Bare fiber strain-wavelength relation calibration device
By designing a bare optical fiber strain-wavelength relationship calibration device that includes a slide rail and an optical fiber fixing fixture, the problems of high cost and large calibration errors of existing optical fiber calibration devices are solved, and accurate and convenient calibration and protection of optical fibers are achieved.
Patent Information
- Application Number
- CN202421175103.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing optical fiber calibration devices have problems such as high development costs, inconvenient equipment, large calibration errors and easy fiber damage, making it difficult to achieve accurate and convenient optical fiber calibration.
A bare optical fiber strain-wavelength relationship calibration device is designed, including a main scale slide rail, a fixed slide block, a movable slide block, a limit slide block and an optical fiber fixing fixture. Through the cooperation of the slide block and the pull rope, the optical fiber can be Precise stretching and calibration.
The device realizes simple and accurate calibration of optical fibers, reduces the risk of optical fiber damage, improves the flexibility and convenience of the calibration process, reduces costs, and improves the accuracy of measurement.
Smart Images
Figure CN222353114U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bare optical fiber strain-wavelength relationship calibration device, and relates to the technical field of optical fiber grating calibration. Background Art
[0002] At present, when fiber Bragg gratings are used in various building structures for strain and temperature monitoring, especially in strain transfer tests, it is necessary to calibrate the wavelength-strain change ratio of the bare fiber. In actual measurement, the calibration data can be used as a reference to obtain more accurate structural strain. However, as a more precise measurement tool, fiber Bragg gratings are sensitive to force and easy to break, and have high requirements for test equipment. Due to its high development cost, there is no calibration equipment that matches the requirements on the market, so people often use a simple direct pulling method to calibrate the optical fiber; such a calibration method is not only difficult to obtain accurate data, but also directly pulling can easily cause the optical fiber to break and damage. Some testers calibrate by sticking it on the table and applying force, but this calibration method also has inconveniences. How to make an accurate and convenient optical fiber calibration device that can better protect the optical fiber and obtain more accurate data while saving costs has become an urgent problem to be solved.
[0003] In the existing optical fiber calibration device, the manufacturing process of the optical distance meter is relatively complicated, the manufacturing cost is high, and it is inconvenient to use. The traditional direct calibration method has the disadvantages of high optical fiber damage rate and large measurement error. Utility Model Content
[0004] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a bare optical fiber strain-wavelength relationship calibration device.
[0005] In order to solve the above technical problems, the technical solution of the utility model is: a bare optical fiber strain-wavelength relationship calibration device, comprising a slide rail with main scale lines, on which a fixed slider, a movable slider and a limit slider are sequentially arranged, and the fixed slider, the movable slider and the limit slider are all threaded with set screws, and the movable slider is provided with vernier scale lines, and the fixed slider and the movable slider are provided with optical fiber fixing clamps, and the movable slider is pulled toward the end side of the limit slider by a pull rope, and the other end of the pull rope is connected to a weight.
[0006] Preferably, the slide rail is fixedly arranged on the top surface of the bottom plate, and the main scale line is arranged on the top surface of the bottom plate beside the slide rail.
[0007] Preferably, the set screws are all threadedly connected to the side surfaces of the fixed slider, the movable slider and the limit slider.
[0008] Preferably, a limiting flange is coaxially fixed on the slide rail between the movable slide block and the limiting slide block.
[0009] Preferably, the vernier scale line is arranged on the bottom edge of the side of the movable slider close to the main scale line.
[0010] Preferably, the optical fiber fixing clamps include screws threaded on the top surfaces of the fixed slider and the movable slider, the top of the screws are fixed with a U-shaped iron clamp with an opening facing upward, and the U-shaped iron clamps are fixed with rubber pads on both inner sides of the U-shaped opening.
[0011] Preferably, a vertical rod is fixedly connected to the top surface of the limit slider, a horizontal rod is fixedly connected to the end surface of the slide rail close to the limit slider, and winding coils are fixedly provided at the outer ends of the vertical rod and the horizontal rod.
[0012] Preferably, the other end of the pull rope passes through the winding coil of the vertical pole and the winding coil of the horizontal pole in sequence, then extends downward and is connected to a hooked weight.
[0013] Preferably, the draw rope is tied to the screw rod.
[0014] Preferably, the drawstring is a nylon rope.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] The present invention solves the problems of lack of special calibration device, inconvenient force on optical fiber, large calibration error and so on in the optical fiber calibration process. The traditional optical fiber calibration method is very easy to cause the optical fiber to break and damage, and it is impossible to accurately measure the force. The device realizes the possibility of simple and accurate calibration of optical fiber, which greatly increases the flexibility and convenience compared with other equipment and test methods.
[0017] The slider of the present invention, which carries the fixing, force transmission and distance measurement device used for optical fiber calibration, can be directly slidably placed on the slide rail and can be made immovable by tightening the fixing screw, so that the position of the slider can be adjusted at any time according to the length of the optical fiber.
[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The structure of the embodiment of the utility model is shown in FIG. Figure 1 .
[0020] Figure 2 The structure of the embodiment of the utility model is shown in FIG. Figure 2 .
[0021] Figure 3 Schematic diagram of the structure of the optical fiber fixing fixture.
[0022] Figure 4 This is a schematic diagram of the structure of the weight hook.
[0023] Figure 5 Schematic diagram of the structure of the weight. DETAILED DESCRIPTION
[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0025] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.
[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0027] like Figures 1 to 5 As shown, this embodiment provides a bare optical fiber strain-wavelength relationship calibration device, including a slide rail 2 provided with a main scale line 1, on which a fixed slider 3, a movable slider 4, and a limit slider 5 are sequentially provided, and the fixed slider, the movable slider, and the limit slider are all threaded with set screws 6, and the movable slider is provided with a vernier scale line 7, and the fixed slider and the movable slider are provided with an optical fiber fixing clamp 8, and the movable slider is pulled toward the end side of the limit slider by a pull rope 9, and the other end of the pull rope is connected to a weight 10.
[0028] In the embodiment of the utility model, the slide rail is fixedly arranged on the top surface of the bottom plate 11, and the main scale line is arranged on the top surface of the bottom plate beside the slide rail.
[0029] In the embodiment of the utility model, the set screws are all screwed on the side surfaces of the fixed slider, the movable slider and the limit slider.
[0030] In the embodiment of the utility model, a limiting flange 12 is coaxially fixed on the slide rail between the movable slide block and the limiting slide block to prevent the movable slide block and the limiting slide block from colliding with each other.
[0031] In an embodiment of the utility model, the vernier scale line is arranged on the bottom edge of the side of the movable slider close to the main scale line.
[0032] In the embodiments of the utility model, the optical fiber fixing clamp includes a screw 13 threadedly connected to the top surface of the fixed slider and the movable slider, and the top of the screw is fixed with a U-shaped iron clamp 14 with an opening facing upward, and the U-shaped iron clamp is fixed with rubber pads 15 on the two inner sides of the U-shaped opening. The optical fiber is clamped between the two rubber pads to prevent the optical fiber from being broken by the sharp metal part of the clamp.
[0033] In the embodiment of the utility model, a vertical rod 16 is fixedly connected to the top surface of the limit slider, a horizontal rod 17 is fixedly connected to the end surface of the slide rail close to the limit slider, and a winding coil 18 is fixedly provided at the outer ends of the vertical rod and the horizontal rod.
[0034] In the embodiment of the utility model, the other end of the pull rope passes through the winding coil of the vertical pole and the winding coil of the horizontal pole in sequence, then extends downward and is connected to a hook weight, which is composed of a hook weight seat 19 and a weight.
[0035] In the embodiment of the utility model, the draw rope is tied to the screw rod.
[0036] In the embodiment of the utility model, the pull rope is a nylon rope. The pull rope used in the present invention can refer to the use of nylon wire, and the pull rope can be wound around the coil as a fulcrum after being wound around the coil.
[0037] In an embodiment of the utility model, the optical fiber 20 can be installed and straightened through the optical fiber fixing clamps that have been fixed on the movable slider and the fixed slider respectively; the optical fiber fixing clamp is made of metal, and a rubber pad is installed in the clamp to prevent the optical fiber from being brittlely broken by force; the movable slider can move back and forth horizontally and linearly on the entire slide rail; the limit slider itself is not movable, and the winding coil on it serves as the fulcrum of the pull rope, one end of the pull rope (nylon rope) is connected to the movable slider, and the other end is connected to the weight. By adding a fixed weight, a specific force can be transmitted to the movable slider, and thus to the straightened optical fiber; the main scale lines and the vernier scale lines are convenient for reading.
[0038] In the embodiment of the utility model, the working principle of the bare optical fiber strain-wavelength relationship calibration device is as follows: the fixed slider, the movable slider, and the limit slider are installed on the slide rail, and the limit slider and the fixed slider are fixed and cannot be moved by tightening the set screws. Then, the optical fiber fixing fixture is installed on the movable slider and the fixed slider respectively, and the optical fiber is fixed and straightened by the optical fiber fixing fixture to make it become a state that can withstand force. The pull rope passes through the winding coil, and the movable slider and the weight are connected respectively, so that when the weight of the fixed weight is added to the hook weight seat, the corresponding force can also be transmitted to the pull rope of the movable slider, so that the movable slider slides, and the optical fiber will be pulled with its movement and subjected to the same tension. After each weight is added, the distance moved by the movable slider, that is, the change in the length of the optical fiber, can be directly read through the vernier scale. By continuously changing the weight of the weight, recording and analyzing the change in the wavelength and length of the optical fiber, the calibration of the optical fiber can be completed. When the length of the clamped optical fiber needs to be adjusted, the set screw that fixes the slider can be turned to make the slider movable; when it is moved to the position required for clamping the optical fiber, the set screw can be turned to fix it again.
[0039] The weights are 5g, 10g, 20g, 50g, 100g, and 200g, and the weight of the hooked weight holder is 10g. By gradually adding weights to the hooked weight holder, the force on the optical fiber can be calibrated from 0 to 400g. Considering that the optical fiber is relatively fragile, a set of 300g weights is generally prepared as the upper limit of its force.
[0040] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.
Claims
1. A bare optical fiber strain-wavelength relationship calibration device, characterized in that: It comprises a slide rail with main scale lines, on which a fixed slider, a movable slider and a limit slider are sequentially arranged, the fixed slider, the movable slider and the limit slider are all threaded with set screws, the movable slider is provided with vernier scale lines, the fixed slider and the movable slider are provided with optical fiber fixing clamps, the movable slider is pulled toward the end side of the limit slider by a pull rope, and the other end of the pull rope is connected to a weight.
2. The bare optical fiber strain-wavelength relationship calibration device according to claim 1, characterized in that: The slide rail is fixedly arranged on the top surface of the bottom plate, and the main scale line is arranged on the top surface of the bottom plate beside the slide rail.
3. The bare optical fiber strain-wavelength relationship calibration device according to claim 1, characterized in that: The set screws are all threadedly connected to the side surfaces of the fixed slider, the movable slider and the limit slider.
4. The bare optical fiber strain-wavelength relationship calibration device according to claim 1, characterized in that: A limiting flange is coaxially fixed on the slide rail between the movable slide block and the limiting slide block.
5. The bare optical fiber strain-wavelength relationship calibration device according to claim 1, characterized in that: The vernier scale line is arranged on the movable slider near the side bottom edge of the main scale line.
6. The bare optical fiber strain-wavelength relationship calibration device according to claim 1, characterized in that: The optical fiber fixing clamps all include screws threaded on the top surfaces of the fixed slider and the movable slider, the top of the screws are all fixed with U-shaped iron clamps with openings facing upwards, and the U-shaped iron clamps are all fixed with rubber pads on the two inner sides of the U-shaped openings.
7. The bare optical fiber strain-wavelength relationship calibration device according to claim 1, characterized in that: The top surface of the limit slider is fixedly connected with a vertical rod, the end surface of the slide rail close to the limit slider is fixedly connected with a horizontal rod, and the outer ends of the vertical rod and the horizontal rod are fixedly provided with winding coils.
8. The bare optical fiber strain-wavelength relationship calibration device according to claim 7, characterized in that: The other end of the pull rope passes through the winding coil of the vertical pole and the winding coil of the horizontal pole in sequence, then extends downward and is connected with a hook weight.
9. The bare optical fiber strain-wavelength relationship calibration device according to claim 6, characterized in that: The draw rope is tied to the screw rod.
10. The bare optical fiber strain-wavelength relationship calibration device according to claim 1, characterized in that: The drawstring is a nylon rope.