CN201215955Y - Light transmission system - Google Patents
Light transmission system Download PDFInfo
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- CN201215955Y CN201215955Y CNU2008201148400U CN200820114840U CN201215955Y CN 201215955 Y CN201215955 Y CN 201215955Y CN U2008201148400 U CNU2008201148400 U CN U2008201148400U CN 200820114840 U CN200820114840 U CN 200820114840U CN 201215955 Y CN201215955 Y CN 201215955Y
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- light emission
- control unit
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Abstract
The utility model discloses an optical emission system, which comprises a driving circuit, an optical transmitting module which is connected with the driving circuit, and a transmitting control module which is respectively connected with the driving circuit and the optical transmitting module, wherein the driving circuit is used to generate electrical signals, the optical transmitting module which is used to convert the electrical signals generated by the driving circuit into optical signals, and to send out the optical signals, the transmitting control module is used to detect the electrical signals generated by the electrical signals, and to time the duration of the electrical signals, to close up the electrical signals when the duration of the electrical signals exceed the threshold value in order to close the optical signal transmission of the optical transmitting module. The utility model can be used to effectively solve the P O N network paralysis caused by the out-of-control of the optical signal transmission through the embodiment thereof.
Description
Technical field
The utility model relates to networking technology area, particularly a kind of light emission system.
Background technology
Along with the development of optical fiber and optical-fiber network, (Passive Optical Network, PON) network development is very fast for EPON.The PON networking with its long transmission distance, speed height, disturbed advantage little, that maintenance is little, price is low to obtain develop rapidly.At present the Ethernet protocol EPON (EthernetPassive Optical Network, EPON) and gigabit passive optical network (Gigabit-capable PassiveOptical Network, GPON) network is universal rapidly.Yet in the PON network, if laser diode driver circuit occur to lose efficacy or situation such as out of control, just occur a long-time luminous or not controlled luminous launch point in the PON network, this will influence the communication of whole network, can cause large-area PON network paralysis.
In order to solve the paralysis problem of above-mentioned PON network, existing method is to increase controlled function in the peripheral control circuit before laser diode driver circuit, and this function realizes the PON network control by sense enable signal and luminous signal combined sequence.Because this controlled function is to detect sequence luminous and not luminous composition, can't correctly judge the transmission of two adjacent very near data, the control that can make the mistake.And this controlled function is to judge by the light signal that detects emission, and light signal is converted to the signal of telecommunication handles, realizes more complicated, the cost height.
Therefore, there is following problem at least in prior art: prior art can't effectively solve the PON network paralysis problem that causes because of light signal is not controlled, and realizes complexity, and system cost is higher.
The utility model content
The utility model embodiment provides a kind of light emission system to launch the not controlled PON network paralysis problem that causes with simple and effective solution because of light signal, reduces system cost.
For achieving the above object, the utility model embodiment provides a kind of light emission system on the one hand, comprise drive circuit and the light emission module that is connected with described drive circuit, it is characterized in that, also comprise respectively the emission control module that is connected with light emission module with described drive circuit;
Described drive circuit is used to produce the signal of telecommunication;
Described light emission module is used for the converting electrical signal that described drive circuit produces is become light signal, and launches described light signal;
Described emission control module, be used to detect the signal of telecommunication that described drive circuit produces, the duration of the described signal of telecommunication carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, turn-off the described signal of telecommunication, to close the light signal emission of described light emission module.
On the other hand, the utility model embodiment also provides a kind of emission control module, comprising: comprise detecting unit and the control unit that is connected with described detecting unit;
Described detecting unit is used to detect the signal of telecommunication that described drive circuit produces;
Described control unit, be used for the duration of the detected signal of telecommunication of described detecting unit is carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, send the closing control signal to switch, turn-off the described signal of telecommunication, to close the light signal emission of described light emission module.
Compared with prior art, the utility model embodiment has the following advantages: the light emission system that provides of the utility model embodiment comprises drive circuit and the light emission module that is connected with described drive circuit, and the emission control module that is connected with light emission module with described drive circuit respectively.Described emission control module detects the signal of telecommunication that described drive circuit produces, and the duration of the described signal of telecommunication is carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, turn-offs the described signal of telecommunication, to close the light signal emission of described light emission module.Need not opto-electronic conversion and handle, thereby efficiently solve because of the not controlled PON network paralysis problem that causes of light signal emission.
Description of drawings
Fig. 1 is the structural representation of the light emission system of the utility model embodiment;
Fig. 2 is the electrical schematic diagram of the light emission system of the utility model embodiment.
Embodiment
Be described in detail below in conjunction with the embodiment of accompanying drawing the utility model embodiment:
The utility model is intended to solve the PON network because of the not controlled network paralysis problem that causes of light signal emission.The PON network paralysis mainly contains following reason and causes generally speaking:
(1) the main controller program exception of control light emission system.
(2) light emission system driving circuit abnormality.
Wherein, the unusual main cause of main controller is: program fleet in this case, generally shows as the uncontrolled long hair light of light emission system.The main cause of light emission system driving circuit abnormality is: hardware circuit suffers damage, and equally generally shows as the uncontrolled long hair light of light emission system.
In order to address the above problem, the utility model embodiment provides a kind of light emission system, comprises drive circuit and the light emission module that is connected with described drive circuit, and the emission control module that is connected with light emission module with described drive circuit respectively.Described drive circuit is used to produce the signal of telecommunication.Described light emission module is used for the converting electrical signal that described drive circuit produces is become light signal, and launches described light signal.Described emission control module, be used to detect the signal of telecommunication that described drive circuit produces, the duration of the described signal of telecommunication carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, turn-off the described signal of telecommunication, to close the light signal emission of described light emission module.Wherein:
Described emission control module comprises detecting unit and the control unit that is connected with described detecting unit.Described detecting unit is used to detect the signal of telecommunication that described drive circuit produces.Described control unit, be used for the duration of the detected signal of telecommunication of described detecting unit is carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, send the closing control signal to switch, turn-off the described signal of telecommunication, to close the light signal emission of described light emission module.
Described emission control module also comprises respectively the switch that is connected with control unit with described detecting unit.Described switch is used for controlling according to the control signal that described control unit sends the light signal emission of described light emission module.
Described emission control module also comprises the unusual indicating member and the reset unit that are connected with described control unit.Described unusual indicating member is used to export the abnormal indication signal that described control unit produces.Described reset unit is used to export the abnormality information that described control unit produces, to described control unit input repositioning information.
As shown in Figure 1, be the structural representation of the light emission system of the utility model embodiment.In the present embodiment: control unit be specially the microcontroller microcontroller (Micro Control Unit, MCU).Detecting unit is specially current detecting unit.Switch can be triode, field effect transistor, relay or analog switch etc.Reset unit is specially internal integrated circuit (Inter-Integrated Circuit, I2C) bus.
The light emission system of present embodiment comprises drive circuit 1 and the light emission module 2 that is connected with drive circuit 1, and the emission control module 3 that is connected with light emission module 2 with drive circuit 1 respectively.Wherein:
Wherein, form the loop between drive circuit 1 and the light emission module 2, one on the described loop is connected with emission control module 2.Concrete, drive circuit 1 is connected with detecting unit 32; Detecting unit 32 is connected with switch 33; Switch 33 is connected with light emission module 2 again; Another of the loop of drive circuit 1 and light emission module 2 then is that drive circuit 1 directly is connected with light emission module 2.In addition, detecting unit 32 also is connected with control unit 31, and control unit 31 also is connected with switch 33.
Based on above-mentioned light emission system, 32 pairs of drive circuits of current detecting unit 1 carry out current signal and detect, and have current signal to produce when current detecting unit 32 detects drive circuit 1, when promptly light emission module 2 has the light signal emission, the output high level is to MCU 31, otherwise output low level.MCU 31 is according to the signal controlling timing of current detecting unit 32 outputs, when the input signal of MCU31 is high level, MCU 31 begins the duration of the current signal of this generation is carried out timing, and whether the duration of judging this light signal exceeds threshold value, and (general threshold value can be set at 10～15mA), before timing does not reach threshold value, the input signal of MCU31 becomes low level again, be that light emission module 2 is when stopping to launch light signal, this timing record is removed in then MCU 31 zero clearings.When timing reaches threshold value, be when surpassing duration of the light signal of light emission module 2 these emissions described threshold value, MCU 31 sends the closing control signal to switch 33, the loop that switch 33 disconnects between drive circuit 1 and the light emission module 2, turn-off the light signal emission of light emission module 2, the abnormal indication signal that simultaneously unusual indicating member 35 output MCU 31 produce, the abnormality information that I2C bus output MCU 31 produces, light emission system enters abnormality, and enter the influence that MCU 21 after the abnormality no longer is subjected to current detecting unit 22, keep the abnormality of light emission system to receive reset signal by the I2C bus up to MCU 21.After this, MCU 21 makes light emission system enter normal condition by resetting.
The light emission system that provides of the utility model embodiment comprises drive circuit and the light emission module that is connected with described drive circuit, and the emission control module that is connected with light emission module with described drive circuit respectively.Described emission control module detects the signal of telecommunication that described drive circuit produces, and the duration of the described signal of telecommunication is carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, turn-offs the described signal of telecommunication, to close the light signal emission of described light emission module.
As shown in Figure 2, be the electrical schematic diagram of the light emission system of the utility model embodiment.In the present embodiment, drive circuit by integrated circuit (IC) chip for example: MAX3656 and peripheral circuit thereof are formed.The emission control module is made up of switch Q1, MCU, resistance R 1 and comparator etc.Wherein, resistance R 1 and comparator are formed the current detecting unit of emission control module.The MAX3656 of drive circuit drives light emission module LD by ground circuit BIAS+, OUT+ and OUT-output current.The electric current that drives light emission module LD is back to OUT+ by laser diode LD again by R1, switch Q1.When electric current minimum (such as less than 1mA), light emission module LD is not luminous; When electric current reached 10-15mA, it was luminous to drive light emission module LD.When passing through R1, electric current produces a pressure drop Vi, wherein, and Vi=I*R1 (I is an electric current).Electric current becomes the variation of the negative input end voltage of voltage comparator, and the positive terminal voltage of voltage comparator obtains a suitable value by R2 and R3 dividing potential drop.The negative terminal voltage of voltage comparator reduces above anode when electric current, and voltage comparator output high level is to the GPIO2 of MCU.When MCU detected voltage comparator and is high level, MCU picked up counting, and is output as low level up to comparator, and perhaps timing is overflowed.When timing is overflowed, promptly judge luminous unusually, then MCU is by the return flow path of control pin GPI01 output high level cut-off current, and light emission module LD is not luminous, simultaneously by the GPIO3 output low level, indicates abnormality.Also send abnormality information simultaneously, receive repositioning information by the I2C bus interface, open switch Q1, recover normal condition up to MCU by the I2C bus.
The light emission system that provides of the utility model embodiment comprises drive circuit and the light emission module that is connected with described drive circuit, and the emission control module that is connected with light emission module with described drive circuit respectively.Described emission control module detects the signal of telecommunication that described drive circuit produces, and the duration of the described signal of telecommunication is carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, turn-offs the described signal of telecommunication, to close the light signal emission of described light emission module.Need not opto-electronic conversion and handle, thereby efficiently solve because of the not controlled PON network paralysis problem that causes of light signal emission.
It will be appreciated by those skilled in the art that the unit in the module among the embodiment can be distributed in the module of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more modules that are different from present embodiment.A unit can be merged in the unit of the foregoing description, also can further split into a plurality of subelements.
More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection range of the present utility model.
Claims (9)
1, a kind of light emission system comprises drive circuit and the light emission module that is connected with described drive circuit, it is characterized in that, also comprises respectively the emission control module that is connected with light emission module with described drive circuit;
Described drive circuit is used to produce the signal of telecommunication;
Described light emission module is used for the converting electrical signal that described drive circuit produces is become light signal, and launches described light signal;
Described emission control module, be used to detect the signal of telecommunication that described drive circuit produces, the duration of the described signal of telecommunication carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, turn-off the described signal of telecommunication, to close the light signal emission of described light emission module.
2, light emission system according to claim 1 is characterized in that described emission control module comprises detecting unit and the control unit that is connected with described detecting unit;
Described detecting unit is used to detect the signal of telecommunication that described drive circuit produces;
Described control unit, be used for the duration of the detected signal of telecommunication of described detecting unit is carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, send the closing control signal to switch, turn-off the described signal of telecommunication, to close the light signal emission of described light emission module.
As light emission system as described in the claim 2, it is characterized in that 3, described emission control module also comprises respectively the switch that is connected with control unit with described detecting unit;
Described switch is used for controlling according to the control signal that described control unit sends the light signal emission of described light emission module.
4, light emission system according to claim 1 is characterized in that described emission control module also comprises the unusual indicating member that is connected with described control unit;
Described unusual indicating member is used to export the abnormal indication signal that described control unit produces.
5, light emission system according to claim 1 is characterized in that the described control module of penetrating also comprises the reset unit that is connected with described control unit;
Described reset unit is used to export the abnormality information that described control unit produces, to described control unit input repositioning information.
6, a kind of emission control module is characterized in that, comprises detecting unit and the control unit that is connected with described detecting unit;
Described detecting unit is used to detect the signal of telecommunication that described drive circuit produces;
Described control unit, be used for the duration of the detected signal of telecommunication of described detecting unit is carried out timing, when the duration of the described signal of telecommunication exceeds threshold value, send the closing control signal to switch, turn-off the described signal of telecommunication, to close the light signal emission of described light emission module.
7, as emission control module as described in the claim 6, it is characterized in that, also comprise respectively the switch that is connected with control unit with described detecting unit;
Described switch is used for controlling according to the control signal that described control unit sends the light signal emission of described light emission module.
8, as emission control module as described in the claim 6, it is characterized in that, also comprise the unusual indicating member that is connected with described control unit;
Described unusual indicating member is used to export the abnormal indication signal that described control unit produces.
9, as emission control module as described in the claim 6, it is characterized in that, also comprise the reset unit that is connected with described control unit;
Described reset unit is used to export the abnormality information that described control unit produces, to described control unit input repositioning information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201148400U CN201215955Y (en) | 2008-05-21 | 2008-05-21 | Light transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201148400U CN201215955Y (en) | 2008-05-21 | 2008-05-21 | Light transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN201215955Y true CN201215955Y (en) | 2009-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201148400U Expired - Lifetime CN201215955Y (en) | 2008-05-21 | 2008-05-21 | Light transmission system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923249A (en) * | 2018-08-21 | 2018-11-30 | 维沃移动通信有限公司 | A kind of protection mould group and electronic equipment |
| CN109286126A (en) * | 2018-11-29 | 2019-01-29 | Oppo广东移动通信有限公司 | Output control method and electronic equipment, the computer readable storage medium of laser |
| CN110098864A (en) * | 2019-04-11 | 2019-08-06 | 青岛海信宽带多媒体技术有限公司 | Control method, optical module and the network equipment of optical module |
| CN112731437A (en) * | 2020-12-01 | 2021-04-30 | 南京理工大学北方研究院 | Intersection traffic flow detection monitoring system based on laser detection |
-
2008
- 2008-05-21 CN CNU2008201148400U patent/CN201215955Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923249A (en) * | 2018-08-21 | 2018-11-30 | 维沃移动通信有限公司 | A kind of protection mould group and electronic equipment |
| CN108923249B (en) * | 2018-08-21 | 2020-03-03 | 维沃移动通信有限公司 | Protection module and electronic equipment |
| CN109286126A (en) * | 2018-11-29 | 2019-01-29 | Oppo广东移动通信有限公司 | Output control method and electronic equipment, the computer readable storage medium of laser |
| CN110098864A (en) * | 2019-04-11 | 2019-08-06 | 青岛海信宽带多媒体技术有限公司 | Control method, optical module and the network equipment of optical module |
| CN112731437A (en) * | 2020-12-01 | 2021-04-30 | 南京理工大学北方研究院 | Intersection traffic flow detection monitoring system based on laser detection |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090401 |