A center of gravity measuring device and method

Abstract

The embodiment of the application provides a gravity center measuring device and method, relates to the technical field of measuring equipment, and the device comprises a measuring column, a level, wherein the level is in a horizontal state, and a placing plane is also in a horizontal state; a scale bar is arranged on the first edge of the two sides of the measuring column, and the center of the first edge is the zero point in the scale bar; the measuring column is used for carrying a to-be-measured object through the placing plane in the case that the placing plane is in the horizontal state, wherein the placing plane sequentially contacts three sides of the to-be-measured object; for each side contacted, the measuring column carries the to-be-measured object and is in the horizontal state again, and the target plane perpendicular to the placing plane is determined based on the zero point; the section of the to-be-measured object through which the target plane passes is obtained; the intersection points of the sections sequentially contacting the three sides of the to-be-measured object are determined, and the intersection points are determined as the gravity center of the to-be-measured object. The above scheme can simplify the gravity center measuring process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring equipment, in particular to a gravity center measuring device and method. BACKGROUND

[0002] When a camera is carried by a gimbal of a UAV to take pictures in the air, in order to ensure the gimbal to rotate normally, the weight of the camera needs to meet the load requirement of the gimbal, and when the weight of the camera reaches the load limit of the gimbal, the gravity center of the camera must be on the rotation axis of the gimbal to avoid the gravity center deviating from the rotation axis, which causes the motor to fail to rotate the camera.

[0003] Therefore, the gravity center of the camera needs to be determined. However, the camera contains parts made of different materials, and the gravity center is not directly located at the geometric center of the camera, so it is difficult to measure. In the prior art, a rope hanging method is used to measure the position of the plumb line relative to the measured object each time the camera is hung as a measured object, and then the equation of the plumb line relative to the measured object is obtained, and the intersection of multiple plumb line equations is solved.

[0004] This method requires that the measured object must have a place where the rope can be hung, and the rope hanging method needs to spend a lot of time, repeatedly test multiple times, and use multiple devices to determine the gravity center position, so the measurement process is relatively complex. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a gravity center measuring device and method to simplify the gravity center measuring process. The specific technical solutions are as follows:

[0006] In a first aspect of the embodiments of the present application, a gravity center measuring device is provided, which includes a measuring column and a level, the measuring column includes a placing plane, an arc-shaped support surface opposite to the placing plane, and two side surfaces adjacent to the placing plane and the arc-shaped support surface and opposite to each other; wherein,

[0007] The placing plane is used to place a measured object,

[0008] The arc-shaped support surface is used as a support surface to support the entire measuring column,

[0009] The level is installed on one of the two side surfaces of the measuring column, and is used to detect the horizontal state of the placing plane when the measuring column is placed;

[0010] A scale bar is provided on a first edge of the two side surfaces of the measuring column; wherein, the arc-shaped support surface of the measuring column is in contact with the placing plane when the measuring column is placed; the first edge is an edge where the side surface meets the placing plane of the measuring column;

[0011] The measuring column is used to carry the object to be measured through the placement plane when the placement plane is in a horizontal state, wherein the placement plane is in contact with three different axial sides of the object to be measured in turn; for each side in contact, the measuring column carries the object to be measured and is in the horizontal state again, and the target plane perpendicular to the placement plane is determined based on the scale bar; the section of the object to be measured passed by the target plane is obtained; the intersection of the sections obtained by the three sides of the object to be measured in contact in turn is determined, and the intersection is determined as the center of gravity of the object to be measured.

[0012] According to the foregoing embodiment of the first aspect of the present application, the device further comprises a counterweight;

[0013] The counterweight is in sliding connection with a sliding groove arranged on one side of the measuring column, and is used to make the level detect that the placement plane is in a horizontal state by sliding on the sliding groove.

[0014] According to any one of the foregoing embodiments of the first aspect of the present application, the scale bars on the two sides of the measuring column are symmetrically arranged about the middle section between the two sides of the measuring column.

[0015] According to any one of the foregoing embodiments of the first aspect of the present application, the center of the first edge is the zero point of the scale bar.

[0016] According to any one of the foregoing embodiments of the first aspect of the present application, obtaining the section of the object to be measured passed by the target plane comprises:

[0017] Recording the scale value on the scale bar corresponding to the edge of the reference side of the object to be measured when the target plane is obtained;

[0018] Based on the scale value, the section of the object to be measured passed by the target plane is calculated on the corresponding side in the three-dimensional model of the object to be measured.

[0019] In the second aspect of the present application, a center of gravity measuring method is provided, which is applied to the center of gravity measuring device as described above, and the method comprises the steps of:

[0020] S1, placing the center of gravity measuring device on a certain plane, and adjusting the center of gravity measuring device so that the level shows that the placement plane is in a horizontal state;

[0021] S2, placing the object to be measured on the placement plane, adjusting the position of the object to be measured so that the level shows that the placement plane is in a horizontal state, and determining the target plane perpendicular to the placement plane according to the scale bar; obtaining the section of the object to be measured passed by the target plane;

[0022] S3, making the sides of the object to be measured in different axial directions contact the placement plane, and repeating the above step S2;

[0023] S4, determining the intersection of each section obtained by sequentially contacting three different axial sides of the object to be measured with the center of gravity measurement device, and determining the intersection as the center of gravity of the object to be measured.

[0024] According to the foregoing embodiment of the second aspect of the present application, adjusting the center of gravity measurement device to make the level display that the placement plane is in a horizontal state comprises

[0025] Adjusting the position of the counterweight arranged on one side of the measuring column to make the level display that the placement plane is in a horizontal state, wherein the counterweight is in sliding connection with the sliding groove arranged on one side of the measuring column.

[0026] According to any one of the foregoing embodiments of the second aspect of the present application, determining the target plane perpendicular to the placement plane according to the scale bar comprises

[0027] Determining the target plane perpendicular to the placement plane according to the zero position of the scale bar, wherein the zero position of the scale bar is the center point of the first edge of the two sides of the measuring column in the center of gravity measurement device, and the first edge is the edge of the side of the measuring column adjacent to the placement plane of the measuring column.

[0028] According to any one of the foregoing embodiments of the second aspect of the present application, obtaining the section of the object to be measured through which the target plane passes comprises

[0029] Recording the scale value on the scale bar corresponding to the edge of the reference side of the object to be measured in the case of obtaining the target plane;

[0030] Based on the scale value, calculating the section of the object to be measured through which the target plane passes on the corresponding side in the three-dimensional model of the object to be measured.

[0031] According to any one of the foregoing embodiments of the second aspect of the present application, the reference side is the side of the object to be measured which is perpendicular to the placement plane and the side of the measuring column when the object to be measured is placed on the placement plane and the placement plane is in a horizontal state.

[0032] Beneficial effects:

[0033] As can be seen from the above, the scheme provided in the embodiments of the present application for measuring the center of gravity only needs to exchange the sides of the semi-elliptical body in the center of gravity measurement device when placing the object to be measured, so that the section through which the center of gravity is located at different angles can be obtained, thereby determining the center of gravity, without the need for additional work such as ropes and operation procedures, and the operation is simple, which simplifies the center of gravity measurement process. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description.

[0035] Figure 1A structural schematic diagram of a first center of gravity measuring device provided by an embodiment of the present application.

[0036] Figure 2 A structural schematic diagram of a second center of gravity measuring device provided by an embodiment of the present application.

[0037] Figure 3 A structural schematic diagram of a third center of gravity measuring device provided by an embodiment of the present application.

[0038] Figure 4 A structural schematic diagram of a fourth center of gravity measuring device provided by an embodiment of the present application.

[0039] Figure 5 A flowchart of a first center of gravity measuring method provided by an embodiment of the present application.

[0040] Figure 6 A flowchart of a second center of gravity measuring method provided by an embodiment of the present application.

[0041] Figure 7 A schematic diagram of a center of gravity measuring device determining a target plane and a section provided by an embodiment of the present application.

[0042] Figure 8 A schematic diagram of a center of gravity measuring device determining a target plane and a section provided by an embodiment of the present application.

[0043] Figure 9 A schematic diagram of a center of gravity measuring device determining a target plane and a section provided by an embodiment of the present application.

[0044] Figure 10 A schematic diagram of a center of gravity measuring device determining three sections provided by an embodiment of the present application. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0046] It should be noted that the embodiments of the present application are not limited to the objects to be measured, and other conventional devices, such as automobile parts, can be used as the objects to be measured in the following description to determine the center of gravity.

[0047] Referring to Figure 1In one embodiment of the present application, a center of gravity measuring device is provided, which comprises a measuring column and a level; the measuring column comprises a placing plane, an arc-shaped supporting surface and two side surfaces, the arc-shaped supporting surface is used to support the whole measuring column, when the measuring column is placed, the arc-shaped supporting surface is at the bottom and the placing plane is at the top, the placing plane is used to carry the object to be measured, the placing plane is a flat surface and can keep horizontal state when the measuring object is placed, the two side surfaces are respectively located at two sides of the whole measuring column; wherein,

[0048] The level is embedded in the groove of one side surface of the measuring column, so that when the level detects the horizontal state, the placing plane is also in the horizontal state; of course, the level can also be installed on the side surface of the measuring column by other ways, for example, it can be installed on the side surface of the measuring column by pasting or clamping;

[0049] The first edge of the two side surfaces of the measuring column is provided with a scale bar, and the center of the first edge is the zero point of the scale bar; wherein, when the measuring column is placed, the arc-shaped supporting surface of the measuring column is in contact with the placed plane; the first edge is the edge of the side surface of the measuring column which is in contact with the placing plane of the measuring column; of course, the zero point of the scale bar can also be located at other positions, for example, the zero point is located at the end of the scale bar; in the embodiment of the present application, the zero point of the scale bar is located at the center of the first edge as the preferred embodiment, and the zero point of the scale bar has scales on both sides, so that the scale data can be read quickly when reading the scale value on the scale bar corresponding to the edge of the reference side surface of the object to be measured in the subsequent step;

[0050] The measuring column is used to carry the object to be measured on the placing plane in the horizontal state, wherein the three different axial side surfaces of the object to be measured are sequentially in contact with the placing plane and placed on the placing plane; for each side surface in contact, when the measuring column carries the object to be measured and is in the horizontal state again, the target plane perpendicular to the placing plane is determined based on the zero point of the scale bar; the section of the object to be measured passed by the target plane is obtained; the intersection points of the sections obtained by the three side surfaces of the object to be measured in contact are determined, and the intersection points are determined as the center of gravity of the object to be measured.

[0051] When the zero point of the scale bar is not located at the center position of the first edge, a target plane passing through the center positions of the two first edges and being perpendicular to the placement plane can be found based on the relative position relationship between the zero point and the center position of the first edge; when the zero point of the scale bar is located at the center position of the first edge, a target plane passing through the zero point positions of the two scale bars and being perpendicular to the placement plane can be quickly found based on the zero point position; the center of gravity of the object to be measured is located on the target plane. Preferably, the scale bars on the two side surfaces of the measuring column are symmetrically arranged about a middle cutting surface between the two side surfaces of the measuring column, and the middle cutting surface is a surface located between the two side surfaces of the measuring column and parallel to the two side surfaces, so that the scale value data can be conveniently read.

[0052] The arc-shaped supporting surface of the measuring column can have any curvature, for example, the arc-shaped supporting surface of the measuring column can be half of an ellipse, that is, the arc-shaped supporting surface is a semi-elliptical cylindrical body; preferably, the arc-shaped supporting surface of the measuring column is half of a circle, that is, the arc-shaped supporting surface is a semi-cylindrical body with a semicircular surface. Figure 1 As shown in ordinal number 1, it is a measuring column, and in this embodiment, the measuring column is preferably a semi-cylindrical body. The placement plane of the measuring column is a plane on which the object to be measured 4 is placed, and the arc-shaped supporting surface is located below the placement plane.

[0053] The surface on which the counterweight 2 and the level 3 are located is one side surface of the measuring column 1, and the other side surface is the back surface of the side surface shown in the figure. As shown in Figure 1 , a scale bar 11 is drawn on the side surface, and the longest scale bar is in the center, that is, the zero point. Each of the two side surfaces has a zero point at the joint with the placement plane.

[0054] The edge on which the scale bar is located is the first edge.

[0055] The above-mentioned counterweight 2 can also not be arranged on the same side surface as the level, and the mounting mode of the counterweight 2 only needs to meet the condition that the counterweight 2 can slide on the side surface of the measuring column 1, so as to adjust the center of gravity of the entire measuring column 1, so that the placement plane is in a horizontal state when the measuring column 1 is placed. In some embodiments, a sliding groove can be arranged on the side surface of the measuring column 1, and the counterweight is mounted in the sliding groove and in sliding cooperation with the sliding groove; the sliding groove extends along the direction of the first edge, so that the sliding block can move along the direction of the first edge to adjust the center of gravity of the entire measuring column 1.

[0056] The level can be selected from any type, for example, a digital display level. The level is shown in Figure 1 ordinal number 3. The level can be embedded in a groove, and the groove is shown in Figure 2 ordinal number 13, Figure 2 is a structural schematic view of the measuring column without other components.

[0057] The scale bar can be printed by laser in advance or made by carving tools, and the embodiments of the present application do not make any limitation in this aspect.

[0058] The placing planes are in contact with the three sides of the object to be measured in turn, and the three sides of the object to be measured are three sides in different axial directions, as shown in Figure 1 、 Figure 3 、 Figure 4 the placing mode of the object to be measured 4 in the middle, the object to be measured 4 is rotated around the Z axis and the Y axis respectively based on the Figure 1 , and the object to be measured 4 is rotated around the X axis and other ways to make the new side of the object to be measured in contact with the placing plane, and the embodiments of the present application do not make any limitation in this aspect. Figure 3 、 Figure 4 ; in addition, the object to be measured is rotated around the X axis and other ways to make the new side of the object to be measured in contact with the placing plane, and the embodiments of the present application do not make any limitation in this aspect.

[0059] For each side in contact with the placing plane of the measuring cylinder 1, the object to be measured 4 is moved so that the level of the measuring cylinder and the placing plane are restored to be horizontal again, at this time, the plane in which the two zero lines are located and which is perpendicular to the placing plane is the target plane, and the tangent plane generated by the object to be measured is the tangent plane in which the center of gravity is located.

[0060] Three sides are used to obtain three non-parallel tangent planes in three directions of the object to be measured, and the intersection point of the tangent planes obtained by the three sides in contact with the object to be measured in turn is determined, that is, the three tangent planes share a point, and the point is the center of gravity.

[0061] After the object to be measured is rotated by 90° around the Y axis and the Z axis, it is placed on the placing plane above the semi-circular cylinder, as shown in Figure 3 、 4 respectively, and the above steps are repeated. When the reading device is horizontal, the distance between the edge of the object to be measured (the reference side) and the 0 point of the scale is read, and the second and third tangent planes in which the center of gravity of the object to be measured 4 is located can be obtained.

[0062] As can be seen from the above, the scheme provided by the embodiments of the present application for measuring the center of gravity only needs to exchange the sides of the semi-elliptical main body of the center of gravity measuring device in contact with the object to be measured when placing the object to be measured, so that the tangent planes in which the center of gravity is located under different angles can be obtained, and thus the center of gravity can be determined, without the need for additional work such as ropes and operation procedures, and the operation is simple, and the center of gravity measurement process is simplified.

[0063] In an embodiment of the present application, the device further comprises a counterweight 2.

[0064] As described above, the counterweight 2 is slidably connected with the sliding groove arranged on one side of the measuring cylinder 1, and is used to make the leveler be in a horizontal state by sliding on the sliding groove.

[0065] Please refer to Figure 2The structure indicated by the number 12 in the figure is a sliding groove in which the counterweight 2 is located. The counterweight 2 can be a metal block with a certain mass, or a block of other materials, which has a shape consistent with the recess of the sliding groove 12.

[0066] The measuring column 1 needs to be placed on a contact surface, such as a table or the ground. Generally, it is difficult to ensure that the contact surface is absolutely horizontal, and accordingly it is difficult to make the level meter directly in a horizontal state. By adjusting the center of gravity of the measuring column through the counterweight, the level meter can be adjusted to a horizontal state on various types of contact surfaces, and the process of center of gravity measurement can be carried out, thereby improving the applicability of the scheme.

[0067] In an embodiment of the present application, the section of the object to be measured through the target plane can be obtained according to the following implementation.

[0068] In the case of recording the target plane, the scale value on the scale bar corresponding to the edge of the reference side surface of the object to be measured; based on the scale value, the section of the object to be measured through the target plane is calculated on the corresponding reference side surface in the three-dimensional model of the object to be measured.

[0069] The three-dimensional model can be obtained based on existing software, such as using CAD (Computer Aided Design) software. The three-dimensional model can be provided with the same size and shape of the object to be measured. In this way, the scale value can be directly read according to the scale bar under the condition of stable plane, and the same scale value is used to determine the target plane in the three-dimensional model. As shown in Figure 1 The left and right scales of the object to be measured 4 are determined, and the positions of the corresponding zero points can be found on the corresponding side surfaces in the three-dimensional model according to the left and right scales, and then a vertical plane can be made on the corresponding side surface to obtain the corresponding section in the three-dimensional model.

[0070] In this way, each section can be intuitively indicated by the three-dimensional model, and the intersection point of each section can be obtained as the center of gravity.

[0071] In addition, the above measurement process can be repeated multiple times to obtain the sections of the object to be measured corresponding to three side surfaces in each measurement process, and for each section obtained from each side surface, the sections measured on the measurement column in multiple measurement processes can be averaged to determine the section used to calculate the center of gravity.

[0072] Alternatively, multiple centers of gravity can also be obtained by repeating the above measurement process, and the multiple centers of gravity obtained can be averaged to finally determine the center of gravity of the object to be measured.

[0073] Corresponding to the above method embodiment, an embodiment of the present application also provides a center of gravity measurement method, which is described with reference to Figure 5 .

[0074] As Figure 5 In one embodiment of the present application, a flowchart of a center of gravity measurement method is provided, which is applied to a center of gravity measurement device with a semi-elliptical main body. The method comprises steps S1-S4.

[0075] S1, place the center of gravity measurement device on a plane, and adjust the center of gravity measurement device so that the level shows that the placement plane is in a horizontal state. The level can detect whether it is horizontal. By designing the measurement column of the measurement device, when the level installed on the measurement column detects that the entire measurement column is in a horizontal state, the placement plane of the measurement column is in a horizontal state.

[0076] In some embodiments, the above purpose can be achieved by setting a counterweight on the measurement column. The counterweight is in sliding connection with a sliding groove arranged on one side of the measurement column. The position of the counterweight is adjusted so that the level shows that the placement plane is in a horizontal state.

[0077] S2, place the object to be measured on the placement plane, adjust the position of the object to be measured so that the level shows that the placement plane is in a horizontal state, and determine the target plane perpendicular to the placement plane according to the scale bar; obtain the tangent plane of the target plane passing through the object to be measured.

[0078] After the object to be measured is placed on the placement plane, the center of gravity of the measurement column 1 may be destroyed, so that the level no longer measures the horizontal state. At this time, the position of the object to be measured on the placement plane is adjusted so that the level returns to the horizontal state. In this state, the target plane perpendicular to the placement plane can be determined according to the scale bar, and the center of gravity of the object to be measured is located on the target plane.

[0079] In some embodiments, determining the target plane perpendicular to the placement plane according to the scale bar comprises:

[0080] Determining the target plane perpendicular to the placement plane according to the zero point position of the scale bar, wherein the zero point position of the scale bar is the center point of the first edge of the two sides of the measurement column in the center of gravity measurement device, and the first edge is the edge adjacent to the placement plane of the measurement column. By setting the zero point position of the scale bar at the center of the first edge, the coordinate position of the reference side of the object to be measured can be easily read.

[0081] In some embodiments, obtaining the tangent plane of the target plane passing through the object to be measured comprises:

[0082] Recording the scale value on the scale bar corresponding to the edge of the reference side of the object to be measured in the case of obtaining the target plane; the reference side is the side of the object to be measured which is perpendicular to the placement plane and the side of the measurement column when the object to be measured is placed on the placement plane and the placement plane is in a horizontal state, as shown in Figures 7 to 9 .

[0083] Based on the scale value, the corresponding side surface of the three-dimensional model of the object to be measured is calculated to obtain the cut surface of the object to be measured through which the target plane passes, as shown in Figure 10 . In this way, each cut surface can be intuitively indicated by the three-dimensional model, and the intersection point of each cut surface is obtained as the center of gravity.

[0084] S3, the side surface of the object to be measured in different axial directions is in contact with the placement plane, and the above step S2 is repeated.

[0085] S4, the intersection point of each cut surface obtained by sequentially contacting the side surfaces of the object to be measured in three different axial directions is determined as the center of gravity of the object to be measured.

[0086] The specific measurement method steps are shown in Figure 6 , and the device embodiment shown in Figure 1 is adopted. In the case where the center of gravity of the object cannot be determined, the center of gravity measuring device is built, and the horizontal level is kept, so that the placement plane of the measuring column is kept horizontal.

[0087] The object is placed on the measuring device and continuously adjusted until the horizontal level is horizontal. At this time, the placement plane of the measuring column is restored to the horizontal state.

[0088] The plane perpendicular to the upper surface of the semicircular column through the 0 scale line is the plane where the center of gravity is located, and the average value is obtained by multiple measurements. The 0 scale line is the scale line where the zero point is located, and the upper surface is shown in Figure 1 , that is, the placement plane. Take the line connecting the two zero points, and obtain the plane perpendicular to the upper surface of the semicircular column where the line is located, and the cut surface of the object to be measured is the cut surface where the center of gravity is located.

[0089] The steps of rotating the object to be measured around the z and x axes are described in the foregoing embodiment, and will not be described here, that is, multiple measurements are taken to obtain multiple directional cut surfaces.

[0090] The three planes intersect at a point, that is, the center of gravity is determined, and is marked in the 3D numerical model.

[0091] In the embodiments described above, all or some of the steps can be implemented by hardware, software, firmware or any combination thereof. When implemented in software, all or some of the steps can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed by a computer, the computer program instructions cause the computer to perform all or some of the steps in accordance with the embodiments of the present application. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatuses. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, from a website, a computer, a server or a data center to another website, computer, server or data center through a wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. containing one or more available media. The available media can be a magnetic medium (for example, floppy disk, hard disk, magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, Solid State Disk (SSD)), etc.

[0092] It should be noted that the relative terms such as first and second, etc. are used herein only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0093] Each of the embodiments in the specification is described in a related manner, and the same or similar parts between each of the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. In particular, for the method embodiments, since they are basically similar to the device embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiments.

[0094] The above are only preferred embodiments of the present application, and are not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A center of gravity measuring device, characterized in that, The device includes a measuring column and a level. The measuring column includes a placement plane, an arc-shaped support surface opposite to the placement plane, and two side surfaces adjacent to and opposite to the placement plane and the arc-shaped support surface. The placement plane is used to place the object to be tested. The arc-shaped support surface serves as the support surface for the entire measuring column. The level is mounted on one of the two sides of the measuring column and is used to detect the horizontal state of the placement plane when the measuring column is placed. The measuring column has scale strips on the first edges of its two sides; wherein, when the measuring column is placed, the arc-shaped support surface of the measuring column is in contact with the plane on which it is placed; the first edge is the edge on the side that connects with the plane on which the measuring column is placed; The measuring column is used to support the object to be tested on the placement plane when the placement plane is in a horizontal state, wherein the placement plane sequentially contacts three different axial sides of the object to be tested; for each contacted side, when the measuring column supports the object to be tested and is in a horizontal state again, a target plane perpendicular to the placement plane is determined based on the scale bar; the cross-section of the object to be tested through which the target plane passes is obtained; the intersection point of each cross-section obtained by sequentially contacting the three sides of the object to be tested is determined, and the obtained intersection point is determined as the center of gravity of the object to be tested.

2. The apparatus according to claim 1, characterized in that, The device also includes a counterweight; The counterweight is slidably connected to a groove on one side of the measuring column, so that the level can detect that the placement plane is horizontal by sliding on the groove.

3. The apparatus according to claim 2, characterized in that, The scale bars on the two sides of the measuring column are symmetrically arranged about the mid-section between the two sides of the measuring column.

4. The apparatus according to claim 3, characterized in that, The center of the first edge is the zero point of the scale bar.

5. The apparatus according to claim 4, characterized in that, The process of obtaining the cross section of the object under test through which the target plane passes includes: Record the scale value on the scale bar corresponding to the edge of the reference side surface of the object under test when the target plane is obtained; Based on the scale value, the cross section of the object being tested through which the target plane passes is calculated on the corresponding side surface in the three-dimensional model of the object being tested.

6. A method for measuring center of gravity, characterized in that, Applied to the center of gravity measuring device according to any one of claims 1 to 5, the method includes the steps of: S1. Place the center of gravity measuring device on a plane and adjust the center of gravity measuring device so that the level shows that the placement plane is horizontal. S2. Place the object to be tested on the placement plane, adjust the position of the object to be tested so that the level shows that the placement plane is horizontal, and determine the target plane perpendicular to the placement plane according to the scale bar; Obtain the cross section of the target plane through the object under test; S3. Make the sides of the object to be tested in different axes contact the placement plane, and repeat step S2 above. S4. Determine the intersection point of each cross-section obtained by sequentially contacting the three sides of the object under test along three different axes, and determine the intersection point as the center of gravity of the object under test.

7. The method according to claim 6, characterized in that, The adjustment of the center of gravity measuring device, so that the level indicates the placement plane is horizontal, includes... Adjust the position of the counterweight block arranged on one side of the measuring column so that the level shows the placement plane is horizontal, wherein the counterweight block is slidably connected to the sliding groove arranged on one side of the measuring column.

8. The method according to claim 7, characterized in that, The step of determining the target plane perpendicular to the placement plane based on the scale bar includes... The target plane perpendicular to the placement plane is determined based on the zero point position of the scale bar, wherein the zero point position of the scale bar is the center point of the first edge of the two sides of the measuring column in the center of gravity measuring device, and the first edge is the edge of the side of the measuring column adjacent to the placement plane of the measuring column.

9. The method according to claim 8, characterized in that, The process of obtaining the cross section of the target plane through the object under test includes... Record the scale value on the scale bar corresponding to the edge of the reference side surface of the object under test when the target plane is obtained; Based on the scale value, the cross section of the object being tested through which the target plane passes is calculated on the corresponding side surface in the three-dimensional model of the object being tested.

10. The method according to claim 9, characterized in that, The reference side is the surface of the object to be tested that is perpendicular to both the placement plane and the side of the measuring column when the object to be tested is placed on the placement plane and the placement plane is horizontal.

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