CN111654424A - Method and system for converting multipath parallel CAN into Ethernet - Google Patents
Method and system for converting multipath parallel CAN into Ethernet Download PDFInfo
- Publication number
- CN111654424A CN111654424A CN202010500760.4A CN202010500760A CN111654424A CN 111654424 A CN111654424 A CN 111654424A CN 202010500760 A CN202010500760 A CN 202010500760A CN 111654424 A CN111654424 A CN 111654424A
- Authority
- CN
- China
- Prior art keywords
- chip
- bus
- data
- ethernet
- spi
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 18
- 238000013461 design Methods 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- XYDVHKCVOMGRSY-UHFFFAOYSA-N 4-(4-benzylphenyl)-1,3-thiazol-2-amine Chemical compound S1C(N)=NC(C=2C=CC(CC=3C=CC=CC=3)=CC=2)=C1 XYDVHKCVOMGRSY-UHFFFAOYSA-N 0.000 claims description 13
- 101000928034 Homo sapiens Proteasomal ubiquitin receptor ADRM1 Proteins 0.000 claims description 13
- 102100036915 Proteasomal ubiquitin receptor ADRM1 Human genes 0.000 claims description 13
- 101001050286 Homo sapiens Jupiter microtubule associated homolog 1 Proteins 0.000 claims description 12
- 102100023133 Jupiter microtubule associated homolog 1 Human genes 0.000 claims description 12
- 230000003068 static effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 238000001514 detection method Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000010365 information processing Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40032—Details regarding a bus interface enhancer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/4013—Management of data rate on the bus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L2012/421—Interconnected ring systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention relates to the technical field of communication, in particular to a method and a system for converting multipath parallel CAN into Ethernet, which comprises the following steps: CAN bus communication is processed through a plurality of control chips, each CAN bus is connected with 20 monitoring nodes, the control chips adopt SPI interfaces to realize CAN bus synchronization, a programmable logic device is selected to realize 3-path SPI synchronization design, and a parallel port bus is adopted at a data output end to communicate with a previous-level chip. The invention adopts 12 paths of CAN buses to work in parallel, so that products of the CAN buses are not acquired simultaneously in the market, and all data are processed at a board level, so that the efficiency is very high; data are transmitted upwards, CAN of 125kbps, SPI of 4Mbps and a parallel port of 30Mbps are finally converged into Ethernet, the transmission rate of the CAN at the bottom layer is the bottleneck of the speed, and the transmission efficiency of data streams cannot be influenced by the conversion of upper-layer protocols.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a system for converting multipath parallel CAN into Ethernet.
Background
The industrial field often uses bus equipment for networking communication instead of the Ethernet which is commonly used by ordinary users at present. Among bus networks, CAN bus networks are a common architecture. Originally, can (controller Area network) was a communication protocol for automotive circuits, but is now widely used in various automation devices due to its reliability. In the CAN bus network structure, the communication mode of the equipment is a multi-master mode: all devices are connected to the same bus, and all devices can send messages when idle (compared with the master-slave mode, only a specific host can send messages and apply for a reply). When the CAN communication module is applied to a detection system, a CAN communication module is generally arranged on detection equipment, the detection equipment collects information and then sends the information to an information processing center at the other end of a bus through the CAN module, and the information is transmitted to user equipment in other forms by the information processing center.
The detection equipment and the system using the CAN network have more mature products, but common equipment is limited by a CAN protocol, the number of buses and ports of single set of equipment is limited, the number requirements of the equipment to be detected in part production fields cannot be met, and the cost is increased due to the fact that multiple sets of systems work cooperatively. Therefore, a method and a system for converting multipath parallel CAN into Ethernet are provided.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method and a system for converting a multi-path parallel CAN into an Ethernet, which have the characteristics of carrying out grid connection on 12 paths of CAN buses, packaging data in an Ethernet form and transmitting the data to an upper computer, realizing high-speed data acquisition, and solving the problems that the number of buses and ports of the existing equipment is limited and the number requirement of part of equipment to be tested in a production field cannot be met.
The invention provides the following technical scheme:
a method for converting a multipath parallel CAN into an Ethernet comprises the following steps: CAN bus communication is processed through a plurality of control chips, each CAN bus is connected with 20 monitoring nodes, the control chips adopt SPI interfaces to realize CAN bus synchronization, a programmable logic device is selected to realize 3-path SPI synchronization design, and a parallel port bus is adopted at a data output end to communicate with a previous-level chip.
Preferably, the control chip adopts an ARM chip, and the control chip is used for transmitting CAN bus subnet data to the SPI interface.
A system for converting a multipath parallel CAN into an Ethernet comprises an Ethernet, a programmable logic device and an ARM chip;
the ARM chip comprises an ARM1 chip, an ARM2 chip, an ARM3 chip and an ARM4 chip, each of the ARM1 chip, the ARM2 chip and the ARM3 chip transmits subnet data of 4 CAN buses to the SPI, and each CAN bus is connected with 20 monitoring nodes;
the programmable logic device is respectively connected and communicated with an ARM1 chip, an ARM2 chip and an ARM3 chip through three SPI interfaces, the programmable logic device is communicated with the ARM4 chip in an address data bus mode, and the ARM4 is communicated with an industrial personal computer through an Ethernet interface.
Preferably, the CAN bus further comprises a static random access memory for storing data collected by the CAN bus.
Preferably, the device also comprises a data acquisition module, wherein the data acquisition module issues an instruction to the CAN information acquisition card through a network port by using an upper computer, and the instruction is transmitted to the comprehensive measurement device through a CAN bus after protocol conversion.
Preferably, the CAN intelligent node system also comprises a node working state display module, and when the CAN intelligent node is not firmly connected physically and is not accessed to a CAN network, the node working state display module displays that the node is disconnected.
Preferably, the CAN information acquisition card also comprises an IO card, and the IO card is communicated with the CAN information acquisition card through a CAN interface.
Preferably, the system also comprises a CAN bus baud rate modifying module, the CAN bus baud rate modifying module sends an instruction to an ARM4 chip by using an upper computer, the ARM4 chip is provided with an EEPROM with a memory of 4Kb, the ARM4 chip receives the instruction sent by the upper computer, modifies the value of a specific address of the EEPROM, then powers on the board card again, firstly judges the value of the baud rate stored in the EEPROM, and then transmits signals to the ARM1 chip, the ARM2 chip and the ARM3 chip through two pins so that the baud rate initialization of the CAN bus baud rate modifying module is matched with the system.
The invention provides a method and a system for converting a multipath parallel CAN into an Ethernet, which adopt 12 paths of CAN buses to work in parallel, so that products of the CAN buses are not collected simultaneously in the market, all data are processed at a board level, and the efficiency is very high; data are transmitted upwards, CAN of 125kbps, SPI of 4Mbps and a parallel port of 30Mbps are finally converged into Ethernet, the transmission rate of the CAN at the bottom layer is the bottleneck of speed, and the transmission efficiency of data stream cannot be influenced by upper-layer protocol conversion; the CPLD in the middle layer has more and more devices used in a production field, the monitoring system has products with the same functions in the old period, but the coverage area of the whole monitoring network is improved by 4 times, the speed is increased by 5 times, and the CPLD in the middle layer can greatly enhance the expansibility of the whole system along with the increase of nodes; and board level communication, and finally, an Ethernet interface is reserved, so that the system can interact with an industrial personal computer in a high-speed and convenient manner, and can also carry out ring network design on the whole large monitoring system.
Drawings
FIG. 1 is a diagram of the network architecture of the present invention;
FIG. 2 is a schematic diagram of bus utilization of a prior art TTCAN;
FIG. 3 is a schematic diagram of the improved bus utilization of 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.
Referring to fig. 1-3, the present invention provides a technical solution:
a method for converting a multipath parallel CAN into an Ethernet comprises the following steps: CAN bus communication is processed through a plurality of control chips, each CAN bus is connected with 20 monitoring nodes, the control chips adopt SPI interfaces to realize CAN bus synchronization, a programmable logic device is selected to realize 3-path SPI synchronization design, and a parallel port bus is adopted at a data output end to communicate with a previous-level chip.
The control chip adopts an ARM chip and is used for transmitting CAN bus subnet data to the SPI interface.
A system for converting a multipath parallel CAN into an Ethernet comprises an Ethernet, a programmable logic device and an ARM chip;
the ARM chip comprises an ARM1 chip, an ARM2 chip, an ARM3 chip and an ARM4 chip, each of the ARM1 chip, the ARM2 chip and the ARM3 chip transmits subnet data of 4 CAN buses to the SPI, and each CAN bus is connected with 20 monitoring nodes;
the programmable logic device is respectively connected and communicated with an ARM1 chip, an ARM2 chip and an ARM3 chip through three SPI interfaces, the programmable logic device is communicated with the ARM4 chip in an address data bus mode, and the ARM4 is communicated with an industrial personal computer through an Ethernet interface.
The information needing to be transmitted of each monitoring node is 56 bits, 8-bit functional codes are added, the total amount is 64 bits, the maximum data of one frame of data transmission of CAN bus communication is 64 bits, and the transmission of one frame of data CAN be completed. The length of the CAN standard frame data domain is 64 bits, and the sum of the length of the CAN standard frame data domain and other transmission bits such as address information is almost 125 bits. The system requires a CAN transmission rate of 125Kbps, so that each monitoring node transmits 1ms of time bits on the bus. In this case, the ideal speed of data update of the whole monitoring system is 4.8s, which does not include the time of command issue. The requirement of Party A on the data acquisition rate of the monitoring system is that all the upper computers are updated within 4 s. Therefore, the design of multi-path CAN bus grid connection is adopted, so that data CAN be transmitted in parallel. Therefore, the CAN nodes are required to be divided into subnets, and finally, the design adopts the design of 12 subnets in combination with the rapidity of field construction and transmission. The problem to be solved is how to carry out grid connection on the 12-channel CAN bus, and data is packaged in an Ethernet mode and transmitted to an upper computer to realize high-speed data acquisition.
And carrying out grid connection on the 12 paths of CAN buses. At present, the controller of a semiconductor manufacturer generally only comprises 2 CAN controllers, and the most CAN special chip also comprises 4 CAN controllers, so that one-level protocol conversion is needed, and 12 CAN buses are connected in a grid mode. The Baud rate of CAN communication is required to be 125kbps on site, and the communication rate of the middle layer is far greater than the CAN communication rate to realize grid-connected data acquisition. The SPI interface is simple to realize, occupies less resources and has high communication speed. Therefore, the next-level communication mode of the CAN bus grid connection is an SPI interface, and the total number of the SPI interfaces is three.
The bottom layer processes CAN bus communication through a plurality of control chips, the control chips adopt SPI interfaces to realize CAN bus grid connection, a common ARM chip only has 2 SPI interfaces, and therefore, a programmable logic device (CPLD) is selected to realize 3-way SPI grid connection design. The structure realizes 12 CAN- >3 SPI- > parallel port bus- > Ethernet.
In chip type selection, the combination of ARM and CPLD is designed, and 3 CAN special chips, ARM1-ARM3, are used for realizing data transmission from CAN bus subnet data to SPI interface data. Taking ARM1 as an example, 4 CAN controllers are integrated inside the CAN bus, and are used as hosts of each CAN bus, and command requests are sent through a main node to collect data of intelligent nodes on the CAN bus. Data collected by the CAN bus are uploaded through the SPI, and meanwhile the SPI receives issued commands which are then decoded and sent to the target intelligent node through the CAN bus. The SPI slave machine is connected with the CPLD for communication in a 3-path SPI mode, an SPI slave machine receiving and sending module is constructed in the CPLD, the Baud rate of SPI communication is 4Mbps, data are cached at the same time, and then a parallel bus interface is provided for data exchange with the ARM 4. The CPLD and the top ARM4 adopt an address data bus form for communication, the ARM4 is provided with an EMC (external storage interface), the CPLD is treated as a piece of SRAM, the data transmission CAN reach 30Mbps, a piece of SRAM is expanded in consideration of large data volume of the design, data collected by the CAN bus are stored in the expanded SRAM according to a designed data structure, and finally the ARM4 communicates with an industrial personal computer through an Ethernet interface to realize the centralized monitoring of the whole system.
And the static random access memory is used for storing the data collected by the CAN bus.
And the data acquisition module issues an instruction to the CAN information acquisition card through the network port by using an upper computer, and the instruction is transmitted to the comprehensive measurement device through a CAN bus after protocol conversion. And the data of the comprehensive measuring device is back-packed and transmitted to the board card through the CAN bus, and finally transmitted to the upper computer in an Ethernet mode. Meanwhile, the collected data are stored, fault judgment is carried out on the data, and corresponding alarm information is sent. For a monitoring node which has a fault or is in other states, a corresponding working state can be set independently, for example, if the unit is shielded, whether the current node is abnormal or not is not judged.
And when the CAN intelligent nodes are not firmly connected physically and are not connected to the CAN network, the node working state display module displays that the nodes are disconnected. When the CAN intelligent nodes are not firmly connected and are not connected to a CAN network, the system needs to judge that the nodes are disconnected in a bottom CAN protocol, and the function is particularly significant when the equipment is installed on site.
And the IO card is communicated with the CAN information acquisition card through a CAN interface. The IO card function comprises IO input detection, such as switching the working state of a node; and displaying the working state, including an alarm signal lamp and a working state signal lamp. Another important function is to detect whether the power supply supplying power to the monitoring node is abnormal, and the normal working state of the power supply is 380V and 1600 Hz. The IO card processes a 380V power supply through a transformer to obtain alternating current of about 1.5V, and then filters and processes the alternating current to obtain square waves so as to measure voltage and frequency.
The CAN bus baud rate modifying module utilizes an upper computer to send an instruction to an ARM4 chip, the ARM4 chip is provided with an EEPROM memory with a memory of 4Kb, the ARM4 chip receives the instruction sent by the upper computer to modify the value of a specific address of the EEPROM, then the board card is electrified again, the value of the baud rate stored in the EEPROM memory is firstly judged when the board card is electrified, and then signals are transmitted to the ARM1 chip, the ARM2 chip and the ARM3 chip through two pins, so that the baud rate initialization of the board card is matched with a system.
The monitoring system of the invention needs 240 comprehensive measuring devices in total, CAN realize high-speed acquisition of all information of the 240 CAN nodes, and solves the problems that the number of buses and ports of the existing equipment is limited, and the quantity requirement of partial equipment to be tested in a production field cannot be met.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A method for converting a multipath parallel CAN into an Ethernet is characterized in that: the method comprises the following steps: CAN bus communication is processed through a plurality of control chips, each CAN bus is connected with 20 monitoring nodes, the control chips adopt SPI interfaces to realize CAN bus synchronization, a programmable logic device is selected to realize 3-path SPI synchronization design, and a parallel port bus is adopted at a data output end to communicate with a previous-level chip.
2. The method of claim 1, wherein the method comprises: the control chip adopts an ARM chip and is used for transmitting CAN bus subnet data to the SPI interface.
3. A multi-parallel CAN to ethernet system according to claim 1 or 2, characterized in that: the system comprises an Ethernet, a programmable logic device and an ARM chip;
the ARM chip comprises an ARM1 chip, an ARM2 chip, an ARM3 chip and an ARM4 chip, each of the ARM1 chip, the ARM2 chip and the ARM3 chip transmits subnet data of 4 CAN buses to the SPI, and each CAN bus is connected with 20 monitoring nodes;
the programmable logic device is respectively connected and communicated with an ARM1 chip, an ARM2 chip and an ARM3 chip through three SPI interfaces, the programmable logic device is communicated with the ARM4 chip in an address data bus mode, and the ARM4 is communicated with an industrial personal computer through an Ethernet interface.
4. The system of claim 3, wherein: the CAN bus also comprises a static random access memory which is used for storing the data collected by the CAN bus.
5. The system of claim 3, wherein: the CAN bus integrated measuring device also comprises a data acquisition module, wherein the data acquisition module issues an instruction to the CAN information acquisition card through a network port by using an upper computer, and the instruction is transmitted to the integrated measuring device through the CAN bus after protocol conversion.
6. The system of claim 3, wherein: the CAN intelligent node system is characterized by further comprising a node working state display module, and when the CAN intelligent node is not firmly connected physically and is not connected to a CAN network, the node working state display module displays that the node is disconnected.
7. The system of claim 5, wherein: the CAN information acquisition card is communicated with the IO card through the CAN interface.
8. The system of claim 3, wherein: the CAN bus baud rate modifying module sends an instruction to an ARM4 chip by using an upper computer, the ARM4 chip is provided with an EEPROM with a memory of 4Kb, the ARM4 chip receives the instruction sent by the upper computer, modifies the value of a specific address of the EEPROM, and then powers on the board card again, firstly judges the value of the baud rate stored in the EEPROM, and then transmits signals to the ARM1 chip, the ARM2 chip and the ARM3 chip through two pins so that the baud rate initialization of the CAN bus baud rate modifying module is matched with a system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010500760.4A CN111654424A (en) | 2020-06-04 | 2020-06-04 | Method and system for converting multipath parallel CAN into Ethernet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010500760.4A CN111654424A (en) | 2020-06-04 | 2020-06-04 | Method and system for converting multipath parallel CAN into Ethernet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111654424A true CN111654424A (en) | 2020-09-11 |
Family
ID=72349285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010500760.4A Pending CN111654424A (en) | 2020-06-04 | 2020-06-04 | Method and system for converting multipath parallel CAN into Ethernet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111654424A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260894A (en) * | 2020-10-16 | 2021-01-22 | 北京航天发射技术研究所 | CAN bus network system performance test platform and use method |
| CN113884895A (en) * | 2021-11-15 | 2022-01-04 | 武汉长海高新技术有限公司 | A CAN bus-Ethernet data conversion device and method for battery testing |
| CN117311246A (en) * | 2023-11-29 | 2023-12-29 | 天津凯普林光电科技有限公司 | Laser control method, system, device, electronic equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692977A (en) * | 2009-10-16 | 2010-04-14 | 中国科学院合肥物质科学研究院 | Multiparameter biological information testing platform and testing method |
| CN202435428U (en) * | 2012-01-04 | 2012-09-12 | 广东易事特电源股份有限公司 | A COMBINER BOX SYSTEM BASED ON CAN BUS COMMUNICATION NETWORK TOPOLOGY |
| CN102842938A (en) * | 2012-09-28 | 2012-12-26 | 山东轻工业学院 | Terminal controlling unit of storage battery charging/discharging distributed control system |
-
2020
- 2020-06-04 CN CN202010500760.4A patent/CN111654424A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692977A (en) * | 2009-10-16 | 2010-04-14 | 中国科学院合肥物质科学研究院 | Multiparameter biological information testing platform and testing method |
| CN202435428U (en) * | 2012-01-04 | 2012-09-12 | 广东易事特电源股份有限公司 | A COMBINER BOX SYSTEM BASED ON CAN BUS COMMUNICATION NETWORK TOPOLOGY |
| CN102842938A (en) * | 2012-09-28 | 2012-12-26 | 山东轻工业学院 | Terminal controlling unit of storage battery charging/discharging distributed control system |
Non-Patent Citations (1)
| Title |
|---|
| 周鹏: "《基于多路CAN总线的监控系统设计与开发》", 《中国优秀博硕士学位论文全文数据库，信息科技辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260894A (en) * | 2020-10-16 | 2021-01-22 | 北京航天发射技术研究所 | CAN bus network system performance test platform and use method |
| CN112260894B (en) * | 2020-10-16 | 2022-05-10 | 北京航天发射技术研究所 | A kind of CAN bus network system performance test platform and using method |
| CN113884895A (en) * | 2021-11-15 | 2022-01-04 | 武汉长海高新技术有限公司 | A CAN bus-Ethernet data conversion device and method for battery testing |
| CN117311246A (en) * | 2023-11-29 | 2023-12-29 | 天津凯普林光电科技有限公司 | Laser control method, system, device, electronic equipment and storage medium |
| CN117311246B (en) * | 2023-11-29 | 2024-02-20 | 天津凯普林光电科技有限公司 | Laser control method, system, device, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106647613B (en) | PLC (programmable logic controller) dual-machine redundancy method and system based on MAC (media access control) | |
| CN111654424A (en) | Method and system for converting multipath parallel CAN into Ethernet | |
| CN102833112A (en) | Communication management machine having looped network function | |
| CN102170430A (en) | Multi-port multi-network protocol converter | |
| CN102365844A (en) | Communication Adapter Unit | |
| CN202077061U (en) | Multi-port and multi-network protocol converter | |
| CN112199316B (en) | Configuration method and communication method of chain-type master-slave serial port communication device | |
| CN107896120B (en) | Automatic environmental information monitoring method and system | |
| CN112565039B (en) | Communication network architecture | |
| CN110247936A (en) | A kind of communications protocol transition card and Conversion System of Communication Protocol | |
| CN101854258A (en) | Implementation method and device for eliminating communication chip failures | |
| CN112491505A (en) | Communication method, device and system | |
| CN108833218A (en) | network system of multi-connected air conditioning unit and establishing method thereof | |
| CN203858629U (en) | Protocol converter | |
| CN107222380A (en) | Support the two-wire EtherCAT method for converting protocol and device of link redundancy | |
| CN106850368A (en) | A kind of control method of repeater and its data transfer | |
| CN204155117U (en) | A kind of big-power transducer control system | |
| CN117579418A (en) | A master-slave adaptive communication system and communication method based on RS485 bus | |
| KR20200098282A (en) | Gateway System for Heterogeneous Fieldbus Network | |
| CN205647567U (en) | Thing networking gateway and thing communication network system | |
| CN210380922U (en) | Protocol conversion device and system | |
| CN116723102A (en) | Communication network optimization method, system, equipment and storage medium | |
| CN105743927B (en) | A kind of CANopen and DP protocol data conversion method | |
| CN208924235U (en) | Processor and network security device | |
| CN115982050A (en) | Multifunctional test system and method for IO-Link master station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200911 |