Optical fiber monitoring equipment

Abstract

The utility model relates to the technical field of optical communication, and provides an optical fiber monitoring device, which comprises an optical module used for photoelectric conversion, a mainboard used for receiving electric signals converted by the optical module, and a shell used for installing the optical module and the mainboard, and is characterized in that the shell is provided with an interface used for accessing an optical fiber to be measured into the optical module; a heat dissipation fan for heat dissipation of the mainboard and a vibration reduction structure for reducing vibration caused by the heat dissipation fan are further arranged in the shell, and the heat dissipation fan is arranged on the mainboard. According to the optical fiber monitoring equipment provided by the utility model, the influence of the vibration of the heat dissipation fan on the mainboard on the optical module is reduced by designing the vibration reduction structure, so that the monitoring precision of the equipment is improved, and the service life of the optical module is prolonged at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of optical communications, in particular to an optical fiber monitoring device. Background Art

[0002] Fiber optic monitoring equipment is based on Rayleigh scattered light and OTDR technology. When external disturbances occur around an optical cable, they cause changes in the reflectivity of the communication fiber, further leading to changes in the optical phase and scattered light intensity. By calculating the scattered light intensity and phase difference at adjacent moments, the disturbance location can be determined, and vibration information can be restored. This allows monitoring of the optical path status and rapid early warning of external damage, breakpoints, and various vibration events along the fiber. In practice, the optical module in the fiber access device performs photoelectric conversion. The mainboard then receives the electrical signal and performs calculations to analyze the reflectivity changes within the communication fiber. This information provides the scattered light intensity and phase difference at adjacent moments, allowing the disturbance location to be calculated.

[0003] Since the processing chip in the motherboard consumes a lot of power, a dedicated cooling fan is required to dissipate the heat. However, since the device contains high-precision components such as optical modules, the vibration generated by the cooling fan during operation will affect the operation of the optical modules. In the existing technology, the motherboard and the optical module are usually designed to be far apart to reduce the impact of the cooling fan on the optical module. However, due to the size of the product, the optical module will still be disturbed by the vibration of the cooling fan. Utility Model Content

[0004] The purpose of the utility model is to provide an optical fiber monitoring device, which can at least solve some of the defects in the prior art.

[0005] To achieve the above-mentioned purpose, an embodiment of the present utility model provides the following technical solution: an optical fiber monitoring device, comprising an optical module for photoelectric conversion and a mainboard for receiving the electrical signal converted by the optical module, and also comprising a shell for mounting the optical module and the mainboard, the shell having an interface for connecting the optical fiber to be tested to the optical module, the shell also being provided with a heat dissipation fan for dissipating heat from the mainboard and a vibration reduction structure for reducing the vibration caused by the heat dissipation fan, the heat dissipation fan being installed on the mainboard.

[0006] Furthermore, the vibration reduction structure includes a first support rod provided on the bottom plate of the shell and a first spring installed on the first support rod, the main board is installed on the first support rod, and there is a gap between the main board and the bottom plate, and the first spring is located in the gap.

[0007] Furthermore, the first support rod includes a first column falling on the base plate and a second column arranged on the first column. A first support plate is also provided on the end surface of the first column for the second column to be installed. The first spring is sleeved on the second column and one end of the first spring abuts against the first support plate, and the other end of the first spring abuts against the main board.

[0008] Furthermore, there are multiple first support rods and multiple first springs, and each of the first support rods is evenly distributed between the bottom plate and the main plate.

[0009] Furthermore, the vibration reduction structure also includes a second support rod provided on the bottom plate of the shell and a second spring installed on the second support rod. The optical port end of the optical module is installed on the second support rod, and there is a gap between the optical port end and the bottom plate, and the second spring is located in the gap.

[0010] Furthermore, the second support rod includes a second column falling on the base plate and a second column arranged on the second column. A second support plate is also provided on the end surface of the second column for the second column to be installed. The second spring is sleeved on the second column and one end of the second spring abuts against the second support plate, and the other end of the second spring abuts against the optical port end.

[0011] Furthermore, there are a plurality of the second support rods and the second springs, and the second support rods are evenly distributed between the bottom plate and the optical port.

[0012] Furthermore, an air inlet fan and an air outlet fan are also provided on the shell.

[0013] Furthermore, a vibration damping pad is provided between at least one of the air inlet fan and the air outlet fan and the housing.

[0014] Furthermore, the mainboard is connected to a display screen, and the display screen is mounted on the housing.

[0015] Compared with the existing technology, the beneficial effect of the present invention is: an optical fiber monitoring device, which reduces the impact of the vibration of the heat dissipation fan on the mainboard on the optical module by designing a vibration reduction structure, thereby improving the monitoring accuracy of the device and extending the service life of the optical module of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of an optical fiber monitoring device provided by an embodiment of the present utility model;

[0017] Figure 2 A schematic diagram of a first perspective of a fiber optic monitoring device with its top panel opened provided by an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of a fiber optic monitoring device provided by an embodiment of the present invention with the top panel of the housing opened from a second viewing angle;

[0019] Figure 4 A schematic diagram showing the cooperation between the bottom plate and the main plate of a housing of an optical fiber monitoring device provided by an embodiment of the present utility model from a first perspective;

[0020] Figure 5 A schematic diagram showing the cooperation between the bottom plate and the main plate of a housing of an optical fiber monitoring device provided by an embodiment of the present utility model from a second perspective;

[0021] Figure 6 A schematic diagram of the cooperation between a first support rod and a first spring of an optical fiber monitoring device provided by an embodiment of the present utility model;

[0022] Figure 7 A schematic diagram of an air outlet fan of an optical fiber monitoring device provided in an embodiment of the present utility model;

[0023] In the accompanying drawings, 1 is a shell; 10 is a bottom plate; 11 is an interface; 2 is an optical module; 20 is an optical port; 3 is a main board; 4 is a cooling fan; 5 is a first support rod; 50 is a first column; 51 is a second column; 52 is a first support plate; 6 is a first spring; 7 is an air inlet fan; 8 is an air outlet fan; 80 is a vibration damping pad; 9 is a display screen. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 1 to 7The present invention provides an optical fiber monitoring device, comprising an optical module 2 for photoelectric conversion and a mainboard 3 for receiving the electrical signal converted by the optical module 2. The device also includes a housing 1 for housing the optical module 2 and the mainboard 3. The housing 1 has an interface 11 for connecting the optical fiber to be tested to the optical module 2. The housing 1 is also provided with a heat dissipation fan 4 for dissipating heat from the mainboard 3 and a vibration reduction structure for reducing the vibration caused by the heat dissipation fan 4. The heat dissipation fan 4 is mounted on the mainboard 3. In this embodiment, the vibration reduction structure is designed to reduce the impact of the vibration of the heat dissipation fan 4 on the mainboard 3 on the optical module 2, thereby improving the monitoring accuracy of the device and extending the service life of the optical module 2 of the present application. Specifically, this embodiment does not improve the optical module 2 and the mainboard 3. Both the optical module 2 and the mainboard 3 use existing equipment, which are respectively used for photoelectric conversion and post-processing and displaying the results of receiving the electrical signal. The device is based on Rayleigh scattered light and OTDR technology to achieve optical fiber monitoring. These are existing technologies and will not be described in detail here. In the process of use, this embodiment finds that the chip used by the motherboard 3 for processing signals consumes too much power and generates serious heat, so a heat dissipation fan 4 is used to dissipate heat, just like the CPU in a computer is equipped with a separate heat dissipation fan. However, since the heat dissipation fan 4 will generate vibrations when it is working, and the motherboard 3 is close to the optical module 2, the optical fiber access at the optical port 20 of the optical module 2 will be unstable, resulting in the problem of low monitoring accuracy. In order to solve this technical problem, this embodiment adopts a vibration reduction structure to slow down the vibration caused by the heat dissipation fan 4. Preferably, the housing 1 has multiple interfaces 11 for selective access of different optical fibers, and the optical port 20 of the optical module 2 in the housing 1 also has multiple matching access ports to choose from.

[0026] See also Figures 1 to 7 The above-mentioned vibration reduction structure is further described. The vibration reduction structure includes a first support rod 5 provided on the bottom plate 10 of the housing 1 and a first spring 6 mounted on the first support rod 5. The mainboard 3 is mounted on the first support rod 5, and there is a gap between the mainboard 3 and the bottom plate 10. The first spring 6 is located in the gap. In this embodiment, vibration reduction can be achieved by using a support rod in conjunction with a spring. The spring is provided between the bottom plate 10 of the housing 1 and the mainboard 3. This allows the mainboard 3 to be suspended in the air under the elastic support of the spring. Even if the mainboard 3 vibrates due to the vibration of the cooling fan 4, the vibration force can be mitigated by the spring, thereby reducing the vibration transmitted to the optical module 2 through the bottom plate 10 of the housing 1.

[0027] See also Figures 1 to 7The first support rod 5 described above is further described as comprising a first column 50 resting on the base plate 10 and a second column 51 mounted on the first column 50. A first support plate 52 is also provided on the end surface of the first column 50 on which the second column 51 is mounted. The first spring 6 is sleeved on the second column 51, with one end of the first spring 6 abutting the first support plate 52 and the other end abutting the main board 3. In this embodiment, the support rod is formed by two coaxial columns, specifically connected by threads. The diameter of the second column 51 is smaller than that of the first column 50. The foot end of the first column 50 is connected to the base plate 10 of the housing 1, while the first column 50 is connected to the main board 3. The spring is supported by the support plate and is compressed between the main board 3 and the support plate. Preferably, there are multiple first support rods 5 and multiple first springs 6, each of which is evenly distributed between the base plate 10 and the main board 3. By designing multiple first support rods 5, the vibration reduction effect can be improved.

[0028] See also Figures 1 to 7 In addition to reducing the vibration below the mainboard 3, a vibration reduction device can also be designed at the optical port end 20 of the optical module 2. In this way, even if vibration is still transmitted to the optical module 2 through the bottom plate 10 of the housing 1 after the first support rod 5 and the first spring 6 cooperate to reduce vibration, the vibration can be completely eliminated by the vibration reduction device designed for the optical module 2, thereby completely avoiding the influence of vibration on the optical module 2. Specifically, the vibration reduction method can be consistent with the vibration reduction method of the above-mentioned mainboard 3. For example, the vibration reduction structure also includes a second support rod provided on the bottom plate 10 of the housing 1 and a second spring installed on the second support rod. The optical port end 20 of the optical module 2 is installed on the second support rod, and there is a gap between the optical port end 20 and the bottom plate 10. The second spring is located in the gap. Preferably, the second support rod includes a second column 51 falling on the bottom plate 10 and a second column 51 provided on the second column 51. The end surface of the second column 51 for installing the second column 51 is also provided with a second support plate. The second spring is sleeved on the second column 51 and one end of the second spring abuts on the second support plate, and the other end of the second spring abuts on the optical port end 20. There are multiple second support rods and multiple second springs, and each second support rod is evenly distributed between the bottom plate 10 and the optical port end 20. The functions of the second support rod and the second spring are not repeated here. The optical port 20 is the end of the optical module connected to the external optical fiber cable.

[0029] See also Figures 1 to 7The housing 1 is also provided with an air inlet fan 7 and an air outlet fan 8. In this embodiment, the air inlet fan 7 is designed to allow air outside the housing 1 to enter the housing 1, and the air outlet fan 8 is designed to exhaust hot air from the housing 1 to the outside of the housing 1. Preferably, a vibration damping pad 80 is provided between at least one of the air inlet fan 7 and the air outlet fan 8 and the housing 1. Vibration damping measures may optionally be provided on both fans to prevent vibrations from being transmitted through the housing 1 to the optical module 2 during operation.

[0030] See also Figures 1 to 7 The motherboard 3 is connected to a display screen 9 mounted on the housing 1. In this embodiment, the electrical signals processed by the motherboard 3 can be displayed in real time on the display screen 9, making it convenient for staff to view. The wiring harness connecting the motherboard 3, optical module 2, and display screen 9 in the housing 1 is not shown in the figure; an appropriate communication wiring harness can be selected as needed.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An optical fiber monitoring device comprising an optical module for photoelectric conversion and a mainboard for receiving the electrical signal converted by the optical module, characterized in that: It also includes a shell for installing the optical module and the mainboard. The shell has an interface for the optical fiber to be tested to connect to the optical module. The shell is also provided with a heat dissipation fan for dissipating heat from the mainboard and a vibration reduction structure for reducing the vibration caused by the heat dissipation fan. The heat dissipation fan is installed on the mainboard.

2. The optical fiber monitoring device according to claim 1, wherein: The vibration reduction structure includes a first support rod provided on the bottom plate of the shell and a first spring installed on the first support rod. The main board is installed on the first support rod, and there is a gap between the main board and the bottom plate. The first spring is located in the gap.

3. The optical fiber monitoring device according to claim 2, wherein: The first support rod includes a first column falling on the base plate and a second column arranged on the first column. A first support plate is also provided on the end surface of the first column for the second column to be installed. The first spring is sleeved on the second column and one end of the first spring abuts against the first support plate, and the other end of the first spring abuts against the main board.

4. The optical fiber monitoring device according to claim 2, wherein: There are a plurality of first support rods and a plurality of first springs, and each of the first support rods is evenly distributed between the bottom plate and the main plate.

5. The optical fiber monitoring device according to claim 1, wherein: The vibration reduction structure also includes a second support rod provided on the bottom plate of the shell and a second spring installed on the second support rod. The optical port end of the optical module is installed on the second support rod, and there is a gap between the optical port end and the bottom plate, and the second spring is located in the gap.

6. The optical fiber monitoring device according to claim 5, characterized in that: The second support rod includes a second column falling on the base plate and a second column arranged on the second column. A second support plate is also provided on the end surface of the second column for the second column to be installed. The second spring is sleeved on the second column and one end of the second spring abuts against the second support plate, and the other end of the second spring abuts against the optical port end.

7. The optical fiber monitoring device according to claim 5, characterized in that: There are a plurality of the second support rods and the second springs, and the second support rods are evenly distributed between the bottom plate and the optical port end.

8. The optical fiber monitoring device according to claim 1, wherein: The shell is also provided with an air inlet fan and an air outlet fan.

9. The optical fiber monitoring device according to claim 8, characterized in that: A vibration damping pad is provided between at least one of the air inlet fan and the air outlet fan and the housing.

10. The optical fiber monitoring device according to claim 1, characterized in that: The mainboard is connected to a display screen, and the display screen is arranged on the shell.

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