CN101934745A - Position sensor for electrified railway vehicles - Google Patents
Position sensor for electrified railway vehicles Download PDFInfo
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- CN101934745A CN101934745A CN 201010295433 CN201010295433A CN101934745A CN 101934745 A CN101934745 A CN 101934745A CN 201010295433 CN201010295433 CN 201010295433 CN 201010295433 A CN201010295433 A CN 201010295433A CN 101934745 A CN101934745 A CN 101934745A
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Abstract
The invention relates to a position sensor for electrified railway vehicles. The position sensor consists of a current transformer and three branches, wherein the current transformer has a core-perforating structure; and two leading-out terminals of a winding are connected with the three branches, a first branch is formed by connecting n diodes in series according to the sequence of a cathode and then an anode, a second branch is formed by connecting n diodes in series according to the sequence of the cathode and then the anode, the diodes of the second branch are in inverse-parallel connection with those of the first branch, and a third branch is formed by connecting a resistor with an optical fiber launching head in series. When locomotives drive, current flows through a contact net, and after monitoring the current, the sensor sends an optical signal; the optical signal is transmitted to a controller of a ground automatic neutral-section passing device through an optical fiber and is converted into an electric signal in the controller, namely a position signal of the locomotives. The position sensor solves the problems of low detection accuracy, unsuitability for mixed-running routes of various locomotives, unsuitability for high speed and extremely-low speed and unsuitability for electrified railways of alternating-current power supply in the conventional position sensor for the electrified vehicles, and positions the positions of pantograph type current collectors of the locomotives accurately.
Description
Technical field
The invention belongs to the sensor detecting field, relate in particular to a kind of sensor device that the position of electric locomotive is monitored.
Background technology
In the electrified railway, electric locomotive is adopted single phase power supply.In order to reduce the overbalance influence of railway single-phase load to three-phase electrical power system, the traction net adopts the method for segmentation phase-splitting power supply, in whole traction net, takes the A-B-C-A-B-C three-phase pattern of power supply by turns.One section power supply dead band is arranged between the adjacent two-phase, be called electric phase-separating section, also be called the neutral zone, general every 25km ~ 30km just has a phase-separating section.
When electric locomotive when the phase-separating section, according to " break " prompting of sign of ground, the driver manually moves back level, closes auxiliary unit, the operation of disconnection main circuit breaker of railway engine; Locomotive " closes " prompting that identifies through behind the phase-separating section according to ground, and the driver recovers aforesaid operations item by item.This is a kind of phase-splitting of cutting off the power supply, and in the neutral zone, locomotive outage back relies on inertia to continue to slide, owing to there is not tractive force, train is under the influence of windage and wheel-rail friction resistance, and speed can reduce, and makes a very bad impression in high speed train and heavy haul train.On the other hand, this operation has increased driver's labour intensity, in case the driver fails in time disconnected lock, the pantograph band then can take place to be carried and rushes phase-splitting, can cause the fault of burning pantograph, burning contact system, serious in addition take place traction trip train operation accidents such as power failure.Therefore, too become the development tendency that phase-splitting is crossed in electrified railway automatically mutually.
Automatically cross the M/C that phase-splitting does not need the driver.Use at present that more automatic to cross phase-splitting be the vehicle-mounted automatic phase-splitting of crossing, its relies on the automatic operation of coke oven controller to replace driver's M/C.When locomotive entered phase-separating section, the vehicle location sensor provided position signal, and the Train Control device detects and move back level behind the position signal automatically, close auxiliary unit, disconnect the operation of main circuit breaker of railway engine; After locomotive rolled phase-separating section away from, the vehicle location sensor provided position signal, and the Train Control device recovers aforesaid operations after detecting position signal item by item.This mode can reduce driver operation fatigue, increases system reliability.Yet vehicle-mounted automatic phase-splitting excessively also is a kind of phase-splitting of cutting off the power supply, and in phase-separating section, the locomotive outage is slided, and tractive force and train speed still can be affected.
Along with the development of China Railway High-speed and heavy haul railway, require the train also can charging operation in phase-separating section, could can not influence car speed for locomotive provides lasting tractive force like this.This mode of phase-splitting excessively is called the charged phase-splitting excessively of locomotive, and its relies on ground automatic neutral-section passing device to realize.The main actuating mechanism of ground automatic neutral-section passing device is two groups of switches, and these two groups of switches couple together the neutral zone respectively with the both sides feeding section.Do not have locomotive through out-of-date, switch disconnects, and the neutral zone does not have power supply; When locomotive entered phase-separating section, by the closed two groups of switches of priority, both sides feeding section timesharing was powered to the neutral zone, makes electric locomotive not disconnect line circuit breaker in the operational process of neutral zone, and power-off time is very short, can not lose tractive force.
Realize the operations such as switch closure, switching, disconnection of ground automatic neutral-section passing device, it is that locomotive position signal is accurately arranged that first of system requires.If locomotive location information accurately not, the switch motion sequential will be disorderly, cause the neutral zone can not supply regular power, the motorcycle pantograph band carries and rushes phase-splitting, serious even cause traction net phase fault, has influence on the safety and the driving order of traction system.
Existing locomotive position detection mode mainly is to adopt the ATP acknowledge signal of magnet steel sensor signal or Train Control device.The problem that Magnetic Sensor exists is a loss of excitation, and using for a long time to influence accuracy of detection; Magnetic Sensor can only adapt to the speed of a motor vehicle in 5 ~ 250km/h scope, can not be used for the extremely low speed of a motor vehicle and high speed railway.The ATP transponder signal is from vehicle-borne Train Control device, and the vehicle-borne system of ground automatic neutral-section passing device right and wrong, the situation of train control system and non-train control system switching signal is not suitable for multiple locomotive and mixes the circuit that runs.
In the patent No. is 92234278.4, name is called in the patent of stringing electrical locomotive position transduser and discloses a kind of electric locomotive position transduser of being made up of electromagnet, Hall element and amplifying circuit, this invention is applicable to 250V or the galvanic situation of 550V, can not be applicable to the electrified railway of 27.5kV Alternating Current Power Supply.
Summary of the invention
Technical matters to be solved by this invention is: existing electrified vehicle location sensor exist accuracy of detection low, be not suitable for multiple locomotive and mix the circuit that runs, be not suitable at a high speed and utmost point slow-moving vehicle, be not suitable for the electrified railway of Alternating Current Power Supply.The invention provides a kind of electrified vehicle location sensor, the position of accurate in locating motorcycle pantograph, and can solve the problems referred to above.
Technical scheme of the present invention is: adopt a current transformer that the alternating current in the contact system is monitored, when flowing through electric current in the contact system, Current Transformer Secondary side output current signal, inverse parallel circuit clamping by series diode obtains voltage signal, by the optical fiber emitting head voltage signal is converted to optical signal again, this optical signal is exactly the locomotive position signal, is transferred to by optical cable in the controller of ground automatic neutral-section passing device.
Two exits of Current Transformer Secondary side winding (W) are connected with first, second, third branch road.
The first branch road diode in series quantity and the second branch road diode in series quantity are n, n 〉=2, and all diodes are selected same model for use.
First branch road is the one one diode, the one or two diode ... the series arm of the one N-1 diode, a N diode.
The negative electrode of the one one diode is connected with the anode of the one or two diode, the negative electrode of the one or two diode ... be connected with the anode of a N-1 diode, the negative electrode of a N-1 diode is connected with the anode of a N diode.
Second branch road is the 21 diode, the two or two diode ... the series arm of the 2nd N-1 diode, the 2nd N diode.
The anode of the 21 diode is connected with the negative electrode of the two or two diode, the anode of the two or two diode ... be connected with the negative electrode of the 2nd N-1 diode, the anode of the 2nd N-1 diode is connected with the negative electrode of the 2nd N diode.
The 3rd branch road is the branch road that an end of end of resistance and optical fiber emitting head is connected to form.
One end of the winding of current transformer is connected with the negative electrode of the 21 diode of the anode of the one one diode of first branch road, second branch road and the other end of resistance.
The anode of the negative electrode of the other end of the winding of current transformer and first branch road the one N diode, the 2nd N diode of second branch road and the other end of optical fiber emitting head are connected.
The present invention compares the beneficial effect that is had with prior art:
1) because what gather is the variation of electric current, rather than the numerical value of the electric current of gathering, therefore allow the iron core of current transformer to be operated in saturation conditions, the signal by optical fiber output is a dutycycle less than 50% impulse singla.The benefit of doing like this is the iron core that does not need large volume, and the current transformer equipment volume is little, cost is low.
2) utilize the characteristic of diode clamp, avoid the fluctuation of Current Transformer Secondary lateral load, when monitored electric current changed to 1000A at 0.5A, the voltage undulation scope of diode clamp only was 0.5V.Therefore electrified vehicle location sensor can be monitored the locomotive position of all existing operations.
3) antijamming capability is strong.Current Transformer Secondary side signal is a current source signal, and signal transmission path is an Optical Fiber Transmission, and the two all can not be subjected to the influence of electromagnetic interference.
4) use HFBR that the high pressure of contact system and the low pressure of controller are isolated, need not that current transformer is done special insulation and handle, isolation effect is good.
Description of drawings
Fig. 1 is the system schematic of ground automatic neutral-section passing device work.
Fig. 2 is the schematic circuit diagram of electrified vehicle location sensor.
Among the figure, first branch road 1; Second branch road 2; The 3rd branch road 3; Current transformer 4.
The specific embodiment
The embodiment that invention will be further ex-plained with reference to the appended drawings.
The present invention monitors the contact system electric current by operation of current transformers principle, diode clamp characteristic, the position of accurate in locating motorcycle pantograph.
Fig. 1 is the system schematic of ground automatic neutral-section passing device work, N1 and N2 are respectively the boundary of neutral zone and feeding section, it between N1 and the N2 neutral zone (non-electricity zone), that is not having electric section in the contact system fully, left catenary 5, left dropper 6, left contact wire 7 constitute the contact system of left side, neutral zones feeding section.Right catenary 8, right dropper 9, right contact wire 10 constitute the contact system of right side, neutral zone feeding section.Middle catenary 11, middle dropper 12, middle contact wire 13 constitute the contact system of neutral zones.
The switch 14 of ground, left side automatic neutral-section passing device, the switch 15 of right ground automatic neutral-section passing device.One end of the switch 14 of ground, left side automatic neutral-section passing device is connected with left contact system 5 by high-tension cable 16; One end of the switch 15 of right ground automatic neutral-section passing device is connected with right contact system 8 by high-tension cable 17.High-tension cable 18 is used to connect the other end of the switch 14,15 of neutral zone contact system 11,13 and ground, left and right sides automatic neutral-section passing device.Electric locomotive is 19, and pantograph is 20, and rail is 21.CG1, CG2 are position transduser of the present invention, and Fig. 2 is the circuit diagram of electrified vehicle location sensor.
Current transformer 4 adopts the core-theaded type structure, and iron core MC adopts the structure of open-type or closed type, and the material of iron core MC is silicon steel, crystallite or permalloy.
Two exits of the secondary side winding W of current transformer 4 are connected with first, second, third branch road (1,2,3).
The negative electrode of the one one diode D11 is connected with the anode of the one or two diode D12, the negative electrode of the one or two diode D12 ... with a N-1 diode D1(n-1) anode be connected a N-1 diode D1(n-1) negative electrode be connected with the anode of a N diode D1n.
Second branch road 2 is the 21 diode D21, the two or two diode D22 ... the 2nd N-1 diode D2(n-1), the series arm of the 2nd N diode D2n.
The anode of the 21 diode D21 is connected with the negative electrode of the two or two diode D22, the anode of the two or two diode D22 ... with the 2nd N-1 diode D2(n-1) negative electrode be connected the 2nd N-1 diode D2(n-1) anode be connected with the negative electrode of the 2nd N diode D2n.
The branch road that the 3rd branch road 3 is connected to form for the end of an end of resistance R and optical fiber emitting head HFBR.
The negative electrode of the one one diode D11 anode of the end of the winding W of current transformer 4 and first branch road 1, the 21 diode D421 of second branch road 2 and the other end of resistance R are connected.
The anode of the negative electrode of the other end of the winding W of current transformer 4 and a n diode D1n of first branch road 1, the 2nd n diode D2n of second branch road 2 and the other end of optical fiber emitting head HFBR are connected.
The diode of the diode of first branch road 1 and second branch road 2 is all selected same model for use.The quantity of two-way diode is n, n 〉=2, and the quantity of diode does not have ceiling restriction from the principle, and operating needs is promptly satisfied in general n=3 or 4, and n=1 is nonsensical.
Principle of work of the present invention is: when locomotive crosses, there is electric current to flow through in this place's contact system, also can flow through electric current in the current carrying catenary, this electric current is an alternating current, pass after the current transformer 4 of current carrying catenary monitors electric current, flow through a little electric current among the secondary side winding W, the electric current of positive and negative half cycle flows through first branch road 1 and second branch road 2 respectively, the diode two ends produce clamping voltage, this voltage is added on the 3rd branch road 3, by the resistance R current limliting, optical fiber emitting head HFBR flows through electric current, thus the output optical signal.Transfer to controller through optical cable, after process opto-electronic conversion on the controller, know the electric signal of locomotive position.
When motorcycle pantograph is between sensor CG1 of the present invention and N1, CG1 outgoing position signal high level, otherwise output low level; When motorcycle pantograph is between CG2 and N2, CG2 outgoing position signal, otherwise output low level.
When the outside of locomotive at CG1 and CG2 two ends, CG1 and CG2 be output low level, and the switch 14 and 15 of left and right ground automatic neutral-section passing device all disconnects, and this is the initial condition of ground automatic neutral-section passing device.Operate to example from left to right with locomotive in Fig. 1, when pantograph process CG1, CG1 exports high level, after controller receives position signal, sends the switch 14 of the closed left ground of instruction automatic neutral-section passing device, and the neutral zone is powered by the left side feeding section.After locomotive enters the neutral zone through N1 to overtake, the position signal of CG1 disappears, controller sends the switch 14 that instruction disconnects left and right ground automatic neutral-section passing device, 3.3 the concrete time numerical value of ~ 20ms(need be determined according to the voltage-phase of left and right two-phase) switch 15 of closed left and right ground, back automatic neutral-section passing device, the neutral zone changes by the right side feeding section and powers.Locomotive rolls the neutral zone away to overtake, enters between N2 and the CG2, then CG2 exports the high level position signal, when locomotive sails to the CG2 right side, and the CG2 output low level, controller receives after the CG2 signal arrives low process from low to high again, sends instruction cut-off switch 15, and initial condition is got back to by system.
Claims (2)
1. electrified railway vehicle location sensor is characterized in that:
Two exits of secondary side winding (W) of current transformer (4) are connected with first, second, third branch road (1,2,3);
The number of diodes of the number of diodes of first branch road (1) and second branch road (2) is n, n 〉=2, general n=3 or 4;
First branch road (1) is the one one diode (D11), the one or two diode (D12) ... the one N-1 diode (D1(n-1)), the series arm of a N diode (D1n);
The negative electrode of the one one diode (D11) is connected with the anode of the one or two diode (D12), the negative electrode of the one or two diode (D12) ... with a N-1 diode (D1(n-1)) anode be connected a N-1 diode (D1(n-1)) negative electrode be connected with the anode of a N diode (D1n);
Second branch road (2) is the 21 diode (D21), the two or two diode (D22) ... the 2nd N-1 diode (D2(n-1)), the series arm of the 2nd N diode (D2n);
The anode of the 21 diode (D21) is connected with the negative electrode of the two or two diode (D22), the anode of the two or two diode (D22) ... with the 2nd N-1 diode (D2(n-1)) negative electrode be connected the 2nd N-1 diode (D2(n-1)) anode be connected with the negative electrode of the 2nd N diode (D2n);
The branch road that the 3rd branch road (3) is connected to form for an end of an end of resistance (R) and optical fiber emitting head (HFBR);
One end of the winding (W) of current transformer (4) is connected with the negative electrode of the 21 diode (D21) of the anode of the one one diode (D11) of first branch road (1), second branch road (2) and the other end of resistance (R);
The anode of the negative electrode of the other end of the winding (W) of current transformer (4) and a N diode (D1n) of first branch road (1), the 2nd N diode (D2n) of second branch road (2) and the other end of optical fiber emitting head (HFBR) are connected.
2. electrified railway vehicle location sensor according to claim 1 is characterized in that: described current transformer (4) adopts the core-theaded type structure, and the material of iron core is silicon steel, crystallite or permalloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102954336A CN101934745B (en) | 2010-09-29 | 2010-09-29 | Position sensor for electrified railway vehicles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102954336A CN101934745B (en) | 2010-09-29 | 2010-09-29 | Position sensor for electrified railway vehicles |
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| CN101934745A true CN101934745A (en) | 2011-01-05 |
| CN101934745B CN101934745B (en) | 2012-06-27 |
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| CN2010102954336A Expired - Fee Related CN101934745B (en) | 2010-09-29 | 2010-09-29 | Position sensor for electrified railway vehicles |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490292A (en) * | 2018-03-21 | 2018-09-04 | 中铁第四勘察设计院集团有限公司 | A kind of train travel section on-line monitoring method and system |
| CN108621865A (en) * | 2017-12-28 | 2018-10-09 | 株洲变流技术国家工程研究中心有限公司 | Floor switches cross split-phase bow net arc suppression method, restraining device and passing phase insulator device |
| CN110095675A (en) * | 2018-01-31 | 2019-08-06 | 株洲中车时代电气股份有限公司 | Three fractures of one kind cross split-phase train electrical stream detection method and device |
| CN110095057A (en) * | 2018-01-31 | 2019-08-06 | 株洲中车时代电气股份有限公司 | A kind of train pantograph method for detecting position, device, excessive phase method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139263Y (en) * | 1992-10-07 | 1993-07-28 | 杨文传 | Position sensor for stringing electric locomotive |
| CN2142191Y (en) * | 1992-11-03 | 1993-09-15 | 杨文传 | Magnetic control sensor for measuring position |
| JP2008018831A (en) * | 2006-07-12 | 2008-01-31 | Akebono Brake Ind Co Ltd | Pantograph position detection device and pantograph position detection method |
| JP2009220706A (en) * | 2008-03-17 | 2009-10-01 | Railway Technical Res Inst | Method and device for calculating current passing parallel connection point of different power source |
-
2010
- 2010-09-29 CN CN2010102954336A patent/CN101934745B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2139263Y (en) * | 1992-10-07 | 1993-07-28 | 杨文传 | Position sensor for stringing electric locomotive |
| CN2142191Y (en) * | 1992-11-03 | 1993-09-15 | 杨文传 | Magnetic control sensor for measuring position |
| JP2008018831A (en) * | 2006-07-12 | 2008-01-31 | Akebono Brake Ind Co Ltd | Pantograph position detection device and pantograph position detection method |
| JP2009220706A (en) * | 2008-03-17 | 2009-10-01 | Railway Technical Res Inst | Method and device for calculating current passing parallel connection point of different power source |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108621865A (en) * | 2017-12-28 | 2018-10-09 | 株洲变流技术国家工程研究中心有限公司 | Floor switches cross split-phase bow net arc suppression method, restraining device and passing phase insulator device |
| CN108621865B (en) * | 2017-12-28 | 2019-09-06 | 株洲变流技术国家工程研究中心有限公司 | Floor switches cross split-phase bow net arc suppression method, inhibit device and passing phase insulator device |
| CN110095675A (en) * | 2018-01-31 | 2019-08-06 | 株洲中车时代电气股份有限公司 | Three fractures of one kind cross split-phase train electrical stream detection method and device |
| CN110095057A (en) * | 2018-01-31 | 2019-08-06 | 株洲中车时代电气股份有限公司 | A kind of train pantograph method for detecting position, device, excessive phase method and system |
| CN108490292A (en) * | 2018-03-21 | 2018-09-04 | 中铁第四勘察设计院集团有限公司 | A kind of train travel section on-line monitoring method and system |
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| CN101934745B (en) | 2012-06-27 |
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