CN101428634B - Axle count sensor - Google Patents
Axle count sensor Download PDFInfo
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- CN101428634B CN101428634B CN2008101019739A CN200810101973A CN101428634B CN 101428634 B CN101428634 B CN 101428634B CN 2008101019739 A CN2008101019739 A CN 2008101019739A CN 200810101973 A CN200810101973 A CN 200810101973A CN 101428634 B CN101428634 B CN 101428634B
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- induction installation
- count sensor
- optical signal
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to an axle counting sensor which comprises a fiber optic transceiver, optical fiber and a sensing device, wherein, the fiber optic transceiver sends optical signals to the sensing device through the optical fiber, the make-break for the optical signals is performed by the sensing device, and the fiber optic transceiver receives the optical signals passing through the sensing device. The axle counting sensor has the advantages of high and low temperature resistance and simple structure.
Description
Technical field
The present invention relates to track axle count sensor, relate in particular to a kind of axle count sensor that adopts fiber optical transceiver.
Background technology
Wheel counting apparatus is in order to detecting train by certain axletree number of (axle-counting points) a bit on the railway, checking between two axle-counting points or the space situation in the track section, or judges the time of train by axle-counting points, from the equipment of dynamic correction train driving mileage etc.
Wherein axle count sensor is the infrastructure device of wheel counting apparatus, and its effect is that the axletree number conversion that locomotive, vehicle pass through is become electric impulse signal.The general at present electromagnetic type that adopts.Electromagnetic senser is made up of magnetic head, transmitter, receptor three parts.Magnetic head has one to send the both sides that coil and receiving coil are contained in rail respectively.Transmitter is presented the electric current of upper frequency to the transmission coil of magnetic head, produces alternating magnetic field around making it, and by the receiving coil of different medium loop chains such as air, rail, fastener to magnetic head, induces an alternating-current voltage/AC voltage.When axletree passed through magnetic head, the shielding action of wheel and the diffusion of wheel rim made loop chain change to the magnetic flow of the receiving coil of magnetic head, and induced voltage are significantly reduced.Receptor converts the induced voltage of this variation to the axletree electric impulse signal.
Adopt the rail sensor of above-mentioned structure at present, owing to used electric elements, its complex structure, for outdoor facility, its temperature tolerance and durability are restricted.
Summary of the invention
The axle count sensor that the purpose of this invention is to provide a kind of simple in structure, employing fiber optical transceiver that durability is strong.
A kind of axle count sensor, comprise fiber optical transceiver, optical fiber and induction installation, wherein said fiber optical transceiver sends optical signal to induction installation by optical fiber, and through the break-make of induction installation to optical signal, fiber optical transceiver receives through the optical signal after the induction installation by optical fiber.
Wherein, described induction installation is made of leakproof tank, described leakproof tank has the elasticity end face that can stressedly move down, wherein below the elasticity end face of leakproof tank, be provided with the elasticity end face and form the entity structure that one can move along with the elasticity end face, on corresponding fiber position, be used for transmitting optical signal and move the through hole that is used to interrupt optical signal along with entity structure having on the described entity structure.
Wherein said induction installation is provided with to be used for fixing and connects fiber optic fibre-optical splice.
Wherein said through hole is corresponding with the position of fibre-optical splice.
Fiber optical transceiver of the present invention can be for a plurality of, and cooresponding entity structure also is a plurality of.
Beneficial effect
There are not electric elements in the outdoor facility of axle count sensor of the present invention, thereby can high-and low-temperature resistance, is not afraid of dirtyly, and structure is very simple, effective, adopts very thin laser beam, only needs that very small deformation just can light pulse signal.Because the optical signal that fiber optical transceiver sends under the normal circumstances turns back to fiber optical transceiver through induction installation, fiber optical transceiver can be received optical signal.Have the situation fiber optical transceiver of car to can not receive optical signal, if fault, then fiber optical transceiver can not receive optical signal, meets the fault-safety principle principle.
Description of drawings
Fig. 1 is the structural representation of axle count sensor of the present invention;
Fig. 2 is the structural representation of the induction installation shown in Fig. 1 of the present invention;
Fig. 3 is the partial enlarged drawing of S part normal condition among Fig. 2 of the present invention;
Fig. 4 is the partial enlarged drawing of S part depressed state among Fig. 2 of the present invention.
The specific embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Axle count sensor of the present invention comprises indoor fiber optical transceiver, optical fiber and outdoor induction installation, as shown in Figure 1, fiber optical transceiver 1 is launched optical signal by optical fiber A1 to induction installation, and induction installation is installed in the both sides (a little more than guide rail) of track or is installed in the bottom of track.When not having locomotive to pass through, induction installation passes through by optical signal, fiber optical transceiver 1 can receive the issued light signal by optical fiber B1, when locomotive passed through, axletree rolled on the induction installation, and induction installation will hinder the transmission of optical signal, fiber optical transceiver 1 can not receive optical signal, the optical signal that passes through and interrupt just being converted into variation of axletree like this, thus fiber optical transceiver 1 just converts the optical signal that changes to light pulse signal, therefore can calculate the axletree number that locomotive, vehicle pass through.
The structure of induction installation as shown in Figure 2, in conjunction with Fig. 3, induction installation integral body is made of leak free square container P, there is a stationary plane M P internal tank top, itself and P form integral body, can not be out of shape, and can bear very big pressure.Above stationary plane M, be provided with the fibre-optical splice that is respectively applied for captive joint optical fiber A1 and B1, the position of fibre-optical splice is symmetrical, so that can be received by optical fiber B1 by the optical signal of optical fiber A1 emission.Q is the end face of P, is made up of elastic element, is under pressure to move down.Dotted line in Fig. 2 is divided into two parts of symmetry to the P internal tank, and these two its end face of part Q separate, but all has a T entity structure with Q end face formation one.One through hole R is arranged on this T entity structure, and as shown in Figure 3, the diameter of through hole R and position are according to the joint location of optical fiber A1, B1, thereby the optical signal that makes optical fiber A1 emission can be received by optical fiber B1 by after the through hole R.Wherein, the present invention adopts a pair of fiber optical transceiver and a pair of T entity structure, as shown in Figure 1, roll in the induction installation travel direction of differentiating locomotive along the sequencing of two entity structures of track alignment according to axletree, and have only when axletree and roll to second entity structure, when unclamping first entity structure, indoor equipment just can be counted the axletree that has just passed through, thereby has improved the accuracy of meter axle.
Being used for fixing of wherein illustrating in Fig. 3 connects fiber optic fibre-optical splice position, specifically is arranged on outside the leakproof tank P, and optical fiber A1, B1, A2, B2 are fixedly connected on the fibre-optical splice place, and fibre-optical splice is launched optical signal by the molten fibre in the leakproof tank again.The position of this fibre-optical splice can be set arbitrarily, designs according to concrete structure.
Under normal circumstances, the optical signal (dotted line among Fig. 3) of A1 transmission is transferred to B1 optical fiber through through hole R, is transferred in the indoor fiber optical transceiver 1 by B1 again, as Fig. 3, when car, because T and Q hold together, when Q is stressed when moving down, T also moves down, and wheel can be depressed T, and through hole R also descends thereupon, cause through hole R can not aim at the joint of optical fiber A1, B1, as Fig. 4, thereby hindered the transmission of optical signal, indoor fiber optical transceiver 1 just can not receive optical signal.Like this, vehicle axles break-make on the end face Q of airtight container P will cause the break-make of the optical signal that receives at fiber optical transceiver 1, thereby forms light pulse signal.
Induction installation in the axle count sensor of the present invention adopts leakproof tank, does not have electric elements, thereby can high-and low-temperature resistance, is not afraid of dirtyly, and structure is very simple, effective, meets the fault-safety principle principle.
Claims (4)
1. axle count sensor, it is characterized in that, comprise fiber optical transceiver, optical fiber and induction installation, wherein said fiber optical transceiver sends optical signal to induction installation by optical fiber, through the break-make of induction installation to optical signal, fiber optical transceiver receives through the light pulse signal after the induction installation by optical fiber.
2. axle count sensor as claimed in claim 1, it is characterized in that, described induction installation is made of leakproof tank, described leakproof tank has the elasticity end face that can stressedly move down, wherein below the elasticity end face of leakproof tank, be provided with the elasticity end face and form the entity structure that one can move along with the elasticity end face, on the position of correspondence emission optical signal, be used for transmitting optical signal and move the through hole that is used to interrupt optical signal along with entity structure being provided with on the described entity structure.
3. axle count sensor as claimed in claim 2 is characterized in that, described induction installation is provided with to be used for fixing and connects fiber optic fibre-optical splice.
4. axle count sensor as claimed in claim 2 is characterized in that, described fiber optical transceiver is a pair of, and the entity structure of described cooresponding induction installation also is a pair of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101019739A CN101428634B (en) | 2008-03-14 | 2008-03-14 | Axle count sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101019739A CN101428634B (en) | 2008-03-14 | 2008-03-14 | Axle count sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101428634A CN101428634A (en) | 2009-05-13 |
| CN101428634B true CN101428634B (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101019739A Expired - Fee Related CN101428634B (en) | 2008-03-14 | 2008-03-14 | Axle count sensor |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101797928B (en) * | 2010-02-11 | 2011-07-20 | 西南交通大学 | Rail transportation axle-counting device for packaging FBG based on semi-freedom |
| GB201201703D0 (en) * | 2012-02-01 | 2012-03-14 | Qinetiq Ltd | Detecting train separation |
| ES2506590B1 (en) * | 2013-04-11 | 2015-07-28 | Universidad De Alcalá | Sensor system and procedure to detect train axles using fiber optics and flight time cameras |
| CN104309644A (en) * | 2014-10-13 | 2015-01-28 | 深圳市科安达轨道交通技术有限公司 | Optical fiber grating sensor-based axle counter |
| CN110525479B (en) * | 2018-05-25 | 2021-10-22 | 比亚迪股份有限公司 | Mobile axle counting device, track traffic system and control system |
| CN115195813B (en) * | 2022-06-06 | 2023-06-30 | 北京全路通信信号研究设计院集团有限公司 | Laser axle counting method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5129606A (en) * | 1991-03-07 | 1992-07-14 | Jdr Systems Corporation | Railway wheel sensors |
| US5330136A (en) * | 1992-09-25 | 1994-07-19 | Union Switch & Signal Inc. | Railway coded track circuit apparatus and method utilizing fiber optic sensing |
| EP1582430A1 (en) * | 2004-03-29 | 2005-10-05 | The Hong Kong Polytechnic University | System and process for monitoring railway tracks |
| CN200981565Y (en) * | 2006-08-24 | 2007-11-28 | 刘金山 | Device for detecting railway orbit occupation condition |
-
2008
- 2008-03-14 CN CN2008101019739A patent/CN101428634B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5129606A (en) * | 1991-03-07 | 1992-07-14 | Jdr Systems Corporation | Railway wheel sensors |
| US5330136A (en) * | 1992-09-25 | 1994-07-19 | Union Switch & Signal Inc. | Railway coded track circuit apparatus and method utilizing fiber optic sensing |
| EP1582430A1 (en) * | 2004-03-29 | 2005-10-05 | The Hong Kong Polytechnic University | System and process for monitoring railway tracks |
| CN200981565Y (en) * | 2006-08-24 | 2007-11-28 | 刘金山 | Device for detecting railway orbit occupation condition |
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| CN101428634A (en) | 2009-05-13 |
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