensitive direction, The second magnetic sensor takes the second direction as its magnetic sensitive direction, The third magnetic sensor uses the third direction as its magnetic sensitive direction.

2. The magnetic field detection device according to claim 1, wherein: The first magnetic sensor does not protrude from the first and fourth surfaces but is accommodated in the first cutout. The second magnetic sensor does not protrude from the second and fifth surfaces but is accommodated in the second cutout. The third magnetic sensor does not protrude from the third and sixth surfaces but is accommodated in the third notch.

3. The magnetic field detection device according to claim 1, wherein: The first cutout is provided along the first direction in such a manner as to cut a first side formed by an end of the first surface and an end of the fourth surface. The second cutout is provided along the second direction in such a manner as to cut out a second side formed 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 a third side formed by an end portion of the third surface and an end portion of the sixth surface.

4. The magnetic field detection device according to claim 3, wherein: The first cutout is provided in a manner of cutting off a first vertex formed by an end portion of the first surface, an end portion of the fourth surface, and an end portion of the sixth surface, The second cutout is provided in a manner of cutting off a second vertex formed by an end portion of the second surface, an end portion of the fourth surface, and an end portion of the fifth surface. The third cutout is provided so as to cut off a third vertex formed by an end portion of the second surface, an end portion of the third surface, and an end portion of the sixth surface.

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

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

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

8. The magnetic field detection device according to any one of claims 1 to 7, wherein: Also available: 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; as well as The fourth cable leads the first, second and third cables to the outside.

9. The magnetic field detection device according to any one of claims 1 to 7, wherein: Also available: An AD converter that performs AD conversion on analog signals output from the first, second, and third magnetic sensors; and A controller processes the digital signal output from the AD converter.

10. A magnetic field detection device array, wherein: A device comprising a plurality of magnetic field detection devices according to any one of claims 1 to 7.

11. The magnetic field detection device array according to claim 10, wherein: The directions of the support bodies of two adjacent magnetic field detection devices among the plurality of magnetic field detection devices differ from each other by 180°.

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