A fiber-optic gyroscope north seeker device

Abstract

This utility model relates to the field of inertial navigation technology, and particularly to a fiber optic gyroscope north-finding device, comprising a housing, a cover plate, and a cable bracket. The housing and cover plate are fixedly connected by fastening screws to form a sealed cavity. An IMU (Inertial Measurement Unit) is fixedly installed at the front end of the north-finding component. A first adapter connector and a second adapter connector are provided at the front upper part of the cable harness fixing plate. A fuse, a power supply connection, and a communication connector are respectively provided in the right cavity of the housing. A control circuit assembly is provided in the front cavity of the housing, and a switching power supply is provided in the right cavity. A cable clip is provided at the upper end of the cable bracket. This fiber optic gyroscope north-finding device, through independent latitude calculation technology and optimized sealing structure, achieves high-precision north-finding function without external positioning dependence, significantly improving the reliability and adaptability of the device in complex environments.

Description

Technical Field

[0001] This utility model relates to the field of inertial navigation technology, and in particular to a fiber optic gyroscope north-finding device. Background Technology

[0002] In inertial navigation technology, the north finder is a key device for determining the geographic North Pole. Traditional north finders typically employ a multi-position stopping and starting scheme for north-finding operations. During angle calculation, accurate latitude and gravitational acceleration values ​​are required. However, in many practical application scenarios, such as complex environments like underground tunnels, indoor environments, and urban canyons, satellite positioning signals are often blocked or interfered with, resulting in the inability to obtain accurate location information and, consequently, latitude values. This makes it difficult for traditional north finders to function properly in these scenarios, severely limiting their application scope. Furthermore, some existing north finder products have shortcomings in structural design and circuit connection layout. The internal component layout of some products is not compact and reasonable, resulting in a large device size that is inconvenient to carry and install in space-constrained environments. At the same time, complex and messy wiring connections not only easily lead to signal interference problems, affecting the accuracy and stability of data transmission, but also increase the probability of device failure, reducing the reliability and ease of maintenance of the device. Therefore, it is necessary to design a fiber optic gyroscope north finder to solve the above problems. Utility Model Content

[0003] The main purpose of this invention is to provide a fiber optic gyroscope north-finding device that can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fiber optic gyroscope north-finding device includes a housing, a cover plate, and a cable bracket. The housing and cover plate are fixedly connected by fastening screws to form a sealed cavity. A display screen is fixedly connected to the upper left end of the housing. An indicator light, a signal switch, and two power switches are respectively provided on the left end of the housing, and the indicator light, signal switch, and two power switches are located around the outer perimeter of the display screen. A north-finding instrument assembly is fixedly installed at the bottom of the housing by fastening screws. A limit block is fixedly connected to the middle left end of the north-finding instrument assembly. A north-finding instrument control board and a power board are fixedly connected to the upper front end of the north-finding instrument assembly. An IMU (Inertial Measurement Unit) is fixedly installed at the front end of the north-finding instrument assembly. A first adapter connector and a second adapter connector are provided at the upper front end of the cable harness fixing board. A fuse, a power supply connection, and a communication connector are respectively provided in the right shell cavity of the housing. A control circuit assembly is provided in the front shell cavity of the housing. A switching power supply is provided in the right shell cavity. A cable clip is provided at the upper end of the cable bracket.

[0005] Preferably, the display screen is located in the center of the upper left side of the housing, and the indicator light, signal switch and two power switches are arranged in a ring around the outside of the display screen. The indicator light is located at the upper rear of the display screen, the signal switch is located at the lower rear of the display screen, and the two power switches are symmetrically arranged at the upper front and lower front of the display screen, respectively.

[0006] Preferably, the compass component is installed at the center of the bottom of the housing by fastening screws, and the limiting block is fixedly connected to the middle of the left end of the compass component and extends toward the left side of the housing.

[0007] Preferably, the compass control board and the power board are fixed side by side at the front of the compass assembly, with the compass control board located on the left side and the power board located on the right side and adjacent to the compass control board. The IMU inertial measurement unit is fixedly installed on the left front end of the compass assembly.

[0008] Preferably, the cable clip has a semi-circular arc shape.

[0009] Preferably, the compass control board is electrically connected to the IMU inertial measurement unit via a cable, and the power supply board is electrically connected to the switching power supply, the power supply connection, and the fuse via cables.

[0010] Preferably, the control circuit assembly is electrically connected to the display screen, indicator lights, signal switches, and power switches via cables.

[0011] Preferably, the first adapter connector and the second adapter connector are electrically connected to the compass control board and power board via wiring harnesses, and the communication connector is electrically connected to the control circuit components via cables.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, the gyroscope and accelerometer data are collected in real time by the IMU inertial measurement unit. Combined with the latitude iteration equation and compensation algorithm of the north-finding instrument control board, the latitude value is estimated autonomously in the absence of satellite positioning signal, and the gravitational acceleration and horizontal attitude angle are corrected. This significantly expands the applicability of the device in complex environments and solves the problem that traditional north-finding instruments cannot work due to the lack of latitude information. 2. In this utility model, the sealed cavity formed by the shell and the cover plate provides protection. The internal components (power board, IMU unit) are fixed by optimized layout and fastening screws. Combined with the standardized wiring of cable clips and adapter connectors, signal interference and wiring clutter are reduced. At the same time, the independent power supply design of the power board, switching power supply and fuse improves the stability and reliability of the system and meets the installation requirements of confined spaces. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the overall structure of a fiber optic gyroscope north-finding device according to the present invention; Figure 2 This is a schematic diagram of the overall disassembled structure of a fiber optic gyroscope north-finding device according to the present invention; Figure 3 This is a detailed enlarged structural diagram of point A of the fiber optic gyroscope north-finding device of this utility model.

[0014] In the diagram: 1. Housing; 2. Cover plate; 3. Cable bracket; 4. Limit block; 5. Control circuit assembly; 6. Wiring harness fixing plate; 7. Compass control board; 8. Compass assembly; 9. IMU inertial measurement unit; 10. Power board; 11. Fuse; 12. Switching power supply; 13. Power supply connection; 14. Communication connector; 15. Display screen; 16. Power switch; 17. Signal switch; 18. Indicator light; 19. Cable clip; 20. First adapter connector; 21. Second adapter connector. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Please see Figure 1-3 This utility model provides a technical solution: A fiber optic gyroscope north-finding device includes a housing 1, a cover plate 2, and a cable bracket 3. The housing 1 and the cover plate 2 are fixedly connected by fastening screws to form a sealed cavity. A display screen 15 is fixedly connected to the upper left end of the housing 1. An indicator light 18, a signal switch 17, and two power switches 16 are respectively provided on the left end of the housing 1, and the indicator light 18, signal switch 17, and two power switches 16 are located around the outer perimeter of the display screen 15. A north-finding component 8 is fixedly installed at the bottom of the housing 1 by fastening screws, and the middle left end of the north-finding component 8 is fixed... The upper front part of the compass assembly 8 is fixedly connected to the limit block 4, the compass control board 7 and the power board 10 are fixedly connected respectively, the front end of the compass assembly 8 is fixedly installed with the IMU inertial measurement unit 9, the upper front part of the wire harness fixing plate 6 is provided with the first adapter connector 20 and the second adapter connector 21, the right shell cavity of the housing 1 is provided with the fuse 11, the power supply connection 13 and the communication connector 14 respectively, the front shell cavity of the housing 1 is provided with the control circuit assembly 5, the right shell cavity is provided with the switching power supply 12, and the upper end of the cable bracket 3 is provided with the cable clip 19.

[0019] In this embodiment, the display screen 15 is located in the center of the upper left side of the housing 1. Indicator lights 18, signal switches 17, and two power switches 16 are arranged in a ring around the outer perimeter of the display screen 15. The indicator lights 18 are located above and behind the display screen 15, the signal switches 17 are located below and behind the display screen 15, and the two power switches 16 are symmetrically positioned above and below the front of the display screen 15. The compass assembly 8 is installed at the center of the bottom of the housing 1 using fastening screws. The limiting block 4 is fixedly connected to the middle of the left end of the compass assembly 8 and extends towards the left side of the housing 1. The compass control board 7 and the power board 10 are fixed side-by-side at the front of the upper end of the compass assembly 8, with the compass control board 7 located on the left side. Board 10 is located on the right side and adjacent to the compass control board 7. The IMU (Inertial Measurement Unit) 9 is fixedly installed on the front left side of the compass assembly 8. The cable clip 19 has a semi-circular arc structure. The compass control board 7 is electrically connected to the IMU 9 via cables. The power board 10 is electrically connected to the switching power supply 12, fuse 11, and power supply connection 13 via cables. The control circuit assembly 5 is electrically connected to the display screen 15, indicator light 18, signal switch 17, and power switch 16 via cables. The first adapter connector 20 and the second adapter connector 21 are electrically connected to the compass control board 7 and the power board 10 via wiring harnesses. The communication connector 14 is electrically connected to the control circuit assembly 5 via cables. Through the above scheme: the sealed cavity formed by the housing 1 and the cover plate 2 provides protection for the internal components. The display screen 15, located in the center of the upper left end of the housing 1, is used to display the north-finding data in real time. The indicator lights 18 arranged in a ring around its outer perimeter, the signal switch 17, and two power switches 16 symmetrically arranged at the upper front and lower front, facilitate the operator's intuitive monitoring and convenient control of the equipment's start-up, shutdown, and signal switching. The north-finding instrument component 8 is installed in the center of the bottom of the housing 1 by fastening screws. The limiting block 4 extending to the left side of its left end can accurately position the component installation position. The north-finding instrument control board 7, which is fixed side by side at the upper front, is arranged adjacent to the left side of the power board 10. The IMU (Inertial Measurement Unit) 9 on the left front end collects raw data from the gyroscope and accelerometer in real time and transmits it to the compass control board 7 via cable for compensation processing. Simultaneously, the power board 10 is electrically connected via cable to the switching power supply 12, fuse 11, and power supply connection 13 in the right shell cavity, providing stable power to the entire system. The control circuit assembly 5 in the front shell cavity is connected via cable to the display screen 15, indicator light 18, signal switch 17, and power switch 16, enabling human-machine interaction control. The first adapter connector 20 and the second adapter connector 21 on the upper front of the wiring harness fixing plate 6 are electrically connected to the compass control board 7 and the power board 10 via wiring harnesses. The right shell cavity... The communication connector 14 is electrically connected to the control circuit assembly 5 via a cable, ensuring smooth internal data transmission and external communication. The semi-circular cable clip 19 at the upper end of the cable bracket 3 organizes and secures the cables, preventing messy wiring from affecting equipment operation. This solution improves operational convenience through the circular layout design of the display screen 15, indicator lights 18, signal switches 17, and two power switches 16 of each component. The electrical connection between the compass control board 7 and the IMU inertial measurement unit 9 enables the acquisition and processing of raw data. The connection between the power board 10, the power supply module fuse 11, the power supply connection 13, and the switching power supply 12 ensures power supply. The electrical connection between component 5 and the display and control components enables human-machine interaction. Then, through the adapter connectors 1-20, 21-21, and 14, a complete circuit connection system is constructed. Finally, without an initial position value, the latitude value is estimated iteratively by the data output from the gyroscope and accelerometer. After correction by the latitude iteration equation, the gravitational acceleration and horizontal attitude angle are calculated and accurately output. This not only realizes the autonomy and intelligence of the north-finding function, but also improves the dustproof and waterproof performance of the equipment through the sealed cavity structure, reduces signal interference through the compact modular layout, and enhances system stability through optimized circuit connections, thereby significantly improving the north-finding accuracy and equipment reliability.

[0020] It should be noted that this utility model is a fiber optic gyroscope north-finding device. When this device is in operation, the north-finding component 8 is installed in the sealed cavity formed by the housing 1 and the cover plate 2, at the center of the bottom of the housing 1 via bottom fastening screws. The limiting block 4 at the center of its left end extends to the left. The north-finding control board 7 is fixed side-by-side at the front of the upper part, on the left and right sides of the power board 10. The IMU (Inertial Measurement Unit) 9 at the front left collects the raw data from the gyroscope and accelerometer. After compensation processing by the north-finding control board 7, a latitude iterative equation is established. The latitude estimate is obtained through iterative correction using the gyroscope output and attitude angle information. Based on this, the gravitational acceleration and horizontal attitude angle are recalculated, and the control circuit group... Component 5 interacts with the display screen 15 centered on the upper left end and the indicator lights 18, signal switch 17 and two power switches 16 distributed in a ring around the outside via cables. At the same time, the power board 10 is electrically connected to the switching power supply 12, fuse 11 and power supply connection 13 in the right shell cavity via cables. The first adapter connector 20 and the second adapter connector 21 on the wire harness fixing plate 6 are connected to the north compass control board 7 and the power board 10 via wire harnesses. The communication connector 14 is connected to the control circuit assembly 5 to realize data communication. The semi-circular cable clip 19 at the upper end of the cable bracket 3 organizes the cables, so that when there is no initial position value, the estimated latitude value is output by the gyroscope and accelerometer to complete the north search and accurately output the angle value.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fiber optic gyroscope north-finding device, comprising a housing (1), a cover plate (2), and a cable support (3), characterized in that: The housing (1) and the cover plate (2) are fixedly connected by fastening screws to form a sealed cavity. A display screen (15) is fixedly connected to the upper left end of the housing (1). An indicator light (18), a signal switch (17), and two power switches (16) are respectively provided on the left end of the housing (1). The indicator light (18), the signal switch (17), and the two power switches (16) are located around the outer perimeter of the display screen (15). A compass assembly (8) is fixedly installed at the bottom of the housing (1) by fastening screws. A limit block (4) is fixedly connected to the middle left end of the compass assembly (8). The upper front part of the 8) is fixedly connected to the compass control board (7) and the power board (10). The front end of the compass assembly (8) is fixedly installed with the IMU inertial measurement unit (9). The upper front part of the wire harness fixing plate (6) is provided with the first adapter connector (20) and the second adapter connector (21). The right shell cavity of the housing (1) is provided with the fuse (11), the power supply connection (13) and the communication connector (14). The front shell cavity of the housing (1) is provided with the control circuit assembly (5). The right shell cavity is provided with the switching power supply (12). The upper end of the cable bracket (3) is provided with the cable clip (19).

2. The fiber-optic gyroscope north seeker apparatus of claim 1, wherein: The display screen (15) is located in the center of the upper left side of the housing (1). The indicator light (18), signal switch (17) and two power switches (16) are arranged in a ring around the outside of the display screen (15). The indicator light (18) is located above the rear of the display screen (15), the signal switch (17) is located below the rear of the display screen (15), and the two power switches (16) are symmetrically arranged above and below the front of the display screen (15).

3. The fiber-optic gyroscope north seeker apparatus of claim 1, wherein: The compass assembly (8) is installed at the bottom center of the housing (1) by fastening screws, and the limiting block (4) is fixedly connected to the middle of the left end of the compass assembly (8) and extends toward the left side of the housing (1).

4. The fiber-optic gyroscope north seeker apparatus of claim 1, wherein: The compass control board (7) and the power board (10) are fixed side by side at the front of the compass assembly (8), with the compass control board (7) located on the left side and the power board (10) located on the right side and adjacent to the compass control board (7). The IMU inertial measurement unit (9) is fixedly installed on the left front end of the compass assembly (8).

5. The fiber-optic gyroscope north seeker apparatus of claim 1, wherein: The cable clip (19) has a semi-circular arc structure.

6. The fiber-optic gyroscope north seeker apparatus of claim 1, wherein: The compass control board (7) is electrically connected to the IMU inertial measurement unit (9) via a cable, and the power board (10) is electrically connected to the switching power supply (12), the fuse (11) and the power supply connection (13) via cables.

7. The fiber-optic gyroscope north seeker apparatus of claim 1, wherein: The control circuit assembly (5) is electrically connected to the display screen (15), indicator light (18), signal switch (17), and power switch (16) via cables.

8. The fiber-optic gyroscope north seeker apparatus of claim 1, wherein: The first adapter connector (20) and the second adapter connector (21) are electrically connected to the compass control board (7) and the power board (10) via wire harnesses, and the communication connector (14) is electrically connected to the control circuit assembly (5) via cable.

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