CN114111753B - A fiber optic gyro north finder - Google Patents
A fiber optic gyro north finder Download PDFInfo
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- CN114111753B CN114111753B CN202111616736.8A CN202111616736A CN114111753B CN 114111753 B CN114111753 B CN 114111753B CN 202111616736 A CN202111616736 A CN 202111616736A CN 114111753 B CN114111753 B CN 114111753B
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- 239000000835 fiber Substances 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 claims description 43
- 230000007306 turnover Effects 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 8
- 239000013307 optical fiber Substances 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C17/00—Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
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- Radar, Positioning & Navigation (AREA)
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- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Gyroscopes (AREA)
Abstract
本发明涉及一种光纤陀螺寻北仪，包括：主机和惯性组合体；所述主机包括支撑架、双轴转位机构、水准器、棱镜和硬件电路；所述双轴转位机构固定设置在所述支撑架上，所述惯性组合体固定设置在所述双轴转位机构上；所述水准器固定设置在所述支撑架上，基于所述水准器对所述支撑架进行水平校正；所述双轴转位机构带动所述惯性组合体进行转动和翻转；所述惯性组合体获取多个位置处地球自转角速率；所述硬件电路设置在所述双轴转位机构上，所述硬件电路基于各所述地球自转角速率得到偏北角，并通过所述棱镜的镜面法线进行引出。本发明能能有效提高仪器的稳定性和使用效率。
The present invention relates to a fiber optic gyro north finder, comprising: a host and an inertial assembly; the host comprises a support frame, a dual-axis transfer mechanism, a leveler, a prism and a hardware circuit; the dual-axis transfer mechanism is fixedly arranged on the support frame, and the inertial assembly is fixedly arranged on the dual-axis transfer mechanism; the leveler is fixedly arranged on the support frame, and the support frame is horizontally corrected based on the leveler; the dual-axis transfer mechanism drives the inertial assembly to rotate and flip; the inertial assembly obtains the earth's rotation angular rate at multiple positions; the hardware circuit is arranged on the dual-axis transfer mechanism, and the hardware circuit obtains the north angle based on each of the earth's rotation angular rates, and leads out through the mirror normal of the prism. The present invention can effectively improve the stability and use efficiency of the instrument.
Description
Technical Field
The invention relates to the technical field of north seeking measurement, in particular to a fiber-optic gyroscope north seeking instrument.
Background
The gyro north seeker is an instrument for measuring the meridian direction (true north direction) of the point where the carrier is located by measuring the rotation angular velocity of the earth by using the basic characteristics of the gyro. The main characteristics are that: the method has the advantages of high orientation precision, short measurement time, no limitation of weather conditions and automatic orientation at any time and place (except high latitude areas). With the progress of inertial technology, electronic technology, computer technology and other technologies, gyroscopes north seekers are becoming widely used in both military and civilian orientation fields.
Strictly speaking, any inertial-stage gyroscope can sense the rotation angular rate of the earth, and each gyroscope can complete north-seeking measurement by adopting various methods. Regardless of the north-seeking method, after the gyro north-seeking instrument finishes the north-seeking measurement, the direction indicated by the gyro sensitive axis is transmitted to realize the extraction of the north-seeking measurement result. Since the theoretical input shaft of most gyroscopes cannot be directly and accurately measured and led out by a simple method, only a base surface with stable relation with the theoretical axis of the gyroscope can be determined on the gyroscope north seeker, the normal direction of the base surface represents the theoretical axis of the gyroscope, and the deviation between the normal of the base surface and the theoretical axis of the gyroscope is obtained by comparing the normal direction of the base surface with an external astronomical azimuth reference, and the deviation value is called an instrument constant. Therefore, the gyro north seeker belongs to a relative measuring instrument, and has a systematic deviation (instrument constant), and the algebraic sum of the measuring result of the gyro north seeker and the instrument constant is the final north seeker result.
The instrument constant is an important technical index of the gyro north seeker, and the stability of the gyro north seeker directly influences the precision and reliability of the north seeker result. If the instrument constant is unstable, the performance of the gyro north seeker is unstable, so that the performance of the gyro north seeker is reduced, and even the use function is lost. The instrument constants must be calibrated by an external astronomical azimuth reference before shipment. In order to make the north-seeking result more reliable, the gyro north-seeking instrument is usually also used for calibrating instrument constants before measurement. The calibration accuracy of the instrument constant is not only related to the instrument accuracy, reliability, operation of measuring staff, latitude of calibration place and observation environment condition, but also has close relation with the accuracy of astronomical azimuth reference, for which the instrument constant needs to be periodically checked. When the instrument is used in a measuring area, the astronomical azimuth reference used for calibrating the instrument constant can be considered to be unchanged, and the azimuth angle measured by the gyro north seeker is mainly related to whether the structural parameters of the north seeker are changed or not and the north seeker measurement error. The precision and reliability of instrument constants directly influence the precision and reliability of north seeking results, and are main factors causing the performance degradation of the gyro north seeker.
The instrument constant is repeatedly checked in the use process of the gyro north seeker, so that the use efficiency of the instrument is reduced.
Disclosure of Invention
In view of the above, the invention provides a fiber optic gyroscope north seeker, which does not need to correct instrument constants through external astronomical azimuth references, does not need to calibrate instrument constants in use, can effectively improve the stability and the use efficiency of the instrument, and can further realize the establishment and the transmission of high-precision azimuth references in all-weather, all-azimuth, accurate and rapid modes.
In order to achieve the above object, the present invention provides the following solutions:
a fiber optic gyroscope north seeker, comprising: a host and inertial assembly;
The host comprises a support frame, a double-shaft indexing mechanism, a level, a prism and a hardware circuit;
The double-shaft indexing mechanism is fixedly arranged on the support frame, and the inertia assembly is fixedly arranged on the double-shaft indexing mechanism;
the leveling instrument is fixedly arranged on the supporting frame, and the supporting frame is horizontally corrected based on the leveling instrument;
The double-shaft indexing mechanism drives the inertia assembly to rotate and turn over;
The inertial assembly acquires the rotation angular velocity of the earth at a plurality of positions;
the hardware circuit is arranged on the double-shaft indexing mechanism, obtains a north-offset angle based on each earth rotation angle rate, and leads out the north-offset angle through the mirror surface normal of the prism.
Preferably, the host further comprises: a housing;
The shell is fixed on the supporting frame through screws.
Preferably, the host further comprises an electrical interface and an electrical slip ring;
the external circuit is connected with the hardware circuit through the electrical interface;
the electric slip ring is positioned between the electric interface and the hardware circuit and is fixedly arranged on the supporting frame, and the electric slip ring prevents the double-shaft indexing mechanism from winding in the rotating or overturning process.
Preferably, the optical fiber gyro north seeking further comprises: leveling seats;
the leveling seat is fixedly connected with the supporting frame through screws, and the leveling seat carries out horizontal correction on the supporting frame.
Preferably, the leveling base includes: an upper seat, an adjusting screw mechanism and a lower seat;
The upper seat is fixedly connected with the supporting frame through a screw;
The adjusting screw mechanism is respectively connected with the upper seat and the lower seat, and the support frame is horizontally corrected by adjusting the adjusting screw mechanism.
Preferably, the dual-axis indexing mechanism comprises: azimuth shafting and turnover shafting;
The inertial assembly is arranged on the turnover shaft system, the turnover shaft system is arranged on the azimuth shaft system, and the azimuth shaft system is fixedly arranged on the support frame;
The turning shaft system drives the inertia assembly to turn over, and the azimuth shaft system drives the turning shaft system and the inertia assembly to rotate simultaneously;
The turnover shaft system has a turnover angle limiting function; the azimuth shafting rotates and is fixed in azimuth through the locking mechanism.
Preferably, the optical fiber gyro north seeking further comprises: a display; the inertial assembly comprises an accelerometer and a gyroscope;
The gyroscope acquires the rotation angular rate of the earth at a plurality of positions;
the accelerometer acquires a pitch angle of the inertial assembly, and the hardware circuit sends the pitch angle to the display for display;
And performing a horizontal correction based on the pitch angle and the level gauge.
Preferably, the number of levels is 2, positioned as a first level and a second level, respectively;
the first level and the second level are arranged on the support frame in a mutually perpendicular mode on a horizontal plane.
Preferably, the fiber-optic gyroscope further comprises a first motor and a second motor;
the hardware circuit controls the azimuth shafting to rotate through the first motor;
the hardware circuit controls the turnover shaft system to turn through the second motor.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
The invention relates to a fiber-optic gyroscope north seeker, comprising: a host and inertial assembly; the host comprises a support frame, a double-shaft indexing mechanism, a level, a prism and a hardware circuit; the double-shaft indexing mechanism is fixedly arranged on the support frame, and the inertia assembly is fixedly arranged on the double-shaft indexing mechanism; the leveling instrument is fixedly arranged on the supporting frame, and the supporting frame is horizontally corrected based on the leveling instrument; the double-shaft indexing mechanism drives the inertia assembly to rotate and turn over; the inertial assembly acquires the rotation angular velocity of the earth at a plurality of positions; the hardware circuit is arranged on the double-shaft indexing mechanism, obtains a north-offset angle based on each earth rotation angle rate, and leads out the north-offset angle through the mirror surface normal of the prism. The invention can effectively improve the stability and the use efficiency of the instrument.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of a fiber optic gyroscope north seeker of the present invention;
FIG. 2 is a perspective view of a host of the present invention;
FIG. 3 is a block diagram of a leveling base of the present invention;
FIG. 4 is a schematic view of the perimeter pointing of the gyroscope of the present invention.
Symbol description: 1-host, 2-leveling seat, 3-inertial assembly, 11-shell, 12-support frame, 13-double-shaft indexing mechanism, 14-first level, 15-prism, 16-hardware circuit, 17-second level, 18-electric interface, 19-electric slip ring, 21-upper seat, 22-adjusting screw mechanism, 23-lower seat, 31-first reference shaft, 32-second reference shaft and 33-sensitive shaft.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide the optical fiber gyroscope north seeker, which does not need to correct instrument constants through external astronomical azimuth references, does not need to calibrate the instrument constants in use, can effectively improve the stability and the use efficiency of the instrument, and can further realize the establishment and the transmission of high-precision azimuth references in all weather, all directions, accuracy and rapidness.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
FIG. 1 is a diagram of a fiber optic gyroscope north seeker of the present invention. As shown in the figure, the invention provides a fiber-optic gyroscope north seeker, which comprises: host 1, leveling seat 2 and inertial assembly 3.
As shown in fig. 2, the host 1 includes a housing 11, a support frame 12, a biaxial indexing mechanism 13, a level gauge, a prism 15, an electrical interface 18, an electrical slip ring 19, a display, and hardware circuitry 16.
The double-shaft indexing mechanism 13 is fixedly arranged on the supporting frame 12, and the inertia assembly 3 is fixedly arranged on the double-shaft indexing mechanism 13. The inertial assembly 3 comprises an accelerometer and a gyroscope.
Preferably, the biaxial indexing mechanism 13 includes: azimuth shafting and turnover shafting;
the inertial assembly 3 is mounted on the turning shaft system, the turning shaft system is mounted on the azimuth shaft system, and the azimuth shaft system is fixedly arranged on the support frame 12.
The turning shaft system drives the inertia assembly 3 to turn over, and the azimuth shaft system drives the turning shaft system and the inertia assembly 3 to rotate simultaneously.
The turnover shaft system has a turnover angle limiting function; the azimuth shafting rotates and is fixed in azimuth through the locking mechanism.
Further, the hardware circuit 16 controls the azimuth axis to rotate through a first motor; the hardware circuit 16 controls the turning shaft system to turn through the second motor.
The housing 11 is fixed to the support frame 12 by screws.
The number of levels is 2 and is positioned as a first level 14 and a second level 17, respectively.
The first level 14 and the second level 17 are arranged on the support frame 12 perpendicularly to each other in a horizontal plane.
The accelerometer acquires the pitch angle of the inertial assembly 3, and the hardware circuit 16 sends the pitch angle to the display for display.
The leveling seat 2 is fixedly connected with the support frame 12 through screws, and the leveling seat 2 carries out horizontal correction on the support frame 12.
Preferably, as shown in fig. 3, the leveling base 2 includes: an upper seat 21, an adjusting screw mechanism 22 and a lower seat 23.
The upper seat 21 is fixedly connected with the supporting frame 12 through screws.
The adjusting screw mechanism 22 is connected to the upper seat 21 and the lower seat 23, respectively.
Further, the adjusting screw mechanism 22 includes a first adjusting screw, a second adjusting screw, and a third adjusting screw. The first adjusting screw, the second adjusting screw and the third adjusting screw are uniformly distributed and have the same radius.
Based on the pitch angle, the first level 14 and the second level 17, the support frame 12 is then corrected horizontally by adjusting the first adjusting screw, the second adjusting screw and the third adjusting screw.
External wiring is connected to the hardware circuit 16 through the electrical interface 18.
The electrical slip ring 19 is located between the electrical interface 18 and the hardware circuit 16 and is fixedly disposed on the support frame 12, and the electrical slip ring 19 prevents the dual-axis indexing mechanism 13 from winding during rotation or overturning.
The double-shaft indexing mechanism 13 drives the inertial assembly 3 to rotate and turn. The gyroscope is an optical fiber gyroscope.
The gyroscope obtains the earth rotation angular rate at a plurality of locations.
The hardware circuit 16 is provided on the biaxial indexing mechanism 13, and the hardware circuit 16 obtains a north-offset angle based on each of the earth rotation angular rates and leads out the north-offset angle through a mirror surface normal line of the prism 15.
In this embodiment, the rotation angular rate of the earth at 4 positions is obtained, specifically as follows:
the axes of the gyroscope are a first reference axis 31, a second reference axis 32 and a sensitive axis 33, respectively, as shown in fig. 4.
In the first measurement, the first reference axis 31 is upward, the second reference axis 32 is directed to the approximately east direction, the sensitive axis 33 is directed to the approximately north direction, the first reference axis 31, the second reference axis 32 and the sensitive axis 33 form a plane right-hand coordinate system, and the components on the sensitive axis 33 at this time are read to obtain a first earth rotation angular rate.
After the north seeking measurement is completed at the position in the first measurement, the second motor drives the turnover shaft system to rotate. When the turning shaft system turns 180 degrees, the turning angle limiting function is started, the second motor stops working and self-locks, reaches a second measurement position, starts to perform second measurement, at the moment, the first reference shaft 31 points downwards, the second reference shaft 32 points to the approximately east direction, the sensitive shaft 33 points to the approximately south direction, and the component on the sensitive shaft 33 at the moment is read to obtain a second earth rotation angular rate.
After the north seeking measurement is completed at the second measurement position, the first motor drives the azimuth shafting to rotate, and the angle value of the output rotation position is measured in real time. And when the azimuth shafting rotates by 180 degrees, the locking mechanism locks the azimuth shafting, the azimuth shafting reaches a third measurement position, and the third measurement is started. At this time, the first reference axis 31 points downward, the second reference axis 32 points to the approximate western direction, and the sensitive axis 33 points to the approximate north direction, and the component on the sensitive axis 33 is read at this time, so as to obtain the third earth rotation angular rate.
And after the north seeking measurement is completed at the third measurement position, the second motor drives the turnover shaft system to rotate. When the turnover shaft system turns 180 degrees, the turnover angle limiting function is started, the second motor stops working and is self-locked, the second motor reaches the fourth measurement position, and the fourth measurement is started. At this time, the first reference axis 31 points upward, the second reference axis 32 points to a generally western direction, and the sensitive axis 33 points to a generally southern direction, and the component on the sensitive axis 33 is read at this time to obtain a fourth earth rotation angular rate.
After the north seeking measurement is completed at the fourth measurement position, the first motor drives the azimuth shafting to rotate, and the angle value of the output rotation position is measured in real time. And when the azimuth shafting rotates by 180 degrees, the locking mechanism locks the azimuth shafting, and returns to the initial position to finish measurement.
Calculating through the first earth rotation angular rate, the second earth rotation angular rate, the third earth rotation angular rate and the fourth earth rotation angular rate to obtain the north offset angle, wherein a calculation formula is as follows:
Wherein: omega e is the earth straight rotation angle rate, omega 1x is the first earth rotation angle rate, omega 2x is the second earth rotation angle rate, omega 3x is the third earth rotation angle rate, omega 4x is the fourth earth rotation angle rate, For the general longitude and latitude, ψ is the north-offset angle.
The north seeker performs constant calibration before leaving the factory, by means of known north reference and utilizing the angle measurement and output function of the azimuth axis system, a stable azimuth angle relation between the mirror surface normal line of the prism 15 and the sensitive axis 33 of the gyroscope is established, after calibration is completed, the mirror surface normal line of the prism 15 is used as a north seeking result output shaft, the stable azimuth angle relation between the mirror surface normal line of the prism 15 and the sensitive axis 33 of the gyroscope is known, the north offset angle is obtained, and the north offset angle can be converted into the true north angle of the mirror surface normal line of the prism 15, so that the measurement of the true north direction is realized.
The invention has the following beneficial effects:
1) The high-precision optical fiber gyroscope is used as a sensor for sensing the earth rotation angular rate, the attitude angle of the optical fiber gyroscope is measured by using an accelerometer, and the influence of the structural instrument constant on the measurement result is eliminated by adopting a four-position and turnover combined measurement mode.
2) Under the condition of no external assistance, the high-precision azimuth reference establishment and transmission can be realized, and simultaneously, the attitude angle and the local latitude of the carrier can be precisely measured.
3) The measuring result does not need to correct the instrument constant by an external astronomical azimuth reference, the instrument constant is not necessarily calibrated in use, and the stability and the use efficiency of the instrument can be effectively improved.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the above examples being provided only to assist in understanding the device and its core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (9)
1. A fiber optic gyroscope north seeker, comprising: a host and inertial assembly;
The host comprises a support frame, a double-shaft indexing mechanism, a level, a prism and a hardware circuit;
The double-shaft indexing mechanism is fixedly arranged on the support frame, and the inertia assembly is fixedly arranged on the double-shaft indexing mechanism;
the leveling instrument is fixedly arranged on the supporting frame, and the supporting frame is horizontally corrected based on the leveling instrument;
The double-shaft indexing mechanism drives the inertia assembly to rotate and turn over;
The inertial assembly acquires the rotation angular velocity of the earth at a plurality of positions;
The hardware circuit is arranged on the double-shaft indexing mechanism, obtains a north-offset angle based on each earth rotation angular rate, and leads out the north-offset angle through the mirror surface normal of the prism;
The double-shaft indexing mechanism comprises an azimuth shafting and an overturning shafting, the inertia assembly comprises a gyroscope, and the optical fiber gyroscope north seeker further comprises a first motor and a second motor;
The method for acquiring the rotation angular velocity of the earth at a plurality of positions comprises the following steps:
each axis of the gyroscope is a first reference axis, a second reference axis and a sensitive axis respectively;
In the first measurement, the first reference axis is upwards, the second reference axis points to the approximate east direction, the sensitive axis points to the approximate north direction, the first reference axis, the second reference axis and the sensitive axis form a plane right-hand coordinate system, and the components on the sensitive axis at the moment are read to obtain a first earth rotation angular rate;
After the north seeking measurement is completed at the first measurement position, the second motor drives the turnover shaft system to rotate; when the turnover shaft system turns 180 degrees, the turnover angle limiting function is started, the second motor stops working and is self-locked, reaches a second measurement position, starts to perform second measurement, at the moment, the first reference shaft points downwards, the second reference shaft points to the approximately east direction, the sensitive shaft points to the approximately south direction, and the component on the sensitive shaft at the moment is read to obtain a second earth rotation angular rate;
after the north seeking measurement is completed at the second measurement position, the first motor drives the azimuth shafting to rotate, and the angle value of the output rotation position is measured in real time; when the azimuth shafting rotates by 180 degrees, the locking mechanism locks the azimuth shafting, reaches a third measurement position and starts to perform third measurement; at the moment, the first reference axis points downwards, the second reference axis points to the approximate western direction, the sensitive axis points to the approximate north direction, and the component on the sensitive axis is read at the moment to obtain a third earth rotation angular rate;
After the north seeking measurement is completed at the third measurement position, the second motor drives the turnover shaft system to rotate; when the turnover shaft system turns 180 degrees, the turnover angle limiting function is started, the second motor stops working and is self-locked, the second motor reaches a fourth measurement position, and the fourth measurement is started; at the moment, the first reference axis points upwards, the second reference axis points to the approximate western direction, the sensitive axis points to the approximate southern direction, and the component on the sensitive axis is read at the moment to obtain a fourth earth rotation angular rate;
After north seeking measurement is completed at the fourth measurement position, the first motor drives the azimuth shafting to rotate, and the angle value of the output rotation position is measured in real time; when the azimuth shafting rotates by 180 degrees, the locking mechanism locks the azimuth shafting and returns to the initial position to finish measurement;
Calculating through the first earth rotation angular rate, the second earth rotation angular rate, the third earth rotation angular rate and the fourth earth rotation angular rate to obtain the north offset angle, wherein a calculation formula is as follows:
Wherein: omega e is the earth straight rotation angle rate, omega 1x is the first earth rotation angle rate, omega 2x is the second earth rotation angle rate, omega 3x is the third earth rotation angle rate, omega 4x is the fourth earth rotation angle rate, For the general longitude and latitude, ψ is the north-offset angle.
2. The fiber optic gyroscope north finder of claim 1, wherein the host further comprises: a housing;
The shell is fixed on the supporting frame through screws.
3. The fiber optic gyroscope north seeker of claim 1 wherein the host further includes an electrical interface and an electrical slip ring;
the external circuit is connected with the hardware circuit through the electrical interface;
the electric slip ring is positioned between the electric interface and the hardware circuit and is fixedly arranged on the supporting frame, and the electric slip ring prevents the double-shaft indexing mechanism from winding in the rotating or overturning process.
4. The fiber optic gyroscope north seeker of claim 1, the fiber optic gyroscope north seeker is characterized by further comprising: leveling seats;
the leveling seat is fixedly connected with the supporting frame through screws, and the leveling seat carries out horizontal correction on the supporting frame.
5. The fiber optic gyroscope north finder of claim 4, wherein the leveling base includes: an upper seat, an adjusting screw mechanism and a lower seat;
The upper seat is fixedly connected with the supporting frame through a screw;
The adjusting screw mechanism is respectively connected with the upper seat and the lower seat, and the support frame is horizontally corrected by adjusting the adjusting screw mechanism.
6. The fiber optic gyroscope north finder of claim 1, wherein the biaxial indexing mechanism comprises: azimuth shafting and turnover shafting;
The inertial assembly is arranged on the turnover shaft system, the turnover shaft system is arranged on the azimuth shaft system, and the azimuth shaft system is fixedly arranged on the support frame;
The turning shaft system drives the inertia assembly to turn over, and the azimuth shaft system drives the turning shaft system and the inertia assembly to rotate simultaneously;
The turnover shaft system has a turnover angle limiting function; the azimuth shafting rotates and is fixed in azimuth through the locking mechanism.
7. The fiber optic gyroscope north seeker of claim 1, the fiber optic gyroscope north seeker is characterized by further comprising: a display; the inertial assembly comprises an accelerometer and a gyroscope;
The gyroscope acquires the rotation angular rate of the earth at a plurality of positions;
the accelerometer acquires a pitch angle of the inertial assembly, and the hardware circuit sends the pitch angle to the display for display;
And performing a horizontal correction based on the pitch angle and the level gauge.
8. The fiber optic gyroscope north seeker of claim 1 wherein the number of levels is 2, positioned as a first level and a second level, respectively;
the first level and the second level are arranged on the support frame in a mutually perpendicular mode on a horizontal plane.
9. The fiber optic gyroscope north seeker of claim 6, further comprising a first motor and a second motor;
the hardware circuit controls the azimuth shafting to rotate through the first motor;
the hardware circuit controls the turnover shaft system to turn through the second motor.
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| CN202111616736.8A CN114111753B (en) | 2021-12-27 | 2021-12-27 | A fiber optic gyro north finder |
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| CN202111616736.8A CN114111753B (en) | 2021-12-27 | 2021-12-27 | A fiber optic gyro north finder |
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| CN114608615A (en) * | 2022-03-21 | 2022-06-10 | 北京全信科工科技发展有限公司 | Rotatable inertial measurement unit of azimuth axis |
| CN116164586A (en) * | 2022-12-07 | 2023-05-26 | 西安现代控制技术研究所 | Assembly for accurate shooting calibration of target range |
| CN117629174B (en) * | 2024-01-25 | 2024-04-05 | 深圳市瑞芬科技有限公司 | Gyroscope north-seeking device based on induction earth rotation principle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN216483089U (en) * | 2021-12-27 | 2022-05-10 | 中国人民解放军61540部队 | Fiber-optic gyroscope north seeker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000249552A (en) * | 1999-02-26 | 2000-09-14 | Japan Aviation Electronics Industry Ltd | North seeking method and apparatus for implementing the method |
| CN111366144B (en) * | 2019-11-26 | 2023-07-28 | 北京计算机技术及应用研究所 | Multi-position north-seeking method for gyro north-seeking instrument |
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| CN216483089U (en) * | 2021-12-27 | 2022-05-10 | 中国人民解放军61540部队 | Fiber-optic gyroscope north seeker |
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