CN208593396U - Monitoring system for temperature stress of seamless steel rail - Google Patents
Monitoring system for temperature stress of seamless steel rail Download PDFInfo
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- CN208593396U CN208593396U CN201821231198.4U CN201821231198U CN208593396U CN 208593396 U CN208593396 U CN 208593396U CN 201821231198 U CN201821231198 U CN 201821231198U CN 208593396 U CN208593396 U CN 208593396U
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Abstract
本实用新型公开了一种无缝钢轨温度应力的监测系统，该系统包括：嵌入式子系统、温度监测子系统以及编码器；编码器和温度监测子系统均连接嵌入式子系统，编码器安装在列车的轮对转向架轴头上，温度监测子系统和嵌入式子系统安装在列车的车体上。编码器产生采样信号，温度监测子系统采集无缝钢轨的实时温度，嵌入式子系统在列车运行时，根据采样信号控制温度监测子系统采集无缝钢轨的实时温度，根据实时温度确定无缝钢轨的实时温度应力。本实用新型将编码器安装在列车的轮对转向架轴头上，温度监测子系统和嵌入式子系统安装在列车的车体上，可以在列车运行的同时，动态实时监测钢轨温度应力，提高钢轨温度应力的监测效率和准确率。
The utility model discloses a monitoring system for the temperature stress of a seamless steel rail. The system comprises: an embedded subsystem, a temperature monitoring subsystem and an encoder; the encoder and the temperature monitoring subsystem are connected to the embedded subsystem, and the encoder is installed On the axle head of the wheelset bogie of the train, the temperature monitoring subsystem and the embedded subsystem are installed on the body of the train. The encoder generates a sampling signal, and the temperature monitoring subsystem collects the real-time temperature of the seamless rail. When the train is running, the embedded subsystem controls the temperature monitoring subsystem to collect the real-time temperature of the seamless rail according to the sampling signal, and determines the seamless rail according to the real-time temperature. real-time temperature stress. In the utility model, the encoder is installed on the axle head of the wheelset bogie of the train, and the temperature monitoring subsystem and the embedded subsystem are installed on the body of the train, which can dynamically monitor the temperature stress of the rail in real time while the train is running, and improve the Monitoring efficiency and accuracy of rail temperature stress.
Description
Technical field
The utility model relates to railway construction technical field more particularly to the monitoring systems of gapless rail temperature stress.
Background technique
This part intends to provides background or context for the utility model embodiment stated in claims.Herein
Description recognizes it is the prior art not because not being included in this section.
Railway is the important component of national communication transport, and China uses gapless rail substantially at present.Rail joint
The constraint to disappear plus fastener etc. to rail causes to generate very big temperature stress (temperature stress also known as heat inside gapless rail
Stress refers to the stress generated when object temperature variation because deformation suffers restraints).Compared to common rail, gapless rail is produced
Raw temperature stress is bigger.Related experiment shows every 1 DEG C of the variation of gapless rail rail temperature, answers in route fixed area interior rail temperature
The variable quantity of power is 2.43MPa, if gapless rail rail temperature changes 50 DEG C, the variable quantity of Railroad's Temperature Stress can be up to
121.5MPa easily makes rail rail expansion, runway or broken rail occur in this way, seriously affects the operational safety of train.Therefore, it is necessary to right
Gapless rail temperature stress is monitored, to ensure train operating safety.
The temperature stress of gapless rail is carried out in the mode of no Train Schedule section personal monitoring currently, mainly taking
Monitoring, using temperature sensor measurement rail temperature signal, acquisition module receives the temperature signal that temperature sensor is sent, terminal
It receives data to acquisition module to handle, to monitor the temperature stress of gapless rail.But existing monitoring gapless rail
Temperature stress can only be monitored in no train run the period, and monitoring is very restricted, and is unable to real-time monitoring rail
Temperature stress causes the monitoring efficiency of gapless rail temperature stress lower；In addition, the rail temperature without the monitoring of train run the period
There are biggish difference for Railroad's Temperature Stress when stress and train operation, cause the monitoring of existing Railroad's Temperature Stress inaccurate
Really.
Therefore, existing Railroad's Temperature Stress monitoring exists because monitoring caused by being unable to real-time monitoring Railroad's Temperature Stress
The low problem of low efficiency, accuracy rate.
Utility model content
The utility model embodiment provides a kind of monitoring system of gapless rail temperature stress, to solve existing rail
Temperature stress monitoring is existing because of the problem that monitoring efficiency caused by being unable to real-time monitoring is low, accuracy rate is low, which includes:
Embedded subsystem, temperature monitoring subsystem, encoder；
The encoder and the temperature monitoring subsystem are all connected with the embedded subsystem, and the encoder is mounted on
For the wheel of train on bogie spindle nose, the temperature monitoring subsystem and the embedded subsystem are mounted on the car body of train
On；
The encoder is used to acquire the real-time temperature of gapless rail for generating sampled signal, the temperature monitoring subsystem
Degree, the embedded subsystem are used in train operation, are controlled the temperature monitoring subsystem according to the sampled signal and are adopted
The real time temperature for collecting gapless rail, the real time temperature stress of gapless rail is determined according to the real time temperature.
In the utility model embodiment, encoder and temperature monitoring subsystem are all connected with embedded subsystem, encoder peace
To on bogie spindle nose, temperature monitoring subsystem and embedded subsystem are mounted on the car body of train wheel mounted in train.It compiles
Code device generates sampled signal, and temperature monitoring subsystem acquires the real time temperature of gapless rail, and embedded subsystem is in train operation
When, the real time temperature of temperature monitoring subsystem acquisition gapless rail is controlled according to sampled signal, is determined according to real time temperature seamless
The real time temperature stress of rail.Encoder is mounted on the wheel of train on bogie spindle nose by the utility model embodiment, temperature
Monitoring subsystem and embedded subsystem are mounted on the car body of train, can be while train operation, as vehicle-mounted monitoring
System, dynamic realtime monitor Railroad's Temperature Stress, improve the monitoring efficiency and accuracy rate of Railroad's Temperature Stress.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the monitoring system of gapless rail temperature stress provided by the embodiment of the utility model；
Fig. 2 is another structural representation of the monitoring system of gapless rail temperature stress provided by the embodiment of the utility model
Figure；
Fig. 3 is the flow chart of the monitoring method of gapless rail temperature stress provided by the embodiment of the utility model；
Fig. 4 is the process of step 303 in the monitoring method of gapless rail temperature stress provided by the embodiment of the utility model
Figure.
Specific embodiment
It is right with reference to the accompanying drawing for the objectives, technical solutions, and advantages of the embodiments of the present invention are more clearly understood
The utility model embodiment is described in further details.Here, the illustrative embodiments and their description of the utility model are for solving
The utility model is released, but is not intended to limit the scope of the present invention.
Fig. 1 shows the schematic construction of the monitoring system of gapless rail temperature stress provided by the embodiment of the utility model,
For ease of description, part relevant to the utility model embodiment is illustrated only, details are as follows:
As shown in Figure 1, the monitoring system of gapless rail temperature stress, comprising:
Embedded subsystem 101, temperature monitoring subsystem 102 and encoder 103.
The encoder 103 and the temperature monitoring subsystem 102 are all connected with the embedded subsystem 101, the volume
Code device 103 is mounted on the wheel of train on bogie spindle nose, the temperature monitoring subsystem 102 and the embedded subsystem
101 are mounted on the car body of train.
The encoder 103 is for generating sampled signal, and the temperature monitoring subsystem 102 is for acquiring gapless rail
Real time temperature, the embedded subsystem 101 are used in train operation, control the temperature monitoring according to the sampled signal
Subsystem 102 acquires the real time temperature of gapless rail, and the real time temperature stress of gapless rail is determined according to the real time temperature.Its
In, it will be appreciated by persons skilled in the art that encoder 103 generates sampled signal and embedded subsystem 101 according to institute
It states temperature and determines that the temperature stress of gapless rail is the prior art well known to those skilled in the art.
In the utility model embodiment, the encoder 103 generates sampled signal by equidistant sampling method.Assuming that column
For wheel to rotating a circle, encoder rotates 5000 turns, generates 5000 pulse signals, according to wheel between mileage determination of walking etc.
Away from sampled signal, for example, every 0.25 meter of the walking of Railway wheelset, encoder generate 1 sampled signal.Embedded system is one to finish
Inside full insertion controlled device, the dedicated computer system designed for specific application is application-centered, with computer technology
Based on, software and hardware can be cut, and adapt to application system to the dedicated of the strict demands such as function, reliability, cost, volume, power consumption
Computer system, usually one control program embeded processor control panel stored in ROM.In the present embodiment, institute
Stating embedded subsystem 101 includes microprocessor or single-chip microcontroller.
In a further embodiment, in order to further increase gapless rail real time temperature stress accuracy, utilize
Piecewise linearity least square method is compensated and is corrected to the temperature stress of gapless rail, by compensation and revised temperature stress
It is determined as the real time temperature stress of gapless rail.Piecewise linearity least square method refers to be intended to nonlinear polynomial function
It during conjunction, needs for aim parameter to be segmented, and is fitted respectively in different piecewise intervals, so that aim parameter is every
One section is expressed using different multinomials, also referred to as piecewise polynomial fitting.It is clear that, segmentation is more, fitting
Effect is better, precision is higher.In utility model embodiment, piecewise linearity least square method can use to the temperature of gapless rail
It spends stress and carries out piecewise fitting, i.e., the temperature stress of gapless rail is divided into multiple piecewise intervals, in different piecewise interval point
It is not fitted, the temperature stress of gapless rail is compensated and corrected to realize, the real time temperature for improving gapless rail is answered
The accuracy of power.
In the utility model embodiment, the encoder 103 of the monitoring system of gapless rail temperature stress is mounted on train
Wheel on bogie spindle nose, temperature monitoring subsystem 102 and embedded subsystem 101 are mounted on the car body of train, make
It, in this way can be dynamic in real time to realize to the temperature stress of gapless rail while train operation for vehicle-mounted monitoring system
Monitoring, it is thus possible to improve the monitoring efficiency of gapless rail temperature stress.In addition, monitoring system is mounted on by the utility model
It is used as vehicle-mounted monitoring system on car body, the long distance monitoring to the temperature stress of gapless rail may be implemented.In addition, this is practical new
Type embodiment, the gapless rail temperature stress when monitoring system monitoring train operation of gapless rail temperature stress therefore can be with
Improve the accuracy rate of gapless rail temperature stress monitoring.
Fig. 2 shows another signal knots of the monitoring system of gapless rail temperature stress provided by the embodiment of the utility model
Structure illustrates only part relevant to the utility model embodiment, details are as follows for ease of description:
In the present embodiment, described embedding in order to further increase the efficiency and accuracy rate that gapless rail temperature stress monitors
Enter subsystem 101 in the lower car body center of train, the monitoring system includes two temperature monitoring subsystems 102, respectively
It is mounted on the lower car body two sides of train；The monitoring system includes two encoders 103, is separately mounted to Railway wheelset steering
On two spindle noses of frame.
In the utility model embodiment, two encoders 103 can generate the letter of the sampling to two sides gapless rail simultaneously
Number or two encoders 103 can using one as main encoder, another as reserved encoder, main encoder for some reason
When barrier is not available, reserved encoder can be used in time, it is thus possible to improve the school of gapless rail temperature stress monitoring system
Survey efficiency, will not lead to not because of an encoder fault using.Likewise, two temperature monitoring subsystems 102 can be real
It now simultaneously can be using one as warm to the sampling of the real time temperature of two sides gapless rail or two temperature monitoring subsystems 102
Monitoring subsystem is spent, another is as backup temperature monitoring subsystem, when main temperature monitoring subsystem is not available because of failure,
Backup temperature monitoring subsystem can be used in time, it is thus possible to improve effect is surveyed in the school of gapless rail temperature stress monitoring system
Rate, will not lead to not because of a temperature monitoring subsystem fault using.
In addition, encoder 103 is mounted on two spindle noses of Railway wheelset bogie by the utility model embodiment, it will be warm
Degree monitoring subsystem 102 is mounted on the lower car body two sides of train, and embedded subsystem 101 is mounted in the lower car body of train
Centre, neither influences the operation of train, and the monitoring to gapless rail temperature stress can be realized while train operation.Cause
This, can be further improved the monitoring efficiency and accuracy rate of gapless rail temperature stress.
In a further embodiment, the temperature monitoring subsystem 102 includes infrared temperature measurement system, the encoder
103 include photoelectric encoder.The infrared temperature measurement system realizes the monitoring to gapless rail temperature based on infrared measurement of temperature principle.It is red
The principle of outer thermometric is i.e.: the object that all temperature are higher than absolute zero is all ceaselessly issuing infrared energy to surrounding space
Amount, the size of the infrared energy of object and its distribution by wavelength, its surface temperature has very close pass with him
System, therefore, by the measurement of the infrared energy radiated to object itself, can accurately measure its surface temperature.
In a further embodiment, as shown in Fig. 2, the monitoring system of the gapless rail temperature stress further include:
Satellite positioning module 104 connects the embedded subsystem 101, for feedback calibration mileage to described embedding
Enter subsystem 101, the calibration mileage that the embedded subsystem 101 is fed back according to the satellite positioning module 104 is repaired
The accumulative mileage error of the just described encoder 103.
In the utility model embodiment, the accumulative of train can be determined according to information such as the revolving speeds of the encoder 103
Mileage, however, train is after running for a period of time, based on the accumulative mileage that encoder 103 determines can exist it is certain it is accumulative in
Journey error causes train mileage inaccurate, and scene can not accurately determine the railway line where Railroad's Temperature Stress exception
Road position.Satellite positioning module 104, for providing the calibration mileage in certain time, example to the embedded subsystem
Such as, the positioning network that satellite positioning module 104 is formed according to multiple position location satellites determines school of the train within the scope of a certain mileage
Quasi- mileage, what is certain is that, the calibration mileage that satellite positioning module 104 provides is more true than according to encoder 103
The mileage of fixed train is accurate, and therefore, the embedded subsystem can use the calibration of the feedback of satellite positioning module 104
Mileage corrects the accumulative mileage error of the encoder 103.
For example, satellite positioning module 104 can in K kilometers of train every operation, just to encoder determine it is accumulative in
Journey error is corrected.It assuming that train operation distance is K kilometers, and is K1 kilometers according to the train mileage that encoder 103 determines,
Wherein, for K1 there are certain accumulative mileage error, satellite positioning module 104 feeds back to the calibration mileage of embedded subsystem 101
Data are K2, and the calibration mileage K2 that embedded system 101 can be fed back according to satellite positioning module 104 corrects the coding
The error of the accumulative mileage K1 of device 103.For example, it has been determined that 120 kilometers of train mileage A1, A1 are deposited according to encoder 103
In certain accumulative mileage error；And in 120 kilometers of mileage, satellite positioning module 104 feeds back to embedded subsystem 101
Calibration mileage be B1, then the embedded system 101 can according to satellite positioning module 104 feed back calibration mileage
B1 corrects the accumulative mileage A1 error of the encoder 103.
In a further embodiment, as shown in Fig. 2, the monitoring system of the gapless rail temperature stress further include:
Fault alarm module 105 connects the embedded subsystem 101, in the gapless rail temperature stress
Alarm signal is issued when faults of monitoring system；
The faults of monitoring system includes following one or more:
The encoder 103 can not generate sampled signal or the sampled signal of the generation of the encoder 103 is pre- not meet
If the sampled signal of condition.
The temperature monitoring subsystem 102 can not acquire the real time temperature of gapless rail；Or the temperature monitoring subsystem
The real time temperature of 102 collected gapless rails is not in preset temperature range.
In the present embodiment, when the sampled signal that encoder 103 can not generate sampled signal or generation gets muddled, together
By taking above-mentioned encoder as an example, Railway wheelset rotates a circle sample, and encoder rotates 5000 turns, generates 5000 pulse signals, according to
The mileage of equidistant every 0.25 meter of the walking of sampling method setting Railway wheelset, encoder generate 1 sampled signal and are therefore compiling
, should be in every 0.25 meter of the walking of Railway wheelset in the code normal situation of device, encoder generates a sampled signal, however is encoding
In the case where device failure, possibly can not generate sampled signal, or may this Railway wheelset walk 1 meter when, encoder is
It produces and just produces 1 sampled signal, or at 0.1 meter of Railway wheelset walking, encoder just produces sampled signal, because
This, determines that the sampled signal that encoder at this time generates is abnormal, i.e. the encoder 103 that breaks down of encoder 103 generates
Sampled signal be not meet the sampled signal of preset condition.The preset condition is preset condition, such as sampling frequency
Rate or sample space interval.
In addition, if infrared temperature measurement system can not acquire the real time temperature of gapless rail or infrared temperature measurement system collects
Gapless rail real time temperature it is abnormal, for example, one negative much smaller than zero or the positive number much larger than zero then determine at this time
Temperature monitoring subsystem 102 break down.The preset temperature range and predetermined temperature range, for example, -60 ° extremely
80 °, for example, determining red when the real time temperature of the collected gapless rail of infrared temperature measurement system is less than -60 ° or is greater than 80 °
Outer thermometric system exception, i.e. the monitoring system of gapless rail temperature stress break down.Determining gapless rail temperature stress
After monitoring system breaks down, alarmed using fault alarm module 105.In other examples, fault alarm module
105 may include indicator light and buzzer, such as indicator light continue flashing or buzzer according to pre- according to predeterminated frequency
If frequency continues sounding, the predeterminated frequency is preset frequency, for example, the predeterminated frequency can be set as 2 times/
Second.
In a further embodiment, the monitoring system of the gapless rail temperature stress further include:
Wireless transport module 106 connects the embedded subsystem 101, for acquire temperature monitoring subsystem 102
The real time temperature of gapless rail is transmitted to ground station.
In addition, ground station can also control the monitoring system by wireless network, such as ground handling
It stands and the monitoring system is turned on or off by wireless network, or be turned on or off the monitoring system in the specific time
System.In addition, ground station also may include a fault alarm module 105, the monitoring for being fed back to wireless transport module 106
The system failure is alarmed, and fault alarm module 105 may include indicator light and buzzer, such as indicator light according to predeterminated frequency
It carries out lasting flashing or buzzer and continues sounding according to predeterminated frequency, the predeterminated frequency is preset frequency, example
Such as, the predeterminated frequency can be set as 2 times/second.
In the utility model embodiment, the real time temperature for the gapless rail that temperature monitoring subsystem 102 acquires is passed through
It is wirelessly transmitted to ground station, data storage, data statistics, data early warning publication and report printing etc. can be carried out.Example
Such as, some period gapless rail temperature stress can be disclosed by counting some period gapless rail temperature stress
Variation degree, and then carry out early warning etc..
Fig. 3 shows the implementation process of the monitoring method of gapless rail temperature stress provided by the embodiment of the utility model,
For ease of description, illustrating only part relevant to the utility model embodiment, details are as follows:
As shown in figure 3, the monitoring method of gapless rail temperature stress, comprising:
Step 301, the encoder 103 generates sampled signal.
In the utility model embodiment, the encoder 103 generates sampled signal according to sampled equidistant method.For example,
Railway wheelset rotates a circle, and encoder rotates 5000 turns, generates 5000 pulse signals, sets train according to equidistant sampling method
The mileage to every 0.25 meter of walking is taken turns, encoder generates 1 sampled signal.
Step 302, the embedded subsystem 101 controls the temperature according to the sampled signal in train operation
The real time temperature of the acquisition gapless rail of monitoring subsystem 102.
In the utility model embodiment, because temperature monitoring subsystem 102 and embedded subsystem 101 are mounted on train
On car body, therefore, embedded subsystem 101 can control the temperature according to the sampled signal while train operation
The real time temperature of the acquisition gapless rail of monitoring subsystem 102.
Step 303, the embedded subsystem 101 determines that the real time temperature of gapless rail is answered according to the real time temperature
Power.
After collecting the temperature stress of gapless rail, it can according to the relationship between temperature and temperature stress, determine
The real time temperature stress of gapless rail.
In the utility model embodiment, because the encoder peace 103 of the monitoring system of gapless rail temperature stress is mounted in column
To on the spindle nose of bogie, temperature monitoring subsystem 102 and embedded subsystem 101 are mounted on the car body of train the wheel of vehicle,
Can while train operation, using gapless rail temperature stress monitoring system monitoring gapless rail temperature stress, because
This, can be improved the efficiency of gapless rail temperature stress monitoring；In addition, when the monitoring train operation of temperature monitoring subsystem 102
The accuracy rate of gapless rail temperature stress monitoring can be improved in the real time temperature of gapless rail.
In a further embodiment, in order to improve the convenience that gapless rail temperature stress monitoring system uses, upper
On the basis of stating step shown in Fig. 3, the monitoring method of the gapless rail temperature stress further include:
Step: temperature stress grade belonging to the real time temperature stress of gapless rail is determined；
Step: it controls the monitoring system and executes predetermined registration operation corresponding with the temperature stress grade.
In the utility model embodiment, the temperature stress grade is predetermined temperature stress levels, for example, can
Temperature stress grade is preset ascending the first estate being gradually incremented by, the second grade, the tertiary gradient and the 4th
Grade etc..The predetermined registration operation is preset operation corresponding with the temperature stress grade, for example, can will be described pre-
If operation is respectively set to the first operation corresponding with described the first estate, the second grade, the tertiary gradient and the fourth estate, the
Two operations, third operation and the 4th operation etc..For example, respectively by 0-10MPa, 10-30MPa, 50-80MPa and 80-
The temperature stress range of 150MPa is determined as the first estate, the second grade, the tertiary gradient and temperature stress of the fourth estate etc.
Grade.Wherein, if the temperature stress of gapless rail is the first estate temperature stress, that is, determine that gapless rail is needs to maintain herein
Management, at this time corresponding to first operation of the first estate are as follows: use the temperature stress of blue instruction gapless rail for the first estate；
If the temperature stress of gapless rail is the second rating temperature stress, that is, determine that gapless rail is planned maintenance management herein, this
When corresponding to the second grade second operation are as follows: use yellow instruction gapless rail temperature stress for the second grade；If seamless
When the temperature stress of rail is tertiary gradient temperature stress, that is, determine that gapless rail is needs urgent repair management herein, at this time
Third corresponding to the tertiary gradient operates are as follows: uses the temperature stress of orange instruction gapless rail for the tertiary gradient；If seamless steel
When the temperature stress of rail is fourth estate temperature stress, that is, determine that herein or else gapless rail is suitable for train high-speed cruising, this
When the 4th operation corresponding to the fourth estate are as follows: use the temperature stress of red instruction gapless rail for the fourth estate, and needs
Speed limit etc. is carried out to train.
Therefore, the present embodiment temperature stress grade according to belonging to the real time temperature stress of gapless rail controls institute
It states monitoring system and executes predetermined registration operation corresponding with the temperature stress grade, improve gapless rail temperature stress monitoring system
What is used is convenient.
Fig. 4 shows step 303 in the monitoring method of gapless rail temperature stress provided by the embodiment of the utility model
Implementation process, for ease of description, illustrating only part relevant to the utility model embodiment, details are as follows:
In the present embodiment, as shown in figure 4, step 303, the embedded subsystem determine nothing according to the real time temperature
Seam rail real time temperature stress include:
Step 401, the temperature difference of the real time temperature and preset standard rail temperature is determined.
In the utility model embodiment, the preset standard rail temperature is the fastening-down temperature of rail of preset gapless rail.
The fastening-down temperature of rail of gapless rail refers to the stress free rail temperature of gapless rail, refers to rail temperature when gapless rail is fully latched, this
When rail inside temperature stress be zero, initial value be gapless rail be laid with when determines, fastening-down temperature of rail be decision steel
The benchmark of rail TEMPERATURE FORCE level, what it was reflected is that gapless rail rail longitudinal direction internal stress under the conditions of different temperature is asked
Topic, i.e., the tensile stress and compression size issue born inside gapless rail are to measure continuous welded rail track stabilized soil pavement
Quantization performance, therefore fastening-down temperature of rail is one of most important technical indicator of gapless track, accurately whether will be directly related to nothing
Seam rail it is in stable condition and feeding, manage, repair safety.Different regional and different environment, fastening-down temperature of rail are different.
Step 402, the real-time of gapless rail is determined according to the temperature difference, steel rail spring modulus and rail linear expansion coefficient
Temperature stress.
In the present embodiment, steel rail spring modulus refers to rail in elastic deformation stage, stress and strain pass in direct ratio
It is (and meeting Hooke's law) that proportionality coefficient is known as steel rail spring modulus, is a physical quantity for describing steel rail spring.Steel
Rail linear expansion coefficient, also known as steel rail spring coefficient (linear expansivity) indicate the degree of rail expansion or shrinkage.Measurement
The real time temperature of obtained gapless rail and the preset standard rail temperature of rail, the i.e. reality of the temperature difference of fastening-down temperature of rail and gapless rail
When temperature stress there are certain quantitative relationships, the real time temperature stress of gapless rail can be specifically determined by following formula:
σ=E × α × (T1-T0)
Wherein, σ is Railroad's Temperature Stress, and it is in general constant 2.1 × 10 that E, which is steel rail spring modulus,5MPa, α
It is under normal conditions constant 1.18 × 10 for rail linear expansion coefficient-5/ DEG C, T1For the rail real time temperature measured when train operation,
T0For rail fastening down rail temperature, T1-T0As rail real time temperature and preset standard rail temperature, the i.e. temperature difference of fastening-down temperature of rail.
In conclusion in the utility model embodiment, encoder 103 and temperature monitoring subsystem 102 are all connected with embedded
Subsystem 101, encoder 103 are mounted on the wheel of train on bogie spindle nose, temperature monitoring subsystem 102 and embedded subsystem
System 101 is mounted on the car body of train.Encoder 103 generates sampled signal, and temperature monitoring subsystem 102 acquires gapless rail
Real time temperature, embedded subsystem 101 control temperature monitoring subsystem 102 according to sampled signal and acquire nothing in train operation
The real time temperature for stitching rail, the real time temperature stress of gapless rail is determined according to real time temperature.The utility model embodiment will be compiled
Code device 103 is mounted on the wheel of train on bogie spindle nose, and temperature monitoring subsystem 102 and embedded subsystem 103 are mounted on
, can be while train operation on the car body of train, real-time monitoring Railroad's Temperature Stress improves the monitoring of Railroad's Temperature Stress
Efficiency and accuracy rate.
Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects
Step is described in detail, it should be understood that being not used to limit this foregoing is merely specific embodiment of the utility model
The protection scope of utility model, within the spirit and principle of the utility model, any modification for being made, changes equivalent replacement
Into etc., it should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of monitoring system of gapless rail temperature stress characterized by comprising
Embedded subsystem, temperature monitoring subsystem and encoder；
The encoder and the temperature monitoring subsystem are all connected with the embedded subsystem, and the encoder is mounted on train
Wheel on bogie spindle nose, the temperature monitoring subsystem and the embedded subsystem are mounted on the car body of train；
The encoder is for generating sampled signal；
The temperature monitoring subsystem is used to acquire the real time temperature of gapless rail；
The embedded subsystem is used in train operation, is controlled the temperature monitoring subsystem according to the sampled signal and is adopted
The real time temperature for collecting gapless rail, the real time temperature stress of gapless rail is determined according to the real time temperature.
2. monitoring system as described in claim 1, which is characterized in that the embedded subsystem is mounted under the car body of train
Portion center, the monitoring system include two temperature monitoring subsystems, are separately mounted to the lower car body two sides of train；The prison
Examining system includes two encoders, is separately mounted on two spindle noses of Railway wheelset bogie.
3. monitoring system as described in claim 1, which is characterized in that the temperature monitoring subsystem includes infrared measurement of temperature system
System, the encoder includes photoelectric encoder.
4. monitoring system as described in claim 1, which is characterized in that further include:
Satellite positioning module connects the embedded subsystem, for feedback calibration mileage to the embedded subsystem,
The calibration mileage that the embedded subsystem is fed back according to the satellite positioning module, correct the encoder it is accumulative in
Journey error.
5. monitoring system as described in claim 1, which is characterized in that further include:
Fault alarm module connects the embedded subsystem, for the monitoring system event in the gapless rail temperature stress
Alarm signal is issued when barrier；
The faults of monitoring system includes following one or more:
It is not meet adopting for preset condition that the encoder, which can not generate sampled signal or the sampled signal of encoder generation,
Sample signal；
The temperature monitoring subsystem can not acquire gapless rail real time temperature or the temperature monitoring subsystem it is collected
The real time temperature of gapless rail is not in preset temperature range.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108891443A (en) * | 2018-08-01 | 2018-11-27 | 中国铁道科学研究院集团有限公司 | The monitoring system and monitoring method of gapless rail temperature stress |
| CN114043127A (en) * | 2021-10-13 | 2022-02-15 | 中国铁路兰州局集团有限公司兰州工务机械段 | Automatic slow cooling equipment for welded joint of welded rail foundation ground steel rail |
-
2018
- 2018-08-01 CN CN201821231198.4U patent/CN208593396U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108891443A (en) * | 2018-08-01 | 2018-11-27 | 中国铁道科学研究院集团有限公司 | The monitoring system and monitoring method of gapless rail temperature stress |
| CN108891443B (en) * | 2018-08-01 | 2024-07-12 | 中国铁道科学研究院集团有限公司 | Monitoring system and monitoring method for temperature stress of seamless steel rail |
| CN114043127A (en) * | 2021-10-13 | 2022-02-15 | 中国铁路兰州局集团有限公司兰州工务机械段 | Automatic slow cooling equipment for welded joint of welded rail foundation ground steel rail |
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