KR100844927B1 - Horizontal type of 3-dimensional weight measurement apparatus for cylindrical missile - Google Patents

Abstract

A horizontal type three-dimensional weight characteristics measuring apparatus for a guided missile is provided to remove a danger of explosion of the guided missile due to overthrow, and to measure three-dimensional weight center and weight data about various types of products. A horizontal type three-dimensional weight characteristics measuring apparatus for a guided missile comprises a base support(1), two fixing supports(2), two hydraulic cylinder blocks(3), three load cell blocks(4), two roller blocks(5) and a surface position adjusting device(6). The base support is long in right and left directions. The two fixing supports are respectively mounted in an upper part of right and left sides of the base support, and adjust a horizontal level. The two hydraulic cylinder blocks are respectively coupled to the right and left fixing supports, and include a hydraulic cylinder capable of adjusting lifting height. One of the three load cell blocks is install on the upper part of the left fixing support, and the others on the upper part of the right fixing support. The two roller blocks, in which two rotary rollers are disposed in parallel, are mounted on the upper part of the right and left hydraulic cylinder blocks. The surface position adjusting device is coupled to right and left roller blocks and adjusts back/forth and right/left positions of each roller placed in the roller blocks.

Description

Horizontal Type of 3-Dimensional Weight Measurement Apparatus for Cylindrical Missile}

1 is an assembly view of the horizontal three-dimensional weight characteristics measuring device for the inventors guided coal;

2 to 4 are a front view, a plan view and a right side view of the measuring device of FIG. 1, respectively;

5 is a view showing a ball contact method between the load cell block and the roller block and the height adjustment method of the load cell block,

6 is a view showing a lifting height adjustment method of the hydraulic cylinder block,

7 is a view showing a method of adjusting the position of the roller and the rotation and stop of the roller in the roller block,

8 is a view showing the configuration and position adjustment method of the planar position adjusting device,

9 is a conceptual diagram showing the principle of position guided missile measurement of the scope assembly;

10 is a view showing a state where the missile is mounted on the measuring device of FIG.

11 is a conceptual diagram showing the principle of measuring the weight and center of gravity of the missile.

** Description of symbols for the main parts of the drawing **

1: foundation support

2: fixed support

3: hydraulic cylinder block

4: load cell block

5: roller block

6: flat position adjusting device

7: Roller block connector

8: scope assembly

12: cylinder block adjusting device

13: weight indicator

14: level gauge

The present invention is a device for measuring the weight of the missile. That is, the present invention relates to an apparatus for acquiring accurate gravimetric data such as a center of gravity in three axes (axial, horizontal, and vertical directions) for guided missiles having complicated internal and external shapes and irregular weight distribution.

In order to accurately predict and evaluate the flight performance of guided missiles, the use of accurate weight characteristics data such as 3D center of gravity (C.G) and weight is essential. In general, when calculating the weight characteristic data according to the theoretical method, if the internal and external shape of the missile is complicated or there is a moving object inside, the model is simplified to reduce the time and cost required for the analytical model. The weight characteristic values give different results than the actual ones, and as a result, accuracy or reliability cannot be guaranteed. Therefore, in most cases, the weight characteristic value for the missile is obtained based on an experimental method, and when the weight characteristic of the missile is experimentally derived, the precision of the experimental value depends on the measurement error.

Space electronics' KGR-1500 weight characteristics measuring equipment is composed of spherical gas bearing, support base, and measuring device fixing device. Calculate the center of gravity with the measured value of generated force by. This equipment is capable of high-precision center of gravity measurement, but requires a separate weighing equipment. The equipment is very expensive and the measuring range is less than 2200 kgf, so it cannot be used universally for various types of missiles. In addition, if the size of the measured product is large, a suitable device must be manufactured accordingly, and there is a risk of overturning missiles due to an upright installation, which raises a safety issue for missiles.

An object of the present invention, which was devised to solve the above problems, enables high precision measurement while eliminating the explosion risk of guided missiles due to overturning, and experimentally analyzes three-dimensional weight center and weight data for various types of measurement products. To measure and provide.

The present invention for achieving the above object is to improve the measurement accuracy by using a precision horizontal level control system and a horizontal level gauge, high-precision weight indicator and ball contact load cell. The precision leveling system consists of a hydraulic elevating height adjusting device, a mechanical leveling device attached to the load cell, a precision leveling level, an upper roller block and a fixed support. In addition, it is equipped with a rotating mechanism for measuring 3D center of gravity, equipped with a roller stop device for guided missile protection, a mechanical load cell height adjusting device for horizontal installation of guided missiles, a hydraulic height adjusting device for protecting load cells, and a sighting scope for specimen positioning. It has the characteristics to improve safety and work efficiency.

The horizontal three-dimensional weight characteristics measuring device for guided missile of the present invention is a base support having a predetermined width, long in the left and right directions, mounted on the left and right upper portions of the foundation support, respectively, two fixed supports, left and Two hydraulic cylinder blocks, each of which is coupled to a fixed support on the right side and includes a hydraulic cylinder that is capable of adjusting the lifting and lowering height, one is installed on the upper side of the left fixed support, and two are installed on the upper side of the right fixed support. Load cell blocks, mounted on top of the hydraulic cylinder blocks on the left and right sides, and the two rotary rollers are joined to the roller blocks on the left and right sides, respectively, with two rotary rollers placed parallel to each other at regular intervals On the left roller block and the planar positioning device to adjust the horizontal position of each roller placed on the block. Sum and is configured to include the possible sight assembly coordinates control 3d.

Hereinafter, the configuration of the present invention with reference to the drawings in detail.

1 is an assembly view of a horizontal three-dimensional weight characteristics measuring apparatus for guided missiles of the present invention, Figures 2 to 4 are respectively a front view, a plan view and a right side view of the measuring device of FIG.

Two fixed supports (2) are installed on the left and right sides of the base support (1) capable of adjusting the horizontal plane in order to configure the precision level of the measuring device. Two hydraulic cylinder blocks 3 having four lifting control hydraulic cylinders are installed on the left and right sides on the upper horizontal surface of the fixed support 2. In addition, on the upper horizontal surface of the fixed support (2), a load cell block (4) including a load cell of ball contact type and the height of the load cell is adjustable is installed, one on the left fixed support and two on the right fixed support. All three are installed. On the left and right side of the hydraulic cylinder block 3, left and right roller blocks 5 are rotatable around the guided coal body shaft. A planar position adjusting device 6 for adjusting the front, rear, left and right positions of the roller block 5 is mounted, and the two roller blocks 5 are connected by the roller block connecting device 7 and made into an assembly of one body.

5 is a view showing a ball contact method between the load cell block 4 and the roller block 5 and a height adjustment method of the load cell block 4.

Rotating the lower handle 43 moves the load cell support 42 connected to the screw 44 up and down, thereby adjusting the height of the load cell 41 coupled thereon. The upper end of the load cell block 4 is equipped with a ball bearing 45 to contact the lower part of the roller block 5 in a ball contact manner so that the load of the roller block 5 and the bullet is transferred to the load cell 41. do.

Through this structure, it is possible not only to safely install guided missiles during the installation and position movement of the measuring missile, but also to precisely adjust the horizontal level of the roller block 5 on which the bullets are installed, and not to load the impact load to the load cell 41. Do not

6 is a view showing a lifting height adjustment method of the hydraulic cylinder block (3).

When the pressure of the hydraulic control cylinder 31 is added or reduced, the heights of the four lifting cylinders 32 located on the flat plate attached to the upper portion of the hydraulic control cylinder 31 are adjusted so that the roller block placed on the top of the hydraulic cylinder block 3 ( By moving 5) up and down, the distance between the roller block 5 and the load cell block 4 can be smoothly adjusted.

The hydraulic cylinder block (3) is a load cell (impact load) may be generated when the bullet is installed by adjusting the height of the elevating cylinder (32) so that the upper roller block (5) and the load cell (41) do not come in contact with the bullet. 41), and after the bullet is installed in the upper roller block 5, by adjusting the height of the elevating cylinder 32, the upper roller block 5 and the load cell 41 in a soft point contact manner Has the ability to connect.

At this time, the cylinder height is adjusted while adjusting the pressure in the hydraulic pressure control cylinder 31 of the hydraulic cylinder block 3 using the cylinder block control device 12 (see FIG. 1).

FIG. 7 is a diagram showing a method of adjusting the position of the roller 51 and the rotation and stoppage of the roller in the roller block 5.

After measuring the center of gravity in the x-y plane and the center of gravity in the horizontal plane (y-axis), the guided coal must be rotated 90 degrees to measure the center of gravity in the height (z-axis) direction. At this time, in order to increase the safety of guided missiles, 3D center of gravity measurement convenience, and measurement accuracy, left and right roller blocks (5) rotatable about the guided missile shaft are installed, and the two roller blocks (5) are left and right sides. Mounted on top of the hydraulic cylinder block (3), each of the two rotary rollers 51 are placed in parallel in the left and right direction at regular intervals from each other.

The roller block 5 includes an apparatus for stopping the rotation of the roller 51. The roller stopper has a function of preventing the rotation of the shot when installing the guided coal in the roller block 5, and has a function of accurately installing the specimen in the circumferential direction. In order to eliminate the complexity of tightening and disassembling the specimen, push the lever 53 made by one-touch toggle method and place it vertically.The roller stop clamp 52 pushes the roller 51 to prevent the rotation of the roller. do.

8 is a view showing the configuration and position adjustment method of the planar position adjusting device (6).

In order to improve measurement accuracy, not only the height of the roller block 5 can be adjusted while the guided missile is placed, but also the two axes (x, y-axis) positions of the roller block 5 must be arbitrarily adjusted. In order to perform this function, the roller block 5 is provided with a flat position adjusting device 6 capable of adjusting front, rear, left and right positions, and a reference point indicator (not shown) is attached so that the bullet is installed at the correct position when the position is adjusted.

When the missile is placed on the roller block 5, the missile is always placed symmetrically, and the weight of the missile and the roller block is designed to be transmitted to the load cell block 4 together. At this time, the accuracy of the measurement result is the highest when the weight of guided coal and roller block is transferred from the center of the load cell to the load cell with the compressive load. It is designed. The planar position adjusting device 6 finely positions the roller block 5 in which the guided missiles are positioned so that the center axis of the guided missiles is located at the axis centerline of the measuring device including the load cell or at an arbitrary reference point in the axial length of the missiles. I can regulate it. The planar positioning device 6 includes a ball caster 63 in contact with the side of the roller block 5, a screw shaft 62 coupled to the ball caster 63, a screw support 61 supporting the screw shaft 62, and Ball-type screw-type adjusting device is provided with a control handle 64 fixedly coupled to the screw shaft (62). The adjustment handle 64 is used to adjust the fine position of the screw shaft 62 and the ball caster 63, and accordingly adjust the roller block 5 front and rear and left and right, and ultimately adjust the positions of the x and y axes of the missile. It can be adjusted accurately.

The roller block connecting device 7 shown in FIG. 1 serves to connect the left and right roller blocks 5 to each other to form an assembly of a body, and thereby the hydraulic cylinder block 3 or the load cell block 4. It is possible to adjust the horizontal level of the upper roller block (5) on which guided missiles are mounted by using the height adjustment device of the.

The level gauge 14 is attached to the roller block plane 54 for adjusting the horizontal state of the missile placed on the roller block 5 (see FIG. 7).

The scope assembly 8 is an apparatus for precisely measuring the center of gravity of the guided missile in the x-axis direction, and its purpose is to measure the coordinate reference point of the guided missile and the relative position of the load cell 41. In general, guided missiles have their own position information, which is a station, and some of these specific positions serve as a reference during the manufacturing and assembly process, and in the present invention, reference points for measuring the relative positions of the load cells and guided missiles are used.

The sight assembly 8 is attached with an indicator with a sharp tip to obtain accurate positional information about the workpiece. In addition, the side of the scope assembly is attached to the self-calibrable length, the scope of the scope is attached to the rail assembly so that the center of the scope can move from side to side along the x-axis (the length of the grenade), the center of the scope is a specific position of the missile The movement can be adjusted to fit.

9 is a conceptual diagram illustrating the principle of position guided missile measurement of the scope assembly 8. Align the indicator tip of the sight assembly with an arbitrary baseline of the missile and read the position to get the x1 value on the x-axis to find the relative position to the load cell, as well as the relative position data with the rest of the load cell. . The rest of the load cell positions were set during the fabrication of the entire weight measuring device, and the length tolerances in the axial and transverse directions were allowed within 0.01 mm.

In order to eliminate the error of the measuring instrument, a specially manufactured digital weight indicator 13 was installed instead of an analog weight indicator (see FIG. 1), and the weight values detected by the three load cells 41 were added to the weight indicator. Numbers were displayed. These three weight values are used to determine the weight of the entire guided missile, as well as the three-dimensional center of gravity of the coal together with the position values of the three load cells.

In order to increase the reliability of the measurement results, the load cell 41 and the weight indicator 13 used specially manufactured products and were calibrated by an authorized institution. The height adjusting device is installed on the base support and the fixed support to remove the agitation of the measuring device, which may cause errors in the measurement of the weight characteristics. In addition, the ball bearing is installed on the contact surface of the roller block 5 and the load cell block 4 so that the weight is always transmitted to the load cell 41 in the vertical direction. . The level gauge used to adjust the horizontal plane of the base support and the bullet holder was purchased and used commercially, and it was calibrated by an authorized agency and checked for accuracy before attaching to the developed product.

Hereinafter, the process of obtaining the weight and the center of gravity using the apparatus will be described. FIG. 10 is a view illustrating a state in which a missile is mounted on the measuring apparatus of FIG. 1. FIG.

First, the shot is placed on the roller 51 of the roller block 5 and the front and rear left and right positions of the roller block 5 are aligned using the planar position adjusting device 6, and then the height adjusting device of the load cell block 4 is adjusted. The roller block 5 is leveled. Next, the contact between the load cell block 4 and the roller block 5 is separated using the cylinder block adjusting device 12, and then the weight indicator 13 is zeroed.

After the guided coal is separated from the roller block 5, the roller block 5 is brought into contact with the load cell 41 again. At this time, each weight detected at the three load cells is read and recorded on the weight indicator (13). At this time, only the weight of the roller block 5 is measured. Next, the guided coal is placed on the roller block 5 and the combined weights of the combined weights of the guided coal and the roller block 5 in the three load cells 41 and the weight indicator 13 are measured again. By subtracting the weight of the roller block 5 from the total weight, the weight of pure coal is obtained in three load cells 41. Finally, using these compensation values and the position values of the three load cells, the center of gravity is obtained.

The above is a method for determining the weight and center of gravity on the x-y plane, and the weight and center of gravity on the x-z plane can be obtained by rotating the bullet 90 degrees and repeating the above procedure.

11 is a conceptual diagram illustrating the principle of measuring the weight and the center of gravity of the missile, and the principle of obtaining the center of gravity of the missile is as follows.

In general, the information required to determine the center of gravity in a two-dimensional plane for a certain object is the weight value measured in three load cells 41 perpendicular to the same plane and the position between each load cell. For example, when the length of the guided missile is defined as the x-axis and the horizontal direction is defined as the y-axis, the measured values of three weight cells and three load cells, respectively, are measured at three load cells (a, b, and c). Knowing (L1, L2, L3), we can find the centers of gravity Xcg and Ycg on the horizontal plane. In other words,

W = W1 + W2 + W3,

Xcg = (W1 + W2) x L1 / W,

Ycg = (W3 x L3-W2 x L2) / W

Here, W is the total weight and W1, W2 and W3 are the weights measured at the load cell A, B and C positions, respectively.

In the present invention, in order to simplify the machining process and increase the precision, the lengths of L2 and L3 are designed to be the same. That is, three load cell blocks 4 are installed at the center of the width of the base support 1 in the upper part of the left fixed support 2, and are symmetrically placed in the width direction of the base support in the upper part of the right fixed support 2. You can have a dog installed. The vertical direction Zcg is obtained by rotating the guided missile 90 degrees to make the x-z plane horizontal and then finding the center of gravity on the x-y plane.

As described above, the present inventors provide a horizontal three-dimensional weight characteristics measuring apparatus for guided missiles, which provides weight characteristics data necessary for the development of advanced precision missiles measured by applying a technology of a different concept from the conventional missile weighing apparatus. The present invention improves measurement accuracy by using a precision horizontal level control system, a horizontal level gauge, a high precision weight indicator, and a ball contact load cell.

In addition, it is equipped with a rotating mechanism for measuring 3D center of gravity, equipped with a roller stop device for guided missile protection, a mechanical load cell height adjusting device for horizontal installation of guided missiles, a hydraulic height adjusting device for protecting load cells, and a sighting scope for specimen positioning. Improved safety and work efficiency.

Claims (3)

In the device for measuring the weight characteristics of missiles having complex internal and external shapes and irregular weight distribution, A foundation support having a predetermined width and long in a lateral direction; Two fixed supports respectively mounted on the upper left and right sides of the base support and capable of leveling horizontally; Two hydraulic cylinder blocks coupled to the fixed supports on the left and right sides, the hydraulic cylinder including a hydraulic cylinder capable of raising and lowering height; One load is installed on the upper left fixed support, two are installed on the upper right fixed support, and three load cell blocks including a load cell; Two roller blocks mounted on top of the left and right hydraulic cylinder blocks, each of which has two rotary rollers disposed parallel to each other at a predetermined interval from each other; A planar position adjusting device coupled to the left and right roller blocks to adjust the front, rear, left and right positions of each roller placed on the roller block; Horizontal three-dimensional weight characteristics measurement device for guided missiles including. The method of claim 1, The load cell block is provided with a ball bearing on the upper portion of the horizontal three-dimensional weight characteristics measuring device for guided coal, characterized in that the ball contact with the roller block. The method according to claim 1 or 2, The roller block comprises a roller stop device having a roller stop clamp to prevent the rotation of the roller horizontal three-dimensional weight characteristics measuring device for missiles.

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