CN112793623A - BLVDS bus-based high-speed data recording device and method for train chassis - Google Patents
BLVDS bus-based high-speed data recording device and method for train chassis Download PDFInfo
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- CN112793623A CN112793623A CN201911106484.7A CN201911106484A CN112793623A CN 112793623 A CN112793623 A CN 112793623A CN 201911106484 A CN201911106484 A CN 201911106484A CN 112793623 A CN112793623 A CN 112793623A
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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
- B61L15/0072—On-board train data handling
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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
- B61L15/0018—Communication with or on the vehicle or vehicle train
- B61L15/0036—Conductor-based, e.g. using CAN-Bus, train-line or optical fibres
Abstract
The invention provides a BLVDS bus-based high-speed data recording device for a train case, which comprises a bus data processing module connected with a plurality of single boards in the train case through a BLVDS bus, a network interface for processing train control data and case state data transmitted through the BLVDS bus, acquiring the train control data and transmitting the data to a client, an offline downloading module for a user to download the data offline, and a data recording module, wherein one end of the data recording module is connected with a TCMS system through the network interface, and the other end of the data recording module is connected with the bus data processing module through an AXI bus, and the data recording module stores the train control data and the processed case state data. The device is used for transmitting data of the case single board at a high speed based on the BLVDS bus, the problems of insufficient real-time performance and transmission rate in the prior art are solved, in addition, a special data recording module is used for storing valuable data, the high-speed storage and controllability of the data are realized, and the big datamation of each component state in operation is greatly promoted.
Description
Technical Field
The invention relates to the technical field of traffic data processing, in particular to a BLVDS bus-based high-speed data recording device and method for a train chassis.
Background
At present, the intelligent diagnosis and operation and maintenance degree of a train in the field of rail transit transportation is low, the real-time state monitoring data quantity of each subassembly of the train is small, a chassis generally adopts a back plate bus such as CAN, RS485 and the like, only a small amount of key information and fault information CAN be stored in the chassis, and the running state data is sent to and stored by central control units of two head trains through a TCMS network. Because the data volume of the whole vehicle is large, the central control unit can store digital quantity and analog quantity data according to the frequency of 200ms in order to realize long-period storage, and the high-speed storage of state data is lacked. Along with the gradual expansion of the rail transit market scale, the operation mode is developing towards intellectuality, big datumization and diversification, and the operation speed also is constantly promoting, has proposed higher requirement to rail transit vehicle device's intellectuality, security, reliability and economic nature. At present, high-speed-class trains aim to monitor the states of equipment and predict the occurrence of potential faults in real time by using intelligent technologies such as a PHM (fault prediction and health management) system and the like, so that the trains can be ensured to run safely and reliably.
The data management technology in the prior art in the field mainly comprises the following two technologies, namely, the data in a brake system is acquired and stored by adopting a CAN bus; secondly, the storage array module is subjected to storage management by adopting an FPGA bus data processing module; by adopting the first scheme, the communication rate can only reach 1Mbps to the maximum extent, the requirements on the real-time performance and the rapidity of large-capacity data transmission cannot be met, meanwhile, the data storage efficiency is poor, and the data management controllability is insufficient. By adopting the second scheme, the data storage efficiency is poor, and the data cannot be systematically managed in the storage process.
Disclosure of Invention
To solve the above problems, the present invention provides a high speed data recording apparatus for a train chassis based on a BLVDS bus, which in one embodiment comprises:
the system comprises a bus data processing module, a data processing module and a data processing module, wherein the bus data processing module is connected with a plurality of single plates of a train chassis through a BLVDS bus and is used for processing chassis state data of the plurality of single plates transmitted at a high speed through the BLVDS bus and processing train control data to be sent to each single plate, and the chassis state data comprises key information, fault information and running state data;
the network interface acquires train control data from a train TCMS system through a network, and transmits the train control data and the processed case state data to the client;
the data recording module is connected with a TCMS system of the train through the network interface at one end and connected with the bus data processing module through an AXI bus at the other end, and is used for storing train control data from the TCMS system and processed case state data;
and the offline downloading module provides an offline downloading interface for a user to download the recorded train control data and the chassis state data offline.
In one embodiment, the bus data processing module comprises: the coding and transmitting unit is used for coding and transmitting the train control data from the data recording module according to the communication protocol of the BLVDS bus;
the decoding receiving unit is used for receiving the chassis state data transmitted by the BLVDS bus and decoding the chassis state data;
and the BLVDS transceiving submodule is used for receiving train control data from the data recording module and sending the decoded chassis state data to the data recording module.
In one embodiment, the data recording module stores the train control data and the processed chassis state data into an EXT4 file format system in an EMMC storage medium according to a set storage sampling period;
and the storage sampling period is more than or equal to the maximum sampling period and the maximum communication period of each single plate of the train case.
In one embodiment, the apparatus further includes a data maintenance module, connected to the data recording module through the network interface module, and configured to configure a data recording format, a recording period, and a capacity size of the data recording module, and perform deep parsing and displaying on the obtained data.
Based on other aspects of the present invention, there is also provided a method for recording high-speed data of a train chassis based on a BLVDS bus, the method comprising:
receiving chassis state data of a plurality of single boards in a train chassis transmitted at a high speed through a BLVDS bus, and processing the chassis state data;
receiving and storing the processed case state data transmitted by the AXI bus, and transmitting the processed case state data to a train TCMS (train control and management system) through a network;
receiving train control data from a train TCMS system and storing the train control data;
receiving and processing train control data transmitted by an AXI bus, and transmitting the processed train control data to each single board of a train case at a high speed through a BLVDS bus.
In one embodiment, the process of processing the chassis status data includes:
and decoding the chassis state data according to the communication protocol of the BLVDS bus, and sending the decoded chassis state data to a data recording module.
In one embodiment, a process for storing processed chassis state data for transmission over an AXI bus, comprises:
storing the processed cabinet state data into an EXT4 file format system in an EMMC storage medium according to a set storage sampling period;
and the storage sampling period is more than or equal to the maximum sampling period and the maximum communication period of each single plate of the train case.
In one embodiment, a process for processing train control data transmitted via an AXI bus, comprises: and coding the train control data according to the communication protocol of the BLVDS bus.
In one embodiment, the process of storing the train control data comprises:
storing the train control data into an EXT4 file format system in an EMMC storage medium according to a set storage sampling period; and the storage sampling period is more than or equal to the maximum sampling period and the maximum communication period of each single plate of the train case.
In one embodiment, the method further comprises: and configuring a data recording format, a recording period and a capacity in the data storage process through a network, and deeply analyzing and displaying the train control data and/or the detection state data acquired through the network.
Compared with the closest prior art, the invention also has the following beneficial effects:
the invention provides a BLVDS bus-based high-speed data recording device for a train case, which is provided with a bus data processing module for processing train control data and case state data of a plurality of single boards transmitted at high speed through the BLVDS bus, a network interface, an off-line downloading interface, and a data recording module, wherein one end of the data recording module is connected with a TCMS system of a train through the network interface, and the other end of the data recording module is connected with the bus data processing module through an AXI bus, and the data recording module is used for storing the train control data from the TCMS system and the processed case state data. The data recording device provided by the invention is used for transmitting the data of each single board of the chassis based on the BLVDS bus, so that the data communication speed is kept above 100M, the problems of insufficient real-time performance and transmission speed in the existing data processing technology are solved, the data recording device can be well applied to monitoring operation work of a novel train, in addition, the recording device provided by the invention adopts a special data recording module to manage and record the train control data and the chassis state data, the data storage speed and controllability are ensured to a certain extent, the required data can be reliably recorded, valuable train operation information can be obtained, and the safety and the stability in the train operation process can be better ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a high-speed data recording device of a train chassis based on a BLVDS bus according to an embodiment of the present invention;
fig. 2 is a schematic data reading flow chart of a BLVDS bus-based train chassis high-speed data recording method according to an embodiment of the present invention;
fig. 3 is a schematic data writing flow diagram of a BLVDS bus-based train chassis high-speed data recording method according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a data recording mechanism of a BLVDS bus-based train chassis high-speed data recording method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a high-speed data recording apparatus for a train chassis based on a BLVDS bus according to another embodiment of the present invention;
fig. 6 is a data analysis waveform display diagram of the method for recording high-speed data in a train chassis based on a BLVDS bus according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of a preprocessing flow of a method for recording high-speed data of a train chassis based on a BLVDS bus according to an embodiment of the present invention;
fig. 8 is a schematic flow chart of a method for recording high-speed data in a train chassis based on a BLVDS bus according to an embodiment of the present invention.
Detailed Description
The following detailed description will be provided for the embodiments of the present invention with reference to the accompanying drawings and examples, so that the practitioner of the present invention can fully understand how to apply the technical means to solve the technical problems, achieve the technical effects, and implement the present invention according to the implementation procedures. It should be noted that, unless otherwise conflicting, the embodiments and features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are all within the scope of the present invention.
Along with the gradual expansion of the rail transit market scale, the operation mode is developing towards intellectuality, big datumization and diversification, and the operation speed is also promoting constantly, and this has proposed higher requirement to the security, the reliability and the economic nature of rail transit operation management and equipment. At present, high-speed-class trains start to use intelligent technologies such as a PHM system (fault prediction and health management) and the like to monitor the states of equipment in real time and predict the occurrence of potential faults, so that the trains can be ensured to run safely and reliably.
However, the following common problems are also prevalent in the current research on the technology of high-speed processing of shipping data:
(1) the communication rate is insufficient, and the requirements of real-time performance and rapidity of mass data transmission cannot be met.
(2) The data storage efficiency is poor, the controllability of data management is insufficient, the data cannot be systematically managed based on a storage medium, and flexible calling and analysis are realized.
In order to solve the problems, the invention provides a high-speed data recording device and a high-speed data recording method for a train case based on a BLVDS bus, which transmit the state data of a plurality of single plates in the train case at a high speed through the BLVDS bus, overcome the defects of low communication rate of the state data of the traditional case, only a small amount of key information and fault information stored in the case, small monitoring amount and the like, record the data by adopting an arranged data storage and recording module, and are provided with a data maintenance module, so that the stored data can be controllably stored and managed, the data can be deeply analyzed and displayed, and the high-speed data recording device and the high-speed data recording method have great significance for reliable and safe operation of the traditional train and trains with higher speed grades and train PHM fusion. Various embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram illustrating a high-speed data recording apparatus for a train chassis based on a BLVDS bus according to an embodiment of the present invention, and as can be seen from fig. 1, the apparatus 1 includes:
and the bus data processing module is connected with the plurality of single plates of the train chassis through the BLVDS bus and is used for processing chassis state data of the plurality of single plates transmitted at high speed through the BLVDS bus and processing train control data to be sent to each single plate, and the chassis state data comprises key information, fault information and operation state data.
And the network interface acquires the train control data from the train TCMS through the network and transmits the train control data and the processed case state data to the client.
And one end of the data recording module is connected with a TCMS system of the train through a network interface, and the other end of the data recording module is connected with the bus data processing module through an AXI bus and used for storing train control data from the TCMS system and processed case state data.
And the offline downloading module provides an offline downloading interface for a user to download the recorded train control data and the chassis state data offline.
In one embodiment, the high speed data recording apparatus of the present invention further comprises: and the power supply module is used for connecting a power grid to supply power to the bus data processing module, the network interface, the offline downloading module and the data recording module.
The BLVDS bus is a new family of bus interface circuits based on LVDS technology, specifically for implementing multi-drop cable or backplane applications, with low voltage differential signaling of about 250mV and fast transition time. The BLVDS bus is a new family of bus interface circuits based on LVDS technology, specifically for implementing multi-drop cable or backplane applications, which differs from standard LVDS in being able to provide enhanced drive currents to handle the dual transmission required in multi-drop applications.
The BLVDS bus has low voltage differential signaling of about 250mV and fast transition time, which allows the product to reach a minimum of 100Mbps and high data transmission rates in excess of 1Gbps, and furthermore, the BLVDS bus can solve many challenges faced in the design of high data speed processing systems, which does not require special terminal pull-up rails, nor active termination devices, and can be implemented using common power supply rails (3.3V or 5V) and simple termination configurations, based on which its low voltage swing can minimize power consumption and noise, and support service card hot plugging and driving a heavy haul multi-drop bus at 100Mbps, the differential data transmission configuration provides a ± 1V common mode range and hot plugging devices of the active bus.
In one embodiment, the network interface is an ethernet network interface, which obtains train control data from the train TCMS system via ethernet and transmits the train control data and the processed enclosure status data to the client, for example, a user may transmit the train control data and the processed enclosure status data of the data recording module to a demand device, such as a personal computer, an intelligent device or other device and platform capable of realizing efficient storage, via the ethernet network interface.
In one embodiment, the offline download module employs a USB offline download interface for a user to download the recorded train control data and the chassis status data offline. In practical application, based on the USB interface, a user can copy the recording file by inserting the USB flash disk, and offline backup and analysis are performed according to requirements.
In one embodiment, the bus data processing module of the data recording device of the present invention operates through a multitasking mechanism, and when a single task is operated, the FPGA-based field programmable gate array module performs high-rate transmission on the chassis status data of each single board in the train chassis through the BLVDS bus and performs decoding processing according to the communication protocol of the BLVDS, so that an object receiving the chassis status data can be identified. Meanwhile, train control data to be transmitted to each single board of the train chassis is encoded to be transmitted at a high rate through the BLVDS bus. In this embodiment, the bus data processing module includes: the coding and transmitting unit is used for coding and transmitting the train control data from the data recording module according to the communication protocol of the BLVDS bus;
the decoding receiving unit is used for receiving the chassis state data transmitted by the BLVDS bus and decoding the chassis state data;
and the BLVDS transceiving submodule is used for receiving the train control data from the data recording module and sending the decoded chassis state data to the data recording module.
In this embodiment, the chassis status data after the encoding processing is sent to the data recording module through the AXI bus, where the detection status data comes from each board of the train chassis, and includes key data, fault data, operation status data, and the like in each board. In practical application, the number n of single boards in the train chassis is set differently according to the actual requirements of the train. The embodiment of the invention can be effectively applied to a large amount of chassis state data generated in the operation process of a novel train, and can carry out data communication at a high speed of more than 100M.
Specifically, in the data transmission process, the case state data is transmitted in the form of a data packet, for example, when data is transmitted between the data recording module and the bus data processing module, the parallel data adopts an 8B/10B coding/decoding mode, and when data is transmitted by parallel-serial conversion, the data packet is identified and determined by inserting a control code and CRC32 check data at the head and tail of the serial data stream, and discarding a CRC32 check error data packet, where the format of the data packet is shown in the following table:
wherein, data (data): user-defined data area, maximum 244 bytes.
The control code (K code) is used for distinguishing different data packets, the control code is automatically inserted into the head and the tail of the data packet, 1K 28.5 control code is adopted for identifying the beginning of one frame at the head of the data frame, 1K 28.1 control code is inserted into the tail of the data frame for identifying the end of one frame, and the two control codes are not required to appear in the middle of the data frame.
In one embodiment, the data recording module of the data recording device stores the train control data and the processed chassis state data into an EXT4 file format system in an EMMC storage medium according to a set storage sampling period.
And the storage sampling period is more than or equal to the maximum sampling period and the maximum communication period of each single plate of the train case.
Specifically, the data recording module is implemented by a Linux embedded software system, the MCU of the data recording unit is a microprocessor controller which can run embedded programs, and the high-performance MCU is adopted to store and manage train control data and chassis state data to be recorded. Therefore, in this embodiment, the data recording module includes an MCU submodule and an EMMC submodule, where the EMMC submodule is an EMMC storage medium with a large capacity and a high speed.
For the transmitted chassis state data, the data recording module performs various tasks such as data reading, data recording, data writing and sending to a train TCMS system. In the process of data reading, the following reading task flows are specifically adopted: firstly, reading a related read data zone bit in a data packet, if the zone bit is 1, reading data, performing CRC (cyclic redundancy check) check according to a communication protocol, and if the check is passed, performing data analysis and caching; if the verification fails, the reading is performed again, as shown in FIG. 2.
When the task of sending the write data to the train TCMS is carried out, the following write data flows are adopted to realize the following steps: the data to be transmitted is encoded according to the protocol, and the CRC check is performed on the transmitted data, and after the check code is added to the data area, as shown in fig. 3. And then data transmission is carried out, the chassis state data are processed and encoded, and then the chassis state data are transmitted to the train TCMS system through the Ethernet network interface according to the communication protocol of the required train.
In an alternative embodiment, the chassis state data may be transmitted to a train PHM (fault prediction and health management system) system communicatively connected to the train TCMS system through a network, so as to implement fault prediction and health management and big data state analysis of the train based on the PHM system, and provide richer data support for operation and control of the train.
Furthermore, in the process of recording data, an FIFO mechanism is adopted, according to information such as train number, carriage number, time and the like transmitted from a train TCMS system, the train synchronization time is adopted, the data records are stored according to a set storage sampling period, the storage period is more than or equal to the sampling period and the communication period of the chassis single board, and storage files meeting the period requirement are ensured to be in a storage medium. When the periodic interval is reached, the state data of the chassis is coded, arranged and written into a storage file with a carriage number, a file number and/or time as identifiers, the number of records is updated at the same time, when the number of records reaches a set value, a new storage file is newly built and the storage space at the moment is judged, and if the number of records exceeds 90% of the storage space, the earliest folder in the EMMC is deleted; if the storage space is less than 90%, new recording files are directly created and then recorded sequentially in the above-described recording manner, as shown in fig. 4.
In practical application, it is often necessary to perform deep analysis on a part or all of set data, however, in the prior art, deep analysis cannot be directly performed on the data, fig. 5 shows a schematic structural diagram of a high-speed data recording device of a train chassis based on a BLVDS bus according to another embodiment of the present invention, as shown in fig. 5, in this embodiment, the high-speed data recording device of the present invention further includes a data maintenance module, which is connected to the data recording module through a network interface module, and is configured to perform deep analysis and display on data recording format, recording cycle, and capacity of the data recording module, and on the obtained data.
In a preferred example, the data maintenance module adopts PTU maintenance software, which is data maintenance tool software running on a computer, and the PTU software can configure the data recording format, the recording period and the capacity in the data recording process, so as to implement portability setting of data storage. Meanwhile, the acquired data can be deeply analyzed according to the requirements, and the list or waveform display is carried out through a human-computer display interface, so that the real recovery and the fault analysis of the case state data are realized. In one example, a schematic of the analytic waveform of the data is shown in fig. 6.
In the high-speed data recording device of the train chassis based on the BLVDS bus, provided by the embodiment of the invention, each module or unit structure can independently operate or operate in a combined mode according to test requirements, so that corresponding technical effects are realized. The embodiment of the invention realizes the high-speed management of train data based on a backboard BLVDS high-speed bus, comprising high-speed data recording and high-speed data storage, wherein the device carries out large-bandwidth communication with each single board in a chassis through the hundred mega BLVDS bus, and sends train control data to each single board and receives chassis state data monitored by each single board; adopting a high-performance MCU to store the chassis data in an EMMC storage medium with large capacity and high speed; meanwhile, large-bandwidth data monitored by a chassis in real time can be connected with a train TCMS system and a train PHM system through Ethernet, data support is provided for train management and control, and the occurrence of potential faults is predicted, so that the train can run more safely and reliably. The PTU software is connected through the Ethernet, so that recorded data can be acquired according to requirements, flexible deep processing including deep analysis and multi-mode display can be performed on the recorded data, and management personnel can conveniently acquire available information implied in the data.
Based on one or more embodiments, the present invention further provides a method for recording high-speed data of a train chassis based on a BLVDS bus, as shown in fig. 7, when the method is operated, a device needs to be powered on, and a corresponding operating system is loaded and started, after the operating system is started and determined to be available, a device configuration file is read and related parameter initialization is performed, each module in the device is configured, for example, TCMS is timed, a time of the device is set, a communication cycle is set, and a data reading task, a data exchange task and a data recording task are further created. And meanwhile, the PTU software is configured based on the data recording format, the data recording period and the data storage upper limit, and data analysis and data display services are started.
After the preprocessing steps are completed, the flow of the method for recording the high-speed data of the train chassis of the present invention is entered, and fig. 8 shows a flow chart of the method for recording the high-speed data of the train chassis based on the BLVDS bus according to this embodiment. As shown in fig. 8, the method includes: and receiving the chassis state data of a plurality of single boards in the train chassis transmitted at high speed through the BLVDS bus, and processing the chassis state data.
And receiving and storing the processed case state data transmitted by the AXI bus, and transmitting the processed case state data to a train TCMS (train control and management system) through a network.
Train control data from the train TCMS system is received and stored.
And receiving and processing the train control data transmitted by the AXI bus, and transmitting the processed train control data to each single board of the train case at a high speed through the BLVDS bus.
In one embodiment, the process of processing the chassis status data includes:
and decoding the chassis state data according to the communication protocol of the BLVDS bus, and sending the decoded chassis state data to the data recording module. The process runs through a multitask mechanism, when a single task runs, the FPGA-based field programmable gate array module decodes the chassis state data according to the BLVDS communication protocol, the chassis state data is transmitted from each single board in the train chassis at a high speed through the BLVDS bus, and after the chassis state data is decoded, an object receiving the chassis state data can be identified.
Further, in the process of sending the decoded case state data to the data recording module, the case state data is transmitted in the form of a data packet, for example, when data is transmitted between the data recording module and the bus data processing module, the parallel data adopts an 8B/10B coding/decoding mode, when data is sent by parallel-serial conversion, the lower bit is before and the higher bit is after, the control code and CRC32 check data are inserted at the head and tail of the serial data stream for identification and validity judgment of the data packet, the CRC32 check error data packet is discarded, and the format of the data packet is shown in the following table:
wherein, data (data): user-defined data area, maximum 244 bytes.
The control code (K code) is used for distinguishing different data packets, the control code is automatically inserted into the head and the tail of the data packet, 1K 28.5 control code is adopted for identifying the beginning of one frame at the head of the data frame, 1K 28.1 control code is inserted into the tail of the data frame for identifying the end of one frame, and the two control codes are not required to appear in the middle of the data frame.
In one embodiment, the storing the processed chassis status data transmitted via the AXI bus includes:
and storing the processed cabinet state data into an EXT4 file format system in an EMMC storage medium according to the set storage sampling period. And the storage sampling period is more than or equal to the maximum sampling period and the maximum communication period of each single plate of the train case.
In the embodiment, a Linux embedded software system is adopted for data recording, the data recording is realized through an MCU (microprogrammed control unit) microprocessor controller, an embedded program can be operated, a high-performance MCU is adopted for storing and managing train control data and chassis state data to be recorded, and the processed chassis state data is stored to an EMMC (embedded media manager controller) storage medium with large capacity and high speed.
The data recording module is used for reading, recording and writing data of the machine case state data to be stored and sending the data to a train TCMS system. In the process of data reading, the following reading task flows are specifically adopted: firstly, reading a related read data zone bit in a data packet, if the zone bit is 1, reading data, performing CRC (cyclic redundancy check) check according to a communication protocol, and if the check is passed, performing data analysis and caching; if the verification fails, reading is carried out again.
When the task of sending the write data to the train TCMS is carried out, the following write data flows are adopted to realize the following steps: and coding the data to be transmitted according to the protocol, simultaneously carrying out CRC (cyclic redundancy check) on the transmitted data, and adding a check code to the data area. And then data transmission is carried out, the chassis state data are processed and encoded, and then the chassis state data are transmitted to the train TCMS system through the Ethernet network interface according to the communication protocol of the required train.
Furthermore, in the process of recording data, an FIFO mechanism is adopted, according to information such as train number, carriage number, time and the like transmitted from a train TCMS system, the train synchronization time is adopted, the data records are stored according to a set storage sampling period, the storage period is more than or equal to the sampling period and the communication period of the chassis single board, and storage files meeting the period requirement are ensured to be in a storage medium. When the periodic interval is reached, the state data of the chassis is coded, arranged and written into a storage file with a carriage number, a file number and/or time as identifiers, the number of records is updated at the same time, when the number of records reaches a set value, a new storage file is newly built and the storage space at the moment is judged, and if the number of records exceeds 90% of the storage space, the earliest folder in the EMMC is deleted; if the storage space is less than 90%, directly creating new recording files, and then sequentially recording according to the above recording mode.
In an alternative embodiment, the chassis state data may be transmitted to a train PHM (fault prediction and health management system) system communicatively connected to the train TCMS system through a network, so as to implement fault prediction and health management and big data state analysis of the train based on the PHM system, and provide richer data support for operation and control of the train.
In one embodiment, a process for processing train control data transmitted via an AXI bus, comprises: and carrying out coding processing on the train control data according to the communication protocol of the BLVDS bus. In this step, data to be sent to each single board of the train chassis is encoded according to a communication protocol of the BLVDS bus, so that the train control data is transmitted to each single board of the train chassis at a high speed through the BLVDS bus.
In one embodiment, in the process of receiving and storing train control data from a train TCMS system, the ethernet interface is used to receive train control data from the train TCMS system, and the process of further storing train control data includes: storing the train control data into an EXT4 file format system in an EMMC storage medium according to a set storage sampling period; and the storage sampling period is more than or equal to the maximum sampling period and the maximum communication period of each single plate of the train case. The specific operation of storing the train monitoring data is consistent with the operation of storing the monitoring state data in the above steps, and details are not repeated here.
In practical applications, it is often necessary to perform deep analysis on part or all of the set data, but the data cannot be directly deep analyzed in the storage medium, so in an embodiment, the method further includes:
and configuring a data recording format, a recording period and a capacity in the data storage process through a network, and deeply analyzing and displaying the train control data and/or the detection state data acquired through the network.
In a preferred example, parameters in the data storage process are configured and data are analyzed and displayed through PTU maintenance software running on a computer side. Specifically, the PTU software can configure the data recording format, the recording period, and the capacity during the data recording process, thereby realizing portability setting for data storage. Meanwhile, the acquired data can be deeply analyzed according to the requirements, and the list or waveform display is carried out through a human-computer display interface, so that the real recovery and the fault analysis of the case state data are realized. Based on the invention, the embodiment supports the configuration of the format, the period and the size of the data record through the PTU software, and realizes the portability setting of the data storage.
The method of the present invention based on the practical application of the above embodiment further comprises: and off-line copying or downloading the recorded train control data and the chassis state data through a USB interface or an Ethernet interface.
By adopting the data recording method of the embodiment of the invention, high-speed transmission and high-speed storage can be carried out on the data, meanwhile, the storage medium can be orderly managed, the condition that the data storage space is insufficient or the useless data is excessive is avoided, meanwhile, the data can be obtained through PTU software and the data can be deeply analyzed and displayed in various forms, and the invention is beneficial to providing more reliable data support for the monitoring operation of the train.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures, process steps, or materials disclosed herein but are extended to equivalents thereof as would be understood by those ordinarily skilled in the relevant arts. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, appearances of the phrase "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A high speed data recording apparatus for a train chassis based on a BLVDS bus, the apparatus comprising:
the system comprises a bus data processing module, a data processing module and a data processing module, wherein the bus data processing module is connected with a plurality of single plates of a train chassis through a BLVDS bus and is used for processing chassis state data of the plurality of single plates transmitted at a high speed through the BLVDS bus and processing train control data to be sent to each single plate, and the chassis state data comprises key information, fault information and running state data;
the network interface acquires train control data from a train TCMS system through a network, and transmits the train control data and the processed case state data to the client;
the data recording module is connected with a TCMS system of the train through the network interface at one end and connected with the bus data processing module through an AXI bus at the other end, and is used for storing train control data from the TCMS system and processed case state data;
and the offline downloading module provides an offline downloading interface for a user to download the recorded train control data and the chassis state data offline.
2. The train chassis high speed data recording device of claim 1, wherein the bus data processing module comprises:
the coding and transmitting unit is used for coding and transmitting the train control data from the data recording module according to the communication protocol of the BLVDS bus;
the decoding receiving unit is used for receiving the chassis state data transmitted by the BLVDS bus and decoding the chassis state data;
and the BLVDS transceiving submodule is used for receiving train control data from the data recording module and sending the decoded chassis state data to the data recording module.
3. The train chassis high-speed data recording device according to claim 1, wherein the data recording module stores the train control data and the processed chassis state data into an EXT4 file format system of an EMMC storage medium according to a set storage sampling period;
and the storage sampling period is more than or equal to the maximum sampling period and the maximum communication period of each single plate of the train case.
4. The high-speed data recording device for the train chassis according to any one of claims 1 to 3, further comprising a data maintenance module, connected to the data recording module through the network interface module, for configuring the data recording format, recording cycle and capacity of the data recording module, and performing deep parsing and displaying on the acquired data.
5. A method for high-speed data recording of a train chassis using the device according to any one of claims 1 to 4, the method comprising:
receiving chassis state data of a plurality of single boards in a train chassis transmitted at a high speed through a BLVDS bus, and processing the chassis state data;
receiving and storing the processed case state data transmitted by the AXI bus, and transmitting the processed case state data to a train TCMS (train control and management system) through a network;
receiving train control data from a train TCMS system and storing the train control data;
receiving and processing train control data transmitted by an AXI bus, and transmitting the processed train control data to each single board of a train case at a high speed through a BLVDS bus.
6. The method for high-speed data recording of a train chassis according to claim 5, wherein the processing of the chassis status data comprises:
and decoding the chassis state data according to the communication protocol of the BLVDS bus, and sending the decoded chassis state data to a data recording module.
7. The method for recording high-speed data in a train casing according to claim 5, wherein the step of storing the processed casing state data transmitted via the AXI bus comprises:
storing the processed cabinet state data into an EXT4 file format system in an EMMC storage medium according to a set storage sampling period;
and the storage sampling period is more than or equal to the maximum sampling period and the maximum communication period of each single plate of the train case.
8. The method for high-speed data recording in a train casing according to claim 5, wherein the process for processing train control data transmitted via the AXI bus comprises: and coding the train control data according to the communication protocol of the BLVDS bus.
9. The method of claim 5 wherein the act of storing the train control data comprises:
storing the train control data into an EXT4 file format system in an EMMC storage medium according to a set storage sampling period; and the storage sampling period is more than or equal to the maximum sampling period and the maximum communication period of each single plate of the train case.
10. The train chassis high-speed data recording method according to any one of claims 5 to 9, further comprising:
and configuring a data recording format, a recording period and a capacity in the data storage process through a network, and deeply analyzing and displaying the train control data and/or the detection state data acquired through the network.
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