A fiber stripping device for self-monitoring FRP rods of optical fibers

Abstract

The present invention discloses a fiber stripping device for a fiber optic self-monitoring FRP rod, belonging to the field of intelligent structural materials, aiming to solve the problem that it is difficult to quickly strip the optical fiber of the existing thermoplastic tight-sheath fiber optic self-monitoring FRP rod under complex engineering conditions. It includes a heating module, a circumferential cutting and bending module, and a temperature control power supply module. The fiber optic self-monitoring FRP rod is inserted into the heating module from the tail end and passes through the circumferential cutting and bending module. The heating module heats the fiber optic self-monitoring FRP rod, and then the circumferential cutting and bending module circumferentially cuts and breaks the FRP layer to strip the FRP layer. The heating module enables the thermoplastic tight-sheath layer to reach the melting temperature, thereby realizing the extraction and stripping of the optical fiber from the thermoplastic tight-sheath layer. This device has fast operation, realizes the circumferential cutting, bending, and fiber extraction and stripping of the fiber optic self-monitoring FRP rod while heating, and shortens the operation time.

Description

Technical Field

[0001] The invention belongs to the field of intelligent structural materials, and particularly relates to a fiber stripping device for a fiber optic self-monitoring FRP rod. Background Art

[0002] When a fiber optic sensor and a fiber reinforced composite material (FRP) are pultruded together to form a fiber optic self-monitoring FRP rod, the fiber optic sensor inside the fragile FRP can be effectively protected, and the durability of the fiber optic sensor can be greatly improved. At the same time, the formed fiber optic self-monitoring FRP rod can be directly used as a high-strength sensor, and can monitor the environment and the damage of the FRP layer itself while serving as a structural stress member, and can be used in civil engineering applications such as bridge cables, concrete structures, ground anchor structures, and ocean engineering. The prior art discloses a fiber optic self-monitoring FRP rod (China Publication No.: CN116295547A), which includes a bare fiber optic, a thermoplastic tight jacket layer, and an FRP layer. The outer layer of the bare fiber optic is coated with a thermoplastic tight jacket layer, and the outer layer of the thermoplastic tight jacket layer is coated with an FRP layer. The fiber optic self-monitoring FRP rod is prepared by extruding a thermoplastic layer tightly on the outer surface of the fiber optic sensor. When the fiber optic self-monitoring FRP rod is in use for monitoring, the fiber optic needs to be stripped from the FRP rod for connecting a fiber optic demodulation device. First, the outer FRP layer needs to be cut and broken in a circular shape, and the stripping section needs to be heated to soften the internal thermoplastic tight jacket layer, and finally the fiber optic is stripped. However, at present, for this kind of fiber optic self-monitoring FRP rod, there is a lack of a device that can effectively and quickly cut, bend, and strip the stripping section, especially suitable for operations in complex environmental conditions such as narrow and high-altitude areas. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a fiber stripping device for a fiber optic self-monitoring FRP rod to solve the problem that it is difficult to quickly strip the fiber optic from the existing fiber optic self-monitoring FRP rod under complex engineering conditions.

[0004] The technical solution adopted by the present invention is as follows: A fiber stripping device for a fiber optic self-monitoring FRP rod, comprising: a heating module, a cutting and bending module, and a temperature control power supply module. A high-temperature thermocouple is installed in the heating module. The temperature control power supply module is electrically connected to the heating module for power supply and heating. The high-temperature thermocouple is electrically connected to the temperature control power supply module to feedback the heating temperature, and the temperature control power supply module simultaneously controls the internal temperature of the heating module. The front end of the heating module is connected to the cutting and bending module. When in use, the fiber optic self-monitoring FRP rod is inserted into the heating module from the tail end and passes through the cutting and bending module. The heating module heats the fiber optic self-monitoring FRP rod, and then the cutting and bending module cuts and breaks the FRP layer that needs to be stripped. The heating module makes the thermoplastic tight jacket layer reach the melting temperature, and then the fiber optic is pulled out and stripped from the thermoplastic tight jacket layer.

[0005] Further, for the fiber stripping device as described above, the heating module thereof includes multiple heating rods, a soaking cylinder, a high-temperature thermocouple, a heat-insulating sheath, and multiple groups of fixing knobs. A through hole for the fiber self-monitoring FRP rod to insert is opened in the center of the soaking cylinder. A plurality of axial heating holes are evenly opened along the circumferential end face at the tail of the soaking cylinder. The heating rods are evenly inserted into the axial heating holes. The heat-insulating sheath is wrapped around the outer wall of the soaking cylinder. The high-temperature thermocouple passes through the heat-insulating sheath and the soaking cylinder in sequence to monitor the temperature inside the soaking cylinder and feed it back to the temperature control power supply module. Multiple groups of fixing knobs pass through the heat-insulating sheath and the soaking cylinder in sequence and are threadedly connected to the side wall of the soaking cylinder to fix the fiber self-monitoring FRP rod inside the soaking cylinder.

[0006] Further, for the fiber stripping device as described above, it further includes a heat-insulating handle. The heat-insulating handle passes through the heat-insulating sheath and is fixed on the soaking cylinder, and the outer layer of the handle is wrapped with heat-insulating material.

[0007] Further, for the fiber stripping device as described above, the length of the heating rod is the same as the length of the soaking cylinder.

[0008] Further, for the fiber stripping device as described above, the circumferential cutting and bending module includes a circumferential cutting blade, a blade sheath, a sheath track, a shaft rod knob, a blade anvil ring, a circumferential cutting bearing, and an FRP layer breaking cone cylinder. The circumferential cutting blade is fixed on the blade sheath through a central shaft. One end outer wall of the blade sheath is a multi-ridged slide rail protruding vertically and is slidably connected in cooperation with the groove in the sheath track. A vertical threaded through hole is opened on the upper plane at one end of the blade sheath. The track shaft rod passes through the threaded through hole and is threadedly connected to the blade sheath. The upper end of the track shaft rod is fixedly connected to the shaft rod knob. The outer wall surface of the blade anvil ring is fixedly connected to the lower section of the side wall of the sheath track. A radial notch is opened on the upper wall surface in the middle section of the blade anvil ring for the circumferential cutting blade to extend into and cut the FRP layer. One side of the annular plane of the blade anvil ring is fixedly connected to the FRP layer breaking cone cylinder, and the other side is rotatably connected to the soaking cylinder through a circumferential cutting bearing. The inner hole diameter of the blade anvil ring should be larger than the diameter of the fiber self-monitoring FRP rod. By rotating the shaft rod knob, the circumferential cutting blade makes a quantitative upward or downward movement in the vertical direction along the sheath track, so that the circumferential cutting blade circumferentially cuts the FRP layer. A taper through hole with an angle less than 45° is opened in the center of the FRP layer breaking cone cylinder for the fiber self-monitoring FRP rod after circumferential cutting to be repeatedly bent at a small angle in the front, back, left, and right four directions perpendicular to the rod axis and prevent the optical fiber from being broken due to excessive bending.

[0009] Further, the present invention also provides a method for quickly stripping the optical fiber of a fiber self-monitoring FRP rod. Using the fiber stripping device as described above, the method includes the following steps:

[0010] S1. Device preheating: Set the temperature control power module to the melting point temperature of the thermoplastic tight jacket layer material and wait until the internal temperature of the soaking cylinder is monitored by the high-temperature thermocouple and stabilized at this temperature;

[0011] S2. Rod fixing: Insert the optical fiber with the required stripping length into the through hole of the soaking cylinder from the monitored FRP rod for heating, and use the tightening fixing knob to clamp and fix the optical fiber from the monitored FRP rod;

[0012] S3. Rod circumferential cutting: While heating, rotate the shaft rod knob to make the circumferential cutting blade contact the surface of the optical fiber self-monitoring FRP rod; then alternately rotate the shaft rod knob and the circumferential bearing to realize the pressure of the blade on the surface of the optical fiber self-monitoring FRP rod and the circumferential cutting of the FRP layer;

[0013] S4. Rod bending: While heating, bend the circumferentially cut optical fiber self-monitoring FRP rod along the taper of the broken cone of the FRP layer and repeatedly bend it in the four directions of front, back, left, and right perpendicular to the rod axis until the FRP layer is fully broken while the inner optical fiber remains connected;

[0014] S5. Optical fiber stripping: After the heating time reaches the full melting of the thermoplastic tight jacket layer, pull out the optical fiber from the stripping section of the thermoplastic tight jacket layer to achieve thermal stripping of the optical fiber.

[0015] Compared with the existing operation method of the optical fiber self-monitoring FRP rod with a thermoplastic tight jacket layer, the beneficial effects of the present invention are:

[0016] 1. Stable and controllable heating temperature: Through the controllable temperature heating of the heating rod, high-temperature thermocouple and temperature control power supply and the uniform heat transfer of the soaking cylinder, a controllable constant-temperature high-temperature environment is created in the soaking cylinder, and the heating temperature can be adjusted according to the melting point of the material of the optical fiber thermoplastic tight jacket layer to prevent the tight jacket layer from decomposing due to too high temperature or not melting due to too low temperature.

[0017] 2. Controllable circumferential cutting depth: Through the circumferential cutting blade, blade anvil ring, sheath track and other structures in the circumferential cutting device, the pre-pressure application and cutting depth control of the blade on the FRP layer are realized; the circumferential controllable cutting of the FRP layer is realized by rotating the circumferential cutting bearing; the above can prevent the situation that the FRP layer is difficult to break due to improper cutting method or the optical fiber is directly cut and broken.

[0018] 3. Small bending angle. The bending angle of the rod after circumferential cutting is controlled by the broken cone to prevent the internal optical fiber of the rod from being broken due to the bending angle.

[0019] 4. The device is heat-insulating and heat-preserving. The heat-insulating sheath and heat-insulating handle prevent the operator's skin from directly contacting the soaking cylinder and prevent scalding accidents; through the soaking and heat-insulating sheath, the soaking heating is realized while the heat consumption is blocked, saving energy consumption.

[0020] 5. The device is quick and easy to operate, enabling the simultaneous completion of circumferential cutting, bending, and fiber extraction and stripping of the FRP rod during heating, thus shortening the operation time. The device is applicable to complex working conditions such as narrow and high-altitude environments where the overall movement of the fiber stripping device is required. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a fiber stripping device for a fiber self-monitoring FRP rod according to the present invention;

[0022] Figure 2 It is an internal schematic diagram of the heating module of a fiber stripping device for a fiber self-monitoring FRP rod according to the present invention;

[0023] Figure 3 It is an external schematic diagram of the heating module of a fiber stripping device for a fiber self-monitoring FRP rod according to the present invention;

[0024] Figure 4 It is a side schematic view of the circumferential cutting and bending module of a fiber stripping device for a fiber self-monitoring FRP rod according to the present invention Figure 1 ;

[0025] Figure 5 It is a schematic diagram of the internal structure of the circumferential cutting and bending module of a fiber stripping device for a fiber self-monitoring FRP rod according to the present invention Figure 1 ;

[0026] Figure 6 It is a side schematic view of the circumferential cutting and bending module of a fiber stripping device for a fiber self-monitoring FRP rod according to the present invention Figure 2 ;

[0027] Figure 7 It is a schematic diagram of the internal structure of the circumferential cutting and bending module of a fiber stripping device for a fiber self-monitoring FRP rod according to the present invention Figure 2 ;

[0028] Figure 8 It is a flowchart of the operation method of a fiber stripping device for a fiber self-monitoring FRP rod according to the present invention. Detailed Embodiments

[0029] In order to make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and specific practical cases. The implementation cases here are used to explain the present invention but do not limit the present invention.

[0030] Embodiment 1

[0031] As Figure 1-7As shown in the figure, a fiber stripping device for fiber optic self-monitoring FRP rods includes: a heating module 1, a circumferential cutting and bending module 2, and a temperature control power supply module 3. A high-temperature thermocouple 103 is installed inside the heating module 1. The temperature control power supply module 3 is electrically connected to the heating module 1 for power supply and heating. The high-temperature thermocouple 103 is electrically connected to the temperature control power supply module 3 to feedback the heating temperature. The temperature control power supply module 3 simultaneously controls the internal temperature of the heating module 1. The front end of the heating module 1 is connected to the circumferential cutting and bending module 2. During use, the fiber optic self-monitoring FRP rod is inserted into the heating module 1 from the tail end and passes through the circumferential cutting and bending module 2. The heating module 1 heats the fiber optic self-monitoring FRP rod, and then the circumferential cutting and bending module 2 circumferentially cuts and breaks the FRP layer to be peeled off. The heating module 1 makes the thermoplastic tight sleeve layer reach the melting temperature, thereby realizing the extraction and peeling of the fiber from the thermoplastic tight sleeve layer.

[0032] As Figure 2-3 shown, the heating module 1 includes multiple heating rods 101, a heat equalizing cylinder 102, a high-temperature thermocouple 103, a heat preservation sheath 104, and multiple groups of fixing knobs 105. A through hole for inserting the fiber optic self-monitoring FRP rod is opened in the center of the heat equalizing cylinder 102. Multiple axial heating holes are evenly opened along the circumferential end face at the tail of the heat equalizing cylinder 102. The heating rods 101 are evenly inserted into the axial heating holes. The heat preservation sheath 104 is wrapped around the outer wall of the heat equalizing cylinder 102. The inside of the heat preservation sheath 104 is filled with heat preservation materials such as asbestos, etc., to realize heat preservation of the internal heat equalizing cylinder and prevent skin contact burns at the same time. The high-temperature thermocouple 103 sequentially passes through the heat preservation sheath 104 and the heat equalizing cylinder 102 to monitor the internal temperature of the heat equalizing cylinder 102 and feedback it to the temperature control power supply module 3. Multiple groups of fixing knobs 105 sequentially pass through the heat preservation sheath 104 and the heat equalizing cylinder 102 and are threadedly connected to the side wall of the heat equalizing cylinder 102 to fix the fiber optic self-monitoring FRP rod inside the heat equalizing cylinder 102. And it also includes a heat insulation handle 106. The heat insulation handle 106 passes through the heat preservation sheath 104 and is fixed on the heat equalizing cylinder 102. The outer layer of the handle is wrapped with heat insulation materials, which is used to manually control the whole device to realize fiber thermal stripping of rods at complex positions and prevent skin contact burns at the same time. The length of the heating rod 101 is the same as the length of the heat equalizing cylinder 102.

[0033] As Figure 4-7As shown in the figure, the circumferential cutting and bending module 2 includes a circumferential cutting blade 201, a blade sheath 202, a sheath track 203, a shaft rod knob 205, a blade anvil ring 206, a circumferential cutting bearing 207, and an FRP layer breaking cone 208. The circumferential cutting blade 201 is fixed on the blade sheath 202 through a central shaft. One end outer wall of the blade sheath 202 is a vertically protruding multi-ridged sliding rail that is slidably connected to the groove in the sheath track 203. A vertical threaded through hole is opened on the upper plane at one end of the blade sheath 202. The track shaft rod 204 passes through the threaded through hole and is threadedly connected to the blade sheath 202. The upper end of the track shaft rod 204 is fixedly connected to the shaft rod knob 205. The outer wall surface of the blade anvil ring 206 is fixedly connected to the lower section of the side wall of the sheath track 203. A radial notch is opened on the upper wall surface in the middle section of the blade anvil ring 206 for the circumferential cutting blade 201 to extend into and cut the FRP layer. One side of the annular plane of the blade anvil ring 206 is fixedly connected to the FRP layer breaking cone 208, and the other side is rotatably connected to the soaking cylinder 102 through the circumferential cutting bearing 207. The inner hole diameter of the blade anvil ring 206 should be larger than the diameter of the fiber self-monitoring FRP rod. By rotating the shaft rod knob 205, the circumferential cutting blade 201 makes a quantitative upward or downward movement in the vertical direction along the sheath track 203, so that the circumferential cutting blade 201 circumferentially cuts the FRP layer. A taper through hole with an angle less than 45° is opened in the center of the FRP layer breaking cone 208, which is used for the small-angle repeated bending of the fiber self-monitoring FRP rod in the four directions of front, back, left, and right perpendicular to the rod axis after circumferential cutting, and prevents the fiber from breaking due to excessive bending.

[0034] Embodiment 2

[0035] This embodiment discloses a method for quickly peeling the optical fiber of a fiber self-monitoring FRP rod. Using the peeling device described in Embodiment 1, the method includes the following steps:

[0036] S1. Device preheating: Set the temperature control power supply module 3 to the melting point temperature of the thermoplastic tight sleeve layer material, and wait for the high-temperature thermocouple 103 to monitor that the internal temperature of the soaking cylinder 102 is stable at this temperature;

[0037] S2. Rod body fixing: Insert the fiber self-monitoring FRP rod with the required peeling length into the through hole of the soaking cylinder 102 for heating, and use the tightening fixing knob 105 to clamp and fix the fiber self-monitoring FRP rod;

[0038] S3. Rod body circumferential cutting: While heating, rotate the shaft rod knob 205 to make the circumferential cutting blade 201 contact the surface of the fiber self-monitoring FRP rod; then alternately rotate the shaft rod knob 205 and the circumferential bearing to apply pressure to the surface of the fiber self-monitoring FRP rod by the blade and circumferentially cut the FRP layer;

[0039] S4. Rod body bending: While heating, repeatedly bend the circumferentially cut optical fiber along the taper of the break cone 208 of the self-monitoring FRP rod and in the four directions of front, back, left, and right perpendicular to the rod axis until the FRP layer is fully broken while the inner optical fiber remains connected.

[0040] S5. Optical fiber stripping: After the heating time reaches when the thermoplastic tight jacket layer is fully melted, pull out the optical fiber from the stripping section of the thermoplastic tight jacket layer to achieve thermal stripping of the optical fiber.

[0041] Example 3

[0042] Now, it is necessary to perform 200 mm length thermal stripping on a self-monitoring CFRP rod with a thermoplastic tight jacket optical fiber made of polypropylene (melting point 200 °C) with a diameter of 5 mm. The operation steps are as follows:

[0043] S1. Device preheating: Set the temperature control power module to 200 °C and wait for the high-temperature thermocouple to monitor that the temperature inside the soaking cylinder is stable at 200 °C.

[0044] S2. Rod body fixation: Insert the end of the 200 mm long self-monitoring CFRP rod into the through-hole of the soaking cylinder for heating. The diameter of the through-hole is 6 mm, and tighten the fixing knob to clamp and fix the CFRP rod.

[0045] S3. Rod body circumferential cutting: While heating, tighten the shaft rod knob to make the rod move towards the blade so that the blade contacts the surface of the FRP rod; then alternately rotate the shaft rod knob and the circumferential bearing to apply pressure and circumferentially cut the surface of the FRP rod with the blade, so that the remaining rod body diameter of the self-monitoring FRP rod after circumferential cutting is about 2 mm.

[0046] S4. Rod body bending: While heating, bend the circumferentially cut rod along the 20° taper of the break cone and in the four directions of front, back, left, and right perpendicular to the rod axis with small angles repeatedly until the FRP layer of the rod is fully broken while the inner optical fiber remains connected.

[0047] S5. Optical fiber stripping: After the heating time reaches 15 seconds and the thermoplastic tight jacket layer of the optical fiber is fully softened, pull out the optical fiber from the stripping section of the FRP rod to achieve thermal stripping of the optical fiber.

[0048] Example 4

[0049] Now, it is necessary to perform 250 mm length thermal stripping on a self-monitoring GFRP rib with a thermoplastic tight jacket optical fiber made of urethane (melting point 180 °C) with a diameter of 10 mm. The operation steps are as follows:

[0050] S1. Device preheating: Set the temperature control power module to 180 °C and wait for the high-temperature thermocouple to monitor that the temperature inside the soaking cylinder is stable at 180 °C.

[0051] S2. Fix the tendon body. Insert the end of the self-monitoring GFRP tendon with a length of 250 mm into the through-hole of the soaking cylinder for heating. The diameter of the through-hole is 12 mm, and tighten the fixing knob to clamp and fix the GFRP tendon.

[0052] S3. Circumferentially cut the tendon body. While heating, tighten the shaft tendon knob to make the tendon face the blade, so that the blade contacts the surface of the FRP tendon; then alternately rotate the shaft tendon knob and the circumferential bearing to apply pressure and circumferentially cut the surface of the FRP tendon, so that the diameter of the remaining tendon body of the self-monitoring FRP tendon after circumferential cutting is about 3 mm.

[0053] S4. Bend the tendon body. While heating, bend the circumferentially cut tendon along the 20° taper of the fracture cone cylinder in four directions, namely front, back, left, and right, perpendicular to the axis of the tendon, with small angles repeatedly until the FRP layer of the tendon is fully fractured while the inner optical fiber remains connected.

[0054] S5. Strip the optical fiber. After the heating time reaches 20 s and the thermoplastic tight jacket layer of the optical fiber is fully softened, pull out the optical fiber from the stripped section of the FRP tendon to achieve thermal stripping of the optical fiber.

Claims

1. A fiber stripping device for self-monitoring FRP rods of optical fibers, comprising: A heating module (1), a circumferential cutting and bending module (2) and a temperature control power supply module (3), characterized in that a high-temperature thermocouple (103) is installed in the heating module (1), the temperature control power supply module (3) is electrically connected to the heating module (1) for power supply and heating, the high-temperature thermocouple (103) is electrically connected to the temperature control power supply module (3) to feedback the heating temperature, and the temperature control power supply module (3) simultaneously controls the internal temperature of the heating module (1); the front end of the heating module (1) is connected to the circumferential cutting and bending module (2); the heating module (1) includes a plurality of heating rods (101), a heat equalizing cylinder (102), a high-temperature thermocouple (103), a heat preservation sheath (104) and a plurality of groups of fixing knobs (105), a through hole for the insertion of the fiber self-monitoring FRP rod is opened in the center of the heat equalizing cylinder (102), a plurality of axial heating holes are uniformly opened along the circumferential end face at the tail of the heat equalizing cylinder (102), the heating rods (101) are uniformly inserted into the axial heating holes, and the heat preservation sheath (104) is wrapped around the outer wall of the heat equalizing cylinder (102); the high-temperature thermocouple (103) sequentially passes through the heat preservation sheath (104) and the heat equalizing cylinder (102) to monitor the internal temperature of the heat equalizing cylinder (102) and feedback it to the temperature control power supply module (3); the length of the heating rod (101) is the same as the length of the heat equalizing cylinder (102); the circumferential cutting and bending module (2) includes a circumferential cutting blade (201), a blade sheath (202), a sheath track (203), a shaft rod knob (205), a blade anvil ring (206), a circumferential cutting bearing (207) and an FRP layer breaking cone (208), the circumferential cutting blade (201) is fixed on the blade sheath (202) through a central shaft, one end outer wall of the blade sheath (202) is a multi-ridge slide rail protruding vertically and is slidably connected with a groove in the sheath track (203), a vertical threaded through hole is opened on the upper plane at one end of the blade sheath (202), the track shaft rod (204) passes through the threaded through hole and is threadedly connected with the blade sheath (202), the upper end of the track shaft rod (204) is fixedly connected with the shaft rod knob (205), the outer wall surface of the blade anvil ring (206) is fixedly connected with the lower section of the side wall of the sheath track (203), a radial notch is opened on the upper wall surface in the middle of the blade anvil ring (206) for the circumferential cutting blade (201) to extend into and cut the FRP layer, one side of the annular plane of the blade anvil ring (206) is fixedly connected with the FRP layer breaking cone (208), and the other side is rotatably connected with the heat equalizing cylinder (102) through a circumferential cutting bearing (207), the inner hole diameter of the blade anvil ring (206) should be larger than the diameter of the fiber self-monitoring FRP rod, and the circumferential cutting blade (201) is realized to make a quantitative upward or downward movement in the vertical direction along the sheath track (203) by rotating the shaft rod knob (205).

2. The fiber stripping device for fiber optic self-monitoring FRP rod according to claim 1, characterized in that: It further includes a heat-insulating handle (106). The heat-insulating handle (106) passes through the heat-insulating sheath (104) and is fixed on the soaking cylinder (102), and the outer layer of the handle is wrapped with heat-insulating material.

3. A method for quickly peeling optical fibers of an optical fiber self-monitoring FRP rod, using the optical fiber peeling device as described in claim 1 or 2. The method includes the following steps: S1. Device preheating: Set the temperature control power supply module (3) to the melting point temperature of the thermoplastic tight jacket layer material, and wait for the high-temperature thermocouple (103) to monitor that the internal temperature of the soaking cylinder (102) is stable at this temperature; S2. Rod fixing: Insert the optical fiber self-monitoring FRP rod with the required peeling length into the through hole of the soaking cylinder (102) for heating, and use the tightening fixing knob (105) to clamp and fix the optical fiber self-monitoring FRP rod; S3. Rod circumferential cutting: While heating, rotate the shaft rod knob (205) to make the circumferential cutting blade (201) contact the surface of the optical fiber self-monitoring FRP rod; then alternately rotate the shaft rod knob (205) and the circumferential bearing to apply pressure to the surface of the optical fiber self-monitoring FRP rod by the blade and circumferentially cut the FRP layer; S4. Rod bending: While heating, bend the circumferentially cut optical fiber self-monitoring FRP rod along the taper of the FRP layer breaking cone (208) and in the front, back, left, and right directions perpendicular to the rod axis repeatedly until the FRP layer is fully broken while the inner optical fiber remains connected; S5. Optical fiber peeling: After the heating time reaches the full melting of the thermoplastic tight jacket layer, pull out the optical fiber from the peeling section of the thermoplastic tight jacket layer to achieve thermal peeling of the optical fiber.

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