CN116461568B - Train-mounted equipment time frequency on-line monitoring method - Google Patents
Train-mounted equipment time frequency on-line monitoring method Download PDFInfo
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- CN116461568B CN116461568B CN202310476980.1A CN202310476980A CN116461568B CN 116461568 B CN116461568 B CN 116461568B CN 202310476980 A CN202310476980 A CN 202310476980A CN 116461568 B CN116461568 B CN 116461568B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 238000012806 monitoring device Methods 0.000 claims abstract description 17
- 239000013078 crystal Substances 0.000 claims description 33
- 238000004891 communication Methods 0.000 description 5
- 230000003137 locomotive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L15/00—Indicators provided on the vehicle or vehicle train for signalling purposes ; On-board control or communication systems
- B61L15/0081—On-board diagnosis or maintenance
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/04—Tuning or receiving; Circuits therefor
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R40/00—Correcting the clock frequency
- G04R40/06—Correcting the clock frequency by computing the time value implied by the radio signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The time frequency local on-line monitoring device of the train on-board equipment acquires the time difference information of the remote reference end time and the GNSS time from an FTP server by acquiring the GNSS time from the GNSS; the time-frequency transmission and reception module is used for collecting time difference information, calculating a time-frequency adjustment value, synchronizing the system time of the train vehicle-mounted equipment to a standard time-frequency source which can be traced to UTC, and acquiring and monitoring the deviation value and stability index of the system time of the vehicle-mounted equipment compared with the standard time-frequency source in real time.
Description
Technical Field
The invention relates to the technical field of train safety monitoring, in particular to a time-frequency remote synchronization and on-line monitoring method and device for a train vehicle-mounted operation monitoring device and a train automatic protection system.
Background
The train running monitoring device (LKJ for short) is an important running device for preventing the train from running in and out, running overspeed and assisting a locomotive driver in improving the handling capacity, and is used for collecting and recording various locomotive running state information related to the safe running of the train while realizing safe speed control, automatically taking emergency braking to ensure the running safety when the train runs in overspeed, running signals and other dangerous conditions, and has higher requirement on time accuracy due to the actual functional characteristics.
The LKJ time synchronization depends on the peripheral interface to the locomotive positioning time service device configured in the locomotive and the motor train unit, and the information such as position, time and speed is calculated, and after the monitoring host receives satellite information, the monitoring host can correct time and position and broadcast the position, time and speed information to the outside in real time in a communication mode. For the LKJ2000 host, the calendar clock is regulated to have an error of not more than +/-90 s every 30d at 25 ℃.
The train automatic protection system (Automatic Train Protection, ATP) is an important vehicle-mounted component of the train operation control system, and any response thereof is directly hooked with train driving safety. On one hand, the ATP system needs to interact with system equipment such as a ground communication signal system, a train braking device and the like so as to ensure accurate issuing and execution of commands such as emergency braking, alarming and the like of the train; on the other hand, the ATP system belongs to a typical real-time train control system, and requires that the logic of the train control result is correct, and the time for generating the control result is also strictly required. The speed of the high-speed railway is continuously improved at present, and the high-precision synchronization of the train operation control and the train operation time becomes an important foundation of driving safety.
The ATP continuously and synchronously receives the target speed and distance information sent by the ground equipment, ensures that the running speed of the train does not exceed the target speed, and has higher time and frequency magnitude accuracy to ensure the running safety of the train, thus being an important link for time and frequency synchronous application in a railway communication signal system. The existing technical scheme provides that the vehicle-mounted ATP has the capability of checking a clock with the ATS, and the vehicle-mounted ATP can provide a clock signal for the train management system TMS.
However, the current related technical specifications lack specific technical description on the time synchronization requirement of the automatic train protection system, namely the requirements on specific time precision, link performance, information interface safety and other specific layers required by the LKJ/ATP system are not mentioned, and the time correction period, the system time and the standard time deviation alarm threshold of the LKJ/ATP system are unknown; secondly, the current LKJ/ATP system time reference source is single and is an indirect source, meanwhile, the stability of the self clock time frequency is poor or the self clock time frequency is not provided with a related internal time frequency source, when the external time frequency reference source fails, the long-term low-precision time keeping of the LKJ/ATP system itself can cause larger time frequency deviation, thereby influencing the real-time issuing of a driving instruction and forming potential safety hazards.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a method and a device for remotely synchronizing and monitoring the time frequency of train-mounted LKJ/ATP equipment on line.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the train-mounted LKJ/ATP equipment time-frequency local on-line monitoring device comprises a train-mounted antenna, a time-frequency transmission and reception module, a disciplinary time-frequency source module and an engineering control computer module:
the vehicle-mounted antenna is used for receiving GNSS signals and Web signals of the FTP server;
the time frequency transmission and reception module is used for acquiring time frequency information of the GNSS and the remote reference end through the GNSS signals received by the vehicle-mounted antenna and the Web signals of the FTP server and obtaining time difference information of the local end and the remote reference end through satellite common view;
the disciplinable time-frequency source module is connected to the engineering control computer module;
the engineering control computer module is connected to the time-frequency transmission and reception module, stores the time difference information of the disciplinable time-frequency source module and the remote reference end acquired by the time-frequency transmission and reception module, calculates the frequency difference, and obtains the current time-frequency adjustment value through a disciplinary control algorithm.
Further, the invention also discloses a train-mounted LKJ/ATP equipment time frequency local on-line monitoring method, which comprises the following steps:
step S1, acquiring GNSS time from a GNSS, and acquiring time difference information of remote reference end time and GNSS time from an FTP server;
s2, utilizing the obtained time difference information to adjust a disciplinable time frequency source module in real time, so as to realize disciplinary control;
s3, acquiring time of the LKJ/ATP built-in crystal oscillator, acquiring time of a disciplinable time-frequency source module, and adjusting the LKJ/ATP built-in crystal oscillator in real time by using the obtained time difference information to realize disciplinable control;
further, the invention also discloses a train-mounted LKJ/ATP equipment time-frequency remote on-line monitoring device, which comprises a train-mounted antenna, a time-frequency transmission and reception module and an engineering control computer module:
the vehicle-mounted antenna is used for receiving GNSS signals and Web signals of the FTP server;
the time-frequency transmission receiving device is connected with an LKJ/ATP built-in crystal oscillator, acquires time-frequency information of a GNSS and a remote reference terminal through GNSS signals and FTP server Web signals received by a vehicle-mounted antenna, and obtains deviation information of LKJ/ATP system time and the remote reference terminal through satellite common view;
and the engineering control computer module is connected to the time-frequency transmission and reception module, stores the time difference information acquired by the time-frequency transmission and reception module, predicts the time difference information and calculates a time-frequency adjustment value.
Further, the invention also discloses a train-mounted LKJ/ATP equipment time frequency remote on-line monitoring method, which comprises the following steps:
s1, acquiring LKJ/ATP built-in crystal oscillator time, acquiring GNSS time from a GNSS, and acquiring time difference information of remote reference terminal time and GNSS time from an FTP server;
s2, comparing the time of the LKJ/ATP built-in crystal oscillator with the time difference of the GNSS and the time of the remote reference terminal with the time difference of the GNSS through satellite common view to obtain the time difference between the current LKJ/ATP built-in crystal oscillator and the remote reference terminal;
and step S3, adjusting the LKJ/ATP built-in crystal oscillator in real time by using the time difference information obtained in the step S2, so as to realize tame control.
According to the technical scheme, the method and the system can synchronize the time of the vehicle-mounted LKJ/ATP system of the train to the standard time-frequency source which can be traced to UTC, and acquire and monitor the deviation value and the stability index of the time of the LKJ/ATP system compared with the standard time-frequency source in real time.
Drawings
FIG. 1 is a system block diagram of a time-frequency local on-line monitoring device according to the present invention;
fig. 2 is a system block diagram of a time-frequency remote on-line monitoring device according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
The structure of the local on-line monitoring device is shown in figure 1, and the local on-line monitoring device consists of a first module A, a second module B, a third module C and a fourth module D, and is respectively and directly or indirectly connected with a device A0, a device A1 and an element A2. The first module A is a vehicle-mounted antenna, the second module B is a time-frequency transmission and reception module, the third module C is a disciplinable time-frequency source module, and the fourth module D is an engineering control computer module; the equipment A0 represents an LKJ/ATP built-in crystal oscillator for providing a stable clock source, the equipment A1 represents an LKJ bus expansion box/ATP interface unit for information transmission through an expansion communication interface, and the equipment A2 represents an LKJ monitoring host/ATP safety computer for recording, storing and processing files such as vehicle-mounted control data; the device B0 represents a centralized monitoring interface unit for information transmission with a centralized monitoring system. The crystal oscillator is respectively connected with the LKJ bus expansion box/ATP interface unit and the time frequency transmission and reception module, the LKJ bus expansion box/ATP interface unit is respectively connected with the LKJ monitoring host/ATP safety computer and the engineering control computer module, and the engineering control computer module is also connected with the centralized monitoring interface unit. The local on-line monitoring device obtains standard satellite time through GNSS satellite common view, obtains remote reference end time through Web, and realizes the tame control of a local time frequency source through real-time difference, frequency difference measurement and clock tame algorithm, thereby ensuring the long-term high-precision time frequency magnitude output; and meanwhile, the time difference and the frequency difference of the LKJ/ATP built-in crystal oscillator and the disciplinable time-frequency source are measured and predicted, so that disciplinary control of the LKJ/ATP built-in crystal oscillator is realized, and time-frequency reference is provided for other equipment in the LKJ/ATP system.
The structure of the remote on-line monitoring device is shown in figure 2, and the remote on-line monitoring device consists of a first module A, a second module B and a third module C, and is respectively and directly or indirectly connected with a device A0, a device A1 and a component A2. The first module A is a vehicle-mounted antenna, the second module B is a time-frequency transmission and reception module, and the third module C is an engineering control computer module; the equipment A0 represents an LKJ/ATP built-in crystal oscillator for providing a stable clock source, the equipment A1 represents an LKJ bus expansion box/ATP interface unit for information transmission through an expansion communication interface, and the equipment A2 represents an LKJ monitoring host/ATP safety computer for recording, storing and processing files such as vehicle-mounted control data; the device B0 represents a centralized monitoring interface unit for information transmission with a centralized monitoring system. The crystal oscillator is respectively connected with the LKJ bus expansion box/ATP interface unit and the time frequency transmission and reception module, the LKJ bus expansion box/ATP interface unit is respectively connected with the LKJ monitoring host/ATP safety computer and the engineering control computer module, and the engineering control computer module is also connected with the centralized monitoring interface unit. The remote on-line monitoring device obtains standard satellite time through GNSS satellite common view, obtains remote reference end time through Web, and calculates and predicts time-frequency source time difference and frequency difference of the LKJ/ATP built-in crystal oscillator and the remote reference end time-frequency source time difference, so that the tame control of the LKJ/ATP built-in crystal oscillator is realized, and time-frequency reference is provided for other equipment in the LKJ/ATP system.
The application relates to a train on-vehicle LKJ/ATP equipment time frequency local on-line monitoring device, its characterized in that includes on-vehicle antenna, time frequency transmission receiving module, but tame time frequency source module and engineering control computer module:
the vehicle-mounted antenna is used for receiving GNSS signals and Web signals of the FTP server;
the time frequency transmission and reception module is used for acquiring time frequency information of the GNSS and the remote reference end through the GNSS signals received by the vehicle-mounted antenna and the Web signals of the FTP server and obtaining time difference information of the local end and the remote reference end through satellite common view;
the disciplinable time-frequency source module is connected to the engineering control computer module;
the engineering control computer module is connected to the time-frequency transmission and reception module, stores the time difference information of the disciplinable time-frequency source module and the remote reference end acquired by the time-frequency transmission and reception module, calculates the frequency difference, and estimates and predicts the frequency difference through a disciplinary control algorithm to obtain a current time-frequency adjustment value.
The method for locally monitoring the time frequency of the on-board LKJ/ATP equipment of the train on line is characterized by comprising the following steps of:
step S1, acquiring GNSS time from a GNSS, and acquiring time difference information of remote reference end time and GNSS time from an FTP server;
s2, utilizing the obtained time difference information to adjust a disciplinable time frequency source module in real time, so as to realize disciplinary control;
s3, acquiring time of the LKJ/ATP built-in crystal oscillator, acquiring time of a disciplinable time-frequency source module, and adjusting the LKJ/ATP built-in crystal oscillator in real time by using the obtained time difference information to realize disciplinable control;
the invention can synchronize the time of the train-mounted LKJ/ATP system to a standard time-frequency source from traceable source to UTC, and acquire and monitor the deviation value and stability index of the time of the LKJ/ATP system compared with the standard time-frequency source in real time.
The on-vehicle LKJ/ATP equipment time frequency remote on-line monitoring device of train, characterized by that, including on-vehicle antenna, time frequency transmission receiving module and engineering control computer module:
the vehicle-mounted antenna is used for receiving GNSS signals and Web signals of the FTP server;
the time-frequency transmission receiving device is connected with an LKJ/ATP built-in crystal oscillator, acquires time-frequency information of a GNSS and a remote reference terminal through GNSS signals and FTP server Web signals received by a vehicle-mounted antenna, and obtains deviation information of LKJ/ATP system time and the remote reference terminal through satellite common view;
and the engineering control computer module is connected to the time-frequency transmission and reception module, stores the time difference information acquired by the time-frequency transmission and reception module, predicts the time difference information and calculates a time-frequency adjustment value.
The method for remotely and online monitoring the time frequency of the on-board LKJ/ATP equipment of the train is characterized by comprising the following steps of:
s1, acquiring LKJ/ATP built-in crystal oscillator time, acquiring GNSS time from a GNSS, and acquiring time difference information of remote reference terminal time and GNSS time from an FTP server;
s2, comparing the time of the LKJ/ATP built-in crystal oscillator with the time difference of the GNSS and the time of the remote reference terminal with the time difference of the GNSS through satellite common view to obtain the time difference between the current LKJ/ATP built-in crystal oscillator and the remote reference terminal;
and step S3, adjusting the LKJ/ATP built-in crystal oscillator in real time by using the time difference information obtained in the step S2, so as to realize tame control.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (2)
1. The train vehicle-mounted equipment time frequency local on-line monitoring method comprises the following steps of: the system comprises a vehicle-mounted antenna, a time-frequency transmission and reception module, a disciplinable time-frequency source module and an engineering control computer module:
the vehicle-mounted antenna is used for receiving GNSS signals and Web signals of the FTP server;
the time frequency transmission and reception module is used for acquiring time frequency information of the GNSS and the remote reference end through the GNSS signals received by the vehicle-mounted antenna and the Web signals of the FTP server and obtaining time difference information of the local end and the remote reference end through satellite common view;
the disciplinable time-frequency source module is connected to the engineering control computer module;
the engineering control computer module is connected to the time-frequency transmission and reception module, stores the time difference information of the disciplinable time-frequency source module and the remote reference end acquired by the time-frequency transmission and reception module, calculates to obtain a frequency difference, and obtains a current time-frequency adjustment value through a disciplinary control algorithm; the train-mounted equipment further comprises a crystal oscillator, a bus extension box or a train automatic protection system interface unit, a monitoring host or a train automatic protection system safety computer and a centralized monitoring interface unit, wherein the crystal oscillator is respectively connected with the bus extension box or the train automatic protection system interface unit and a time frequency transmission and reception module, the bus extension box or the train automatic protection system interface unit is respectively connected with the monitoring host or the train automatic protection system safety computer and an engineering control computer module, and the engineering control computer module is also connected with the centralized monitoring interface unit; the train-mounted equipment is a train operation monitoring device or a train automatic protection system, and the train-mounted equipment time-frequency local on-line monitoring method comprises the following steps:
step S1, acquiring GNSS time from a GNSS, and acquiring time difference information of remote reference end time and GNSS time from an FTP server;
s2, utilizing the obtained time difference information to adjust a disciplinable time frequency source module in real time, so as to realize disciplinary control;
and S3, acquiring the time of the built-in crystal oscillator of the vehicle-mounted equipment, acquiring the time of the domesticable time-frequency source module, and adjusting the built-in crystal oscillator in real time by utilizing the acquired time difference information to realize the domestication control.
2. The train vehicle-mounted equipment time frequency remote on-line monitoring method comprises the following steps of: the system comprises a vehicle-mounted antenna, a time-frequency transmission and reception module and an engineering control computer module:
the vehicle-mounted antenna is used for receiving GNSS signals and Web signals of the FTP server;
the time-frequency transmission receiving module is connected with a built-in crystal oscillator of the vehicle-mounted equipment, acquires time-frequency information of the GNSS and the remote reference terminal through GNSS signals and FTP server Web signals received by the vehicle-mounted antenna, and obtains deviation information of the system time and the remote reference terminal of the vehicle-mounted equipment through satellite common view;
the engineering control computer module is connected to the time-frequency transmission and reception module, stores the time difference information acquired by the time-frequency transmission and reception module, predicts the time difference information and calculates a time-frequency adjustment value; the train-mounted equipment further comprises a crystal oscillator, a bus extension box or a train automatic protection system interface unit, a monitoring host or a train automatic protection system safety computer and a centralized monitoring interface unit, wherein the crystal oscillator is respectively connected with the bus extension box or the train automatic protection system interface unit and a time frequency transmission and reception module, the bus extension box or the train automatic protection system interface unit is respectively connected with the monitoring host or the train automatic protection system safety computer and an engineering control computer module, and the engineering control computer module is also connected with the centralized monitoring interface unit; the train vehicle-mounted equipment is a train running monitoring device or a train automatic protection system; the train vehicle-mounted equipment time frequency remote on-line monitoring method comprises the following steps of:
step S1, acquiring time of a built-in crystal oscillator of vehicle-mounted equipment, acquiring GNSS time from a GNSS, and acquiring time difference information of remote reference terminal time and GNSS time from an FTP server;
s2, comparing the time difference between the built-in crystal oscillator and the GNSS time difference with the time difference between the remote reference terminal and the GNSS time difference through satellite common view to obtain the time difference between the current built-in crystal oscillator and the remote reference terminal;
and step S3, adjusting the built-in crystal oscillator in real time by using the time difference information obtained in the step S2, so as to realize tame control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310476980.1A CN116461568B (en) | 2023-04-28 | 2023-04-28 | Train-mounted equipment time frequency on-line monitoring method |
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| CN202310476980.1A CN116461568B (en) | 2023-04-28 | 2023-04-28 | Train-mounted equipment time frequency on-line monitoring method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN116461568A (en) | 2023-07-21 |
| CN116461568A8 (en) | 2023-10-17 |
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Correction item: Classification number Correct: B61L 27/00(2022.01)|B61L 15/00(2006.01)|G04R 40/06(2013.01)|G04R 20/04(2013.01) False: B61L 15/00(2006.01) Number: 29-02 Page: The title page Volume: 39 Correction item: Classification number Correct: B61L 27/00(2022.01)|B61L 15/00(2006.01)|G04R 40/06(2013.01)|G04R 20/04(2013.01) False: B61L 15/00(2006.01) Number: 29-02 Volume: 39 |
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