CN112193279B - BTM with redundant architecture - Google Patents
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Abstract
The BTM of the redundant architecture comprises two independent transponder information channels and two processor modules, and sequentially sends the uplink information of the transponders to the two processor modules when passing through the same transponder; the two processor modules are connected through the inter-board redundant communication bus at the same time; the two processor modules can simultaneously provide two redundant communication B interfaces and send the final transponder information to the ATP according to the requirements; and under the condition that the position information of the transponders received by the double antennas is different, fitting the position information of the transponders received by the double systems to a coordinate system corresponding to one system of information channels by a transponder position information fitting processing method. The technical advantages of the invention are that a processing method for fitting the position information of the transponder of the dual BTM antenna based on the existing BTM and ATP interface scheme and a corresponding interface method with ATP are provided.
Description
Technical Field
The invention relates to the field of train control in the railway industry, in particular to a double-set hot standby transponder transmission module which improves the reliability of transponder information transmission under the condition of single-point failure.
Background
The BTM (Transponder) is used as an important component of each level of train control system/urban rail train control system of the CTCS, and the reliability of the BTM affects the reliability of a CTCS vehicle-mounted system/urban rail train control system to a great extent, so that the operation efficiency of the whole system is affected.
The BTM plays a key role in positioning of the train as an important ring in vehicle-mounted equipment. Most of traditional BTMs are single set of equipment, and the rate of system unavailability problems caused by BTM reliability is high. In a relatively common CTCS 2-level system in China, the BTM is used in a single set, and LKJ control is switched after a fault, so that the transportation efficiency is influenced. In a CTCS 3-level system, two sets of independent BTM single-set equipment are installed, a cold standby design is adopted, and after a fault occurs, parking is switched by a key of a driver, so that an ideal redundancy effect cannot be achieved. BTMs in a train control system of urban rail transit are mostly used in a single set from head to tail, and are also key points of reliability; even if some integrators adopt head-end redundancy, the understood transponder information redundancy effect cannot be achieved due to the position difference of the BTM dual antennas.
Disclosure of Invention
The invention provides a new BTM (Business to Business) architecture scheme, which solves the problem of hardware reliability of a single set of BTM equipment under the condition of single point of failure.
The invention provides a BTM (Business card manager) with a redundant architecture, wherein the BTM comprises two independent responder information channels, namely an A-system information channel and a B-system information channel, and simultaneously comprises two processor modules, namely an A-system processor module and a B-system processor module;
compared with the conventional existing BTM, the redundancy structure of the BTM means that two transponder uplink information channels are completely the same, and each channel is the same as the existing BTM and comprises the necessary modules of an antenna, power amplification, signal amplification and demodulator;
the system A information channel and the system B information channel work independently, are powered by independent power supplies, and sequentially send the uplink information of the transponders to the system A processor module and the system B processor module simultaneously when passing through the same transponder; when any channel fails, the other channel does not affect the work of the other channel, the A/B processor module can still receive the uplink information of the responder of the other channel, and the probability of missed detection of the BTM complete machine on the same responder is reduced;
the system A processor module and the system B processor module work independently, each system processor module can receive the uplink information of the responder of the system A/B information channel, and the two systems of processor modules are connected through the inter-board redundant communication bus; the method has the advantages that when any single point of failure occurs, the A/B system processor module can share the uplink information of the responder received by the A/B system processor module through the redundant communication bus;
the A-series processor module and the B-series processor module can simultaneously provide two redundant communication B interfaces and send final responder information to the ATP according to requirements;
and under the condition that the position information of the transponders received by the double antennas is different, fitting the position information of the transponders received by the double systems to a coordinate system corresponding to one system of information channels by a transponder position information fitting processing method.
The technical advantages of the invention are that a processing method for fitting the position information of the transponder of the double BTM antenna based on the existing BTM and ATP interface scheme and a corresponding interface method with ATP are provided, and the problem of asynchronous position of the transponder caused by redundant BTM antennas is solved.
Drawings
FIG. 1 is a logical block diagram of the BTM redundancy architecture of the present invention;
FIG. 2 is a schematic diagram of a processing method for fitting position information of a transponder
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will aid those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
The BTM architecture of the present invention, as shown in FIG. 1, includes two independent transponder information channels, namely, an A-system information channel and a B-system information channel. The new architecture simultaneously comprises two processor modules, namely an A-series processor module and a B-series processor module.
In contrast to conventional BTMs of existing applications, the present invention contains two identical transponder uplink information channels, each of which is identical to an existing BTM, containing the necessary modules for antenna, power amplification, signal amplification, demodulator, etc. Under the excitation of the signals sent by the power amplification module, the generated uplink information resonates with the antenna circuit through the air gap, is converted into signal amplitude which can be identified by a digital circuit through the signal amplification module, and is converted into a serial baseband code signal after being demodulated by the demodulator.
The system A information channel and the system B information channel work independently, are powered by independent power supplies, and sequentially send the uplink information of the transponders to the system A processor module and the system B processor module simultaneously when passing through the same transponder. The failure of any channel of the A/B information channel does not affect the work of the other system, the A/B processor module can still receive the uplink information of the responder of the other system information channel, and the missing detection probability of the BTM complete machine to the same responder is reduced.
The redundant architecture also comprises one or more processor modules, and the processor modules have the main functions of decoding the uplink signals of the transponder and performing safe 2-out-of-2 operation to ensure the information safety. The A system processor module and the B system processor module work independently, and each system processor module can receive the responder uplink information of the A/B system information channel. The two processor modules are connected through the inter-board redundant communication bus at the same time, and therefore when any single-point fault occurs, the A/B processor modules can share the uplink information of the responder received by the A/B processor modules through the redundant communication bus.
The A-system processor module and the B-system processor module can simultaneously provide 2 redundant communication B interfaces and send final transponder information to the ATP according to requirements.
The processing method for the transponder position information fitting of the processor board of the present invention is shown in fig. 2.
The invention provides a method for fitting transponder position information, which is characterized in that under the condition that the transponder position (time) information received by double antennas due to installation errors, installation condition limitation and other factors has difference, the transponder position information received by double systems is fitted to a coordinate system corresponding to one information channel by the method. From the perspective of ATP, the BTM only has one antenna, and actually, the BTM greatly improves the task reliability of the whole BTM through a redundant hardware information channel under the condition of not changing the interface of the existing single set of equipment and ATP.
Specifically, assume that the antenna in the a/B series information channel has a position difference δ when receiving the position of the ground-based transponder. If the value of delta is relatively small, the processing is relatively simple; if the value of delta is large, even several times the minimum transponder spacing, there is some processing difficulty.
The processing method for the transponder position information fitting of the scheme is mainly considered for the situation that the position difference delta of the dual-system antenna and one of the dual-system antenna fails to detect the transponder. As shown in fig. 2, if the a-series antenna is installed in front of the train traveling direction and the B-series antenna is installed in the rear. By the method, the BTM correspondingly fits the position information of the transponder received by the information channel of the A (B) system to the coordinate system corresponding to the information channel of the B (A) system, and the ATP takes the position information of the information channel of the B (A) system as the vehicle control information. In order to achieve the maximum redundancy effect of the system, it is recommended to use the position information with B as the reference point for controlling the vehicle.
The train passes through the transponders 1, 2 and 3 in the traveling direction, wherein A is an information channel antenna which successfully identifies the transponders 1 and 3, 2 is a missed-detection transponder, B is an information channel antenna which successfully identifies the transponders 2 and 3, and 1 is missed-detection transponder.
At any processor module angle, the antenna mounting location information difference δ is a known configuration. When the processor module first receives the transponder 1 information, the transponder 1 information is not immediately added to the result queue. The processor module calculates the relative position information of the train according to the speed information or other information and updates the relative position information in real time, and when the position information of the train is in a certain numerical value interval (the interval is related to the position difference delta and the position calculation error of the antenna), the processor module adds the information of the responder received by the antenna A into a result queue according to the position information index. There are two basic cases at this time:
1. the information of the responder 1 received by the processor module is corrected delta information and then is in front of the position information of the responder received by the antenna B;
2. the information of the responder 1 received by the processor module is corrected by delta information and then is received by the antenna B;
after fitting, the information of the transponder 1 has two corresponding position information L1 and L2 on the processor, which are the position information corresponding to the transponder 1 received by the antenna a and the antenna B, respectively. Due to the existence of factors such as environmental interference and calculation errors, L1 and L2 are not completely equal, and a relatively small position error exists. Because of the possibility that the single antenna fails to detect the transponder, the processor module filters two redundant information of L1 and L2 by using the same principle, the former of the position information in L1 and L2 is reserved as the final information of the transponder 1, and even under the condition that one of the A/B antennas fails to detect the transponder, the processor module has available transponder position information to report to ATP.
The interface method of the invention and ATP is to provide the responder position information of the line which is relative to the A (B) system information channel antenna as the reference for the ATP on the basis of not changing the interface specification of the existing single set of BTM equipment and the ATP, and ensure the provided responder information redundancy in the B interface of the A/B system processor module (or the seamless switching/redundancy switching of the information provided by the B interface of the A/B system processor module) under the support of the redundant communication bus between the A/B system processor modules.
The salient advantages of the BTM redundancy architecture of the present invention are described in detail below.
1. Transponder information redundancy function (internal synchronization module):
1) Physical redundancy:
the complete and independent A/B information channel increases the reliability of the BTM complete machine identification transponder.
The serial responder baseband code information output by the A/B information channel demodulator is simultaneously transmitted to the A/B processor module for cross connection, so that the availability of the BTM complete machine is ensured when a cross fault occurs.
When single point failure occurs to the A/B information channel and the A/B processor module, the availability of equipment is ensured, and physical redundancy is achieved.
2) Logical redundancy:
the A/B series processor modules are connected through the redundant communication bus, and even if the series processor modules do not successfully decode the transponder information for any reason, the transponder information of the series processor modules can be obtained through the redundant communication bus.
2. Dual antenna transponder position information fitting
The transponder information fitting method provided by the invention ensures that the problem of processing the position difference of the transponders of the dual-system antenna is avoided after the redundant BTM antenna is installed on the ATP, and the conventional single set of BTM and ATP interfaces are reserved, so that the complete redundancy of a point type information system is possible, and the system availability is greatly improved.
The technical scheme of the invention brings the following technical effects:
1. the interface between the existing BTM and the train control vehicle-mounted processor is reserved;
2. the probability of missed detection of the BTM complete machine to the transponder is reduced.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A BTM with a redundant architecture comprises two independent responder information channels, namely an A-system information channel and a B-system information channel, and simultaneously comprises two processor modules, namely an A-system processor module and a B-system processor module;
compared with the conventional existing BTM, the redundancy structure of the BTM means that two transponder uplink information channels are completely the same, and each channel is the same as the existing BTM and comprises the necessary modules of an antenna, power amplification, signal amplification and demodulator;
the system A information channel and the system B information channel work independently, are powered by independent power supplies, and sequentially send the uplink information of the transponders to the system A processor module and the system B processor module simultaneously when passing through the same transponder; when any system channel fails, the other system does not influence the work of the other system, and at the moment, the processor module of the system A or the system B can still receive the uplink information of the responder of the other system channel, so that the missing detection probability of the BTM complete machine on the same responder is reduced;
the processor module of the system A and the processor module of the system B work independently, and each processor module of the system A can receive the uplink information of the responder of the information channel of the system A or the system B;
the two processor modules are connected through an inter-board redundant communication bus; the system A processor module or the system B processor module can share the received uplink information of the responder through the redundant communication bus when any single point fault occurs;
the A-series processor module and the B-series processor module can simultaneously provide two redundant communication B interfaces and send final responder information to the ATP according to requirements;
under the condition that the position information of the transponders received by the double antennas is different, fitting the position information of the transponders received by the double antennas to a coordinate system corresponding to one information channel through a transponder position information fitting processing method;
assuming that the position difference of the antennas in the A-system or B-system information channel when receiving the position of the ground transponder is delta, the A-system antenna is installed in the front of the advancing direction of the train, the B-system antenna is installed in the rear, the BTM correspondingly fits the transponder position information received by the A-system information channel to the coordinate system corresponding to the B-system information channel, and the ATP takes the position information of the B-system information channel as the vehicle control information.
2. A BTM according to claim 1, wherein after fitting, the information of the same transponder has two corresponding position information L1 and L2 on any processor module, which are the position information corresponding to the transponder received by antenna a and antenna B, respectively, and L1 and L2 are not completely equal, there is a position error;
the processor module filters two redundant information of L1 and L2, and reserves the former of the position information in L1 and L2 as the final information of the responder; in the case that one of the antennas of the A or B series fails to detect the transponder, the processor module also has a transponder location information available to report to the ATP.
3. The BTM of claim 1, wherein the ATP is provided with line transponder location information referenced to any of the family information channel antennas without changing the interface specification of an existing single set of BTM devices with the ATP, and wherein redundancy of transponder information provided by the family a or B processor modules in the B interface, or seamless or redundant switching of information provided by the family a or B processor modules in the B interface, is ensured with the support of a redundant communication bus between the family a or B processor modules.
4. The BTM of claim 1, wherein the fitting of transponder location information processing method ensures that the ATP, after the BTM has installed redundant BTM antennas, is free from handling the transponder location difference problem of dual antenna, and retains the conventional single set of BTM and ATP interfaces, making it possible to make the point information system fully redundant.
5. A BTM according to claim 1, wherein serial transponder baseband code information from the demodulator output of the a-or B-family channels is simultaneously transmitted to the a-or B-family processor modules, cross-connected, to ensure overall BTM availability in the event of a cross-failure.
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| CN113147834B (en) * | 2021-03-09 | 2023-01-31 | 上海电气泰雷兹交通自动化系统有限公司 | Auxiliary train positioning system and method of CBTC (communication based train control) system |
| CN114268926A (en) * | 2022-01-27 | 2022-04-01 | 北京交大思诺科技股份有限公司 | BTM system with high-reliability framework |
| CN114104037B (en) * | 2022-01-28 | 2022-04-15 | 新誉轨道交通科技有限公司 | Vehicle-mounted signal equipment redundancy equipment, method, device and medium |
| CN115276710B (en) * | 2022-06-22 | 2024-01-30 | 交控科技股份有限公司 | Transponder transmission system, transponder positioning compensation method, device and medium |
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| CN101726623A (en) * | 2009-11-06 | 2010-06-09 | 上海磁浮交通工程技术研究中心 | Redundant positioning speed measurement system based on induction loop |
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| DE102009042359A1 (en) * | 2009-09-23 | 2011-03-24 | Rheinisch-Westfälische Technische Hochschule Aachen | Method for determining position of e.g. suburban train, involves adjusting positions of rail vehicle in region of rail track from overrunning balise to successive balise based on exact position of overrunning balise |
| CN101817354A (en) * | 2010-04-19 | 2010-09-01 | 北京交通大学 | Implementing method of virtual transponder |
| CN103778263B (en) * | 2012-10-23 | 2017-09-05 | 中车青岛四方机车车辆股份有限公司 | The apparatus and method of railcar data acquisition process |
| EP2862778B1 (en) * | 2013-10-15 | 2017-01-04 | Bayern Engineering GmbH & Co. KG | Method for generating measurement results from sensor signals |
| CN105083332A (en) * | 2015-03-20 | 2015-11-25 | 北京交通大学 | Train control vehicle-mounted system |
| CN110932838B (en) * | 2019-12-14 | 2022-03-29 | 北京交大思诺科技股份有限公司 | Synchronous redundant BTMs |
| CN111114593B (en) * | 2019-12-18 | 2021-01-01 | 中铁电气化局集团有限公司 | Subway train autonomous positioning device, system and method based on multivariate information fusion |
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| CN101726623A (en) * | 2009-11-06 | 2010-06-09 | 上海磁浮交通工程技术研究中心 | Redundant positioning speed measurement system based on induction loop |
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