CN219301641U

CN219301641U - Test box for optical fiber ring environment screening

Info

Publication number: CN219301641U
Application number: CN202320645059.0U
Authority: CN
Inventors: 王猛; 廖先德; 赖厚安
Original assignee: Shenzhen Aerospace Intelligent Control Technology Co ltd
Current assignee: Shenzhen Aerospace Intelligent Control Technology Co ltd
Priority date: 2023-03-16
Filing date: 2023-03-16
Publication date: 2023-07-04
Anticipated expiration: 2033-03-16

Abstract

The utility model discloses a test box for screening an optical fiber ring environment, which relates to the technical field of optical fiber ring tests, and comprises a heat conduction box body, a box cover and a tail fiber tube, wherein an optical fiber ring placing position for accommodating an optical fiber ring is arranged on the inner surface of the bottom wall of the heat conduction box body, a fiber outlet penetrating into the inner space of the heat conduction box body is formed on the outer surface of the side wall of the heat conduction box body, the box cover is covered on the upper end opening of the heat conduction box body, the tail fiber tube is arranged on the outer side wall of the heat conduction box body, a tail fiber channel is formed in the length direction of the tail fiber tube, and the tail fiber channel is communicated with the fiber outlet. According to the utility model, an operator only needs to place the optical fiber ring on the test box, and then the test box is directly placed on the object placing plate of the incubator, so that the influence of convection air in the incubator on the optical fiber ring and the tail fiber can be prevented by the test box.

Description

Test box for optical fiber ring environment screening

Technical Field

The utility model relates to the technical field of optical fiber ring testing, in particular to a test box for optical fiber ring environment screening.

Background

The optical fiber gyroscope is an angular motion detection device which detects the plane angular velocity of a loop by utilizing the Sagnac effect and further calculates the motion gesture of an object, is an instrument capable of accurately determining the direction of the moving object, and is an inertial navigation instrument widely used in modern aviation, navigation, aerospace and national defense industries.

The optical fiber ring is a core sensitive device of the optical fiber gyroscope, and after the optical fiber ring is produced, zero bias tests, such as conventional zero bias tests, magnetic field zero bias tests, full-temperature zero bias tests and the like, are often required to be carried out under different environments so as to ensure that the optical fiber ring assembled into the optical fiber gyroscope can reach specified technical indexes. When the full-temperature zero-bias test is carried out on the optical fiber ring, the existing test method utilizes the principle and structure of the optical fiber gyroscope, takes other parts of the optical fiber gyroscope except the optical fiber ring as test equipment, and then connects with a test computer to form a whole set of test system. Two test ideas are provided, one is that test equipment is placed outside an incubator, only an optical fiber ring is placed in the incubator, and tail fibers of the two are connected in a fusion mode; and the other is that after the test equipment and the optical fiber ring are welded, the whole is put into an incubator, and the whole is connected with a test computer only through a communication line. For the screening test of the optical fiber ring, the extra noise interference of the test equipment caused by environmental factors should be reduced as much as possible, so that the idea of separating the test equipment from the optical fiber ring by adopting the former is more reasonable. However, when the incubator is opened, strong convection wind is generated in the incubator, the optical fiber ring, particularly the tail fiber part, can swing greatly under the action of wind, and the swing can change the refractive index of the section of optical fiber, so that parameters such as optical power, polarization state and the like are fluctuated, and the zero-bias test result is influenced.

In the prior art, the high-low temperature resistant adhesive tape is used for fixing the optical fiber ring and the tail fiber, but the fixed tail fiber is too loose or too tight to generate additional stress, the refractive index of the optical fiber at the bonding position is changed, the test result is influenced, and the requirements on the skill and the proficiency of operators are high. In addition, the adhesive tape needs to be removed after the test, the operation is complex, the risk is high, and the targeted improvement is necessary.

Disclosure of Invention

The utility model mainly aims to provide a test box for optical fiber ring environment screening, which aims to reduce the influence of convection air in an incubator on an optical fiber ring and a tail fiber, so that a test result can truly reflect the zero-bias performance of the optical fiber ring.

In order to achieve the above purpose, the test box for screening the environment of the optical fiber ring provided by the utility model comprises a heat conduction box body, a box cover and a tail fiber tube, wherein the inner surface of the bottom wall of the heat conduction box body is provided with an optical fiber ring placement position for accommodating the optical fiber ring, the outer surface of the side wall of the heat conduction box body is provided with a fiber outlet penetrating through the inner space of the heat conduction box body, the box cover covers the upper end opening of the heat conduction box body, the tail fiber tube is arranged on the outer side wall of the heat conduction box body, and a tail fiber channel is formed in the length direction of the tail fiber tube and is communicated with the fiber outlet.

Optionally, the fiber pigtail tube includes a bottom wall, a first side plate and a second side plate, where the first side plate and the second side plate are opposite, the bottom wall is disposed at bottoms of the first side plate and the second side plate and connects the first side plate and the second side plate, and the bottom wall and the first side plate and the second side plate enclose to form a fiber pigtail slot; a wind shield is inserted in the middle of the tail fiber groove to divide the tail fiber groove into a tail fiber channel at the lower part and an open channel at the upper part; the box cover is provided with a wind shielding block in a protruding mode towards one side of the open channel, the height of the wind shielding block is identical with that of the open channel, and the wind shielding block is inserted into the open channel and abuts against the wind shielding plate so as to seal the open channel.

Optionally, the inner wall surface of first curb plate with the equal concave draw-in groove that is equipped with of second curb plate, the draw-in groove sets up relatively, the deep bead inserts the draw-in groove in order with tail fiber groove sliding connection.

Optionally, the protruding stopper that is equipped with in bottom of the piece that keeps out the wind, the stopper is located keep out the wind the piece towards the one end of heat conduction box inner space, the stopper is used for supporting the deep bead in order to block the slip of deep bead.

Optionally, the pigtail tube further comprises a fixing lug, the fixing lug is bent and arranged at one end of the first side plate and one end of the second side plate, which faces the heat conduction box body, and the fixing lug is fixedly connected with the heat conduction box body through a fastener.

Optionally, the heat conduction box body is located the side week of fine mouth is formed with the boss, the fixed ear paste locate the boss and with boss fixed connection.

Optionally, the box cover comprises a top plate and a coaming, the side plate is covered on the outer side wall of the heat conduction box body, an extension part is formed on one side of the top plate facing the boss, and the wind shielding block is convexly arranged on the bottom wall of the extension part; the left and right sides of extension is formed with dodges the piece, dodge the piece with the bounding wall sets up of bending, dodge the piece with be formed with between the piece keeps out the wind and dodge the groove, the fixed ear stretch into dodge the groove with boss fixed connection.

Optionally, a mounting hole is formed in the boss, the fixing lug is provided with a connecting hole matched with the mounting hole, and the fastener penetrates through the connecting hole and is screwed into the mounting hole, so that the fixing lug is fixedly connected with the boss.

Optionally, a silica gel pad for carrying the optical fiber ring is arranged in the optical fiber ring placing position.

Optionally, a side wall of the heat conducting box body is provided with a temperature sensor hole.

The utility model relates to a test box for screening an optical fiber ring environment, which comprises a heat conduction box body, a box cover and a fiber tail tube, wherein the inner surface of the bottom wall of the heat conduction box body is provided with an optical fiber ring placement position for accommodating an optical fiber ring, the outer surface of the side wall of the heat conduction box body is provided with a fiber outlet penetrating through the inner space of the heat conduction box body, the box cover is covered on the upper end opening of the heat conduction box body, the fiber tail tube is arranged on the outer side wall of the heat conduction box body, the length direction of the fiber tail tube is provided with a fiber tail channel, and the fiber tail channel is communicated with the fiber outlet. The heat conduction box body is made of a metal alloy material with excellent heat conduction performance, and the temperature change of the optical fiber ring in the test box is ensured to be similar to the environmental temperature change in the temperature box outside the test box so as to meet the test requirement. When the full-temperature zero offset test is performed, the optical fiber ring is placed at the optical fiber ring placement position, the box cover is covered, the heat conduction box body and the box cover form a containment for the optical fiber ring, and convection air in the incubator is prevented from blowing to the optical fiber ring; the tail fiber of the optical fiber ring is led out of the tail fiber channel to the outside of the incubator, and then the tail fiber emerging from the tail fiber channel is welded with the testing equipment to carry out subsequent testing operation, so that the tail fiber tube protects the tail fiber, and convection wind in the incubator is prevented from blowing to the tail fiber. According to the utility model, an operator only needs to place the optical fiber ring on the test box, and then the test box is directly placed on the object placing plate of the incubator, so that the influence of convection wind in the incubator on the optical fiber ring and the tail fiber can be blocked by the test box, the risk operation of damaging the tail fiber is avoided in the whole process, the influence of extra stress caused by a viscose mode is avoided, the occurrence rate of quality accidents can be effectively reduced, and the test result can truly reflect the zero-bias performance of the optical fiber ring.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a burst diagram of one embodiment of a cartridge for environmental screening of fiber optic rings according to the present utility model;

FIG. 2 is an assembly schematic diagram of an embodiment of a test cartridge for environmental screening of fiber optic rings according to the present utility model;

FIG. 3 is a schematic diagram illustrating the assembly of a pigtail tube and a wind deflector of an embodiment of a test cartridge for environmental screening of fiber optic rings according to the present utility model;

FIG. 4 is a schematic diagram of a cartridge cover of an embodiment of a cartridge for environmental screening of fiber optic loops according to the present utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Test box	23	Wind shielding block
10	Heat conduction box body	231	Limiting block
				11	Optical fiber ring placement position	30	Tail fiber tube
12	Fiber outlet	31	Bottom plate
				13	Boss	32	First side plate
131	Mounting hole	33	Second side plate
				14	Temperature sensor hole	34	Tail fiber channel
20	Box cover	35	Open channel
				21	Top plate	36	Clamping groove
211	Extension part	37	Fixed ear
				22	Coaming plate	371	Connecting hole
221	Avoidance block	40	Wind deflector

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The optical fiber ring is a core sensitive device of the optical fiber gyroscope, and after the optical fiber ring is produced, zero bias tests, such as conventional zero bias tests, magnetic field zero bias tests, full-temperature zero bias tests and the like, are often required to be carried out under different environments so as to ensure that the optical fiber ring assembled into the optical fiber gyroscope can reach specified technical indexes. When the full-temperature zero-bias test is carried out on the fiber ring, two test thinking exist, one is that test equipment is placed outside an incubator, only the fiber ring is placed in the incubator, and the two tail fibers are connected in a fusion mode; and the other is that after the test equipment and the optical fiber ring are welded, the whole is put into an incubator, and the whole is connected with a test computer only through a communication line. However, when the incubator is opened, strong convection wind is generated in the incubator, the optical fiber ring, particularly the tail fiber part, can swing greatly under the action of wind, and the swing can change the refractive index of the section of optical fiber, so that parameters such as optical power, polarization state and the like are fluctuated, and the zero-bias test result is influenced. In the prior art, the high-low temperature resistant adhesive tape is used for fixing the optical fiber ring and the tail fiber, but the too loose or too tight fixing of the tail fiber can generate additional stress, so that the refractive index of the optical fiber at the bonding position is changed, and the test result is influenced.

In order to solve the above-mentioned problems, the present utility model provides a test box 100 for optical fiber ring environment screening, referring to fig. 1 to 2, the test box 100 for optical fiber ring environment screening includes a heat conducting box 10, a box cover 20 and a fiber tail tube 30, an optical fiber ring placing position 11 for accommodating an optical fiber ring is provided on an inner surface of a bottom wall of the heat conducting box 10, a fiber outlet 12 penetrating into an inner space of the heat conducting box 10 is provided on an outer surface of a side wall of the heat conducting box 10, the box cover 20 covers an upper end opening of the heat conducting box 10, the fiber tail tube 30 is provided on an outer side wall of the heat conducting box 10, a fiber tail channel 34 is formed in a length direction of the fiber tail tube 30, and the fiber tail channel 34 is communicated with the fiber outlet 12.

The heat conducting box body 10 of the embodiment shown in the figure is a square heat conducting box body 10, the length is 400mm, the width is 300mm, the heat conducting box body 10 comprises a bottom wall and side walls, wherein the thickness range of the bottom wall is 4mm-5mm, and the thickness range of the side walls is 2mm-3mm. The inner surface of the bottom wall is provided with an optical fiber ring placement position 11 for accommodating an optical fiber ring, wherein the optical fiber ring placement position 11 can be a smooth plane, and the optical fiber ring is directly placed on the bottom wall of the heat conduction box body 10. If the optical fiber ring is not easy to move in order to limit the optical fiber ring, the optical fiber ring placing position 11 may be arranged in a manner that an optical fiber ring groove is concavely arranged on the inner surface of the bottom wall, or a convex ring is convexly arranged on the inner surface of the bottom wall, or a plurality of limit posts are arranged on the inner surface of the bottom wall, and the optical fiber ring is clamped in the optical fiber ring placing position 11 to realize limit. The embodiment shown in the figure is concave on the inner surface of the bottom wall, and is provided with a circular fiber ring groove with the depth of 2mm, and the diameter of the fiber ring groove is 120-125 mm, so that a conventional type fiber ring can be placed. To prevent the fiber ring groove from scratching the fiber ring, the groove walls of the fiber ring placement sites 11 are all provided with chamfers. The number of the optical fiber ring placement bits 11 in each heat conduction box body 10 can be 1, 2, 3 or more than 3. Of course, the shape, size and thickness of the heat conducting box 10 can be adjusted according to actual needs, and are not limited herein. The box cover 20 is covered on the upper end opening of the heat conduction box body 10 to form a sealing cavity, and the height range of the sealing cavity is 30mm-35mm, so that the height requirement of the conventional type optical fiber ring is met. A fiber outlet 12 is formed in one side wall of the heat conduction box body 10, a tail fiber tube 30 is connected to the fiber outlet 12, four sides of the tail fiber tube 30 are enclosed, a tail fiber channel 34 is formed in the length direction of the tail fiber tube, and a port of the tail fiber channel 34 extends to the outside of the incubator.

The heat conducting box body 10 is made of metal alloy materials, such as aluminum alloy, iron alloy, magnesium alloy and the like, and the alloy materials have excellent heat conducting performance, so that the temperature change of the optical fiber ring in the test box 100 is ensured to be similar to the environmental temperature change in the temperature box outside the test box 100, and the test requirements are met. Of course, to further ensure the thermal conductivity of the test cartridge 100, the cap 20 and the pigtail barrel 30 may be made of metal alloy materials. When the full-temperature zero offset test is performed, the optical fiber ring is placed at the optical fiber ring placing position 11, the box cover 20 is covered, the heat conduction box body 10 and the box cover 20 form a surrounding for the optical fiber ring, and convection air in the incubator is prevented from blowing to the optical fiber ring; the tail fiber of the fiber ring is led out of the tail fiber channel 34 to the outside of the incubator, and then the tail fiber which is led out of the tail fiber channel 34 is welded with the testing equipment for subsequent testing operation, so that the tail fiber tube 30 protects the tail fiber and prevents convection wind in the incubator from blowing to the tail fiber. According to the utility model, an operator only needs to place the optical fiber ring on the test box 100, then the test box 100 is directly placed on the object placing plate of the incubator, so that the influence of convection wind in the incubator on the optical fiber ring and the tail fiber can be blocked by the test box 100, the risk operation of damaging the tail fiber is avoided in the whole process, the influence of extra stress caused by a viscose mode is avoided, the occurrence rate of quality accidents can be effectively reduced, and the test result can truly reflect the zero-bias performance of the optical fiber ring.

When the bottom wall of the heat conduction box body 10 is provided with a plurality of optical fiber ring placement positions 11, the distance between the center of each optical fiber ring placement position 11 and the optical fiber outlet 12 is equal, the distance from the tail fiber of the optical fiber ring to the optical fiber outlet 12 is equal after the optical fiber ring is placed, the plurality of optical fiber ring placement positions 11 are arranged at intervals, and the interval distance should ensure that each optical fiber ring has a sufficient tail fiber coiling space.

Referring to fig. 3 to 4, the pigtail barrel 30 includes a bottom plate 31, a first side plate 32 and a second side plate 33, wherein the first side plate 32 and the second side plate 33 are disposed opposite to each other, the bottom plate 31 is disposed at the bottoms of the first side plate 32 and the second side plate 33 and connects the first side plate 32 and the second side plate 33, and the bottom plate 31 and the first side plate 32 and the second side plate 33 enclose to form a pigtail slot; a wind shield 40 is inserted in the middle of the tail fiber groove to divide the tail fiber groove into a lower tail fiber channel 34 and an upper open channel 35; the side of the box cover 20 facing the open channel 35 is convexly provided with a wind shielding block 23, the height of the wind shielding block 23 is consistent with the height of the open channel 35, and the wind shielding block 23 is inserted into the open channel 35 and abuts against the wind shielding plate 40 so as to seal the open channel 35.

The bottom plate 31 of tail fiber tube 30 sets up with the diapire parallel and level of heat conduction box body 10, and the width of the bottom plate 31 of tail fiber tube 30 is unanimous or slightly less than the width of fiber outlet 12, and first curb plate 32 and second curb plate 33 set up in the left and right sides of bottom plate 31 relatively, and the three encloses to close and forms the tail fiber groove, and the height in tail fiber groove is unanimous with the height of fiber outlet 12. The tail fiber groove is provided with baffle wind, and the width of the wind shield 40 is consistent with the width of the tail fiber groove. The wind shield 40, the bottom plate 31, the first side plate 32 and the second side plate 33 are enclosed to form a tail fiber channel 34; the wind deflector 40 and the first side plate 32 and the second side plate 33 of the protruding wind deflector 40 enclose an open channel 35. To ensure the sealing performance of the test box 100, a wind shielding block 23 is protruded at one side of the box cover 20 facing the open channel 35, and the wind shielding block 23 is inserted into the open channel 35 and abuts against the wind shielding plate 40 to seal the open channel 35. For example, the length of the pigtail slot may range from 190mm to 200mm, the length of the wind deflector 40 may range from 185mm to 195mm, and the cross-sectional area of the pigtail channel 34 may be about 150mm2 after the wind deflector 40 is inserted into the pigtail slot.

As the most likely contact component with the pigtail, all sharp edge angles of the pigtail slot are chamfered to prevent scratching the fiber.

Further, the inner wall surfaces of the first side plate 32 and the second side plate 33 are concavely provided with a clamping groove 36, the two clamping grooves 36 are oppositely arranged, and the wind shield 40 is inserted into the clamping groove 36 to be slidably connected with the tail fiber groove.

The inner wall surfaces of the middle parts of the first side plate 32 and the second side plate 33 are respectively concavely provided with a clamping groove 36 extending along the length direction of the channel wall, and the clamping groove 36 of the first side plate 32 and the clamping groove 36 of the second side plate 33 are symmetrically arranged and respectively penetrate through the inner wall surfaces of the first side plate 32 and the second side plate 33. The clamping groove 36 may be a semicircular groove for inserting the wind guard 40, and the position of the clamping groove 36 is adapted to the thickness of the rear wind guard block 23 covering the box cover 20, so as to ensure that the wind guard 40 is matched with the wind guard block 23 to seal the open channel 35 after being assembled, and correspondingly, a matching surface is formed on one surface of the wind guard 40 contacted with the clamping groove 36, and the matching surface is a semicircular curved surface and matched with the semicircular groove.

The wind shield 40 is inserted into the clamping groove 36 to be in sliding connection with the tail fiber groove, in order to prevent the wind shield 40 from excessively sliding into the inner space of the heat conduction box body 10, a limiting block 231 is convexly arranged at the bottom of the wind shield block 23, the limiting block 231 is positioned at one end of the wind shield block 23 facing the inner space of the heat conduction box body 10, and the limiting block 231 is used for propping against the wind shield 40 to block the sliding of the wind shield 40.

The pigtail tube 30 comprises a pigtail groove and a fixing lug 37 matched with the heat conduction box body 10, the fixing lug 37 is bent and arranged at one end of the first side plate 32 and one end of the second side plate 33, which face the heat conduction box body 10, and the fixing lug 37 is fixedly connected with the heat conduction box body 10 through a fastener.

The heat conduction box body 10 is located the side week of fine mouth 12 and is formed with boss 13, and fixed ear 37 pastes locates boss 13 and is connected with boss 13 fixed.

Further, the box cover 20 comprises a top plate 21 and a surrounding plate 22, the surrounding plate 22 is covered on the outer side wall of the heat conduction box body 10, an extension part 211 is formed on one side of the top plate 21 facing the boss 13, and the wind shielding block 23 is convexly arranged on the bottom wall of the extension part 211; the left and right sides of extension 211 is formed with dodges the piece 221, dodges the piece 221 and bend the setting with bounding wall 22, dodges and is formed with dodges the groove between piece 221 and the piece 23 that keeps out the wind, and fixed ear 37 stretches into dodges the groove in order to be connected with boss 13 fixed. Meanwhile, the provision of the avoidance groove facilitates the penetration of a finger to open the box cover 20.

The boss 13 is provided with a mounting hole 131, the fixing lug 37 is provided with a connecting hole 371 matched with the mounting hole 131, and a fastener is arranged in the connecting hole 371 in a penetrating mode and screwed into the mounting hole 131 so as to realize fixed connection between the fixing lug 37 and the boss 13. The fastener includes screw, screw or rivet etc. for the screw for example, is provided with four mounting holes 131 altogether on the boss 13, and wherein, the left side of fiber outlet 12 is provided with two M3 screw holes, and the right side of fiber outlet 12 is provided with two M3 screw holes, and the fixed ear 37 is provided with the mounting hole 131 of adaptation with the corresponding position of screw hole, wears to locate the fixed hole screw in the screw hole in order to realize the fixed connection of tail fiber section of thick bamboo 30 and heat conduction box body 10 through the screw during the installation.

In order to prevent a large temperature gradient from being generated in the axial direction of the optical fiber ring due to the difference of the heat conduction of the metal of the heat conduction box body 10 and the air in the box, a silica gel pad for bearing the optical fiber ring is arranged in the optical fiber ring placement position 11.

The side wall of the heat conductive cartridge 10 is provided with a temperature sensor hole 14 for inserting a temperature sensor to measure the actual temperature at the time of testing in the test cartridge 100. For example, two temperature sensor holes 14 are symmetrically disposed on the left and right sides of the fiber outlet 12, and it should be noted that, in general, the temperature sensor holes 14 are plugged by cotton or adhesive tape, so as to prevent convection air in the incubator from blowing into the sealed cavity from the temperature sensor holes 14, and the temperature sensor holes 14 are opened only when temperature measurement is needed. It should be noted that, for test items with more temperature detection requirements, the third temperature sensor may be directly placed in the pigtail channel 34 to measure the respective temperatures of the three optical fiber rings while fully utilizing the temperature sensor holes 14 on the side wall of the heat conducting box body 10.

In summary, the test box 100 of the present utility model can satisfy the requirements of two different test scenarios during the high-low temperature zero bias test: one is that no other test items have been previously performed and the fiber optic ring has not been fused to the test equipment; the other is that other test items have been previously performed and the fiber optic ring has been fused to the test equipment. In either state, an operator only needs to place the test box 100 on the incubator storage plate, place the optical fiber ring and the tail fiber into the test box 100, cover the box cover 20, and insert the wind deflector 40, so that the subsequent test operation can be performed.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. A test cassette for environmental screening of fiber optic loops, comprising:

the optical fiber ring accommodating device comprises a heat conduction box body, wherein the inner surface of the bottom wall of the heat conduction box body is provided with an optical fiber ring accommodating position for accommodating an optical fiber ring, and the outer surface of the side wall of the heat conduction box body is provided with a fiber outlet penetrating to the inner space of the heat conduction box body;

the box cover is covered on the upper end opening of the heat conduction box body;

the tail fiber tube is arranged on the outer side wall of the heat conduction box body, a tail fiber channel is formed in the length direction of the tail fiber tube, and the tail fiber channel is communicated with the fiber outlet.

2. The test box for screening the environment of the optical fiber ring according to claim 1, wherein the fiber tail tube comprises a bottom plate, a first side plate and a second side plate, wherein the first side plate and the second side plate are oppositely arranged, the bottom plate is arranged at the bottoms of the first side plate and the second side plate and is connected with the first side plate and the second side plate, and the bottom plate and the first side plate and the second side plate are enclosed to form a fiber tail groove;

a wind shield is inserted in the middle of the tail fiber groove to divide the tail fiber groove into a tail fiber channel at the lower part and an open channel at the upper part;

the box cover is provided with a wind shielding block in a protruding mode towards one side of the open channel, the height of the wind shielding block is identical with that of the open channel, and the wind shielding block is inserted into the open channel and abuts against the wind shielding plate so as to seal the open channel.

3. The test box for screening the environment of the optical fiber ring according to claim 2, wherein the inner wall surfaces of the first side plate and the second side plate are concavely provided with clamping grooves, the clamping grooves are oppositely arranged, and the wind shield is inserted into the clamping grooves to be in sliding connection with the tail fiber grooves.

4. A test box for environmental screening of optical fiber loop according to claim 3, wherein a stopper is convexly arranged at the bottom of the wind shielding block, the stopper is positioned at one end of the wind shielding block facing the inner space of the heat conducting box body, and the stopper is used for propping against the wind shielding plate to block the sliding of the wind shielding plate.

5. The test box for screening the environment of the optical fiber ring according to claim 2, wherein the tail fiber tube further comprises a fixing lug, the fixing lug is bent and arranged at one end of the first side plate and one end of the second side plate, which faces the heat conduction box body, and the fixing lug is fixedly connected with the heat conduction box body through a fastener.

6. The test box for optical fiber loop environment screening according to claim 5, wherein a boss is formed on the side periphery of the heat conducting box body located at the fiber outlet, and the fixing lug is attached to the boss and fixedly connected with the boss.

7. The test box for screening the environment of the optical fiber ring according to claim 6, wherein the box cover comprises a top plate and a coaming, the coaming is covered on the outer side wall of the heat conduction box body, an extension part is formed on one side of the top plate, which faces the boss, and the wind shielding block is convexly arranged on the bottom wall of the extension part;

the left end and the right end of the extension part are provided with avoidance blocks, the avoidance blocks and the coaming are bent, an avoidance groove is formed between the avoidance blocks and the wind shielding blocks, and the fixing lugs extend into the avoidance groove to be fixedly connected with the boss.

8. The test box for screening the environment of the optical fiber ring according to claim 6, wherein the boss is provided with a mounting hole, the fixing lug is provided with a connecting hole matched with the mounting hole, and the fastener is arranged in the connecting hole in a penetrating manner and screwed into the mounting hole, so that the fixing lug is fixedly connected with the boss.

9. A test cartridge for environmental screening of fiber optic rings as in any of claims 1-8, wherein a silica gel pad for carrying said fiber optic rings is disposed within said fiber optic ring placement site.

10. The cartridge for environmental screening of optical fiber loop of any one of claims 1 to 8, wherein the side wall of the thermally conductive cartridge body is provided with a temperature sensor hole.