CN116020769A - Composite optical fiber defect detection device and method - Google Patents

Abstract

The invention belongs to the technical field of optical fiber detection, and in particular relates to a composite optical fiber defect detection device and method. The composite optical fiber defect detection device includes: a light source module, an optical fiber rewinding module, an optical fiber cleaning module, a laser diameter measurement module, a defect detection module, a light leakage detection module, and a data analysis module; the device and method integrate optical fiber surface defect detection imaging, The three main functions of optical fiber wire diameter consistency detection and optical fiber light leakage defect detection are to realize the compound function detection and identification of defects such as cracks, damages and abnormal wire diameters on the surface of optical fiber coating layer.

Description

A composite optical fiber defect detection device and method

technical field

The invention belongs to the technical field of optical fiber detection, and in particular relates to a composite optical fiber defect detection device and method.

Background technique

At present, in the field of domestic optical fiber industry, the detection method of optical fiber is mainly based on static sampling detection. For example, using an optical fiber screening machine for detection, continuous measurement of the length of the optical fiber under test cannot be realized. In the process of surface defect detection of optical fiber, it cannot reflect the details of the change of optical fiber along the length direction, and there is a hidden danger of ignoring defect points or abnormal points. It cannot be effectively screened for the preparation of high-demand optical fiber products. In addition, the current optical fiber defect means cannot realize the simultaneous detection of wire diameter measurement, surface defect imaging and light leakage detection in one detection process, and there is still a great potential for functional improvement.

Contents of the invention

(1) Technical problems to be solved

The technical problem to be solved by the present invention is: in order to overcome the above shortcomings, how to break through the technical bottleneck of optical fiber defect detection, how to provide a composite optical fiber defect detection device and method, integrated optical fiber surface defect detection imaging, optical fiber diameter consistency detection and Optical fiber light leakage defect detection has three main functions to realize the compound function detection and identification of defects such as surface cracks, damage and abnormal wire diameter of optical fiber coating layer.

(2) Technical solutions

In order to solve the above technical problems, the present invention provides a composite optical fiber defect detection device, which includes: a light source module, an optical fiber rewinding module, an optical fiber cleaning module, a laser caliper module, a defect detection module, and a light leakage module. Detection module, data analysis module;

The light source module is used to inject multimode red light into the optical fiber under test;

The optical fiber rewinding module is used to control the travel of the optical fiber under test;

The optical fiber cleaning module is used to realize the function of removing dust and static electricity on the surface of the optical fiber under test, and reduce the misjudgment of optical fiber surface defect imaging detection;

The laser diameter measurement module is used to realize the continuous measurement function of the bidirectional diameter of the optical fiber under test;

The defect detection module is used for imaging and defect recording of the optical fiber under test;

The light leakage detection module uses a red light LD laser as a light source for collecting and identifying defects at light leakage using visual inspection technology;

The data analysis module is used for analyzing and processing the surface image of the optical fiber, and performing display and alarm.

Wherein, the composite optical fiber defect detection device also includes a system control module;

The system control module adopts a programmable logic controller (PLC), a human-computer interaction interface (touch screen) and an AC servo control system to realize the human-computer interaction function.

Wherein, the light source module is a red light source.

Wherein, the optical fiber rewinding module is realized by an optical fiber rewinding machine.

Wherein, the optical fiber cleaning module includes a dust removal component and a static removal component.

Wherein, the static electricity removal component is composed of an ion air bar, an ion air gun, and an ion fan.

Wherein, the laser caliper module is realized by a laser caliper.

Wherein, the defect detection module is realized by using a visible light illumination source and a high-speed CCD camera.

Among them, the defect detection module uses a high-speed CCD camera to realize the optical imaging of the optical fiber; the imaging system adopts a double-doublet lens design with a double symmetrical structure, corrects the optical phase difference, and uses the same optical structure for surface defect detection and light leakage detection. The distance and image distance are the same, and the working distance is the same, which is convenient for system debugging; because the optical fiber under test needs to be imaged rapidly and continuously, the illumination of the imaging fiber area must be uniform and stable, otherwise there will be different imaging results; for the transparent characteristics of the bare optical fiber itself , using high-power LED backlighting, in order to obtain a uniform lighting effect, a uniform light plate is inserted between the LED and the optical fiber to be tested; for the opaque characteristics of the reinforced optical fiber itself, a symmetrical side lighting method is used, the two are the same The light source is placed symmetrically, and the two groups of light sources are superimposed to obtain uniform illuminance in the imaging field of view;

In addition, the present invention also provides a composite optical fiber defect detection method, the composite optical fiber defect detection method is implemented based on the composite optical fiber defect detection device, and the method includes the following steps:

Step 1: The fiber to be tested travels at a certain speed driven by the fiber rewinding module, and detects the travel speed information of the fiber to be tested;

Step 2: The optical fiber to be tested first passes through the optical fiber cleaning module to remove dust and static electricity on the surface to reduce false alarms in defect detection; when the optical fiber is rewound, the antistatic component of the optical fiber cleaning module continuously blows ionized positive and negative ions to the tested Optical fiber, eliminate the static electricity generated when the optical fiber under test is rewound at high speed, and blow away the attached particles; the dust removal component of the optical fiber cleaning module performs dust suction treatment after the optical fiber passes through the static removal device to reduce the dust attached to the surface of the optical fiber, and then Pass through the sponge assembly, inject alcohol into the sponge, and wipe the dust on the surface of the optical fiber with the sponge;

Step 3: The optical fiber to be tested passes through the laser diameter measurement module, and the laser diameter measurement module quickly collects the fiber diameter data, and quickly compares it with the preset fiber diameter threshold, and records the abnormal data whose diameter exceeds the threshold;

Step 4: The optical fiber to be tested passes through the surface defect detection module to perform imaging and defect recording of the optical fiber under test;

Step 5: The optical fiber to be tested passes through the light leakage detection module. The light leakage detection module uses an LD laser outputting red light as a light source to inject red light into the optical fiber to be tested. When there is a defect or damage on the surface of the optical fiber, the red light will flow Leakage at defect points, using visual technology to collect and identify defects at light leaks;

Step 6: The data processing module adopts different defect detection strategies for bare optical fibers and reinforced optical fibers;

The processing flow of the bare fiber is: ①The length of the detection is regularly read from the programmable logic controller and combined with the time stamp and sent to the data processing module for storage; ②The picture read from the camera is sent to the algorithm processing module to cut the fiber area, and Process whether there is an exception, send the abnormal data to the data processing module, and the data processing module matches the distance value according to the time stamp and sends it to the abnormal recording module for recording; ③ regularly read the abnormal data recorded in the laser caliper, and record the abnormal data The data is sent to the data processing module, and the data processing module matches the distance value according to the timestamp and sends it to the abnormal recording module for recording;

The processing flow of the enhanced optical fiber is as follows: ①The combination of the detection length and the time stamp is regularly read from the programmable logic controller, and sent to the data processing module for storage; The photo is directly sent to the data processing module to match the distance value, and sent to the abnormal record data module; ③ regularly read the abnormal data in the laser caliper record, and send it to the data processing module, the data processing module matches the distance value according to the time stamp and Send to the exception recording module for recording.

(3) Beneficial effects

In order to overcome the above shortcomings and break through the technical bottleneck of optical fiber defect detection, the present invention provides a composite optical fiber defect detection device and method, which integrates three main functions of optical fiber surface defect detection imaging, optical fiber line diameter consistency detection and optical fiber light leakage defect detection. Realize the compound functional detection and identification of defects such as cracks, damages and abnormal wire diameters on the surface of the optical fiber coating layer.

The composite optical fiber defect detection device and method can focus on the performance consistency of the entire long-distance optical fiber, on the one hand to ensure the stability of optical fiber quality, and on the other hand to provide parameter input and data reference for the preparation of optical fiber products.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The composite optical fiber defect detection device and method adopts a visible light source to provide side lighting for the optical fiber under test, uses a high-speed CCD camera to realize optical imaging of the optical fiber, and performs data processing by matching abnormal data with time stamp data , to complete the detection of surface defects, so the device has the function of high-speed acquisition of optical fiber surface images, and can identify optical fiber surface defects;

(2) The composite optical fiber defect detection device and method adopts a semiconductor laser as a light source, and realizes a red laser output with a power greater than 1W through the circuit adjustment of the semiconductor laser drive power supply. The light source injects red light into the single-mode optical fiber under test. If there are scratches or cracks on the surface of the optical fiber, the red light will leak from the defect point, and the defect will be collected and identified by using visual technology. Therefore, the device has the function of optical fiber light leakage detection. Ability to identify defects such as optical fiber scratches and cracks that cause optical fiber light leakage;

(3) The composite optical fiber defect detection device and method adopts a secondary developed laser diameter measuring instrument to realize the continuous measurement function of the bidirectional diameter of the optical fiber under test, so it has the optical fiber diameter measurement function and can measure the diameter of the orthogonal Fiber diameter fluctuations in both directions;

(4) The composite optical fiber defect detection device and method can complete the above-mentioned (1), (2) and (3) detections for the bare optical fiber in a complete measurement process, effectively improving the discontinuous and incomplete optical fiber screening Detection status, providing comprehensive and complete data support for fiber screening and detection;

(5) The data analysis module of the composite optical fiber defect detection device and method analyzes and processes the obtained optical fiber surface image, if a defect is detected, the system control module saves the image data and defect information to the database, and The interactive interface (touch screen) displays defect information and generates alarm information, so the detection method has the function of real-time acquisition of defect image data on the surface of the moving optical fiber, and provides defect identification and alarm information in real time;

(6) The defect information stored by the system control module of the composite optical fiber defect detection device and method includes data such as defect type, defect position and optical fiber measured line diameter, so the detection method has optical fiber surface image, optical fiber light leakage and Simultaneous recording of optical fiber diameter information and positioning of optical fiber abnormal points;

(7) The composite optical fiber defect detection device and method use the optical fiber cleaning module to remove dust and static electricity on the surface of the optical fiber, have the functions of optical fiber cleaning and static removal, and improve the accuracy of defect detection;

(8) According to the above items (5), (6), and (7), it can be seen that the composite optical fiber defect detection method faces a large amount of detection data, comprehensively improves the data analysis ability, and reduces the requirements for users, thereby improving improved fiber screening efficiency.

Description of drawings

Figure 1 is a schematic diagram of the composition of the composite optical fiber defect detection device of the present invention;

Fig. 2 is the working process schematic diagram in the embodiment of the present invention;

FIG. 3 is a schematic diagram of a bare optical fiber detection process in an embodiment of the present invention;

Fig. 4 is a schematic diagram of a strengthened optical fiber detection process in an embodiment of the present invention.

Detailed ways

In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

In order to solve the above technical problems, the present invention provides a composite optical fiber defect detection device, as shown in Figure 1, the composite optical fiber defect detection device includes: a light source module, an optical fiber rewinding module, an optical fiber cleaning module, and a laser diameter measurement module , defect detection module, light leakage detection module, data analysis module;

The light source module is used to inject multimode red light into the optical fiber under test;

The optical fiber rewinding module is used to control the travel of the optical fiber under test;

The optical fiber cleaning module is used to realize the function of removing dust and static electricity on the surface of the optical fiber under test, and reduce the misjudgment of optical fiber surface defect imaging detection;

The laser diameter measurement module is used to realize the continuous measurement function of the bidirectional diameter of the optical fiber under test;

The defect detection module is used for imaging and defect recording of the optical fiber under test;

The light leakage detection module uses a red light LD laser as a light source for collecting and identifying defects at light leakage using visual inspection technology;

The data analysis module is used for analyzing and processing the surface image of the optical fiber, and performing display and alarm.

Wherein, the composite optical fiber defect detection device also includes a system control module;

The system control module adopts a programmable logic controller (PLC), a human-computer interaction interface (touch screen) and an AC servo control system to realize the human-computer interaction function.

Wherein, the light source module is a red light source.

Wherein, the optical fiber rewinding module is realized by an optical fiber rewinding machine.

Wherein, the optical fiber cleaning module includes a dust removal component and a static removal component.

Wherein, the static electricity removal component is composed of an ion air bar, an ion air gun, and an ion fan.

Wherein, the laser caliper module is realized by a laser caliper.

Wherein, the defect detection module is realized by using a visible light illumination source and a high-speed CCD camera.

Among them, the defect detection module uses a high-speed CCD camera to realize the optical imaging of the optical fiber; the imaging system adopts a double-doublet lens design with a double symmetrical structure, corrects the optical phase difference, and uses the same optical structure for surface defect detection and light leakage detection. The distance and image distance are the same, and the working distance is the same, which is convenient for system debugging; because the optical fiber under test needs to be imaged rapidly and continuously, the illumination of the imaging fiber area must be uniform and stable, otherwise there will be different imaging results; for the transparent characteristics of the bare optical fiber itself , using high-power LED backlighting, in order to obtain a uniform lighting effect, a uniform light plate is inserted between the LED and the optical fiber to be tested; for the opaque characteristics of the reinforced optical fiber itself, a symmetrical side lighting method is used, the two are the same The light source is placed symmetrically, and the two groups of light sources are superimposed to obtain uniform illuminance in the imaging field of view;

In addition, the present invention also provides a composite optical fiber defect detection method, the composite optical fiber defect detection method is implemented based on the composite optical fiber defect detection device, and the method includes the following steps:

Step 1: The fiber to be tested travels at a certain speed driven by the fiber rewinding module, and detects the travel speed information of the fiber to be tested;

Step 2: The optical fiber to be tested first passes through the optical fiber cleaning module to remove dust and static electricity on the surface to reduce false alarms in defect detection; when the optical fiber is rewound, the antistatic component of the optical fiber cleaning module continuously blows ionized positive and negative ions to the tested Optical fiber, eliminate the static electricity generated when the optical fiber under test is rewound at high speed, and blow away the attached particles; the dust removal component of the optical fiber cleaning module performs dust suction treatment after the optical fiber passes through the static removal device to reduce the dust attached to the surface of the optical fiber, and then Pass through the sponge assembly, inject alcohol into the sponge, and wipe the dust on the surface of the optical fiber with the sponge;

Step 3: The optical fiber to be tested passes through the laser diameter measurement module, and the laser diameter measurement module quickly collects the fiber diameter data, and quickly compares it with the preset fiber diameter threshold, and records the abnormal data whose diameter exceeds the threshold;

Step 4: The optical fiber to be tested passes through the surface defect detection module to perform imaging and defect recording of the optical fiber under test;

Step 5: The optical fiber to be tested passes through the light leakage detection module. The light leakage detection module uses an LD laser outputting red light as a light source to inject red light into the optical fiber to be tested. When there is a defect or damage on the surface of the optical fiber, the red light will flow Leakage at defect points, using visual technology to collect and identify defects at light leaks;

Step 6: The data processing module adopts different defect detection strategies for bare optical fibers and reinforced optical fibers;

The processing flow of the bare fiber is: ①The length of the detection is regularly read from the programmable logic controller and combined with the time stamp and sent to the data processing module for storage; ②The picture read from the camera is sent to the algorithm processing module to cut the fiber area, and Process whether there is an exception, send the abnormal data to the data processing module, and the data processing module matches the distance value according to the time stamp and sends it to the abnormal recording module for recording; ③ regularly read the abnormal data recorded in the laser caliper, and record the abnormal data The data is sent to the data processing module, and the data processing module matches the distance value according to the timestamp and sends it to the abnormal recording module for recording;

The processing flow of the enhanced optical fiber is as follows: ①The combination of the detection length and the time stamp is regularly read from the programmable logic controller, and sent to the data processing module for storage; The photo is directly sent to the data processing module to match the distance value, and sent to the abnormal record data module; ③ regularly read the abnormal data in the laser caliper record, and send it to the data processing module, the data processing module matches the distance value according to the time stamp and Send to the exception recording module for recording.

In summary, the composite optical fiber defect detection method can complete three main functions of optical fiber surface defect detection imaging, fiber diameter consistency detection and optical fiber light leakage defect detection in a complete measurement process, and realize the optical fiber coating layer Composite functional detection and identification of defects such as surface cracks, damage, and abnormal wire diameters. Effectively improve the discontinuous and incomplete detection status of fiber screening, and provide comprehensive and complete data support for fiber screening and testing.

Example 1

This embodiment provides a composite optical fiber defect detection method, and the working process is shown in FIG. 2 . The detection principle of the method is:

(1) The optical fiber to be tested travels at a certain speed under the drive of the rewinding device, and detects the travel speed information of the optical fiber to be tested;

(2) The optical fiber to be tested first passes through the optical fiber cleaning module during travel to remove dust and static electricity from the surface to reduce false alarms in defect detection. Wherein, the static electricity removing device of the above-described embodiment can be composed of an ion wind rod, an ion air gun, and an ion fan. When the optical fiber is rewound, the ionized positive and negative ions are continuously blown to the optical fiber under test, eliminating the need for the optical fiber under test to be rewound at high speed. Generated static electricity, and blow off the attached particles; the dust removal device of the described embodiment performs dust suction treatment after the optical fiber passes through the static removal device to reduce the dust attached to the surface of the optical fiber, and then passes through the sponge assembly, and injects alcohol into the sponge, by Sponge to wipe the dust on the surface of the optical fiber;

(3) The optical fiber to be tested passes through the laser diameter measurement module, and the laser diameter measurement module quickly collects the fiber diameter data, and quickly compares it with the preset fiber diameter threshold, and records the abnormal data whose diameter exceeds the threshold. The laser diameter measurement module can carry out secondary development based on the laser diameter measurement instrument, and complete system integration, which can realize the function of optical fiber two-way diameter measurement;

(4) The optical fiber to be tested passes through the surface defect detection module, and the embodiment uses a high-speed CCD camera to realize the optical imaging of the optical fiber. The imaging system adopts doublet doublet lens design with double symmetrical structure to correct optical aberration, surface defect detection and light leakage detection adopt the same optical structure, the object distance and image distance of the two systems are the same, and the working distance is the same, which is convenient for system debugging. Since the optical fiber under test needs to be imaged rapidly and continuously, the illumination of the imaging fiber area must be uniform and stable, otherwise there will be imaging results with different brightness and darkness. In view of the transparent characteristics of the bare optical fiber itself, a high-power LED backlighting method is adopted. In order to obtain a uniform lighting effect, a uniform light plate is inserted between the LED and the optical fiber to be tested; for the opaque characteristics of the reinforced optical fiber itself, a symmetrical side Directional lighting mode, two identical light sources are placed symmetrically, and the two groups of light sources are superimposed to obtain uniform illuminance in the imaging field of view;

(5) The optical fiber to be tested passes through the light leakage detection module. The light leakage detection module uses an LD laser output as red light as a light source to inject red light into the optical fiber under test. When there is a defect or damage on the surface of the optical fiber, the red light will flow from the Leakage at defect points, using vision technology to collect and identify defects at light leaks. As mentioned above, light leakage detection and surface defect detection use the same optical structure lens, the difference is that the numerical aperture of the lens of the light leakage detection module is large, which increases the light collection ability and meets the requirements of weak light leakage detection. In addition, in order to reduce the interference of ambient light on light leakage detection, a narrow-band filter can be added in front of the light leakage detection lens. The central wavelength and bandwidth of the filter are selected according to the actual output parameters of the red light LD;

(6) The system control module of the composite optical fiber defect detection method adopts a programmable logic controller (PLC), a man-machine interface (touch screen) and an AC servo control system. Among them, ① AC servo system has the advantages of wide speed range, high precision of steady speed, large torque at low speed, low noise, high efficiency and high reliability; Set parameters to control the traction and cable servo controller to make the corresponding servo ground motor run; ③ The traction speed is controlled at a uniform speed to ensure the stability of the line speed and control the speed up and down of the entire system. The traction speed is set and adjusted in the man-machine interface (touch screen); ④The take-up motor adopts servo control, and the displacement change of the take-up dancer is input to the programmable logic controller (PLC) through the sensor, and the programmable logic controller (PLC) ) after calculation, control the speed of the take-up motor to realize the automatic synchronization of the take-up line speed and the pulling line speed; Value, etc., after counting and calculating the speed of the cable servo motor, control the commutation of the cable servo motor, and realize the automatic cable winding of the optical fiber take-up. The pitch of the cable is set and adjusted in the man-machine interface (touch screen);

(7) The data processing module of the embodiment adopts different defect detection strategies for the bare optical fiber and the strengthened optical fiber, as shown in FIG. 3 and FIG. 4 respectively. The processing flow of the bare fiber is: ①The length of the detection is regularly read from the programmable logic controller (PLC) and combined with the time stamp and sent to the data processing module for storage; ②The picture read from the camera is sent to the algorithm processing module to cut the fiber Area, and deal with whether there is any abnormality, and send the abnormal data to the data processing module, the data processing module matches the distance value according to the time stamp and sends it to the abnormal recording module for recording; ③ regularly read the abnormal data recorded in the laser caliper, And send the abnormal data to the data processing module, and the data processing module matches the distance value according to the time stamp and sends it to the abnormal recording module for recording. As shown in Figure 3. The processing flow of the enhanced optical fiber is: ①The combination of the detection length and the time stamp is regularly read from the programmable logic controller (PLC), and sent to the data processing module for storage; ②The laser caliper detects an abnormality and outputs a signal, triggering the camera to take pictures , the captured photos are directly sent to the data processing module to match the distance value, and sent to the abnormal record data module; ③ regularly read the abnormal data in the laser caliper record, send it to the data processing module, and the data processing module matches according to the time stamp The distance value is sent to the abnormal recording module for recording. As shown in Figure 4.

The above-mentioned composite optical fiber defect detection method is equipped with corresponding instruments and equipment according to the actual situation, and the detection index of the method can reach:

(1) The imaging frame rate is greater than or equal to 10 frames/s;

(2) The imaging resolution is 10±2μm;

(3) The minimum detectable defect size in the fiber length direction is less than or equal to 50 μm;

(4) The measuring range of wire diameter is 0.04mm～6.00mm;

(5) The measurable optical fiber length is greater than or equal to 50km;

(6) Wire diameter detection accuracy is less than or equal to 2μm;

(7) The traveling speed of the optical fiber is greater than or equal to 0.2m/s;

(8) A continuous measurement time is greater than or equal to 100h.

This embodiment has the function of high-speed acquisition of optical fiber surface images, which can identify defects on the optical fiber surface; has the function of optical fiber light leakage detection, can identify defects such as scratches and cracks that cause optical fiber light leakage; Fiber diameter fluctuations in both directions.

This embodiment creatively designs a composite defect detection method for bare optical fiber and strengthened optical fiber. The test method is ingenious, reduces the difficulty of testing, has high test accuracy, and the data is comprehensive and effective, laying a foundation for the composite optical fiber defect detection method. Base.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A composite optical fiber defect detection device, characterized in that the composite optical fiber defect detection device comprises: a light source module, an optical fiber rewinding module, an optical fiber cleaning module, a laser diameter measurement module, a defect detection module, a light leakage detection module, data analysis module; The light source module is used to inject multimode red light into the optical fiber under test; The optical fiber rewinding module is used to control the travel of the optical fiber under test; The optical fiber cleaning module is used to realize the function of removing dust and static electricity on the surface of the optical fiber under test, and reduce the misjudgment of optical fiber surface defect imaging detection; The laser diameter measurement module is used to realize the continuous measurement function of the bidirectional diameter of the optical fiber under test; The defect detection module is used for imaging and defect recording of the optical fiber under test; The light leakage detection module uses a red light LD laser as a light source for collecting and identifying defects at light leakage using visual inspection technology; The data analysis module is used for analyzing and processing the surface image of the optical fiber, and performing display and alarm. 2. The composite optical fiber defect detection device according to claim 1, wherein the composite optical fiber defect detection device also includes a system control module; The system control module adopts a programmable logic controller, a human-computer interaction interface and an AC servo control system to realize the human-computer interaction function. 3. The composite optical fiber defect detection device according to claim 1, wherein the light source module is a red light source. 4. The composite optical fiber defect detection device according to claim 1, wherein the optical fiber rewinding module is realized by an optical fiber rewinding machine. 5. The composite optical fiber defect detection device according to claim 1, wherein the optical fiber cleaning module includes a dust removal component and a static electricity removal component. 6 . The composite optical fiber defect detection device according to claim 5 , wherein the static electricity removal component is composed of an ion air bar, an ion air gun, and an ion fan. 7 . 7. The composite optical fiber defect detection device according to claim 1, wherein the laser caliper module is realized by a laser caliper. 8. The composite optical fiber defect detection device according to claim 1, wherein the defect detection module is realized by a visible light illumination source and a high-speed CCD camera. 9. The composite optical fiber defect detection device as claimed in claim 8, wherein the defect detection module adopts a high-speed CCD camera to realize the optical imaging of the optical fiber; Phase difference, surface defect detection and light leakage detection adopt the same optical structure, the object distance and image distance of the two systems are the same, and the working distance is the same, which is convenient for system debugging; because the optical fiber to be tested needs to be imaged rapidly and continuously, the illumination of the imaging fiber area must be uniform Stable, otherwise there will be different imaging results of light and dark; for the transparent characteristics of the bare fiber itself, high-power LED backlighting is used, in order to obtain a uniform lighting effect, a uniform light plate is inserted between the LED and the fiber to be tested; for enhanced Due to the opaque nature of the optical fiber itself, a symmetrical side lighting method is adopted, and two identical light sources are placed symmetrically, and the two groups of light sources are superimposed to obtain uniform illuminance in the imaging field of view. 10. A composite optical fiber defect detection method, characterized in that the composite optical fiber defect detection method is implemented based on the composite optical fiber defect detection device according to any one of claims 1 to 9, and the method comprises the following steps : Step 1: The fiber to be tested travels at a certain speed driven by the fiber rewinding module, and detects the travel speed information of the fiber to be tested; Step 2: The optical fiber to be tested first passes through the optical fiber cleaning module to remove dust and static electricity on the surface to reduce false alarms in defect detection; when the optical fiber is rewound, the antistatic component of the optical fiber cleaning module continuously blows ionized positive and negative ions to the tested Optical fiber, eliminate the static electricity generated when the optical fiber under test is rewound at high speed, and blow away the attached particles; the dust removal component of the optical fiber cleaning module performs dust suction treatment after the optical fiber passes through the static removal device to reduce the dust attached to the surface of the optical fiber, and then Pass through the sponge assembly, inject alcohol into the sponge, and wipe the dust on the surface of the optical fiber with the sponge; Step 3: The optical fiber to be tested passes through the laser diameter measurement module, and the laser diameter measurement module quickly collects the fiber diameter data, and quickly compares it with the preset fiber diameter threshold, and records the abnormal data whose diameter exceeds the threshold; Step 4: The optical fiber to be tested passes through the surface defect detection module ^{to perform} imaging and defect recording of the optical fiber under test; Step 5: The optical fiber to be tested passes through the light leakage detection module. The light leakage detection module uses an LD laser outputting red light as a light source to inject red light into the optical fiber to be tested. When there is a defect or damage on the surface of the optical fiber, the red light will flow Leakage at defect points, using visual technology to collect and identify defects at light leaks; Step 6: The data processing module adopts different defect detection strategies for bare optical fibers and reinforced optical fibers; The processing flow of the bare fiber is: ①The length of the detection is regularly read from the programmable logic controller and combined with the time stamp and sent to the data processing module for storage; ②The picture read from the camera is sent to the algorithm processing module to cut the fiber area, and Process whether there is an exception, send the abnormal data to the data processing module, and the data processing module matches the distance value according to the time stamp and sends it to the abnormal recording module for recording; ③ regularly read the abnormal data recorded in the laser caliper, and record the abnormal data The data is sent to the data processing module, and the data processing module matches the distance value according to the timestamp and sends it to the abnormal recording module for recording; The processing flow of the enhanced optical fiber is as follows: ①The combination of the detection length and the time stamp is regularly read from the programmable logic controller, and sent to the data processing module for storage; The photo is directly sent to the data processing module to match the distance value, and sent to the abnormal record data module; ③ regularly read the abnormal data in the laser caliper record, and send it to the data processing module, the data processing module matches the distance value according to the time stamp and Send to the exception recording module for recording.

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