CN205105222U - Photoelectric conversion module and electric power communication system - Google Patents
Photoelectric conversion module and electric power communication system Download PDFInfo
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- CN205105222U CN205105222U CN201520885930.XU CN201520885930U CN205105222U CN 205105222 U CN205105222 U CN 205105222U CN 201520885930 U CN201520885930 U CN 201520885930U CN 205105222 U CN205105222 U CN 205105222U
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- photoelectric conversion
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Abstract
The utility model discloses a photoelectric conversion module and electric power communication system, fan -out buffer unit and two sets of lightning translation unit, the first difference signal of telecommunication that the fan -out buffer unit will be imported carries out the shut and forms two way second difference signals of telecommunication, all the way the second difference signal of telecommunication is through a set of lightning translation unit carries out the lightning conversion, and it will to realize first difference electric signal transition becomes two way light signals. Will the utility model discloses in being applied to electric power system with the photoelectric conversion module, having solved difficult miniaturized, the problem that the consumption is big of the electric power communication system equipment that one way photoelectric conversion brought because of the photoelectric conversion module that exists in the technique, having reached and reduce the assembly volume, improved data transmission density, the effect of material saving cost and system maintenance cost simultaneously, has reduced total power consumption and operating temperature, the operational reliability of improvement system.
Description
Technical field
The utility model relates to the application of power communication transmission system and field of industrial automation control, particularly relates to a kind of photoelectric conversion module and power communication system.
Background technology
Fiber-optic Communication In Electric Power System net has become that China is larger, the comparatively perfect private wire network of development, and optical fiber communication is ensureing power system security, stable operation, meets the people and to produce and life aspect serves positive role.
Power communication carries the conversational traffic such as data, voice, broadband, IP, is the important and part of key of electric power system.The safety guarantee of power communication and efficient, the safe operation of the lifting of operating efficiency to whole electric power system play an important role.Because optical fiber communication has, electrical insulation capability is high, antijamming capability is strong, capacity is large, transmission quality advantages of higher, so apply efficient, safety and stability that optical fiber communication just can realize network system in electric power system.
Along with the development of economy, the demand of all trades and professions to electric power is increasing, and increasing extent is wide.Require that electric power system constantly uses of the new technology, improve service quality.Therefore, the maintenance management of electrical network progressively realizes intellectuality, such as: Automatic meter reading system, automatically electric power distribution system etc.This just needs a large amount of terminal data collections to report, and one point data can be reported to the data processing unit of different management and control function simultaneously fast simultaneously.As shown in Figure 1, the electric signal transmission that signals collecting transducer in power communication system application gathers is to controlling of sampling plate, controlling of sampling plate delivers to two photoelectric conversion modules by electro-optic conversion signal simultaneously, the two ways of optical signals of output by optical fiber respectively synchronous transmission to the control unit A of far-end and control unit B.
Photoelectric conversion module in prior art in Fig. 1 adopts photoelectric conversion module as shown in Figure 2, and signal of telecommunication input optical module transmitting terminal realizes electro-optic conversion Output of laser signal by the driving of laser driver, completes long-distance transmissions by optical fiber; The laser signal transmission that far-end receives, to the receiving terminal of photoelectric conversion module, exports the signal of telecommunication by the opto-electronic conversion of receiving circuit and completes light signal reception transmission; Laser driver circuit provides required drive current for laser, drive current comprises modulated current and bias current, modulated current is exactly the high-speed digital signal of transmission, bias current is mainly used in the threshold value of opening laser, common bias current supply circuit is automatic power control circuitry, automatic power control circuitry generally adopts operational amplifier to carry out the base voltage of control amplifier, needs the power of consumption more.
The one point data multiplexing utilizing existing optical module to realize in power communication system has the following disadvantages:
Existing photoelectric conversion module only has that riches all the way to be penetrated, a road receives, and a common photoelectric conversion module can only transmit by transmission of one line simultaneously, is unfavorable for the miniaturization of control appliance;
The operational environment of electric control appliance is relatively more severe, and casing water proof and dust proof seal request is high, and the photoelectric conversion module hot properties of corresponding type selecting requires strict, and high temperature resistant, the low-power consumption index of common photoelectric conversion module are difficult to meet application request completely.
Utility model content
In view of this, in order to overcome the power communication system equipment brought because of the single channel opto-electronic conversion of photoelectric conversion module that exists in prior art not easily miniaturized, problem that power consumption is large, the utility model provides a kind of photoelectric conversion module.
In order to solve the problem, photoelectric conversion module of the present utility model, comprise: fan-out buffer cell and two groups of electrooptic switching elements, first differential electric signal of input is carried out shunt and is formed two-way second differential electric signal by described fan-out buffer cell, second differential electric signal described in one tunnel carries out electro-optic conversion through electrooptic switching element described in a group, realizes converting described first differential electric signal to two ways of optical signals.
Further, described fan-out buffer cell comprises impedance distributor circuit and two impedance matching circuits, described impedance distributor circuit obtains after described first differential electric signal is carried out impedance distribution treating differential electric signal along separate routes, to described, described two impedance matching circuits treat that differential electric signal carries out signal buffered formation described second differential electric signal identical with the differential electric signal differential impedance of described input along separate routes, realizes described first differential electric signal being carried out shunt and forms two-way second differential electric signal respectively.
Wherein, described electrooptic switching element comprises: Laser Driven module and laser beam generating circuit, and described Laser Driven module produces drive singal and drives described laser beam generating circuit to produce light signal using described second differential electric signal as input voltage.
Further, described Laser Driven module comprises: difference turns single-end circuit, temperature-compensation circuit, temperature control bleeder circuit and laser bias circuit, described second differential electric signal turns single-end circuit by described difference and exports single-ended electrical signal and provide modulation signal for described laser beam generating circuit, described temperature-compensation circuit is that described difference turns single-end circuit and carries out temperature-compensating, described temperature control bleeder circuit provides base voltage for described laser bias circuit, and described laser bias circuit provides the bias current of quiescent point for described laser beam generating circuit.
Wherein, described temperature control bleeder circuit comprises: the parallel branch of negative tempperature coefficient thermistor RT and resistance R1 and resistance R2, one end of parallel branch connects power supply VCC, the other end is by resistance R2 ground connection, one end that parallel branch is connected with resistance R2 is provided with voltage output end, and the dividing potential drop on resistance R2 provides described base voltage for described laser bias circuit.
The invention also discloses a kind of power communication system, comprise: signal sampling unit, photoelectric conversion module and at least two control units, the convert information collected is the first differential electric signal by described signal sampling unit, and described second differential electric signal is sent to described photoelectric conversion module, described first differential electric signal is carried out shunt and is formed two-way second differential electric signal by described photoelectric conversion module, and electro-optic conversion is carried out to described two-way second differential electric signal obtain two ways of optical signals, described two ways of optical signals is transferred to different control units respectively, described control unit is according to the described light signal formation control instruction received.
Further, also comprise controlling of sampling unit, described controlling of sampling unit is connected with described signal sampling unit, photoelectric conversion module and control unit respectively, control described photoelectric conversion module and receive the described differential electric signal that described signal sampling unit sends over, and control described photoelectric conversion module and send corresponding light signal to described control unit.
Compared with prior art, advantage of the present utility model is: power communication system of the present utility model utilizes photoelectric conversion module the one road signal of telecommunication to be carried out shunt process, realize two-way optical signal transmission, assembling volume-diminished half, transfer of data density doubles, and greatly saves material cost and system maintenance cost; Designed by the power saving of drive circuit for laser, the common photoelectric conversion module of equivalent signals transfer function electricity modular converter power dissipation ratio has been made to reduce half, the total power consumption greatly reducing electric control system reduces the working temperature of system simultaneously, the functional reliability of raising system, also reaches energy-saving and cost-reducing, environmental protection object.
Accompanying drawing explanation
Fig. 1 is the structural representation of power communication system in prior art;
Fig. 2 is the circuit connection diagram of photoelectric conversion module in prior art;
Fig. 3 is the structural representation of power communication system of the present utility model;
Fig. 4 is the circuit connection diagram of photoelectric conversion module in the utility model;
Fig. 5 is the circuit connection diagram of fan out buffer;
Fig. 6 is the connection diagram of laser driver circuit;
Fig. 7 is the connection diagram of temperature control bleeder circuit.
Embodiment
Below in conjunction with embodiment, the utility model is further described.
Power communication system in Fig. 3 comprises: controlling of sampling unit and multiple signal sampling unit, photoelectric conversion module and control unit, multiple signal sampling unit is arranged on different sampled points, the convert information collected is differential electric signal by signal sampling unit, and differential electric signal is sent to photoelectric conversion module, differential electric signal carries out along separate routes and carries out electro-optic conversion respectively to the differential electric signal after shunt obtaining two ways of optical signals by photoelectric conversion module, two ways of optical signals is transferred to simultaneously different control unit A and control unit B, control unit A, B is according to the light signal formation control instruction received separately.Above-mentioned photoelectric conversion module can only accept at synchronization the signal of telecommunication that a signal sampling unit sends over, controlling of sampling unit is connected with signal sampling unit, photoelectric conversion module and control unit respectively, the described differential electric signal that controlling of sampling unit cooperation control photoelectric conversion module Received signal strength sampling unit sends over, and control described photoelectric conversion module and send corresponding light signal to described control unit.Above-mentioned signal sampling unit can adopt transducer.
Photoelectric conversion module in above-mentioned power communication system adopts as shown in Figure 4, and this photoelectric conversion module comprises: fan-out buffer cell and two groups of electrooptic switching elements, and differential voltage is+V by input by fan-out buffer cell
iNwith-V
iNthe first differential electric signal is distributed through impedance, coupling exports identical the second differential electric signal of two-way, that is: differential voltage is+V
q0,-V
q0differential electric signal and differential voltage be+V
q1,-V
q1differential electric signal, road second differential electric signal carries out electro-optic conversion through electrooptic switching element described in a group; Often organize electrooptic switching element to include: Laser Driven module and laser beam generating circuit, these circuit modules be arranged on PCB is carried out integrated, Laser Driven module produce using the second differential electric signal as input voltage drive singal drive described laser beam generating circuit produce light signal.Finally make to become two ways of optical signals by a road differential electric signal of this photoelectric conversion module.
Fan-out buffer circuit can adopt the 1 point of 2 signal fan-out buffer integrated circuit selecting low-voltage, small package, high-band logical.Fan-out buffer circuit in the present embodiment, as shown in Figure 5, comprise: impedance distributor circuit and two impedance matching circuits, the differential electric signal of input is carried out impedance distribution by impedance distributor circuit, the differential impedance of the first differential electric signal is 100 ohm, this differential impedance is carried out equity to distribute, make the impedance of signal tapping point continuous, ensure the integrality of signal; Through impedance distribute differential electric signal again respectively through impedance matching circuit, this impedance matching circuit is equivalent to output buffer, the differential signal being 100 ohm by a road differential impedance is divided into two-pass DINSAR impedance to be the differential signal of 100 ohm, ensures the integrality of signal simultaneously.
First, second laser beam generating circuit above-mentioned selects common lasers luminescence component, according to transmission range uncooled IRFPA type (FP type) laser diode or distributed feedback (DFB type) laser diode; PCB FR4 material presses four-sheet structure wiring.
Photoelectric conversion module in Fig. 4 makes a photoelectric conversion module carry out shunt process to a road differential electric signal, realizes two-way optical signal transmission, and assembling volume-diminished half, transfer of data density doubles, and greatly saves material cost and system maintenance cost.In addition, common integrated circuit scheme due to the power dissipation ratio of integrated circuit own larger, integrated circuit self power consumption is generally at about 80 ~ 90mA, so common photoelectric conversion module operating current general control is at about 160mA, if transmitting two paths utilizing emitted light, need two common photoelectric conversion modules, total power consumption reaches: about 320mA; This photoelectric conversion module wants transmitting two paths utilizing emitted light then to need a common photoelectric conversion module, and total power consumption only has: about 150mA.So overall power probably has the reduction of more than 50%, for the application of Electric control case assembling ten a few to tens of photoelectric conversion modules, energy-conservation, cooling-down effect is obvious.
In order to reduce the power consumption of photoelectric conversion module further, in the present embodiment, improvement is made to the laser driver circuit in Fig. 4, in Fig. 6, laser driver circuit comprises: difference turns single-end circuit, temperature-compensation circuit, temperature control bleeder circuit and laser bias circuit, differential electric signal+V
q0,-V
q0turn single-end circuit by difference and export single-ended electrical signal under the effect of temperature-compensation circuit for laser provides the modulation signal I needed for can changing with laser performance
mod, laser bias circuit under the voltage division processing of temperature control bleeder circuit for laser provides the bias current I of quiescent point
bias.
The difference of above-mentioned drive circuit turns single-end circuit and selects the LVDS of low-voltage to turn LVTTL integrated circuit, as FIN1002 integrated circuit; Temperature-compensation circuit and laser bias circuit all can adopt available circuit, the present embodiment has done further improvement to temperature control bleeder circuit, as shown in Figure 7, temperature control bleeder circuit after improvement comprises: the parallel branch of negative tempperature coefficient thermistor (NTC thermistor) RT and resistance R1 and resistance R2, one end of parallel branch connects power supply VCC, the other end is by resistance R2 ground connection, one end that parallel branch is connected with resistance R2 is provided with voltage output end, and the dividing potential drop on resistance R2 provides base voltage Vb as the amplifier triode in laser bias circuit.The total temperature work of the negative temperature coefficient feature of thermistor to laser is utilized to carry out tracing compensation, when laser temperature changes, the resistance of thermistor is also corresponding to change, on temperature control bleeder circuit, the dividing potential drop of resistance R2 occurs also to increase along with the rising of temperature, for the triode amplifier in laser bias circuit provides base voltage, make to flow through the electric current flowing through emitter from collector electrode and be the bias current Ibias also corresponding increase that laser provides.The laser drive circuit of the present embodiment realizes and the special integrated drive electronics equivalent effect of existing laser, but power consumption achieves very large lifting.
More than describe preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned execution mode; within the scope of technical conceive of the present utility model; can carry out multiple equivalents to the technical solution of the utility model, these equivalents all belong to protection range of the present utility model.
Claims (9)
1. a photoelectric conversion module, it is characterized in that, comprise: fan-out buffer cell and two groups of electrooptic switching elements, first differential electric signal of input is carried out shunt and is formed two-way second differential electric signal by described fan-out buffer cell, second differential electric signal described in one tunnel carries out electro-optic conversion through electrooptic switching element described in a group, realizes converting described first differential electric signal to two ways of optical signals.
2. photoelectric conversion module according to claim 1, it is characterized in that, described fan-out buffer cell comprises impedance distributor circuit and two impedance matching circuits, described impedance distributor circuit obtains after described first differential electric signal is carried out impedance distribution treating differential electric signal along separate routes, to described, described two impedance matching circuits treat that differential electric signal carries out signal buffered formation described second differential electric signal identical with the differential electric signal differential impedance of described input along separate routes, realizes described first differential electric signal being carried out shunt and forms two-way second differential electric signal respectively.
3. photoelectric conversion module according to claim 1, it is characterized in that, described electrooptic switching element comprises: Laser Driven module and laser beam generating circuit, and described Laser Driven module produces drive singal and drives described laser beam generating circuit to produce light signal using described second differential electric signal as input voltage.
4. photoelectric conversion module according to claim 3, it is characterized in that, described Laser Driven module comprises: difference turns single-end circuit, temperature-compensation circuit, temperature control bleeder circuit and laser bias circuit, described second differential electric signal turns single-end circuit by described difference and exports single-ended electrical signal and provide modulation signal for described laser beam generating circuit, described temperature-compensation circuit is that described difference turns single-end circuit and carries out temperature-compensating, described temperature control bleeder circuit provides base voltage for described laser bias circuit, described laser bias circuit provides the bias current of quiescent point for described laser beam generating circuit.
5. photoelectric conversion module according to claim 4, it is characterized in that, described temperature control bleeder circuit comprises: the parallel branch of negative tempperature coefficient thermistor RT and resistance R1 and resistance R2, one end of parallel branch connects power supply VCC, the other end is by resistance R2 ground connection, one end that parallel branch is connected with resistance R2 is provided with voltage output end, and the dividing potential drop on resistance R2 provides described base voltage for described laser bias circuit.
6. photoelectric conversion module according to claim 3, is characterized in that, it is uncooled IRFPA type laser diode or distribute feedback laser diode that the luminescence component of described laser beam generating circuit adopts.
7. a power communication system, it is characterized in that, also comprise: signal sampling unit, photoelectric conversion module and at least two control units, the convert information collected is the first differential electric signal by described signal sampling unit, and described second differential electric signal is sent to described photoelectric conversion module, described first differential electric signal is carried out shunt and is formed two-way second differential electric signal by described photoelectric conversion module, and electro-optic conversion is carried out to described two-way second differential electric signal obtain two ways of optical signals, described two ways of optical signals is transferred to different control units respectively, described control unit is according to the described light signal formation control instruction received.
8. power communication system according to claim 7, it is characterized in that, also comprise controlling of sampling unit, described controlling of sampling unit is connected with described signal sampling unit, photoelectric conversion module and control unit respectively, control described photoelectric conversion module and receive the described differential electric signal that described signal sampling unit sends over, and control described photoelectric conversion module and send corresponding light signal to described control unit.
9. the power communication system according to claim 7 or 8, is characterized in that, described signal sampling unit is transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520885930.XU CN205105222U (en) | 2015-11-09 | 2015-11-09 | Photoelectric conversion module and electric power communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520885930.XU CN205105222U (en) | 2015-11-09 | 2015-11-09 | Photoelectric conversion module and electric power communication system |
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| CN205105222U true CN205105222U (en) | 2016-03-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106548615A (en) * | 2016-12-08 | 2017-03-29 | 广东汇海华天科技有限公司 | A kind of collection for electricity meter-reading copies communicator |
| CN114696911A (en) * | 2022-03-30 | 2022-07-01 | 航天科工微电子系统研究院有限公司 | Optical fiber communication processing module based on heterogeneous packaging |
-
2015
- 2015-11-09 CN CN201520885930.XU patent/CN205105222U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106548615A (en) * | 2016-12-08 | 2017-03-29 | 广东汇海华天科技有限公司 | A kind of collection for electricity meter-reading copies communicator |
| CN106548615B (en) * | 2016-12-08 | 2020-09-15 | 广东汇海华天科技有限公司 | Centralized meter reading communicator for electric power meter reading |
| CN114696911A (en) * | 2022-03-30 | 2022-07-01 | 航天科工微电子系统研究院有限公司 | Optical fiber communication processing module based on heterogeneous packaging |
| CN114696911B (en) * | 2022-03-30 | 2023-07-18 | 航天科工微电子系统研究院有限公司 | Optical fiber communication processing module based on heterogeneous encapsulation |
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