Three-axis correction device of fluxgate

Abstract

The utility model relates to the technical field of fluxgate correction, in particular to a three-axis correction device of a fluxgate, which comprises a triangular support, a hollow bottom plate arranged at the top of the triangular support, a first motor fixedly connected to the front side of the bottom of the hollow bottom plate, a driving shaft fixedly connected to the output end of the first motor, and a driving wheel fixedly connected to the outer side of the driving shaft. A driven shaft is rotationally connected to the middle of the lower portion in the hollow bottom plate, and a driven wheel is fixedly connected to the outer side of the driven shaft; through design cooperation of the first rotating table, the second rotating table and the third rotating table, the device can correct the fluxgate, when the device is used, the fluxgate is installed at the center of the third rotating table, data collection is started, three shafts are rotated by 360 degrees respectively, correction coefficients are calculated after rotation is completed, and the numerical value of the fluxgate is corrected through the correction coefficients. The measuring axis of the three-axis magnetometer can be effectively adjusted, and the accuracy of magnetic field measurement is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fluxgate correction, especially to a three-axis correction device of fluxgate. BACKGROUND

[0002] The fluxgate is an electromagnetic induction device, mainly used for measuring the magnetic field intensity, and its working principle is based on the magnetization characteristics of ferromagnetic material under the external magnetic field.

[0003] In order to accurately measure the magnetic field, it is usually necessary to obtain the vector information of the magnetic field, i.e. the strength and direction of the magnetic field, which is usually achieved by using a three-axis magnetometer to correct the fluxgate, because the three-axis magnetometer can measure the components of the magnetic field in three mutually perpendicular axes at the same time.

[0004] The ideal working state of the existing three-axis magnetometer is that the three measurement axes are completely orthogonal, usually marked as X, Y and Z axes, i.e. the included angle between them is 90°, but in the actual manufacturing process, due to process limitations or other factors, it is difficult for the three axes to reach the state of complete orthogonality, and this non-orthogonality will cause cross interference in the measurement results, thereby affecting the accurate measurement of the magnetic field.

[0005] To solve the above problems, a three-axis correction device of fluxgate is proposed in the present application. CONTENT OF THE UTILITY MODEL

[0006] To solve the problems proposed in the above background technology, the utility model provides a three-axis correction device of fluxgate, which can compensate for the sensitivity difference of each axis and ensure the consistency of the sensitivity of the three axes.

[0007] In order to achieve the above object, the utility model discloses the following technical scheme: A kind of three-axis correction device of fluxgate, including triangular support, the hollow bottom plate is arranged at the top of the triangular support, the first motor is fixedly connected with the front side of the bottom of the hollow bottom plate, the output end of the first motor is fixedly connected with driving shaft, the driving shaft is fixedly connected with driving wheel outside, the belt is arranged outside the driving wheel, the passive shaft is rotatably connected with the middle below inside the hollow bottom plate, the passive shaft is fixedly connected with driven wheel outside, the first rotary table is fixedly connected with the top of the passive shaft, the fixed seat is fixedly connected with the top of the left and right sides of the first rotary table, the second rotary table is rotatably connected with the inside of the fixed seat, the fixed seat inside the right side of the top of the first rotary table is rotatably connected with handle, the second motor is fixedly connected with the middle of the rear inside of the second rotary table, the output end of the second motor is fixedly connected with frame, the balance shaft is rotatably connected with the middle of the front inside of the second rotary table, the third rotary table is fixedly connected with the lower end surface of the frame, and the third rotary table is provided with rubber layer.

[0008] As a kind of three-axis correction device of fluxgate of the utility model preferably, the middle inside of the fixed seat is contacted with the side of belt away from driving wheel, the bottom of the first rotary table is contacted with the top of hollow bottom plate, one end of handle close to fixed seat is fixedly connected with the middle of the right end surface of second rotary table, one end of balance shaft away from second rotary table is fixedly connected with the front end surface of the frame of the top of the front side of third rotary table, can be corrected to fluxgate, when using, the center of third rotary table is installed to fluxgate, starts to gather data, respectively to three axes 360 ° rotation, after completion, calculates correction coefficient, and the value of fluxgate is corrected through correction coefficient, and through accurate correction algorithm, the sensitivity difference of each axis can be compensated, ensure that the sensitivity consistency of three axes, thereby reduce the deviation of measurement result, improve the reliability of measurement.

[0009] As a kind of three-axis correction device of fluxgate of the utility model preferably, the middle of the upper inside of the hollow bottom plate and the middle of the front side of the lower inside are all provided with through hole, the aperture of the through hole of the middle of the upper inside of the hollow bottom plate is matched with the diameter of the transverse section of passive shaft, and the aperture of the through hole of the middle of the front side of the lower inside of the hollow bottom plate is matched with the diameter of the transverse section of driving shaft, the driving wheel, driven wheel and belt are all in the inside of hollow bottom plate, can let the first motor of the front side of the bottom of hollow bottom plate drive the first rotary table of the middle of the top of hollow bottom plate to rotate, realize the purpose that the first rotary table rotates 360 °.

[0010] As the three-axis correction device of the fluxgate of the utility model optimally, the first rotating table, the second rotating table and the third rotating table can all rotate 360°, the first rotating table can rotate 360° horizontally on the top of the hollow bottom plate, the second rotating table can rotate 360° longitudinally inside the fixed seat, the third rotating table can rotate 360° longitudinally on the front and back ends inside the second rotating table, the correction coefficient can be calculated after rotation, the value of the fluxgate is corrected through the correction coefficient, the measurement axis of the three-axis magnetometer can be effectively adjusted to reach the orthogonal state as much as possible.

[0011] As the three-axis correction device of the fluxgate of the utility model optimally, the left and right sides of the middle of the second rotating table are both provided with rotating shafts, and the rotating shafts are limited to rotate by the upper inside of the fixed seat, the rotating shaft in the fixed seat on the right top of the first rotating table is fixedly connected with the front top of the handle, the handle is rotated, and the purpose that the second rotating table rotates 360° inside the fixed seat is achieved.

[0012] As the three-axis correction device of the fluxgate of the utility model optimally, the number of the frames is two, and the frames are distributed on the front and back top end positions of the top of the third rotating table, the output shaft is arranged on the output end of the second motor, and the middle of the rear end face of the frame behind the top of the third rotating table is fixedly connected with the end, away from the second motor, of the output shaft, the purpose that the second motor drives the third rotating table to rotate 360° inside the second rotating table is achieved.

[0013] As the three-axis correction device of the fluxgate of the utility model optimally, the rubber layers are uniformly wrapped on the surfaces of the third rotating tables, and the thickness of the rubber layers is 3mm, the friction between the fluxgate installed at the center of the third rotating table and the third rotating table can be increased, and the stability of the fluxgate installed at the center of the third rotating table is improved to a certain extent.

[0014] The utility model has the advantages of the following beneficial effects:

[0015] The three-axis correction device of the fluxgate of the utility model is designed to cooperate with the first rotating table, the second rotating table and the third rotating table, so that the device can correct the fluxgate, the fluxgate is installed at the center of the third rotating table during use, data is collected, three axes are rotated 360° respectively, the correction coefficient is calculated after completion, the value of the fluxgate is corrected through the correction coefficient, the measurement axis of the three-axis magnetometer can be effectively adjusted to reach the orthogonal state as much as possible, cross interference is significantly reduced, the accuracy of the magnetic field measurement is improved, the sensitivity difference of each axis can be compensated through the accurate correction algorithm, the sensitivity consistency of the three axes is ensured, the deviation of the measurement result is reduced, and the reliability of the measurement is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0018] Figure 2 It is a schematic diagram of the longitudinal section structure of the hollow bottom plate of the present application;

[0019] Figure 3 It is a schematic diagram of the explosion structure of the second rotary table of the present application;

[0020] Figure 4 It is a schematic diagram of the longitudinal section structure of the third rotary table of the present application;

[0021] Figure 5 It is a schematic diagram of the relationship between the three axes of the magnetic sensor in the fluxgate and the coordinate axes.

[0022] Legend:

[0023] 1, triangular support; 2, hollow bottom plate; 3, first motor; 4, first rotary table; 5, fixed seat; 6, handle; 7, second rotary table; 8, second motor; 9, frame; 10, rubber layer; 11, balance shaft; 12, driving shaft; 13, driving wheel; 14, belt; 15, driven wheel; 16, driven shaft; 17, third rotary table. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] Embodiment 1

[0026] As shown in the drawings; Figures 1 to 5

[0027] A three-axis correction device of a fluxgate, comprising a triangular support 1.

[0028] ​In this embodiment: as disclosed in the background art above, "the ideal working state of the existing three-axis magnetometer in use is that the three measurement axes are completely orthogonal, usually marked as X, Y and Z axes, that is, the included angle between them is 90°, but in the actual manufacturing process, due to process limitations or other factors, it is often difficult to achieve the state of complete orthogonality, and this non-orthogonality will cause cross interference in the measurement results, thereby affecting the accurate measurement of the magnetic field" In combination, this problem is obviously a problem that exists and is difficult to solve, and therefore, in order to solve this technical problem, a hollow bottom plate 2 and a first motor 3 are added in the present application file;

[0029] Further, as shown in the following:

[0030] As shown in the following: Figures 1 to 5

[0031] In combination with the above: the triangular support 1 is provided with a hollow bottom plate 2 at the top, the hollow bottom plate 2 is fixedly connected with a first motor 3 at the bottom front side, the output end of the first motor 3 is fixedly connected with a driving shaft 12, the outer side of the driving shaft 12 is fixedly connected with a driving wheel 13, the outer side of the driving wheel 13 is provided with a belt 14, the inner bottom side of the hollow bottom plate 2 is rotatably connected with a driven shaft 16, the outer side of the driven shaft 16 is fixedly connected with a driven wheel 15, the top of the driven shaft 16 is fixedly connected with a first rotary table 4, the top of the left and right sides of the first rotary table 4 is fixedly connected with a fixed seat 5, the inner side of the fixed seat 5 is rotatably connected with a second rotary table 7, the inner side of the rear of the second rotary table 7 is fixedly connected with a second motor 8, the output end of the second motor 8 is fixedly connected with a frame 9, the inner side of the front of the second rotary table 7 is rotatably connected with a balance shaft 11, the inner end face of the bottom of the frame 9 is fixedly connected with a third rotary table 17, the surface of the third rotary table 17 is provided with a rubber layer 10, the inner side of the middle of the fixed seat 5 is in contact with the side of the belt 14 away from the driving wheel 13, the bottom of the first rotary table 4 is in contact with the top of the hollow bottom plate 2, the end of the handle 6 close to the fixed seat 5 is fixedly connected with the right end face of the second rotary table 7, and the end of the balance shaft 11 away from the second rotary table 7 is fixedly connected with the front end face of the frame 9 at the top of the front side of the third rotary table 17.

[0032] In this embodiment: the magnetic flux gate can be corrected, the magnetic flux gate is installed to the center of the third rotary table 17 in use, data collection is started, 360° rotation is performed on the three axes respectively, correction coefficients are calculated after completion, the values of the magnetic flux gate are corrected through the correction coefficients, and through the accurate correction algorithm, the sensitivity difference of each axis can be compensated, the consistency of the sensitivities of the three axes is ensured, the deviation of the measurement results is reduced, and the reliability of the measurement is improved.

[0033] ​In an optional embodiment, the hollow base plate 2 is internally provided with a through hole in the upper middle part and the front middle part of the lower part, the diameter of the through hole in the upper middle part of the hollow base plate 2 matches the diameter of the transverse section of the driven shaft 16, and the diameter of the through hole in the front middle part of the lower part of the hollow base plate 2 matches the diameter of the transverse section of the driving shaft 12, the driving wheel 13, the driven wheel 15 and the belt 14 are all inside the hollow base plate 2.

[0034] In this embodiment, the first motor 3 at the front side of the bottom of the hollow base plate 2 drives the first rotating table 4 in the middle of the top of the hollow base plate 2 to rotate, achieving the purpose of 360° rotation of the first rotating table 4.

[0035] In an optional embodiment, the first rotating table 4, the second rotating table 7 and the third rotating table 17 can all rotate 360°, the first rotating table 4 can rotate 360° horizontally on the top of the hollow base plate 2, the second rotating table 7 can rotate 360° longitudinally inside the fixed seat 5, and the third rotating table 17 can rotate 360° longitudinally at the front and back ends inside the second rotating table 7.

[0036] In this embodiment, the correction coefficient is calculated after rotation, and the value of the fluxgate is corrected by the correction coefficient, which can effectively adjust the measurement axis of the three-axis magnetometer to achieve the orthogonal state as much as possible.

[0037] In an optional embodiment, the left and right sides of the inside middle part of the second rotating table 7 are provided with rotating shafts, and the rotating shafts outside are limited to rotate by the inside upper part of the fixed seat 5, and the rotating shaft in the fixed seat 5 at the top right side of the first rotating table 4 is fixedly connected with the front top end of the handle 6.

[0038] In this embodiment, the handle 6 is rotated to achieve the purpose of 360° rotation of the second rotating table 7 inside the fixed seat 5.

[0039] In an optional embodiment, the number of the frame 9 is two, and the frame 9 is distributed at the front and back top end positions of the top of the third rotating table 17, the output shaft of the second motor 8 is fixedly connected with the middle of the rear end surface of the frame 9 at the back top of the third rotating table 17.

[0040] In this embodiment, the second motor 8 drives the third rotating table 17 to rotate 360° inside the second rotating table 7.

[0041] In an optional embodiment, the rubber layer 10 uniformly wraps the surface of the third rotating table 17, and the thickness of the rubber layer 10 is 3mm.

[0042] In this embodiment: can increase the friction between the magnetic flux gate installed at the center of the third rotating table 17 and the third rotating table 17, and improve the stability of the magnetic flux gate installed at the center of the third rotating table 17 to a certain extent.

[0043] The working principle and use process of the utility model: the three axes of the magnetic sensor in the magnetic flux gate are X, Y and Z, and the output signals are Bx, By and Bz, wherein the Z1 axis coincides with the Z axis, the angle between the OY axis and the OY1 axis is β, the angle between the OX axis and the X1OY1 plane is α, and the angle between the OX axis and the Z1OX1 plane is γ, under the above assumptions, the output of the magnetic sensor is as follows:

[0044]

[0045] According to the coordinate transformation, the projection Bx1, By1 and Bz1 of the geomagnetic vector B on the coordinate axis are expressed as the function of the magnetometer output Bx, By and Bz, so there are the following formulas:

[0046]

[0047] Through the rotating table, the Bx, By and Bz data under different angles are obtained, the equation set is established, the correction coefficient is solved, the magnetometer output is corrected by using the correction coefficient, and more accurate magnetic field measurement value is obtained, and the following is the rotating operation of the first rotating table 4, the second rotating table 7 and the third rotating table 17:

[0048] The triangular support 1 is expanded outwardly and placed in a set position, and after being placed, the fluxgate is installed at the top center position of the third rotating table 17, at this time, the bottom of the fluxgate is in contact with the rubber layer 10 on the surface of the third rotating table 17, after being fixed, the fluxgate is opened, the magnetic sensor in the fluxgate operates, the first motor 3 at the middle of the front side of the bottom of the hollow bottom plate 2 is started, the first motor 3 drives the driving shaft 12 at the output end to rotate, the driving wheel 13 on the outer side of the driving shaft 12 drives the driven wheel 15 to rotate through the belt 14, and the driven shaft 16 in the driven wheel 15 drives the first rotating table 4 at the top to rotate, and the fluxgate at the top of the third rotating table 17 rotates transversely by 360° and then stops, then the user holds the handle 6 and also rotates by 360°, the handle 6 drives the second rotating table 7 at the inner end face of the fixed seat 5 to rotate longitudinally from front to back, at this time, the fluxgate rotates longitudinally from front to back synchronously with the second rotating table 7, the handle 6 is stopped after rotating by 360°, and finally, the second motor 8 at the back of the inner side of the second rotating table 7 is opened, the second motor 8 drives the frame 9 at the top back of the third rotating table 17 to rotate through the output shaft at the output end, and the frame 9 at the top back of the third rotating table 17 drives the third rotating table 17 and the frame 9 at the top front side of the third rotating table 17 to rotate longitudinally from left to right synchronously, the balance shaft 11 at the front end of the inner side of the second rotating table 7 limits the frame 9 at the top front side of the third rotating table 17, the second motor 8 is stopped after rotating by 360°, after the data of the magnetic sensor is collected, the correction coefficient is calculated, the value of the fluxgate is corrected through the correction coefficient, the measurement axis of the three-axis magnetometer can be effectively adjusted to reach the orthogonal state as much as possible, so that the cross interference is significantly reduced, and the accuracy of the magnetic field measurement is improved.

[0049] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A three-axis correction device for a fluxgate, comprising a triangular support (1), characterized in that: The triangular support (1) top is provided with a hollow bottom plate (2), the hollow bottom plate (2) bottom front side is fixedly connected with a first motor (3), the first motor (3) output end is fixedly connected with a driving shaft (12), the driving shaft (12) outer side is fixedly connected with a driving wheel (13), the driving wheel (13) outer side is provided with a belt (14), the hollow bottom plate (2) inside lower middle is rotatably connected with a driven shaft (16), the driven shaft (16) outer side is fixedly connected with a driven wheel (15), the driven shaft (16) top is fixedly connected with a first rotary table (4), the first rotary table (4) left and right two sides top end is fixedly connected with a fixed seat (5), the fixed seat (5) inner side is rotatably connected with a second rotary table (7), the first rotary table (4) top right side fixed seat (5) inside is rotatably connected with a handle (6), the second rotary table (7) inner side rear middle is fixedly connected with a second motor (8), the second motor (8) output end is fixedly connected with a frame (9), the second rotary table (7) inner side front middle is rotatably connected with a balance shaft (11), the frame (9) inner end face lower side is fixedly connected with a third rotary table (17), the third rotary table (17) surface is provided with a rubber layer (10).

2. A three-axis correcting device for a fluxgate according to claim 1, characterized in that: The fixed seat (5) middle inner side contacts with the belt (14) side away from the driving wheel (13), the first rotary table (4) bottom contacts with the hollow bottom plate (2) top, the handle (6) end close to the fixed seat (5) is fixedly connected with the second rotary table (7) right end face middle, the balance shaft (11) end away from the second rotary table (7) is fixedly connected with the frame (9) front end face of the third rotary table (17) front side top end.

3. A three-axis correcting device for a fluxgate according to claim 1, characterized in that: The hollow bottom plate (2) inside upper middle and inside lower front middle are both provided with a through hole, the through hole caliber of the hollow bottom plate (2) inside upper middle matches with the transverse section diameter of the driven shaft (16), and the through hole caliber of the hollow bottom plate (2) inside lower front middle matches with the transverse section diameter of the driving shaft (12), the driving wheel (13), the driven wheel (15) and the belt (14) are all in the hollow bottom plate (2) inside.

4. A three-axis correcting device for fluxgate according to claim 1, characterized in that: The first rotary table (4), the second rotary table (7) and the third rotary table (17) can all rotate 360°, the first rotary table (4) can horizontally rotate 360° on the hollow bottom plate (2) top, the second rotary table (7) can longitudinally rotate 360° in the fixed seat (5) inner side, the third rotary table (17) can longitudinally rotate 360° on the second rotary table (7) inner side front and back ends.

5. A three-axis correcting device for fluxgate according to claim 1, characterized in that: The left and right sides of the second rotary table (7) inside middle are both provided with a rotating shaft, and the rotating shaft outer side is limited to rotate by the fixed seat (5) inside upper side, the rotating shaft in the fixed seat (5) right side top end is fixedly connected with the handle (6) front side top end.

6. A three-axis correcting device for fluxgate according to claim 1, characterized in that: The number of the frame (9) is two, and the frame (9) is distributed on the top of the third rotating table (17) on both sides of the front and rear top end position, the output end of the second motor (8) is provided with an output shaft, and the end of the output shaft away from the second motor (8) is fixedly connected with the rear end surface of the frame (9) on the top of the third rotating table (17).

7. A three-axis correcting device for a fluxgate according to claim 1, characterized in that: The rubber layer (10) is uniformly wrapped on the surface of the third rotating table (17), and the thickness of the rubber layer (10) is 3mm.

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