High-precision anti-interference gyro north seeker

Abstract

The utility model relates to a north seeking instrument related technical field especially, relates to a high accuracy anti -interference gyro north seeking instrument, including lower shell, one end of lower shell is connected with upper shell. This high accuracy anti -interference gyro north seeking instrument, through the setting of lower shell, upper shell, first screw, motor, wire pressing board, plate seat, bearing, main control board, limiting board, limiting block, second screw, connector, sealing groove, sealing ring, first fixed hole, second fixed hole, limit ring and limit groove, when motor drive plate seat, main control board and limiting board rotate, bearing can ensure the perpendicularity of rotation, avoid the new error of inclination introduction, at the same time, the limiting block of limiting board surface will slide along the limit groove opening direction, accurate constraint rotation track, and plate seat, main control board and limiting board are tightly connected through the second screw penetration second fixed hole, form the rigid whole without loosening, effectively avoid the measurement deviation, further stabilize north seeking accuracy, satisfy high accuracy scene use demand.

Description

Technical Field

[0001] This utility model relates to the technical field of north-finding instruments, and in particular to a high-precision anti-interference gyroscope north-finding instrument. Background Technology

[0002] A north-finding instrument is a high-precision measuring device that automatically determines true north by detecting geophysical characteristics. Its core value lies in providing a precise orientation reference for a carrier in the absence of external references. It is widely used in military, surveying, aerospace and other fields with stringent requirements for directional accuracy. A gyroscope north-finding instrument is a common type of north-finding instrument. It uses a gyroscope as its core sensing component and automatically calculates and outputs true north by detecting the Earth's rotation angular velocity.

[0003] However, existing gyroscope north finders generally suffer from installation errors and sensor zero drift. These fixed errors accumulate with usage time and temperature changes, affecting the accuracy of north finding. Gyroscope north finders cannot meet the needs of high-precision scenarios.

[0004] To address the aforementioned issues, a search revealed a patent with publication number CN102261914B that discloses a gyro-based north-finding instrument. The patent states that "a gyro-based north-finding instrument, also known as a meridian gyro or gyro compass, is a freely suspended gyro pendulum. It typically consists of a metal wire made of a constant-elastic alloy suspending a gyro housing containing a gyro motor, forming a free gyro constrained by gravity and free from other suspension friction. Under the influence of the Earth's horizontal rotation component, the gyro motor's rotation axis has the ability to tend towards the local meridian. By combining the gyro-based north-finding instrument with a theodolite, the instrument can be mounted on the theodolite to measure true north at a given point." Therefore, gyro-based north-finding instruments are commonly used in mining surveying, tunnel breakthroughs, and positioning and orientation measurements. Currently, commercially available gyro-based north-finding instruments mainly consist of a housing, a gyro pendulum cover suspended freely within the housing, an eyepiece system, and an objective lens system. The eyepiece system is directly connected to the cover. When adjusting the optical path, the cover needs to be installed correctly, at which point it encloses the objective lens system, making adjustment very difficult and resulting in low efficiency. Furthermore, in existing technologies, to power the gyro motor, multiple flexible guide wires made of special alloys are typically used to transmit external power to the gyro motor drive circuit inside the gyro housing. The gyroscope's own current-carrying capacity is insufficient to meet the starting requirements of a gyroscope motor. However, the gyroscope's operating principle does not allow for the use of a current-carrying wire capable of handling higher operating currents. Therefore, some systems employ power supply contacts connected in parallel with the current-carrying wire to increase the starting current. During gyroscope motor startup, a relatively large current is required. The current-carrying wire and power supply contacts jointly bear this initial current, with most of the current flowing through the power supply contacts to prevent the current-carrying wire from burning out. Once the gyroscope motor reaches its rated speed, the current decreases to a level that the current-carrying wire can withstand. At this point, the power supply contacts are disconnected, and the current is supplied solely by the current-carrying wire, thus initiating the measurement operation. The disadvantages of power supply devices with this structure are... The drawback is that when the contact resistance of the power supply contact is greater than the resistance of the guide wire, the guide wire will also burn out, resulting in poor reliability of the gyro north finder. Compared with the prior art, this invention has the following advantages: This invention connects the eyepiece system to the housing, which means that when adjusting the optical path, the outer cover does not need to be installed in place, and the objective lens system can be adjusted directly, making the adjustment of the optical path very easy and greatly improving work efficiency. However, existing gyro north finders generally have installation errors and sensor zero drift problems. These fixed errors will affect the accuracy of north finding as the usage time and temperature change accumulate, and the gyro north finder cannot meet the needs of high-precision scenarios.

[0005] In light of this, in-depth research into the aforementioned issues led to the creation of this case. Utility Model Content

[0006] The purpose of this invention is to provide a high-precision anti-interference gyroscope north finder to solve the problems of installation error and sensor zero drift that are common in existing gyroscope north finders mentioned in the background art. These fixed errors will affect the accuracy of north finding as the usage time and temperature change accumulate, and the gyroscope north finder cannot meet the usage requirements of high-precision scenarios.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-precision anti-interference gyroscope north-finding instrument, comprising a lower shell; One end of the lower shell is connected to the upper shell. A first screw is provided at one end of the lower shell, and a motor is installed at one end of the lower shell. A pressure plate is installed on one side of the lower shell. The output end of the motor is connected to a plate base. A main control board is installed on one side of the plate base. A limit plate is connected to one side of the main control board. A limit block is installed on one side of the limit plate. A second screw is provided at one end of the plate base. A connector is installed at one end of the upper shell. A first fixing hole is opened on the surface of the lower shell. A second fixing hole is opened on the surface of the plate base. A limit ring is installed inside the upper shell, and a limit groove is opened on the surface of the limit ring.

[0008] Preferably, a bearing is installed inside the upper shell, and the limiting plate is connected to the limiting ring through the bearing.

[0009] Preferably, two sets of pressure plates are provided, and the surface of the pressure plates is provided with a through groove. The lower shell and the upper shell are connected by a first screw.

[0010] Preferably, the surfaces of the lower shell and the upper shell are provided with first fixing holes, and the surfaces of the plate base, the main control board and the limiting plate are provided with second fixing holes.

[0011] Preferably, the plate base, the main control board, and the limiting plate are connected by a second screw, which can simultaneously pass through the second fixing hole opened on the surface of the plate base, the main control board, and the limiting plate.

[0012] Preferably, the limiting ring is fixedly installed on the inner wall of the upper shell, and the limiting block forms a sliding structure with the limiting ring through the limiting groove.

[0013] Preferably, a sealing groove is formed on one side surface of the lower shell, and a sealing ring is provided inside the sealing groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This high-precision anti-interference gyroscope north finder, through the setting of a lower shell, upper shell, first screw, motor, pressure plate, plate base, bearing, main control board, limit plate, limit block, second screw, connector, sealing groove, sealing ring, first fixing hole, second fixing hole, limit ring, and limit groove, ensures the verticality of the rotation when the motor drives the plate base, main control board, and limit plate to rotate, avoiding tilting and introducing new errors. At the same time, the limit block on the surface of the limit plate slides along the opening direction of the limit groove, accurately constraining the rotation trajectory. The plate base, main control board, and limit plate are connected by the second screw. The wires pass through the second fixing hole and are tightly connected to form a rigid whole without loosening, which effectively avoids measurement deviation, further stabilizes the north-finding accuracy, and meets the needs of high-precision application scenarios. Two sets of pressure plates on one side of the lower shell have through grooves to organize the wiring harnesses of the motor and main control board, avoid interference caused by wire tangling, and reduce interference from external electromagnetic signals to data acquisition. At the same time, the integrated structure shortens the signal transmission path and reduces the risk of signal attenuation and interference. The sealing groove on the surface of the lower shell has a built-in sealing ring, which can isolate the influence of external dust and moisture, prevent bearing jamming or short circuit of the main control board, and can adapt to more application scenarios. Attached Figure Description

[0015] Figure 1 This is a side view of the appearance structure of this utility model; Figure 2 This is a schematic diagram of the interlocking structure of the lower shell and the upper shell of this utility model; Figure 3 This is a schematic diagram of the mutual cooperation between the limiting ring and the limiting groove of this utility model; Figure 4 This is a schematic diagram of the interlocking structure of the lower shell and the sealing groove of this utility model; Figure 5 This is a schematic diagram of the structure of the limiting plate and the limiting block of this utility model.

[0016] In the diagram: 1. Lower shell; 2. Upper shell; 3. First screw; 4. Motor; 5. Pressure plate; 6. Plate base; 7. Bearing; 8. Main control board; 9. Limiting plate; 10. Limiting block; 11. Second screw; 12. Connector; 13. Sealing groove; 14. Sealing ring; 15. First fixing hole; 16. Second fixing hole; 17. Limiting ring; 18. Limiting groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-5 This utility model provides a technical solution: a high-precision anti-interference gyroscope north finder, including a lower shell 1; One end of the lower shell 1 is connected to the upper shell 2. A first screw 3 is provided at one end of the lower shell 1. A motor 4 is installed at one end of the lower shell 1. A pressure plate 5 is installed on one side of the lower shell 1. The output end of the motor 4 is connected to a board base 6. A main control board 8 is installed on one side of the board base 6. A limit plate 9 is connected to one side of the main control board 8. A limit block 10 is installed on one side of the surface of the limit plate 9. A second screw 11 is provided at one end of the board base 6. A connector 12 is installed at one end of the upper shell 2. An opening is made on the surface of the lower shell 1. There is a first fixing hole 15, and a second fixing hole 16 is opened on the surface of the plate base 6. A limit ring 17 is installed inside the upper shell 2, and a limit groove 18 is opened on the surface of the limit ring 17. Through the arrangement of the lower shell 1, upper shell 2, first screw 3, motor 4, pressure plate 5, plate base 6, bearing 7, main control board 8, limit plate 9, limit block 10, second screw 11, connector 12, first fixing hole 15, second fixing hole 16, limit ring 17 and limit groove 18, the motor 4 drives the plate base 6. When the base plate 6, main control board 8, and limit plate 9 rotate, the bearing 7 ensures the verticality of the rotation, avoiding tilting and introducing new errors. At the same time, the limit block 10 on the surface of the limit plate 9 slides along the opening direction of the limit groove 18, precisely constraining the rotation trajectory. The base plate 6, main control board 8, and limit plate 9 are tightly connected by the second screw 11 through the second fixing hole 16, forming a rigid whole without loosening, effectively avoiding measurement deviation, further stabilizing the north-finding accuracy, and meeting the needs of high-precision application scenarios. The two sets of pressure plates 5 on one side of the lower shell 1 have through grooves, which can organize the wiring harness of the motor 4 and the main control board 8, avoid the interference caused by the wiring harness tangling, and reduce the interference of external electromagnetic signals on data acquisition. At the same time, the integrated structure shortens the signal transmission path and reduces the risk of signal attenuation and interference. The sealing groove 13 on the surface of the lower shell 1 has a built-in sealing ring 14, which can isolate the influence of external dust and moisture, prevent the bearing 7 from jamming or the circuit of the main control board 8 from short-circuiting, and can adapt to more application scenarios.

[0019] Furthermore, a bearing 7 is installed inside the upper shell 2. The limiting plate 9 is connected to the limiting ring 17 through the bearing 7. With the setting of the bearing 7, the upper shell 2 has a reserved mounting groove that matches the outer ring of the bearing 7. The bearing 7 is fixed in the upper shell 2 by an interference fit. The rolling friction structure of the bearing 7 can greatly reduce the resistance when the limiting plate 9 rotates, reduce the load on the motor 4, avoid the fluctuation of rotation speed caused by uneven friction resistance, and ensure that the rotation process can proceed smoothly and at a uniform speed. This provides a reliable rotational basis for the subsequent sliding of the limiting block 10 in the limiting groove 18, and further reduces the sources of error.

[0020] Furthermore, two sets of pressure plates 5 are provided, and the surface of the pressure plates 5 is provided with a through groove. The lower shell 1 and the upper shell 2 are connected by the first screw 3. Through the setting of the pressure plates 5, the pressure plates 5 can bundle the wire harnesses of the motor 4 and the main control board 8, avoid the wire harnesses from getting tangled and causing interference, and reduce the interference of external electromagnetic signals on data acquisition.

[0021] Furthermore, the surfaces of the lower shell 1 and the upper shell 2 are provided with first fixing holes 15, and the surfaces of the plate base 6, the main control board 8 and the limiting plate 9 are provided with second fixing holes 16. By setting the first fixing holes 15, the connection position of the lower shell 1 and the upper shell 2 is more precise, ensuring that there is no misalignment or offset when the two are connected, avoiding the offset of the internal bearing 7 and the limiting ring 17 due to the deviation of the connection position, and improving the accuracy of north finding.

[0022] Furthermore, the base plate 6, main control board 8, and limit plate 9 are connected by a second screw 11. The second screw 11 can simultaneously pass through the second fixing holes 16 opened on the surfaces of the base plate 6, main control board 8, and limit plate 9. Through the setting of the second fixing holes 16, the second fixing holes 16 provide a precise positioning reference for the second screw 11, avoiding the offset of the second screw 11 during installation, ensuring that the installation positions of the base plate 6, main control board 8, and limit plate 9 are completely aligned, achieving a misaligned fit. At the same time, the second fixing holes 16 can guide the second screw 11 to apply clamping force evenly, so that the base plate 6, main control board 8, and limit plate 9 are tightly connected into a rigid whole, effectively preventing relative displacement of the three due to vibration and inertia during the rotation driven by the motor 4, ensuring coaxiality and stability during rotation, and improving the accuracy of north finding.

[0023] Furthermore, the limiting ring 17 is fixedly installed on the inner wall of the upper shell 2, and the limiting block 10 forms a sliding structure with the limiting ring 17 through the limiting groove 18. With the setting of the limiting block 10 and the limiting groove 18, the limiting block 10 can provide guidance for the plate base 6, the main control board 8 and the limiting plate 9 after it is embedded in the limiting groove 18. The inner wall of the limiting groove 18 can limit the displacement of the limiting block 10 in real time, avoid detection deviation caused by tilting or offset, and improve the accuracy of north finding.

[0024] Furthermore, a sealing groove 13 is provided on one side surface of the lower shell 1, and a sealing ring 14 is provided inside the sealing groove 13. Through the setting of the sealing groove 13 and the sealing ring 14, the sealing groove 13 on the surface of the lower shell 1 has a built-in sealing ring 14, which can isolate the influence of external dust and moisture, prevent the bearing 7 from jamming or the main control board 8 from short-circuiting, adapt to more usage scenarios, and extend the service life.

[0025] Working principle: When the motor 4 drives the base 6, main control board 8 and limit plate 9 to rotate, the bearing 7 can ensure the verticality of the rotation and avoid tilting to introduce new errors. At the same time, the limit block 10 on the surface of the limit plate 9 will slide along the opening direction of the limit groove 18 to accurately constrain the rotation trajectory. The base 6, main control board 8 and limit plate 9 are tightly connected by the second screw 11 through the second fixing hole 16 to form a rigid whole without loosening. The two sets of pressure plates 5 on one side of the lower shell 1 have through grooves to organize the wiring harness of the motor 4 and main control board 8. At the same time, the integrated structure shortens the signal transmission path and reduces the risk of signal attenuation and interference. The sealing groove 13 on the surface of the lower shell 1 has a built-in sealing ring 14 to isolate the influence of external dust and moisture.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision anti-interference gyroscope north finder, comprising a lower shell (1); Its features are: One end of the lower shell (1) is connected to the upper shell (2). A first screw (3) is provided at one end of the lower shell (1). A motor (4) is installed at one end of the lower shell (1). A pressure plate (5) is installed on one side of the lower shell (1). The output end of the motor (4) is connected to a plate base (6). A main control board (8) is installed on one side of the plate base (6). A limit plate (9) is connected to one side of the main control board (8). A limit block (10) is installed on one side of the limit plate (9). A second screw (11) is provided at one end of the plate base (6). A connector (12) is installed at one end of the upper shell (2). A first fixing hole (15) is opened on the surface of the lower shell (1). A second fixing hole (16) is opened on the surface of the plate base (6). A limit ring (17) is installed inside the upper shell (2). A limit groove (18) is opened on the surface of the limit ring (17).

2. The high-precision anti-interference gyro north seeker according to claim 1, characterized in that: The upper shell (2) is equipped with a bearing (7), and the limiting plate (9) is connected to the limiting ring (17) through the bearing (7).

3. The high-precision anti-interference gyro north seeker according to claim 1, characterized in that: The pressure plate (5) is provided in two sets, and the surface of the pressure plate (5) is provided with a through groove. The lower shell (1) and the upper shell (2) are connected by the first screw (3).

4. The high-precision anti-interference gyro north seeker according to claim 1, characterized in that: The surfaces of the lower shell (1) and the upper shell (2) are provided with first fixing holes (15), and the surfaces of the plate base (6), the main control board (8) and the limiting plate (9) are provided with second fixing holes (16).

5. The high-precision anti-interference gyro north seeker according to claim 1, characterized in that: The plate base (6), the main control board (8) and the limiting plate (9) are connected by a second screw (11), which can simultaneously pass through the second fixing hole (16) opened on the surface of the plate base (6), the main control board (8) and the limiting plate (9).

6. The high-precision anti-interference gyro north seeker according to claim 1, characterized in that: The limiting ring (17) is fixedly installed on the inner wall of the upper shell (2), and the limiting block (10) forms a sliding structure with the limiting ring (17) through the limiting groove (18).

7. The high-precision anti-interference gyro north seeker according to claim 1, characterized in that: A sealing groove (13) is provided on one side surface of the lower shell (1), and a sealing ring (14) is provided inside the sealing groove (13).

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