CN216285753U - Optical fiber rotating seismograph - Google Patents

Abstract

The utility model belongs to the technical field of seismographs, and discloses an optical fiber rotation seismograph, which comprises a base, a cover plate, a shell, an interface plate, a main body, three optical fiber gyro modules, a circuit and heat dissipation module, a function plate and a light source module, wherein the base, the shell, the cover plate and the interface plate surround to form a bin body; the optical fiber rotary seismograph provided by the utility model realizes the modularization of each function of the triaxial optical fiber gyro seismograph, and is integrally detachable and convenient to disassemble and assemble. The optical fiber rotary seismograph can stably work in a large-span constant-temperature environment, a large-range variable-temperature environment and a large amount of sand blown by wind and rainwater.

Description

Optical fiber rotating seismograph

Technical Field

The utility model belongs to the technical field of seismographs, and particularly relates to an optical fiber rotation seismograph.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

The seismic waves are elastic waves radiated from a seismic source in the earth to the periphery through the earth crust, the research on the seismic waves is helpful for knowing the real situation in the earth, the modern theory proves the existence of the rotation component in the seismic waves, and the method indicates that the method plays a vital role in completely constructing a seismic model, knowing the generation and propagation of the earthquake and even predicting the earthquake.

Conventional seismographs are only capable of measuring linear motion and thus have long been limited to the measurement of translational components in the past seismic wave research history, and rotational seismology has been slow. With the rapid development of the optical fiber gyroscope, the three-component optical fiber gyroscope comes into play, and as a novel rotational angular velocity measuring device, the three-component optical fiber gyroscope is applied to the fields of missile, aviation, aerospace, navigation, geological measurement, high-rise monitoring and the like, but at present, a mature optical fiber rotational seismograph product does not appear in China.

A fiber-optic gyroscope based on Sagnac effect (Sagnac effect) is a sensor for measuring the angular velocity of inertial motion of an object, and is characterized in that the fiber-optic gyroscope is sensitive to rotational motion only and can directly measure the rotational motion, and meanwhile, no moving part is arranged in the instrument, so that the stability of the device is high, the service life is long, and the fiber-optic gyroscope is very suitable for being used in the field of earthquake monitoring. The seismograph is used in the field, and needs to be in contact with the ground, and comprises a large amount of sand blown by wind and rainwater. The fiber-optic gyroscope belongs to a high-precision sensor, and in order to meet the high-precision requirement, the structural design of the fiber-optic gyroscope needs to be provided with components in an exquisite layout, and the functions of shock resistance, interference resistance, water resistance, easiness in maintenance, debugging and the like must be fully considered.

But use at present, the encapsulation is sealed in the high accuracy triaxial fiber gyroscope generally adopts two parts of bottom plate and casing, and various optic fibre rings, optical device, light source all are in the mounting groove of direct mount to bottom plate setting, and during the debugging maintenance, each part is dismantled more difficultly, and the modularized design is short of, and under the not good condition of light source heat dissipation, the performance that the optic fibre ring can directly be influenced to the temperature. In addition, the optical fiber ring is fixed mostly in a mode of gluing and auxiliary fixing of a mechanical pressing plate, additional stress is introduced to the optical fiber ring by extra adhesive, and the problems of change of the temperature performance of the optical fiber ring and the like are caused. In addition, in order to fuse the optical fibers of each optical device, a long tail fiber is often left, so that more bare optical fibers still exist after the optical fibers of each optical device are fused, and the optical fibers are easily damaged during disassembly, assembly, debugging and maintenance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems of difficult disassembly and assembly and poor space utilization degree, stability and reliability caused by complex structure of the optical fiber seismograph in the prior art, and the aim is realized by the following technical scheme:

the utility model provides an optical fiber rotating seismograph, which comprises:

a base;

a cover plate;

the two ends of the shell along the height direction are respectively connected with the base and the cover plate in a detachable mode;

the two ends of the interface board along the width direction are respectively connected with the two ends of the shell along the circumferential direction in a detachable mode, and the bottom end and the top end of the interface board are respectively connected with the base and the cover plate in a detachable mode;

the main body, the said base, the said outer casing, the said cover plate and the said interface board surround and form the storehouse, the said main body locates in the said storehouse, the said main body includes three perpendicular mounting surfaces each other;

the three optical fiber gyroscope modules are used for sensing rotary motion based on the Sagnac effect so as to monitor earthquake, the three optical fiber gyroscope modules are respectively and detachably mounted on the three mounting surfaces, and the axes of the three optical fiber gyroscope modules are mutually orthogonal;

the circuit and heat dissipation module comprises a circuit board and a heat dissipation sheet, the circuit board is electrically connected with the fiber optic gyroscope module, the heat dissipation sheet is used for dissipating heat of the circuit board, and the heat dissipation sheet is respectively connected with the circuit board and the shell;

the function board and the light source module comprise a function circuit board and a light source unit, wherein the function circuit board is used for providing a basic circuit and an external function for the optical fiber gyro module, the light source unit is used for providing a light source for the optical fiber gyro module, and the function circuit board and the light source unit are arranged on the interface board.

The optical fiber rotary seismograph provided by the utility model realizes the modularization of all functions of the triaxial optical fiber gyro seismograph, and comprises an optical fiber gyro module, a circuit and heat dissipation module, a function board and light source module, a main body and a shell module. The base, the cover plate and the shell form an outer shell of the seismograph, the detachable connection is adopted to facilitate disassembly and assembly, the main body forms a supporting framework of the fiber-optic gyroscope module, and the disassembly and assembly are facilitated in a detachable mode. The optical path module wraps the optical fiber box with the optical path components, and the optical fibers are orderly wound and placed through the openings in different directions, so that the space inside the instrument is optimized. The circuit and the heat dissipation module directly transfer heat generated by the circuit board to the metal shell on the side wall through a material with high heat conductivity coefficient, so that the influence of temperature change on the optical fiber ring is reduced. The function board and the light source module realize the reasonable application of the middle space of the instrument, the structure arrangement is more compact, the space utilization rate of the optical fiber rotating seismograph is improved, the position of the light source is far away from the optical fiber ring of the three shafts and is tightly attached to the outer wall, heat is directly transmitted to the metal shell of the side wall through the interface board, the heat is not easy to accumulate and heat, and the influence of the temperature change on the optical fiber ring is reduced. The stable work of the optical fiber rotating seismograph under the large-span constant-temperature environment and the large-range variable-temperature environment is realized. The main body and the shell module are provided with waterproof treatment at each joint, so that stable work in the environment of a large amount of sand blown by wind and rainwater is realized.

In addition, the optical fiber rotary seismograph can also have the following additional technical characteristics:

in some embodiments of the utility model, the top surface of the cover plate is provided with a first sinking platform and a second sinking platform, the optical fiber rotary seismograph further comprises a GPS device, a docking flange, a universal level gauge, a metal sheet and a protective cover, the metal sheet and the docking flange are installed in the sinking platforms, the GPS device is magnetically connected with the metal sheet, the cover plate is further provided with a waterproof groove, the waterproof groove is arranged along the periphery of the sinking platforms, the protective cover is covered on the first sinking platform, the edge of the protective cover is clamped in the waterproof groove, and the universal level gauge is installed in the second sinking platform.

In some embodiments of the utility model, the interface board includes an interface board body and a support frame, two ends of the interface board body in a width direction are detachably connected to two ends of the housing in a circumferential direction, a bottom end and a top end of the interface board body are detachably connected to the base and the cover plate, the support frame includes a first support plate, a second support plate and a third support plate, one end of the first support plate in a length direction is vertically connected to one end of the second support plate in the length direction, one end of the third support plate is vertically connected to one end of the first support plate in the width direction, the second support plate is connected to an inner side wall of the interface board body and is arranged in parallel, the light source unit is disposed on the second support plate, and the third support plate is used for mounting a flange.

In some embodiments of the utility model, the fiber optic gyroscope module comprises:

the optical fiber framework connected with the main body comprises an outer rim, an inner rim, a hub and a web plate, wherein one axial end of the outer rim is connected with one axial end of the inner rim through the hub, the web plate is connected to the inner wall surface of the hub, and an optical fiber groove is formed in the outer surface of the outer rim;

with optical path box that optical fiber skeleton connects, including optical path box body, optical path lid, optical components and optical components clamp plate, the bottom of optical path box body with optical fiber skeleton connects, optical path lid is located the top of optical path box body, optical components locates this internal and with the bottom of optical path box body is connected, optical components clamp plate lid is located optical components is last and with this body coupling of optical path box.

In some embodiments of the utility model, the optical fiber groove is arc-shaped, one end of the optical fiber groove is tangent to the edge of the outer rim, the other end of the optical fiber groove is tangent to the edge of the web, one axial end of the web is connected with the optical path box body, and the other axial end of the web is connected with the main body.

In some embodiments of the present invention, the bottom of the light path box body is provided with a plurality of mounting grooves, the optical component is mounted in the mounting grooves, the side wall of the light path box body is further provided with a plurality of first optical fiber holes, the first optical fiber holes are used for optical fibers to pass through, the side wall of the light path box body is further provided with a plurality of bosses, and the light path box cover is screwed or clamped with the bosses.

In some embodiments of the present invention, the optical path box cover is provided with a plurality of second optical fiber holes for inserting optical fibers and modulation line holes for inserting modulation lines, the second optical fiber holes are circular holes, the modulation line holes are formed at the edge of the optical path box cover, the modulation line holes are U-shaped holes, the optical path box cover is further provided with through holes for fixing copper pillars, and the circuit board and the heat sink are screwed with the optical path box cover through the through holes.

In some embodiments of the present invention, the optical device pressing plate has a symmetrical structure, and a plurality of semicircular grooves and a plurality of rectangular grooves are formed on a bottom surface of the optical device pressing plate.

In some embodiments of the utility model, the main body includes a bottom plate, two vertical plates, a corner plate and two side plates, the bottom plate is horizontally disposed and connected to the top surface of the base, the two vertical plates are vertically disposed, an included angle between the two vertical plates is a right angle, bottom ends of the two vertical plates are connected to the bottom plate, two ends of the corner plate in the horizontal direction are respectively connected to horizontal ends of the two vertical plates, horizontal ends of the two side plates are respectively connected to one ends of the two vertical plates far away from the corner plate, and an included angle between the side plates and the vertical plates is a right angle.

In some embodiments of the present invention, the mounting groove includes a plurality of grooves having a circular arc-shaped horizontal section and a plurality of grooves having an i-shaped horizontal section.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

FIG. 1 schematically illustrates a schematic structural view of a fiber optic rotational seismograph according to an embodiment of the present invention;

FIG. 2 schematically shows a fiber optic gyroscope module of a fiber optic rotational seismograph according to an embodiment of the present invention;

FIG. 3 schematically illustrates a first partial structural view of a fiber optic rotational seismograph according to an embodiment of the present invention;

FIG. 4 schematically illustrates a second partial structural view of a fiber optic rotary seismograph according to an embodiment of the present invention;

the reference symbols in the drawings denote the following:

1: base, 2: interface board, 3: shell, 4: a main body, 5: cover plate, 6: first sinking platform, 7: second sink, 8: aviation head interface, 9: hub, 10: optical fiber framework, 11: web, 12: fiber groove, 13: outer rim, 14: inner rim, 15: light path box body, 16: rectangular groove, 17: semicircular groove, 19: light path box body side wall, 20: first fiber hole, 21: boss, 22: a box cover and 23: second fiber hole, 24: u-shaped hole, 25: support frame, 26: copper pillar, 27: circuit board, 28: light source, 29: butt flange, 30: functional circuit board, 31: heat sink, 32: light path box, 33: optical component, 34: optical device pressing plate, 35: shroud, 36: and (7) fixing holes.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "inner", "side", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 4, the present invention provides an optical fiber rotational seismograph, comprising:

a base 1;

a cover plate 5;

the two ends of the shell 3 along the height direction are respectively connected with the base 1 and the cover plate 5 in a detachable mode;

the two ends of the interface board 2 in the width direction are respectively connected with the two ends of the shell 3 in the circumferential direction in a detachable mode, and the bottom end and the top end of the interface board 2 are respectively connected with the base 1 and the cover plate 5 in a detachable mode;

the main body 4, the base 1, the shell 3, the cover plate 5 and the interface board 2 surround to form a bin body, the main body 4 is arranged in the bin body, and the main body 4 comprises three mutually perpendicular installation surfaces;

the three optical fiber gyroscope modules are used for sensing rotary motion based on the Sagnac effect so as to monitor earthquake, the three optical fiber gyroscope modules are respectively detachably mounted on the three mounting surfaces, and the axes of the three optical fiber gyroscope modules are mutually orthogonal;

the circuit and heat dissipation module comprises a circuit board 27 and a heat dissipation fin 31, the circuit board 27 is electrically connected with the fiber optic gyroscope module, the heat dissipation fin 31 is used for dissipating heat of the circuit board 27, and the heat dissipation fin 31 is respectively connected with the circuit board 27 and the shell 3;

the function board and the light source module comprise a function circuit board 30 and a light source unit 28, wherein the function circuit board 30 is used for providing a basic circuit and an external function for the fiber-optic gyroscope module, the light source unit 28 is used for providing a light source for the fiber-optic gyroscope module, and the function circuit board 30 and the light source unit 28 are installed on the interface board 2.

It should be noted that the fiber optic gyroscope module based on the Sagnac effect is a sensor for measuring the angular velocity of the inertial motion of an object, and is characterized in that the fiber optic gyroscope module is only sensitive to the rotational motion and can directly measure the rotational motion, so that the fiber optic gyroscope module is very suitable for the field of earthquake monitoring. Specifically, when two beams of light with the same characteristics, which are emitted by the same light source, in a closed light path are transmitted in the clockwise direction and the anticlockwise direction respectively, if the light path rotates, the two beams of light can generate a phase difference related to the rotation angular velocity, the rotation angular velocity of the closed light path can be measured by detecting the phase difference of the two beams of light or the change of interference fringes, the indexes of 3 rotation motions in the rotation seismology can be measured accurately and stably in real time, and the method has important guiding significance in the development of strong ground motion seismology, seismic engineering and seismic instruments.

It is understood that the detachable connection between the main body 4, the base 1, the housing 3, the cover 5 and the interface board 2 can be a bolt connection or a snap connection. The bin body is preferably in a square shape, and the compact layout of the triaxial fiber-optic gyroscope is realized. The main body 4, the base 1, the shell 3, the cover plate 5 and the interface board 2 are made of metal or plastic according to actual structural strength and heat dissipation requirements. The circuit board 27 carries the main circuit functions of the fiber-optic gyroscope seismograph, such as receiving and analyzing optical signals of optical fibers and outputting detection signals, and the heat sink 31 is made of metal and connects the circuit board 27 with the housing 3 to transfer heat generated by the circuit board 27 to the housing 3 for heat dissipation. The functional circuit board 30 mainly carries auxiliary circuit functions of the seismometer, such as implementing an external device interface, a memory card jack, and the like, and the light source unit 28 is used for providing a light source, and a known optical fiber gyroscope can be selected to adapt to the light source.

The optical fiber rotary seismograph provided by the utility model realizes the modularization of all functions of the triaxial optical fiber gyro seismograph, and comprises an optical fiber gyro module, a circuit and heat dissipation module, a function board and light source module, a main body 4 and a shell 3 module. Base 1, apron 5 and shell 3 constitute the outside casing of seismograph, adopt detachable connection to make things convenient for the dismouting, and main part 4 constitutes the supporting framework of fiber optic gyroscope module, equally detachable make things convenient for the dismouting. The optical path module wraps the optical fiber box with the optical path components, and the optical fibers are orderly wound and placed through the openings in different directions, so that the space inside the instrument is optimized. The circuit and heat dissipation module directly transfers heat generated by the circuit board 27 to the metal shell 3 on the side wall through a material with high heat conductivity coefficient, so that the influence of temperature change on the optical fiber ring is reduced. The function board and the light source module realize the reasonable application of the middle space of the instrument, the structure arrangement is more compact, the space utilization rate of the optical fiber rotating seismograph is improved, the position of the light source is far away from the optical fiber ring of the three shafts and is tightly attached to the outer wall, heat is directly transmitted to the metal shell 3 of the side wall through the interface board 2, the heat is not easy to accumulate and heat, and the influence of the temperature change on the optical fiber ring is reduced. The stable work of the optical fiber rotating seismograph under the large-span constant-temperature environment and the large-range variable-temperature environment is realized. The main body 4 and the shell 3 are provided with modules, and all joints are provided with waterproof treatment, so that stable work in the environment of a large amount of sand blown by wind and rainwater is realized.

In some embodiments of the present invention, the top surface of the cover plate 5 is provided with a first sinking platform 6 and a second sinking platform 7, the optical fiber rotary seismograph further comprises a GPS device, a docking flange 29, a universal level gauge, a metal sheet and a protective cover 35, the metal sheet and the docking flange 29 are installed in the sinking platforms, the GPS device is magnetically connected with the metal sheet, the cover plate 5 is further provided with a waterproof groove, the waterproof groove is arranged along the periphery of the sinking platforms, the protective cover 35 is covered on the first sinking platform 6, the edge of the protective cover 35 is clamped in the waterproof groove, and the universal level gauge is installed in the second sinking platform 7.

In particular, a waterproof material, such as a waterproof glue, is arranged in the waterproof groove to realize waterproof sealing. One end of the docking flange 29 is used for mounting the antenna, and the other end is used for connecting the wiring harness of the antenna to the circuit board 27 or the GPS, so that the wiring harness is protected inside the cover plate 5. The shape of the sinking platform can be square or round, and is preferably square, so that the placing of the shield 35 is more stable.

In some embodiments of the present invention, the interface board 2 includes an interface board body and a support bracket 25, both ends of the interface board body in the width direction are detachably connected to both ends of the housing 3 in the circumferential direction, respectively, a bottom end and a top end of the interface board body are detachably connected to the base 1 and the cover plate 5, respectively, the support bracket 25 includes a first support plate, a second support plate, and a third support plate, one end of the first support plate in the length direction is perpendicularly connected to one end of the second support plate in the length direction, one end of the third support plate is perpendicularly connected to one end of the first support plate in the width direction, the second support plate is connected to and arranged in parallel with an inner sidewall of the interface board body, the light source unit 28 is provided on the second support plate, and the third support plate is used for mounting the flange. The interface board 2 is also provided with an aerial head interface 8.

It should be noted that the interface board body, the first support plate, the second support plate and the third support plate are preferably rectangular plates, which are convenient to process and assemble, and the second support plate can be connected with the interface board body through bolts or connected through clamping. The light source unit 28 can be fixed on the second support plate through bolts, and heat generated by the light source unit 28 during operation is transmitted to the outside through the interface plate 2, so that the heat accumulation in the box body is reduced, and the influence on the optical fibers is reduced. The flange on the third support plate can be used for wiring harness connection or fixation.

In some embodiments of the utility model, a fiber optic gyroscope module comprises:

the optical fiber framework 10 connected with the main body 4 comprises an outer rim 13, an inner rim 14, a hub 9 and a web 11, wherein one axial end of the outer rim 13 is connected with one axial end of the inner rim 14 through the hub 9, the web 11 is connected to the inner wall surface of the hub 9, and an optical fiber groove 12 is formed in the outer surface of the outer rim 13;

light path box 32 connected with optical fiber skeleton 10, including light path box body 15, light path lid 22, optical components 33 and optical components clamp plate 34, the bottom and the optical fiber skeleton 10 of light path box body 15 are connected, the top of light path box body 15 is located to light path lid 22 lid, optical components 33 locate in the light path box body 15 and be connected with the bottom of light path box body 15, optical components clamp plate 34 lid is located on optical components 33 and is connected with light path box body 15, the bottom of light path box body 15 is equipped with a plurality of fixed orificess 36, the accessible bolt passes fixed orifices 36 and is connected with optical fiber skeleton 10.

It can be understood that, the optical fiber framework 10 is a spin-on structure, the optical fiber is wound on the hub 9, the outer rim 13 and the inner rim 14 protruding from the hub 9 can protect the optical fiber, the thickness of the inner and outer rims 13 is preferably 2-7 mm, and the optical fiber is led out through the optical fiber groove 12 and connected with the optical path box 32. The optical box 32 may be a cube or a cylinder, and the optical component 33 is used for optical collection and analysis of the optical fiber. The optical device pressing plate 34 may be fixed to the bottom of the optical path box body 15 by bolts or snaps. The surface of the optical fiber device pressing plate connected with the optical component 33 can be further provided with a groove matched with the appearance of the optical component 33, so that the optical fiber device pressing plate is reinforced and fixed. The web plate 11 is provided with mounting holes corresponding to the light path boxes 32, the number of the mounting holes is preferably 3-6, and the size of the mounting holes is preferably M2-M3; the web 11 is provided with mounting holes corresponding to the main body 4, the number of the mounting holes is preferably 3-6, and the size is preferably 2.5-6 mm.

In some embodiments of the present invention, the optical fiber groove 12 is arc-shaped, the width of the optical fiber groove 12 is preferably 1-3 mm, the depth of the optical fiber groove 12 is preferably 1-3 mm, one end of the optical fiber groove 12 is tangent to the edge of the outer rim 13, the other end of the optical fiber groove 12 is tangent to the edge of the web 11, one axial end of the web 11 is connected to the optical path box body 15, and the other axial end of the web 11 is connected to the main body 4. The fiber lead-out is facilitated by the provision of the fiber groove 12 in connection with the optical path box 32.

In some embodiments of the present invention, the bottom of the optical path box body 15 is provided with a plurality of mounting grooves, the optical component 33 is mounted in the mounting grooves, the side wall of the optical path box body 15 is further provided with a plurality of first optical fiber holes 20, the first optical fiber holes 20 are used for optical fibers to pass through, the side wall of the optical path box body 15 is further provided with a plurality of bosses 21, and the optical path box cover 22 is screwed or clamped with the bosses 21. The upper end face of the boss 21 is flush with the upper end face of the light path box 32, and the distance from the height of the boss 21 to the inner bottom of the light path box 32 is preferably 4-10 mm.

In some embodiments of the present invention, the optical path box cover 22 is provided with a plurality of second optical fiber holes 23 for inserting optical fibers and modulation line holes for inserting modulation lines, the second optical fiber holes 23 are circular holes, the modulation line holes are formed at the edge of the optical path box cover 22, the modulation line holes are U-shaped holes 24, the optical path box cover 22 is further provided with through holes for fixing copper pillars 26, and the circuit board 27 and the heat sink 31 are screwed with the optical path box cover 22 through the through holes. The second optical fiber hole 23 is preferably a semicircular arc with the width of 1-3 mm and the angle of 5-30 degrees and is 10-20 mm; the modulation line hole is preferably a U-shaped hole 24 with the width of 1-3 mm and the length of 3-5 mm. Threading is facilitated by the second fiber hole 23 and the modulation line hole.

Specifically, the optical device pressing plate 34 has a symmetrical structure, and a plurality of semicircular grooves 17 and a plurality of rectangular grooves 16 are formed on the bottom surface of the optical device pressing plate 34 for reinforcing fixation. The radius of the semicircular groove 17 is preferably 2-5 mm, and the width of the rectangular groove 16 is preferably 5-10 mm.

In some embodiments of the present invention, the main body 4 includes a bottom plate, two vertical plates, a corner plate, and two side plates, the bottom plate is horizontally disposed and connected to the top surface of the base 1, the two vertical plates are vertically disposed, an included angle between the two vertical plates is a right angle, bottom ends of the two vertical plates are connected to the bottom plate, two ends of the corner plate in the horizontal direction are respectively connected to horizontal ends of the two vertical plates, horizontal ends of the two side plates are respectively connected to one ends of the two vertical plates far away from the corner plate, and an included angle between the side plates and the vertical plates is a right angle.

In some embodiments of the utility model, the mounting groove comprises a plurality of grooves with circular arc-shaped horizontal sections and a plurality of grooves with I-shaped horizontal sections, and the grooves are matched with the appearance of the optical component, so that the reliability after assembly is better.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A fiber optic rotational seismograph, comprising:

a base;

a cover plate;

the two ends of the shell along the height direction are respectively connected with the base and the cover plate in a detachable mode;

the two ends of the interface board along the width direction are respectively connected with the two ends of the shell along the circumferential direction in a detachable mode, and the bottom end and the top end of the interface board are respectively connected with the base and the cover plate in a detachable mode;

the main body, the said base, the said outer casing, the said cover plate and the said interface board surround and form the storehouse, the said main body locates in the said storehouse, the said main body includes three perpendicular mounting surfaces each other;

the three optical fiber gyroscope modules are used for sensing rotary motion based on the Sagnac effect so as to monitor earthquake, the three optical fiber gyroscope modules are respectively and detachably mounted on the three mounting surfaces, and the axes of the three optical fiber gyroscope modules are mutually orthogonal;

the circuit and heat dissipation module comprises a circuit board and a heat dissipation sheet, the circuit board is electrically connected with the fiber optic gyroscope module, the heat dissipation sheet is used for dissipating heat of the circuit board, and the heat dissipation sheet is respectively connected with the circuit board and the shell;

the function board and the light source module comprise a function circuit board and a light source unit, wherein the function circuit board is used for providing a basic circuit and an external function for the optical fiber gyro module, the light source unit is used for providing a light source for the optical fiber gyro module, and the function circuit board and the light source unit are arranged on the interface board.

2. The optical fiber rotary seismograph of claim 1, wherein a first sinking platform and a second sinking platform are arranged on the top surface of the cover plate, the optical fiber rotary seismograph further comprises a GPS device, a butt flange, a universal level gauge, a metal sheet and a protective cover, the metal sheet and the butt flange are installed in the sinking platforms, the GPS device is magnetically connected with the metal sheet, the cover plate is further provided with a waterproof groove, the waterproof groove is arranged along the periphery of the sinking platforms, the protective cover is covered on the first sinking platform, the edge of the protective cover is clamped in the waterproof groove, and the universal level gauge is installed in the second sinking platform.

3. The fiber optic rotary seismograph of claim 1, wherein the interface board comprises an interface board body and a support frame, the two ends of the interface board body along the width direction are respectively connected with the two ends of the shell along the circumferential direction in a detachable mode, the bottom end and the top end of the interface board body are respectively connected with the base and the cover plate in a detachable way, the support frame comprises a first support plate, a second support plate and a third support plate, one end of the first support plate along the length direction is vertically connected with one end of the second support plate along the length direction, one end of the third support plate is vertically connected with one end of the first support plate along the width direction, the second supporting plate is connected with the inner side wall of the interface board body and is arranged in parallel, the light source unit is arranged on the second supporting plate, and the third supporting plate is used for installing a flange.

4. The fiber optic rotational seismograph of claim 1, wherein the fiber optic gyroscope module comprises:

the optical fiber framework connected with the main body comprises an outer rim, an inner rim, a hub and a web plate, wherein one axial end of the outer rim is connected with one axial end of the inner rim through the hub, the web plate is connected to the inner wall surface of the hub, and an optical fiber groove is formed in the outer surface of the outer rim;

with optical path box that optical fiber skeleton connects, including optical path box body, optical path lid, optical components and optical components clamp plate, the bottom of optical path box body with optical fiber skeleton connects, optical path lid is located the top of optical path box body, optical components locates this internal and with the bottom of optical path box body is connected, optical components clamp plate lid is located optical components is last and with this body coupling of optical path box.

5. The fiber optic rotational seismograph of claim 4, wherein the fiber optic groove is arcuate, one end of the fiber optic groove is tangent to an edge of the outer rim, the other end of the fiber optic groove is tangent to an edge of the web, one axial end of the web is connected to the lightpath box body, and the other axial end of the web is connected to the main body.

6. The optical fiber rotary seismograph of claim 4, wherein a plurality of mounting grooves are formed in the bottom of the optical path box body, the optical component is mounted in the mounting grooves, a plurality of first optical fiber holes are further formed in the side wall of the optical path box body and used for optical fibers to pass through, a plurality of bosses are further arranged on the side wall of the optical path box body, and the optical path box cover is in threaded connection with the bosses or in clamped connection with the bosses.

7. The optical fiber rotary seismograph of claim 4, wherein the optical path box cover is provided with a plurality of second optical fiber holes for inserting optical fibers and modulation line holes for inserting modulation lines, the second optical fiber holes are circular arc holes, the modulation line holes are formed in the edge of the optical path box cover, the modulation line holes are U-shaped holes, the optical path box cover is further provided with through holes for fixing copper columns, and the circuit board and the cooling fins are in threaded connection with the optical path box cover through the through holes.

8. The fiber optic rotational seismograph of claim 4, wherein the optics press plate is a symmetrical structure with a plurality of semi-circular grooves and a plurality of rectangular grooves on a bottom surface of the optics press plate.

9. The optical fiber rotary seismograph according to claim 1, wherein the main body comprises a bottom plate, two vertical plates, a corner plate and two side plates, the bottom plate is horizontally arranged and connected with the top surface of the base, the two vertical plates are vertically arranged, the included angle between the two vertical plates is a right angle, the bottom ends of the two vertical plates are connected with the bottom plate, the two ends of the corner plate in the horizontal direction are respectively connected with the horizontal ends of the two vertical plates, the horizontal ends of the two side plates are respectively connected with one ends of the two vertical plates far away from the corner plate, and the included angle between the side plates and the vertical plates is a right angle.

10. The optical fiber rotary seismograph of claim 6, wherein the mounting grooves comprise a plurality of grooves having a circular arc-shaped horizontal section and a plurality of grooves having an i-shaped horizontal section.

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