CN103558813A - Recording method for recording MVB network physical layer data frame and recording device thereof - Google Patents
Recording method for recording MVB network physical layer data frame and recording device thereof Download PDFInfo
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Abstract
The invention relates to a network control device of a locomotive car based on MVB network technology, and particularly relates to a recording method for recording a MVB network physical layer data frame and a recording device for recording a MVB network physical layer data frame. The recording device comprises a MVB network controller card and an industrial control computer main board. The MVB network controller board comprises a physical firmware and a logic firmware which controls the physical firmware to complete the collection and storage functions of the MVB network physical layer data frame. The industrial control computer is connected with the MVB network controller board through an industrial control bus and is used for using the logic firmware to extract and record the MVB network physical layer data frame collected and stored by the physical firmware. According to the recording method and the recording device, the data frame transmitted by the physical layer on the MVB network can be recorded and stored, and a basic data support is provided for the analysis of train operation and fault conditions.
Description
Technical field
The present invention relates to the Bus based on MVB(Multifunction Vehicle, MVB) network control unit of the rolling stock of network technology, be specifically related to a kind of for record the recording method of MVB networked physics layer Frame and according to this pen recorder, realize for recording the recording method of MVB networked physics layer Frame.
Background technology
MVB bus network is a kind of communication bus network for rolling stock, be widely used at home and abroad at present on the rolling stock of high-speed railway and Urban Underground railway, railway traffic, possess high reliability and dirigibility, it is an important component part of IEC61375-3 standard, but due to strongly professional, its external interface is not also to facilitate especially.
Data recording equipment is a data storage device of being used widely gradually on rolling stock at present, can the registration of vehicle data in MVB transmission over networks in service, generally be placed in the cab of rolling stock, be convenient to maintainer data are downloaded and analyzed.Maintainer can obtain the file of the MVB bus network data of record from data recording equipment, then by means of relevant analysis software, just carries out analysis and the judgement of Vehicular behavior.
Domestic existing MVB data recording equipment operates mainly on the link layer of MVB network, therefore only can be recorded in process data, message data and the monitoring data of transmission over networks; And based on these data, the data on locomotive network and event are recorded and analyzed.Yet the data of MVB transmission over networks are not limited to above kind.The Frame transmitting in Physical layer (prime frame and from frame) is exactly the good object that network state is analyzed; Particularly, for the MVB network card equipment of independent research, a kind of equipment that can record Frame in MVB Physical layer, will bring very large benefit for research and development, test, debugging and the analysis of MVB network card equipment.Therefore, provide a kind of pen recorder and the recording method that can record MVB networked physics layer Frame very necessary.
Summary of the invention
(1) technical matters that will solve
The object of the present invention is to provide a kind of can record with store M VB network on pen recorder and the recording method of Frame of physical layer transmission, thereby can provide the Data support of bottom more for analyzing train operation and failure condition.
(2) technical scheme
Technical solution of the present invention is as follows:
For recording a pen recorder for MVB networked physics layer Frame, comprise MVB network controller board and industrial control computer mainboard;
Described MVB network controller board comprises physical firmware and controls the local firmware that described physical firmware completes the Frame collection of MVB networked physics layer and memory function;
Described industrial control computer mainboard is connected with described MVB network controller board by industrial-controlled general line, for extract and record the MVB networked physics layer Frame of described physical firmware collection and storage by described local firmware.
Preferably, described industrial control computer mainboard is the embedded x86 industrial control computer of PC104 mainboard, and described industrial-controlled general line is PC104 control bus.
Preferably, described physical firmware be take FPGA circuit as core, also comprises ARM chip, communication storer, PC104 bus interface, the MVB data transmission interface being connected with described FPGA circuit respectively and the flash memory being connected with described ARM chip.
Preferably, described local firmware comprises MVB bus receiver, redundant line steering logic, store control logic, internal bus and PC104 bus interface; Described store control logic is connected with MVB bus receiver with redundancy control logic successively by internal bus on the one hand, is connected on the other hand by described PC104 bus interface with described industrial control computer mainboard; Described MVB bus receiver comprises the first receiver and the second receiver.
Preferably, the embedded x86 industrial control computer of described PC104 mainboard comprises x86 central processing unit and the memory cell, PC104 bus interface and the USB interface that are connected with described x86 central processing unit respectively.
The present invention also provide a kind of according to above-mentioned any one pen recorder, realize for recording the recording method of MVB networked physics layer Frame:
For recording a recording method for MVB networked physics layer Frame, comprise step:
S1.MVB bus receiver resolves to Frame by the electric signal receiving and is stored in communication storer by store control logic;
S2. the central processing unit of industrial control computer mainboard by industrial-controlled general line to industrial-controlled general line interface sending controling instruction;
S3. industrial-controlled general line interface is sent to industrial control computer mainboard according to the steering order control store steering logic receiving by the Frame in communication storer;
S4. industrial control computer mainboard is resolved the Frame receiving be written in the data file being kept on memory cell.
Preferably, described steering order comprises and emptying in communication storer for the flush instructions of the fifo queue of store frames of data and for controlling the reading command that reads the Frame of head of the queue storage from described fifo queue.
Preferably, described step S1 further comprises:
S11. the first receiver and the second receiver are monitored all Frames that MVB link receives MVB networked physics layer simultaneously;
S12. the Frame informix that redundant line steering logic receives according to described the first receiver and the second receiver judge and selects a receiver that reliability is higher as trust receiver, and by internal bus to store control logic transfer control signal;
S13. described store control logic completes and Frame is stored into the function of fifo queue from trusting receiver according to the control signal receiving on the one hand, receives on the one hand steering order from PC104 bus interface and completes Frame and from fifo queue, read the function of PC104 bus interface;
S14. described PC104 bus interface receives the steering order of the embedded x86 industrial control computer of PC104 mainboard and is sent to described store control logic, the Frame reading is passed to industrial control computer mainboard simultaneously.
Preferably, described step S4 comprises:
S41. by PC104 bus interface, to store control logic, send flush instructions, fifo queue is cleared;
S42. the residual memory space of detection of stored device unit, if residual memory space, lower than default threshold value, is deleted writing time early than the data file of preset expiration time;
S43. on memory cell, create new data file, and record creation-time;
S44. judge whether can write, as write, continue if writing register, otherwise repeat judgement until can write;
S45. by PC104 bus interface, to store control logic, send reading command, judge that whether read register is readable, if readable, continue, otherwise repeat judgement until readable;
S46. Frame PC104 bus interface being sent is written in data file;
If S47. current time is pass by the default time interval apart from the creation-time of data file, close data file, and jump to step S42, otherwise jump to step S44.
Preferably, described step S4 also comprises,
The connection state of monitoring USB interface, when having monitored the connection of USB memory device, copies to the data file on memory cell in described USB memory device.
(3) beneficial effect
The embodiment of the present invention provide for recording recording method and the pen recorder of MVB networked physics layer Frame, utilize MVB network controller board as the hardware platform that gathers MVB networked physics layer Frame, utilize the embedded x86 industrial control computer of PC104 mainboard to control receiving and store data.By the present invention can record with store M VB network on the Frame of physical layer transmission, thereby can provide the Data support of bottom more for analyzing train operation and failure condition; Meanwhile, because the present invention can detect USB memory device automatically, connect and data file is copied to wherein, therefore thering is higher convenience and dirigibility.
Accompanying drawing explanation
Fig. 1 is the structural representation of physical firmware in the embodiment of the present invention;
Fig. 2 is the structural representation of local firmware in the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of recording method step S4 in the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described further.Following examples are only for the present invention is described, but are not used for limiting the scope of the invention.
In the present embodiment, first provide a kind of for recording the pen recorder of MVB networked physics layer Frame, this pen recorder mainly comprises MVB network controller board and industrial control computer mainboard;
MVB network controller board is the hardware platform that gathers MVB networked physics layer Frame, comprises physical firmware and local firmware.For example, physical firmware in the present embodiment mainly comprises FPGA(Field-Programmable Gate Array, i.e. field programmable gate array) circuit, ARM chip, Flash Rom(flash memory), Traffic memory(communication storer), industrial-controlled general line interface, MVB EMD interface (a kind of MVB data transmission interface) etc.Local firmware is the digital circuit part being designed by FPGA, be used for controlling physical firmware and complete the Frame collection of MVB networked physics layer and memory function, mainly comprise MVB bus receiver, redundant line steering logic, store control logic and PC104 bus interface etc.;
Industrial control computer mainboard is by industrial-controlled general line and two-way connection of MVB network controller board, for extract and record the MVB networked physics layer Frame of physical firmware collection and storage by local firmware; For example, in the present embodiment, industrial control computer mainboard can be the embedded x86 industrial control computer of PC104 mainboard, industrial-controlled general line is PC104 control bus, and the embedded x86 industrial control computer of PC104 mainboard comprises x86 central processing unit, memory cell, PC104 bus interface and USB2.0 interface etc.
Below to being described in detail for recording the various piece of the pen recorder of MVB networked physics layer Frame of providing in the present embodiment.
As shown in fig. 1, the physical firmware of MVB network controller board be take FPGA circuit as core, also comprises ARM chip, communication storer, PC104 bus interface, the MVB data transmission interface being connected with FPGA circuit respectively and the flash memory being connected with ARM chip.Outside expansion SRAM(Static RAM, static RAM) as communication memory, ARM chip is responsible for FPGA circuit to be configured, and the configuration information of FPGA circuit is stored in the flash memory being connected with ARM chip; MVB-PC104 plate meets MVB EMD interface requirement at MVB end; MVB-PC104 plate meets the requirement of PC104 bus interface at MVB end; The embedded x86 industrial control computer of PC104 mainboard is by PC104 bus interface and two-way connection of MVB network controller board, and the central processing unit of the embedded x86 industrial control computer of PC104 mainboard and MVB network controller board adopt UART-emulation communication protocol to communicate on the basis of PC104 bus interface.
As shown in Figure 2, the local firmware of MVB network controller board is the digital circuit part being designed by FPGA, comprises MVB bus receiver, redundant line steering logic, store control logic, internal bus and PC104 bus interface; Store control logic is connected with MVB bus receiver with redundancy control logic successively by internal bus on the one hand, thereby completes the reception memory function of Frame; By PC104 bus interface, be connected with industrial control computer mainboard on the other hand, complete Frame read and with the interactive function of the embedded x86 industrial control computer of PC104 mainboard; MVB bus receiver comprises the first receiver and the second receiver; Major function of the present invention is completed by these local firmware of FPGA circuit.
The embedded x86 industrial control computer of PC104 mainboard in the present embodiment comprises x86 central processing unit and the memory cell being connected with x86 central processing unit respectively, PC104 bus interface and USB interface.For example, the embedded x86 industrial control computer of PC104 mainboard can adopt the 104-1645CLDN of Yan Xiang company; Wherein x86 central processing unit adopts plate to carry AMD Geode LX700CPU, dominant frequency 500MHz; In carrying, plate saves as 256MBytes DDR SDRAM; On plate, memory cell 4 adopts the 2GBytes ADC(ATA Disk Chip of apacer company, ATA disk chip) electric board; Integrated 1 VGA(Video Graphics Array on plate, Video Graphics Array) display interface, 2 RS232 serial line interfaces, 1 IDE(Integrated Drive Electronics, ide) interface, 1 Ethernet interface, 1 PS/2 mouse/keyboard interface, 2 USB2.0 interfaces, 1 PC104 bus interface; Carry ttylinux operating system (a small-sized GNU/Linux system).
In the present embodiment, also provide a kind of according to above-mentioned pen recorder, realize for recording the recording method of MVB networked physics layer Frame; This recording method mainly comprises the following steps:
S1.MVB network controller board inputs to MVB bus receiver by the electric signal transmitting in MVB bus network by MVB EMD interface, and MVB bus receiver resolves to Frame by the electric signal receiving and is stored in communication storer by store control logic;
The central processing unit of the embedded x86 industrial control computer of S2.PC104 mainboard passes through PC104 control bus to PC104 bus interface sending controling instruction;
S3.PC104 bus interface is resolved according to the steering order control store steering logic receiving the Frame receiving in communication storer, and is sent to the embedded x86 industrial control computer of PC104 mainboard by PC104 control bus;
S4. industrial control computer mainboard is resolved the Frame receiving be written in the data file being kept on memory cell.
Below to being described in detail for recording the part steps of the recording method of MVB networked physics layer Frame of providing in the present embodiment.
Step S1 further comprises:
S11.MVB EMD interface is connected in MVB bus network, MVB bus network comprises First Line and two data circuits of the second line, Manchester level signal of transmitting on circuit is sent to respectively the first receiver and second receiver of MVB bus receiver through MVB EMD interface, the first receiver and the second receiver are digital signal by Manchester signal decoding, form Frame; Meanwhile, the Frame information (comprising the information such as valid frame, frame conflict, erroneous frame, interFrameGap) receiving to redundancy control logic transmission;
S12. the Frame information (comprising the information such as valid frame, frame conflict, erroneous frame, interFrameGap) that redundant line steering logic receives according to the first receiver and the second receiver comprehensively judges and selects a receiver that reliability is higher as trusting receiver (i.e. First Line or the second line are trusted in judgement), and by internal bus (comprising control bus and data bus) to store control logic transfer control signal (comprise export following status word the 5th, the 6th);
S13. store control logic completes and Frame is stored into the function of fifo queue from trusting receiver according to the control signal receiving on the one hand, receive on the one hand the steering order from PC104 bus interface, and decoding, according to the steering order after decoding, complete Frame and from fifo queue, read the function of PC104 bus interface;
S14.PC104 bus interface receives the steering order of the embedded x86 industrial control computer of PC104 mainboard and is sent to store control logic, the Frame reading is passed to the embedded x86 industrial control computer of PC104 mainboard simultaneously.
Step S2 further comprises:
The central processing unit of the embedded x86 industrial control computer of PC104 mainboard passes through PC104 control bus to industrial PC 104 bus interface sending controling instructions; Steering order comprises and emptying in communication storer for the flush instructions of the fifo queue of store frames of data and for controlling the reading command that reads the Frame of head of the queue storage from fifo queue; For example:
Flush instructions: a byte data 0x42; Store control logic receives after this instruction, empties immediately the fifo queue for store frames of data;
Reading command: a byte data 0x46; Store control logic receives after this instruction, reads immediately the Frame of head of the queue storage from fifo queue, and prepares it by PC104 control bus, to be transferred to central processing unit.
The length that is transferred to the data of central processing unit can be 1,3,5,9,17 or 33 byte; These data comprise two parts: status word and Frame.The value of status word is as shown in table 1:
The value explanation of table 1 status word
For example, if fifo queue is empty, do not have the Frame can be for reading, status word everybody be all 0, and the length of Frame is thereafter 0.
Step S4 is completed by the computer program operating on (SuSE) Linux OS of the embedded x86 industrial control computer of PC104 mainboard.
As shown in Figure 3, step S4 further comprises:
S41. after computer starting, operating system is carried out initialization automatic service data logging program; Program sends flush instructions by PC104 bus interface to store control logic, makes fifo queue be cleared to prepare receiving network data;
S42. the residual memory space of detection of stored device unit, if residual memory space, lower than default threshold value, deletes to increase storage space by writing time early than the data file of preset expiration time;
S43. on memory cell, create new data file, and record creation-time;
S44. read the value of LSR register, whether judgement is write register and can be write, and continues, otherwise repeat judgement until can write as write;
S45. by PC104 bus interface, to store control logic, send reading command, judge that whether read register is readable, if readable, continue, otherwise repeat judgement until readable;
S46. Frame PC104 bus interface being sent is written in data file; Reading state word first, according to the length of status word specified data frame, and is written to status word in data file; Byte-by-byte reading out data content frame afterwards, and be written in data file;
If S47. current time is pass by the default time interval apart from the creation-time of data file, close data file, and jump to step S42, otherwise jump to step S44.
Further, when carrying out step S4, by the device file list under scan operation system/dev file, detect the connection state of USB2.0 interface, when the connection of USB memory device having been detected, the data file on memory cell is copied in USB memory device.
In sum, by the present invention can record with store M VB network on the Frame of physical layer transmission, thereby can provide the Data support of bottom more for analyzing train operation and failure condition; Meanwhile, because the present invention can detect USB memory device automatically, connect and data file is copied to wherein, therefore thering is higher convenience and dirigibility.
Above embodiment is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification, therefore all technical schemes that are equal to also belong to protection category of the present invention.
Claims (10)
1. for recording a pen recorder for MVB networked physics layer Frame, it is characterized in that, comprise MVB network controller board and industrial control computer mainboard;
Described MVB network controller board comprises physical firmware and controls the local firmware that described physical firmware completes the Frame collection of MVB networked physics layer and memory function;
Described industrial control computer mainboard is connected with described MVB network controller board by industrial-controlled general line, for extract and record the MVB networked physics layer Frame of described physical firmware collection and storage by described local firmware.
2. pen recorder according to claim 1, is characterized in that, described industrial control computer mainboard is the embedded x86 industrial control computer of PC104 mainboard, and described industrial-controlled general line is PC104 control bus.
3. pen recorder according to claim 2, it is characterized in that, described physical firmware be take FPGA circuit as core, also comprises ARM chip, communication storer, PC104 bus interface, the MVB data transmission interface being connected with described FPGA circuit respectively and the flash memory being connected with described ARM chip.
4. pen recorder according to claim 3, is characterized in that, described local firmware comprises MVB bus receiver, redundant line steering logic, store control logic, internal bus and PC104 bus interface; Described store control logic is connected with MVB bus receiver with redundancy control logic successively by internal bus on the one hand, is connected on the other hand by described PC104 bus interface with described industrial control computer mainboard; Described MVB bus receiver comprises the first receiver and the second receiver.
5. according to the pen recorder described in claim 2-4 any one, it is characterized in that, the embedded x86 industrial control computer of described PC104 mainboard comprises x86 central processing unit and the memory cell, PC104 bus interface and the USB interface that are connected with described x86 central processing unit respectively.
The pen recorder of basis as described in claim 1-5 any one realize for recording a recording method for MVB networked physics layer Frame, it is characterized in that, comprise step:
S1.MVB bus receiver resolves to Frame by the electric signal receiving and is stored in communication storer by store control logic;
S2. the central processing unit of industrial control computer mainboard by industrial-controlled general line to industrial-controlled general line interface sending controling instruction;
S3. industrial-controlled general line interface is sent to industrial control computer mainboard according to the steering order control store steering logic receiving by the Frame in communication storer;
S4. industrial control computer mainboard is resolved the Frame receiving be written in the data file being kept on memory cell.
7. recording method according to claim 6, it is characterized in that, described steering order comprises and emptying in communication storer for the flush instructions of the fifo queue of store frames of data and for controlling the reading command that reads the Frame of head of the queue storage from described fifo queue.
8. recording method according to claim 7, is characterized in that, described step S1 further comprises:
S11. the first receiver and the second receiver are monitored all Frames that MVB link receives MVB networked physics layer simultaneously;
S12. the Frame informix that redundant line steering logic receives according to described the first receiver and the second receiver judge and selects a receiver that reliability is higher as trust receiver, and by internal bus to store control logic transfer control signal;
S13. described store control logic completes and Frame is stored into the function of fifo queue from trusting receiver according to the control signal receiving on the one hand, receives on the one hand steering order from PC104 bus interface and completes Frame and from fifo queue, read the function of PC104 bus interface;
S14. described PC104 bus interface receives the steering order of the embedded x86 industrial control computer of PC104 mainboard and is sent to described store control logic, the Frame reading is passed to industrial control computer mainboard simultaneously.
9. recording method according to claim 8, is characterized in that, described step S4 comprises:
S41. by PC104 bus interface, to store control logic, send flush instructions, fifo queue is cleared;
S42. the residual memory space of detection of stored device unit, if residual memory space, lower than default threshold value, is deleted writing time early than the data file of preset expiration time;
S43. on memory cell, create new data file, and record creation-time;
S44. judge whether can write, as write, continue if writing register, otherwise repeat judgement until can write;
S45. by PC104 bus interface, to store control logic, send reading command, judge that whether read register is readable, if readable, continue, otherwise repeat judgement until readable;
S46. Frame PC104 bus interface being sent is written in data file;
If S47. current time is pass by the default time interval apart from the creation-time of data file, close data file, and jump to step S42, otherwise jump to step S44.
10. recording method according to claim 9, is characterized in that, described step S4 also comprises:
The connection state of monitoring USB interface, when having monitored the connection of USB memory device, copies to the data file on memory cell in described USB memory device.
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| CN103558813B (en) | 2016-04-20 |
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