CN208753725U - The thermostatic control system of EDFA pump laser - Google Patents
The thermostatic control system of EDFA pump laser Download PDFInfo
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- CN208753725U CN208753725U CN201820932641.4U CN201820932641U CN208753725U CN 208753725 U CN208753725 U CN 208753725U CN 201820932641 U CN201820932641 U CN 201820932641U CN 208753725 U CN208753725 U CN 208753725U
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Abstract
The utility model discloses a kind of thermostatic control systems of EDFA pump laser, it includes that EDFA pump laser, the first detection amplifying circuit, the second detection amplifying circuit, TEC current control circuit and microprocessor, the microprocessor include sequentially connected first computing module, the first PID controller, the second computing module and the second PID controller.EDFA pump laser, the first detection amplifying circuit, the first computing module, the first PID controller, the second computing module, the second PID controller and TEC current control circuit constitute the PID control of temperature outer ring, and TEC current control circuit, the second detection amplifying circuit, the second computing module and the second PID controller constitute current inner loop PID control.The utility model is adjusted by introducing electric current loop in temperature outer ring, can reduce the steady-state error of EDFA pump laser temperature, and accelerate temperature outer ring by the transformation of unstable state to stable state.
Description
Technical field
The utility model relates to the technical field of laser, in particular to a kind of thermostatic control system of EDFA pump laser
System.
Background technique
It is right such as the pump laser of erbium-doped fiber amplifier, i.e. EDFA pump laser in the technical field of laser
The stability requirement of temperature is higher.Two schemes are mainly used to the control of EDFA pump laser temperature at present:
The first scheme: it is controlled using single-chip integration formula TEC temperature controller (such as ADN8831 of ADI company production)
System, and single-chip integration formula TEC temperature controller price is higher.
Second scheme: it is pumped using EDFA is controlled based on single closed loop thermal control system that singlechip microprocessor controls
Pu laser, and use and EDFA pump laser is controlled based on single closed loop thermal control system that singlechip microprocessor controls
The steady-state error that scheme often has temperature is larger, stability not high defect when by external interference.
Utility model content
In view of the problems of the existing technology, the main purpose of the utility model is to provide a kind of EDFA pump laser
Thermostatic control system, it is intended to which the steady-state error for solving temperature is larger, stability not high defect when by external interference.
To achieve the above object, the utility model proposes EDFA pump laser thermostatic control system comprising:
EDFA pump laser is detected for detecting EDFA pump laser actual temperature signal and exporting the first of the first temperature signal
Amplifying circuit, according to the first meter of the first temperature signal and the set temperature signal output temperature difference signal of EDFA pump laser
Module is calculated, the first PID controller of the theory T EC current signal of pump laser is exported according to difference signals, for detecting
Second detection amplifying circuit of TEC current signal and the first current signal of output that EDFA pump laser actually enters, according to
Second computing module of theory T EC current signal and the first current signal output current difference signal, exports according to current difference signal
Second PID controller of the second current signal exports the TEC current control circuit of TEC current signal according to the second current signal.
First computing module, the first PID controller, the second computing module and the second PID controller are arranged in microprocessor.
The temperature signal output end of EDFA pump laser is connect with the input terminal of the first detection amplifying circuit, the first detection
The output end of amplifying circuit is connect with the input terminal of the first computing module, the output end of the first computing module and the first PID control
The input terminal of device connects, and the output end of the first PID controller is connect with the first input end of the second computing module, and second calculates mould
The output end of block is connect with the input terminal of the second PID controller, the output end and TEC current control circuit of the second PID controller
Input terminal connection, the first output end of TEC current control circuit connect with the input terminal of the second detection amplifying circuit, and TEC is electric
The second output terminal of flow control circuit is connect with the input terminal of EDFA pump laser, second detection amplifying circuit output end with
Second input terminal of the second computing module connects.
Preferably, the first detection amplifying circuit includes the first operational amplifier, the non-inverting input terminal of the first operational amplifier
It is connect with the temperature signal output end of EDFA pump laser, the first end of first resistor, the first end of the second capacitor, the first electricity
Second termination supply voltage of resistance, and connect with the first end of first capacitor, the second end ground connection of first capacitor, the second capacitor
Second end ground connection.
The inverting input terminal of the output end of first operational amplifier and the first operational amplifier, the first end of second resistance connect
It connecing, the second end of second resistance is connect with the input terminal of the first end of third capacitor, the first computing module, and the second of third capacitor
End ground connection.
Preferably, the second detection amplifying circuit includes second operational amplifier.
The non-inverting input terminal of second operational amplifier is connect with the first end of the 5th resistance, the first end of the 4th capacitor, the
The second end of four capacitors is grounded.The second end of 5th resistance is connect with the first output end of TEC current control circuit, and passes through the
The parallel circuit that three resistance and the 4th resistance are constituted is grounded.
The inverting input terminal of second operational amplifier is connect with the first end of the 7th resistance, the first end of the 8th resistance, the
The second end of seven resistance is grounded.
The output end of second operational amplifier is connect with the first end of the 6th resistance, the second end of the 8th resistance connects.The
The second end of six resistance is connect with the first end of the second input terminal of the second computing module, the 5th capacitor, and the second of the 5th capacitor
End ground connection.
Preferably, the output end of the second PID controller includes the first output end and second output terminal, TEC current control electricity
The input terminal on road includes first input end and the second input terminal, and the second output terminal of TEC current control circuit includes TEC+ output
End and TEC- output end.
TEC current control circuit includes the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, third metal-oxide-semiconductor and the 4th metal-oxide-semiconductor.First MOS
The forward end of the grid of pipe and the second diode, the first end of eleventh resistor, the collector of the second triode, the 4th metal-oxide-semiconductor
Grid connection, the source electrode of the first metal-oxide-semiconductor, the backward end of the second diode, eleventh resistor the second termination supply voltage, the
The emitter of two triodes is grounded, and the base stage of the second triode and the first end of twelfth resistor connect.The of twelfth resistor
Second input terminal of two ends as TEC current control circuit, and connect with the second output terminal of the second PID controller.First MOS
The drain electrode of pipe is connect with the first end of the source electrode of the 4th metal-oxide-semiconductor, the second inductance.The second end of second inductance is as TEC electric current control
The TEC- output end of circuit processed, and connect with the refrigerator input terminal of pump laser, and pass through the 7th capacity earth.
The grid and the forward end of first diode of second metal-oxide-semiconductor, the first end of the tenth resistance, third metal-oxide-semiconductor grid,
The collector of first triode connects, the emitter ground connection of the first triode, and the of the base stage of the first triode and the 9th resistance
One end connection.First input end of the second end of 9th resistance as TEC current control circuit, and with the second PID controller
The connection of first output end.The source electrode of second metal-oxide-semiconductor is connect with the drain electrode of the first end of the first inductance, third metal-oxide-semiconductor, the first electricity
TEC+ output end of the second end of sense as TEC current control circuit, and connect with the heat-producing machine input terminal of pump laser, and
Pass through the 6th capacity earth.The drain electrode of second metal-oxide-semiconductor and the drain electrode of the input terminal, the 4th metal-oxide-semiconductor of the second detection amplifying circuit connect
It connects.
The source electrode of third metal-oxide-semiconductor, the backward end of first diode, the tenth resistance second termination supply voltage.
Compared with prior art, the utility model has the beneficial effects that: solving existing EDFA pump laser constant temperature
The steady-state error of control system temperature is larger, stability not high defect when by external interference.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the system schematic of the utility model；
Fig. 2 is the schematic diagram of the first detection amplifying circuit；
Fig. 3 is the schematic diagram of the second detection amplifying circuit；
Fig. 4 is microprocessor interface schematic diagram；
Fig. 5 is the schematic diagram of TEC current control circuit；
The utility model aim is realized, the embodiments will be further described with reference to the accompanying drawings for functional characteristics and advantage.
Specific embodiment
The utility model proposes a kind of thermostatic control systems of EDFA pump laser.
Referring to Fig.1-5, Fig. 1 is the system schematic of the utility model, and Fig. 2 is the schematic diagram of the first detection amplifying circuit,
Fig. 3 is the schematic diagram of the second detection amplifying circuit, and Fig. 4 is microprocessor interface schematic diagram, and Fig. 5 is TEC current control circuit
Schematic diagram.
As shown in Figure 1, in the utility model embodiment, the thermostatic control system of the EDFA pump laser includes:
EDFA pump laser 100, first detect amplifying circuit 200, second detect amplifying circuit 300, TEC current control circuit 400,
Microprocessor 500.The microprocessor 500 includes the first computing module 510, the first PID controller 520, the second computing module 530
And second PID controller 540.
The input terminal of first detection amplifying circuit 200 is connect with the temperature signal output end of EDFA pump laser 100, is used
In detection 100 actual temperature signal of EDFA pump laser and export the first temperature signal T1.Specifically, in the present embodiment,
As shown in Fig. 2, the first detection amplifying circuit 200 includes: the first operational amplifier A1, the homophase input of the first operational amplifier A1
End connects with the temperature signal output end of EDFA pump laser 100, the first end of first resistor R1, the first end of the second capacitor C2
It connecing, the second termination power source voltage Vcc of first resistor R1 and is connect with the first end of first capacitor C1, and the of first capacitor C1
Two ends ground connection, the second end ground connection of the second capacitor C2.
The of the inverting input terminal of the output end of first operational amplifier A1 and the first operational amplifier A1, second resistance R2
One end connection, the output end of the corresponding first detection amplifying circuit 200 of the second end of second resistance R2, and the with third capacitor C3
The input terminal connection of one end, the first computing module 510, the second end ground connection of third capacitor C3.
The input terminal of second detection amplifying circuit 300 is connect with the first output end of TEC current control circuit 400, is used for
Detection TEC current control circuit 400 exports the practical TEC current signal to work to EDFA pump laser 100, and exports first
Current signal I1.Specifically, in the present embodiment, as shown in figure 3, the second detection amplifying circuit 300 includes that the second operation is put
Big device A2.
The non-inverting input terminal of second operational amplifier A2 and the first end of the 5th resistance R5, the first end of the 4th capacitor C4 connect
It connects, the second end ground connection of the 4th capacitor C4.The second end of 5th resistance R5 and the first output end of TEC current control circuit 400
Connection, and be grounded by the parallel circuit that 3rd resistor R3 and the 4th resistance R4 is constituted.
The inverting input terminal of second operational amplifier A2 and the first end of the 7th resistance R7, the first end of the 8th resistance R8 connect
It connects, the second end ground connection of the 7th resistance R7.
The output end of second operational amplifier A2 is connect with the first end of the 6th resistance R6, the second end of the 8th resistance R8 connects
It connects.The output end of the corresponding second detection amplifying circuit 300 of the second end of 6th resistance R6, and the with the second computing module 530
The first end connection of two input terminals, the 5th capacitor C5, the second end ground connection of the 5th capacitor C5.
Specifically, in the present embodiment, as shown in figure 4, microprocessor 500 includes T1 pin, I1 pin, PWM (1) pin
And PWM (2) pin, wherein T1 pin is corresponding with the input terminal of the first computing module 510, I1 pin and the second computing module
530 the second input terminal is corresponding.The output end of second PID controller includes the first output end and second output terminal, and PWM (1) draws
Foot is corresponding with the first output end of the second PID controller 540, the second output terminal of PWM (2) pin and the second PID controller 540
It is corresponding.
The input terminal of TEC current control circuit includes first input end and the second input terminal, and the of TEC current control circuit
Two output ends include TEC+ output end and TEC- output end.In the present embodiment, as shown in figure 5, the TEC current control circuit
400 include: including the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2, third metal-oxide-semiconductor Q3 and the 4th metal-oxide-semiconductor Q4.
The forward end of the grid of first metal-oxide-semiconductor Q1 and the second diode D2, the first end of eleventh resistor R11, the two or three
The collector of pole pipe T2, the 4th metal-oxide-semiconductor Q4 grid connection, the source electrode of the first metal-oxide-semiconductor Q1, the second diode D2 backward end,
The second termination power source voltage Vcc of eleventh resistor R11, the emitter ground connection of the second triode T2, the base of the second triode T2
Pole is connect with the first end of twelfth resistor R12.The second end of twelfth resistor R12 as TEC current control circuit 400
Two input terminals, and connect with the PWM of microprocessor 500 (2) pin.The drain electrode of first metal-oxide-semiconductor Q1 and the source of the 4th metal-oxide-semiconductor Q4
The first end connection of pole, the second inductance L2.The second end of second inductance L2 is exported as the TEC- of TEC current control circuit 400
End, and connect with the refrigerator input terminal of pump laser 100, and be grounded by the 7th capacitor C7.
The grid and the forward end of first diode D1, the first end of the tenth resistance R10, third metal-oxide-semiconductor of second metal-oxide-semiconductor Q2
The collector connection of the grid of Q3, the first triode T1, the emitter ground connection of the first triode T1, the base stage of the first triode T1
It is connect with the first end of the 9th resistance R9.First input of the second end of 9th resistance R9 as TEC current control circuit 400
End, and connect with the PWM of microprocessor 500 (1) pin.First end, the third of the source electrode of second metal-oxide-semiconductor Q2 and the first inductance L1
The drain electrode of metal-oxide-semiconductor Q3 connects.The second end of first inductance L1 is corresponding as the TEC+ output end of TEC current control circuit 400,
And it is connect with the heat-producing machine input terminal of pump laser 100, and be grounded by the 6th capacitor C6.The drain electrode of second metal-oxide-semiconductor Q2 with
The drain electrode connection of the input terminal, the 4th metal-oxide-semiconductor of second detection amplifying circuit 300.
The source electrode of third metal-oxide-semiconductor Q3, the backward end of first diode D1, the tenth resistance R10 second termination supply voltage
Vcc。
When work, microprocessor 500 exports PWM (1) current signal from PWM (1) pin, and PWM (1) current signal is input to
In TEC current control circuit 400, the heat-producing machine work of control EDFA pump laser；Alternatively, microprocessor 500 is from PWM (2)
Pin exports PWM (2) current signal, and PWM (2) current signal is input in TEC current control circuit 400, control EDFA pumping
The refrigerator of laser 100 works.
Working principle of the utility model is: the first detection amplifying circuit 200 detects and amplifies EDFA pump laser 100
Actual temperature signal, and the first temperature signal T1 is exported to the first computing module according to actual temperature signal.First computing module
510 calculate difference signals according to the temperature signal of the first temperature signal T1 and EDFA pump laser 100 setting, and should
Difference signals are exported to the first PID controller 520.First PID controller 520 exports theory T EC electricity according to difference signals
Signal is flowed to the second computing module 530.Second detection amplifying circuit 300 detect and amplify TEC Current Controller circuit 400 output to
The practical TEC current signal that EDFA pump laser 100 works, and the first current signal is exported according to practical TEC current signal
I1 gives the second computing module 530.Second computing module 530 calculates reason according to theory T EC current signal and the first current signal I1
By the difference of TEC current value and the first current value and current difference signal is exported to the second PID controller 540.Second PID controller
540 export PWM (1) current signal or PWM (2) current signal to TEC current control circuit 400, control according to current difference signal
The heating or refrigeration of EDFA pump laser 100, to realize the thermostatic control of EDFA pump laser 100.
The utility model experiments verify that show to stabilize to 25 DEG C when the operating temperature of default EDFA pump laser 100,
And when external heat source is not added, the operating temperature that can control EDFA pump laser 100 is stablized at 25 DEG C ± 0.2 DEG C.When with temperature
When the heat gun that degree is set as 100 DEG C is heated to EDFA pump laser 100, the temperature deviation of EDFA pump laser 100 exists
Within ± 0.5 DEG C.
The utility model is by the temperature outer ring using controlled device actual temperature as amount of negative feedback and with TEC actual current
The double closed-loop control system that current inner loop as amount of negative feedback forms controls EDFA pump laser 100, can reduce pump
The steady-state error of Pu laser temperature, and accelerate temperature outer ring by the transformation of unstable state to stable state.
Compared with prior art, the utility model has the beneficial effects that: solving existing EDFA pump laser constant temperature
The steady-state error of control system temperature is larger, stability not high defect when by external interference.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
Under all utility models in the utility model are conceived, equivalent structure made based on the specification and figures of the utility model
Transformation, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (4)
1. a kind of thermostatic control system of EDFA pump laser, characterized in that it comprises: EDFA pump laser is used for
It detects the EDFA pump laser actual temperature signal and exports the first detection amplifying circuit of the first temperature signal, according to institute
The first computing module for stating the set temperature signal output temperature difference signal of the first temperature signal and EDFA pump laser, according to
First PID controller of the theory T EC current signal of the difference signals output pump laser, for detecting the EDFA
The TEC current signal of pump laser actually entered and the second detection amplifying circuit for exporting the first current signal, according to institute
The second computing module for stating theory T EC current signal and first current signal output current difference signal, according to the electric current
Difference signal exports the second PID controller of the second current signal, exports TEC current signal according to second current signal
TEC current control circuit；
The temperature signal output end of the EDFA pump laser is connect with the input terminal of the first detection amplifying circuit, and described first
The output end of detection amplifying circuit is connect with the input terminal of the first computing module, the output end and first of first computing module
The input terminal of PID controller connects, and the output end of first PID controller and the first input end of the second computing module connect
Connect, the output end of second computing module is connect with the input terminal of the second PID controller, second PID controller it is defeated
Outlet is connect with the input terminal of TEC current control circuit, and the first output end of the TEC current control circuit is put with the second detection
The input terminal connection of big circuit, the second output terminal of the TEC current control circuit and the input terminal of EDFA pump laser connect
It connects, the output end of the second detection amplifying circuit is connect with the second input terminal of the second computing module.
2. the thermostatic control system of EDFA pump laser as described in claim 1, which is characterized in that first detection is put
Big circuit includes the first operational amplifier, the non-inverting input terminal of first operational amplifier and the temperature of EDFA pump laser
Signal output end, the first end of first resistor, the connection of the first end of the second capacitor；The second termination power electricity of the first resistor
Pressure, and connect with the first end of first capacitor；The second end of the first capacitor is grounded, the second termination of second capacitor
Ground；
The output end of first operational amplifier and inverting input terminal, the first end of second resistance of the first operational amplifier connect
It connects, the second end of the second resistance is connect with the input terminal of the first end of third capacitor, the first computing module, the third electricity
The second end of appearance is grounded.
3. the thermostatic control system of EDFA pump laser as described in claim 1, which is characterized in that second detection is put
Big circuit includes second operational amplifier；
The non-inverting input terminal of the second operational amplifier is connect with the first end of the 5th resistance, the first end of the 4th capacitor, the
The second end of four capacitors is grounded；The second end of 5th resistance is connect with the first output end of TEC current control circuit, and passes through the
The parallel circuit that three resistance and the 4th resistance are constituted is grounded；
The inverting input terminal of the second operational amplifier is connect with the first end of the 7th resistance, the first end of the 8th resistance, the
The second end of seven resistance is grounded；
The output end of the second operational amplifier is connect with the first end of the 6th resistance, the second end of the 8th resistance connects；The
The second end of six resistance is connect with the second input terminal of the second computing module, the first end of the 5th capacitor connects, the 5th capacitor
Second end ground connection.
4. the thermostatic control system of EDFA pump laser as described in claim 1, which is characterized in that
The output end of second PID controller includes the first output end and second output terminal, the TEC current control circuit packet
First input end and the second input terminal are included, the second output terminal of the TEC current control circuit includes TEC+ output end and TEC-
Output end；
The TEC current control circuit includes: the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, third metal-oxide-semiconductor and the 4th metal-oxide-semiconductor；Described
The forward end of the grid of one metal-oxide-semiconductor and the second diode, the first end of eleventh resistor, the collector of the second triode, the 4th
The grid of metal-oxide-semiconductor connects, and the source electrode of first metal-oxide-semiconductor, the backward end of the second diode, the second termination of eleventh resistor are electric
Source voltage, the emitter ground connection of the second triode, the base stage of the second triode and the first end of twelfth resistor connect；12nd
Second input terminal of the second end of resistance as TEC current control circuit, and connect with the second output terminal of the second PID controller
It connects；The drain electrode of first metal-oxide-semiconductor is connect with the first end of the source electrode of the 4th metal-oxide-semiconductor, the second inductance；The second end of second inductance
As the TEC- output end of TEC current control circuit, and pass through the 7th capacity earth；
The grid and the forward end of first diode of second metal-oxide-semiconductor, the first end of the tenth resistance, third metal-oxide-semiconductor grid,
The collector of first triode connects, the emitter ground connection of first triode, the base stage and the 9th of first triode
The first end of resistance connects；First input end of the second end of 9th resistance as TEC current control circuit, and with the 2nd PID
First output end of controller connects；The drain electrode of the first end, third metal-oxide-semiconductor of the source electrode and the first inductance of second metal-oxide-semiconductor
Connection, TEC+ output end of the second end of first inductance as TEC current control circuit, and pass through the 6th capacity earth；
First output end of the drain electrode of second metal-oxide-semiconductor as TEC current control circuit, and the input with the second detection amplifying circuit
The drain electrode connection at end, the 4th metal-oxide-semiconductor；
The source electrode of the third metal-oxide-semiconductor, the backward end of first diode, the tenth resistance second termination supply voltage.
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| CN201820932641.4U CN208753725U (en) | 2018-06-15 | 2018-06-15 | The thermostatic control system of EDFA pump laser |
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| CN201820932641.4U CN208753725U (en) | 2018-06-15 | 2018-06-15 | The thermostatic control system of EDFA pump laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111338403A (en) * | 2020-03-17 | 2020-06-26 | 无锡雷利电子控制技术有限公司 | Control method and control system of PTC heating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111338403A (en) * | 2020-03-17 | 2020-06-26 | 无锡雷利电子控制技术有限公司 | Control method and control system of PTC heating device |
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