CN218865373U - Device for measuring axial gravity center position of underwater vehicle - Google Patents

Abstract

The utility model belongs to the technical field of measuring device, concretely relates to measure device of underwater vehicle axial focus position. The device comprises two weight measurement modules which are oppositely arranged and a gravity center position calibration module which is connected between the two weight measurement modules; each weight measuring module comprises a base, a weight sensor and a bracket which are sequentially connected from bottom to top, circular arc through grooves are concavely formed in the top surface of the bracket, and the two through grooves in the two weight measuring modules are coaxially arranged so that the underwater vehicle can be placed on the two through grooves; the gravity center position calibration module comprises a slide rail, a slide bar and a calibration fork, wherein two ends of the slide rail in the length direction are respectively connected with the two bases, the slide bar is vertically connected right above the slide rail and can reciprocate along the length direction of the slide rail, and the calibration fork is inserted into the upper part of the slide bar and can move up and down relative to the slide bar. The utility model discloses can convenient and fast ground measure and mark the axial focus position of underwater vehicle, improve measurement accuracy and measurement of efficiency.

Description

Device for measuring axial gravity center position of underwater vehicle

Technical Field

The utility model belongs to the technical field of measuring device, concretely relates to measure device of underwater vehicle axial focus position.

Background

The sea is a natural treasure house, and countless resources are contained in the sea to wait for exploration and development of human beings. With the rapid development of ocean technology in recent years, underwater vehicles including An Underwater Glider (AUG) and an underwater autonomous vehicle (AUV) are widely applied in the fields of ocean science research, submarine resource exploration, ocean resource development and utilization, ocean national defense and the like, and the market scale and the industrialization level are steadily improved.

Before these underwater vehicle sea tests, precise balancing of each underwater vehicle in a fresh water basin is required. The balancing is to ensure that the underwater vehicle has proper gravity-buoyancy difference and proper attitude angle in seawater by adjusting the gravity center, the buoyancy center, the weight and the drainage volume of the equipment. However, due to factors such as asymmetry of the internal structural design of the underwater vehicle and irregularity of the shapes of various parts, the axial center of gravity of the underwater vehicle is difficult to find manually, and the accuracy of the position of the axial center of gravity directly affects the balancing quality, thereby affecting the sea test effect of the underwater vehicle.

The traditional axial gravity center measuring method is very original, and some methods are that a round wooden stick is transversely placed under an underwater vehicle, and the gravity center is measured by manually rolling the round wooden stick; some underwater vehicles are suspended by hoisting equipment, and gravity center measurement is carried out by a method of suspending, marking and finding an intersection point for many times. These axial center of gravity measurement methods require cooperation of multiple persons, are time-consuming and labor-consuming, and have low measurement accuracy and efficiency.

SUMMERY OF THE UTILITY MODEL

To the weak point that exists among the correlation technique, the utility model provides a measure device of underwater vehicle axial focus position aims at improving the measurement accuracy and the measurement of efficiency of underwater vehicle axial focus position.

The utility model discloses a measure device of underwater vehicle axial focus position, include:

the device comprises two opposite weight measurement modules, wherein each weight measurement module comprises a base, a weight sensor and a bracket which are sequentially connected from bottom to top; the top surface of the bracket is concavely provided with a circular arc-shaped through groove, and the diameter of the through groove is larger than the outer diameter of the underwater vehicle; the two through grooves on the two weight measurement modules are coaxially arranged, so that the underwater vehicle can be placed on the two through grooves;

the centre of gravity position calibration module, the centre of gravity position calibration module includes:

the two ends of the sliding rail in the length direction are respectively connected with the two bases, and the center line of the sliding rail in the length direction is superposed with the axes of the two through grooves in the height direction; the slide rail is provided with scale marks along the length direction;

the sliding rod is vertically connected right above the sliding rail and can reciprocate along the length direction of the sliding rail;

and the calibration fork is inserted at the upper part of the sliding rod and can move up and down relative to the sliding rod.

In some embodiments, the device for measuring the axial gravity center position of the underwater vehicle further comprises a calculation module, wherein the calculation module is in communication connection with both weight sensors to read the weight measurement result of the weight sensors; and an axial gravity center position calculation program is arranged in the calculation module.

In some embodiments, a reading surface is arranged at one end of the sliding rod perpendicular to the length direction of the sliding rail, and a calibration surface which is flush with the reading surface is arranged on the calibration fork.

In some of these embodiments, the top surface of the calibration fork is circular and has a diameter that is adapted to the outer diameter of the underwater vehicle.

In some embodiments, the weight measuring module further comprises a pressure head clamped between the weight sensor and the bracket, wherein the pressure head comprises a body part, a shaft shoulder part positioned below the body part, an upper connecting shaft protruding from the top surface of the body part, and a lower connecting shaft protruding from the bottom surface of the shaft shoulder part; the upper connecting shaft is inserted in the bracket, and the lower connecting shaft is inserted in the weight sensor; the bottom surface of the shaft shoulder portion abuts against the measuring surface of the weight sensor.

In some embodiments, the weight measuring module further comprises a tray sandwiched between the ram and the bracket; a through hole is formed in the position, corresponding to the upper connecting shaft, of the tray; the top surface of tray is equipped with the spacing groove in the concave to with the bracket location on the tray.

In some embodiments, the bracket is nylon and the tray is stainless steel.

In some embodiments, two ends of the bottom surface of the slide rail in the length direction are respectively provided with a positioning block in a protruding manner, and the two bases are correspondingly provided with positioning grooves matched with the positioning blocks.

In some embodiments, the center of gravity position calibration module further comprises two locking screws, one locking screw is used for fastening the calibration fork on the slide bar, and the other locking screw is used for fastening the slide bar on the slide rail.

In some of these embodiments, the base is provided with a plurality of lightening holes spaced around its center.

Based on the technical scheme, the embodiment of the utility model provides an in the device of measurement underwater vehicle axial focus position, solved the difficult problem of traditional measurement mode underwater vehicle axial focus position location, realized that single just can convenient and fast ground measure and mark the axial focus position of underwater vehicle, improved measurement accuracy and measurement of efficiency moreover, saved manpower and materials input.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

FIG. 1 is a perspective view of the device for measuring the axial center of gravity of an underwater vehicle according to the present invention;

FIG. 2 is a front view of the device for measuring the axial center of gravity of the underwater vehicle of the present invention;

FIG. 3 is a top view of the device for measuring the axial center of gravity of an underwater vehicle according to the present invention;

FIG. 4 is a bottom view of the device for measuring the axial center of gravity of an underwater vehicle according to the present invention;

FIG. 5 isbase:Sub>A cross-sectional view A-A of FIG. 2;

FIG. 6 is a cross-sectional view B-B of the center of gravity position calibration module of FIG. 2;

FIG. 7 is a cross-sectional C-C view of the center of gravity position calibration module of FIG. 2;

FIG. 8 is a cross-sectional view taken along line D-D of FIG. 3;

fig. 9 is a schematic view of the underwater vehicle when the axial gravity center position is measured by using the present invention.

In the figure:

10. a weight measurement module; 1. a base; 11. positioning a groove; 12. lightening holes; 2. a weight sensor; 21. measuring the surface; 3. a pressure head; 31. a body portion; 32. a shaft shoulder; 33. an upper connecting shaft; 34. a lower connecting shaft; 4. a tray; 41. a limiting groove; 5. a bracket; 51. a through groove;

20. a center of gravity position calibration module; 6. a slide rail; 61. scale marks; 62. positioning a block; 7. a slide bar; 71. reading surface; 8. a calibration fork; 81. calibrating the surface; 9. locking the screw; 30. an underwater vehicle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some, not all embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "lateral", "longitudinal", "up", "down", "top", "bottom", "inner", "outer", "left", "right", "front", "rear", "vertical", "horizontal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

As shown in fig. 1-9, the device for measuring the axial center of gravity of the underwater vehicle 30 of the present invention is used for measuring and calibrating the axial center of gravity of the underwater vehicle 30 to be measured. The device comprises two opposite weight measurement modules 10 and a gravity center position calibration module 20 connected between the two weight measurement modules 10.

Each weight measurement module 10 comprises a base 1, a weight sensor 2 and a bracket 5 which are sequentially connected from bottom to top, and the bracket 5, the weight sensor 2 and the base 1 are arranged in an up-down centering manner. The base 1 is a bottom support unit of the weight measurement module 10; the weight sensor 2 is a weight measuring unit, which is connected with the base 1 by bolts and is used for measuring the weight value born by the weight measuring module 10. The top surface of the bracket 5 is concavely provided with a circular arc-shaped through groove 51, and the diameter of the through groove 51 is larger than the outer diameter of the underwater vehicle 30 to be measured; the two through grooves 51 of the two weight measuring modules 10 are coaxially arranged so that the underwater vehicle 30 to be tested can be stably placed on the two through grooves 51 even if the axis of the underwater vehicle 30 to be tested and the axes of the two through grooves 51 coincide with each other in the height direction.

The gravity center position calibration module 20 comprises a slide rail 6, a slide bar 7 and a calibration fork 8. Two ends of the slide rail 6 in the length direction are respectively connected with the two bases 1, and the length direction of the slide rail 6 is parallel to the axial direction of the two through grooves 51; further, the center line of the slide rail 6 in the length direction and the axes of the two through grooves 51 coincide with each other in the height direction, that is, the slide rail 6 is located on the line connecting the centers of the two weight measuring modules 10, so that the distance between the centers of the two bases 1 becomes a certain value; the slide rail 6 is also provided with scale marks 61 along the length direction, and any point on the central connecting line of the two bases 1 can be accurately positioned through the scale marks 61. The sliding rod 7 is vertically connected right above the sliding rail 6 and can reciprocate along the length direction of the sliding rail 6; the relative position of the sliding rod 7 on the sliding rail 6, i.e. the distance of the sliding rod 7 relative to the centers of the two bases 1, can be easily identified or positioned by the scale marks 61 on the sliding rail 6. Further, the cross section of the slide rail 6 is i-shaped, the bottom end of the slide rod 7 is provided with a slide groove, and the slide groove is clamped on the i-shaped upper section of the slide rail 6 in a claw shape so as to realize the sliding connection between the slide groove and the slide rail 6. The calibration fork 8 is inserted at the upper part of the sliding rod 7 and can move up and down relative to the sliding rod 7; specifically, the upper part of the sliding rod 7 is provided with a vertical accommodating groove matched with the section of the rod part of the calibration fork 8, so that the calibration fork 8 can be inserted in the accommodating groove and can move up and down along the vertical direction.

In addition, the gravity center position calibration module 20 and the two weight measurement modules 10 are detachably connected, and all the components of the weight measurement modules 10 and all the components of the gravity center position calibration module 20 are detachably connected, so that the components can be disassembled and assembled according to actual conditions, and the components can be stored and stored more conveniently.

The principle of using the device for measuring and calibrating the axial gravity center position of the underwater vehicle 30 to be measured is described below with reference to fig. 9.

Connecting the gravity center position calibration module 20 with the two weight measurement modules 10 to form a whole set of device for measuring the axial gravity center position of the underwater vehicle 30; at this time, the center distance between the two weight measurement modules 10 is a known value, and is denoted as L;

after the underwater vehicle 30 to be measured is placed on the two brackets 5 of the two weight measurement modules 10, the two weight sensors 2 automatically measure the respective weight values, which are respectively marked as T1 and T2;

the horizontal distances between the axial gravity center of the underwater vehicle 30 to be measured and the centers of the two weight measurement modules 10 are respectively assumed as S1 and S2, and it can be understood that S1+ S2= L; according to the principle of balance between force and moment, S1 × T1= S2 × T2; wherein, L, T1 and T2 are known values, and S1 and S2 are values to be solved; from the two equations above, S1= T2 × L/(T1 + T2), S2= T1 × L/(T1 + T2); thus, the horizontal distance between the axial gravity center of the underwater vehicle 30 to be measured and the centers of the two weight measurement modules 10 is obtained, and at the moment, the theoretical position of the axial gravity center of the underwater vehicle 30 to be measured can be determined;

finding a corresponding scale mark 61 on the slide rail 6 according to the calculated theoretical position of the axial gravity center of the underwater vehicle 30 to be measured, and moving the slide rod 7 to enable the slide rod to reach the position of the scale mark 61; then vertically moving the calibration fork 8 upwards until the calibration fork 8 is contacted with the outer contour of the underwater vehicle 30 to be tested; and finally, marking the intersection point of the calibration fork 8 and the underwater vehicle 30 to be tested on the outer contour surface of the underwater vehicle 30 to be tested by using a marker pen, namely the position of the axial gravity center of the underwater vehicle 30 to be tested, so that the measurement and calibration of the axial gravity center position of the underwater vehicle 30 to be tested are realized.

According to the illustrative embodiment, the two weight measurement modules 10 and the gravity center position calibration module 20 between the two weight measurement modules are arranged, so that the axial gravity center position of the underwater vehicle 30 can be conveniently and quickly measured and calibrated by a single person, the measurement precision and the measurement efficiency are improved, and the manpower and material resource investment is saved.

In some embodiments, the means for measuring the position of the axial center of gravity of the underwater vehicle 30 further comprises a calculation module communicatively connected to both weight sensors 2 for reading the weight measurements thereof; and an axial gravity center position calculation program is arranged in the calculation module. Usually, the calculation module is integrated in a computer, the center distance L of the two weight measurement modules 10 is stored in the calculation module in advance, after the calculation module reads the measurement results T1 and T2 of the two weight sensors 2, the calculation module can automatically calculate the horizontal distances S1 and S2 between the axial gravity center position of the underwater vehicle 30 to be measured and the centers of the two weight measurement modules 10 according to a built-in axial gravity center position calculation program, namely, the theoretical position of the axial gravity center of the underwater vehicle 30 to be measured is determined, the measurement efficiency is further accelerated, and errors caused by manual calculation are avoided.

As shown in fig. 2 and referring to fig. 9, in some embodiments, a reading surface 71 is provided on one end of the sliding rod 7 perpendicular to the length direction of the sliding rail 6, and a calibration surface 81 flush with the reading surface 71 is provided on the calibration fork 8. Further, after the calculated theoretical position of the axial center of gravity of the underwater vehicle 30 to be measured is found and the corresponding scale mark 61 is found on the slide rail 6, the slide rod 7 is moved to enable the reading surface 71 on the slide rod 7 to be aligned with the position of the scale mark 61, so that the calibration surface 81 on the calibration fork 8 can be aligned with the position of the scale mark 61, that is, the calculated theoretical position of the axial center of gravity of the underwater vehicle 30 to be measured is accurately and reliably transmitted to the calibration surface 81, then the calibration fork 8 is vertically moved upwards, and the axial center of gravity position of the underwater vehicle 30 to be measured can be accurately marked by using the calibration surface 81 of the calibration fork 8.

As shown in fig. 1, 6 and 7 and referring to fig. 9, in some embodiments, the top surface of the calibration fork 8 is circular arc-shaped, and the diameter of the top surface is adapted to the outer diameter of the underwater vehicle 30 to be measured; further, the axis of the calibration fork 8 and the axes of the two through grooves 51 are overlapped with each other in the height direction, so that the axis of the calibration fork 8 and the axis of the underwater vehicle 30 to be measured are overlapped, and the accuracy of calibrating the axial gravity center position of the underwater vehicle 30 to be measured by using the calibration fork 8 is improved.

As shown in fig. 2, 5 and 8, in some embodiments, the weight measuring module 10 further includes a pressing head 3 interposed between the weight sensor 2 and the bracket 5, the pressing head 3 and the weight sensor 2 are vertically aligned. The pressing head 3 specifically comprises a body part 31, a shaft shoulder part 32 positioned below the body part 31, an upper connecting shaft 33 protruding from the top surface of the body part 31, and a lower connecting shaft 34 protruding from the bottom surface of the shaft shoulder part 32; the body portion 31, the shoulder portion 32, the upper connecting shaft 33, and the lower connecting shaft 34 are coaxially disposed. The upper connecting shaft 33 is inserted into the bracket 5, and a nut (not shown) is connected to the top of the upper connecting shaft 33 to lock the bracket 5 and the ram 3 to each other. The lower connecting shaft 34 is inserted into the weight sensor 2, and a nut (not shown) is connected to the top of the upper connecting shaft 33 to lock the weight sensor 2 and the ram 3 to each other. It will be appreciated that the ram 3 is securely connected and positioned between the weight sensor 2 and the bracket 5 by the provision of the upper connecting shaft 33 and the lower connecting shaft 34. The bottom surface of the shaft shoulder 32 abuts on the measurement surface 21 of the weight sensor 2. The ram 3 is a weight transfer unit that reliably transfers the weight borne by the weight measuring module 10 to the weight sensor 2 through the shaft shoulder 32.

As shown in fig. 2, 5 and 8, in some embodiments, the weight measuring module 10 further includes a tray 4 interposed between the ram 3 and the bracket 5, the tray 4 and the ram 3 are vertically aligned. The tray 4 is provided with a through hole corresponding to the upper connecting shaft 33 of the pressure head 3, and the upper connecting shaft 33 of the pressure head 3 passes through the through hole to be inserted into the bracket 5. The bottom surface of the tray 4 is pressed on the top surface of the body part 31 of the pressure head 3; a limiting groove 41 is concavely arranged on the top surface of the tray 4 so as to accurately position the bracket 5 on the tray 4; the tray 4 is connected with the bracket 5 through bolts.

In some embodiments, bracket 5 is nylon and tray 4 is stainless steel. The stainless steel tray 4 has higher strength, and the integral structural strength and pressure resistance of the device are improved; the nylon bracket 5 in direct contact with the underwater vehicle 30 to be measured is made of a relatively soft material, so that the underwater vehicle 30 to be measured is prevented from being damaged during measurement.

As shown in fig. 4 and 8, in some embodiments, two ends of the bottom surface of the slide rail 6 in the length direction are respectively provided with a positioning block 62 in a protruding manner, and the two bases 1 are correspondingly provided with positioning grooves 11 adapted to the positioning blocks 62. The positioning block 62 may be rectangular in shape but is not limited thereto. Through the matching arrangement of the positioning block 62 and the positioning groove 11, the relative position between the slide rail 6 and the two bases 1 is ensured to be kept unchanged, and further the precision of the axial gravity center position measurement and calibration is ensured.

As shown in fig. 2, 6 and 7, in some embodiments, the center of gravity position calibration module 20 further includes two locking screws 9, one locking screw 9 is used for fastening the calibration fork 8 to the slide bar 7, and the other locking screw 9 is used for fastening the slide bar 7 to the slide rail 6. Further explaining, after the theoretical position of the axial gravity center of the underwater vehicle 30 to be measured is calculated, the scale mark 61 corresponding to the position is found on the slide rail 6, the slide rod 7 is firstly moved to enable the reading surface 71 to be aligned with the position of the scale mark 61, and the slide rod 7 is tightly fixed on the slide rail 6 by using a locking screw 9 to prevent the slide rod 7 from moving; then moving the calibration fork 8 upwards until the calibration fork 8 is contacted with the outer contour of the underwater vehicle 30 to be tested, and fastening the calibration fork 8 on the slide rod 7 by using another locking screw 9 to prevent the calibration fork 8 from moving; and finally, marking the axial gravity center position on the outer contour surface of the underwater vehicle 30 to be measured by utilizing the calibration surface 81 of the calibration fork 8.

As shown in fig. 4, in some embodiments, a plurality of lightening holes 12 are formed in the base 1 at intervals around the center thereof to reduce the weight of the base 1, thereby facilitating the use and operation of a single person.

To sum up, the utility model discloses a measure device of underwater vehicle axial focus position, simple structure, use convenient, the practicality is strong, single can the operation, can measure and mark the axial focus position of underwater vehicle in very short time, improved axial focus's measuring accuracy and measurement of efficiency, saved manpower and materials input.

Finally, it should be noted that: the embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (10)

1. An apparatus for measuring the position of the axial center of gravity of an underwater vehicle, comprising:

the device comprises two oppositely arranged weight measurement modules, wherein each weight measurement module comprises a base, a weight sensor and a bracket which are sequentially connected from bottom to top; the top surface of the bracket is concavely provided with a circular arc-shaped through groove, and the diameter of the through groove is larger than the outer diameter of the underwater vehicle; the two through grooves on the two weight measurement modules are coaxially arranged, so that the underwater vehicle can be placed on the two through grooves;

the centre of gravity position calibration module, the centre of gravity position calibration module includes:

the two ends of the sliding rail in the length direction are respectively connected with the two bases, and the center line of the sliding rail in the length direction is overlapped with the axes of the two through grooves in the height direction; the slide rail is provided with scale marks along the length direction;

the sliding rod is vertically connected right above the sliding rail and can reciprocate along the length direction of the sliding rail;

and the calibration fork is inserted at the upper part of the sliding rod and can move up and down relative to the sliding rod.

2. The device for measuring the axial center of gravity of an underwater vehicle of claim 1, further comprising a computing module communicatively connected to both of the weight sensors for reading the weight measurements thereof; and an axial gravity center position calculation program is arranged in the calculation module.

3. The device for measuring the axial center of gravity of an underwater vehicle as claimed in claim 1, wherein a reading surface is provided on one end of the sliding rod perpendicular to the length direction of the sliding rail, and a calibration surface flush with the reading surface is provided on the calibration fork.

4. The device for measuring the axial center of gravity of an underwater vehicle as claimed in claim 1, wherein the top surface of the calibration fork is circular arc-shaped and has a diameter adapted to the outer diameter of the underwater vehicle.

5. The device for measuring the axial center of gravity of an underwater vehicle as claimed in claim 1, wherein the weight measuring module further comprises a pressure head interposed between the weight sensor and the bracket, the pressure head comprising a body portion, a shoulder portion located below the body portion, an upper connecting shaft protruding from a top surface of the body portion, and a lower connecting shaft protruding from a bottom surface of the shoulder portion; the upper connecting shaft is inserted in the bracket, and the lower connecting shaft is inserted in the weight sensor; the bottom surface of the shaft shoulder portion abuts against the measuring surface of the weight sensor.

6. The device for measuring the axial center of gravity of an underwater vehicle as claimed in claim 5, wherein the weight measuring module further comprises a tray interposed between the ram and the bracket; a through hole is formed in the position, corresponding to the upper connecting shaft, of the tray; the top surface of tray is equipped with the spacing groove in the pit to with the bracket is located on the tray.

7. The device for measuring the axial center of gravity of an underwater vehicle as claimed in claim 6, wherein the bracket is made of nylon and the tray is made of stainless steel.

8. The device for measuring the axial center of gravity of an underwater vehicle as claimed in claim 1, wherein a positioning block is respectively protruded from each end of the bottom surface of the slide rail in the length direction, and positioning grooves adapted to the positioning blocks are correspondingly formed on the two bases.

9. The device for measuring the axial gravity center position of an underwater vehicle according to claim 1, wherein the gravity center position calibration module further comprises two locking screws, one of the locking screws is used for fastening the calibration fork on the slide rod, and the other locking screw is used for fastening the slide rod on the slide rail.

10. The device for measuring the axial center of gravity of an underwater vehicle as claimed in claim 1, wherein the base is provided with a plurality of lightening holes spaced around the center thereof.

Images