CN102101484A - Novel unit structure for monitoring track axle - Google Patents
Novel unit structure for monitoring track axle Download PDFInfo
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- CN102101484A CN102101484A CN 201010607843 CN201010607843A CN102101484A CN 102101484 A CN102101484 A CN 102101484A CN 201010607843 CN201010607843 CN 201010607843 CN 201010607843 A CN201010607843 A CN 201010607843A CN 102101484 A CN102101484 A CN 102101484A
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- sensing unit
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- piezoelectric vibration
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Abstract
The invention discloses a novel unit structure for monitoring a track axle. The novel unit structure comprises at least one copolymer piezoelectric vibratory sensing unit and a processing unit, wherein the vibratory sensing unit is arranged on the back face 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 novel unit 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 kilometers) 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 block 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 1MHz 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.
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 interval (from the millisecond to the second) and the sampling precision (16 to 24) 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, and overlaps mutually the position at wall scroll rail and sleeper, at the sleeper head copolymer piezoelectric vibration unit is installed.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, and overlaps mutually the position at corresponding two rail and sleeper, at the sleeper head copolymer piezoelectric vibration unit is installed 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. 4 is one the enforcement scheme drawing is installed, and overlaps mutually the position at wall scroll rail and adjacent two sleepers, at the sleeper head two copolymer piezoelectric vibration unit is installed 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, and overlaps mutually the position at corresponding two rail and adjacent two sleepers, at the sleeper head four copolymer piezoelectric vibration unit is installed 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 that a copolymer piezoelectric vibration sensing unit is installed in the embodiment on the sleeper, tightening screw is fixed on sleeper with copolymer piezoelectric vibration sensing unit, sensing unit as shown in Figure 7 is close to sleeper, and total reaches stable by tightening screw and sleeper end face.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.Welded plate is used for using with rail welding or machine riveting.
Fig. 8 is that a copolymer piezoelectric vibration sensing unit utilizes rail clip to be fastened on embodiment on the sleeper, utilize as Fig. 1 or copolymer piezoelectric vibration sensing unit shown in Figure 7, sensing unit is placed between rail clip and the sleeper, sensing unit is fixed on the sleeper by rail clip by tightening screw.The copolymer piezoelectric can be collected the rail vibration signal and be sent to processing unit.
Fig. 9 is the installation embodiment that a copolymer piezoelectric vibration sensing unit adopts the mode of imbedding sleeper, utilize copolymer piezoelectric vibration sensing unit as Fig. 1, at first dig the groove more bigger, sensing unit is imbedded sleeper and used the embedding of PU glue than sensing unit at sleeper.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 1MHz 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 bottom, the vibration of real-time continuous monitoring present position track.
3. copolymer piezoelectric vibration sensing unit structure as claimed in claim 2 is characterized in that: time precision and interval (from the millisecond to the second) and the sampling precision (16 to 24) 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 bottom 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 bottom.
6. the monitoring means 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 201010607843 CN102101484A (en) | 2010-12-27 | 2010-12-27 | Novel unit structure for monitoring track axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010607843 CN102101484A (en) | 2010-12-27 | 2010-12-27 | Novel unit structure for monitoring track axle |
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| CN102101484A true CN102101484A (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010607843 Pending CN102101484A (en) | 2010-12-27 | 2010-12-27 | Novel unit structure for monitoring track axle |
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Cited By (2)
| 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 |
| 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3581084A (en) * | 1967-11-10 | 1971-05-25 | Sumitomo Electric Industries | Piezoelectric wheel-axle detector |
| DE2924190A1 (en) * | 1979-06-15 | 1980-12-18 | Siemens Ag | Monitoring presence, wt. etc. of railway vehicles - by using piezoelectric transducer mounted between rail foot and support block |
| FR2478348A1 (en) * | 1980-03-14 | 1981-09-18 | Automatisme Cie Gle | Traffic counting using analogue memory - uses analog memory with fast charge slow decay to control threshold level of signals to counter and prevent recording of overshoot |
| CN2032971U (en) * | 1987-08-07 | 1989-02-22 | 机械委员会第二一二研究所 | Passive en-block composition feeler unit for railway |
| US5129606A (en) * | 1991-03-07 | 1992-07-14 | Jdr Systems Corporation | Railway wheel sensors |
| US7364123B2 (en) * | 2004-12-06 | 2008-04-29 | General Electric Company | Self powered railway monitoring system |
-
2010
- 2010-12-27 CN CN 201010607843 patent/CN102101484A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3581084A (en) * | 1967-11-10 | 1971-05-25 | Sumitomo Electric Industries | Piezoelectric wheel-axle detector |
| DE2924190A1 (en) * | 1979-06-15 | 1980-12-18 | Siemens Ag | Monitoring presence, wt. etc. of railway vehicles - by using piezoelectric transducer mounted between rail foot and support block |
| FR2478348A1 (en) * | 1980-03-14 | 1981-09-18 | Automatisme Cie Gle | Traffic counting using analogue memory - uses analog memory with fast charge slow decay to control threshold level of signals to counter and prevent recording of overshoot |
| CN2032971U (en) * | 1987-08-07 | 1989-02-22 | 机械委员会第二一二研究所 | Passive en-block composition feeler unit for railway |
| US5129606A (en) * | 1991-03-07 | 1992-07-14 | Jdr Systems Corporation | Railway wheel sensors |
| US7364123B2 (en) * | 2004-12-06 | 2008-04-29 | General Electric Company | Self powered railway monitoring system |
Cited By (2)
| 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 |
| 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 |
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Application publication date: 20110622 |