CN107957285A - A kind of railway Super leaning load system and detection method - Google Patents
A kind of railway Super leaning load system and detection method Download PDFInfo
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- CN107957285A CN107957285A CN201810022513.0A CN201810022513A CN107957285A CN 107957285 A CN107957285 A CN 107957285A CN 201810022513 A CN201810022513 A CN 201810022513A CN 107957285 A CN107957285 A CN 107957285A
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- 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
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Abstract
A kind of railway ultra-deviation load detection system and method,Including rail,Two sampled points are all respectively arranged with the both sides per one steel rail web between each two sleeper,Sampled point per side is symmetrical arranged relative to rail,Tilted on each sampled point and be fixedly installed an optical fiber sensing element,And the sampled point is arranged on the natural axis of rail,Two optical fiber sensing elements layout of per share rail homonymy is in 90 ° of angles,Optical fiber sensing element is arranged on the sampled point of natural axis,So that rail is in stress deformation,The output of optical fiber sensing element is shearing waveform,Two optical fiber sensing elements in rail the same side are set in 90 ° of angles,Ensure when Super leaning load detects,The shearing waveform of two optical fiber sensing elements is complementary,Collectable collection section in whole detection process is formed with this,It ensure that the accuracy of detection,And the sampled point per side is symmetrical arranged relative to rail,Disturbed with the rolling pendulum that this overcomes the snakelike operation of train to produce.
Description
Technical field
The present invention relates to railway Super leaning load detection field, more particularly to a kind of railway Super leaning load system and detection method.
Background technology
Railway ultra-deviation load detection system is a kind of weight calculation safety guarantee equipment for rail transportation system.Existing railway
Plate type sensor and shear force sensor has been used in combination in ultra-deviation load detection system, and the main of metering weight calculation is used as using plate type sensor
Means, using shear force sensor as meter shaft identification facility with weight calculation supplementary means, complete the overload to running vehicle and unbalance loading
Measurement.Wherein, plate type sensor and shear force sensor all employ foil gauge this traditional mechanics sensing element, will strain
Piece is attached on steel resilient support, then is installed on railway.During specific installation, with reference to shown in Fig. 1, Fig. 1 is one steel
The schematic diagram of rail, another stock and the stock are symmetrical, and shear force sensor 21 is fixed on the web of the rail 12 of rail 1, and plate type sensor 22 is solid
It is scheduled on the sleeper 3 of special rail 1, specifically, after the natural axis drilling of rail 1, shear force sensor 21 is installed in hole,
The spacing of two adjacent sleepers is usually 600mm.In detection process, vehicle is from detection zone is entered to leaving detection zone
When, shearing waveform and pressure waveform that shear force sensor and plate type sensor respectively can be shown in import and export Fig. 2, will shearing waveform and
The measurement data platform section that a length is 1200mm is formed after pressure waveform synthesis.Can be to each axle of operation vehicle
Carry out weight calculation measurement.In order to ensure to the measurement accuracy of dynamic operation vehicle, it is necessary to set multiple measurement data to put down on rail
Taiwan area section.Signal after synthesis is completed to railway carriage complete vehicle weight after data processing in a manner of Axle Measuring or bogie weighing mode
And overload, the measurement and judgement of unbalance loading degree.This measurement method can reach national track scale measuring station acceptance criteria and
Practical Super leaning load measurement accuracy requirement below 70 kilometers/hour of speeds.
But there are shortcomings using this measurement method：Firstly, it is necessary to use special sleeper（Concrete crosstie or steel
Pillow）, i.e. when installing this ultra-deviation load detection system on railway, with special sleeper replacement regular sleeper, site operation amount is very
Greatly；Secondly, the cost using plate type sensor made of foil gauge is higher；Again, when shear force sensor is installed, it is necessary in rail
Drill on the web of the rail, destroy the structural strength of rail, reduce the life cycle of rail, there are some potential safety problems, and this
It is that railway department resolutely opposes.
Since this measurement method is there are disadvantages mentioned above, industry always searches for substituting the new measurement of this measurement method：
One of prior art is to carry out Super leaning load detection only with shear force sensor.For example, the offer of ROGERS CORPORATION of the U.S. is super inclined
Carry detecting system, it uses foil gauge to make shear force sensor, by shear force sensor glue sticking or be welded in 15 meters of long steel
On the rail web of the rail；Chinese Ke Li companies also make cambered surface shear force sensor using foil gauge, by cambered surface shear force sensor with certain
Spacing is fixed on the web of the rail of special rail.Above two mode is avoided drill on rail the drawbacks of, eliminates special rail
Pillow and the form of construction work of plate type sensor combination, but also there are following drawback, group is pre-machined first, must replace at the scene
The special rail installed, very tight to live sleeper pitch requirements, site operation amount is still very big.Second, traditional sensor resists
Electromagnetic interference capability is weaker, and signal transmission distance is near, easily by lightning stroke effect breakdown.In addition, the glue of ROGERS CORPORATION of the U.S.
Special, of high cost, welding is that full weld is high to bonding plane processing request, and gluing life cycle is limited；Chinese Ke Li companies adopt
Cambered surface shear force sensor is welded on the web of the rail with argon arc welding, but is explicitly indicated that not in the track circuit national standard of construction site
Allow to be welded with forceful electric power.
Another prior art is the Chinese invention patent application of my company Publication No. CN105444853A, this application file
Disclose a kind of using optical fiber detector of the rail as elastomer, it includes shearing detection device and pressure-detecting device,
Detection device is sheared by the way that optical fiber sensing element is fixedly installed respectively in the both sides of steel rail web；Pressure-detecting device passes through board-like
Optical fiber sensing element is fixedly installed in elastomer, and plank frame is placed between rail and sleeper, by measuring rail at the same time
Shearing force and pressure realize the detection to railway Super leaning load.This application file is using fibre optical sensor as measuring cell
Make data accuracy and the anti-electromagnetic interference capability of measurement stronger.But this mode stills need to replace special sleeper and plate
Formula sensor, construction work amount are very big.
The content of the invention
It is an object of the present invention to providing a kind of railway Super leaning load measuring system, according to the installation site of sensing element
And quantity, play the precision higher to the detection of railway Super leaning load.
The present invention above-mentioned purpose technical scheme is that：
A kind of railway ultra-deviation load detection system, including rail, between each two sleeper per one steel rail web both sides on all
Two sampled points are respectively arranged with, the sampled point per side is symmetrical arranged relative to rail, and fixed setting is tilted on each sampled point
There is an optical fiber sensing element, and the sampled point is arranged on the natural axis of rail, two optical fiber of per share rail homonymy are quick
Sensing unit layout is in 90 ° of angles.
By using above-mentioned technical proposal, optical fiber sensing element is arranged on the sampled point of natural axis so that rail exists
During stress deformation, the output of optical fiber sensing element is shearing waveform, and two optical fiber sensing elements in rail the same side are pressed from both sides in 90 °
Angle is set, and is ensured when Super leaning load detects, and the shearing waveform of two optical fiber sensing elements is complementary, and whole detection process is formed with this
In collectable data area, the accuracy of detection is ensure that, and the sampled point per side is symmetrical arranged relative to rail, with this
The rolling pendulum interference for overcoming the snakelike operation of train to produce.
Further, the optical fiber sensing element and rail natural axis are in 40 ~ 50 ° of angles.
It is 40 ~ 50 ° of shearings that can be gathered rail and be subject in angle by using above-mentioned technical proposal.
Further, the optical fiber sensing element and rail natural axis are in 45 ° of angles.
It is in the waveform that 45 ° of angles make output by optical fiber sensing element and rail natural axis by using above-mentioned technical proposal
Easy to calculation process.
Further, the center of the optical fiber sensing element is consistent with sampled point.
By using above-mentioned technical proposal, it is consistent the peaks and troughs of shearing waveform, easy to calculation process.
Further, the optical fiber sensing element of both sides is symmetrical arranged along rail.
Further, the spacing with two sampled points of one rail homonymy is not less than 250mm.
It is as far as possible longer on the premise of sampled point cannot be overlapped with the fulcrum of sleeper by using above-mentioned technical proposal,
Since the sleeper spacing in China is 600mm, the occupancy length of sleeper is removed, therefore sampled point is more than 250mm as far as possible.
Further, the optical fiber sensing element is scheduled on rail by cold solder connection solid welding.
By using above-mentioned technical proposal, cold welding spot welding will not destroy rail entirety metallographic structure, rail will not be caused to move back
Fire, does not influence the intensity of rail.
Further, the harvester of connection optical fiber sensing element is further included, connection harvester is sensitive to each optical fiber
The processing unit and the display device and storage device of difference connection processing device that component output signal is handled.
By using above-mentioned technical proposal, the shearing waveform of some optical fiber sensing elements is adopted by harvester
Collection, the shearing Waveform composition for recycling processing unit to collect, so as to obtain Super leaning load data, storage device is gone through for storage
History information.
It is an object of the present invention to providing a kind of railway Super leaning load detection method, according to the installation site of sensing element
And quantity, play the precision higher to the detection of railway Super leaning load.
The present invention above-mentioned purpose technical scheme is that：
A kind of railway Super leaning load detection method, comprises the following steps：
Two sampled points are all set respectively on the both sides per one steel rail web between each two sleeper, the sampled point phase per side
It is symmetrical arranged for rail, one optical fiber sensing element of fixed setting is tilted on each sampled point, and the sampled point is arranged on
On the natural axis of rail, two optical fiber sensing elements layout of per share rail homonymy is in 90 ° of angles；
The sampled point stressing conditions of the same side two are gathered by optical fiber sensing element and draw shearing waveform, merge two shear waves
Shape, obtains Super leaning load detection data；
Show super inclined side detection data.
In conclusion the invention has the advantages that：
1. need not drill on rail, rail strength is protected, improves railway security performance；
2. fibre optical sensor element cold solder connection is welded on steel rail web, compared with adhesive means, increases installation strength, improve and use
Service life；
3. without replacing special sleeper and rail, without extensive adjustment sleeper spacing, can be installed on existing railway circuit, greatly
It is big to reduce quantities, reduce cost；
4. electromagnetism interference and lightning protection properties are strong.
Brief description of the drawings
Fig. 1 is the structure diagram of one rail in background technology；
Fig. 2 is stress and the oscillogram of composite force in background technology；
Fig. 3 is the scheme of installation of railway ultra-deviation load detection system optical fiber sensing element；
Fig. 4 is rail section scheme of installation；
Fig. 5 is force analysis figure of the optical fiber sensing element in rail；
Tu6Shi roads Super leaning load force analysis figure；
Fig. 7 is optical fiber sensing element structure and solder joint scheme of installation；
Fig. 8 is railway ultra-deviation load detection system block diagram；
Fig. 9 is optical fiber sensing element connection schematic diagram.
In figure, 1, rail；11st, rail head；12nd, the web of the rail；13rd, the flange of rail；2nd, sampled point；21st, shear force sensor；22nd, board-like biography
Sensor；3rd, sleeper；4th, optical fiber sensing element；41st, optical fiber cable；42nd, solder joint.
Embodiment
The present invention is described in further detail below in conjunction with attached drawing.
Embodiment 1,
A kind of railway Super leaning load system, with reference to shown in Fig. 2 and Fig. 3, the structure of optical fiber sensing element 4 is applied on rail 1, existing
Rail 1 include the flange of rail 13, the web of the rail 12 and rail head 11；The flange of rail 13 of rail 1 is erected on sleeper 3 below, and generally adjacent two
A 3 spacing of sleeper is 600mm, and it is natural axis to have a special forced position on the web of the rail 12, and natural axis is solely subjected to shear, the unbalance loading
System sets two sampled points 2 respectively on the both sides per one 1 web of the rail 12 of rail between each two sleeper 3, per side sampled point 2
It is symmetrical arranged relative to rail 1, is tilted on each sampled point 2 and be fixedly installed an optical fiber sensing element 4, and sampled point 2 is set
Put on the natural axis of rail 1, two optical fiber sensing elements 4 of per share 1 homonymy of rail are in 90 ° of angles.The optical fiber sensing element 4
It is in 40 ~ 50 ° of angles with 1 natural axis of rail, the data processing after detecting for convenience neutralizes optical fiber sensing element 4 and rail 1
Axis is arranged to 45 °.The optical fiber sensing element 4 of both sides is symmetrical arranged along rail 1（Relative position and inclination angle with sampled point 2
Degree is consistent）.It is as far as possible longer on the premise of sampled point 2 cannot be overlapped with the fulcrum of sleeper 3, due to 3 spacing of sleeper in China
For 600mm, the occupancy length of removing sleeper 3, therefore sampled point 2 are more than 250mm, each sleeper section, optical fiber setting as far as possible
Distance between point is as far as possible unified consistent, and optical fiber set-point is as far as possible equal with a distance from sleeper spacing center, in favor of data processing
Computing.
With reference to shown in Fig. 5, the position according to above-mentioned optical fiber sensing element 4 is used as optical fiber after installation is complete by the use of rail 1
Force acting on transducer carrier, in 1 stress deformation of rail, the output of optical fiber sensing element 4 is the characteristic of shearing waveform, makees optical fiber
For a kind of new material, the new detection device being directly becoming in railway Super leaning load system.And optical fiber sensing element 4 is arranged on steel
On the natural axis of rail 1 so that optical fiber sensing element 4 collect for shear signal, when having train to pass through on rail 1, it is cut
Shown in stress waveform in the shape Fig. 5 of Reeb.
The output signal formula of optical fiber sensing element 4 is：F=Wg S q/L, wherein Wg are load, and L is to be used as rail 1
Point two sleepers between distance, S for 1 stress point of rail to the distance of wherein one end fulcrum, q is stress point area, is reduced to herein
1。
It can be seen that by Fig. 5 and formula：
1）The output of optical fiber is different with stress point position to both ends fulcrum using optical fiber midpoint and 1 natural axis intersection point of rail as boundary,
Change respectively in positive and negative opposite direction（For the central point of fine sensing element with sampled point 2 not in same position, oscillogram can phase
The upper and lower translation answered, is unfavorable for the calculating in later stage, therefore aligns as far as possible when mounted, and according to the setting of collection point, ripple
Shape figure also can left and right offset）.
2）The size of optical fiber output value obeys formula：The linear states of F=Wg S q/L, its maximum is in stress point and light
When fine midpoint and natural axis intersection overlap.（Positive and negative two direction is such）
3）When sleeper spacing is fixed, after fiber position is fixed, the maximum of optical fiber output is only linearly related with load direct proportion.
According to Fig. 5, we can obtain peak value, but be adopted in train high-speed cruising and current fiber data
Collection instrument sampling rate is only reached under the present situation of 1000/S times, it is difficult to capture the peak-peak of fiber-optic signal output（Other values are equal
There is the ratios affect of S/L）, that is, valid data collection section is too small, and the effective of measuring accuracy is enough to ensure that it is difficult to collect
Data, the error thereby resulted in are even up to 6%.
Therefore, two sampled points 2 are set, as shown in fig. 6, the purpose that two fiber placing points are set in sleeper section is
Cause one short although artificial, can improve and catch valid data probability, valid data collection section（With reference to the synthesis of Fig. 6
Oscillogram afterwards）Can be there are error although gathering section in practice, can be by error without limiting by weighted mean method
Small error.Multiple sleeper sections continuously or discontinuously set multiple valid data collection sections, the raising measuring accuracy that can stablize.
According to calculating and experiment：Below 70 kilometers/hour during speed, collection section should be greater than 8.
In view of train swings snakelike forward in circuit operating status, the stress point that wheel is contacted with rail 1 is simultaneously
Not always on the center line of in-orbit top surface, the set-point only in 12 side natural axis of the web of the rail, it is obtained to fix fibre optical sensor
Signal output will be disturbed due to the swing of wheel.Same load cannot get same output, so taking 1 web of the rail of rail
The fibre optical sensor of the same angle of the web of the rail each fixation of 12 both sides correspondence position of 12 each set-point of natural axis, when wheel passes through
When crossing 1 set-point of rail, no matter how wheel swings, the corresponding two fibre optical sensor signal outputs in 12 set-point both sides of the web of the rail
Always consistent with the load linear direct proportion of synthesis be associated.
The structure of optical fiber sensing element is substantially as shown in fig. 7, the optical fiber sensing element 4 of definite sampled point 2, can use at present
Method have：1, it is gluing, 2, add additional carrier point be welded full weld, 3, laser spot welding, 4, imitation laser cold welding spot welding.Present specification
Preferably imitation laser cold welding spot welding, and thereby determine that the shape of fibre optical sensor, only need cold solder connection to be welded in corresponding to optical fiber cable 41
Outer 42 position of solder joint, because gluing quality cannot ensure long-time stable at present, spot welding full weld is constructed in Railway Site
It is not allowed to, laser spot welding equipment volume is huge, expensive, and cold welding spot welding will not destroy the overall metallographic structure of rail 1, no
Rail 1 can be caused to anneal, do not influence 1 intensity of rail, overcome former pin type shear force sensor 21 the web of the rail 12 drill it is dangerous because
Element.
With reference to shown in Fig. 8, which further includes the harvester of connection optical fiber sensing element 4, and connection harvester is to every
The processing unit and the display device of connection processing device and storage respectively that one optical fiber sensing element 4 output signal is handled
Device.
With reference to shown in Fig. 9, specifically on connecting the mode of optical fiber sensing element 4 as series connection.
Embodiment 2,
A kind of railway Super leaning load detection method, comprises the following steps：
Two sampled points 2 are all set respectively on the both sides per one 1 web of the rail 12 of rail between each two sleeper 3, adopting per side
Sampling point 2 is symmetrical arranged relative to rail 1, one optical fiber sensing element 4 of fixed setting is tilted on each sampled point 2, and described adopt
Sampling point 2 is arranged on the natural axis of rail 1, and two optical fiber sensing elements 4 layout of per share 1 homonymy of rail is in 90 ° of angles；
2 stressing conditions of sampled point of the same side two are gathered by optical fiber sensing element 4 and draw shearing waveform, merge two shear waves
Shape, obtains Super leaning load detection data；
Show and store super inclined side detection data.
This specific embodiment is only explanation of the invention, it is not limitation of the present invention, people in the art
Member as needed can make the present embodiment the modification of no creative contribution after this specification is read, but as long as at this
All protected in the right of invention be subject to Patent Law.
Claims (9)
1. a kind of railway ultra-deviation load detection system, including rail, it is characterised in that：One every steel between each two sleeper (3)
Two sampled points (2) are all respectively arranged with the both sides of rail (1) web of the rail (12), the sampled point (2) per side is relative to rail（1）It is right
Claim to set, tilted on each sampled point (2) and be fixedly installed an optical fiber sensing element (4), and the sampled point (2) is arranged on
On the natural axis of rail (1), per share rail（1）Two optical fiber sensing elements of homonymy（4）Layout is in 90 ° of angles.
A kind of 2. railway ultra-deviation load detection system according to claim 1, it is characterised in that：The optical fiber sensing element
（4）It is in 40 ~ 50 ° of angles with rail natural axis.
A kind of 3. railway ultra-deviation load detection system according to claim 2, it is characterised in that：The optical fiber sensing element
（4）It is in 45 ° of angles with rail natural axis.
A kind of 4. railway ultra-deviation load detection system according to claim 1, it is characterised in that：The optical fiber sensing element
（4）Center and sampled point（2）Unanimously.
A kind of 5. railway ultra-deviation load detection system according to claim 4, it is characterised in that：The optical fiber sensing element of both sides
(4) it is symmetrical arranged along rail.
A kind of 6. railway ultra-deviation load detection system according to claim 1, it is characterised in that：With one rail（1）Homonymy
Two sampled points（2）Spacing be not less than 250mm.
A kind of 7. railway ultra-deviation load detection system according to claim 1, it is characterised in that：The optical fiber sensing element
(4) it is scheduled on by cold solder connection solid welding on rail (1).
A kind of 8. railway ultra-deviation load detection system according to claim 1-7 any one, it is characterised in that：The company of further including
The harvester of optical fiber sensing element (4) is connect, connection harvester handles each optical fiber sensing element (4) output signal
Processing unit and respectively connection processing device display device and storage device.
9. a kind of railway Super leaning load detection method, comprises the following steps：
Two sampled points (2) are all set respectively on the both sides per one rail (1) web of the rail (12) between each two sleeper (3),
Sampled point (2) per side is relative to rail（1）It is symmetrical arranged, one optical fiber sensitivity of fixed setting is tilted on each sampled point (2)
Element (4), and the sampled point (2) is arranged on the natural axis of rail (1), per share rail（1）Two optical fiber sensitivities of homonymy
Element（4）Layout is in 90 ° of angles；
The sampled point of the same side two is gathered by optical fiber sensing element (4)（2）Stressing conditions draw shearing waveform, merge two and cut
Reeb shape, obtains Super leaning load detection data；
Show and store super inclined side detection data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810022513.0A CN107957285A (en) | 2018-01-10 | 2018-01-10 | A kind of railway Super leaning load system and detection method |
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| CN201810022513.0A CN107957285A (en) | 2018-01-10 | 2018-01-10 | A kind of railway Super leaning load system and detection method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115320A (en) * | 2018-10-11 | 2019-01-01 | 苏州晟科测控技术有限公司 | A kind of attachment web of the rail formula Weighing module |
| CN110514277A (en) * | 2019-06-28 | 2019-11-29 | 北京东方瑞威科技发展股份有限公司 | A kind of fibre optical sensor for railway big load dynamic weighting |
| CN112097884A (en) * | 2020-06-09 | 2020-12-18 | 承德石油高等专科学校 | Dynamic rail weighing fiber grating pressure sensor with flexible amplifying structure |
| CN113091867A (en) * | 2021-04-06 | 2021-07-09 | 郑州铁路职业技术学院 | Railway vehicle overload and unbalanced load detection system |
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| CN101672687A (en) * | 2009-09-29 | 2010-03-17 | 黑龙江大学 | Device for testing railway wagon overloading and unbalance loading by foundationless-tunnel fiber and method |
| CN105444853A (en) * | 2015-11-14 | 2016-03-30 | 北京东方瑞威科技发展股份有限公司 | Optical fiber detection device adopting steel rail as elastomer, and railway overload and unbalanced load detection system |
| CN106494454A (en) * | 2016-10-25 | 2017-03-15 | 中国神华能源股份有限公司 | Railway axis-counting device, method, system and signal handling equipment |
| CN206583519U (en) * | 2017-03-15 | 2017-10-24 | 北京东方瑞威科技发展股份有限公司 | SMD shear force sensor and track scale/Super leaning load system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101672687A (en) * | 2009-09-29 | 2010-03-17 | 黑龙江大学 | Device for testing railway wagon overloading and unbalance loading by foundationless-tunnel fiber and method |
| CN105444853A (en) * | 2015-11-14 | 2016-03-30 | 北京东方瑞威科技发展股份有限公司 | Optical fiber detection device adopting steel rail as elastomer, and railway overload and unbalanced load detection system |
| CN106494454A (en) * | 2016-10-25 | 2017-03-15 | 中国神华能源股份有限公司 | Railway axis-counting device, method, system and signal handling equipment |
| CN206583519U (en) * | 2017-03-15 | 2017-10-24 | 北京东方瑞威科技发展股份有限公司 | SMD shear force sensor and track scale/Super leaning load system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109115320A (en) * | 2018-10-11 | 2019-01-01 | 苏州晟科测控技术有限公司 | A kind of attachment web of the rail formula Weighing module |
| CN109115320B (en) * | 2018-10-11 | 2023-09-19 | 苏州晟科测控技术有限公司 | Attached rail waist type weighing module |
| CN110514277A (en) * | 2019-06-28 | 2019-11-29 | 北京东方瑞威科技发展股份有限公司 | A kind of fibre optical sensor for railway big load dynamic weighting |
| CN112097884A (en) * | 2020-06-09 | 2020-12-18 | 承德石油高等专科学校 | Dynamic rail weighing fiber grating pressure sensor with flexible amplifying structure |
| CN113091867A (en) * | 2021-04-06 | 2021-07-09 | 郑州铁路职业技术学院 | Railway vehicle overload and unbalanced load detection system |
| CN113091867B (en) * | 2021-04-06 | 2023-02-03 | 郑州铁路职业技术学院 | Railway vehicle overload and unbalanced load detection system |
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