A Deep-Water Multi-Core Optical Fiber Connector with Embedded Fiber Optic Sensors and Its Control Method

Abstract

The present invention discloses an optical connector integrated with an optical fiber sensor, aiming to provide an optical connector capable of real-time monitoring of the key states of the connector in various environments such as deep sea. By integrating an optical fiber sensor, a deep-water multi-core optical connector implanted with an optical fiber sensor and its control method are provided to solve the problem that traditional optical connectors cannot achieve in-situ monitoring. The key technical points are that a plurality of fiber Bragg grating sensors are provided in the connector. The above-mentioned fiber Bragg 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. Moreover, the fiber Bragg grating sensors are very sensitive to small changes in physical quantities such as temperature and strain force, and can detect the changes in stress and humidity in the connector in a timely and highly accurate manner. The present invention is applicable to the field of deep-sea optical fiber communication.

Description

Technical Field

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

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

[0003] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an optical connector capable of real - time monitoring of key states of the connector in various environments such as deep - sea. By integrating an optical fiber sensor, the problem that traditional optical connectors cannot achieve in - situ monitoring is solved.

[0004] To achieve the above - mentioned purpose, the present invention provides the following technical solution: A deep - water multi - core optical connector implanted with an optical fiber sensor, including a connector body. The connector body includes a plug part and a socket part. The plug part and the socket part are detachably connected. Shells are sleeved outside both the plug part and the socket part. The socket part includes a rubber sleeve, a cable tail clamp arranged in the rubber sleeve, and a compression sleeve arranged in the cable tail clamp. The plug part includes a plug sleeve and a plug - in component arranged in the plug sleeve. The plug part and the socket part are detachably connected through the plug - in component. An optical cable is also arranged in the socket part.

[0005] The present invention is further configured as: The plug - in component has an installation part arranged in the plug part and a plug - in part connected to the socket part. A slot is provided between the cable tail clamp and the compression sleeve, and the size of the slot matches the size of the plug - in part.

[0006] The present invention is further configured as: An insulating board is arranged in the plug sleeve. A plurality of pin assemblies are arranged in the insulating board. The pin assembly includes a pin compression sleeve and a sealing washer arranged on the pointer compression sleeve. A spring is also arranged on the pin compression sleeve. A pressing plate is arranged at one end of the plug sleeve.

[0007] The present invention is further configured such that: cable channels are provided in both the rubber sleeve and the cable tail clip, and a load-bearing member is further provided between the compression sleeve and the cable channel.

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

[0009] The present invention is further configured such that: a plurality of clamping blocks are further provided along the length direction of the cable tail clip, adjusting screws are provided between each of the clamping blocks and the cable tail clip, and the diameter of the cable channel is controlled by the adjusting screws between the clamping blocks and the cable tail clip.

[0010] The present invention is further configured such that: a sealing ring is further provided at the connection between the plug-in member and the socket portion, a convex ring is further provided on the outer side of the plug-in member, and the convex ring abuts against the plug screw sleeve.

[0011] The present application also provides a control method for a deep-water multi-core optical fiber connector implanted with an optical fiber sensor. When the detection body is a deformation fiber Bragg grating sensor, the method includes the following steps: S11. Install the deformation fiber Bragg grating sensor at the stress concentration part of the connector;

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

[0013] During the operation of the connector, set the deformation threshold of the wavelength as L1, detect the wavelength data measured by the deformation fiber Bragg grating sensor, and process and analyze the wavelength data to detect that the wavelength measured by the current deformation fiber Bragg grating sensor is L2;

[0014] Detect the state of L2. If L2 > L1, it is determined that the current optical fiber deformation amount is too large and the external water pressure of the current connector is too large, and the connector needs to be repaired by the staff. Otherwise, it is determined that the current connector is operating normally;

[0015] When the detection body is a humidity fiber Bragg grating sensor, the method includes the following steps: S21. Install the humidity optical fiber grating into the compression sleeve;

[0016] After installation, detect the wavelength L3 detected by the current humidity fiber Bragg grating sensor in the dry state;

[0017] S23. Gradually increase the environmental humidity, and at the same time, detect the environmental wavelength detected by the humidity fiber Bragg grating sensor multiple times to obtain the corresponding relationship between wavelength and humidity;

[0018] S24. After the wavelength change stabilizes, place the connector into the undetected working environment for operation;

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

[0020] By adopting the above technical solutions, the beneficial effects are as follows: 1. By providing multiple fiber Bragg grating sensors in the connector, the above-mentioned fiber Bragg 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. Moreover, the fiber Bragg grating sensor is very sensitive to small changes in physical quantities such as temperature and strain force, can detect the stress and humidity changes 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 Bragg grating sensor is small, which can be conveniently installed inside the connector and can be installed in the stress concentration area inside the connector and the positions where humidity needs to be detected according to requirements. At the same time, the fiber Bragg grating sensor is usually composed of only optical fiber and packaging materials, and will not have an obvious impact on the overall quality and performance of the connector after being installed in the connector. In addition, 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 the deep-sea environment, improves the overall service life, and has good use effects.

[0021] 2. Further, for the convenience of overall installation, the connector has a plug head and a socket part. The plug head is connected to the socket part through a plug-in part arranged inside it and can be fixed to the socket part after the plug-in part is inserted, improving the overall stability after installation. At the same time, an insulating plate is provided inside the plug screw sleeve. Several pin assemblies are provided inside the insulating plate. The pin assembly includes a pin compression sleeve and a sealing ring arranged on the pointer compression sleeve. A spring is also provided on the pin compression sleeve. A pressing plate is also provided at one end of the plug screw sleeve. The cable is fixed to the cable channel in the cable tail clamp through a rubber sleeve and extends into the pressing screw sleeve. At the same time, several optical fibers can be led out from one end of the cable located inside the pressing screw sleeve. Each optical fiber is respectively connected to a deformed fiber Bragg grating sensor, a humidity fiber Bragg grating sensor, and an optical fiber transmission channel, enabling the cable to connect to information transmission equipment and 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 sensors. At the same time, the optical fiber sensor has good chemical stability, high mechanical strength, and anti-fatigue performance, can withstand a certain degree of stretching, bending, and vibration, and is not prone to performance degradation and damage during long-term use, with high reliability and good safety performance. And the signal of the sensor is transmitted through the optical fiber. The optical signal has low transmission loss in the optical fiber and can achieve long-distance signal transmission, facilitating 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 received is large, it is necessary to detect the internal state of the connector in real time during operation. During the operation of the connector, the connection part between the plug-in part and the socket part is the part with stress concentration. By setting a deformed fiber Bragg grating sensor at this place, it is convenient to detect the deformation of the housing caused by the water pressure. The deformation sensor uses fiber Bragg grating (FBG) technology. The above technology is based on Bragg diffraction. When a beam of light irradiates a fiber Bragg grating with periodic refractive index modulation, light with a specific wavelength that satisfies the Bragg condition will be reflected back, and the light with the remaining wavelengths will pass through the grating and continue to transmit. The formula for the above Bragg condition is:

[0023] (1)

[0024] Where, is the Bragg wavelength, is the effective refractive index of the optical fiber core, is the grating period. Specifically, when the connection between the plug-in component and the socket part is deformed under the influence of stress, the grating period will correspondingly elongate or shorten. At the same time, the effective refractive index of the optical fiber core will also change, thereby causing a change in the Bragg wavelength and resulting in a wavelength shift. This enables the staff to determine the magnitude of the strain through the amount of wavelength shift, allowing the staff to monitor the structural integrity of the connector in underwater use in real time and promptly discover and prevent potential structural problems.

[0025] 4. Moreover, in order to prevent liquid from entering during the operation of the connector, a humidity fiber Bragg grating sensor is provided in the compression sleeve. The humidity fiber Bragg grating sensor is provided with a humidity-sensitive material. When the humidity in the compression sleeve increases, the humidity-sensitive material will absorb moisture and expand, resulting in a change in the period or effective refractive index of the fiber Bragg grating, thereby causing a wavelength shift. Based on the environmental wavelength detected by the detected humidity fiber Bragg grating sensor, the corresponding relationship between wavelength and humidity is obtained to detect the current humidity in the compression sleeve, which is convenient for predicting the corrosion risk of the connector and understanding the service life of the product in the current depth environment. Brief Description of the Drawings

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

[0027] Figure 2 is a specific structural schematic diagram of the plug head of an embodiment of a deep-water multi-core optical connector implanted with an optical fiber sensor and its control method according to the present invention;

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

[0029] Figure 4 is a control flow chart of an embodiment of a deep-water multi-core optical connector implanted with an optical fiber sensor and its control method according to the present invention when the detection subject is a deformation fiber Bragg grating sensor;

[0030] Figure 5 is a control flow chart of an embodiment of a deep-water multi-core optical connector implanted with an optical fiber sensor and its control method according to the present invention when the detection subject is a humidity fiber Bragg grating sensor;

[0031] Reference numerals in the drawings: 1, plug head; 11, plug nut; 12, connector; 13, mounting part; 14, plugging part; 15, insulating board; 16, convex ring; 2, socket part; 21, rubber sleeve; 22, cable tail clamp; 23, compression nut; 24, slot; 25, cable channel; 26, load-bearing member; 27, clamping block; 28, adjusting screw; 3, housing; 4, pin assembly; 41, pin compression sleeve; 42, sealing washer; 43, spring; 44, pressing plate; 45, optical fiber transmission channel; 5, sealing ring. Detailed implementation manners

[0032] Refer to Figures 1 to 5 A further description is made on an embodiment of a deep-water multi-core optical connector implanted with an optical fiber sensor and its control method according to the present invention.

[0033] For ease of description, spatial relative terms such as "upper", "lower", "left", "right", etc. are used in the embodiments to describe the relationship between one element or feature shown in the figure and another element or feature. It should be understood that, in addition to the orientations shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" 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] Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0035] A deep-water multi-core optical connector implanted with an optical fiber sensor includes a connector body. The connector body includes a plug head 1 and a socket part 2. The plug head 1 and the socket part 2 are detachably connected. A housing 3 is sleeved outside both the plug head 1 and the socket part 2. The socket part 2 includes a rubber sleeve 21, a cable tail clamp 22 arranged in the rubber sleeve 21, and a compression nut 23 arranged in the cable tail clamp 22. The plug head 1 includes a plug nut 11 and a connector 12 arranged in the plug nut 11. The plug head 1 and the socket part 2 are detachably connected through the connector 12. An optical cable is also arranged in the socket part 2.

[0036] The connector 12 has a mounting part 13 arranged in the plug head 1 and a plugging part 14 connected to the socket part 2. A slot 24 is arranged between the cable tail clamp 22 and the compression nut 23, and the size of the slot 24 matches the size of the plugging part 14.

[0037] An insulating plate 15 is provided inside the plug bushing 11. A plurality of pin assemblies 4 are provided inside the insulating plate 15. The pin assembly 4 includes a pin compression sleeve 41 and a sealing washer 42 provided on the pointer compression sleeve. A spring 43 is further provided on the pin compression sleeve 41. A pressure plate 44 is further provided at one end of the plug bushing 11.

[0038] Cable channels 25 are provided inside both the rubber sleeve 21 and the cable tail clamp 22. A load-bearing member 26 is further provided between the compression sleeve 23 and the cable channel 25.

[0039] Preferably, a deformation fiber Bragg grating sensor and a humidity fiber Bragg grating sensor are provided inside the compression sleeve 23. A fiber optic transmission channel 45 is further provided inside the pin assembly 4. A plurality of optical fibers are provided inside the optical cable. Each of the optical fibers is respectively connected to the deformation fiber Bragg grating sensor, the humidity fiber Bragg grating sensor, and the fiber optic transmission channel 45.

[0040] A plurality of clamping blocks 27 are further provided along the length direction of the cable tail clamp 22. Adjusting screws 28 are provided between each of the clamping blocks 27 and the cable tail clamp 22. The diameter of the cable channel 25 is controlled by the clamping blocks 27 and the cable tail clamp 22 through the adjusting screws 28.

[0041] A sealing ring 5 is further provided at the connection between the plug-in member 12 and the socket portion 2. A convex ring 16 is further provided on the outer side of the plug-in member 12. The convex ring 16 abuts against the plug bushing 11.

[0042] By providing a plurality of fiber Bragg grating sensors inside the connector, the above-mentioned fiber Bragg 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 Bragg grating sensors are very sensitive to small changes in physical quantities such as temperature and strain force, can detect the changes in stress and humidity inside the connector in a timely and high-precision manner, with high sensitivity and accuracy. At the same time, the overall size of the fiber Bragg grating sensors is small, can be conveniently installed inside the connector, and can be installed in the stress concentration area inside the connector and the positions where humidity needs to be detected according to requirements. At the same time, the fiber Bragg grating sensors usually consist only of optical fibers and packaging materials, and will not have an obvious impact on the overall quality and performance of the connector after being installed inside the connector. And by adding the sealing ring 5 at the connection between the plug head 1 and the socket portion 2, the sealing performance of the connector in the deep-sea environment is improved, the overall service life is improved, and the use effect is good.

[0043] Furthermore, for the convenience of overall installation, the connector has a plug head 1 and a socket part 2. The plug head 1 is connected to the socket part 2 through a plug-in part 12 arranged inside it and can be fixed to the socket part 2 after the plug-in part 12 is inserted, improving the overall stability after installation. At the same time, an insulating plate 15 is provided inside the plug nut 11, and several pin assemblies 4 are provided inside the insulating plate 15. The pin assembly 4 includes a pin compression sleeve 41 and a sealing ring 5 arranged on the pointer compression sleeve. A spring 43 is also provided on the pin compression sleeve 41. One end of the plug nut 11 is also provided with a pressing plate 44. The cable is fixed to the cable channel 25 in the cable tail clamp 22 through a rubber sleeve 21 and extends into the pressing nut 23. At the same time, several optical fibers can be led out from one end of the cable located inside the pressing nut 23, and each optical fiber is respectively connected to a deformation fiber Bragg grating sensor, a humidity fiber Bragg grating sensor, and an optical fiber transmission channel 45, enabling the cable to connect information transmission devices and detection devices at the same time, ensuring the compactness of the overall structure of the connector, avoiding excessive changes in the overall structure of the connector after adding sensors. At the same time, the optical fiber sensor has good chemical stability, high mechanical strength, and anti-fatigue performance, can withstand a certain degree of stretching, bending, and vibration, and is not prone to performance degradation and damage during long-term use, with high reliability and good safety performance. And the signal of the sensor is transmitted through the optical fiber, and the optical signal has low transmission loss in the optical fiber, enabling long-distance signal transmission, and facilitating 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. When the detection subject is a deformation fiber Bragg grating sensor, it includes the following steps: S11. Install the deformation fiber Bragg grating sensor at the stress concentration part of the connector;

[0045] After installation, according to the requirements of measurement accuracy, select a light source for detection, and adjust the optical 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] During the operation of the connector, set the deformation threshold of the wavelength as L1, detect the wavelength data measured by the deformation fiber Bragg grating sensor, and process and analyze the wavelength data to detect that the wavelength measured by the current deformation fiber Bragg grating sensor is L2;

[0047] Detect the state of L2. If L2 > L1, it is determined that the current optical fiber deformation is too large and the external water pressure of the current connector is too large, and the staff needs to repair the connector. Otherwise, it is determined that the current connector is operating normally;

[0048] When the detection object is a humidity fiber optic grating sensor, the following steps are included: S21. Install the humidity fiber optic grating into the compression sleeve 23;

[0049] After installation, detect the wavelength L3 detected by the current humidity fiber optic grating sensor in the dry state;

[0050] Gradually increase the ambient humidity, and at the same time, detect the ambient wavelengths detected by the humidity fiber optic grating sensor multiple times to obtain the corresponding relationship between wavelength and humidity;

[0051] After the wavelength change stabilizes, place the connector into the undetected working environment for work;

[0052] During the operation of the connector, set the wavelength corresponding humidity threshold to D1, detect the wavelength data measured by the humidity fiber optic grating sensor, and convert the change amount of the wavelength into the corresponding humidity value D2. If D2 > D1, it is determined that the humidity in the current compression sleeve 23 is too high, and the staff needs to repair the connector. Otherwise, it is determined 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, during the operation, it is necessary to detect the internal state of the connector in real time. During the operation of the connector, the connection part between the plug-in part 12 and the socket part 2 is the part with stress concentration. By setting a deformation fiber optic grating sensor at this place, it is convenient to detect the deformation of the housing 3 caused by the water pressure. The deformation sensor uses fiber Bragg grating (FBG) technology. The above technology is based on Bragg diffraction. When a beam of light irradiates on a fiber Bragg grating with periodic refractive index modulation, the light with a specific wavelength that satisfies the Bragg condition will be reflected back, and the light with the remaining wavelengths will continue to transmit through the grating. The formula for the above Bragg condition is:

[0054] (1)

[0055] Among them, is the Bragg wavelength, is the effective refractive index of the fiber core, is the grating period. Specifically, when the connection part between the plug-in part 12 and the socket part 2 is deformed under the influence of stress, the grating period will correspondingly elongate or shorten, and at the same time, the effective refractive index of the fiber core will also change, thereby causing a change in the Bragg wavelength and resulting in a wavelength shift, enabling the staff to determine the magnitude of the strain through the wavelength shift amount, and enabling the staff to monitor the structural integrity of the connector during underwater use in real time and discover and prevent potential structural problems in time.

[0056] Moreover, in order to prevent liquid from entering during the operation of the connector, a humidity fiber Bragg grating sensor is provided inside the compression sleeve 23. A humidity-sensitive material is provided inside the humidity fiber Bragg grating sensor. When the humidity inside the compression sleeve 23 increases, the humidity-sensitive material will absorb moisture and expand, resulting in a change in the period or effective refractive index of the fiber Bragg grating, thus causing a wavelength shift. According to the detected environmental wavelength of the humidity fiber Bragg grating sensor, the corresponding relationship between wavelength and humidity is obtained to detect the current humidity inside the compression sleeve 23, which is convenient for predicting the corrosion risk of the connector and understanding the service life of the product in the current depth environment.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any ordinary 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 control method for a deep-water multi-core optical connector embedded with an optical fiber sensor, characterized in that: 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, the plug part (1) and the socket part (2) are both covered with a shell (3), 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), the plug part (1) comprises a plug screw sleeve (11) and a plug connector (12) arranged in the plug screw sleeve (11), the plug part (1) and the socket part (2) are detachably connected via the plug connector (12), and an optical cable is also arranged in the socket part (2); The control method of the deep-water multi-core optical connector implanted with an optical fiber sensor 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.

2. The control method of a deep-water multi-core optical connector embedded with 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. The control method of a deep-water multi-core optical connector embedded with 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 plug screw sleeve (11).

4. The control method of a deep-water multi-core optical connector implanted with 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. The control method of a deep-water multi-core optical connector embedded with 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. The control method of a deep-water multi-core optical connector embedded with 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. The control method of a deep-water multi-core optical connector embedded with 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).

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