阅读说明：本技术 一种基于blvds信号中继装置的控制系统 (Control system based on BLVDS signal relay device ) 是由 陆卫军 杨振国 崔莺凡 周位强 杜显彬 于 2021-07-28 设计创作，主要内容包括：本发明公开了一种基于BLVDS信号中继装置的控制系统,包括：远程通信总线主站、远程通信总线、基于可编程元器件的BLVDS信号中继装置、远程机架通信总线和远程机架；其中：远程通信总线主站通过远程通信总线与基于可编程元器件的BLVDS信号中继装置相连；基于可编程元器件的BLVDS信号中继装置通过远程机架通信总线与远程机架相连；基于可编程元器件的BLVDS信号中继装置用于对总线信号进行转发和放大。本发明能够利用可编程元器件的可编程性,减少通信总线物理层的复杂度,支持多电平配置且减少BLVDS驱动器新型号的引入和后期维护成本。(The invention discloses a control system based on a BLVDS signal relay device, which comprises: the remote communication system comprises a remote communication bus master station, a remote communication bus, a BLVDS signal relay device based on programmable components, a remote rack communication bus and a remote rack; wherein: the remote communication bus master station is connected with the BLVDS signal relay device based on the programmable component through a remote communication bus; the BLVDS signal relay device based on the programmable component is connected with the remote rack through a remote rack communication bus; the BLVDS signal relay device based on the programmable components is used for forwarding and amplifying bus signals. The invention can utilize the programmability of the programmable element, reduce the complexity of the physical layer of the communication bus, support the multi-level configuration and reduce the introduction and later maintenance cost of the new model of the BLVDS driver.)

1. A control system for a BLVDS signal relay device, comprising: the remote communication system comprises a remote communication bus master station, a remote communication bus, a BLVDS signal relay device based on programmable components, a remote rack communication bus and a remote rack; wherein:

the remote communication bus master station is connected with the BLVDS signal relay device based on the programmable component through the remote communication bus;

the BLVDS signal relay device based on the programmable component is connected with the remote rack through the remote rack communication bus;

the BLVDS signal relay device based on the programmable components is used for forwarding and amplifying bus signals.

2. The system of claim 1, wherein the programmable component based BLVDS signal repeating apparatus comprises: the BLVDS remote interface, the input/output logic judgment module and the BLVDS local interface; wherein:

one end of the BLVDS remote interface is connected with the remote communication bus master station through the remote communication bus, and the other end of the BLVDS remote interface is connected with the input and output logic judgment module;

one end of the BLVDS local interface is connected with the remote rack through the remote rack communication bus, and the other end of the BLVDS local interface is connected with the input/output logic judgment module.

3. The system of claim 2, wherein the programmable component based BLVDS signal repeating apparatus further comprises: a clock frequency division/multiplication module; wherein:

the clock frequency division/multiplication module is respectively connected with the BLVDS remote interface, the input/output logic judgment module and the BLVDS local interface.

4. The system of claim 3, wherein the remote communication bus master station comprises: a BLVDS interface, wherein:

the BLVDS interface is connected with the BLVDS remote interface through the remote communication bus.

5. The system of claim 1, wherein the programmable component based BLVDS signal repeating apparatus is a complex programmable logic device based BLVDS signal repeating apparatus.

6. The system of claim 1, wherein the programmable component based BLVDS signal relay device is a field programmable gate array based BLVDS signal relay device.

7. The system of claim 1, wherein the programmable component based BLVDS signal relay device is a system-on-chip based BLVDS signal relay device.

Technical Field

The invention relates to the technical field of industrial control systems, in particular to a control system based on a BLVDS (Bus Low-Voltage Differential Signaling) signal relay device.

Background

At present, in an industrial control system, with the increasing of the IO scale and the continuous improvement of a system diagnosis mechanism, a communication bus of the control system tends to be "high-speed", and in a control system using BLVDS as a bus driving interface, in order to solve the problem of signal loss of a BLVDS signal in long-distance transmission, an existing control system may adopt a BLVDS driver to implement functions of BLVDS signal amplification and impedance matching on a remote rack.

In the prior art, a BLVDS driver is used to implement a signal enhancement function of the BLVDS, the BLVDS supports half-duplex communication as a bus communication interface, a data flow direction of the BLVDS needs to be controlled by an independent pin, and the individual BLVDS driver only supports a single power domain, and for BLVDS signals required by different power domains, components of different signals need to be introduced.

Therefore, how to omit the data flow direction control signal of the BLVDS, reduce the complexity of the physical layer of the communication bus, support the multi-level configuration, and reduce the introduction and post-maintenance costs of the new model of the BLVDS driver is a problem to be solved urgently.

Disclosure of Invention

In view of this, the present invention provides a control system based on a BLVDS signal relay device, which can utilize programmability of programmable components, reduce complexity of a physical layer of a communication bus, support multi-level configuration, and reduce introduction and post-maintenance costs of a new model of a BLVDS driver.

The invention provides a control system based on a BLVDS signal relay device, which comprises: the remote communication system comprises a remote communication bus master station, a remote communication bus, a BLVDS signal relay device based on programmable components, a remote rack communication bus and a remote rack; wherein:

the remote communication bus master station is connected with the BLVDS signal relay device based on the programmable component through the remote communication bus;

the BLVDS signal relay device based on the programmable component is connected with the remote rack through the remote rack communication bus;

the BLVDS signal relay device based on the programmable components is used for forwarding and amplifying bus signals.

Preferably, the programmable component-based BLVDS signal relaying apparatus includes: the BLVDS remote interface, the input/output logic judgment module and the BLVDS local interface; wherein:

one end of the BLVDS remote interface is connected with the remote communication bus master station through the remote communication bus, and the other end of the BLVDS remote interface is connected with the input and output logic judgment module;

one end of the BLVDS local interface is connected with the remote rack through the remote rack communication bus, and the other end of the BLVDS local interface is connected with the input/output logic judgment module.

Preferably, the programmable component-based BLVDS signal relaying apparatus further includes: a clock frequency division/multiplication module; wherein:

the clock frequency division/multiplication module is respectively connected with the BLVDS remote interface, the input/output logic judgment module and the BLVDS local interface.

Preferably, the remote communication bus master station comprises: a BLVDS interface, wherein:

the BLVDS interface is connected with the BLVDS remote interface through the remote communication bus.

Preferably, the BLVDS signal relay device based on the programmable device is a BLVDS signal relay device based on a complex programmable logic device.

Preferably, the programmable component-based BLVDS signal relay device is a field programmable gate array-based BLVDS signal relay device.

Preferably, the programmable component-based BLVDS signal relay device is a system-on-chip-based BLVDS signal relay device.

In summary, the present invention discloses a control system based on a BLVDS signal relay device, including: the remote communication system comprises a remote communication bus master station, a remote communication bus, a BLVDS signal relay device based on programmable components, a remote rack communication bus and a remote rack; wherein: the remote communication bus master station is connected with the BLVDS signal relay device through a remote communication bus; the BLVDS signal relay device is connected with the remote rack through a remote rack communication bus; the BLVDS signal relay device is used for forwarding and amplifying the bus signals. The invention can utilize the programmability of the programmable components of the BLVDS signal relay device based on the programmable components, reduce the complexity of a physical layer of a communication bus, support multi-level configuration and reduce the introduction and later maintenance cost of a new model of a BLVDS driver.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment 1 of a control system based on a BLVDS signal relay device disclosed in the present invention;

fig. 2 is a schematic structural diagram of an embodiment 2 of a control system based on a BLVDS signal relay device disclosed in the present invention;

fig. 3 is a schematic structural diagram of an embodiment 3 of a control system based on a BLVDS signal relay device disclosed in the present invention;

fig. 4 is a schematic structural diagram of an embodiment 4 of a control system based on a BLVDS signal relay device disclosed in the present invention;

fig. 5 is a schematic structural diagram of an embodiment 5 of a control system based on a BLVDS signal relay device disclosed in the present invention;

fig. 6 is a schematic structural diagram of an embodiment 6 of a control system based on a BLVDS signal relay device disclosed in the present invention;

fig. 7 is a schematic structural diagram of an embodiment 7 of a control system based on a BLVDS signal relay device disclosed in the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, a schematic structural diagram of an embodiment 1 of a control system based on a BLVDS signal relay device disclosed in the present invention is shown, where the system may include: a remote communication bus master station 11, a remote communication bus 12, a BLVDS signal relay device 13 based on programmable components, a remote rack communication bus 14 and a remote rack 15; wherein:

the remote communication bus master station 11 is connected with a BLVDS signal relay device based on programmable components through a remote communication bus 12;

the BLVDS signal relay device 13 based on programmable components is connected with a remote rack 15 through a remote rack communication bus 14;

the programmable component based BLVDS signal relay device 13 is used for forwarding and amplifying the bus signal.

The control system based on the BLVDS signal relay device disclosed in the above embodiments is used for the control system to forward and amplify the BLVDS signal on a remote rack. Under certain specific conditions, the remote communication data carrier and the remote rack local communication data carrier may be inconsistent (for example, optical signals are converted into electrical signals), signal types need to be converted again and a matching circuit is added to ensure that the BLVDS signals are always in a state of good signal integrity on the whole communication bus, and on the basis that the designed relay device framework and the programmable components are taken as cores, the accuracy and the reliability of remote communication of the control system are realized through rich logic resources and BLVDS interface resources of the programmable components.

As shown in fig. 2, a schematic structural diagram of an embodiment 2 of a control system based on a BLVDS signal relay device disclosed in the present invention is shown, where the system may include: a remote communication bus master station 21, a remote communication bus 22, a BLVDS signal relay device 23 based on programmable components, a remote rack communication bus 24 and a remote rack 25; wherein: the programmable component based BLVDS signal repeating apparatus 23 includes: a BLVDS remote interface 231, an input/output logic determination module 232, and a BLVDS local interface 233; wherein:

one end of the BLVDS remote interface 231 is connected to the remote communication bus master station 21 through the remote communication bus 22, and the other end of the BLVDS remote interface 231 is connected to the input/output logic determination module 232;

one end of the BLVDS local interface 233 is connected to the remote chassis 25 through the remote chassis communication bus 24, and the other end of the BLVDS local interface 233 is connected to the input/output logic determination module 232.

In the control system based on the BLVDS signal relay device disclosed in the foregoing embodiment, the BLVDS signal relay device 23 based on the programmable component includes: a BLVDS remote interface 231, an input/output logic determination module 232, and a BLVDS local interface 233; the BLVDS remote interface 231 is mainly used for implementing data interaction between the remote rack 25 and the remote communication bus master station 21; the BLVDS local interface 233 mainly realizes communication between the IO module of the remote chassis 25 itself and the BLVDS signal relay device 23 based on the programmable device; the BLVDS implements a half-duplex communication mode, and the data flow direction at a single moment is unidirectional, so the BLVDS signal relay device 23 based on the programmable device needs to be able to judge the validity of the data received by the BLVDS signal relay device 23 based on the programmable device in the current state, and determine whether the data is forwarded according to the judgment result, if the data format is correct, the data is directly forwarded, and if the data format is incorrect, the data is directly discarded; specifically, the input/output logic determining module 232 in the programmable device-based BLVDS signal relay device 23 determines that the length of a command packet sent by the local rack is different from the length of a data packet returned by the remote rack, the programmable device-based BLVDS signal relay device 23 does not need to parse the received and sent data content, but only needs to parse the frame header part data, where 1byte is defined for the data length, if the length of the data is less than 50 bytes, the data is the data that the local rack needs to send to the remote rack, and if the length of the data is greater than 70 bytes, the data is the data that the remote rack needs to send to the local rack; the BLVDS signal relay device 23 based on programmable components will open up a RAM for buffering the transceiving data.

As shown in fig. 3, a schematic structural diagram of an embodiment 3 of a control system based on a BLVDS signal relay device disclosed in the present invention is shown, where the system may include: a remote communication bus master station 31, a remote communication bus 32, a BLVDS signal relay device 33 based on programmable components, a remote rack communication bus 34 and a remote rack 35; wherein: the programmable device based BLVDS signal relay apparatus 33 includes: a BLVDS remote interface 331, an input/output logic judgment module 332, a BLVDS local interface 333, and a clock frequency division/multiplication module 334; wherein:

one end of the BLVDS remote interface 331 is connected to the remote communication bus master station 31 through the remote communication bus 32, and the other end of the BLVDS remote interface 331 is connected to the input/output logic determination module 332;

one end of the BLVDS local interface 333 is connected to the remote chassis 35 through the remote chassis communication bus 34, and the other end of the BLVDS local interface 333 is connected to the input/output logic determination module 332;

the clock frequency dividing/multiplying module 334 is connected to the BLVDS remote interface 331, the input/output logic determining module 332, and the BLVDS local interface 333, respectively.

In the control system based on the BLVDS signal relay apparatus disclosed in the foregoing embodiment, the BLVDS signal relay apparatus 33 based on the programmable device includes: a BLVDS remote interface 331, an input/output logic judgment module 332, a BLVDS local interface 333, and a clock frequency division/multiplication module 334; the BLVDS remote interface 331 is mainly used to implement data interaction between the remote rack 35 and the remote communication bus master station 31; the BLVDS local interface 333 mainly realizes communication between the IO module of the remote chassis 35 itself and the BLVDS signal relay device 33 based on the programmable device; the BLVDS implements a half-duplex communication mode, and the data flow direction at a single moment is unidirectional, so the BLVDS signal relay device 33 based on the programmable device needs to be able to judge the validity of data received by the BLVDS signal relay device 33 based on the programmable device in the current state, and determine whether the data is forwarded according to the judgment result, if the data format is correct, the data is directly forwarded, and if the data format is incorrect, the data is directly discarded; specifically, the input/output logic determination module 332 in the programmable device-based BLVDS signal relay device 33 determines that the length of the command packet sent by the local rack is different from the length of the data packet returned by the remote rack, and the programmable device-based BLVDS signal relay device 33 does not need to parse the received and sent data content, but only needs to parse the frame header part data, where 1byte is defined for the data length, and if the length of the data is less than 50 bytes, the data is the data that the local rack needs to send to the remote rack, and if the length of the data is greater than 70 bytes, the data is the data that the remote rack needs to send to the local rack; the BLVDS signal relay device 33 based on programmable components will open up a RAM for buffering the received and transmitted data.

One of the advantages of implementing the communication bus by using the BLVDS is fast speed, and one of the advantages of the BLVDS signal relay device 33 based on the programmable device is that parallel execution of data can be implemented, so clocks of each module are not completely consistent, 8 times of the communication bus rate is required for operating the BLVDS remote interface 331 and the BLVDS local interface 333 to accurately sample communication frame header data for determining validity of data, and the input/output logic determining module 332 also needs a high-speed clock for reducing communication delay caused by the determining logic. Therefore, on the basis of the above embodiment, the clock frequency division/multiplication module 334 of the self-contained phase-locked loop in the BLVDS signal relay device 33 based on the programmable device is used to realize the frequency multiplication requirement of the operation clock of each module, and the direct use of the high-frequency system clock input is avoided.

As shown in fig. 4, which is a schematic structural diagram of an embodiment 4 of a control system based on a BLVDS signal relay device disclosed in the present invention, the system may include: a remote communication bus master station 41, a remote communication bus 42, a programmable component-based BLVDS signal relay device 43, a remote rack communication bus 44 and a remote rack 45; the remote communication bus master station 41 includes: a BLVDS interface 411; the programmable component based BLVDS signal repeating apparatus 43 includes: a BLVDS remote interface 431, an input/output logic judgment module 432, a BLVDS local interface 433, and a clock frequency division/multiplication module 434; wherein:

one end of the BLVDS remote interface 431 is connected to the BLVDS interface 411 through the remote communication bus 42, and the other end of the BLVDS remote interface 431 is connected to the input/output logic determination module 432;

one end of the BLVDS local interface 433 is connected to the remote chassis 45 through the remote chassis communication bus 44, and the other end of the BLVDS local interface 433 is connected to the input/output logic determination module 432;

the clock frequency dividing/multiplying module 434 is respectively connected to the BLVDS remote interface 431, the input/output logic determining module 432, and the BLVDS local interface 433.

In the control system based on the BLVDS signal relay device disclosed in the foregoing embodiment, the BLVDS signal relay device 43 based on the programmable component includes: a BLVDS remote interface 431, an input/output logic judgment module 432, a BLVDS local interface 433, and a clock frequency division/multiplication module 434; the BLVDS remote interface 431 is mainly used for realizing data interaction between the remote rack 45 and the remote communication bus master station 41; the BLVDS local interface 433 mainly realizes communication between the IO module of the remote chassis 45 itself and the BLVDS signal relay device 43 based on the programmable device; the BLVDS implements a half-duplex communication mode, and the data flow direction at a single moment is unidirectional, so the BLVDS signal relay device 43 based on the programmable device needs to be able to determine the validity of the data received by the BLVDS signal relay device 43 based on the programmable device in the current state, and determine whether the data is forwarded according to the determination result, if the data format is correct, the data is directly forwarded, and if the data format is incorrect, the data is directly discarded; specifically, the input/output logic judgment module 432 in the programmable component based BLVDS signal relay device 43 judges according to the difference between the length of a command packet sent by the local rack and the length of a data packet returned by the remote rack, the programmable component based BLVDS signal relay device 43 does not need to analyze the content of data received and sent, but only needs to analyze the data of the frame header part, wherein 1byte is defined for the data length, if the data is less than 50 bytes, the data is the data to be sent to the remote rack by the local rack, and if the data is greater than 70 bytes, the data is the data to be sent to the local rack by the remote rack; the BLVDS signal relay device 43 based on programmable components will open up a RAM for buffering the transceiving data.

One of the advantages of implementing the communication bus by using the BLVDS is fast speed, and one of the advantages of the BLVDS signal relay device 43 based on the programmable device is that parallel execution of data can be implemented, so clocks of each module are not completely consistent, 8 times of the communication bus rate is required for operating the clocks of the BLVDS remote interface 431 and the BLVDS local interface 433 so as to be able to accurately sample communication frame header data for determining validity of data, and the input/output logic determining module 432 also needs a high-speed clock for reducing communication delay caused by the determining logic. Therefore, on the basis of the above embodiment, the clock frequency division/multiplication module 434 of the self-contained phase-locked loop in the BLVDS signal relay device 43 based on the programmable device is used to realize the frequency multiplication requirement of the operation clock of each module, and the direct use of the high-frequency system clock input is avoided.

As shown in fig. 5, a schematic structural diagram of an embodiment 5 of a control system based on a BLVDS signal relay device disclosed in the present invention is shown, where the system may include: a remote communication bus master station 51, a remote communication bus 52, a complex programmable logic device-based BLVDS signal relay 53, a remote rack communication bus 54 and a remote rack 55; wherein:

the remote communication bus master station 51 is connected with a BLVDS signal relay device 53 based on a complex programmable logic device through a remote communication bus 52;

the complex programmable logic device based BLVDS signal relay 53 is connected to the remote chassis 55 through the remote chassis communication bus 54;

the complex programmable logic device based BLVDS signal relay 53 is used to forward and amplify the bus signal.

The control system based on the BLVDS signal relay device disclosed in the above embodiments is used for the control system to forward and amplify the BLVDS signal on a remote rack. Under certain specific conditions, the remote communication data carrier and the remote rack local communication data carrier may be inconsistent (for example, optical signals are converted into electrical signals), signal types need to be converted again and a matching circuit is added to ensure that the BLVDS signals are always in a state of good signal integrity on the whole communication bus, and the accuracy and reliability of remote communication of the control system are realized through rich Logic resources of the CPLD and BLVDS interface resources on the basis that a designed relay Device architecture and the CPLD (Complex Programmable Logic Device) are taken as a core.

As shown in fig. 6, a schematic structural diagram of an embodiment 6 of a control system based on a BLVDS signal relay device disclosed in the present invention is shown, where the system may include: a remote communication bus master station 61, a remote communication bus 62, a field programmable gate array based BLVDS signal relay 63, a remote rack communication bus 64 and a remote rack 65; wherein:

the remote communication bus master station 61 is connected with a BLVDS signal relay device 63 based on a field programmable gate array through a remote communication bus 62;

the field programmable gate array based BLVDS signal relay 63 is connected to the remote rack 65 via the remote rack communication bus 64;

the BLVDS signal relay 63 based on the field programmable gate array is used for forwarding and amplifying the bus signal.

The control system based on the BLVDS signal relay device disclosed in the above embodiments is used for the control system to forward and amplify the BLVDS signal on a remote rack. Under certain specific conditions, the remote communication data carrier and the remote rack local communication data carrier may be inconsistent (for example, optical signals are converted into electrical signals), signal types need to be converted again and a matching circuit needs to be added to ensure that the BLVDS signals are always in a state of good signal integrity on the whole communication bus, and the accuracy and reliability of remote communication of the control system are realized through abundant logic resources of an FPGA (Field Programmable Gate Array) and BLVDS interface resources on the basis that a designed relay device framework and the FPGA (Field Programmable Gate Array) are taken as cores.

As shown in fig. 7, a schematic structural diagram of an embodiment 7 of a control system based on a BLVDS signal relay device disclosed in the present invention is shown, where the system may include: a remote communication bus master station 71, a remote communication bus 72, a system-on-chip BLVDS signal relay 73, a remote chassis communication bus 74, and a remote chassis 75; wherein:

the remote communication bus master station 71 is connected with a BLVDS signal relay device 73 based on a system-on-chip through a remote communication bus 72;

the system-on-chip BLVDS signal relay 73 is connected to the remote chassis 75 through the remote chassis communication bus 74;

the system-on-chip BLVDS signal relay 73 is used to forward and amplify the bus signal.

The control system based on the BLVDS signal relay device disclosed in the above embodiments is used for the control system to forward and amplify the BLVDS signal on a remote rack. Under certain specific conditions, the remote communication data carrier and the remote rack local communication data carrier may be inconsistent (for example, optical signals are converted into electrical signals), signal types need to be converted again and a matching circuit is added to ensure that the BLVDS signals are always in a state of good signal integrity on the whole communication bus, and the accuracy and reliability of remote communication of the control System are realized through rich logic resources of a System On Chip (SOC) and BLVDS interface resources on the basis of taking a designed relay device framework and the SOC as a core.

In conclusion, the BLVDS signal relay device based on the programmable component replaces a BLVDS driver to realize the functions of forwarding and amplifying the bus signal, thereby reducing the complexity of a physical layer of a communication bus and reducing the material maintenance cost; a logic judgment mechanism is added to the BLVDS signal relay device based on the programmable element, so that the BLVDS half-duplex communication is more accurately realized.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.