阅读说明：本技术 磁场测量设备 (Magnetic field measuring device ) 是由 高宏伟 王建平 王长明 于 2021-10-09 设计创作，主要内容包括：本发明公开一种磁场测量设备,包括终端设备(01)、控制器(02)、屏蔽箱(03)以及设置在该屏蔽箱中的驱动电机(04)、导轨(05)、磁传感器(06)、磁体支撑柱(07)和测距仪(08)；该导轨(05)包括X轴导轨(0501)、Y轴导轨(0502)和Z轴导轨(0503),该导轨用于使该磁传感器(06)在X轴、Y轴和Z轴移动；该磁传感器(06)和该测距仪(08)设置在该X轴导轨(0501)上；该磁体支撑柱(07)用于固定待测磁体(09),该磁体支撑柱(07)安装在与该磁传感器(06)平行且对中的位置；该驱动电机(04)外部设置屏蔽罩(10)。通过该磁场测量设备排除了磁场测量过程中的干扰,实现待测磁体与磁传感器对中,提高了待测磁体磁场磁感应强度的测量精度。(The invention discloses a magnetic field measuring device, which comprises a terminal device (01), a controller (02), a shielding box (03), a driving motor (04), a guide rail (05), a magnetic sensor (06), a magnet supporting column (07) and a distance meter (08), wherein the driving motor, the guide rail (05), the magnetic sensor (06), the magnet supporting column (07) and the distance meter are arranged in the shielding box; the guide rail (05) comprises an X-axis guide rail (0501), a Y-axis guide rail (0502), and a Z-axis guide rail (0503) for moving the magnetic sensor (06) in the X-axis, the Y-axis, and the Z-axis; the magnetic sensor (06) and the distance meter (08) are arranged on the X-axis guide rail (0501); the magnet supporting column (07) is used for fixing a magnet (09) to be measured, and the magnet supporting column (07) is arranged at a position parallel to and centered with the magnetic sensor (06); a shielding case (10) is arranged outside the driving motor (04). Interference in the magnetic field measurement process is eliminated through the magnetic field measurement equipment, the centering of the magnet to be measured and the magnetic sensor is realized, and the measurement precision of the magnetic field magnetic induction intensity of the magnet to be measured is improved.)

1. The magnetic field measuring device is characterized by comprising a terminal device (01), a controller (02), a shielding box (03), a driving motor (04), a guide rail (05), a magnetic sensor (06), a magnet supporting column (07) and a distance meter (08) which are arranged in the shielding box, wherein the terminal device (01) is in communication connection with the controller (02), and the controller (02) is in communication connection with the driving motor (04);

the guide rail (05) comprises an X-axis guide rail (0501), a Y-axis guide rail (0502) and a Z-axis guide rail (0503), and the guide rail (05) is used for enabling the magnetic sensor (06) to move on the X-axis, the Y-axis and the Z-axis respectively;

the magnetic sensor (06) and the distance meter (08) are arranged on the X-axis guide rail (0501);

the magnet supporting column (07) is used for fixing a magnet (09) to be measured, and the magnet supporting column (07) is arranged at a position parallel to and centered with the magnetic sensor (06);

and a shielding cover (10) is arranged outside the driving motor (04).

2. Magnetic field measurement device according to claim 1, characterized in that the shielding cage (03) comprises an upper shield plate (0301), a lower shield plate (0302), a left shield plate (0303), a right shield plate (0304), a front switchable shield plate (0305) and a rear shield plate (0306).

3. Magnetic field measuring device according to claim 1, characterized in that the shielding cage (03) and the shielding cage (10) are each made of a magnetic isolating material with a relative vacuum permeability > 200.

4. Magnetic field measurement device according to claim 1, characterized in that the drive motors (04) comprise one first drive motor (0401), two second drive motors (0402) and two third drive motors (0403);

-one said first drive motor (0401) for driving said magnetic sensor (06) along said X-axis rail (0501);

two of the second drive motors (0402) are used for driving the magnetic sensor (06) to move along the Y-axis guide rail (0502);

two of the third drive motors (0403) are used to drive the magnetic sensor (06) to move along the Z-axis rail (0503).

5. The magnetic field measurement device according to claim 2, characterized in that said lower shield plate (0302) is provided with a first boss (0307) on which said Y-axis guide rail (0502) is fixed (0307);

the magnet support column (07) is fixed on the first boss (0307).

6. The magnetic field measurement device according to claim 5, characterized in that a clearance slot (0308) is provided on said first boss (0307), said clearance slot (0308) penetrating said lower shield plate (0302), said clearance slot (0308) being provided with a first step (0309);

the bottom of the magnet support column (07) is provided with a first groove (0701) matched with the first step (0309).

7. Magnetic field measurement device according to claim 6, characterized in that the magnet support post (07) is clearance fitted with the first boss (0307) and the lower shield plate (0302), the fitting clearance d1 e [0.02,0.12] mm.

8. The magnetic field measurement device according to claim 1, characterized in that the magnet support column (07) is provided with a magnet fixing block (0702), the magnet support column (07) and the magnet fixing block (0702) are mounted in a clearance fit manner and fixed by screws;

the magnet fixing block (0702) and the magnet to be detected (09) are installed in a clearance fit mode and fixed through screws, and the fit clearance d2 is smaller than or equal to 0.1 mm.

9. The magnetic field measuring device according to claim 8, characterized in that the magnet (09) to be measured is cylindrical, square, semicircular, spherical, etc., and the recess of the magnet fixing block (0702) for accommodating the magnet (09) to be measured is in the shape of a double-segment circular arc and a double-sided slot.

10. The magnetic field measurement device according to claim 1, characterized in that the magnetic sensor (06) is integrated on a PCB circuit board (11), the PCB circuit board (11) is fixed on a cylinder (1201) of a fixing block (12) by a thermosetting positioning pin, the cylinder (1201) is integrally formed with the fixing block (12), the PCB circuit board (11) is provided with a fitting circular arc (1101) and a trimming groove (1102) which are fitted with the cylinder (1201), and the center of the magnetic sensor (06) coincides with the center of the fitting circular arc (1101);

the distance measuring instrument (08) is installed on the fixing block (12), and the installation surface of the distance measuring instrument (08) is perpendicular to the cylinder (1201).

11. Magnetic field measuring device according to claim 1, characterized in that a roller support (13) is mounted to the bottom of the shielding cage, on which roller support a moving roller (14) is mounted.

12. Magnetic field measuring device according to claim 1, characterized in that the mass m of the magnet under test (09) is ≦ 10 g.

13. The magnetic field measuring device according to claim 1, characterized in that the magnetic sensors (06) have a range of movement distances of 0mm to 2000mm, respectively.

Technical Field

The invention relates to the field of machinery, in particular to magnetic field measuring equipment.

Background

The small permanent magnet is controlled by the large permanent magnet outside the body to realize active control of the capsule endoscope inside the body, so that the control efficiency of the capsule endoscope and the effectiveness of an inspection result are improved.

The magnetic induction intensity of the magnetic field of the permanent magnet is sharply reduced along with the increase of the distance, when the small permanent magnet needs to measure the magnetic field distribution at a longer distance, the magnetic field of the small permanent magnet per se has a uT weak magnetic field at a long distance, the surrounding geomagnetism, the moving motor, the electromagnetic field generated by an electric appliance or other magnetic field interference can cause the magnetic induction intensity measurement result of the magnetic field of the small permanent magnet to have larger deviation, and the measurement noise exceeds the magnetic induction intensity value of the magnetic field to be measured per se.

The existing magnetic field measuring equipment does not consider the coincidence of the coordinate system of the permanent magnet to be measured and the coordinate system of the magnetic sensor, so that the centering can be realized only by debugging the coordinate of the permanent magnet for multiple times during measurement, or the centering fails at last, so that the deviation of the magnetic field measurement result is large, and the misjudgment on the magnetic field distribution measurement result of the permanent magnet is caused.

Disclosure of Invention

In order to overcome at least one technical problem in the prior art, the invention provides a magnetic field measurement device, which aims to eliminate interference in a magnetic field measurement process, realize the alignment of coordinates of a magnet to be measured, such as a permanent magnet, and coordinates of a magnetic sensor, and improve the measurement accuracy of magnetic induction intensity of the magnetic field of the permanent magnet.

The embodiment of the invention provides magnetic field measuring equipment which is characterized by comprising terminal equipment 01, a controller 02, a shielding box 03, a driving motor 04 arranged in the shielding box, a guide rail 05, a magnetic sensor 06, a magnet supporting column 07 and a distance meter 08, wherein the terminal equipment 01 is in communication connection with the controller 02, and the controller 02 is in communication connection with the driving motor 04;

the guide rails 05 include an X-axis guide rail 0501, a Y-axis guide rail 0502, and a Z-axis guide rail 0503, and the guide rails 05 are used to move the magnetic sensor 06 in the X-axis, the Y-axis, and the Z-axis, respectively;

the magnetic sensor 06 and the distance meter 08 are disposed on the X-axis guide rail 0501;

the magnet support column 07 is used for fixing a magnet 09 to be measured, and the magnet support column 07 is installed at a position parallel to and centered with the magnetic sensor 06;

a shielding case 10 is provided outside the driving motor 04.

In some embodiments, the shielding cage 03 comprises an upper shield plate 0301, a lower shield plate 0302, a left shield plate 0303, a right shield plate 0304, a front switchable shield plate 0305 and a rear shield plate 0306.

In some embodiments, the shielding box 03 and the shielding case 10 are made of magnetic shielding materials with relative vacuum permeability of more than 200.

In some embodiments, the drive motors 04 include one first drive motor 0401, two second drive motors 0402, and two third drive motors 0403;

one of the first drive motors 0401 is used to drive the magnetic sensor 06 to move along the X-axis guide rail 0501;

two of the second driving motors 0402 are used for driving the magnetic sensor 06 to move along the Y-axis guide rail 0502;

two of the third driving motors 0403 are used to drive the magnetic sensor 06 to move along the Z-axis guide rail 0503.

In some embodiments, a first boss 0307 is disposed on the lower shield plate 0302, and the Y-axis rail 0502 is fixed on the first boss 0307; the magnet support column 07 is fixed to the first boss 0307.

In some embodiments, a clearance groove 0308 is disposed on the first boss 0307, the clearance groove 0308 penetrates through the lower shield plate 0302, and the clearance groove 0308 is provided with a first step 0309;

the bottom of the magnet support column 07 is provided with a first groove 0701 matched with the first step 0309.

In some embodiments, said magnet support post 07 is clearance fitted with said first boss 0307 and said lower shield plate 0302 with a fitting clearance d1 e [0.02,0.12] mm.

In some embodiments, the magnet support column 07 is provided with a magnet fixing block 0702, and the magnet support column 07 and the magnet fixing block 0702 are installed in a clearance fit manner and fixed through screws;

the magnet fixing block 0702 and the magnet 09 to be detected are installed in a clearance fit mode and fixed through screws, and the fit clearance d2 is smaller than or equal to 0.1 mm.

In some embodiments, the shape of the magnet 09 to be tested is cylindrical, square, semicircular, spherical, or the like, and the groove of the magnet fixing block 0702 for accommodating the magnet 09 to be tested is in the shape of a double-section circular arc and a double-side cutting groove.

In some embodiments, the magnetic sensor 06 is integrated on a PCB circuit board 11, the PCB circuit board 11 is fixed on a cylinder 1201 of a fixed block 12 by a thermosetting positioning pin, the cylinder 1201 is integrally formed with the fixed block 12, the PCB circuit board 11 is provided with a matching arc 1101 matched with the cylinder 1201 and a trimming slot 1102, and a center of the magnetic sensor 06 coincides with a center of the matching arc 1101;

the distance measuring instrument 08 is installed on the fixing block 12, and the installation surface of the distance measuring instrument 08 is perpendicular to the cylinder 1201.

In some embodiments, the bottom of the shielding cage is mounted with a roller bracket 13 on which a moving roller 14 is mounted.

In some embodiments, the mass m of the magnet 09 under test is ≦ 10 g.

In some embodiments, the magnetic sensors 06 have a range of movement distances of 0mm to 2000mm, respectively.

The magnetic field measuring equipment provided by the embodiment of the invention comprises a terminal device 01, a controller 02, a shielding box 03, a driving motor 04, a guide rail 05, a magnetic sensor 06, a magnet supporting column 07 and a distance meter 08, wherein the driving motor 04, the guide rail 05, the magnetic sensor 06, the magnet supporting column 07 and the distance meter 08 are arranged in the shielding box, the terminal device 01 is in communication connection with the controller 02, and the controller 02 is in communication connection with the driving motor 04; the guide rails 05 include an X-axis guide rail 0501, a Y-axis guide rail 0502, and a Z-axis guide rail 0503, and the guide rails 05 are used to move the magnetic sensor 06 in the X-axis, the Y-axis, and the Z-axis, respectively; the magnetic sensor 06 and the distance meter 08 are disposed on the X-axis guide rail 0501; the magnet support column 07 is used for fixing a magnet 09 to be measured, and the magnet support column 07 is installed at a position parallel to and centered with the magnetic sensor 06; the shielding case 10 is arranged outside the driving motor 04, so that interference of an external magnetic field, electric appliances and the like in the magnetic field measurement process is eliminated, the coordinate of the permanent magnet is centered with the coordinate of the magnetic sensor, and the measurement precision of the magnetic induction intensity of the magnetic field of the permanent magnet is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention.

In the drawings:

fig. 1 is a perspective view of a magnetic field measuring apparatus according to an embodiment of the present invention;

FIG. 2 is a partial perspective view of a magnetic field measuring device provided in accordance with an embodiment of the present invention;

FIG. 3 is another partial perspective view of a magnetic field measuring device provided in accordance with an embodiment of the present invention;

fig. 4 is a sectional view of a driving motor of a magnetic field measuring apparatus according to an embodiment of the present invention;

fig. 5 is a perspective view of a shielding box of a magnetic field measuring apparatus according to an embodiment of the present invention;

FIG. 6a is another partial perspective view of a magnetic field measuring device provided in accordance with an embodiment of the present invention;

fig. 6b is a perspective view of a lower shielding plate of a magnetic field measuring apparatus according to an embodiment of the present invention;

fig. 7 is a perspective view of another lower shield plate of a magnetic field measuring apparatus according to an embodiment of the present invention;

FIG. 8 is a top view of a partial structure of a magnetic field measurement device according to an embodiment of the present invention;

FIG. 9 is a perspective view of a magnet support post of a magnetic field measurement device according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view of a magnet support post of a magnetic field measurement device provided in accordance with an embodiment of the present invention;

fig. 11 is a perspective view of a partial structure of a magnetic field measuring apparatus according to an embodiment of the present invention;

FIG. 12 is a sectional view showing another partial structure of a magnetic field measuring apparatus according to an embodiment of the present invention;

fig. 13 is a perspective view of another magnetic field measuring apparatus according to an embodiment of the present invention.

Description of reference numerals:

a terminal device 01;

a controller 02;

the shielding box 03, the upper shielding plate 0301, the lower shielding plate 0302, the left shielding plate 0303, the right shielding plate 0304, the switchable shielding plate 0305 at the front side, the rear shielding plate 0306, the first boss 0307, the clearance groove 0308, the first step 0309 and the screw installation stepped hole 030201;

a drive motor 04, a first drive motor 0401, a second drive motor 0402, a third drive motor 0403, a guide rail 05, an X-axis guide rail 0501, a Y-axis guide rail 0502, a Z-axis guide rail 0503;

the magnetic sensor 06;

the magnetic body fixing block 0703 comprises a magnet supporting column 07, a first groove 0701, a magnet fixing block 0702, a threaded hole 0704 and a first grooved surface 0704;

a distance meter 08;

a magnet 09 to be measured;

a shield case 10;

the PCB comprises a PCB 11, a matching arc 1101, a trimming groove 1102, a first positioning hole 1103, a fixed block 12, a cylinder 1201, a routing groove 1202 and a second positioning hole 1203;

a roller bracket 13;

a movable roller 14;

an illumination lamp 15;

a camera 16;

alignment pins 17, optical axis cylinder 1701, stepped cylinder 1702.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, 2 and 3, the embodiment of the invention provides a magnetic field measuring device for measuring the magnetic induction intensity of a small permanent magnet applied to a capsule endoscope, and provides a basis for the size, mass selection and design of the small permanent magnet. The magnetic field measuring device comprises a terminal device 01, a controller 02, a shielding box 03, a driving motor 04 arranged in the shielding box, a guide rail 05, a magnetic sensor 06, a magnet supporting column 07 and a distance meter 08, wherein the terminal device 01 is in communication connection with the controller 02, and the controller 02 is in communication connection with the driving motor 04; the guide rails 05 include an X-axis guide rail 0501, a Y-axis guide rail 0502, and a Z-axis guide rail 0503, and the guide rails 05 are used to move the magnetic sensor 06 in the X-axis, the Y-axis, and the Z-axis, respectively; the magnetic sensor 06 and the distance meter 08 are disposed on the X-axis guide rail 0501; the magnet support column 07 is used for fixing a magnet 09 to be measured, and the magnet support column 07 is installed at a position parallel to and centered with the magnetic sensor 06; a shielding case 10 is provided outside the driving motor 04.

Specifically, the terminal device 01 may be a computer, a mobile phone, or the like, and is not limited herein, the terminal device 01 is configured to send a control instruction to the controller 02, and the controller 02 controls the driving motor 04 to drive the guide rail 05 according to the control instruction, so as to realize the movement of the magnetic sensor 06 in the X-axis direction, the Y-axis direction, and the Z-axis direction. The driving motor 04, the guide rail 05, the magnetic sensor 06, the magnet support column 07 and the range finder 08 are all installed in the shielding box 03, the shielding box forms a closed space, shielding of an external magnetic field is achieved, interference of the external magnetic field on measurement of the magnetic induction intensity of the magnet 09 to be measured is avoided, and the external magnetic field comprises the geomagnetic field, other permanent magnet magnetic fields, and electromagnetic fields generated by electric appliances such as a terminal device and a controller. The mass m of the magnet 09 to be measured is less than or equal to 10g, for example, the mass m of the magnet 09 to be measured can be 10g, or 5g, or 0.7g, or 0.65g, or 0.3 g.

The range of the motion distance of the magnetic sensor 06 is 0mm to 2000mm, and it can be understood that the range is 300mm, 700mm, 1000mm, 1500mm or 2000 mm.

The rangefinder 08 may be a laser rangefinder. The guide rails 05 include an X-axis guide rail 0501, a Y-axis guide rail 0502, and a Z-axis guide rail 0503; one X-axis guide rail 0501, two Y-axis guide rails 0502, and two Z-axis guide rails 0503; one end of the X-axis guide rail 0501 is connected to one of the Z-axis guide rails 0503, and the other end of the X-axis guide rail 0501 is connected to the other Z-axis guide rail 0503; one of the Z-axis guide rails 0503 is connected to one of the Y-axis guide rails 0502, and the other Z-axis guide rail 0503 is connected to the other Y-axis guide rail 0502.

The driving motors 04 comprise a first driving motor 0401, two second driving motors 0402 and two third driving motors 0403; one of the first drive motors 0401 is used to drive the magnetic sensor 06 to move along the X-axis guide rail 0501; two of the second driving motors 0402 are used for driving the magnetic sensor 06 to move along the Y-axis guide rail 0502; two of the third driving motors 0403 are used to drive the magnetic sensor 06 to move along the Z-axis guide rail 0503. As shown in fig. 4, a shielding case 10 is disposed outside each driving motor, and the shielding case 10 is used for shielding an electromagnetic field generated by the driving motor and a leakage magnetic field, so as to avoid interference with measurement of the magnetic induction of the magnet 09 to be measured. The magnetic sensor 06 and the range finder 08 are arranged on an X-axis guide rail 0501, and the magnet support column 07 is installed at a position parallel to and centered with the magnetic sensor 06; a first driving motor 0401 drives the X-axis guide rail 0501 to drive the magnetic sensor 06 and the range finder 08 to move along the X axis; the two third driving motors 0403 drive the Z-axis guide rail 0503 to drive the X-axis guide rail 0501 to move along the Z-axis, so as to drive the magnetic sensor 06 and the range finder 08 to move along the Z-axis; the two second driving motors 0402 drive the Y-axis guide rails 0502 to drive the Z-axis guide rails 0503 to move along the Y-axis, so as to drive the magnetic sensor 06 and the range finder 08 to move along the Y-axis, and further realize the movement of the magnetic sensor 06 and the range finder 08 in the X-axis, the Y-axis and the Z-axis, and further realize the centering of the magnetic sensor 06 and the magnet 09 to be measured. In order to observe the situation in the magnetic field measurement device in real time, an illuminating lamp 15 and a camera 16 can be arranged in the shielding box 03, the camera 16 is connected with the terminal device 01, in the measurement process, the camera shoots images or videos in the shielding box 03 in real time and transmits the shot images or videos to the terminal device in real time, and the terminal device displays the images or plays the videos.

Before measurement, the coordinate system of the magnetic sensor 06 and the coordinate system of the magnet 09 to be measured need to be calibrated to the central origin. A control instruction is given to the controller 02 through the terminal device 01, the controller 02 controls the driving motor 04 to drive the guide rail 05 to drive the magnetic sensor 06 to move to a position L2 of 0mm, wherein L2 is L1-L, L2 is the distance between the magnetic sensor 06 and the magnet 09 to be measured, L1 is the measured value of the laser range finder, and L is the distance between the laser emitting port of the laser range finder and the magnetic sensor 06; and meanwhile, the magnetic sensor 06 is started to measure, and the Y-axis 0 point is centered. Based on the distribution principle of the magnetic field of the permanent magnet, the magnetic field strength is inversely proportional to the distance. Based on visual guidance of a video shot by a camera, the magnetic sensor 06 is roughly moved to the vicinity of the magnet support column 07, the driving motor 04 drives the guide rail to move along the Z axis, the X axis moves in the positive direction and the negative direction, and the moving distance is 0.5mm each time. The terminal device 01 can obtain X-axis magnetic induction Bx, Y-axis magnetic induction By, and Z-axis magnetic induction Bz through measurement By the magnetic sensor 06. The magnetic induction B can be calculated by the following formula:

during the movement, the terminal device 01 compares the magnetic induction B1 obtained by the last movement measurement with the magnetic induction B2 currently measured until the maximum magnetic induction point is found, records the operation absolute position information of the point driving motor 04 through the controller 02, and records the position information of the point on the terminal device 01, so that the point is the centering origin of the magnetic sensor 06 and the magnet 09 to be measured. Subsequent measurements can be made based on this point with test motion in the relevant direction. Subsequent multiple measurements with the magnet 09 to be measured fixed can be performed based on this point as the origin. If the magnet 09 to be measured is replaced, the centering and recording are carried out again.

The magnetic field measuring equipment provided by the embodiment of the invention comprises a terminal device 01, a controller 02, a shielding box 03, a driving motor 04, a guide rail 05, a magnetic sensor 06, a magnet supporting column 07 and a distance meter 08, wherein the driving motor 04, the guide rail 05, the magnetic sensor 06, the magnet supporting column 07 and the distance meter 08 are arranged in the shielding box, the terminal device 01 is in communication connection with the controller 02, and the controller 02 is in communication connection with the driving motor 04; the guide rails 05 include an X-axis guide rail 0501, a Y-axis guide rail 0502, and a Z-axis guide rail 0503, and the guide rails 05 are used to move the magnetic sensor 06 in the X-axis, the Y-axis, and the Z-axis, respectively; the magnetic sensor 06 and the distance meter 08 are disposed on the X-axis guide rail 0501; the magnet support column 07 is used for fixing a magnet 09 to be measured, and the magnet support column 07 is installed at a position parallel to and centered with the magnetic sensor 06; a shielding case 10 is provided outside the driving motor 04. The interference of an external magnetic field, electric appliances and the like in the magnetic field measurement process is eliminated, the coordinate of the permanent magnet is centered with the coordinate of the magnetic sensor, and the measurement precision of the magnetic induction intensity of the magnetic field of the permanent magnet is improved.

In some embodiments, as shown in fig. 3 and 5, the shielding cage 03 comprises an upper shield plate 0301, a lower shield plate 0302, a left shield plate 0303, a right shield plate 0304, a front switchable shield plate 0305 and a rear shield plate 0306. The upper shield plate 0301, the lower shield plate 0302, the left shield plate 0303, the right shield plate 0304 and the rear shield plate 0306 are fixedly connected through screws and the like. The front switchable shield 0305 is movably connected to the left shield 0303. Before starting the measurement, the front switchable shield 0305 is closed so that the whole magnetic field measurement device forms a closed magnetic field shield. The illuminating lamp 15 can be respectively installed on the left shielding plate 0303 and the right shielding plate 0304, the camera 16 is installed on the rear shielding plate 0306, when the measurement is started, the illuminating lamp 15 and the camera 16 are turned on, and in the measurement process, the motion state of the magnetic sensor 06 is monitored through the terminal device 01.

In some embodiments, the shielding box 03 and the shielding case 10 are made of magnetic shielding materials with relative vacuum permeability of more than 200. For example, the magnetic isolation material can be iron or cast iron, and the magnetic isolation material has no magnetism and can isolate an external magnetic field.

In some embodiments, as shown in fig. 6a and 6b, a first boss 0307 is disposed on the lower shield plate 0302, and the Y-axis guide 0502 is fixed on the first boss 0307; the magnet support column 07 is fixed to the first boss 0307.

Specifically, in order to ensure the centering property between the center of the magnet 09 to be measured and the center of the magnetic sensor 06, the centering property of the magnetic sensor 06 and the magnetic 09 to be measured are structurally ensured, and the lower shielding plate 0302 is a whole non-spliced plate, so that the processing is facilitated and the processing precision is ensured. The lower shielding plate 0302 is provided with a first boss 0307, the Y-axis guide rail 0502 is fixed on the first boss 0307, the magnet support column 07 is fixed on the first boss 0307, the flatness of the installation surface can be ensured mainly due to the fact that the machining surface of the whole plate is large and difficult, and the first boss 0307 is machined on the lower shielding plate 0302 to ensure the flatness of the Y-axis guide rail 0502 after installation. In the process of installing the guide rails, the mutual perpendicularity of the X-axis guide rail 0501, the Y-axis guide rail 0502 and the Z-axis guide rail 0503 needs to be ensured, the processing level is currently processed according to the industry of the guide rails, and the perpendicularity error can be controlled within 1 mm.

In some embodiments, as shown in fig. 7, 8 and 9, a clearance groove 0308 is disposed on the first boss 0307, the clearance groove 0308 penetrates through the lower shield plate 0302, and the clearance groove 0308 is disposed with a first step 0309; the bottom of the magnet support column 07 is provided with a first groove 0701 matched with the first step 0309.

Specifically, the lower shielding plate 0302 is provided with the magnet support column 07, and in order to ensure that the magnet support column 07 is convenient to mount, a clearance groove 0308 is arranged along the first boss 0307 and penetrating through the lower shielding plate 0302, and the shape of the clearance groove 0308 is matched with that of the magnet support column 07. The empty avoiding groove 0308 is provided with a first step 0309;

the bottom of the magnet support column 07 is provided with a first groove 0701 matched with the first step 0309. The first step 0309 has the functions of guiding and ensuring the processing precision of the clearance groove 0308. The clearance groove 0308 needs to ensure that the verticality of the first boss 0307 is within 0.1mm, and the first groove 0701 at the bottom of the magnet support column 07 needs to ensure that the flatness error of 4 matching surfaces is within 0.1 mm. Further, the magnet support column 07 is in clearance fit with the first boss 0307 and the lower shield plate 0302, and the fit clearance d1 is epsilon [0.02,0.12] mm. Therefore, the verticality and the vertical flatness of the magnet support column 07 arranged on the lower shielding plate 0302 can be guaranteed, and structural guarantee is provided for the positioning center of the magnet 09 to be detected. The magnet support column 07 is provided with a threaded hole 0703, the corresponding lower shielding plate 0302 is provided with a screw mounting step hole 030201, and the threaded hole 0703 and the screw mounting step hole 030201 are matched to lock the magnet support column 07 on the lower shielding plate 0302.

In some embodiments, as shown in fig. 10, the magnet support column 07 is provided with a magnet fixing block 0702, and the magnet support column 07 and the magnet fixing block 0702 are installed in a clearance fit manner and fixed through screws; the magnet fixing block 0702 and the magnet 09 to be detected are installed in a clearance fit mode and fixed through screws, and the fit clearance d2 is smaller than or equal to 0.1 mm.

Specifically, in order to realize that magnets to be tested in different shapes can be quickly replaced in the test process, the magnet support column 07 is provided with the magnet fixing block 0702, the magnet fixing block 0702 and the magnet support column 07 are installed in a clearance fit mode, and after the assembly is completed, the magnets are locked and fixed through screws. The magnet 09 to be tested is arranged in the magnet fixing block 0702, and is in clearance fit, the fit clearance d2 is not more than 0.1mm, and the magnet is fixed through screws. The shape of the magnet 09 to be measured can be square, cylindrical, spherical, half-moon-shaped, and the like. When the whole magnetic field measuring equipment is used for replacing magnets to be detected with different sizes and shapes, only the magnet fixing block 0702 and the magnet 09 to be detected need to be replaced, the magnet supporting column 07 does not need to be replaced, and the tool cost can be quickly replaced and saved. In the embodiment of the invention, the shape of the magnet 09 to be detected is cylindrical, and the groove of the magnet fixing block 0702 for accommodating the magnet 09 to be detected is in the shape of a double-section circular arc and a double-side cutting groove.

Specifically, taking the shape of the magnet 09 to be tested as an example, as shown in fig. 10, the groove of the magnet fixing block 0702 for accommodating the magnet 09 to be tested adopts a structural mode of a double-section arc and a double-side cutting groove, wherein a larger gap is left in the double-side cutting groove, so that the magnet fixing block 0702 can be conveniently installed and guided and fixed by screws. The two-section arc type adopts small clearance fit, the maximum clearance is not more than 0.1mm, and the cylindricity of the two-section arc and the verticality of the first grooving surface 0704 of the magnet support column 07 are both controlled to be 0.1mm during processing, so that the inclination error of the magnet fixing block 0702 is controlled. Further, the perpendicularity between the groove on the magnet fixing block 0702 for accommodating the magnet 09 to be tested and a second grooved surface (not shown in the figure) of the magnet fixing block 0702 should be less than 0.1mm, so that the perpendicularity between the magnet 09 to be tested and the first boss 0307 is ensured.

In some embodiments, as shown in fig. 11, the magnetic sensor 06 is integrated on a PCB circuit board 11, the PCB circuit board 11 is fixed on a cylinder 1201 of a fixing block 12 by a thermosetting positioning pin, the cylinder 1201 is integrally formed with the fixing block 12, the PCB circuit board 11 is provided with a matching arc 1101 and a trimming slot 1102 which are matched with the cylinder 1201, and the center of the magnetic sensor 06 coincides with the center of the matching arc 1101; the distance measuring instrument 08 is installed on the fixing block 12, and the installation surface of the distance measuring instrument 08 is perpendicular to the cylinder 1201.

Specifically, the magnetic sensor 06 is integrated on a PCB circuit board 11, the PCB circuit board 11 is fixed on a cylinder 1201 of a fixed block 12 by a thermosetting positioning pin, the cylinder 1201 and the fixed block 12 are integrally formed, and the fixed block 12 is mounted on an X-axis guide rail 0501. The PCB 11 is provided with a matching arc 1101 matched with the cylinder 1201, two sides of the PCB 11 are provided with trimming grooves 1102, and the PCB 11 is further provided with three first positioning holes 1103 uniformly distributed at 120 degrees. The positioning pin 17 is matched with the first positioning hole 1103 and adopts a small clearance fit mode, and the maximum fit clearance is less than or equal to 0.1 mm. The magnetic sensor 06 acquires magnetic induction intensity values of three axes, i.e., an X axis, a Y axis, and a Z axis, and the sensitivity of the magnetic sensor 06 is 0.2 uT. The center of the magnetic sensor 06 coincides with the center of the fitting circular arc 1101. The fixing block 12 and the cylinder 1201 can be made of metal, and the fitting arc 1101 of the PCB 11 and the cylinder 1201 are fitted with a small gap, with a fitting maximum gap being less than or equal to 0.15 mm. The trimming grooves 1102 on the two sides of the PCB 11 are in large clearance fit with the cylinder 1201, the minimum clearance is 1mm, and the two trimming grooves 1102 play a role in guiding and preventing the PCB from being installed and misplacing. The cylinder 1201 has a second locating hole 1203, and the locating pin 17 adopts plastics material, and locating pin 17 adopts interference fit with first locating hole 1103, second locating hole 1203. The PCB 11 is finally fixed and positioned by means of the positioning pins 17. As shown in FIG. 12, the initial installation of the positioning pin 17 is an optical axis cylinder 1701, and then the hot melting fixture with high temperature forms a stepped cylinder 1702 similar to a nut, compared with the traditional screw fixing mode, the positioning accuracy is high, the integral hot melting is uniform in stress on the fixing position of the PCB 11, and the warping and deformation of the PCB 11 cannot be caused. The cylindrical body 1201 is provided with a PCB lead trace groove 1202 for conveniently fixing the trace. The distance measuring instrument 08 is installed on the fixed block 12, the installation surface of the distance measuring instrument 08 is perpendicular to the cylinder 1201, the machining verticality is guaranteed to be smaller than 0.05mm, and meanwhile, the concentricity of the cylinder 1201 and the matching arc 1101 needs to be controlled within 0.1 mm. The distance meter 08 may be a laser distance meter, and the distance meter 08 is used for measuring the distance Y direction between the magnetic sensor 06 and the magnet 09 to be measured. If the distance from the laser emitting port of the laser range finder to the magnetic sensor 06 is L, the distance L2 between the magnetic sensor 06 and the magnet 09 to be measured is the actual measurement value L1-L of the laser range finder.

In some embodiments, as shown in fig. 13, a roller bracket 13 is installed at the bottom of the shielding box, and a moving roller 14 is installed on the roller bracket, so that the whole magnetic field measurement device is convenient to move, and the measurement convenience is improved.

According to the magnetic field measuring device provided by the embodiment of the invention, the shielding box 03 and the shielding cover 10 are used for shielding electromagnetism generated by geomagnetism, motors, electric appliances and the like, so that the interference influence of an internal magnetic field and an external magnetic field on the measurement of the magnetic induction intensity of the magnet 09 to be measured is eliminated; the magnetic sensor 06 and the magnet 09 to be measured are centered by the movement of the magnetic sensor 06 in the X axis, the Y axis and the Z axis, the distance meter and the fixation of the magnet 09 to be measured, so that the measurement accuracy of the three-dimensional magnetic field of the magnet 09 to be measured is improved.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention. It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.

In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.