Non-magnetic testing device and testing method based on bevel gear

Abstract

The invention discloses a bevel gear-based non-magnetic testing device and method, and the device comprises a driving mechanism, a first rotating shaft, a first bevel gear, a second bevel gear, and a second rotating shaft, the first bevel gear is fixedly connected with the first rotating shaft, the driving mechanism drives the first rotating shaft to drive the first bevel gear to rotate, the first bevel gear transmits the rotation to the second bevel gear, and the second bevel gear is connected with the second rotating shaft. Rotating the second bevel gear around the second rotating shaft; the second bevel gear serves as a carrying platform and is used for carrying an object to be measured, and by setting the tooth meshing angle of the first bevel gear and the second bevel gear, under the condition that the direction of the first rotating shaft is fixed, the object to be measured carried on the second rotating shaft obtains the measurement angle in any direction of the space. The bevel gear is used for carrying the to-be-measured object, the rotating shaft of the rotary table and the rotating shaft of the driving mechanism form any angle, the structure is compact, the use flexibility is improved, and the device is suitable for being used in a closed magnetic shielding space with a small number of openings.

Description

Technical Field

[0001] The invention relates to a non-magnetic testing device and a testing method, in particular to a non-magnetic testing device and a testing method based on bevel gears. Background Art

[0002] In applications such as magnetometer calibration testing and object magnetic property measurement, the orientation of the object to be tested needs to be changed, but at the same time, no additional magnetic field interference is desired. Therefore, a non-magnetic test device that can change the orientation of the object to be tested is required. At the same time, in order to reduce external magnetic field interference, the object to be tested often needs to be placed in a closed magnetic shielding space to shield the external magnetic field.

[0003] However, generally speaking, to rotate an object to be tested, a driving mechanism such as a motor or an engine is required to drive the object to rotate. During this process, the movement of magnetic components in the driving mechanism such as the motor or the engine will introduce interference from the magnetic field.

[0004] One solution is to transmit the rotation to the turntable carrying the object to be tested through a rotating shaft, so that the driving mechanism such as the driving motor or engine is far away from the turntable, thereby reducing the magnetic field interference of the driving mechanism on the turntable. However, in this setting, the rotating axis of the turntable is coaxial with the axis of the driving mechanism, which limits the flexibility of the turntable's use direction.

[0005] Especially when used in conjunction with a magnetic shielding space, in order to reduce the impact on the magnetic shielding performance during the design of the magnetic shielding space, only a small number of tiny openings are left on the magnetic shielding layer. Therefore, the transmission shaft can only transmit rotation to the magnetic shielding space through such openings, which imposes more restrictions on the direction of rotation.

[0006] Prior art 1: 202311253332.6, a magnetic field controllable angle controllable magnetic testing device and measurement method, such as Figure 1 As shown, a magnetic shielding tube cover and a magnetic shielding tube form a closed magnetic shielding space. The non-magnetic turntable drive rod is driven by the non-magnetic turntable driver, so that the magnetic turntable drive rod passes through the opening on the magnetic shielding tube and enters the magnetic shielding space, thereby driving the non-magnetic turntable stage to rotate.

[0007] In the prior art 1, the rotation direction of the non-magnetic turntable stage and the rotation direction of the non-magnetic turntable driver are coaxial. Since the number and position of the openings in the magnetic shielding space are usually limited, the rotation direction of the turntable is subject to more restrictions.

[0008] Prior art 2: 202110033602.7, a measuring device and a measuring method for extremely weak residual magnetic materials, such as Figure 2As shown, a motor and a transmission component are provided; the non-magnetic turntable is connected to the motor through the transmission component. Since the transmission component in this technology is a belt, the rotation axis direction of the non-magnetic turntable is still significantly limited. Summary of the invention

[0009] In view of the problems existing in the prior art, the purpose of the present invention is to provide a non-magnetic testing device based on bevel gears, which can make the rotating axis of the turntable and the rotating axis of the driving mechanism form any angle and has a compact structure. Another purpose of the present invention is to provide a testing method implemented by using the non-magnetic testing device.

[0010] To achieve the above-mentioned purpose, the present invention provides a non-magnetic testing device based on bevel gears, comprising 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 to 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), so that the second bevel gear (4) rotates around the second rotating shaft (5);

[0011] The second bevel gear (4) serves as a loading platform for carrying an object to be measured. By setting the tooth meshing angles 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 when the direction of the first rotating shaft (2) is fixed.

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

[0013] Furthermore, 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).

[0014] Furthermore, the second rotating shaft (5) is fixed by the second fixing member (7), ensuring that the second rotating shaft (5) can freely rotate 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), ensuring that the first rotating shaft (2) can freely rotate axially around the first fixing member (6), but cannot be displaced axially.

[0015] Furthermore, the first fixing member (6) and the second fixing member (7) are arranged at set positions so that the positions between the two are relatively fixed, and it is ensured that the vertices of the divided cones of the first bevel gear (3) and the second bevel gear (4) coincide with each other, and the divided cone surfaces of the first bevel gear (3) and the second bevel gear (4) are tangent at one point to form a line contact, so that the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) are meshed.

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

[0017] Furthermore, a plurality of mounting holes are provided at different positions on the third fixing member (8), and the mounting holes are used to mount the second fixing member (7). By adjusting different mounting 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) are meshed with each other, and at the same time, the second bevel gear (4) forms a loading platform with different angles.

[0018] Furthermore, the third fixing member (8) is provided with a sliding groove along the horizontal direction, and the sliding groove is used to move the second fixing member (7) left and right. By adjusting different fixing positions of the second fixing member (7), different second bevel gears (4) are adapted to ensure that the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) are meshed with each other, and at the same time, the second bevel gear (4) forms a loading platform with different angles.

[0019] The present invention also provides a non-magnetic testing method based on bevel gears, and the non-magnetic testing method is implemented based on the above-mentioned non-magnetic testing device.

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

[0021] A magnetic field coil is placed axially in the magnetic shielding space (9), a non-magnetic turntable is placed in the magnetic field coil, and a magnetometer to be tested or an object to be tested for magnetic properties is placed on the non-magnetic turntable;

[0022] When measuring the direction error of the magnetometer, the magnetometer to be tested is placed on a non-magnetic turntable, the magnetic field coil generates a set magnetic field value, and then the turntable is rotated to compare the readings of the magnetometer in different directions to obtain the magnetometer reading error caused by the change of the magnetometer direction, that is, the direction error or the steering difference;

[0023] 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 to be tested is placed on a non-magnetic turntable, the turntable is first fixed in the set direction, and then the magnetic field is set to different sizes and the magnetometer readings are measured to obtain the reading accuracy, reading linearity, and frequency response parameters of the magnetometer in the set direction, and then the turntable direction is changed to measure the relevant characteristics of the magnetometer in the new direction.

[0024] In the object magnetic characteristic test, the object to be tested is placed on a non-magnetic turntable, a background magnetic field is set nearby as required, and a magnetometer for recording the magnetic signal of the object is placed nearby. Then, the second bevel gear (4) is driven to rotate by a driving mechanism (1) to change the direction of the object to be tested, and the change in the magnetometer reading is recorded, thereby obtaining the magnetic spatial distribution characteristics of the object.

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

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

[0027] The present invention discloses a non-magnetic testing device based on bevel gear transmission and a testing method thereof. One of the bevel gears is used to carry an object to be tested, so that the rotating axis of the turntable and the rotating axis of the driving mechanism can form any angle. The device has a compact structure, which improves the flexibility of use and is suitable for use in a closed magnetic shielding space with only a small number of openings. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0031] Figure 4 It is a schematic diagram of the structure after replacing the second bevel gear with different taper angles β;

[0032] Figure 5 This is a schematic diagram of the structure after being rotated to form different angles;

[0033] Figure 6 This is a structural schematic diagram of Example 1. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The following combination Figure 3-Figure 6 The specific embodiments of the present invention are described in detail. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0038] The present invention discloses a non-magnetic testing device based on bevel gears, comprising 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 to 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), so that the second bevel gear (4) rotates around the second rotating shaft (5). The second bevel gear (4) itself serves as a loading platform and can carry an object to be tested.

[0039] The driving mechanism (1) can be a motor, an engine, a hand wheel, etc. The first rotating shaft (2), the first bevel gear (3), the second bevel gear (4), and the second rotating shaft (5) can be placed in a magnetic shielding space (9). The magnetic shielding space (9) is an option, not a must. By setting the tooth meshing angle of the first bevel gear (3) and the second bevel gear (4), the second rotating shaft (5) can be moved in any direction in space when the direction of the first rotating shaft (2) is fixed, thereby improving 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 one point to form a line contact, so that the tooth surfaces of the two gears mesh with each other. In order to introduce the method of changing the angle of the second rotating shaft (5), the method of fixing the gear shaft is 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 axial direction but cannot be displaced in the axial direction. In order to meet this requirement, there are many design methods. A specific example is that a hole is set on the first fixing member (6) and a bearing is placed in it. 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 axial direction; at the same time, a limiting device is added to the shaft to prevent the first rotating shaft (2) from being displaced in the axial direction.

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

[0043] When in use, the first fixing member (6) and the second fixing member (7) are arranged at appropriate positions so that the positions between them are relatively fixed, and the vertices of the divided cones of the first bevel gear (3) and the second bevel gear (4) are ensured to coincide with each other, and the divided cone surfaces of the two bevel gears are tangent to each other at one point to form a precise line contact, so that the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) are meshed. The specific method is to fix the first fixing member (6) and the second fixing member (7) on the same third fixing member (8), or to fix them on other objects respectively.

[0044] Methods for changing the angle between the second bevel gear (4) and the second rotating shaft (5) include the following four methods:

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

[0046] In order to facilitate the replacement of the second fixing member (7), there are a variety of different ways, such as providing mounting holes at different positions on the third fixing member (8), or providing a plurality of mounting holes along the third fixing member (8). Figure 3 The horizontal slide groove in the middle allows the second fixing member (7) to be replaced along the Figure 3The second fixing member (7) is moved left and right in the horizontal direction, and finally fixed at a predetermined position, so as to ensure that the vertices of the two gears' dividing cones coincide at point A, and the dividing cone surfaces of the two bevel gears are tangent at one 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), it can be fixed by screws, pressure plates, buckles, etc.

[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 angle θ between the two gears, so that the second bevel gear (4) forms a loading platform with different angles; at the same time, replace the second fixing member (7) with a suitable height and mounting shaft angle, ensure that the cone vertices of the two gears coincide at point A, and the dividing cone surfaces of the two bevel gears are tangent at one point to form a precise line contact, so that the tooth surfaces of the two gears mesh with each other. The method of replacing the second fixing member (7) here is the same as that described in method 1.

[0048] Method 3: Replace the first bevel gear (3) with different taper angles α and the second bevel gear (4) with different taper angles β at the same time, and change the taper angles α and β at the same time, thereby changing the shaft angle θ between the two gears, so that the second bevel gear (4) forms a loading platform with different angles; replace the second fixing member (7) at the same time, ensure that the taper vertices of the two gears coincide at point A, and the dividing cone surfaces of the two bevel gears are tangent at one point to form a precise line contact, so that the tooth surfaces of the two gears mesh with each other. The method of replacing the second fixing member (7) here is the same as that described in method 1.

[0049] Method 4: 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 with different angles. This method 4 can be used in combination with methods 1-3, or can be used alone.

[0050] Figure 4 This is a specific embodiment of replacing the second bevel gear (4) (corresponding to the above method 1). 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 replacing the first bevel gear (3) and the second bevel gear (4) at the same time.

[0051] Figure 5The invention is a specific embodiment (corresponding to the above method 4) of making 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) rotate 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 and 360° as needed.

[0052] The invention discloses a non-magnetic testing device based on bevel gears, which can be used for applications such as magnetometer directional error, magnetometer directional sensitivity and object magnetic characteristic testing.

[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 near the second bevel gear (4). The second bevel gear (4) is then driven to rotate by a driving mechanism (1), the direction of the magnetometer to be tested is changed, and the change in the magnetometer reading is recorded, thereby obtaining the magnetometer repair error.

[0054] In the process of testing the reading accuracy, reading linearity and frequency response parameters of the magnetometer when pointing to different directions, 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 near it. During the test, the turntable is first fixed in the set direction, and then the magnetic field is set to different sizes 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 object magnetic characteristic test, the object to be tested is placed on the surface of the second bevel gear (4), a background magnetic field is set nearby as required, and a magnetometer for recording the magnetic signal of the object is placed nearby. The second bevel gear (4) is then driven to rotate by the driving mechanism (1), the direction of the object to be tested is changed, and the change in the magnetometer reading is recorded, thereby obtaining the magnetic spatial distribution characteristics of the object.

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

[0057] Embodiment 1:

[0058] The first rotating shaft (2) drives the first bevel gear (3) to rotate, and the first bevel gear (3) transmits the rotation to the second bevel gear (4). The second bevel gear (4) itself serves as a loading platform and can carry an object to be tested. Depending on the specific object carried, the second bevel gear (4) 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 the first rotating shaft (2), the first bevel gear (3), and the second bevel gear (4) are placed in a multi-layer magnetic shielding tube (10) with an axial opening, the key parameters such as the directional error, reading accuracy, reading linearity, and frequency response of the magnetometer when it points to different directions can be measured in the magnetic shielding tube. Figure 6 As shown, a magnetic field coil 12 is placed axially in the magnetic shielding cylinder, and then a non-magnetic turntable is placed in the magnetic field coil, and the magnetometer 11 to be tested (that is, the magnetic sensor) is placed on the non-magnetic turntable.

[0060] After closing the magnetic shielding tube cover, the magnetic field in the magnetic shielding tube is set to a specific value through the magnetic field coil, and then the turntable is rotated to measure the reading characteristics of the magnetometer when the magnetometer points to a specific direction or when the direction of the magnetometer changes.

[0061] Due to the limitations of factors such as the shielding tube structure or the coil structure inside the shielding tube, there are usually only one or a few directions of through holes in the magnetic shielding tube that can communicate with the outside world. The use of the non-magnetic turntable based on bevel gears of the present invention can make the turntable rotate in more directions, thereby improving the flexibility of use.

[0062] The magnetic shielding tube is usually a (semi) closed cylinder made of high magnetic permeability material. In order to connect the inside of the magnetic shielding tube 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 the openings are strictly limited. The common opening scheme is to open holes along the central axis of the magnetic shielding tube.

[0063] like Figure 6 As shown in the figure, in the process of testing the directional error, reading accuracy, reading linearity, frequency response and other parameters of the magnetometer when pointing in different directions, it is necessary to generate a magnetic field with high uniformity in spatial distribution in the magnetic shielding tube. At this time, the best solution is to arrange the coil along the axial direction of the magnetic shielding tube. In order to generate a sufficiently large uniform magnetic field, the magnetic field coil often has no openings on the side, and only the axial direction is open to connect with the outside world.

[0064] However, in the process of testing parameters such as directional error, reading accuracy, reading linearity, frequency response, etc. when the magnetometer points to different directions, it is usually required that the turntable can rotate around directions other than the axial direction of the magnetic shielding tube. Bevel gears can be used to convert the rotation direction from the axial direction to the required direction (the turntable in the prior art rotates around the axial direction perpendicular to the magnetic shielding tube. According to the design of the present invention, the turntable can rotate around a direction that is not perpendicular to the axial direction of the shielding tube). In addition, since the transmission shaft 2 is on the axis of the magnetic shielding tube, if the function of the bevel gear 4 is only to transmit the rotation to a turntable coaxial with it, then the transmission process will take up more space, squeezing the size of the turntable that can effectively carry objects. By adopting the solution proposed in the present invention, the surface of the bevel gear 4 is directly used as the loading platform of the turntable, which can maximize the use of the narrow space in the magnetic shielding tube.

[0065] When measuring the direction 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 the magnetometer direction, that is, the direction error or steering difference.

[0066] In the process of testing the reading accuracy, reading linearity, frequency response and other parameters of the magnetometer when it points to different directions, the turntable is usually fixed in a certain direction first, and then the magnetic field is set to different sizes and the magnetometer reading is measured to obtain the reading accuracy, reading linearity, frequency response and other parameters 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] Embodiment 2:

[0068] Non-magnetic turntable used in magnetic shielding room. Magnetic shielding room is a room composed of multiple layers of high magnetic permeability materials and containing magnetic shielding space. Due to the magnetic shielding effect of multiple layers of high magnetic permeability materials on the outside, it is difficult for the external magnetic field to enter the internal space, thus forming a quiet magnetic field environment inside, eliminating the interference of external magnetic field noise.

[0069] In order to facilitate the communication and power supply of the instruments inside the magnetic shielding room, some openings are usually set on the magnetic shielding room, but in order to avoid the obvious influence of the openings on the magnetic shielding effect, the aperture of the openings is usually very narrow. Due to the huge volume of the magnetic shielding room (usually more than 2 meters in height), for the convenience of use, the openings that can be effectively used are usually opened on the side surface of the magnetic shielding room.

[0070] By adopting the solution of the present invention, a non-magnetic turntable which can rotate in any direction can be formed inside the magnetic shielding room, which is convenient for use in various experiments.

[0071] Any process or method described in the flowchart of the present invention or in other ways herein can be understood as a module, fragment or part of a code including one or more executable instructions for implementing the steps of a specific logical function or process, which can be implemented in any computer-readable medium for use by an instruction execution system, device or equipment, and the computer-readable medium can be any medium containing storage, communication, propagation or transmission programs for use by execution systems, devices or equipment, including read-only memories, magnetic disks or optical disks, etc.

[0072] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, those skilled in the art can combine or combine different embodiments or examples described in this specification and the features therein without causing any contradiction.

[0073] Although the above content has shown and described the embodiments of the present invention, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace, modify and other update operations on the above embodiments within the scope of the present invention.

Claims

1. A non-magnetic testing device based on bevel gears, characterized in that: The invention 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 to 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), so that the second bevel gear (4) rotates around the second rotating shaft (5); The second bevel gear (4) serves as a loading platform for carrying an object to be measured. By setting the tooth meshing angles 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 when the direction of the first rotating shaft (2) is fixed.

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

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 a second fixing member (7), ensuring that the second rotating shaft (5) can freely rotate axially around the second fixing member (7), but cannot be displaced in the axial direction; the first rotating shaft (2) is fixed by a first fixing member (6), ensuring that the first rotating shaft (2) can freely rotate axially around the first fixing member (6), but cannot be displaced in the axial direction.

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 arranged at set positions so that the positions between the two are relatively fixed, and the vertices of the first bevel gear (3) and the second bevel gear (4) are ensured to coincide with each other, and the dividing cone surfaces of the first bevel gear (3) and the second bevel gear (4) are tangent to each other at one point to form a line contact, so that the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) are meshed.

6. 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 both fixed on the third fixing member (8).

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

8. The non-magnetic testing device based on bevel gears according to claim 6, characterized in that: The third fixing member (8) is provided with a sliding groove along the horizontal direction, and the sliding groove is used to move the second fixing member (7) left and right. By adjusting different fixing positions of the second fixing member (7), different second bevel gears (4) are adapted to ensure that the tooth surfaces of the first bevel gear (3) and the second bevel gear (4) are meshed with each other, and at the same time, the second bevel gear (4) forms a loading platform with different angles.

9. 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 1-10.

10. The non-magnetic testing method based on bevel gears according to claim 9, characterized in that: The non-magnetic test method is specifically as follows: A magnetic field coil is placed axially in the magnetic shielding space, a non-magnetic turntable is placed in the magnetic field coil, and a magnetometer to be tested or an object to be tested with magnetic properties is placed on the non-magnetic turntable; When measuring the direction error of the magnetometer, the magnetometer to be tested is placed on a non-magnetic turntable, the magnetic field coil generates a set magnetic field value, and then the turntable is rotated to compare the readings of the magnetometer in different directions to obtain the magnetometer reading error caused by the change of the magnetometer direction, that is, the direction error or the steering difference; 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 to be tested is placed on a non-magnetic turntable, the turntable is first fixed in a set direction, and then the magnetic field is set to different sizes and the magnetometer reading is measured to obtain the reading accuracy, reading linearity, and frequency response parameters of the magnetometer in the set direction, and then the turntable direction is changed to measure the relevant characteristics of the magnetometer in the new direction; In the object magnetic characteristic test, the object to be tested is placed on a non-magnetic turntable, and a background magnetic field is set nearby as required. A magnetometer for recording the magnetic signal of the object is placed nearby, and then the second bevel gear is driven to rotate by the driving mechanism to change the direction of the object to be tested, and the change in the magnetometer reading is recorded, so as to obtain the magnetic spatial distribution characteristics of the object; In all tests, the above test process is repeated after changing the direction of the second rotating shaft to obtain multiple groups of test results.

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