CN100363852C - High-temperature temperature control apparatus for controlling optical crystal temperature - Google Patents
High-temperature temperature control apparatus for controlling optical crystal temperature Download PDFInfo
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- CN100363852C CN100363852C CNB2006100128301A CN200610012830A CN100363852C CN 100363852 C CN100363852 C CN 100363852C CN B2006100128301 A CNB2006100128301 A CN B2006100128301A CN 200610012830 A CN200610012830 A CN 200610012830A CN 100363852 C CN100363852 C CN 100363852C
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Abstract
The present invention relates to a high-temperature control apparatus for controlling the temperature of nonlinear crystals, which belongs to the technical field of temperature control apparatuses. The present invention is composed of a temperature control device (1), a furnace temperature raising speed control device (2), a protective device for overheating furnaces (3), a crystal furnace (4), and an integrated amplifying circuit (5). The high-temperature control apparatus of the present invention has the advantages that the high-temperature control apparatus of the present invention has accurate setting of operating point temperature and quasi uniform speed of temperature raising process and is provided with an automatic protective circuit for overheating, etc.
Description
Technical field
The present invention relates to a kind of temperature controller, specifically is to be used for the high-temperature temperature controller that nonlinear crystal is in use controlled its working temperature.
Background technology
Nonlinear optical process is a kind of effective technology of range of application and the existing lasing light emitter frequency range of expansion of expansion of laser light device, has been widely used in the optical systems such as harmonic wave generation and parametric process.For given wavelength and nonlinear material, the efficient of non-linear process depends on the phase matching degree to a great extent, when the phase misalignment dosage equals zero, and promptly under precise phase coupling temperature, non-linear process most effective.Generally realizing phase matching with two kinds of methods---critical phase-matching technique and noncritical phase matching technology, noncritical phase matching technology are exactly to make non-linear process satisfy phase-matching condition by the temperature that changes nonlinear crystal.For satisfying phase-matching condition, nonlinear crystal is operated in the level far above normal temperature sometimes, and the degree of phase matching depends primarily on the temperature control precision with crystal chosen of crystal temperature effect point.The making of this temperature controller becomes an important step that improves nonlinear optical process efficient.Thereby design and a kind ofly can accurately adjust crystal working point temperature and prevent that effectively the high-temperature temperature controller of crystal damage is very important.
The temperature controller that useful in the prior art temperature sensor AD 590 is made, [opinion] at paper " high-precision semiconductor laser diode temperature control system " Luo Zhongsheng, Zhang Meidun, He Yunfeng, hole auspicious sign " semiconductor optoelectronic " 2,115-119 (1999).In its temperature controlled processes, adopted precision voltage source and integration to discharge circuit, but in the temperature control equipment that utilizes the semiconductor refrigerating piece as control element, the semiconductor refrigerating piece can not bear long high temperature.Therefore, it is not suitable for using in the high-temperature temperature control system.
The temperature controller that the electric current amplification control circuit of useful in the prior art three differential amplifier circuits and two field effect transistor formations is made, [seeing in patent ZL01105811.0].Can realize quick, high precision refrigeration.But be not suitable for being used in the high-temperature temperature control device.In high temperature crystal stove temperature-rise period, the speed of crystal oven environment heat radiation towards periphery increases with the increase of it and the surrounding environment temperature difference, in the temperature-control circuit in front, Control current depends on the difference of the Be Controlled body temperature degree that temperature spot is set, difference is big more, Control current is big more, and vice versa.This just causes a pair of contradiction: crystal oven is when low temperature, and it is too fast to heat up, and rapid temperature variation can make crystal damage because of expanding with heat and contract with cold; When high temperature, it is slow to heat up, and does not even heat up, can not achieve effective control.Therefore, be not suitable for high-temperature temperature control yet.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can accurately set working point temperature, temperature-rise period standard at the uniform velocity and have a high-temperature temperature controller that is used to control the nonlinear crystal temperature of overheated automatic protection.
Technical solution of the present invention is as follows: a kind of high-temperature temperature controller that is used to control the nonlinear crystal temperature, be made up of temperature control equipment 1, furnace temperature raising speed control device 2, furnace temperature overtemperature protection system 3, crystal oven 4 and common-collector amplifier 5, it is characterized in that: two of pid control module 10 inputs are connected with the output of temperature setup unit 8, temperature sampling unit 9 respectively in the temperature control equipment 1; The temperature sensor Rt1 that is positioned at crystal oven 4 links to each other with the input of temperature sampling unit 9; Pid control module 10 is connected with the input end of common-collector amplifier 5 after furnace temperature raising speed control device 2 control, and the output terminal of common-collector amplifier 5 is connected with heating arrangement 17 in the crystal oven 4;
The output of the temperature sampling unit 9 in the described temperature control equipment 1 also is connected with the input of furnace temperature raising speed control device 2 and overtemperature protection system 3; the output of the pid control module 10 in the temperature control equipment 1 is connected with the output of furnace temperature raising speed control device 2, and the output of overtemperature protection system 3 is connected with the output of pid control module 10.
Upper limit potentiometer R1 in the temperature setup unit 8 links to each other with two terminals of accurate setting potentiometer R3 by the first and second forward voltage followers 6,7 respectively with the center tap of lower limit potentiometer R2, and the center tap of accurately setting potentiometer R3 links to each other with pid control module 10.
First and second comparator circuits 13 are arranged in the furnace temperature raising speed control device 2,14, the forward input of first comparator circuit 13 is connected with the output of temperature sampling unit 9, the output of temperature range potentiometer R6 is connected with the negative sense input of first comparator circuit 13, the negative sense input of second comparator circuit 14 is connected with the output of temperature sampling unit 9, the output of temperature range potentiometer R6 is connected with the forward input of second comparator circuit 14, the output of first comparator circuit 13 is connected with the control terminal of first electronic switch 11, the output of second comparator circuit 14 is connected with the control terminal of second electronic switch 12, the output of pid control module 10 and it are through one group of resistance R 4, the signal end G that obtains after the R5 dividing potential drop respectively with first and second electronic switches 11,12 input pin links to each other, first and second electronic switches 11,12 output pin is connected first and second comparator circuits 13 simultaneously with the input end of common-collector amplifier 5,14 input links to each other with the output of temperature sampling unit 9 with temperature range potentiometer R6 respectively.
The forward input of the 3rd comparator circuit 15 in the furnace temperature overtemperature protection system 3 is connected by resistance with the center tap of overheating protection potentiometer R7; the reverse input of the 3rd comparator circuit 15 is connected with the output of temperature sampling unit 9; the output of the 3rd comparator circuit 15 links to each other through the base stage of resistance with transistor 16; the collector of transistor 16 is connected with the output pin of first and second electronic switches 11,12; simultaneously link to each other the grounded emitter of transistor 16 with the input of common-collector amplifier 5.
Common-collector amplifier 5 is the Darlington pipe that two transistor common collectors connect to form.
The first and second forward voltage followers 6,7 all are to be made of operational amplifier.
The first, or the second, or the 3rd comparator circuit 13,14,15 is made of operational amplifier.
The present invention is used to control the high-temperature temperature controller of nonlinear crystal temperature and has compared following beneficial effect with background technology:
Furnace temperature raising speed control module guaranteed the temperature-rise period of crystal oven can standard at the uniform velocity, safety, finish fast.
2. furnace temperature overheating protection unit has overcome the damage of the furnace temperature too high Be Controlled crystal that may cause, heat-insulation layer, insulating material, heating arrangement.
3. the temperature setup unit has adopted bridge circuit, the precision problem of set point when having solved temperature controller and working in wide temperature range very.
High-temperature temperature controller that the present invention is used to control the nonlinear crystal temperature has realized that set-point precision height, temperature-rise period standard are at the uniform velocity and have a high-temperature temperature controller of automatic protection circuit.
Description of drawings
Fig. 1 is the theory diagram that the present invention is used to control the high-temperature temperature controller of nonlinear crystal temperature;
Fig. 2 is the high-temperature temperature controller conspectus that the present invention is used to control the nonlinear crystal temperature;
Fig. 3 is the circuit diagram of the pid control module 10 that uses among the present invention.
Embodiment
The present invention is used to control the concrete structure of the high-temperature temperature controller of nonlinear crystal temperature, as shown in Figure 2.It comprises five adjustable potentiometers that place on the casing, upper limit potentiometer R1, lower limit potentiometer R2, accurately sets potentiometer R3, temperature range potentiometer R6 and overheating protection potentiometer R7.In the high-temperature temperature controller, in order to satisfy various crystal and coupling demand to working temperature, need temperature controller in wide temperature range very, accurately to set the temperature of working point, and the range of adjustment of general potentiometer is limited, can not satisfy two requirements of wide region and high precision simultaneously.In order to address the above problem, we have designed the bridge-type temperature setting circuit, the magnitude of voltage A that the center tap of upper limit potentiometer R1 obtains by the first forward voltage follower 6 connects the terminal of accurate setting potentiometer R3, the magnitude of voltage B that the center tap of lower limit potentiometer R2 obtains by the second forward voltage follower 7 connects another terminal of accurate setting potentiometer R3, accurately set the positive input that value C that the center tap dividing potential drop of potentiometer R3 obtains connects pid control module 10, temperature sampling circuit 9 as shown in Figure 2: constitute by temperature sensor Rt1 and a resistance series connection.When setting the working point temperature, we at first regulate the magnitude of voltage A that upper limit potentiometer R1 obtains a little higher than target temperature point, regulate the magnitude of voltage B that lower limit potentiometer R2 is lower than target temperature point slightly then, utilize at last and accurately set potentiometer R3 is fine-tuning to target temperature point in the minizone of A and B decision magnitude of voltage C.The value L that obtains through resistance and temperature sensor Rt1 dividing potential drop connects the negative input of pid control module 10, temperature sensor Rt1 adopts the thermistor of negative temperature coefficient, when the actual temperature value of controlled crystal oven 4 is lower than set temperature value, magnitude of voltage C is greater than magnitude of voltage L, the output valve F of pid control module 10 is bigger, the signal I that F supplies with heating arrangement 17 through common-collector amplifier 5 is bigger, and controlled crystal oven 4 heats up.When the actual temperature value of controlled crystal oven 4 was higher than set temperature value, magnitude of voltage C was less than magnitude of voltage L, and the output valve F of pid control module 10 is less, and the signal I that F supplies with heating arrangement 17 through common-collector amplifier 5 is less, controlled crystal oven 4 coolings.
Furnace temperature raising speed control device 2 is used for controlling crystal oven 4 with at the uniform velocity process intensification of standard.In crystal oven temperature elevation process, the speed of intensification is by the difference decision that adds heat and heat dissipation capacity.The speed of heating is by the size of current decision of supplying with heating arrangement 17, and during low temperature, the electric current that pid control module 10 is supplied with heating arrangement 17 is bigger, and firing rate is very fast, and temperature is high more, and firing rate is slow more.The temperature of the speed and crystal oven self of heat radiation is relevant, and temperature is high more, and it is fast more to dispel the heat.This just causes a pair of contradiction, and when the speed that crystal oven can be born with crystal when the initialization circuit parameter at low-temperature space heated up, crystal oven heated up slower in the high-temperature region, even can not be elevated to design temperature.When the initialization circuit parameter made crystal oven 4 heat up with acceptable speed in the high-temperature region, crystal oven 4 heated up too fast at low-temperature space, and what surpass that crystal can bear expands with heat and contract with cold limit and damage crystal.In order to solve this contradiction, we have designed furnace temperature raising speed control device 2.Furnace temperature raising speed control device 2 is as shown in Figure 2: be made of resistance, potentiometer, comparator circuit and electronic switch.After temperature range potentiometer R6 sets, the temperature voltage value J that reflection is preset connects the positive input of first comparator circuit 13 and the reverse input end of second comparator circuit 14, the output valve L of reflection actual temperature connects the negative input of first comparator circuit 13 and the positive input of second comparator circuit 14, press said process first and second comparator circuits 13,14 always are in an output high level, the duty of another output low level, when temperature is low, the output valve E of second comparator circuit 14 is a high level, 12 conductings of second electronic switch, first electronic switch 11 disconnects, less signal G is inserted common-collector amplifier 5, reduce the programming rate of low-temperature space, prevent crystal damage.When temperature was higher, the output valve D of first comparator circuit 13 was a high level, 11 conductings of first electronic switch, and second electronic switch 12 disconnects, and bigger signal F is inserted common-collector amplifier 5, improves the programming rate of high-temperature region, and temperature-rise period is finished fast.
When some unpredictable situations caused that crystal oven 4 temperature surpass certain value, overtemperature protection system 3 started, and was used for preventing the too high damage to optical element and crystal oven 4 itself of temperature.Overtemperature protection system is as shown in Figure 2: be made of potentiometer, comparator circuit and transistor.After overheated protection potential device R7 sets; the temperature voltage value K that reflection is preset connects the positive input of the 3rd comparator circuit 15; the output valve L of reflection actual temperature connects the negative input of the 3rd comparator circuit 15; the output terminal of the 3rd comparator circuit 15 connects the base stage of transistor 16 through resistance; the collector of transistor 16 connects the input of common-collector amplifier 5, grounded emitter.When the temperature of controlled crystal oven 4 is lower than the setting of overheating protection potentiometer R7, the 3rd comparator circuit 15 output low levels, transistor 15 promotes common-collector amplifier 5 operate as normal by, signal H, and temperature controller is in the temperature state of a control.When the temperature of controlled crystal oven 4 is higher than the setting of overheating protection potentiometer R7, the 3rd comparator circuit 15 output high level, transistor 15 conductings; signal H is a low level, common-collector amplifier 5 by, heating arrangement 17 quits work; crystal oven 4 temperature descend, and play superheat protecting function.
Regulate the magnitude of voltage A that upper limit potentiometer R1 obtains a little higher than target temperature point, regulate the magnitude of voltage B that lower limit potentiometer R2 is lower than target temperature point slightly then, utilize at last and accurately set potentiometer R3 is fine-tuning to target temperature point in the minizone of A and B decision magnitude of voltage C; After temperature range potentiometer R6 sets, the temperature voltage value B that reflection is preset imports the positive input of first comparator circuit 13 and the negative input of second comparator circuit 14, and the output valve A of reflection actual temperature imports the negative input of first comparator circuit 13 and the positive input of second comparator circuit 14.Always be in the duty of an output high level, another output low level by said process first and second comparator circuits 13,14, control the duty of first and second electronic switches 11,12 by output valve D, the E of first and second comparator circuits 13,14, send into heating arrangement 17 to select the signal F, the G that vary in size for use; After overheated protection potential device R7 sets; the temperature voltage value C that reflection is preset and the output valve A of reflection actual temperature send into the 3rd comparator circuit 15; the break-make of the output decision transistor 16 of the 3rd comparator circuit 15; when transistor 16 conductings; the voltage drop H of collection emitter-base bandgap grading is a low level; be not enough to promote common-collector amplifier 5 work; the electric current of supplying with heating arrangement 17 is zero; crystal oven 4 temperature descend; play superheat protecting function; when transistor 16 ended, the voltage drop H of collection emitter-base bandgap grading was a high level, common-collector amplifier 5 operate as normal.
The components and parts that the present invention adopts, the thermistor B57550G0104 of the negative temperature coefficient that electronic devices and components company provided when wherein temperature sensor adopted Europe in the temperature sampling unit 9, the resistance during normal temperature is 100K Ω.The used operational amplifier of comparator circuit all adopts LM358, the used operational amplifier of voltage follower adopts LM358, transistor 16 adopts 9013, common-collector amplifier 5 by two models be 9013 and the Darlington pipe that connects to form of D1047 transistor common collector serve as, the model of electronic switch is CD4066, the BOURNS 3590S-2-10 that potentiometer all adopts Mexico to produce, maximum adjustable joint 10 circles.Pid control module 10 adopts the circuit that often uses when general temperature is controlled, physical circuit figure as shown in Figure 3.Pid control module 10 is made up of difference input circuit 18 and Pid circuit 19, the output signal L of the output signal C of temperature setup unit 8 and temperature sampling unit 9 is respectively from the negative input and the positive input input difference input circuit 18 of difference input circuit 18, the output of difference input circuit 18 is connected with the input end of Pid circuit 19, and the output terminal of Pid circuit 19 is exactly the output terminal of Pid control module 10.
We have made a high-temperature temperature controller model machine with components and parts recited above, and as follows to its performance measurement:
The control accuracy of temperature controller of the present invention is 0.05 ℃, and the frequency-doubling crystal LBO of inner cavity frequency-doubling laser is carried out temperature control, and when frequency multiplication 1064nm laser, the temperature of crystal working point is 148 ℃.Desired temperature can be as accurate as 0.01 ℃.When the temperature range cut-point of furnace temperature raising speed control module 2 was made as 110 ℃, temperature value rose to the predetermined work point safely, and then we have tested the performance of furnace temperature overheating protection unit 3, set 160 ℃ and was the warning temperature.We heighten set temperature value to 170 ℃, and when furnace body temperature surpassed the warning temperature, furnace temperature overheating protection unit 3 cut off the control of temperature control units to crystal oven, and the crystal oven temperature begins to descend, and has effectively protected crystal and crystal oven.Can effectively prolong the serviceable life of crystal.
The present invention is by the design of disclosed several circuit, solved some problems that temperature-control circuit occurs and special nonlinear crystal has been taked special safeguard measure when control high temperature.Adopt different circuit component and circuit parameter, can realize different embodiments.
Claims (6)
1. be used to control the high-temperature temperature controller of nonlinear crystal temperature, be made up of temperature control equipment (1), furnace temperature raising speed control device (2), furnace temperature overtemperature protection system (3), crystal oven (4) and common-collector amplifier (5), it is characterized in that: two inputs of pid control module (10) are connected with the output of temperature setup unit (8), temperature sampling unit (9) respectively in the temperature control equipment (1); The temperature sensor Rt1 that is positioned at crystal oven (4) links to each other with the input of temperature sampling unit (9); Pid control module (10) is connected with the input end of common-collector amplifier (5) after furnace temperature raising speed control device (2) control, and the output terminal of common-collector amplifier (5) is connected with heating arrangement (17) in the crystal oven (4);
The output of the temperature sampling unit (9) in the described temperature control equipment (1) also is connected with the input of furnace temperature raising speed control device (2) with overtemperature protection system (3); the output of the pid control module (10) in the temperature control equipment (1) is connected with the output of furnace temperature raising speed control device (2), and the output of overtemperature protection system (3) is connected with the output of pid control module (10).
2. the high-temperature temperature controller that is used to control the nonlinear crystal temperature according to claim 1, it is characterized in that upper limit potentiometer R1 in the described temperature setup unit (8) and the center tap of lower limit potentiometer R2 link to each other with two terminals of accurate setting potentiometer R3 by the first and second forward voltage followers (6,7) respectively, the center tap of accurately setting potentiometer R3 links to each other with pid control module (10).
3. the high-temperature temperature controller that is used to control the nonlinear crystal temperature according to claim 1, it is characterized in that first and second comparator circuits (13 are arranged in the furnace temperature raising speed control device (2), 14), the forward input of first comparator circuit (13) is connected with the output of temperature sampling unit (9), the output of temperature range potentiometer R6 is connected with the negative sense input of first comparator circuit (13), the negative sense input of second comparator circuit (14) is connected with the output of temperature sampling unit (9), the output of temperature range potentiometer R6 is connected with the forward input of second comparator circuit (14), the output of first comparator circuit (13) is connected with the control terminal of first electronic switch (11), the output of second comparator circuit (14) is connected with the control terminal of second electronic switch (12), the output of pid control module (10) and it are through one group of resistance R 4, the signal end G that obtains after the R5 dividing potential drop respectively with first and second electronic switches (11,12) input pin links to each other, first and second electronic switches (11,12) output pin is connected first and second comparator circuits (13 with the input end of common-collector amplifier (5) simultaneously, 14) input links to each other with the output of temperature sampling unit (9) with temperature range potentiometer R6 respectively;
The forward input of the 3rd comparator circuit (15) in the furnace temperature overtemperature protection system (3) is connected by resistance with the center tap of overheating protection potentiometer R7; the reverse input of the 3rd comparator circuit (15) is connected with the output of temperature sampling unit (9); the output of the 3rd comparator circuit (15) links to each other through the base stage of resistance with transistor (16); the collector of transistor (16) is connected with the output pin of first and second electronic switches (11,12); simultaneously link to each other the grounded emitter of transistor (16) with the input of common-collector amplifier (5).
4. the high-temperature temperature controller that is used to control the nonlinear crystal temperature according to claim 1 is characterized in that described common-collector amplifier (5) is the Darlington pipe that two transistor common collectors connect to form.
5. control the high-temperature temperature controller of nonlinear crystal temperature according to being used to described in the claim 2, it is characterized in that the first and second forward voltage followers (6,7) all are to be made of operational amplifier.
6. according to claim 3 and the 4 described high-temperature temperature controllers that are used to control the nonlinear crystal temperature, it is characterized in that described the first, or the second, or the 3rd comparator circuit (13,14,15) is made of operational amplifier.
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| CNB2006100128301A CN100363852C (en) | 2006-06-13 | 2006-06-13 | High-temperature temperature control apparatus for controlling optical crystal temperature |
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| CNB2006100128301A CN100363852C (en) | 2006-06-13 | 2006-06-13 | High-temperature temperature control apparatus for controlling optical crystal temperature |
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| CN101392371B (en) * | 2007-09-21 | 2010-05-19 | 中国科学院沈阳自动化研究所 | Basal plate preheating system formed by laser metal deposition |
| CN115389438A (en) * | 2022-10-26 | 2022-11-25 | 杭州泽天春来科技有限公司 | Spectrum appearance |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6659361B2 (en) * | 2000-05-02 | 2003-12-09 | Nishiyama Corporation | Temperature control device |
| CN2615712Y (en) * | 2003-05-09 | 2004-05-12 | 哈尔滨工业大学 | Adaptive fuzzy controller for electric heating boiler |
| CN2664286Y (en) * | 2003-10-22 | 2004-12-15 | 华中科技大学 | A thermostatic crystal oscillator |
| CN1568564A (en) * | 2000-11-22 | 2005-01-19 | 维思克斯公司 | Temperature actuated positioning device for non-linear optical elements |
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- 2006-06-13 CN CNB2006100128301A patent/CN100363852C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6659361B2 (en) * | 2000-05-02 | 2003-12-09 | Nishiyama Corporation | Temperature control device |
| CN1568564A (en) * | 2000-11-22 | 2005-01-19 | 维思克斯公司 | Temperature actuated positioning device for non-linear optical elements |
| CN2615712Y (en) * | 2003-05-09 | 2004-05-12 | 哈尔滨工业大学 | Adaptive fuzzy controller for electric heating boiler |
| CN2664286Y (en) * | 2003-10-22 | 2004-12-15 | 华中科技大学 | A thermostatic crystal oscillator |
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