CN102733272B - Steel rail detection method, system and terminal - Google Patents
Steel rail detection method, system and terminal Download PDFInfo
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- CN102733272B CN102733272B CN201210173479.XA CN201210173479A CN102733272B CN 102733272 B CN102733272 B CN 102733272B CN 201210173479 A CN201210173479 A CN 201210173479A CN 102733272 B CN102733272 B CN 102733272B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 238
- 239000010959 steel Substances 0.000 title claims abstract description 238
- 238000001514 detection method Methods 0.000 title claims abstract description 116
- 239000000835 fiber Substances 0.000 claims description 50
- 230000007935 neutral effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 2
- 239000010432 diamond Substances 0.000 claims description 2
- 230000002277 temperature effect Effects 0.000 abstract description 4
- 230000002457 bidirectional effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention relates to the field of railways, particularly a steel rail detection method, system and terminal which can detect longitudinal force of a steel rail. The steel rail detection method comprises the following steps: acquiring temperature strain of the steel rail generated in the direction orthogonal to the longitudinal direction of the steel rail under the temperature effect by using the detection terminal; using the temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail as the temperature strain in the longitudinal direction of the steel rail; acquiring basic temperature force borne by the steel rail in the longitudinal direction according to the temperature strain in the longitudinal direction of the steel rail; acquiring additional strain of the steel rail generated in the longitudinal direction under the action of outside additional force by using the detection terminal; acquiring the additional force borne by the steel rail in the longitudinal direction according to the additional strain; and acquiring the longitudinal force of the steel rail according the basic temperature force and additional force borne by the steel rail in the longitudinal direction.
Description
Technical Field
The invention relates to the field of railways, in particular to a steel rail detection method, a steel rail detection system and a steel rail detection terminal.
Background
In order to ensure proper use of the rail, it is often necessary to detect the longitudinal forces to which the rail is subjected in the longitudinal direction (longitudinal direction, i.e. the length direction along which the rail extends along the track), including: the basic temperature force that the rail is subjected to in the longitudinal direction under the action of temperature, and the additional force that the rail is subjected to in the longitudinal direction under the action of external additional force (such as braking, bending and other additional forces).
The traditional rail that detects adopts the resistance strain gauge, however the resistance strain gauge is anticorrosive not, is more easily impaired when arranging external environment in for a long time, and receives electromagnetic interference easily, and the drift of zero point of resistance strain gauge is comparatively general simultaneously, when the staff need detect the longitudinal force of rail through this resistance strain gauge, must clear zero earlier to it can't detect for a long time, often uses already.
At present, when the steel rail of a seamless line fixing area part is detected, a fiber grating sensor based on a one-way strain detection technology is generally adopted, the defect of a resistance strain gauge is overcome, and the fiber grating sensor is suitable for long-time large-scale use. The specific detection method is that a fiber grating sensor based on the unidirectional strain detection technology is pasted along the longitudinal direction of the steel rail, and when the steel rail is locally strained in the longitudinal direction, the strain locally generated by the steel rail can be detected through the sensor due to the external additional force. However, since the rails are restrained by the fasteners and the like in the longitudinal direction, although the rails are subjected to the basic temperature force in the longitudinal direction, the basic temperature forces are balanced with each other on the rails at the fixing area portion, and therefore the basic temperature force does not generate the temperature strain in the longitudinal direction of the rails, and therefore the temperature strain cannot be detected by the detection method, and the basic temperature force which is subjected to the longitudinal direction of the rails cannot be obtained.
Since the basic temperature force in the longitudinal direction of the rail cannot be detected, the longitudinal force of the rail cannot be obtained from the basic temperature force in the longitudinal direction of the rail and the additional force applied in the longitudinal direction.
Disclosure of Invention
The invention provides a steel rail detection method, a steel rail detection system and a steel rail detection terminal, which can detect the longitudinal force of a steel rail.
In order to achieve the above object, the technical solution of the present invention is achieved,
the steel rail detection method comprises the following steps:
acquiring temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail under the temperature action of the steel rail through a detection terminal;
taking the temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail as the temperature strain in the longitudinal direction of the steel rail; obtaining basic temperature force borne by the steel rail in the longitudinal direction according to the temperature strain of the steel rail in the longitudinal direction;
acquiring additional strain of the steel rail in the longitudinal direction under the action of external additional force by the detection terminal;
obtaining the additional force borne by the steel rail in the longitudinal direction according to the additional strain;
and obtaining the longitudinal force of the steel rail according to the basic temperature force and the additional force born by the steel rail in the longitudinal direction.
Preferably, the acquiring, by the detection terminal, the temperature strain of the steel rail generated in a direction orthogonal to the longitudinal direction of the steel rail under the action of temperature includes:
mounting the detection terminal on the lateral waist of the steel rail along the neutral axis of the steel rail;
the temperature strain generated in the vertical direction of the steel rail under the temperature action is obtained through the detection terminal, and the vertical direction and the longitudinal direction are in an orthogonal relation.
Preferably, the acquiring, by the detection terminal, the temperature strain of the steel rail generated in a direction orthogonal to the longitudinal direction of the steel rail under the action of temperature includes:
mounting the detection terminal at the bottom of the steel rail along the neutral axis of the steel rail;
and acquiring the temperature strain of the steel rail generated in the transverse direction under the temperature action by the detection terminal, wherein the transverse direction and the longitudinal direction are in an orthogonal relation.
Preferably, the detection terminal acquires the temperature strain and the additional strain through a fiber grating.
Preferably, the first and second electrodes are formed of a metal,
four optical fiber gratings distributed in a diamond shape are arranged in the detection terminal, and the temperature strain and the additional strain are obtained through a full-bridge orthogonal form formed by the four optical fiber gratings; further, one of the diagonals of the rhombus is distributed along the neutral axis of the rail;
or,
two optical fiber gratings distributed in a cross shape are arranged in the detection terminal, and the temperature strain and the additional strain are obtained through the two optical fiber gratings respectively; further, one of the fiber gratings is distributed along the neutral axis of the steel rail.
Preferably, the obtaining of the basic temperature force borne by the steel rail in the longitudinal direction according to the temperature strain of the steel rail in the longitudinal direction comprises:
and obtaining the basic temperature force born by the steel rail in the longitudinal direction according to the temperature strain of the steel rail in the longitudinal direction and the area of the longitudinal section of the steel rail.
The invention also provides a detection terminal, comprising:
the first acquisition module is used for acquiring temperature strain generated in the direction which is orthogonal to the longitudinal direction of the steel rail under the action of temperature;
and the second acquisition module is used for acquiring additional strain generated in the longitudinal direction of the steel rail under the action of external additional force.
Preferably, the first obtaining module includes:
and the vertical acquisition submodule is used for acquiring the temperature strain generated in the vertical direction of the steel rail under the temperature action of the steel rail.
Preferably, the first obtaining module includes:
and the transverse acquisition submodule is used for acquiring the temperature strain generated in the transverse direction of the steel rail under the temperature action of the steel rail.
The invention also provides a steel rail detection system, which comprises a detection terminal and a processing terminal,
the detection terminal is used for acquiring temperature strain generated in the direction which is orthogonal to the longitudinal direction of the steel rail under the temperature action of the steel rail;
acquiring additional strain generated in the longitudinal direction of the steel rail under the action of external additional force of the steel rail;
the processing terminal is used for taking the temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail as the temperature strain of the longitudinal direction of the steel rail; obtaining basic temperature force borne by the steel rail in the longitudinal direction according to the temperature strain of the steel rail in the longitudinal direction;
obtaining the additional force borne by the steel rail in the longitudinal direction according to the additional strain;
and obtaining the longitudinal force of the steel rail according to the basic temperature force and the additional force born by the steel rail in the longitudinal direction.
Compared with the prior art, the steel rail detection method, the steel rail detection system and the detection terminal provided by the invention have the advantages that the temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail under the action of temperature is detected through the detection terminal, the basic temperature force borne by the steel rail in the longitudinal direction does not generate strain in the longitudinal direction of the steel rail but is converted into the internal force of the steel rail, the temperature strain at each point in the steel rail is the same, the basic temperature force borne by the steel rail in the longitudinal direction can be obtained through calculation according to the detected temperature strain, the strain generated by the steel rail in the longitudinal direction under the action of the external additional force is obtained through the detection terminal, the additional force borne by the steel rail in the longitudinal direction is further obtained, and the longitudinal force of the steel rail can be obtained according to the basic temperature force and the additional force.
In addition, the steel rail detection method, the steel rail detection system and the steel rail detection terminal provided by the invention can achieve the following positive effects:
1. the detection terminal is arranged on the side waist of the steel rail, so that the temperature strain of the steel rail in the vertical direction under the action of temperature and the additional strain of the steel rail in the longitudinal direction under the action of external additional force can be obtained, the strains of the steel rail in the longitudinal direction and the vertical direction are respectively obtained, and the bidirectional strain detection is realized;
2. the detection terminal is arranged at the bottom of the steel rail, so that the temperature strain of the steel rail in the transverse direction under the action of temperature and the additional strain of the steel rail in the longitudinal direction under the action of external additional force can be obtained, the strains of the steel rail in the longitudinal direction and the transverse direction are respectively obtained, and the bidirectional strain detection is realized;
3. because be provided with a plurality of fiber grating in this detection terminal to acquire temperature strain and additional strain through this fiber grating, be different from the mode that adopts resistance strain gauge to detect the rail among the prior art, because resistance strain gauge is anticorrosive, be more fragile when placing external environment for a long time in, and receive electromagnetic interference easily, the drift of zero point of resistance strain gauge is comparatively general simultaneously, when the staff need be through this resistance strain becomes the longitudinal force that detects the rail that becomes flat, must reset earlier to it, thereby can't detect for a long time. The fiber bragg grating adopted by the invention is not easily interfered by the external severe environment, so that the long-term detection of the steel rail can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart of a rail detection method according to an embodiment of the present invention;
fig. 2 is a flowchart of another rail detection method according to a second embodiment of the present invention;
fig. 3 is a wiring diagram in the detection terminal according to the second embodiment of the present invention;
fig. 4 is another wiring diagram in the detection terminal according to the second embodiment of the present invention;
fig. 5 is a block diagram of a detection terminal according to a third embodiment of the present invention;
fig. 6 is a block diagram of another detection terminal according to a fourth embodiment of the present invention;
fig. 7 is a block diagram of a rail detection system according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The first embodiment of the present invention provides a method for detecting a steel rail, which is shown in fig. 1 and includes:
step S101: acquiring temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail under the temperature action of the steel rail through a detection terminal;
step S102: taking the temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail as the temperature strain in the longitudinal direction of the steel rail; obtaining basic temperature force borne by the steel rail in the longitudinal direction according to the temperature strain of the steel rail in the longitudinal direction;
step S103: acquiring additional strain of the steel rail in the longitudinal direction under the action of external additional force by the detection terminal;
step S104: obtaining the additional force borne by the steel rail in the longitudinal direction according to the longitudinal strain;
step S105: and obtaining the longitudinal force of the steel rail according to the basic temperature force and the additional force born by the steel rail in the longitudinal direction.
According to the steel rail detection method provided by the embodiment of the invention, the temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail under the action of temperature is detected through the detection terminal, because the basic temperature force borne by the steel rail in the longitudinal direction does not generate strain in the longitudinal direction of the steel rail, but is converted into the internal force of the steel rail, the temperature strain at each point in the steel rail is the same, the basic temperature force borne by the steel rail in the longitudinal direction can be calculated according to the detected temperature strain, the strain generated by the steel rail in the longitudinal direction under the action of external additional force is obtained through the detection terminal, the additional force borne by the steel rail in the longitudinal direction is further calculated, and the basic temperature force and the additional force are processed to obtain the longitudinal force of the steel rail. Thus, the basic temperature force borne by the steel rail in the longitudinal direction can be measured, and the longitudinal force of the steel rail can be further obtained.
Example two
In the second embodiment of the present invention, taking the fixed area on the jointless track as an example, another rail detecting method is provided, which detects the longitudinal force of the rail in the fixed area. In the method, preferably, the detection terminal is a fiber grating sensor based on a bidirectional strain detection technology. Referring to fig. 2, comprising:
step 201: mounting the detection terminal on the lateral waist of the steel rail along the neutral axis of the steel rail;
preferably, in this embodiment, a longitudinal fiber grating and a vertical fiber grating are disposed in the detection terminal, and the longitudinal direction is a length direction of the steel rail extending along the line; vertical, i.e. the direction perpendicular to the ground, i.e. the height direction of the rail;
step 202: acquiring temperature strain of the steel rail in the vertical direction under the temperature action through the vertical fiber bragg grating in the detection terminal;
in this embodiment, the vertical direction is orthogonal to the longitudinal direction; the steel rail is not restrained by fasteners and the like in the vertical direction and is in a free state, so that under the action of temperature, the steel rail generates temperature strain in the vertical direction due to expansion with heat and contraction with cold;
further, step 210 and step 202 may be replaced with step 201 'and step 202':
step 201': installing a detection terminal at the bottom of the steel rail along a neutral axis of the steel rail;
step 202': acquiring temperature strain of the steel rail in the transverse direction under the temperature action through the transverse fiber bragg grating in the detection terminal;
specifically, in the present embodiment, the lateral direction, i.e., the width direction of the rail;
the transverse direction is orthogonal to the longitudinal direction; the steel rail is not restrained by fasteners and the like in the transverse direction and is in a free state, so that under the action of temperature, the steel rail generates temperature strain in the transverse direction due to expansion with heat and contraction with cold;
step 203: measuring the area of the longitudinal section of the steel rail in advance;
in this embodiment, step 203 may be performed at any position before step 204;
step 204: the obtained temperature strain is used as the longitudinal temperature strain of the steel rail, and the basic temperature force borne by the steel rail in the longitudinal direction is obtained according to the longitudinal temperature strain of the steel rail and the area of the longitudinal section of the steel rail;
in the embodiment, under the action of temperature, the steel rail bears basic temperature force in the vertical direction and the longitudinal direction, but the force is different in magnitude;
wherein, in the fixing area of the jointless track, a long steel rail is laid, and two ends of the long steel rail are restrained by fasteners and the like, so that under the action of temperature, although the steel rail in the fixing area bears basic temperature force, the basic temperature force can not cause the steel rail to generate strain in the longitudinal direction, and the basic temperature force is converted into the internal force of the steel rail; because the strain on each point in the steel rail is the same under the action of temperature, the measured temperature strain generated in the vertical direction of the steel rail can be used as the temperature strain in the longitudinal direction of the steel rail, so that the basic temperature force born by the steel rail in the longitudinal direction can be obtained;
step 205: acquiring additional strain of the steel rail generated in the longitudinal direction under the action of external additional force through a longitudinal fiber grating in the detection terminal;
specifically, in the present embodiment, an external additional force, such as a longitudinal additional force of braking, bending, etc., is applied to the rail, and under the longitudinal additional force, an additional strain is locally generated in the rail in the longitudinal direction;
step 206: according to the longitudinal strain, obtaining the additional force borne by the steel rail in the longitudinal direction;
wherein, step 205 and step 206 can be executed at any position between step 201 and step 207;
step 207: the longitudinal force of the steel rail is obtained according to the basic temperature force and the additional force born by the steel rail in the longitudinal direction.
In this embodiment, the temperature strain of the steel rail in the vertical direction and the additional strain in the longitudinal direction are obtained through the longitudinal fiber bragg grating and the vertical fiber bragg grating, or the temperature strain of the steel rail in the transverse direction and the additional strain in the longitudinal direction are obtained through the longitudinal fiber bragg grating and the transverse fiber bragg grating, and then the longitudinal force of the steel rail is obtained through the obtained temperature strain and the obtained additional strain.
Preferably, in this embodiment, two wiring schemes of measuring the temperature strain and the additional strain of the steel rail by the detection terminal are further described by taking a vertical direction and a longitudinal direction which are in an orthogonal relationship as an example;
in the first embodiment, as shown in FIG. 3,
the detection terminal comprises two fiber gratings, namely a fiber grating 1 and a fiber grating 2, wherein the two fiber gratings are arranged orthogonally and distributed in a cross shape, the fiber grating 1 is connected with an input end 4 and an output end 5 through two lead wires respectively, and the fiber grating 2 is connected with the input end 4 and the output end 5 through the other two lead wires respectively; the input end 4 is used for inputting optical signals, and the output end 5 is used for outputting the temperature strain of the steel rail in the vertical direction and the additional strain of the steel rail in the longitudinal direction, which are measured by the detection terminal;
the fiber bragg grating 1 forms a longitudinal fiber bragg grating and is used for acquiring additional strain of the steel rail in the longitudinal direction under the action of external additional force; the fiber grating 2 forms a vertical fiber grating and is used for acquiring temperature strain of the steel rail in the vertical direction under the action of temperature;
further, when the detection terminal is installed on the steel rail, one of the two fiber gratings is distributed along the neutral axis of the steel rail.
In a second embodiment, as shown in FIG. 4,
the detection terminal comprises four fiber gratings 3, the four fiber gratings 3 are distributed in a rhombus shape in a surrounding mode, a small space is formed at one corner of the rhombus shape to form two end points, and the two end points are respectively connected with an input end 6 and an output end 7 through lead wires; the input end 6 is used for inputting optical signals, and the output end 7 is used for outputting the temperature strain of the steel rail in the vertical direction and the additional strain in the transverse direction measured by the detection terminal;
the four fiber gratings 3 form a full-bridge orthogonal form, form a longitudinal fiber grating and a vertical fiber grating, and can measure the strain of the steel rail in the vertical direction and the longitudinal direction, namely, the additional strain in the longitudinal direction under the action of external additional force and the temperature strain of the steel rail in the vertical direction under the action of temperature;
further, when the detection terminal is installed on the steel rail, one diagonal line of the rhombus formed by the four fiber gratings is distributed along the neutral axis of the steel rail.
In this embodiment, through installing detection terminal on the side waist of rail, and then can acquire under the temperature effect, the temperature strain of rail production on vertical to and under the effect of external additional force, the additional strain of rail production on vertical has just so obtained the strain of rail production on vertical and vertical, has realized two-way strain detection.
Or, the detection terminal is arranged at the bottom of the steel rail, so that the temperature strain of the steel rail generated in the transverse direction under the action of temperature and the additional strain of the steel rail generated in the longitudinal direction under the action of external additional force can be acquired, the strain of the steel rail generated in the transverse direction and the longitudinal direction is acquired, and the bidirectional strain detection is realized.
Further, in this embodiment, a fiber grating sensor is used to detect the steel rail, a plurality of fiber gratings are disposed inside the sensor, and the fiber gratings are used to obtain the temperature strain and the additional strain of the steel rail in the orthogonal direction. The mode that adopts resistance strain gauge to detect the rail is different from among the prior art, because resistance strain gauge is anticorrosive, easily impaired when placing external environment for a long time, and receive electromagnetic interference easily, the drift of zero point of resistance strain gauge is comparatively general simultaneously, when the staff need should become flat through this resistance and detect the longitudinal force of rail, must reset it earlier to can't detect for a long time. The fiber bragg grating adopted in the embodiment of the invention is not easily interfered by the external severe environment, so that the long-term detection of the steel rail can be realized.
EXAMPLE III
To the first embodiment, a third embodiment of the present invention provides a detection terminal, referring to fig. 5, including:
the first acquiring module 51 is used for acquiring temperature strain of the steel rail generated in a direction orthogonal to the longitudinal direction of the steel rail under the action of temperature;
and the second acquiring module 52 is used for acquiring the additional strain of the steel rail generated in the longitudinal direction under the action of the external additional force of the steel rail.
Example four
For the second embodiment, the present invention provides another detection terminal, and preferably, in this embodiment, the detection terminal is a fiber grating sensor based on a bidirectional strain detection technology. Referring to fig. 6, the sensing terminal includes:
a power module 61, a first obtaining module 63, a second obtaining module 64;
the power supply module 61 is used for supplying power to the detection terminal when the detection terminal works;
the first acquisition module 62 is specifically a vertical fiber grating, and is used for acquiring temperature strain of the steel rail in the vertical direction under the temperature action when the detection terminal is installed on the waist of the steel rail;
when the detection terminal is installed at the bottom of the steel rail, the first obtaining module 62 is specifically a transverse fiber bragg grating, and is used for obtaining the temperature strain of the steel rail generated in the transverse direction under the temperature action;
the second obtaining module 63, specifically a longitudinal fiber grating, is configured to obtain an additional strain generated in the longitudinal direction of the steel rail under an external additional force.
The fiber bragg grating sensor based on the bidirectional strain detection technology in the embodiment has a small volume and is easy to install on a steel rail.
EXAMPLE five
Aiming at the second embodiment, the fifth embodiment of the invention provides a steel rail detection system which comprises the detection terminal. Referring to fig. 7, the detection system specifically includes: a detection terminal 71, a processing terminal 72;
the detection terminal 71 includes: a power module 711, a first obtaining module 712, a second obtaining module 713;
preferably, in this embodiment, the detection terminal 71 is a fiber grating sensor based on a bidirectional strain detection technology;
a power supply module 711, configured to provide power to the detection terminal 71 when the detection terminal is in operation;
the first obtaining module 712 is specifically a vertical fiber grating, and is configured to obtain a temperature strain of the steel rail in a vertical direction under a temperature effect when the detection terminal 71 is installed on the waist of the steel rail;
when the detection terminal 71 is installed at the bottom of the steel rail, the first obtaining module 712 is specifically a transverse fiber grating, and is configured to obtain a temperature strain of the steel rail generated in the transverse direction under the temperature effect of the steel rail;
the second obtaining module 713, specifically a longitudinal fiber grating, is configured to obtain an additional strain generated in the longitudinal direction of the steel rail under an external additional force;
a processing terminal 72 comprising: a basic temperature force processing module 721, an additional force processing module 722, a longitudinal force processing module 723;
the basic temperature force processing module 721 is configured to obtain the obtained temperature strain as a longitudinal temperature strain of the steel rail, and obtain a basic temperature force borne by the steel rail in the longitudinal direction according to the longitudinal temperature strain of the steel rail and an area of a longitudinal section of the steel rail;
the additional force processing module 722 is used for obtaining an additional force borne by the steel rail in the longitudinal direction according to the obtained additional strain;
and the longitudinal force processing module 723 is used for obtaining the longitudinal force of the steel rail according to the basic temperature force and the additional force borne by the steel rail in the longitudinal direction.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, where the program may be stored in a computer-readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A rail detection method is characterized by comprising the following steps:
acquiring temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail under the temperature action of the steel rail through a detection terminal;
taking the temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail as the temperature strain in the longitudinal direction of the steel rail; obtaining basic temperature force borne by the steel rail in the longitudinal direction according to the temperature strain of the steel rail in the longitudinal direction;
acquiring additional strain of the steel rail in the longitudinal direction under the action of external additional force by the detection terminal;
obtaining the additional force borne by the steel rail in the longitudinal direction according to the additional strain;
obtaining the longitudinal force of the steel rail according to the basic temperature force and the additional force borne by the steel rail in the longitudinal direction;
the external additional force comprises braking and bending longitudinal additional force, and under the action of the longitudinal additional force, the steel rail generates additional strain locally in the longitudinal direction.
2. The method of claim 1, wherein the acquiring, by the detection terminal, the temperature strain of the steel rail generated under the effect of the temperature in the direction orthogonal to the longitudinal direction of the steel rail comprises:
mounting the detection terminal on the lateral waist of the steel rail along the neutral axis of the steel rail;
the temperature strain generated in the vertical direction of the steel rail under the temperature action is obtained through the detection terminal, and the vertical direction and the longitudinal direction are in an orthogonal relation.
3. The method of claim 1, wherein the acquiring, by the detection terminal, the temperature strain of the steel rail generated under the effect of the temperature in the direction orthogonal to the longitudinal direction of the steel rail comprises:
mounting the detection terminal at the bottom of the steel rail along the neutral axis of the steel rail;
and acquiring the temperature strain of the steel rail generated in the transverse direction under the temperature action by the detection terminal, wherein the transverse direction and the longitudinal direction are in an orthogonal relation.
4. The method of claim 2 or 3, wherein the temperature strain and the additional strain are acquired by the detection terminal through a fiber grating.
5. The method of claim 4,
four optical fiber gratings distributed in a diamond shape are arranged in the detection terminal, and the temperature strain and the additional strain are obtained through a full-bridge orthogonal form formed by the four optical fiber gratings; one diagonal of the rhombus is distributed along the neutral axis of the steel rail;
or,
two optical fiber gratings distributed in a cross shape are arranged in the detection terminal, and the temperature strain and the additional strain are obtained through the two optical fiber gratings respectively; one of the fiber gratings is distributed along the neutral axis of the steel rail.
6. The method of claim 5, wherein said deriving a base temperature force experienced by the rail in the longitudinal direction from the temperature strain in the longitudinal direction of the rail comprises:
and obtaining the basic temperature force born by the steel rail in the longitudinal direction according to the temperature strain of the steel rail in the longitudinal direction and the area of the longitudinal section of the steel rail.
7. Detection terminal, its characterized in that includes:
the first acquisition module is used for acquiring temperature strain generated in the direction which is orthogonal to the longitudinal direction of the steel rail under the action of temperature;
and the second acquisition module is used for acquiring additional strain generated by the steel rail in the longitudinal direction under the action of external additional force, wherein the external additional force comprises braking and bending longitudinal additional force, and the additional strain is locally generated by the steel rail in the longitudinal direction under the action of the longitudinal additional force.
8. The detection terminal of claim 7, wherein the first obtaining module comprises:
and the vertical acquisition submodule is used for acquiring the temperature strain generated in the vertical direction of the steel rail under the temperature action of the steel rail.
9. The detection terminal of claim 7, wherein the first obtaining module comprises:
and the transverse acquisition submodule is used for acquiring the temperature strain generated in the transverse direction of the steel rail under the temperature action of the steel rail.
10. The steel rail detection system is characterized by comprising a detection terminal and a processing terminal,
the detection terminal is used for acquiring temperature strain generated in the direction which is orthogonal to the longitudinal direction of the steel rail under the temperature action of the steel rail;
acquiring additional strain generated in the longitudinal direction of the steel rail under the action of external additional force, wherein the external additional force comprises braking and bending longitudinal additional force, and the steel rail can generate the additional strain locally in the longitudinal direction under the action of the longitudinal additional force;
the processing terminal is used for taking the temperature strain generated in the direction orthogonal to the longitudinal direction of the steel rail as the temperature strain of the longitudinal direction of the steel rail; obtaining basic temperature force borne by the steel rail in the longitudinal direction according to the temperature strain of the steel rail in the longitudinal direction;
obtaining the additional force borne by the steel rail in the longitudinal direction according to the additional strain;
and obtaining the longitudinal force of the steel rail according to the basic temperature force and the additional force born by the steel rail in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210173479.XA CN102733272B (en) | 2012-05-30 | 2012-05-30 | Steel rail detection method, system and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210173479.XA CN102733272B (en) | 2012-05-30 | 2012-05-30 | Steel rail detection method, system and terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102733272A CN102733272A (en) | 2012-10-17 |
| CN102733272B true CN102733272B (en) | 2014-11-26 |
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| CN103207117A (en) * | 2013-03-07 | 2013-07-17 | 大连理工大学 | Stimulation experiment system for high-speed railway steel rail static loadings |
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| CN105222942B (en) * | 2015-11-09 | 2017-12-12 | 西南交通大学 | Gapless track longitudinal direction force test method and system |
| CN107268353B (en) * | 2017-08-02 | 2019-04-30 | 中国铁道科学研究院铁道建筑研究所 | Seamless railroad release locking operational method and device |
| CN111307056B (en) * | 2020-03-11 | 2021-04-20 | 武汉理工大学 | Method for testing residual strain of composite material winding pipe based on grating sensor |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072019A (en) * | 1991-10-25 | 1993-05-12 | 北京科技大学 | A kind of earth stress measuring method of complete temperature compensation and device |
| JP2849038B2 (en) * | 1994-04-08 | 1999-01-20 | 新日本製鐵株式会社 | Rail axial force measurement method and rail that can measure axial force |
| US6381521B1 (en) * | 2000-10-11 | 2002-04-30 | Transportation Technology Center, Inc. | Dynamic angle of attack measurement system and method therefor |
| JP2002236065A (en) * | 2001-02-06 | 2002-08-23 | Railway Technical Res Inst | Detection method for horizontal force in traverse direction of rail |
| CN2550407Y (en) * | 2002-06-07 | 2003-05-14 | 同济大学 | Longitudinal force testing device for seamless line steel rail of railway |
| CN1442679A (en) * | 2002-03-05 | 2003-09-17 | 王建文 | Jointless track temperature force and locking rail temperature test method |
| UA63129A (en) * | 2002-12-10 | 2004-01-15 | Nat Univ Volodymyr Dal Eunu | Method for determining the destance from the vertiical axis of symmetry of the rail to the line of action of vertical load |
| CN101000269A (en) * | 2006-01-09 | 2007-07-18 | 同济大学 | Method for measuring rail longitudinal force of jointless track structure |
| CN101706336A (en) * | 2009-10-14 | 2010-05-12 | 华东交通大学 | Non-contact magnetic-grid-type welded rail temperature force testing device and testing method |
| CN101887468A (en) * | 2009-05-14 | 2010-11-17 | 秦艳 | Method for calculating longitudinal force of ballastless track on bridge |
-
2012
- 2012-05-30 CN CN201210173479.XA patent/CN102733272B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072019A (en) * | 1991-10-25 | 1993-05-12 | 北京科技大学 | A kind of earth stress measuring method of complete temperature compensation and device |
| JP2849038B2 (en) * | 1994-04-08 | 1999-01-20 | 新日本製鐵株式会社 | Rail axial force measurement method and rail that can measure axial force |
| US6381521B1 (en) * | 2000-10-11 | 2002-04-30 | Transportation Technology Center, Inc. | Dynamic angle of attack measurement system and method therefor |
| JP2002236065A (en) * | 2001-02-06 | 2002-08-23 | Railway Technical Res Inst | Detection method for horizontal force in traverse direction of rail |
| CN1442679A (en) * | 2002-03-05 | 2003-09-17 | 王建文 | Jointless track temperature force and locking rail temperature test method |
| CN2550407Y (en) * | 2002-06-07 | 2003-05-14 | 同济大学 | Longitudinal force testing device for seamless line steel rail of railway |
| UA63129A (en) * | 2002-12-10 | 2004-01-15 | Nat Univ Volodymyr Dal Eunu | Method for determining the destance from the vertiical axis of symmetry of the rail to the line of action of vertical load |
| CN101000269A (en) * | 2006-01-09 | 2007-07-18 | 同济大学 | Method for measuring rail longitudinal force of jointless track structure |
| CN101887468A (en) * | 2009-05-14 | 2010-11-17 | 秦艳 | Method for calculating longitudinal force of ballastless track on bridge |
| CN101706336A (en) * | 2009-10-14 | 2010-05-12 | 华东交通大学 | Non-contact magnetic-grid-type welded rail temperature force testing device and testing method |
Non-Patent Citations (7)
| Title |
|---|
| 光纤光栅传感器在桥上无缝道岔结构模型试验中的应用;张强等;《铁道建筑》;20101215(第12期);"2.1 对比试验"部分 * |
| 冯绍敏等.桥上无缝线路附加伸缩力的远程监测与分析.《华东交通大学学报》.2011,第28卷(第2期), * |
| 客运专线桥上无缝线路附加力有限元分析;黄小明;《中国优秀硕士学位论文全文数据库•工程科技II辑》;20060915;正文第13页 * |
| 工程科技II辑》.2006, * |
| 张强等.光纤光栅传感器在桥上无缝道岔结构模型试验中的应用.《铁道建筑》.2010,(第12期), * |
| 桥上无缝线路附加伸缩力的远程监测与分析;冯绍敏等;《华东交通大学学报》;20110415;第28卷(第2期);"1 测试方法及原理"部分，图1-2 * |
| 黄小明.客运专线桥上无缝线路附加力有限元分析.《中国优秀硕士学位论文全文数据库• * |
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Effective date of registration: 20170116 Address after: 610000 Sichuan, Chengdu, Jinniu District, No. two North Ring Road, No. 1, No. 111 Patentee after: CHENGDU SOUTHWEST JIAOTONG UNIVERSITY HIGH-SPEED RAIL EQUIPMENT CO., LTD. Patentee after: Xi-nan Jiatoong Univ. Address before: 610031 Sichuan City, Chengdu Province, No. two North Ring Road,, Southwest Jiao Tong University Patentee before: Xi-nan Jiatoong Univ. |