CN102495625B - Plug-in of track signal isolation circuit board - Google Patents
Plug-in of track signal isolation circuit board Download PDFInfo
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- CN102495625B CN102495625B CN 201110397903 CN201110397903A CN102495625B CN 102495625 B CN102495625 B CN 102495625B CN 201110397903 CN201110397903 CN 201110397903 CN 201110397903 A CN201110397903 A CN 201110397903A CN 102495625 B CN102495625 B CN 102495625B
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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-currentsignal 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 plug-in of track signal isolation circuit board that is applicable to the 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 using 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 insulation request, 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 train forward or backward motion time does not receive track signal by the ground sensor of front-end and back-end, and existing equipment can't be simulated; The 4th is the redundant output of track signal two-way, and the track signal that row control fail-safe computer need to be inputted 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 plug-in of track signal isolation circuit board, this device can provide for row control fail-safe computer the railroad track signal environment of train operation in exploitation and debug process, for it provides the simulation railroad track signal of high precision, full isolation.
In order to realize the foregoing invention purpose, the present invention specifically provides a kind of technic relization scheme of plug-in of track signal isolation circuit board, a kind of plug-in of track signal isolation circuit board, comprise: the direct current signal isolation module, amplitude is dwindled module, the electric current amplification module, transformer isolation module and signal output module, the direct current signal isolation module, amplitude is dwindled module, the electric current amplification module, the transformer isolation module links 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, dwindling module by amplitude carries out amplitude and dwindles, and carry out electric current by the electric current amplification module and amplify, carry out transformer isolation by the transformer isolation module, at last according to forward or backward instruction of operating mode, by the track signal more than two tunnel of the mutual isolation of signal output module output.
As the further improvement of a kind of plug-in of track signal isolation circuit board technical scheme of the present invention, 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 further comprises a rail road signal and one tunnel reservation input signal, and the output signal of signal output module comprises four tunnel track signals of mutually isolating and four tunnel track signals of not isolating.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 in the effective situation of output control signal; And under normally off, select to export four tunnel track signals of mutually isolating through transformer.
Further improvement as a kind of plug-in of track signal isolation circuit board technical scheme of the present invention, the direct current signal isolation module comprises two electric capacity, relay is electromagnetic relay, and a rail road signal GDIN+ connects respectively two electric capacity through two output ports of an electromagnetic relay.
Further improvement as a kind of plug-in of track signal isolation circuit board technical scheme of the present invention, amplitude is dwindled module and is comprised two the first amplifier modules, two the first amplifier modules connect respectively two electric capacity, two the first amplifier modules adopt OP27 amplifier chip, and the first amplifier module will be carried out through electric capacity the voltage signal amplitude attenuation 1/2 of direct current signal isolation.
Further improvement as a kind of plug-in of track signal isolation circuit board technical scheme of the present invention, the electric current amplification module comprises two the second amplifier modules, two the second amplifier modules connect respectively the first amplifier module, two the 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 plug-in of track signal isolation circuit board technical scheme of the present invention, the electric current amplification module also comprises two the 3rd amplifier modules, two the 3rd amplifier modules connect respectively the second amplifier module, 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.
Further improvement as a kind of plug-in of track signal isolation circuit board technical scheme of the present invention, the transformer isolation module comprises two transformers, the input end of two transformers connects respectively the 3rd amplifier module, each transformer comprises two groups of output signals, totally four output terminals of two groups of output signals connect respectively four relays of signal output module, and the input and output voltage of described transformer is than being 10:1.
By implementing the technical scheme of a kind of plug-in of track signal isolation circuit board of the invention described above, have following technique effect:
1, adopt plug-in of track signal isolation circuit board 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 operation requirements;
2, plug-in of track signal isolation circuit board of the present invention can provide high precision, the railroad track signal testing environment of full isolation for row control fail-safe computer 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 was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structured flowchart of a kind of embodiment of plug-in of track signal isolation circuit board of the present invention;
Fig. 2 is the circuit theory diagrams of a kind of embodiment of plug-in of track signal isolation circuit board 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
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, 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 belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
As shown in Figure 1, provided the specific embodiment of a kind of plug-in of track signal isolation circuit board of the present invention, the invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, plug-in of track signal isolation circuit board is used for the track signal isolation in the fail-safe computer test platform.A kind of exemplary embodiment of plug-in of track signal isolation circuit board, comprise: direct current signal isolation module 1, amplitude is dwindled module 2, electric current amplification module 3, transformer isolation module 4 and signal output module 5, direct current signal isolation module 1, amplitude is dwindled module 2, electric current amplification module 3, transformer isolation module 4 links to each other successively with signal output module 5, from signal source 6 input track signals, track signal carries out DC-isolation through direct current signal isolation module 1, dwindling module 2 by amplitude carries out amplitude and dwindles, and carry out electric current by electric current amplification module 3 and amplify, carry out transformer isolation by transformer isolation module 4, at last according to operating mode command signal KZ1 forward or backward, by the mutual track signal more than two tunnel of isolation of 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 further comprises a rail road signal and one tunnel reservation input signal, and the output signal of signal output module 5 further comprises four tunnel track signals of mutually isolating and four tunnel track signals of not isolating.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 in the effective situation of output control signal KZ2; And under normally off, select to export four tunnel track signals of mutually isolating through transformer.
As shown in Figure 2, direct current signal isolation module 1 further comprises two electric capacity, and relay adopts electromagnetic relay, and a rail road signal GDIN+ connects respectively two electric capacity through two output ports of an electromagnetic relay.Amplitude is dwindled module 2 and is further comprised two the first amplifier modules, two the first amplifier modules connect respectively two electric capacity, two the first amplifier modules adopt OP27 amplifier chip, and the first amplifier module will be carried out through electric capacity the voltage signal amplitude attenuation 1/2 of direct current signal isolation.Electric current amplification module 3 further comprises two the second amplifier modules, two the second amplifier modules connect respectively the first amplifier module, two the 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 respectively the second amplifier module, 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 respectively the 3rd amplifier module, each transformer comprises two groups of output signals, totally four output terminals of two groups of output signals connect respectively two relays of signal output module 5, 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, then adopt accurate amplifier OP27 amplifier chip with amplitude attenuation 1/2, purpose is to improve input impedance, and the current driving ability of OP27 amplifier chip is 25mA.Then make the voltage reversal amplification of 1:1 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.Plug-in of track signal isolation circuit board decays 1/2 to the amplitude of track signal at OP27 amplifier chip place, 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.Therefore 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; Send the track signal of 10V in signal source, the output signal amplitude is 0.17V, satisfies to be 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 then is input to direct current signal isolation module 1 input end is I
In, be I by 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 by 20k Ω feedback resistance equals the electric current by 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, signal amplitude is decayed half, phase invariant, through circuit is carried out testing experiment, the result conforms to calculating.When amplifier is amplified processing to marking current, must consider to introduce power supply noise and other undesired signals.This plug-in of track signal isolation circuit board adopt for 24V turns the 12V power module, add decoupling, shunt capacitance at the power input of each amplifier module.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 the input of two-way signal source and the output of four road independent signals.Can satisfy simultaneously fail-safe computer and ATP(Automatic Train Protection, the train overspeed protective device) application requirements.Plug-in unit by relay realize operating mode forward, backward single-ended signal output, and adopt transformer that track signal is isolated, satisfy the requirement of signal isolation.Lower in signal source signal output noise level, when amplitude is larger, the requirement to the test of track signal amplitude minimum threshold is satisfied in track signal output.
Track signal isolation plug-in unit adopts IDA10-24D12W to turn 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.Voltage range and the output power of power module all meet the demands.
The panel of this plug-in unit arranges 6 pilot lamp, and it is defined as follows shown in the table 1:
| Pilot lamp | Definition | Remarks | Pilot lamp | 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: plug-in of track signal isolation circuit board 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 24V |
| 4 | Power supply input ground | DC24G | Power insert 24V ground |
| 5 | Control signal 1 | KZ1 | Operating mode instruction, high level are " forward ", and low level is " backward ", are defaulted as " forward " |
| 6 | Control signal 2 | KZ2 | The standard instruction is low level during ac counting, otherwise is high level, is defaulted as high level |
| 7 | Control signal 3 | KZ3 | For subsequent use |
| 8 | Control signal 4 | KZ4 | For 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+ | For subsequent use |
| 12 | Track input 2- | GD2N- | For 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 output 4+ | GD4+ | 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 output 7+ | GD7+ | 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: plug-in of track signal isolation circuit board interface definition tabulation
The specific embodiment of the invention adopts plug-in of track signal isolation circuit board 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 operation requirements; Adopt the railroad track Signal Isolation Technology, under the prerequisite that guarantees input track signal precision, adopt transformer that the signal that needs to be connected between test platform and the equipment under test is isolated entirely, the conditioning of input track signal is the actual track signal of train operation; Adopt low amplitude value, high-precision analog orbit signal export technique, by amplifier the track signal amplitude of signal source is dwindled to export the low amplitude value signal, by isolated amplifier track signal is isolated, it is 67k Ω that the signal amplitude of minimum output reaches the 8mV(pull-up resistor), and by the amplitude of input track signal being regulated the amplitude adjusting that realizes the analog orbit signal; Adopt analog orbit signal output port automatic switchover technology, train forward or backward motion time does not receive track signal by the ground sensor of front-end and back-end, plug-in of track signal isolation circuit board automaticallyes switch according to the operating mode of train " forward " or " backward ", at respective end output track signal, the other end is not exported.The amplifier chip that the OP27 that adopts 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.Although the present invention discloses as above with preferred embodiment, yet is not to limit the present invention.Any those of ordinary skill in the art, do not breaking away from the technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, be equal to replacements, equivalence changes and modify, all still belong in the scope that technical solution of the present invention protects.
Claims (8)
1. plug-in of track signal isolation circuit board, it is characterized in that, comprise: direct current signal isolation module (1), amplitude is dwindled module (2), electric current amplification module (3), transformer isolation module (4) and signal output module (5), direct current signal isolation module (1), amplitude is dwindled module (2), electric current amplification module (3), transformer isolation module (4) links to each other successively with signal output module (5), from signal source (6) input track signal, track signal carries out DC-isolation through direct current signal isolation module (1), dwindling module (2) by amplitude carries out amplitude and dwindles, and carry out electric current by electric current amplification module (3) and amplify, carry out transformer isolation by transformer isolation module (4), at last according to forward or backward instruction of operating mode, by the track signal more than two tunnel of the mutual isolation of signal output module (5) output; Described direct current signal isolation module (1) comprises electromagnetic relay and two electric capacity, and a rail road signal GDIN+ connects respectively two electric capacity through two output ports of electromagnetic relay; 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; Described amplitude is dwindled module (2) and is comprised two the first amplifier modules, and two the first amplifier modules connect respectively two electric capacity, and described the first amplifier module will be carried out through electric capacity the voltage signal amplitude attenuation 1/2 of direct current signal isolation; Described electric current amplification module (3) comprises two the second amplifier modules, and two the second amplifier modules connect respectively the first amplifier module, and described the second amplifier module is amplified the voltage reversal that the voltage through the output of the first amplifier module carries out 1:1; Described electric current amplification module (3) also comprises two the 3rd amplifier modules, and two the 3rd amplifier modules connect respectively the second amplifier module, and described the 3rd amplifier module is amplified the electric current through the output of the second amplifier module as voltage follower.
2. a kind of plug-in of track signal isolation circuit board according to claim 1 is characterized in that: described 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 plug-in of track signal isolation circuit board according to claim 1 and 2, it is characterized in that: the input signal of described direct current signal isolation module (1) comprises a rail road signal and one tunnel reservation input signal, and the output signal of described signal output module (5) comprises four tunnel track signals of mutually isolating and four tunnel track signals of not isolating.
4. a kind of plug-in of track signal isolation circuit board according to claim 3, it is characterized in that: described four relays are in normally open not isolating in 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 mutually isolating through transformer.
5. a kind of plug-in of track signal isolation circuit board according to claim 4 is characterized in that: described the first amplifier module employing OP27 amplifier chip.
6. a kind of plug-in of track signal isolation circuit board according to claim 5 is characterized in that: described the second amplifier module employing OPA551 amplifier chip.
7. a kind of plug-in of track signal isolation circuit board according to claim 6 is characterized in that: described the 3rd amplifier module employing OPA551 amplifier chip.
8. a kind of plug-in of track signal isolation circuit board according to claim 7, it is characterized in that: described transformer isolation module (4) comprises two transformers, the input end of two transformers connects respectively the 3rd amplifier module, each transformer comprises two groups of output signals, totally four output terminals of two groups of output signals connect respectively four relays of signal output module (5), and the input and output voltage of described 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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| CN102495625A CN102495625A (en) | 2012-06-13 |
| CN102495625B true CN102495625B (en) | 2013-09-18 |
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| 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 | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Family Cites Families (1)
| 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 |
-
2011
- 2011-12-05 CN CN 201110397903 patent/CN102495625B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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| Title |
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| JP特开2001-1899A 2001.01.09 |
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| CN102495625A (en) | 2012-06-13 |
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Address after: 412001 Hunan Province, Zhuzhou Shifeng District Tian Xin era Road No. 169 Patentee after: ZHUZHOU CRRC TIMES ELECTRIC Co.,Ltd. Address before: 412001 Hunan Province, Zhuzhou Shifeng District Tian Xin era Road No. 169 Patentee before: ZHUZHOU CSR TIMES ELECTRIC Co.,Ltd. |
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Effective date of registration: 20170619 Address after: 21, building 7, building 189, No. 410100, Renmin East Road, Changsha economic and Technological Development Zone, Hunan, Changsha Patentee after: HUNAN CRRC TIMES SIGNAL & COMMUNICATION Co.,Ltd. Address before: 412001 Hunan Province, Zhuzhou Shifeng District Tian Xin era Road No. 169 Patentee before: ZHUZHOU CRRC TIMES ELECTRIC Co.,Ltd. |