CN104967482B - Multichannel IO synchronous control systems and method based on fiber optic communication - Google Patents
Multichannel IO synchronous control systems and method based on fiber optic communication Download PDFInfo
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Abstract
The present invention relates to industrial control field, a kind of multichannel IO synchronous control systems and method based on fiber optic communication are provided, the problem of to solve not high current IO synchronous control systems synchronization accuracy and weaker antijamming capability, the system includes distribution module, PC and I/O control module.Technical scheme proposed by the present invention reduces synchronous error and strong antijamming capability.
Description
Technical field
The present invention relates to industrial control field, more particularly to a kind of multichannel IO synchronous control systems based on fiber optic communication
And method.
Background technology
In fields such as Radar Signal Processing, image procossing and mobile communication, complete the collection of any one signal, processing,
Storage, control and playback, are required for carrying out the operation such as data transfer, exchange, synchronization of correlation, mesh between multiple system or equipments
Before, it is general that IO Synchronization Controls are realized using PLC control system, but when using PLC control system progress IO Synchronization Controls, IO
The precision of Synchronization Control is not high, and in industrial circle, control system is typically subject to space radiation, outer lead, internal electromagnetism
The interference of these three signals, because PLC synchronous control systems are typically attached by shielded cable, therefore to electromagnetic radiation
Shield effectiveness is bad, and antijamming capability is weaker.
The content of the invention
【The technical problem to be solved】
It is an object of the invention to provide a kind of multichannel IO synchronous control systems based on fiber optic communication and method, to solve
In industrial circle, current IO synchronous control systems synchronization accuracy is not high and the problem of weaker antijamming capability.
【Technical scheme】
The present invention is achieved by the following technical solutions.
Present invention firstly relates to a kind of multichannel IO synchronous control systems based on fiber optic communication, including control end, distribution
Module and at least one I/O control module, the control end are communicated to connect with distribution module,
The distribution module includes the first FPGA unit and at least one first fiber port, first fiber port with
First FPGA unit is connected, and it includes being used for the first optical fiber receiver-transmitter module of synchronizing clock signals output and for data transmit-receive
Second optical fiber receiver-transmitter module；
The I/O control module includes the second FPGA unit, data-interface, the second fiber port, the data-interface, the
Two fiber ports are connected with the second FPGA unit, and second fiber port includes being used for the synchronizing clock signals are received the 3rd
Optical fiber receiver-transmitter module and the 4th optical fiber receiver-transmitter module for data transmit-receive；
First optical fiber receiver-transmitter module of first fiber port and the 3rd optical fiber receiver-transmitter module of the second fiber port are logical
Cross the connection of the first optical fiber, the second optical fiber receiver-transmitter module of first fiber port and the 4th optical fiber transceiving of the second fiber port
Module is connected by the second optical fiber.
As a preferred embodiment, the first FPGA unit of the distribution module include synchronised clock subelement and
Data forwarding subelement,
The synchronised clock subelement is configured to：Generation synchronizing clock signals simultaneously send the synchronizing clock signals to IO
Control module,
The data forwarding subelement is configured to：Receive the packet that control end is sent, the port in packet
The packet number is forwarded to the I/O control module of corresponding with port numbers the first fiber port connection, the packet is at least wrapped
Include port numbers, time interval information and IO control information；
Receive time interval information and IO control information that I/O control module sends and by the time interval information received
Control is forwarded to IO control information and the port numbers for receiving the time interval information and the first fiber port of IO control information
End processed.
As another preferred embodiment, the I/O control module also includes the storage being connected with the second FPGA unit
Unit, second FPGA unit is configured to：
The state of gathered data interface obtains IO control information and kept for the time of this IO control information, by what is collected
IO control information and time interval information send to distribution module or protect the IO control information and time interval information that collect
Deposit to memory cell and again send the IO control information and time interval information that collect to distribution module；
The packet and synchronizing clock signals of distribution module forwarding are received, using synchronizing clock signals as clock reference, according to
The time interval information of packet simultaneously sets the state of data-interface, or data are preserved according to the IO control information of packet
To memory cell, using synchronizing clock signals as clock reference, according to the time interval information of packet and according to packet
IO control information sets the state of data-interface successively.
As another preferred embodiment, the FIFO that second FPGA unit also includes being connected with memory cell is mono-
Member, the I/O control module is further configured to：When obtaining time interval information and IO control information from memory cell, it will get
Time interval information and IO control information preserve to cell fifo.
As another preferred embodiment, the data-interface includes TTL interfaces, the TTL drives that input and output are multiplexed
Dynamic circuit, the TTL drive circuits are connected with TTL interfaces and the second FPGA unit respectively.
As another preferred embodiment, the distribution module is provided with the RJ45 being connected with the first FPGA unit and connect
Mouthful, the first FPGA unit of the control end and distribution module is connected by RJ45 interfaces.
As another preferred embodiment, the distribution module also includes RS422 interfaces and/or GPIO interface, institute
RS422 interfaces and/or GPIO interface is stated to be connected with the first FPGA unit.
As another preferred embodiment, the control end is PC, and the memory cell is DDR2 memory cell.
The invention further relates to a kind of multichannel IO synchronisation control means based on fiber optic communication, including data distributing flow and
Data upload flow,
The data distributing flow includes：
Control end, which is transmitted packets to, comprises at least port numbers, time interval information, IO in distribution module, the packet
Control information；
Distribution module receives the packet that control end is sent, and generates synchronizing clock signals, and synchronizing clock signals are passed through
First optical fiber receiver-transmitter module of the first fiber port corresponding with port numbers is sent to I/O control module, and by the data received
Bag is sent to I/O control module by the second optical fiber receiver-transmitter module of the first fiber port corresponding with port numbers；I/O control module
Packet and synchronizing clock signals that distribution module is sent are received, using synchronizing clock signals as clock reference, according to packet
Time interval information simultaneously sets the state of data-interface successively according to the IO control information of packet, or in packet is preserved
IO control information and time interval information after, using synchronizing clock signals as clock reference, according to the time interval of packet believe
Cease and set the state of data-interface successively according to the IO control information of packet,
The data, which upload flow, to be included：
The state of I/O control module gathered data interface obtains IO control information and kept for the time of this IO control information,
By the IO control information collected and time interval information by the 4th optical fiber receiver-transmitter module of the second fiber port send to point
Hair module preserves the IO collected controls the IO control information and time interval information that collect to memory cell again
Information and time interval information are sent to distribution module by the 4th optical fiber receiver-transmitter module of the second fiber port；
Distribution module receives the IO control information and time interval information of I/O control module transmission and controls the IO received
Information processed, time interval information and receive the port numbers of the first fiber port of the IO control information and be forwarded to control end.
As a preferred embodiment, also including：I/O control module from memory cell obtain time interval information and
During IO control information, the time interval information got and IO control information are preserved to cell fifo.
【Beneficial effect】
Technical scheme proposed by the present invention has the advantages that：
(1) in the IO synchronous control systems that the present invention is provided, distribution module is connected with I/O control module by optical fiber, speed
Hurry up, strong antijamming capability.
(2) present invention carries out data distribution using distribution module, and the port of distribution module, I/O control module is used
The design method that data are separated with synchronised clock, reduces synchronous error.
Brief description of the drawings
Fig. 1 is the structural frames for the multichannel IO synchronous control systems based on fiber optic communication that embodiments of the invention one are provided
Figure.
Fig. 2 is the structured flowchart for the distribution module that embodiments of the invention one are provided.
Fig. 3 is the structured flowchart for the I/O control module that embodiments of the invention one are provided.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, to the specific of the present invention
Embodiment carries out clear, complete description, it is clear that described embodiment is a part of embodiment of the present invention, rather than
Whole embodiments, nor limitation of the present invention.Based on embodiments of the invention, those of ordinary skill in the art are not paying
The every other embodiment obtained under the premise of creative work, belongs to protection scope of the present invention.
Embodiment one
Embodiment one provides a kind of multichannel IO synchronous control systems based on fiber optic communication, as shown in figure 1, the system bag
Distribution module 1, PC 3 and I/O control module 2 are included, the modules for constituting system are described in detail separately below.
As shown in Fig. 2 distribution module 1 include FPGA unit 11, RJ45 interfaces 12, RS422 interfaces 13, GPIO interface 14,
RAM memory 16 and 32 fiber ports, RJ45 interfaces 12, RS422 interfaces 13, GPIO interface 14, RAM memory 16 and 32
Fiber port is connected with FPGA unit 11.32 fiber ports have identical circuit principle structure, are with fiber port 15
Example is illustrated, and fiber port 15 includes being used for the optical fiber receiver-transmitter module of synchronizing clock signals output and the light for data transmit-receive
Fine transceiver module, specifically, 155Mbps LVPECL level lists is used for the optical fiber receiver-transmitter module that synchronizing clock signals are exported
Fine two-way photoelectricity receiver-transmitter integrated module, the optical fiber receiver-transmitter module for data transmit-receive uses the fiber optical transceiver that Avago is produced, and passes
Defeated speed is 3.125Gb/s, the transmission-receiving function for realizing data.RJ45 interfaces 12 are used for and the network service of PC 3, RS422
Interface 13 is synchronous with other systems for whole control system, and GPIO interface 14 is used for external played/collection and enables signal input.
As shown in figure 3, I/O control module 2 includes FPGA unit 21, data-interface, fiber port 22, DDR2 memory cell
23rd, cell fifo, data-interface, fiber port 22, DDR2 memory cell 23 are connected with FPGA unit 21, specifically, data
Interface include input and output be multiplexed TTL interfaces 24, TTL drive circuits 25, TTL drive circuits 25 respectively with TTL interfaces 24 and
FPGA unit 21 is connected, in the present embodiment, and TTL interfaces 24 are the Transistor-Transistor Logic level input/output interface of 160.Fiber port 22 with
The circuit theory of fiber port 15 is identical, and it includes being used for the optical fiber receiver-transmitter module of synchronizing clock signals reception and received for data
The optical fiber receiver-transmitter module of hair, specifically, 155Mbps LVPECL is used for the optical fiber receiver-transmitter module that synchronizing clock signals are received
Level single fiber bi-directional photoelectricity receiver-transmitter integrated module, the optical fiber receiver-transmitter module for data transmit-receive is received using the Avago optical fiber produced
Device is sent out, transmission speed is 3.125Gb/s, the transmission-receiving function for realizing data.The capacity of DDR2 memory cell 23 is 2Gb, is used for
Store the data downloaded or the data collected.Because the distribution module 1 of the present embodiment has 32 fiber ports, thus it is maximum
32 I/O control modules are supported to be connected thereto.
Distribution module 1 is connected with each I/O control module by optical fiber.Specifically, with I/O control module 2 and distribution module 1
Fiber port 15 connect exemplified by illustrate, fiber port 15 be used for synchronizing clock signals export optical fiber receiver-transmitter module with
The optical fiber receiver-transmitter module for being used for synchronizing clock signals reception of fiber port 22 passes through optical fiber at a slow speed and connected, the use of fiber port 15
Pass through fast fibre in the optical fiber receiver-transmitter module of data transmit-receive and the optical fiber receiver-transmitter module for data transmit-receive of fiber port 22
Connection.
In the present embodiment, the FPGA unit 11 of distribution module 1 includes synchronised clock subelement, data forwarding subelement.
Synchronised clock subelement is configured to：Generation synchronizing clock signals simultaneously send the synchronizing clock signals to IO controls
Module 2.
Data forwarding subelement is configured to：The packet that PC 3 is sent is received, the port numbers in packet should
Packet is forwarded to the I/O control module of fiber port connection corresponding with port numbers, and packet includes port numbers, time interval
Information and IO control information, port numbers here refer to the numbering of the fiber port of distribution module 1；Receive I/O control module hair
The IO control information and time interval information sent simultaneously by the IO control information received, time interval information and receive IO controls
The port numbers of the fiber port of information processed are forwarded to PC 3.It is to be appreciated that time interval here refers to that data-interface is kept
The time span of current IO control information.
In the present embodiment, I/O control module is further configured to：Time interval information and IO control letters are obtained from memory cell
During breath, the time interval information got and IO control information are preserved to cell fifo.
In the present embodiment, FPGA unit 21 is configured to：
The state of collection TTL interfaces 24 obtains IO control information and TTL interfaces 24 keep current IO control information when
Between length, the time span is time interval information, and the IO control information and time interval information that collect are packaged into number
Sent according to bag to distribution module 1 or preserve the IO control information and time interval information that collect to DDR2 memory cell 23
The IO control information and time interval information that collect are sent to distribution module 1 again；
Packet and synchronizing clock signals that distribution module 1 is sent are received, using synchronizing clock signals as clock reference, according to
The state of IO control information and time interval information setting the TTL interfaces 24 of packet, or the IO controls in packet is preserved
After information processed, using synchronizing clock signals as clock reference, TTL is set according to the IO control information and time interval information of packet
The state of interface 24.
The system provided using embodiment one realizes that the method for multichannel IO Synchronization Controls may be referred to following specific methods
Embodiment.
Embodiment two
Embodiment two provides a kind of multichannel IO synchronisation control means based on fiber optic communication, and this method uses embodiment one
In system realize that the system can be operated in high speed processing pattern and real-time tupe.
(1) high speed processing pattern
Under high speed processing pattern, the IO synchronisation control means includes data distributing flow and data and uploads flow, below with
I/O control module 2 exemplified by the Synchronization Control of distribution module 1 with illustrating.
(1) data distributing flow
Data distributing flow includes：
PC 3 transmit packets in distribution module 1, packet comprising frame head, packet number, port numbers, between the time
Every in the IO control information with 160, the present embodiment, port numbers are the optical fiber end being connected with I/O control module 2 in distribution module
The port numbers of mouth；
Distribution module 1 receives the packet that PC 3 is sent, and generates synchronizing clock signals, synchronizing clock signals is passed through slow
Fast optical fiber is sent to I/O control module 2, and the packet received is sent to I/O control module 2 by fast fibre, specifically
Ground, synchronizing clock signals are sent to I/O control module by the optical fiber receiver-transmitter module of fiber port corresponding with port numbers, and
The packet received is sent to I/O control module by the optical fiber receiver-transmitter module of fiber port corresponding with port numbers；
I/O control module 2 receives the packet and synchronizing clock signals that distribution module 1 is sent, and preserves the IO controls in packet
Information processed and time interval information, using synchronizing clock signals as clock reference, according to the IO control information of packet and between the time
Every information setting TTL interfaces 24 state, it is necessary to which explanation, time interval information is just to maintain the shape of current TTL interfaces 24
The time of state, when the retention time exceeding the time interval in time interval information, set TTL with next group of IO control information and connect
The state of mouth 24.Specifically, after I/O control module 2 finishes packet storage, TTL interfaces 24 can be entered by PC 3
Row is played, and the broadcasting of TTL interfaces 24 can also be controlled by the equipment being connected with GPIO interface 14.
(2) data upload flow
Data, which upload flow, to be included：
160 Transistor-Transistor Logic level states of the collection TTL of I/O control module 2 interfaces 24 obtain IO control information, by the IO collected
The retention time of control information and current IO control information is preserved to DDR2 memory cell 23, then the IO collected is controlled into letter
Breath and transmission are to distribution module 1, and the retention time of current IO control information is time interval information；
Distribution module receives IO control information and the time interval information that I/O control module is sent, and the IO received is controlled
Information processed, time interval information and corresponding port numbers are forwarded to control end.
(2) real-time tupe
Under real-time tupe, the IO synchronisation control means equally includes data distributing flow and data upload flow, under
Face is illustrated by taking Synchronization Control of the I/O control module 2 with distribution module 1 as an example.
(1) data distributing flow
Data distributing flow includes：
PC 3, which is transmitted packets to, includes frame head, packet number, port numbers, between the time in distribution module 1, packet
Every information and the IO control information of 160；
Distribution module 1 receives the packet that PC 3 is sent, and generates synchronizing clock signals, synchronizing clock signals is passed through slow
Fast optical fiber is sent to I/O control module 2, and the packet received is sent to I/O control module 2 by fast fibre；
I/O control module 2 receive distribution module 1 forward packet and synchronizing clock signals, using synchronizing clock signals as when
Clock benchmark, the state of TTL interfaces 24 is set according to the IO control information and time interval information of packet.Specifically, when IO is controlled
Molding block 2 is received after packet, and directly TTL interfaces 24 are played out.
(2) data upload flow
Data, which upload flow, to be included：
160 Transistor-Transistor Logic level states of the collection TTL of I/O control module 2 interfaces 24 obtain IO control information and time interval letter
Breath, the IO control information and time interval information that collect are sent to distribution module 1；
Distribution module 1 receives the IO control information of the transmission of I/O control module 2 and by the IO control information received, between the time
PC 3 is forwarded to every information and corresponding port numbers.
As can be seen from the above embodiments, in IO synchronous control systems provided in an embodiment of the present invention, distribution module and IO
Control module is connected by optical fiber, and speed is fast, strong antijamming capability；In addition, the embodiment of the present invention enters line number using distribution module
According to distribution, the design method that distribution module, the port of I/O control module are separated using data and synchronised clock is reduced same
Walk error.
Claims (10)
1. a kind of multichannel IO synchronous control systems based on fiber optic communication, it is characterised in that including control end, distribution module and
At least one I/O control module, the control end is communicated to connect with distribution module,
The distribution module includes the first FPGA unit and at least one first fiber port, first fiber port and first
FPGA unit is connected, and it includes second for the first optical fiber receiver-transmitter module of synchronizing clock signals output and for data transmit-receive
Optical fiber receiver-transmitter module；
The I/O control module includes the second FPGA unit, data-interface, the second fiber port, the data-interface, the second light
Fine port is connected with the second FPGA unit, and second fiber port includes being used for the 3rd optical fiber that synchronizing clock signals are received
Transceiver module and the 4th optical fiber receiver-transmitter module for data transmit-receive；
First optical fiber receiver-transmitter module of first fiber port and the 3rd optical fiber receiver-transmitter module of the second fiber port pass through
One optical fiber is connected, the second optical fiber receiver-transmitter module of first fiber port and the 4th optical fiber receiver-transmitter module of the second fiber port
Connected by the second optical fiber.
2. the multichannel IO synchronous control systems according to claim 1 based on fiber optic communication, it is characterised in that described point
Sending out the first FPGA unit of module includes synchronised clock subelement and data forwarding subelement,
The synchronised clock subelement is configured to：Generation synchronizing clock signals simultaneously send the synchronizing clock signals to IO controls
Module,
The data forwarding subelement is configured to：The packet that control end is sent is received, the port numbers in packet will
The packet is forwarded to the I/O control module of the first fiber port connection corresponding with port numbers, and the packet at least includes end
Slogan, time interval information and IO control information；
Receive time interval information and IO control information that I/O control module sends and by the time interval information received and IO
Control information and receive the time interval information and the port numbers of the first fiber port of IO control information are forwarded to control end.
3. the multichannel IO synchronous control systems according to claim 2 based on fiber optic communication, it is characterised in that the IO
Control module also includes the memory cell being connected with the second FPGA unit, and second FPGA unit is configured to：
The state of gathered data interface obtains IO control information and kept for the time of this IO control information, and the IO collected is controlled
Information processed and time interval information send to distribution module or by the IO control information and time interval information that collect preserve to
The IO control information and time interval information that collect are sent to distribution module again after memory cell；
The packet and synchronizing clock signals of distribution module forwarding are received, using synchronizing clock signals as clock reference, according to data
The time interval information of bag simultaneously sets the state of data-interface, or data are preserved to depositing according to the IO control information of packet
After storage unit, using synchronizing clock signals as clock reference, controlled according to the time interval information of packet and according to the IO of packet
Information processed sets the state of data-interface successively.
4. the multichannel IO synchronous control systems according to claim 3 based on fiber optic communication, it is characterised in that described
Two FPGA units also include the cell fifo being connected with memory cell, and the I/O control module is further configured to：From memory cell
When obtaining time interval information and IO control information, the time interval information got and IO control information are preserved mono- to FIFO
Member.
5. the multichannel IO synchronous control systems according to claim 1 based on fiber optic communication, it is characterised in that the number
Include TTL interfaces, the TTL drive circuits that input and output are multiplexed according to interface, the TTL drive circuits respectively with TTL interfaces and the
Two FPGA units are connected.
6. according to any described multichannel IO synchronous control systems based on fiber optic communication in claim 1 to 5, its feature exists
It is provided with the RJ45 interfaces being connected with the first FPGA unit in the distribution module, the first of the control end and distribution module
FPGA unit is connected by RJ45 interfaces.
7. according to any described multichannel IO synchronous control systems based on fiber optic communication in claim 1 to 5, its feature exists
Also include RS422 interfaces and/or GPIO interface in the distribution module, the RS422 interfaces and/or GPIO interface are with first
FPGA unit is connected.
8. the multichannel IO synchronous control systems based on fiber optic communication according to claim 3 or 4, it is characterised in that described
Control end is PC, and the memory cell is DDR2 memory cell.
9. a kind of multichannel IO synchronisation control means, it is characterised in that upload flow including data distributing flow and data,
The data distributing flow includes：
Control end, which is transmitted packets in distribution module, the packet, comprises at least port numbers, time interval information, IO controls
Information；
Distribution module receive control end send packet, generate synchronizing clock signals, and by synchronizing clock signals by with end
First optical fiber receiver-transmitter module of corresponding first fiber port of slogan is sent to I/O control module, and the packet received is led to
The second optical fiber receiver-transmitter module for crossing the first fiber port corresponding with port numbers is sent to I/O control module；I/O control module is received
Packet and synchronizing clock signals that distribution module is sent, using synchronizing clock signals as clock reference, according to the time of packet
Interval information simultaneously sets the state of data-interface, or the IO in packet is preserved successively according to the IO control information of packet
After control information and time interval information, using synchronizing clock signals as clock reference, according to the time interval information of packet simultaneously
The state of data-interface is set successively according to the IO control information of packet,
The data, which upload flow, to be included：
The state of I/O control module gathered data interface obtains IO control information and kept for the time of this IO control information, will adopt
The IO control information and time interval information collected is sent to distribution mould by the 4th optical fiber receiver-transmitter module of the second fiber port
Block preserves the IO control information collected the IO control information and time interval information that collect to memory cell again
Sent with time interval information by the 4th optical fiber receiver-transmitter module of the second fiber port to distribution module；
Distribution module receives the IO control information and time interval information of I/O control module transmission and controls the IO received to believe
Breath, time interval information and receive the port numbers of the first fiber port of the IO control information and be forwarded to control end.
10. multichannel IO synchronisation control means according to claim 9, it is characterised in that also include：I/O control module from
When memory cell obtains time interval information and IO control information, the time interval information got and IO control information are preserved
To cell fifo.
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| CN110381272B (en) * | 2019-08-22 | 2022-05-13 | 睿镞科技(北京)有限责任公司 | Image sensor combination system and device for generating single and compound visual field images |
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