CN204517818U - The fiber optic transmission system of industry spot communication - Google Patents
The fiber optic transmission system of industry spot communication Download PDFInfo
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- CN204517818U CN204517818U CN201520093168.1U CN201520093168U CN204517818U CN 204517818 U CN204517818 U CN 204517818U CN 201520093168 U CN201520093168 U CN 201520093168U CN 204517818 U CN204517818 U CN 204517818U
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Abstract
A kind of fiber optic transmission system of industry spot communication, utilize plastic fiber as transmission medium, plastic fiber has the advantage such as softness, counter-bending, vibration resistance, radioresistance, low price, easy construction, and adopt plastic fiber transmission have bandwidth, fail safe high, not easily divulge a secret, the characteristic such as signal attenuation is low, the error rate is low, anti-lightning ability is strong, make equipment with communicate all more reliable, and cheap.Above-mentioned communicator and communication system, do not need to adopt the complicated circuit such as encoding and decoding and carrier wave, be easy to integrated, simple and practical.
Description
Technical field
The utility model relates to fibre optic data transmission field, particularly relates to the fiber optic transmission system of a kind of industry spot communication.
Background technology
Along with broad development and the application of frequency converter product, industry spot adopts the pattern of centralized management, distributed controll usually.All slave computers (as frequency converter) all control foremost at each equipment, to the centralized management of armamentarium, all need to carry out transfer of data through communication network.In slave computer frequency converter, communication many employings 485 and 232 communication port connects, but because a lot of application places environment is relatively more severe, spatial electromagnetic interference ratio is comparatively serious, the poor reliability of exchanges data, in a lot of situation, error rates of data is high, and equipment controls and data acquisition is subject to serious test.Some site of deployment has high pressure contact discharge and atmospherical discharges situation, often causes the damage of PORT COM and equipment.And a lot of transition of communications device is owing to adopting the circuit such as encoding and decoding and carrier wave on the market, there is device and realize the problems such as complicated, expensive, switching device circuit is not easy of integration.
Utility model content
Based on this, be necessary the fiber optic transmission system that a kind of reliable, cheap, easy of integration industry spot communication is provided.
A fiber optic transmission system for industry spot communication, comprises host computer, the first industrial communication interface, the first level shifting circuit, the first signal shaping drive circuit, the first fiber optical transceiver, plastic fiber, the second fiber optical transceiver, secondary signal plastic drive circuit, second electrical level change-over circuit, the second industrial communication interface and slave computer;
Data-signal sends from described host computer, described first level shifting circuit is transferred to by described first industrial communication interface, data-signal after level conversion transfers to described first signal shaping drive circuit, data-signal after shaping drives transfers to described plastic fiber by described first fiber optical transceiver, described second fiber optical transceiver receives data-signal and transfers to secondary signal plastic drive circuit, data-signal after shaping drives transfers to described second electrical level change-over circuit, data-signal after level conversion is sent to described slave computer by described second industrial communication interface,
And/or
Data-signal sends from described slave computer, described second electrical level change-over circuit is transferred to by described second industrial communication interface, data-signal after level conversion transfers to described secondary signal plastic drive circuit, data-signal after shaping drives transfers to described plastic fiber by described second fiber optical transceiver, described first fiber optical transceiver receives data-signal and transfers to the first signal shaping drive circuit, data-signal after shaping drives transfers to described first level shifting circuit, data-signal after level conversion is sent to described host computer by described first industrial communication interface.
Wherein in an embodiment, the diameter of described plastic fiber is 1mm.
Wherein in an embodiment, described first industrial communication interface and the second industrial communication interface are at least one in 232 communication interfaces, 485 communication interfaces, CAN communication interface, LONWORKS communication interface, PROFIBUS communication interface, FF communication interface, HART communication interface, MODBUS communication interface, WORLDFIP communication interface.
Wherein in an embodiment, described first industrial communication interface and the second industrial communication interface are 232 communication interfaces.
Wherein in an embodiment, described first level shifting circuit and second electrical level change-over circuit include the electrical level conversion chip of MAX232 series.
Wherein in an embodiment, described first industrial communication interface and the second industrial communication interface are 485 communication interfaces.
Wherein in an embodiment, described first level shifting circuit and second electrical level change-over circuit include the electrical level conversion chip of MAX483 series.
Wherein in an embodiment, described first fiber optical transceiver and the second fiber optical transceiver include fiber optic emitter and fiber optic receiver.
Wherein in an embodiment, described host computer is computer or PLC.
Wherein in an embodiment, described slave computer is frequency converter.
Above-mentioned communicator and communication system, utilize plastic fiber as transmission medium, plastic fiber has the advantage such as softness, counter-bending, vibration resistance, radioresistance, low price, easy construction, and adopt plastic fiber transmission have bandwidth, fail safe high, not easily divulge a secret, the characteristic such as signal attenuation is low, the error rate is low, anti-lightning ability is strong, make equipment with communicate all more reliable, and cheap.Above-mentioned communicator and communication system, do not need to adopt the complicated circuit such as encoding and decoding and carrier wave, be easy to integrated, simple and practical.
Accompanying drawing explanation
Fig. 1 is the module diagram of the fiber optic transmission system of industry spot communication;
Fig. 2 is the level shifting circuit schematic diagram comprising MAX232 series electrical level conversion chip;
Fig. 3 is the level shifting circuit schematic diagram comprising MAX483 series electrical level conversion chip;
Fig. 4 is the circuit diagram of fiber optical transceiver.
Embodiment
For the ease of understanding the utility model, below with reference to relevant drawings, the utility model is described more fully.Preferred embodiment of the present utility model is given in accompanying drawing.But the utility model can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make the understanding of disclosure of the present utility model more comprehensively thorough.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model understand usually.The object of the term used in specification of the present utility model herein just in order to describe specific embodiment, is not intended to limit the utility model.Term as used herein "and/or" comprises arbitrary and all combinations of one or more relevant Listed Items.
Fig. 1 is the module diagram of the fiber optic transmission system of industry spot communication.
A fiber optic transmission system for industry spot communication, comprises host computer 110, first industrial communication interface 120, first level shifting circuit 130, first signal shaping drive circuit 140, first fiber optical transceiver 150, plastic fiber 300, second fiber optical transceiver 250, secondary signal plastic drive circuit 240, second electrical level change-over circuit 230, second industrial communication interface 220 and slave computer 210.
The process that data-signal is transferred to slave computer 210 from host computer 110 is:
Data-signal sends from host computer 110, the first level shifting circuit 130 is transferred to by the first industrial communication interface 120, data-signal after level conversion transfers to the first signal shaping drive circuit 140, data-signal after shaping drives transfers to plastic fiber 300 by the first fiber optical transceiver 150, second fiber optical transceiver 250 receives data-signal and transfers to secondary signal plastic drive circuit 240, data-signal after shaping drives transfers to second electrical level change-over circuit 230, data-signal after level conversion is sent to slave computer 210 by the second industrial communication interface 220.
The process that data-signal is transferred to host computer 110 from slave computer 210 is:
Data-signal sends from slave computer 210, second electrical level change-over circuit 230 is transferred to by the second industrial communication interface 220, data-signal after level conversion transfers to secondary signal plastic drive circuit 240, data-signal after shaping drives transfers to plastic fiber 300 by the second fiber optical transceiver 250, first fiber optical transceiver 150 receives data-signal and transfers to the first signal shaping drive circuit 140, data-signal after shaping drives transfers to the first level shifting circuit 130, data-signal after level conversion is sent to host computer 110 by the first industrial communication interface 120.
Host computer 110 can be computer, PLC, human-computer interface device (HMI, Human MachineInterface).There is communication interface (i.e. the first industrial communication interface 120) in host computer 110, host computer 110 carries out controlling flowing to from communication port with the control command gathered and flowing out.
First industrial communication interface 120 and the second industrial communication interface 220 are at least one in 232 (RS232) communication interface, 485 (RS485) communication interface, CAN communication interface, LONWORKS communication interface, PROFIBUS communication interface, FF communication interface, HART communication interface, MODBUS communication interface, WORLDFIP communication interface.In the present embodiment, for 232 (RS232) communication interface, 485 (RS485) communication interface.
When the first industrial communication interface 120 and the second industrial communication interface 220 are 232 (RS232) communication interface, the first level shifting circuit 130 and second electrical level change-over circuit 230 include the electrical level conversion chip of MAX232 series.When the first industrial communication interface 120 and the second industrial communication interface 220 are 485 (RS485) communication interface, the first level shifting circuit 130 and second electrical level change-over circuit 230 include the electrical level conversion chip of MAX483 series.
Data-signal, through the first level shifting circuit 130, converts Optical Fiber Transmission to the data-signal that host computer 110 sends and to adapt level; Or data-signal is through the first level shifting circuit 130, what the first fiber optical transceiver 150 was received converts the first industrial communication interface 120 to adapt level with the data-signal after the first signal shaping drive circuit 140 shaping.
Conversely, data-signal, through second electrical level change-over circuit 230, converts Optical Fiber Transmission to the data-signal that slave computer 210 sends and to adapt level; Or data-signal is through second electrical level change-over circuit 230, what the second fiber optical transceiver 250 was received converts the second industrial communication interface 220 to adapt level with the data-signal after secondary signal plastic drive circuit 240 shaping.
Fig. 2 is the level shifting circuit schematic diagram comprising MAX232 series electrical level conversion chip, and Fig. 3 is the level shifting circuit schematic diagram comprising MAX483 series electrical level conversion chip.
RS232 signal is converted to the Transistor-Transistor Logic level signal needed for plastic drive circuit input; Because serial ports reception and transmission are two autonomous channels, so there is not control transfer process.In Fig. 2, the pump of serial port rises circuit is a preferred circuit, achieves the converting transmission function of RS232 signal to Transistor-Transistor Logic level signal.
In Fig. 3, differential level signal is converted to the Transistor-Transistor Logic level signal needed for shaping circuit input; This part have employed RS485 automatic reception and sends change-over circuit, does not need to carry out RS485 and receive and dispatch the enable of port signal in circuit realiration.In order to realize RS485 intelligent conversion, resistance pull-up must be carried out on RS485 interface 485A, and carry out resistive pull-downs on RS485 interface 485B, determine level logic " 1 " signal to provide one on port.At RS485 signal sending end T-485, adopt and send data-conversion as MAX483 data enable end, be high level under inverter 7414 front end ensures normality with a pull-up resistor.Oppositely, the Enable Pin of control MAX483 is low level, and MAX483 chip operation is in accepting state.When transmission data are low level, Enable Pin is high level, and MAX483 chip transfers transmission state to, and chip sends a low level signal automatically.After adopting circuit above, realization received, send and automatically change, eliminate the control of intermediate point chip.
First signal shaping drive circuit 140 and secondary signal plastic drive circuit 240 are for going interference, strengthening driving to data-signal.First fiber optical transceiver 150 and the second fiber optical transceiver 250 include fiber optic emitter and fiber optic receiver, are respectively used to launching fiber signal and receive fiber-optic signal.
Fig. 4 is the circuit diagram of fiber optical transceiver.
Plastic fiber 300 is the primary link passage of data signal communication, transmits because have employed light signal, so the anti-interference and electrostatic surge of communication, suppress instantaneous peak voltage successful.The diameter of plastic fiber is 1mm, owing to have employed the low plastic fiber of price, ensures the cost that realizes and can meet the transmission of on-the-spot distance.
Above-mentioned communicator and communication system, utilize plastic fiber as transmission medium, plastic fiber has the advantage such as softness, counter-bending, vibration resistance, radioresistance, low price, easy construction, and adopt plastic fiber transmission have bandwidth, fail safe high, not easily divulge a secret, the characteristic such as signal attenuation is low, the error rate is low, anti-lightning ability is strong, make equipment with communicate all more reliable, and cheap.Above-mentioned communicator and communication system, do not need to adopt the complicated circuit such as encoding and decoding and carrier wave, be easy to integrated, simple and practical.
The above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. the fiber optic transmission system of an industry spot communication, it is characterized in that, comprise host computer, the first industrial communication interface, the first level shifting circuit, the first signal shaping drive circuit, the first fiber optical transceiver, plastic fiber, the second fiber optical transceiver, secondary signal plastic drive circuit, second electrical level change-over circuit, the second industrial communication interface and slave computer;
Data-signal sends from described host computer, described first level shifting circuit is transferred to by described first industrial communication interface, data-signal after level conversion transfers to described first signal shaping drive circuit, data-signal after shaping drives transfers to described plastic fiber by described first fiber optical transceiver, described second fiber optical transceiver receives data-signal and transfers to secondary signal plastic drive circuit, data-signal after shaping drives transfers to described second electrical level change-over circuit, data-signal after level conversion is sent to described slave computer by described second industrial communication interface,
And/or
Data-signal sends from described slave computer, described second electrical level change-over circuit is transferred to by described second industrial communication interface, data-signal after level conversion transfers to described secondary signal plastic drive circuit, data-signal after shaping drives transfers to described plastic fiber by described second fiber optical transceiver, described first fiber optical transceiver receives data-signal and transfers to the first signal shaping drive circuit, data-signal after shaping drives transfers to described first level shifting circuit, data-signal after level conversion is sent to described host computer by described first industrial communication interface.
2. the fiber optic transmission system of industry spot communication according to claim 1, it is characterized in that, the diameter of described plastic fiber is 1mm.
3. the fiber optic transmission system of industry spot communication according to claim 1, it is characterized in that, described first industrial communication interface and the second industrial communication interface are at least one in 232 communication interfaces, 485 communication interfaces, CAN communication interface, LONWORKS communication interface, PROFIBUS communication interface, FF communication interface, HART communication interface, MODBUS communication interface, WORLDFIP communication interface.
4. the fiber optic transmission system of industry spot communication according to claim 3, it is characterized in that, described first industrial communication interface and the second industrial communication interface are 232 communication interfaces.
5. the fiber optic transmission system of industry spot communication according to claim 4, it is characterized in that, described first level shifting circuit and second electrical level change-over circuit include the electrical level conversion chip of MAX232 series.
6. the fiber optic transmission system of industry spot communication according to claim 3, it is characterized in that, described first industrial communication interface and the second industrial communication interface are 485 communication interfaces.
7. the fiber optic transmission system of industry spot communication according to claim 6, it is characterized in that, described first level shifting circuit and second electrical level change-over circuit include the electrical level conversion chip of MAX483 series.
8. the fiber optic transmission system of industry spot communication according to claim 1, it is characterized in that, described first fiber optical transceiver and the second fiber optical transceiver include fiber optic emitter and fiber optic receiver.
9. the fiber optic transmission system of industry spot communication according to claim 1, it is characterized in that, described host computer is computer or PLC.
10. the fiber optic transmission system of industry spot communication according to claim 1, it is characterized in that, described slave computer is frequency converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520093168.1U CN204517818U (en) | 2015-02-09 | 2015-02-09 | The fiber optic transmission system of industry spot communication |
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| CN201520093168.1U CN204517818U (en) | 2015-02-09 | 2015-02-09 | The fiber optic transmission system of industry spot communication |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106202903A (en) * | 2016-07-04 | 2016-12-07 | 广州瑞康本圣生物科技有限公司 | Internet of Things wisdom hospital event Flow driving engine method |
| CN106200547A (en) * | 2016-09-12 | 2016-12-07 | 广州市心德实业有限公司 | A kind of MVR technique antidisturbance control system |
| CN106647490A (en) * | 2016-12-19 | 2017-05-10 | 台州伟博环保设备科技有限公司 | Plasma generator power supply control system |
| CN107038672A (en) * | 2016-12-24 | 2017-08-11 | 河南省精神病医院 | A kind of mental hygiene administration of rehabilitation services system |
-
2015
- 2015-02-09 CN CN201520093168.1U patent/CN204517818U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106202903A (en) * | 2016-07-04 | 2016-12-07 | 广州瑞康本圣生物科技有限公司 | Internet of Things wisdom hospital event Flow driving engine method |
| CN106200547A (en) * | 2016-09-12 | 2016-12-07 | 广州市心德实业有限公司 | A kind of MVR technique antidisturbance control system |
| CN106647490A (en) * | 2016-12-19 | 2017-05-10 | 台州伟博环保设备科技有限公司 | Plasma generator power supply control system |
| CN107038672A (en) * | 2016-12-24 | 2017-08-11 | 河南省精神病医院 | A kind of mental hygiene administration of rehabilitation services system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20180209 |
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| CF01 | Termination of patent right due to non-payment of annual fee |