CN116381871A - Coupling device of wave-shifting optical fiber and photoelectric conversion element and detection system - Google Patents

Abstract

The embodiment of the application provides a coupling device and a detection system of a wave-shifting optical fiber and a photoelectric conversion element, wherein the coupling device comprises a shell and an elastic clamping piece. The shell is provided with a plugging groove and an opening communicated with the plugging groove, the side wall of the shell, which is positioned at one side opposite to the opening, is provided with a plugging channel penetrating through the side wall of the shell, the shell is connected with the photoelectric conversion element through the plugging groove, and the wave-shifting optical fiber penetrates through the plugging channel and is coupled with the photoelectric conversion element; at least part of the elastic clamping piece is arranged in the inserting channel, and the elastic clamping piece clamps the wave-moving optical fiber under the action of elasticity. The coupling device that this embodiment provided through setting up elasticity holder centre gripping and move the ripples optic fibre under the elastic force to make move ripples optic fibre surface can firmly with photoelectric conversion element surface laminating, and then effectively ensured the stable output of light in the ripples optic fibre that moves, and move ripples optic fibre and can plug repeatedly, be convenient for maintain, simultaneously, can not damage the surface of moving ripples optic fibre because of the clamping force of elasticity holder is too big again.

Description

Coupling device and detection system of wave-shifting optical fiber and photoelectric conversion element

technical field

The present application relates to the field of detection technology, in particular to a coupling device and a detection system of a wave-shifting optical fiber and a photoelectric conversion element.

Background technique

Cosmic ray muon imaging technology is a new type of non-destructive imaging technology developed in recent years, which uses the transmission and scattering phenomena that occur when cosmic ray muons pass through objects for imaging. The plastic scintillator is a kind of muon detector, but the light will attenuate after traveling a certain distance in the plastic scintillator. In order to increase the transmission efficiency of the fluorescence in the scintillator, a wave-shifting optical fiber will be added in the center of the scintillator. The light in the wave-shifting optical fiber is transmitted to the photoelectric conversion element and converted into an electrical signal, and the photoelectric conversion element used is a multi-anode photomultiplier tube.

In the related art, the coupling device used between the photoelectric conversion element and the wave-shifting optical fiber cannot effectively guarantee the stable output of light in the wave-shifting optical fiber.

Contents of the invention

In view of this, the embodiment of the present application expects to provide a coupling device for a wave-shifting fiber and a photoelectric conversion element, and the coupling device can effectively guarantee the stable output of light in the wave-shifting fiber.

In order to achieve the above purpose, an embodiment of the present application provides a coupling device for a wave-shifting optical fiber and a photoelectric conversion element, including:

A casing, the casing is provided with an insertion slot and an opening communicating with the insertion slot, and the side wall of the casing on the side opposite to the opening is provided with at least one hole penetrating through the side wall of the casing. an insertion channel, the housing is connected to the photoelectric conversion element through the insertion slot, so that the wave-shifting optical fiber can pass through the insertion channel and be coupled with the photoelectric conversion element;

An elastic clamping piece, at least part of the elastic clamping piece is arranged in the insertion channel, and when the wave-shifting optical fiber passes through the insertion channel, the elastic clamping piece clamps under the action of elastic force Hold the wave-shifting fiber.

In some embodiments, the housing includes a housing body and a protective cover connected to the housing body, the elastic clip is arranged between the housing body and the protective cover, and the housing body is provided with The insertion slot and the opening, the shell body is provided with at least one first sub-channel, the protective cover is provided with a second sub-channel corresponding to the first sub-channel, and the first sub-channel is connected to the first sub-channel. The second sub-channel constitutes at least part of the insertion channel.

In some embodiments, the surface of the housing is black.

In some embodiments, a receiving groove is formed on the side of the housing body close to the second sub-channel, the first sub-channel communicates with the second sub-channel through the receiving groove, and the elastic clamping member Set in the receiving groove.

In some embodiments, a receiving groove is formed on a side of the protective cover close to the first sub-channel, the first sub-channel communicates with the second sub-channel through the receiving groove, and the elastic clamping member Set in the receiving groove.

In some embodiments, a cable passing channel is provided inside the elastic clamping member, and the elastic clamping member shrinks axially from opposite ends to the middle to form a clamping portion, and when the wave-shifting optical fiber passes through In the state of being arranged in the wire-passing channel, the clamping part clamps the peripheral side of the wave-shifting optical fiber.

In some embodiments, the side wall of the elastic clip is broken to form an open slot, and the open slot extends in the axial direction.

In some embodiments, a deformation groove is formed on the side wall of the elastic clamping member, and the deformation groove extends along the axial direction.

In some embodiments, the coupling device includes a gasket, the gasket is arranged in the insertion groove and abuts against the groove wall of the insertion groove, and the gasket is provided with a seal corresponding to the insertion channel. socket hole.

In some embodiments, the diameter of the insertion hole is smaller than the diameter of the wave-shifting optical fiber.

In some embodiments, the thickness of the gasket is 1mm-3mm.

In some embodiments, the surface of the gasket is black.

An embodiment of the present application provides a detection system, including a wave-shifting optical fiber, a photoelectric conversion element, and the above-mentioned coupling device, the photoelectric conversion element is arranged in the insertion slot, and the wave-shifting optical fiber is passed through the The insertion channel is coupled with the photoelectric conversion element, and the elastic clamping member clamps the wave-shifting optical fiber under the action of elastic force.

The coupling device and detection system of wave-shifting optical fiber and photoelectric conversion element provided by the embodiment of the present application, wherein the coupling device includes a housing and an elastic clamping member, the housing is provided with an insertion slot and an opening communicating with the insertion slot, and the housing The side wall of the body on the opposite side of the opening is provided with at least one insertion channel through the side wall of the housing, and the housing is connected to the photoelectric conversion element through the insertion slot, so that the wave-shifting optical fiber can pass through the insertion channel, and Coupling with the photoelectric conversion element, that is to say, at least part of the photoelectric conversion element extends into the insertion groove and connects with the housing, so that the side wall of the photoelectric conversion element is in contact with the groove wall of the insertion groove, which can avoid external interference to a certain extent. The light enters from the gap between the photoelectric conversion element and the groove wall of the insertion groove, that is, the light entering the photoelectric conversion element can only enter through the wave-shifting optical fiber, thereby improving the detection accuracy of the detection system. Since there is no protective shell on the surface of the wave-shifting fiber, in order to avoid damage to the wave-shifting fiber, the coupling device of the embodiment of the present application is provided with an elastic clamping member, at least part of which is arranged in the insertion channel, and the wave-shifting fiber In the state of being inserted into the insertion channel, the elastic clamping part clamps the wave-shifting optical fiber under the action of elastic force, that is to say, by setting the elastic clamping part to clamp the wave-shifting optical fiber under the action of elastic force, so that the elastic clamping part Provide sufficient clamping force to fix the wave-shifting fiber, so that the surface of the wave-shifting fiber can be firmly attached to the surface of the photoelectric conversion element, thereby effectively ensuring the stable output of light in the wave-shifting fiber, and the wave-shifting fiber can be inserted repeatedly It is easy to be pulled out for maintenance, and at the same time, the surface of the wave-shifting optical fiber will not be damaged due to the excessive clamping force of the elastic clamping member.

Description of drawings

FIG. 1 is a schematic structural diagram of a coupling device in an embodiment of the present application;

Fig. 2 is the sectional view of A-A direction in Fig. 1;

Fig. 3 is the top view of Fig. 1;

FIG. 4 is a schematic structural diagram of an elastic clip in an embodiment of the present application.

Explanation of reference signs

10. Coupling device; 11. Housing; 11a, insertion groove; 11b, opening; 11c, insertion channel; 111, shell body; 111a, first sub-channel; 111b, accommodation groove; 112, protective cover; 112a, 12, elastic clamping member; 12a, wire passing channel; 12b, clamping part; 12c, opening groove; 12d, deformation groove; 13, sealing gasket; 13a, insertion hole.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the application and the technical features in the embodiments can be combined with each other. Undue Limitation of This Application.

The orientation terms in the description of the application are only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a reference to the application. limits.

An embodiment of the present application provides a detection system, including a wave-shifting optical fiber, a photoelectric conversion element, and the coupling device provided in the embodiment of the present application. The photoelectric conversion element is arranged in the insertion slot 11a of the coupling device 10, the wave-shifting optical fiber is passed through the insertion channel 11c of the coupling device 10, and is coupled with the photoelectric conversion element, and the elastic clamping member 12 clamps the wave-shifting optical fiber under the action of elastic force .

The detection system includes a plastic scintillator, but the light will attenuate after traveling a certain distance in the plastic scintillator. In order to increase the transmission efficiency of the fluorescence in the scintillator, a wave-shifting optical fiber will be added in the center of the scintillator.

One function of the wave-shifting fiber is to convert the wavelength of the fluorescence in the detector into light that can be received by the photoelectric conversion element, and the other function is to improve the efficiency of light collection and transmission. The light in the wave-shifting fiber is transmitted to the photoelectric conversion element and converted into an electrical signal. Compared with ordinary communication optical fibers, the wave-shifting optical fiber has a larger diameter, for example, 1.2mm, and the surface of the wave-shifting optical fiber has no protective casing.

Referring to FIG. 1 to FIG. 4 , the embodiment of the present application provides a coupling device 10 for a wave-shifting optical fiber and a photoelectric conversion element. The coupling device 10 includes a housing 11 and an elastic clamping member 12 .

The housing 11 is provided with an insertion slot 11a and an opening 11b communicating with the insertion slot 11a. The side wall of the housing 11 on the side opposite to the opening 11b is provided with at least one insertion channel 11c penetrating through the side wall of the housing 11. The photoelectric The conversion element can be inserted into the insertion slot 11a through the opening 11b, and the wave-shifting optical fiber can pass through the insertion channel 11c and be coupled with the photoelectric conversion element.

The specific type of the photoelectric conversion element is not limited here. Exemplarily, in one embodiment, the photoelectric conversion element is a multi-anode photomultiplier tube. The multi-anode photomultiplier tube is a multi-channel acquisition device. The surface is divided into 8×8 detection intervals. Each detection interval is square with a side length of 6mm and a total outer diameter of 48.5mm×48.5mm. It is packaged in glass.

Wherein, the number of insertion channels 11c is not limited here, and the number of insertion channels 11c may correspond to the number of wave-shifting optical fibers. Please refer to Fig. 3, the number of plug-in channels 11c in the embodiment of the present application is 64, that is to say, the coupling device 10 of the embodiment of the present application can fix 64 wave-shifting optical fibers at the same time, that is, it can simultaneously make 64 wave-shifting optical fibers and The photoelectric conversion element is coupled.

At least part of the elastic clamping part 12 is disposed in the insertion channel 11c, and when the wave-shifting optical fiber passes through the insertion channel 11c, the elastic clamping part 12 clamps the wave-shifting optical fiber under the action of elastic force. That is to say, when the wave-shifting optical fiber is passed through the insertion channel 11c, the elastic clamping member 12 is elastically deformed, and clamps the wave-shifting optical fiber under the action of elastic force, so that the elastic clamping member 12 provides sufficient clamping force Used to fix the wave-shifting fiber. In normal use, the wave-shifting optical fiber passes through the insertion channel 11c, and the clamping force of the elastic clamping member 12 can ensure that the optical fiber will not move up, down, left, and right.

In the related art, most optical fiber connectors and sockets are designed for communication optical fibers, and there are special equipment for suppressing the connectors of communication optical fibers, but the diameter of communication optical fibers is relatively small, and such connectors cannot be applied to wave-shifting optical fibers with larger diameters. . The sockets for optical fibers with a diameter of more than 1mm are designed for optical fibers with protective shells. There are no special sockets and plugs for wave-shifting optical fibers. They are closely arranged side by side in a square area of 48.5mm×48.5mm, and will damage the surface of the wave-shifting fiber to a certain extent. In addition, the surface of the multi-anode multiplier tube is very smooth, and the end of the wave-shifting optical fiber is round, and the surface is polished very smooth, so the combination of the two requires the design of a special coupling structure.

The coupling device between the wave-shifting optical fiber and the photoelectric conversion element provided by the embodiment of the present application includes a housing 11 and an elastic clamping member 12. The housing 11 is provided with an insertion slot 11a and an opening 11b communicating with the insertion slot 11a. The side wall of the body 11 on the side opposite to the opening 11b is provided with at least one insertion channel 11c passing through the side wall of the housing 11, and the housing 11 is connected to the photoelectric conversion element through the insertion groove 11a, so that the wave-shifting optical fiber can pass through In the insertion channel 11c, and coupled with the photoelectric conversion element, that is to say, at least part of the photoelectric conversion element extends into the insertion groove 11a and connects with the housing 11, so that the side wall of the photoelectric conversion element and the groove wall of the insertion groove 11a abutment, to a certain extent, can prevent external light from entering the gap between the photoelectric conversion element and the groove wall of the insertion groove 11a, that is, the light entering the photoelectric conversion element can only enter through the wave-shifting optical fiber, thereby improving the detection system. detection accuracy. Since there is no protective shell on the surface of the wave-shifting optical fiber, in order to avoid damage to the wave-shifting optical fiber, the coupling device 10 of the embodiment of the present application is provided with an elastic clamping member 12, at least part of which is disposed in the insertion channel 11c, In the state where the wave-shifting optical fiber is passed through the insertion channel 11c, the elastic clamping member 12 clamps the wave-shifting optical fiber under the action of elastic force, that is to say, the wave-shifting optical fiber is clamped under the action of elastic force by setting the elastic clamping member 12 , so that the elastic clamping member 12 provides sufficient clamping force for fixing the wave-shifting fiber, so that the surface of the wave-shifting fiber can be firmly attached to the surface of the photoelectric conversion element, thereby effectively ensuring the stable output of light in the wave-shifting fiber , and the wave-shifting optical fiber can be repeatedly inserted and removed, which is convenient for maintenance, and at the same time, the surface of the wave-shifting optical fiber will not be damaged due to the excessive clamping force of the elastic clamping member 12 .

The coupling device of the embodiment of the present application can effectively solve the problem of coupling between multiple wave-shifting fibers and the surface of the photomultiplier tube, and ensure that the wave-shifting fiber can be freely inserted and pulled out and that the surface of the wave-shifting fiber can be firmly attached to the surface of the photomultiplier tube. There will be no optical crosstalk between wave-shifting fibers. It provides a technical guarantee for the readout of light in the photoconductive detector in the muon measurement.

It should be noted that the aperture of the insertion channel 11c is slightly smaller than the diameter of the wave-shifting optical fiber, which facilitates the tight fit between the wave-shifting optical fiber and the housing 11. The aperture of the insertion channel 11c is, for example, ^1.2-0.1 mm.

In one embodiment, please refer to FIG. 1 to FIG. 3 , the housing 11 includes a housing body 111 and a protective cover 112 connected to the housing body 111, and the elastic clamping member 12 is disposed between the housing body 111 and the protective cover 112, that is, In other words, the casing 11 is provided with a casing body 111 and a protective cover 112 connected with the casing body 111 to realize the fixing of the elastic clip 12 .

The outer dimension of the insertion slot 11a is slightly larger than the outer diameter of the photoelectric conversion element, so as to ensure that the photoelectric conversion element is inserted into the insertion slot 11a without shaking.

The specific connection method between the shell body 111 and the protective cover 112 is not limited here. Exemplarily, the shell body 111 and the protective cover 112 can be magnetically connected, glued, clamped, screwed, fastened or inserted. and other connection methods.

Please refer to FIG. 2 , the housing body 111 is provided with an insertion slot 11a and an opening 11b, the housing body 111 is provided with at least one first sub-channel 111a, and the protective cover 112 is provided with a second sub-channel 112a corresponding to the first sub-channel 111a, The first sub-channel 111a and the second sub-channel 112a at least form part of the insertion channel 11c. That is to say, the side wall of the housing 11 on the opposite side of the opening 11b includes the side wall of the housing body 111 on the opposite side of the opening 11b and the side wall of the protective cover 112 on the opposite side of the opening 11b, that is, the insertion channel. 11c passes through the sidewall of the housing body 111 and the protective cover 112 on the side opposite to the opening 11b.

The first sub-channel 111a and the second sub-channel 112a constitute at least part of the plug-in channel 11c, which means that the first sub-channel 111a and the second sub-channel 112a may constitute the entire plug-in channel 11c, or may form part of the plug-in channel. 11c.

In one embodiment, please refer to FIG. 2 , a receiving groove 111b is formed on the side of the housing body 111 close to the second sub-channel 112a, the first sub-channel 111a communicates with the second sub-channel 112a through the receiving groove 111b, and the elastic clamping member 12 Set in the receiving groove 111b. That is to say, by providing the receiving groove 111b on the housing body 111, the elastic clamping member 12 is disposed in the receiving groove 111b, that is, the opposite ends of the elastic clamping member 12 are clamped between the housing body 111 and the protective cover 112, so as to The elastic clamping member 12 is fixed, and the first sub-channel 111a communicates with the second sub-channel 112a through the receiving groove 111b. When the wave-shifting optical fiber is passed through the insertion channel 11c, the elastic clamping member 12 can be moved Clamping of wave fibers.

In some other embodiments, the protective cover 112 is formed with a receiving groove 111b on the side close to the first sub-channel 111a, the first sub-channel 111a and the second sub-channel 112a communicate through the receiving groove 111b, and the elastic clamping member 12 is arranged in the receiving groove 111b. That is to say, by providing the receiving groove 111b on the protective cover 112, the elastic clamping member 12 is disposed in the receiving groove 111b, that is, the opposite ends of the elastic clamping member 12 are clamped between the shell body 111 and the protective cover 112, so that The elastic clamping member 12 is fixed, and the first sub-channel 111a communicates with the second sub-channel 112a through the receiving groove 111b. When the wave-shifting optical fiber is passed through the insertion channel 11c, the elastic clamping member 12 can be moved Clamping of wave fibers.

In some other embodiments, a first sub-groove is formed on the side of the housing body 111 close to the second sub-channel 112a, a second sub-groove is formed on the side of the protective cover 112 close to the first sub-channel 111a, and the first sub-channel 111a and The second sub-channel 112a communicates with the first sub-groove and the second sub-groove, part of the elastic clip 12 is arranged in the first sub-groove, and the other part of the elastic clip 12 is arranged in the second sub-groove, so as to realize the elastic clip 12 pairs of clamps for wave-shifting optical fibers.

In one embodiment, please refer to FIG. 4 , and refer to FIG. 2 in conjunction with FIG. 2 , the inside of the elastic clamping member 12 is provided with a passageway 12a, and the elastic clamping member 12 is gradually shrunk from the opposite ends to the middle in the axial direction to form a clip. The holding portion 12b is clamped on the peripheral side of the wave-shifting optical fiber in a state where the wave-shifting optical fiber is passed through the passageway 12a. That is to say, the size of the wire passing channel 12a gradually decreases from the opposite ends to the middle in the axial direction, similar to an hourglass-shaped fixing member that can undergo elastic deformation, so the size of the clamping portion 12b is the smallest , to realize the clamping of the wave-shifting optical fiber. When assembling the wave-shifting optical fiber, the wave-shifting optical fiber first passes through the second sub-channel 112a of the protective cover 112, and then passes through the passageway 12a of the elastic clamping member 12, and the clamping part 12b is clamped on the surface of the wave-shifting optical fiber To increase a certain holding force on the wave-shifting optical fiber, the wave-shifting optical fiber passes through the first sub-channel 111a of the housing body 111 under the action of an external force, and couples with the surface of the photoelectric conversion element. The overall angle and position can ensure the maximum transmission of light. The coupling device 10 can realize accurate positioning of the wave-shifting optical fiber, and can be disassembled freely, with good repeatability and good light tightness.

The aperture of the accommodation groove 111b can be determined according to the external dimensions of the elastic clamping member 12. In one embodiment, the aperture of the accommodation groove 111b is 1.2mm-1.8mm. Exemplarily, the aperture of the accommodation groove 111b can be 1.2mm, 1.3mm, for example. mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm or 1.8mm. The accommodating groove 111b within the aperture range can prevent the elastic clamping member 12 from falling out to a certain extent.

The selection of the inner diameter of the elastic clamping member 12 should satisfy: it can not only provide sufficient fastening force for the wave-shifting optical fiber passing through the channel 12a, but also not damage the surface of the wave-shifting optical fiber. Exemplarily, the inner diameter of the elastic clip 12 is 1.0 mm.

In one embodiment, please refer to FIG. 4 , the sidewall of the elastic clip 12 is broken to form an opening slot 12c, and the opening slot 12c extends along the axial direction. That is to say, the elastic clamping part 12 forms an opening groove 12c passing through the circumferential side wall of the elastic clamping part 12, so that the elastic clamping part 12 can have a certain deformation ability.

In an embodiment, please continue to refer to FIG. 4 , a deformation groove 12 d is formed on the side wall of the elastic clamping member 12 , and the deformation groove 12 d extends along the axial direction. The arrangement of the deformation groove 12d can improve the deformation ability of the elastic clamping member 12 to a certain extent, and the wave-shifting optical fiber will be deformed after being inserted into the passageway 12a of the elastic clamping member 12, thereby clamping the wave-shifting optical fiber.

In one embodiment, please refer to FIG. 2, the coupling device 10 includes a gasket 13, the gasket 13 is arranged in the insertion groove 11a and abuts against the groove wall of the insertion groove 11a, and the gasket 13 is provided with the insertion channel 11c The corresponding socket hole 13a. In this way, the surface of the photoelectric conversion element can be protected, and the light tightness of the surface of the photoelectric conversion element can be guaranteed to a certain extent, and the light between the wave-shifting optical fibers will not crosstalk.

In one embodiment, the diameter of the insertion hole 13a is smaller than the diameter of the wave-shifting optical fiber. In this way, the entry resistance of the wave-shifting optical fiber can be increased, and it can play a fixing role. In addition, the airtightness of the surface light of the photoelectric conversion element is further improved, and the light between the wave-shifting optical fibers will not crosstalk.

During normal use, the wave-shifting optical fiber passes through the second sub-channel 112a of the protective cover 112 and then is inserted into the cable passage 12a of the elastic clamping member 12. The clamping force of the elastic clamping member 12 can ensure that the wave-shifting optical fiber does not move up and down, left and right, The wave-shifting optical fiber is inserted into the first sub-channel 111a of the shell body 111, and contacts the surface of the photoelectric conversion element after passing through the sealing gasket 13, due to the connection between the wave-shifting optical fiber and the first sub-channel 111a, the second sub-channel 112a and the insertion hole 13a tight fit, and the limitation of the clamping force of the elastic clamping member 12, so as to realize the fixing of the wave-shifting optical fiber.

When maintenance is required, just gently pull out the wave-shifting fiber, and it can be plugged and pulled out repeatedly. The coupling device 10 ensures the airtightness of the light, that is, the photoelectric conversion element only receives the light entered by the wave-shifting optical fiber, there is no crosstalk between the wave-shifting optical fibers, and the position angle of the wave-shifting optical fiber will not twist to affect the absorption of light. The wave-shifting optical fiber can be freely plugged and unplugged without affecting the accuracy of the next assembly.

In one embodiment, the thickness of the gasket 13 is 1mm-3mm. Exemplarily, the thickness of the gasket 13 may be, for example, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.2mm, 2.5mm, 2.8mm or 3.0mm. The sealing gasket 13 within this thickness range can better protect the photoelectric conversion element and have better light-tightness.

The specific connection manner between the gasket 13 and the housing body 111 is not limited here. Exemplarily, the gasket 13 and the housing body 111 may be connected by clamping, glueing, fastening or threading. The sealing pad 13 in the embodiment of the present application is, for example, a rubber pad, and the rubber pad is bonded to the bottom of the insertion groove 11 a by glue to prevent sliding.

In one embodiment, the surface of the casing 11 is black. By setting the housing 11 to be black, the light-shielding performance of the coupling device 10 can be improved to a certain extent to prevent light leakage, thereby improving the detection accuracy of the detection system.

In one embodiment, the surface of the gasket 13 is black. By setting the sealing gasket 13 to be black, the light-shielding performance of the coupling device 10 can be improved to a certain extent to prevent light leakage, and furthermore, the detection accuracy of the detection system can be improved.

It should be noted that the specific material of the housing 11 is not limited here. Exemplarily, in one embodiment, the material of the housing 11 is polytetrafluoroethylene, and the material of the housing 11 is made of polytetrafluoroethylene, which is beneficial to Utilizing the elasticity of PTFE itself, the wave-shifting fiber can be better constrained to a certain extent.

It should be noted that the materials of the shell body 111 and the protective cover 112 can be the same, for example, both are polytetrafluoroethylene. Certainly, the materials of the shell body 111 and the protective cover 112 may also be inconsistent.

In the description of the present application, references to the terms "in one embodiment," "in some embodiments," "in other embodiments," "in further embodiments," or "exemplary" mean that The specific features, structures, materials or characteristics described in conjunction with this embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples and features of different embodiments or examples described in the present application without conflicting with each other.

The various embodiments/implementations provided in this application can be combined with each other if no contradiction arises.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. A coupling device of a wave-shifting optical fiber and a photoelectric conversion element, comprising:

the shell is provided with a plugging groove and an opening communicated with the plugging groove, the side wall of the shell, which is positioned on one side opposite to the opening, is provided with at least one plugging channel penetrating through the side wall of the shell, and the shell is connected with the photoelectric conversion element through the plugging groove so that the wave-shifting optical fiber can penetrate through the plugging channel and is coupled with the photoelectric conversion element;

and the elastic clamping piece is at least partially arranged in the plugging channel, and clamps the wave-shifting optical fiber under the action of elasticity in a state that the wave-shifting optical fiber penetrates through the plugging channel.

2. The coupling device according to claim 1, wherein the housing comprises a housing body and a protective cover connected to the housing body, the elastic clamping member is arranged between the housing body and the protective cover, the housing body is provided with the plugging slot and the opening, the housing body is provided with at least one first sub-channel, the protective cover is provided with a second sub-channel corresponding to the first sub-channel, and the first sub-channel and the second sub-channel at least form part of the plugging channel; and/or the number of the groups of groups,

the surface of the shell is black.

3. The coupling device according to claim 2, wherein a receiving groove is formed in a side of the housing adjacent to the second sub-passage, the first sub-passage and the second sub-passage communicate through the receiving groove, and the elastic clamping member is provided in the receiving groove; or alternatively, the first and second heat exchangers may be,

one side of the protective cover, which is close to the first sub-channel, is provided with an accommodating groove, the first sub-channel is communicated with the second sub-channel through the accommodating groove, and the elastic clamping piece is arranged in the accommodating groove.

4. The coupling device according to claim 1, wherein the elastic clamping member is provided with a wire passing passage inside, and the elastic clamping member is gradually contracted from opposite ends to a middle part in an axial direction to form a clamping part, and the clamping part is clamped at a circumferential side of the wave-shifting optical fiber in a state where the wave-shifting optical fiber is inserted into the wire passing passage.

5. The coupling device of claim 4, wherein the side walls of the resilient clip are broken to form open slots, the open slots extending in an axial direction; and/or the number of the groups of groups,

the side wall of the elastic clamping piece forms a deformation groove, and the deformation groove extends along the axial direction.

6. The coupling device according to claim 1, wherein the coupling device comprises a gasket disposed in the insertion groove and abutting against a groove wall of the insertion groove, and the gasket is provided with an insertion hole corresponding to the insertion passage.

7. The coupling device of claim 6, wherein the plug hole has a smaller diameter than the wave-shifting fiber.

8. The coupling device of claim 6, wherein the gasket has a thickness of 1mm-3mm.

9. The coupling device of claim 6, wherein the surface of the gasket is black.

10. The detection system is characterized by comprising a wave-shifting optical fiber, a photoelectric conversion element and the coupling device according to any one of claims 1-9, wherein the photoelectric conversion element is arranged in the plugging groove, the wave-shifting optical fiber penetrates through the plugging channel and is coupled with the photoelectric conversion element, and the elastic clamping piece clamps the wave-shifting optical fiber under the action of elasticity.

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