Theodolite testing tool and testing method thereof

Abstract

The invention relates to the technical field of rotary table precision testing, and discloses a theodolite testing tool and a testing method.The tool comprises an upper circular truncated cone, a lower circular truncated cone and a plurality of stand columns located between the upper circular truncated cone and the lower circular truncated cone, upper studs are fixedly connected to the upper ends of the stand columns, and first screw grooves are formed in the bottom face of the upper circular truncated cone; the upper stud is in threaded connection with the first screw groove, the bottom end of the stand column is fixedly connected with a lower stud, a second screw groove is formed in the surface of the lower circular truncated cone, the lower stud is in threaded connection with the second screw groove, and a plurality of leveling supporting blocks are arranged at the bottom of the lower circular truncated cone. According to the invention, the mode that the theodolite is placed on the airborne turntable for direct testing can be avoided, large errors brought to the precision test of the airborne turntable are effectively prevented, and the precision test effect of the airborne turntable is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of turntable precision testing, and more specifically, to a theodolite testing tool and a testing method thereof. Background Art

[0002] The accuracy of an airborne turntable refers to the degree of accuracy that the turntable can achieve when positioning and repeating positioning. It is one of the important indicators for measuring the performance of a turntable. The accuracy of an airborne turntable is affected by many factors, including manufacturing and assembly errors, temperature changes, wear and thermal deformation. A high-precision airborne turntable is essential for achieving precision machining.

[0003] At present, when testing the accuracy of an airborne turntable, since the load of most airborne turntables is only about 0.5kg, but the weight of the theodolite is about 5kg, the load of the airborne turntable is relatively small, and the theodolite used for testing the azimuth is heavy, and the theodolite is difficult to obtain stable support. As a result, if the test is directly placed on the airborne turntable (the theodolite needs to be placed at the center of rotation), the airborne turntable is prone to deformation, which will cause a large error in its accuracy test and affect the accuracy test effect of the airborne turntable. Based on this, the present invention designs a theodolite test tool and a test method thereof to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a theodolite testing tool and a testing method thereof to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides a theodolite testing tool, comprising an upper truncated table, a lower truncated table and a plurality of columns located between the upper truncated table and the lower truncated table, wherein the upper end of the column is fixedly connected with an upper stud, the bottom surface of the upper truncated table is provided with a first screw groove, the upper stud is threadedly connected to the first screw groove, the bottom end of the column is fixedly connected with a lower stud, the surface of the lower truncated table is provided with a second screw groove, the lower stud is threadedly connected to the second screw groove, and a plurality of leveling support blocks are arranged at the bottom of the lower truncated table.

[0006] As a preferred technical solution of the present invention, the diameter of the upper cone is the same as the diameter of the lower cone, and the coaxial center of the upper cone coincides with the coaxial center of the lower cone.

[0007] As a preferred technical solution of the present invention, the number of the upright posts and the number of the leveling support blocks are both three, and the upright posts and the leveling support blocks are both distributed in a ring-shaped manner with equal spacing.

[0008] As a preferred technical solution of the present invention, an anti-skid pad is fixedly installed on the surface of the leveling support block, and the anti-skid pad is a component made of rubber.

[0009] To achieve the above and other related purposes, the present invention also provides a theodolite test tool testing method, based on the above theodolite test tool, comprising the following steps:

[0010] SP01: Place the airborne turntable on the lower round table, align its rotation center with the center of the tooling with a caliper according to the size of the airborne turntable base, and use a level meter and various leveling blocks to level the test tooling;

[0011] SP02: Use cable ties or buckles to fix the laser pen on the rotating shaft of the onboard turntable, so that the rotating shaft and the laser pen are relatively stationary;

[0012] SP03: Place the theodolite on the upper circular table, use a caliper to align the rotation center of the theodolite with the center of the tooling according to the circular edge of the theodolite, and adjust the leveling angle of the theodolite itself so that the level bubble of the theodolite is in the center;

[0013] SP04: Draw a circle in the center of an open space with a diameter of no less than 4m, and place the airborne turntable and tooling in the center;

[0014] SP05: Open the onboard turntable control software and turn on the laser pointer; rotate the onboard turntable to the 0° position and vertically place a laser baffle at the tangent position of the outer circle so that the laser can hit the laser baffle;

[0015] SP06: The theodolite searches for the laser center position, sets the theodolite angle to zero, sets the current angle as the initial value, and records it;

[0016] SP07: Rotate the airborne turntable to the position of 15°. After the airborne turntable stops rotating, move the laser baffle at the tangent position of the outer circle so that the laser can hit the laser baffle. The theodolite operator will find the laser center position with the theodolite, check the theodolite, and record it.

[0017] SP08: Rotate the onboard turntable until the angle increases by 15°, repeat the previous step, record the theodolite angle, and stop the test until the starting position is measured;

[0018] SP09: Calculate the difference x1, x2, ... xn between the equipment rotation angle deviation value (device angle value and initial value deviation) and the measured angle deviation value (measured angle value and initial instrument value deviation) at each position, where n is an integer, and record it at the turntable angle deviation. According to the root mean square formula, calculate the accuracy of the airborne turntable.

[0019] As a preferred technical solution of the present invention, the specific process of aligning the rotation center of the airborne turntable with the tooling center in SP01 includes the following steps:

[0020] SP11: If the base of the airborne turntable is circular and the center of rotation is the center of the base, use calipers to measure the normal distance of the airborne turntable base from each side of the tooling at the same time, at least three measurement points.

[0021] SP12: If the base of the airborne turntable is a special-shaped part, print out the drawing of the airborne turntable base in the same proportion using a two-dimensional drawing and draw a circle with the rotation center. The circumference of the circle should be larger than the shape of the airborne turntable base. Place the drawing on the plane of the airborne turntable and use a caliper to measure the normal distance of the circumference of the drawing from each side of the tooling. There should be at least three measurement points. Then place the airborne turntable on the base position corresponding to the drawing.

[0022] As a preferred technical solution of the present invention, the root mean square formula in SP09 is as follows:

[0023] S={[(x1-x)^2+(x2-x)^2+......(xn-x)^2] / n}^0.5

[0024] Here, X in this formula is the mean.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The invention places an airborne turntable on a lower circular table, aligns the rotation center of the airborne turntable base with a caliper according to the size of the base, and uses a level to level the test tooling with various leveling support blocks, fixes a laser pen on the rotation axis of the airborne turntable with a cable tie or a buckle, so that the rotation axis and the laser pen are relatively stationary, places a theodolite on the upper circular table, and uses various columns between the upper circular table and the lower circular table to stably support and position the tooling, thereby ensuring the structural strength of the tooling, aligns the rotation center of the theodolite with a caliper according to the circular edge of the theodolite, and adjusts the leveling angle of the theodolite itself so that the level bubble of the theodolite is in the center, thereby facilitating stable support of the theodolite, and the theodolite, the rotation centers of the airborne turntable and the tooling center are all in a coaxial state for testing, which can avoid the method of directly placing the theodolite on the airborne turntable for testing, effectively prevents a large error from being brought to the airborne turntable precision test, and improves the airborne turntable precision test effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a three-dimensional structure from a first-viewing angle of a theodolite testing tool of the present invention;

[0028] Figure 2 It is a schematic cross-sectional structure diagram of a theodolite testing tool of the present invention;

[0029] Figure 3 It is a second viewing angle structural schematic diagram of a theodolite testing tool of the present invention;

[0030] Figure 4The figure is a scene schematic diagram of a theodolite testing method of the present invention.

[0031] In the figure: 1. upper truncated table; 101. first screw groove; 2. lower truncated table; 201. second screw groove; 3. column; 301. upper stud; 302. lower stud; 4. leveling support block; 401. anti-skid pad; 5. airborne turntable. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figures 1 to 3 As shown, the present invention provides a theodolite testing tool, comprising an upper truncated table 1, a lower truncated table 2 and a plurality of columns 3 located between the upper truncated table 1 and the lower truncated table 2, the upper end of the column 3 is fixedly connected with an upper stud 301, the bottom surface of the upper truncated table 1 is provided with a first screw groove 101, the upper stud 301 is threadedly connected to the first screw groove 101, the bottom end of the column 3 is fixedly connected with a lower stud 302, the surface of the lower truncated table 2 is provided with a second screw groove 201, the lower stud 302 is threadedly connected to the second screw groove 201, and a plurality of leveling support blocks 4 are arranged at the bottom of the lower truncated table 2, and the tooling is leveled by adjusting the position of the leveling support blocks 4 at the bottom of the lower truncated table 2.

[0034] Among them, Figure 2 As shown, the diameter of the upper truncated cone 1 is the same as the diameter of the lower truncated cone 2, and the coaxial center of the upper truncated cone 1 coincides with the coaxial center of the lower truncated cone 2.

[0035] Among them, Figure 3 As shown, the number of the upright posts 3 and the number of the leveling support blocks 4 are both three, and the upright posts 3 and the leveling support blocks 4 are both distributed in a ring-like shape with equal intervals.

[0036] Among them, Figure 3 As shown, an anti-skid pad 401 is fixedly installed on the surface of the leveling support block 4. The anti-skid pad 401 is a component made of rubber, which achieves the purpose of making the leveling support block 4 have a good anti-skid effect.

[0037] like Figures 1 to 4 As shown, the present invention also provides a theodolite test tool testing method, based on the above-mentioned theodolite test tool, comprising the following steps:

[0038] SP01: Place the airborne turntable 5 on the lower circumferential table 2, align its rotation center with the center of the tooling with a caliper according to the base size of the airborne turntable 5, and use a level meter and each leveling support block 4 to level the test tooling;

[0039] SP02: Use a cable tie or buckle to fix the laser pen on the rotating shaft of the onboard turntable 5 so that the rotating shaft and the laser pen are relatively stationary;

[0040] SP03: Place the theodolite on the upper circular table 1, use a caliper to align the rotation center of the theodolite with the center of the tooling according to the circular edge of the theodolite, and adjust the leveling angle of the theodolite itself so that the level bubble of the theodolite is in the center;

[0041] SP04: Draw a circle with a center position in an open space, the diameter of the circle should not be less than 4m, and place the airborne turntable 5 and the tooling at the center position;

[0042] SP05: Open the control software of the airborne turntable 5 and turn on the laser pointer; rotate the airborne turntable 5 to the 0° position and vertically place a laser baffle at the tangent position of the outer circle so that the laser can hit the laser baffle;

[0043] SP06: The theodolite searches for the laser center position, sets the theodolite angle to zero, sets the current angle as the initial value, and records it;

[0044] SP07: Rotate the airborne turntable 5 to position 15°. After the airborne turntable 5 stops rotating, move the laser baffle at the tangent position of the circular outer circle so that the laser can hit the laser baffle. The theodolite operator will find the laser center position with the theodolite, check the theodolite, and record it.

[0045] SP08: Rotate the onboard turntable 5 until the angle increases by 15°, repeat the previous step, record the theodolite angle, and stop the test until the starting position is measured;

[0046] SP09: Calculate the equipment rotation angle deviation value at each position, the deviation between the equipment angle value and the initial value and the measured angle deviation value, the difference between the measured angle value and the initial instrument value, x1, x2, ... xn, and record it at the turntable angle deviation. According to the root mean square formula, calculate the accuracy of the airborne turntable 5.

[0047] The specific process of aligning the rotation center of the airborne turntable 5 with the tooling center in SP01 includes the following steps:

[0048] SP11: If the base of the airborne turntable 5 is circular and the center of rotation is the center of the base, use a caliper to measure the normal distance between the base of the airborne turntable 5 and each side of the tooling at the same time, at least three measurement points.

[0049] SP12: If the base of the airborne turntable 5 is a special-shaped part, print out the base drawing of the airborne turntable 5 in the same proportion using a two-dimensional drawing and draw a circle with the rotation center. The circumference of the circle should be larger than the outer shape of the base of the airborne turntable 5. Place the drawing on the plane of the airborne turntable 5 and use a caliper to measure the normal distance of the circumference of the drawing from each side of the tooling. There should be at least three measurement points. Then place the airborne turntable 5 at the base position corresponding to the drawing.

[0050] Among them, the root mean square formula in SP09 is as follows,

[0051] S={[(x1-x)^2+(x2-x)^2+......(xn-x)^2] / n}^0.5

[0052] Here, X in this formula is the mean.

[0053] The present invention places an airborne turntable 5 on the lower truncated table 2, aligns the rotation center of the airborne turntable 5 with the center of the tooling with a caliper according to the size of the base of the airborne turntable 5, uses a level to level the test tooling with each leveling support block 4, fixes the laser pen on the rotation axis of the airborne turntable 5 with a cable tie or a buckle, so that the rotation axis and the laser pen are relatively stationary, places the theodolite on the upper truncated table 1, and uses each column 3 between the upper truncated table 1 and the lower truncated table 2 for stable support and positioning to ensure the structural strength of the tooling, aligns the rotation center of the theodolite with the center of the tooling with a caliper according to the circular edge of the theodolite, adjusts the leveling angle of the theodolite itself so that the level bubble of the theodolite is in the center, thereby facilitating stable support of the theodolite, and the theodolite, the rotation center of the airborne turntable 5 and the center of the tooling are all in a coaxial state for testing, which can avoid the method of directly placing the theodolite on the airborne turntable 5 for testing, and effectively prevents a large error from being brought to the accuracy test of the airborne turntable 5.

[0054] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" 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 includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A theodolite testing tool, characterized in that: It comprises an upper truncated platform (1), a lower truncated platform (2), and a plurality of upright posts (3) located between the upper truncated platform (1) and the lower truncated platform (2); The upper end of the column (3) is fixedly connected to an upper stud (301); the bottom surface of the upper truncated platform (1) is provided with a first screw groove (101); the upper stud (301) is threadedly connected to the first screw groove (101); the bottom end of the column (3) is fixedly connected to a lower stud (302); the surface of the lower truncated platform (2) is provided with a second screw groove (201); the lower stud (302) is threadedly connected to the second screw groove (201); and a plurality of leveling support blocks (4) are provided at the bottom of the lower truncated platform (2).

2. A theodolite testing tool according to claim 1, characterized in that: The diameter of the upper truncated cone (1) is the same as the diameter of the lower truncated cone (2), and the coaxial center of the upper truncated cone (1) coincides with the coaxial center of the lower truncated cone (2).

3. The theodolite testing tool according to claim 1, characterized in that: The number of the upright posts (3) and the number of the leveling support blocks (4) are both three, and the upright posts (3) and the leveling support blocks (4) are both distributed in a ring-shaped manner with equal spacing.

4. The theodolite testing tool according to claim 1, characterized in that: An anti-skid pad (401) is fixedly mounted on the surface of the leveling support block (4), and the anti-skid pad (401) is a component made of rubber.

5. A method for testing a theodolite testing tool, according to a theodolite testing tool according to any one of claims 1 to 4, characterized in that: The following steps are involved: SP01: Place the airborne turntable (5) on the lower circumferential table (2), align the rotation center with the center of the tooling using a caliper according to the base size of the airborne turntable (5), and use a spirit level in conjunction with each leveling support block (4) to level the test tooling; SP02: Use a cable tie or buckle to fix the laser pen on the rotating shaft of the onboard turntable (5) so that the rotating shaft and the laser pen are relatively stationary; SP03: Place the theodolite on the upper circumferential table (1), use a caliper to align the rotation center of the theodolite with the center of the tooling according to the circular edge of the theodolite, and adjust the leveling angle of the theodolite itself so that the level bubble of the theodolite is in the center; SP04: Draw a circle with a center position in an open space, the diameter of the circle should not be less than 4m, and place the airborne turntable (5) and the tooling at the center position; SP05: Open the control software of the onboard turntable (5) and turn on the laser pointer; rotate the onboard turntable (5) to the 0° position and vertically place a laser baffle at the tangent position of the outer circle so that the laser can hit the laser baffle; SP06: The theodolite searches for the laser center position, sets the theodolite angle to zero, sets the current angle as the initial value, and records it; SP07: Rotate the onboard turntable (5) to a position of 15°. After the onboard turntable (5) stops rotating, move the laser baffle at the tangent position of the outer circle so that the laser can hit the laser baffle. The theodolite operator moves the theodolite to find the laser center position, checks the theodolite, and records it; SP08: Rotate the onboard turntable (5) until the angle increases by 15°, repeat the previous step, record the theodolite angle, and stop the test until the starting position is measured; SP09: Calculate the difference x1, x2, ... xn between the device rotation angle deviation value (device angle value and initial value deviation) and the measured angle deviation value (measured angle value and initial instrument value deviation) at each position, where n is an integer, and record the angle deviation at the turntable. According to the root mean square formula, the accuracy of the airborne turntable (5) can be calculated.

6. A theodolite testing tool testing method according to claim 5, characterized in that: The specific process of aligning the rotation center of the onboard turntable (5) with the tooling center in SP01 includes the following steps: SP11: If the base of the airborne turntable (5) is circular and the center of rotation is the center of the base, use a caliper to measure the normal distance between the base of the airborne turntable (5) and each side of the tooling at the same time, at least three measurement points. SP12: If the base of the airborne turntable (5) is a special-shaped part, print out the base drawing of the airborne turntable (5) in the same proportion using a two-dimensional drawing and draw a circle with the rotation center. The circumference of the circle should be larger than the outer shape of the base of the airborne turntable (5). Place the drawing on the plane of the airborne turntable (5), and use a caliper to measure the normal distance of the circumference of the drawing from each side of the tooling to be the same, at least three measurement points, and then place the airborne turntable (5) at the base position corresponding to the drawing.

7. A theodolite testing tool testing method according to claim 5, characterized in that: The root mean square formula in SP09 is as follows, S={[(x1-x)^2+(x2-x)^2+......(xn-x)^2] / n}^0.5 Here, X in this formula is the mean.

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