CN109245864A - ETH-CAN communication front-end detection device and wrong self checking method based on self feed back - Google Patents
ETH-CAN communication front-end detection device and wrong self checking method based on self feed back Download PDFInfo
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- CN109245864A CN109245864A CN201811425871.2A CN201811425871A CN109245864A CN 109245864 A CN109245864 A CN 109245864A CN 201811425871 A CN201811425871 A CN 201811425871A CN 109245864 A CN109245864 A CN 109245864A
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Environmental & Geological Engineering (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
- Computer And Data Communications (AREA)
- Small-Scale Networks (AREA)
Abstract
The present invention proposes a kind of ETH-CAN communication front-end detection device based on self feed back, including server, the server is connected with host computer, the server is also connected with info encoder by Ethernet, the first CAN interface and the second CAN interface are respectively equipped on the info encoder, the first CAN bus is connected in first CAN interface, the second CAN bus is connected in second CAN interface, first CAN bus is connected with the second CAN bus and client respectively, second CAN bus is also connected with client.The use of ETH-CAN communication front-end detection device collocation error self checking method according to the present invention based on self feed back can be improved the efficiency of transmission of data, improve the wrong self-test capability of system, as far as possible the reliability of guarantee data transmission.
Description
Technical field
The present invention relates to communication field more particularly to it is a kind of based on self feed back ETH-CAN communication front-end detection device and
Mistake self checking method.
Background technique
A kind of communication network of CAN (Controller Area Network, the controller LAN) bus as control system
Network develops comparatively fast in distributed network control system, is a kind of multi-line network communicating system.Existing kinetic control system
CAN bus based network communication mode is mostly used greatly.The high-performance and reliability of CAN bus are accepted, lower cost
With high bus utilization, it is made to be widely used in industrial automation, ship, Medical Devices, industrial equipment etc..
With the development of computer, communication, network and control technology, the number towards the automation of factory's bottom and information integration
It is concerned and is widely applied according to the communication technology.CAN bus and Ethernet are two kinds and are touched based on random competition mechanism, event
Originating party formula, widely used and concern the communication network in industrial control system data exchange.
In industrial circle, network communication applications ICP/IP protocol is growing.CAN-Ethernet gateway, by
Existing Ethernet topological diagram provides wieldy CAN network transmission connection solution for user.User can pass through
TCP and UDP accesses Ethernet.In this process, CAN-Ethernet Gateway can handle up to 3 connections simultaneously
Device.Here it is users to apply an attendant application, and PC connects the mode of two or more CAN networks, and can visit simultaneously
Ask bus.
But the wrong self-test to CAN-Ethernet communication, there are still following problems:
(1) existing CAN communication time synchronizing method is although host computer sends synchronizing information in stipulated time point on time, by
Send and receive usually FIFO interrupt in CAN communication, data be not in practical communication after program instruction is assigned immediately
Program responds immediately after sending, receiving, and there are FIFO delay and interrupt response latencies, i.e., generally there are transmissions when host computer is sent
Delay distortion exists when node receives and receives delay distortion, and the synchronization for causing each node to be formed is actually mostly irregular, when
Between synchronization accuracy it is not high, more demanding for synchronization accuracy application is difficult to meet the requirements.
(2) in CAN-Ethernet communication, since there are larger differences for the network performance between CAN bus and Ethernet
It is different, it is mainly manifested in frame structure, package informatin rate, information time delay boundedness and network performance etc., therefore data pass through CAN-
When Ethernet gateway is transmitted, there is information misinformation or a possibility that loss of data is very big, cause system to be transmitted reliable
Property and validity reduce.
Summary of the invention
In order to solve the problems in the existing technology, the ETH-CAN communication based on self feed back that the invention proposes a kind of
Front-end detection device and wrong self checking method, to improve the efficiency of transmission of data, to improve the wrong self-test capability of system, as far as possible
Guarantee the reliability of data transmission.
To achieve the goals above, an aspect of of the present present invention proposes a kind of ETH-CAN communication front end based on self feed back
Detection device, including server, the server are connected with host computer, and the server is also compiled with information by Ethernet
Code device is connected, and is respectively equipped with the first CAN interface and the second CAN interface on the info encoder, and described the
It is connected with the first CAN bus in one CAN interface, the second CAN bus is connected in second CAN interface, it is described
First CAN bus is connected with the second CAN bus and client respectively, and second CAN bus is also connected with client.
Another aspect of the present invention proposes a kind of ETH-CAN communication front-end detection device based on above-mentioned based on self feed back
Wrong self checking method, comprising the following steps:
Step 1, server send data to the first CAN interface in info encoder by Ethernet；
The data that step 2, the info encoder receive the first CAN interface are sent by the first CAN bus
To the second CAN interface and client；
The data back that step 3, the info encoder receive the second CAN interface is to server；
Step 4, the server compare the return data in step 3 with the transmission data in step 1, judge two
It whether there is difference between person；
Step 5, when having differences and when data that client receives and the data difference that server is sent, then judge
Data transmission fault occur between the first CAN interface in server and info encoder, by above-mentioned judging result with
The time that data transmission fault occurs is stored in server, and is shown in host computer；Server will be to be transmitted later
Data are sent to client by the second CAN interface of info encoder；
Step 6, when the data difference that the data and server that receive there is no difference and client are sent, then judge
Data transmission fault occurs in the first CAN interface in info encoder and between client, by above-mentioned judging result out
The time occurred with data transmission fault is stored in server, and is shown in host computer；Server is to information later
Second CAN interface of encoder sends instruction, and the first CAN interface that the second CAN interface is received is sent
The data to come over are sent directly to client；
Step 7, when client by received data back into server, server judges the data and step 1
In transmission data it is consistent when, then do not store the judging result.
Preferably, the client is in the process of running, when there is function operation failure, then total by the 2nd CAN
Run-time error information is sent to server by line and the second CAN interface, and is sent a warning in host computer.
The beneficial effect of the program of the present invention be it is above-mentioned based on self feed back ETH-CAN communication front-end detection device and
Mistake self checking method has the advantage that
(1) transmission data are carried out by CAN-Ethernet gateway, compared to the prior art in only pass through CAN bus carry out
Data transmission, improves the transmission speed of data, and the transmission for taking full advantage of two kinds of communication networks of CAN and Ethernet is excellent
Gesture ensure that the safety of data transmission.
(2) by two CAN bus of connection, the stability transmitted using data between CAN bus and wrong self-test are compared
Carry out data transmission in merely with a CAN bus, the wrong self-test capability of system can be improved.
(3) by the self feed back between the second CAN interface and server, the wrong self-test in transmission process is realized,
Improve the detection rates of error of transmission, and in the server by error message storage, facilitate the later period to the amendment of mistake with
And equipment is updated according to the frequency that mistake occurs.
(4) time by the generation of host computer display data transmissions mistake and item, there are data biographies by warning operator
Defeated problem facilitates operator to solve the problems, such as and retransmit data according to prompt is quick, effectively increases the transmission of network
Efficiency.
(5) when there are error of transmission, server can be handled according to the result of wrong self-test, with improve server to
The efficiency of client transmissions data packet.
(6) client is in complete machine operational process, if the operation failure of a certain function, client will pass through the second CAN bus
The time of mistake generation and item etc. are directly back to server, and show warning information in host computer, convenient for dimension
The later maintenance of shield personnel.
Detailed description of the invention
Fig. 1 shows the structural representation of the ETH-CAN communication front-end detection device according to the present invention based on self feed back
Figure.
Appended drawing reference: 1- server, 2-Ethernet, 3- info encoder, the first CAN interface of 4-, the 2nd CAN of 5-
Bus interface, the first CAN bus of 6-, the second CAN bus of 7-, 8- client, 9- host computer.
Specific embodiment
A specific embodiment of the invention is further described with reference to the accompanying drawing.
As shown in Figure 1, the ETH-CAN (ETH refers to Ethernet) according to the present invention based on self feed back communicates front end
Detection device includes server 1, and the server 1 is connected with host computer 9, the server 1 by Ethernet2 also with letter
Breath encoder 3 is connected, and the first CAN interface 4 and the second CAN interface are respectively equipped on the info encoder 3
5, the first CAN bus 6 is connected in first CAN interface 4, is connected with second in second CAN interface 5
CAN bus 7, first CAN bus 6 are connected with the second CAN bus 7 and client 8 respectively, second CAN bus 7
It is connected with client 8.
The wrong self checking method of the specific ETH-CAN communication front-end detection device according to the present invention based on self feed back
The following steps are included:
Step 1, server 1 send data to the first CAN interface in info encoder 3 by Ethernet2
4。
Step 2, the info encoder 3 send out the data that the first CAN interface 4 receives by the first CAN bus 6
It send to the second CAN interface 5 and client 8.
The data back that step 3, the info encoder 3 receive the second CAN interface 5 is to server 1.
Step 4, the server 1 compare the return data in step 3 with the transmission data in step 1, judgement
Therebetween it whether there is difference.
Step 5, when having differences and when data that client 8 receives and the data difference that server 1 is sent, then judge
Data transmission fault occurs between the first CAN interface 4 in server 1 and info encoder 3 out, and above-mentioned judgement is tied
The time that fruit and data transmission fault occur is stored in server 1, and is shown in host computer 9；Server 1 will later
Data to be transmitted are sent to client 8 by the second CAN interface 5 of info encoder 3.
Step 6, when the data difference that the data and server 1 that receive there is no difference and client 8 are sent, then sentence
Disconnected data transmission fault out occurs in the first CAN interface 4 in info encoder 3 and between client 8, by above-mentioned judgement
As a result the time occurred with data transmission fault is stored in server 1, and is shown in host computer 9；Server 1 later
Instruction, the first CAN bus that the second CAN interface 5 is received are sent to the second CAN interface 5 of info encoder 3
The data that interface 4 sends over are sent directly to client 8.
Step 7, when client 8 by received data back into server 1, server 1 judge the data and step
When transmission data in rapid 1 are consistent, then the judging result is not stored.
In order to realize the function that actively reports an error, the client 8 in the process of running, when there is function operation failure, then
Run-time error information is sent to server 1 by the second CAN bus 7 and the second CAN interface 5, and in host computer 9
In send a warning, wherein run-time error information includes time, the item etc. that run-time error occurs.
ETH-CAN communication front-end detection device according to the present invention based on self feed back and wrong self checking method have with
Lower advantage:
(1) transmission data are carried out by CAN-Ethernet gateway, compared to the prior art in only pass through CAN bus carry out
Data transmission, improves the transmission speed of data, and the transmission for taking full advantage of two kinds of communication networks of CAN and Ethernet is excellent
Gesture ensure that the safety of data transmission.
(2) by two CAN bus of connection, the stability transmitted using data between CAN bus and wrong self-test are compared
Carry out data transmission in merely with a CAN bus, the wrong self-test capability of system can be improved.
(3) pass through the self feed back between the second CAN interface 5 and server 1, the mistake in realization transmission process is certainly
Inspection improves the detection rates of error of transmission, and in the server 1 by error message storage, the later period is facilitated to repair mistake
Just and according to the frequency that mistake occurs equipment is updated.
(4) time by the generation of 9 display data transmissions mistake of host computer and item, there are data biographies by warning operator
Defeated problem facilitates operator to solve the problems, such as and retransmit data according to prompt is quick, effectively increases the transmission of network
Efficiency.
(5) when there are error of transmission, server can be handled according to the result of wrong self-test, to improve server 1
The efficiency of data packet is transmitted to client 8.
(6) client 8 is in complete machine operational process, if the operation failure of a certain function, client 8 will be total by the 2nd CAN
The time of mistake generation and item etc. are directly back to server 1 by line 7, and show warning information in host computer 9, just
In the later maintenance of maintenance personnel.
Claims (3)
1. a kind of ETH-CAN based on self feed back communicates front-end detection device, it is characterised in that: including server, the service
Device is connected with host computer, and the server is also connected with info encoder by Ethernet, in the info encoder
On be respectively equipped with the first CAN interface and the second CAN interface, be connected with the first CAN in first CAN interface
Bus, is connected with the second CAN bus in second CAN interface, first CAN bus respectively with the second CAN bus
It is connected with client, second CAN bus is also connected with client.
2. a kind of ETH-CAN communication front-end detection device based on described in claim 1 based on self feed back is wrong from procuratorial organ
Method, it is characterised in that: the following steps are included:
Step 1, server send data to the first CAN interface in info encoder by Ethernet；
The data that first CAN interface receives are sent to by the first CAN bus by step 2, the info encoder
Two CAN interfaces and client；
The data back that step 3, the info encoder receive the second CAN interface is to server；
Step 4, the server compare the return data in step 3 with the transmission data in step 1, judge the two
Between whether there is difference；
Step 5, when having differences and when data that client receives and the data difference that server is sent, then judge data
Error of transmission occurs between the first CAN interface in server and info encoder, by above-mentioned judging result and data
The time that error of transmission occurs is stored in server, and is shown in host computer；Server is by data to be transmitted later
Client is sent to by the second CAN interface of info encoder；
Step 6, when the data difference that the data and server that receive there is no difference and client are sent, then judge to count
Occur according to error of transmission in the first CAN interface in info encoder and between client, by above-mentioned judging result and number
It is stored in server according to the time that error of transmission occurs, and is shown in host computer；Server is to information coding later
Second CAN interface of device sends instruction, and the first CAN interface that the second CAN interface is received sends over
Data be sent directly to client；
Step 7, when client by received data back into server, server judges in the data and step 1
When transmission data are consistent, then the judging result is not stored.
3. the wrong self checking method of the ETH-CAN communication front-end detection device according to claim 2 based on self feed back,
Be characterized in that: the client in the process of running, when there is function operation failure, then passes through the second CAN bus and the
Run-time error information is sent to server by two CAN interfaces, and is sent a warning in host computer.
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