CN202067464U - Electronic signal board of speed limit suitable for existing railway - Google Patents
Electronic signal board of speed limit suitable for existing railway Download PDFInfo
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- CN202067464U CN202067464U CN2011200444983U CN201120044498U CN202067464U CN 202067464 U CN202067464 U CN 202067464U CN 2011200444983 U CN2011200444983 U CN 2011200444983U CN 201120044498 U CN201120044498 U CN 201120044498U CN 202067464 U CN202067464 U CN 202067464U
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Abstract
The utility model provides an electronic signal board of speed limit suitable for existing railway, comprising a power supply module, an LED display array, an LCD display module, a central processing system, a communication module of a vehicle-mounted communication device of speed limit, a module of wireless communication network, an external antenna unit and a GPS module. The power supply module is connected with the LED display array; the LED display array, the LCD display module and the GPS module are connected with the central processing system; the central processing system is respectively connected with the communication module of a vehicle-mounted communication device of speed limit and the module of wireless communication network; and the communication module of a vehicle-mounted communication device of speed limit, the module of wireless communication network and the GPS module are connected with the external antenna unit. The advantages of the electronic signal board of speed limit suitable for existing railway are that: a locomotive automatically receives corresponding speed limit information, when the locomotive passes through the signal board of speed limit; simultaneously the locomotive feeds back an execution result of speed limit information and present driving state to the signal board of speed limit; a ground scheduling center obtains the real-time execution result of speed limit information and the real-time present driving state; and security of driving is increased.
Description
[technical field]
The utility model is about a kind of railway speed-limiting device, is meant a kind of restricting signal board especially.
[background technology]
Speed limit is basic measures and the method that ensures any vehicles safety traffic, and speed limit is the primary guarantee of whole railway system safe operation in present railway.At present railway has multistage security system to the management and control of speed limit, and as last one barrier to the speed limit management: the worker is engaged in playing to point out to the end the trainman at the interval artificial restricting signal board wooden or made of iron that inserts of needs speed-limiting road section.When multistage safeguards system in front lost efficacy,, will cause great accident so if in time do not notice because of the trainman as the restricting signal board of last one safety guarantee." 428 accident " that took place at the Jiaozhou-Jinan railway in 2008 is exactly under the multistage in front security system situation about losing efficacy, and the trainman fails to notice the restricting signal board that the worker is engaged in inserting, and caused the generation of major accident.
Wooden and restricting signal board irony can only play the suggesting effect of information, is passive to the transmission of speed-limiting messages, and locomotive can't initiatively obtain corresponding speed-limiting messages by the restricting signal board time; Speed limit point also can't obtain the reception of locomotive and the execution result feedback of speed-limiting messages simultaneously, thereby can't thoroughly avoid the generation again of " 428 accident ".
Train operation monitoring and recording device is the important leverage equipment that ensures train safe, efficient, reliability service, through years of development comparatively ripe JK-93 type, LKJ2000 type have been arranged in China, and in national train, be widely used, belong to the supervising device of vehicle-mounted data mode.
Before driving, need maximum speed limit and teleseme, bridge, tunnel, curve, station coordinate, and distance, station write storage chip to information such as hair line track-spans between teleseme, there is complex circuit, train inlet parking or leave for unpredictable factors such as other branch line circuits by station track, train.There are problems such as standard disunity, data layout disunity in the LKJ that is equipped with because of the whole nation, the hidden danger of bringing to safety.
When discontinuous the or teleseme of track circuit signaling is not established code-emitting equipment, must can make train operation monitoring device control train operation, bring wrong probability thereby increased because of the steward by locomotive steward Attended Operation.
When locomotive wheel may slide on rail or dally in the train travelling process, the train operation distance that existing train operation monitoring device calculates will produce error with the ground actual coordinate, the generation of accident that this error can further cause that train advances rashly etc.
Simultaneously come in and go out a section traveling, accident rescue etc. of shunting service, locomotive also exist cab signal not receive the situation of terrestrial information, thereby cause the train operation monitoring device can't operate as normal.
The Ministry of Railways and each Railway Bureau have strengthened the safety management measure, and the construction of having strengthened operating line has walked abreast into the comparatively effective operating line safe construction management process of a cover with maintenance management, at first is that construction enterprises, track division report construction; Be freight department establishment construction operation figure then; Then LKJ, the management of scheduling construction platform, the slotting restricting signal board of track division are write by locomotive depot; Guarantee that at last driving is by complete and construction safety.
There is following shortcoming in existing working line safe construction management:
Shortcoming 1: though at present the Ministry of Railways has strict management process to also have the human factor leak for worker's speed limit of being engaged in.
Typical case is the major accident that the T195 and 5034 that occurred in the Jiaozhou-Jinan railway on April 28th, 2008 causes, cause 70 people's death altogether, 416 people are injured, 1 locomotive is badly damaged substantially, 14 joint compartments are scrapped, 648 meters railway lines and part traction power supply device damage, accident are interrupted glue Ji nearly 22 hours of line railways train operation up and down.
Casualty investigation findings is:
Support link 1: though Jinan office has printed and distributed " adjusting the notice of route map of train about carrying out the Jiao Ji Railway Line construction " April 23, make a copy for to Beijing locomotive depot simultaneously, but because of passing with general correspondence mode car, and before T195 left from Beijing, engineering was not subjected to this notice and has caused speed-limiting messages not write among the LKJ.
Support link 2: scheduling construction management platform has also been notified the station by phone in good time, but does not notify the train steward because of the station operator on duty neglects.
Support link 3: track division also inserts restricting signal board sign in construction line, be restricting signal board wooden or made of iron but have now, and train the steward do not see yet.
After above-mentioned 3 support links all lost efficacy, train did not have the correct speed-limiting messages that has changed according to ground to carry out suitable adjustment, thereby has caused the generation of accident.
Shortcoming 2: track division inserts the restricting signal board and is restricting signal board wooden or made of iron at present, can't accomplish visualized management.Specifically comprise:
1, can't its particular location of real-time follow-up.
2, can't conversion speed limit content in good time.
3, whether correctly the dispatching center can't obtain train perception speed-limiting messages and correct execution.
Shortcoming 3: the dispatching center can't obtain train speed limit executing state and result in real time.
Existing LKJ system can not in time the executing state and the result of the driving data of storage feed back to dispatching desk in advance with the LKJ basis, thereby cause existing driving states and current demand state to produce huge serial difference, and this serial difference cause the potential cause of major accident just.
Shortcoming 4: the whole network transparence that can't realize speed-limiting messages and LKJ duty.
1, the dispatching center can't initiatively obtain LKJ duty and execution result.
2, run into emergency situations, the dispatching center LKJ of across-the-board regulation in real time system.
3, the whole network can't be realized the real-time circulation and the transparence of speed-limiting messages.
[summary of the invention]
Technical problem to be solved in the utility model is to provide a kind of electronic speed limit annunciator that is applicable to existing railway that designs, can realize the complete visualized management of restricting signal board towards the existing railway circuit.
The utility model solves the problems of the technologies described above by the following technical programs: a kind of electronic speed limit annunciator that is applicable to existing railway, comprise power module, the digital array of display of LED, the LCD display module, the center processing system, vehicle-mounted speed limit communicator communication module, the cordless communication network module, the external antenna unit, and GPS module, described power module is connected to the digital array of display of LED, the digital array of display of described LED, LCD display module and GPS module are connected to the center processing system, described center processing system respectively with vehicle-mounted speed limit communicator communication module, the cordless communication network module links to each other, described vehicle-mounted speed limit communicator communication module, the cordless communication network module, and the GPS module all is connected to the external antenna unit.
This utility model further is specially:
Described power module comprises solar panel group, power management module, and system's accumulator, and described solar panel group is connected to power management module, and power management module is connected to system's accumulator and the digital array of display of LED.
The described electronic speed limit annunciator of existing railway that is applicable to also comprises the data communication encrypting module, and described center processing system links to each other with vehicle-mounted speed limit communicator communication module and cordless communication network module respectively by the data communication encrypting module.
The described electronic speed limit annunciator of existing railway that is applicable to also comprises ambient light according to photosensitive sensor, and described ambient light is connected to the center processing system according to photosensitive sensor.
The described electronic speed limit annunciator of existing railway that is applicable to also comprises infrared human body near monitoring means, and described infrared human body is connected to the center processing system near monitoring means.
Described center processing system forms two-shipper thermal capacitance disposal system by 2 application processors, 2 wireless mobile communications processors, 2 vehicle-mounted speed limit communicator protocol processors.Each wireless mobile communications processor and vehicle-mounted speed limit communicator protocol processor are connected respectively to corresponding application processor, the digital array of display of described LED, LCD display module, all be connected to the application processor of center processing system, the wireless mobile communications processor and the vehicle-mounted speed limit communicator protocol processor of described center processing system are connected with cordless communication network module, vehicle-mounted speed limit communicator communication module respectively.
Described vehicle-mounted speed limit communicator communication module is by 2.4G RF communication unit, 2.4G RF communication protocol processor, 2.4G the RF activated amplifier is formed, the center processing system sends to speed-limiting messages the 2.4G RF communication protocol processor of vehicle-mounted speed limit communicator communication module, this 2.4GRF communication protocol processor forms wireless communication signals with data by 2.4G RF communication unit, and amplify the back by 2.4G RF activated amplifier and launch by the external antenna unit, receive the locomotive answer signal of vehicle-mounted speed limit communicator transmission when the external antenna unit after, through being input in the 2.4G RF communication unit after the amplification of 2.4GRF activated amplifier, 2.4G RF communication unit carries out physical layer data and forms, send to 2.4G RF communication protocol processor after the data in link layer verification; This 2.4G RF communication protocol processor will carry out sending to the center processing system after data decode and the reorganization according to the 2.4G of system wireless communication protocol rules.
The utility model is applicable to that the advantage of the electronic speed limit annunciator of existing railway is:
1, the construction safety board relies on the artificial wooden or irony annunciator that inserts at present, and the insertion position is comparatively random, and the locomotive steward is untimely because of observing, weather conditions etc. can be can't see the prompting of restricting signal board.
The utility model is applicable to unified active 2.4G RF technology and the 2.4G RF data communication network of adopting of the electronic speed limit annunciator of existing railway; when guaranteeing that locomotive passes through this restricting signal board; locomotive can be received corresponding speed-limiting messages automatically, outputs to the LKJ system, reaches comprehensive transmission of speed-limiting messages.
2. the train speed limit execution result can't be transmitted to ground in the LKJ system at present, and ground maneuvers can not be known the time of day of train operation in real time.
The utility model is applicable to that the electronic speed limit annunciator of existing railway adopts special-purpose 2.4G RF data communication network technology, realized locomotive transmission speed limit executing state and result feedback to ground, thereby reached the ground maneuvers center and obtained train speed limit execution result and current running status in real time, in time find new problem, eliminate potential faults.
3. present LKJ obtains ground signal by the active balise and the passive balise on ground.This kind mode real-time is poor; Dropout is many, and the transponder frequency of operation of mating LKJ simultaneously can't transferring large number of data information than hanging down.
The utility model is applicable to the unified reliable transmission that adopts active 2.4G RF technology and 2.4G RF data communication network and relevant communication protocol to finish ground speed limit data of the electronic speed limit annunciator of existing railway.Lost efficacy, when the ground signal device lost efficacy, guaranteed that speed-limiting messages effectively effectively transmitted to LKJ with car data in the LKJ data, thereby improved traveling security.
4. present construction restricting signal board all adopts artificial insertion, lifts the board mode.Can't accomplish standardization, unitized, visual, quantification management.
The utility model be applicable to existing railway the electronic speed limit annunciator can with the restricting signal board with position coordinates, highly, parameter mode such as duty intuitively is presented at all departments' display terminal, thereby guarantee the correctness, reliability of restricting signal board, ageing, maneuverability, real-time.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the whole composition frame chart that the utility model is applicable to the electronic speed limit annunciator of existing railway.
[embodiment]
See also Fig. 1, the utility model is applicable to that the electronic speed limit annunciator of existing railway comprises solar panel group, power management module, system's accumulator, the digital array of display of LED, LCD display module, center processing system, data communication encrypting module, vehicle-mounted speed limit communicator communication module, cordless communication network module, external antenna unit, GPS module, ambient light according to photosensitive sensor, and infrared human body is near monitoring means.
Described solar panel group is connected to power management module, power management module is connected to system's accumulator and the digital array of display of LED, the digital array of display of LED, the LCD display module, ambient light is according to photosensitive sensor, infrared human body is near monitoring means, and the GPS module all is connected to the center processing system, described center processing system by the data communication encrypting module respectively with vehicle-mounted speed limit communicator communication module, the cordless communication network module links to each other, vehicle-mounted speed limit communicator communication module, the cordless communication network module, and the GPS module all is connected to the external antenna unit.
Described solar panel group provides system works needed electric energy for the electronic speed limit annunciator that is applicable to existing railway.
Described power management module is transported to the power conversion of solar panel group output then on system's accumulator and stores.And the power source conversion that will be stored in system's accumulator is to carry out luminous power supply by the digital array of display of driving LED.This power management module also provides the power supply of the various voltage and currents that system needs for system digits and analog processing circuit.
The digital array of display of described LED is made up of the digital luminous tube array of LED, led array driving circuit, dynamically shows the speed limit numerical information in LED luminotron mode.The led array driving circuit receives the idsplay order from the center processing system, forms the digital luminous tube array of scanning display timing generator driving LED of appointment, carries out dynamic speed limit numerical value and shows.The scanning display timing generator that the digital luminous tube array of LED receives the led array driving circuit drives and carries out array LED and light, thereby shows dynamic speed limit numerical information, these information is offered the driver watch.
Described GPS module can receive GPS position, gps time signal in real time, with the current position that is applicable to the electronic speed limit annunciator place of existing railway, comprises that longitude, latitude, height and time scale information form unified description message.
Described center processing system forms two-shipper thermal capacitance disposal system by 2 application processors, 2 wireless mobile communications processors, 2 vehicle-mounted speed limit communicator protocol processors.Each wireless mobile communications processor and vehicle-mounted speed limit communicator protocol processor are connected respectively to corresponding application processor, the digital array of display of described LED, LCD display module, ambient light are according to photosensitive sensor, and infrared human body all is connected to the application processor of center processing system near monitoring means.The wireless mobile communications processor and the vehicle-mounted speed limit communicator protocol processor of described center processing system are connected with vehicle-mounted speed limit communicator communication module, cordless communication network module by the data communication encrypting module respectively.
The principle of work of described center processing system is as described below:
1, be engaged in determining information such as position that this electronic speed limit annunciator that is applicable to existing railway inserts, speed limit time, speed limit numerical value as the worker by remote administration terminal after, can directly activate by the office terminal administration interface, be applicable to that then the electronic speed limit annunciator of existing railway enters long-range complete state of a control.
2, be engaged in after the workmen inserts the electronic speed limit annunciator that is applicable to existing railway at the scene as the worker, by the position button that reports of the electronic speed limit annunciator that is applicable to existing railway, the center processing system promptly reports current location to arrive central server by the cordless communication network module after accurately measuring current position coordinates by the GPS module; The current speed-limiting messages of electronic speed limit annunciator, the duty that simultaneously this are applicable to existing railway send to central server by the cordless communication network module, central server is applicable to that the electronic speed limit annunciator side of existing railway enters actual working state after all information of sending are carried out complete checks.
3, the electronic speed limit annunciator that is applicable to existing railway does not stop to periphery emission speed-limiting messages after entering duty.
4, when locomotive passed through, first electronic speed limit annunciator that is applicable to existing railway received the current speed-limiting messages that locomotive receives and postbacks by vehicle-mounted speed limit communicator communication module.The electronic speed limit annunciator that is applicable to existing railway can send to central server after receiving the speed-limiting messages that locomotive postbacks in real time.
5, vehicle-mounted speed limit communicator can constantly outwards be launched the status information that current locomotive is carried out speed limit, when second electronic speed limit annunciator that is applicable to existing railway receives the speed limit execution state information that locomotive sends by vehicle-mounted speed limit communicator communication module after, reply vehicle-mounted speed limit communicator, the speed limit execution state information that locomotive is sent sends to central server in real time simultaneously.
6, this is applicable to that the electronic speed limit annunciator application processing system of existing railway adopts the backup of two-shipper thermal capacitance, after wrong and fault occurring from the system discovery main system, adapter system initiatively, and report in real time to central server by the cordless communication network module.
Described ambient light is shone ambient light in real time according to photosensitive sensor and is converted to the application processor that electric signal is sent into electronic speed limit board center processing system, application processor draws current led array optimal brightness drive signal after calculating, the digital array of display of driving LED carries out brightness regulation, reaches best image and energy-conservation equilibrium treatment.
Described vehicle-mounted speed limit communicator communication module is made up of 2.4G RF communication unit, 2.4G RF communication protocol processor, 2.4G RF activated amplifier, be responsible for locomotive on existing LKJ system or other train control systems equipped communicate.
The principle of work of described vehicle-mounted speed limit communicator communication module is as described below:
1, the application processor of center processing system sends to speed-limiting messages the 2.4GRF communication protocol processor of vehicle-mounted speed limit communicator communication module by the vehicle-mounted speed limit communicator protocol processor of center processing system, this 2.4G RF communication protocol processor forms wireless communication signals with data by 2.4G RF communication unit, and amplifies the back by 2.4G RF activated amplifier and launch by the external antenna unit.
2, after the external antenna unit receives the locomotive answer signal of vehicle-mounted speed limit communicator transmission, through being input in the 2.4G RF communication unit after the amplification of 2.4G RF activated amplifier, 2.4G RF communication unit carries out sending to 2.4G RF communication protocol processor after physical layer data formation, the data in link layer verification; This 2.4G RF communication protocol processor will carry out sending to the electronic speed limit annunciator application processor that is applicable to existing railway after data decode and the reorganization according to the 2.4G of system wireless communication protocol rules.
Described cordless communication network module is combined by GSM-R wireless communication module and following arbitrary wireless module: GSM-R wireless communication module, EVDO or GPRS, TD-SCDMA, WCDMA module, finish data interaction function with control center, receiving the speed limit instruction that control center transmits on the one hand, is to upload electronic speed limit board essential information, duty, train transponder feedback information to control center on the one hand.
The principle of work of described cordless communication network module is as described below:
1, this part is the general data communication link with the GSM-R wireless communication module, in remote districts or not have area that GSM-R covers auxiliary with one of the present EVDO of China Telecom, the GPRS of China Mobile and TD-SCDMA, the WCDMA of CHINAUNICOM network, realize the two-wire reliable data transmission.
2, receive control from control center, order such as check; Send local contents such as the electronic speed limit annunciator position be applicable to existing railway, duty, current speed-limiting messages to control center.
Described data communication encrypting module is responsible for confidentiality, security, the information completeness of entire system communication.
The antenna requirements function of system's mobile communication module is finished in described external antenna unit; Finish the antenna requirements function of the 2.4G RF of system communication, receive and send the wireless mobile communications signal, receive and send 2.4G RF signal of communication.
Described infrared human body comprises pyroelectric infrared sensor groups and the infrared ray sensor treatment circuit that links to each other with each pyroelectric infrared sensor in the pyroelectric infrared sensor groups near monitoring means.Whether this infrared human body is monitored the comprehensive of this electronic speed limit annunciator that is applicable to existing railway on every side in real time near monitoring means has human body and animal dis to exist, and in real time to application processor transmitting supervisory result.Among the embodiment, can use 6 pyroelectric infrared sensors to form described pyroelectric infrared sensor groups, when the pyroelectric infrared sensor in any one orientation have human body or animal near the time, with this monitoring result notice application processor.
Though more than described embodiment of the present utility model; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; rather than be used for qualification to scope of the present invention; those of ordinary skill in the art are in the modification and the variation of the equivalence of doing according to spirit of the present invention, all should be encompassed in the scope that claim of the present invention protects.
Claims (7)
1. electronic speed limit annunciator that is applicable to existing railway, it is characterized in that: comprise power module, the digital array of display of LED, the LCD display module, the center processing system, vehicle-mounted speed limit communicator communication module, the cordless communication network module, the external antenna unit, and GPS module, described power module is connected to the digital array of display of LED, the digital array of display of described LED, LCD display module and GPS module are connected to the center processing system, described center processing system respectively with vehicle-mounted speed limit communicator communication module, the cordless communication network module links to each other, described vehicle-mounted speed limit communicator communication module, the cordless communication network module, and the GPS module all is connected to the external antenna unit.
2. the electronic speed limit annunciator that is applicable to existing railway as claimed in claim 1, it is characterized in that: described power module comprises solar panel group, power management module, and system's accumulator, described solar panel group is connected to power management module, and power management module is connected to system's accumulator and the digital array of display of LED.
3. the electronic speed limit annunciator that is applicable to existing railway as claimed in claim 1, it is characterized in that: also comprise the data communication encrypting module, described center processing system links to each other with vehicle-mounted speed limit communicator communication module and cordless communication network module respectively by the data communication encrypting module.
4. the electronic speed limit annunciator that is applicable to existing railway as claimed in claim 1 is characterized in that: also comprise ambient light according to photosensitive sensor, described ambient light is connected to the center processing system according to photosensitive sensor.
5. the electronic speed limit annunciator that is applicable to existing railway as claimed in claim 1 is characterized in that: also comprise infrared human body near monitoring means, described infrared human body is connected to the center processing system near monitoring means.
6. as each described electronic speed limit annunciator that is applicable to existing railway of claim 1 to 5, it is characterized in that: described center processing system is by 2 application processors, 2 wireless mobile communications processors, 2 vehicle-mounted speed limit communicator protocol processors are formed two-shipper thermal capacitance disposal system, each wireless mobile communications processor and vehicle-mounted speed limit communicator protocol processor are connected respectively to corresponding application processor, the digital array of display of described LED, the LCD display module, all be connected to the application processor of center processing system, the wireless mobile communications processor of described center processing system and vehicle-mounted speed limit communicator protocol processor respectively with the cordless communication network module, vehicle-mounted speed limit communicator communication module connects.
7. the electronic speed limit annunciator that is applicable to existing railway as claimed in claim 1, it is characterized in that: described vehicle-mounted speed limit communicator communication module is by 2.4G RF communication unit, 2.4G RF communication protocol processor, 2.4G the RF activated amplifier is formed, the center processing system sends to speed-limiting messages the 2.4G RF communication protocol processor of vehicle-mounted speed limit communicator communication module, this 2.4G RF communication protocol processor forms wireless communication signals with data by 2.4G RF communication unit, and amplify the back by 2.4G RF activated amplifier and launch by the external antenna unit, receive the locomotive answer signal of vehicle-mounted speed limit communicator transmission when the external antenna unit after, through being input in the 2.4G RF communication unit after the amplification of 2.4G RF activated amplifier, the 2.4GRF communication unit carries out physical layer data and forms, send to 2.4G RF communication protocol processor after the data in link layer verification; This 2.4G RF communication protocol processor will carry out sending to the center processing system after data decode and the reorganization according to the 2.4G of system wireless communication protocol rules.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011200444983U CN202067464U (en) | 2011-02-22 | 2011-02-22 | Electronic signal board of speed limit suitable for existing railway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200444983U CN202067464U (en) | 2011-02-22 | 2011-02-22 | Electronic signal board of speed limit suitable for existing railway |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295526A (en) * | 2013-06-09 | 2013-09-11 | 南车株洲电力机车研究所有限公司 | Light emitting diode (LED) display control system and method thereof |
| CN110682941A (en) * | 2019-09-12 | 2020-01-14 | 中国神华能源股份有限公司神朔铁路分公司 | Railway construction protection method, server and railway construction protection system |
| CN113593456A (en) * | 2021-07-20 | 2021-11-02 | 山西世恒铁路技术有限公司 | Movable multifunctional electronic signal board for railway and control system and control method thereof |
-
2011
- 2011-02-22 CN CN2011200444983U patent/CN202067464U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103295526A (en) * | 2013-06-09 | 2013-09-11 | 南车株洲电力机车研究所有限公司 | Light emitting diode (LED) display control system and method thereof |
| CN103295526B (en) * | 2013-06-09 | 2016-03-23 | 南车株洲电力机车研究所有限公司 | A kind of LED display control program and method thereof |
| CN110682941A (en) * | 2019-09-12 | 2020-01-14 | 中国神华能源股份有限公司神朔铁路分公司 | Railway construction protection method, server and railway construction protection system |
| CN113593456A (en) * | 2021-07-20 | 2021-11-02 | 山西世恒铁路技术有限公司 | Movable multifunctional electronic signal board for railway and control system and control method thereof |
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Granted publication date: 20111207 Termination date: 20180222 |