CN109017871A - A kind of device and method of on-line dynamic measurement train wheel geometric parameter - Google Patents
A kind of device and method of on-line dynamic measurement train wheel geometric parameter Download PDFInfo
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- CN109017871A CN109017871A CN201810678254.7A CN201810678254A CN109017871A CN 109017871 A CN109017871 A CN 109017871A CN 201810678254 A CN201810678254 A CN 201810678254A CN 109017871 A CN109017871 A CN 109017871A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
- B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
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Abstract
The invention discloses a kind of device and methods of on-line dynamic measurement train wheel geometric parameter, belong to train wheel detection technique field.A kind of device of on-line dynamic measurement train wheel geometric parameter of the invention, including being set in turn in laser displacement sensor I and laser displacement sensor II on the inside of track along This train is bound for XXX, wherein it is upward to be each perpendicular to rim face and rail top face in wheel for the detection light beam of laser displacement sensor I and laser displacement sensor II.The present invention passes through the laying of two laser displacement sensors, and acquire data to it and carry out handling the geometric parameter that can be obtained train wheel, the on-line dynamic measurement of train wheel geometric parameter is realized, measurement efficiency is improved, and its measurement accuracy is also higher, measurement range is big.
Description
Technical field
The invention belongs to train wheel detection technique fields, more specifically to a kind of on-line dynamic measurement train vehicle
Take turns the device and method of geometric parameter.
Background technique
Train wheel is one of most important running part of rail transit train, it carries all dynamic and static loads of train
Lotus.But during train operation, due to rubbing for a long time between wheel and track, different degrees of abrasion can be caused to wheel,
Such as diameter abrasion, flange wear.Diameter abrasion will lead to same vehicle or unit-frame or with transfinite to wheel footpath difference and wheel rim height increase
Greatly, flange wear will lead to flange thickness reduce and wheel rim integrated value reduce, these the occurrence of traffic safety can all be made
At very big threat.Therefore, the diameter (D of train wheel in time, is quickly and accurately measuredT), wheel rim high (Sh), wheel rim it is thick
(Sd), the geometric parameters such as wheel rim integrated value (Qr), for ensureing that the traffic safety of train is of great significance.
The detection means of existing wheel geometric parameter mainly includes manual measurement and static measurement.Wherein, manual measurement master
If carrying out rough measure to wheel geometric parameter using the 4th kind of detector and wheel footpath ruler, measurement advantage is that equipment investment is low,
The disadvantage is that precision is low, human input is big, measurement period is long.Static measurement is to carry out wheel geometric parameters using special equipments such as lathes
A kind of means of number measurement, measurement advantage are precision height, the disadvantage is that equipment investment is big, at high cost, need to expend a large amount of people
Power and material resources, and measurement period is longer, to influence the normal use of train.
Various limitations as existing for manual measurement and static measurement, present more and more people concentrate on online dynamic
The research of measurement method.Such as, application number 200610155282.8 discloses a kind of vehicle wheel to diameter online test method and dress
It sets, the letter for the base position that this method is detected using projection information of the structured light light source on wheel tread and displacement sensor
Breath detects wheel average diameter parameter and left and right wheels wheel footpath difference parameter, but this method exists and to be influenced, be responded by ambient light
The disadvantages such as speed is slow, measurement accuracy is low.Application number 201410519742.5 discloses a kind of municipal rail train wheelset profile and examines online
Method and device is surveyed, this application measures the wheel rim of different moments tyre tread contour line most based on two-dimensional laser displacement transducer technology
The point of different moments is reverted to the coordinate value under synchronization in situation known to speed by low spot coordinate, using 3 points at
Round principle fits the circle where wheel rim vertex, then obtains wheel with the wheel rim height that wheel rim vertex circular diameter subtracts twice
Diameter.This method due to speed as it is known that in the seat reverted to the value of different moments wheel rim minimum point under synchronization
During scale value, due to the deviation of speed, the coordinate value after causing reduction is distorted, the wheel rim apex circle after eventually leading to fitting
Diameter has biggish deviation.
Summary of the invention
1. technical problems to be solved by the inivention
It is an object of the invention to overcome problem above existing for existing train wheel geometric parameter measurement, one kind is provided
The device and method of on-line dynamic measurement train wheel geometric parameter.It can be several to train wheel using technical solution of the present invention
What parameter carries out on-line dynamic measurement, and its measurement accuracy is higher, to advantageously ensure that the safety traffic of train.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows:
A kind of device of on-line dynamic measurement train wheel geometric parameter of the invention, including along This train is bound for XXX successively
The laser displacement sensor I and laser displacement sensor II being set on the inside of track, wherein laser displacement sensor I and laser position
It is upward that the detection light beam of displacement sensor II is each perpendicular to rim face and rail top face in wheel.
Further, the starting point on the inside of the track between data collection zone, which is equipped with, starts switch, and is located at data
The clearing end for acquiring section is equipped with shutdown switch.
Further, the laser displacement sensor I is identical with the sample frequency of laser displacement sensor II.
Further, the eddy current displacement sensor I being spaced apart and current vortex position are also equipped on the inside of the track
Displacement sensor II.
Further, the sample frequency of described two eddy current displacement sensors is identical, and eddy current displacement sensor
Sample frequency K1More than or equal to the sample frequency K of laser displacement sensor2。
Further, the eddy current displacement sensor and laser displacement sensor are connected to data processing system.
Further, described start switch, eddy current displacement sensor, laser displacement sensor and shutdown switch with
Control system is connected.
A kind of method of on-line dynamic measurement train wheel geometric parameter of the invention starts switch when being triggered, two
Laser displacement sensor starts simultaneously at acquisition data, when shutdown switch is triggered, data acquisition terminate, to collected data into
Row is handled to get train wheel geometric parameter, the specific process is as follows:
Step 1, the distance value di for intercepting wheel rim vertex in laser displacement sensor I institute measuring wheel profile in order, that is, survey each
Lowest distance value in contour line, and withSet of coordinates is established using di as Y coordinate for X-coordinate
Step 2 carries out round fitting to obtained set of coordinates, obtains wheel rim vertex circular diameter D；
Step 3 finds out the smallest contour line A of wheel rim vertex distance in laser displacement sensor I institute measuring wheel profile, and
The distance value Z on wheel rim vertex on the contour line；
Step 4, calculating laser displacement sensor I survey diameter value D corresponding to each point distance value on the A articles contour linej,
Calculation formula are as follows:
Dj=D-2 (Zj- Z) (j=1,2,3 ... ...)
In formula: D is wheel rim vertex circular diameter, mm；Z surveys wheel rim in the A articles contour line by laser displacement sensor I
The distance value on vertex, unit mm；ZjThe distance value of other each points in the A articles contour line, unit are surveyed by laser displacement sensor I
mm；
Step 5, calculating laser displacement sensor II survey diameter value corresponding to each point distance value on the A articles contour line,
Calculation formula are as follows:
In formula: R is wheel rim vertex radius of circle, unit mm；Z surveys wheel rim in the A articles contour line by laser displacement sensor I
The distance value on vertex, unit mm；akThe distance value of other each points in the A articles contour line is surveyed by laser displacement sensor II, it is single
Position mm；The sensing head of sensing head and laser displacement sensor II that h is laser displacement sensor I is along perpendicular to rail top face direction
Difference in height, unit mm, and the sensing head height of laser displacement sensor I h when the sensing head of laser displacement sensor II is positive,
Otherwise it is negative；L2The distance in rail top face direction, unit mm are parallel to for the sensing head edge of two laser displacement sensors；
Step 6, interception laser displacement sensor I survey in the A articles contour line in wheel rim face between wheel rim vertex
Diameter, and in conjunction with itself X axis coordinate of laser displacement sensor I, constitute set of coordinates { (Xd, Dd)}；Intercept laser displacement sensor
II surveys the diameter in the A articles contour line outside wheel rim vertex to wheel between rim face, and the X with the laser displacement sensor itself
Axial coordinate combines, and constitutes set of coordinates { (Xe, De)}；By the set of coordinates of interception, point splices characterized by wheel rim vertex again, splices
When remove a duplicate wheel rim apex coordinate, and X-coordinate is integrated, is abscissa zero point to wheel using rim face in wheel
Outer rim face is X-axis, obtains diameter the set of coordinates { (X of rim face to the outer rim face different location out of wheelf, Df)}；
Step 7, in set of coordinates { (Xf, Df) in find Xf=d or from diameter corresponding to the immediate abscissa of d to get
Wheel tread diameter DT, wherein d is that wheel diameter measures the distance between rim face in basic point and wheel, and wheel rim is a height of
Step 8, in set of coordinates { (Xf, Df) in find and wheel rim thickness measurement basic point corresponding to abscissa on the outside of wheel rim
Xh, abscissa corresponding to rim face is denoted as X in wheel1, then wheel rim thickness is Sd=Xh-X1；In set of coordinates { (Xf, Df) in find with
Wheel rim integrated value measures the abscissa X on the outside of wheel rim corresponding to basic pointq, then wheel rim integrated value is Qr=Xh-Xq。
Further, train running speed V is obtained according to following methods measurement in the step 1:
A, calculate eddy current displacement sensor I institute measured data in minimum value into eddy current displacement sensor II institute measured data
Data volume n between minimum value；
B, wheels travel speed, calculation formula are calculated are as follows:
Wherein, V is travel speed when wheel passes through surveying range, unit mm/ms；L1For eddy current displacement sensor I
The center in rail top face direction is parallel to away from K to the edge eddy current displacement sensor II1For adopting for two eddy current displacement sensors
Sample frequency, kHz.
3. beneficial effect
Using technical solution provided by the invention, compared with prior art, there is following remarkable result:
(1) device of a kind of on-line dynamic measurement train wheel geometric parameter of the invention, including along This train is bound for XXX
The laser displacement sensor I and laser displacement sensor II being set in turn on the inside of track, wherein laser displacement sensor I and swash
It is upward that the detection light beam of Optical displacement sensor II is each perpendicular to rim face and rail top face in wheel, passes through two laser displacements sensings
The laying of device, and acquire data to it and carry out handling the geometric parameter that can be obtained train wheel, realize train wheel geometry
The on-line dynamic measurement of parameter improves measurement efficiency, and its measurement accuracy is also higher, and measurement range is big.
(2) device of a kind of on-line dynamic measurement train wheel geometric parameter of the invention, is sensed using current vortex displacement
The high feature of device sample frequency, side is also equipped with eddy current displacement sensor I and eddy current displacement sensor II in orbit, leads to
The laying for crossing eddy current displacement sensor measures train running speed, so as to effectively improve wheels travel speed
Accuracy, and then can effectively ensure that the measurement accuracy of train wheel geometric parameter.
(3) method of a kind of on-line dynamic measurement train wheel geometric parameter of the invention starts switch when being triggered, two
A laser displacement sensor starts simultaneously at acquisition data, and when shutdown switch is triggered, data acquisition terminates, to collected data
It is handled, so as to realize the on-line dynamic measurement of train wheel geometric parameter, and its measurement accuracy is higher.
(4) method of a kind of on-line dynamic measurement train wheel geometric parameter of the invention, using non-cpntact measurement, measurement
Process is to wheel without abrasion, and its measuring device structure and installation are simple, at low cost, is suitable for popularization and application.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the device of on-line dynamic measurement train wheel geometric parameter of the invention；
Fig. 2 is the structural schematic diagram of wheel to be measured.
Label declaration in schematic diagram:
1, it starts switch；2, eddy current displacement sensor I；3, laser displacement sensor I；4, eddy current displacement sensor
II；5, laser displacement sensor II；6, shutdown switch.
Specific embodiment
To further appreciate that the contents of the present invention, now in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
As shown in Figure 1, a kind of device of on-line dynamic measurement train wheel geometric parameter of the present embodiment, including along train
Driving direction is set in turn in starting switch 1, laser displacement sensor I3, laser displacement sensor II5 and stop on the inside of track
Only switch 6, wherein the detection light beam of laser displacement sensor I3 and laser displacement sensor II5 be each perpendicular in wheel rim face and
Rail top face is upward, and its sample frequency is identical.1, laser displacement sensor is started switch in the present embodiment and shutdown switch 6 is equal
It is connected with control system, and laser displacement sensor is additionally coupled to data processing system.
Existing train wheel geometric parameter measurement there are aiming at the problem that, the present embodiment only passes through two laser displacements sensing
The laying of device, and acquire data to it and carry out handling the geometric parameter that can be obtained train wheel, realize train wheel geometry
The on-line dynamic measurement of parameter improves measurement efficiency, and its measurement accuracy is also higher, and measurement range is big.
Specifically, in conjunction with Fig. 1, Fig. 2, a kind of method of on-line dynamic measurement train wheel geometric parameter of the present embodiment,
When starting switch 1 and being triggered, two laser displacement sensors start simultaneously at acquisition data, and when shutdown switch 6 is triggered, data are adopted
Collection terminates, and is handled collected data to get train wheel geometric parameter, the specific process is as follows:
Step 1, the distance value di for intercepting wheel rim vertex in laser displacement sensor I3 institute measuring wheel profile in order, that is, surveyed
Lowest distance value in each contour line, and withSet of coordinates is established using di as Y coordinate for X-coordinate
Step 2 carries out round fitting to obtained set of coordinates, obtains wheel rim vertex circular diameter D；
Step 3 finds out the smallest contour line A of wheel rim vertex distance in laser displacement sensor I3 institute measuring wheel profile, with
And on the contour line wheel rim vertex distance value Z；
Step 4, calculating laser displacement sensor I3 survey diameter value corresponding to each point distance value on the A articles contour line
Dj, calculation formula are as follows:
Dj=D-2 (Zj- Z) (j=1,2,3 ... ...)
In formula: D is wheel rim vertex circular diameter, mm；Z is surveyed in the A articles contour line by laser displacement sensor I3 and is taken turns
The distance value on edge vertex, unit mm；ZjThe distance value of other each points in the A articles contour line is surveyed by laser displacement sensor I3,
Unit mm；
Step 5, calculating laser displacement sensor II5 survey diameter value corresponding to each point distance value on the A articles contour line,
Calculation formula are as follows:
In formula: R is wheel rim vertex radius of circle, unit mm；Z is surveyed in the A articles contour line by laser displacement sensor I3 and is taken turns
The distance value on edge vertex, unit mm；akThe distance value of other each points in the A articles contour line is surveyed by laser displacement sensor II5,
Unit mm；The sensing head of sensing head and laser displacement sensor II5 that h is laser displacement sensor I3 is along perpendicular to rail top face
The sensing head height of the difference in height in direction, unit mm, and laser displacement sensor I3 are when the sensing head of laser displacement sensor II5
H is positive, otherwise is negative；L2The distance in rail top face direction, unit mm are parallel to for the sensing head edge of two laser displacement sensors；
Step 6, interception laser displacement sensor I3 survey in the A articles contour line in wheel rim face between wheel rim vertex
Diameter, and in conjunction with itself X axis coordinate of laser displacement sensor I3, constitute set of coordinates { Xd, Dd}；Intercept laser displacement sensor
II5 surveys the diameter in the A articles contour line outside wheel rim vertex to wheel between rim face, and with the laser displacement sensor itself
X axis coordinate combines, and constitutes set of coordinates { Xe, De}；By the set of coordinates of interception, point splices characterized by wheel rim vertex again, splices
When remove a duplicate wheel rim apex coordinate, and X-coordinate is integrated, is abscissa zero point to wheel using rim face in wheel
Outer rim face is X-axis, obtains the diameter set of coordinates { X of rim face to the outer rim face different location out of wheelf, Df}；
Step 7, in set of coordinates { Xf, DfIn find Xf=d or from diameter corresponding to the immediate abscissa of d to get vehicle
Wheel tread diameter DT, wherein d is that wheel diameter measures the distance between rim face in basic point and wheel, and wheel rim is a height of
Step 8, in set of coordinates { Xf, DfIn find and wheel rim thickness measurement basic point corresponding to abscissa X on the outside of wheel rimh,
Abscissa corresponding to rim face is denoted as X in wheel1, then wheel rim thickness is Sd=Xh-X1；In set of coordinates { Xf, DfIn find and wheel rim
Integrated value measures the abscissa X on the outside of wheel rim corresponding to basic pointq, then wheel rim integrated value is Qr=Xh-Xq。
Embodiment 2
A kind of device of the on-line dynamic measurement train wheel geometric parameter of the present embodiment, structure substantially with embodiment 1,
Its difference essentially consists in: being also equipped with the eddy current displacement sensor I2 and current vortex being spaced apart on the inside of the present embodiment middle orbit
Displacement sensor II4, and eddy current displacement sensor I2 is installed on laser displacement sensor I3 and starts switch between 1, electric whirlpool
Stream displacement sensor II4 is installed between two laser displacement sensors.The sample frequency of above-mentioned two eddy current displacement sensor
It is identical, and the sample frequency K of eddy current displacement sensor1More than or equal to the sample frequency K of laser displacement sensor2.This reality simultaneously
Eddy current displacement sensor I2 and eddy current displacement sensor II4 in example is applied also to be connected with control system and data processing system,
And the installation of eddy current displacement sensor guarantees that wheel rim when wheel passes through is able to enter the measured zone of eddy current displacement sensor.
A kind of method of on-line dynamic measurement train wheel geometric parameter of the present embodiment, step is the same as embodiment 1, area
It does not essentially consist in: utilizing the measurement data pair of eddy current displacement sensor I2 and eddy current displacement sensor II4 in the present embodiment
The travel speed V of surveying range train is calculated, and when starting switch 1 starting, two eddy current displacement sensors are also simultaneously
Data are acquired, when shutdown switch triggering, are simultaneously stopped acquisition.The circular of the travel speed V of train are as follows:
A, minimum value is calculated in eddy current displacement sensor I2 institute measured data to eddy current displacement sensor II4 institute measured data
Data volume n between middle minimum value；
B, wheels travel speed, calculation formula are calculated are as follows:
Wherein, V is travel speed when wheel passes through surveying range, unit mm/ms；L1For eddy current displacement sensor I2
The center in rail top face direction is parallel to away from K to the edge eddy current displacement sensor II41For two eddy current displacement sensors
Sample frequency, kHz.
The present embodiment feature high using eddy current displacement sensor sample frequency, passes through the cloth of eddy current displacement sensor
If being measured to train running speed, so as to effectively improve the accuracy of wheels travel speed, and then can effectively protect
Demonstrate,prove the measurement accuracy of train wheel geometric parameter.
Embodiment 3
Measuring device structure and measurement method in the present embodiment is with embodiment 1, and difference essentially consists in: in the present embodiment
The distance between rim face d takes 70mm in wheel diameter measurement basic point and wheel.
Embodiment 4
Measuring device structure and measurement method in the present embodiment is with embodiment 1, and difference essentially consists in: in the present embodiment
Wheel rim thickness measures the corresponding diameter D of basic pointh=DT+20。
Embodiment 5
Measuring device structure and measurement method in the present embodiment is with embodiment 1, and difference essentially consists in: in the present embodiment
Wheel rim thickness measures the corresponding diameter of basic point or Dh=DT+24。
Embodiment 6
Measuring device structure and measurement method in the present embodiment is with embodiment 1, and difference essentially consists in: in the present embodiment
Wheel rim integrated value measures the corresponding wheel rim outside diameter D of basic pointq=D-4.
Schematically the present invention and embodiments thereof are described above, description is not limiting, institute in attached drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited to this.So if the common skill of this field
Art personnel are enlightened by it, without departing from the spirit of the invention, are not inventively designed and the technical solution
Similar frame mode and embodiment, are within the scope of protection of the invention.
Claims (9)
1. a kind of device of on-line dynamic measurement train wheel geometric parameter, it is characterised in that: including along This train is bound for XXX according to
The secondary laser displacement sensor I (3) and laser displacement sensor II (5) being set on the inside of track, wherein laser displacement sensor I
(3) and the detection light beam of laser displacement sensor II (5) to be each perpendicular to rim face and rail top face in wheel upward.
2. a kind of device of on-line dynamic measurement train wheel geometric parameter according to claim 1, it is characterised in that: institute
The starting point on the inside of track between data collection zone is stated equipped with (1) is started switch, the clearing end between data collection zone is set
There are shutdown switch (6).
3. a kind of device of on-line dynamic measurement train wheel geometric parameter according to claim 1 or 2, feature exist
In: the laser displacement sensor I (3) is identical with the sample frequency of laser displacement sensor II (5).
4. a kind of device of on-line dynamic measurement train wheel geometric parameter according to claim 3, it is characterised in that: institute
It states and is also equipped with the eddy current displacement sensor I (2) and eddy current displacement sensor II (4) being spaced apart on the inside of track.
5. a kind of device of on-line dynamic measurement train wheel geometric parameter according to claim 4, it is characterised in that: institute
The sample frequency for stating two eddy current displacement sensors is identical, and the sample frequency K of eddy current displacement sensor1More than or equal to sharp
The sample frequency K of Optical displacement sensor2。
6. a kind of device of on-line dynamic measurement train wheel geometric parameter according to claim 4, it is characterised in that: institute
It states eddy current displacement sensor and laser displacement sensor is connected to data processing system.
7. a kind of device of on-line dynamic measurement train wheel geometric parameter according to claim 4, it is characterised in that: institute
It states and starts switch (1), eddy current displacement sensor, laser displacement sensor and shutdown switch (6) and be connected with control system.
8. a kind of method of on-line dynamic measurement train wheel geometric parameter, it is characterised in that: when starting switch (1) and being triggered,
Two laser displacement sensors start simultaneously at acquisition data, and when shutdown switch (6) is triggered, data acquisition terminates, to collecting
Data handled to get train wheel geometric parameter, the specific process is as follows:
Step 1, the distance value di for intercepting wheel rim vertex in laser displacement sensor I (3) institute measuring wheel profile in order, and withSet of coordinates is established using di as Y coordinate for X-coordinate
Step 2 carries out round fitting to obtained set of coordinates, obtains wheel rim vertex circular diameter D；
Step 3 finds out the smallest contour line A of wheel rim vertex distance in laser displacement sensor I (3) institute measuring wheel profile, and
The distance value Z on wheel rim vertex on the contour line；
Diameter value D corresponding to each point distance value on the A articles contour line is surveyed in step 4, calculating laser displacement sensor I (3)j, meter
Calculate formula are as follows:
Dj=D-2 (Zj- Z) (j=1,2,3 ... ...)
In formula: D is wheel rim vertex circular diameter, mm；Z surveys wheel rim in the A articles contour line by laser displacement sensor I (3)
The distance value on vertex, unit mm；ZjThe distance value of other each points in the A articles contour line is surveyed by laser displacement sensor I (3),
Unit mm；
Diameter value corresponding to each point distance value on the A articles contour line is surveyed in step 5, calculating laser displacement sensor II (5), is counted
Calculate formula are as follows:
In formula: R is wheel rim vertex radius of circle, unit mm；Z surveys wheel rim in the A articles contour line by laser displacement sensor I (3)
The distance value on vertex, unit mm；akThe distance value of other each points in the A articles contour line is surveyed by laser displacement sensor II (5),
Unit mm；H is the sensing head of laser displacement sensor I (3) and the sensing head of laser displacement sensor II (5) along perpendicular to track
The difference in height in top surface direction, unit mm, and the sensing head height of laser displacement sensor I (3) are in laser displacement sensor II's (5)
H is positive when sensing head, otherwise is negative；L2For two laser displacement sensors sensing head along be parallel to rail top face direction away from
From unit mm；
Step 6, interception laser displacement sensor I (3) survey in the A articles contour line in wheel rim face to straight between wheel rim vertex
Diameter, and in conjunction with laser displacement sensor I (3) itself X axis coordinate, constitute set of coordinates { (Xd, Dd)}；Intercept laser displacement sensing
Device II (5) surveys the diameter in the A articles contour line outside wheel rim vertex to wheel between rim face, and certainly with the laser displacement sensor
The X axis coordinate of body combines, and constitutes set of coordinates { (Xe, De)}；By the set of coordinates of interception, point is spelled characterized by wheel rim vertex again
It connects, a duplicate wheel rim apex coordinate is removed when splicing, and X-coordinate is integrated, using rim face in wheel as abscissa zero
Point rim face to outside wheel is X-axis, obtains diameter the set of coordinates { (X of rim face to the outer rim face different location out of wheelf, Df)}；
Step 7, in set of coordinates { (Xf, Df) in find Xf=d or from diameter corresponding to the immediate abscissa of d to get wheel
Tyre tread diameter DT, wherein d is that wheel diameter measures the distance between rim face in basic point and wheel, and wheel rim is a height of
Step 8, in set of coordinates { (Xf, Df) in find and wheel rim thickness measurement basic point corresponding to abscissa X on the outside of wheel rimh, vehicle
Abscissa corresponding to rim face is denoted as X in taking turns1, then wheel rim thickness is Sd=Xh-X1；In set of coordinates { (Xf, Df) in find and wheel rim
Integrated value measures the abscissa X on the outside of wheel rim corresponding to basic pointq, then wheel rim integrated value is Qr=Xh-Xq。
9. a kind of method of on-line dynamic measurement train wheel geometric parameter according to claim 8, it is characterised in that: institute
Train running speed V in step 1 is stated to be obtained according to following methods measurement:
A, minimum value is calculated in eddy current displacement sensor I (2) institute measured data to eddy current displacement sensor II (4) institute measured data
Data volume n between middle minimum value；
B, wheels travel speed, calculation formula are calculated are as follows:
Wherein, V is travel speed when wheel passes through surveying range, unit mm/ms；L1Extremely for eddy current displacement sensor I (2)
The edge eddy current displacement sensor II (4) is parallel to the center in rail top face direction away from K1For two eddy current displacement sensors
Sample frequency, kHz.
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| CN202337271U (en) * | 2011-12-15 | 2012-07-18 | 南京拓控信息科技有限公司 | Railway wheel position detection device |
| CN103322936A (en) * | 2013-06-24 | 2013-09-25 | 南京理工大学 | Wheel set size on-line monitoring method |
| CN103587549A (en) * | 2013-11-11 | 2014-02-19 | 南京理工大学 | Laser-sensor-based device and method for detecting out-of-roundness of wheels of urban rail vehicles |
| CN103587551A (en) * | 2013-11-11 | 2014-02-19 | 南京理工大学 | Device and method for detecting urban rail vehicle wheel diameters through straight line vertical installation of sensors |
| CN105841655A (en) * | 2016-05-27 | 2016-08-10 | 南京理工大学 | Method and system for detecting size of train wheelset online |
| CN107200042A (en) * | 2017-05-23 | 2017-09-26 | 东莞市诺丽电子科技有限公司 | A kind of train wheel diameter wears away high-precision online test method and its detection means with circularity |
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