CN102101483A - Sensor structure for monitoring track axle - Google Patents
Sensor structure for monitoring track axle Download PDFInfo
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- CN102101483A CN102101483A CN 201010607833 CN201010607833A CN102101483A CN 102101483 A CN102101483 A CN 102101483A CN 201010607833 CN201010607833 CN 201010607833 CN 201010607833 A CN201010607833 A CN 201010607833A CN 102101483 A CN102101483 A CN 102101483A
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Abstract
The invention discloses a sensor structure for monitoring a track axle. The sensor structure comprises at least one copolymer piezoelectric vibratory sensing unit and a processing unit, wherein the vibratory sensing unit is arranged on the waist part of a track in a bonding, welding or mechanical fastening way; the sensing unit obtains vibration of between 10 Hz and 1 GHz of the track and is connected to the processing unit through a passive cable (such as super high-toughness high-intensity polyethylene with the characteristics of waterproofness and low capacitance); one processing unit can be connected with a plurality of sensing units; each sensing unit acquires a track vibration signal in real time; and the processing unit is used for acquiring and preprocessing signals and transmitting preprocessed data in a wireless or wired way. The sensor structure has configuration and programming flexibility in the aspects of sampling period, sampling accuracy and transmission data time interval, high environment adaptability and low system cost, is easy and convenient to install and operate, and can support intensive (more than 10 ones per kilometer) installation of a track along a length distance (more than 1,000 kilometers).
Description
[technical field]
The present invention relates to rail transportation axle-counting instrument and meter and sensor and circuit design field, be specifically related to a kind of low cost, can take and idle method of real-time thereby cover full track road traffic network at the axletree monitoring means of track dense layout along the line.
[background technology]
Railway transportation and high speed railway passenger traffic are the lifeblood of national economy, and urban track traffic (be called for short city rail) is for alleviating urban traffic blocking, improving city atmospheric environment and have crucial meaning.
The signal system of railway transportation and city rail is the visual plant that transportation safety is produced, and whether require to detect in real time corresponding circuit or section has train occupation or go out clearly.Railway and city rail signal system adopt track circuit, electromagnetism meter axle and optical fiber transducer meter axle at present.
Patent of invention CN86103414 discloses a kind of track circuit, the advantage that it is specific such as simple in structure, with low cost etc.But the shortcoming that also has some self can't overcome, is commonly called as " pressing not dead " and the mutual short circuit of two tracks as track circuit shunting badness, and output takies red signal, occurs " red band ".
Utility model patent CN2337030 discloses a kind of electromagnetism meter axle technology, and this technology is to be core with electromagnetic induction sensor and computing machine, is aided with external device, and by the train number of axle that statistics is passed through, whether detection line has car.But, also there is following problem at present:
1) owing to adopt electromagnetic induction principle, be subject to electromagnetic interference, as thunder and lightning, even the spade of maintenance man all can produce interference;
2) device structure complexity, the cost height;
3) the fault rate height of the electromagnetic induction axle counting system of China, reliable type is poor.Core technology is monopolized by offshore company, and the main circuit plate need send external maintenance, and the cycle is long, the expense height.
Patent application 200910252831.7 discloses a kind of optical fiber grating sensing train meter axle technology, and this technology has characteristics such as accuracy rate height, good stability, protection against the tide and anti-electromagnetic interference, therefore is widely used in the engineering monitoring.But, there is following problem at present:
1) cost height, the sensor of the optical instrumentation of core and detection track strain signal costs an arm and a leg, and is unfavorable for that the big Local Area Network of track traffic detects the monitoring layout.
2) a little less than the optical fiber anti-vibration ability, be not enough in the long along the line Distance Transmission of track, optical device is not suitable for installing nearby along the line at track to vibration sensing simultaneously.
[summary of the invention]
Main purpose of the present invention solves the problems of the prior art exactly, a kind of real-time track meter shaft monitoring sensor construction based on piezoelectric vibration detection characteristic is provided, have low cost, high reliability, low misuse rate, the easy characteristic of installation and maintenance, suitable track is dense distribution on a large scale along the line.
For achieving the above object, the invention provides a kind of monitoring means structure of real-time monitoring track vibration, comprise at least one copolymer piezoelectric vibration sensing unit, a processing unit.Described copolymer piezoelectric vibration sensing unit and processing unit are interconnected, copolymer piezoelectric vibration sensing unit obtains 10Hz in real time to 1GHz track vibration signal, be connected to processing unit by passive cable, processing unit finish pretreatment such as signal sampling digitalisation and will handle after data send by wireless or wired WAN communication network again.
Copolymer piezoelectric vibration sensing unit can be installed in the track bottom by gluing, welding or machine riveting mode, the vibration of real-time continuous monitoring present position track.Time precision and the interval and the sampling precision etc. of real-time continuous monitoring all can be provided with by the user.
The occupation mode of copolymer piezoelectric vibration sensing unit is one or more sensing units to be installed at monorail or two-orbit bottom.The system that this sensing unit is formed can monitor the monitoring of track vibration in real time, has lower cost, and zone, highly dense layout are easy to installation and maintenance greatly.
The detection principle of copolymer piezoelectric vibration sensing unit is:
Piezoelectric is a kind of material that can realize that after special processing kinetic energy and electric energy exchange.Some polymer materials, for example copolymer p VDF makes this characteristic that large increase arranged.Piezoelectric produces electric charge when being subjected to physical shock or vibration.At atomic layer, putting in order of dipole (hydrogen-fluorine couple) upset, and attempts to make it to recover original state.The result that this dipole is upset is exactly that an electron current forms.Just as the water in the sponge, when you pushed a wet sponge, water can flow out from sponge, and when you unclamped, water is sucked back again to be gone, and it is quite similar that this changes sensing unit with piezoelectric stress.When stress is applied on the sensing unit, has just produced electric charge (voltage), and when removing load, will produce the signal of an opposite polarity.The voltage that it produces can be quite high, but the electric current that sensing unit produces is smaller.
The detection principle of copolymer piezoelectric vibration sensing unit is exactly so, when the track train axletree does not pass through the cooresponding position of vibration sensor, the vibration intensity that sensor is experienced a little less than.During train axle process vibration sensor top, the vibration intensity that sensor is experienced is stronger, carries out the vehicle axletree with this and detects and count, and judges orbit occupancy and idle condition simultaneously.
The invention has the beneficial effects as follows:
The present invention adopts a kind of copolymer piezoelectric vibration sensing unit and processing unit, finish the real-time monitoring of track axletree counting and orbit occupancy and idle condition, cost is low, good stability, installation and maintenance are easy, the long along the line distance of suitable track, on a large scale, the real-time monitoring point of foundation of highly dense intensity, thereby can help track resources to make full use of.
[specific embodiment and description of drawings]
The application's feature and advantage will be carried out supplemental instruction by embodiment.
Fig. 1 is the scheme drawing of copolymer piezoelectric vibration sensing unit, and the central core of this sensing unit is made of the copolymer piezoelectric, and both sides are Polymer packed layer and coat of metal successively.
Fig. 2 is one the enforcement scheme drawing is installed that to adjacent two positions that sleeper is equidistant, the waist of rail is installed a copolymer piezoelectric vibration unit at the wall scroll rail.Copolymer piezoelectric vibration unit is by the cable connection processing unit, and the data after processing unit will be handled mail to monitoring center by wireless GPRS/3G.
Fig. 3 is one the enforcement scheme drawing is installed that to adjacent two positions that sleeper is equidistant, the waist of rail is installed a copolymer piezoelectric vibration unit respectively on corresponding two rail.Copolymer piezoelectric vibration unit is by the cable connection processing unit, and the data after processing unit will be handled mail to monitoring center by wireless GPRS/3G.
Fig. 4 is one the enforcement scheme drawing is installed that in two positions of wall scroll rail to adjacent two sleeper trisections, the waist of rail is installed two copolymer piezoelectric vibration unit respectively.Copolymer piezoelectric vibration unit is by the cable connection processing unit, and the data after processing unit will be handled mail to monitoring center by wireless GPRS/3G.
Fig. 5 is one the enforcement scheme drawing is installed that in two positions of corresponding two rail to adjacent two sleeper trisections, the waist of rail is installed four copolymer piezoelectric vibration unit respectively.Copolymer piezoelectric vibration unit is by the cable connection processing unit, and the data after processing unit will be handled mail to monitoring center by wireless GPRS/3G.
Fig. 6 is the embodiment that a copolymer piezoelectric vibration sensing unit is installed in the rail web of the rail, adopt copolymer piezoelectric vibration sensing unit shown in Figure 7, at first, copolymer piezoelectric vibration sensing unit is fixed on web of the rail place with the fix screw nut reaches stabilized conditions in the correspondence position punching of welded plate, sensing unit welded plate and the web of the rail.The copolymer piezoelectric can be collected the rail vibration signal and be sent to processing unit.
Fig. 7 is the scheme drawing of another kind of copolymer piezoelectric vibration sensing unit, and the central core of this sensing unit is made of the copolymer piezoelectric, is welded plate, Polymer packed layer, copolymer piezoelectric, Polymer packed layer and coat of metal from top to bottom successively.When being used for being connected with rail welding, welded plate uses.
Fig. 8 is that a copolymer piezoelectric vibration sensing unit adopts welding manner to be installed in the embodiment of the rail web of the rail, utilizes the copolymer piezoelectric vibration sensing unit as Fig. 7, and the sensing unit welded plate is connected with the rail waist by welding manner.The copolymer piezoelectric can be collected the rail vibration signal and be sent to processing unit.
Fig. 9 is that a copolymer piezoelectric vibration sensing unit adopts cementation method to be installed in the embodiment of the rail web of the rail, utilizes the copolymer piezoelectric vibration sensing unit as Fig. 1 or Fig. 7, sensing unit is connected to the rail waist with PU glue connects.The copolymer piezoelectric can be collected the rail vibration signal and be sent to processing unit.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. a monitoring means structure of monitoring the rail vehicle axis information in real time is characterized in that: comprise at least one copolymer piezoelectric vibration sensing unit, a processing unit.Described copolymer piezoelectric vibration sensing unit and processing unit are interconnected, copolymer piezoelectric vibration sensing unit obtains 10Hz in real time to 1GHz track vibration signal, by passive cable, be connected to processing unit such as superpower toughness high density polyethylene (HDPE) (HDPE), waterproof, low electric capacity (as 89pF/m), processing unit finish pretreatment such as signal sampling digitalisation and will handle after data send by wireless or wired WAN communication network again.
2. copolymer piezoelectric vibration sensing unit structure as claimed in claim 1 is characterized in that: can be installed in the track waist, the vibration of real-time continuous monitoring present position track.
3. copolymer piezoelectric vibration sensors structure as claimed in claim 2 is characterized in that: time precision and the interval and the sampling precision etc. of real-time continuous monitoring all can be provided with by the user.
4. as claim 2 and 3 described copolymer piezoelectric vibration sensing unit structures, it is characterized in that: the copolymer piezoelectric transducer can be installed to the track waist in the mode of gluing, welding or machine riveting.
5. copolymer piezoelectric vibration sensing unit structure as claimed in claim 1 is characterized in that: can one or more sensing units be installed at monorail or two-orbit waist.
6. the monitoring sensor structure of real-time monitoring track vibration as claimed in claim 1 is characterized in that: have lower cost, zone, highly dense layout are easy to installation and maintenance greatly.
7. copolymer piezoelectric vibration sensing unit structure as claimed in claim 1, it is characterized in that: piezoelectric is a sheet form, and the thin slice outside has protective cover, protective cover can adopt metallic forms or organic matter form.The one or both sides of piezoelectric sheet have metallic gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010607833 CN102101483A (en) | 2010-12-27 | 2010-12-27 | Sensor structure for monitoring track axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010607833 CN102101483A (en) | 2010-12-27 | 2010-12-27 | Sensor structure for monitoring track axle |
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| CN102101483A true CN102101483A (en) | 2011-06-22 |
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| CN 201010607833 Pending CN102101483A (en) | 2010-12-27 | 2010-12-27 | Sensor structure for monitoring track axle |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120461A (en) * | 2010-12-27 | 2011-07-13 | 深圳思量微系统有限公司 | Unit structure used for monitoring axle of track car |
| CN102530028A (en) * | 2012-01-19 | 2012-07-04 | 重庆安谐新能源技术有限公司 | Railway track real-time monitoring system and data processing method thereof |
| CN103661488A (en) * | 2013-12-18 | 2014-03-26 | 苏州瑞尔维电子科技有限公司 | System for monitoring rail axle information |
| CN105372080A (en) * | 2015-12-22 | 2016-03-02 | 成都市新筑路桥机械股份有限公司 | Tramcar, and embedded track coupling dynamics test device and method thereof |
| CN105667543A (en) * | 2014-12-03 | 2016-06-15 | 阿尔斯通运输科技公司 | Method for discriminating presence of railway vehicle on block, method for calculating safety interval and associated device |
| CN107748906A (en) * | 2017-11-22 | 2018-03-02 | 中国铁道科学研究院金属及化学研究所 | Locomotive wheel ground identifying system and method |
| CN109129408A (en) * | 2018-10-25 | 2019-01-04 | 徐州木牛流马机器人科技有限公司 | A kind of track travel device of machine |
| CN109291958A (en) * | 2018-07-24 | 2019-02-01 | 浙江众合科技股份有限公司 | Means of defence when going out clear based on the meter shaft failure maloperation mistake that train counts |
| CN109398420A (en) * | 2018-09-27 | 2019-03-01 | 中铁二院工程集团有限责任公司 | Suspension monorail location recognition method and identification sensor mounting structure |
| CN110626385A (en) * | 2019-10-08 | 2019-12-31 | 宁波大桔科技有限公司 | Induction steel plate applied to single-rail axle counting detection |
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| CN2874423Y (en) * | 2006-01-25 | 2007-02-28 | 欧进萍 | PVDF piezoelectric film glue base package strain meter shielded by metal shield layer |
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| CN201138209Y (en) * | 2007-11-23 | 2008-10-22 | 成都货安计量技术中心 | Piezoelectric membrane track sensor |
| CN101311681A (en) * | 2007-07-10 | 2008-11-26 | 方阵（北京）科技有限公司 | Track traffic axle count sensor |
| WO2009030657A1 (en) * | 2007-09-03 | 2009-03-12 | Siemens Aktiengesellschaft | Method for counting the axles of a rail vehicle |
| CN201298564Y (en) * | 2008-10-27 | 2009-08-26 | 安徽新亚特电缆集团有限公司 | Cable linear macromolecular sensitive piezoelectric sensor |
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| CN2874423Y (en) * | 2006-01-25 | 2007-02-28 | 欧进萍 | PVDF piezoelectric film glue base package strain meter shielded by metal shield layer |
| CN2874424Y (en) * | 2006-01-25 | 2007-02-28 | 欧进萍 | PVDF piezoelectric film glue base package strain meter |
| CN101311681A (en) * | 2007-07-10 | 2008-11-26 | 方阵（北京）科技有限公司 | Track traffic axle count sensor |
| WO2009030657A1 (en) * | 2007-09-03 | 2009-03-12 | Siemens Aktiengesellschaft | Method for counting the axles of a rail vehicle |
| CN201138209Y (en) * | 2007-11-23 | 2008-10-22 | 成都货安计量技术中心 | Piezoelectric membrane track sensor |
| CN201298564Y (en) * | 2008-10-27 | 2009-08-26 | 安徽新亚特电缆集团有限公司 | Cable linear macromolecular sensitive piezoelectric sensor |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120461A (en) * | 2010-12-27 | 2011-07-13 | 深圳思量微系统有限公司 | Unit structure used for monitoring axle of track car |
| CN102530028A (en) * | 2012-01-19 | 2012-07-04 | 重庆安谐新能源技术有限公司 | Railway track real-time monitoring system and data processing method thereof |
| CN102530028B (en) * | 2012-01-19 | 2014-07-30 | 重庆安谐新能源技术有限公司 | Railway track real-time monitoring system and data processing method thereof |
| CN103661488A (en) * | 2013-12-18 | 2014-03-26 | 苏州瑞尔维电子科技有限公司 | System for monitoring rail axle information |
| CN105667543A (en) * | 2014-12-03 | 2016-06-15 | 阿尔斯通运输科技公司 | Method for discriminating presence of railway vehicle on block, method for calculating safety interval and associated device |
| CN105372080A (en) * | 2015-12-22 | 2016-03-02 | 成都市新筑路桥机械股份有限公司 | Tramcar, and embedded track coupling dynamics test device and method thereof |
| CN107748906A (en) * | 2017-11-22 | 2018-03-02 | 中国铁道科学研究院金属及化学研究所 | Locomotive wheel ground identifying system and method |
| CN107748906B (en) * | 2017-11-22 | 2024-02-02 | 中国铁道科学研究院金属及化学研究所 | Locomotive wheel ground surface identification system and method |
| CN109291958A (en) * | 2018-07-24 | 2019-02-01 | 浙江众合科技股份有限公司 | Means of defence when going out clear based on the meter shaft failure maloperation mistake that train counts |
| CN109291958B (en) * | 2018-07-24 | 2020-08-18 | 浙江众合科技股份有限公司 | Protection method for counting shaft fault misoperation error clearing based on train counting |
| CN109398420A (en) * | 2018-09-27 | 2019-03-01 | 中铁二院工程集团有限责任公司 | Suspension monorail location recognition method and identification sensor mounting structure |
| CN109129408A (en) * | 2018-10-25 | 2019-01-04 | 徐州木牛流马机器人科技有限公司 | A kind of track travel device of machine |
| CN110626385A (en) * | 2019-10-08 | 2019-12-31 | 宁波大桔科技有限公司 | Induction steel plate applied to single-rail axle counting detection |
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Application publication date: 20110622 |