CN112146605B - 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 PDFInfo
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- CN112146605B CN112146605B CN202010996681.7A CN202010996681A CN112146605B CN 112146605 B CN112146605 B CN 112146605B CN 202010996681 A CN202010996681 A CN 202010996681A CN 112146605 B CN112146605 B CN 112146605B
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- 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
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 using an image recognition method to judge the pull-out value of the contact net.
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 ambient light to influence great, need carry out the light filling to the environment, and the vision component needs regularly clean, and the total detection precision is lower, can appear the contact net moreover and pull out the phenomenon that the value detected incorrectly.
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 a contact net pull-out value.
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 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 following formula:
according to the preset distance difference L between two sides of the pantograph slide plate1+L2Determining the distance values of the two sides;
according to the aboveL1By 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 of the pantograph slide plate, the position of the pressure point is calculated, and the pull-out value of the overhead line system is determined;
the calculation process of the pull-out value of the contact network comprises the following steps:
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 catenary pull-out value, train mileage is taken as an abscissa, the catenary pull-out value is taken as an ordinate, the upper limit of the catenary pull-out value is set, and a monitoring meter of the catenary pull-out value is determined, wherein the monitoring meter comprises the following specific steps:
step 1, obtaining a first change curve of the catenary pull-out value based on a time line through a preset comparison timetable according to the catenary 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 by an equal time line, and determining a second change curve of a contact net pulling value based on 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 of the overhead line system.
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 contact net 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 contact net pull-out value.
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:
according to the preset distance difference L between two sides of the pantograph slide plate1+L2To obtain
According to said L1By the value of L2＝L-L1Determining L2The value of (c).
As an embodiment of the present invention, the catenary pull-out value determining 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 contact net pull-out value determining unit is used for calculating the position of the pressure point according to the position information of the middle point of the pantograph slide plate to obtain a contact net pull-out value;
the calculation process of the pull-out value of the contact network comprises the following steps:
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 catenary pull-out value based on the time line through a preset comparison timetable according to the catenary 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;
the second change curve determining unit is used for determining a second change curve of a contact net pulling value based on the train driving mileage through comparison calculation of the equal time lines of the first change curve and the train driving mileage;
and the contact net pull-out value monitoring table determining unit is used for determining the monitoring table of the contact net pull-out value through presetting the upper limit of the contact net pull-out value according to the second change curve.
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 a contact net pull-out value in the embodiment of the 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 detection of the pull-out value of the overhead line system is inconvenient, and provides a method for measuring the pull-out value of the overhead line system, 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 contact net pull-out value;
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 position change condition of the contact networks at each moment is calculated, the change condition of the pull-out value of the contact networks on the running line of the train is obtained, the change condition of the pull-out value 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, the upper limit value of the pull-out value of the contact networks is set, once the pull-out value of the contact networks exceeds the upper limit, the time point exceeding the upper limit is recorded, the corresponding mileage is recorded, and abnormal points of the contact networks can be found quickly.
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 contact net pull-out value situation on the line can be visually observed, and the change situation of the contact net pull-out value at the same place on the line can be judged through comparison of the contact net pull-out value detection tables 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:
and the distance difference L between the two sides of the pantograph slide plate is L1+L2To obtain
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 of the pantograph slide plate, calculating the position of the pressure point to obtain a contact net pull-out value;
the calculation process of the pull-out value of the contact network comprises the following steps:
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 of the position of the contact net on the pantograph slide plate and the preset position, the change condition of the pull-out value of the contact net can be monitored in real time, and the monitoring process is more meticulous.
In a preferred embodiment, further comprising:
according to the catenary pull-out value, the train mileage is taken as an abscissa, the catenary pull-out value is taken as an ordinate, the upper limit of the catenary pull-out value is set, and a monitoring meter of the catenary pull-out value is determined, wherein the steps comprise:
step 1, obtaining a first change curve of the catenary pull-out value based on a time line through a preset comparison timetable according to the catenary 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 by an equal time line, and determining a second change curve of a contact net pulling value based on 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 of the overhead line system.
The principle and the beneficial effects of the technical scheme are as follows: the change relation of the contact net pull-out value along with the train travel mileage is correspondingly obtained through the relation of the contact net pull-out value along with the time change and the relation of the train travel along with the time change, then the contact net pull-out value monitoring table is obtained through setting the upper limit of the contact net pull-out value, the trend condition of the contact net pull-out value change in the same place can be obtained through the contact net pull-out value monitoring table obtained through multiple monitoring on each travel road section, and therefore the contact net is maintained and prevented from getting ill.
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 contact net 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 contact net pull-out value.
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 position change condition of the contact networks at each moment is calculated, the change condition of the pull-out value of the contact networks on the running line of the train is obtained, the change condition of the pull-out value 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, the upper limit value of the pull-out value of the contact networks is set, once the pull-out value of the contact networks exceeds the upper limit, the time point exceeding the upper limit is recorded, the corresponding mileage is recorded, and abnormal points of the contact networks can be found quickly.
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 contact net pull-out value situation on the line can be visually observed, and the change situation of the contact net pull-out value at the same place on the line can be judged through comparison of the contact net pull-out value detection tables 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:
and the distance difference L between the two sides of the pantograph slide plate is L1+L2To obtain
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 catenary 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 contact net pull-out value determining unit is used for calculating the position of the pressure point according to the position information of the middle point of the pantograph slide plate to obtain a contact net pull-out value;
the calculation process of the pull-out value of the contact network comprises the following steps:
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 of the position of the contact net on the pantograph slide plate and the preset position, the change condition of the pull-out value of the contact net can be monitored in real time, and the monitoring process is more meticulous.
In a preferred embodiment, further comprising:
the monitoring table generation module is used for setting the upper limit of the pull-out value of the overhead line system and determining the monitoring table of the pull-out value of the overhead line system according to the pull-out value of the overhead line system by taking the train mileage as an abscissa and taking the pull-out value of the overhead line system as an ordinate, and the monitoring table generation module comprises:
the first change curve determining unit is used for obtaining a first change curve of the catenary pull-out value based on the time line through a preset comparison timetable according to the catenary 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;
the second change curve determining unit is used for determining a second change curve of a contact net pulling value based on the train driving mileage through comparison calculation of the equal time lines of the first change curve and the train driving mileage;
and the contact net pull-out value monitoring table determining unit is used for determining the monitoring table of the contact net pull-out value through presetting the upper limit of the contact net pull-out value according to the second change curve.
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 (4)
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;
the passing pressure point position calculation 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:
according to the preset distance difference L between two sides of the pantograph slide plate1+L2Determining the distance values of the two sides;
according to said L1By the value of L2＝L-L1Determining L2A value of (d);
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 contact net pull-out value;
according to the catenary pull-out value, train mileage is taken as an abscissa, the catenary pull-out value is taken as an ordinate, the upper limit of the catenary pull-out value is set, and a monitoring meter of the catenary pull-out value is determined, wherein the monitoring meter comprises the following specific steps:
step 1, obtaining a first change curve of the catenary pull-out value based on a time line through a preset comparison timetable according to the catenary 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 by an equal time line, and determining a second change curve of a contact net pulling value based on 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 of the overhead line system.
2. The method for measuring the catenary pull-out value according to claim 1, 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 of the pantograph slide plate, the position of the pressure point is calculated, and the pull-out value of the overhead line system is determined;
the calculation process of the pull-out value of the contact network comprises the following steps:
wherein T is the pull-out value of the overhead line system.
3. 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;
the location information determination 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:
according to the preset distance difference L between two sides of the pantograph slide plate1+L2To obtain
According to said L1By the value of L2＝L-L1Determining L2A value of (d);
the contact net pull-out value determining module is used for 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 contact net pull-out value;
the system comprises a monitoring table generating module and comprises:
the first change curve determining unit is used for obtaining a first change curve of the catenary pull-out value based on the time line through a preset comparison timetable according to the catenary 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;
the second change curve determining unit is used for determining a second change curve of a contact net pulling value based on the train driving mileage through comparison calculation of the equal time lines of the first change curve and the train driving mileage;
and the contact net pull-out value monitoring table determining unit is used for determining the monitoring table of the contact net pull-out value through presetting the upper limit of the contact net pull-out value according to the second change curve.
4. The system of claim 3, wherein the catenary pull-out value determination 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 contact net pull-out value determining unit is used for calculating the position of the pressure point according to the position information of the middle point of the pantograph slide plate to obtain a contact net pull-out value;
the calculation process of the pull-out value of the contact network comprises the following steps:
wherein T is the pull-out value of the overhead line system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010996681.7A CN112146605B (en) | 2020-09-21 | 2020-09-21 | Method and system for measuring pull-out value of contact network |
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| CN202010996681.7A CN112146605B (en) | 2020-09-21 | 2020-09-21 | Method and system for measuring pull-out value of contact network |
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| 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 bow net system |
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| JP3722906B2 (en) * | 1996-04-08 | 2005-11-30 | 三菱重工業株式会社 | Wire sag control device for work boat |
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| CN207556715U (en) * | 2017-09-29 | 2018-06-29 | 西南交通大学 | A kind of bow net contact force measuring device |
| CN110470194B (en) * | 2019-08-30 | 2024-02-13 | 中国铁建电气化局集团第五工程有限公司 | Lever type contact net height guiding and pulling-out value measuring device |
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| 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 |
| WO2016204385A1 (en) * | 2015-06-15 | 2016-12-22 | 한국철도기술연구원 | Method and apparatus for detecting vibration information of electric railway vehicle |
| 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 bow net system |
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