Inertial navigation product positioning precision testing device

Abstract

The utility model relates to the technical field of inertial navigation, and discloses an inertial navigation product positioning precision testing device which comprises a heat preservation shell and a clamping seat, the clamping seat is fixedly arranged on the inner wall of the middle of the bottom end of the heat preservation shell, a clamping groove is formed in the surface of the clamping seat, and a damping rubber mat is arranged in the clamping groove. The inner walls of the two sides of the heat preservation shell are each provided with a heating assembly, one side of the heat preservation shell is connected with a cooling assembly through a cold conduction copper plate, and the other side of the heat preservation shell is connected with a dustproof pipe through a pressure difference eliminating pipe. The bottom of the inertial navigation product can be limited through the clamping base and the clamping groove, horizontal displacement of the inertial navigation product can be prevented, the threaded cover is screwed, the pressing rod at the bottom end of the threaded cover can limit the top end of the inertial navigation product through the pressing plate, and the damping film can improve the fitting degree and stability between the pressing plate and the inertial navigation product; the damping rubber mat is matched to provide buffering and damping for the inertial navigation product.

Description

Technical Field

[0001] The utility model relates to the technical field of inertial navigation, in particular to a positioning accuracy testing device for an inertial navigation product. Background Art

[0002] Inertial navigation is an autonomous navigation method that uses two inertial sensors, gyroscopes and accelerometers, to measure the acceleration and angular velocity of the ship. By measuring the acceleration (inertia) of the aircraft and automatically performing integration operations, the aircraft's instantaneous speed and position data can be obtained.

[0003] Its application number is "202123332289.1" and discloses a "positioning accuracy assessment system based on inertial navigation", which "comprises an inner casing, a mounting seat is provided inside the inner casing, an inertial positioning measurement component is fixedly connected to the upper end of the mounting seat, and the two inner side walls on the opposite sides of the inner casing are fixedly connected to temperature control covers, and the interiors of the two temperature control covers are respectively fixed with electric heating plate assemblies and cooling plate assemblies, and ventilation holes are provided at the upper and lower ends of the two temperature control covers, the inner casing is connected to a temperature adjustment mechanism, the outer casing is covered with an outer casing, and the outer casing and the inner casing are fixedly filled with thermal insulation cotton." In the utility model, through the inner casing, mounting seat, and inertial positioning and measuring components provided, the positioning accuracy can be evaluated by inertial navigation. Through the mutual cooperation of the two temperature control covers, the electric heating plate assembly, and the cooling plate assembly provided, the temperature inside the inner casing can be regulated to make the internal temperature within a suitable temperature range, thereby reducing the influence of the temperature on the inertial positioning and measuring components, and avoiding the problem of large deviations in the measurement and evaluation results caused by this. Through the mutual cooperation of the outer casing and the thermal insulation cotton provided, the influence of the external environment temperature on the inside of the inner casing can be reduced, and the temperature loss inside the inner casing can also be reduced, which is convenient for temperature control.

[0004] However, the above method still has the following defects: the inertial navigation product can be fixed by the inner casing and the mounting base, but the surface of the inner casing is relatively closed, and the inner casing needs to be opened and installed through the mounting base, which is not convenient for the installation and disassembly of the inertial navigation product, and it is not convenient to remove it quickly after testing. The temperature can be adjusted by supplying air through a micro fan. When the test environment is dusty, the dust can easily reach the surface of the inertial navigation product with the airflow, causing pollution to its surface. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a positioning accuracy testing device for an inertial navigation product, which has the advantages of being easy to disassemble and quick, and not easily contaminated by dust, and solves the problems raised by the above-mentioned background technology.

[0006] The utility model provides the following technical solutions: an inertial navigation product positioning accuracy testing device, comprising an insulation shell and a socket, a socket is fixedly provided on the inner wall in the middle of the bottom end of the insulation shell, a socket is opened on the surface of the socket, a damping rubber pad is provided inside the slot, inner walls on both sides of the insulation shell are provided with heating components, one side of the insulation shell is connected with a cooling component through a cooling copper plate, the other side of the insulation shell is connected with a dustproof tube through a pressure difference elimination tube, the inner wall of the bottom of the dustproof tube is provided with a waterproof and breathable membrane, the top of the insulation shell is provided with a threaded cover, the bottom end of the threaded cover is fixedly connected with a pressure plate through a pressure rod, and the bottom end of the pressure plate is provided with a damping film.

[0007] As a preferred technical solution of the utility model, the heating component includes an insulation board and a heating wire, a heating wire is fixedly provided on one side of the insulation board, and positioning plates are fixedly provided on both sides of the insulation board, and the positioning plates are fixedly connected to the inner wall of the insulation shell by screws.

[0008] As a preferred technical solution of the utility model, a plate groove is opened on one side of the insulation shell, the cooling copper plate is fixedly connected to the inside of the plate groove, and a plurality of fins are fixedly provided on the other side of the cooling copper plate.

[0009] As a preferred technical solution of the utility model, the cooling component includes a semiconductor refrigeration sheet and a heat dissipation fan. The surface of the semiconductor refrigeration sheet is provided with a thermal insulation pad. The cold end of the semiconductor refrigeration sheet is connected to a cold copper plate through thermal conductive silicone grease. The hot end of the semiconductor refrigeration sheet is connected to a heat sink through thermal conductive silicone grease. A heat dissipation fan is installed on one side of the heat sink.

[0010] As a preferred technical solution of the utility model, a protective cover is fixedly provided on the other side of the insulation shell, the semiconductor refrigeration plate and the heat dissipation fan are both located inside the protective cover, one side of the protective cover is fixedly connected to a cover plate by screws, and the surface of the cover plate is provided with a mesh.

[0011] As a preferred technical solution of the utility model, an air hole is opened on the other side of the insulation shell, one end of the pressure difference elimination tube is fixedly connected to the air hole, the other end of the pressure difference elimination tube is fixedly provided with a blocking plate, a ventilation groove is opened at the bottom of the pressure difference elimination tube, and the top end of the dustproof tube is fixedly connected to the ventilation groove.

[0012] As a preferred technical solution of the utility model, an external thread ring is fixedly provided in the middle of the top end of the thermal insulation shell, and the threaded cover is threadedly connected to the external thread ring.

[0013] As a preferred technical solution of the utility model, the bottom end of the pressure rod is fixedly connected to the middle part of the top end of the pressure plate, the top end of the pressure rod is fixedly connected to the middle part of the bottom end of the threaded cover, a knob is fixedly provided in the middle part of the top end of the threaded cover, a threading hole is opened on one side of the top end of the threaded cover, and a sealing ring is provided inside the threading hole.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The bottom of the inertial navigation product can be limited by the card seat and the card slot to prevent its horizontal displacement. By tightening the threaded cover, the pressure rod at the bottom can limit the top of the inertial navigation product through the pressure plate to prevent vertical shaking. The damping film can improve the fit and stability between the pressure plate and the inertial navigation product. The damping rubber pad can provide buffering and shock absorption for the inertial navigation product, which is convenient for quick installation of the inertial navigation product. The inertial navigation product can be quickly taken out by loosening the threaded cover.

[0016] 2. The temperature inside the insulation shell can be adjusted by the heating component and the cooling component to ensure the appropriateness of the test temperature and simulate different temperature conditions for testing activities. The pressure difference elimination tube can eliminate the pressure difference between the inside and outside of the insulation shell caused by temperature, ensuring that the air pressure inside and outside the insulation shell is consistent. The waterproof breathable membrane can prevent the entry of dust while ensuring its breathable performance, and can prevent the surface of the inertial navigation product from being contaminated by dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is one of the structural schematic diagrams of the utility model;

[0018] Figure 2 This is the second structural diagram of the utility model;

[0019] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the pressing plate of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the heating component of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the cooling component of the utility model;

[0023] Figure 7 It is a structural schematic diagram of the pressure difference elimination tube of the utility model.

[0024] In the figure: 1. insulation shell; 2. holder; 3. slot; 4. damping rubber pad; 5. heating component; 501. insulation board; 502. heating wire; 503. positioning board; 6. board slot; 7. cooling copper plate; 8. fin; 9. cooling component; 901. semiconductor refrigeration plate; 902. insulation pad; 903. heat sink; 904. cooling fan; 10. protective cover; 11. cover plate; 12. mesh; 13. air hole; 14. pressure difference elimination tube; 15. air slot; 16. dustproof tube; 17. waterproof breathable membrane; 18. external thread ring; 19. threaded cover; 20. knob; 21. pressure rod; 22. pressure plate; 23. damping rubber sheet; 24. blocking plate; 25. threading hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1 to 7 The positioning accuracy test device of the inertial navigation product comprises an insulation shell 1 and a holder 2. The inner wall of the middle part of the bottom end of the insulation shell 1 is fixed with the holder 2. The surface of the holder 2 is provided with a slot 3. The holder 2 can limit the bottom of the inertial navigation product through the slot 3 to prevent its horizontal displacement. The inside of the slot 3 is provided with a damping rubber pad 4. The inner walls on both sides of the insulation shell 1 are provided with a heating component 5. One side of the insulation shell 1 is connected with a cooling component 9 through a cooling copper plate 7. The heating component 5 and the cooling component 9 can adjust the temperature inside the insulation shell 1 to ensure the appropriate temperature and can It is enough to simulate different temperature conditions for testing activities. The other side of the insulation shell 1 is connected to a dustproof tube 16 through a pressure difference elimination tube 14. The pressure difference elimination tube 14 can eliminate the pressure difference between the inside and outside of the insulation shell 1 caused by temperature, and can ensure that the air pressure inside and outside the insulation shell 1 is consistent. The inner wall of the bottom of the dustproof tube 16 is provided with a waterproof breathable membrane 17. The waterproof breathable membrane 17 can prevent dust from entering while ensuring its breathability. The top of the insulation shell 1 is provided with a threaded cover 19, and the bottom end of the threaded cover 19 is fixedly connected to a pressure plate 22 through a pressure rod 21. The bottom end of the pressure plate 22 is provided with a damping film 23;

[0027] In this embodiment, preferably, the heating component 5 includes a heat insulation board 501 and a heating wire 502, the heating wire 502 is fixedly provided on one side of the heat insulation board 501, and positioning plates 503 are fixedly provided on both sides of the heat insulation board 501, and the positioning plates 503 are fixedly connected to the inner wall of the insulation shell 1 by screws, and the heat insulation board 501 can be fixed by screws and the positioning plates 503, the heat insulation board 501 can insulate the heating wire 502 from the insulation shell 1, and the heating wire 502 can heat the inside of the insulation shell 1;

[0028] In this embodiment, preferably, the cooling component 9 includes a semiconductor refrigeration sheet 901 and a heat dissipation fan 904, a thermal insulation pad 902 is provided on the surface of the semiconductor refrigeration sheet 901, the cold end of the semiconductor refrigeration sheet 901 is connected to the cold copper plate 7 through thermal conductive silicone grease, the hot end of the semiconductor refrigeration sheet 901 is connected to the heat sink 903 through thermal conductive silicone grease, a heat dissipation fan 904 is installed on one side of the heat sink 903, the semiconductor refrigeration sheet 901 can connect to the cold copper plate 7 through its cold end, the cold copper plate 7 has good thermal conductivity, and can transfer the low temperature to the insulation shell 1, the heat generated by the hot end of the semiconductor refrigeration sheet 901 can be discharged by the heat sink 903 and the heat dissipation fan 904, the thermal insulation pad 902 can insulate its cold end and hot end, a protective cover 10 is fixedly provided on the other side of the insulation shell 1, the semiconductor refrigeration sheet 901 and the heat dissipation fan 904 are both located inside the protective cover 10, one side of the protective cover 10 is fixedly connected to a cover plate 11 by screws, and a mesh 12 is provided on the surface of the cover plate 11. The protective cover 10 can provide protection for the semiconductor cooling sheet 901 and the cooling fan 904, and the mesh 12 can ensure the cooling activity;

[0029] In the present embodiment, preferably, a plate groove 6 is provided on one side of the heat-insulating shell 1, and a cold-conducting copper plate 7 is fixedly connected to the inside of the plate groove 6. A plurality of fins 8 are fixedly provided on the other side of the cold-conducting copper plate 7. The contact area between the cold-conducting copper plate 7 and the air in the heat-insulating shell 1 is increased by the fins 8, thereby improving the cooling speed. An air vent 13 is provided on the other side of the heat-insulating shell 1, and one end of a pressure difference elimination tube 14 is fixedly connected to the air vent 13. A blocking plate 24 is fixedly provided on the other end of the pressure difference elimination tube 14. An air vent 15 is provided on the bottom of the pressure difference elimination tube 14, and the top end of the dust-proof tube 16 is fixedly connected to the air vent 15. The air vent 13 and the air vent 15 can ensure the circulation of air.

[0030] In the present embodiment, preferably, an external threaded ring 18 is fixedly provided in the middle of the top of the insulation shell 1, and a threaded cover 19 is threadedly connected to the external threaded ring 18, and the threaded cover 19 can be positioned by the external threaded ring 18, the bottom end of the pressure rod 21 is fixedly connected to the middle of the top of the pressure plate 22, and the top of the pressure rod 21 is fixedly connected to the middle of the bottom end of the threaded cover 19, and a knob 20 is fixedly provided in the middle of the top of the threaded cover 19, and the threaded cover 19 can be easily loosened and tightened by the knob 20, and a threading hole 25 is opened on one side of the top of the threaded cover 19, and a sealing ring is provided inside the threading hole 25, and the wires of the inertial navigation product can be passed through the threading hole 25, and the sealing ring can seal it.

[0031] When in use, the tester fixes the insulation shell 1 on the test vehicle. When the positioning accuracy of the inertial navigation product is required, the tester first puts the inertial navigation product into the insulation shell 1, engages its bottom end with the card slot 3 of the card holder 2, and then passes the wire of the inertial navigation product through the threading hole 25. After that, the threaded cover 19 is tightened on the external threaded ring 18 through the knob 20. During the process of tightening the knob 20, the height of the pressure rod 21 at its bottom is reduced, and the top of the inertial navigation product can be limited by the pressure plate 22 to prevent the inertial navigation product from shaking vertically. The damping film 23 can improve the fit and stability between the pressure plate 22 and the inertial navigation product, and can provide protection for the surface of the inertial navigation product in cooperation with the damping rubber pad 4, so as to complete the rapid positioning of the inertial navigation product.

[0032] When the positioning accuracy test of the inertial navigation product is carried out by the test vehicle, the damping film 23 and the damping rubber pad 4 can absorb kinetic energy and provide buffering and shock absorption for the inertial navigation product, so that the inertial navigation product is not easy to shake. When the test temperature of the inertial navigation product needs to be adjusted, the tester can heat the inside of the insulation shell 1 through the heating wire 502 of the heating component 5 to increase the test temperature, and cool the cooling copper plate 7 through the semiconductor refrigeration sheet 901. The cooling copper plate 7 can transfer the low temperature to the insulation shell 1 through the fins 8, so that the temperature can be adjusted, and different temperature conditions can be simulated to test the product;

[0033] As the temperature inside the insulation shell 1 changes, the pressure difference elimination tube 14 can eliminate the pressure difference between the inside and outside of the insulation shell 1 caused by the temperature, thereby ensuring that the air pressure inside and outside the insulation shell 1 is consistent; the waterproof breathable membrane 17 can prevent the entry of dust while ensuring its breathability, thereby preventing the surface of the inertial navigation product from being contaminated by dust. After the positioning accuracy test of the inertial navigation product is completed, the tester loosens the threaded cover 19 through the knob 20, lifts the pressure plate 22, and then lifts the inertial navigation product vertically to take it out.

[0034] Although the 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 positioning accuracy testing device for an inertial navigation product, comprising a heat-insulating shell (1) and a holder (2), characterized in that: A holder (2) is fixedly provided on the inner wall in the middle of the bottom end of the heat-insulating shell (1), a holder (2) is provided on the surface of the holder (2), a damping rubber pad (4) is provided inside the holder (3), a heating component (5) is provided on the inner walls on both sides of the heat-insulating shell (1), one side of the heat-insulating shell (1) is connected to a cooling component (9) via a cooling copper plate (7), the other side of the heat-insulating shell (1) is connected to a dustproof tube (16) via a pressure difference elimination tube (14), a waterproof and breathable membrane (17) is provided on the inner wall at the bottom of the dustproof tube (16), a threaded cover (19) is provided at the top end of the heat-insulating shell (1), the bottom end of the threaded cover (19) is fixedly connected to a pressure plate (22) via a pressure rod (21), and a damping rubber sheet (23) is provided at the bottom end of the pressure plate (22).

2. The inertial navigation product positioning accuracy testing device according to claim 1, characterized in that: The temperature raising component (5) comprises a heat insulating plate (501) and a heating wire (502); the heating wire (502) is fixedly provided on one side of the heat insulating plate (501); positioning plates (503) are fixedly provided on both sides of the heat insulating plate (501); and the positioning plates (503) are fixedly connected to the inner wall of the heat insulating shell (1) by means of screws.

3. The inertial navigation product positioning accuracy testing device according to claim 1, characterized in that: A plate groove (6) is provided on one side of the heat-insulating shell (1), the cooling copper plate (7) is fixedly connected to the inside of the plate groove (6), and a plurality of fins (8) are fixedly provided on the other side of the cooling copper plate (7).

4. The positioning accuracy test device for inertial navigation products according to claim 1, characterized in that: The cooling component (9) comprises a semiconductor refrigeration sheet (901) and a heat dissipation fan (904); a heat insulation pad (902) is provided on the surface of the semiconductor refrigeration sheet (901); a cold end of the semiconductor refrigeration sheet (901) is connected to a cold copper plate (7) via thermal conductive silicone grease; a hot end of the semiconductor refrigeration sheet (901) is connected to a heat dissipation sheet (903) via thermal conductive silicone grease; and a heat dissipation fan (904) is installed on one side of the heat dissipation sheet (903).

5. The positioning accuracy test device for inertial navigation products according to claim 4, characterized in that: A protective cover (10) is fixedly provided on the other side of the heat-insulating shell (1), and the semiconductor cooling plate (901) and the heat dissipation fan (904) are both located inside the protective cover (10). A cover plate (11) is fixedly connected to one side of the protective cover (10) by screws, and a mesh (12) is provided on the surface of the cover plate (11).

6. The inertial navigation product positioning accuracy testing device according to claim 1, characterized in that: The other side of the heat-insulating shell (1) is provided with an air hole (13), one end of the pressure difference elimination pipe (14) is fixedly connected to the air hole (13), the other end of the pressure difference elimination pipe (14) is fixedly provided with a blocking plate (24), the bottom of the pressure difference elimination pipe (14) is provided with an air groove (15), and the top end of the dustproof pipe (16) is fixedly connected to the air groove (15).

7. The inertial navigation product positioning accuracy testing device according to claim 1, characterized in that: An external thread ring (18) is fixedly provided at the middle portion of the top end of the heat-insulating shell (1), and the threaded cover (19) is threadably connected to the external thread ring (18).

8. The positioning accuracy testing device for inertial navigation products according to claim 1, characterized in that: The bottom end of the pressure rod (21) is fixedly connected to the middle of the top end of the pressure plate (22), and the top end of the pressure rod (21) is fixedly connected to the middle of the bottom end of the threaded cover (19). A knob (20) is fixedly provided at the middle of the top end of the threaded cover (19). A threading hole (25) is provided on one side of the top end of the threaded cover (19), and a sealing ring is provided inside the threading hole (25).

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