CN102495625A - Plug-in of track signal isolation circuit board - Google Patents
Plug-in of track signal isolation circuit board Download PDFInfo
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- CN102495625A CN102495625A CN2011103979034A CN201110397903A CN102495625A CN 102495625 A CN102495625 A CN 102495625A CN 2011103979034 A CN2011103979034 A CN 2011103979034A CN 201110397903 A CN201110397903 A CN 201110397903A CN 102495625 A CN102495625 A CN 102495625A
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Abstract
The invention discloses a plug-in of a track signal isolation circuit board. The plug-in comprises a direct-current signal isolation module, an amplitude reducing module, a current amplifying module, a transformer isolation module and a signal output module. The direct-current signal isolation module, the amplitude reducing module, the current amplifying module, the transformer isolation module and the signal output module are connected with one another in sequence. Track signals are input from a signal source; direct current isolation is carried out on the track signals by the direct-current signal isolation module; amplitude reduction is carried out on the track signals by the direct-current signal isolation module, and current amplification is carried out on the track signals by the current amplifying module; transformer isolation is carried out on the track signals by the transformer isolation module; and finally, more than two paths of mutually-isolated track signals are output by the signal output module according to a working condition forward or backward instruction. By implementing the plug-in described by the invention, a railway track signal environment of train operation and the high-precision and fully-isolated simulative railway track signals can be provided for a train security computer in development and debugging processes.
Description
Technical field
The present invention relates to a kind of track traffic signal equipment, especially relate to a kind of track signal buffer circuit board package that is applicable to rail traffic vehicles equipments such as locomotive, train, motor-car, city rail, subway.
Background technology
Row control fail-safe computer is the train operation special purpose computer of developing in order to improve railway security.In the railway testing apparatus of utilization at present, also be not specifically designed to the track signal isolated part of row control fail-safe computer test platform.Existing railway testing apparatus can not satisfy the testing requirement that row are controlled fail-safe computer aspect four, and the firstth, signal accuracy, the track signal amplitude that row control fail-safe computer needs is below 30mV, and existing equipment can't reach; The secondth, the Signal Spacing requirement, as testing apparatus, all signals all should be isolated with equipment under test, and existing equipment can't reach; The 3rd is that signal output port switches requirement, and respectively by the ground sensor reception track signal of front-end and back-end, existing equipment can't be simulated when train moved forward or backward; The 4th is the redundant output of track signal two-way, and the track signal that row control fail-safe computer need be imported is the two-way redundancy structure, and existing equipment can't reach.
Summary of the invention
The purpose of this invention is to provide a kind of track signal buffer circuit board package; This device can provide the railroad track signal environment of train operation for row control fail-safe computer in exploitation and debug process, for it provides high precision, full simulation railroad track signal of isolating.
In order to realize the foregoing invention purpose; The present invention specifically provides a kind of technic relization scheme of track signal buffer circuit board package, and a kind of track signal buffer circuit board package comprises: direct current signal isolation module, amplitude are dwindled module, electric current amplification module, transformer isolation module and signal output module; Direct current signal isolation module, amplitude are dwindled module, electric current amplification module, transformer isolation module and are linked to each other successively with signal output module; From signal source input track signal, track signal carries out dc-isolation through the direct current signal isolation module, dwindles module through amplitude and carries out amplitude and dwindle; And carry out electric current through the electric current amplification module and amplify; Carry out transformer isolation through the transformer isolation module, instruct forward or backward according to operating mode at last, through the mutual track signal more than two tunnel of isolating of signal output module output.
As the further improvement of a kind of track signal buffer circuit of the present invention board package technical scheme, signal output module is according to not isolating the output control signal, the track signal more than two tunnel that output is not isolated.The input signal of direct current signal isolation module comprises that further a rail road signal and a road reserves input signal, and the output signal of signal output module comprises the track signal that four tunnel track signals and four tunnel of isolating each other or not.Signal output module further comprises four relays, and four relays are exported four rail road signals, and every rail road signal is divided into two port outputs.Four relays are in normally open, the not rfpa output signal of output AC counting not isolating under the effective situation of output control signal; And under normally off, select to export four tunnel track signals of isolating each other through transformer.
Further improvement as a kind of track signal buffer circuit of the present invention board package technical scheme; The direct current signal isolation module comprises two electric capacity; Relay is an electromagnetic relay, and a rail road signal GDIN+ connects two electric capacity respectively through two output ports of an electromagnetic relay.
Further improvement as a kind of track signal buffer circuit of the present invention board package technical scheme; Amplitude is dwindled module and is comprised two first amplifier modules; Two first amplifier modules connect two electric capacity respectively; Two first amplifier modules adopt OP27 amplifier chip, and the first amplifier module will be passed through electric capacity and carried out the voltage signal amplitude attenuation 1/2 that direct current signal is isolated.
Further improvement as a kind of track signal buffer circuit of the present invention board package technical scheme; The electric current amplification module comprises two second amplifier modules; Two second amplifier modules connect the first amplifier module respectively; Two second amplifier modules adopt OPA551 amplifier chip, and the second amplifier module is amplified the voltage reversal that the voltage through the output of the first amplifier module carries out 1:1.
Further improvement as a kind of track signal buffer circuit of the present invention board package technical scheme; The electric current amplification module also comprises two the 3rd amplifier modules; Two the 3rd amplifier modules connect the second amplifier module respectively; Described two the 3rd amplifier modules adopt OPA551 amplifier chip, and the 3rd amplifier module is amplified the electric current through the output of the second amplifier module as voltage follower.
Further improvement as a kind of track signal buffer circuit of the present invention board package technical scheme; The transformer isolation module comprises two transformers; The input end of two transformers connects the 3rd amplifier module respectively; Each transformer comprises two groups of output signals, and totally four output terminals of two groups of output signals connect four relays of signal output module respectively, and the input and output voltage of said transformer is than being 10:1.
Through implementing the technical scheme of a kind of track signal buffer circuit of the invention described above board package, have following technique effect:
1, adopt track signal buffer circuit board package that the input signal of signal source is nursed one's health, the railroad track signal actual conditions when making it with train operation conform to, and make row control fail-safe computer satisfy actual request for utilization;
2, track signal buffer circuit board package of the present invention can provide high precision for row control fail-safe computer, full railroad track signal testing environment of isolating in exploitation and debug process;
3, can be for row control fail-safe computer provides the railroad track signal of simulation, so that find its design defect in the cab signal decoding.
Description of drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structured flowchart of a kind of embodiment of track signal buffer circuit board package of the present invention;
Fig. 2 is the circuit theory diagrams of a kind of embodiment of track signal buffer circuit board package of the present invention;
Among the figure, 1-direct current signal isolation module, the 2-amplitude is dwindled module, 3-electric current amplification module, 4-transformer isolation module, 5-signal output module, 6-signal source, OP27-OP27 amplifier chip, OPA551-OPA551 amplifier chip.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Shown in accompanying drawing 1, provided the specific embodiment of a kind of track signal buffer circuit of the present invention board package, below in conjunction with accompanying drawing and specific embodiment the present invention is described further.
Shown in accompanying drawing 1, track signal buffer circuit board package is used for track signal and isolates in the fail-safe computer test platform.A kind of exemplary embodiment of track signal buffer circuit board package; Comprise: direct current signal isolation module 1, amplitude are dwindled module 2, electric current amplification module 3, transformer isolation module 4 and signal output module 5; Direct current signal isolation module 1, amplitude are dwindled module 2, electric current amplification module 3, transformer isolation module 4 and signal output module 5 and are linked to each other successively; From signal source 6 input track signals, track signal carries out dc-isolation through direct current signal isolation module 1, dwindles module 2 through amplitude and carries out amplitude and dwindle; And carry out electric current through electric current amplification module 3 and amplify; Carry out transformer isolation through transformer isolation module 4, at last according to operating mode command signal KZ1 forward or backward, the track signal more than two tunnel of isolating each other through signal output module 5 outputs.Signal output module 5 is according to not isolating output control signal KZ2, the track signal more than two tunnel that output is not isolated.The input signal of direct current signal isolation module 1 comprises that further a rail road signal and a road reserves input signal, and the output signal of signal output module 5 further comprises the track signal that four tunnel track signals and four tunnel of isolating each other or not.Signal output module 5 further comprises four relays, and four relays are exported four rail road signals, and every rail road signal is divided into two port outputs.Four relays are in normally open, the not rfpa output signal of output AC counting not isolating under the effective situation of output control signal KZ2; And under normally off, select to export four tunnel track signals of isolating each other through transformer.
Shown in accompanying drawing 2, direct current signal isolation module 1 further comprises two electric capacity, and relay adopts electromagnetic relay, and a rail road signal GDIN+ connects two electric capacity respectively through two output ports of an electromagnetic relay.Amplitude is dwindled module 2 and is further comprised two first amplifier modules; Two first amplifier modules connect two electric capacity respectively; Two first amplifier modules adopt OP27 amplifier chip, and the first amplifier module will be passed through electric capacity and carried out the voltage signal amplitude attenuation 1/2 that direct current signal is isolated.Electric current amplification module 3 further comprises two second amplifier modules; Two second amplifier modules connect the first amplifier module respectively; Two second amplifier modules adopt OPA551 amplifier chip, and the second amplifier module is amplified the voltage reversal that the voltage through the output of the first amplifier module carries out 1:1.Electric current amplification module 3 also further comprises two the 3rd amplifier modules; Two the 3rd amplifier modules connect the second amplifier module respectively; Described two the 3rd amplifier modules adopt OPA551 amplifier chip; The 3rd amplifier module is amplified the electric current through the output of the second amplifier module as voltage follower.Transformer isolation module 4 further comprises two transformers; The input end of two transformers connects the 3rd amplifier module respectively; Each transformer comprises two groups of output signals; Totally four output terminals of two groups of output signals connect two relays of signal output module 5 respectively, and the input and output voltage of transformer is than being 10:1.
In the current driving ability design of track signal; At first carry out the isolated DC component behind the track signal injection signal isolation circuit board package; Adopt accurate amplifier OP27 amplifier chip with amplitude attenuation 1/2 then; Purpose is to improve input impedance, and the current driving ability of OP27 amplifier chip is 25mA.Make the voltage reversal amplification of 1:1 then of OPA551 amplifier chip; Increase simultaneously an OPA551 amplifier chip as voltage follower to improve current driving ability; The current driving ability of single OPA551 amplifier chip is 200mA, and two OPA551 are in order to driving transformer.
In the voltage-regulation ability design of track signal, the voltage magnitude scope in track signal source is 0V～10V.The load of output terminal is 66.7k Ω.Voltage range requires: the palpulus of the input signal of shift frequency standard reaches 8mV, and height is in 3V; UM71 input signal minimum is 85mV, the most just in 3V.Track signal buffer circuit board package is to amplitude decay 1/2 at OP27 amplifier chip place of track signal, and transformer 10:1 dwindles, and the current-limiting resistance of transformer front end has the dividing potential drop effect, and it outputs to the voltage attenuation 1/3 of transformer when being 470 Ω.So the UM71 signal that the frequency-shift signaling that sends 480mV in signal source in theory can export the track signal of 8mV, send 5100mV in signal source can be exported the track signal of 85mV, satisfies the requirement to track signal amplitude minimum value; At the track signal of signal source transmission 10V, the output signal amplitude is 0.17V, satisfies being no more than peaked requirement.
On the calculation Design of discharge circuit enlargement factor, to suppose to export direct current signal isolation module 1 to by signal source 6, the electric current that is input to direct current signal isolation module 1 input end then is I
In, be I through the electric current of 5.1k Ω resistance
2, then according to the empty short principle of the input end of amplifier, the electric current through 20k Ω feedback resistance equals the electric current through the 10k Ω resistance of its front, is I
2/ 2, and I is arranged
In=3I
2/ 2, can get thus: U
i=(10 * 3I
2/ 2+5.1 * I
2) * 10
3=20.1 * I
2* 10
3, U
o=(5.1 * I
2-30 * I
2/ 2) * 10
3=-9.9 * I
2* 10
3, the signal amplification ratio of the first amplifier module is U
o/ U
i=-9.9/20.1 ≈-1/2.The amplification ratio of the second amplifier module is: U
O2/ U
o=-R
f÷ R
In=-1:1, wherein, U
iBe the input voltage signal of the first amplifier module, U
oBe the output voltage signal of the first amplifier module, U
O2Be the output voltage signal of the second amplifier module, R
fBe the feedback resistance value of the second amplifier module, R
InIt is the input pickup resistance value of the second amplifier module.
Through two stage amplifer, U
O2/ U
i=1:2, the signal amplitude decay is half the, phase invariant, through circuit is carried out testing experiment, the result conforms to calculating.Amplifier must consider to introduce power supply noise and other undesired signals during to the marking current processing and amplifying.This track signal buffer circuit board package adopts is 24V commentaries on classics 12V power module, add at the power input of each amplifier module decouple, shunt capacitance.The design of transformer must be considered the signal bandwidth requirement, and the signal bandwidth area requirement is 400～2800Hz, and the carrying load ability of transformer takes in when design.Insert design adopts input of two-way signal source and the output of four road independent signals.Can satisfy the application requirements of fail-safe computer and ATP (Automatic Train Protection, train overspeed protective device) simultaneously.Plug-in unit through relay realize operating mode forward, single-ended signal output backward, and adopt transformer that track signal is isolated, satisfy the requirement of Signal Spacing.When, amplitude lower in signal source signal output noise level was big, the requirement to the test of track signal amplitude minimum threshold was satisfied in track signal output.
Track signal is isolated plug-in unit and is adopted IDA10-24D12W to change DC ± 12V power module as DC24V.Its full load output voltage range is-11.64～-12.36V, 11.88～12.36V, output current is 0.4A, output power 9.6W.The output of power module ± 12V power drives amplifier chip: 2 OP27 amplifier chips and 4 OPA551 amplifier chips, the service area of OP27 amplifier chip is not more than 22V, and the service area of OPA551 amplifier chip is not more than 30V.The voltage range and the output power of power module all meet the demands.
The panel of this plug-in unit is provided with 6 pilot lamp, and its definition is as shown in table 1 below:
| Pilot lamp | Definition | Remarks | Pilot | Definition | Remarks | |
| 1A | DC24V | Normally: bright | 1B | / | Empty | |
| 2A | +12V | Normally: bright | 2B | -12V | Normally: bright | |
| 3A | KZ1 | Operating mode, bright: as " backward ", to go out: " forward " acquiescence: go out | 3B | KZ2 | Standard, bright: " ac counting ", go out: other.Acquiescence: go out |
Table 1: track signal buffer circuit board package panel leds definition tabulation
Each interface definition of this plug-in unit is as shown in table 2 below:
| Numbering | Signal type | Characteristics of signals | Remarks | |
| 1 | The power supply input | DC5V | PXI plug-in unit 5V | |
| 2 | Power supply input ground | DC5G | PXI plug-in unit 5V ground | |
| 3 | The power supply input | DC24V | Power insert |
|
| 4 | Power supply input ground | DC24G | Power insert 24V ground | |
| 5 | Control signal 1 | KZ1 | The operating mode instruction, high level is " forward ", low level is " backward ", is defaulted as " forward " | |
| 6 | Control signal 2 | KZ2 | The standard instruction is low level during ac counting, otherwise is high level, is defaulted as |
|
| 7 | Control signal 3 | KZ3 | Subsequent use | |
| 8 | |
KZ4 | Subsequent use | |
| 9 | Track input 1+ | GD1N+ | The track signal input | |
| 10 | Track input 1- | GD1N- | Track signal input ground, with 12V altogether | |
| 11 | Track input 2+ | GD2N+ | Subsequent use | |
| 12 | Track input 2- | GD2N- | Subsequent use | |
| 13 | Track output 1+ | GD1+ | Track signal 1+ output | |
| 14 | Track output 1- | GD1- | Track signal 1-output | |
| 15 | Track output 2+ | GD2+ | Track signal 2+ output | |
| 16 | Track output 2- | GD2- | Track signal 2-output | |
| 17 | Track output 3+ | GD3+ | Track signal 3+ output | |
| 18 | Track output 3- | GD3- | Track signal 3-output | |
| 19 | |
| Track signal | 4+ output |
| 20 | Track output 4- | GD4- | Track signal 4-output | |
| 21 | Track output 5+ | GD5+ | Track signal 5+ output | |
| 22 | Track output 5- | GD5- | Track signal 5-output | |
| 23 | Track output 6+ | GD6+ | Track signal 6+ output | |
| 24 | Track output 6- | GD6- | Track signal 6-output | |
| 25 | |
| Track signal | 7+ output |
| 26 | Track output 7- | GD7- | Track signal 7-output | |
| 27 | Track output 8+ | GD8+ | Track signal 8+ output | |
| 28 | Track output 8- | GD8- | Track signal 8-output |
Table 2: track signal buffer circuit board package interface definition tabulation
The specific embodiment of the invention adopts track signal buffer circuit board package that the input track signal is nursed one's health, and the railroad track signal actual conditions when making it with train operation conform to, and makes row control fail-safe computer satisfy actual request for utilization; Adopt the railroad track Signal Isolation Technology, under the prerequisite that guarantees input track signal precision, adopt transformer that the signal that needs be connected between test platform and the equipment under test is isolated entirely, it is the actual track signal of train operation that the input track signal is nursed one's health; Adopt low amplitude value, high-precision analog orbit signal export technique; Through amplifier the track signal amplitude of signal source is dwindled with output low amplitude value signal; Through isolated amplifier track signal is isolated; The signal amplitude of minimum output reaches 8mV (pull-up resistor is 67k Ω), and regulates through the amplitude of input track signal is regulated the amplitude that realizes the analog orbit signal; Adopt analog orbit signal output port automatic switchover technology; When moving forward or backward, train receives track signal by the ground sensor of front-end and back-end respectively; Track signal buffer circuit board package automaticallyes switch according to the operating mode of train " forward " or " backward "; At respective ends output track signal, the other end is not exported.The amplifier chip that OP27 that is adopted in the middle of the specific embodiment of the invention and OPA551 amplifier chip also can adopt similar functions.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art; Do not breaking away under the technical scheme scope situation of the present invention; All the method for above-mentioned announcement capable of using and technology contents are made many possible changes and modification to technical scheme of the present invention, or are revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical scheme of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, be equal to replacement, equivalence changes and modify, all still belong in the scope that technical scheme of the present invention protects.
Claims (10)
1. track signal buffer circuit board package; It is characterized in that; Comprise: direct current signal isolation module (1), amplitude are dwindled module (2), electric current amplification module (3), transformer isolation module (4) and signal output module (5); Direct current signal isolation module (1), amplitude are dwindled module (2), electric current amplification module (3), transformer isolation module (4) and signal output module (5) and are linked to each other successively; From signal source (6) input track signal, track signal carries out dc-isolation through direct current signal isolation module (1), dwindles module (2) through amplitude and carries out amplitude and dwindle; And carry out electric current through electric current amplification module (3) and amplify; Carry out transformer isolation through transformer isolation module (4), instruct forward or backward according to operating mode at last, through the mutual track signal more than two tunnel of isolating of signal output module (5) output.
2. a kind of track signal buffer circuit board package according to claim 1 is characterized in that: said signal output module (5) is according to not isolating the output control signal, the track signal more than two tunnel that output is not isolated.
3. a kind of track signal buffer circuit board package according to claim 2; It is characterized in that: the input signal of said direct current signal isolation module (1) comprises that a rail road signal and a road reserves input signal, and the output signal of said signal output module (5) comprises the track signal that four tunnel track signals and four tunnel of isolating each other or not.
4. according to claim 2 or 3 described a kind of track signal buffer circuit board packages, it is characterized in that: described signal output module (5) comprises four relays, and four relays are exported four rail road signals, and every rail road signal is divided into two port outputs.
5. a kind of track signal buffer circuit board package according to claim 4; It is characterized in that: described four relays are in normally open not isolating under the output control signal effective situation, the output signal of not isolating with signal source of output AC counting; And under normally off, select to export four tunnel track signals of isolating each other through transformer.
6. a kind of track signal buffer circuit board package according to claim 4; It is characterized in that: described direct current signal isolation module (1) comprises two electric capacity; Described relay is an electromagnetic relay, and a rail road signal GDIN+ connects two electric capacity respectively through two output ports of electromagnetic relay.
7. a kind of track signal buffer circuit board package according to claim 6; It is characterized in that: described amplitude is dwindled module (2) and is comprised two first amplifier modules; Two first amplifier modules connect two electric capacity respectively; Described two first amplifier modules adopt OP27 amplifier chip, and the first amplifier module will be passed through electric capacity and carried out the voltage signal amplitude attenuation 1/2 that direct current signal is isolated.
8. a kind of track signal buffer circuit board package according to claim 7; It is characterized in that: described electric current amplification module (3) comprises two second amplifier modules; Two second amplifier modules connect the first amplifier module respectively; Described two second amplifier modules adopt OPA551 amplifier chip, and the second amplifier module is amplified the voltage reversal that the voltage through the output of the first amplifier module carries out 1:1.
9. a kind of track signal buffer circuit board package according to claim 8; It is characterized in that: described electric current amplification module (3) also comprises two the 3rd amplifier modules; Two the 3rd amplifier modules connect the second amplifier module respectively; Described two the 3rd amplifier modules adopt OPA551 amplifier chip, and the 3rd amplifier module is amplified the electric current through the output of the second amplifier module as voltage follower.
10. a kind of track signal buffer circuit board package according to claim 9; It is characterized in that: described transformer isolation module (4) comprises two transformers; The input end of two transformers connects the 3rd amplifier module respectively; Each transformer comprises two groups of output signals, and totally four output terminals of two groups of output signals connect four relays of signal output module (5) respectively, and the input and output voltage of said transformer is than being 10:1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110397903 CN102495625B (en) | 2011-12-05 | 2011-12-05 | Plug-in of track signal isolation circuit board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110397903 CN102495625B (en) | 2011-12-05 | 2011-12-05 | Plug-in of track signal isolation circuit board |
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| Publication Number | Publication Date |
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| CN102495625A true CN102495625A (en) | 2012-06-13 |
| CN102495625B CN102495625B (en) | 2013-09-18 |
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|---|---|---|---|
| CN 201110397903 Active CN102495625B (en) | 2011-12-05 | 2011-12-05 | Plug-in of track signal isolation circuit board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104460581A (en) * | 2014-09-29 | 2015-03-25 | 株洲南车时代电气股份有限公司 | Track signal generating device and method |
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| CN201287736Y (en) * | 2008-11-13 | 2009-08-12 | 绵阳市维博电子有限责任公司 | Multifunctional frequency shift signal detection sensor of train |
| CN201538336U (en) * | 2009-09-30 | 2010-08-04 | 中国北车集团大连机车研究所有限公司 | Driving unit of multiplex communication interface |
| CN201860313U (en) * | 2010-11-19 | 2011-06-08 | 陕西千山航空电子有限责任公司 | Signal isolation interface |
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2011
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001001899A (en) * | 1999-06-16 | 2001-01-09 | Mitsubishi Electric Corp | On-vehicle receiver for train control signal |
| CN1588475A (en) * | 2004-10-11 | 2005-03-02 | 兰州大成自动化工程有限公司 | Digital phase sensitive rail circuit receiver |
| CN201261474Y (en) * | 2008-06-17 | 2009-06-24 | 北京铁路信号工厂 | Double locomotive mutual redundant track circuit receiving apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104460581A (en) * | 2014-09-29 | 2015-03-25 | 株洲南车时代电气股份有限公司 | Track signal generating device and method |
| CN104460581B (en) * | 2014-09-29 | 2017-06-09 | 株洲南车时代电气股份有限公司 | A kind of track signal generating means and method |
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| Publication number | Publication date |
|---|---|
| CN102495625B (en) | 2013-09-18 |
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