阅读说明：本技术 一种用于铁路大载荷动态称重计量的光纤传感器 (A kind of fibre optical sensor for railway big load dynamic weighting ) 是由 刘晓兵 庞湘生 王志强 付建明 郭超 秦根建 于 2019-06-28 设计创作，主要内容包括：本申请公开了一种用于铁路大载荷动态称重计量的光纤传感器,包括基板、光纤传感器组件,所述基板为具有一定厚度的长条形结构,用于贴合在铁轨底部,长条形的长度大于等于铁轨上两个枕木间的距离,长条形的宽度小于等于铁轨底部的宽度,所述光纤传感器组件设置在所述长条形的长边的侧面,所述光纤传感器组件包括弹性体、光纤敏感元件,所述光纤敏感元件设置在所述弹性体上。本申请的光纤传感器,能够方便地固定在铁轨的底部,实现对铁路大载荷动态称重计量。(This application discloses a kind of fibre optical sensors for railway big load dynamic weighting, including substrate, fibre optic sensor package, the substrate is with certain thickness string configuration, for being fitted in rail foot, the length of strip is more than or equal to the distance on rail between two sleepers, the width of strip is less than or equal to the width of rail foot, the side of the long side of the strip is arranged in the fibre optic sensor package, the fibre optic sensor package includes elastomer, optical fiber sensing element, and the optical fiber sensing element is arranged on the elastomer.The fibre optical sensor of the application can be conveniently fixed in the bottom of rail, realize to railway big load dynamic weighting.)

1. a kind of fibre optical sensor for railway big load dynamic weighting, it is characterised in that: including substrate, Fibre Optical Sensor Device assembly, the substrate are with certain thickness string configuration, and for being fitted in rail foot, the length of strip is greater than Equal to the distance between two sleepers on rail, the width of strip is less than or equal to the width of rail foot, the fibre optical sensor The side of the long side of the strip is arranged in component, and the fibre optic sensor package includes elastomer, optical fiber sensing element, institute Optical fiber sensing element is stated to be arranged on the elastomer.

2. fibre optical sensor according to claim 1, it is characterised in that: two sides of the substrate are symmetrical arranged There is the fibre optic sensor package.

3. fibre optical sensor according to claim 2, it is characterised in that: the optical fiber is arranged a side Sensor module, the fibre optic sensor package are located on the natural axis of the side and the intersection point of center line.

4. fibre optical sensor according to claim 2, it is characterised in that: two optical fiber are arranged a side Sensor module, the fibre optic sensor package are symmetricly set on the neutralization of the side using the center line of the side as axis On axis.

5. fibre optical sensor according to claim 1, it is characterised in that: the optical fiber sensing element is fixed in a linear fashion On the elastomer, the angle of the natural axis of the optical fiber sensing element and the side is 40 degree~50 degree, or is negative 40 Degree~50 degree minus, to form shearing detection mode.

6. fibre optical sensor according to claim 1, it is characterised in that: the thickness of the substrate is more than or equal to 30mm.

7. fibre optical sensor according to claim 1, it is characterised in that: in 100 tons of loads, the elastomer is length The steel alloy plate of 2cm~3.5cm, wide 3 mm~5mm, thickness 0.3mm~0.5mm.

8. fibre optical sensor according to claim 1, it is characterised in that: the length of the optical fiber sensing element is 1.0cm ~2.5cm, in the outer masterpiece used time, variation length is 2~6nm at full capacity.

9. fibre optical sensor according to claim 1, it is characterised in that: the both ends of the elastomer are provided with fixed base Plate is provided with symmetrical fixed point in the fixed substrate, for the elastomer is fixed on the substrate.

10. fibre optical sensor according to claim 1, it is characterised in that: the fibre optic sensor package is with embedded mode It being fixed on the side, the fibre optic sensor package surface is lower than the side surface, or maintains an equal level with the side surface, Matcoveredn is set on the fibre optic sensor package surface.

11. fibre optical sensor according to claim 1, it is characterised in that: the side is rectangle structure, or is type Shape structure.

12. fibre optical sensor according to claim 1, it is characterised in that: the substrate both ends are dovetail configuration, or are double Ear structure is provided with screw hole in dovetail part or ears portion.

13. a kind of fibre optical sensor, it is characterised in that: including fibre optic sensor package, fiber data Acquisition Instrument, the fiber count It is more than or equal to 1000 times/second according to the sample rate of Acquisition Instrument, minimum resolution 1PM, the fibre optic sensor package includes bullet Property body, optical fiber sensing element, the optical fiber sensing element is arranged on the elastomer.

Technical field

The present invention relates to Dynamic Weighing Technology fields, more particularly, to a kind of optical fiber for railway big load dynamic weighing Sensor.

Background technique

Optical fiber the same some characteristic-optical fiber that can change oneself after by environment and external force with other materials Wavelength changes on year-on-year basis with external influence.Using this property, optical fiber has been used to measurement temperature, the fields such as stress.

At present without beam type track scale and railway Super leaning load equipment generally use platen pressure sensor with directly on rail The mode that drilling installation shear force sensor combines, completes the measurement to railway carriage weight and vehicle cab recognition, but drill on rail It will have a direct impact on the intensity of rail；Although welding manner is avoided and is punched on rail, but because solder joint is minimum, want to work surface Ask extremely stringent --- it is required that welding surface is smooth such as mirror.There is no the time to carry out careful polishing work at construction of railways scene Make, thus live operability is not strong.

And since the dynamic measuring load on railway is big, impact force is big, and Impact direction is changeable, therefore, in precision prescribed Higher, the problem of railway dynamic weighing of fast speed measures aspect, is urgently to be resolved.

Summary of the invention

The purpose of the application is to provide a kind of fibre optical sensor for railway big load dynamic weighting, Fibre Optical Sensor The length of the substrate of device enables fibre optical sensor to be conveniently mounted to rail at a distance from being more than or equal between rail foot sleeper Between bottom and sleeper, the shearing signal that rail compressive deformation generates is transmitted on fibre optic sensor package, is realized to railway Big load dynamic weighting.

Foregoing invention purpose of the invention is achieved by the following technical programs:

A kind of fibre optical sensor for railway big load dynamic weighting, including substrate, fibre optic sensor package, institute Stating substrate is with certain thickness string configuration, and for being fitted in rail foot, the length of strip is more than or equal to rail Distance between upper two sleepers, the width of strip are less than or equal to the width of rail foot, the fibre optic sensor package setting In the side of the long side of the strip, the fibre optic sensor package includes elastomer, optical fiber sensing element, and the optical fiber is quick Sensing unit is arranged on the elastomer.

Foregoing invention purpose of the invention is also achieved by the following technical programs:

A kind of fibre optical sensor, including fibre optic sensor package, fiber data Acquisition Instrument, the fiber data Acquisition Instrument Sample rate is more than or equal to 1000 times/second, minimum resolution 1PM, and the fibre optic sensor package includes that elastomer, optical fiber are quick Sensing unit, the optical fiber sensing element are arranged on the elastomer.

The present invention is further arranged to: two sides of the substrate are symmetrically arranged with the fibre optical sensor group Part.

The present invention is further arranged to: a fibre optic sensor package, the optical fiber is arranged a side Sensor module is located on the natural axis of the side and the intersection point of center line.

The present invention is further arranged to: two fibre optic sensor packages, the optical fiber is arranged a side Sensor module is symmetricly set on the natural axis of the side using the center line of the side as axis.

The present invention is further arranged to: the optical fiber sensing element is fixed in a linear fashion on the elastomer, described The angle of the natural axis of optical fiber sensing element and the side is 40 degree~50 degree, or be negative 40 degree~it is 50 degree minus, cut with forming Power detection mode.

The present invention is further arranged to: the thickness of the substrate is more than or equal to 30mm.

The present invention is further arranged to: in 100 tons of loads, the elastomer be long 2cm~3.5cm, width 3mm~ The steel alloy plate of 5mm, thickness 0.3mm~0.5mm.

The present invention is further arranged to: the length of the optical fiber sensing element is 1.0cm~2.5cm, in the outer masterpiece used time Variation length is 2~6nm at full capacity.

The present invention is further arranged to: the both ends of the elastomer are provided with fixed substrate, are arranged in the fixed substrate There is symmetrical fixed point, for the elastomer is fixed on the substrate.

The present invention is further arranged to: the fibre optic sensor package is fixed on the side with embedded mode, described Fibre optic sensor package surface is lower than the side surface, or maintains an equal level with the side surface, in the fibre optic sensor package Matcoveredn is set on surface.

The present invention is further arranged to:: the side is rectangle structure, or is convex shape structure.

The present invention is further arranged to: the substrate both ends are dovetail configuration, or are ears structure, in dovetail part or ears Portion is provided with screw hole.

Compared with prior art, advantageous effects of the invention are as follows:

1. the fibre optical sensor of the application, the strip of substrate are matched with rail rail bottom, realize rail stress Deformation generate shearing information be transmitted to board-like fibre optical sensor, avoid steel rail web drilling caused by it is dangerous because Element；

2. further, fibre optic sensor package is sheared the side that substrate is arranged in detection mode by the application, accurately The stress for detecting rail realizes and a kind of new material-optical fiber is used to measure as sensing element railway big load；

3. further, the application uses fibre optic sensor package, Direct Digital output is realized, strong interference immunity passes The characteristics of defeated distance is remote, saves power saving.

Detailed description of the invention

Fig. 1 is the experimental configuration schematic diagram of optical fiber measurement of the invention.

Fig. 2,3,4 are the test data of experiment schematic diagrames of optical fiber measurement of the invention.

Fig. 5 is the structural schematic diagram of fibre optical sensor in a specific embodiment of the invention.

Fig. 6 is the structural schematic diagram of fibre optical sensor in another specific embodiment of the invention.

Fig. 7 is the structural schematic diagram of fibre optic sensor package in a specific embodiment of the invention.

Fig. 8 is the schematic side view of fibre optic sensor package in a specific embodiment of the invention.

Fig. 9 is fibre optical sensor output data waveform diagram in a specific embodiment of the invention.

Figure 10 is fibre optical sensor output data waveform diagram in another specific embodiment of the invention；

Figure 11 is substrate side surfaces structural schematic diagram in a specific embodiment of the invention；

Figure 12 is the structural schematic diagram that substrate is combined with rail in another specific embodiment of the invention.

Specific embodiment

Below in conjunction with attached drawing, invention is further described in detail.

In order to confirm that can fibre optical sensor meet the tendency of the dynamic weighing in rail, applicant carried out following experiments: such as Fig. 1 It is shown, in the two sides of the web of the rail of rail 6,3,4 points of optical fiber are welded in respectively on the natural axis of the experiment rail web of the rail, optical fiber is in It is in 45° angle between axis, forms the situation of test shearing strain, pressurizeed above rail with press machine 5, on rail of railway Same position, when applying different pressures, the output wavelength of fibre optical sensor, test data such as table 1:

Table 1:

Pressure (T)	0	1	2	3	4
						Sensor 3	1533.138	1533.273	1533.425	1533.579	1533.736
Sensor 4	1549.364	1549.51	1549.652	1549.792	1549.935
						Pressure (T)	5	6	7	8	9
Sensor 3	1533.898	1534.06	1534.226	1534.389	1534.553
						Sensor 4	1550.066	1550.198	1550.329	1550.458	1550.585
Pressure (T)	10	11	12	13	14
						Sensor 3	1534.713	1534.877	1535.042	1535.206	1535.375
Sensor 4	1550.712	1550.84	1550.964	1551.091	1551.22

Change pressure spot of the press machine on rail of railway, tested again, test result such as table 2:

Table 2:

As can be seen that optical fiber output variation is consistent in uniform pressure.

Using multifiber, taking multiple measurements, the relationship for measuring its output wavelength and pressure is as shown in Figure 2,3, 4, from As can be seen that using optical fiber measurement pressure, linearity R in figure²Reach 0.9999 or more, is highly suitable for measuring big load pressure And shearing.