Three-axis high-precision MEMS inertial navigation system

Abstract

The invention discloses a three-axis high-precision MEMS inertial navigation system, and relates to the field of navigation systems.The three-axis high-precision MEMS inertial navigation system comprises a navigation device body, a positioning plate is fixedly connected to the bottom of the navigation device body, a mounting assembly is arranged at the bottom of the positioning plate and comprises a mounting base, positioning holes are formed in the two sides of the top of the positioning plate, and the mounting base is fixedly connected with the positioning plate. Positioning shells are arranged on the two sides of the positioning plate in a sleeving mode, the bottoms of the positioning shells are fixedly connected with the mounting base, adjusting plates are arranged on the tops of the positioning shells, positioning rods are fixedly connected to the bottoms of the adjusting plates, and the bottoms of the positioning rods penetrate through the positioning shells and extend to inner cavities of the positioning holes. By arranging the mounting assembly, the navigation device body can be quickly fixed above the mounting seat, and when the navigation device body needs to be disassembled, maintained or replaced subsequently, the limitation on the navigation device body can be relieved only by rotating the hand wheel, so that the navigation device body is convenient to maintain, and the method is high in creativity.

Description

Technical Field

[0001] The present application relates to the field of navigation systems, and in particular to a three-axis high-precision MEMS inertial navigation system. Background Art

[0002] The three-axis high-precision MEMS inertial navigation system is an inertial navigation system based on micro-electromechanical system (MEMS) technology. It has the characteristics of high precision, miniaturization, low cost and high reliability. It is widely used in military, civilian and scientific research fields. The working principle of the three-axis high-precision MEMS inertial navigation system is based on the basic principle of inertial navigation, that is, using a gyroscope to measure the angular velocity of the carrier, and obtaining the attitude angle by integration; using an accelerometer to measure the acceleration of the carrier, and obtaining the velocity and position information by secondary integration.

[0003] Existing three-axis high-precision MEMS inertial navigation devices are mostly fixed with bolts or the like when in use. When the three-axis high-precision MEMS inertial navigation device malfunctions and needs to be disassembled for maintenance or replacement, special tools are also required to disassemble it, which is time-consuming and labor-intensive, and is not conducive to the maintenance of the three-axis high-precision MEMS inertial navigation device. Summary of the invention

[0004] The purpose of this application is to provide a three-axis high-precision MEMS inertial navigation system with the advantage of easy maintenance.

[0005] To achieve the above-mentioned purpose, the present application further provides a three-axis high-precision MEMS inertial navigation system, including a navigation device body, a positioning plate fixedly connected to the bottom of the navigation device body, a mounting assembly arranged at the bottom of the positioning plate, the mounting assembly comprising a mounting seat, positioning holes are provided on both sides of the top of the positioning plate, a positioning shell is sleeved on both sides of the positioning plate, the bottom of the positioning shell is fixedly connected to the mounting seat, an adjustment plate is provided on the top of the positioning shell, a positioning rod is fixedly connected to the bottom of the adjustment plate, the bottom of the positioning rod passes through the positioning shell and extends to the inner cavity of the positioning hole, the inner cavity of the mounting seat is provided with a first lifting plate, and the first A second lifting plate is provided on both sides of the lifting plate, a block is fixedly connected to the front side of the top of the first lifting plate, the top of the block passes through the top of the mounting seat, a limited telescopic rod and a first spring are fixedly connected between the bottom of the first lifting plate and the bottom of the inner cavity of the mounting seat, a lifting rod and a second spring are fixedly connected to the top of the second lifting plate, the top of the lifting rod passes through the mounting seat and is fixedly connected to the adjusting plate, a lifting frame is fixedly connected between the two second lifting plates, a rotating rod is provided between the top of the first lifting plate and the lifting frame, a cam is sleeved on the surface of the rotating rod, and a rear end of the rotating rod passes through the rear side of the mounting seat and is fixedly connected to a hand wheel.

[0006] Preferably, the bottoms of both sides of the mounting seat are fixedly connected with mounting plates, and the front and rear sides of the top of the mounting plate are provided with mounting holes.

[0007] Preferably, the surface of the cam is in contact with the first lifting plate and the lifting frame respectively, and the surface of the rotating rod is movably connected to the mounting seat via a bearing.

[0008] Preferably, an opening for use with a stopper is provided at the top of the mounting seat, and first through holes for use with a lifting rod are provided on both sides of the top of the mounting seat.

[0009] Preferably, a second through hole for use with the positioning rod is opened on the top of the positioning shell, and the surface of the stopper is in contact with the positioning plate.

[0010] Preferably, the lifting frame is U-shaped, and the cam is elliptical.

[0011] Preferably, the surface of the positioning plate contacts the inner wall of the positioning shell, and the front side of the mounting seat is fixedly connected with an inspection plate by bolts.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. By setting the installation assembly, the navigation device body can be quickly fixed on the top of the mounting seat. When the navigation device body needs to be disassembled, maintained or replaced later, the restriction on the navigation device body can be released by turning the hand wheel, thereby facilitating the maintenance of the navigation device body, which is highly inventive;

[0014] 2. By setting the opening, the installation and use of the block can be facilitated. By setting the first through hole, the installation and use of the lifting rod can be facilitated. By setting the second through hole, the installation and use of the positioning rod can be facilitated. By setting the elliptical cam, it can be used to adjust the lifting frame and the first lifting plate. By setting the inspection plate, the maintenance of the mounting seat can be facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a three-axis high-precision MEMS inertial navigation system provided by the present application;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of a navigation device body of a three-axis high-precision MEMS inertial navigation system provided by the present application;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the installation components of a three-axis high-precision MEMS inertial navigation system provided by the present application;

[0018] Figure 4It is a rear cross-sectional view of a mounting assembly of a three-axis high-precision MEMS inertial navigation system provided by the present application;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of a first lifting plate and a second lifting plate of a three-axis high-precision MEMS inertial navigation system provided by the present application.

[0020] In the figure: 1. navigation device body; 2. mounting assembly; 201. mounting seat; 202. hand wheel; 203. positioning shell; 204. adjusting plate; 205. positioning rod; 206. first lifting plate; 207. second lifting plate; 208. stopper; 209. limiting telescopic rod; 210. first spring; 211. lifting rod; 212. second spring; 213. lifting frame; 214. rotating rod; 215. cam; 3. positioning plate; 4. mounting plate; 5. mounting hole; 6. positioning hole. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Terms such as "upper", "above", "lower", "below", "first end", "second end", "one end", "the other end" used in the present application to represent spatial relative positions are used to describe the relationship between a unit or feature as shown in the accompanying drawings relative to another unit or feature for the purpose of convenience of explanation. Terms of spatial relative position may be intended to include different orientations of the device in use or work other than the orientation shown in the figure. For example, if the device in the figure is turned over, the unit described as being "below" or "below" other units or features will be located "above" other units or features. Therefore, the exemplary term "below" can encompass both the above and below orientations. The device can be oriented in other ways (rotated 90 degrees or other orientations), and the spatially related descriptors used herein are interpreted accordingly.

[0022] In addition, the terms "installed", "set", "provided with", "connected", "slidingly connected", "fixed", and "sleeved" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described in this application are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0024] See also Figure 1-5 The present invention provides a technical solution: a three-axis high-precision MEMS inertial navigation system, a navigation device body 1, a positioning plate 3 is fixedly connected to the bottom of the navigation device body 1, a mounting assembly 2 is arranged at the bottom of the positioning plate 3, the mounting assembly 2 includes a mounting seat 201, positioning holes 6 are opened on both sides of the top of the positioning plate 3, positioning shells 203 are sleeved on both sides of the positioning plate 3, the bottom of the positioning shell 203 is fixedly connected to the mounting seat 201, an adjusting plate 204 is arranged on the top of the positioning shell 203, a positioning rod 205 is fixedly connected to the bottom of the adjusting plate 204, the bottom of the positioning rod 205 passes through the positioning shell 203 and extends to the inner cavity of the positioning hole 6, a first lifting plate 206 is arranged in the inner cavity of the mounting seat 201, and second lifting plates 207 are arranged on both sides of the first lifting plate 206, and the first lifting plate 206 is provided with a second lifting plate 207. A stopper 208 is fixedly connected to the front side of the top of a lifting plate 206, and the top of the stopper 208 passes through the top of the mounting seat 201. A limited telescopic rod 209 and a first spring 210 are fixedly connected between the bottom of the first lifting plate 206 and the bottom of the inner cavity of the mounting seat 201, respectively. A lifting rod 211 and a second spring 212 are fixedly connected to the top of the second lifting plate 207, respectively. The top of the lifting rod 211 passes through the mounting seat 201 and is fixedly connected to the adjusting plate 204. A lifting frame 213 is fixedly connected between the two second lifting plates 207. A rotating rod 214 is arranged between the top of the first lifting plate 206 and the lifting frame 213. A cam 215 is sleeved on the surface of the rotating rod 214. The rear end of the rotating rod 214 passes through the rear side of the mounting seat 201 and is fixedly connected to the hand wheel 202.

[0025] Embodiment 1: By setting the mounting assembly 2, the navigation device body 1 can be quickly fixed above the mounting seat 201. When the navigation device body 1 needs to be disassembled, maintained or replaced later, it is only necessary to turn the hand wheel 202 to release the restriction on the navigation device body 1, thereby facilitating the maintenance of the navigation device body 1, which is highly inventive.

[0026] In one possible implementation, see Figure 1-5A three-axis high-precision MEMS inertial navigation system, the top of the mounting seat 201 is provided with an opening for use with a stopper 208, both sides of the top of the mounting seat 201 are provided with first through holes for use with a lifting rod 211, the top of the positioning shell 203 is provided with a second through hole for use with a positioning rod 205, the surface of the stopper 208 is in contact with the positioning plate 3, the lifting frame 213 is U-shaped, the cam 215 is elliptical, the surface of the positioning plate 3 is in contact with the inner wall of the positioning shell 203, and the front side of the mounting seat 201 is fixedly connected with an inspection plate by bolts.

[0027] Embodiment 2: By setting an opening, the installation and use of the block 208 can be facilitated. By setting a first through hole, the installation and use of the lifting rod 211 can be facilitated. By setting a second through hole, the installation and use of the positioning rod 205 can be facilitated. By setting an elliptical cam 215, it can be used to adjust the lifting frame 213 and the first lifting plate 206. By setting an inspection plate, the inspection of the mounting base 201 can be facilitated.

[0028] On the basis of Example 1, this example describes the mounting assembly 2 in Example 1, the bottoms of both sides of the mounting seat 201 are fixedly connected with mounting plates 4, the front and rear sides of the top of the mounting plate 4 are provided with mounting holes 5, the surfaces of the cam 215 are in contact with the first lifting plate 206 and the lifting frame 213 respectively, the surface of the rotating rod 214 is movably connected to the mounting seat 201 through a bearing, and by providing the mounting plate 4 and the mounting hole 5, the mounting seat 201 can be easily fixed, and by providing the bearing, the rotation of the rotating rod 214 can be facilitated.

[0029] Working principle: the mounting seat 201 is fixed at the required position through the cooperation of the mounting plate 4 and the mounting hole 5, and then the rotating rod 214 is rotated through the cooperation of the hand wheel 202, and the rotating rod 214 drives the cam 215 to rotate. The rotation of the cam 215 will squeeze the lifting frame 213 and the first lifting plate 206. The first lifting plate 206 is squeezed and moves downward to squeeze the first spring 210, and also drives the stopper 208 to move downward. The lifting frame 213 is squeezed and moves upward. The lifting frame 213 drives the second lifting plate 207 to move upward to squeeze the second spring 212. At the same time, the second lifting plate 207 drives the lifting rod 211 and the adjusting plate 204 to move upward. The adjusting plate 204 drives the positioning rod 205 to move upward. Then the navigation device body 1 can be moved to drive the positioning plate 3 to insert into the inner cavity of the positioning shell 203, so that the positioning rod 205 corresponds to the positioning hole 6, and then the hand wheel 202 is released. At this time, the first spring 210 and the second spring 212 are reset. The first spring 210 is reset and drives the stopper 208 to move upward to the front side of the positioning plate 3 through the cooperation of the first lifting plate 206 to limit the positioning plate 3. The second spring 212 is reset and drives the second lifting plate 207 to move downward. The second lifting plate 207 drives the positioning rod 205 to move downward and insert into the positioning hole 6 through the cooperation of the lifting rod 211 and the adjusting plate 204. The positioning plate 3 is fixed in all directions by the positioning rod 205 and the stopper 208, so as to quickly fix the navigation device body 1. When disassembly is required, it is only necessary to rotate the hand wheel 202 to drive the cam 215 to squeeze the lifting frame 213 and the first lifting plate 206. The first lifting plate 206 drives the stopper 208 to move downward to release the restriction on the front side of the positioning plate 3. The lifting frame 213 drives the positioning rod 205 to move upward and move out of the positioning hole 6, so as to release the restriction on the positioning plate 3. Then the navigation device body 1 can be moved forward for disassembly, which is convenient and quick.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-axis high-precision MEMS inertial navigation system, characterized in that: The invention comprises a navigation device body (1), a positioning plate (3) being fixedly connected to the bottom of the navigation device body (1), a mounting assembly (2) being arranged at the bottom of the positioning plate (3), the mounting assembly (2) comprising a mounting seat (201), positioning holes (6) being arranged on both sides of the top of the positioning plate (3), positioning shells (203) being sleeved on both sides of the positioning plate (3), the bottom of the positioning shell (203) being fixedly connected to the mounting seat (201), an adjusting plate (204) being arranged at the top of the positioning shell (203), a positioning rod (205) being fixedly connected to the bottom of the adjusting plate (204), the bottom of the positioning rod (205) passing through the positioning shell (203) and extending to the inner cavity of the positioning hole (6), the inner cavity of the mounting seat (201) being arranged with a first lifting plate (206), second lifting plates (207) being arranged on both sides of the first lifting plate (206), the first lifting plate (206) A stopper (208) is fixedly connected to the front side of the top, and the top of the stopper (208) passes through the top of the mounting seat (201). A limited telescopic rod (209) and a first spring (210) are fixedly connected between the bottom of the first lifting plate (206) and the bottom of the inner cavity of the mounting seat (201), respectively. A lifting rod (211) and a second spring (212) are fixedly connected to the top of the second lifting plate (207), respectively. The top of the lifting rod (211) passes through the mounting seat (201) and is fixedly connected to the adjustment plate (204). A lifting frame (213) is fixedly connected between the two second lifting plates (207). A rotating rod (214) is arranged between the top of the first lifting plate (206) and the lifting frame (213), and a cam (215) is sleeved on the surface of the rotating rod (214). The rear end of the rotating rod (214) passes through the rear side of the mounting seat (201) and is fixedly connected to a hand wheel (202).

2. A three-axis high-precision MEMS inertial navigation system according to claim 1, characterized in that: The bottoms of both sides of the mounting seat (201) are fixedly connected to mounting plates (4), and the front and rear sides of the top of the mounting plate (4) are provided with mounting holes (5).

3. A three-axis high-precision MEMS inertial navigation system according to claim 1, characterized in that: The surface of the cam (215) is in contact with the first lifting plate (206) and the lifting frame (213) respectively, and the surface of the rotating rod (214) is movably connected to the mounting seat (201) via a bearing.

4. The three-axis high-precision MEMS inertial navigation system according to claim 1, characterized in that: The top of the mounting seat (201) is provided with an opening for use in conjunction with a stopper (208), and both sides of the top of the mounting seat (201) are provided with first through holes for use in conjunction with a lifting rod (211).

5. The three-axis high-precision MEMS inertial navigation system according to claim 1, characterized in that: A second through hole for use with the positioning rod (205) is provided on the top of the positioning shell (203), and the surface of the stopper (208) is in contact with the positioning plate (3).

6. A three-axis high-precision MEMS inertial navigation system according to claim 1, characterized in that: The lifting frame (213) is in a U-shape, and the cam (215) is in an elliptical shape.

7. The three-axis high-precision MEMS inertial navigation system according to claim 1, characterized in that: The surface of the positioning plate (3) contacts the inner wall of the positioning shell (203), and the front side of the mounting seat (201) is fixedly connected with an inspection plate by means of bolts.

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