Vehicle-mounted test platform for inertial navigation system

Abstract

The utility model relates to the technical field of inertial navigation system detection equipment, in particular to a vehicle-mounted test platform for an inertial navigation system. The vehicle-mounted test platform for the inertial navigation system comprises an installation substrate, the installation substrate is detachably connected with a test vehicle, and the vehicle-mounted test platform for the inertial navigation system further comprises an installation seat which is located above the installation substrate and fixedly connected with the installation substrate; the test box is provided with a shaft rod part, the shaft rod part is rotatably inserted into the mounting seat and is located above the mounting substrate, and the test box is used for carrying an inertial navigation system to be tested; the vibration assembly is mounted on the mounting base plate, and the vibration assembly can enable the test box to swing along the axis of the shaft rod part. The bumpy environment can be provided for the inertial navigation system to be tested under the condition that a driving test vehicle runs on a flat road surface, so that the monitoring accuracy of the inertial navigation system under the bumpy condition is tested and measured, and the test safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of inertial navigation system detection equipment, in particular to an inertial navigation system vehicle-mounted test platform. Background Art

[0002] Inertial navigation systems (INS) are widely used in vehicles, providing navigation information (such as location and direction of travel). As vehicles travel, they inevitably encounter bumpy roads. When these roads are bumpy, the INS is also affected by the bumps. Therefore, it is necessary to test the accuracy of INS monitoring under bumpy conditions.

[0003] If the inertial navigation system to be tested is mounted on a vehicle and the vehicle is driven on a bumpy road, the test process will cause certain wear and tear to the test vehicle, and the driving risk factor of the test is relatively high. Utility Model Content

[0004] The present utility model aims to provide an on-vehicle test platform for an inertial navigation system, which can at least partially overcome the above-mentioned technical problems. It can provide a bumpy environment for the inertial navigation system to be tested while the test vehicle is driving on a flat road, thereby enabling the monitoring accuracy of the inertial navigation system under bumpy conditions to be tested and measured, thereby improving the safety of the test.

[0005] The utility model provides an inertial navigation system vehicle-mounted test platform, including a mounting base, wherein the mounting base and the test vehicle are detachably connected. The inertial navigation system vehicle-mounted test platform also includes: a mounting seat, wherein the mounting seat is located above the mounting base and is fixedly connected to the mounting base; a test box, wherein a shaft portion is provided on the test box, wherein the shaft portion is rotatably inserted into the mounting base and is located above the mounting base, and the test box is used to carry the inertial navigation system to be tested; and a vibration component, wherein the vibration component is mounted on the mounting base, and wherein the vibration component can cause the test box to swing along the axis of the shaft portion.

[0006] Furthermore, the vibration assembly includes a first motor, which is fixedly mounted on the mounting base plate; a first cam is also fixedly provided on the output shaft of the first motor, and the outer peripheral surface of the first cam abuts against the bottom surface of the test box.

[0007] Further, the vibration assembly comprises a second motor, a crank and a connecting rod; the second motor is slidingly installed on the mounting base plate, and the sliding direction is perpendicular to the axial direction of the output shaft of the second motor; a second cam is fixedly arranged on the output shaft of the second motor, and the outer circumferential surface of the second cam abuts against the bottom surface of the test box; one end of the crank is fixedly arranged on the output shaft of the second motor, and the other end of the crank is hingedly connected to one end of the connecting rod; the other end of the connecting rod is hingedly connected to the mounting base plate.

[0008] Further, the inertial navigation system vehicle test platform further comprises a limiting assembly, and the limiting assembly can limit the angle of oscillation of the test box along the axial line of the shaft rod.

[0009] Further, the limiting assembly comprises a limiting tension spring, one end of the limiting tension spring is fixedly connected to the test box, and the other end of the limiting tension spring is fixedly connected to the mounting base plate.

[0010] Further, the limiting assembly further comprises a limiting table, and the limiting table is fixedly connected to the mounting base plate; an abutting table is fixedly arranged on the test box, and the limiting table is located on the side of the abutting table away from the mounting base plate.

[0011] Further, the inertial navigation system vehicle test platform further comprises a mounting assembly, and the mounting assembly is used for mounting the to-be-tested inertial navigation system in the test box.

[0012] Further, the mounting assembly comprises a threaded tube, a fastening nut and at least three clamping claws; the threaded tube is fixedly installed in the test box, each clamping claw is circumferentially distributed along the axial line of the threaded tube and is slidingly connected to the test box; a plurality of through holes are radially formed in the peripheral wall of the threaded tube, each through hole is circumferentially distributed along the axial line of the threaded tube and corresponds to each clamping claw; for any clamping claw, the clamping claw comprises an abutting portion and a pushing portion; the abutting portion is located in the interior of the threaded tube, and the abutting portion is used for abutting to the outer wall of the mounting portion of the to-be-tested inertial navigation system; the pushing portion is inserted into the through hole corresponding to the clamping claw and extends to the exterior of the threaded tube, and a wedge surface is arranged at the end of the pushing portion; the fastening nut is screwingly installed on the exterior of the threaded tube, an abutting ring is arranged on the end surface of the fastening nut facing the pushing portion, and in the process of screwing the fastening nut along the threaded tube, the abutting ring can abut against the wedge surface and push each clamping claw towards the axial line of the threaded tube.

[0013] Further, a flexible pad layer is fixedly arranged on the surface of the abutting portion for abutting to the outer wall of the to-be-tested inertial navigation system.

[0014] Furthermore, the test box includes a box body and a box cover, and the box cover and the box body are detachably connected.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] 1. The inertial navigation system vehicle test platform provided by the embodiments of the present disclosure drives the output shaft of the first motor to rotate, causing the test box to swing back and forth along the axis of the shaft portion. This, in turn, subjects the inertial navigation system under test, installed in the test box, to a simulated bumpy environment. This allows the monitoring accuracy of the inertial navigation system under bumpy conditions to be tested. Furthermore, the test process can be completed simply by driving the test vehicle on a flat road, resulting in minimal wear on the test vehicle and a high safety factor.

[0017] 2. In the inertial navigation system vehicle-mounted test platform provided by the embodiments of the present disclosure, the output shaft of the second motor rotates, thereby causing the test box to swing back and forth along the axis of the shaft portion. At the same time, under the action of the crank and connecting rod, the second motor also slides back and forth on the mounting base. As a result, the position where the second cam abuts the bottom surface of the test box constantly changes, causing the angular range of the test box's reciprocating swing along the axis of the shaft portion to continuously change. This increases the disorder of the simulated "bumping" and makes the simulated bumpy environment closer to a real bumpy environment. Consequently, in this environment, the monitoring accuracy of the inertial navigation system under bumpy conditions tested is more reasonable, and the results obtained are more reliable.

[0018] 3. The inertial navigation system vehicle-mounted test platform provided by the embodiments of the present disclosure can conveniently realize the installation of the inertial navigation system to be tested through a claw-type mounting assembly. After the inertial navigation system to be tested is placed inside the threaded tube, the fastening nut can be screwed in, so that the pushing portion of each claw can synchronously slide along the radial direction of the threaded tube toward the axis of the threaded tube under the action of the abutment ring, thereby clamping the mounting portion of the inertial navigation system to be tested. In the process of each claw clamping the mounting portion of the inertial navigation system to be tested, the contact portion of the cushion layer and the mounting portion is compressed and deformed. As a result, the cushion layer can increase the contact area between the claw and the mounting portion, which is conducive to more secure installation of the inertial navigation system to be tested and prevent it from loosening in a bumpy environment. The portion of the cushion layer that is higher than the mounting portion is located above the mounting portion, which can further prevent the inertial navigation system to be tested from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0020] Figure 1Schematic diagram of the three-dimensional structure of an inertial navigation system vehicle-mounted test platform according to Example 1 of the present utility model;

[0021] Figure 2 Schematic diagram of the three-dimensional structure of an inertial navigation system vehicle-mounted test platform according to Example 2 of the present utility model;

[0022] Figure 3 2 is a cross-sectional view of the inertial navigation system vehicle-mounted test platform according to embodiment 2 of the present invention;

[0023] Figure 4 FIG2 is another cross-sectional view of the inertial navigation system vehicle-mounted test platform according to embodiment 2 of the present invention.

[0024] Markings and corresponding parts names in the accompanying drawings:

[0025] 1-mounting base plate; 2-mounting seat; 3-test chamber; 31-shaft portion; 32-chamber cover; 41-first motor; 42-first cam; 51-second motor; 52-crank; 53-connecting rod; 54-second cam; 61-limiting spring; 62-limiting platform; 63-abutment platform; 71-threaded tube; 72-locking nut; 721-abutment ring; 73-claw; 731-abutment portion; 732-thrust portion; 7321-wedge surface; 733-pad; 8-inertial navigation system to be tested; 81-mounting portion. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the following examples and accompanying drawings. The exemplary embodiments and descriptions of the present invention are intended only to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the stage of actual development and use.

[0027] Inertial navigation systems (INS) are widely used to provide navigation information (such as location and direction) during vehicle operation. As vehicles travel, they inevitably encounter bumpy roads. When these roads are bumpy, the INS is also affected by the bumps. Therefore, it is necessary to test the INS's accuracy under bumpy conditions.

[0028] If the inertial navigation system to be tested is directly mounted on a vehicle and the vehicle is driven on a bumpy road, the test process will cause certain wear and tear to the test vehicle, and the driving risk factor of the test is relatively high.

[0029] To this end, the utility model provides an on-vehicle test platform for an inertial navigation system, which can provide a simulated bumpy environment for the inertial navigation system to be tested when the test vehicle is driving on a flat road, thereby realizing the test measurement of the monitoring accuracy of the inertial navigation system under bumpy conditions, which is conducive to improving the safety of the test.

[0030] Example 1:

[0031] like Figure 1 As shown, this embodiment provides an inertial navigation system vehicle-mounted test platform, including a mounting base 1, wherein the mounting base 1 is detachably connected to the test vehicle, and the inertial navigation system vehicle-mounted test platform further includes:

[0032] A mounting base 2, the mounting base 2 being located above the mounting substrate 1 and fixedly connected to the mounting substrate 1;

[0033] A test box 3 is provided with a shaft portion 31, the shaft portion 31 is rotatably inserted into the mounting seat 2 and is located above the mounting base 1, and the test box 3 is used to carry the inertial navigation system 8 to be tested;

[0034] A vibration component is installed on the mounting base 1 , and the vibration component can make the test box 3 swing along the axis of the shaft portion 31 .

[0035] Preferably, the test box 3 comprises a box body and a box cover 32, wherein the box cover 32 is detachably connected to the box body. The detachable connection between the box body and the box cover 32 facilitates the installation of the inertial navigation system 8 to be tested.

[0036] Specifically, the vibration assembly includes a first motor 41, which is fixedly mounted on the mounting substrate 1;

[0037] A first cam 42 is fixedly mounted on the output shaft of the first motor 41 , and an outer peripheral surface of the first cam 42 abuts against the bottom surface of the test box 3 .

[0038] Accordingly, by driving the output shaft of the first motor 41 to rotate, the test box 3 can be made to swing back and forth along the axis of the shaft portion 31, thereby placing the inertial navigation system 8 to be tested installed in the test box 3 in a simulated bumpy environment, thereby making it possible to test the monitoring accuracy of the inertial navigation system 8 to be tested under bumpy conditions, and the test process can be completed by only driving the test vehicle on a flat road, and the test process causes little wear on the test vehicle and has a high safety factor.

[0039] Example 2:

[0040] like Figures 2 to 4As shown, this embodiment is based on embodiment 1, except that:

[0041] The vibration assembly includes a second motor 51, a crank 52 and a connecting rod 53;

[0042] The second motor 51 is slidably mounted on the mounting base 1 , and the sliding direction is perpendicular to the axial direction of the output shaft of the second motor 51 . A second cam 54 is fixedly mounted on the output shaft of the second motor 51 , and the outer peripheral surface of the second cam 54 abuts against the bottom surface of the test box 3 .

[0043] One end of the crank 52 is fixedly mounted on the output shaft of the second motor 51 , and the other end of the crank 52 is hinged to one end of the connecting rod 53 . The other end of the connecting rod 53 is hinged to the mounting base 1 .

[0044] Based on this, compared with Example 1, the inertial navigation system vehicle test platform provided in this embodiment rotates the output shaft of the second motor 51, thereby causing the test box 3 to swing back and forth along the axis of the shaft portion 31. At the same time, under the action of the crank 52 and the connecting rod 53, the second motor 51 also slides back and forth on the mounting base 1 (compare Figure 3 and Figure 4 It can be seen that under the action of the rotation of the output shaft of the second motor 51, the second motor 51 slides along the mounting base plate 1), and thus the position where the second cam 54 and the bottom surface of the test box 3 abut each other changes at all times, so that the angle range of the reciprocating swing of the test box 3 along the axis of the shaft portion 31 changes continuously, which increases the disorder of the simulated "bump", making the simulated bumpy environment closer to the real bumpy environment, and thus testing the monitoring accuracy of the inertial navigation system 8 to be tested under bumpy conditions in this environment is more reasonable, and the results obtained are more reliable.

[0045] Preferably, the inertial navigation system vehicle-mounted test platform further includes a limiting component, which can limit the swing angle of the test box 3 along the axis of the shaft portion 31 .

[0046] Specifically, the limiting assembly includes a limiting tension spring, which is located on the side of the test box 3 facing the mounting substrate 1 , with one end of the limiting tension spring fixedly connected to the test box 3 and the other end fixedly connected to the mounting substrate 1 .

[0047] Therefore, by setting the limit spring, it is possible to effectively prevent the test box 3 and the second cam 54 from colliding with each other (for embodiment 1, it is to prevent the test box 3 and the first cam 42 from colliding with each other), thereby causing the test box 3 to swing "over" along the shaft portion 31 (i.e., Figure 2As shown, the test box 3 is prevented from rotating counterclockwise along the shaft portion 31 to the other side of the mounting base 2), which causes the test to be unable to continue, and the limit tension spring can effectively reduce the number and degree of collisions between the test box 3 and the second cam 54.

[0048] More preferably, the limiting assembly further includes a limiting platform 62, and the limiting platform 62 is fixedly connected to the mounting substrate 1;

[0049] An abutment platform 63 is fixedly provided on the test box 3 , and the limiting platform 62 is located on a side of the abutment platform 63 away from the mounting substrate 1 .

[0050] Therefore, even if the limiting tension spring is excessively stretched, the limiting platform 62 can ensure that the test box 3 does not swing “too far” along the shaft portion 31 .

[0051] Example 3:

[0052] like Figures 2 to 4 As shown, this embodiment is based on embodiment 2, except that, in this embodiment:

[0053] The inertial navigation system vehicle-mounted test platform further includes an installation component, which is used to install the inertial navigation system 8 to be tested in the test box 3.

[0054] Specifically, the mounting assembly includes a threaded tube 71, a fastening nut and at least three claws 73;

[0055] The threaded tube 71 is fixedly installed in the test box 3, and the claws 73 are evenly distributed along the circumference of the axis of the threaded tube 71 and are all slidably connected to the test box 3;

[0056] A plurality of through holes are radially opened on the peripheral wall of the threaded tube 71 , and the through holes are evenly distributed along the circumference of the axis of the threaded tube 71 and correspond one-to-one to the claws 73 ;

[0057] For any of the claws 73, the claw 73 includes an abutting portion 731 and a pushing portion 732; the abutting portion 731 is located inside the threaded tube 71 and is used to abut against the outer wall of the mounting portion 81 of the inertial navigation system 8 to be tested; the pushing portion 732 is inserted into the through hole corresponding to the claw 73 and extends to the outside of the threaded tube 71, and a wedge-shaped surface 7321 is provided at the end of the pushing portion 732;

[0058] The fastening nut is threadedly installed on the outside of the threaded tube 71, and an abutment ring 721 is provided on the end face of the fastening nut facing the pushing portion 732. When the fastening nut is screwed in along the threaded tube 71, the abutment ring 721 can abut against the wedge surface 7321 and push each of the claws 73 toward the axis of the threaded tube 71.

[0059] Therefore, the inertial navigation system vehicle test platform provided in this embodiment can conveniently realize the installation of the inertial navigation system 8 to be tested through the mounting assembly of the claw 73. Figure 3 and Figure 4 After the inertial navigation system 8 to be tested is placed inside the threaded tube 71, by screwing in the fastening nut, the pushing portion 732 of each claw 73 can be synchronously slid along the radial direction of the threaded tube 71 toward the axis of the threaded tube 71 under the action of the abutment ring 721, thereby clamping the mounting portion 81 of the inertial navigation system 8 to be tested.

[0060] More preferably, the abutting portion 731 of each of the claws 73 is higher than the mounting portion 81, and a flexible cushion layer 733 is fixedly provided on the surface of the abutting portion 731 for abutting against the outer wall of the inertial navigation system 8 to be measured. Preferably, the cushion layer 733 is selected from one of rubber, polyurethane and silicone. Figure 4 As shown, in the process of each claw 73 clamping the mounting portion 81 of the inertial navigation system 8 to be tested, the portion of the cushion layer 733 in contact with the mounting portion 81 is compressed and deformed. As a result, the cushion layer 733 can increase the contact area between the claw 73 and the mounting portion 81, which is conducive to installing the inertial navigation system 8 to be tested more firmly and preventing it from loosening in a bumpy environment; and the portion of the cushion layer 733 that is higher than the mounting portion 81 is located above the mounting portion 81, which can further prevent the inertial navigation system 8 to be tested from loosening.

[0061] It should be understood that, in this application, the inertial navigation system 8 to be tested refers to hardware, not software. The term "rotational insertion" refers to a situation where two components can only rotate relative to each other. For example, a rotational arrangement of a hole and a shaft can restrict axial relative movement by providing a shoulder on the shaft and a stop slot in the hole. The terms "sliding installation" and "sliding connection" refer to situations where two components can only slide relative to each other, such as dovetail grooves, T-slots, and other structures.

[0062] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. An inertial navigation system vehicle test platform, comprising a mounting base (1), wherein the mounting base (1) is detachably connected to a test vehicle, and is characterized in that: The inertial navigation system vehicle-mounted test platform also includes: A mounting seat (2), the mounting seat (2) being located above the mounting substrate (1) and fixedly connected to the mounting substrate (1); A test box (3), wherein a shaft portion (31) is provided on the test box (3), the shaft portion (31) is rotatably inserted on the mounting seat (2) and is located above the mounting base (1), and the test box (3) is used to carry the inertial navigation system (8) to be tested; A vibration component is mounted on the mounting base plate (1), and the vibration component is capable of causing the test box (3) to swing along the axis of the shaft portion (31).

2. The inertial navigation system vehicle-mounted test platform according to claim 1, characterized in that: The vibration assembly comprises a first motor (41), wherein the first motor (41) is fixedly mounted on the mounting substrate (1); A first cam (42) is also fixedly provided on the output shaft of the first motor (41), and the outer peripheral surface of the first cam (42) abuts against the bottom surface of the test box (3).

3. The inertial navigation system vehicle-mounted test platform according to claim 1, characterized in that: The vibration assembly includes a second motor (51), a crank (52) and a connecting rod (53); The second motor (51) is slidably mounted on the mounting base (1), and the sliding direction is perpendicular to the axial direction of the output shaft of the second motor (51). A second cam (54) is also fixedly arranged on the output shaft of the second motor (51), and the outer peripheral surface of the second cam (54) abuts against the bottom surface of the test box (3); One end of the crank (52) is fixedly arranged on the output shaft of the second motor (51), the other end of the crank (52) is hinged to one end of the connecting rod (53), and the other end of the connecting rod (53) is hinged to the mounting base (1).

4. The inertial navigation system vehicle-mounted test platform according to claim 2 or 3, characterized in that: The inertial navigation system vehicle-mounted test platform further comprises a limit assembly, wherein the limit assembly is capable of limiting the swing angle of the test box (3) along the axis of the shaft portion (31).

5. The inertial navigation system vehicle-mounted test platform according to claim 4, characterized in that: The limiting assembly comprises a limiting tension spring, which is located on a side of the test box (3) facing the mounting base (1), one end of the limiting tension spring being fixedly connected to the test box (3), and the other end being fixedly connected to the mounting base (1).

6. The inertial navigation system vehicle-mounted test platform according to claim 5, characterized in that: The limiting assembly further comprises a limiting platform (62), wherein the limiting platform (62) is fixedly connected to the mounting base plate (1); An abutment platform (63) is fixedly provided on the test box (3), and the limiting platform (62) is located on a side of the abutment platform (63) away from the mounting substrate (1).

7. The inertial navigation system vehicle-mounted test platform according to claim 1, characterized in that: The inertial navigation system vehicle-mounted test platform further comprises a mounting assembly, wherein the mounting assembly is used to mount the inertial navigation system (8) to be tested in the test box (3).

8. The inertial navigation system vehicle-mounted test platform according to claim 7, characterized in that: The mounting assembly comprises a threaded tube (71), a fastening nut and at least three claws (73); The threaded tube (71) is fixedly installed in the test box (3), and the claws (73) are evenly distributed along the circumference of the axis of the threaded tube (71) and are all slidably connected to the test box (3); A plurality of through holes are radially opened on the peripheral wall of the threaded tube (71), and each of the through holes is evenly distributed along the circumference of the axis of the threaded tube (71) and corresponds one-to-one to each of the claws (73); For any of the claws (73), the claw (73) includes an abutting portion (731) and a pushing portion (732); the abutting portion (731) is located inside the threaded tube (71), and the abutting portion (731) is used to abut against the outer wall of the mounting portion (81) of the inertial navigation system (8) to be measured; the pushing portion (732) is inserted into a through hole corresponding to the claw (73) and extends to the outside of the threaded tube (71), and a wedge-shaped surface (7321) is provided at the end of the pushing portion (732); The fastening nut is threadedly mounted on the outside of the threaded tube (71), and an abutment ring (721) is provided on the end face of the fastening nut facing the pushing portion (732). When the fastening nut is screwed in along the threaded tube (71), the abutment ring (721) can abut against the wedge surface (7321) and push each of the claws (73) toward the axis of the threaded tube (71).

9. The inertial navigation system vehicle-mounted test platform according to claim 8, characterized in that: A flexible cushion layer (733) is fixedly provided on the surface of the abutting portion (731) for abutting against the outer wall of the inertial navigation system (8) to be measured.

10. The inertial navigation system vehicle-mounted test platform according to claim 1, characterized in that: The test box (3) comprises a box body and a box cover (32), and the box cover (32) and the box body are detachably connected.

Images