CN115266044B - Photoelectric test fixture and early warning method thereof - Google Patents

Abstract

The invention discloses a photoelectric test fixture and an early warning method thereof, which comprise an optical fiber winding part. On the fiber winding part, there is a winding roller that can adjust the outer diameter of the winding, and an optical fiber traction pretension shaft for controlling the winding tightness of the wound optical fiber, so that the optical fibers with different bending curvatures can be obtained from one side. Simulate the arrangement of actual optical fiber lighting lines, and then conduct optical transmission loss tests on optical fibers with different curvatures, and then judge the level of optical fiber quality, facilitate the selection of qualified optical fibers, and perform transmission loss tests on optical fibers before selecting suitable optical fiber lines Early warning, specifically through optical transmission of optical fibers with different curvatures for optical fibers of the same specification and brand, and then use a closed box to receive the transmitted light source, measure the brightness of the light source in the closed box, and then compare the brightness of optical fibers with different curvatures , in order to select a better optical fiber, which has the advantage of early warning for optical fiber material selection.

Description

A photoelectric test fixture and its early warning method

technical field

The invention relates to the technical field of power system optical fiber transmission, in particular to a photoelectric test fixture and an early warning method thereof.

Background technique

The emerging photoelectric transmission of the power system is optical fiber lighting transmission. The fiber optic lighting system is composed of a light source, a reflector, a color filter and an optical fiber. Specifically, the LED light source refracts the light source to the optical fiber through the reflector, and the light source is transmitted to the luminous object through the optical fiber. In this way, lighting can be realized, and optical fiber lighting transmission realizes photoelectric separation, which reduces the cost and improves the safety level of light transmission; due to the loss of optical fiber transmission, in order to obtain sufficient brightness in the target area, it is necessary to increase the power of the light source, which in turn will increase Energy consumption, while the loss of optical fiber optical transmission is mainly concentrated in the case of too long lines and bent lines. Among them, the main factor is that the optical fiber loss is large when the line is bent, and the bending of the optical fiber is unavoidable in the actual wiring process. Therefore, it is necessary to The optical fiber transmission loss test for different bending curvatures of the optical fiber is used to facilitate the selection of optical fibers with suitable bending curvatures, thereby reducing energy consumption.

Therefore, the present invention provides a photoelectric test fixture and an early warning method thereof.

Contents of the invention

The purpose of the present invention is to solve the problems mentioned in the background technology, and propose a photoelectric test fixture and its early warning method.

In order to achieve the above object, the present invention adopts the following technical solutions:

A photoelectric test fixture, comprising an optical fiber winding part, a support frame, an adjustable outer diameter winding roller located on the support frame, an optical fiber pulling pretension shaft and a rotating arm are arranged on the optical fiber winding part. One end of the circle roller is fixedly connected with the support frame, one end of the rotating arm is rotationally connected with the other end of the circle roller and the rotation axis is parallel to the axis of the circle roller, and the other end of the arm is rotated and Sliding fit, the fiber pulling pretension shaft is parallel to the winding roller.

As a further description of the above technical solution:

The winding roller is provided with a tapered roller shaft and an adjustment shaft coaxial with the tapered roller shaft. The adjustment shaft runs through the middle of the tapered roller shaft and is axially slidingly fitted. One end of the adjustment shaft is fixed There is a cross rod, and the small end of the tapered roller shaft is provided with a cross relief groove opposite to the cross rod.

As a further description of the above technical solution:

The support frame is fixedly provided with a vertical plate, and the large end of the tapered roller shaft is fixedly provided with a positioning tube that runs through one side of the vertical plate and is fixedly connected. One end of the positioning tube is covered with a rotary sleeve, and the rotary sleeve Located on the outside of the adjustment shaft and is a screw fit.

As a further description of the above technical solution:

One end of the rotating arm is rotatably connected to the small end of the tapered roller shaft, the other end of the rotating arm is rotatably connected to a connecting sleeve and a torsion spring is arranged at the rotating connection, and the optical fiber traction pretensioning shaft is sleeved on the connecting sleeve inside and an axial sliding fit.

As a further description of the above technical solution:

The end of the optical fiber traction pretension shaft close to the tapered roller shaft is fixed with a coaxial stop plate, and the optical fiber traction pretension shaft is provided with an annular pressure plate and a spring. Under the action of the spring, the annular pressure plate and the The baffle plate resists the pressure, and the disk surface opposite to the baffle plate on the annular pressure plate is a conical surface and the small end points to the baffle plate.

A photoelectric test early warning method, comprising the following steps:

Step 1. Select several optical fibers with the same specification and the same length;

Step 2. Connect one end of several optical fibers of equal length to the reflector of the LED light source respectively, and then extend the other end of the optical fiber into a closed box of the same specification, and install the tail light, tail light and the other end of the optical fiber in the airtight box. One end coupling;

Step 3. Adjust one of the optical fibers to an approximate non-bending state, and wind the remaining optical fibers through the tapered roller shaft on the outer diameter adjustable winding roller, and the remaining different optical fibers have different winding diameters;

Step 4. Install a luminance tester of the same specification in each airtight box, and test the luminance released by each optical fiber through the taillight, and finally obtain the luminance value;

Step 5: Comparing the measured brightness values to obtain the loss of optical fiber lighting with the same specification at different bending degrees during transmission.

As a further description of the above technical solution: in step 3, the diameter of the optical fiber coil is in the range of 5cm-20cm.

As a further description of the above technical solution: in step 3, the number of turns of the optical fiber is 10-15 turns.

In summary, owing to adopting above-mentioned technical scheme, the beneficial effect of the present invention is:

1. In the present invention, an optical fiber winding part is provided, and a winding roller that can adjust the outer diameter of the winding is arranged on the optical fiber winding part, and an optical fiber traction pretension shaft for controlling the winding tightness of the wound optical fiber is arranged, thereby Optical fibers with different bending curvatures can be obtained to simulate the arrangement of the actual optical fiber lighting line on one side, and then the optical transmission loss test is carried out on the optical fibers with different curvatures, and then the quality level of the optical fiber can be judged, which is convenient for the selection of qualified optical fibers.

2. In the present invention, before selecting a suitable optical fiber line, the transmission loss test and early warning of the optical fiber is carried out. Specifically, the optical fiber of the same specification and brand is used for optical transmission with different curvatures, and then the closed box is used to receive the transmitted light source. The brightness of the light source in the closed box is measured, and then the brightness of optical fibers with different curvatures is compared, and the better optical fiber is selected in turn, which has the advantage of early warning for optical fiber selection.

Description of drawings

Fig. 1 is the structural schematic diagram of the optical fiber winding portion of a kind of photoelectric test fixture that the present invention proposes;

Fig. 2 is the structural schematic diagram of the detailed connection of a vertical plate, a rotating sleeve and a winding roller of a photoelectric test fixture proposed by the present invention;

Fig. 3 is a schematic diagram of the enlarged structure of part "a" in Fig. 2 of a kind of photoelectric test fixture proposed by the present invention;

FIG. 4 is a structural schematic diagram of the cooperation between the optical fiber pulling pretension shaft and the rotating arm of a photoelectric test fixture proposed by the present invention.

illustration:

1. Optical fiber winding part; 11. Support frame; 111. Vertical plate; 12. Winding roller; 121. Tapered roller shaft; 1211. Cross relief groove; 1212. Positioning tube; 122. Adjustment shaft; 13, optical fiber traction pretension shaft; 131, baffle plate; 132, annular pressure plate; 133, spring; 14, rotating arm; 141, connecting sleeve; 2, rotating sleeve.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Embodiment 1: Please refer to Fig. 1-4, a kind of photoelectric test jig, this jig is used for testing the relationship between the loss of light transmission in the optical fiber lighting and the bending of the optical fiber, it is convenient to select the best optical fiber, the test jig includes the optical fiber The winding part 1, the fiber winding part 1 is provided with a support frame 11, an outer diameter adjustable winding roller 12 located on the support frame 11, an optical fiber traction pretension shaft 13 and a rotating arm 14, and the support frame 11 plays a supporting role. The function of the optical fiber winding part 1 is that the bottom is fixed with a seat plate, which is installed on the workbench by bolts, and one end of the winding roller 12 is fixedly connected with the support frame 11, that is to say, the winding roller 12 cannot rotate relative to the support frame 11 , the winding roller 12 is the roller shaft of the optical fiber winding, one end of the rotating arm 14 is rotatably connected to the other end of the winding roller 12 and the rotation axis is parallel to the axis of the winding roller 12, and the other end of the rotating arm 14 is drawn to the optical fiber The pretension shaft 13 rotates and slides, and the optical fiber traction pretension shaft 13 is parallel to the winding roller 12. The function of the optical fiber traction pretension shaft 13 is to promote the winding of the optical fiber on the winding roller 12, and make the winding more compact and not loose. Among them, the winding roller 12 has the function of adjusting the outer diameter of the optical fiber winding, which is convenient for optical transmission testing of optical fibers with different winding outer diameters; specifically, the winding roller 12 is provided with a tapered roller shaft 121 and is coaxial with the tapered roller shaft 121. The center of the adjustment shaft 122, the adjustment shaft 122 runs through the middle of the tapered roller shaft 121 and is an axial sliding fit, one end of the adjustment shaft 122 is fixed with a cross bar 1221, and the small end of the tapered roller shaft 121 is provided with a cross The cross stop rod 1221 is opposite to the cross relief groove 1211, and the cross stop rod 1221 is accommodated in the groove of the cross relief groove 1211. After the optical fiber is wound on the outer tapered surface of the tapered roller shaft 121, the cross stop rod 1221 and the tapered roller The tapered surface of the shaft 121 determines the winding outer diameter, that is to say, when the optical fiber is wound on the tapered roller shaft 121, it will be close to the side of the cross rod 1221, and the optical fiber can be adjusted by controlling the adjustment shaft 122 to slide axially relative to the tapered roller shaft 121 The diameter after winding on the tapered roller shaft 121, the further support frame 11 is fixedly provided with a vertical plate 111, and the large end of the tapered roller shaft 121 is fixedly provided with a positioning tube 1212 that runs through one side of the vertical plate 111 and is fixedly connected. , the other end of the adjustment shaft 122 passes through the positioning tube 1212 and extends to the outside, one end of the positioning tube 1212 is sleeved with a rotary sleeve 2, and the rotary sleeve 2 is sleeved on the outside of the adjustment shaft 122 and is screw fit, thus The axial movement of the adjustment shaft 122 can be driven by controlling the rotation of the rotary sleeve 2 by the rotation action, thereby controlling the axial movement of the adjustment shaft 122 is convenient to operate; further, one end of the rotating arm 14 is rotationally connected with the small end of the tapered roller shaft 121, Specifically, the positioning shaft is welded at one end of the tapered roller shaft 121, and then the sleeve is welded on the outside of the positioning shaft at one end of the rotating arm 14. A torsion spring is provided, and the torsion spring is a multi-turn torsion spring. When the connecting sleeve 141 rotates relative to the rotating arm 14, the torsion spring will be compressed, and the optical fiber traction pretension shaft 13 is sleeved in the connecting sleeve 141 and is axially slidable. The purpose of the axial movement of the optical fiber traction pretension shaft 13 is to facilitate the change of the position of the optical fiber according to the winding radius of the optical fiber. Specifically, the end of the optical fiber traction pretension shaft 13 close to the tapered roller shaft 121 is fixed with a coaxial core. The baffle plate 131, the optical fiber traction pretension shaft 13 is sleeved with an annular pressure plate 132 and a spring 133, under the action of the spring 133, the annular pressure plate 132 and the baffle plate 131 are pressed, and the annular pressure plate 132 and the baffle plate The opposite disc surface of 131 is a conical surface and the small end points to the baffle plate 131. When the optical fiber is in contact with the optical fiber traction pretension shaft 13, it is located between the annular pressure plate 132 and the baffle plate 131. The annular pressure plate 132 and the optical fiber traction pretension shaft 13 are axially Sliding setting means that the conical surface of the annular pressure plate 132 will squeeze the optical fiber. This structure cooperates with the above-mentioned torsion spring to increase the traction force of the optical fiber pulling pretension shaft 13 on the optical fiber, and then can make the optical fiber wound on the tapered roller shaft 121 Fiber loops are tighter.

A photoelectric test early warning method, comprising the following steps:

Step 1. Select several optical fibers with the same specification and the same length. Take the length of 5 meters as an example. Select optical fibers with the same specification and different brands in this way. For different brands of optical fibers, select a number of optical fibers with the same length. Compared;

Step 2. Connect one end of several optical fibers with equal length to the reflector of the LED light source respectively. The LED light source is transmitted to the optical fiber through the refraction of the reflector, and then the other end of the optical fiber is respectively inserted into the airtight box of the same specification. The optical fiber Use its own refraction to transmit light to the end, install a tail light in the airtight box, the tail light is coupled with the other end of the optical fiber, and then the optical fiber illuminates the airtight box through the tail light, the box specification can be a cube box of 1 cubic meter;

Step 3. Adjust one of the optical fibers to an approximately non-bending state. This state is to simulate the situation where the optical fiber transmits the light source in an approximately straight line state, and pass the remaining optical fibers through the tapered roller shaft on the outer diameter adjustable winding roller 12. 121 for winding, and the other different optical fiber winding diameters are different. The smaller the fiber winding diameter, the greater the bending degree, which will affect the transmission of light, which is often referred to as optical transmission loss. Among them, the fiber winding diameter range It is 5cm-20cm, this range is the interval of different fiber coil diameters, the number of fiber coils is 10-15 circles, and the same number of circles is selected for a single test;

Step 4. Install a luminance tester of the same specification in each airtight box. Since the luminance comparison is used to obtain the transmission loss of the optical fiber, the luminance tester can use any specification, and test the brightness released by each optical fiber through the taillight , and finally get the brightness value.

Step 5. Compare the measured brightness values to obtain the loss of optical fibers of the same specification at different bending degrees during lighting transmission. Specifically, the optical fibers with different winding outer diameters and optical fibers in an approximately non-bent state are measured. The brightness comparison of several optical fibers of the same brand and specification is quite different (according to the gradient of the winding radius), which means that the quality of the fiber is poor. The quality of the optical fiber is relatively poor, so the optical fiber with a smaller brightness difference can be selected.

The working principle of this jig: When in use, a limit card can be installed on one side of the vertical plate 111. When winding the optical fiber, the optical fiber is clamped on the limit card, and then the fiber body is leaned against the tapered roller. On the cone wall of the shaft 121, at this time, manually hold the fiber traction pretension shaft 13 and slide it axially to make the gap between the optical fiber and the annular pressure plate 132 and the stop plate 131 on it dock, and then adjust and adjust through the rotary sleeve 2 The axial position of the shaft 122, where the fiber traction pretension shaft 13 makes the fiber close to the side of the cross bar 1221, and then controls the rotation of the rotating arm 14 (just rotate the fiber optic traction pretension shaft 13 by hand), at this time the fiber traction pretension The tight shaft 13 will pull the optical fiber and squeeze and wind the optical fiber on the tapered roller shaft 121, so as to obtain compact optical fibers with different winding outer diameters and the same number of winding turns. At this time, the optical fiber illumination transmission brightness measurement is performed to obtain the loss Brightness difference; the position of the cross bar 1221 can be adjusted by rotating the swivel 2, and the outer diameter of the optical fiber after winding can be changed to obtain the transmission loss of the optical fiber at different bending degrees.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (7)

1. A photoelectric test fixture, characterized in that it includes an optical fiber winding part (1), the optical fiber winding part (1) is provided with a support frame (11), and the outer diameter on the support frame (11) is An adjustable winding roller (12), an optical fiber traction pretension shaft (13) and a rotating arm (14), one end of the winding roller (12) is fixedly connected to the support frame (11), and the rotating arm (14) One end of the rotating arm (14) is rotationally connected with the other end of the winding roller (12) and the rotation axis is parallel to the axis of the winding roller (12). , the optical fiber pulling pretension shaft (13) is parallel to the winding roller (12); The winding roller (12) is provided with a tapered roller shaft (121) and an adjustment shaft (122) coaxial with the tapered roller shaft (121), and the adjustment shaft (122) runs through the tapered roller shaft ( The middle part of 121) is an axial sliding fit, one end of the adjustment shaft (122) is fixed with a cross bar (1221), and the small end of the tapered roller shaft (121) is provided with a cross bar (1221) Opposite cross give way slot (1211). 2. A photoelectric test fixture according to claim 1, characterized in that a vertical plate (111) is fixedly arranged on the support frame (11), and the large end of the tapered roller shaft (121) is fixed There is a positioning tube (1212) that runs through one side of the vertical plate (111) and is fixedly connected. One end of the positioning tube (1212) is sleeved with a rotary sleeve (2), and the rotary sleeve (2) is sleeved on the adjustment shaft ( 122) and is a screw fit. 3. A photoelectric test fixture according to claim 2, characterized in that one end of the rotating arm (14) is rotationally connected to the small end of the tapered roller shaft (121), and the rotating arm (14) The other end is rotatably connected to a connecting sleeve (141) and a torsion spring is provided at the rotating connection. The optical fiber traction pre-tightening shaft (13) is sheathed in the connecting sleeve (141) and is axially slidably fitted. 4. A photoelectric test fixture according to claim 3, characterized in that, the end of the optical fiber pulling pretension shaft (13) close to the tapered roller shaft (121) is fixedly provided with a coaxial stop plate (131), an annular pressure plate (132) and a spring (133) are sheathed on the optical fiber traction pretension shaft (13), and under the action of the spring (133) the annular pressure plate (132) and the retaining plate (131) resist Press, the surface of the annular pressure plate (132) opposite to the baffle plate (131) is a conical surface and the small end points to the baffle plate (131). 5. A photoelectric test early warning method, used for a kind of photoelectric test fixture as described in any one of claims 1-4, is characterized in that, comprises the following steps: Step 1. Select several optical fibers with the same specification and the same length; Step 2. Connect one end of several optical fibers of equal length to the reflector of the LED light source respectively, and then extend the other end of the optical fiber into a closed box of the same specification, and install the tail light, tail light and the other end of the optical fiber in the airtight box. One end coupling; Step 3. Adjust one of the optical fibers to an approximate non-bending state, and wind the remaining optical fibers through the tapered roller shaft (121) on the outer diameter adjustable winding roller (12), and the remaining optical fibers with different winding diameters different; Step 4. Install a luminance tester of the same specification in each airtight box, and test the luminance released by each optical fiber through the taillight, and finally obtain the luminance value; Step 5: Comparing the measured brightness values to obtain the loss of optical fiber lighting with the same specification at different bending degrees during transmission. 6. A photoelectric test early warning method according to claim 5, characterized in that, in step 3, the diameter of the optical fiber coil is in the range of 5cm-20cm. 7. A photoelectric test early warning method according to claim 6, characterized in that, in step 3, the number of turns of the optical fiber is 10-15 turns.

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