CN111812026A - Test device and test method for winding reliability of optical fiber coating - Google Patents

Abstract

The invention discloses a testing device and a testing method for the winding reliability of an optical fiber coating, comprising a wire winding wheel, a mobile base, a wire winding motor, a linear guide rail, a traverse drive screw, a coupling, a wire arrangement motor, a limiter Position pulley, traverse nut and weight, the mobile base moves laterally, and the wire winding motor is installed on it. The wire winding wheel is connected with the output shaft of the wire winding motor. The block is used for guiding, the screw nut is sleeved on the screw, and when the screw rotates, it moves laterally; the ball screw is connected with the wire-arranging motor through a coupling, and a limit pulley is installed at the lower part of the fixed base. Move vertically in the pulley groove. It can be used to evaluate the long-term reliability of optical fiber coatings. By using the method and device, the winding reliability of various optical fibers can be expressed conveniently and quantitatively. It can be used to evaluate the reliability of special fiber coatings such as polarization-maintaining fibers and bend-insensitive fibers.

Description

Test device and test method for winding reliability of optical fiber coating

technical field

The invention belongs to the technical field of optical fiber fabrication and detection, and in particular relates to a testing device and a testing method for the winding reliability of an optical fiber coating.

Background technique

The coating layer of the existing optical fiber usually adopts an inner coating layer and an outer coating layer, which jointly protect the surface of the optical fiber from moisture and external mechanical damage, improve the microbending resistance of the optical fiber, and reduce the additional loss function of the optical fiber.

At present, the main judgment method to measure the reliability of the coating layer is the stripping force test of the optical fiber. Fiber stripping force is defined as the force required to mechanically strip the fiber coating along the axis. The specific test methods and index ranges are specified in the documents of IEC-60793-1-32, FTOP-178 and GR-20. The national standard GB/T 9771 and GB/T15972.32 stipulate the scope and test method of optical fiber stripping force. Studies have shown that the peeling force is not only affected by the adhesion between the inner coating of the optical fiber and the glass, but also closely related to the outer coating of the optical fiber. The material properties of the outer coating are the main factors affecting the peeling force of the optical fiber. The strength, hardness and annular area of the outer coating jointly determine the stripping force of the optical fiber, which is not directly related to the reliability of the optical fiber, especially the tensile winding resistance.

Both the fiber optic gyro ring and the fiber optic hydrophone sensitive ring need to be wound by optical fibers, and a certain tension will be applied to the optical fibers during the winding process, and even external force tools will be used to assist the winding. Therefore, the special optical fiber coating under this condition requires higher reliability. However, in the existing test methods, there is no other suitable method except that the stripping force of the optical fiber can characterize the winding reliability of the coating to a certain extent.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a testing device and a testing method for the winding reliability of an optical fiber coating, which can be used for evaluating the long-term reliability of the optical fiber coating.

The technical scheme adopted by the present invention to solve the technical problem is as follows: first, a testing device for the winding reliability of optical fiber coating is provided, which includes a wire winding wheel, a mobile base, a wire winding motor, a linear guide rail, a traverse drive screw, a coupling Shaft, wire-arranging motor, limit pulley and weight, the mobile base moves laterally, and the wire-winding motor is installed on it. The wire-winding wheel is connected with the output shaft of the wire-winding motor. The lower part is equipped with a guide slider and a screw nut. The guide slider is used for guiding, and the screw nut is sleeved on the screw. When the screw rotates, it moves laterally; the ball screw is connected to the screw motor through a coupling, which is fixed A limit pulley is installed on the lower part of the base, and the optical fiber moves vertically in the pulley groove when the wire is wound. It also includes a bearing and a shaft locking nut. The bearing is installed in the machine base to provide support for the wire winding wheel. The bearing is fixed by the shaft locking nut. The shaft locking nut is installed on the wire winding wheel shaft to restrain the axial movement of the bearing.

According to the above technical solution, the weight is fixed on the end of the optical fiber. Relying on the tension generated by the gravity of the weight, the tension is uniform when winding the wire.

According to the above technical solution, a round rod is also included for fixing the optical fiber for optical fiber winding, and the material of the round rod is metal, glass or plastic.

According to the above technical solution, the diameter of the round rod is in the range of 3mm-200mm.

According to the above technical solution, the speed range of the wire-arranging motor and the wire-winding motor is 1-300rpm.

According to the above technical solution, the traverse drive screw is used to make the winding wheel fixed on it move left and right in the horizontal direction according to a preset speed, and cooperate with the rotation of the round rod to realize the winding and unwinding of the optical fiber.

The present invention also provides a method for testing the winding reliability of an optical fiber coating. The method includes the following steps. Step 1: Take an optical fiber with a preset length, fix one end on a round rod and wrap it for several times, so that the optical fiber passes through the concave groove of the guide wheel. In the groove, the other end of the optical fiber hangs a heavy object; in step 2, the control panel controls the left and right movement of the guide wheel and the rotation speed of the round rod, and repeatedly winds and unwinds the optical fiber as needed; in step 3, through the repeated winding and unwinding of the optical fiber to be tested The reliability of the fiber is judged by coating deformation, coating peeling, and coating bubbles in the process.

According to the above technical solution, the force exerted on the axial direction of the optical fiber during the winding and unwinding process is a constant pulling force. This constant tension is applied by suspending a weight at one end of the fiber or by a mechanical device capable of controlling the magnitude of the force.

The beneficial effect of the invention is that it can be used for the evaluation of the long-term reliability of the optical fiber coating, and the method and the device can conveniently and quantitatively express the winding reliability of various optical fibers. It can be widely used to evaluate the reliability of special fiber coatings such as polarization-maintaining fibers and bend-insensitive fibers.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural diagram of a testing device for the winding reliability of an optical fiber coating according to an embodiment of the present invention;

Fig. 2 is the left side view of the testing device for the winding reliability of the optical fiber coating according to the embodiment of the present invention;

FIG. 3 is a schematic diagram of an electrical control system in an embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example 1:

As shown in Figures 1-2, the test device for the winding reliability of the optical fiber coating includes a winding wheel 1, a mobile base 2, a winding motor 5, a linear guide 6, a traverse drive screw 7, a coupling 8, Wire arrangement motor 9, limit pulley 10, traverse nut 11, weight 12, bearing 3 and shaft locking nut 4, the mobile base moves laterally, on which is equipped with a wire winding motor, a wire winding wheel and the output shaft of the wire winding motor Connected, the mobile base is fixed on the linear guide, the lower part of the mobile base is equipped with 4 guide sliders and screw nuts, the guide sliders are used for guiding, the screw nuts are sleeved on the screw, when the screw rotates, the horizontal Move; the ball screw is connected to the wire-arranging motor through a coupling, and a limit pulley is installed at the lower part of the fixed base. When the wire is wound, the optical fiber 13 moves vertically in the pulley groove. The bearing is installed in the machine base to provide support for the wire winding wheel. The bearing is fixed by the shaft locking nut. The shaft locking nut is installed on the wire winding wheel shaft to restrain the axial movement of the bearing. The weight is fixed to the end of the fiber. Relying on the tension generated by the gravity of the weight, the tension is uniform when winding the wire. Also includes a round rod, used to fix the optical fiber for fiber winding, the round rod is made of metal, glass or plastic, and the diameter of the round rod ranges from 3mm to 200mm. The speed range of the wire-arranging motor and the wire-winding motor is 1-300rpm. The traverse drive screw is used to make the winding wheel fixed on it move left and right in the horizontal direction according to the preset speed, and cooperate with the rotation of the round rod to realize the winding and unwinding of the optical fiber.

Embodiment 2:

A method for testing the winding reliability of an optical fiber coating, the method comprises the following steps. In step 1, an optical fiber of a preset length is taken, one end is fixed on a round rod with an adhesive tape and wound for several times, so that the optical fiber passes through the groove of the guide wheel, The other end of the optical fiber hangs a heavy object; in step 2, the control panel controls the left and right movement of the guide wheel and the rotation speed of the round rod, and repeatedly winds and unwinds the optical fiber as needed; in step 3, through the process of repeated winding and unwinding of the optical fiber to be tested The reliability of the fiber is judged by coating deformation, coating peeling, and coating bubbles. In the process of winding and unwinding, the force applied to the axial direction of the optical fiber is a constant tensile force. This constant tension is applied by suspending a weight at one end of the fiber or by a mechanical device capable of controlling the magnitude of the force.

In the embodiment of the present invention, there are three groups of optical fiber samples to be tested, which are respectively denoted as sample 1, sample 2, and sample 3. The outer diameter of the bare optical fiber of the three groups of samples is 80 μm, and the diameter of the outer coating is 135 μm, but the inner and outer diameters of the optical fibers are all 80 μm. There are different types of coatings.

The mechanical part of the test equipment includes: wire winding wheel, moving base, bearing, shaft lock nut, wire winding motor, linear guide traverse drive screw, coupling, wire row motor, limit pulley, traverse nut . Among them, the schematic diagram of the electrical control part is shown in Figure 3 below, which mainly includes the wire winding motor, the wire row motor, the wire winding motor controller, the wire row motor controller, the PLC and the control panel. The operator issues commands such as motor start, stop, motion direction, and motion speed through the control panel. The commands are transmitted to the PLC by the communication cable. The PLC receives the command information, and issues motion commands to the motor controller after compiling the program. The motor rotates clockwise and counterclockwise, and the wire-arranging motor performs left and right movement. Through the constant speed movement of the guide wheel and the constant speed rotation of the round rod, the preset spacing and regular winding arrangement are maintained between each circle of fibers.

Cut the 1.2-meter-long optical fiber sample 1 to be tested. One end of the optical fiber is attached to the right end of the winding wheel with a thin tape with strong adhesiveness and wound manually for 5 turns. The other end of the optical fiber sags naturally.

Use tape to fix the fiber to the weight at the end that sags naturally, the weight in this example is 250g. Make the linear guide move to the left at a constant speed at a speed of 6.48mm/min.

Make the wire winding wheel rotate at a constant speed at a speed of 12 turns/min and in the same direction as the manual winding direction. The wire winding wheel is made of stainless steel with a diameter of 6mm. The machine was automatically wound 50 times, which took 250 seconds, and the base and the winding wheel advanced a total of 27mm to the left. Make the machine rotation direction and movement direction opposite to the above-mentioned 50 turns of winding, but the values are the same, and unwind.

The above-mentioned winding and unwinding are one cycle, and the sample 1 is tested for 10 cycles. Samples 2 and 3 were tested for 10 cycles in the manner described in sample 1.

The optical fiber coating is inspected under the microscope, and the results of the coating are obtained. These abnormalities will affect the performance and long-term reliability of the optical fiber and device to varying degrees. Take the 5cm fiber in the middle of the winding and observe it carefully along the axis of the fiber under a microscope and record the number of occurrences of the above three kinds of abnormalities, as shown in Table 1 below.

Table 1 Sample test results

The main problem of the sample 1 fiber is that the outer coating modulus is lower and the fiber is softer, and the fiber is easily deformed under the action of external force. The main problem with the sample 2 fiber is that the adhesion between the inner coating and the glass is less, and the coating and the glass are easier to peel off. No abnormality was found in the sample 3 optical fiber after the winding test, and the reliability of the coating met the winding requirements.

Record the number of defects, such as fiber bubbles, stripping, over a certain length of fiber inspected. The reliability of the fiber is judged by coating deformation, coating peeling, and coating bubbles during the repeated winding and unwinding of the fiber to be tested.

The technical solution of this embodiment can flexibly design various test parameters, such as tensile force, winding diameter, test period, etc., according to the user's requirements for the optical fiber use environment. The winding reliability of the optical fiber coating is judged and the quantitative results are obtained, which can be widely used in optical fiber manufacturing, optical fiber coating development, coating matching research, optical fiber detection and other technical fields.

It should be understood that for those skilled in the art, improvements or changes can be made according to the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims (8)

1. a test device for optical fiber coating winding reliability, it is characterized in that, comprise wire winding wheel, mobile base, wire winding motor, linear guide rail, traverse drive screw, coupling, wire arrangement motor, limiter Pulleys and weights, the mobile base moves laterally, a wire winding motor is installed on it, the wire winding wheel is connected to the output shaft of the wire winding motor, the mobile base is fixed on the linear guide rail, and the lower part of the mobile base is installed with a guide rail slider and a screw rod The nut, the guide slider are used for guiding, the screw nut is sleeved on the screw, and when the screw rotates, it moves laterally; the ball screw is connected with the screw motor through a coupling, and a limit pulley is installed at the lower part of the fixed base. When the fiber is spun, the fiber moves vertically in the pulley groove. 2 . The testing device for the winding reliability of an optical fiber coating according to claim 1 , wherein the weight is fixed on the end of the optical fiber. 3 . 3 . The testing device for the winding reliability of an optical fiber coating according to claim 1 or 2 , further comprising a round rod for fixing the optical fiber for optical fiber winding, and the material of the round rod is metal, glass or plastic. 4 . 4 . The testing device for the winding reliability of an optical fiber coating according to claim 3 , wherein the diameter of the round rod ranges from 3 mm to 200 mm. 5 . 5 . The testing device for the winding reliability of an optical fiber coating according to claim 1 or 2 , wherein the rotational speed of the wire-arranging motor and the wire-winding motor ranges from 1 to 300 rpm. 6 . 6. The testing device for the winding reliability of an optical fiber coating according to claim 1 or 2, wherein the traverse drive screw is used to make the winding wheel fixed on it in the horizontal direction according to a preset speed. The movement is matched with the rotation of the round rod to realize the winding and unwinding of the optical fiber. 7. A method for testing the winding reliability of an optical fiber coating, characterized in that the method comprises the following steps. In step 1, an optical fiber of a preset length is taken, and one end is fixed on a round rod and wound several times, so that the optical fiber passes through the guide wheel. In the second step, the control panel controls the left and right movement of the guide wheel and the rotation speed of the round rod, and repeats the winding and unwinding of the optical fiber as required; in the third step, through the repeated winding and The reliability of the fiber is judged by coating deformation, coating peeling, and coating bubbles during the unwinding process. 8 . The method for testing the winding reliability of an optical fiber coating according to claim 7 , wherein the force applied to the axial direction of the optical fiber during the process of winding and unwinding is a constant tensile force. 9 .

Images