Track detection device based on fiber bragg grating

Abstract

The utility model provides a track detection device based on fiber bragg gratings, and relates to the technical field of fiber bragg grating track detection. The track detection device comprises a plurality of sleeper bodies, and track bodies are fixedly connected to the two sides of the tops of the sleeper bodies. In the using process, when a train travels above the track body, acting force can be transmitted to the sleeper body through the track, the sleeper body vibrates after being stressed, the connecting sleeve on the upper surface of the installation base plate moves synchronously, extrudes or stretches the three buffering assemblies, the damper and the spring are compressed or extended, kinetic energy is absorbed, and buffering is provided. The vibration of the track main body is prevented from generating instantaneous stress and deformation on the fiber bragg grating to cause the change of the reflection wavelength, the dynamic disturbance caused by the vibration is reduced, the change of the frequency, amplitude and the like of the vibration can cause the nonlinear change of the reflection wavelength, and the measurement precision of the sensor is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fiber grating track detection, especially to a track detection device based on fiber grating. BACKGROUND

[0002] The track is the necessary driving lane for the train and the special train such as high-speed rail, and the track has the standardized foundation strength and the horizontal height, and the sleeper is installed on the accurate bottom surface to support the track for the train and the high-speed rail, ensure that the track has the high-strength support foundation and the most stable support point, ensure that the train and the high-speed rail have the most safe driving environment under the high-speed driving, and the track monitoring device based on fiber grating sensing is disclosed in Chinese patent application No.

[0003] However, in the above technical scheme, the outer surface of the reinforcing sleeve is attached and slides in the inner wall of the fiber grating tube, and the inner core is bonded and fixed with the reinforcing sleeve, and the inner core is rigidly connected with the inner wall of the fiber grating tube, when the train passes, the vibration of the track will cause instantaneous stress and deformation to the fiber grating, resulting in changes in the reflected wavelength, this change not only comes from the real deformation of the track, but also may be caused by dynamic disturbance due to vibration, the frequency, amplitude and other changes of vibration will cause nonlinear changes of the reflected wavelength, affect the measurement accuracy of the sensor, and have defects. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the technical problems in the above technical scheme that the outer surface of the reinforcing sleeve is attached and slides in the inner wall of the fiber grating tube, and the inner core is bonded and fixed with the reinforcing sleeve, and the inner core is rigidly connected with the inner wall of the fiber grating tube, when the train passes, the vibration of the track will cause instantaneous stress and deformation to the fiber grating, resulting in changes in the reflected wavelength, this change not only comes from the real deformation of the track, but also may be caused by dynamic disturbance due to vibration, the frequency, amplitude and other changes of vibration will cause nonlinear changes of the reflected wavelength, affect the measurement accuracy of the sensor, and have defects, and proposes a track detection device based on fiber grating.

[0005] In order to achieve the above object, the utility model discloses the following technical scheme: a track detection device based on optical fiber grating, including the sleeper main part, the sleeper main part is provided with a plurality of, the top both sides of a plurality of sleeper main part are fixedly connected with track main body, the upper surface of a plurality of sleeper main body is all fixedly connected with the mounting base plate, the upper surface of a plurality of mounting base plate is all fixedly connected with the connecting sleeve, the inner wall surface of a plurality of connecting sleeve is all fixedly connected with three buffer assemblies, the buffer assembly includes the connecting block, the connecting block is provided with two, the opposite surface of two connecting blocks is embedded with ball, the opposite surface of two ball is fixedly connected with damper, the opposite surface of two ball is still fixedly connected with spring, wherein the outer surface of one connecting block is provided with recess, the inside of recess is provided with inner core.

[0006] Further, three buffer assemblies are arranged in a circle, and three buffer assemblies are distributed equidistantly.

[0007] Further, the inner wall surface of the spring is sleeved on the outer surface of the damper.

[0008] Further, the outer surface of the inner core is sleeved with a protective tube.

[0009] Further, the outer surface of the protective tube is fixedly connected to the inside of the recess.

[0010] Further, a plurality of connecting sleeves are located at the center of the upper surface of the corresponding sleeper main body.

[0011] Compared with the prior art, the utility model has the advantages and positive effects that,

[0012] 1、In the utility model, during use, when the train drives above the track main body, the force is transmitted to the sleeper main body through the track, the sleeper main body vibrates after being stressed, the mounting base plate upper surface connecting sleeve moves synchronously, extrudes or stretches three buffer assemblies, the buffer assembly is stressed, two ball blocks rotate in the inside of two connecting blocks along the stress direction, and extrudes the damper and spring through two ball blocks, the damper and spring are compressed or extended, absorb kinetic energy, provide buffering, avoid the vibration of the track main body to produce instantaneous stress and deformation to the optical fiber grating, cause the change of reflected wavelength, reduce the dynamic disturbance caused by vibration, and the change of vibration frequency, amplitude, etc. Nonlinear change of reflected wavelength, guarantee the measurement accuracy of sensor.

[0013] 2、The utility model discloses a buffer assembly is distributed according to the circumference equidistance, and each buffer assembly will bear the vibration or impact from different directions evenly, ensure that vibration energy is transmitted and is balancedly absorbed in each direction, avoid the buffer of a direction to be excessive and the buffer of another direction to be insufficient, guarantee the buffering effect, and the structure of the circumference arrangement can avoid that a part is subjected to excessive stress, and also ensure that the shock absorption effect of each part of the system remains consistent, thereby providing more stable performance, the travel of damper limiting spring is avoided, spring bending deformation is avoided, normal work of spring is guaranteed, the protection pipe is covered outside the inner core, provides physical protection for the inner core to prevent the inner core from being damaged by external environment, and the connecting sleeve is symmetrically arranged to ensure balanced stress. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A three-dimensional structural schematic view of a track detection device based on fiber grating is provided for the utility model;

[0015] Figure 2 A three-dimensional structural schematic view of a connecting sleeve of a track detection device based on fiber grating is provided for the utility model;

[0016] Figure 3 A three-dimensional structural schematic view of a buffer assembly of a track detection device based on fiber grating is provided for the utility model;

[0017] Figure 4 A sectional three-dimensional structural schematic view of a buffer assembly of a track detection device based on fiber grating is provided for the utility model.

[0018] Legend: 1, sleeper main body, 2, track main body, 3, installation base plate, 4, connecting sleeve, 5, protection pipe, 6, inner core, 7, buffer assembly, 701, connecting block, 702, ball block, 703, damper, 704, spring, 705, recess. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Embodiment 1

[0021] As Figures 1-4As shown, this utility model provides a technical solution: a track detection device based on fiber optic grating, including a sleeper body 1, multiple sleeper bodies 1 are provided, track bodies 2 are fixedly connected to the top two sides of the multiple sleeper bodies 1, mounting base plates 3 are fixedly connected to the upper surfaces of the multiple sleeper bodies 1, connecting sleeves 4 are fixedly connected to the upper surfaces of the multiple mounting base plates 3, and three buffer components 7 are fixedly connected to the inner wall surfaces of the multiple connecting sleeves 4. The buffer component 7 includes a connecting block 701, two connecting blocks 701 are provided, ball blocks 702 are embedded in the opposite surfaces of the two connecting blocks 701, dampers 703 are fixedly connected to the opposite surfaces of the two ball blocks 702, and springs 704 are also fixedly connected to the opposite surfaces of the two ball blocks 702. A groove 705 is opened on the outer surface of one of the connecting blocks 701, and an inner core 6 is provided inside the groove 705.

[0022] In this embodiment, during use, when the train travels above the track body 2, the force is transmitted to the sleeper body 1 through the track. The sleeper body 1 vibrates after being subjected to force, causing the connecting sleeve 4 on the upper surface of the mounting base plate 3 to move synchronously, squeezing or stretching the three buffer components 7. After being subjected to force, the buffer components 7 rotate inside the two connecting blocks 701 through two ball blocks 702 following the direction of the force, and squeeze the damper 703 and spring 704 through the two ball blocks 702. The damper 703 and spring 704 compress or extend their stroke, absorb kinetic energy, provide buffering, and avoid the vibration of the track body 2 from causing instantaneous stress and deformation to the fiber optic grating, which would cause changes in the reflected wavelength, reduce the dynamic disturbance caused by vibration, and ensure the measurement accuracy of the sensor by causing nonlinear changes in the frequency and amplitude of vibration.

[0023] Example 2

[0024] like Figures 1-4 As shown, the three buffer components 7 are arranged in a circle and are equidistantly distributed. The inner wall surface of the spring 704 is sleeved on the outer surface of the damper 703. The outer surface of the inner core 6 is sleeved with a protective tube 5. The outer surface of the protective tube 5 is fixedly connected to the inside of the groove 705. Multiple connecting sleeves 4 are located at the center of the upper surface of the corresponding sleeper body 1.

[0025] In the embodiment, the buffer assemblies 7 are distributed equidistantly in a circle, each buffer assembly 7 uniformly bears the vibration or impact from different directions, ensures the vibration energy to be transmitted and uniformly absorbed in each direction, avoids the over-buffering in a direction and the insufficient buffering in another direction, guarantees the buffering effect, the structure arranged in a circle can avoid a part to bear too much stress, and also ensures the damping effects of each part of the system to be consistent, thereby providing more stable performance, the damper 703 limits the stroke of the spring 704, avoids the spring 704 to be bent and deformed, guarantees the normal work of the spring 704, the protection tube 5 is coated outside the inner core 6, provides physical protection for the inner core 6, and prevents the inner core 6 from being damaged by the external environment, the connecting sleeve 4 is symmetrically arranged, to ensure balanced stress.

[0026] Working principle: as shown in Figures 1-4 the figure, in use, when the train travels above the track body 2, the force is transmitted to the sleeper body 1 through the track, the sleeper body 1 vibrates after being stressed, the connecting sleeve 4 on the upper surface of the installation base plate 3 moves synchronously, extrudes or stretches the three buffer assemblies 7, the buffer assemblies 7 rotate in the interiors of the two connecting blocks 701 along the stress direction through the two ball blocks 702 after being stressed, and extrude the damper 703 and the spring 704 through the two ball blocks 702, the damper 703 and the spring 704 are compressed or extended in stroke, avoid the vibration of the track body 2 to produce instantaneous stress and deformation on the fiber grating, causes the reflected wavelength to change, the buffer assemblies 7 are distributed equidistantly in a circle, each buffer assembly 7 uniformly bears the vibration or impact from different directions, the structure arranged in a circle can avoid a part to bear too much stress, and also ensures the damping effects of each part of the system to be consistent, thereby providing more stable performance, the damper 703 limits the stroke of the spring 704, avoids the spring 704 to be bent and deformed, guarantees the normal work of the spring 704, the protection tube 5 is coated outside the inner core 6, provides physical protection for the inner core 6, and prevents the inner core 6 from being damaged by the external environment, the connecting sleeve 4 is symmetrically arranged, to ensure balanced stress.

[0027] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms, any skilled person in the art can change or modify the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A fiber grating based track detection device comprising a sleeper body (1), characterized in that: The tie main body (1) is provided with a plurality of, the top of a plurality of tie main body (1) both sides are fixedly connected with track main body (2), a plurality of tie main body (1) upper surface is fixedly connected with installation base plate (3), a plurality of installation base plate (3) upper surface is fixedly connected with connecting sleeve (4), a plurality of connecting sleeve (4) inner wall surface is fixedly connected with three buffer assembly (7), the buffer assembly (7) includes connecting block (701), the connecting block (701) is provided with two, two connecting block (701) opposite surface is embedded with ball (702), two ball (702) opposite surface is fixedly connected with damper (703), two ball (702) opposite surface is also fixedly connected with spring (704), wherein one connecting block (701) outer surface is provided with recess (705), the recess (705) is provided with inner core (6) inside.

2. The fiber grating based track detection apparatus according to claim 1, wherein: Three buffer assembly (7) is arranged in a circle, three buffer assembly (7) equidistant distribution.

3. The fiber grating based track detection apparatus of claim 1, wherein: The inner wall surface of the spring (704) is sleeved on the outer surface of the damper (703).

4. A fiber grating based track detection apparatus as claimed in claim 3, characterized in that: The outer surface of the inner core (6) is sleeved with a protective tube (5).

5. A fiber grating based track detection apparatus as claimed in claim 4, characterized in that: The outer surface of the protective tube (5) is fixedly connected to the inside of the recess (705).

6. The fiber grating based track detection apparatus of claim 1, wherein: A plurality of connecting sleeve (4) are located at the center of the upper surface of the corresponding tie main body (1).

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