CN105223982A - The accurate attemperating unit of ultrared single-photon detector - Google Patents
The accurate attemperating unit of ultrared single-photon detector Download PDFInfo
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- CN105223982A CN105223982A CN201510585608.XA CN201510585608A CN105223982A CN 105223982 A CN105223982 A CN 105223982A CN 201510585608 A CN201510585608 A CN 201510585608A CN 105223982 A CN105223982 A CN 105223982A
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Abstract
The present invention discloses the accurate temperature control circuit of a kind of ultrared single-photon detector, one end ground connection that resistance R3 is connected with resistance R4; The output terminal of instrumentation amplifier U1 is divided into two-way, and single-chip microcomputer is exported in a road after resistance R5 and resistance R6 dividing potential drop, another road and PID arithmetic model calling; The input end of CMOS type operational amplifier U2 is connected with the output port of instrumentation amplifier U1; The output terminal of CMOS type operational amplifier U2 is connected with D class audio frequency power amplifier module; Input end IN_P is connected with the output terminal of CMOS type operational amplifier U2, and input end IN_N is that external reference voltages Vref holds; Output terminal OUT_P and output terminal OUT_N is for exporting control signal to control the temperature of ultrared single-photon detector.The present invention allows TEC not only can be operated in refrigerating state but also can be operated in the state of heating, and whole temperature control circuit precision can reach 0.01 DEG C.
Description
Technical field
The present invention relates to a kind of for the accurate temperature control circuit of ultrared single-photon detector, the accurate attemperating unit of total ultrared single-photon detector after particularly relating to.
Background technology
Single photon detection is as an important Technique of Weak Signal Detection, and in the subjects such as physics, uranology, chemistry, biology, medical science, various fields all has and applies very widely.At present, in the research of quantum information science, a large amount of single photon that adopts is as the carrier of quantum information, and therefore single photon detection technology plays vital effect.Single-photon detector can detect the single photon carrying quantum information, and is converted to electric signal output, then extracts the quantum information entrained by single photon by the means such as coincidence measurement, counting.
Operationally due to device self technological problems, when environment temperature changes, they can produce certain temperature drift to ultrared single-photon detector, the detection efficiency that the drift of device temperature result in detector changes, and needs a kind of temperature control circuit of precision to carry out to the device that temperature drift can occur the detection efficiency not temperature influence that temperature control ensures detector.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of ultrared single-photon detector accurate attemperating unit for above-mentioned the deficiencies in the prior art.The accurate attemperating unit of this ultrared single-photon detector can carry out thermostatic control to the device easily producing temperature drift, their working temperature is controlled all the time at a steady state value and accuracy of temperature control will reach 0.01 DEG C.
For realizing above-mentioned technical purpose, the technical scheme that the present invention takes is: the accurate temperature control circuit of ultrared single-photon detector, comprises the temperature bridge, instrumentation op amplification module, PID arithmetic module and the D class audio frequency power amplifier module that are electrically connected successively; It is characterized in that:
Described temperature bridge comprises resistance R1, resistance 2, resistance R3 and resistance R4; Resistance R4 is thermistor, and resistance R3 is equalized temperature resistance; Resistance R1, resistance 2, resistance R3 and resistance R4 are in turn connected to form loop, one end ground connection that described resistance R3 is connected with resistance R4;
Described instrumentation op amplification module comprises instrumentation amplifier U1, and described instrumentation amplifier U1 comprises two input ends and is connected with the ungrounded end of resistance R4 with the ungrounded end of resistance R3 respectively; Instrumentation amplifier U1 also comprises an external reference voltages Vref and holds and an output terminal; Instrumentation op amplification module also comprises resistance R5 and resistance R6; The output terminal of described instrumentation amplifier U1 is divided into two-way, and a road, after resistance R5 and resistance R6 dividing potential drop, shows current operating temperature in real time for exporting to single-chip microcomputer, another road and PID arithmetic model calling;
PID arithmetic module comprises CMOS type operational amplifier U2; Described CMOS type operational amplifier U2 comprises external reference voltages Vref end, an input end and an output terminal; The input end of CMOS type operational amplifier U2 is connected with the output port of instrumentation amplifier U1; The output terminal of CMOS type operational amplifier U2 is connected with D class audio frequency power amplifier module;
D class audio frequency power amplifier module comprises D class audio frequency power amplifier U3, and described D class audio frequency power amplifier U3 comprises two input end IN_P, input end IN_N, output terminal OUT_P and output terminal OUT_N; Input end IN_P is connected with the output terminal of CMOS type operational amplifier U2, and input end IN_N is that external reference voltages Vref holds;
Output terminal OUT_P and output terminal OUT_N is for exporting control signal to control the temperature of ultrared single-photon detector.
Further, described D class audio frequency power amplifier U3 also comprises temperature circuit current detecting end and temperature circuit Enable Pin.
The present invention is primarily of thermistor R4 and chip U1, U2, U3 composition.Thermistor R4 adopts PT1000 metal platinum resistance, and precision 0.01 DEG C, temperature range reach ± and 100 DEG C.U1 is instrumentation amplifier, has the advantages such as gain is large, precision is high, stability is strong.U2 is a CMOS type operational amplifier, has that output area is large, gain high, is also the core devices of PID circuit simultaneously.U3 is a D class audio frequency power amplifier chips, there is extremely low output impedance and larger draw current capacity, peak power output can reach 40W, chip U3 also possesses the advantage of current sense function and bi-directional drive in addition, achieves the double-direction control of Real-Time Monitoring to whole refrigeration circuit working current and TEC cooling and warming.
Resistance R4 is thermistor PT1000, samples by the working temperature of temperature controlling device with it.Resistance R3 is equalized temperature resistance, its resistance is exactly resistance value when being reached design temperature by temperature controlling device temperature corresponding to PT1000, thermistor R4 and equalized temperature resistance R3 and two other resistance R1, R2, these four resistance constitute a temperature bridge, two output terminals of electric bridge be thermistor PT1000 real-time sampling respectively to the magnitude of voltage that converts to through electric bridge of temperature and the partial pressure value of equalized temperature resistance inside electric bridge, when both pressure reduction are not equal to 0, illustrate and also not reached by the temperature of temperature controlling device or to exceed set temperature value, TEC is needed to carry out freezing or heating.
Chip U1 is a instrumentation amplifier, and two, left side pin is the differential input end of instrumentation amplifier, and two, right side pin is instrumentation amplifier external reference voltages Vref and output terminal respectively.The magnitude of voltage that the temperature that thermistor PT1000 samples converts to through electric bridge and the partial pressure value of equalized temperature resistance inside electric bridge are input to the input end of U1 respectively, export after both pressure reduction amplifies by U1.Suppose that the input pin pressure reduction of U1 is Vin, the enlargement factor of U1 is Au, so output voltage Vo=Vref+Vin*Au of U1, when being reached design temperature by the working temperature of temperature controlling device, then temperature bridge balance, Vin just equals 0, and now the output voltage Vo of U1 just equals Vref, and equalized temperature voltage is Vref.U1 output voltage is divided into two-way and exports, and the first via is exported to single-chip microcomputer after being through resistance R5 and resistance R6 dividing potential drop and shown current operating temperature in real time, and the second tunnel is then directly output to chip U2.
Chip U2 is a CMOS type operational amplifier, and it is the kernel control chip of PID circuit, and the left side of U2 is its input end and external reference voltages Vref (sharing same reference voltage with U1) respectively, and this voltage is equalized temperature voltage.When controlled device temperature does not reach design temperature, namely the output voltage Vo of U1 is not equal to Vref, difference between the output voltage Vo of U1 and equalized temperature voltage Vref is carried out ratio, differential and integral operation by PID circuit, and the voltage after computing exports to D class audio frequency power amplifier chips U3 from the right side pin of U2.When controlled device temperature reaches setting working temperature, namely the output voltage Vo of U1 equals Vref, and the difference now between it and equalized temperature voltage Vref is 0, so the output voltage of U2 is still Vref after ratio, differential and integral operation.
Chip U3 is a D class audio frequency power amplifier chips, two input ends IN_P, IN_N respectively on the left of chip, U3 be by this bipod between pressure reduction amplify after export from right side OUT_P, OUT_N two pins, suppose that the input voltage of the IN_P pin of U3 is Vp, the input voltage of IN_N pin is Vn, right side output pin OUT_P output voltage is Voutp, OUT_N output voltage is Voutn.As Vp>Vn, then Voutp>Voutn, U3 export as positive current; As Vp<Vn, then Voutp<Voutn, U3 export as negative current; As Vp=Vn, then Voutp=Voutn, U3 output current is 0.
Because the input end IN_P pin voltage Vp of U3 is the output voltage of chip U2, IN_N pin voltage Vn is equalized temperature voltage Vref, so as Vp>Vref, illustrate that controlled device temperature has exceeded design temperature and needed TEC to carry out refrigeration cool-down, now chip U3 exports positive current, TEC refrigeration cool-down.As Vp<Vref, illustrate that controlled device temperature needs TEC to carry out intensification lower than design temperature and heats, now chip U3 exports negative current, and TEC heats intensification.As Vp=Vref, illustrate that controlled device temperature has reached design temperature and do not needed TEC to work, now chip U3 output current is that 0, TEC quits work.
Below chip U3, two pins have current detecting and ena-bung function respectively.Current sense pin be when TEC damage or chip U3 work abnormal cause temperature control circuit ER effect large time, exports the control system that a high level feeds back to single-photon detector, system then can by this pin closedown temperature control circuit to avoid wafer damage.Circuit enable pin, by arranging low and high level to close or opening temp. control circuit, can reach Based Intelligent Control.
The present invention utilizes high-accuracy metal platinum thermistor PT1000 to sample to device real time temperature, the temperature signal that collection is returned and set temperature value compare, if sample temperature is greater than setting value, illustrating that device temperature is too high needs cooling, utilize semiconductor cooler (hereinafter referred to as TEC) to freeze to device, otherwise then heat.Because temperature exists inertia, so whole control procedure adopts the closed-loop control of hardware PID circuit realiration, precision is high, stability is strong.
In a word, the present invention is based on hardware PID circuit and closed-loop control is carried out to whole temperature sampling process, utilize the two-way operation characteristic of D class audio frequency power amplifier chips to allow TEC not only can be operated in refrigerating state but also can be operated in the state of heating, whole temperature control circuit precision can reach 0.0.1 DEG C.
Accompanying drawing explanation
Fig. 1 is circuit module schematic diagram of the present invention.
Fig. 2 is electrical block diagram of the present invention.
Below in conjunction with accompanying drawing, this embodiment is described further.
Embodiment
See Fig. 1 and Fig. 2, the accurate temperature control circuit of this ultrared single-photon detector, comprises the temperature bridge, instrumentation op amplification module, PID arithmetic module and the D class audio frequency power amplifier module that are electrically connected successively; Described temperature bridge comprises resistance R1, resistance 2, resistance R3 and resistance R4; Resistance R4 is thermistor, and resistance R3 is equalized temperature resistance; Resistance R1, resistance 2, resistance R3 and resistance R4 are in turn connected to form loop, one end ground connection that described resistance R3 is connected with resistance R4; Described instrumentation op amplification module comprises instrumentation amplifier U1, and described instrumentation amplifier U1 comprises two input ends and is connected with the ungrounded end of resistance R4 with the ungrounded end of resistance R3 respectively; Instrumentation amplifier U1 also comprises an external reference voltages Vref and holds and an output terminal; Instrumentation op amplification module also comprises resistance R5 and resistance R6; The output terminal of described instrumentation amplifier U1 is divided into two-way, and a road, after resistance R5 and resistance R6 dividing potential drop, shows current operating temperature in real time for exporting to single-chip microcomputer, another road and PID arithmetic model calling; PID arithmetic module comprises CMOS type operational amplifier U2; Described CMOS type operational amplifier U2 comprises external reference voltages Vref end, an input end and an output terminal; The input end of CMOS type operational amplifier U2 is connected with the output port of instrumentation amplifier U1; The output terminal of CMOS type operational amplifier U2 is connected with D class audio frequency power amplifier module; D class audio frequency power amplifier module comprises D class audio frequency power amplifier U3, and described D class audio frequency power amplifier U3 comprises two input end IN_P, input end IN_N, output terminal OUT_P and output terminal OUT_N; Input end IN_P is connected with the output terminal of CMOS type operational amplifier U2, and input end IN_N is that external reference voltages Vref holds; Output terminal OUT_P and output terminal OUT_N is for exporting control signal to control the temperature of ultrared single-photon detector.Described D class audio frequency power amplifier U3 also comprises temperature circuit current detecting end and temperature circuit Enable Pin.
Claims (2)
1. the accurate temperature control circuit of ultrared single-photon detector, comprises the temperature bridge, instrumentation op amplification module, PID arithmetic module and the D class audio frequency power amplifier module that are electrically connected successively; It is characterized in that:
Described temperature bridge comprises resistance R1, resistance 2, resistance R3 and resistance R4; Resistance R4 is thermistor, and resistance R3 is equalized temperature resistance; Resistance R1, resistance 2, resistance R3 and resistance R4 are in turn connected to form loop, one end ground connection that described resistance R3 is connected with resistance R4;
Described instrumentation op amplification module comprises instrumentation amplifier U1, and described instrumentation amplifier U1 comprises two input ends and is connected with the ungrounded end of resistance R4 with the ungrounded end of resistance R3 respectively; Instrumentation amplifier U1 also comprises an external reference voltages Vref and holds and an output terminal; Instrumentation op amplification module also comprises resistance R5 and resistance R6; The output terminal of described instrumentation amplifier U1 is divided into two-way, and a road, after resistance R5 and resistance R6 dividing potential drop, shows current operating temperature in real time for exporting to single-chip microcomputer, another road and PID arithmetic model calling;
PID arithmetic module comprises CMOS type operational amplifier U2; Described CMOS type operational amplifier U2 comprises external reference voltages Vref end, an input end and an output terminal; The input end of CMOS type operational amplifier U2 is connected with the output port of instrumentation amplifier U1; The output terminal of CMOS type operational amplifier U2 is connected with D class audio frequency power amplifier module;
D class audio frequency power amplifier module comprises D class audio frequency power amplifier U3, and described D class audio frequency power amplifier U3 comprises two input end IN_P, input end IN_N, output terminal OUT_P and output terminal OUT_N; Input end IN_P is connected with the output terminal of CMOS type operational amplifier U2, and input end IN_N is that external reference voltages Vref holds;
Output terminal OUT_P and output terminal OUT_N is for exporting control signal to control the temperature of ultrared single-photon detector.
2. the accurate temperature control circuit of the ultrared single-photon detector according to right and ball difficult to understand 1, is characterized in that:
Described D class audio frequency power amplifier U3 also comprises temperature circuit current detecting end and temperature circuit Enable Pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510585608.XA CN105223982B (en) | 2015-04-06 | 2015-09-15 | Ultrared single-photon detector precision temperature control circuit |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510157926.6A CN104750138A (en) | 2015-04-06 | 2015-04-06 | Precision temperature control device for infrared single-photon detector |
| CN2015101579266 | 2015-04-06 | ||
| CN201510585608.XA CN105223982B (en) | 2015-04-06 | 2015-09-15 | Ultrared single-photon detector precision temperature control circuit |
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| Publication Number | Publication Date |
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| CN105223982A true CN105223982A (en) | 2016-01-06 |
| CN105223982B CN105223982B (en) | 2017-08-29 |
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| CN201510157926.6A Withdrawn CN104750138A (en) | 2015-04-06 | 2015-04-06 | Precision temperature control device for infrared single-photon detector |
| CN201510585608.XA Active CN105223982B (en) | 2015-04-06 | 2015-09-15 | Ultrared single-photon detector precision temperature control circuit |
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| CN201510157926.6A Withdrawn CN104750138A (en) | 2015-04-06 | 2015-04-06 | Precision temperature control device for infrared single-photon detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111258351A (en) * | 2020-03-17 | 2020-06-09 | 国开启科量子技术(北京)有限公司 | Single photon detector TEC temperature control method and device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111351586B (en) * | 2020-03-20 | 2021-03-30 | 山东大学 | Integrated low-delay active quenching near-infrared single-photon detector |
Citations (5)
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| CN1694321A (en) * | 2005-06-09 | 2005-11-09 | 上海大学 | Automatic power and temp. controller for pumping laser |
| CN101404376A (en) * | 2008-10-27 | 2009-04-08 | 无锡市中兴光电子技术有限公司 | Automatic temperature control apparatus of pump laser for ASE broadband light source |
| CN204087018U (en) * | 2014-06-12 | 2015-01-07 | 南京信息工程大学 | A kind of temperature control system of semiconductor laser |
| CN104331100A (en) * | 2013-07-22 | 2015-02-04 | 东荣（天津）机电有限公司 | Infrared heating control system |
| CN204965220U (en) * | 2015-09-15 | 2016-01-13 | 安徽问天量子科技股份有限公司 | Accurate temperature control device of infrared single -photon detector |
-
2015
- 2015-04-06 CN CN201510157926.6A patent/CN104750138A/en not_active Withdrawn
- 2015-09-15 CN CN201510585608.XA patent/CN105223982B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1694321A (en) * | 2005-06-09 | 2005-11-09 | 上海大学 | Automatic power and temp. controller for pumping laser |
| CN101404376A (en) * | 2008-10-27 | 2009-04-08 | 无锡市中兴光电子技术有限公司 | Automatic temperature control apparatus of pump laser for ASE broadband light source |
| CN104331100A (en) * | 2013-07-22 | 2015-02-04 | 东荣（天津）机电有限公司 | Infrared heating control system |
| CN204087018U (en) * | 2014-06-12 | 2015-01-07 | 南京信息工程大学 | A kind of temperature control system of semiconductor laser |
| CN204965220U (en) * | 2015-09-15 | 2016-01-13 | 安徽问天量子科技股份有限公司 | Accurate temperature control device of infrared single -photon detector |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111258351A (en) * | 2020-03-17 | 2020-06-09 | 国开启科量子技术(北京)有限公司 | Single photon detector TEC temperature control method and device |
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| CN105223982B (en) | 2017-08-29 |
| CN104750138A (en) | 2015-07-01 |
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Address after: 241003 No. 12, Zhanghe Road, hi tech Zone, Anhui, Wuhu Applicant after: Anhui Asky Quantum Technology Co., Ltd. Address before: 241002 Anhui science and technology innovation public service center, Wuhu national hi tech Zone, Yijiang Applicant before: Anhui Asky Quantum Technology Co., Ltd. |
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