CN105484115B - The quality determining method and system of a kind of section of track - Google Patents
The quality determining method and system of a kind of section of track Download PDFInfo
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- CN105484115B CN105484115B CN201510816215.5A CN201510816215A CN105484115B CN 105484115 B CN105484115 B CN 105484115B CN 201510816215 A CN201510816215 A CN 201510816215A CN 105484115 B CN105484115 B CN 105484115B
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- track
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B35/00—Applications of measuring apparatus or devices for track-building purposes
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- Machines For Laying And Maintaining Railways (AREA)
Abstract
The present invention discloses a kind of quality determining method of the section of track, including:Total powerstation is set up in the range of the center line of the section of track to be measured, and establishes and communicates with computer;Each position to be detected on the section of track to be measured is installed by detection prism respectively;By the one of detection prism of measurement head alignment of total powerstation, and operate computer control total powerstation and detection prism is measured;Total powerstation measures to remaining detection prism automatically, and obtains measurement result;Measurement result and standard section of track mass parameter are contrasted, and judge whether the quality of the section of track is qualified according to preparatory condition.The linkage that the present invention passes through total powerstation and computer, only need that total powerstation is directed at into first detection prism manually, just remaining position to be detected is measured automatically by total powerstation afterwards, compared to prior art, reduce manual intervention influence, automaticity greatly improves, and improves the accuracy of Data Detection.Invention additionally discloses a kind of quality detecting system of the section of track, its advantage are as described above.
Description
Technical field
The present invention relates to technological trajectory technical field of transportation, more particularly to a kind of quality determining method of the section of track.The present invention
Further relate to a kind of quality detecting system of the section of track.
Background technology
With the development of Chinese transportation transport service, increasing rail traffic vehicles have been used widely.
Common rail traffic vehicles include train, subway, light rail, motor-car etc., and compare forward position and minority generally
Magnetic suspension train.Magnetic suspension train utilizes magnet " same sex is mutually torn open " principle so that the compartment of train is suspended on rail, is hanged
Floating height is generally 1cm.Then the both sides of rail are again provided with magnet, and the acting as of the magnet turns to train, to be oriented to
Magnet.
Due to magnetic suspension train the speed of service quickly, 500km/h can be reached, therefore its safety in operation is worth examining
Study carefully.The factor of influence magnetic suspension train security is a lot, and the section of track is a wherein important ring.Due to the manufacturing of the section of track
There is deviation, or lifting and be easily deformed distorting in transportation, therefore after the section of track is installed on rail level, it is every
Quality index is required for strictly being checked.The check parameter of the section of track is generally its gauge, section of track length, the line style of the curve section of track
With the coplane degree of section of track magnetic pole strength etc..At present, the rule of the section of track is usually measured by gauging rule by craft, magnetic is measured by clearance gauge
Pole-face coplane degree, measure by steel tape section of track length, again by the curvature of section of track end and the vector distance difference inverse section of track at middle part half
Footpath and line style.
It is by having been manually done, not only due to every quality index detection after being laid in the prior art on the section of track
To lose time and energy, operation item is various, complicated, and also needs to carry out complicated calculating after measuring data, and error rate is high,
The quality testing of the section of track can not quickly and accurately be completed.Therefore, the detection of section of track quality how is easily and quickly completed, and
The accuracy of testing result is improved, is those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of quality determining method of the section of track, can fast and easy, be accurately performed to rail
The quality testing of row.It is a further object of the present invention to provide a kind of quality detecting system of the section of track.
In order to solve the above technical problems, the present invention provides a kind of quality determining method of the section of track, including:Total powerstation is set up
To in the range of the center line of the section of track to be measured, and by the total powerstation and the computer for being provided with standard section of track mass parameter inspection software
Establish communication;
Each position to be detected on the section of track to be measured is installed by each self-corresponding detection prism respectively;
The measurement head of the total powerstation is directed at one of them described detection prism, and operated described in the computer control
Total powerstation measures to the detection prism;
The total powerstation measures to detecting prism remaining described automatically, and obtains the survey of each position to be detected
Measure result;
The measurement result of each position to be measured and each self-corresponding standard gauge row mass parameter are contrasted, and root
Judge whether the quality of the section of track is qualified according to preparatory condition;
Also include before total powerstation detection prism described to first measures:Determine the temperature of working environment
And air pressure, and the temperature value measured and atmospheric pressure value are inputted into the total powerstation and carry out ranging amendment;
Judging the quality of the section of track, whether qualified preparatory condition specifically includes:Judge the measurement result and standard gauge
Whether the gap for arranging mass parameter is within ± 5%, qualified if being to be, if it is not, then unqualified;
The total powerstation establishes communication connection by communication and the computer.
The present invention a kind of quality detecting system of the section of track is also provided, including be set up in it is in the range of the center line of the section of track to be measured and right
It carries out the total powerstation of section of track mass parameter measurement, is provided with standard section of track mass parameter inspection software and leads to the total powerstation
Interrogate connection computer, be arranged on each position to be detected of the section of track to be measured and with the matching used inspection of the total powerstation
Survey prism;
Also include the ambient parameter detected being input in the total powerstation so that it carries out the temperature biography of ranging amendment
Sensor and baroceptor;
Also include being arranged at the wireless communication apparatus in the total powerstation and making it be communicated with the computer;
The computer is industrial computer.
The quality determining method of the section of track provided by the present invention, including:Total powerstation is set up into the center line model to the section of track to be measured
In enclosing, and total powerstation is established into communication with being provided with the computer of standard section of track mass parameter inspection software;On the section of track to be measured
Each position to be detected each self-corresponding detection prism is installed respectively;By the one of detection rib of measurement head alignment of total powerstation
Mirror, and operate computer control total powerstation and detection prism is measured;Total powerstation measures to remaining detection prism automatically,
And obtain the measurement result of each position to be detected;The measurement result of each position to be detected and each self-corresponding standard gauge are arranged
Mass parameter is contrasted, and judges whether the quality of the section of track is qualified according to preparatory condition.
The quality determining method of the section of track provided by the present invention, in the first step, total powerstation is installed in place first, makes it
In the range of the center line for setting up the section of track to be measured, while in order to avoid manual operation, total powerstation and computer are established and communicated, and
Standard section of track mass parameter inspection software being installed in advance in computer, total powerstation being controlled automatically with will pass through the software
System, makes its automatic measurement;In second step, installation detects prism respectively on each position to be detected on the section of track to be measured, and
And the difference of structure, shape, size due to position to be detected etc. is, it is necessary to use each self-corresponding detection prism;In the 3rd step
In, it is necessary first to manually by the one of detection prism of measurement head alignment of total powerstation, computer is then operated, makes the standard section of track
Mass parameter inspection software control total powerstation measures to the detection prism, i.e., the parameter of section of track position to be detected is surveyed
Amount;In the 4th step, when start-up by hand standard section of track mass parameter inspection software control total powerstation enters to first detection prism
After row measurement, total powerstation will carry out detecting remaining the measuring process of prism automatically, and obtain the survey of each position to be detected
Measure result.In the 5th step, after the measurement result for obtaining each position to be detected, itself and each self-corresponding standard gauge are arranged into matter
Amount parameter is contrasted, and refers to preparatory condition, judges whether measurement result is qualified, if it is, the quality of the section of track is closed naturally
Lattice, if it is not, then the quality of the section of track is naturally unqualified.To sum up, because the present invention passes through the linkage of total powerstation and computer, it is only necessary to
Total powerstation is directed at first detection prism manually, just remaining position to be detected measured automatically by total powerstation afterwards,
Compared to prior art, reducing excessive manual intervention influences, and automaticity greatly improves, and improves the essence of Data Detection
True property.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of flow chart of embodiment provided by the present invention;
Fig. 2 is a kind of overall structure diagram of embodiment provided by the present invention.
Wherein, in Fig. 1-Fig. 2:
The section of track -1 to be measured, total powerstation -2, computer -3, detect prism -4.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1 is refer to, Fig. 1 is a kind of flow chart of embodiment provided by the present invention.
In a kind of embodiment provided by the present invention, the quality determining method of the section of track mainly includes step S1:
Total powerstation is set up in the range of the center line of the section of track to be measured, and by total powerstation and standard section of track mass parameter inspection software is installed
Computer establish communication.Specifically, first total powerstation can be installed in place, it is set to set up the midline position to the section of track to be measured
Place, or set up on the section of track to be measured apart from the position of midline position nearby (for example distance is within 5cm).While in order to keep away
Manpower-free is operated, and total powerstation and computer are established and communicated, and is provided with standard section of track mass parameter in advance in computer
Inspection software, total powerstation being controlled with will pass through the software, making its automatic measurement.Herein preferably, can be by total powerstation frame
The centre position being set on the section of track to be measured or end position, so it is easy to total powerstation order to survey all detection prisms
Amount.Certainly, total powerstation can set up the optional position on the section of track to be measured in fact.Also, total powerstation is established with computer and communicated
Mode can pass through radio communication, such as WIFI, GSM, bluetooth etc..Certainly, total powerstation can also pass through cable and computer
Establish communication.
Step S2:Each position to be detected on the section of track to be measured is installed by each self-corresponding detection prism respectively.Specifically,
The difference of structure, shape, size due to position to be detected etc. is, it is necessary to use each self-corresponding detection prism.
Step S3:By the one of detection prism of measurement head alignment of total powerstation, and operate computer control total powerstation pair
Detection prism measures.Specifically, firstly the need of manually by the measurement head of total powerstation alignment wherein any one detection prism,
Pair then computer is operated, standard section of track mass parameter inspection software control total powerstation is measured the detection prism, i.e.,
The mass parameter of section of track position to be detected measures.
Step S4:Total powerstation measures to remaining detection prism automatically, and obtains the measurement knot of each position to be detected
Fruit.Because the action of total powerstation is controlled by the standard section of track mass parameter inspection software on computer, therefore work as total powerstation
After measuring first detection prism, it will continue to measure remaining detection prism automatically under software control, nothing
Manual-alignment need to be passed through again.In this way, after total powerstation is measured all detection prisms, you can obtain each to be checked on the section of track
The measurement result that location is put.
Step S5:The measurement result of each position to be measured and each self-corresponding standard gauge row mass parameter are contrasted,
And judge whether the quality of the section of track is qualified according to preparatory condition.Specifically, the difference such as shape and structure size due to position to be measured,
Therefore its mass parameter for measuring of needs may also be different, such as rail height, gauge, vector distance etc., judge the section of track quality whether
, it is necessary to which the measurement result of different positions to be measured is contrasted with each self-corresponding similar standard section of track mass parameter when qualified.
Also, judging the quality of the section of track, whether qualified preparatory condition can be:Judge the measurement result of each position to be detected with it is each
Whether the gap of self-corresponding standard section of track mass parameter is in ± 5%, if it is the matter that could judge the section of track to be measured to be
It is qualified to measure, and the measurement result of any one position to be detected is unqualified, then illustrates the off quality of the section of track to be measured.Certainly, should
Preparatory condition is not limited to the measurement result of above-mentioned each position to be detected and each self-corresponding standard gauge row mass parameter
Gap is in ± 5%, and remaining such as ± 8%, ± 10% etc. can also be used.
In summary, the quality determining method of the section of track provided by the present invention, due to the connection by total powerstation and computer
It is dynamic, it is only necessary to total powerstation is directed at first detection prism manually, just remaining position to be detected entered automatically by total powerstation afterwards
Row measurement, compared to prior art, reducing excessive manual intervention influences, and automaticity greatly improves, and improves data
The accuracy of detection.
In addition, in order to further improve the accuracy of section of track quality testing, the present embodiment detects in total powerstation to first
Before prism measures, first by sensor determine working environment temperature and air pressure, then by the temperature value measured with
Atmospheric pressure value is input in total powerstation carries out ranging amendment to it.
As shown in Fig. 2 Fig. 2 is a kind of overall structure diagram of embodiment provided by the present invention.
The present invention also provides a kind of quality detecting system of the section of track, mainly includes total powerstation 2, computer 3 and detection prism
4。
Wherein, total powerstation 2 is erected in the range of the center line of the section of track 1 to be measured, for example is located just on the center line of the section of track 1 to be measured
Or position within deviation center line 5cm etc., it is mainly used in carrying out mass parameter measurement to the section of track 1 to be measured.Pacify in computer 3
Equipped with standard section of track mass parameter inspection software, and computer 3 connects with the communication of total powerstation 2, such as by being arranged on whole station
Wireless communication apparatus in instrument 2 --- bluetooth module, WIFI module etc., or directly realized and connected by cable.The standard gauge
Row's mass parameter inspection software is the software for being industrially exclusively used in detecting section of track quality, in this way, computer 3 can be industrial electro
Brain.Certainly, in industrial computer, not there is the limit computer 3 intelligent terminal of communication function can also use for remaining.Work as whole station
After instrument 2 and the communication of computer 3 are established, you can control total powerstation 2 to measure by standard section of track mass parameter inspection software
Operation.Detection prism 4 is arranged on each opening position to be detected on the section of track 1 to be measured, is mainly supported the use with total powerstation 2.Complete
It is to measure the mass parameter of position to be detected by measuring detection prism 4 when instrument 2 of standing measures.
When proceeding by detection, it is necessary first to total powerstation 2 is directed at into one of detection prism 4, then operation calculates
Machine 3, total powerstation 2 is controlled to measure operation automatically by standard section of track mass parameter inspection software thereon, then when first
After individual detection being measured of prism 4, standard section of track mass parameter inspection software will automatically after remaining all detection prisms 4 according to
Secondary measurement.After all measurements of detection prism 4 terminate, you can obtain whole measurement results, then by itself and standard section of track quality
Parameter, which carries out contrast, can judge whether the laying quality of the section of track 1 to be measured is qualified.
Therefore, the quality detecting system of the section of track provided by the present invention, the linkage of total powerstation 2 and computer 3 is passed through, it is only necessary to
Total powerstation 2 is directed at first detection prism 4 manually, just remaining position to be detected surveyed automatically by total powerstation 2 afterwards
Amount, compared to prior art, reducing excessive manual intervention influences, and automaticity greatly improves, and improves Data Detection
Accuracy.
In addition, in order to improve the accuracy of testing result and reliability, the present embodiment is also additionally arranged treats the section of track 1 for detection
The temperature sensor of neighbouring temperature, and for detecting the baroceptor of air pressure near the section of track 1 to be measured.When temperature sensor and
After baroceptor detects real time data, then it is entered into total powerstation 2, total powerstation 2 is carried out ranging amendment, improves
The accuracy of measurement result.
In addition, the present embodiment realizes that the communication with computer 3 connects by being arranged on the wireless communication apparatus inside total powerstation 2
Connect, such as bluetooth module or WIFI module etc..Certainly, the present embodiment can realize total powerstation 2 with counting in a manner of used cable
The communication of calculation machine 3.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (2)
- A kind of 1. quality determining method of the section of track, it is characterised in that including:Total powerstation is set up into the center line scope to the section of track to be measured It is interior, and the total powerstation is established into communication with being provided with the computer of standard section of track mass parameter inspection software;Each position to be detected on the section of track to be measured is installed by each self-corresponding detection prism respectively;The measurement head of the total powerstation is directed at one of them described detection prism, and operates the computer and controls the whole station Instrument measures to the detection prism;The total powerstation measures to detecting prism remaining described automatically, and obtains the measurement knot of each position to be detected Fruit;The measurement result of each position to be detected and each self-corresponding standard gauge row mass parameter are contrasted, and according to Preparatory condition judges whether the quality of the section of track is qualified;Also include before total powerstation detection prism described to first measures:The temperature for determining working environment is gentle Pressure, and the temperature value measured and atmospheric pressure value are inputted into the total powerstation and carry out ranging amendment;Judging the quality of the section of track, whether qualified preparatory condition specifically includes:Judge the measurement result and standard section of track matter Whether the gap for measuring parameter is within ± 5%, qualified if being to be, if it is not, then unqualified;The total powerstation establishes communication connection by communication and the computer.
- 2. a kind of quality detecting system of the section of track, it is characterised in that including being set up in the range of the center line of the section of track to be measured and to it The total powerstation of section of track mass parameter measurement is carried out, standard section of track mass parameter inspection software is installed and communicated with the total powerstation The computer of connection, be arranged on each position to be detected of the section of track to be measured and with the matching used detection of the total powerstation Prism;Also include the ambient parameter detected being input in the total powerstation so that it carries out the temperature sensor of ranging amendment And baroceptor;Also include being arranged at the wireless communication apparatus in the total powerstation and making it be communicated with the computer;The computer is industrial computer.
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Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106123741A (en) * | 2016-06-12 | 2016-11-16 | 中铁第四勘察设计院集团有限公司 | A kind of medium-and low-speed maglev section of track assembly precision detection method |
CN111521164B (en) * | 2020-04-17 | 2021-06-04 | 中建五局土木工程有限公司 | Adjusting and detecting system and method for monorail track beam |
CN111497893B (en) * | 2020-04-17 | 2021-03-30 | 中建五局土木工程有限公司 | Track beam linear measuring system and method |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102979018A (en) * | 2012-11-28 | 2013-03-20 | 中铁十一局集团有限公司 | Ballast-installation and track-regulation measurement quick positioning method for ballast track engineering |
CN202849880U (en) * | 2012-03-26 | 2013-04-03 | 江代更 | A magnetic suspension track section measuring and adjusting system |
JP5511070B2 (en) * | 2010-06-22 | 2014-06-04 | 大成建設株式会社 | Orbit monitoring device and method |
CN104264546A (en) * | 2014-09-11 | 2015-01-07 | 中铁六局集团呼和浩特铁路建设有限公司 | Fine adjustment method of double-block type ballastless track construction track panel |
CN205171292U (en) * | 2015-11-23 | 2016-04-20 | 中铁十一局集团有限公司 | Quality inspection system of section of track |
-
2015
- 2015-11-23 CN CN201510816215.5A patent/CN105484115B/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5511070B2 (en) * | 2010-06-22 | 2014-06-04 | 大成建設株式会社 | Orbit monitoring device and method |
CN202849880U (en) * | 2012-03-26 | 2013-04-03 | 江代更 | A magnetic suspension track section measuring and adjusting system |
CN102979018A (en) * | 2012-11-28 | 2013-03-20 | 中铁十一局集团有限公司 | Ballast-installation and track-regulation measurement quick positioning method for ballast track engineering |
CN104264546A (en) * | 2014-09-11 | 2015-01-07 | 中铁六局集团呼和浩特铁路建设有限公司 | Fine adjustment method of double-block type ballastless track construction track panel |
CN205171292U (en) * | 2015-11-23 | 2016-04-20 | 中铁十一局集团有限公司 | Quality inspection system of section of track |
Non-Patent Citations (2)
Title |
---|
"上海磁悬浮列车轨道梁精调技术";高俊强;《测绘工程》;20050630;第14卷(第2期);第26页2节-第27页第4节,图1、2 * |
"全站仪免棱镜测量技术在中低速磁浮道岔安装工程中的应用";王军;《甘肃科技》;20150430;第31卷(第8期);第101页第4节,图5 * |
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