A bevel gear-based non-magnetic testing device and testing method

Abstract

The application discloses a kind of based on bevel gear's non-magnetic testing device and testing method, including driving mechanism, first rotating shaft, first bevel gear, second bevel gear, second rotating shaft, first bevel gear is fixedly connected with first rotating shaft, driving mechanism drives first rotating shaft to drive first bevel gear rotation, first bevel gear is rotated to second bevel gear, so that second bevel gear rotates around second rotating shaft;Second bevel gear is used as object platform, for carrying measured object, by setting the tooth engagement angle of first bevel gear, second bevel gear, in the case where first rotating shaft is fixed, so that measured object carried on second rotating shaft obtains the measurement angle of space arbitrary direction.The application uses a bevel gear to carry measured object, so that the rotating shaft of rotary table and the rotating shaft of driving mechanism are at any angle, and the structure is compact, improves use flexibility, and is suitable for only a small amount of opening exists closed magnetic shielding space use.

Description

TECHNICAL FIELD

[0001] The present application relates to a non-magnetic testing device and testing method, in particular to a non-magnetic testing device and testing method based on bevel gears. BACKGROUND

[0002] In the calibration test of magnetometers, the measurement of the magnetic properties of objects, and other applications, it is necessary to change the orientation of the object to be tested, but at the same time it is not desirable to introduce additional magnetic field interference, so it is necessary to use a non-magnetic testing device that can change the direction of the object to be tested. At the same time, in order to reduce the interference of external magnetic fields, it is often necessary to place the object to be tested in a closed magnetic shielding space to shield external magnetic fields.

[0003] However, in general, to rotate an object to be tested, a driving mechanism such as a motor or engine is used to drive rotation, and in this process, the movement of the magnetic components in the driving mechanism such as the motor or engine will introduce magnetic field interference.

[0004] One solution is to pass the rotation through a shaft to a turntable carrying the object to be tested, so that the driving motor or engine driving mechanism is away from the turntable, thereby reducing the magnetic field interference of the driving mechanism on the turntable. But in this setting, the rotation axis of the turntable is coaxial with the axis of the driving mechanism, limiting the flexibility of the direction of use of the turntable.

[0005] Especially when used with a magnetic shielding space, due to the design process of the magnetic shielding space to reduce the impact on the magnetic shielding performance, only a small number of small openings are left on the magnetic shielding layer, so the transmission shaft can only pass through these openings to transmit rotation to the magnetic shielding space, which imposes many restrictions on the direction of rotation.

[0006] Prior Art 1: 202311253332.6, a magnetic field controllable angle controllable magnetic testing device and measurement method, as shown in Figure 1 The magnetic shielding cylinder cover and the magnetic shielding cylinder form a closed magnetic shielding space, the non-magnetic turntable driver drives the non-magnetic turntable drive rod, the magnetic turntable drive rod passes through the opening on the magnetic shielding cylinder into the magnetic shielding space, and drives the non-magnetic turntable object table to rotate.

[0007] The rotation direction of the non-magnetic turntable object table in this prior art 1 is coaxial with the rotation of the non-magnetic turntable driver, and since the number and position of the openings on the magnetic shielding space are usually limited, the rotation direction of the turntable is subject to many restrictions.

[0008] Prior Art 2: 202110033602.7, a measuring device for extremely weak residual magnetic materials and a measuring method, as shown in Figure 2As shown, the motor and transmission member are provided; the non-magnetic rotary table is connected with the motor through the transmission member. Since the transmission member is a belt in the technology, the direction of the rotating shaft of the non-magnetic rotary table is still obviously limited. SUMMARY

[0009] In view of the problems in the prior art, the purpose of the present application is to provide a non-magnetic testing device based on bevel gears, which can make the rotating shaft of the rotary table and the rotating shaft of the driving mechanism form an arbitrary angle, and has a compact structure. Another purpose of the present application is to provide a testing method using the above non-magnetic testing device.

[0010] To achieve the above-mentioned purposes, the non-magnetic testing device based on bevel gears comprises a driving mechanism (1), a first rotating shaft (2), a first bevel gear (3), a second bevel gear (4), and a second rotating shaft (5), wherein the first bevel gear (3) is fixedly connected with the first rotating shaft (2), the driving mechanism (1) drives the first rotating shaft (2) to drive the first bevel gear (3) to rotate, and the first bevel gear (3) transmits the rotation to the second bevel gear (4) to make the second bevel gear (4) rotate around the second rotating shaft (5).

[0011] The second bevel gear (4) serves as a carrier platform for carrying the object to be measured, and by setting the tooth engagement angle of the first bevel gear (3) and the second bevel gear (4), the object to be measured carried on the second rotating shaft (5) can obtain a measurement angle in any direction in space under the condition that the first rotating shaft (2) is fixed.

[0012] Further, the driving mechanism (1) is a motor, an engine or a hand wheel.

[0013] Further, the first rotating shaft (2), the first bevel gear (3), the second bevel gear (4) and the second rotating shaft (5) are all placed in a magnetic shielding space (9).

[0014] Further, the second rotating shaft (5) is fixed through a second fixing member (7) to ensure that the second rotating shaft (5) can freely rotate around the second fixing member (7) in the axial direction but cannot displace in the axial direction; the first rotating shaft (2) is fixed through a first fixing member (6) to ensure that the first rotating shaft (2) can freely rotate around the first fixing member (6) in the axial direction but cannot displace in the axial direction.

[0015] Further, the first fixing member (6) and the second fixing member (7) are arranged at a set position, so that the positions between them are relatively fixed, and the apexes of the first bevel gear (3) and the second bevel gear (4) coincide, and the pitch cone surfaces of the first bevel gear (3) and the second bevel gear (4) are tangent at a point to form a line contact, so that the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) are engaged.

[0016] Further, the first fixing member (6) and the second fixing member (7) are both fixed on the third fixing member (8)

[0017] Further, a plurality of mounting holes are arranged on the third fixing member (8) at different positions, and the mounting holes are used for mounting the second fixing member (7), and by adjusting different mounting positions of the second fixing member (7), different second bevel gears (4) are adapted, and the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) are guaranteed to be engaged with each other, and meanwhile, the second bevel gear (4) forms a sample platform with different angles.

[0018] Further, a sliding groove is arranged on the third fixing member (8) in the horizontal direction, and the sliding groove is used for moving the second fixing member (7) leftward and rightward, and by adjusting different fixing positions of the second fixing member (7), different second bevel gears (4) are adapted, and the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) are guaranteed to be engaged with each other, and meanwhile, the second bevel gear (4) forms a sample platform with different angles.

[0019] The application further provides a non-magnetic testing method based on a bevel gear, and the non-magnetic testing method is realized based on the non-magnetic testing device.

[0020] Further, the non-magnetic testing method is specifically as follows:

[0021] The magnetic field coil is arranged in the magnetic shielding space (9) in the axial direction, the non-magnetic turntable is arranged in the magnetic field coil, and the object to be tested, such as a magnetometer or a magnetic object, is arranged on the non-magnetic turntable.

[0022] When the direction error of the magnetometer is measured, the object to be tested, such as a magnetometer, is arranged on the non-magnetic turntable, a set magnetic field value is generated by the magnetic field coil, then the turntable is rotated, and the readings of the magnetometer in different directions are compared, so that the reading error of the magnetometer caused by the change of the direction of the magnetometer, that is, the direction error or the turning difference, is obtained.

[0023] In the process of testing the reading accuracy, the reading linearity and the frequency response parameters of the magnetometer in different directions, the object to be tested, such as a magnetometer, is arranged on the non-magnetic turntable, the turntable is first fixed in a set direction, then the magnetic field is set to be of different sizes and the reading of the magnetometer is measured, so that the reading accuracy, the reading linearity and the frequency response parameters of the magnetometer in the set direction are obtained, and then the direction of the turntable is changed and the related characteristics of the magnetometer in the new direction are measured.

[0024] In the test of the magnetic characteristics of the object, the object to be tested is carried on the non-magnetic turntable, a background magnetic field is set according to requirements in the vicinity of the object, a magnetometer for recording the magnetic signal of the object is arranged in the vicinity, then the second bevel gear (4) is driven to rotate by the driving mechanism (1), the direction of the object to be tested is changed, and the change of the reading of the magnetometer is recorded, so that the magnetic spatial distribution characteristics of the object are obtained.

[0025] In all the above tests, the test process can be repeated after changing the direction of the second rotating shaft (5) to obtain multiple sets of test results.

[0026] The beneficial effects of this invention are as follows:

[0027] This invention discloses a non-magnetic testing device and its testing method based on bevel gear transmission. One of the bevel gears is used to carry the object to be tested, which allows the rotation axis of the turntable to be at any angle with the rotation axis of the drive mechanism. The device has a compact structure, improves the flexibility of use, and is suitable for use in enclosed magnetically shielded spaces with only a few openings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of prior art 1;

[0029] Figure 2 This is a schematic diagram of prior art 2;

[0030] Figure 3 This is a schematic diagram of the structure of the present invention;

[0031] Figure 4 A schematic diagram of the structure after replacing the second bevel gear with a different cone angle β;

[0032] Figure 5 This is a schematic diagram showing the different angles formed after the structure is rotated;

[0033] Figure 6 This is a schematic diagram of the structure of Example 1. Detailed Implementation

[0034] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] The following combination Figures 3-6 Specific embodiments of the present invention will be described in detail below. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the present invention.

[0038] This invention discloses a non-magnetic testing device based on bevel gears, comprising a drive mechanism (1), a first rotating shaft (2), a first bevel gear (3), a second bevel gear (4), and a second rotating shaft (5). The first bevel gear (3) is fixedly connected to the first rotating shaft (2). The drive mechanism (1) drives the first rotating shaft (2) to rotate the first bevel gear (3). The first bevel gear (3) transmits its rotation to the second bevel gear (4), causing the second bevel gear (4) to rotate around the second rotating shaft (5). The second bevel gear (4) itself serves as a platform for carrying the object to be tested.

[0039] The drive mechanism (1) can be a motor, engine, handwheel, etc. The first shaft (2), first bevel gear (3), second bevel gear (4), and second shaft (5) can be placed in the magnetic shielding space (9). The magnetic shielding space (9) is optional and not mandatory. By setting the meshing angle of the first bevel gear (3) and the second bevel gear (4), the second shaft (5) can be moved in any direction in space when the direction of the first shaft (2) is fixed, which improves the flexibility of use.

[0040] like Figure 3 As shown, the pitch angle of the first bevel gear (3) is α, the pitch angle of the second bevel gear (4) is β, the shaft intersection angle of the two bevel gears is θ=α+β, the pitch apex of the two bevel gears coincides at point A, and the pitch cone surfaces of the two bevel gears are tangent at a point, forming a line contact, so that the tooth surfaces of the two gears mesh with each other. In order to introduce the way to change the angle of the second shaft (5), the fixing method of the gear shaft will be further introduced first.

[0041] The first rotating shaft (2) is fixed by the first fixing member (6) to ensure that the first rotating shaft (2) can rotate freely around its axis, but cannot be displaced along the axis. There are many design methods to meet this requirement. One specific example is to set a hole on the first fixing member (6) and put in a bearing. The first rotating shaft (2) is connected to the first fixing member (6) through the bearing, so that the first rotating shaft (2) can rotate around the axis. At the same time, an upper limit device is added to the shaft so that the first rotating shaft (2) cannot be displaced along the axis.

[0042] Similarly, the second rotating shaft (5) is fixed by the second fixing member (7) to ensure that the second rotating shaft (5) can rotate freely around its axis, but cannot be displaced along the axis.

[0043] In use, the first fixing member (6) and the second fixing member (7) are positioned in appropriate locations so that their relative positions are fixed, and the apexes of the pitch cones of the first bevel gear (3) and the second bevel gear (4) coincide, and the pitch cone surfaces of the two bevel gears are tangent at a point to form precise line contact, thereby enabling the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) to mesh. Specifically, the first fixing member (6) and the second fixing member (7) can be fixed to the same third fixing member (8), or they can be fixed to other objects respectively.

[0044] The methods for changing the angles of the second bevel gear (4) and the second shaft (5) include the following four:

[0045] Method 1: Replace the second bevel gear (4) with a different cone angle β so that the second bevel gear (4) forms a loading platform with different angles. Use another bevel gear with a different cone angle β as the second bevel gear (4) to change the shaft intersection angle θ between the two gears. Replace the second fixing part (7) with a suitable height and mounting shaft angle to ensure that the cone apex of the first bevel gear (3) and the second bevel gear (4) coincide at point A, and that the pitch cone surfaces of the first bevel gear (3) and the second bevel gear (4) are tangent at a point to form a precise line contact, so that the tooth surfaces of the two gears mesh with each other.

[0046] To facilitate the replacement of the second fastener (7), there are several different methods, such as setting mounting holes at different positions on the third fastener (8), or setting along the third fastener (8). Figure 3 The horizontal groove allows for easy movement along the middle section when replacing the second fastener (7). Figure 3The second fixing member (7) is moved horizontally left and right, and finally fixed in the predetermined position, ensuring that the apex of the two gears coincides at point A, and that the pitch cone surfaces of the two bevel gears are tangent at a point, forming a precise line contact, so that the tooth surfaces of the two gears mesh with each other. When fixing the second fixing member (7), various methods such as screw fixing, pressure plate fixing, and buckle fixing can be used for fixing.

[0047] Method 2: Replace the first bevel gear (3) with a different cone angle α, and use another bevel gear with a different cone angle α as the first bevel gear (3), thereby changing the shaft intersection angle θ between the two gears, so that the second bevel gear (4) forms a loading platform with a different angle; at the same time, replace the second fixing part (7) with a suitable height and mounting shaft angle to ensure that the cone apex of the two gears coincides at point A, and the pitch cone surfaces of the two bevel gears are tangent at a point, forming a precise line contact, so that the tooth surfaces of the two gears mesh with each other. The method of replacing the second fixing part (7) here is the same as described in Method 1.

[0048] Method 3: Simultaneously replace the first bevel gear (3) with a different cone angle α and the second bevel gear (4) with a different cone angle β. By changing the cone angles α and β, the axial angle θ between the two gears is changed, so that the second bevel gear (4) forms a platform with different angles. At the same time, replace the second fixing part (7) to ensure that the cone apexes of the two gears coincide at point A, and that the pitch cone surfaces of the two bevel gears are tangent at a point, forming a precise line contact, so that the tooth surfaces of the two gears mesh with each other. The method of replacing the second fixing part (7) here is the same as that described in Method 1.

[0049] Method 4: Rotate the first bevel gear (3), the second bevel gear (4), the second shaft (5), the first fixing member (6), the second fixing member (7), and the third fixing member (8) together around the first shaft (2), thereby changing the orientation of the second shaft (5) in space, so that the second bevel gear (4) forms a loading platform at different angles. Method 4 can be used in conjunction with methods 1-3, or it can be used alone.

[0050] Figure 4 This is a specific embodiment of replacing the second bevel gear (4) (corresponding to method 1 above). Using a similar principle, the shaft angle θ between the two gears can also be changed by replacing the first bevel gear (3) or by simultaneously replacing the first bevel gear (3) and the second bevel gear (4).

[0051] Figure 5This is a specific embodiment (corresponding to method 4 above) in which the first bevel gear (3), the second bevel gear (4), the second rotating shaft (5), the first fixing member (6), the second fixing member (7), and the third fixing member (8) are rotated as a whole around the first rotating shaft (2). In the figure, the relevant device is rotated 180°, thereby changing the spatial orientation of the rotating shaft (4). In actual use, the rotation angle can be set to any value between 0-360° as needed.

[0052] This invention discloses a non-magnetic testing device based on bevel gears, which can be used for applications such as testing the direction error of a magnetometer, the direction sensitivity of a magnetometer, and the magnetic characteristics of an object.

[0053] In the magnetometer direction error test, the magnetometer to be tested is mounted on the surface of the second bevel gear (4), and a stable magnetic field with a fixed direction is set in its vicinity. Then, the second bevel gear (4) is driven to rotate by the drive mechanism (1) to change the direction of the magnetometer to be tested, and the change of the magnetometer reading is recorded to obtain the magnetometer repair error.

[0054] In the process of testing the reading accuracy, reading linearity, and frequency response parameters of the magnetometer when it points to different directions, the magnetometer under test is mounted on the surface of the second bevel gear (4), and a stable magnetic field in a fixed direction is set nearby. During the test, the turntable is first fixed in the set direction, and then the magnetic field is set to different magnitudes and the magnetometer reading is measured to obtain the reading accuracy, reading linearity, and frequency response parameters of the magnetometer in the set direction. Then the turntable direction is changed and the relevant characteristics of the magnetometer in the new direction are measured.

[0055] In the test of the magnetic characteristics of an object, the object to be tested is mounted on the surface of the second bevel gear (4), and a background magnetic field is set nearby as required. A magnetometer for recording the magnetic signal of the object is placed nearby. Then, the second bevel gear (4) is driven to rotate by the drive mechanism (1) to change the direction of the object to be tested, and the change of the magnetometer reading is recorded, thereby obtaining the magnetic spatial distribution characteristics of the object.

[0056] In all the above tests, the test process can be repeated after changing the direction of the second rotating shaft (5) to obtain multiple sets of test results.

[0057] Example 1:

[0058] The first rotating shaft (2) drives the first bevel gear (3) to rotate. The first bevel gear (3) transmits the rotation to the second bevel gear (4). The second bevel gear (4) itself serves as a platform for carrying objects. Depending on the specific object being carried, it can be used to test the direction error of the magnetometer, the direction sensitivity of the magnetometer, and the magnetic characteristics of the object.

[0059] For example, after placing the first rotating shaft (2), the first bevel gear (3), and the second bevel gear (4) inside a multi-layer magnetic shielding cylinder (10) with axial openings, it can be used to measure key parameters such as the direction error, reading accuracy, reading linearity, and frequency response of a magnetometer pointing in different directions within the magnetic shielding cylinder. Figure 6 As shown, a magnetic field coil 12 is placed axially inside the magnetic shielding cylinder, and then a non-magnetic turntable is placed inside the magnetic field coil. The magnetometer 11 to be tested (i.e., the magnetic sensor) is placed on the non-magnetic turntable.

[0060] After closing the magnetic shielding cylinder cover, the magnetic field inside the magnetic shielding cylinder is set to a specific value through the magnetic field coil. Then, the turntable is rotated to measure the reading characteristics of the magnetometer when it points to a specific direction or during the change of direction of the magnetometer.

[0061] Due to limitations such as the structure of the shielding cylinder or the internal coil structure, magnetic shielding cylinders typically have only one or a few through holes in one direction to connect with the outside world. The non-magnetic turntable based on bevel gears of this invention allows the turntable to rotate in more directions, improving its flexibility of use.

[0062] Magnetic shielding cylinders are usually (semi) closed cylinders made of high magnetic permeability materials. In order to allow the inside of the magnetic shielding cylinder to communicate with the outside world (for wiring, etc.), there are usually some openings on it. However, because the openings will reduce the magnetic shielding performance, the size and number of openings are strictly limited. The common opening scheme is to open the openings along the central axis of the magnetic shielding cylinder.

[0063] like Figure 6 As shown, when testing parameters such as directional error, reading accuracy, reading linearity, and frequency response of a magnetometer pointing in different directions, it is necessary to generate a highly uniform magnetic field with spatial distribution within the magnetic shielding cylinder. The optimal solution in this case is to arrange coils along the axial direction of the magnetic shielding cylinder. To generate a sufficiently large and uniform magnetic field, the magnetic field coils often have no openings on their sides, only being open in the axial direction to allow communication with the outside world.

[0064] However, when testing parameters such as directional error, reading accuracy, reading linearity, and frequency response of the magnetometer when it points in different directions, it is usually necessary for the turntable to rotate in directions other than the axis of the magnetic shielding cylinder. A bevel gear can be used to change the rotation direction from the axial direction to the desired direction (in the prior art, the turntable rotates in a direction perpendicular to the axis of the magnetic shielding cylinder. According to the design of this invention, the turntable can rotate in a direction not perpendicular to the axis of the shielding cylinder). Furthermore, since the drive shaft 2 is on the axis of the magnetic shielding cylinder, if the function of the bevel gear 4 is merely to transmit rotation to a turntable coaxial with it, this transmission process will occupy more space, reducing the size of the turntable that can effectively support objects. However, by using the solution proposed in this invention, the surface of the bevel gear 4 is directly used as the platform of the turntable, maximizing the use of the narrow space inside the magnetic shielding cylinder.

[0065] When measuring directional error, the magnetic field coil is usually made to generate a fixed magnetic field value, and then the turntable is rotated to compare the readings of the magnetometer in different directions, so as to obtain the magnetometer reading error caused by the change of magnetometer direction, that is, the directional error or turning difference.

[0066] In testing parameters such as reading accuracy, reading linearity, and frequency response of a magnetometer when it is pointed in different directions, the turntable is usually fixed in a certain direction first. Then, the magnetic field is set to different magnitudes and the magnetometer readings are measured to obtain parameters such as reading accuracy, reading linearity, and frequency response of the magnetometer in that direction. Then, the turntable direction is changed and the relevant characteristics of the magnetometer in the new direction are measured.

[0067] Example 2:

[0068] A non-magnetic turntable used in magnetically shielded rooms. A magnetically shielded room is a room assembled from multiple layers of high-permeability materials, containing a magnetically shielded space. Due to the magnetic shielding effect of the external multiple layers of high-permeability materials, external magnetic fields are difficult to enter the internal space, thus creating a quiet magnetic field environment inside and eliminating interference from external magnetic field noise.

[0069] To facilitate communication and power supply for instruments inside the magnetically shielded room, openings are typically provided. However, to avoid significantly affecting the magnetic shielding effect, the openings are usually very small. Due to the large size of the magnetically shielded room (typically over 2 meters in height), for ease of use, the most usable openings are usually located on the side surface of the magnetically shielded room.

[0070] The solution of this invention can form a non-magnetic turntable inside the magnetic shielding room that can rotate in any direction, which facilitates the use of various experiments.

[0071] Any process or method described in the flowcharts of this invention or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, which can be implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device. The computer-readable medium can be any medium containing a program for storage, communication, propagation, or transmission for use by an execution system, apparatus, or device, including read-only memory, magnetic disks, or optical disks.

[0072] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, those skilled in the art can combine or combine the different embodiments or examples described in this specification and the features therein without causing contradiction.

[0073] While embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and alterations to the above embodiments within the scope of the present invention.

Claims

1. A non-magnetic testing device based on bevel gears, characterized in that, It includes a drive mechanism (1), a first rotating shaft (2), a first bevel gear (3), a second bevel gear (4), and a second rotating shaft (5). The first bevel gear (3) is fixedly connected to the first rotating shaft (2). The drive mechanism (1) drives the first rotating shaft (2) to drive the first bevel gear (3) to rotate. The first bevel gear (3) transmits the rotation to the second bevel gear (4), causing the second bevel gear (4) to rotate around the second rotating shaft (5). The second bevel gear (4) serves as a platform for carrying the object to be measured. By setting the meshing angle of the first bevel gear (3) and the second bevel gear (4), the object to be measured on the second shaft (5) can obtain a measurement angle in any direction in space when the direction of the first shaft (2) is fixed. The first rotating shaft (2) serves as a transmission shaft and is located on the central axis of the magnetic shielding cylinder. The first rotating shaft (2) is fixed by the first fixing member (6), and the second rotating shaft (5) is fixed by the second fixing member (7). Both the first fixing member (6) and the second fixing member (7) are fixed on the third fixing member (8). The methods for changing the angles of the second bevel gear (4) and the second rotating shaft (5) include: The first bevel gear (3), the second bevel gear (4), the second rotating shaft (5), the first fixing member (6), the second fixing member (7), and the third fixing member (8) are rotated as a whole around the first rotating shaft (2), thereby changing the orientation of the second rotating shaft (5) in space, so that the second bevel gear (4) forms a loading platform at different angles; A coil is arranged along the axial direction of the magnetic shielding cylinder to generate a uniform magnetic field. The first rotating shaft (2) is located on the axis of the magnetic shielding cylinder, so that the cone apex of the first bevel gear (3) and the second bevel gear (4) coincides. At the same time, the object to be measured is close to the cone apex, so that it is in a highly uniform magnetic field region.

2. The non-magnetic testing device based on bevel gears according to claim 1, characterized in that, The drive mechanism (1) is a motor, engine, or handwheel.

3. The non-magnetic testing device based on bevel gears according to claim 1, characterized in that, The first rotating shaft (2), the first bevel gear (3), the second bevel gear (4), and the second rotating shaft (5) are all placed in the magnetic shielding space (9).

4. The non-magnetic testing device based on bevel gears according to claim 1, characterized in that, The second rotating shaft (5) is fixed by the second fixing member (7) to ensure that the second rotating shaft (5) can rotate freely axially around the second fixing member (7), but cannot be displaced axially; the first rotating shaft (2) is fixed by the first fixing member (6) to ensure that the first rotating shaft (2) can rotate freely axially around the first fixing member (6), but cannot be displaced axially.

5. The non-magnetic testing device based on bevel gears according to claim 4, characterized in that, The first fixing member (6) and the second fixing member (7) are set in a set position so that the positions of the two are relatively fixed, and ensure that the apex of the first bevel gear (3) and the second bevel gear (4) coincide, and the pitch cone surfaces of the first bevel gear (3) and the second bevel gear (4) are tangent at a point to form a line contact, thereby making the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) mesh.

6. The non-magnetic testing device based on bevel gears according to claim 4, characterized in that, The third fixing member (8) has several mounting holes at different positions. These mounting holes are used to install the second fixing member (7). By adjusting the different installation positions of the second fixing member (7), different second bevel gears (4) can be adapted to ensure that the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) mesh with each other, and at the same time, the second bevel gear (4) forms a loading platform at different angles.

7. The non-magnetic testing device based on bevel gears according to claim 4, characterized in that, The third fixing member (8) is provided with a horizontal sliding groove, which is used to move the second fixing member (7) left and right. By adjusting the different fixing positions of the second fixing member (7), different second bevel gears (4) can be adapted to ensure that the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) mesh with each other, and at the same time make the second bevel gear (4) form a loading platform with different angles.

8. A non-magnetic testing method based on bevel gears, characterized in that, The non-magnetic testing method is implemented based on the non-magnetic testing device based on bevel gears as described in any one of claims 1-7.

9. The non-magnetic testing method based on bevel gears according to claim 8, characterized in that, The specific non-magnetic testing method is as follows: A magnetic field coil is placed along the axis in a magnetically shielded space, and a non-magnetic testing device is placed inside the magnetic field coil. The magnetometer to be tested or the object whose magnetism is to be tested is placed on the non-magnetic testing device. When measuring the direction error of a magnetometer, the magnetometer to be tested is placed on a non-magnetic testing device, so that the magnetic field coil generates a set magnetic field value. Then, the non-magnetic testing device is rotated, and the readings of the magnetometer in different directions are compared to obtain the magnetometer reading error caused by the change of magnetometer direction, that is, the direction error or turning difference. In the process of testing the reading accuracy, reading linearity, and frequency response parameters of a magnetometer pointing in different directions, the magnetometer under test is placed on a non-magnetic testing device. First, the non-magnetic testing device is fixed in the set direction. Then, the magnetic field is set to different magnitudes and the magnetometer readings are measured to obtain the reading accuracy, reading linearity, and frequency response parameters of the magnetometer in the set direction. Then, the direction of the non-magnetic testing device is changed, and the relevant characteristics of the magnetometer in the new direction are measured. In the magnetic characteristic test of an object, the object to be tested is mounted on a non-magnetic testing device. At the same time, a background magnetic field is set up in the vicinity as required, and a magnetometer that records the magnetic signal of the object is placed nearby. Then, the second bevel gear is driven to rotate by the drive mechanism to change the direction of the object to be tested, and the changes in the magnetometer reading are recorded, thereby obtaining the magnetic spatial distribution characteristics of the object. In all tests, the above test procedure was repeated by changing the direction of the second rotating axis to obtain multiple sets of test results.

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