CN203180931U - Fiber network system - Google Patents
Fiber network system Download PDFInfo
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- CN203180931U CN203180931U CN 201220589180 CN201220589180U CN203180931U CN 203180931 U CN203180931 U CN 203180931U CN 201220589180 CN201220589180 CN 201220589180 CN 201220589180 U CN201220589180 U CN 201220589180U CN 203180931 U CN203180931 U CN 203180931U
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- optical fiber
- fiber network
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- light
- communications module
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Abstract
The utility model discloses a fiber network system comprising a local side device and more than one terminal devices; the local side device and terminal devices are connected through fibers to form a single-loop or a double-loop serial fiber network; the local side device and the terminal devices are respectively connected with an optical communication module; the optical communication module is provided with one or two optical receiving terminals and one or two light sending terminals; and the fibers are connected on the optical receiving terminals and the optical receiving terminals. The fiber network system provides the novel fiber network system, employs a method that the system is used to solve an error code problem in a power communication system employing asynchronous data transmission, so the key problem of asynchronous data transmission in power fiber communication is solved, and the fiber network system is beneficial for promoting the development of power fiber high speed communication network.
Description
Technical field
The utility model discloses a kind of optical fiber network system, particularly a kind of optical fiber network system.
Background technology
Along with development of fiber technology, optical fiber transmission technique is used more and more widely in people's daily life, at present, in the power optical fiber communication system, a kind of optical fiber communication scheme that adopts is that local side apparatus (such as concentrator) and polylith terminal equipment (such as ammeter) are connected and composed loop by optical module and fiber optic serial, forms optical fiber network system.Have optical transmission module and Optical Receivers on local side apparatus wherein (such as concentrator) and each terminal equipment (such as ammeter), during communication, the order data of asynchronous communication is to send through the optical transmission module of electric light conversion back from local side apparatus (such as concentrator), light signal is sent to the Optical Receivers of neighboring terminals equipment (such as ammeter) by optical fiber, this moment, data were when being passed to terminal equipment (such as ammeter), also sent to next terminal equipment (such as ammeter) by the optical transmission module of this terminal equipment, through whole fiber optic network serial loop, data turn back to local side apparatus (such as concentrator) at last, and the data that terminal equipment (such as ammeter) is replied also will send to local side apparatus (such as concentrator) by this serial loop.Because the Optical Transmit Unit of optical transmission module has conditions of streaking, have the phenomenon of pulse width variations in the transmission data after the transmission of binary logic-high signal through Optical Receivers and light emission module unavoidably, directly upload defeated mode at multi-stage fiber node loop if adopt above-mentioned asynchronous communication data, the data logic level signal whenever is transmitted one group of Optical Receivers and light emission module, pulsewidth will change once, after the process Optical Receivers and light emission module of some, data logic level signal pulsewidth will have unusual than large deviation, be easy to cause error code, so that information errors.
Summary of the invention
Directly transmit by serial optical fiber at the above-mentioned asynchronous communication data of mentioning of the prior art, cause the phenomenon of error code easily, the utility model provides a kind of new optical fiber network system, it adopts fiber optic network and the data transmission method of special construction, it is transmitted the data elder generation negate that receives again, can effectively avoid the phenomenon of pulse stretcher.
The technological means that its technical problem that solves the utility model adopts is: a kind of optical fiber network system, this system comprises local side apparatus and more than one terminal equipment, local side apparatus and each terminal equipment connect into monocycle or dicyclo serial fiber optic network by optical fiber, be connected with optical communications module respectively on described local side apparatus and each terminal equipment, have one or two light-receiving terminal and one or two light transmission terminal on the optical communications module, optical fiber is connected the light-receiving terminal and light sends on the terminal.
The technological means that the utility model adopts further comprises:
Described optical communications module comprises processor control unit, logical block and power subsystem, the light-receiving terminal is connected on the input interface of logical block, an I/O mouth of processor control unit is connected on another interface of logical block, light sends terminal and is connected on the output interface of logical block, the light-receiving terminal is connected on another I/O mouth of processor control unit simultaneously, processor control unit control logic cell operation, power subsystem are given other unit power supplies.
Described optical communications module comprises one group or two groups of logical blocks.
Described logical block is logic gates.
Described optical communications module is connected on local side apparatus and the terminal equipment by the UART interface.
Described local side apparatus is concentrator, and described terminal equipment is ammeter, water meter, gas meter or gas meter, flow meter.
The beneficial effects of the utility model are: the utility model proposes a kind of new optical fiber network system and the method that occurs error code by employing asynchronous communication transmission data in this system's solution power communication system, solve the key issue of the simultaneous asynchronous data transmissions in the power optical fiber communication, be conducive to promote the development of power optical fiber high-speed communicating network.
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Description of drawings
Fig. 1 is B, Y in the utility model, each signal schematic representation of T, R.
Fig. 2 is electricity meter-reading optical fiber network system schematic diagram in the utility model.
Fig. 3 is the optical module structural representation in the utility model.
Fig. 4 adopts A, B mode transfer process schematic diagram in the utility model.
Embodiment
Present embodiment is the utility model preferred implementation, and other all its principles are identical with present embodiment or approximate with basic structure, all within the utility model protection range.
Please referring to accompanying drawing 1, reception signal with optical communications module in the utility model is referred to as the B signal, the transmission signal of optical communication module is referred to as Y(driving tube place) signal, the signal that sends to terminal equipment (such as ammeter) is referred to as the T signal, and the signal that terminal equipment (such as ammeter) sends is referred to as the R signal.In the present embodiment, the optical communications module self working mode is defined as: send to terminal equipment (such as ammeter) a tunnel, the T signal equals the reverse signal that B signal or T signal equal the B signal; Send to next stage terminal equipment (such as ammeter) a tunnel, when forward mode was the A pattern, Y-signal equaled the R signal of T signal and a last terminal equipment (such as ammeter); And reverse mode is when being the B pattern, and Y-signal equals the reverse signal of the R signal of T signal and a last terminal equipment (such as ammeter).
Please referring to accompanying drawing 2 and accompanying drawing 3, optical fiber network system in the utility model comprises that a local side apparatus is (in the present embodiment, be that example is specifically described with concentrator as local side apparatus) and more than one terminal equipment (in the present embodiment, be that example is specifically described with ammeter as local side apparatus), in the present embodiment, (optical communications module can be used as the part of terminal equipment and local side apparatus to be connected with optical communications module on concentrator and the ammeter respectively, or peripheral hardware separately), in the present embodiment, optical communications module is connected with ammeter with concentrator by the UART mouth, have one or two light-receiving terminal on the optical communications module (in the present embodiment, be called for short FR), the quantity of light-receiving terminal still is that the dicyclo fiber optic network is decided on the monocycle fiber optic network, when using the monocycle fiber optic network, all ammeter terminals connect by the serial optical fiber link, and data then are to transmit along optical fiber link, at this moment, connecting a light-receiving terminal on the optical communications module gets final product; And when using the dicyclo fiber optic network, it is a kind of method of redundancy fault-tolerant, is on the basis of monocycle fiber optic network, additionally added a similarly reverse monocycle, the communication disruption that can prevent the monocycle fibre circuit from damaging and produce at this moment, is connected with two light-receiving terminals on the optical communications module.Also have one or two light on the optical communications module and send terminal (in the present embodiment, abbreviation FT) quantity of light transmission terminal still is that the dicyclo fiber optic network is decided on the monocycle fiber optic network, when setting up the monocycle fiber optic network, a light-receiving terminal just is set, when setting up the dicyclo fiber optic network, two light-receiving terminals just are set, and optical fiber is connected on FR and the FT, and concentrator and each ammeter are connected into monocycle or dicyclo fiber optic network by optical fiber.Please referring to accompanying drawing 3, in this example, optical communications module comprises the processor control unit, logical block is (in the present embodiment, logical block adopts logic gates) and power subsystem, FR and FT are connected on the logical block, the data terminal of logical block with directly be connected with the processor control unit by the UART interface simultaneously, FR is connected with the I/O mouth of processor control unit, FR will receive signal and send into the processor control unit simultaneously and carry out level analysis, processor control unit control logic cell operation, power subsystem is given other unit power supplies, in the present embodiment, include two groups of logical blocks in the optical communications module, when specifically implementing, also one group of logical block can only be set.In the present embodiment, the processor control unit, namely MCU mainly is responsible for detecting the level situation that receives, and in the present embodiment, adopts S1 signal controlling logical block, with the signal that guarantees that reception is correct; When sending, same according to detecting the received signal level situation, with S2 signal controlling logical block, to realize the forwarding of different mode in addition.
In above-described embodiment, be that example is specifically described so that system and method for the present utility model is applied in the ammeter, when specifically implementing, the utility model can also be applied in the reading transcribing systems such as water meter, gas meter, gas meter, flow meter, and usage is identical.
The utility model in use, utilize the principle of asynchronous communication generation error code to solve the problem of error code, because the conditions of streaking of Optical Transmit Unit has caused the phenomenon that binary logic-high signal pulsewidth broadens in the transmission data, in three grades of nodes (i.e. node more than three or three) serial link, the phenomenon of high level pulse stretcher has taken place in the data-signal of second node reception, this time only need be with the data-signal negate, then pulsewidth becomes high level after by the low level negate of constriction, it is through recovering normal after the pulse stretcher phenomenon of next stage, so the 3rd node will receive the accurate data signal.Utilize this principle, only need then can correct pulse stretcher at node at interval earlier to the data-signal negate, thus the data transmission error phenomenon of solution plural serial stage node link.In the present embodiment, the node to the data-signal negate not is operated in the forward forward mode, or be called the A pattern, under this kind pattern, if contain control command in the data-signal, then control command is directly effective to this node, namely this node is directly controlled, and the node that data-signal carries out negate earlier is operated in reverse forward mode, or be called the B pattern, under this kind pattern, if contain control command in the data-signal, then effective to this node after the control command negate, be about to after the negate of control command signal this node be controlled.
In the utility model, optical communications module is selected mode of operation adaptively by analyzing the data-signal that receives, be A pattern or B pattern, optical communications module possesses data selectivity transparent transmission function simultaneously, be that it can block its own transmission data, and the data that send of other module of transparent transmission link the inside only, thereby avoided the generation of data storms.In the present embodiment, optical communications module can be differentiated the data-signal that receives by following dual mode: one, the level of optical communications module during by judgment data signal idle condition decides mode of operation, concrete principle is that serial ports is high level when idle condition, if data-signal by negate after, then idle condition will become low level, level during by the data detection signal idle condition can decision data in previous stage whether by negate, thereby judge the mode of operation of a last node, the mode of operation of this node is as long as just can reach pulsewidth rectification on the contrary with a last node, thus the problem of solution data transmission error code.When this scheme of employing, the mode of operation of multistage node is ABABABABAB or ABABABABABA.Two, optical communications module decides self working mode by the duty ratio of the high-low level of a data bit of data detection signal.If concrete principle is that the data bit high level is wideer than low level, illustrate that then data-signal is by the forward broadening, then this node should be operated in reverse transparent transmission mode (being the B pattern) so that data-signal is corrected, opposite, if the data bit high level is identical with low level width or high level is narrower than low level, illustrate that then data-signal has been reversed broadening, then this node should be operated in forward transparent transmission mode (being the A pattern).
The utility model proposes a kind of new optical fiber network system, and by adopting asynchronous communication data optical fiber to transfer out the method for existing error code in this system's solution power communication system, solve the key issue of the simultaneous asynchronous data transmissions in the power optical fiber communication, be conducive to promote the development of power optical fiber high-speed communicating network.
Claims (6)
1. optical fiber network system, it is characterized in that: described system comprises local side apparatus and more than one terminal equipment, local side apparatus and each terminal equipment connect into monocycle or dicyclo serial fiber optic network by optical fiber, be connected with optical communications module respectively on described local side apparatus and each terminal equipment, have one or two light-receiving terminal and one or two light transmission terminal on the optical communications module, optical fiber is connected the light-receiving terminal and light sends on the terminal.
2. optical fiber network system according to claim 1, it is characterized in that: described optical communications module comprises processor control unit, logical block and power subsystem, the light-receiving terminal is connected on the input interface of logical block, an I/O mouth of processor control unit is connected on another interface of logical block, light sends terminal and is connected on the output interface of logical block, the light-receiving terminal is connected on another I/O mouth of processor control unit simultaneously, processor control unit control logic cell operation, power subsystem are given other unit power supplies.
3. optical fiber network system according to claim 1, it is characterized in that: described optical communications module comprises one group or two groups of logical blocks.
4. according to claim 2 or 3 described optical fiber network systems, it is characterized in that: described logical block is logic gates.
5. according to claim 1 or 2 or 3 described optical fiber network systems, it is characterized in that: described optical communications module is connected on local side apparatus and the terminal equipment by the UART interface.
6. according to claim 1 or 2 or 3 described optical fiber network systems, it is characterized in that: described local side apparatus is concentrator, and described terminal equipment is ammeter, water meter, gas meter or gas meter, flow meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220589180 CN203180931U (en) | 2012-11-09 | 2012-11-09 | Fiber network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220589180 CN203180931U (en) | 2012-11-09 | 2012-11-09 | Fiber network system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203180931U true CN203180931U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220589180 Expired - Fee Related CN203180931U (en) | 2012-11-09 | 2012-11-09 | Fiber network system |
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| CN (1) | CN203180931U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360408A (en) * | 2018-08-14 | 2019-02-19 | 深圳芯珑电子技术有限公司 | A kind of data communications method based on plastic optical fiber |
-
2012
- 2012-11-09 CN CN 201220589180 patent/CN203180931U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109360408A (en) * | 2018-08-14 | 2019-02-19 | 深圳芯珑电子技术有限公司 | A kind of data communications method based on plastic optical fiber |
| CN109360408B (en) * | 2018-08-14 | 2023-06-23 | 深圳芯珑电子技术有限公司 | Data communication method based on plastic optical fiber |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20161109 |
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| CF01 | Termination of patent right due to non-payment of annual fee |