Self-leveling omni-directional rcs standard

Abstract

The application discloses a self-leveling omni-directional RCS standard device and belongs to the technical field of RCS testing equipment, which comprises a cylindrical standard body, characterized in that the self-leveling omni-directional RCS standard device further comprises a support and a self-leveling mechanism, the lower end of a Y-axis cylindrical stabilizing column is rotationally connected with the support, the upper end is connected with a Y-axis vertical trapezoidal support through an X-axis horizontal circular bearing, the Y-axis vertical trapezoidal support is connected with a YZ-axis stabilizing block through a Y-axis vertical circular bearing, a Z-axis vertical circular bearing is embedded on the YZ-axis stabilizing block, an X-axis balance lever is connected with the Z-axis vertical circular bearing, one end of the X-axis balance lever is provided with a first X-axis balance expansion block, and the other end is provided with a second X-axis balance expansion block. The self-leveling omni-directional RCS standard device can effectively solve the attitude adjustment problem of the RCS standard device during installation and positioning, can quickly and accurately position the RCS standard device when low scattering is adopted, and greatly improves the positioning efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of RCS test equipment, and particularly relates to a self-leveling omni-directional RCS standard device. BACKGROUND

[0002] RCS, radar cross section, is a physical quantity representing the scattering condition of a target to incident radar waves, and is a core index in target stealth and target detection.

[0003] There are many methods for RCS measurement at present, but the basic principle of the test is mostly a comparison method, that is, a calibration body with a known radar cross section is used for comparison measurement, so theoretically, any object whose RCS true value can be obtained can be used as an RCS standard body. However, from the perspective of engineering application, the selection of the standard body should generally meet the following technical conditions:

[0004] 1. The scattering field or RCS value of the standard body can be accurately predicted in all measurement frequency bands.

[0005] 2. The standard body has low manufacturing cost, is easy to manufacture, and the manufacturing tolerance is easy to control within a reasonable range.

[0006] 3. In order to reduce the error caused by installation and alignment, the RCS of the standard body should be insensitive to the attitude under the condition of one of the spherical or cylindrical coordinate systems.

[0007] 4. The RCS of the standard body should not be too sensitive to the frequency and attitude angle.

[0008] In addition, the following problems should also be paid attention to in the selection and application of the standard body:

[0009] 1. Whether the calculated value of the RCS of the standard body is accurate enough.

[0010] 2. Whether the machining tolerance of the standard body is within an acceptable range.

[0011] 3. Whether the coupling between the standard body and the mounting bracket is small enough to not cause excessive calibration coupling error.

[0012] The main RCS standard body in the market is a sphere, which is independent of the attitude. However, the main disadvantage of the metal sphere standard body is that the RCS is sensitive to the shape processing error. The double-station scattering characteristics may cause large calibration body-mounting bracket coupling scattering error. In addition, the metal sphere is not convenient to install on a low-scattering metal bracket. Due to the disadvantages of the metal sphere, most advanced RCS test fields that currently use low-scattering metal brackets have abandoned the use of metal spheres and instead use other standard bodies as calibration bodies. However, other standard bodies are generally attitude-independent standard bodies, and placing the standard body and adjusting its attitude is a relatively difficult task. The chess piece model currently proposed reduces the sensitivity of the RCS to the up-down tilt angle within a certain tilt angle range, but does not truly solve the attitude installation and positioning problem. In addition, the RCS value of such a standard is relatively small, and it is difficult to make it large.

[0013] A Chinese patent document with publication number CN112066207A and publication date of December 11, 2020 discloses an integrated bracket for RCS testing of large-mass low-scattering targets, characterized in that the integrated bracket is made of wood with the following properties:

[0014] Air-dry density is (100-250) kg / m 3 ;

[0015] Air-dry hardness is (400-800) JH Jenkins hardness;

[0016] Moisture content is 8%-15%; and relative dielectric constant is not greater than 1.05;

[0017] The integrated bracket is spliced from the wood;

[0018] The splicing method is mortise and tenon connection;

[0019] The angle between the generatrix of the integrated bracket and the vertical line is 10°-20°;

[0020] The wood material is Bashan wood;

[0021] The integrated bracket is a circular truncated cone, including a plurality of horizontal support members and a plurality of longitudinal support members, and the horizontal support members and the longitudinal support members are spliced into an integrated structure by mortise and tenon connection.

[0022] The integrated bracket for RCS testing of large-mass low-scattering targets disclosed in the patent document has higher hardness and rigidity. However, it cannot effectively solve the attitude adjustment problem of the RCS standard body during installation and positioning, and it is difficult to accurately position the RCS standard body when using low scattering, and the positioning efficiency is low. SUMMARY

[0023] The present application can effectively solve the attitude adjustment problem of the RCS standarder during installation and positioning, can quickly and accurately position the RCS standarder when the scattering is low, and greatly improves the positioning efficiency.

[0024] The present application is realized by the following technical solutions:

[0025] The self-leveling omnidirectional RCS standarder comprises a cylindrical standard body, characterized in that it further comprises a support and a self-leveling mechanism arranged in the cylindrical standard body, the self-leveling mechanism comprises a Y-axis cylindrical stabilizing column, an X-axis horizontal circular bearing, a Y-axis vertical trapezoidal support, a Y-axis vertical circular bearing, a YZ-axis stabilizing block, a Z-axis vertical circular bearing and an X-axis balance rod, the lower end of the Y-axis cylindrical stabilizing column is rotationally connected with the support, the upper end of the Y-axis cylindrical stabilizing column is connected with the lower end of the Y-axis vertical trapezoidal support through the X-axis horizontal circular bearing, the upper end of the Y-axis vertical trapezoidal support is connected with the YZ-axis stabilizing block through the Y-axis vertical circular bearing, the Z-axis vertical circular bearing is embedded on the YZ-axis stabilizing block, the X-axis balance rod is connected with the Z-axis vertical circular bearing, one end of the X-axis balance rod is provided with a first X-axis balance expansion block, and the other end of the X-axis balance rod is provided with a second X-axis balance expansion block.

[0026] The Y-axis vertical trapezoidal support comprises a horizontal plate, an inclined connecting plate and a vertical plate, one end of the inclined connecting plate is fixedly connected with the horizontal plate, and the other end of the inclined connecting plate is fixedly connected with the vertical plate.

[0027] The X-axis horizontal circular bearing is mounted on the Y-axis cylindrical stabilizing column, and the horizontal plate is connected with the X-axis horizontal circular bearing.

[0028] The first X-axis balance expansion block and the second X-axis balance expansion block are symmetrically arranged along the vertical plate.

[0029] The support comprises a base and a support column fixed on the base, and the lower end of the Y-axis cylindrical stabilizing column is rotationally connected in the support column.

[0030] The base is disc-shaped, a groove is formed in the center of the base, the lower end of the support column is embedded in the groove, and the cylindrical standard body is fixed on the base.

[0031] The support column is cylindrical, and the diameter of the support column is 3 times the diameter of the Y-axis cylindrical stabilizing column.

[0032] The present application has the following advantages:

[0033] 1. The self-leveling mechanism comprises a Y-axis cylindrical stabilizing column, an X-axis horizontal circular bearing, a Y-axis vertical trapezoidal support, a Y-axis vertical circular bearing, a YZ-axis stabilizing block, a Z-axis vertical circular bearing and an X-axis balance lever, the lower end of the Y-axis cylindrical stabilizing column is rotatably connected with the support, the upper end of the Y-axis cylindrical stabilizing column is connected with the lower end of the Y-axis vertical trapezoidal support through the X-axis horizontal circular bearing, the upper end of the Y-axis vertical trapezoidal support is connected with the YZ-axis stabilizing block through the Y-axis vertical circular bearing, the Z-axis vertical circular bearing is embedded on the YZ-axis stabilizing block, the X-axis balance lever is connected with the Z-axis vertical circular bearing, one end of the X-axis balance lever is provided with a first X-axis balance expansion block, and the other end of the X-axis balance lever is provided with a second X-axis balance expansion block, compared with the prior art, the attitude adjustment problem of the RCS standard device during installation and positioning can be effectively solved, the RCS standard device can be accurately positioned quickly when low scattering is adopted, and the positioning efficiency is greatly improved.

[0034] 2. The Y-axis cylindrical stabilizing column and the Y-axis vertical trapezoidal support are connected through the X-axis horizontal circular bearing, so that the horizontal attitude change difference in the test process can be guaranteed to be offset by horizontal rotation, when the Y-axis vertical trapezoidal support is adjusted or rotated, the Y-axis vertical trapezoidal support is always connected with the Y-axis cylindrical stabilizing column and forms a horizontal rotation shaft through the X-axis horizontal circular bearing, due to the change of angular momentum, the Y-axis vertical trapezoidal support will also rotate correspondingly through the horizontal rotation shaft according to the change amplitude, so that a good horizontal attitude is ensured.

[0035] 3. The Y-axis cylindrical stabilizing column and the Y-axis vertical trapezoidal support are connected through the X-axis horizontal circular bearing, so that any direction change in the test process can be guaranteed, and the direction of the measurement main body is always stable, when the Y-axis vertical trapezoidal support is adjusted or rotated, the Y-axis vertical trapezoidal support is always connected with the Y-axis cylindrical stabilizing column and forms a horizontal rotation shaft through the X-axis horizontal circular bearing, due to the inertia of gravity, the Y-axis vertical trapezoidal support will rotate in the direction of the center of gravity of the Y-axis vertical trapezoidal support on the horizontal rotation shaft, so that a good vertical attitude is ensured.

[0036] 4. The Y-axis vertical trapezoidal support and the YZ-axis stabilizing block are connected through the Y-axis vertical circular bearing, so that any direction change in the measurement process can be guaranteed, and the measurement main body is always perpendicular to the horizontal direction, the YZ-axis stabilizing block will keep the stability of the center of gravity due to the action of gravity, and the gravity will act in the direction of increasing the inclination of the attitude adjustment, so that the YZ-axis stabilizing block is always perpendicular to the horizontal direction under the action of the external force changing the direction thereof, and the measurement stability in the vertical direction is ensured.

[0037] 5、The application, by setting the first X-axis balance expansion block at one end of the X-axis balance lever, setting the second X-axis balance expansion block at the other end of the X-axis balance lever, and symmetrically arranging the first X-axis balance expansion block and the second X-axis balance expansion block along the vertical plate, can guarantee that the measurement main body is always in a horizontal parallel direction during any attitude change or direction displacement change in the test process, and ensure the measurement stability in the horizontal direction.

[0038] 6、The application, when the self-leveling mechanism adjusts the attitude, the three-direction rotating shafts in the self-leveling mechanism interact with each other, guarantee the stability in the X-axis, Y-axis and Z-axis directions during the measurement work, and eliminate the measurement deviation problem caused by human factors during the measurement process.

[0039] 7、The application, by the three-axis stability design, guarantees the measurement stability and direction stability of the RCS standard device, effectively solves the problems of low measurement efficiency and low measurement accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0040] The application will be further specifically explained below in combination with the drawings in the specification and the specific embodiments, in which:

[0041] Figure 1 is a structural schematic view of the application;

[0042] Marked in the figure: 1, Y-axis cylindrical stable column, 2, X-axis horizontal circular bearing, 3, Y-axis vertical trapezoidal support, 4, Y-axis vertical circular bearing, 5, YZ-axis stable block, 6, Z-axis vertical circular bearing, 7, X-axis balance lever, 8, first X-axis balance expansion block, 9, second X-axis balance expansion block, 10, cylindrical standard body, 11, support, 12, horizontal plate, 13, inclined connecting plate, 14, vertical plate, 15, base, 16, support column. DETAILED DESCRIPTION

[0043] Example 1

[0044] Reference Figure 1The application discloses a self-leveling omni-directional RCS standard device, which comprises a cylindrical standard body 10, a support 11 and a self-leveling mechanism arranged in the cylindrical standard body 10, wherein the self-leveling mechanism comprises a Y-axis cylindrical stabilizing column 1, an X-axis horizontal circular bearing 2, a Y-axis vertical trapezoidal support 3, a Y-axis vertical circular bearing 4, a YZ-axis stabilizing block 5, a Z-axis vertical circular bearing 6 and an X-axis balance rod 7, the lower end of the Y-axis cylindrical stabilizing column 1 is rotationally connected with the support 11, the upper end of the Y-axis cylindrical stabilizing column 1 is connected with the lower end of the Y-axis vertical trapezoidal support 3 through the X-axis horizontal circular bearing 2, the upper end of the Y-axis vertical trapezoidal support 3 is connected with the YZ-axis stabilizing block 5 through the Y-axis vertical circular bearing 4, the Z-axis vertical circular bearing 6 is embedded on the YZ-axis stabilizing block 5, the X-axis balance rod 7 is connected with the Z-axis vertical circular bearing 6, one end of the X-axis balance rod 7 is provided with a first X-axis balance expansion block 8, and the other end of the X-axis balance rod 7 is provided with a second X-axis balance expansion block 9.

[0045] The self-leveling mechanism comprises a Y-axis cylindrical stabilizing column 1, an X-axis horizontal circular bearing 2, a Y-axis vertical trapezoidal support 3, a Y-axis vertical circular bearing 4, a YZ-axis stabilizing block 5, a Z-axis vertical circular bearing 6 and an X-axis balance rod 7, the lower end of the Y-axis cylindrical stabilizing column 1 is rotationally connected with the support 11, the upper end of the Y-axis cylindrical stabilizing column 1 is connected with the lower end of the Y-axis vertical trapezoidal support 3 through the X-axis horizontal circular bearing 2, the upper end of the Y-axis vertical trapezoidal support 3 is connected with the YZ-axis stabilizing block 5 through the Y-axis vertical circular bearing 4, the Z-axis vertical circular bearing 6 is embedded on the YZ-axis stabilizing block 5, the X-axis balance rod 7 is connected with the Z-axis vertical circular bearing 6, one end of the X-axis balance rod 7 is provided with a first X-axis balance expansion block 8, and the other end of the X-axis balance rod 7 is provided with a second X-axis balance expansion block 9.

[0046] Embodiment 2

[0047] Reference Figure 1The application discloses a self-leveling omni-directional RCS standard device, which comprises a cylindrical standard body 10, a support 11 and a self-leveling mechanism arranged in the cylindrical standard body 10, wherein the self-leveling mechanism comprises a Y-axis cylindrical stabilizing column 1, an X-axis horizontal circular bearing 2, a Y-axis vertical trapezoidal support 3, a Y-axis vertical circular bearing 4, a YZ-axis stabilizing block 5, a Z-axis vertical circular bearing 6 and an X-axis balance rod 7, the lower end of the Y-axis cylindrical stabilizing column 1 is rotationally connected with the support 11, the upper end of the Y-axis cylindrical stabilizing column 1 is connected with the lower end of the Y-axis vertical trapezoidal support 3 through the X-axis horizontal circular bearing 2, the upper end of the Y-axis vertical trapezoidal support 3 is connected with the YZ-axis stabilizing block 5 through the Y-axis vertical circular bearing 4, the Z-axis vertical circular bearing 6 is embedded on the YZ-axis stabilizing block 5, the X-axis balance rod 7 is connected with the Z-axis vertical circular bearing 6, one end of the X-axis balance rod 7 is provided with a first X-axis balance expansion block 8, and the other end of the X-axis balance rod 7 is provided with a second X-axis balance expansion block 9.

[0048] The Y-axis vertical trapezoidal support 3 comprises a horizontal plate 12, an inclined connecting plate 13 and a vertical plate 14, one end of the inclined connecting plate 13 is fixedly connected with the horizontal plate 12, and the other end of the inclined connecting plate 13 is fixedly connected with the vertical plate 14.

[0049] In the embodiment, the Y-axis cylindrical stabilizing column 1 is connected with the Y-axis vertical trapezoidal support 3 through the X-axis horizontal circular bearing 2, so that the horizontal posture change difference in the test process can be guaranteed to be offset through horizontal rotation, when the Y-axis vertical trapezoidal support 3 is adjusted in posture or rotated in direction, the Y-axis vertical trapezoidal support 3 is always connected with the Y-axis cylindrical stabilizing column 1 and forms a horizontal rotation shaft through the X-axis horizontal circular bearing 2, due to angular momentum change, the Y-axis vertical trapezoidal support 3 also rotates correspondingly through the horizontal rotation shaft according to the change amplitude, so that a good horizontal posture is guaranteed.

[0050] Embodiment 3

[0051] Reference Figure 1The application discloses a self-leveling omni-directional RCS standard device, which comprises a cylindrical standard body 10, a support 11 and a self-leveling mechanism arranged in the cylindrical standard body 10, wherein the self-leveling mechanism comprises a Y-axis cylindrical stabilizing column 1, an X-axis horizontal circular bearing 2, a Y-axis vertical trapezoidal support 3, a Y-axis vertical circular bearing 4, a YZ-axis stabilizing block 5, a Z-axis vertical circular bearing 6 and an X-axis balance rod 7, the lower end of the Y-axis cylindrical stabilizing column 1 is rotationally connected with the support 11, the upper end of the Y-axis cylindrical stabilizing column 1 is connected with the lower end of the Y-axis vertical trapezoidal support 3 through the X-axis horizontal circular bearing 2, the upper end of the Y-axis vertical trapezoidal support 3 is connected with the YZ-axis stabilizing block 5 through the Y-axis vertical circular bearing 4, the Z-axis vertical circular bearing 6 is embedded on the YZ-axis stabilizing block 5, the X-axis balance rod 7 is connected with the Z-axis vertical circular bearing 6, one end of the X-axis balance rod 7 is provided with a first X-axis balance expansion block 8, and the other end of the X-axis balance rod 7 is provided with a second X-axis balance expansion block 9.

[0052] The Y-axis vertical trapezoidal support 3 comprises a horizontal plate 12, an inclined connecting plate 13 and a vertical plate 14, one end of the inclined connecting plate 13 is fixedly connected with the horizontal plate 12, and the other end of the inclined connecting plate 13 is fixedly connected with the vertical plate 14.

[0053] The X-axis horizontal circular bearing 2 is installed on the Y-axis cylindrical stabilizing column 1, and the horizontal plate 12 is connected with the X-axis horizontal circular bearing 2.

[0054] In the embodiment, the Y-axis cylindrical stabilizing column 1 is connected with the Y-axis vertical trapezoidal support 3 through the X-axis horizontal circular bearing 2, so that the direction of the measuring body can be kept stable in any direction change during the test, and the Y-axis vertical trapezoidal support 3 is always connected with the Y-axis cylindrical stabilizing column 1 and forms a horizontal rotating shaft through the X-axis horizontal circular bearing 2, so that the Y-axis vertical trapezoidal support 3 can rotate in the direction of the gravity center of the Y-axis vertical trapezoidal support 3, thereby guaranteeing a good vertical posture.

[0055] Embodiment 4

[0056] Reference Figure 1The application discloses a self-leveling omni-directional RCS standard device, which comprises a cylindrical standard body 10, a support 11 and a self-leveling mechanism arranged in the cylindrical standard body 10, wherein the self-leveling mechanism comprises a Y-axis cylindrical stabilizing column 1, an X-axis horizontal circular bearing 2, a Y-axis vertical trapezoidal support 3, a Y-axis vertical circular bearing 4, a YZ-axis stabilizing block 5, a Z-axis vertical circular bearing 6 and an X-axis balance rod 7, the lower end of the Y-axis cylindrical stabilizing column 1 is rotationally connected with the support 11, the upper end of the Y-axis cylindrical stabilizing column 1 is connected with the lower end of the Y-axis vertical trapezoidal support 3 through the X-axis horizontal circular bearing 2, the upper end of the Y-axis vertical trapezoidal support 3 is connected with the YZ-axis stabilizing block 5 through the Y-axis vertical circular bearing 4, the Z-axis vertical circular bearing 6 is embedded on the YZ-axis stabilizing block 5, the X-axis balance rod 7 is connected with the Z-axis vertical circular bearing 6, one end of the X-axis balance rod 7 is provided with a first X-axis balance expansion block 8, and the other end of the X-axis balance rod 7 is provided with a second X-axis balance expansion block 9.

[0057] The Y-axis vertical trapezoidal support 3 comprises a horizontal plate 12, an inclined connecting plate 13 and a vertical plate 14, one end of the inclined connecting plate 13 is fixedly connected with the horizontal plate 12, and the other end of the inclined connecting plate 13 is fixedly connected with the vertical plate 14.

[0058] The X-axis horizontal circular bearing 2 is installed on the Y-axis cylindrical stabilizing column 1, and the horizontal plate 12 is connected with the X-axis horizontal circular bearing 2.

[0059] The first X-axis balance expansion block 8 and the second X-axis balance expansion block 9 are symmetrically arranged along the vertical plate 14.

[0060] The support 11 comprises a base 15 and a support column 16 fixed on the base 15, and the lower end of the Y-axis cylindrical stabilizing column 1 is rotationally connected in the support column 16.

[0061] In the embodiment, the Y-axis vertical trapezoidal support 3 is connected with the YZ-axis stabilizing block 5 through the Y-axis vertical circular bearing 4, so that the measuring body is always perpendicular to the horizontal direction during the measurement process, the YZ-axis stabilizing block 5 can keep the stability of the gravity center under the action of gravity, the gravity can act on the direction of increasing the posture adjustment inclination, the YZ-axis stabilizing block 5 is always perpendicular to the horizontal direction under the action of external force changing the direction, and thus the measurement stability in the vertical direction is ensured.

[0062] The first X-axis balance expansion block 8 is arranged at one end of the X-axis balance rod 7, the second X-axis balance expansion block 9 is arranged at the other end of the X-axis balance rod 7, and the first X-axis balance expansion block 8 and the second X-axis balance expansion block 9 are symmetrically arranged along the vertical plate 14, so that any posture change or direction displacement change can occur during the test process, the measuring body is always in the horizontal parallel direction, and thus the measurement stability in the horizontal direction is ensured.

[0063] Embodiment 5

[0064] Referring to Figure 1 The self-leveling omni-directional RCS standard device comprises a cylindrical standard body 10, a support 11 and a self-leveling mechanism arranged in the cylindrical standard body 10, wherein the self-leveling mechanism comprises a Y-axis cylindrical stabilizing column 1, an X-axis horizontal circular bearing 2, a Y-axis vertical trapezoidal support 3, a Y-axis vertical circular bearing 4, a YZ-axis stabilizing block 5, a Z-axis vertical circular bearing 6 and an X-axis balance rod 7, the lower end of the Y-axis cylindrical stabilizing column 1 is rotationally connected with the support 11, the upper end of the Y-axis cylindrical stabilizing column 1 is connected with the lower end of the Y-axis vertical trapezoidal support 3 through the X-axis horizontal circular bearing 2, the upper end of the Y-axis vertical trapezoidal support 3 is connected with the YZ-axis stabilizing block 5 through the Y-axis vertical circular bearing 4, the Z-axis vertical circular bearing 6 is embedded on the YZ-axis stabilizing block 5, the X-axis balance rod 7 is connected with the Z-axis vertical circular bearing 6, one end of the X-axis balance rod 7 is provided with a first X-axis balance expansion block 8, and the other end of the X-axis balance rod 7 is provided with a second X-axis balance expansion block 9.

[0065] The Y-axis vertical trapezoidal support 3 comprises a horizontal plate 12, an inclined connecting plate 13 and a vertical plate 14, one end of the inclined connecting plate 13 is fixedly connected with the horizontal plate 12, and the other end of the inclined connecting plate 13 is fixedly connected with the vertical plate 14.

[0066] The X-axis horizontal circular bearing 2 is installed on the Y-axis cylindrical stabilizing column 1, and the horizontal plate 12 is connected with the X-axis horizontal circular bearing 2.

[0067] The first X-axis balance expansion block 8 and the second X-axis balance expansion block 9 are symmetrically arranged along the vertical plate 14.

[0068] The support 11 comprises a base 15 and a support column 16 fixed on the base 15, and the lower end of the Y-axis cylindrical stabilizing column 1 is rotationally connected in the support column 16.

[0069] The base 15 is disc-shaped, a recess is formed in the center of the base 15, the lower end of the support column 16 is embedded in the recess, and the cylindrical standard body 10 is fixed on the base 15.

[0070] The support column 16 is cylindrical, and the diameter of the support column 16 is 3 times the diameter of the Y-axis cylindrical stabilizing column 1.

[0071] In the best embodiment, when the posture of the self-leveling mechanism is adjusted, the three rotating shafts in the self-leveling mechanism interact with each other, so that the stability in the X-axis, Y-axis and Z-axis directions during the measurement is ensured, and the measurement deviation caused by human factors during the measurement is eliminated.

[0072] Through the triaxial stable design, the measurement stability and direction stability of the RCS standard device are ensured, and the problems of low measurement efficiency and low measurement accuracy are effectively solved.

[0073] The working principle of the present application is as follows:

[0074] The Y-axis cylindrical stabilizing column 1 is connected with the X-axis horizontal circular bearing 2 to form an XZ rotating shaft perpendicular to the Y-axis, and the connecting part of the Y-axis cylindrical stabilizing column 1 and the Y-axis vertical trapezoidal support 3 can pass through the X-axis horizontal circular bearing 2, so that the Y-axis vertical trapezoidal support 3 can be adjusted in posture and rotated in direction on the XZ rotating shaft in the horizontal direction, and the stability and the posture gravity center of the Y-axis vertical trapezoidal support 3 in the horizontal direction will not be changed due to the directional rotation or displacement posture adjustment of the Y-axis cylindrical stabilizing column 1, so as to ensure the stability of the Y-axis vertical trapezoidal support 3 during the working measurement, and the X-axis horizontal circular bearing 2 provides a horizontal rotating amount for the Y-axis vertical trapezoidal support 3, so as to ensure that the Y-axis vertical trapezoidal support 3 is always connected with the Y-axis cylindrical stabilizing column 1 during the posture adjustment or directional rotation of the Y-axis vertical trapezoidal support 3, and the posture of the overall structure is always horizontal to the ground during the rotation process.

[0075] The Y-axis vertical trapezoidal support 3 is connected with the YZ-axis stabilizing block 5 through the Y-axis vertical circular bearing 4 to form an XY rotating shaft perpendicular to the X-axis and the Y-axis and parallel to the Z-axis, when the overall structure is adjusted in posture, the YZ-axis stabilizing block 5 is rotated in the posture adjustment direction through the rotating shaft, the YZ-axis stabilizing block 5 will keep the stability of the gravity center due to the action of gravity, and the gravity will act in the direction of increasing the posture adjustment inclination, so as to ensure that the YZ-axis stabilizing block 5 is always perpendicular to the horizontal direction under the action of the external force changing the direction.

[0076] The center position of the X-axis balance rod 7 is connected with the Z-axis vertical circular bearing 6, so as to ensure that the forces on both ends of the X-axis balance rod 7 in the horizontal direction are uniform, when the overall structure is adjusted in posture, the balance piece formed by the X-axis balance rod 7 and the X-axis balance expansion block keeps the stability of the gravity center due to the action of gravity, and the balance piece will change in posture along with the posture adjustment direction, but since the balance piece is fixed in the direction of the YZ-axis stabilizing block 5 in the Y-axis, when the balance piece changes in posture in the X-axis and the Z-axis on the YZ rotating shaft, the YZ-axis stabilizing block 5 is always perpendicular to the horizontal direction, and when the balance piece changes in posture and displacement through the YZ rotating shaft, the X-axis balance rod 7 with uniform forces on both ends is always perpendicular to the horizontal direction, and the balance piece keeps the horizontal parallel direction in the Z-axis. The overall structure is always stable in posture and horizontal to the ground during rotation in any direction.

[0077] The application scenarios of the present application are as follows:

[0078] In vehicle-mounted measurement, the measurement posture and direction are constantly changing due to the change of vehicle speed, the change of terrain and the change of driving direction. The self-leveling omnidirectional RCS standarder can adjust the three degrees of freedom of the three rotating shafts to keep the test measurement in a stable state, thereby ensuring the accuracy and correctness of the test measurement.

[0079] In handheld measurement, the test measurement process may produce slight resonance or displacement due to the temporary change of the moment of the hand. The self-leveling omnidirectional RCS standarder can keep the test measurement in a stable state, thereby ensuring the accuracy and correctness of the test measurement.

[0080] In stable state test measurement, the measurement equipment may produce slight posture change or direction displacement adjustment due to the vibration caused by some resonance of the ground or experimental site. The self-leveling omnidirectional RCS standarder with stable three-axis structure can quickly adjust its posture and direction to ensure the stability of the test measurement.

Claims

1. A self-leveling omnidirectional RCS standard, comprising a cylindrical standard body (10), characterized in that: The invention also includes a bracket (11) and a self-leveling mechanism arranged in a cylindrical standard body (10), wherein the self-leveling mechanism includes a Y-axis cylindrical stabilizing column (1), an X-axis horizontal circular bearing (2), a Y-axis vertical trapezoidal bracket (3), a Y-axis vertical circular bearing (4), a YZ-axis stabilizing block (5), a Z-axis vertical circular bearing (6) and an X-axis balancing rod (7), wherein the lower end of the Y-axis cylindrical stabilizing column (1) is rotatably connected to the bracket (11), and the upper end of the Y-axis cylindrical stabilizing column (1) is connected to the X-axis horizontal circular axis. The bearing (2) is connected to the lower end of the Y-axis vertical trapezoidal bracket (3), the upper end of the Y-axis vertical trapezoidal bracket (3) is connected to the YZ-axis stabilizing block (5) through the Y-axis vertical circular bearing (4), the Z-axis vertical circular bearing (6) is embedded in the YZ-axis stabilizing block (5), the X-axis balancing rod (7) is connected to the Z-axis vertical circular bearing (6), one end of the X-axis balancing rod (7) is provided with a first X-axis balancing extension block (8), and the other end of the X-axis balancing rod (7) is provided with a second X-axis balancing extension block (9); The Y-axis vertical trapezoidal bracket (3) comprises a horizontal plate (12), an inclined connecting plate (13) and a vertical plate (14), one end of the inclined connecting plate (13) is fixedly connected to the horizontal plate (12), and the other end of the inclined connecting plate (13) is fixedly connected to the vertical plate (14); The first X-axis balancing expansion block (8) and the second X-axis balancing expansion block (9) are symmetrically arranged along the vertical plate (14).

2. The self-leveling omnidirectional RCS standard according to claim 1, characterized in that: The X-axis horizontal circular bearing (2) is mounted on the Y-axis cylindrical stabilizing column (1), and the horizontal plate (12) is connected to the X-axis horizontal circular bearing (2).

3. The self-leveling omnidirectional RCS standard according to claim 1, characterized in that: The bracket (11) comprises a base (15) and a support (16) fixed to the base (15), and the lower end of the Y-axis cylindrical stabilizing column (1) is rotatably connected in the support (16).

4. The self-leveling omnidirectional RCS standard according to claim 3, characterized in that: The base (15) is disc-shaped, and a groove is formed in the center of the base (15). The lower end of the support (16) is embedded in the groove, and the cylindrical standard body (10) is fixed on the base (15).

5. The self-leveling omnidirectional RCS standard according to claim 3, characterized in that: The support column (16) is cylindrical, and the diameter of the support column (16) is three times the diameter of the Y-axis cylindrical stabilizing column (1).

Images