CN117781878A - Empty rail contact net state detection method - Google Patents
Empty rail contact net state detection method Download PDFInfo
- Publication number
- CN117781878A CN117781878A CN202410218372.5A CN202410218372A CN117781878A CN 117781878 A CN117781878 A CN 117781878A CN 202410218372 A CN202410218372 A CN 202410218372A CN 117781878 A CN117781878 A CN 117781878A
- Authority
- CN
- China
- Prior art keywords
- power supply
- straight line
- supply rail
- point
- expansion joint
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 230000002159 abnormal effect Effects 0.000 claims abstract description 4
- 238000004364 calculation method Methods 0.000 claims description 21
- 102100030638 Surfeit locus protein 2 Human genes 0.000 claims description 12
- 101710093351 Surfeit locus protein 2 Proteins 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 102000046669 Surf-1 Human genes 0.000 description 7
- 101150081019 surf1 gene Proteins 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000007689 inspection Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Landscapes
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention discloses a method for detecting the state of an empty rail contact net, which comprises the following steps: setting a geometric parameter measurement assembly, enabling the geometric parameter measurement assembly to move along the length direction of the power supply rail and taking pictures of a plurality of frames of power supply rail; entering a first stage of judgment according to the shot photo: judging whether the frame type of the surface profile sampling point set of the power supply rail is abnormal, and if so, outputting an invalid value; if not, marking and positioning W on the side wall of the box body from top to bottom 1 、W 2 、W 3 And W is 4 The method comprises the steps of carrying out a first treatment on the surface of the Detection interval W 1 ‑W 3 Entering a second stage judgment: judging whether the straight line segment is two segments and vertical, if so, marking the surface S of the power supply rail 1 、S 2 、S 3 And S is 4 The method comprises the steps of carrying out a first treatment on the surface of the If not, an expansion joint exists, and the straight line segment is advancedOne-step processing, and fitting a first straight line and a second straight line; and obtaining the flatness and clearance value of the expansion joint according to the first straight line and the second straight line. According to the method, data support is provided for monitoring the state of the overhead rail contact system.
Description
Technical Field
The invention relates to the technical field of power supply rail detection, in particular to a method for detecting the state of an empty rail contact net.
Background
When the air rail train normally operates, a shoe rail power supply system is adopted, a power supply rail arranged along the inner wall of an air rail box girder provides power for the train, but the space size of the power supply rail can change under the long-term influence of factors such as contact force of a collector shoe, environmental change and the like, and the power supply rail is extremely easy to burn and ablate at the position of an end elbow of the steel belt surface of the power supply rail and the position of the shoe rail which is not well matched, so that the normal current receiving of the shoe rail is seriously influenced, and potential threat exists for the safe operation of the air rail train. Because the empty rail box girder is erected in the air, the detection and inspection of a power supply system are difficult, and the power supply rail is problematic and is not easy to find in time.
Disclosure of Invention
The invention aims to provide a method for detecting the state of an empty rail contact network, which aims to facilitate parameter detection on a specific target of a power supply rail and is compatible with various detection environments in a box body.
The embodiment of the invention is realized by the following technical scheme:
the empty rail contact net state detection method is characterized by comprising the following steps of:
the geometrical parameter measuring assembly is arranged such that it moves along the length direction of the power supply rail and takes pictures of several frames of the power supply rail,
entering a first stage of judgment according to the shot photo:
judging whether the frame type of the surface profile sampling point set of the power supply rail is abnormal, and if so, outputting an invalid value; if not, marking and positioning W on the side wall of the box body from top to bottom 1 、W 2 、W 3 And W is 4 ；
Detection interval W 1 -W 3 Entering a second stage judgment:
judging whether the straight line segment is two segments and vertical, if so, marking the surface S of the power supply rail 1 、S 2 、S 3 And S is 4 The method comprises the steps of carrying out a first treatment on the surface of the If not, an expansion joint exists, further processing is carried out on the straight line segment, and the first straight line and the second straight line are fitted;
and obtaining the flatness and clearance value of the expansion joint according to the first straight line and the second straight line.
In a further technical scheme, the method for further processing the straight line segment comprises the following steps:
and (3) taking a first point and a second point of an expansion joint extension line, fitting a third straight line, judging whether the third straight line is perpendicular to the rail surface of the power supply rail, and if so, taking a surface midpoint and a surface endpoint, and fitting the first straight line and the second straight line.
In a further embodiment, the first point is located at one quarter of the expansion joint extension and the second point is located at three quarters of the expansion joint extension.
In a further technical scheme, the calculation method of the flatness of the expansion joint is as follows:
the horizontal distance from any point of the first straight line to the second straight line is calculated, and the calculation formula is as follows:
wherein S is the flatness of the expansion joint, x 1 、y 1 A is a coordinate point of any point of the first straight line 2 、B 2 、C 2 Is constant.
In a further technical scheme, the calculation method of the expansion joint clearance value is as follows:
and calculating the projection length of the connecting line of the first point and the surface endpoint on the X axis according to the included angle between the first point of the expansion joint and the surface endpoint of the second straight line, and obtaining the clearance value of the expansion joint according to the trigonometric function relation.
In a further technical scheme, the calculation formula of the clearance value of the expansion joint is as follows:
wherein gamma is the angle between the first point of the expansion joint and the surface end point of the second straight line, P 1of4 P being the first point of expansion joint surf2 Is the surface end point of the second straight line, P 3of4 And for the second point of the expansion joint, gw is the projection length of the connecting line of the first point and the surface endpoint on the X axis, G is the clearance value of the expansion joint, and θ is the included angle between the second straight line and the connecting line of the first point and the surface endpoint.
In a further technical scheme, the method further comprises the steps of:
and calculating the horizontal distance between the power supply rail and the inner side wall of the box body, the vertical distance between the power supply rail and the geometric parameter measuring assembly of the power supply rail and the inclination angle of the power supply rail, and performing error compensation.
In a further technical scheme, the calculation formula of the horizontal distance between the power supply rail and the inner side wall of the box body is as follows:
wherein A is the horizontal distance from the power supply rail to the inner side wall of the box body, and x 0 、y 0 For the surface midpoint of the power supply railCoordinate point, A 0 、B 0 、C 0 Is constant.
In a further technical scheme, a calculation formula of the vertical distance of the power supply track distance geometric parameter measuring component is as follows:
wherein B is the vertical distance of the power supply rail distance geometric parameter measuring component, P camera Measuring component position for geometric parameters, P side For the side center point of the power supply rail, P 1 For the intersection point of the connecting line of the position of the geometric parameter measuring component and the side surface center point of the power supply rail and the inner side wall of the box body, P 2 The projection of the position of the component on the inner side wall of the box body is measured for the geometric parameters.
In a further technical scheme, the calculation formula of the inclination angle of the power supply rail is as follows:
wherein k is 0 Is the slope of the inner side wall of the box body, k 1 Is the slope of the power supply rail surface extension line.
The technical scheme of the embodiment of the invention has at least the following advantages and beneficial effects:
in the running process of the air rail train, the power supply is obtained by sliding contact between the collector shoes arranged on the train body and the power supply rail arranged on the side surface of the air rail box body, so that the air rail train is the only power source for running the train. In the high-speed running process of the train, the collector shoe is in sliding contact with the power supply rail, the collector shoe slides across the expansion joint at high speed, and the expansion joint can deform to a certain extent after long-time working.
Therefore, in this embodiment, a threshold is set according to design parameters and design theoretical error values of the power supply rail and the expansion joint, then in the inspection process, the laser light-cut 3D measurement assembly is mounted on the carrier trolley, and along with the movement of the carrier trolley in the box body, data of smoothness S and gap value G of the expansion joint can be collected, an analysis report (waveform chart) is formed according to the collected data, and then the analysis report and the threshold obtained at the present time are compared, so that whether deformation generated by the expansion joint can endanger normal running of an empty rail train can be rapidly judged.
Under the general condition, an expansion joint is arranged every 400m or so of the power supply rail, and the workload of manually online measuring the expansion joint is large and the efficiency is low; the power supply rail is electrified, so that the power supply rail is required to be powered off and electrified for manual online measurement, the measurement work is complicated, and the safety risk is high; according to the method for acquiring the smoothness S and the gap value G data of the expansion joint through the carrier trolley carrying the laser light cutting 3D measuring assembly, whether the expansion joint needs to be maintained or not can be judged rapidly only by comparing the smoothness S and the gap value G data with the threshold value, and the efficiency is higher.
According to the invention, the parameters of the power supply rail, the power supply rail expansion joint and the power supply rail accessory are measured and detected, meanwhile, the high-definition imaging is triggered on a specific target, the parameter detection is carried out on the specific target in the power supply rail, the power supply rail expansion joint is compatible with various detection environments in a box body, the operation efficiency and the accuracy are both considered, and the data support is provided for monitoring the state of an empty rail contact net.
Drawings
FIG. 1 is a schematic diagram of a key point location;
FIG. 2 is a schematic diagram of an expansion joint right angle feature;
FIG. 3 is a schematic illustration of expansion joint flatness;
FIG. 4 is a schematic illustration of expansion joint gap values;
FIG. 5 is a schematic view of the horizontal distance of the power rail from the interior sidewall of the housing;
FIG. 6 is a schematic illustration of the vertical distance of a power rail distance geometry measuring assembly;
fig. 7 is a schematic view of the inclination angle of the power supply rail.
Reference numerals:
W 1 sidewall mark positioning one, W 2 Sidewall mark positioning two, W 3 Sidewall mark positioning three, W 4 Sidewall mark positioning four, S 1 -power rail surface points one, S 2 -supply rail surface points two, S 3 Supply rail surface points three, S 4 Supply rail surface points four, L vert Expansion joint extension, P 1of4 -first point, P 3of4 -a second point, L surf1 -a first straight line, P surf1 -surface midpoint, L surf2 -a second straight line, P surf2 -surface end point, P camera -geometry measuring component position, P side -power rail side center point, P 1 -intersection of the line of the geometrical parameter measuring assembly position and the central point of the side face of the power supply rail with the inner side wall of the tank, P 2 Projection of the position of the geometrical parameter measuring assembly on the inner side wall of the tank, L wall -an inner side wall of the tank.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Example 1:
referring to fig. 1-7, a method for detecting a state of an overhead contact system includes the following steps:
100. setting a geometric parameter measurement assembly, enabling the geometric parameter measurement assembly to move along the length direction of the power supply rail and taking pictures of a plurality of frames of power supply rail;
200. entering a first stage of judgment according to the shot photo:
judging whether the frame type of the surface profile sampling point set of the power supply rail is differentOften, if so, outputting an invalid value; if not, marking and positioning W on the side wall of the box body from top to bottom 1 、W 2 、W 3 And W is 4 ；
300. Detection interval W 1 -W 3 Entering a second stage judgment:
judging whether the straight line segment is two segments and vertical, if so, marking the surface S of the power supply rail 1 、S 2 、S 3 And S is 4 The method comprises the steps of carrying out a first treatment on the surface of the If not, an expansion joint exists, further processing is carried out on the straight line segment, and the first straight line and the second straight line are fitted;
400. and obtaining the flatness and clearance value of the expansion joint according to the first straight line and the second straight line.
In a further technical scheme, the method for further processing the straight line segment comprises the following steps:
and (3) taking a first point and a second point of an expansion joint extension line, fitting a third straight line, judging whether the third straight line is perpendicular to the rail surface of the power supply rail, and if so, taking a surface midpoint and a surface endpoint, and fitting the first straight line and the second straight line.
In a further embodiment, the first point is located at one quarter of the expansion joint extension and the second point is located at three quarters of the expansion joint extension.
In a further technical scheme, the calculation method of the flatness of the expansion joint is as follows:
the horizontal distance from any point of the first straight line to the second straight line is calculated, and the calculation formula is as follows:
wherein S is the flatness of the expansion joint, x 1 、y 1 A is a coordinate point of any point of the first straight line 2 、B 2 、C 2 Is constant.
In a further technical scheme, the calculation method of the expansion joint clearance value is as follows:
and calculating the projection length of the connecting line of the first point and the surface endpoint on the X axis according to the included angle between the first point of the expansion joint and the surface endpoint of the second straight line, and obtaining the clearance value of the expansion joint according to the trigonometric function relation.
In a further technical scheme, the calculation formula of the clearance value of the expansion joint is as follows:
wherein gamma is the angle between the first point of the expansion joint and the surface end point of the second straight line, P 1of4 P being the first point of expansion joint surf2 Is the surface end point of the second straight line, P 3of4 And for the second point of the expansion joint, gw is the projection length of the connecting line of the first point and the surface endpoint on the X axis, G is the clearance value of the expansion joint, and θ is the included angle between the second straight line and the connecting line of the first point and the surface endpoint.
In a further technical solution, the method further includes step 500:
and calculating the horizontal distance between the power supply rail and the inner side wall of the box body, the vertical distance between the power supply rail and the geometric parameter measuring assembly of the power supply rail and the inclination angle of the power supply rail, and performing error compensation.
In a further technical scheme, the calculation formula of the horizontal distance between the power supply rail and the inner side wall of the box body is as follows:
wherein A is the horizontal distance from the power supply rail to the inner side wall of the box body, and x 0 、y 0 A is the coordinate point of the surface midpoint of the power supply rail 0 、B 0 、C 0 Is constant.
In a further technical scheme, a calculation formula of the vertical distance of the power supply track distance geometric parameter measuring component is as follows:
wherein B is the vertical distance of the power supply rail distance geometric parameter measuring component, P camera Measuring component position for geometric parameters, P side For the side center point of the power supply rail, P 1 For the intersection point of the connecting line of the position of the geometric parameter measuring component and the side surface center point of the power supply rail and the inner side wall of the box body, P 2 The projection of the position of the component on the inner side wall of the box body is measured for the geometric parameters.
In a further technical scheme, the calculation formula of the inclination angle of the power supply rail is as follows:
wherein k is 0 Is the slope of the inner side wall of the box body, k 1 Is the slope of the power supply rail surface extension line.
Example 2:
this example is a description of example 1.
In step 100, the geometric parameter measuring assembly is disposed on a carrier trolley, and the carrier trolley moves along the length direction of the box body, so that the geometric parameter measuring assembly takes pictures of a plurality of frames of power supply rails.
The geometric parameter measurement assembly comprises a camera and a line laser, laser of the line laser is emitted to the power supply rail, and the camera shoots high-definition images.
In step 200, as shown in fig. 1, according to the structural characteristics of the power supply rail and the profile data distribution characteristics, judging whether the frame type of the surface profile sampling point set of the power supply rail is abnormal, and if so, outputting an invalid value; if not, marking and positioning W on the side wall of the box body from top to bottom 1 、W 2 、W 3 And W is 4 。
W 1 、W 2 For laser light cutting 3D measuring assembly (line laser, area array geometric parameter measurement)The component) emits laser to the upper part of the power supply rail in the vertical direction of the empty rail box body, and reflects the laser to the laser images on the vertical surface of the box body, which can be acquired in the geometric parameter measuring component, and the laser images are imaged as the upper end point and the lower end point of a straight line;
W 3 、W 4 the laser beam of the laser beam cutting 3D measuring component (line laser and area array geometric parameter measuring component) is emitted to the lower part of a power supply rail in the vertical direction of the empty rail box body, reflected to a laser image on the vertical surface of the box body, which can be acquired in the geometric parameter measuring component, and imaged as an upper endpoint and a lower endpoint of a straight line.
In step 300, as shown in FIG. 2, W is detected 1 -W 3 Judging whether the straight line segments are two and vertical, if so, marking the surface S of the power supply rail 1 、S 2 、S 3 And S is 4 The method comprises the steps of carrying out a first treatment on the surface of the If not, the expansion joint exists, the special frame is marked, and an expansion joint extension line L is taken vert Is at the first point P of (2) 1of4 And a second point P 3of4 Fitting a third straight line, judging whether the third straight line is perpendicular to the rail surface of the power supply rail, and taking the surface midpoint P if the third straight line is perpendicular surf1 And surface endpoint P surf2 Fitting a first straight line L surf1 And a second straight line L surf2 。
Wherein the first point P 1of4 Is positioned at the expansion joint extension line L vert Fourth of the second point P 3of4 Is positioned at the expansion joint extension line L vert Three quarters of (a); the data of one quarter and three quarters are close to the data center, so that the data are more reliable, and the interference of burrs is reduced.
In step 400, a first line L is calculated surf1 Any point P surf1 （x 1 ，y 1 ) To a second straight line L surf2 Obtaining a smoothness S value of the expansion joint, as shown in FIG. 3; wherein the second straight line L surf2 The linear equation of (A) is A 2 x+B 2 y+C 2 =0。
According to P surf1 And a second straight line L surf2 Is available simultaneously:
wherein S is the flatness of the expansion joint, x 1 、y 1 A is a coordinate point of any point of the first straight line 2 、B 2 、C 2 Is constant.
Because the expansion joint has few sampling values and most data have burrs in the gap, the longitudinal gap Gw (the first point P 1of4 And surface endpoint P surf2 Projection length of the connecting line of the expansion joint on the X axis), and then obtaining a gap value G of the expansion joint according to a triangular relation, as shown in fig. 4; the specific calculation formula is as follows:
wherein gamma is the angle between the first point of the expansion joint and the surface end point of the second straight line, P 1of4 P being the first point of expansion joint surf2 Is the surface end point of the second straight line, P 3of4 And for the second point of the expansion joint, gw is the projection length of the connecting line of the first point and the surface endpoint on the X axis, G is the clearance value of the expansion joint, and θ is the included angle between the second straight line and the connecting line of the first point and the surface endpoint.
In step 500, a horizontal distance a between the power supply rail and the inner sidewall of the case is calculated, as shown in fig. 5; wherein, the linear equation of the inner side wall of the box body is A 0 x+B 0 y+C 0 =0, surface midpoint P of power supply rail surf Is (x) 0 ，y 0 ) Simultaneous availability:
wherein A is the horizontal distance from the power supply rail to the inner side wall of the box body, and x 0 、y 0 A is the coordinate point of the surface midpoint of the power supply rail 0 、B 0 、C 0 Is constant.
The vertical distance B value of the power rail distance geometry measuring assembly is calculated as shown in fig. 7.
Wherein B is the vertical distance of the power supply rail distance geometric parameter measuring component, P camera Measuring component position for geometric parameters, P side For the side center point of the power supply rail, P 1 For the intersection point of the connecting line of the position of the geometric parameter measuring component and the side surface center point of the power supply rail and the inner side wall of the box body, P 2 The projection of the position of the component on the inner side wall of the box body is measured for the geometric parameters.
The vertical error compensation is two-stage, and the other end vertical error compensation is measured through the vehicle body posture unit of the carrier trolley.
Calculating the inclination angle alpha of the power supply rail and translating the inner side wall L of the box body wall To obtain the linear equation y=k 0 x+b 0 And then obtaining a linear equation y=k of the extension line of the surface of the power supply rail 1 x+b 1 As shown in fig. 6; and obtaining a calculation formula:
wherein k is 0 Is the slope of the inner side wall of the box body, k 1 Is the slope of the power supply rail surface extension line.
The method in this embodiment is applied as follows:
in the running process of the air rail train, the power supply is obtained by sliding contact between the collector shoes arranged on the train body and the power supply rail arranged on the side surface of the air rail box body, so that the air rail train is the only power source for running the train. In the high-speed running process of the train, the collector shoe is in sliding contact with the power supply rail, the collector shoe slides across the expansion joint at high speed, and the expansion joint can deform to a certain extent after long-time working.
Therefore, in this embodiment, a threshold is set according to design parameters and design theoretical error values of the power supply rail and the expansion joint, then in the inspection process, the laser light-cut 3D measurement assembly is mounted on the carrier trolley, and along with the movement of the carrier trolley in the box body, data of smoothness S and gap value G of the expansion joint can be collected, an analysis report (waveform chart) is formed according to the collected data, and then the analysis report and the threshold obtained at the present time are compared, so that whether deformation generated by the expansion joint can endanger normal running of an empty rail train can be rapidly judged.
Under the general condition, an expansion joint is arranged every 400m or so of the power supply rail, and the workload of manually online measuring the expansion joint is large and the efficiency is low; the power supply rail is electrified, so that the power supply rail is required to be powered off and electrified for manual online measurement, the measurement work is complicated, and the safety risk is high; according to the method for acquiring the smoothness S and the gap value G data of the expansion joint through the carrier trolley carrying the laser light cutting 3D measuring assembly, whether the expansion joint needs to be maintained or not can be judged rapidly only by comparing the smoothness S and the gap value G data with the threshold value, and the efficiency is higher.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The empty rail contact net state detection method is characterized by comprising the following steps of:
setting a geometric parameter measurement assembly, enabling the geometric parameter measurement assembly to move along the length direction of the power supply rail and taking pictures of a plurality of frames of power supply rail;
entering a first stage of judgment according to the shot photo:
judging whether the frame type of the surface profile sampling point set of the power supply rail is abnormal, and if so, outputting an invalid value; if not, the side of the box body is from top to bottomWall marking location W 1 、W 2 、W 3 And W is 4 ；
Detection interval W 1 -W 3 Entering a second stage judgment:
judging whether the straight line segment is two segments and vertical, if so, marking the surface S of the power supply rail 1 、S 2 、S 3 And S is 4 The method comprises the steps of carrying out a first treatment on the surface of the If not, an expansion joint exists, further processing is carried out on the straight line segment, and the first straight line and the second straight line are fitted;
and obtaining the flatness and clearance value of the expansion joint according to the first straight line and the second straight line.
2. The method for detecting the state of an empty rail catenary according to claim 1, wherein the method for further processing the straight line segment is as follows:
and (3) taking a first point and a second point of an expansion joint extension line, fitting a third straight line, judging whether the third straight line is perpendicular to the rail surface of the power supply rail, and if so, taking a surface midpoint and a surface endpoint, and fitting the first straight line and the second straight line.
3. The method for detecting the state of an empty rail catenary according to claim 2, wherein the first point is located at one quarter of an expansion joint extension line, and the second point is located at three quarters of the expansion joint extension line.
4. The method for detecting the state of an overhead rail catenary according to claim 1, wherein the method for calculating the flatness of the expansion joint is as follows:
the horizontal distance from any point of the first straight line to the second straight line is calculated, and the calculation formula is as follows:
wherein S is the flatness of the expansion joint, x 1 、y 1 A is a coordinate point of any point of a first straight line 2 、B 2 、C 2 Is constant.
5. The method for detecting the state of an overhead line system according to claim 1, wherein the method for calculating the clearance value of the expansion joint is as follows:
and calculating the projection length of the connecting line of the first point and the surface endpoint on the X axis according to the included angle between the first point of the expansion joint and the surface endpoint of the second straight line, and obtaining the clearance value of the expansion joint according to the trigonometric function relation.
6. The method for detecting the state of an overhead line system according to claim 5, wherein the calculation formula of the clearance value of the expansion joint is as follows:
wherein gamma is the angle between the first point of the expansion joint and the surface end point of the second straight line, P 1of4 P being the first point of expansion joint surf2 Is the surface end point of the second straight line, P 3of4 And for the second point of the expansion joint, gw is the projection length of the connecting line of the first point and the surface endpoint on the X axis, G is the clearance value of the expansion joint, and θ is the included angle between the second straight line and the connecting line of the first point and the surface endpoint.
7. The method for detecting the state of an overhead contact system according to claim 1, further comprising the steps of:
and calculating the horizontal distance between the power supply rail and the inner side wall of the box body, the vertical distance between the power supply rail and the geometric parameter measuring assembly of the power supply rail and the inclination angle of the power supply rail, and performing error compensation.
8. The method for detecting the state of an empty rail catenary according to claim 7, wherein a calculation formula of a horizontal distance between a power supply rail and an inner side wall of the box body is as follows:
wherein A is the horizontal distance from the power supply rail to the inner side wall of the box body, and x 0 、y 0 A is the coordinate point of the surface midpoint of the power supply rail 0 、B 0 、C 0 Is constant.
9. The method for detecting the state of an empty rail catenary according to claim 8, wherein a calculation formula of the vertical distance of the power supply rail distance geometric parameter measuring assembly is as follows:
wherein B is the vertical distance of the power supply rail distance geometric parameter measuring component, P camera Measuring component position for geometric parameters, P side For the side center point of the power supply rail, P 1 For the intersection point of the connecting line of the position of the geometric parameter measuring component and the side surface center point of the power supply rail and the inner side wall of the box body, P 2 The projection of the position of the component on the inner side wall of the box body is measured for the geometric parameters.
10. The method for detecting the state of an overhead line system according to claim 9, wherein the calculation formula of the inclination angle of the power supply rail is as follows:
wherein k is 0 Is the inner side wall of the box bodySlope, k of 1 Is the slope of the power supply rail surface extension line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410218372.5A CN117781878A (en) | 2024-02-28 | 2024-02-28 | Empty rail contact net state detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410218372.5A CN117781878A (en) | 2024-02-28 | 2024-02-28 | Empty rail contact net state detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117781878A true CN117781878A (en) | 2024-03-29 |
Family
ID=90383880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410218372.5A Pending CN117781878A (en) | 2024-02-28 | 2024-02-28 | Empty rail contact net state detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117781878A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2140480C1 (en) * | 1998-08-31 | 1999-10-27 | Муравин Геннадий Исаакович | Transport complex of megalopolis and method for control and relief of passenger, freight - passenger and freight traffics of megalopolis transport complex |
| CN107806824A (en) * | 2017-09-29 | 2018-03-16 | 常州安凯特电缆有限公司 | The detection method and device of contact net geometric parameter under a kind of lower-speed state |
| CN112389282A (en) * | 2020-11-17 | 2021-02-23 | 中铁十二局集团电气化工程有限公司 | Construction method for expansion joint of overhead rigid contact network at speed of 160km per hour |
| CN112964195A (en) * | 2021-02-04 | 2021-06-15 | 暨南大学 | Power supply rail geometric parameter comprehensive detection method and system based on laser triangulation |
| CN114954145A (en) * | 2022-05-10 | 2022-08-30 | 中铁四局集团电气化工程有限公司 | Mounting method of straddle type PC track beam C-shaped steel aluminum composite rail |
| CN115451826A (en) * | 2022-08-10 | 2022-12-09 | 西南交通大学 | Photogrammetry method and device for geometric parameters of contact network |
| CN115782702A (en) * | 2022-06-19 | 2023-03-14 | 中铁十二局集团有限公司 | Installation and adjustment method for expansion joint of rigid contact network |
| US20230347751A1 (en) * | 2020-09-17 | 2023-11-02 | Chenghui ZHANG | Adaptive mirror for sunlight and signals |
| CN117382426A (en) * | 2023-09-28 | 2024-01-12 | 中车工业研究院有限公司 | Vehicle-mounted pantograph self-adaptive control method and system |
| CN117589129A (en) * | 2024-01-18 | 2024-02-23 | 四川拓及轨道交通设备股份有限公司 | Gradient measurement method and system for vehicle-mounted flexible contact net positioner |
-
2024
- 2024-02-28 CN CN202410218372.5A patent/CN117781878A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2140480C1 (en) * | 1998-08-31 | 1999-10-27 | Муравин Геннадий Исаакович | Transport complex of megalopolis and method for control and relief of passenger, freight - passenger and freight traffics of megalopolis transport complex |
| CN107806824A (en) * | 2017-09-29 | 2018-03-16 | 常州安凯特电缆有限公司 | The detection method and device of contact net geometric parameter under a kind of lower-speed state |
| US20230347751A1 (en) * | 2020-09-17 | 2023-11-02 | Chenghui ZHANG | Adaptive mirror for sunlight and signals |
| CN112389282A (en) * | 2020-11-17 | 2021-02-23 | 中铁十二局集团电气化工程有限公司 | Construction method for expansion joint of overhead rigid contact network at speed of 160km per hour |
| CN112964195A (en) * | 2021-02-04 | 2021-06-15 | 暨南大学 | Power supply rail geometric parameter comprehensive detection method and system based on laser triangulation |
| CN114954145A (en) * | 2022-05-10 | 2022-08-30 | 中铁四局集团电气化工程有限公司 | Mounting method of straddle type PC track beam C-shaped steel aluminum composite rail |
| CN115782702A (en) * | 2022-06-19 | 2023-03-14 | 中铁十二局集团有限公司 | Installation and adjustment method for expansion joint of rigid contact network |
| CN115451826A (en) * | 2022-08-10 | 2022-12-09 | 西南交通大学 | Photogrammetry method and device for geometric parameters of contact network |
| CN117382426A (en) * | 2023-09-28 | 2024-01-12 | 中车工业研究院有限公司 | Vehicle-mounted pantograph self-adaptive control method and system |
| CN117589129A (en) * | 2024-01-18 | 2024-02-23 | 四川拓及轨道交通设备股份有限公司 | Gradient measurement method and system for vehicle-mounted flexible contact net positioner |
Non-Patent Citations (1)
| Title |
|---|
| 马雷;孙世斌;: "地下直径线隧道内刚性接触网施工技术探讨", 电气化铁道, no. 05, 15 October 2015 (2015-10-15), pages 11 - 13 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111366082A (en) | Movable contact rail detection device and application method thereof | |
| CN108106562B (en) | Contact net measuring method and device | |
| JP5698285B2 (en) | Overhead wire position measuring apparatus and method | |
| CN101576376B (en) | Method and system for laser detection of shape of charge level | |
| JP6159177B2 (en) | Overhead wire position measuring apparatus and method | |
| CN110482351B (en) | System and method for detecting straightness of guide rail of elevator in use | |
| CN110360947A (en) | A kind of vehicle's contour measurement method based on vector image measurement | |
| CN117589129B (en) | Gradient measurement method and system for vehicle-mounted flexible contact net positioner | |
| CN210570537U (en) | Bow net contact wire abrasion on-line detection device | |
| CN112278011A (en) | Robot device for comprehensive detection of crane track and comprehensive detection method | |
| CN105953744A (en) | Railway tunnel gauge dynamic detection system and method | |
| JP5669195B2 (en) | Surface shape measuring device and surface shape measuring method | |
| CN117781878A (en) | Empty rail contact net state detection method | |
| CN212721323U (en) | Shield tail clearance measuring device based on cross laser | |
| JP5952759B2 (en) | Overhead wire position measuring apparatus and method | |
| CN109238149B (en) | Vehicle body attitude detection device and contact line dynamic offset detection system | |
| JP6500560B2 (en) | Optical sensor calibration method and three-dimensional coordinate measuring machine | |
| CN115468510A (en) | Detection system, detection method and device for cross section profile of rail transit vehicle | |
| JP6308681B2 (en) | Crossover equipment monitoring device and method | |
| CN114935308A (en) | Train pantograph abrasion detection method based on curve registration algorithm | |
| CN209783519U (en) | Hybrid contact net contact rail geometric parameters detection device | |
| JPH11142124A (en) | Method and equipment for measuring sectional shape of rail | |
| KR101833055B1 (en) | 3-dimensional measuring system | |
| CN111426278A (en) | Dynamic measurement method for blade tip clearance of mine ventilator | |
| Li et al. | Research on the measurement of the large-components flatness based on gravitational straightedge method of adaptive two-end growth |
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 |