CN103885357A - Multiprotocol oil machine communication concentrator and communication method - Google Patents
Multiprotocol oil machine communication concentrator and communication method Download PDFInfo
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- CN103885357A CN103885357A CN201310740047.7A CN201310740047A CN103885357A CN 103885357 A CN103885357 A CN 103885357A CN 201310740047 A CN201310740047 A CN 201310740047A CN 103885357 A CN103885357 A CN 103885357A
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Abstract
The invention relates to the field of information automated management used for refueling devices of a gas station, and discloses a multiprotocol oil machine communication concentrator comprising a bus control device, same-direction bus driving devices, a reverse-direction bus driving device, optical coupler isolation devices and a communication interface device. The bus control device is respectively connected with the same-direction bus driving devices and the reverse-direction bus driving device. The optical coupler isolation devices are connected between the same-direction bus driving devices and the communication interface device and connected between the reverse-direction bus driving device and the communication interface device respectively. The invention also discloses a multiprotocol oil machine communication method. Advantages of the multiprotocol oil machine communication concentrator are that the multiprotocol oil machine communication concentrator is simple in circuit structure, great in compatibility, compatible with various existing communication protocols, higher in anti-interference capability, high in security and higher in application value.
Description
Technical field
The present invention relates to the information automation field for refuelling station's refueling device, particularly a kind of multi-protocols merge oil machine communication hub device and a kind of multi-protocols oil machine communication means.
Background technology
Oil is strategic resource, involves the interests of the state and the people and national defense safety.Along with developing rapidly of Chinese oil product retail trade, foreign capitals oil company actively pours in, and necessity and the importance of filling station networkization management become increasingly conspicuous.Information center need to be by the analysis of real-time information being determined to the petrochemical industry commodity output of petrochemical enterprise, and be reasonably each refuelling station or oiling center, region allotment petroleum chemicals quantity.Be not difficult to find out thus the informationalized importance of petroleum chemical enterprise.
The relative developed country of automatic management of refuelling station of China starts late.Although current domestic refuelling station number is various, scale, technical equipment, automaticity, service item and service level all far can not meet the demand in market.
At present, domestic equipment In Oil Service Station is outmoded, and automaticity is low, and these have all had a strong impact on the raising of gasoline station management level.Because the agreement between different equipment In Oil Service Station manufacturer is different with interface, cause Operation and Maintenance difficulty between refuelling station's management and control devices and fuel-servicing equipment.There is device protocol separately in each manufacturer, and in the time that refuelling station carries out renewal of the equipment, the replacing of equipment is limited by production firm.Be not difficult to find out, the bottleneck of China's fuel station informationization management, the one, lack the definition of fuel station informationization management and the specification of scope; The 2nd, the communication protocol variation of the management and control devices such as oil machine and not open, basic data acquisition difficulty.Wherein, thus incompatible between agreement variation and the open the old and new's equipment causing is maximum difficult point.Therefore, be necessary to develop a kind of novel communicator that can be compatible with multi-protocols.
Summary of the invention
The present invention is directed in prior art the shortcoming that lacks communicator that can compatible multiple different communication protocol, provide a kind of multi-protocols to merge oil machine communication hub, and apply these multi-protocols and merge the multi-protocols oil machine communication means of oil machine communication hub.Multi-protocols merge oil machine communication hub has filled up the shortcoming that prior art lacks communicator that can compatible multiple different communication protocol, has filled up current blank.Further, multi-protocols oil machine communication party rule has solved the compatibling problem to multiple different communication protocol.
For achieving the above object, the present invention can take following technical proposals:
Multi-protocols merge oil machine communication hub, comprise bus control device, bus driver device, oppositely bus driver device, optical coupling isolation device, communication interface in the same way; Wherein, bus control device connects respectively bus driver device and oppositely bus driver device in the same way, is connected respectively optical coupling isolation device in the same way between bus driver device and reverse bus driver device and communication interface.
As preferably, also comprise the first data link, the first data link comprises the interconnective first bus driver device and optical coupling isolation device in the same way, the two ends of the first data link connect respectively bus control device and communication interface.
As preferably, also comprise the second data link, the second data link comprises the interconnective second bus driver device and optical coupling isolation device in the same way, the two ends of the second data link connect respectively bus control device and communication interface.
As preferably, also comprise signal control device, the bus driver device, signal control device and the optical coupling isolation device that are linked in sequence form the second data link, bus driver device is reverse bus driver device, or be the second bus driver device and oppositely bus driver device in the same way in parallel, the two ends of the second data link connect respectively bus control device and communication interface.
As preferably, described communication interface comprises any one or multiple RS-232 communication interface, RS-485 communication interface, RS-422 communication interface, two line current rings and three line current rings.
Apply the multi-protocols oil machine communication means that above-mentioned multi-protocols merge oil machine communication hub, comprise following concrete steps:
Signal output step: outer signal exports the first bus driver device in the same way to by bus control device, first in the same way bus driver device for the driving force of intensifier circuit and reduce the load factor of bus control device, first in the same way bus driver device signal is exported to optical coupling isolation device and by optical coupling isolation device, signal is delivered to communication interface;
Signal input step: communication interface exports signal optical coupling isolation device to and exports the second bus driver device in the same way to by optical coupling isolation device, second in the same way bus driver device signal is returned to bus control device, bus control device output signal.
As preferably, described signal input step also comprises following concrete steps: in the time that the second data link comprises two line current rings, two line current rings export signal to optical coupling isolation device, optical coupling isolation device first exports signal to signal control device, and signal is inputted reverse bus driver device by signal control device.
The present invention, owing to having adopted above technical scheme, has significant technique effect:
Solved equipment room due to the compatible not enough problem of the equipment room that uses different communication protocol to cause, circuit structure is simple, compatible good, has good downward compatibility, can compatible existing or emerging communication protocol; Secondly, this device still has higher antijamming capability, safe; In addition, the voltage and current parameter of this device is adjustable to mate various different manufacturers production oil machines, uses power little, and leakage signal is few, is applicable to the special occasions such as refuelling station, has good using value.
Brief description of the drawings
Fig. 1 is the connection diagram of multi-protocols oil machine communication hub.
Fig. 2 is the connection diagram of bus driver device in the same way.
Fig. 3 is another connection diagram of bus driver device in the same way.
Fig. 4 is the connection diagram of signal control device.
Fig. 5 is the connection diagram of reverse bus driver device.
Fig. 6 is the connection diagram of RS-485 communication interface and RS-422 communication interface.
Fig. 7 is the connection diagram of optical coupling isolation device in the second data link.
Fig. 8 is the connection diagram of RS-232 communication interface.
Fig. 9 is the interface signal definition schematic diagram of communication interface.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Multi-protocols merge oil machine communication hub, as shown in Fig. 1-9, comprise bus control device 100, bus driver device 200, oppositely bus driver device 300, optical coupling isolation device 400, communication interface 500 in the same way; Wherein, bus driver device 200 is the first bus driver device 201 or second bus driver device 202 in the same way in the same way in the same way, bus control device 100 connects respectively bus driver device 200 and oppositely bus driver device 300 in the same way, is connected respectively optical coupling isolation device 400 in the same way between bus driver device 200 and reverse bus driver device 300 and communication interface 500.Alternatively, to adopt model be the chip of SN74LVTH245A to bus driver device 200 in the same way, and wherein, Fig. 2 has represented first circuit connection diagram of bus driver device 201 in the same way, and Fig. 3 represents the second circuit connection diagram of bus driver device 202 in the same way.It is the chip (its circuit connecting relation as shown in Figure 5) of SN74LVTH540 that reverse bus driver device 300 adopts model.
As preferably, also comprise the first data link 600, the first data link 600 comprise interconnective first in the same way the two ends of bus driver device 201 and optical coupling isolation device 400, the first data link 600 connect respectively bus control device 100 and communication interface 500.
Further, in order to select the different communication interface of communication interface 500, between optical coupling isolation device 400 and communication interface 500, be also in series with multichannel selection control 1000.In the present embodiment, adopt intelligent signal selector switch to realize this multichannel selection control 1000, described intelligent signal selector switch utilizes 51 Single Chip Microcomputer (SCM) system as controller, the low and high level of being exported by P0.1～P0.5 pin of 51 single-chip microcomputers, provides selection and the switching controlled between 5 kinds of agreements by button or other modes.The selection of each agreement can be selected by a gauge tap, so user can select required agreement according to practical demand, simultaneously corresponding LED light lights prompting.
Preferably, intelligent signal selector switch, by the low and high level of the P0.1 pin output of 51 single-chip microcomputers, provides selection and the switching controlled between 5 kinds of agreements by button.Can utilize the number of times of button to select the required agreement of user, and have corresponding LED to indicate whether selected agreement is user-selected, be convenient to user and select.
As preferably, also comprise the second data link 700, the second data link 700 comprise interconnective second in the same way the two ends of bus driver device 202 and optical coupling isolation device 400, the second data link 700 connect respectively bus control device 100 and communication interface 500.
As preferably, also comprise signal control device 900, the bus driver device 800, signal control device 900 and the optical coupling isolation device 400 that are linked in sequence form the second data link 700, bus driver device 800 is reverse bus driver device 300, or be in parallel second in the same way bus driver device 202 and oppositely the two ends of bus driver device 300, the second data link 700 connect respectively bus control device 100 and communication interface 500.Alternatively, as shown in Figure 4, it is the chip of SN74LVTH126 that signal control device 900 adopts model.
As preferably, described communication interface 500 comprises any one or multiple RS-232 communication interface 501, RS-485 communication interface 502, RS-422 communication interface 503 and three line current rings 505.
As preferably, described communication interface 500 comprises any one or multiple RS-232 communication interface 501, RS-485 communication interface 502, RS-422 communication interface 503, two line current rings 504 and three line current rings 505.
Alternatively, RS-485 communication interface 502 and RS-422 communication interface 503 adopt SN65HVD179 chip, and its operating voltage is+5V.RS-485 communication interface 502 and RS-422 communication interface 503 comprise a differential line driver and difference incoming line receiver.Differential line driver all has independently input and output pin with difference incoming line receiver and communicates by letter for full duplex bus.SN65HVD179 chip not only can balanced transmission line, and supports different communication protocol standard, as ANSI TIA/EIA-485A, TIA/EIA-422-B etc.Differential bus driver and the receiver of this chip aim at stand-alone integrated circuit design, do not need outside enable signal.On multi-point bus transmission line, the signaling rate of its full duplex bidirectional data communication is up to 25Mbps.
Alternatively, RS-232 communication interface 501 adopts SP3232EEA chip, and as shown in Figure 8, this chip can solve RS-232 serial communication problem, is often used in portable or portable equipment.Its normal working voltage, between+3.3V～+ 5V, only needs an external 0.1 μ F electric capacity, can work efficiently and stably.For manikin and IEC1000-4-2 atmospherical discharges method of testing, the exceed ± 15kV of ESD tolerance of SP3232EEA chip.Meanwhile, RS-232 communication interface 501 also includes a low-power " shut " mode", drops to while being less than 1 μ A at source current, and driver output and the charge pump of chip are disabled.
Alternatively, two line current rings 504 or three line current rings 505 comprise one or more optocoupler, electric capacity and resistance.Optocoupler can be realized the conversion of electricity → light → electric signal, can one-way transmission signal, between input end and output terminal, realize complete electrical isolation, and antijamming capability is strong, long service life, transfer efficiency is high.Above-mentioned optocoupler adopts the chip that model is PC817A, and this chip performance is stable, and current transfer ratio is up to 80%～160%.
Above-mentioned first signal all passes through bus control chip XR16V598 output, in order to reduce bus control chip load pressure, after transmitted signal output, connect again a SN74LVTH245A chip (in the same way bus driver device 200), with the driving force of intensifier circuit.Transmitted signal is from 2 pin inputs of optical coupling isolation device 400, isolate by ISO1 optocoupler, in the time that reception signal returns, 2 pin that are connected to IS05 optocoupler receive signal input pin, through after light-coupled isolation, receive again SN74LVTH245A bus driver device in the same way, signal returns to bus control device 100 afterwards.Here it should be noted that, in the time there is two line current rings 504, should receive signal and receive the reverse bus driver device 300 of SN74LVTH540A().
After the buffer action of optical coupling isolation device 400, each communication protocol interface circuit theory diagrams are distinguished to some extent.
RS-232 communication interface 501 is directly connected to 11 pin transmitted signal input ends of U7SP3232EEA device, receives signal simultaneously and exports the 2 pin reception signal input pins that are directly connected to IS05 optocoupler by U7SP3232EEA from 12 pin.
RS-422 is directly connected to U2SN65HVD179 transmitted signal and inputs 2 pin, receives signal and exports the 2 pin reception signal input pins that are directly connected to IS05 optocoupler by U2SN65HVD179 from 3 pin.
RS-485 is half-duplex two-wire system communication mode, and 422 are full duplex three-wire system communication modes, can be by U2SN65HVD179 external circuit from winding, adding above uses SN74LVTH126 as control signal, can, by the signal blocker from winding, exist thereby only have transmitted signal on guarantee signal wire or receive signal.
Two line current rings are after the light-coupled isolation of transmitted signal process, as shown in Figure 6, need to use the triode U36 that model is S8050 to carry out oppositely (meeting the condition of fuel charger interface needs reverse signal), need control signal control device 900 to carry out blocking processing to the signal from winding simultaneously.And three line current rings do not need such reverse process and the blocking processing of signal.
The transmitted signal of above-mentioned five kinds of communication protocol interface devices and reception signal all pass through light-coupled isolation processing, have the function of signal transmission high stability.The major advantage of optocoupler is: signal one-way transmission, and input end and output terminal have been realized electrical isolation completely, and output signal affects without optocoupler input end, and antijamming capability is strong, and working stability is contactless, long service life, transfer efficiency is high.
The present embodiment also has thunder-lightning function.Principle of work---the Zener breakdown of transient diode (being 1N4004SMD) in thunder-lightning, transient voltage suppressor diode is used for Switching Power Supply, especially single-ended reverse exciting switching voltage regulator, the moment of turn-offing at switching transistor is because electromagnetic induction can produce a very strong peak-inverse voltage, if meeting breakdown switch transistor without restriction, and this peak-inverse voltage duration is very little, crest voltage is high, but contained energy is little, so discharge this due to voltage spikes with transient voltage suppressor diode, protection switch transistor, thereby ensure the stability of product under rugged surroundings.
Apply the multi-protocols oil machine communication means that above-mentioned multi-protocols merge oil machine communication hub, comprise following concrete steps:
Signal output step: outer signal exports the first bus driver device 201 in the same way to by bus control device 100, first in the same way bus driver device 201 for the driving force of intensifier circuit and reduce the load factor of bus control device 100, first in the same way bus driver device 201 signal is exported to optical coupling isolation device 400 and by optical coupling isolation device 400, signal is delivered to communication interface 500;
Signal input step: communication interface 500 exports signal optical coupling isolation device 400 to and exports the second bus driver device 202 in the same way to by optical coupling isolation device 400, second in the same way bus driver device 202 signal is returned to bus control device 100, bus control device 100 output signals.
As preferably, described signal input step also comprises following concrete steps: in the time that the second data link 700 comprises two line current rings 504, two line current rings export signal to optical coupling isolation device 400, as shown in Figure 7, optical coupling isolation device 400 first exports signal to signal control device 900, and signal is inputted reverse bus driver device 300 by signal control device 900.
Above-mentioned multi-protocols merge oil machine communication hub and also comprise a kind of can definition for the oil machine interface signal of oil machine interface RJ45, for changing at five kinds of communication interface standards, as shown in Figure 9.The definition of above-mentioned oil machine interface signal can compatible RS-232, RS-485, RS-422, CL2 and five kinds of communication interface standards of CL3.Wherein, the pin 5 of RJ45 connects GND signal, and pin 8 connects power supply signal, and pin 1 and 4 is unsettled, does not take over what signal, and other 4 pins carry out different connections according to the difference of translation-protocol and switch.Preferably, preferably oil machine interface signal definition of one is also provided, comprise, 4,6 pins of oil machine interface RJ45 connect respectively T end and the R end of RS-232 communication interface 501,2,3,6, No. 7 pins of oil machine interface RJ45 are connected with Y, Z, A, the B end of RS-422 communication interface 503 successively, 2,3,6, No. 7 pins of oil machine interface RJ45 are connected with A, the B of RS-485 communication interface 502, A, B end successively, and 2, No. 6 pins of oil machine interface RJ45 are respectively with two line current rings.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (8)
1. multi-protocols merge an oil machine communication hub, it is characterized in that, comprise bus control device (100), bus driver device (200), oppositely bus driver device (300), optical coupling isolation device (400), communication interface (500) in the same way; Wherein, bus control device (100) connects respectively bus driver device (200) and oppositely bus driver device (300) in the same way, is connected respectively optical coupling isolation device (400) in the same way between bus driver device (200) and reverse bus driver device (300) and communication interface (500).
2. multi-protocols according to claim 1 merge oil machine communication hub, it is characterized in that, also comprise the first data link (600), the first data link (600) comprises the interconnective first bus driver device (201) and optical coupling isolation device (400) in the same way, and the two ends of the first data link (600) connect respectively bus control device (100) and communication interface (500).
3. multi-protocols according to claim 1 merge oil machine communication hub, it is characterized in that, also comprise the second data link (700), the second data link (700) comprises the interconnective second bus driver device (202) and optical coupling isolation device (400) in the same way, and the two ends of the second data link (700) connect respectively bus control device (100) and communication interface (500).
4. multi-protocols according to claim 1 merge oil machine communication hub, it is characterized in that, also comprise signal control device (900), the bus driver device (800) being linked in sequence, signal control device (900) and optical coupling isolation device (400) composition the second data link (700), bus driver device (800) is reverse bus driver device (300), or be the second bus driver device (202) and oppositely bus driver device (300) in the same way in parallel, the two ends of the second data link (700) connect respectively bus control device (100) and communication interface (500).
5. merge oil machine communication hub according to the arbitrary described multi-protocols of claim 1-3, it is characterized in that, described communication interface (500) comprises any one or multiple RS-232 communication interface (501), RS-485 communication interface (502), RS-422 communication interface (503) and three line current rings (505).
6. merge oil machine communication hub according to claim 1-2,4 arbitrary described multi-protocols, it is characterized in that, described communication interface (500) comprises any one or multiple RS-232 communication interface (501), RS-485 communication interface (502), RS-422 communication interface (503), two line current rings (504) and three line current rings (505).
7. apply the multi-protocols oil machine communication means that the arbitrary described multi-protocols of the claims 1-6 merge oil machine communication hub, it is characterized in that, comprise following concrete steps:
Signal output step: outer signal exports the first bus driver device (201) in the same way to by bus control device (100), first in the same way bus driver device (201) for the driving force of intensifier circuit and reduce the load factor of bus control device (100), first in the same way bus driver device (201) signal is exported to optical coupling isolation device (400) and by optical coupling isolation device (400), signal is delivered to communication interface (500);
Signal input step: communication interface (500) exports signal optical coupling isolation device (400) to and exports the second bus driver device (202) in the same way to by optical coupling isolation device (400), second in the same way bus driver device (202) signal is returned to bus control device (100), bus control device (100) output signal.
8. multi-protocols oil machine communication means according to claim 7, it is characterized in that, described signal input step also comprises following concrete steps: in the time that the second data link (700) comprises two line current rings (504), two line current rings export signal to optical coupling isolation device (400), optical coupling isolation device (400) first exports signal to signal control device (900), and signal is inputted reverse bus driver device (300) by signal control device (900).
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Cited By (2)
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| CN105068488A (en) * | 2015-09-22 | 2015-11-18 | 托肯恒山科技（广州）有限公司 | Intelligent communication controller applicable to a variety of communication interfaces and control method |
| CN111813728A (en) * | 2020-09-02 | 2020-10-23 | 湖南慧明谦信息技术有限公司 | Multi-bus and multi-channel interface realized by single serial port multiplexing mode |
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| CN111813728B (en) * | 2020-09-02 | 2021-01-15 | 湖南慧明谦信息技术有限公司 | Multi-bus and multi-channel interface realized by single serial port multiplexing mode |
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