CN102431577A - Monitoring technology of eddy current sensor for gap of turnout gap detection column and detection block - Google Patents
Monitoring technology of eddy current sensor for gap of turnout gap detection column and detection block Download PDFInfo
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- CN102431577A CN102431577A CN2011103166912A CN201110316691A CN102431577A CN 102431577 A CN102431577 A CN 102431577A CN 2011103166912 A CN2011103166912 A CN 2011103166912A CN 201110316691 A CN201110316691 A CN 201110316691A CN 102431577 A CN102431577 A CN 102431577A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- 238000005516 engineering process Methods 0.000 title claims description 9
- 238000001514 detection method Methods 0.000 title abstract description 6
- 239000000523 sample Substances 0.000 claims abstract description 30
- 238000012545 processing Methods 0.000 claims abstract description 5
- 238000007689 inspection Methods 0.000 claims description 52
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000001133 acceleration Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 12
- 230000035699 permeability Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
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- 230000003321 amplification Effects 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- -1 greasy dirt Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention relates to the field of ensuring travelling safety after great acceleration of the railway, in particular to the monitoring of sealing state of a turnout switch rail (point rail) and a stock rail (wing rail), which consists of a detection column a, a gap b of a detection block, a probe 1 of an eddy current sensor, an extension cable 2, a temperature sensor 3 and a comprehensive processing circuit 4. By adopting the above technical scheme, the invention solves the disadvantages of the turnout gap by means of mechanical contact or photoelectric detection and the blankness of monitoring by using the eddy current principle. Compared with the prior art, the invention has the advantages that the mechanical structure of the current point switch is unnecessarily changed, the non-contact measurement is adopted, the influences of dust, oil, oil stain and installation position can be avoided, the vibration misinformation caused by passing of the train can be avoided, and the digital output is realized. In addition, the invention also has high precision, high stability and low cost and is simple to install, etc.
Description
Technical field
The present invention relates to guarantee the traffic safety field behind the railway speed raising, specifically relate to reflect the monitoring of point tongue (heart rail) and stock rail (wing rail) close-fitting state.
Background technology
Present domestic railway and subway accident take place frequently, and cause situation such as train from overtaking collision, collision, derailing to take place.Along with China railways high speed, high density driving section constantly increase.In order to ensure traffic safety, require increasingly high to track switch utilization quality and state stability.Track switch and conversion equipment thereof are the important infrastructure devices of railway line, are again the weak links in the track simultaneously.The busy main track of high speed and main line electricity affair maintenance time is tight, task heavy, it is high to require, make to track switch utilization state carry out effectively, monitoring in real time is outstanding shows urgent and important.At present the monitoring equipment of the most of point machine breach of home or overseas is mechanical contact-type or photodetection formula equipment, because site environment is complicated, and influence such as mechanical contact-type is given a shock easily, gets rusty, rainwater is seen through, mechanics is malfunctioning; The photodetection formula then receives influences such as dust, grease, installation site easily.Phenomenons such as reporting by mistake, fail to report often appears; The work degree and the cost that normally use and increased several times maintainer of equipment have been influenced; Particularly the accuracy requirement of device for changing points and stability are the key foundation equipment that directly causes train overturning, derailing, collision; The Ministry of Railways has spent several hundred million inputs to upgrade, transform, increase the monitoring of relevant device in nearly one or two years for this reason, does not all play the essence effect.Through National IP Network's station inquiry, also there is not a patent to adopt this technology to monitor in the patent of having announced at present, other patent does not reach its real validity yet and solves the various problems that exists.
Summary of the invention
The technical matters that the present invention will solve is; Capture present edd current transducer probe diameter at the metallic conductor that can't detect 3 millimeters of distances below 8 millimeters; Overcome deficiency of the prior art; A kind of breach, the edd current transducer probe of inspection post, inspection piece, breach gap current vortex sensor monitoring technology of extending track switch breach inspection post with the inspection piece of compositions such as cable, temperature sensor, comprehensive treatment circuit utilized is provided; Reach and thoroughly to solve its stability, reliability; Let wrong report, rate of failing to report reduce to zero; The influence that edd current transducer reliable long-term working property is good, highly sensitive simultaneously, resolution is high, speed of response is fast, interference resistance by force, does not receive media such as greasy dirt, simple in structure, easy for installation is fit to various environment and uses down, possesses low cost, high efficiency, can solve the characteristics that can't solve many deficiencies at present.
The present invention is achieved through following technical scheme; Track switch breach inspection post and the breach gap current vortex sensor monitoring technology of checking piece are made up of breach b, edd current transducer probe 1, extension cable 2, temperature sensor 3, the comprehensive treatment circuit 4 of inspection post a, inspection piece.Principle of work is: through above-mentioned composition, after optimizing, the HF oscillation electric current in the comprehensive treatment circuit flows into the edd current transducer probe coil through extending cable, in the coil of edd current transducer probe head, produces alternating magnetic fields.If the breach one side (metallic conductor) of in the efficient range of this alternating magnetic field, not checking piece near, then this magnetic field energy can total loss.When we are installed in the edd current transducer probe in the inspection post; Suppose that the inspection post and the breach of inspection piece are in the normal operation gap width of track switch regulation; Then produce inducing current, be referred to as current vortex on the electro-magnetism on breach one side (metallic conductor) surface of this inspection piece.Meanwhile this current vortex field also produces a direction and head coil alternating magnetic field in the opposite direction; Because its counteraction; Make amplitude and the phase place of probe head coil high-frequency currents obtain changing (virtual impedance of coil), geometric configuration, physical dimension, power frequency and the probe head coil of breach one side (metallic conductor) permeability of this variation and inspection piece, conductivity, coil is to the relating to parameters such as distance of the breach one side (metallic conductor) of inspection piece.Usually breach one side (metallic conductor) material of supposition inspection piece evenly and performance be linearity and isotropic, then the physical property of the probe coil and the breach one side (metallic conductor) of inspection piece can be described with distance, intensity of current and the frequency parameter of the breach one side (metallic conductor) of inspection piece by conductivity, permeability, size factor, the probe head coil of the breach one side (metallic conductor) of inspection piece.Then the coil intrinsic impedance can use Z={ conductivity, permeability, size factor, probe head coil and the breach of checking piece distance simultaneously, intensity of current, frequency } function to represent.Usually we can accomplish to control conductivity, permeability, size factor; Intensity of current; This Several Parameters of frequency is constant within the specific limits, and then the intrinsic impedance Z of coil just becomes the one valued function of probe head coil and the distance of the breach one side of inspection piece, though its whole function is one nonlinear; Its function is characterized as " S " type curve, is approximately linear one section but can choose it.In this, through the processing of comprehensive treatment circuit, with the variation of coil impedance Z, promptly the probe head coil converts voltage or change in current to the variation of the distance of the breach one side of inspection piece.The size of output signal changes with the spacing of probe head to the breach of tested inspection piece one side (metallic conductor), gap current vortex sensor monitoring technology be exactly according to this principle realize to the breach one side (metallic conductor) of inspection piece displacement, vibrate isoparametric measurement.
Its working process is: (the edd current transducer probe is installed in the inspection post between the breach one side (metallic conductor) and edd current transducer probe of tested inspection piece; Edd current transducer probe head surface is concordant with that face of breach of checking the corresponding inspection piece of post) distance when changing; The virtual impedance of coil also changes in the edd current transducer probe; The variation of coil virtual impedance causes the variation of oscillating voltage amplitude in the edd current transducer probe; And this oscillating voltage with variable in distance becomes voltage (electric current) to change through detection, filtering, linear compensation, amplification normalizing treatment conversion; Convert digital signal output to through digital processing circuit again, finally accomplish mechanical shift (gap) and convert voltage (electric current) to.Make the user can grasp the variation of the breach gap numerical value of track switch breach inspection post and inspection piece in real time through remote transmission; Consider the influence of temperature to edd current transducer; In circuit, added temperature compensation function, made it guarantee gap numerical value output conformability at-55 ℃ to 85 ℃.
Track switch breach inspection post of the present invention is technological with the breach gap current vortex sensor monitoring of inspection piece, owing to adopted technique scheme, has solved the edd current transducer probe diameter and can detect breach 3 mm distance (can guarantee the numerical precision in present required track switch breach gap) of inspection post apart from the inspection piece below 8 millimeters; Advantage is compared with prior art arranged again: can not change present switch machine physical construction; Non-contact measurement is not influenced by dust, greasy dirt, grease, installation site etc., can anti-train through the time vibrations wrong report that produces; Digital quantity output; Precision is high, stability is high, and low cost is installed advantages such as simple.
Description of drawings
Fig. 1, track switch breach of the present invention inspection post and the technological scheme drawing of the breach gap current vortex sensor monitoring of inspection piece.
Reference numeral:
The breach b of inspection post a, inspection piece, edd current transducer probe 1, extension cable 2, temperature sensor 3, comprehensive treatment circuit 4.
The specific embodiment:
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail.
Embodiment one
Track switch breach inspection post as shown in Figure 1 and the breach gap current vortex sensor monitoring technology of checking piece are made up of breach b, edd current transducer probe 1, extension cable 2, temperature sensor 3, the comprehensive treatment circuit 4 of inspection post a, inspection piece.Comprehensive treatment circuit 4 medium high frequency oscillating currents are through producing alternating magnetic fields in the coil that extends cable 2 inflow edd current transducer probes 1; The a certain surface of breach b of tested inspection piece be installed in edd current transducer in the inspection post a and pop one's head in the corresponding surface distance of 1 head when changing; Mechanical shift (gap) converts voltage (electric current) to through comprehensive treatment circuit 4, obtains in situ temperature through temperature sensor 3 and after 4 digital processings of comprehensive treatment circuit, exports digital information.
Embodiment two
The breach gap current vortex sensor monitoring technology of track switch breach as shown in Figure 1 inspection post and inspection piece, edd current transducer probe 1 is installed in the switch machine inspection post a, and edd current transducer 1 diameter of popping one's head in is below 8 millimeters.Temperature sensor 3, comprehensive treatment circuit 4 are installed in connection box or the switch machine; Pop one's head in and 1 be connected through extending cable 2 and edd current transducer, the information after comprehensive treatment circuit 4 will be handled through long-range be connected to the alarm monitoring center or directly get into railway microcomputer chain.Other is with embodiment one.
Claims (2)
1. track switch breach inspection post and the breach gap current vortex sensor monitoring technology of checking piece are made up of breach b, edd current transducer probe (1), extension cable (2), temperature sensor (3), the comprehensive treatment circuit (4) of inspection post a, inspection piece;
It is characterized in that: comprehensive treatment circuit (4) medium high frequency oscillating current is through producing alternating magnetic fields in the coil that extends cable (2) inflow edd current transducer probe (1); The a certain surface of breach b of tested inspection piece is when being installed in the corresponding surface distance of edd current transducer probe (1) head in the inspection post a and changing; Mechanical shift (gap) converts voltage (electric current) to through comprehensive treatment circuit (4), obtains in situ temperature through temperature sensor (3) and after comprehensive treatment circuit (4) digital processing, exports digital information.
2. track switch breach inspection post as claimed in claim 1 is technological with the breach gap current vortex sensor monitoring of inspection piece; It is characterized in that: edd current transducer probe (1) is installed in the switch machine inspection post a, and edd current transducer probe (1) diameter is below 8 millimeters; Temperature sensor (3); Comprehensive treatment circuit (4) is installed in connection box or the switch machine; Through extend cable (2) and edd current transducer pop one's head in (1) be connected, the information after comprehensive treatment circuit (4) will be handled through long-range be connected to the alarm monitoring center or directly get into railway microcomputer chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110316691.2A CN102431577B (en) | 2011-10-19 | 2011-10-19 | Monitoring technology of eddy current sensor for gap of turnout gap detection column and detection block |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110316691.2A CN102431577B (en) | 2011-10-19 | 2011-10-19 | Monitoring technology of eddy current sensor for gap of turnout gap detection column and detection block |
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| CN102431577A true CN102431577A (en) | 2012-05-02 |
| CN102431577B CN102431577B (en) | 2014-08-06 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322961A (en) * | 2012-03-22 | 2013-09-25 | 平衡***有限公司 | Feeler for workpieces being machined |
| CN103465936A (en) * | 2013-09-18 | 2013-12-25 | 太原市京丰铁路电务器材制造有限公司 | Point machine gap inspection device |
| CN103884269A (en) * | 2014-04-04 | 2014-06-25 | 北京交通大学 | Turnout switch rail point closure deformation device based on electromagnetism eddy excitement collection |
| CN104142431A (en) * | 2014-07-28 | 2014-11-12 | 天津大学 | Eddy current conductivity measuring sensor |
| CN104276186A (en) * | 2013-07-01 | 2015-01-14 | 北京中研国辰测控技术有限公司 | Method for accurately monitoring closure distance between switch rail and base rail of turnout |
| CN104807583A (en) * | 2015-04-24 | 2015-07-29 | 南昌铁路通信信号厂有限公司 | Detection method and detection device for traction of point switch between turnout point rail and stock rail |
| CN105445364A (en) * | 2015-12-31 | 2016-03-30 | 爱德森（厦门）电子有限公司 | Special conformal array eddy current testing device and method for turnout |
| CN104197821B (en) * | 2014-09-11 | 2016-09-07 | 上海新海信通信息技术有限公司 | Point machine indication rod gap width monitoring system and current vortex sensor thereof |
| CN104197820B (en) * | 2014-09-11 | 2017-09-29 | 赵建明 | Point machine indication rod gap width on-line real time monitoring system |
| CN107764177A (en) * | 2017-09-13 | 2018-03-06 | 浙江大学 | The monitoring system and method for subway switch machine indication bar dynamic gap width |
| CN109254570A (en) * | 2018-09-27 | 2019-01-22 | 卡斯柯信号有限公司 | A kind of Intelligent closed-loop control system applied to high-speed rail signal equipment repair |
| CN110481593A (en) * | 2019-09-20 | 2019-11-22 | 中国铁路北京局集团有限公司唐山电务段 | A kind of track switch gap measuring device |
| CN111895901A (en) * | 2020-08-31 | 2020-11-06 | 爱德森（厦门）电子有限公司 | Method and system device for detecting gap between ferromagnetic and non-ferromagnetic metal plates |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322961A (en) * | 2012-03-22 | 2013-09-25 | 平衡***有限公司 | Feeler for workpieces being machined |
| CN103322961B (en) * | 2012-03-22 | 2018-05-25 | 平衡***有限公司 | For being just machined the detector of workpiece |
| CN104276186A (en) * | 2013-07-01 | 2015-01-14 | 北京中研国辰测控技术有限公司 | Method for accurately monitoring closure distance between switch rail and base rail of turnout |
| CN104276186B (en) * | 2013-07-01 | 2016-01-20 | 北京中研国辰测控技术有限公司 | The monitoring method of a kind of point tongue and the closely connected spacing of base rail |
| CN103465936A (en) * | 2013-09-18 | 2013-12-25 | 太原市京丰铁路电务器材制造有限公司 | Point machine gap inspection device |
| CN103884269A (en) * | 2014-04-04 | 2014-06-25 | 北京交通大学 | Turnout switch rail point closure deformation device based on electromagnetism eddy excitement collection |
| CN104142431A (en) * | 2014-07-28 | 2014-11-12 | 天津大学 | Eddy current conductivity measuring sensor |
| CN104197821B (en) * | 2014-09-11 | 2016-09-07 | 上海新海信通信息技术有限公司 | Point machine indication rod gap width monitoring system and current vortex sensor thereof |
| CN104197820B (en) * | 2014-09-11 | 2017-09-29 | 赵建明 | Point machine indication rod gap width on-line real time monitoring system |
| CN104807583B (en) * | 2015-04-24 | 2017-06-06 | 南昌铁路通信信号厂有限公司 | Goat tractive force detection method and detection means between point tongue and stock rail |
| CN104807583A (en) * | 2015-04-24 | 2015-07-29 | 南昌铁路通信信号厂有限公司 | Detection method and detection device for traction of point switch between turnout point rail and stock rail |
| CN105445364A (en) * | 2015-12-31 | 2016-03-30 | 爱德森（厦门）电子有限公司 | Special conformal array eddy current testing device and method for turnout |
| CN107764177A (en) * | 2017-09-13 | 2018-03-06 | 浙江大学 | The monitoring system and method for subway switch machine indication bar dynamic gap width |
| CN107764177B (en) * | 2017-09-13 | 2020-02-07 | 浙江大学 | System and method for monitoring dynamic gap width of subway switch machine indication rod |
| CN109254570A (en) * | 2018-09-27 | 2019-01-22 | 卡斯柯信号有限公司 | A kind of Intelligent closed-loop control system applied to high-speed rail signal equipment repair |
| CN109254570B (en) * | 2018-09-27 | 2024-06-04 | 卡斯柯信号有限公司 | Intelligent closed-loop card control system applied to high-speed rail signal equipment maintenance |
| CN110481593A (en) * | 2019-09-20 | 2019-11-22 | 中国铁路北京局集团有限公司唐山电务段 | A kind of track switch gap measuring device |
| CN111895901A (en) * | 2020-08-31 | 2020-11-06 | 爱德森（厦门）电子有限公司 | Method and system device for detecting gap between ferromagnetic and non-ferromagnetic metal plates |
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| CN102431577B (en) | 2014-08-06 |
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Effective date of registration: 20150331 Address after: 330052 Jiangxi city of Nanchang province Jinsha Road Theme Park pond 12 homes building 01 month Patentee after: Zhao Jianming Patentee after: CHINA RAILWAY SIGNAL & COMMUNICATION SHANGHAI ENGINEERING BUREAU GROUP CO., LTD. Address before: 330052 Jiangxi city of Nanchang province Jinsha Road Theme Park pond 12 homes building 01 month Patentee before: Zhao Jianming |