CN112146605A - Method and system for measuring pull-out value of contact network - Google Patents

Method and system for measuring pull-out value of contact network Download PDF

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CN112146605A
CN112146605A CN202010996681.7A CN202010996681A CN112146605A CN 112146605 A CN112146605 A CN 112146605A CN 202010996681 A CN202010996681 A CN 202010996681A CN 112146605 A CN112146605 A CN 112146605A
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pull
slide plate
out value
value
pressure
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CN112146605B (en
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车显达
刘冶
李云龙
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Beijing Yunda Huakai Technology Co ltd
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Beijing Yunda Huakai Technology Co ltd
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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
    • G01B21/02—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 length, width, or thickness

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Abstract

The invention provides a method for measuring a pull-out value of a contact net, which comprises the following steps: acquiring pressure signals at two sides of a pantograph slide plate; determining pressure values born by two sides of the pantograph slide plate according to the pressure signals; according to the pressure values born by the two sides of the pantograph slide plate and the preset distance difference value between the two sides of the pantograph slide plate, the position information of the contact net on the pantograph slide plate is determined through pressure point position calculation; and calculating the absolute difference value between the position information and the middle point of the pantograph slide plate according to the position information, and determining the absolute difference value as the pull-out value of the overhead line system. The method and the device can monitor the pull-out value of the contact net on the route, and solve the problem that the measurement of the pull-out value of the contact net is difficult and inconvenient. The invention has the beneficial effects that: the pull-out value condition on the line can be visually observed, and the change condition of the pull-out value at the same place on the line can be judged through comparison of the pull-out value detection tables every time, so that the situation is prevented.

Description

Method and system for measuring pull-out value of contact network
Technical Field
The invention relates to the field of rail transit, in particular to a method and a system for measuring a pull-out value of a contact network.
Background
At present, manual inspection is mainly adopted for detecting the pull-out value of the overhead line system, and the deviation value of the overhead line system relative to the central line of two rails is measured. And (3) adopting machine vision imaging, and calculating the position of the contact net relative to the center of the pantograph slide plate by an image recognition method to judge the size of the pull-out value.
However, manual inspection is adopted, which is not only labor-consuming and time-consuming, but also requires the detection process to occupy the road, and the detection time is limited by the operation time. And adopt machine vision formation of image to receive the ambient light influence great, need carry out the light filling to the environment, and the visual element needs regularly clean, and the total detection precision is lower, can appear pulling out the phenomenon that the value detected incorrectly moreover.
Disclosure of Invention
The invention provides a method for measuring a pull-out value of a contact net, which is used for solving the problem that the measurement of the pull-out value of the contact net is difficult and inconvenient.
A method for measuring a pull-out value of a catenary is characterized by comprising the following steps:
acquiring pressure signals at two sides of a pantograph slide plate;
determining pressure values born by two sides of the pantograph slide plate according to the pressure signals;
according to the pressure values born by the two sides of the pantograph slide plate and the preset distance difference value between the two sides of the pantograph slide plate, the position information of the contact net on the pantograph slide plate is determined through pressure point position calculation;
and calculating the absolute difference value between the position information and the middle point of the pantograph slide plate according to the position information, and determining the absolute difference value as the pull-out value of the overhead line system.
As an embodiment of the present invention, the calculating of the position of the pressure point includes:
according to the pressure values born by the two sides of the pantograph slide plate, determining the distance proportion from the pressure points to the two sides of the pantograph slide plate in a lever calculation mode;
according to the distance proportion, calculating through the distance difference between the contact net and the two sides of the preset pantograph slide plate, and determining the position information of the contact net on the pantograph slide plate;
the pressure point location is calculated as follows:
L1×F1＝L2×F2
wherein L is1At pressure point to one side of pantograph slideDistance, L2The distance between the pressure point and the other side of the pantograph slide plate, F1Is the pressure value between the pressure point and one side of the pantograph slide plate, F2Is the pressure value between the pressure point and the other side of one side of the pantograph slide plate, L1、L2Size unknown F1、F2The size is known and is obtained by the following formula:
Figure BDA0002692834970000021
according to the preset distance difference L between two sides of the pantograph slide plate1+L2Determining the distance values of the two sides;
Figure BDA0002692834970000022
according to said L1By the value of L2＝L-L1Determining L2The value of (c).
As an embodiment of the present invention, the calculating, according to the position information, an absolute difference between the position information and a midpoint of the pantograph pan, and determining the absolute difference as a catenary pull-out value includes:
determining the position information of the middle point of the pantograph slide plate according to the preset distance difference value of the two sides of the pantograph slide plate;
according to the position information of the middle point, determining the pull-out value of the contact net through the position calculation of the pressure point;
the pull-out value calculation process is as follows:
Figure BDA0002692834970000031
wherein T is the pull-out value of the overhead line system.
As an embodiment of the present invention, the method further includes:
according to the pull-out value, the train driving mileage is taken as an abscissa, the pull-out value is taken as an ordinate, the upper limit of the pull-out value is set, and a monitoring meter of the pull-out value of the contact network is determined, wherein the monitoring meter specifically comprises the following steps:
step 1, obtaining a first change curve of a pull-out value based on a time line through a preset comparison schedule according to the pull-out value;
step 2, determining the running speed of the train according to the preset comparison schedule, and obtaining the train running mileage based on the time line;
step 3, comparing and calculating the first change curve and the train driving mileage through an equal time line, and determining a second change curve based on a pull-out value of the train driving mileage;
and 4, determining a monitoring table of the pull-out value of the overhead line system according to the second variation curve and by presetting the upper limit of the pull-out value.
As an embodiment of the present invention, the method further comprises:
and verifying the pull-out value, wherein the steps are as follows:
step 1: according to the position information, determining a position parameter W through the left side x of the pantograph, the right side y of the pantograph and a position coefficient z:
Figure BDA0002692834970000032
step 2: according to the position parameter W and the distance set A of any pressure point and the middle point of the sliding plate, { a ═ a }1，a2，a3……aiDetermine the absolute difference L of the pull-out values:
Figure BDA0002692834970000041
wherein n represents the total number of the acquired distance values between the pressure points and the middle point of the sliding plate; a is aiThe distance value between the ith pressure point and the middle point of the sliding plate is represented; the above-mentioned
Figure BDA0002692834970000043
The mean value of the distance values of the pressure points and the middle point of the sliding plate is represented; 1,2,3, … …, n;
and step 3: acquiring the related parameter K, and determining the accuracy H of the pull-out value:
Figure BDA0002692834970000042
wherein, X isjRepresenting the jth preset judgment parameter; the m represents the number of preset judgment parameters; j ═ 1,2,3, … …, m; when H is more than or equal to 1, the pull-out value is accurate; when H < 1, the pull-out value is accurate; said XjIndicating the jth preset judgment parameter.
A system for measuring a catenary pull-out value, comprising:
the pressure signal acquisition module is used for acquiring pressure signals on two sides of the pantograph slide plate;
the pressure value determining module is used for determining the pressure values born by the two sides of the pantograph slide plate according to the pressure signals;
the position information determining module is used for determining the position information of the overhead line system on the pantograph slide plate through pressure point position calculation according to the pressure values born by the two sides of the pantograph slide plate and the preset distance difference value between the two sides of the pantograph slide plate;
and the pull-out value determining module is used for calculating the absolute difference value between the position information and the middle point of the pantograph slide plate according to the position information and determining the absolute difference value as the pull-out value of the overhead contact system.
As an embodiment of the present invention, the location information determining module includes:
the distance proportion determining unit is used for determining the distance proportion from the pressure point to the two sides of the pantograph slide plate in a lever calculation mode according to the pressure values born by the two sides of the pantograph slide plate;
the position information determining unit is used for calculating the distance difference between the contact net and the two sides of the preset pantograph slide plate according to the distance proportion to determine the position information of the contact net on the pantograph slide plate;
the pressure point position calculation process is as follows:
L1×F1＝L2×F2
wherein L is1Is the distance between the pressure point and one side of the pantograph slide plate, L2The distance between the pressure point and the other side of the pantograph slide plate, F1Is the pressure value between the pressure point and one side of the pantograph slide plate, F2Is the pressure value between the pressure point and the other side of one side of the pantograph slide plate, L1、L2Size unknown F1、F2The size is known and is obtained by the above formula:
Figure BDA0002692834970000051
according to the preset distance difference L between two sides of the pantograph slide plate1+L2To obtain
Figure BDA0002692834970000052
According to said L1By the value of L2＝L-L1Determining L2The value of (c).
As an embodiment of the present invention, the pull-out value determination module includes:
the intermediate point determining unit is used for obtaining the position information of the intermediate point of the pantograph slide plate according to the preset distance difference value of the two sides of the pantograph slide plate;
the pull-out value determining unit is used for obtaining the pull-out value of the contact net through position calculation with the pressure point according to the position information of the middle point;
the pull-out value calculation process is as follows:
Figure BDA0002692834970000061
wherein T is the pull-out value of the overhead line system.
As an embodiment of the present invention, the present invention further includes a monitoring table generating module:
the monitoring table generation module comprises:
the first change curve determining unit is used for obtaining a first change curve of the pull-out value based on the time line through a preset comparison schedule according to the pull-out value;
the train driving mileage determining unit is used for determining the driving speed of the train according to the preset comparison timetable and obtaining the train driving mileage based on the time line;
a second variation curve determination unit which determines a second variation curve based on a drawn value of the train mileage by comparing the first variation curve with the train mileage by an isochronal line;
and the pull-out value monitoring table determining unit determines a monitoring table of the pull-out value of the contact network according to the second variation curve and through a preset upper limit of the pull-out value.
As an embodiment of the present invention, the system further includes a pull-out value verification module:
step 1: according to the position information, determining a position parameter W through the left side x of the pantograph, the right side y of the pantograph and a position coefficient z:
Figure BDA0002692834970000062
step 2: according to the position parameter W and the distance set A of any pressure point and the middle point of the sliding plate, { a ═ a }1，a2，a3……aiDetermine the absolute difference L of the pull-out values:
Figure BDA0002692834970000063
wherein n represents the total number of the acquired distance values between the pressure points and the middle point of the sliding plate; a is aiThe distance value between the ith pressure point and the middle point of the sliding plate is represented; the above-mentioned
Figure BDA0002692834970000064
The mean value of the distance values of the pressure points and the middle point of the sliding plate is represented; 1,2,3, … …, n;
and step 3: acquiring the related parameter K, and determining the accuracy H of the pull-out value:
Figure BDA0002692834970000071
wherein, X isjRepresenting the jth preset judgment parameter; the m represents the number of preset judgment parameters; j ═ 1,2,3, … …, m; when H is more than or equal to 1, the pull-out value is accurate; when H < 1, the pull-out value is accurate; said XjIndicating the jth preset judgment parameter.
The invention has the beneficial effects that: all points on the line can be found quickly by scanning and detecting the whole line in the running process of the train, and the line can be detected once every train on the basis of pressure detection, so that real-time detection is realized. In addition, the contact net pull-out value monitoring table is generated, the pull-out value situation on the line can be visually observed, and the change situation of the pull-out value at the same place on the line can be judged through comparison of the pull-out value detection table every time, so that the situation is prevented.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a method for measuring a pull-out value of a catenary according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of force analysis and calculation of pull-out values in an embodiment of the present invention.
Fig. 3 is a system composition diagram of a system for measuring a catenary pull-out value according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
As shown in fig. 1 and person 2, the invention mainly aims at the problem that the pull-out value of a contact net is inconvenient to detect, and provides a method for measuring the pull-out value of the contact net, which comprises the following steps:
step 100: acquiring pressure signals at two sides of a pantograph slide plate;
step 101: determining pressure values born by two sides of the pantograph slide plate according to the pressure signals;
step 102: according to the pressure values born by the two sides of the pantograph slide plate and the preset distance difference value between the two sides of the pantograph slide plate, the position information of the contact net on the pantograph slide plate is determined through pressure point position calculation;
step 103: calculating an absolute difference value between the position information and a middle point of the pantograph slide plate according to the position information, and determining the absolute difference value as a pull-out value of the overhead contact system;
the principle of the technical scheme is as follows: when the contact net is arranged on the pantograph slide plate, the change of the position can be deduced through the change of the pressure at two ends, the pressure change values at two sides of the pantograph slide plate are collected through the pressure collecting device, the fulcrum is calculated according to the known force arm length and the total lever length, the calculated position of the fulcrum is the position of the contact net, and the pull-out value of the contact net at the position is obtained through calculation according to the difference value between the position of the contact net and a preset position; in the running process of the train, the positions of the encountered contact networks are changed, the change situation of the positions of the contact networks at each moment is calculated to obtain the change situation of the pull-out values of the contact networks on the running line of the train, the change situation of the pull-out values of the contact networks on the whole running line can be obtained according to the running mileage of the train corresponding to the timetable on the train, and finally, the abnormal points of the contact networks can be found quickly by setting the upper limit value of the pull-out values once the pull-out values of the contact networks exceed the upper limit, recording the time points exceeding the upper limit and the corresponding mileage.
The beneficial effects of the above technical scheme are: by scanning and detecting the whole line in the running process of the train, the pressure of all points on the line can be quickly found out, and the line can be detected once when the pressure passes through one train, so that real-time detection is realized. In addition, the contact net pull-out value monitoring table is generated, the pull-out value situation on the line can be visually observed, and the change situation of the pull-out value at the same place on the line can be judged through comparison of the pull-out value detection table every time, so that the situation is prevented.
In a preferred embodiment, the passing pressure point location calculation further comprises:
according to the pressure values born by the two sides of the pantograph slide plate, determining the distance proportion from the pressure points to the two sides of the pantograph slide plate in a lever calculation mode;
according to the distance proportion, calculating through the distance difference between the contact net and the two sides of the preset pantograph slide plate, and determining the position information of the contact net on the pantograph slide plate;
the pressure point position calculation process is as follows:
L1×F1＝L2×F2
wherein L is1、L2Size unknown F1、F2Of known size, L1Is the distance between the pressure point and the supporting leg on one side, L2Is the distance between the pressure point and the supporting foot on the other side, F1Is the pressure value on one side supporting foot, F2The pressure value on the supporting leg on the other side is obtained by the following formula:
Figure BDA0002692834970000091
and the distance difference L between the two sides of the pantograph slide plate is L1+L2To obtain
Figure BDA0002692834970000092
Calculate L1Then through L2＝L-L1Can obtain L2The value of (c).
The principle and the beneficial effects of the technical scheme are as follows: the pantograph slide plate is regarded as a stress lever, the contact net is regarded as a fulcrum, the proportional length of the force arm is judged according to the change of the forces on the two sides, and then the distance of the fulcrum relative to the stress point on one side is obtained according to the length of the lever. The whole model is scientific, rigorous and efficient.
In a preferred embodiment, the calculating, according to the position information, an absolute difference between the position information and a midpoint of the pantograph pan, and determining the absolute difference as a catenary pull-out value further includes:
obtaining position information of a middle point of the pantograph slide plate according to the preset distance difference value of the two sides of the pantograph slide plate;
according to the position information of the middle point, calculating the position of the middle point and the position of the pressure point to obtain a pull-out value of the contact net;
the pull-out value calculation process is as follows:
Figure BDA0002692834970000101
wherein T is the pull-out value of the overhead line system.
The principle and the beneficial effects of the technical scheme are as follows: the size of the pull-out value of the contact net is determined through the difference value between the position of the contact net on the pantograph slide plate and the preset position, the change condition of the pull-out value can be monitored in real time, and the monitoring process is more meticulous.
In a preferred embodiment, further comprising:
according to the pull-out value, the train driving mileage is taken as an abscissa, the pull-out value is taken as an ordinate, the upper limit of the pull-out value is set, and a monitoring meter of the pull-out value of the contact network is determined, wherein the steps comprise:
step 1, obtaining a first change curve of a pull-out value based on a time line through a preset comparison schedule according to the pull-out value;
step 2, determining the running speed of the train according to the preset comparison schedule, and obtaining the train running mileage based on the time line;
step 3, comparing and calculating the first change curve and the train driving mileage through an equal time line, and determining a second change curve based on a pull-out value of the train driving mileage;
and 4, determining a monitoring table of the pull-out value of the overhead line system according to the second variation curve and by presetting the upper limit of the pull-out value.
The principle and the beneficial effects of the technical scheme are as follows: the change relation of the pull-out value along with the train travel mileage is correspondingly obtained through the relation of the pull-out value along with the change of time and the relation of the pull-out value along with the change of time during the train traveling, then the contact net pull-out value monitoring table is obtained through setting the upper limit of the pull-out value, and the trend condition of the pull-out value change of the same place can be obtained through the contact net pull-out value monitoring table obtained through monitoring for multiple times on each traveling road section, so that the contact net is maintained and prevented from getting ill.
Preferably, the calculating, according to the position information, an absolute difference between the position information and a midpoint of the pantograph pan, and determining the absolute difference as a pull-out value of the overhead line system further includes:
step 1: according to the position information, determining a position parameter W through the position coefficient x at the left side of the pantograph, the position coefficient y at the right side of the pantograph and the position coefficient z:
Figure BDA0002692834970000111
step 2: according to whatThe position parameter W and the distance set A of any pressure point and the middle point of the sliding plate are { a }1，a2，a3……aiDetermining a pull-out value related parameter K:
Figure BDA0002692834970000112
wherein n represents the total distance between the pressure point and the middle point of the sliding plate; a is aiThe distance value between the ith pressure point and the middle point of the sliding plate is represented; 1,2,3, … …, n;
and step 3: acquiring the related parameter K, and determining the accuracy H of the pull-out value:
Figure BDA0002692834970000113
wherein, when H is more than or equal to 1, the pull-out value is accurate; when H < 1, the pull-out value is accurate; said XjIndicating the jth preset judgment parameter.
In the above technical scheme: after the pull-out value is calculated, the position parameters are calculated through the position coefficient of the left side of the pantograph, the position coefficient of the right side of the pantograph and the total position coefficient. In principle, the left side x of the pantograph, the right side y of the pantograph and the position coefficient z are all related to the position of the pull-out value, so that whether the pull-out value is correct or not can be calculated through the position parameters. The absolute difference value represents the tendency of each pull-out value, so that whether the pull-out value is correct or not is determined by establishing a pull-out value judgment model according to the pair difference value and then according to the tendency of the absolute difference value.
As shown in fig. 2 and the drawings, to achieve the above object, an embodiment of the present invention further provides a system for measuring a pull-out value of a catenary, including:
the pressure signal acquisition module is used for acquiring pressure signals on two sides of the pantograph slide plate;
the pressure value determining module is used for determining the pressure values born by the two sides of the pantograph slide plate according to the pressure signals;
the position information determining module is used for determining the position information of the overhead line system on the pantograph slide plate through pressure point position calculation according to the pressure values born by the two sides of the pantograph slide plate and the preset distance difference value between the two sides of the pantograph slide plate;
and the pull-out value determining module is used for calculating the absolute difference value between the position information and the middle point of the pantograph slide plate according to the position information and determining the absolute difference value as the pull-out value of the overhead contact system.
The principle of the technical scheme is as follows: when the contact net is arranged on the pantograph slide plate, the change of the position can be deduced through the change of the pressure at two ends, the pressure change values at two sides of the pantograph slide plate are collected through the pressure collecting device, the fulcrum is calculated according to the known force arm length and the total lever length, the calculated position of the fulcrum is the position of the contact net, and the pull-out value of the contact net at the position is obtained through calculation according to the difference value between the position of the contact net and a preset position; in the running process of the train, the positions of the encountered contact networks are changed, the change situation of the positions of the contact networks at each moment is calculated to obtain the change situation of the pull-out values of the contact networks on the running line of the train, the change situation of the pull-out values of the contact networks on the whole running line can be obtained according to the running mileage of the train corresponding to the timetable on the train, and finally, the abnormal points of the contact networks can be found quickly by setting the upper limit value of the pull-out values once the pull-out values of the contact networks exceed the upper limit, recording the time points exceeding the upper limit and the corresponding mileage.
The beneficial effects of the above technical scheme are: by scanning and detecting the whole line in the running process of the train, all fault points on the fault line can be quickly found, and the line can be detected once by one train, so that real-time detection is realized. In addition, the contact net pull-out value monitoring table is generated, the pull-out value situation on the line can be visually observed, and the change situation of the pull-out value at the same place on the line can be judged through comparison of the pull-out value detection table every time, so that the situation is prevented.
In a preferred embodiment, the location information determining module further includes:
the distance proportion determining unit is used for determining the distance proportion from the pressure point to the two sides of the pantograph slide plate in a lever calculation mode according to the pressure values born by the two sides of the pantograph slide plate;
the position information determining unit is used for calculating the distance difference between the contact net and the two sides of the preset pantograph slide plate according to the distance proportion to determine the position information of the contact net on the pantograph slide plate;
the pressure point position calculation process is as follows:
L1×F1＝L2×F2
wherein L is1Is the distance between the pressure point and one side of the pantograph slide plate, L2The distance between the pressure point and the other side of the pantograph slide plate, F1Is the pressure value between the pressure point and one side of the pantograph slide plate, F2Is the pressure value between the pressure point and the other side of one side of the pantograph slide plate, L1、L2Size unknown F1、F2The size is known and is obtained by the above formula:
to:
Figure BDA0002692834970000141
and the distance difference L between the two sides of the pantograph slide plate is L1+L2To obtain
Figure BDA0002692834970000142
ComputingGoes out of L1Then through L2＝L-L1Can obtain L2The value of (c).
The principle and the beneficial effects of the technical scheme are as follows: the pantograph slide plate is regarded as a stress lever, the contact net is regarded as a fulcrum, the proportional length of the force arm is judged according to the change of the forces on the two sides, and then the distance of the fulcrum relative to the stress point on one side is obtained according to the length of the lever. The whole model is scientific, rigorous and efficient.
In a preferred embodiment, the pull-out value determining module further includes:
the intermediate point determining unit is used for obtaining the position information of the intermediate point of the pantograph slide plate according to the preset distance difference value of the two sides of the pantograph slide plate;
the pull-out value determining unit is used for obtaining the pull-out value of the contact net through position calculation with the pressure point according to the position information of the middle point;
the pull-out value calculation process is as follows:
Figure BDA0002692834970000143
wherein T is the pull-out value of the overhead line system.
The principle and the beneficial effects of the technical scheme are as follows: the size of the pull-out value of the contact net is determined through the difference value between the position of the contact net on the pantograph slide plate and the preset position, the change condition of the pull-out value can be monitored in real time, and the monitoring process is more meticulous.
In a preferred embodiment, further comprising:
the monitoring meter generating module is used for setting the upper limit of the pull-out value and determining the monitoring meter of the pull-out value of the contact network according to the pull-out value and by taking the train mileage as an abscissa and the pull-out value as an ordinate, and the monitoring meter generating module comprises:
the first change curve determining unit is used for obtaining a first change curve of the pull-out value based on the time line through a preset comparison schedule according to the pull-out value;
the train driving mileage determining unit is used for determining the driving speed of the train according to the preset comparison timetable and obtaining the train driving mileage based on the time line;
a second variation curve determination unit which determines a second variation curve based on a drawn value of the train mileage by comparing the first variation curve with the train mileage by an isochronal line;
and the pull-out value monitoring table determining unit determines a monitoring table of the pull-out value of the contact network according to the second variation curve and through a preset upper limit of the pull-out value.
Preferably, the first and second liquid crystal materials are,
further comprising a pull-out value verification module:
step 1: according to the position information, determining a position parameter W through the left side x of the pantograph, the right side y of the pantograph and a position coefficient z:
Figure BDA0002692834970000151
step 2: according to the position parameter W and the distance set A of any pressure point and the middle point of the sliding plate, { a ═ a }1，a2，a3……aiDetermine the absolute difference L of the pull-out values:
Figure BDA0002692834970000161
wherein n represents the total number of the acquired distance values between the pressure points and the middle point of the sliding plate; a is aiThe distance value between the ith pressure point and the middle point of the sliding plate is represented; the above-mentioned
Figure BDA0002692834970000163
The mean value of the distance values of the pressure points and the middle point of the sliding plate is represented; 1,2,3, … …, n;
and step 3: acquiring the related parameter K, and determining the accuracy H of the pull-out value:
Figure BDA0002692834970000162
wherein, X isjRepresenting the jth preset judgment parameter; the m represents the number of preset judgment parameters; j ═ 1,2,3, … …, m; when H is more than or equal to 1, the pull-out value is accurate; when H < 1, the pull-out value is accurate; said XjIndicating the jth preset judgment parameter.
In the above technical scheme: after the pull-out value is calculated, the position parameters are calculated through the position coefficient of the left side of the pantograph, the position coefficient of the right side of the pantograph and the total position coefficient. In principle, the left side x of the pantograph, the right side y of the pantograph and the position coefficient z are all related to the position of the pull-out value, so that whether the pull-out value is correct or not can be calculated through the position parameters. The absolute difference value represents the tendency of each pull-out value, so that whether the pull-out value is correct or not is determined by establishing a pull-out value judgment model according to the pair difference value and then according to the tendency of the absolute difference value.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A method for measuring a pull-out value of a catenary is characterized by comprising the following steps:
acquiring pressure signals at two sides of a pantograph slide plate;
determining pressure values born by two sides of the pantograph slide plate according to the pressure signals;
according to the pressure values born by the two sides of the pantograph slide plate and the preset distance difference value between the two sides of the pantograph slide plate, the position information of the contact net on the pantograph slide plate is determined through pressure point position calculation;
and calculating the absolute difference value between the position information and the middle point of the pantograph slide plate according to the position information, and determining the absolute difference value as the pull-out value of the overhead line system.
2. The method for measuring the pull-out value of the overhead line system of claim 1, wherein the calculation of the position of the pressure point comprises the following steps:
according to the pressure values born by the two sides of the pantograph slide plate, determining the distance proportion from the pressure points to the two sides of the pantograph slide plate in a lever calculation mode;
according to the distance proportion, calculating through the distance difference between the contact net and the two sides of the preset pantograph slide plate, and determining the position information of the contact net on the pantograph slide plate;
the pressure point location is calculated as follows:
L1×F1＝L2×F2
wherein L is1Is the distance between the pressure point and one side of the pantograph slide plate, L2The distance between the pressure point and the other side of the pantograph slide plate, F1Is the pressure value between the pressure point and one side of the pantograph slide plate, F2Is the pressure value between the pressure point and the other side of the pantograph slide plate, L1、L2Size unknown F1、F2The size is known and is obtained by the following formula:
Figure FDA0002692834960000011
according to the preset distance difference L between two sides of the pantograph slide plate1+L2Determining the distance values of the two sides;
Figure FDA0002692834960000021
according to said L1By the value of L2＝L-L1Determining L2The value of (c).
3. The method for measuring the catenary pull-out value according to claim 2, wherein the step of calculating the absolute difference between the position information and the midpoint of the pantograph pan according to the position information and determining the absolute difference as the catenary pull-out value comprises the following steps:
determining the position information of the middle point of the pantograph slide plate according to the preset distance difference value of the two sides of the pantograph slide plate;
according to the position information of the middle point, determining the pull-out value of the contact net through the position calculation of the pressure point;
the pull-out value calculation process is as follows:
Figure FDA0002692834960000022
wherein T is the pull-out value of the overhead line system.
4. The method of claim 1, further comprising:
according to the pull-out value, the train driving mileage is taken as an abscissa, the pull-out value is taken as an ordinate, the upper limit of the pull-out value is set, and a monitoring meter of the pull-out value of the contact network is determined, wherein the monitoring meter specifically comprises the following steps:
step 1, obtaining a first change curve of a pull-out value based on a time line through a preset comparison schedule according to the pull-out value;
step 2, determining the running speed of the train according to the preset comparison schedule, and obtaining the train running mileage based on the time line;
step 3, comparing and calculating the first change curve and the train driving mileage through an equal time line, and determining a second change curve based on a pull-out value of the train driving mileage;
and 4, determining a monitoring table of the pull-out value of the overhead line system according to the second variation curve and by presetting the upper limit of the pull-out value.
5. The method of claim 3, further comprising:
and verifying the pull-out value, wherein the steps are as follows:
step 1: according to the position information, determining a position parameter W through the left side x of the pantograph, the right side y of the pantograph and a position coefficient z:
Figure FDA0002692834960000031
step 2: according to the position parameter W and the distance set A of any pressure point and the middle point of the sliding plate, { a ═ a }1，a2，a3……aiDetermine the absolute difference L of the pull-out values:
Figure FDA0002692834960000032
wherein n represents the total number of the acquired distance values between the pressure points and the middle point of the sliding plate; a is aiThe distance value between the ith pressure point and the middle point of the sliding plate is represented; the above-mentioned
Figure FDA0002692834960000033
The mean value of the distance values of the pressure points and the middle point of the sliding plate is represented; 1,2,3, … …, n;
and step 3: acquiring the related parameter K, and determining the accuracy H of the pull-out value:
Figure FDA0002692834960000034
wherein, X isjRepresenting the jth preset judgment parameter; the m represents the number of preset judgment parameters; j ═ 1,2,3, … …, m; when H is more than or equal to 1, the pull-out value is accurate; when H < 1, the pull-out value is accurate; said XjIndicating the jth preset judgment parameter.
6. A system for measuring a catenary pull-out value, comprising:
the pressure signal acquisition module is used for acquiring pressure signals on two sides of the pantograph slide plate;
the pressure value determining module is used for determining pressure values born by two sides of the pantograph slide plate according to the pressure signals;
the position information determining module is used for determining the position information of the overhead line system on the pantograph slide plate through pressure point position calculation according to the pressure values born by the two sides of the pantograph slide plate and the preset distance difference value between the two sides of the pantograph slide plate;
and the pull-out value determining module is used for calculating the absolute difference value between the position information and the middle point of the pantograph slide plate according to the position information and determining the absolute difference value as the pull-out value of the overhead contact system.
7. The system of claim 6, wherein the location information determining module comprises:
the distance proportion determining unit is used for determining the distance proportion from the pressure point to the two sides of the pantograph slide plate in a lever calculation mode according to the pressure values born by the two sides of the pantograph slide plate;
the position information determining unit is used for calculating the distance difference between the contact net and the two sides of the preset pantograph slide plate according to the distance proportion to determine the position information of the contact net on the pantograph slide plate;
the pressure point position calculation process is as follows:
L1×F1＝L2×F2
wherein L is1Is the distance between the pressure point and one side of the pantograph slide plate, L2The distance between the pressure point and the other side of the pantograph slide plate, F1Is the pressure value between the pressure point and one side of the pantograph slide plate, F2Is the pressure value between the pressure point and the other side of one side of the pantograph slide plate, L1、L2Size unknown F1、F2The size is known and is obtained by the above formula:
Figure FDA0002692834960000051
according to the preset distance difference L between two sides of the pantograph slide plate1+L2To obtain
Figure FDA0002692834960000052
According to said L1By the value of L2＝L-L1Determining L2The value of (c).
8. The system of claim 6, wherein the pull-out value determining module comprises:
the intermediate point determining unit is used for obtaining the position information of the intermediate point of the pantograph slide plate according to the preset distance difference value of the two sides of the pantograph slide plate;
the pull-out value determining unit is used for obtaining the pull-out value of the contact net through position calculation with the pressure point according to the position information of the middle point;
the pull-out value calculation process is as follows:
Figure FDA0002692834960000053
wherein T is the pull-out value of the overhead line system.
9. The system for measuring a catenary pull-out value of claim 6, wherein the system comprises a monitoring table generation module comprising:
the first change curve determining unit is used for obtaining a first change curve of the pull-out value based on the time line through a preset comparison schedule according to the pull-out value;
the train driving mileage determining unit is used for determining the driving speed of the train according to the preset comparison timetable and obtaining the train driving mileage based on the time line;
a second variation curve determination unit which determines a second variation curve based on a drawn value of the train mileage by comparing the first variation curve with the train mileage by an isochronal line;
and the pull-out value monitoring table determining unit determines a monitoring table of the pull-out value of the contact network according to the second variation curve and through a preset upper limit of the pull-out value.
10. The method of claim 8, wherein the system further comprises a pull-out value verification module:
step 1: according to the position information, determining a position parameter W through the left side x of the pantograph, the right side y of the pantograph and a position coefficient z:
Figure FDA0002692834960000061
step 2: according to the position parameter W and the distance set A of any pressure point and the middle point of the sliding plate, { a ═ a }1，a2，a3……aiDetermine the absolute difference L of the pull-out values:
Figure FDA0002692834960000062
wherein n represents the acquired pressureThe total number of distance values between the force point and the middle point of the sliding plate; a is aiThe distance value between the ith pressure point and the middle point of the sliding plate is represented; the above-mentioned
Figure FDA0002692834960000063
The mean value of the distance values of the pressure points and the middle point of the sliding plate is represented; 1,2,3, … …, n;
and step 3: acquiring the related parameter K, and determining the accuracy H of the pull-out value:
Figure FDA0002692834960000064
wherein, X isjRepresenting the jth preset judgment parameter; the m represents the number of preset judgment parameters; j ═ 1,2,3, … …, m; when H is more than or equal to 1, the pull-out value is accurate; when H < 1, the pull-out value is accurate; said XjIndicating the jth preset judgment parameter.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114139368A (en) * 2021-11-26 2022-03-04 中国铁道科学研究院集团有限公司 Method and system for identifying stress abnormity of contact net positioner

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09278380A (en) * 1996-04-08 1997-10-28 Mitsubishi Heavy Ind Ltd Wire sag control method and device for work barge
CN202255332U (en) * 2011-10-11 2012-05-30 北京鼎汉检测技术有限公司 Contact net developments pulling value detection device
KR101201244B1 (en) * 2011-07-11 2012-11-14 (주)카이센 System and method based on optical fiber sensor for evaluating load-carrying capacity of bridge
CN103105132A (en) * 2012-08-31 2013-05-15 成都唐源电气有限责任公司 Non-contact geometrical parameter detecting system based on machine vision
WO2016204385A1 (en) * 2015-06-15 2016-12-22 한국철도기술연구원 Method and apparatus for detecting vibration information of electric railway vehicle
CN207556715U (en) * 2017-09-29 2018-06-29 西南交通大学 A kind of bow net contact force measuring device
CN108332693A (en) * 2017-12-29 2018-07-27 深圳市越疆科技有限公司 Coordinate difference detection method and detecting system
CN110470194A (en) * 2019-08-30 2019-11-19 中国铁建电气化局集团第五工程有限公司 A kind of lever contact net leads the measuring device of height and stagger
CN209878605U (en) * 2019-03-29 2019-12-31 上海申通地铁集团有限公司 Detection system for pantograph-catenary system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09278380A (en) * 1996-04-08 1997-10-28 Mitsubishi Heavy Ind Ltd Wire sag control method and device for work barge
KR101201244B1 (en) * 2011-07-11 2012-11-14 (주)카이센 System and method based on optical fiber sensor for evaluating load-carrying capacity of bridge
CN202255332U (en) * 2011-10-11 2012-05-30 北京鼎汉检测技术有限公司 Contact net developments pulling value detection device
CN103105132A (en) * 2012-08-31 2013-05-15 成都唐源电气有限责任公司 Non-contact geometrical parameter detecting system based on machine vision
WO2016204385A1 (en) * 2015-06-15 2016-12-22 한국철도기술연구원 Method and apparatus for detecting vibration information of electric railway vehicle
CN207556715U (en) * 2017-09-29 2018-06-29 西南交通大学 A kind of bow net contact force measuring device
CN108332693A (en) * 2017-12-29 2018-07-27 深圳市越疆科技有限公司 Coordinate difference detection method and detecting system
CN209878605U (en) * 2019-03-29 2019-12-31 上海申通地铁集团有限公司 Detection system for pantograph-catenary system
CN110470194A (en) * 2019-08-30 2019-11-19 中国铁建电气化局集团第五工程有限公司 A kind of lever contact net leads the measuring device of height and stagger

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
杨庆和: "接触网动态质量分析系统的开发", 《铁道机车车辆》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114139368A (en) * 2021-11-26 2022-03-04 中国铁道科学研究院集团有限公司 Method and system for identifying stress abnormity of contact net positioner

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