CN207612273U - A kind of communication system based on CAN bus - Google Patents
A kind of communication system based on CAN bus Download PDFInfo
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- CN207612273U CN207612273U CN201721579819.3U CN201721579819U CN207612273U CN 207612273 U CN207612273 U CN 207612273U CN 201721579819 U CN201721579819 U CN 201721579819U CN 207612273 U CN207612273 U CN 207612273U
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- 238000004891 communication Methods 0.000 title claims abstract description 52
- 238000012545 processing Methods 0.000 claims abstract description 21
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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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Abstract
The utility model provides a kind of communication system based on CAN bus, including：Gateway has CAN interface；CAN bus, one end are connect with the gateway, and the other end extends to industry control occasion；At least one substation, the substation have CAN interface, are connect with the gateway by the CAN bus；At least one sensor set on the industry control occasion is connect with a substation, and the substation receives the analog signal that the sensor generates, then the analog signal is converted to and is sent to the gateway by the CAN bus after digital signal.After adopting the above technical scheme, so that the communication interface of communication system is unified, simplified interface circuit design reduces the occupancy to central processing unit hardware resource；Simplify communication line wiring, mitigate difficult wiring, reduces wiring cost；Real-time communication, strong antijamming capability.
Description
Technical field
The utility model is related to the communications field more particularly to a kind of communication systems based on CAN bus.
Background technology
In industrial control field, need to set using control unit or central processing unit connection various kinds of sensors or work
It is standby, obtain the detection signal of sensor and the work state information of each equipment.However in many industry control occasions, need to multiple
Sensor or equipment are attached and data interaction, leads to the signal transmission form broad categories with the central processing unit,
And the performance parameters such as communication distance, anti-interference of various communication modes are different, and many difficulties are brought to wiring installation, and
Generally all also to do anti-tampering shielding processing.In addition, each sensor and equipment are directly connect with central processing unit, can occupy
I/O mouthfuls of resources of a large amount of control unit, or even also need to build the circuits such as signal processing circuit, such as A/D conversions, signal amplification；
Various types of signal needs to carry out software and hardware processing after entering the central processing unit, increases the workload of central processing unit.
In automotive field, often CAN bus is used to realize the communication between vehicle electronics device, however existing CAN is total
Line communication is all often that oneself is special for automobile vendor, does not announce agreement externally, therefore the large-scale application not yet in industrial control field.
Therefore it needs to apply CAN bus communication mode in industrial control field, can reduce to central processing unit resource
Occupancy, solve communication line difficult wiring.
Utility model content
In order to overcome above-mentioned technological deficiency, the purpose of this utility model is to provide a kind of communication systems based on CAN bus
System realizes the communication of central processing unit and each substation in industry control scene by CAN bus, realizes the technology effect of Unified Communication mode
Fruit.
The utility model discloses a kind of communication systems based on CAN bus, including：Gateway has CAN interface；
CAN bus, one end are connect with the gateway, and the other end extends to industry control occasion；At least one substation, the substation have CAN
Bus interface is connect by the CAN bus with the gateway；At least one sensor set on the industry control occasion, with one
Substation connects, and the substation receives the analog signal that the sensor generates, then the analog signal is converted to digital signal
The gateway is sent to by the CAN bus afterwards.
Preferably, the communication system further includes：Central processing unit is connect with the gateway, by the gateway with
Each substation communication.
Preferably, the gateway has serial line interface, and the central processing unit passes through the serial line interface and the net
Connection connects.
Preferably, the communication system further includes：Host computer is connect with the gateway, passes through the gateway and each son
It stands communication, the parameter of each substation is set.
Preferably, the host computer is connect by RS232 interface with the gateway.
Preferably, the substation includes serial line interface, is set with the work for working in industry control occasion by the serial line interface
Standby connection.
Preferably, the serial line interface of the substation is RS232 interface or RS485 interfaces.
After using above-mentioned technical proposal, compared with prior art, have the advantages that：
1. communication interface is same, simplify interface circuit design, reduces the occupancy to central processing unit hardware resource；
2. simplifying communication line wiring, mitigate difficult wiring, reduces wiring cost；
3. real-time communication, strong antijamming capability.
Description of the drawings
Fig. 1 is the structure diagram for meeting the communication system based on CAN bus in one preferred embodiment of the utility model.
Reference numeral：
10- gateways, 11-CAN buses, the substations 12-, 13- working equipments, 14- sensors, 15- central processing unit, 16-
Host computer.
Specific implementation mode
The advantages of the utility model is expanded on further below in conjunction with attached drawing and specific embodiment.
It is the structure diagram for meeting the communication system based on CAN bus in one preferred embodiment of the utility model refering to fig. 1,
The communication system includes：
Gateway 10
The gateway 10 has CAN interface.Gateway 10 in the application is not computer network in general sense
The network gateway for the responsible protocol conversion applied in network, but the concept of network gateway is extended, the net in the application
The signal of communication of communication protocol different in industrial circle, data format or even electrical standard is converted in pass, such as by CAN
Signal of communication in bus 11 is converted to rs 232 serial interface signal or the signal of other forms, can regard a signal of communication translater as.
In the present embodiment, the gateway 10 has CAN interface, that is, has the ability being connect with CAN bus 11, and operation has CAN total
Wire protocol can be communicated with the various kinds of equipment being connected in same CAN bus 11.General branch is integrated in the gateway 10
The chip of CAN bus 11, such as CAN transceiver interface chip PCA82C250T are held, the signal of communication in CAN bus 11 can be turned
It is changed to general serial signal, is connect with other equipment by serial line interface.The gateway 10 should also surround CAN interface and string
Mouthful interface lays corresponding hardware interface circuit, such as serial interface data line is equipped with pull-up resistor, the power end on interface with
The power supply of the gateway 10 connects.
CAN bus 11
11 one end of the CAN bus is connect with the gateway 10, and the other end extends to industry control occasion.CAN is
The abbreviation (hereinafter referred to as CAN) of Controller Area Network, is the serial communication protocol of ISO International standardizations, Chang Ying
Data interaction in automobile industry, being used between various electronic control systems.The present embodiment is on the basis of standard CAN bus
On, in conjunction with the application characteristic of industrial control field, carry out the secondary development of self-defining data and communication protocol.The CAN bus 11 exists
Physical layer is made of two conducting wires, respectively represents CANH and CANL, when equipment of the CAN bus 11 with CAN bus 11 is supported
It, must be corresponding with CANH the and CANL terminals in equipment or gateway 10 or when the connection of gateway 10.
Substation 12
The substation 12 is at least one, has CAN interface, is connected by the CAN bus 11 and the gateway 10
It connects.The substation 12 can be the microcontroller for having CAN interface, PLC, and be integrated in the shell of suitable industry control environment.
The substation 12 has the ability being connect with the various kinds of equipment at industry control scene or sensor, that is, has serial port or simulation input is defeated
Outgoing interface.
Sensor 14
At least one connect set on the industry control occasion with a substation 12 sensor 14, and the substation 12 receives
The analog signal that the sensor 14 generates, then the analog signal is converted to after digital signal through the CAN bus 11
It is sent to the gateway 10.The sensor 14 can be different type, such as temperature sensing according to the application of industry control occasion
Device, range sensor, flow sensor etc..The physical quantity of detection is converted to analog signal, including simulation by the sensor 14
Voltage signal or analog current signal.The substation 12 receives institute after the analog signal through built-in analog-to-digital conversion module
It states analog signal and is converted to digital signal, the gateway 10 is sent to finally by the CAN bus 11.The microcontroller of mainstream or
PLC has analog signal input sample channel, therefore can realize analog-digital conversion function inside the substation 12, can also use
External modulus conversion chip realizes analog-to-digital conversion.
As being further improved for the communication system, the communication system further includes：
Central processing unit 15
The central processing unit 15 is connect with the gateway 10, is communicated with each substation 12 by the gateway 10.It is right
The purpose that the equipment or sensor at industry control scene carry out data interaction is to be analyzed and determined, and assist industry control measure, therefore need
It wants the central processing unit 15 to be collected, judge to these information and makes action command.The central processing unit 15
It can be microcontroller or microprocessor, have serial line interface, and connect with the gateway 10 by serial line interface.The centre
It is stored with the mailing address of each substation in reason unit 15, can be led to each substation 12 by the gateway 10 and CAN bus 11
Letter, carries out on-site data gathering and control instruction issues.
As being further improved for the communication system, the communication system further includes：
Host computer 16
The host computer 16 is connect with the gateway 10, is communicated with each substation 12 by the gateway 10, each son is arranged
Stand 12 parameter.In the communication system, each substation 12 should be set as different addresses, just can ensure that total in same CAN
Orderly into row data communication on line 11, also need to 12 setting messaging parameter such as baud rates etc. of respectively standing.The host computer 16 passes through
Serial line interface is connect with the gateway, such as RS232 interface.The host computer 16 by the gateway 10 and CAN bus 11 with
Connection is established in each substation 12, and issues parameter to each substation.Operation has upper computer software on the host computer 16, supports user defeated
Enter each parameter of the setting to substation, and serial line interface is called to send the parameter to the gateway 10.
As being further improved for the communication system, the substation 12 includes serial line interface, passes through the serial line interface
It is connect with the working equipment 13 for working in industry control occasion.The working equipment 13 can be the process equipment applied to industry control occasion
Or ancillary equipment, such as reacting furnace, heating device, air-conditioning etc., the working equipment 13 have electronic control system, and by certainly
The serial line interface of band is connect with the substation 12, carries out data interaction, and reporting equipment working condition receives control instruction.It is described
The serial line interface of substation 12 depending on the type for the serial line interface that the working equipment 13 is supported, can be RS232 interface or
RS485 interfaces.
It should be noted that the embodiments of the present invention have preferable implementation, and not the utility model is appointed
The limitation of what form, any one skilled in the art change or are modified to possibly also with the technology contents of the disclosure above
Same effective embodiment, as long as without departing from the content of technical solutions of the utility model, according to the technical essence of the utility model pair
Any modification or equivalent variations and modification, are still within the scope of the technical solutions of the present invention made by above example.
Claims (7)
1. a kind of communication system based on CAN bus, which is characterized in that including：
Gateway has CAN interface；
CAN bus, one end are connect with the gateway, and the other end extends to industry control occasion；
At least one substation, the substation have CAN interface, are connect with the gateway by the CAN bus；
At least one sensor set on the industry control occasion is connect with a substation, and the substation receives the sensor and generates
Analog signal, then the analog signal is converted to, the gateway is sent to by the CAN bus after digital signal.
2. communication system as described in claim 1, which is characterized in that
The communication system further includes：
Central processing unit is connect with the gateway, is communicated with each substation by the gateway.
3. communication system as claimed in claim 2, which is characterized in that
The gateway has serial line interface, and the central processing unit is connect by the serial line interface with the gateway.
4. communication system as described in any one of claims 1-3, which is characterized in that
The communication system further includes：
Host computer is connect with the gateway, is communicated with each substation by the gateway, the parameter of each substation is arranged.
5. communication system as claimed in claim 4, which is characterized in that
The host computer is connect by RS232 interface with the gateway.
6. communication system as described in any one of claims 1-3, which is characterized in that
The substation includes serial line interface, is connect with the working equipment for working in industry control occasion by the serial line interface.
7. communication system as claimed in claim 6, which is characterized in that
The serial line interface of the substation is RS232 interface or RS485 interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721579819.3U CN207612273U (en) | 2017-11-23 | 2017-11-23 | A kind of communication system based on CAN bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721579819.3U CN207612273U (en) | 2017-11-23 | 2017-11-23 | A kind of communication system based on CAN bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207612273U true CN207612273U (en) | 2018-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721579819.3U Active CN207612273U (en) | 2017-11-23 | 2017-11-23 | A kind of communication system based on CAN bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207612273U (en) |
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2017
- 2017-11-23 CN CN201721579819.3U patent/CN207612273U/en active Active
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Effective date of registration: 20221009 Address after: 323006 801 Bi Xing street, Bi Hu Town, Liandu District, Lishui, Zhejiang. Patentee after: AnPac Bio-Medical Science (Lishui) Co.,Ltd. Address before: 200025 room 316, 105 Sinan Road, Huangpu District, Shanghai Patentee before: CHANG HE BIO-MEDICAL SCIENCE (YANGZHOU) CO.,LTD. |