Fault detection device for passive optical network equipment and passive optical network equipment

Abstract

The present application relates to a fault detection device for a passive optical network device and a passive optical network device, which includes: a housing provided with two interfaces for receiving optical signals; a detection member including a movable portion and a transflective portion, wherein the movable portion is movably connected within the housing, and the transflective portion is connected to the movable portion, and the transflective portion is configured to follow the movement of the movable portion and, depending on whether it connects to the optical signal, form a first optical path and a second optical path within the housing respectively; a correction portion connected to the movable portion and configured to connect to the formed first optical path or second optical path and adjust the direction of the first optical path or second optical path so that the first optical path and the second optical path approach each other at the end. This ensures that, when the transflective portion connects to the optical signal, the formed first optical path and the second optical path can be relatively close to or overlap at the end position. After the transflective portion connects to the optical signal, the loss of the optical signal when entering the optical fiber at the end position is effectively reduced, thereby ensuring the performance of the passive optical network.

Description

Technical Field

[0001] The present application relates to the field of passive optical network equipment, and in particular to a fault detection device for passive optical network equipment and the passive optical network equipment. Background Art

[0002] As the coverage and installation volume of passive network equipment expand, ensuring the security of optical fiber communication signals within passive fiber cabinets, boxes, and enclosures becomes increasingly important. The closed doors of passive fiber cabinets, boxes, and enclosures play a key role in protecting the equipment inside from damage, water, and dust. Similarly, ensuring that no water accumulates within the cabinets, boxes, or enclosures is a prerequisite for the proper functioning of passive optical components.

[0003] At present, it is common to connect a fault detection device in series with the optical link of a passive optical network device. The fault detection device is equipped with a reflector that can enter and move out of the optical link. When a fault occurs in the passive optical network device, the reflector of the fault detection device enters the optical link and reflects optical signals of some frequencies, while transmitting optical signals of other frequencies. When the detection device receives the changed optical signal, it can determine that the passive optical network device has failed and issue an alarm.

[0004] However, in the above scheme, although the frequency of the optical signal passing through the reflector can be changed by reflecting the optical signal of a certain frequency and then detected and identified, the transmitted optical signal will inevitably be refractively offset. When the offset of the front and rear optical signals is large, the portion of the subsequent optical signal that can be successfully received will be reduced when the reflector enters the optical link, resulting in a large optical signal loss, which in turn affects the performance of the passive optical network. Summary of the Invention

[0005] The embodiments of the present application provide a fault detection device for a passive optical network device and a passive optical network device to solve the problem in the related art that when a reflector is used to change the frequency of an optical signal for device status detection, the optical signal suffers a large loss after being refracted by the reflector.

[0006] In a first aspect, a fault detection device for a passive optical network device is provided, which adopts the following technical solution:

[0007] A fault detection device for a passive optical network device, comprising:

[0008] A housing having two interfaces for receiving optical signals;

[0009] The detection member includes a movable portion and a transflective portion, wherein the movable portion is movably connected within the housing, the transflective portion is connected to the movable portion, and the transflective portion is configured to follow the movement of the movable portion and form a first optical path and a second optical path within the housing according to whether it is connected to the optical signal;

[0010] The correction part is connected to the movable part and is configured to connect the first optical path or the second optical path formed and change the direction of the first optical path or the second optical path so that the first optical path and the second optical path approach each other at the end.

[0011] In some embodiments, the correction unit is configured to connect and change the direction of the first optical path when the transflective unit does not connect to the optical signal.

[0012] In some embodiments, the correction portion is a transmissive body for refracting light signals.

[0013] In some embodiments, the correcting portion and the transflective portion are positioned in the same position relative to the housing when connecting optical signals, and have the same refractive index as the transflective portion, so that the first optical path and the second optical path overlap.

[0014] In some embodiments, at least a portion of the surface of the correction portion that interfaces with the optical signal is provided with an anti-reflection film.

[0015] In some embodiments, the correction unit includes at least two reflectors, so that the light signal is reflected by the multiple reflectors in sequence to change the direction of the first light path.

[0016] In some embodiments, the correction portion includes four reflectors distributed in a rectangular shape, and the transflective portion is arranged in a rectangular area surrounded by the four reflectors, and the four reflectors are configured to reflect the light signal to form the first optical path that bypasses the transflective portion.

[0017] In some embodiments, the correction portion and the transflective portion are continuously arranged in the moving direction of the movable portion, so that when the movable portion moves, the optical signal can directly transition from docking with the correction portion or the transflective portion to docking with the other one.

[0018] In some embodiments, the shell is provided with an installation cavity for installing the movable part, and the movable part is movably arranged to slide in a straight line direction in the installation cavity. The inner wall of one side of the installation cavity is provided with a guide protrusion extending along the sliding direction of the movable part, and the inner wall of the other side of the installation cavity is provided with a pressure spring, and the end of the pressure spring presses the movable part onto the guide protrusion and slides with the movable part.

[0019] In a second aspect, a passive optical network device is provided, which adopts the following technical solution:

[0020] A passive optical network device comprises the fault detection device as described above.

[0021] The beneficial effects of the technical solution provided by this application include:

[0022] The embodiments of the present application provide a fault detection device for a passive optical network device and a passive optical network device. The correction unit is used to determine whether the transflective unit is connected to the optical signal, so that the first optical path and the second optical path formed at the end position can be in a relatively close or overlapping position. After the transflective unit is connected to the optical signal, the loss of the optical signal when entering the optical fiber at the end position is effectively reduced, thereby ensuring the performance of the passive optical network. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 This is a schematic cross-sectional view of the first embodiment of the present application;

[0025] Figure 2 This is a schematic cross-sectional view of the second embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the shell structure of this application;

[0027] Figure 4 A schematic diagram of the housing structure connecting the front cover and the rear cover of this application;

[0028] Figure 5 This is a schematic diagram showing the positional relationship between the compression spring and the movable portion when the rear cover is not shown in this application;

[0029] Figure 6 This is a schematic diagram of the back cover structure of this application.

[0030] In the picture:

[0031] 1. Housing; 10. Interface; 11. Mounting cavity; 12. Guide protrusion; 120. Avoidance groove; 13. Pressed spring; 14. Linkage hole; 15. Linkage shaft; 16. Front cover; 17. Rear cover; 170. Mounting hole; 18. Return spring;

[0032] 20. Movable part; 21. Transflective part; 22. Correction part; 221. Reflector. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] Currently, a common approach is to connect a fault detection device in series with the optical link of a passive optical network device. The fault detection device is equipped with a reflector that can enter and exit the optical link. When a fault occurs in the passive optical network device, the reflector of the fault detection device enters the optical link and reflects optical signals of certain frequencies while transmitting other optical signals. When the detection device receives the altered optical signal, it determines that the passive optical network device is faulty and issues an alarm. However, in this solution, while the frequency of the optical signal passing through the reflector is altered by reflecting the optical signal of certain frequencies for detection and identification, the transmitted optical signal will inevitably experience refraction offset. If the offset between the preceding and following optical signals is large, the portion of the subsequent optical signal that can be successfully received will be reduced when the reflector enters the optical link, resulting in significant optical signal loss, which in turn affects the performance of the passive optical network.

[0035] The present application provides a fault detection device for a passive optical network device and a passive optical network device. The key point of the invention is that, through the correction part 22, when the transflective part 21 is connected to the optical signal, the first optical path and the second optical path formed can be in a relatively close or overlapping position at the end position. After the transflective part 21 is connected to the optical signal, the loss of the optical signal when entering the optical fiber at the end position is effectively reduced, thereby ensuring the performance of the passive optical network.

[0036] In a first aspect, a fault detection device for a passive optical network device is provided.

[0037] A fault detection device for a passive optical network device, comprising:

[0038] The housing 1 is provided with two interfaces 10 for receiving optical signals;

[0039] The detection member includes a movable portion 20 and a transflective portion 21. The movable portion 20 is movably connected to the housing 1. The transflective portion 21 is connected to the movable portion 20. The transflective portion 21 is configured to follow the movement of the movable portion 20 and form a first optical path and a second optical path in the housing 1 according to whether it is connected to the optical signal.

[0040] The correction part 22 is connected to the movable part 20 and is configured to connect with the first optical path or the second optical path formed and change the direction of the first optical path or the second optical path so that the first optical path and the second optical path approach each other at the end.

[0041] Specifically, in different embodiments, the correction unit 22 can adjust the path of the first optical path or the second optical path. For example, in some embodiments (not shown in the figure), the first optical path formed by the transflective unit 21 not docking the optical signal is not adjusted. The position of the correction unit 22 satisfies the situation that when the transflective unit 21 moves to dock the optical signal and forms the second pipeline, it docks the second pipeline and adjusts the second optical path, thereby making the second optical path and the first optical path close to or overlap each other at the end position. In this process, the correction unit 22 can change the direction of the second optical path in the form of reflection and / or refraction; for example, in other embodiments (see Figure 1 or Figure 2 ), firstly, the first optical path is adjusted. When the transflective portion 21 is not connected to the optical signal, the correction portion 22 is connected to the first optical path, and the straight path of the first optical path is changed through reflection and / or refraction, so that the end position of the first optical path and the end position of the second optical path formed when the optical signal passes through the transflective portion 21 are close to or overlap with each other.

[0042] With this arrangement, the correction part 22 can ensure that when the transflective part 21 is connected to the optical signal, the first optical path and the second optical path formed can be in a relatively close or overlapping position at the end position, so that after the transflective part 21 is connected to the optical signal, the loss of the optical signal when entering the optical fiber at the end position is effectively reduced, thereby ensuring the performance of the passive optical network.

[0043] Reference Figure 1 or Figure 2 Optionally, the correction unit 22 is configured to connect and change the direction of the first optical path when the transflective unit 21 does not connect to the optical signal.

[0044] Specifically, the correction part 22 and the transflective part 21 are arranged on the movable part 20 in the moving direction of the movable part 20, so that when the movable part 20 moves, the correction part 22 or the transflective part 21 can connect the optical signal to form the first optical path or the second optical path.

[0045] In this way, the present embodiment forms a first optical path that matches the second optical path in advance by setting the correction part 22, so that its end position approaches or overlaps with the second optical path, meeting the reception requirements of the optical signal. Compared with the installation position when the second optical path is corrected by the correction part 22, the installation position of the correction part 22 in the present embodiment has a wider range of options, and is less difficult in space design and installation, which is beneficial to actual production and processing. In addition, it is worth noting that the correction part 22 in the present embodiment can achieve the same position as the transflective part 21 when docking the optical signal. Furthermore, when the correction part 22 adopts a material with the same refractive index as the transflective part 21, the first optical path and the second optical path can be directly overlapped. When the second optical path is adjusted by the correction part 22, since the position of the correction part 22 needs to be recalculated and installed, the production difficulty is increased, and position or angle errors are inevitable during the installation process, resulting in an objective deviation between the first optical path and the second optical path under this scheme, which is not conducive to the transmission of the optical signal.

[0046] Reference Figure 1 In some embodiments, the correction portion 22 is a transmissive body for refracting light signals.

[0047] Furthermore, the correction part 22 and the transflective part 21 are positioned in the same position relative to the housing 1 when connecting optical signals, and the correction part 22 and the transflective part 21 have the same refractive index, so that the first optical path and the second optical path overlap.

[0048] This arrangement facilitates the installation of the correction portion 22 and the transflective portion 21. Both can utilize the same transmissive body. Furthermore, when using this transmissive body to form the transflective portion 21, it is only necessary to form a reflective layer on the transmissive body that can reflect optical signals of a specific frequency to obtain the desired transflective portion 21, effectively reducing processing difficulty and production costs. Furthermore, because the two portions are positioned identically when connecting optical signals and have the same refractive index, adjusting the direction of the first optical path so that it coincides with the second optical path facilitates the complete reception of the optical signal and also facilitates the practical fabrication of the fault detection device for passive optical network equipment provided herein.

[0049] Furthermore, in some other embodiments where the correction portion 22 utilizes a transmissive member, the refractive index of the correction portion 22 may differ from that of the transflective member 21, and the initial position of the correction portion 22 may be adjusted based on the difference in refractive index to ensure that the first and second optical paths formed by the correction portion 22 coincide with each other at the end of the interface 10. Compared to the aforementioned embodiments in which the correction portion 22 and transflective member 21 have the same refractive index, such embodiments require the use of an additional transmissive member with a refractive index that meets the calculation requirements, and the selection of the position also requires further calculation. This is relatively more difficult, and positional and angular deviations are unavoidable during installation, resulting in objective deviations between the first and second optical paths.

[0050] Furthermore, at least a portion of the surface of the correction portion 22 that is used to interface with the optical signal is provided with an anti-reflection film.

[0051] With this arrangement, while utilizing the correction part 22 to refract the optical signal in advance to form the first optical path, the anti-reflection film can be used to effectively reduce the reflection phenomenon of the optical signal on the correction part 22, thereby effectively avoiding excessive reflection loss of the optical signal when passing through the correction part 22 into another interface 10, thereby improving the stability of the passive optical network.

[0052] Reference Figure 2 In other embodiments, the correction unit 22 includes at least two reflectors 221, so that the optical signal is reflected in sequence by the multiple reflectors 221 to change the direction of the first optical path.

[0053] With this arrangement, the correction part 22 forms a first optical path through multiple reflections when connecting to the optical signal. Compared with using a transmissive body as the correction part 22, this embodiment can avoid the loss of the optical signal at the correction part 22 because the optical signal cannot pass through the total reflector 221 of the correction part 22, thereby further ensuring the stability of the passive optical network.

[0054] Furthermore, the correction part 22 includes four reflectors 221 distributed in a rectangular shape, and the transflective part 21 is arranged in a rectangular area surrounded by the four reflectors 221. The four reflectors 221 are configured to reflect the light signal to form the first optical path that bypasses the transflective part 21.

[0055] With this arrangement, while the first optical path avoids the transflective portion 21, the overall arrangement range of the correction portion 22 and the transflective portion 21 provided on the movable portion 20 can be more concentrated, thereby reducing the space required for the two on the movable portion 20 and in the shell 1, which is beneficial to actual processing and production.

[0056] Optionally, the correction part 22 and the transflective part 21 are continuously arranged in the moving direction of the movable part 20, so that when the movable part 20 moves, the optical signal can be directly transferred from the correction part 22 or the transflective part 21 to the other one.

[0057] This arrangement enables the optical signal to directly transition between the correction part 22 and the transflective part 21, and further enables the first optical path and the second optical path to directly transition, thereby avoiding the optical signal being unable to be transmitted to the interface 10 on the other side to be received during this process, thereby ensuring the stability of the passive optical network.

[0058] Reference Figure 3Optionally, a mounting cavity 11 for mounting the movable part 20 is provided in the shell 1, and the movable part 20 is movably arranged to slide in a linear direction in the mounting cavity 11. A guide protrusion 12 extending along the sliding direction of the movable part 20 is provided on the inner wall of one side of the mounting cavity 11, and a pressing spring 13 is provided on the inner wall of the other side of the mounting cavity 11. The end of the pressing spring 13 presses the movable part 20 onto the guide protrusion 12 and slides with the movable part 20.

[0059] Specific, combined Figure 1 and Figure 3 In this embodiment, the housing 1 is provided with a linkage hole 14 that connects the mounting cavity 11 with the external space. The movable portion 20 is connected to a linkage shaft 15 that extends to the outside through the linkage hole 14. The linkage shaft 15 is then used to coordinate with the environment outside the housing 1, such as the opening and closing of the cabinet door, changes in temperature and humidity, etc., so that the movable portion 20 can be driven to move in a linear direction when a specific state of the environment changes. At the same time, a reset spring 18 (see FIG. 1 ) is provided in the housing 1 for cooperating with the reset of the movable portion 20. Figure 5 ), the return spring 18 is connected to the side of the movable part 20 away from the movable axis, and through its return elasticity, it further cooperates with the specific changes in the environment to control the reciprocating movement of the movable part 20, thereby achieving the purpose of correspondingly changing the current state of the optical signal in the shell 1.

[0060] In this process, since it is necessary to control the accuracy of the movement of the movable part 20 as accurately as possible to ensure that when the environment changes accordingly, the correction part 22 or the transflective part 21 can accurately connect the optical signal, it is necessary to ensure that the movable part 20 located in the housing 1 has fewer influencing factors when moving. Then, by setting the guide protrusions 12 on both sides of the mounting cavity 11 and the pressure spring 13, the movable part 20 can be stably pressed onto the guide protrusion 12, and the friction between the two is kept in a relatively stable state. At the same time, since the two sides of the movable part 20 slide in contact with the guide protrusion 12 and the pressure spring 13 respectively, the movable part 20 can be stably pressed onto the guide protrusion 12. The contact areas on both sides of the end faces of the spring 13 are controlled at a relatively small level, thereby avoiding large-area surface-to-surface contact between the movable part 20 and the inner wall of the mounting cavity 11. To further improve this effect, in some embodiments, the contact surface of the guide protrusion 12 with the movable part 20 can be provided as a convex arc surface, so that there is line-surface contact between the guide protrusion 12 and the movable part 20, thereby further reducing the influence of friction on the movable part 20 when moving along a straight line, effectively improving the stability of the movable part 20 during movement, and thereby improving the accuracy of the position of the correction part 22 and the reflective part 21 during use.

[0061] In order to prevent the guide protrusion 12 from blocking the light signal, an avoidance groove 120 for the light signal to pass through is further provided on the guide protrusion 12, so that the light signal sent from the interface 10 into the shell 1 can smoothly connect with the correction part 22 or the reflective part 21 after crossing the guide protrusion 12, and finally be sent to another interface 10.

[0062] In addition, refer to Figure 4 To facilitate the processing and production of the fault detection device of this embodiment, the installation cavity 11 is formed with openings on both sides of the shell 1. At the same time, the shell 1 also includes a front cover 16 and a rear cover 17 that are detachably connected to its opposite sides by screws, and the front cover 16 and the rear cover 17 are used to close the openings on both sides of the shell 1 to seal the installation cavity 11.

[0063] Further, combined Figure 5 and Figure 6 The rear cover 17 is provided with a mounting hole 170 for mounting the pressure spring 13. When the pressure spring 13 is installed in the mounting cavity 11, the connecting screw is first fixed at one end thereof, and then the pressure spring 13 is detachably mounted on the rear cover 17 with the help of the connecting screw. Finally, as the rear cover 17 is connected to one side of the housing 1, the end of the pressure spring 13 is pressed onto the movable portion 20 in the mounting cavity 11, and the movable portion 20 is pressed onto the guide protrusion 12 with the help of the pressure spring 13.

[0064] Before the front cover 16 is connected to the shell 1 or after it is removed, the opening of the shell 1 that it closes can be used to observe the installed movable part 20 and the correction part 22 and the transflective part 21, so that the operator can judge whether the current positions of the correction part 22 and the transflective part 21 are accurate, and ensure that after the subsequent front cover 16 is installed, the fault detection device provided in this application meets the requirements as a whole.

[0065] In a second aspect, the present application provides a passive optical network device, which includes the fault detection device as described above, which will not be described in detail here.

[0066] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0067] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0068] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A fault detection device for a passive optical network device, characterized in that: It includes: A housing (1) provided with two interfaces (10) for receiving optical signals; A detection component, comprising a movable portion (20) and a transflective portion (21), wherein the movable portion (20) is movably connected to a housing (1), and the transflective portion (21) is connected to the movable portion (20), and the transflective portion (21) is configured to follow the movable portion (20) during movement and, depending on whether it is connected to an optical signal, form a first optical path and a second optical path in the housing (1); a correction portion (22) connected to the movable portion (20) and configured to connect the first optical path or the second optical path formed and change the direction of the first optical path or the second optical path so that the first optical path and the second optical path approach each other at the end; The correction part (22) is configured to connect and change the direction of the first optical path when the transflective part (21) does not connect to the optical signal; The correction part (22) includes at least two reflectors (221), and the reflectors (221) are configured to allow the first light path to bypass the transflective part (21) through multiple reflections.

2. The fault detection device for passive optical network equipment according to claim 1, characterized in that: The correction part (22) is a transmissive body used for refracting light signals.

3. The fault detection device for passive optical network equipment according to claim 2, characterized in that: The correction part (22) and the transflective part (21) are positioned in the same relative position to the housing (1) when connecting optical signals, and the correction part (22) and the transflective part (21) have the same refractive index, so that the first optical path and the second optical path overlap.

4. The fault detection device for passive optical network equipment according to claim 2, characterized in that: At least a portion of the surface of the correction portion (22) used for connecting to the optical signal is provided with an anti-reflection film.

5. The fault detection device for passive optical network equipment according to claim 1, characterized in that: The correction portion (22) includes four reflectors (221) distributed in a rectangular shape, and the transflective portion (21) is arranged in a rectangular area surrounded by the four reflectors (221). The four reflectors (221) are configured to reflect light signals so as to form the first light path that bypasses the transflective portion (21).

6. The fault detection device for passive optical network equipment according to claim 1, characterized in that: The correction part (22) and the transflective part (21) are continuously arranged in the moving direction of the movable part (20), so that when the movable part (20) moves, the optical signal can be directly transferred from the correction part (22) or the transflective part (21) to the other one.

7. The fault detection device for passive optical network equipment according to claim 1, characterized in that: The housing (1) is provided with a mounting cavity (11) for mounting the movable part (20); the movable part (20) is arranged to slide in a straight line direction in the mounting cavity (11); an inner wall on one side of the mounting cavity (11) is provided with a guide protrusion (12) extending along the sliding direction of the movable part (20); an inner wall on the other side of the mounting cavity (11) is provided with a pressing spring (13); an end of the pressing spring (13) presses the movable part (20) onto the guide protrusion (12) and slides with the movable part (20).

8. A passive optical network device, characterized in that: It comprises the fault detection device as claimed in claim 1.

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