Deepwater multi-core optical connector implanted with optical fiber sensor and control method of deepwater multi-core optical connector

Abstract

The invention discloses an optical connector integrated with an optical fiber sensor, and aims to provide an optical connector capable of monitoring the key state of the connector in real time in various environments such as deep sea and the like. According to the deepwater multi-core optical connector implanted with the optical fiber sensors and the control method of the deepwater multi-core optical connector, the problem that in-situ monitoring cannot be achieved through a traditional optical connector is solved, and the deepwater multi-core optical connector implanted with the optical fiber sensors is characterized in that a plurality of optical fiber grating sensors are arranged in the connector and are configured to be used for detecting the working and fixing states of the connector; comprise but not limited to parameters such as temperature, pressure, deformation and humidity, the fiber grating sensor is very sensitive to tiny changes of physical quantities such as temperature and strain force, changes of stress and humidity in the connector can be detected in time with high precision, and the deep-sea fiber grating sensor is suitable for the field of deep-sea fiber communication.

Description

Technical Field

[0001] The present invention relates to an optical connector integrated with an optical fiber sensor, and more particularly to a deep-water multi-core optical connector implanted with an optical fiber sensor and a control method thereof. Background Art

[0002] In deep-sea fiber-optic communication systems, optical connectors are key passive components used to connect underwater optical devices. Traditional optical connectors mainly focus on optimizing connection loss and return loss to improve the transmission performance of the system. However, as fiber-optic communication systems develop towards higher rates and larger capacities, higher requirements are placed on the stability and reliability of optical connectors. Especially in harsh deep-sea environments or critical application scenarios, real-time monitoring of the status of optical connectors becomes particularly important. On the one hand, through monitoring, the performance degradation law of products under deep-sea conditions can be understood. On the other hand, a basic evaluation system can be established through relevant data collection to predict product life. Although there are some optical connector solutions with sensors on the market, they usually require additional space to integrate sensors, which may affect the compactness and compatibility of the connector. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an optical connector that can monitor the key status of the connector in real time in various environments such as the deep sea, and solve the problem that traditional optical connectors cannot achieve in-situ monitoring by integrating optical fiber sensors.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a deep-water multi-core optical connector with an implanted optical fiber sensor, comprising a connector body, the connector body comprising a plug part and a socket part, the plug part and the socket part are detachably connected, the plug part and the socket part are both covered with a shell, the socket part comprises a rubber sleeve, a cable tail clamp arranged in the rubber sleeve, and a compression screw sleeve arranged in the cable tail clamp, the plug part comprises a plug screw sleeve and a connector arranged in the plug screw sleeve, the plug part and the socket part are detachably connected through the connector, and an optical cable is also arranged in the socket part.

[0005] The present invention is further configured as follows: the connector has a mounting portion arranged in the plug portion and a plug-in portion connected to the socket portion, a slot is provided between the cable tail clamp and the compression nut, and the size of the slot matches the size of the plug-in portion.

[0006] The present invention is further configured as follows: an insulating plate is provided in the joint screw sleeve, a plurality of pin assemblies are provided in the insulating plate, the pin assemblies include a pin pressing sleeve and a sealing gasket provided on the pointer pressing sleeve, a spring is also provided on the pin pressing sleeve, and a pressure plate is also provided at one end of the joint screw sleeve.

[0007] The present invention is further configured as follows: a cable channel is provided in both the rubber sleeve and the cable tail clamp, and a load-bearing member is provided between the compression screw sleeve and the cable channel.

[0008] Preferably, a deformation fiber grating sensor and a humidity fiber grating sensor are provided in the compression screw sleeve, a fiber optic transmission channel is also provided in the pin assembly, and a plurality of optical fibers are provided in the optical cable, each of the optical fibers is respectively connected to the deformation fiber grating sensor, the humidity fiber grating sensor and the fiber optic transmission channel.

[0009] The present invention is further configured as follows: the cable tail clamp is further provided with a plurality of clamping blocks along its length direction, an adjusting screw is provided between each of the clamping blocks and the cable tail clamp, and the clamping blocks and the cable tail clamp control the diameter of the cable channel through the adjusting screw.

[0010] The present invention is further configured as follows: a sealing ring is further provided at the connection between the plug connector and the socket part, and a convex ring is further provided on the outer side of the plug connector, and the convex ring is in conflict with the plug screw sleeve.

[0011] The present application also provides a control method for a deep-water multi-core optical connector implanted with an optical fiber sensor, which, when the detection subject is a deformation optical fiber grating sensor, comprises the following steps: S11, installing the deformation optical fiber grating sensor to the stress concentration part of the connector;

[0012] S12. After the installation is completed, according to the measurement accuracy requirements, select the light source for detection, and adjust the light path between the light source, the optical fiber and the deformation fiber Bragg grating sensor to couple them, and record the wavelength measured by the deformation fiber Bragg grating sensor in the current state as L0;

[0013] S13, during the operation of the connector, the wavelength deformation threshold is set to L1, the wavelength data measured by the deformation fiber Bragg grating sensor is detected, and the wavelength data is processed and analyzed, and the wavelength measured by the current deformation fiber Bragg grating sensor is detected to be L2;

[0014] S14, detecting the state of L2, if L2>L1, it is judged that the current optical fiber deformation is too large, the current water pressure outside the connector is too large, and the staff needs to repair the connector, otherwise, it is judged that the current connector is operating normally;

[0015] When the detection subject is a humidity fiber Bragg grating sensor, the method comprises the following steps: S21, installing the humidity fiber Bragg grating into the compression screw sleeve;

[0016] S22, after the installation is completed, the wavelength detected by the current humidity fiber grating sensor in the dry state is L3;

[0017] S23, gradually increasing the ambient humidity, and detecting the ambient wavelength detected by the humidity fiber grating sensor multiple times, to obtain a corresponding relationship between wavelength and humidity;

[0018] S24, after the wavelength change is stabilized, the connector is placed in an undetected working environment for operation;

[0019] S25. During the operation of the connector, the wavelength corresponding to the humidity threshold is set to D1, the wavelength data measured by the humidity fiber grating sensor is detected, and the change in wavelength is converted into the corresponding humidity value D2. If D2>D1, it is judged that the humidity in the current compression screw sleeve is too high and the staff needs to repair the connector. Otherwise, it is judged that the current connector is operating normally.

[0020] By adopting the above technical solution, the beneficial effects are as follows: 1. By arranging multiple fiber grating sensors in the connector, the above fiber grating sensors are configured to detect the working and fixing states of the connector, including but not limited to parameters such as temperature, pressure, deformation, humidity, etc., and the fiber grating sensor is very sensitive to slight changes in physical quantities such as temperature and strain, and can detect changes in stress and humidity in the connector in a timely and high-precision manner, with high sensitivity and accuracy. At the same time, the overall size of the fiber grating sensor is small, and it can be easily installed inside the connector, and can be installed in the stress concentration area inside the connector and the position where humidity needs to be detected according to needs. At the same time, the fiber grating sensor is usually composed of only optical fiber and packaging material, and will not have a significant impact on the overall quality and performance of the connector after being installed in the connector, and a sealing ring is added at the connection between the plug part and the socket part, which improves the sealing performance of the connector in a deep-sea environment, improves the overall service life, and has a good use effect.

[0021] 2. Further, in order to facilitate the overall installation, the connector has a plug part and a socket part. The plug part is connected to the socket part through a plug-in connector arranged inside the plug-in part, and can be fixed to the socket part after the plug-in connector is inserted, thereby improving the overall stability after the installation is completed. At the same time, an insulating plate is arranged inside the joint screw sleeve, and a plurality of pin assemblies are arranged inside the insulating plate. The pin assemblies include a pin pressing sleeve and a sealing ring arranged on the pointer pressing sleeve. A spring is also arranged on the pin pressing sleeve. A pressing plate is also arranged at one end of the joint screw sleeve. The cable is fixed to the cable channel in the cable tail clamp through a rubber sleeve and extends to the inside of the compression screw sleeve. At the same time, one end of the cable located inside the compression screw sleeve can lead out a plurality of optical fibers, each The optical fibers are respectively connected to the deformation fiber grating sensor, the humidity fiber grating sensor and the optical fiber transmission channel, so that the cable can be connected to the information transmission equipment and the detection equipment at the same time, ensuring the compactness of the overall structure of the connector and avoiding excessive changes in the overall structure of the connector after adding the sensor. At the same time, the optical fiber sensor has good chemical stability, high mechanical strength and fatigue resistance, can withstand a certain degree of stretching, bending and vibration, and is not prone to performance degradation and damage during long-term use. It has high reliability and good safety performance. The sensor signal is transmitted through the optical fiber, and the transmission loss of the optical signal in the optical fiber is low, which can realize long-distance signal transmission and is convenient for measurement and monitoring.

[0022] 3. At the same time, during the operation of the connector, since the working environment of the connector is in the deep sea and the water pressure is high, the internal state of the connector needs to be detected in real time during the operation. During the operation of the connector, the connection between the plug and the socket is the stress concentration part. By setting a deformation fiber Bragg grating sensor there, the shell deformation caused by the water pressure can be easily detected. The deformation sensor adopts the fiber Bragg grating (FBG) technology. The above technology is based on Bragg diffraction. When a beam of light is irradiated to a fiber Bragg grating with periodic refractive index modulation, the light of a specific wavelength that meets the Bragg condition will be reflected back, and the light of the remaining wavelengths will continue to be transmitted through the grating. The formula of the above Bragg condition is:

[0023] (1)

[0024] in, is the Bragg wavelength, is the effective refractive index of the optical fiber core, For the grating period, specifically, when the connection between the connector and the socket is deformed due to stress, the grating period will respond by lengthening or shortening, and the effective refractive index of the optical fiber core will also change, causing the Bragg wavelength to change and causing the wavelength to shift, so that the staff can determine the strain by the wavelength offset, allowing the staff to monitor the structural integrity of the connector when used underwater in real time, and promptly discover and prevent potential structural problems.

[0025] 4. In order to prevent liquid from entering during the operation of the connector, a humidity fiber grating sensor is provided in the compression screw sleeve. A humidity sensitive material is provided in the humidity fiber grating sensor. When the humidity in the compression screw sleeve of the humidity sensitive material increases, it absorbs water and expands, causing the period or effective refractive index of the fiber grating to change, thereby causing the wavelength to shift. The humidity in the current compression screw sleeve is detected based on the wavelength-humidity correspondence relationship obtained according to the ambient wavelength detected by the humidity fiber grating sensor, which facilitates the prediction of the corrosion risk of the connector and the understanding of the service life of the product in the current depth environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A cross-sectional view of an embodiment of a deep-water multi-core optical connector with an embedded optical fiber sensor and a control method thereof according to the present invention;

[0027] Figure 2 It is a schematic diagram of the specific structure of the plug part of an embodiment of a deep-water multi-core optical connector with an embedded optical fiber sensor and a control method thereof according to the present invention;

[0028] Figure 3 It is a schematic diagram of the specific structure of a pin assembly of an embodiment of a deep-water multi-core optical connector with an embedded optical fiber sensor and a control method thereof according to the present invention;

[0029] Figure 4 It is a control flow chart of an embodiment of a deep-water multi-core optical connector with an optical fiber sensor embedded therein and a control method thereof when the detection subject is a deformation optical fiber grating sensor;

[0030] Figure 5 It is a control flow chart of an embodiment of a deep-water multi-core optical connector with an optical fiber sensor embedded therein and a control method thereof when the detection subject is a humidity optical fiber grating sensor;

[0031] The reference numerals in the figure are as follows: 1. plug part; 11. plug screw sleeve; 12. connector; 13. mounting part; 14. connector part; 15. insulating plate; 16. convex ring; 2. socket part; 21. rubber sleeve; 22. cable tail clamp; 23. pressing screw sleeve; 24. slot; 25. cable channel; 26. load-bearing part; 27. clamping block; 28. adjusting screw; 3. housing; 4. pin assembly; 41. pin pressing sleeve; 42. sealing gasket; 43. spring; 44. pressure plate; 45. optical fiber transmission channel; 5. sealing ring. DETAILED DESCRIPTION

[0032] Reference Figures 1 to 5 The present invention further describes a deep-water multi-core optical connector with an embedded optical fiber sensor and a control method thereof.

[0033] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0034] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0035] A deepwater multi-core optical connector for implanting an optical fiber sensor comprises a connector body, wherein the connector body comprises a plug portion 1 and a socket portion 2, wherein the plug portion 1 and the socket portion 2 are detachably connected, wherein the plug portion 1 and the socket portion 2 are both covered with a shell 3, wherein the socket portion 2 comprises a rubber sleeve 21, a cable tail clamp 22 arranged in the rubber sleeve 21, and a compression screw sleeve 23 arranged in the cable tail clamp 22, wherein the plug portion 1 comprises a plug screw sleeve 11 and a plug connector 12 arranged in the plug screw sleeve 11, wherein the plug portion 1 and the socket portion 2 are detachably connected via the plug connector 12, and wherein an optical cable is also arranged in the socket portion 2.

[0036] The connector 12 comprises a mounting portion 13 disposed in the plug portion 1 and a plug-in portion 14 connected to the socket portion 2 . A slot 24 is provided between the cable tail clamp 22 and the compression nut 23 , and the size of the slot 24 matches that of the plug-in portion 14 .

[0037] An insulating plate 15 is provided inside the joint screw sleeve, and a plurality of pin assemblies 4 are provided inside the insulating plate 15. The pin assemblies 4 include a pin pressing sleeve 41 and a sealing gasket 42 arranged on the pointer pressing sleeve. A spring 43 is also provided on the pin pressing sleeve 41. A pressure plate 44 is also provided at one end of the joint screw sleeve.

[0038] The rubber sleeve 21 and the cable tail clamp 22 are both provided with a cable channel 25 , and a load-bearing member 26 is provided between the compression screw sleeve 23 and the cable channel 25 .

[0039] Preferably, the compression screw sleeve 23 is provided with a deformation fiber grating sensor and a humidity fiber grating sensor, the pin assembly 4 is also provided with a fiber optic transmission channel 45, and the optical cable is provided with a plurality of optical fibers, each of which is respectively connected to the deformation fiber grating sensor, the humidity fiber grating sensor and the fiber optic transmission channel 45.

[0040] The cable tail clamp 22 is also provided with a plurality of clamping blocks 27 along its length direction. An adjusting screw 28 is provided between each clamping block 27 and the cable tail clamp 22 . The clamping blocks 27 and the cable tail clamp 22 control the diameter of the cable channel 25 through the adjusting screw 28 .

[0041] A sealing ring 5 is further provided at the connection between the plug connector 12 and the socket part 2 . A convex ring 16 is further provided on the outer side of the plug connector 12 . The convex ring 16 abuts against the plug screw sleeve 11 .

[0042] By arranging a plurality of fiber grating sensors in the connector, the above-mentioned fiber grating sensors are configured to detect the working and fixing states of the connector, including but not limited to parameters such as temperature, pressure, deformation, humidity, etc., and the fiber grating sensor is very sensitive to slight changes in physical quantities such as temperature and strain force, and can detect changes in stress and humidity in the connector in a timely and high-precision manner, with high sensitivity and accuracy. At the same time, the overall size of the fiber grating sensor is small, and it can be conveniently installed inside the connector, and can be installed in the stress concentration area inside the connector and the position where humidity needs to be detected according to needs. At the same time, the fiber grating sensor is usually composed of only optical fiber and packaging materials, and will not have a significant impact on the overall quality and performance of the connector after being installed in the connector, and a sealing ring 5 is added at the connection between the plug part 1 and the socket part 2, which improves the sealing performance of the connector in a deep-sea environment, improves the overall service life, and has a good use effect.

[0043] Furthermore, in order to facilitate the overall installation, the connector has a plug part 1 and a socket part 2. The plug part 1 is connected to the socket part 2 through a plug connector 12 arranged therein, and can be fixed to the socket part 2 after the plug connector 12 is inserted, thereby improving the overall stability after the installation is completed. At the same time, an insulating plate 15 is arranged in the joint screw sleeve, and a plurality of pin assemblies 4 are arranged in the insulating plate 15. The pin assemblies 4 include a pin pressing sleeve 41 and a sealing ring 5 arranged on the pointer pressing sleeve. A spring 43 is also arranged on the pin pressing sleeve 41. A pressing plate 44 is also arranged at one end of the joint screw sleeve. The cable is fixed to the cable channel 25 in the cable tail clip 22 through the rubber sleeve 21 and extends to the inside of the compression screw sleeve 23. At the same time, the cable is located in the compression screw sleeve 23 One end of the connector can lead out a number of optical fibers, each of which is connected to the deformation fiber grating sensor, the humidity fiber grating sensor and the optical fiber transmission channel 45, so that the cable can be connected to the information transmission equipment and the detection equipment at the same time, ensuring the compactness of the overall structure of the connector and avoiding excessive changes in the overall structure of the connector after adding the sensor. At the same time, the optical fiber sensor has good chemical stability, high mechanical strength and fatigue resistance, can withstand a certain degree of stretching, bending and vibration, and is not prone to performance degradation and damage during long-term use. It has high reliability and good safety performance. The sensor signal is transmitted through the optical fiber, and the transmission loss of the optical signal in the optical fiber is low, which can realize long-distance signal transmission and is convenient for measurement and monitoring.

[0044] The present application also provides a control method for a deep-water multi-core optical connector implanted with an optical fiber sensor, which, when the detection subject is a deformation optical fiber grating sensor, comprises the following steps: S11, installing the deformation optical fiber grating sensor to the stress concentration part of the connector;

[0045] S12. After the installation is completed, according to the measurement accuracy requirements, select the light source for detection, and adjust the light path between the light source, the optical fiber and the deformation fiber Bragg grating sensor to couple them, and record the wavelength measured by the deformation fiber Bragg grating sensor in the current state as L0;

[0046] S13, during the operation of the connector, the wavelength deformation threshold is set to L1, the wavelength data measured by the deformation fiber Bragg grating sensor is detected, and the wavelength data is processed and analyzed, and the wavelength measured by the current deformation fiber Bragg grating sensor is detected to be L2;

[0047] S14, detecting the state of L2, if L2>L1, it is judged that the current optical fiber deformation is too large, the current water pressure outside the connector is too large, and the staff needs to repair the connector, otherwise, it is judged that the current connector is operating normally;

[0048] When the detection subject is a humidity fiber Bragg grating sensor, the method comprises the following steps: S21, installing the humidity fiber Bragg grating into the compression screw sleeve 23;

[0049] S22, after the installation is completed, the wavelength detected by the current humidity fiber grating sensor in the dry state is L3;

[0050] S23, gradually increasing the ambient humidity, and detecting the ambient wavelength detected by the humidity fiber grating sensor multiple times, to obtain a corresponding relationship between wavelength and humidity;

[0051] S24, after the wavelength change is stabilized, the connector is placed in an undetected working environment for operation;

[0052] S25. During the operation of the connector, the wavelength corresponding to the humidity threshold is set to D1, the wavelength data measured by the humidity fiber grating sensor is detected, and the change in wavelength is converted into the corresponding humidity value D2. If D2>D1, it is judged that the humidity in the current compression screw sleeve 23 is too high, and the staff needs to repair the connector. Otherwise, it is judged that the current connector is operating normally.

[0053] At the same time, during the operation of the connector, since the working environment of the connector is in the deep sea and the water pressure is high, the internal state of the connector needs to be detected in real time during the operation. During the operation of the connector, the connection between the plug-in component 12 and the socket part 2 is a stress concentration part. By setting a deformation fiber Bragg grating sensor there, the deformation of the shell 3 caused by the water pressure can be conveniently detected. The deformation sensor adopts the fiber Bragg grating (FBG) technology. The above technology is based on Bragg diffraction. When a beam of light is irradiated to a fiber Bragg grating with periodic refractive index modulation, the light of a specific wavelength that meets the Bragg condition will be reflected back, and the light of the remaining wavelengths will continue to be transmitted through the grating. The formula of the above Bragg condition is:

[0054] (1)

[0055] in, is the Bragg wavelength, is the effective refractive index of the optical fiber core, It is the grating period. Specifically, when the connection between the connector 12 and the socket part 2 is deformed due to stress, the grating period will lengthen or shorten in response, and the effective refractive index of the optical fiber core will also change, thereby causing a change in the Bragg wavelength and causing the wavelength to shift, so that the staff can determine the strain by the wavelength offset, and can monitor the structural integrity of the connector in real time when used underwater, and promptly discover and prevent potential structural problems.

[0056] Furthermore, in order to prevent liquid from entering during the operation of the connector, a humidity fiber grating sensor is provided in the compression screw sleeve 23. The humidity fiber grating sensor is provided with a humidity-sensitive material. When the humidity in the compression screw sleeve 23 of the humidity-sensitive material increases, it absorbs water and expands, causing the period or effective refractive index of the fiber grating to change, thereby causing the wavelength to shift. The humidity in the current compression screw sleeve 23 is detected based on the wavelength-humidity correspondence relationship obtained according to the ambient wavelength detected by the humidity fiber grating sensor, which facilitates the prediction of the corrosion risk of the connector and the understanding of the product's service life in the current depth environment.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A deep-water multi-core optical connector embedded with an optical fiber sensor, characterized in that: The invention comprises a connector body, wherein the connector body comprises a plug part (1) and a socket part (2), wherein the plug part (1) and the socket part (2) are detachably connected, wherein the plug part (1) and the socket part (2) are both covered with a shell (3), wherein the socket part (2) comprises a rubber sleeve (21), a cable tail clamp (22) arranged in the rubber sleeve (21), and a compression screw sleeve (23) arranged in the cable tail clamp (22), wherein the plug part (1) comprises a plug screw sleeve (11) and a plug connector (12) arranged in the plug screw sleeve (11), wherein the plug part (1) and the socket part (2) are detachably connected via the plug connector (12), and wherein an optical cable is also arranged in the socket part (2).

2. A deep-water multi-core optical connector for implanting an optical fiber sensor according to claim 1, characterized in that: The plug connector (12) comprises a mounting portion (13) arranged in the plug portion (1) and a plug-in portion (14) connected to the socket portion (2); a slot (24) is provided between the cable tail clamp (22) and the compression screw sleeve (23); and the size of the slot (24) matches the size of the plug-in portion (14).

3. A deep-water multi-core optical connector for implanting an optical fiber sensor according to claim 1, characterized in that: An insulating plate (15) is arranged inside the plug screw sleeve (11), a plurality of pin assemblies (4) are arranged inside the insulating plate (15), the pin assemblies (4) include a pin pressing sleeve (41) and a sealing gasket (42) arranged on the pointer pressing sleeve, a spring (43) is also arranged on the pin pressing sleeve (41), and a pressure plate (44) is also arranged at one end of the joint screw sleeve.

4. A deep-water multi-core optical connector for implanting an optical fiber sensor according to claim 1, characterized in that: A cable channel (25) is provided inside the rubber sleeve (21) and the cable tail clamp (22), and a load-bearing member (26) is provided between the compression screw sleeve (23) and the cable channel (25).

5. A deep-water multi-core optical connector for implanting an optical fiber sensor according to claim 3, characterized in that: The compression screw sleeve (23) is provided with a deformation fiber grating sensor and a humidity fiber grating sensor, the pin assembly (4) is also provided with a fiber optic transmission channel (45), and the optical cable is provided with a plurality of optical fibers, each of which is respectively connected to the deformation fiber grating sensor, the humidity fiber grating sensor and the fiber optic transmission channel (45).

6. A deep-water multi-core optical connector for implanting an optical fiber sensor according to claim 1, characterized in that: The cable tail clamp (22) is also provided with a plurality of clamping blocks (27) along its length direction, and an adjusting screw (28) is provided between each of the clamping blocks (27) and the cable tail clamp (22). The clamping blocks (27) and the cable tail clamp (22) control the diameter of the cable channel (25) through the adjusting screw (28).

7. A deep-water multi-core optical connector for implanting an optical fiber sensor according to claim 1, characterized in that: A sealing ring (5) is also provided at the connection between the plug connector (12) and the socket part (2), and a convex ring (16) is also provided on the outside of the plug connector (12), and the convex ring (16) is in contact with the plug screw sleeve (11).

8. A control method for a deep-water multi-core optical connector implanted with an optical fiber sensor according to claim 5, characterized in that: The control method comprises the following steps: When the detection subject is a deformation fiber Bragg grating sensor, the method comprises the following steps: S11, installing the deformation fiber Bragg grating sensor to the stress concentration position of the connector; S12. After the installation is completed, according to the measurement accuracy requirements, select the light source for detection, and adjust the light path between the light source, the optical fiber and the deformation fiber Bragg grating sensor to couple them, and record the wavelength measured by the deformation fiber Bragg grating sensor in the current state as L0; S13, during the operation of the connector, the wavelength deformation threshold is set to L1, the wavelength data measured by the deformation fiber Bragg grating sensor is detected, and the wavelength data is processed and analyzed, and the wavelength measured by the current deformation fiber Bragg grating sensor is detected to be L2; S14, detecting the state of L2, if L2>L1, it is judged that the current optical fiber deformation is too large, the current water pressure outside the connector is too large, and the staff needs to repair the connector, otherwise, it is judged that the current connector is operating normally; When the detection subject is a humidity fiber Bragg grating sensor, the method comprises the following steps: S21, installing the humidity fiber Bragg grating into a compression screw sleeve (23); S22, after the installation is completed, the wavelength detected by the current humidity fiber grating sensor in the dry state is L3; S23, gradually increasing the ambient humidity, and detecting the ambient wavelength detected by the humidity fiber grating sensor multiple times, to obtain a corresponding relationship between wavelength and humidity; S24, after the wavelength change is stabilized, the connector is placed in an undetected working environment for operation; S25. During the operation of the connector, the wavelength corresponding to the humidity threshold is set to D1, the wavelength data measured by the humidity fiber grating sensor is detected, and the change in wavelength is converted into the corresponding humidity value D2. If D2>D1, it is judged that the humidity in the current compression screw sleeve (23) is too high and the staff needs to repair the connector. Otherwise, it is judged that the current connector is operating normally.

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