WO2018148917A1

WO2018148917A1 - Aerospace-grade ball grid detection system

Info

Publication number: WO2018148917A1
Application number: PCT/CN2017/073848
Authority: WO
Inventors: 储建华; 高霞
Original assignee: 苏州科爱佳自动化科技有限公司
Priority date: 2017-02-17
Filing date: 2017-02-17
Publication date: 2018-08-23
Also published as: CN110520690B; CN110520690A

Abstract

Disclosed is an aerospace-grade ball grid detection system, comprising a base (100), with a power cylinder (120) rotationally arranged at the centre of same; a top plate (300) rotationally arranged on the base (100), wherein a free board (200) is rotationally arranged in the centre of the bottom of the top plate (300), a bottom face of the free board (200) is provided with an arc-shaped wire slot (210), and the top of the power cylinder (120) is limited to move in the arc-shaped wire slot (210); and a rotation table (400) coaxially and rotationally arranged on an upper surface of the top plate (300). A first angular displacement ball grid is arranged on the base (100), and comprises a semi-annular first ball grid scale (141) and a first reading head (142) sheathed on the first ball grid scale (141). The first reading head (142) is synchronously arranged on a side wall of the power cylinder (120). A second angular displacement ball grid is configured on the top plate (300), and comprises a second ball grid scale (341) with a certain arc length, and a second reading head (342) sheathed on the second ball grid scale (341). The second ball grid scale (341) is located on the outer periphery of the top plate (300). The second reading head (342) is synchronously arranged on the rotation table (400).

Description

Space-grade ball grid detection system

Technical field

[0001] The present invention relates to the field of precision measurement techniques, and more particularly to a space grade ball grid detection system.

Background technique

[0002] The ball grid is a displacement sensor that was developed in the 1970s. During the detection of mechanical line displacement or angular displacement, the spherical ball sensor is not continuous due to the error of the constituent ball itself. The control system can be clearly identified and eliminated, and the measurement accuracy can be increased infinitely, and the error can be approached to zero. At present, such ball grids have been used in high-end equipment. As people's knowledge and cost are reduced, this piece will be popularized in industries and equipment that need to be measured, including on aerospace equipment.

[0003] The current takeoff mode of a spacecraft is vertical launch and tilt rise; the landing mode is the same as its reverse. Aircraft that operate differently from the atmosphere are only subjected to gravity. After the spacecraft is separated from the atmosphere, there will be gravitational effects of different planets and different directions, including microgravity and no gravity. If the parts running in this actual situation can be simulated realistically on the ground or under laboratory conditions, and the components are included in the system, the cost of the parts of the spacecraft can be reduced under the premise of quality assurance. To ordinary. In the same way, the construction cost of the spacecraft can be returned to the general condition on the premise that the safety is guaranteed.

[0004] Chinese Patent No.: 201210556612.X and CN203479545U, the patent name is "Multi-Dimensional Tilting Swing Combination Device", and a tilting swing device is proposed, which can be used in various laboratories, ships, etc. in the world. The experimental simulation of the actual installation position or motion trajectory of the component, but its shortcomings are: The omnidirectional oscillation and rotation cannot be realized, and the spatial trajectory of the motion cannot be accurately determined, that is, the true motion trajectory of the sample cannot be accurately simulated. , making the test conditions limited, unable to obtain accurate and valid data.

technical problem

An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described later.

[0006] Another object of the present invention is to provide a space-level ball grid detection system, which provides a new space simulation motion device, which can simulate a high-precision real motion process, improve the reliability of test data and Accuracy, especially if the device can be connected to the current swing table, vibration table, rotary table, acceleration test machine, collision machine, weightless room and related sports equipment, test equipment, for example, can show space travel The device moves from launch or take-off to landing or landing in different sports situations, including the participation of this device in the spacecraft.

Problem solution

Technical solution

In order to achieve these and other advantages in accordance with the present invention, an aerospace grade ball grid detection system is provided, comprising:

[0008] The base has a pair of first brackets extending vertically upwardly on the two sides of the radial direction, a slot is longitudinally disposed on the first bracket, and a power cylinder is disposed in the center of the base;

[0009] The top plate has a pair of second brackets extending vertically downwardly on the two sides of the radial direction, and the bottom of the second bracket is disposed on the slot through the rotation of the rotating shaft, and the center of the top of the dial is provided with a free rotation. a bottom plate of the free plate is provided with a curved wire groove, and the top of the power cylinder is restricted to move in the curved wire groove;

[0010] a rotating table, which is disposed on the upper surface of the top plate with the central axis, and the upper surface of the rotating table is provided with a mounting hole for fixing the sample;

[0011] wherein the base is provided with a first angular displacement ball grid, the first angular displacement ball grid comprises a first annular ball scale and a first sleeve disposed on the first ball scale a readhead, the first ball scale is in a plane of rotation of the power cylinder, and the first readhead is synchronously disposed on a side wall of the power cylinder;

[0012] a second angular displacement ball grid is disposed on the top plate, and the second angular displacement ball grid includes a second ball scale having a certain arc length and a second sleeve disposed on the second ball scale a second reading head, the second ball scale is located on the outer circumference of the top plate, and the second reading head is synchronously disposed on the rotating table.

[0013] Preferably, the center of the base is convexly provided with a pair of rotating shaft seats, the height of the rotating shaft seat is not more than 10 mm, and a bottom of the power cylinder is convexly provided with a bearing with a shaft hole, the bearing Supported on the rotating shaft seat by a rotating shaft, the bearing is located in a gap between the two rotating shaft seats.

[0014] Preferably, the rotating shaft support is fixed on the slot at any height position, and the bottom of the second bracket is rotatably sleeved on the rotating shaft support.

[0015] Preferably, the center of the surface of the free plate is convexly provided with a first column head, and the lower end of the center of the top plate corresponds to The first column hole is disposed, the free plate is restricted from rotating in the first column hole by the first column head, the top of the power cylinder is convexly provided with a second column head, and the second column head restricts sliding In the curved wire groove, the curved wire groove may be a profiled wire groove or a closed wire groove.

[0016] Preferably, the center of the lower surface of the rotating table is convexly provided with a third column head, and the center of the upper end of the top plate is correspondingly provided with a second column hole, and the rotating table is restricted in rotation by the third column head. In the second column hole.

[0017] Preferably, the outer diameter of the rotating table is larger than the outer diameter of the top plate, and the lower end of the rotating table is provided with a rack with a certain arc length, and the outer diameter of the rack is between the top plate Between the outer peripheral diameter and the outer diameter of the second ball scale, the rack is disposed downward, and the rack is located at the outer circumference of the top plate.

[0018] Preferably, a driving mechanism is disposed on the outer bottom of the top plate, and a gear that meshes with the rack is disposed on the driving shaft of the driving mechanism.

[0019] Preferably, the power cylinder is a multi-stage power cylinder, the first reading head is disposed on a cylinder block of the power cylinder, and two ends of the first ball scale extend upward from the base respectively. The rotating shaft is perpendicular to a plane in which the first ball scale is located.

[0020] Preferably, the lower surface of the rotating table and the upper surface of the top plate are connected by a slewing bearing.

[0021] Preferably, the base is provided with a plurality of positioning holes matched with the mounting holes, and a plurality of the aerospace-level ball grid detecting systems are selectively connected to the base and the rotating base.

Advantageous effects of the invention

Beneficial effect

[0022] The present invention includes at least the following beneficial effects:

[0023] 1. The swinging process of the top plate is smoother, the card machine phenomenon is not generated during the swinging process, the swing range of the same is larger, and the 360° rotation process can be provided, and the omnidirectional space trajectory simulation is realized;

[0024] 2. The entire swing process and the amount of the rotation process are accurately measurable, and a high-precision space trajectory simulation condition is provided.

Improve the reliability and accuracy of test measurement data.

[0025] Other advantages, objects, and features of the invention will be set forth in part in the description which follows.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of a space-level ball grid detection system from a first perspective; 2 is a schematic structural view of a space-level ball grid detection system from a second perspective; [0027] FIG.

[0028] FIG. 3 is an exploded view of a space-grade ball grid detection system;

[0029] FIG. 4 is a schematic view showing a mounting structure of a power cylinder and a base;

[0030] FIG. 5 is a schematic structural view of a power cylinder;

Figure 6 is a bottom plan view of the free plate in the first embodiment;

Figure 7 is a cross-sectional view taken along line A-A of Figure 6;

[0033] FIG. 8 is a schematic diagram of a superimposed installation structure of two aerospace grade ball grid detection systems;

[0034] FIG. 9 is a schematic diagram showing a superimposed installation structure of three aerospace grade ball grid detection systems;

Figure 10 is a bottom plan view of the free plate in the fourth embodiment;

11 is a schematic structural view of a space-level ball grid detecting system in a fourth embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings.

[0038] It is to be understood that the terms such as "having", "comprising" and "comprising" are used in the <RTIgt;

[0039] Embodiment 1

[0040] The present invention provides a space-grade ball grid detection system, as shown in FIGS. 1-7, including a base 100, a power cylinder 120, a free plate 200, a top plate 300, and a rotary table 400, and a rotary table 400 with a top plate 300 swings back and forth on the base 100, and the test sample is fixedly rotated on the rotating table 400, thereby realizing the simulation of the omnidirectional spatial motion trajectory of the sample, and is used for testing the experimental data of the test article in the spatial motion trajectory simulation.

[0041] Specifically, a pair of first brackets 110 are vertically extended on the two sides of the base 100, and a slot 111 is vertically disposed on the first bracket 110. The base 100 is convexly disposed at the center of the base 100. A shaft cylinder 130 is rotatably disposed on the shaft base 130. A support 123 having a shaft hole is protruded from the bottom of the power cylinder 120. The support base 123 is rotatably supported on the shaft base 130 by a rotating shaft. Similarly, the support 123 is just right. Located in the gap between the two shaft seats 130, the bottom of the power cylinder 120 is swung around the rotating shaft and restricted in the gap between the two shaft seats 130.

[0042] A pair of second brackets 310 are vertically extended downward on the radial sides of the top plate 300, and the second bracket 310 is connected to the bottom. The rotating shaft support 320 is rotatably disposed on the slot 111, and the outer side of the rotating shaft support 320 is sleeved in the slot 111 and fixed on the slot 111 at any height position, and the bottom of the second bracket 310 is rotatably sleeved on the rotating shaft support 320. Thereby, the free swing of the top plate 300 on the base 100 is achieved. Before each test, the height of the shaft support 320 fixed on the slot 111 can be manually adjusted to adjust the swing radius of the top plate 300 on the base 100.

[0043] A free plate 200 is disposed at a center of the bottom of the top plate 300. Specifically, a first column head is disposed at a center of the upper surface of the free plate 200, and a first column hole 350 is disposed at a lower end of the center of the top plate 300, and the free plate 200 is provided. The first column head is restricted from rotating in the first column hole 350, and the upper surface of the free plate 200 is rotated in contact with the lower surface of the top plate 300 to avoid a gap between the free plate 200 and the top plate 300 during the swing of the top plate 300. Movement causes the oscillating trajectory of the top plate 300 to cause an error.

[0044] The bottom surface of the free plate 200 is provided with a profiled wire groove 210. The top of the power cylinder 120 is convexly provided with a second column head 121. The second column head 121 restricts sliding in the profiled wire groove 210. As the power cylinder 120 expands and contracts, The power cylinder 120 is responsive to the movement of the wire free plate 200. The second column head 121 is restricted from sliding back and forth in the profiled wire slot 210. At the same time, the free plate 200 is pushed to reciprocately rotate at the bottom of the top plate 300, and the top plate 300 is pushed around the rotating shaft support 320. Rotating on the base 100, the free plate 200 and its profiled slot 210 can make the expansion and contraction of the power cylinder 120 smoother, and it is more advantageous to control the swing angle of the top plate 300 by controlling the amount of expansion and contraction of the power cylinder 120, thereby avoiding the power cylinder 120. The top card is stuck at the bottom of the top plate 300.

[0045] The power cylinder 120 is a multi-stage power cylinder. The power controller 122 of the power cylinder 120 is directly mounted on the sidewall of the bottom cylinder block of the power cylinder 120. The top plate 300 is controlled by the telescopic movement of the multi-stage power cylinder to swing. The height of the rotating shaft seat 130 is not more than 10 mm, and the diameter of the curved portion of the rotating shaft seat 130 is not more than 3 mm. The multi-stage power cylinder is operated under the control of the power controller, and is constrained by the rotating shaft. The multi-stage power cylinder drives the free plate to rotate and pushes the top plate 300 to swing. When the piston of the top end of the multi-stage power cylinder rises to the pole吋, the power controller releases commands and actions according to the settings, and determines a small displacement of a certain side of the rotating shaft shaft seat 130 at the bottom of the multi-stage power cylinder. The controlled swing of the dome disk 300 does not have various types of equipment. The occurrence of the "midpoint" and the phenomenon of jamming completely eliminates the current travel-reduction behavior of similar equipment to avoid crashes, and realizes the free and smooth swing of the entire top plate. The power cylinder and the top plate do not cause the card machine phenomenon. It is possible to increase the amount of expansion and contraction of the power cylinder, that is, the swinging curvature of the top plate 300, and the swing range of the top plate 300 is larger.

[0046] The rotating table 400 is disposed on the upper surface of the top plate 300 together with the central axis, specifically, in the lower surface of the rotating table 400. The center of the top plate 300 is provided with a third column head 420. The center of the upper end of the top plate 300 is correspondingly provided with a second column hole. The rotating table 400 is restricted from rotating in the second column hole by the third column head 420. The lower surface of the rotating table 400 and the top plate 300 The upper surface is fitted and rotated to avoid a gap movement between the rotary table 400 and the top plate 300 during the rotation of the rotary table 400, so that the movement path of the rotary table 400 causes an error.

[0047] The outer diameter of the rotating table 400 is larger than the outer diameter of the top plate 300, and the lower end of the rotating table 400 is provided with a rack 410 of a certain arc length. The arc length of the rack 410 determines the rotating range of the rotating table 400. In the example, the arc length of the rack 41 0 corresponds to an arc range of 180°, and the envelope is on the half circumference of the rotating table. It can be understood that the arc length of the rack 410 may correspond to an arc range of 360°. The turntable can achieve 360° free rotation on the entire circumference of the turntable. A drive mechanism 330 is disposed on the outer bottom of the top plate 300. A drive shaft 330 of the drive mechanism 330 extends toward the outer side of the top plate 300 to provide a gear 331 that meshes with the rack 410. Thus, when the drive mechanism 330 drives the gear 331 to rotate, the gear 331 can drive the rack 410 to move, and drive the rotating table 400 to rotate around the center, so that the rotating table 400 moves with the swinging movement of the top plate 300, and the rotating table 400 itself can realize 360° rotation, that is, the rotating table provides The omnidirectional spatial trajectory simulation provides test conditions. The test specimens mounted on the rotary table 400 can perform corresponding multi-space positions and motion trajectories to obtain the required test data.

[0048] wherein, in order to measure the swing angle and the spatial position of the top tray 300, a first angular displacement ball grid is disposed on the base 100, and the first angular displacement ball grid includes a semi-annular first ball scale 141 and is sleeved on The first readhead 142 on the first ball scale 141, the first ball scale 141 is in the plane of rotation of the power cylinder 120, and the first readhead 142 is disposed on the cylinder block of the power cylinder 120, the first ball scale 141 The two ends extend upward from the base 100, respectively, and the rotating shaft is perpendicular to the plane of the first ball scale 141. When the power cylinder 120 expands and contracts, the free plate 200 is pushed to rotate, and the top plate 300 is pushed to swing, and the upper end of the power cylinder 120 is The two-column head slides in the curved wire slot, and the power cylinder 120 itself rotates around the rotating shaft in the rotating shaft seat 130. Thereafter, the movement track of the first reading head 142 is consistent with the shape of the first ball scale 141, and the first ball grid The ruler 141 moves back and forth to generate an angular displacement signal of the rotation of the power cylinder 120. The amount of expansion and contraction of the power cylinder 120 corresponds to its own rotation angle. When the first angular displacement ball grid measures the rotation angle of the power cylinder 120, that is, the angular displacement signal, that is, The power cylinder 120 can be estimated The amount of expansion and contraction is known from the accuracy of the mounting distance of the first bracket 110, the second bracket 310, and the rotating shaft support 320 on the slot 111. When the telescopic amount and the rotational angle position of the power cylinder 120 are known, the top plate can be known. The swing angle, which is the spatial position. [0049] In order to measure the rotation angle of the rotary table 400, a second angular displacement ball grid is disposed on the top plate 300, and the second angular displacement ball grid includes a second ball scale 341 having a certain arc length and is sleeved in the second The second readhead 342 on the ball scale 341, the second ball scale 341 is located on the outer circumference of the top plate 300, and the arc range corresponding to the arc length of the second ball scale 341 corresponds to the rack 410, and may be 180°, 360. °, etc., the second reading head 342 is synchronously disposed on the rotating table 400. When the driving mechanism drives the rotating table to rotate, the second reading head 342 rotates synchronously on the second ball scale 341 to accurately collect the angular displacement of the rotating table. The rotation angle of the rotary table can be known. It can be seen that the rotary table that swings with the top plate can realize the omnidirectional spatial trajectory simulation with the 360° rotation movement, the same, the whole swing process and The rotation process is accurate and measurable, providing high-precision space trajectory simulation, improving the reliability and accuracy of the test measurement data. After the test sample is mounted on the rotary table, the required high-precision test can be performed.

[0050] The outer circumference diameter of the rack 410 is between the outer diameter of the outer surface of the top plate 300 and the outer diameter of the second ball scale 341, the rack 410 is disposed downward, and the rack 410 is located at the outer circumference of the top plate 300 to form a complete mating structure. , save space

The rack 410 can be 360° enveloped on the outer circumference of the top plate 300. Correspondingly, the corresponding 360° envelope of the second ball scale 341 is on the outer circumference of the rack 410, and the 360° free rotation of the rotating table is realized, and the angular displacement is real.吋 Accurate and measurable.

Embodiments of the invention

Embodiment 2

[0052] On the basis of the first embodiment, a slewing bearing is disposed between the lower surface of the rotating table 400 and the upper surface of the top plate 300, and the rotating table 400 and the top plate 300 are connected by a slewing bearing, so that the rotation of the rotating table 400 is further Smooth. The upper and lower portions of the slewing ring are each embedded in the rotary table 400 and the top plate 300 to reduce the lifting height of the rotary table 400 on the top plate 300.

Embodiment 3

[0054] On the basis of the first embodiment, a plurality of mounting holes for fixing the sample are arranged on the upper surface of the rotating table 400, and the positional accuracy of each mounting hole is fixed, and the sample can be installed at a specific position as needed. The mounting hole is so that the position of the sample on the rotating table can be accurately known. In the space test, the spatial motion trajectory of the sample can be accurately determined, and the measured experimental data can be used to analyze and obtain accurate detection results.

[0055] The base 100 is provided with a plurality of positioning holes matched with the mounting holes, and the first and last rotating tables 400 of the spacecraft ball grid detecting system are selectively connected to the base 100, and only the mounting holes and the positioning holes are aligned and fixed. which is Yes.

[0056] As shown in FIG. 8, the end-to-end connection of the two space-level ball grid detection systems, the respective first ball scales 141 are vertically arranged, so that the test pieces fixed on the uppermost rotating table are more oriented. The swing and rotation provide a wider range of spatial motion trajectory simulations.

[0057] As shown in FIG. 9, the head-to-tail connection of the three space-level ball grid detection systems can flexibly and variably splicing the multi-stage ball grid detection system to meet the test conditions and expand the accurate space simulation capability.

[0058] By analogy, the base of the Nth stage space ball grid detection system is connected with the top plate or the rotating table of the N-1 class space ball grid detection system to provide a larger range of space simulation test conditions. To achieve, for example

: Component testing requirements for moving parts such as ships and aircraft.

[0059] Embodiment 4

[0060] As shown in FIG. 10-11, the difference from the first embodiment is that the free plate 200 is provided with a closed wire slot 210, and the closed wire groove 210 is disposed at the outer peripheral bottom of the free plate 200, and is formed on the free plate 200. A suitable shaped closed motion slot adopting an adaptive top plate swinging operation frequency response line, the second column head sliding in the closed line slot 210, the multi-stage power cylinder is in the range of motion and drives the top plate to swing, and the free plate 200 corresponding power cylinder With the swinging process of the top plate, with the movement of the free plate 200, the "reciprocating" swing of the rotary table has no short-term switching stagnation, and the swinging process is smoother.

[0061] From the above, in the space-level ball grid detection system of the present invention, the swinging process of the top plate is smoother, the card machine phenomenon is not generated during the swinging process, the swing range of the same is larger, and the 360° can be provided. The rotation process realizes the omnidirectional spatial trajectory simulation; and the entire oscillating process and the rotational process are accurately measurable, providing a high-precision spatial trajectory simulation environment, improving the reliability and accuracy of the test measurement data, and further, multiple The aerospace-grade ball grid detection system can be spliced to complete motion trajectory simulation in a larger spatial range, providing a wider range of spatial motion test conditions.

Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments, and are fully applicable to various fields suitable for the present invention, and are familiar to those skilled in the art. The invention is not limited to the specific details and the details shown and described herein, without departing from the scope of the appended claims.

Claims

Claim

[Claim 1] A space-grade ball grid detection system, comprising:

a base, a pair of first brackets extending vertically upwardly on the two sides of the radial direction, a slot is longitudinally disposed on the first bracket, and a power cylinder is disposed in the center of the base;

The top plate has a pair of second brackets extending vertically downwardly on the two sides of the top plate, and the bottom of the second bracket is disposed on the slot through the rotation of the rotating shaft, and a free plate is disposed at a center of the bottom of the top plate. The bottom surface of the free plate is provided with a curved wire groove, and the top of the power cylinder is restricted to move in the curved wire groove;

a rotating table, which is disposed on the upper surface of the top plate with a central axis, and a mounting hole for fixing the sample is disposed on the upper surface of the rotating table;

Wherein, the base is provided with a first angular displacement ball grid, and the first angular displacement ball grid comprises a semi-annular first ball scale and a first reading head sleeved on the first ball scale. The first ball scale is in a plane of rotation of the power cylinder, and the first read head is synchronously disposed on a side wall of the power cylinder;

a second angular displacement ball grid is disposed on the top plate, and the second angular displacement ball grid includes a second ball scale having a certain arc length and a second reading head sleeved on the second ball scale The second ball scale is located on the outer circumference of the top plate, and the second read head is synchronously disposed on the rotating table.

The space-level ball grid detecting system according to claim 1 , wherein a center of the base is convexly provided with a pair of rotating shaft seats, and the height of the rotating shaft seat is not more than 10 mm, the power cylinder The bottom portion is convexly provided with a bearing with a shaft hole, and the bearing seat is rotatably supported on the rotating shaft seat by a rotating shaft, and the supporting seat is located in a gap between the two rotating shaft seats.

[Claim 3] The space-level ball grid detecting system according to claim 2, wherein the rotating shaft is fixedly fixed to the slot at any height position, and the bottom of the second bracket is rotatably disposed at The shaft is supported.

The space-level ball grid detecting system according to claim 3, wherein a center of the free upper plate is convexly provided with a first stud, and a lower end of the top center of the top plate is provided with a first a column hole, the free plate is restricted from rotating in the first column hole by the first column head, The top of the power cylinder is convexly provided with a second column head, and the second column head is restricted to slide in the curved wire groove, and the curved wire groove may be a profiled wire groove or a closed wire groove.

[Claim 5] The space-level ball grid detecting system according to claim 4, wherein a center of the lower surface of the rotating table is convexly provided with a third column head, and a center of the upper end of the top plate is correspondingly provided with a second a column hole, the rotating table is restricted from rotating in the second column hole by the third column head.

[Claim 6] The space-level ball grid detecting system according to claim 5, wherein an outer diameter of the rotating table is larger than an outer diameter of the top plate, and a lower arc end of the rotating table is provided with a certain arc length a rack having an outer peripheral diameter between the outer diameter of the top disc and a diameter of the outer circumference of the second ball scale, the rack being disposed downward, and the rack being located at an outer circumference of the top disc.

The space-level ball grid detecting system according to claim 6, wherein a driving mechanism is disposed on an outer bottom of the top plate, and a driving mechanism is disposed on the driving shaft of the driving mechanism A rack-engaging gear.

8. The space-level ball grid detection system according to claim 7, wherein the power cylinder is a multi-stage power cylinder, and the first read head is disposed on a cylinder block of the power cylinder. Both ends of the first ball scale extend upward from the base, and the rotating shaft is perpendicular to a plane where the first ball scale is located.

[Claim 9] The space-grade ball grid detecting system according to claim 1, wherein a lower surface of the rotating table and a top surface of the top plate are connected by a slewing bearing.

The space-level ball grid detecting system of claim 1 , wherein the base is provided with a plurality of positioning holes matched with the mounting holes, and the plurality of the space-level ball grids are detected. The system's first and last turning tables are selectively connected to the base.