CN115239792B - Representative profile generation method for rail grinding - Google Patents
Representative profile generation method for rail grinding Download PDFInfo
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- CN115239792B CN115239792B CN202211143526.6A CN202211143526A CN115239792B CN 115239792 B CN115239792 B CN 115239792B CN 202211143526 A CN202211143526 A CN 202211143526A CN 115239792 B CN115239792 B CN 115239792B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
- G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B31/00—Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
- E01B31/02—Working rail or other metal track components on the spot
- E01B31/12—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails
- E01B31/17—Removing metal from rails, rail joints, or baseplates, e.g. for deburring welds, reconditioning worn rails by grinding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
Abstract
The invention discloses a representative profile generation method for rail grinding, which relates to the technical field of data processing and data fusion, and specifically comprises the following steps: acquiring an effective profile, namely acquiring a measuring profile aligned with a standard profile, calculating the area of a region formed by adjacent points of each measuring profile and the standard profile by being equivalent to a trapezoid or a triangle, and screening all profiles meeting preset conditions to obtain an effective profile set; generating a representative profile, namely selecting a reference profile from the effective profile set, and calculating the average coordinate of projection points of each point in the reference profile to all profiles in the effective profile set so as to obtain the representative profile; according to the invention, the interference information of the measuring profile can be effectively eliminated through the steps, a representative profile with higher effectiveness is generated, the grinding speed of the track is improved, the manual workload is reduced, and the influence of subjective factors is avoided.
Description
Technical Field
The invention relates to the technical field of data processing and data fusion, in particular to a representative profile generation method for rail grinding.
Background
The rail grinding can eliminate the surface defects of corrugation, side grinding, fat edge and the like on the surface of the rail, effectively prevent and slow down the occurrence of rail diseases, and improve the smoothness of the rail.
Current orbital sanding work often uses a means for a technician at the sanding site to select from historical sanding patterns based on experience or to manually measure custom sanding patterns, wherein the representative profile used for sanding is typically the first measured profile used for the sanding section or the most demanding of all the measured profiles that meet certain requirements. However, the representative profile is selected randomly and is easily influenced by the interference of the measuring profile, so that the selected representative profile is not ideal or invalid, the grinding efficiency is low, and the grinding amount is easily excessive or insufficient; meanwhile, the grinding machine depends on manual experience too much, large human subjective factor influence exists, the workload of technicians is large, and the grinding efficiency is low. The invention therefore proposes a method for automatically generating a representative profile for orbital grinding based on data processing and data fusion techniques.
Disclosure of Invention
The invention aims to: the representative profile generating method for rail grinding is used for reducing the influence of human subjective factors, reducing the workload of technicians and improving the grinding efficiency and the grinding precision so as to solve the problems that the representative profile is easy to interfere, the selected representative profile is not ideal or invalid, the grinding amount is easily too large or not enough, the influence of the human subjective factors is large, and the workload of the technicians is large in the conventional rail grinding working method.
The technical scheme of the invention is as follows:
a representative profile generation method for orbital lapping, comprising the steps of:
acquiring measurement profiles aligned with the standard profiles, and calculating the area of a region formed by adjacent points of each measurement profile and the standard profiles;
judging whether the measurement profile is an effective profile or not according to a preset condition;
screening all profiles which accord with preset conditions to obtain an effective profile set;
selecting the profile with the least points from the effective profile set as a reference profile;
and calculating the average coordinate of the shortest projection point from each point in the reference profile to all the profiles in the effective profile set to obtain the representative profile.
Further, the area formed by the points adjacent to the standard profile and the measurement profile at least includes any one of the following situations:
when two continuous adjacent points of the measuring profile are above the standard profile, the area corresponding to the region formed by the adjacent points of the measuring profile and the standard profile is a positive area;
when two continuous adjacent points of the measuring profile are positioned below the standard profile, the area corresponding to the area formed by the adjacent points of the measuring profile and the standard profile is a negative product;
when two continuous adjacent points of the measuring profile are distributed up and down of the standard profile, the area corresponding to the area formed by the adjacent points of the measuring profile and the standard profile is a positive area and a negative area.
Further, the air conditioner is provided with a fan,
when two continuous adjacent points of the measuring profile are distributed above or below the standard profile, area calculation is carried out by being equivalent to a trapezoid;
when two continuous adjacent points of the measuring profile are distributed above and below the standard profile, area calculation is carried out through the equivalent of a triangle;
traversing each point of each measuring profile, and calculating the area of a region formed by each measuring profile and the adjacent points of the standard profile by being equivalent to a trapezoid and/or a triangle to obtain three values of a positive area s1, a negative area s2 and a positive area s and a negative area s between the measuring profile and the standard profile;
by analogy, when the total number of the measurement profiles is n, all the measurement profiles are calculated to obtain a positive area set s (n), a negative area set s1 (n) and a positive area set s2 (n).
Further, the data in the positive and negative area sets s (n), the positive area set s1 (n), and the negative area set s2 (n) are sorted in an ascending order, so as to facilitate the subsequent calculation and screening of quartile.
Further, screening the area profiles meeting the preset conditions to obtain an effective profile set, wherein the effective profile set comprises distinguishing the effective profiles of the data sorted in the ascending order by a quartile calculation method;
the specific formula of the quartile calculation is as follows:
s(1/4) = s(1/n)；
s(3/4) = s(3/n)；
wherein n is the total number of the measuring profiles, and is rounded at 1/n and rounded at 3/n;
by analogy, the quartile numbers of the positive area s, the negative area s1 and the negative area s2 between the measured profile and the standard profile are respectively s (1/4) and s (3/4) through calculation; s1 (1/4), s1 (3/4); s2 (1/4), s2 (3/4).
Further, the preset condition is that when the quartile of the positive and negative areas, the positive area and the negative area is between the quartile and the three-quartile, the measuring profile is an effective profile,
i.e. when s (1/4) < s (n) < s (3/4), s1 (1/4) < s1 (n) < s1 (3/4), s2 (1/4) < s2 (n) < s2 (3/4), the measurement profile is an effective profile;
screening all the measurement profiles which meet preset conditions to obtain an effective profile set; and deleting the measurement profile which does not meet the preset condition.
Further, a reference profile is extracted from the set of effective profiles, wherein the reference profile is the profile with the least number of points in the set of effective profiles.
Further, obtaining a representative profile by calculating an average coordinate of a shortest projection point of each point in the reference profile to all profiles in the effective profile set, including:
calculating the projection point coordinates of a one-to-one corresponding point pair from each point in the reference profile to each profile in the effective profile set to obtain a projection point coordinate set;
calculating the average value of the coordinates of all the points in the projection point coordinate set to obtain the average coordinate of the projection points;
thereby calculating the average coordinate set of projection points of the reference profile to the effective profile set, and generating the representative profile.
The representative profile generated by the method can further eliminate the interference information of the measuring profile, so that the obtained representative profile has higher effectiveness.
Further, the calculating the coordinates of the projection points of the one-to-one corresponding point pair from each point in the reference profile to each profile in the effective profile set to obtain a projection point coordinate set includes:
the corresponding point pairs are all points in one profile point set in the effective profile set by traversing, and the point pairs which are closest to the p1 point in the reference profile and distributed at two sides of the p1 point in the profile point set are extracted;
calculating the projection point coordinates of the straight line from the point p1 in the reference profile to the corresponding point pair;
and by analogy, calculating a projection point coordinate set from the point p1 in the reference profile to the effective profile set.
Further, calculating the average value of the coordinates of all the points in the projected point coordinate set, thereby obtaining the average coordinate of the projected points from the point p1 in the reference profile to the effective profile set;
and by analogy, calculating to obtain the average coordinate of the projection point from each point in the reference profile to the effective profile set, and obtaining the average coordinate set of the projection point, thereby generating the representative profile.
Compared with the prior art, the invention has the beneficial effects that:
1. the scheme can effectively eliminate the interference information of the measuring profile, generate a representative profile with higher effectiveness;
2. the generated representative profile for rail grinding is realized through the steps, the grinding of the rail is facilitated, the grinding speed is improved, meanwhile, the manual workload is reduced, and the influence of subjective factors is avoided.
Drawings
FIG. 1 is a schematic diagram of the constituent regions of a standard profile and a measurement profile.
Fig. 2 is a schematic view of a pair of points in the reference profile corresponding to the effective profile.
Detailed Description
The idea, the detailed description and the technical effects of the present invention are clearly and completely described below in conjunction with the embodiments and the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Example 1
The invention discloses a representative profile generation method for rail grinding, which comprises the following steps:
acquiring a measuring profile of a track, and aligning the measuring profile with a standard profile, wherein the alignment method can be realized by adopting the prior art, so the scheme of the alignment method is not described in detail;
the measurement profile aligned with the standard profile is obtained, and the area of a region formed by adjacent points of each measurement profile and the standard profile is calculated, wherein the region formed by the region comprises a positive product formed by the measurement profile above the standard profile, a negative product formed by the measurement profile below the standard profile, and a positive and negative area formed by the measurement profile above and below the standard profile, as shown in fig. 1.
The specific method for calculating the area of the region formed by the adjacent points of each measurement profile and the standard profile comprises the following steps:
when two continuous adjacent points on the measuring profile are above or below the standard profile, area calculation is carried out by being equivalent to a trapezoid;
when two continuous adjacent points on the measuring profile are distributed up and down on the standard profile, area calculation is carried out through the equivalent triangle;
namely, the area of the point forming region of each measuring profile adjacent to the standard profile is calculated by being equivalent to a trapezoid and/or being equivalent to a triangle.
Calculating the area of a region formed by adjacent points of each measuring profile and the standard profile by traversing each point of each measuring profile and by being equivalent to a trapezoid and/or being equivalent to a triangle to obtain a positive area s1, a negative area s2 and a positive area s and a negative area s between the measuring profile and the standard profile;
by analogy, when the total number of the measuring profiles is n, all the measuring profiles are calculated to obtain a positive area set s (n), a negative area set s1 (n) and a positive area set s2 (n).
According to the preset conditions, whether the measurement profile is the effective profile is judged, and the method specifically comprises the following steps:
respectively calculating the quartiles of the positive area, the negative area and the positive and negative areas in a positive area set s (n), a positive area set s1 (n) and a negative area set s2 (n) by using a quartile calculation method;
judging whether the measurement profile is an effective profile or not according to the range of the preset quartile;
when the quartiles of the positive area, the negative area and the positive and negative areas are all in the ranges of one-quarter digit and three-quarter digit, the measuring profile is an effective profile;
namely: the measurement profile is an effective profile when s (1/4) < s (n) < s (3/4), s1 (1/4) < s1 (n) < s1 (3/4), s2 (1/4) < s2 (n) < s2 (3/4).
When the area of a region formed by the adjacent points of the measurement profile and the standard profile meets a preset condition, namely when the measurement profile is judged to be an effective profile, screening the measurement profile and adding the measurement profile into an effective profile set;
when the area of the region formed by the adjacent points of the measurement profile and the standard profile does not meet the preset condition, namely when the measurement profile is judged not to be the effective profile, deleting the measurement profile;
through the mode, all the profile shapes meeting the preset conditions are screened to obtain the effective profile shape set, the interference information in the measuring profile shapes can be effectively reduced, the effectiveness of the effective profile shapes is improved, the orbital polishing efficiency and accuracy are further facilitated to be provided, meanwhile, the workload of manual screening is reduced, and the influence of subjective factors is avoided.
Selecting a reference profile from the set of effective profiles;
and calculating the average coordinate of the shortest projection point from each point in the reference profile to all profiles in the effective profile set to obtain the representative profile.
Example 2
On the basis of embodiment 1, in order to further obtain a representative profile with higher effectiveness, the invention provides a method for calculating average coordinates of an effective profile set to obtain the representative profile, which specifically comprises the following steps:
selecting a reference profile from the effective profile set, wherein the reference profile is the profile with the least points in the effective profile set;
calculating the projection point coordinates of the point p1 in the reference profile to the corresponding point of each profile in the effective profile set;
obtaining a projection point coordinate set from the point p1 in the reference profile to corresponding points of all profiles in the effective profile set;
calculating the average value of the coordinates of all the points in the projection point coordinate set to obtain the projection point average coordinate of the point p 1;
and by analogy, acquiring the average coordinates of the projection points from all the points in the reference profile to the effective profile set to obtain a projection point average coordinate set, namely the representative profile point set.
The projection point coordinate specifically comprises the following calculation steps:
firstly, traversing all points in a point set M1 of one profile in an effective profile set, and extracting point pairs q1 and q2 which are closest to a point p1 in the reference profile and distributed at two sides of the point p1, as shown in the attached figure 2;
by analogy, the corresponding point of each profile can be obtained;
calculating the coordinate of the projection point of the point p1 on the point-to-line q1q2, namely the coordinate of the shortest projection point;
and by analogy, calculating the shortest projection point coordinates from the p1 point to all the profiles in all the effective profile sets, thereby obtaining the projection point coordinate set corresponding to all the effective profiles and having the positions corresponding to the p1 point one by one.
By the method for calculating the average coordinate of the projection point, the probability of occurrence of non-ideal or invalid conditions of the representative profile can be further reduced, and the effectiveness of the representative profile is further improved.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which all belong to the protection scope of the present application.
Claims (9)
1. A method of generating a representative profile for orbital lapping comprising the steps of:
obtaining effective profile shapes, namely obtaining the measurement profile shapes aligned with the standard profile shapes, calculating the area of a region formed by adjacent points of each measurement profile shape and the standard profile shape by being equivalent to a trapezoid and/or a triangle, and screening all profile shapes meeting preset conditions to obtain an effective profile shape set, wherein the preset conditions are that the quartile is greater than the quarter digit and less than the three quarters digit; judging the effective profile of the area data sorted in ascending order by a quartile calculation method;
and generating a representative profile, namely selecting a reference profile from the effective profile set, wherein the reference profile is the profile with the least number of points in the effective profile set, and calculating the average coordinate of the projection points of each point in the reference profile to all the profiles in the effective profile set to obtain a projection point average coordinate set, namely a representative profile point set, so as to generate the representative profile.
2. A method for generating a representative profile for orbital lapping according to claim 1, wherein the area of the point constituting region adjacent to said standard profile for each of said measurement profiles is:
when two continuous adjacent points on the measuring profile are above the standard profile, the area corresponding to the area formed by the adjacent points of the measuring profile and the standard profile is a positive area;
when two continuous adjacent points on the measuring profile are positioned below the standard profile, the area corresponding to the area formed by the adjacent points of the measuring profile and the standard profile is a negative product;
when two continuous adjacent points on the measuring profile are distributed up and down on the standard profile, the area corresponding to the area formed by the adjacent points of the measuring profile and the standard profile is a positive area and a negative area.
3. A representative profile generating method for orbital lapping according to claim 1, wherein said calculating the area of the point constituting region of each of said measurement profiles adjacent to said standard profile by being equivalent to a trapezoid and/or being equivalent to a triangle is characterized by:
when two continuous adjacent points on the measuring profile are above or below the standard profile, area calculation is carried out by being equivalent to a trapezoid;
when two consecutive adjacent points on the measurement profile are distributed above and below the standard profile, the area calculation is performed by being equivalent to a triangle.
4. A representative profile generating method for orbital lapping according to claim 3, wherein said calculating the area of the point constituting region of each of said measurement profiles adjacent to said standard profile by being equivalent to a trapezoid and/or being equivalent to a triangle is specifically: traversing each point of each measuring profile, and calculating the area of a region formed by each measuring profile and the adjacent points of the standard profile by being equivalent to a trapezoid and/or a triangle to obtain a positive area s1, a negative area s2 and a positive area s and a negative area s between the measuring profile and the standard profile;
by analogy, all the measurement profiles are calculated to obtain a positive and negative area set s (n), a positive area set s1 (n) and a negative area set s2 (n), wherein n is the total number of the measurement profiles.
5. The method for generating a representative profile for orbital lapping according to claim 1, wherein said screening all profiles that meet a predetermined condition to obtain an effective profile set comprises:
judging whether the measuring profile is an effective profile or not according to a preset condition;
screening the measuring profile and adding the measuring profile into an effective profile set when the measuring profile is judged to be the effective profile;
deleting the measurement profile when the measurement profile is judged not to be the valid profile.
6. The method for generating the representative profile for track grinding according to claim 5, wherein the step of judging whether the measurement profile is the effective profile according to the preset condition is specifically as follows:
respectively calculating the quartile of the positive area, the negative area and the positive area and the negative area by using a quartile calculation method;
and when the quartiles of the positive area, the negative area and the positive and negative areas are all larger than one-fourth digit and smaller than three-fourth digit, judging that the measurement profile is an effective profile.
7. The method of claim 1, wherein the representative profile is generated by a profile generator,
said calculating the average coordinates of the projection points of each point in said reference profile to all profiles in said set of effective profiles comprises:
calculating the projection point coordinates of the one-to-one corresponding point pair from each point in the reference profile to each profile in the effective profile set to obtain a projection point coordinate set;
calculating the average value of the coordinates of all the points in the projection point coordinate set to obtain the average coordinate of the projection points;
thereby calculating the average coordinate set of projection points of the reference profile to the effective profile set, and generating the representative profile.
8. The method according to claim 7, wherein said calculating the coordinates of the projection points of each point in the reference profile to the one-to-one corresponding point pair of each profile in the set of effective profiles to obtain a set of projection point coordinates comprises:
the corresponding point pairs are all points in one profile point set in the effective profile set by traversing, and the point pairs which are closest to the p1 point in the reference profile and distributed at two sides of the p1 point in the profile point set are extracted;
calculating the projection point coordinates of the straight line from the point p1 in the reference profile to the corresponding point pair;
and by analogy, calculating a projection point coordinate set from the point p1 in the reference profile to the effective profile set.
9. A method for generating a representative profile for track grinding according to claim 8, wherein said calculating the average value of the coordinates of all points in said set of projected point coordinates obtains the projected point average coordinates; thereby calculating and obtaining a projection point average coordinate set of the reference profile to the effective profile set, thereby generating a representative profile, specifically:
calculating the average value of the coordinates of all the points in the projection point coordinate set, thereby obtaining the projection point average coordinate of the p1 point in the reference profile;
and by analogy, calculating to obtain the average coordinate of the projection point from each point in the reference profile to the effective profile set, and obtaining the average coordinate set of the projection point, thereby generating the representative profile.
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