CN106932068A - A kind of train dynamic weighing method and device - Google Patents
A kind of train dynamic weighing method and device Download PDFInfo
- Publication number
- CN106932068A CN106932068A CN201710277291.2A CN201710277291A CN106932068A CN 106932068 A CN106932068 A CN 106932068A CN 201710277291 A CN201710277291 A CN 201710277291A CN 106932068 A CN106932068 A CN 106932068A
- Authority
- CN
- China
- Prior art keywords
- fiber
- train
- grating
- sensor
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/04—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles
- G01G19/045—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing railway vehicles for weighing railway vehicles in motion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/125—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing wherein the weighing element is an optical member
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention discloses a kind of train dynamic weighing method and device, and the Weighing method includes：N number of fiber-optic grating sensor group is opened, the N is positive integer, and each described fiber-optic grating sensor group includes four fiber-optic grating sensors；The fiber-optic grating sensor group is one group and is arranged on inside and outside the branch of rail bottom with two fiber-optic grating sensors；Obtain the wavelength shift that the fiber-optic grating sensor group is produced；The wavelength shift is converted into train weight information；Judge whether the train weight information meets train load limit condition, obtain the first judged result；If first judged result is expressed as the train weight information meets train load limit condition, it is determined that the train normally travel；If first judged result is expressed as the train weight information and does not meet train load limit condition, it is determined that the train is travelled extremely.Dynamic weighing can in real time be carried out to train using Weighing method of the invention and device, judge train with the presence or absence of overload or the phenomenon of unbalance loading.
Description
Technical field
The present invention relates to train dynamic weighing field, more particularly to a kind of train dynamic weighing method and device.
Background technology
Railway transportation is the main artery of national economy, and transportation safety is the most important thing of railway transportation.However, due to
Economic interests are ordered about, and for a long time railway freight car has the phenomenon of the unreasonable transport such as serious overload, unbalance loading, train
It is long-term to be under overload and unbalance loading state, by badly damaged rail facility, shorten the service life of railway, while can also influence fire
Car traffic safety；Again due to the wheel and axle unbalance stress of train, wheel tread occurs out-of-roundness, polygonization, crackle etc.
Failure, these failures can cause high-frequency percussion to be vibrated, and increase the vertical impulsive force of rail, can not only reduce the comfortable of train
Property, produce larger noise, and wheel and axle are due to being chronically at fatigue state, off-axis, cut axle, climb rail and train is overturned
Accident often has generation.So, wheel tread flaw detection is weighed and periodically carried out to train to eliminate accident potential, has become and works as
The major issue that modern countries in the world are attracted attention jointly.
At present it is most popular railway freight-car is weighed, is overloaded, the detection of unbalance loading situation be foundation ditch broken rail detection system
System, the system can realize that dynamic bidirectional is detected.But the characteristics of due to the system rail break, train wants speed limit to pass through, to railway train
Vehicle speed increase causes very big obstacle, and the system installs complicated and relatively costly.In recent years, to weigh, overload with it is inclined
The detection technique of load achieves certain development and achievement, especially applies the electric theoretical nothing developed of strain gauge transducer metering
Foundation ditch, unceasing axle type weigh, overload and deviation load detection system realizes new breakthrough, and metered rate and measuring accuracy are all very big
It is improved in degree.However, tradition electricity strain gauge transducer is, it is necessary to different electric-type strain transducers respectively to rail
Different parts detected, and limited by factors such as position, times.Simultaneously when train is with more than 60,000 ms/h
When speed passes through, vibrate larger, influence the precision of measurement, tradition electricity strain gauge transducer has that sensitivity is low and zero point in addition
The big problem of drift, has larger non-linear under big strain regime, also have that electromagnetic interference, corrosion resistance are poor, allow to lead to
Cross the low defect of speed.
The domestic detection to railroad wheel surface at present is largely dependent upon manually, and detection technique falls behind, operating efficiency
Low, labour intensity is big, and easily produces artificial detection error, it is impossible to quick, accurate to grasp wheel to state, while being not easy to information
Management.Another method conventional for wheel tread flaw detection is magnaflux.Magnetic powder inspection is a kind of detection workpiece table
The lossless detection method of planar defect, is characterized in that sensitivity is high, simple to operate.But when wheel is checked, it can only be detected
The extremely shallow scope in surface, and sentence wound and manually to carry out, the static state flaw detection by hand of wheel is only applicable in this way.In wheel
In the case of not disintegrating, because wheel is blocked by miscellaneous part and rail bottom branch, therefore wheel and its tread are carried out completely
Magnetic particle inspection is impossible.Magnaflux is only applicable in wheel factory or larger Lu Nei maintenance factories, before assembling
Or the inspection of the wheel after disintegrating, it is generally used to check the surface defect of wheel rim and auxiliary plate.
In sum, for current technology, rolling stock is weighed typically all separately to be carried out with wheel tread flaw detection,
And the quick dynamic weighing of vehicle and the flaw detection of dynamic wheel tread are unable to reach, waste time and energy, and it is relatively costly.
The content of the invention
It is quick to the real-time dynamic of train to realize it is an object of the invention to provide a kind of train dynamic weighing method and device
The purpose weighed, and realize carrying out train the effect of real-time wheel tread flaw detection during weighing herein.
To achieve the above object, the invention provides following scheme：
A kind of train dynamic weighing method, including：
N number of fiber-optic grating sensor group is opened, the N is positive integer, and each described fiber-optic grating sensor group includes four
Individual fiber-optic grating sensor；The fiber-optic grating sensor group is arranged on rail bottom branch with two fiber-optic grating sensors as one group
Inside and outside；
When train passes through, the wavelength shift that the fiber-optic grating sensor group is produced is obtained；
The wavelength shift is converted into train weight information；
Judge whether the train weight information meets train load limit condition, obtain the first judged result；
If first judged result is expressed as the train weight information meets train load limit condition, it is determined that institute
State train normally travel；
If first judged result is expressed as the train weight information and does not meet train load limit condition, it is determined that
The train is travelled extremely.
Optionally, if first judged result is expressed as the train weight information and does not meet train load limit
Condition, specifically includes：
The train weight information includes axle weight information and wheel loading information；
Train loading capacity is calculated according to axle weight information；
Judge that whether the train loading capacity, beyond default train load-carrying threshold value, obtains the second judged result；
If second judged result is expressed as the train loading capacity beyond default train load-carrying threshold value, it is determined that institute
State train overload.
Optionally, it is described that train loading capacity is calculated according to axle weight information, also include afterwards：
Judge that whether the wheel loading information, beyond default train wheel load-carrying threshold value, obtains the 3rd judged result；
If the 3rd judged result is expressed as the wheel loading information beyond default train wheel load-carrying threshold value,
Determine the train unbalance loading.
Optionally, before the N number of fiber-optic grating sensor group of unlatching, also include：
Open fiber grating triggering sensing group；The fiber grating triggering sensing group has two fiber grating triggering sensings
Device, two fiber grating trigger sensors are separately mounted to two inner sides of rail bottom branch；
Judge whether the fiber grating triggering sensing group receives the stress signal produced by train, obtain the 4th judgement
As a result；
If the 4th judged result is expressed as fiber grating triggering sensing group and receives stress produced by train
Signal, then open N number of fiber-optic grating sensor group.
Optionally, it is described that the wavelength shift is converted into after train weight information, also include：
The vibrational waveform of wheel is generated according to the wavelength shift；
Judge whether the frequency of the vibrational waveform exceedes predetermined threshold value, obtain the 5th judged result；
If the frequency that the 5th judged result is expressed as the vibrational waveform exceedes predetermined threshold value,
The type of wheel damage is determined according to different vibrational waveforms.
Optionally, it is described judge whether the wheel loading information meets train load limit condition after, also include：
Obtain the time interval that the fiber-optic grating sensor group gathers signal；
Obtain the wheelbase information in two neighboring compartment；
The road speed of the train is calculated according to the time interval and the wheelbase information.
A kind of train dynamic weigher, the weighing device uses the Weighing method of claim 1：Including：
N number of fiber-optic grating sensor group is opened, the N is positive integer, and each described fiber-optic grating sensor group includes four
Individual fiber-optic grating sensor；The fiber-optic grating sensor group is arranged on inside and outside two rail bottom branch；
When train passes through, the wavelength shift that the fiber-optic grating sensor group is produced is obtained；
The wavelength shift is converted into train weight information；
Train loading capacity is calculated according to the train weight information；
Judge that whether the train loading capacity, beyond default train load-carrying threshold value, obtains the first judged result；
If first judged result is expressed as the train loading capacity beyond default train load-carrying threshold value, it is determined that institute
State train overload；
The weighing device, specifically includes：It is wideband light source, optical fiber, coupler, photo-detector, optical splitter, demodulating equipment, logical
Letter system, data processing centre, optical fibre optical grating sensing array；
The input of the wideband light source is connected with the data processing centre, and the data processing centre is used for configuring light
The parameter in source；
The output end of the wideband light source is connected with the input of the coupler by optical fiber；
The coupled end of the coupler is linked together with the optical fibre optical grating sensing array by the optical fiber；The light
Fine grating sensing array is by N number of fiber grating trigger sensor, N number of fiber Bragg grating strain sensor, N number of light
Fine grating vibration sensor group into；
The output end of the coupler is connected with the input of the photo-detector；
The output end of the photo-detector is connected with the optical splitter；
18 output channels of the optical splitter are connected to the input channel of the demodulating equipment, the demodulation dress
The output channel put carries out two-way communication by the communication system with the data processing centre, realizes transmission data and control
Equipment is carried out simultaneously.
Optionally, the optical fibre optical grating sensing array is specifically included：2 fiber grating trigger sensors, 8 fiber gratings
Strain transducer, 8 optical fiber raster vibration sensors；
The fiber grating trigger sensor, the fiber Bragg grating strain sensor and the optical fiber raster vibration sensor
Between be attached by optical fiber.(per two adjacent fiber-optic grating sensors)
Optionally, the optical fibre optical grating sensing array is specifically included：
2 fiber grating trigger sensors are separately mounted to two inner sides of rail bottom branch, constitute starter；
Every 2 fiber Bragg grating strain sensors are one group, and a fiber Bragg grating strain sensor is arranged on one
Bar rail bottom branch outside, another described fiber Bragg grating strain sensor is arranged on another outside of rail bottom branch, two institutes
The line of fiber Bragg grating strain sensor is stated perpendicular to wherein one rail；
Every 2 optical fiber raster vibration sensors are one group, and an optical fiber raster vibration sensor is arranged on one
Bar rail bottom branch inner side, another described optical fiber raster vibration sensor is arranged on another inner side of rail bottom branch, two institutes
The line of optical fiber raster vibration sensor is stated perpendicular to wherein one rail.
Optionally, the optical fibre optical grating sensing array is specifically included：
Line between the fiber Bragg grating strain sensor and the optical fiber raster vibration sensor is perpendicular to wherein one
Bar rail.
According to the specific embodiment that the present invention is provided, the invention discloses following technique effect：The present invention utilizes optical fiber light
Grid trigger sensor determines whether that train passes through, and high speed dynamic weighing is carried out to train using fiber Bragg grating strain sensor,
Judge whether train the phenomenon of overload or unbalance loading occurs, realize detecting train wheel tread using optical fiber raster vibration sensor
Positioned with tread is damaged, moreover it is possible to which the information returned according to multiple optical fiber raster vibration sensors is carried out to the travel speed of train
Measurement in real time.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is embodiment of the present invention Weighing method flow chart；
Fig. 2 is embodiment of the present invention weighting device structure figure；
Fig. 3 is that the single fiber-optic grating sensor of the embodiment of the present invention installs profile.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It is an object of the invention to provide a kind of train dynamic weighing method and device, can realize fast to the real-time dynamic of train
The purpose that speed is weighed.
It is below in conjunction with the accompanying drawings and specific real to enable the above objects, features and advantages of the present invention more obvious understandable
The present invention is further detailed explanation to apply mode.
Fig. 1 is embodiment of the present invention Weighing method flow chart, as shown in figure 1, a kind of train dynamic weighing method, including：
Step 101：N number of fiber-optic grating sensor group is opened, the N is positive integer, each described fiber-optic grating sensor
Group includes four fiber-optic grating sensors；The fiber-optic grating sensor group is arranged on two fiber-optic grating sensors as one group
Inside and outside the branch of rail bottom, the fiber-optic grating sensor specifically includes fiber Bragg grating strain sensor and optical fiber raster vibration
Sensor；
Step 102：When train passes through, the wavelength shift that the fiber-optic grating sensor group is produced is obtained；
Step 103：The wavelength shift is converted into train weight information；
Step 104：Judge whether the train weight information meets train load limit condition, if so, performing step
105, step 106 is performed if not；
Step 105：Determine the train normally travel；
Step 106：Determine that the train is travelled extremely.
Wherein, the specific profit of step 104 carries out judging whether train weight information meets train load limit with the following method
Condition：The train weight information includes axle weight information and wheel loading information；Train is calculated according to axle weight information
Loading capacity；Whether the train loading capacity is judged beyond default train load-carrying threshold value, if, it is determined that the train overload；
Whether the wheel loading information is judged beyond default train wheel load-carrying threshold value, if so, determining the train unbalance loading.
The present invention is the wavelength shift by demodulating fiber Bragg grating strain sensor generation, and by being integrated with algorithm
Software analysis system above-mentioned wavelength shift is converted into axle weight information and each wheel loading information, four axles weight information are folded
Plus train load-carrying can be measured, so as to judge whether train overloads or unbalance loading.
Using above-mentioned Weighing method of the invention, high speed dynamic weighing can be realized, it is desirable to which train speed is not higher than 150km/h
So that apparatus of the present invention influence very little, Lifting Convey efficiency not to be limited by factors such as position, times, energy railway traffic
Enough dynamics measure train with the presence or absence of overload, the problem of unbalance loading.
In actual applications, before the N number of fiber-optic grating sensor group of unlatching, first turn on fiber grating triggering and pass
Sense group；The fiber grating triggering sensing group has two fiber grating trigger sensors, and two fiber grating triggerings are passed
Sensor is separately mounted to two inner sides of rail bottom branch；When fiber grating triggering sensing group receives train answering produced by
During force signal, represent that train will sail test zone into, then open N number of fiber-optic grating sensor group, passed when fiber grating is triggered
When sense group does not experience signal, whole fiber bragg grating sensing device does not work, by increasing capacitance it is possible to increase each fiber grating in the present invention
The service life of sensor and device.
In actual applications, the wavelength shift is converted into after train weight information described, is also included：According to
The wavelength shift generates the vibrational waveform of wheel；The type of wheel damage is determined according to different vibrational waveforms.
The present invention is the wavelength shift produced according to optical fiber raster vibration sensor, by the software point for being integrated with algorithm
Above-mentioned wavelength shift is converted into vibrational waveform by analysis system, and whether wheel is carried out beyond decision threshold using the frequency of vibration
Flaw detection, the type of wheel damage is determined according to different vibrational waveforms.
In actual applications, whether the wheel loading information is judged after the train wheel loading ga(u)ge described,
Also include：Obtain the time interval that the fiber-optic grating sensor group gathers signal；Obtain the wheelbase information in two neighboring compartment；
The road speed of the train is calculated according to the time interval and the wheelbase information.
Specifically, when wheel is by optical fiber raster vibration sensor, fiber-optic grating sensor collection signal, when wheel not
During by optical fiber raster vibration sensor, fiber-optic grating sensor does not gather signal, it is possible to according to the signal for collecting
Time interval, the road speed of train is calculated in conjunction with wheelbase information.
Fig. 2 is embodiment of the present invention weighting device structure figure, as shown in Fig. 2 a kind of train dynamic weigher, specific bag
Include：Wideband light source 1, optical fiber 2, optical fibre optical grating sensing array 3, coupler 4, photo-detector 5, optical splitter 6, demodulating equipment 7, communication
System 8, data processing centre 9；
The input of the wideband light source 1 is connected with the data processing centre 9, and the data processing centre 9 is used for matching somebody with somebody
Put the parameter of light source；The output end of the wideband light source 1 is connected with the input of the coupler 4 by optical fiber 2；The coupling
The coupled end of device 4 is linked together with the optical fibre optical grating sensing array 3 by the optical fiber 2；The optical fiber grating sensing battle array
Row 3 are by N number of fiber grating trigger sensor, N number of fiber Bragg grating strain sensor, N number of optical fiber raster vibration
Sensor group into；The output end of the coupler 4 is connected with the input of the photo-detector 5；The output of the photo-detector 5
End is connected with the optical splitter 6；18 output channels of the optical splitter 6 are connected to one end of the demodulating equipment 7,
The other end of the demodulating equipment 7 carries out two-way communication by the communication system 8 with the data processing centre 9, realizes passing
Carried out while transmission of data and control device.
Weighing device in the present invention is portable set, is not limited by place, and rail is had no effect, and is maintained easily
And management；High speed dynamic weighing can be realized, very small is influenceed on railway traffic；Apparatus of the present invention not only can dynamically claim simultaneously
Weight, can also realize that dynamic wheel tread is detected a flaw, and more ensure railway operation safety；The (FBG) demodulator of apparatus of the present invention belongs at a high speed
(FBG) demodulator, can simultaneously measure and demodulate multiple physical parameters, including train weight, unbalance loading situation, wheel tread crackle, non-round
Degree, polygonization equivalent damage, away from parameters such as the, speeds of service, practical, cost performance is high, and is embedded with (FBG) demodulator for train shaft
Communication module, can be with real-time Transmission metrical information；The device is installed and removed very quick and convenient, it is only necessary to a staff
, greatly save manpower；The software analysis system of the device can analysis measurement is arrived in real time various physical quantitys, and will point
Analysis result sends train controlling center in real time, so that train controlling center carries out train management and control in time；Device
Can effectively reduce and even eliminate because of the influence that temperature and running velocity are brought by measurement remaining parameter.
In actual applications, the optical fibre optical grating sensing array is specifically included：2 fiber grating trigger sensors, 8 light
Fiber grating strain transducer, 8 optical fiber raster vibration sensors；The fiber grating trigger sensor, the fiber grating should
Become and be attached by optical fiber between sensor and the optical fiber raster vibration sensor, per two adjacent optical fiber grating sensings
Device can concatenate multiplexing on an optical fiber；2 fiber grating trigger sensors are separately mounted to what two rail bottoms were propped up
Inner side, constitutes starter；Every 2 fiber Bragg grating strain sensors are one group, a fiber grating strain sensor
Device is arranged on a rail bottom branch outside, and another described fiber Bragg grating strain sensor is arranged on the outer of another rail bottom branch
Side, two lines of the fiber Bragg grating strain sensor are perpendicular to wherein one rail；Every 2 optical fiber raster vibrations are passed
Sensor is one group, and an optical fiber raster vibration sensor is arranged on rail bottom branch inner side, another described optical fiber light
Grid vibrating sensor is arranged on the inner side of another rail bottom branch, two lines of the optical fiber raster vibration sensor perpendicular to
Wherein one rail；Line between the fiber Bragg grating strain sensor and the optical fiber raster vibration sensor is perpendicular to it
In a rail；The every 2 symmetrical fiber Bragg grating strain sensors and every 2 symmetrical optical fiber grating vibration sensors
Device forms a fiber-optic grating sensor group；The distance between every two adjacent fiber-optic grating sensor groups are equal to the train
Spacing between the two neighboring wheel shaft in compartment.
Wherein, fiber-optic grating sensor 3-1,3-2 ..., 3-17 and 3-18 constitute optical fibre optical grating sensing array；Optical fiber light
Gate sensor 3-1,3-2 are two fiber grating trigger sensors, are used as beginning of the starter installed in detection zone；
Fiber-optic grating sensor 3-3 ..., 3-10 be fiber Bragg grating strain sensor, for carrying out high speed dynamic weighing to train；Light
Fiber grating sensor 3-11 ..., 3-18 be optical fiber raster vibration sensor, for realize wheel tread detection and damage tread
Positioning, can also realize the measurement to train vibration influence speed.This 18 fiber-optic grating sensors constitute detection zone of the invention
Domain, it is characterised in that they have different reflection wavelengths, it is preferred that detection zone can be equal to the length in train whole compartment
Degree.
Fiber grating trigger sensor 3-1 and 3-2 is clipped in the inner side of the bottom branch part of left and right rail 11, structure in symmetrical form
Into starter, fiber Bragg grating strain sensor 3-3 and 3-7 are clipped in the outside of left and right rail bottom branch part, light in symmetrical fashion
Fine grating vibration sensor 3-11 and 3-15 are clipped in the left and right rail bottom branch part with 3-3 and 3-7 correspondence positions in symmetrical fashion
Inner side, they constitute first fiber-optic grating sensor group, similarly, 3-4,3-8,3-12,3-16 constitute second optical fiber light
Gate sensor group, 3-5,3-9,3-13,3-17 constitutes the 3rd fiber-optic grating sensor group, and 3-6,3-10,3-14,3-18 is constituted
The distance between 4th fiber-optic grating sensor group, every two neighboring fiber-optic grating sensor group are whole compartment per adjacent two
Spacing between individual wheel shaft 10.
Concrete operation step：
1) Fiber Bragg Grating Sensor Array is installed as requested, and data processing centre 9 controls the light source of high speed (FBG) demodulator
Light wave is sent by particular sample frequency；
2) when train passes through, Fiber Bragg Grating Sensor Array gathered data, each fiber-optic grating sensor will be collected
Information (wavelength shift) be reflected back in the demodulation transposition 7 of high speed (FBG) demodulator by optical fiber 2；
3) demodulating equipment 7 can go out each fiber Bragg grating strain sensor in optical fibre optical grating sensing array and reflect with Real-time demodulation
The wavelength shift returned, and wavelength shift is converted into axle weight information and every by being integrated with the software analysis system of algorithm
Individual wheel loading information.Four axle weight information superpositions can measure train load-carrying, contrast train car loading ga(u)ge to judge fire
Whether car overloads, each wheel loading information can be used to judge train whether unbalance loading.
4) demodulating equipment 7 can go out each optical fiber raster vibration sensor in optical fibre optical grating sensing array and reflect with Real-time demodulation
The wavelength shift returned, and wavelength shift is converted into shaking for each wheel by being integrated with the software analysis system of algorithm
Whether dynamic waveform, frequency according to vibration carries out detecting flaw of wheel more than decision threshold, and different vibrational waveforms can be represented not
Same wheel damage, the type of wheel damage is judged with this；When wheel is by optical fiber raster vibration sensor, fiber grating
Sensor gathers signal, and when wheel is without optical fiber raster vibration sensor, fiber-optic grating sensor does not gather signal, so
The road speed of train can be calculated in conjunction with wheelbase information according to the time interval of the signal for collecting.
5) information after demodulating can in real time be sent to the data processing centre of train controlling center by communication system 8
9, realize remote control and management；
6) there are the software systems of our independent developments, the letter that can be collected to high speed (FBG) demodulator in data processing centre 9
Breath is analyzed and processed in real time, and this software systems is simple to operate, and staff can quickly grasp its usage, so as to accurately detect and claim
Whether weight is measured in normal range (NR), conveniently instructs on-site personnel to take corresponding measure.
Fig. 3 is that the single fiber-optic grating sensor of the embodiment of the present invention installs profile, as shown in figure 3, rail 11, support bottom
Seat 12, rotatable screw 13；
The support base 12 has two grooves of size；Big groove matches with rail bottom branch, and little groove is used for
Fixed fiber-optic grating sensor, the fiber-optic grating sensor includes fiber grating trigger sensor, fiber grating strain sensor
Device and optical fiber raster vibration sensor；The support base top has circular hole, and institute is fixed for the rotatable screw 13
State the bottom branch of rail 11.
By taking the situation (such as 3-3 and 3-11) that fiber-optic grating sensor is all installed in outside in the branch of single rail bottom as an example, such as Fig. 3
Shown, rail bottom branch herein is the profile of rail 11 in Fig. 2.This figure unites fiber-optic grating sensor 3-3 ... ..., 3-18
Referred to as fiber-optic grating sensor 3,12 is the support base of fiber-optic grating sensor 3, for protecting and fixing optical fiber grating sensing
Device 3,13 is a rotatable screw, and the base 12 that it is used for will be equipped with fiber-optic grating sensor 3 is fixed on the bottom branch of rail 11
Part, support base 12 and rotatable screw 13 constitute an instrument similar to fixture, for by fiber-optic grating sensor 3 with
The bottom branch of rail 11 is brought into close contact together, while easy disassembly, the method that fiber-optic grating sensor is installed in interior outside is consistent.It is right
Method in the installation method of fiber grating trigger sensor 3-1 or 3-2 is referred to Fig. 3, but only select in rail bottom branch
Install inner side.
This mounting means can more easily install or remove fiber-optic grating sensor, compared to cost in the prior art
Height, for the method for detection of unitary function or device, is more convenient to carry, and saves manpower, the letter that Real-time demodulation and transmission measurement are arrived
Breath largely ensures train traffic safety to train controlling center.
In actual applications, the optical fibre optical grating sensing array is arranged in the branch of rail bottom, the wideband light source, institute
State coupler, the photo-detector, the optical splitter, the demodulating equipment, the communication system and the Data processing
The heart is not installed at the scene.
In real life, there are two bogies in common compartment, and four wheels are right, so a section compartment has eight wheels.
Each wheel bottom rail bottom branch on be fitted with a pair of fiber-optic grating sensors, be respectively fiber Bragg grating strain sensor and
Optical fiber raster vibration sensor, therefore can realize being measured while eight wheel weights and wheel condition.When vehicle is travelled from left to right
When, when will reach detection zone, experience stress by a pair of fiber grating trigger sensors 3-1 and 3-2 of foremost and believe
Number, system is learnt that vehicle will be by detection zone, then the fiber grating in other four fiber-optic grating sensor groups is passed
Sensor is started working, and the branch strain of rail bottom and vibration when passing through to vehicle carry out real-time detection, every a pair of optical fiber raster vibrations
Sensor can continuous acquisition through wheel tread vibration information, four pairs of detection zones of optical fiber raster vibration sensor can cover
The tread of the whole all wheels in section compartment is covered, can realize that wheel tread is detected a flaw after all of vibration information is merged；When last two
When experiencing strain signal to fiber Bragg grating strain sensor, illustrate that whole section compartment overlaps with detection zone just, four pairs this moment
Fiber Bragg grating strain sensor is while measuring strain information, realizes that eight wheel weight same times measure.Passed when fiber grating is triggered
When sensor does not experience signal, whole fiber grating sensing system does not work, and can so increase the use longevity of our devices
Life.
Sample frequency demodulating equipment high, is realize dynamic weighing and vibration measurement basic.Detecting flaw of wheel can be according to visitor
Family demand periodic detection, without carrying out carrying out flaw detection every time, the service life of optical fiber raster vibration sensor is increased with this.
The present invention can realize high speed dynamic weighing, while integrating various functions such as detecting flaw of wheel；Portable set,
Easy disassembly, saves manpower；The information that Real-time demodulation and transmission measurement are arrived largely ensures train to train controlling center
Traffic safety.
The application can realize following technique effect for the problems of the prior art：
1) for the problem of high cost in the prior art
Core component of the invention include several fiber-optic grating sensors and a high-speed multiple channel (FBG) demodulator, low cost,
Long service life, substantially without later maintenance.Install quick and convenient, save human cost.
2) for the problem of unitary function in the prior art
The present invention is gathered multi -function in integral whole, including dynamic measurement train can weigh simultaneously, overloads, and unbalance loading, wheel is visited
The information such as wound, train speed measurement.
3) for non-portable problem in the prior art
The present invention is portable set, and maintenance and management is easy in easy disassembly, and application scenario is not limited to.
4) for high speed dynamic weighing problem cannot be realized
(FBG) demodulator in the present invention is high-speed multiple channel (FBG) demodulator, and sample frequency can be adjusted according to the actual requirements,
The demodulating algorithm that sample frequency combination high can reach real-time can well realize high speed dynamic weighing problem.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Specific case used herein is set forth to principle of the invention and implementation method, and above example is said
It is bright to be only intended to help and understand the method for the present invention and its core concept；Simultaneously for those of ordinary skill in the art, foundation
Thought of the invention, will change in specific embodiments and applications.In sum, this specification content is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of train dynamic weighing method, it is characterised in that including：
N number of fiber-optic grating sensor group is opened, the N is positive integer, and each described fiber-optic grating sensor group includes four light
Fiber grating sensor；The fiber-optic grating sensor group is one group and is arranged in the branch of rail bottom with two fiber-optic grating sensors
Outer both sides；The fiber-optic grating sensor group is a part for optical fibre optical grating sensing array, and the optical fibre optical grating sensing array is by N
The individual fiber grating trigger sensor, N number of fiber Bragg grating strain sensor, N number of optical fiber raster vibration sensor
Composition；
When train passes through, the wavelength shift that the fiber-optic grating sensor group is produced is obtained；
The wavelength shift is converted into train weight information；
Judge whether the train weight information meets train load limit condition, obtain the first judged result；
If first judged result is expressed as the train weight information meets train load limit condition, it is determined that the fire
Car normally travel；
If first judged result is expressed as the train weight information and does not meet train load limit condition, it is determined that described
Train is travelled extremely.
2. Weighing method according to claim 1, it is characterised in that if first judged result be expressed as it is described
Train weight information does not meet train load limit condition, specifically includes：
The train weight information includes axle weight information and wheel loading information；
Train loading capacity is calculated according to axle weight information；
Judge that whether the train loading capacity, beyond default train load-carrying threshold value, obtains the second judged result；
If second judged result is expressed as the train loading capacity beyond default train load-carrying threshold value, it is determined that the fire
Car overloads.
3. Weighing method according to claim 2, it is characterised in that described that train is calculated according to axle weight information
Loading capacity, also includes afterwards：
Judge that whether the wheel loading information, beyond default train wheel load-carrying threshold value, obtains the 3rd judged result；
If the 3rd judged result is expressed as the wheel loading information beyond default train wheel load-carrying threshold value, it is determined that
The train unbalance loading.
4. Weighing method according to claim 1, it is characterised in that before the N number of fiber-optic grating sensor group of unlatching,
Also include：
Open fiber grating triggering sensing group；The fiber grating triggering sensing group has two fiber grating trigger sensors,
Two fiber grating trigger sensors are separately mounted to two inner sides of rail bottom branch；
Judge whether the fiber grating triggering sensing group receives stress signal produced when train passes through, obtain the 4th and sentence
Disconnected result；
If the 4th judged result is expressed as fiber grating triggering sensing group and receives stress signal produced by train,
Then open N number of fiber-optic grating sensor group.
5. Weighing method according to claim 1, it is characterised in that described the wavelength shift is converted into train to carry
After weight information, also include：
The vibrational waveform of wheel is generated according to the wavelength shift；
Judge whether the frequency of the vibrational waveform exceedes predetermined threshold value, obtain the 5th judged result；
If the frequency that the 5th judged result is expressed as the vibrational waveform exceedes predetermined threshold value,
The type of wheel damage is determined according to different vibrational waveforms.
6. Weighing method according to claim 1, it is characterised in that described to judge whether the wheel loading information meets
After train load limit condition, also include：
Obtain the time interval that the fiber-optic grating sensor group gathers signal；
Obtain the wheelbase information in two neighboring compartment；
The road speed of the train is calculated according to the time interval and the wheelbase information.
7. a kind of train dynamic weigher, it is characterised in that specifically include：Wideband light source, optical fiber, coupler, photo-detector,
Optical splitter, demodulating equipment, communication system, data processing centre, optical fibre optical grating sensing array；
The input of the wideband light source is connected with the data processing centre, and the data processing centre is used for configuring light source
Parameter；
The output end of the wideband light source is connected with the input of the coupler by optical fiber；
The coupled end of the coupler is linked together with the optical fibre optical grating sensing array by the optical fiber；The optical fiber light
Grid sensor array is by N number of fiber grating trigger sensor, N number of fiber Bragg grating strain sensor, N number of optical fiber light
Grid vibrating sensor is constituted；
The output end of the coupler is connected with the input of the photo-detector；
The output end of the photo-detector is connected with the optical splitter；
18 output channels of the optical splitter are connected to the input channel of the demodulating equipment, the demodulating equipment
Output channel carries out two-way communication by the communication system with the data processing centre, realizes transmission data and control device
Carry out simultaneously.
8. weighing device according to claim 7, it is characterised in that the optical fibre optical grating sensing array is specifically included：2
Fiber grating trigger sensor, 8 fiber Bragg grating strain sensors, 8 optical fiber raster vibration sensors；
The fiber grating trigger sensor, between the fiber Bragg grating strain sensor and the optical fiber raster vibration sensor
It is attached (per two adjacent fiber-optic grating sensors) by optical fiber.
9. weighing device according to claim 8, it is characterised in that the optical fibre optical grating sensing array is specifically included：
2 fiber grating trigger sensors are separately mounted to two inner sides of rail bottom branch, constitute starter；
Every 2 fiber Bragg grating strain sensors are one group, and a fiber Bragg grating strain sensor is arranged on an iron
Flange of rail branch outside, another described fiber Bragg grating strain sensor is arranged on another outside of rail bottom branch, two light
The line of fiber grating strain transducer is perpendicular to wherein one rail；
Every 2 optical fiber raster vibration sensors are one group, and an optical fiber raster vibration sensor is arranged on an iron
Flange of rail branch inner side, another described optical fiber raster vibration sensor is arranged on another inner side of rail bottom branch, two light
The line of fine grating vibration sensor is perpendicular to wherein one rail.
10. weighing device according to claim 9, it is characterised in that the optical fibre optical grating sensing array is specifically included：
Line between the fiber Bragg grating strain sensor and the optical fiber raster vibration sensor is perpendicular to wherein one iron
Rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710277291.2A CN106932068A (en) | 2017-04-25 | 2017-04-25 | A kind of train dynamic weighing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710277291.2A CN106932068A (en) | 2017-04-25 | 2017-04-25 | A kind of train dynamic weighing method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106932068A true CN106932068A (en) | 2017-07-07 |
Family
ID=59438347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710277291.2A Withdrawn CN106932068A (en) | 2017-04-25 | 2017-04-25 | A kind of train dynamic weighing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106932068A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987137A (en) * | 2019-12-13 | 2020-04-10 | 武汉理工大学 | Mining vehicle weighing system and method based on fiber bragg grating sensor |
| CN113739891A (en) * | 2021-08-30 | 2021-12-03 | 西北铁道电子股份有限公司 | Sensor assembly for dynamic weighing of train and weighing method |
| CN116358679A (en) * | 2023-05-16 | 2023-06-30 | 中铁大桥局集团有限公司 | Dynamic weighing method for urban rail transit train bridge |
-
2017
- 2017-04-25 CN CN201710277291.2A patent/CN106932068A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987137A (en) * | 2019-12-13 | 2020-04-10 | 武汉理工大学 | Mining vehicle weighing system and method based on fiber bragg grating sensor |
| CN113739891A (en) * | 2021-08-30 | 2021-12-03 | 西北铁道电子股份有限公司 | Sensor assembly for dynamic weighing of train and weighing method |
| CN113739891B (en) * | 2021-08-30 | 2024-01-26 | 西北铁道电子股份有限公司 | Sensor assembly for dynamic weighing of train and weighing method |
| CN116358679A (en) * | 2023-05-16 | 2023-06-30 | 中铁大桥局集团有限公司 | Dynamic weighing method for urban rail transit train bridge |
| CN116358679B (en) * | 2023-05-16 | 2024-04-23 | 中铁大桥局集团有限公司 | Dynamic weighing method for urban rail transit train bridge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Filograno et al. | Real-time monitoring of railway traffic using fiber Bragg grating sensors | |
| McGetrick et al. | Theoretical investigation of the use of a moving vehicle to identify bridge dynamic parameters | |
| CN101830237B (en) | Safe and real-time detection system and method of heavy haulage lines based on optical fiber sensor network | |
| Filograno et al. | Wheel flat detection in high-speed railway systems using fiber Bragg gratings | |
| Chen et al. | Damage detection of highway bridges based on long-gauge strain response under stochastic traffic flow | |
| Lai et al. | Development of a Fiber‐Optic Sensing System for Train Vibration and Train Weight Measurements in Hong Kong | |
| CN102092406A (en) | Optical fiber grating sensed train wheel tread state online monitoring system | |
| Tam et al. | Utilization of fiber optic Bragg Grating sensing systems for health monitoring in railway applications | |
| CN108845028A (en) | A kind of rail in high speed railway wave mill dynamic testing method and device | |
| CN111060270B (en) | Movable rapid monitoring and intelligent evaluation method for urban viaduct | |
| CN206656789U (en) | A kind of train dynamic weigher | |
| CN105292177A (en) | Method for measuring track corrugation by utilizing axle box vibration and impact information | |
| CN106932068A (en) | A kind of train dynamic weighing method and device | |
| CN102108657A (en) | Method and device for monitoring state of ballastless track structure through fibber bragg grating sensing | |
| CN107131843A (en) | A kind of colliery cage guide damage deformation on-line monitoring system and method based on optical fiber grating sensing | |
| CN101672687B (en) | Device for testing railway wagon overloading and unbalance loading by foundationless-tunnel fiber and method | |
| CN104374465A (en) | Subway low-frequency vibration test device and method based on fiber bragg grating sensors | |
| Boogaard et al. | In situ measurements of the crossing vibrations of a railway turnout | |
| CN101266190A (en) | Normal traffic flow stayd-cable bridge mode parametric measurement device and method | |
| CN102252627B (en) | Gauge detection device and detection method for high-speed railway track | |
| CN104764622A (en) | Bridge state detection device and detection method | |
| Iwnicki et al. | Out-of-round railway wheels and polygonisation | |
| Mishra et al. | Real time implementation of fiber Bragg grating sensor in monitoring flat wheel detection for railways | |
| CN110926735A (en) | Bridge structure rapid diagnosis method based on multidimensional dynamic parameters | |
| Zeng et al. | A vibration-based traffic monitoring system using distributed optical sensing technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170707 |
|
| WW01 | Invention patent application withdrawn after publication |