CN108508940A - laser temperature feedback regulation control circuit and method - Google Patents
laser temperature feedback regulation control circuit and method Download PDFInfo
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- CN108508940A CN108508940A CN201810280303.1A CN201810280303A CN108508940A CN 108508940 A CN108508940 A CN 108508940A CN 201810280303 A CN201810280303 A CN 201810280303A CN 108508940 A CN108508940 A CN 108508940A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
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Abstract
The invention discloses a kind of new laser temperature-control circuits, and the electric current for being output to the ends laser TEC is adjusted according to the laser temperature of feedback.Using STM32 chip controls ADN8830 temperature controlling chips, STM32 chips are output to the voltage of ADN8830 temperature controlling chips by adjusting, and control is output to the electric current at the ends laser TEC.The high current value, low current value and judgement temperature that laser TEC electric currents are arranged by knob control signal reach the boundary of setting value.By the temperature signal of ADN8830 temperature controlling chip feedback lasers, when laser temperature is not up to setting value, electric current output is controlled according to setting high current, increases temperature governing speed；When laser is up to temperature to setting value, electric current output is controlled according to the low current of setting, is increased and is adjusted stability.The present invention is not only small, but also using the method for temperature feedback, solves the contradiction between laser temperature governing speed and stable temperature control degree.
Description
Technical field
The present invention relates to semiconductor laser temperature control technology field, specially a kind of laser temperature feedback regulation control
Circuit processed and method.
Background technology
The most practical most important a kind of laser of semiconductor diode laser, small, long lifespan are logical in laser
It letter, optical storage, optical circulator, laser printing, ranging and radar etc. and has been widely used.Since it is extensive
Using, thus the design of laser drive control circuit seems particularly significant.
As the core of semiconductor laser, semiconductor laser diode（LD）Steady operation it is particularly significant.
However, in the engineering of laser works, the fever of laser can elevate the temperature, the output wavelength and output power of laser
It will be affected.Therefore, effective to laser progress and accurate temperature control is most important.
Currently, existing laser temperature control circuit is substantially the electric current output for being set as certain, work as laser
Temperature when reaching setting value, still exported according to the electric current.It is fast if necessary to governing speed, then the electric current can be arranged compared with
Greatly, after set temperature reaches, since control electric current is larger, then temperature adjust oscillation amplitude it is larger, stability and electric current compared with
Hour is compared to poor；And if using Small current control, although it is higher to reach the stability after set temperature, set not up to
When constant temperature is spent, the governing speed of temperature is slower.The stability of speed and adjusting that temperature is adjusted becomes contradiction.
Invention content
For the deficiency of existing laser temperature control circuit, the present invention provides a kind of laser temperature feedback regulation control electricity
Road, using temperature feedback control, when laser temperature is not up to setting value, electric current output is controlled according to setting high current
System increases temperature governing speed；When laser is up to temperature to setting value, electric current output is controlled according to setting low current,
Increase and adjusts stability.
The present invention adopts the following technical scheme that realization：
A kind of laser temperature feedback regulation control circuit, including input setting unit, signal processing unit, temperature control modules
With laser control temperature unit.
The signal processing unit uses STM32 chips, the temperature control modules to use ADN8830 chips；ADN8830
The VLIM pins of chip are connect with the PA4 pins of STM32 chips, the TEMPLOCK pins of ADN8830 chips and the PB9 of STM32
Pin connects, and constitutes and adjusts feedback control loop；The OUT A feet and OUT B feet of ADN8830 chips respectively with laser control temperature unit
The TEC- feet of TEC are connected with TEC+ feet, input terminal THERMIN feet and the temperature-sensitive in laser control temperature unit of ADN8830 chips
The anode connection of resistance.
The input setting unit includes slide rheostat RA1, slide rheostat RA2 and slide rheostat RA3, and sliding becomes
The one of resistance device RA1 terminates the PA5 pins of STM32 chips and is connect with VCC by R1, other end ground connection；Slide rheostat RA2
One termination STM32 chips PA6 pins and connect with VCC by R2, the other end be grounded；One end of slide rheostat RA3
It connects the PA7 pins of STM32 chips and is connect with VCC by R3, other end ground connection.
The characteristics of new laser temperature-control circuit is the laser temperature according to feedback, and adjusting is output to laser
The electric current at the ends TEC.Using STM32 chip controls ADN8830 temperature controlling chips, STM32 chips are output to ADN8830 temperature by adjusting
The voltage of chip is controlled, control is output to the electric current at the ends laser TEC.By inputting setting unit control signal, laser is set
High current value, low current value and the judgement temperature of TEC electric currents reach the boundary of setting value.It is fed back by ADN8830 temperature controlling chips
The temperature signal of laser, when laser temperature is not up to setting value, electric current output is controlled according to setting high current, is increased
Big temperature governing speed；When laser is up to temperature to setting value, electric current output is controlled according to the low current of setting, is increased
Adjust stability.This temperature control circuit is not only small, but also using the method for temperature feedback, solves laser temperature and adjust speed
Contradiction between degree and stable temperature control degree.
Laser temperature feedback regulation control method based on foregoing circuit is specific as follows：
Temperature signal is inputted ADN8830 chips by laser control temperature unit by temperature-sensitive output end, and STM32 chips are to ADN8830
The laser temperature signal of the TEMPLOCK feet feedback of chip carries out processing judgement, right if laser temperature reaches set temperature
ADN8830 temperature control modules control signal according to High-current output, which is input to by the PA4 feet of STM32 chips
The VLIM feet of ADN8830 chips, and then it is to set to control ADN8830 chips to be output to the TEC control electric currents of laser control temperature unit
The high current value set improves governing speed；If laser temperature is not up to set temperature, to ADN8830 chips according to small electricity
Stream output control signal, which is input to the VLIM feet of ADN8830 chips by the PA4 feet of STM32 chips, and then is controlled
The TEC control electric currents that ADN8830 chips are output to laser control temperature unit are the low current value of setting, improve stable temperature control
Degree.To solve the contradiction between laser temperature governing speed and stable temperature control degree.
The high current value and low current value are configured by inputting setting unit, are configured when to high current value
When, RA1 resistance values are adjusted, the voltage at the ends PA5 of STM32 chips changes at this time, and STM32 chips are AD converted the voltage, and
High current is set according to the transformation result and controls signal；When being configured to low current value, RA2 resistance values are adjusted, at this time STM32
The voltage at the ends PA6 of chip changes, and STM32 chips are AD converted the voltage, and the low electricity being arranged according to the transformation result
Flow control signals；When the boundary for stablizing judgement section to temperature is configured, RA3 resistance values are adjusted, at this time STM32 chips
The voltage at the ends PA7 changes, and STM32 chips are AD converted the voltage, is converted into the boundary value in judgement section.
The present invention has the characteristics that be usually embedded possessed by formula system, has stronger real-time and stabilization.Its advantage exists
In：Using the method for temperature feedback, when laser temperature is not up to setting value, electric current output is controlled according to setting high current
System increases temperature governing speed；When laser is up to temperature to setting value, electric current output is controlled according to the low current of setting
System increases and adjusts stability, solves the contradiction between laser temperature governing speed and stable temperature control degree；And it uses
Integrated chip is controlled, small.
Description of the drawings
Fig. 1 shows semiconductor laser temperature control structure schematic diagrames of the present invention.
Fig. 2 indication circuit key position connection figures.
Fig. 3 indicates the work flow diagram of the method for the present invention.
Specific implementation mode
Specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.
A kind of laser temperature feedback regulation control circuit, including input setting unit 1, signal processing unit 2, temperature control
Molding block 3 and laser control temperature unit 4.As shown in Figure 1,
Signal processing unit 2 is connected with temperature control modules 3, and signal processing unit 2 is set according to whether laser temperature reaches
Definite value, control are output to the signal of temperature control modules, which is that temperature control modules 3 feed back to signal processing unit
2.When temperature is not up to setting value signal processing unit 2 control 3 output signal of temperature control modules be high current signal extremely
Laser control temperature unit 4 improves the speed that temperature is adjusted；When temperature reaches setting value, signal processing unit 2 controls temperature control
3 output signal of molding block be low current signal to laser control temperature unit 4, improve temperature controlled stability.
Specifically as shown in Fig. 2, signal processing unit 2 uses STM32 chips, temperature control modules 3 to use ADN8830 cores
Piece.
The PA4 pins of STM32 chips are connected with the VLIM pins of ADN8830 chips, and STM32 chips are defeated by PA4 pins
The VLIM pins for going out to control signal to ADN8830 chips control it, the TEMPLOCK pins of ADN8830 chips with
The PB9 pins of STM32 chips connect, and the temperature signal of laser is fed back to STM32 chips by TEMPLOCK feet, constitutes temperature
Degree adjusts feedback control loop.The OUT A feet and OUT B feet of ADN8830 the chips TEC- with the TEC of laser control temperature unit 4 respectively
Foot is connected with TEC+ feet, and the input terminal THERMIN feet of ADN8830 chips and the thermistor in laser control temperature unit 4 are just
Pole connects.
The temperature adjusting of laser control temperature unit 4 is the set value calculation by electric current, there is high current value and low current value
Two nodes, the high current value and low current value are configured by inputting setting unit 1, as shown in Fig. 2, setting circuit
Structure be：It includes slide rheostat RA1, slide rheostat RA2 and slide rheostat RA3 to input setting unit 1, slides variable resistance
The one of device RA1 terminates the PA5 pins of STM32 chips and is connect with VCC by R1, other end ground connection；Slide rheostat RA2's
One terminates the PA6 pins of STM32 chips and is connect with VCC by R2, other end ground connection；A termination of slide rheostat RA3
The PA7 pins of STM32 chips and connect with VCC by R3, the other end ground connection.When it is implemented, signal inputs setting unit
For three knob keys：RA1、RA2、RA3.RA1 is used for being arranged the high current value for being output to laser temperature control electric current；RA2 is used
The low current value for being output to laser temperature and controlling electric current is arranged；RA3 is used for being arranged the decision boundaries that temperature reaches setting value,
Such as：The corresponding temperature of setting value is 0.01 DEG C, then in ± 0.01 DEG C of section of set temperature, is judged to reaching set temperature.
Laser temperature feedback regulation control method based on foregoing circuit, it is specific as follows：
Temperature signal is inputted ADN8830 chips by laser control temperature unit by temperature-sensitive output end, and STM32 chips are to ADN8830
The laser temperature signal of the TEMPLOCK pins feedback of chip carries out processing judgement, if laser temperature reaches set temperature,
Signal is controlled according to High-current output to ADN8830 temperature control modules, which is input to by the PA4 pins of STM32 chips
The VLIM pins of ADN8830 chips, and then control ADN8830 temperature controlling chips and laser is controlled according to high current pattern,
The TEC control electric currents that i.e. STM32 chip controls ADN8830 chips are output to laser control temperature unit 4 are the high current value of setting,
Improve governing speed；If laser temperature is not up to set temperature, control letter is exported according to low current to ADN8830 chips
Number, which is input to the VLIM pins of ADN8830 chips by the PA4 pins of STM32 chips, and then controls ADN8830
Temperature controlling chip controls laser according to low current pattern, i.e. STM32 chip controls ADN8830 chips are output to laser
The TEC control electric currents of control temperature unit 4 are the low current value of setting, improve stable temperature control degree.
The high current value and low current value are configured by inputting setting unit 1, are set when to high current value
When setting, RA1 resistance values are adjusted, the voltage at the ends PA5 of STM32 chips changes at this time, and STM32 chips are AD converted the voltage,
And high current is arranged according to the transformation result and controls signal；When being configured to low current value, RA2 resistance values are adjusted, at this time
The voltage at the ends PA6 of STM32 chips changes, and STM32 chips are AD converted the voltage, and according to transformation result setting
Low current controls signal；When the boundary for stablizing judgement section to temperature is configured, RA3 resistance values are adjusted, at this time STM32 chips
The voltage at the ends PA7 change, STM32 chips are AD converted the voltage, are converted into the boundary value in judgement section.Such as：Setting
It is 0.01 DEG C to be worth corresponding temperature, then in ± 0.01 DEG C of section of set temperature, is judged to reaching set temperature.
Fig. 3 is the workflow of embodiment of the present invention, and when operation starts, system is initialized, BUF1 after initialization,
The value of BUF2 and BUF3 is 0, and wherein BUF1, BUF2 and BUF3 are the buffer register inside the STM32 of program setting.Initialization
Afterwards, the input of setting to be controlled is waited, if without input, since BUF1 and BUF2 are equal to 0, the setting to be controlled such as will continue to
Input；If control setting inputs parameter, buffer can store set parameter, wherein：BUF1
High current value is stored, BUF2 stores low current value, and BUF3 stores interval limit.Judge whether BUF1 is more than BUF2, if BUF1 is small
In BUF2, then the high current value for representing setting is less than low current value, does not meet output control and requires, continues to control setting etc.
Parameter to be reset；If BUF1 is more than BUF2, set temperature is judged according to the result of the AD conversion of temperature feedback signal
Whether reach.
If set temperature reaches, buffer BUF deposits BUF1 is controlled（High current signal）Value, to ADN8830 temperature
Control module inputs High-current output and controls signal, and final ADN8830 temperature control modules carry out high current to laser temperature conditioning unit
Control, meanwhile, ADN8830 temperature control modules extract the temperature signal of laser temperature conditioning unit；If set temperature is not up to, control
Buffer BUF is stored in BUF2（Low current signal）Value, to ADN8830 temperature control modules input low current output control letter
Number, final ADN8830 temperature control modules carry out Small current control to laser temperature conditioning unit, meanwhile, the extraction of ADN8830 temperature control modules
The temperature signal of laser temperature conditioning unit.
The method that the above adjustment process uses temperature feedback, when laser temperature is not up to setting value, electric current output is pressed
It is controlled according to setting high current, increases temperature governing speed；When laser is up to temperature to setting value, electric current is exported according to setting
Fixed low current is controlled, and is increased and is adjusted stability, solve laser temperature governing speed and stable temperature control degree it
Between contradiction；And controlled using integrated chip, it is small.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although ginseng
It is described in detail according to the embodiment of the present invention, it will be understood by those of ordinary skill in the art that, to the technical side of the present invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical scheme of the present invention, should all cover the present invention's
In claims.
Claims (2)
1. a kind of laser temperature feedback regulation control circuit, it is characterised in that：Including inputting setting unit（1）, signal processing
Unit（2）, temperature control modules（3）With laser control temperature unit（4）；
The signal processing unit（2）Using STM32 chips, the temperature control modules（3）Using ADN8830 chips；
The VLIM pins of ADN8830 chips are connect with the PA4 pins of STM32 chips, the TEMPLOCK pins of ADN8830 chips with
The PB9 pins of STM32 connect, and constitute and adjust feedback control loop；The OUT A feet and OUT B feet of ADN8830 chips respectively with laser
Control temperature unit（4）TEC- feet connected with TEC+ feet, the THERMIN feet of ADN8830 chips and laser control temperature unit（4）In
The anode connection of thermistor；
The input setting unit（1）Including slide rheostat RA1, slide rheostat RA2 and slide rheostat RA3, sliding becomes
The one of resistance device RA1 terminates the PA5 pins of STM32 chips and is connect with VCC by R1, other end ground connection；Slide rheostat RA2
One termination STM32 chips PA6 pins and connect with VCC by R2, the other end be grounded；One end of slide rheostat RA3
It connects the PA7 pins of STM32 chips and is connect with VCC by R3, other end ground connection.
2. a kind of laser temperature feedback regulation control method, it is characterised in that：This method is based on laser described in claim 1
Device temperature feedback adjusting control circuit, it is specific as follows：
Temperature signal is inputted ADN8830 chips by laser control temperature unit by temperature-sensitive output end, and STM32 chips are to ADN8830
The laser temperature signal of the TEMPLOCK feet feedback of chip carries out processing judgement, right if laser temperature reaches set temperature
ADN8830 temperature control modules control signal according to High-current output, which is input to by the PA4 feet of STM32 chips
The VLIM feet of ADN8830 chips, and then control ADN8830 chips and be output to laser control temperature unit（4）TEC control electric current be
The high current value of setting improves governing speed；If laser temperature is not up to set temperature, to ADN8830 chips according to small
Electric current output control signal, which is input to the VLIM feet of ADN8830 chips by the PA4 feet of STM32 chips, and then is controlled
ADN8830 chips processed are output to laser control temperature unit（4）TEC control electric current be setting low current value, raising temperature control
Stability processed；
The high current value and low current value are by inputting setting unit（1）It is configured, is configured when to high current value
When, RA1 resistance values are adjusted, the voltage at the ends PA5 of STM32 chips changes at this time, and STM32 chips are AD converted the voltage, and
High current is set according to the transformation result and controls signal；When being configured to low current value, RA2 resistance values are adjusted, at this time STM32
The voltage at the ends PA6 of chip changes, and STM32 chips are AD converted the voltage, and the low electricity being arranged according to the transformation result
Flow control signals；When the boundary for stablizing judgement section to temperature is configured, RA3 resistance values are adjusted, at this time STM32 chips
The voltage at the ends PA7 changes, and STM32 chips are AD converted the voltage, is converted into the boundary value in judgement section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810280303.1A CN108508940B (en) | 2018-04-02 | 2018-04-02 | Laser temperature feedback regulation control circuit and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810280303.1A CN108508940B (en) | 2018-04-02 | 2018-04-02 | Laser temperature feedback regulation control circuit and method |
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| CN108508940A true CN108508940A (en) | 2018-09-07 |
| CN108508940B CN108508940B (en) | 2020-07-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462825A (en) * | 2020-11-18 | 2021-03-09 | 北京自动化控制设备研究所 | Low-power-consumption high-stability laser temperature closed-loop control system and method |
| WO2021209006A1 (en) * | 2020-04-16 | 2021-10-21 | 深圳见炬科技有限公司 | High-dimensional thermoelectrics-based great-heat and high-heat-flow-density heat transfer and heat dissipation method |
| CN113917622A (en) * | 2020-07-09 | 2022-01-11 | 青岛海信宽带多媒体技术有限公司 | Optical module |
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| CN112462825B (en) * | 2020-11-18 | 2022-03-11 | 北京自动化控制设备研究所 | Low-power-consumption high-stability laser temperature closed-loop control system and method |
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