CN219914456U - Optical fiber gyroscope inertial measurement device for scout car mast - Google Patents
Optical fiber gyroscope inertial measurement device for scout car mast Download PDFInfo
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- CN219914456U CN219914456U CN202321177796.9U CN202321177796U CN219914456U CN 219914456 U CN219914456 U CN 219914456U CN 202321177796 U CN202321177796 U CN 202321177796U CN 219914456 U CN219914456 U CN 219914456U
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- 238000005259 measurement Methods 0.000 title claims abstract description 73
- 239000013307 optical fiber Substances 0.000 title claims abstract description 14
- 238000013016 damping Methods 0.000 claims abstract description 114
- 230000009467 reduction Effects 0.000 claims abstract description 17
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 69
- 238000009434 installation Methods 0.000 claims description 39
- 230000007704 transition Effects 0.000 claims description 27
- 238000001914 filtration Methods 0.000 description 5
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- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
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- 230000035939 shock Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
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Abstract
The utility model discloses an optical fiber gyroscope inertial measurement device for a scout car mast, and belongs to the field of inertial measurement devices. The vibration-damping pad mounting plate is of a square ring structure, four step holes are formed in the inner sides of four corners of the back surface of the square ring structure, four square bosses extend outwards from four corners of the square ring structure of the vibration-damping pad mounting plate, and through holes for mounting vibration-damping pads are formed in the bosses; the vibration-damping pad is made of silicon rubber and is of a round bench structure, a cylindrical boss extends out of the cylindrical seat, and a circular through hole penetrating through the center of the vibration-damping pad is formed in the vibration-damping pad; each through hole is provided with two vibration reduction pads, the two vibration reduction pads are opposite to each other, and an air layer is arranged between the cylindrical bosses of the two vibration reduction pads; the vibration damping pad mounting plate is fixed to the upper surface of the bottom plate by vibration damping pad fastening screws penetrating through the two vibration damping pad circular through holes. The utility model ensures the measurement precision of the device, saves space, improves the convenience of wiring and has stronger practicability.
Description
Technical Field
The utility model relates to the field of inertial measurement devices, in particular to a fiber optic gyroscope inertial measurement device for a scout car mast.
Background
The scout vehicle is a key device for acquiring battlefield information and is an important guarantee for modern war. In order to avoid shielding of obstacles such as buildings, trees and the like, the reconnaissance vehicle adopts mast type photoelectric equipment to realize remote reconnaissance. The mast is composed of multiple sections of rod bodies, each section is overlapped to reduce the height when the mast falls, and each section is stretched to improve the observation height when the mast is lifted. Gaps exist among all the sections of the mechanical structure of the mast, bending and deformation exist in the lifting process of the rod body, the higher the mast is, the larger the posture change exists at the top of the mast, and the posture change is also aggravated after lifting due to the influences of wind blowing, engine vibration and the like. If the posture change of the top of the mast caused by the bending deformation of the mast is inaccurately measured, the posture error of the photoelectric equipment arranged on the top of the mast is introduced in the calculation of the target coordinates, and finally the reconnaissance orientation precision of the reconnaissance vehicle is influenced. The current better method is to adopt an inertial measurement device to be arranged at the top of the mast, and dynamically measure the real-time attitude of the mast.
The fiber-optic gyroscope is an optical fiber angular velocity sensor based on the Sagnac effect principle, has the advantages of no movable part, no preheating time, insensitive acceleration, wide dynamic range, digital output, small volume and the like, and is one of the main stream gyroscopes used in the inertial measurement device at present, so the fiber-optic gyroscope inertial measurement device is the main stream inertial measurement device used for the mast of the scout vehicle at present. However, the fiber optic gyroscope inertial measurement device mounted on the top of the scout mast has the following problems during actual use:
(1) The scout car mast is influenced by wind blowing, engine vibration and the like after lifting, so that the fiber optic gyroscope inertial measurement device is in a vibration environment, and the measurement accuracy of the fiber optic gyroscope is influenced in the vibration environment;
(2) Other photoelectric equipment arranged at the top of the reconnaissance vehicle mast causes electromagnetic interference to the fiber-optic gyroscope in the fiber-optic gyroscope inertial measurement device to influence the measurement accuracy;
(3) The top installation space of the scout car mast is narrow, and the wiring process of the external socket is inconvenient because the optical fiber gyro inertial measurement device is electrically connected through a cable with a plug.
Disclosure of Invention
The utility model aims to solve the problems of an optical fiber gyro inertial measurement device arranged at the top of a mast of a scout car in the actual use process, and provides the optical fiber gyro inertial measurement device for the mast of the scout car, which has compact and reasonable overall layout, adopts good vibration resistance and electromagnetic interference resistance design, greatly reduces the influence of electromagnetic interference of a vibration environment and other photoelectric equipment on the optical fiber gyro, ensures the measurement accuracy of the device, simultaneously completes butt joint of a downward external socket and a plug arranged at the top mounting plate of the mast during the installation, saves space, improves the convenience of wiring and has stronger practicability.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the optical fiber gyro inertia measurement device for the scout car mast comprises an outer cover, an inertia measurement unit and a base, and is characterized by further comprising a shielding plate, a shielding cover, a shock pad and a shock pad mounting plate; the vibration-damping pad mounting plate is of a square ring structure, four step holes are formed in the inner sides of four corners of the back surface of the square ring structure, four square bosses extend outwards from four corners of the square ring structure of the vibration-damping pad mounting plate, and through holes for mounting vibration-damping pads are formed in the bosses;
the vibration reduction pad is made of silicon rubber, is of a round bench structure, extends out of a cylindrical boss on a cylindrical seat, and is provided with a circular through hole penetrating through the center of the vibration reduction pad;
the shielding plate is positioned on the lower surface of the base; the middle position of the base is provided with a mounting groove for accommodating the power supply module; the vibration reduction pad mounting plate is positioned on the upper surface of the base and surrounds the periphery of the power supply module; the body of the inertia measurement unit is fixed on the top of the vibration reduction pad mounting plate through a step hole reversely screwing screw; the shielding cover is fixed at the edge of the base and covers the outer side of the inertial measurement unit; the outer cover covers the outer side of the shielding cover and is fixed on the base;
each through hole is provided with two vibration reduction pads, the two vibration reduction pads are opposite to each other, and an air layer is arranged between the cylindrical bosses of the two vibration reduction pads; the vibration damping pad mounting plate is fixed to the upper surface of the bottom plate by vibration damping pad fastening screws penetrating through the two vibration damping pad circular through holes.
Further, the inertia measurement unit comprises a body, an X-direction fiber optic gyroscope, a Y-direction fiber optic gyroscope, a Z-direction fiber optic gyroscope, an X-direction accelerometer, a Y-direction accelerometer, a Z-direction accelerometer, a first signal acquisition and processing circuit board mounting transition piece, a second signal acquisition and processing circuit board mounting transition piece and a signal acquisition and processing circuit board;
the X-direction fiber optic gyroscope, the Y-direction fiber optic gyroscope and the Z-direction fiber optic gyroscope are respectively arranged on an orthogonal X-direction fiber optic gyroscope installation surface, a Y-direction fiber optic gyroscope installation surface and a Z-direction fiber optic gyroscope installation surface on the body; the X-direction accelerometer, the Y-direction accelerometer and the Z-direction accelerometer are respectively arranged on an X-direction accelerometer installation surface, a Y-direction accelerometer installation surface and a Z-direction accelerometer installation surface on an accelerometer installation boss on the body.
Further, the outer diameter of the cylindrical seat of the vibration damping pad is larger than the inner diameter of the through hole in the boss at the four corners of the vibration damping pad mounting plate, the outer diameter of the cylindrical boss of the vibration damping pad is smaller than the inner diameter of the through hole in the boss at the four corners of the vibration damping pad mounting plate, and the height of the cylindrical boss of the vibration damping pad is smaller than 1/2 of the height of the through hole in the boss at the four corners of the vibration damping pad mounting plate.
Further, a vibration dampening pad fastener is included; the damping pad fastener mainly comprises a damping pad fastening screw, a damping pad fastening elastic pad and a damping pad fastening flat pad; the damping pad fastening spring pad and the damping pad fastening flat pad are positioned between the damping pad fastening screw head and the damping pad, wherein the damping pad fastening spring pad is tightly adjacent to the damping pad fastening screw head.
Further, an external socket mounting groove is formed in the base and used for mounting an external socket; the appearance of shielding plate suits with the shielding plate mounting groove that the base bottom surface set up to be provided with the opening that makes the external socket pass through in the direction of corresponding external socket.
Further, the inertia measurement list also comprises a signal acquisition processing circuit board; the first signal acquisition and processing circuit board installation transition piece and the second signal acquisition and processing circuit board installation transition piece are installed on the right side of the body through screws, round bosses are arranged on the first signal acquisition and processing circuit board installation transition piece and the second signal acquisition and processing circuit board installation transition piece, screw holes are formed in the round bosses, and the signal acquisition and processing circuit board is installed on the round bosses of the first signal acquisition and processing circuit board installation transition piece and the second signal acquisition and processing circuit board through screws; the optical fiber gyroscope and the accelerometer are both connected to the signal acquisition and processing circuit board.
The beneficial effects of the utility model are as follows:
the utility model aims to provide a fiber optic gyroscope inertial measurement device for a scout car mast, which has the following effective effects compared with the prior art:
(1) Good vibration-resistant design: vibration damping pads are arranged between the base and the inertial measurement unit to attenuate vibration borne by three fiber-optic gyroscopes and three accelerometers on the inertial measurement unit, so that the measurement accuracy of the device is improved;
(2) Good anti-electromagnetic interference design: the shielding cover and the shielding plate seal the three fiber optic gyroscopes, the three accelerometers, the signal acquisition and processing circuit board and the power module in an approximately sealed magnetic shielding space, so that electromagnetic interference of the outside to electronic components comprising the three fiber optic gyroscopes is isolated, and the measurement precision of the device is improved;
(3) Wiring design of convenience: the external socket of the device is arranged on the bottom surface of the base, when the device is installed on the installation surface of the top of the scout car mast, the butt joint of the external socket of the device and the plug arranged on the installation surface of the top of the scout car mast is directly completed during installation, the space is saved, and the convenience of wiring is improved.
Drawings
FIG. 1 is a schematic illustration of the external form of a fiber optic gyroscope inertial measurement unit for a scout truck mast of the present utility model;
FIG. 2 is a schematic diagram of the components of a fiber optic gyroscope inertial measurement unit for a scout mast in accordance with the present utility model;
FIG. 3 is a schematic illustration of a fiber optic gyroscope inertial measurement unit for a scout mast of the present utility model with the housing and shield removed;
FIG. 4 is a schematic diagram of the components of an inertial measurement unit in a fiber optic gyroscope inertial measurement unit for a scout mast according to the present utility model;
FIG. 5 is a schematic view of the reverse side of a vibration dampening pad mounting plate in a fiber optic gyroscope inertial measurement unit for a scout vehicle mast of the present utility model;
FIG. 6 is a schematic illustration of the structure of a vibration damping pad in a fiber optic gyroscope inertial measurement unit for a scout truck mast according to the present utility model;
FIG. 7 is a schematic illustration of the installation of a vibration damping pad in a fiber optic gyroscope inertial measurement unit for a scout car mast according to the present utility model;
FIG. 8 is a schematic view of the back side of a base in a fiber optic gyroscope inertial measurement unit for a scout car mast according to the present utility model;
FIG. 9 is a schematic view of a shield plate in a fiber optic gyroscope inertial measurement unit for a scout truck mast according to the present utility model;
FIG. 10 is a schematic illustration of the structure of a housing in a fiber optic gyroscope inertial measurement unit for a scout car mast according to the present utility model;
FIG. 11 is a schematic diagram of the power distribution principle of a fiber optic gyroscope inertial measurement unit for a scout truck mast according to the present utility model;
FIG. 12 is a schematic signal flow diagram of a fiber optic gyroscope inertial measurement unit for a scout truck mast according to the present utility model;
wherein: 1. the housing, 2, the shielding case, 3, the inertial measurement unit, 301, the body, 302, the X-direction fiber optic gyro, 303, the Y-direction fiber optic gyro, 304, the Z-direction fiber optic gyro, 305, the X-direction accelerometer, 306, the Y-direction accelerometer, 307, the Z-direction accelerometer, 308, the first signal acquisition processing circuit board mounting transition piece, 309, the second signal acquisition processing circuit board mounting transition piece, 310, the signal acquisition processing circuit board, 3101, the program storage module, 3102, the digital signal processing module, 3103, the synchronization signal module, 3104, the user data format configuration module, 3105, the digital signal acquisition module, 3106, the X-direction accelerometer IF module, 3107, the Y-direction accelerometer IF module, 3108, Z-direction accelerometer IF module, 3109, RS422 interface module, 4, vibration damping pad mounting plate, 5, vibration damping pad (eight in total), 501, vibration damping pad with cylinder boss mounted downwards, 502, vibration damping pad with cylinder boss mounted upwards, 6, vibration damping pad fastener (four in total), 601, vibration damping pad fastening screw, 602, vibration damping pad fastening spring pad, 603, vibration damping pad fastening flat pad, 7, power module, 701, filtering module, 702, +24V signal acquisition and processing circuit board +5V module, 703, +24V accelerometer +15V module, 704, +24V fiber optic gyro +5V module, 8, base, 9, shielding plate, 10, external socket.
Detailed Description
An embodiment of the present utility model is described below with reference to the accompanying drawings.
An optical fiber gyro inertial measurement unit for a scout vehicle mast, structurally designed, see fig. 1-3, comprising: the device comprises a housing 1, a shielding cover 2, an inertial measurement unit 3, a damping pad mounting plate 4, damping pads 5 (eight in total), damping pad fasteners 6 (four in total), a power module 7, a base 8, a shielding plate 9 and an external socket 10.
Further, referring to fig. 4, the inertial measurement unit 3 includes: the device comprises a body 301, an X-direction fiber-optic gyroscope 302, a Y-direction fiber-optic gyroscope 303, a Z-direction fiber-optic gyroscope 304, an X-direction accelerometer 305, a Y-direction accelerometer 306, a Z-direction accelerometer 307, a first signal acquisition and processing circuit board mounting transition piece 308, a second signal acquisition and processing circuit board mounting transition piece 309 and a signal acquisition and processing circuit board 310.
Preferably, referring to fig. 3 and fig. 4, an X-direction fiber optic gyro 302, a Y-direction fiber optic gyro 303 and a Z-direction fiber optic gyro 304 are respectively mounted on an orthogonal X-direction fiber optic gyro mounting surface, a Y-direction fiber optic gyro mounting surface and a Z-direction fiber optic gyro mounting surface on a body 301, and in order to ensure the orthogonality of the three fiber optic gyroscopes, the flatness of the mounting surfaces of the three fiber optic gyroscopes is required to be 0.01mm, and the perpendicularity is required to be 0.01mm;
preferably, referring to fig. 3 and fig. 4, the X-direction accelerometer 305, the Y-direction accelerometer 306 and the Z-direction accelerometer 307 are respectively mounted on the X-direction accelerometer mounting surface, the Y-direction accelerometer mounting surface and the Z-direction accelerometer mounting surface on the accelerometer mounting boss on the body 301, so as to ensure the orthogonality of the three accelerometers, the flatness requirements of the three orthogonal mounting surfaces of the accelerometer mounting boss are 0.01mm, and the mutual perpendicularity requirements are 0.01mm;
preferably, referring to fig. 3 and 4, the first signal acquisition and processing circuit board mounting transition piece 308 and the second signal acquisition and processing circuit board mounting transition piece 309 are mounted on the right side of the body 301 by screws, cylindrical bosses are arranged on the first signal acquisition and processing circuit board mounting transition piece 308 and the second signal acquisition and processing circuit board mounting transition piece 309, screw holes are arranged on the bosses, the signal acquisition and processing circuit board 310 is mounted on the cylindrical bosses of the first signal acquisition and processing circuit board mounting transition piece 308 and the second signal acquisition and processing circuit board 309 by screws, and the height of the cylindrical bosses is higher than that of electronic devices on the signal acquisition and processing circuit board 310 to prevent the electronic devices from touching the body 301 to generate short circuit;
further, referring to fig. 5, the vibration-damping pad mounting plate 4 is a square ring structure, four step holes are formed on the inner sides of four corners of the reverse side of the square ring structure, and the body 301 of the inertia measurement unit 3 is fixed on the vibration-damping pad mounting plate 4 by reversely screwing screws through the step holes; meanwhile, four square bosses are outwards extended from four corners of the square ring structure of the vibration damping pad mounting plate 4, and circular through holes are formed in the bosses and are used for mounting the vibration damping pad 5;
further, referring to fig. 6, the vibration-damping pad 5 is made of silicone rubber, and is a structure in which a cylindrical boss extends out of a cylindrical seat, and a circular through hole is formed in the direction of the integral symmetry axis;
preferably, referring to fig. 7, the outer diameter of the cylindrical seat of the vibration damping pad 5 is larger than the inner diameter of the through holes in the bosses at four corners of the vibration damping pad mounting plate 4, the outer diameter of the cylindrical boss of the vibration damping pad 5 is slightly smaller than the inner diameter of the through holes in the bosses at four corners of the vibration damping pad mounting plate 4, and the height of the cylindrical boss of the vibration damping pad 5 is smaller than 1/2 of the height of the through holes in the bosses at four corners of the vibration damping pad mounting plate 4;
preferably, referring to fig. 7, the vibration-damping pad 5 is mounted in the following manner: firstly, a cylindrical boss of one vibration damping pad 5 is upwards counted as a vibration damping pad 502 with the cylindrical boss upwards installed, the cylindrical boss of the vibration damping pad 502 with the cylindrical boss upwards installed is plugged into through holes in bosses at four corners of a vibration damping pad mounting plate 4, another cylindrical boss of the vibration damping pad 5 is downwards counted as a vibration damping pad 501 with the cylindrical boss downwards installed, and the cylindrical boss of the vibration damping pad 501 with the cylindrical boss downwards installed is plugged into the through holes in bosses at four corners of the vibration damping pad mounting plate 4; then, the rest vibration damping pad 5 is sequentially plugged into through holes in bosses at four corners of the vibration damping pad mounting plate 4 in two modes of upward and downward of the cylindrical bosses; next, the damper pad fastener 6 is fastened with the corresponding screw hole of the base 8 through the circular through holes of the damper pad 501 mounted with the cylindrical boss facing downward and the damper pad 502 mounted with the cylindrical boss facing upward, thereby fastening the damper pad 5 and the damper pad mounting plate 4 on the base 8;
preferably, referring to fig. 7, the damper pad fastener 6 includes: the vibration damping cushion fastening screw 601, the vibration damping cushion fastening elastic cushion 602 and the vibration damping cushion fastening flat cushion 603, wherein the vibration damping cushion fastening flat cushion 603 is placed on the end face of the cylindrical seat of the vibration damping cushion 501 with the cylindrical boss facing downwards, the vibration damping cushion fastening elastic cushion 602 is placed on the vibration damping cushion fastening flat cushion 603, and the vibration damping cushion fastening screw 601 is placed on the vibration damping cushion fastening elastic cushion 602 and penetrates through the vibration damping cushion fastening elastic cushion 602 and the vibration damping cushion fastening flat cushion 603;
preferably, referring to fig. 7, the length of the screw of the damping pad fastening screw 601 is greater than the sum of the damping pad fastening spring pad height 602, the damping pad fastening flat pad height 603, the two damping pad 5 cylindrical seat heights and the damping pad mounting plate 4, so that the screw of the damping pad fastening screw 601 can penetrate through the damping pad fastening spring pad 602, the damping pad fastening flat pad 603, the two damping pad 5 cylindrical seats and the damping pad mounting plate 4 and then can be screwed into the threaded hole of the base 8;
further, referring to fig. 3 and 8, a power module mounting groove is formed in the top surface of the base 8 for mounting the power module 7, grooves are formed in four sides of the base 8 for mounting the outer cover 1, a shielding plate mounting groove is formed in the bottom surface of the base 8 for mounting the shielding plate 9, and an external socket mounting groove is formed in the base 8 for mounting the external socket 10;
further, referring to fig. 9, the shape of the shielding plate 9 is adapted to the shielding plate mounting groove arranged on the bottom surface of the base 8, and a notch is arranged in the direction corresponding to the external socket 10 so that the external socket 10 can pass through;
further, referring to fig. 10, the whole structure of the outer cover 1 is a square shell with an opening at the bottom, bosses which are adapted to the shapes of grooves formed on the four sides of the base 8 are extended on the four sides, and the outer cover 1 is fixed on the base 8 through screw holes on the bosses;
preferably, referring to fig. 3, the power module 7 is mounted on the base 8, and the mounting surface on the power module 7 is tightly attached to the base 8, so that the heat generated by the power module 7 can be quickly dissipated through conduction of the base 8, and the heat field in the heat generation changing device of the power module 7 is prevented from affecting the precision of the optical fiber gyro inertia measuring device;
preferably, referring to fig. 3, vibration damping pad 5 dampens vibration received by three fiber-optic gyroscopes and three accelerometers in a fiber-optic gyroscope inertial measurement device mounted on the top of a scout car mast, thereby improving measurement accuracy of the device in a scout car mast vibration environment;
preferably, the shielding cover 2 and the shielding plate 9 are made of 1J79 magnetic shielding material, and are subjected to magnetization treatment of vacuum high-temperature annealing after processing, the magnetized shielding cover 2 and the shielding plate 9 seal the three fiber-optic gyroscopes, the three accelerometers, the signal acquisition processing circuit board 310 and the power supply module 7 in an approximately sealed magnetic shielding space, so that electromagnetic interference of the outside to electronic components comprising the three fiber-optic gyroscopes is isolated, and the precision of the fiber-optic gyroscope inertial measurement device in an electromagnetic interference environment is ensured;
further, referring to fig. 1 to 4, the installation steps of the fiber optic gyroscope inertial measurement device for the scout car mast of the utility model are as follows: first, the assembly of the inertial measurement unit 3 is completed: three accelerometers are installed on an accelerometer installation boss in the body 301, three fiber optic gyroscopes are installed on a fiber optic gyroscope installation surface on the body 301, a first signal acquisition and processing circuit board installation transition piece 308 and a second signal acquisition and processing circuit board installation transition piece 309 are installed on the body 301, and a signal acquisition and processing circuit board 310 is installed on a cylindrical boss of the first signal acquisition and processing circuit board installation transition piece 308 and the second signal acquisition and processing circuit board transition piece 309; then, the power module 7 is mounted on the base 8; then, the vibration damping pad mounting plate 4 is mounted on the body 301 of the inertial measurement unit 3; next, the damper pad mounting plate 4 is fixed to the base 8 by the damper pad 5 and the damper pad fastener 6; then, the external socket 10 is mounted on the base 8; thereafter, the shielding plate 9 is mounted on the base 8; finally, the shielding cover 2 is installed in the outer cover 1, and the outer cover 1 is installed on the base 8, so that the assembly is completed;
further, the specific external dimensions of the fiber optic gyroscope inertial measurement device for the scout car mast are as follows: a square structure with the length of 220mm, the width of 220mm and the height of 160mm is connected with an external screw through 4 phi 6.5mm through holes on the base 8, and the bottom surface of the base 8 is used as a mounting reference surface;
preferably, referring to fig. 1 to 3, the external socket 10 of the device is arranged on the bottom surface of the base 8, when the device is installed on the installation surface of the top of the mast of the scout car, the butt joint of the external socket 10 of the device and the plug arranged on the installation surface of the top of the mast of the scout car is directly completed during installation, so that the space is saved, and the convenience of wiring is improved.
A fiber optic gyroscope inertial measurement unit for scout vehicle masts, from the aspect of power distribution design:
referring to fig. 11, the core of the power distribution design is a power module 7, wherein the power module 7 comprises a filtering module 701, a +24v signal acquisition and processing circuit board +5v module 702, a +24v accelerometer +15v module 703 and a +24v fiber optic gyro +5v module 704;
referring to fig. 11, the power distribution flow is: the external +24V input is converted into +24V with stable voltage through power supply filtering by a filtering module 701 which is input into a power supply module 7 by an external socket 10, and the +24V after filtering respectively enters a +24V signal acquisition processing circuit board +5V module 702, a +24V accelerometer +15V module 703 and a +24V fiber optic gyro +5V module 704 which are independent, and correspondingly respectively become a signal acquisition processing circuit board +5V, an accelerometer +15V and a fiber optic gyro +5V by the modules;
preferably, the signal acquisition and processing circuit board +5v alone powers the digital circuit portion of the signal acquisition and processing circuit board 310;
preferably, the accelerometer ±15v supplies power to three accelerometer IF modules (IF is an abbreviation of "current frequency conversion") of the signal acquisition processing circuit board 310, and simultaneously supplies power to three accelerometers, and the reason why the three accelerometer IF modules and the three accelerometers of the signal acquisition processing circuit board 310 share the accelerometer ±15v is that: the signal acquisition of the accelerometer and the signal acquisition of the accelerometer IF module are related to power supply, so that the accelerometer + -15V shared by the three accelerometer IF modules and the three accelerometers can reduce the signal acquisition errors of the accelerometers caused by different power supplies;
preferably, the fiber-optic gyroscope +/-5V supplies power for three fiber-optic gyroscopes;
preferably, each module for supplying power to the signal acquisition and processing circuit board 310, the three accelerometers and the three fiber optic gyroscopes is independent of each other, so that mutual interference caused by common power utilization among all the components is avoided, and the precision of the fiber optic gyroscope inertial measurement device is improved.
A fiber optic gyroscope inertial measurement unit for scout car mast, from the aspect of signal flow design:
referring to fig. 12, the core of the signal flow is a signal acquisition processing circuit board 310, where the signal acquisition processing circuit board 310 includes a program storage module 3101, a digital signal processing module 3102, a synchronization signal module 3103, a user data format configuration module 3104, a digital signal acquisition module 3105, an X-direction accelerometer IF module 3106, a Y-direction accelerometer IF module 3107, a Z-direction accelerometer IF module 3108, and an RS422 interface module 3109;
preferably, at the power-on start-up time before the fiber-optic gyroscope inertia measurement device is ready to work normally, the digital signal processing module 3102 reads the running program stored in the program storage module 3101 to start working;
preferably, the three accelerometers output analog signals in the form of currents, and the currents of the X-direction accelerometer 305, the Y-direction accelerometer 306 and the Z-direction accelerometer 307 are respectively converted into an X-direction accelerometer frequency signal, a Y-direction accelerometer frequency signal and a Z-direction accelerometer frequency signal by the X-direction accelerometer IF module 3106, the Y-direction accelerometer IF module 3107 and the Z-direction accelerometer IF module 3108, and the three accelerometer digital signals in the form of frequencies are acquired by the digital signal acquisition module 3105 in real time;
preferably, after receiving the synchronization signal sent by the synchronization signal module 3103, the three fiber-optic gyroscopes output RS422 signals through respective RS422 signal ports, that is, the X-direction fiber-optic gyroscope 302, the Y-direction fiber-optic gyroscope 303 and the Z-direction fiber-optic gyroscope 304 output X-direction fiber-optic gyroscope RS422 signals, Y-direction fiber-optic gyroscope RS422 signals and Z-direction fiber-optic gyroscope RS422 signals after receiving the synchronization signal, and the RS422 signals of the three fiber-optic gyroscopes are received by the RS422 interface module 3109 and sent to the digital signal acquisition module 3105 for real-time acquisition;
preferably, the digital signal collecting module 3105 packages the collected digital signals of the three accelerometers and the three fiber optic gyroscopes into collected digital signals and sends the collected digital signals to the digital signal processing module 3102, the digital signal processing module 3102 processes the collected digital signals in real time according to the running program and converts the collected digital signals into processed digital signals and sends the processed digital signals back to the digital signal collecting module 3105, and the digital signal collecting module 3105 packages the processed digital signals into data and outputs the data to the user data format configuration module 3104;
preferably, the user data format configuration module 3104 outputs data formats according to the requirements of the user, including RS232 data format, RS422 data format, internet access data format and CAN access data format, and the user data with configured data format is transmitted to the user through the external socket 10;
preferably, the digital signal collecting module 3105 and the digital signal processing module 3102 are two core modules of the signal collecting and processing circuit board 310, the digital signal collecting module 3105 is a Field Programmable Gate Array (FPGA) chip with model XC3S1000-4FGG320I, and the digital signal processing module 3102 is a low-power floating point Digital Signal Processor (DSP) chip with model TMS320C6713BGDPA 200;
preferably, the signal flows of the three accelerometers and the three fiber optic gyroscopes are independent of each other, so that interference among all the components due to signal transmission is reduced;
preferably, the three fiber-optic gyroscopes send out the RS422 signal after receiving the synchronous signal, so that errors caused by signal transmission delay among the three fiber-optic gyroscopes are reduced;
preferably, the digital signal acquisition module 3105 and the digital signal processing module 3102 of the signal acquisition processing circuit board 310 adopt an fpga+dsp frame with excellent real-time performance, so as to realize real-time acquisition and processing of the accelerometer and the fiber optic gyro signals, and reduce the measurement error of the fiber optic gyro inertial measurement device caused by the delay error of data acquisition and processing, thereby improving the precision.
Claims (6)
1. The optical fiber gyro inertia measurement device for the scout vehicle mast comprises an outer cover, an inertia measurement unit and a base, and is characterized by further comprising a shielding plate, a shielding cover, a damping pad and a damping pad mounting plate; the vibration-damping pad mounting plate is of a square ring structure, four step holes are formed in the inner sides of four corners of the back surface of the square ring structure, four square bosses extend outwards from four corners of the square ring structure of the vibration-damping pad mounting plate, and through holes for mounting vibration-damping pads are formed in the bosses;
the vibration reduction pad is made of silicon rubber, is of a round bench structure, extends out of a cylindrical boss on a cylindrical seat, and is provided with a circular through hole penetrating through the center of the vibration reduction pad;
the shielding plate is positioned on the lower surface of the base; the middle position of the base is provided with a mounting groove for accommodating the power supply module; the vibration reduction pad mounting plate is positioned on the upper surface of the base and surrounds the periphery of the power supply module; the body of the inertia measurement unit is fixed on the top of the vibration reduction pad mounting plate through a step hole reversely screwing screw; the shielding cover is fixed at the edge of the base and covers the outer side of the inertial measurement unit; the outer cover covers the outer side of the shielding cover and is fixed on the base;
each through hole is provided with two vibration reduction pads, the two vibration reduction pads are opposite to each other, and an air layer is arranged between the cylindrical bosses of the two vibration reduction pads; the vibration damping pad mounting plate is fixed to the upper surface of the bottom plate by vibration damping pad fastening screws penetrating through the two vibration damping pad circular through holes.
2. The fiber optic gyroscope inertial measurement unit of claim 1, wherein the inertial measurement unit comprises a body, an X-direction fiber optic gyroscope, a Y-direction fiber optic gyroscope, a Z-direction fiber optic gyroscope, an X-direction accelerometer, a Y-direction accelerometer, a Z-direction accelerometer, a first signal acquisition processing circuit board mounting transition piece, a second signal acquisition processing circuit board mounting transition piece, and a signal acquisition processing circuit board;
the X-direction fiber optic gyroscope, the Y-direction fiber optic gyroscope and the Z-direction fiber optic gyroscope are respectively arranged on an orthogonal X-direction fiber optic gyroscope installation surface, a Y-direction fiber optic gyroscope installation surface and a Z-direction fiber optic gyroscope installation surface on the body; the X-direction accelerometer, the Y-direction accelerometer and the Z-direction accelerometer are respectively arranged on an X-direction accelerometer installation surface, a Y-direction accelerometer installation surface and a Z-direction accelerometer installation surface on an accelerometer installation boss on the body.
3. The inertial measurement unit of a fiber optic gyroscope for a scout mast of claim 1, wherein the outer diameter of the cylindrical seat of the vibration damping pad is greater than the inner diameter of the through holes in the bosses at the four corners of the vibration damping pad mounting plate, the outer diameter of the cylindrical boss of the vibration damping pad is less than the inner diameter of the through holes in the bosses at the four corners of the vibration damping pad mounting plate, and the height of the cylindrical boss of the vibration damping pad is less than 1/2 of the height of the through holes in the bosses at the four corners of the vibration damping pad mounting plate.
4. The fiber optic gyroscope inertial measurement device for a scout mast of claim 1, further comprising a vibration dampening pad fastener; the damping pad fastener mainly comprises a damping pad fastening screw, a damping pad fastening elastic pad and a damping pad fastening flat pad; the damping pad fastening spring pad and the damping pad fastening flat pad are positioned between the damping pad fastening screw head and the damping pad, wherein the damping pad fastening spring pad is tightly adjacent to the damping pad fastening screw head.
5. The inertial measurement unit of a fiber optic gyroscope for a scout mast of a vehicle of claim 1, wherein the base is provided with an external socket mounting slot for mounting an external socket; the appearance of shielding plate suits with the shielding plate mounting groove that the base bottom surface set up to be provided with the opening that makes the external socket pass through in the direction of corresponding external socket.
6. The fiber optic gyroscope inertial measurement unit for a scout mast of claim 2, wherein the inertial measurement unit further comprises a signal acquisition processing circuit board; the first signal acquisition and processing circuit board installation transition piece and the second signal acquisition and processing circuit board installation transition piece are installed on the right side of the body through screws, round bosses are arranged on the first signal acquisition and processing circuit board installation transition piece and the second signal acquisition and processing circuit board installation transition piece, screw holes are formed in the round bosses, and the signal acquisition and processing circuit board is installed on the round bosses of the first signal acquisition and processing circuit board installation transition piece and the second signal acquisition and processing circuit board through screws; the optical fiber gyroscope and the accelerometer are both connected to the signal acquisition and processing circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321177796.9U CN219914456U (en) | 2023-05-16 | 2023-05-16 | Optical fiber gyroscope inertial measurement device for scout car mast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321177796.9U CN219914456U (en) | 2023-05-16 | 2023-05-16 | Optical fiber gyroscope inertial measurement device for scout car mast |
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| Publication Number | Publication Date |
|---|---|
| CN219914456U true CN219914456U (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321177796.9U Active CN219914456U (en) | 2023-05-16 | 2023-05-16 | Optical fiber gyroscope inertial measurement device for scout car mast |
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| Country | Link |
|---|---|
| CN (1) | CN219914456U (en) |
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2023
- 2023-05-16 CN CN202321177796.9U patent/CN219914456U/en active Active
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