CN103885357B - Multi-protocols oil machine communication hub and communication means - Google Patents
Multi-protocols oil machine communication hub and communication means Download PDFInfo
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- CN103885357B CN103885357B CN201310740047.7A CN201310740047A CN103885357B CN 103885357 B CN103885357 B CN 103885357B CN 201310740047 A CN201310740047 A CN 201310740047A CN 103885357 B CN103885357 B CN 103885357B
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Abstract
The present invention relates to the information automation management domain for gas station's refueling device, disclose a kind of multi-protocols oil machine communication hub, including bus control device, in the same direction bus driver device, reverse bus driver device, optical coupling isolation device, communication interface；Wherein, bus control device connects bus driver device and reversely bus driver device in the same direction respectively, bus driver device and be reversely connected optical coupling isolation device between bus driver device and communication interface respectively in the same direction, also discloses a kind of multi-protocols oil machine communication means.It is an advantage of the current invention that circuit structure is simple, compatible good, can compatible existing various communications protocols, there is stronger capacity of resisting disturbance, safety is high, has higher using value.
Description
Technical field
The present invention relates to the information automation field for gas station's refueling device, merge oil machine communication hub device and a kind of multi-protocols oil machine communication means particularly to a kind of multi-protocols.
Background technology
Oil is strategic resource, involves the interests of the state and the people and national defense safety.Along with developing rapidly of China's 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 centre needs the petrochemical industry commodity output by the analysis of real time information determines petrochemical enterprise, and is reasonably each gas station or oiling center, region allotment petroleum chemicals quantity.Thus it is not difficult to find out the informationalized importance of petroleum chemical enterprise.
The automated management of gas station of China is started late relative to for developed country.Although current domestic gas station number is various, but scale, technical equipment, automaticity, service item and service level are all far from the demand meeting 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.Owing to the agreement between different equipment In Oil Service Station manufacturers is different with interface, cause Operation and Maintenance difficulty between gas station's management and control devices and fuel-servicing equipment.There is respective device protocol in each manufacturer, and when gas station carries out renewal of the equipment, the replacing of equipment is limited by production firm.Being not difficult to find out, the bottleneck of China's fuel station informationization management, one is the absence of definition and the specification of scope of fuel station informationization management；Two is that the communication protocol of the management and control devices such as oil machine is diversified and do not open, basic data acquisition difficulty.Wherein, agreement is diversified and open thus incompatible between the old and new's equipment of causing is maximum difficult point.Therefore, it is necessary to develop a kind of novel communicator that can be compatible with multi-protocols.
Summary of the invention
The present invention is directed to lack in prior art can the shortcoming of communicator of compatible multiple different communication protocol, it is provided that a kind of multi-protocols merge oil machine communication hub, and apply these multi-protocols to merge the multi-protocols oil machine communication means of oil machine communication hub.Multi-protocols merge oil machine communication hub filled up prior art lack can the shortcoming of communicator of compatible multiple different communication protocol, filled up current blank.Further, multi-protocols oil machine communication party rule solves 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, including bus control device, in the same direction bus driver device, reverse bus driver device, optical coupling isolation device, communication interface；Wherein, bus control device connects bus driver device and reversely bus driver device in the same direction respectively, in the same direction bus driver device and be reversely connected optical coupling isolation device between bus driver device and communication interface respectively.
As preferably, also including that the first data link, the first data link include the interconnective first bus driver device and optical coupling isolation device in the same direction, the two ends of the first data link connect bus control device and communication interface respectively.
As preferably, also including that the second data link, the second data link include the interconnective second bus driver device and optical coupling isolation device in the same direction, the two ends of the second data link connect bus control device and communication interface respectively.
As preferably, also include 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 being in parallel second bus driver device and reverse bus driver device in the same direction, the two ends of the second data link connect bus control device and communication interface respectively.
As preferably, described communication interface includes 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.
Above-mentioned multi-protocols are applied to merge the multi-protocols oil machine communication means of oil machine communication hub, including step in detail below:
Signal output step: outer signal is by bus control device output to first bus driver device in the same direction, first in the same direction bus driver device for the driving force of intensifier circuit and reduce the load factor of bus control device, first in the same direction bus driver device signal is delivered to communication interface to optical coupling isolation device and by optical coupling isolation device by signal output；
Signal input step: communication interface exports to the second bus driver device in the same direction by signal output to optical coupling isolation device and by optical coupling isolation device, second in the same direction bus driver device signal is returned bus control device, bus control device output signal.
As preferably, described signal input step also includes step in detail below: when the second data link includes two line current rings, signal is exported to optical coupling isolation device by two line current rings, signal is first exported to signal control device by optical coupling isolation device, and signal control device inputs a signal into reverse bus driver device.
Due to the fact that and have employed above technical scheme that there is significant technique effect:
The problem solving the equipment room compatibility deficiency that equipment room causes owing to using different communication protocol, circuit structure is simple, compatible good, has preferable downward compatibility, can compatible existing or emerging communication protocol；Secondly, this device still has higher capacity of resisting disturbance, and safety is high；Using power little additionally, the voltage and current parameter of this device is adjustable to mate various different manufacturers production oil machine, signal is revealed few, it is adaptable to the special occasions such as gas station, has preferable using value.
Accompanying drawing explanation
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 direction.
Fig. 3 is another connection diagram of bus driver device in the same direction.
Fig. 4 is the connection diagram of signal control device.
Fig. 5 is the connection diagram of reverse bus driver device.
Fig. 6 is RS-485 communication interface and the connection diagram of 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.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
Multi-protocols merge oil machine communication hub, as shown in figs 1-9, including bus control device 100, in the same direction bus driver device 200, reverse bus driver device 300, optical coupling isolation device 400, communication interface 500；Wherein, bus driver device 200 is the first bus driver device 201 or second bus driver device 202 in the same direction in the same direction in the same direction, bus control device 100 connects bus driver device 200 and reversely bus driver device 300 in the same direction respectively, in the same direction bus driver device 200 and be reversely connected optical coupling isolation device 400 between bus driver device 300 with communication interface 500 respectively.Alternatively, the chip that bus driver device 200 uses model to be SN74LVTH245A in the same direction, wherein, Fig. 2 illustrates the circuit connection diagram of the first bus driver device 201 in the same direction, and Fig. 3 then represents the circuit connection diagram of the second bus driver device 202 in the same direction.The chip (its circuit connecting relation is as shown in Figure 5) that reversely bus driver device 300 uses model to be SN74LVTH540.
As preferably, also include the first data link 600, first data link 600 includes the interconnective first bus driver device 201 and optical coupling isolation device 400 in the same direction, and the two ends of the first data link 600 connect bus control device 100 and communication interface 500 respectively.
Further, in order to the different communication interface of communication interface 500 is selected, between optical coupling isolation device 400 and communication interface 500, multi-path choice controller 1000 also it is in series with.In the present embodiment, intelligent signal selector is used to realize this multi-path choice controller 1000, described intelligent signal selector utilizes 51 Single Chip Microcomputer (SCM) system as controller, the low and high level exported by P0.1～the P0.5 pin of 51 single-chip microcomputers, provides the selection and switching controlled between 5 kinds of agreements by button or other modes.The selection of each agreement can be selected by a control switch, so user can select required agreement according to practical demand, the most corresponding LED light lights prompting.
Preferably, the low and high level that intelligent signal selector is exported by the P0.1 pin of 51 single-chip microcomputers, the selection and switching controlled between 5 kinds of agreements is provided by button.Can utilize the number of times of button to select the agreement needed for user, and have corresponding LED instruction selected by agreement whether be selected by user, it is simple to user selects.
As preferably, also include the second data link 700, second data link 700 includes the interconnective second bus driver device 202 and optical coupling isolation device 400 in the same direction, and the two ends of the second data link 700 connect bus control device 100 and communication interface 500 respectively.
As preferably, also include 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 being in parallel second bus driver device 202 and reverse bus driver device 300 in the same direction, the two ends of the second data link 700 connect bus control device 100 and communication interface 500 respectively.Alternatively, as shown in Figure 4, the chip that signal control device 900 uses model to be SN74LVTH126.
As preferably, described communication interface 500 includes 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 includes any one or multiple RS-232 communication interface 501, RS-485 communication interface 502, RS-422 communication interface 503, two line current ring 504 and three line current rings 505.
Alternatively, RS-485 communication interface 502 and RS-422 communication interface 503 uses SN65HVD179 chip, and its running voltage is+5V.RS-485 communication interface 502 and RS-422 communication interface 503 includes a differential line driver and differential inputs lines receptor.Differential line driver all has independent input with differential inputs lines receptor and communicates for full duplex bus with output pin.SN65HVD179 chip is possible not only to balanced transmission line, and supports different communication protocol standard, such as ANSI TIA/EIA-485A, TIA/EIA-422-B etc..The differential bus driver of this chip and receptor aim at stand-alone integrated circuit design, it is not necessary to 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 uses SP3232EEA chip, and as shown in Figure 8, this chip can solve RS-232 serial communication problem, is commonly used in portable or portable equipment.Its normal working voltage is between+3.3V～+5V, it is only necessary to an external 0.1 μ F electric capacity, can work efficiently and stably.For anthropometric dummy and IEC1000-4-2 atmospherical discharges method of testing, the ESD tolerance of SP3232EEA chip exceedes ± 15kV.Meanwhile, RS-232 communication interface 501 also includes a low-power " shut " mode", and i.e. when source current drops to less than 1 μ A, driving output and the electric charge pump of chip are disabled.
Alternatively, two line current rings 504 or three line current rings 505 include one or more optocoupler, electric capacity and resistance.Optocoupler can realize the conversion of electricity → light → signal of telecommunication, can achieve be electrically isolated completely to one-way transmission signal between input and outfan, and capacity of resisting disturbance is strong, and service life is long, and efficiency of transmission is high.Above-mentioned optocoupler uses model to be the chip of PC817A, and this chip performance is stable, and current transfer ratio is up to 80%～160%.
Above-mentioned first signal all passes through bus marco chip XR16V598 output, in order to reduce bus marco chip load pressure, a SN74LVTH245A chip (bus driver device 200 the most in the same direction) has been connect again, with the driving force of intensifier circuit after sending signal output.Send the signal 2 foot inputs from optical coupling isolation device 400, isolated by ISO1 optocoupler, when receiving signal return when, 2 feet being connected to IS05 optocoupler receive signal input pin, after light-coupled isolation, receiving again SN74LVTH245A bus driver device in the same direction, signal returns bus control device 100 afterwards.Need exist for special instruction, when there is two line current rings 504 when, it should receive signal and receive SN74LVTH540A(reverse bus driver device 300).
After the buffer action of optical coupling isolation device 400, each communication protocol interface circuit theory diagrams are otherwise varied.
RS-232 communication interface 501 is directly connected to 11 human hair combing wastes of U7SP3232EEA device and send signal input part, receives signal simultaneously and is directly connected to 2 feet reception signal input pins of IS05 optocoupler by U7SP3232EEA from 12 foot outputs.
RS-422 is directly connected to U2SN65HVD179 transmission signal and inputs 2 feet, receives signal and is directly connected to 2 feet reception signal input pins of IS05 optocoupler by U2SN65HVD179 from 3 feet outputs.
RS-485 is half-duplex two-wire system communication mode, and 422 is full duplex three-wire system communication mode, can be by U2SN65HVD179 external circuit from winding, plus SN74LVTH126 used above as control signal, can by from the signal blocker of winding, thus ensure only to send signal on holding wire or receive signal to exist.
Two line current rings are sending signal after light-coupled isolation, as shown in Figure 6, the audion U36 using model to be S8050 is needed to carry out reversely (meeting the condition of fuel charger interface needs reverse signal), simultaneously need to control signal controls device 900 carries out blocking processing to from the signal of winding.And three line current rings are not required to the blocking processing of such reverse process and signal.
The transmission signal of above-mentioned five kinds of communication protocol interface devices and reception signal all process through light-coupled isolation, have the function of transmission signal high stability.The major advantage of optocoupler is: signal one-way transmission, and input and outfan fully achieve electrical isolation, and input is affected by output signal without optocoupler, and capacity of resisting disturbance is strong, working stability, and contactless, service life is long, and efficiency of transmission is high.
The present embodiment also has thunder-lightning function.The transient diode (i.e. 1N4004SMD) operation principle Zener breakdown in thunder-lightning, transient voltage suppressor diode is used for Switching Power Supply, especially single-ended reverse exciting switching voltage regulator, peak-inverse voltage the strongest can be produced due to electromagnetic induction in the moment that switching transistor turns off, if meeting breakdown switch transistor without restriction, and this peak-inverse voltage persistent period is the least, crest voltage is high, but contained energy is little, so dischargeing this due to voltage spikes with transient voltage suppressor diode, protection switching transistor, thus ensure that the stability of product in the presence of a harsh environment.
Above-mentioned multi-protocols are applied to merge the multi-protocols oil machine communication means of oil machine communication hub, including step in detail below:
Signal output step: outer signal is exported to the first bus driver device 201 in the same direction by bus control device 100, first in the same direction 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 direction bus driver device 201 signal is delivered to communication interface 500 by signal output to optical coupling isolation device 400 and by optical coupling isolation device 400；
Signal input step: communication interface 500 is by signal output to optical coupling isolation device 400 and passes through optical coupling isolation device 400 and exports to the second bus driver device 202 in the same direction, second in the same direction bus driver device 202 signal is returned bus control device 100, bus control device 100 output signal.
As preferably, described signal input step also includes step in detail below: when the second data link 700 includes two line current rings 504, signal is exported to optical coupling isolation device 400 by two line current rings, as shown in Figure 7, signal is first exported to signal control device 900 by optical coupling isolation device 400, and signal control device 900 inputs a signal into reverse bus driver device 300.
Above-mentioned multi-protocols merge oil machine communication hub and also include a kind of oil machine interface signal definition that may be used for oil machine interface RJ45, for changing in five kinds of communication interface standards, as shown in Figure 9.The definition of above-mentioned oil machine interface signal can compatible five kinds of communication interface standards of RS-232, RS-485, RS-422, CL2 and 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 connection switchings according to the difference of translation-protocol.Preferably, additionally provide the definition of one preferably oil machine interface signal, including, 4,6 pins of oil machine interface RJ45 connect T end and the R end of RS-232 communication interface 501 respectively, 2,3,6, No. 7 pins of oil machine interface RJ45 are connected with Y, Z, A, B end of RS-422 communication interface 503 successively, 2,3,6, No. 7 pins of oil machine interface RJ45 are connected with A, B, A, B end of RS-485 communication interface 502 successively, 2, No. 6 pins of oil machine interface RJ45 respectively with two line current rings.
In a word, the foregoing is only presently preferred embodiments of the present invention, all impartial changes made according to scope of the present invention patent and modification, all should belong to the covering scope of patent of the present invention.
Claims (6)
1. multi-protocols merge oil machine communication hub, it is characterised in that include bus control device (100),
In the same direction bus driver device (200), reverse bus driver device (300), optical coupling isolation device (400),
Communication interface (500)；Wherein, bus control device (100) connects bus driver device in the same direction respectively
(200) and reversely bus driver device (300), in the same direction bus driver device (200) and the most total
Optical coupling isolation device (400) it is connected respectively between line driving means (300) with communication interface (500)；
Described multi-protocols merge oil machine communication hub and also include signal control device (900), the bus being linked in sequence
Driving means (800), signal control device (900) and optical coupling isolation device (400) composition the second number
According to link (700), bus driver device (800) is reverse bus driver device (300), or is in parallel
The second bus driver device (202) and reverse bus driver device (300), the second data link (700) in the same direction
Two ends connect bus control device (100) and communication interface (500) respectively.
Multi-protocols the most according to claim 1 merge oil machine communication hub, it is characterised in that also wrap
Include the first data link (600), the first data link (600) include interconnective first in the same direction bus drive
Dynamic device (201) and optical coupling isolation device (400), the two ends of the first data link (600) connect respectively
Connect bus control device (100) and communication interface (500).
Multi-protocols the most according to claim 1 merge oil machine communication hub, it is characterised in that also wrap
Include the second data link (700), the second data link (700) include interconnective second in the same direction bus drive
Dynamic device (202) and optical coupling isolation device (400), the two ends of the second data link (700) connect respectively
Connect bus control device (100) and communication interface (500).
4. merge oil machine communication hub according to the arbitrary described multi-protocols of claim 1-3, it is characterised in that
Described communication interface (500) include 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)。
5. merge oil machine communication hub according to the arbitrary described multi-protocols of claim 1-2, it is characterised in that
Described communication interface (500) include 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).
6. apply the arbitrary described multi-protocols fusion oil machine communication hub of the claims 1-5 many for one kind
Agreement oil machine communication means, it is characterised in that include step in detail below:
Signal output step: outer signal is by bus control device (100) output to first bus driver in the same direction
Device (201), first in the same direction bus driver device (201) for the driving force of intensifier circuit and reduce always
The load factor of thread control device (100), first in the same direction bus driver device (201) by signal export to light
Signal is also delivered to communication interface (500) by optical coupling isolation device (400) by coupling isolating device (400)；
Signal input step: communication interface (500) is by signal output to optical coupling isolation device (400)
And by optical coupling isolation device (400) output to second bus driver device (202) in the same direction, second is the most total
Signal is returned bus control device (100) by line driving means (202), and bus control device (100) is defeated
Go out signal；Described signal input step also includes step in detail below: when the second data link (700) includes
During two line current ring (504), two line current rings by signal output to optical coupling isolation device (400), optocoupler every
From device (400) first by signal output to signal control device (900), signal control device (900) will
Signal inputs reverse bus driver device (300).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310740047.7A CN103885357B (en) | 2013-12-26 | 2013-12-26 | Multi-protocols oil machine communication hub and communication means |
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| CN201310740047.7A CN103885357B (en) | 2013-12-26 | 2013-12-26 | Multi-protocols oil machine communication hub and communication means |
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| CN103885357B true CN103885357B (en) | 2016-11-23 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105068488B (en) * | 2015-09-22 | 2017-11-24 | 托肯恒山科技（广州）有限公司 | Suitable for the Intelligent communication controller and control method of various communication interfaces |
| 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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| US6607139B1 (en) * | 2002-04-19 | 2003-08-19 | Aboxom Systems, Inc. | Multi-function network card |
| CN2645134Y (en) * | 2003-08-13 | 2004-09-29 | 珠海纬通网络科技有限公司 | Line concentration network safety isolation switching device |
| CN101374115A (en) * | 2008-09-28 | 2009-02-25 | 北京鼎实创新科技有限公司 | Rapid discriminating multiport control method based on PROFIBUS packet |
| CN201274492Y (en) * | 2008-09-28 | 2009-07-15 | 北京鼎实创新科技有限公司 | PROFIBUS hub with relay function |
| CN102752194A (en) * | 2012-06-12 | 2012-10-24 | 黄程云 | Frame structure-based forwarding method and RS-485 bus hub |
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2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6607139B1 (en) * | 2002-04-19 | 2003-08-19 | Aboxom Systems, Inc. | Multi-function network card |
| CN2645134Y (en) * | 2003-08-13 | 2004-09-29 | 珠海纬通网络科技有限公司 | Line concentration network safety isolation switching device |
| CN101374115A (en) * | 2008-09-28 | 2009-02-25 | 北京鼎实创新科技有限公司 | Rapid discriminating multiport control method based on PROFIBUS packet |
| CN201274492Y (en) * | 2008-09-28 | 2009-07-15 | 北京鼎实创新科技有限公司 | PROFIBUS hub with relay function |
| CN102752194A (en) * | 2012-06-12 | 2012-10-24 | 黄程云 | Frame structure-based forwarding method and RS-485 bus hub |
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