CN207992837U - A kind of infrared focal plane array TEC temperature control circuits, infrared movement and infrared seeker - Google Patents
A kind of infrared focal plane array TEC temperature control circuits, infrared movement and infrared seeker Download PDFInfo
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- CN207992837U CN207992837U CN201721886037.4U CN201721886037U CN207992837U CN 207992837 U CN207992837 U CN 207992837U CN 201721886037 U CN201721886037 U CN 201721886037U CN 207992837 U CN207992837 U CN 207992837U
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Abstract
The utility model is related to a kind of infrared focal plane array TEC temperature control circuits, infrared movement and infrared seeker, infrared focal plane array TEC temperature control circuits are improved, simplify temperature control circuit structure, the temperature control circuit specifically includes TEC modules, TEC current control circuits and current detection circuit, effective control can be made to TEC module temperature-regulated conditions, the operating temperature of infrared focal plane array is stablized in a suitable section, infrared focal plane array image quality caused by operating temperature is well prevented to decline, improve the yield rate of development and the production of infrared imaging device, reliability and stability, significantly improve the image quality of infrared focal plane array, obtain good economic benefit.
Description
Technical field
The utility model is related to a kind of infrared focal plane array TEC temperature control circuits, infrared movement and infrared seekers, belong to
Video, technical field of image processing.
Background technology
Infrared imagery technique purposes is wide, the technology of great development prospect.In nature, the object of all can all emit red
Outside line, and albedo is different.Therefore it can be obtained not by the infrared ray difference between target and background using detector measurement
With infrared image of the target under different background.
Infrared imagery technique is with the obvious advantage in nighttime imaging field due to the technical characterstic of itself.Currently, being filled in weapon
Standby aspect is widely used, and greatly enhances fight capability of the weapon under night and other extreme or adverse circumstances.With depth
Remote research significance.In other respects, infrared imagery technique is widely used in quality testing and monitoring field, including sylvosteppe
Fire alarm, artistic work authenticity, industrial equipment hidden troubles removing, cancer, vein occlusion etc. early diagnose, operation detects,
The detection etc. of warm wear.
Divide refrigeration mode and non-refrigeration type two types, the wherein pass of non-refrigeration type infrared guiding device in infrared imagery technique
Key device is infrared focal plane array.Photosensitive element in infrared focal plane array is extremely sensitive to temperature, in normal use
The temperature of focal plane arrays (FPA) is increased with the increase of working time, and the ability to work of photosensitive element also decreases, and makes image mould
Paste unclear, information distortion.Therefore, TEC modules are all integrated in non-refrigeration type infrared focal plane array, need to design matching
TEC temperature control circuits make its normal work, ensure that focal plane operating temperature is stablized in a suitable section；But often at present
The TEC temperature control circuits common configuration seen is complicated, and with high costs, performance redundancy occupies a large amount of software resources, influence temperature control speed and
Accuracy is serious to hinder non-refrigeration type infrared guiding device miniaturization process；Therefore need special design a kind of infrared burnt flat
Face array TEC temperature control circuits solve problem above.
Utility model content
The purpose of the utility model is to overcome the drawbacks described above of the prior art, provide a kind of infrared focal plane array TEC
Temperature control circuit, by the control to TEC modules, by the actual temperature stability contorting of infrared focal plane array setting work temperature
It spends in section, solves infrared focal plane array due to image-quality problems caused by temperature, significantly improve infrared focus plane
The image quality of array.
Another of the utility model is designed to provide a kind of infrared movement including above-mentioned TEC temperature control circuits.
Another of the utility model is designed to provide a kind of infrared seeker including above-mentioned infrared movement.
What the above-mentioned purpose of the utility model was mainly achieved by following technical solution：
A kind of infrared focal plane array TEC temperature control circuits, including TEC modules, TEC current control circuits and current detecting electricity
Road, the TEC modules are connect with TEC current control circuits and current detection circuit respectively, and TEC current control circuits are examined with electric current
Slowdown monitoring circuit connects, wherein：
TEC modules：The temperature signal of acquisition infrared focal plane array in real time, and it is sent to current detection circuit；Receive TEC
The temperature control signals that current control circuit is sent, according to the temperature control signals, by the temperature control of infrared focal plane array
System is within the temperature range of setting；
Current detection circuit：The temperature signal for the infrared focal plane array that real-time reception TEC modules are sent, by the temperature
Signal is converted to voltage signal by current signal, and the voltage signal is converted to digital signal by analog signal, is sent to
TEC current control circuits；
TEC current control circuits：The digital voltage signal that real-time reception current detection circuit is sent, by the digital voltage
Signal is compared with the threshold value of setting, if the threshold value beyond setting, disconnects TEC current control circuits, if without departing from
The digital voltage signal is then compared by the threshold value of setting with the temperature range of setting, if not in the temperature model of setting
In enclosing, then outside output temperature controls signal, if within the temperature range of setting, not outside output temperature controls signal.
In above-mentioned infrared focal plane array TEC temperature control circuits, the TEC current control circuits include PMOS tube Q1, electricity
R1, inductance L1 and main control chip SOC are hindered, wherein one end resistance R1 connects main control chip SOC, and the other end connects the grid of PMOS tube Q1
The source electrode of pole, one end of the drain electrode connection inductance L1 of PMOS tube Q1, PMOS tube Q1 connects power supply, the other end connection electricity of inductance L1
Capacitance C1 in current detection circuit.
In above-mentioned infrared focal plane array TEC temperature control circuits, when the digital voltage signal beyond setting threshold value,
Then main control chip SOC controls PMOS tube Q1 and disconnects.
In above-mentioned infrared focal plane array TEC temperature control circuits, the current detection circuit include capacitance C1, resistance R0,
One end of operational amplifier U2 and analog-to-digital conversion ADC, wherein capacitance C1 are grounded, and the other end is separately connected resistance R0 and TEC electric currents
Two input terminals of the inductance L1 of control circuit, operational amplifier U2 are connected to the both ends resistance R0, the output of operational amplifier U2
End is connect with analog-to-digital conversion ADC.
In above-mentioned infrared focal plane array TEC temperature control circuits, the analog-to-digital conversion ADC in the current detection circuit is integrated
On the main control chip SOC of TEC current control circuits.
In above-mentioned infrared focal plane array TEC temperature control circuits, the TEC current control circuits real-time reception current detecting
The digital voltage signal that circuit is sent obtains temperature control signals by carrying out PID arithmetic on main control chip SOC.
In above-mentioned infrared focal plane array TEC temperature control circuits, the model GWIR 02 of the infrared focal plane array
03X1A；The model IRF4905 of the PMOS tube.
In above-mentioned infrared focal plane array TEC temperature control circuits, the XC7Z030- of the model XLINX of the main control chip
2FBG484I。
A kind of infrared movement, including above-mentioned infrared focal plane array TEC temperature control circuits.
A kind of infrared seeker, including above-mentioned infrared movement.
The utility model has the advantages that compared with prior art：
(1), the utility model improves infrared focal plane array TEC temperature control circuits, simplifies temperature control circuit knot
Structure, the temperature control circuit specifically include TEC modules, TEC current control circuits and current detection circuit, can be to TEC module temperature controls
State makes effective control, and the operating temperature of focal plane is stablized in a suitable section, is well prevented infrared
Focal plane arrays (FPA) caused by operating temperature image quality decline, improve infrared imaging device development and production at
Product rate, reliability and stability significantly improve the image quality of infrared focal plane array, obtain good economic benefit；
(2), main control chip mainly provides place to PID arithmetic in the utility model temperature control circuit, is exported by PID arithmetic
Signal is controlled, dynamic adjusts the working condition of TEC modules, and the actual temperature value that focal plane exports is made to be intended to set in main control chip
The appropriate working temperature value set；Current detection circuit is for preventing temperature control circuit is out of control from causing output current is larger to cause burnt put down
Surface damage places detection resistance acquisition real-time current information by TEC modules, and is transferred to main control chip by amplifier, works as electricity
When flowing through big, main control chip output control signal disconnects rapidly PMOS tube, effective protection focal plane arrays (FPA).
(3), the utility model temperature control circuit simplification has been carried out to circuit structure, higher, the profit that reduces cost, operability
In device miniaturization.
Description of the drawings
Fig. 1 is the composition frame chart of the utility model infrared focal plane array TEC temperature control circuits；
Fig. 2 is the concrete structure composition figure of the utility model infrared focal plane array TEC temperature control circuits.
Specific implementation mode
The utility model is described in further detail in the following with reference to the drawings and specific embodiments：
It is the composition frame chart of the utility model infrared focal plane array TEC temperature control circuits as shown in Figure 1, Fig. 2 show this
The concrete structure composition figure of utility model infrared focal plane array TEC temperature control circuits, as seen from the figure, the utility model is infrared burnt flat
Face array TEC temperature control circuits include TEC modules, TEC current control circuits and current detection circuit, wherein TEC modules respectively with
TEC current control circuits are connected with current detection circuit, and TEC current control circuits are connect with current detection circuit.
TEC modules acquire the temperature signal of infrared focal plane array in real time, and are sent to current detection circuit；Receive TEC
The temperature control signals that current control circuit is sent control the temperature of infrared focal plane array according to the temperature control signals
Within the temperature range of setting.TEC, that is, semiconductor cooler be using made of peltier effect, when by size of current side
To it is different when, present cooling and warming different-effect semiconductor devices.
The temperature signal for the infrared focal plane array that current detection circuit real-time reception TEC modules are sent, which is believed
Number voltage signal is converted to by current signal, which is converted into digital signal by analog signal, and is sent to TEC electricity
Flow control circuit.
As shown in Fig. 2, current detection circuit includes capacitance C1, resistance R0, operational amplifier U2 and analog-to-digital conversion ADC,
One end of middle capacitance C1 is grounded, and the other end is separately connected the inductance L1 of resistance R0 and TEC current control circuits, operational amplifier U2
Two input terminals be separately connected the both ends of resistance R0, be connected in parallel with resistance R0 formation, the output end of operational amplifier U2 with
Analog-to-digital conversion ADC connections.ADC in current detection circuit is integrated on the main control chip SOC of TEC current control circuits.
The major function of TEC current control circuits is the electric current that control flows through TEC modules both ends, by a PMOS tube and filter
Wave circuit serves as main functional circuit, and due to the switching characteristic of PMOS tube, current control circuit can be according to control signal not
Together and in equal different conditions are turned on and off, when PMOS is opened, TEC refrigeration, when PMOS is turned off, TEC does not work；
The digital voltage signal that TEC current control circuit real-time reception current detection circuits are sent, which is believed
It number is compared with the threshold value of setting, if threshold value of the digital voltage signal beyond setting, disconnects TEC current controls electricity
Road, if the digital voltage signal carries out the digital voltage signal and the temperature range of setting without departing from the threshold value of setting
Compare, if the digital voltage signal, not within the temperature range of setting, outside output temperature controls signal, if the digital voltage
For signal within the temperature range of setting, then not outside output temperature controls signal.
As shown in Fig. 2, TEC current control circuits include PMOS tube Q1, resistance R1, inductance L1 and main control chip SOC, wherein
The one end resistance R1 connects main control chip SOC, and the other end connects the grid of PMOS tube Q1, the drain electrode connection inductance L1's of PMOS tube Q1
The source electrode of one end, PMOS tube Q1 connects power supply, the capacitance C1 in the other end connection current detection circuit of inductance L1.
When threshold value of the digital voltage signal beyond setting, then main control chip control PMOS tube Q1 disconnections.TEC current controls
The digital voltage signal that circuit real-time reception current detection circuit is sent, by carrying out PID arithmetic acquisition on main control chip SOC
Temperature control signals.
Actual temperature data is input in main control chip SOC by infrared focal plane array when working, actual temperature and master control
Pre-set setting value is compared in chip SOC, by PID arithmetic, control signal is exported and gives TEC current control electricity
Road.
When infrared focal plane array actual temperature is higher than set temperature, main control chip SOC output control signals, TEC electricity
PMOS tube Q1 is open-minded on flow control circuit, and electric current is flowed through from TEC, and TEC is in refrigerating state, and focal plane actual temperature declines, becomes
It is bordering on set temperature value；
When infrared focal plane array actual temperature is equal to set temperature, PMOS tube keeps current state, until equilibrium-like
State is broken；
When infrared focal plane array actual temperature is less than set temperature value, the PMOS tube Q1 on TEC current control circuits
It is off state, no current flows through TEC modules, and TEC does not work；Since focal plane oneself power consumption value is 350mW, when its work
When, itself just will produce considerable heat, be combined with other device heatings in device, and actual temperature is made to keep being slightly below setting value
And slowly rise.
Temperature control circuit output current out of control is larger in order to prevent causes focal plane to damage, and devises current detection circuit,
Detection resistance is placed by TEC and acquires real-time current information, and main control chip SOC is transferred to by amplifier, it is when current is excessive, main
Chip SOC output control signals are controlled, PMOS tube is disconnected rapidly, protects focal plane arrays (FPA).
Effects of the main control chip SOC in temperature control circuit mainly provides place to PID arithmetic, selects suitable ratio control
System, differential control, integration control parameter export control signal by PID arithmetic, and dynamic adjusts TEC working conditions, and according to reality
Border situation converts the value of three parameters, and the actual temperature value of focal plane output is controlled the suitable work set in main control chip
In the temperature range of work.Pid algorithm only carries out refrigeration operation, and infrared focal plane array heats up by oneself power consumption.
The utility model further relates to a kind of infrared movement, using above-mentioned infrared focal plane array TEC temperature control circuits.
The utility model further relates to a kind of infrared seeker, using above-mentioned infrared movement.
Embodiment 1
As shown in Fig. 2, the utility model proposes a kind of infrared focal plane array TEC temperature control circuits in infrared focus plane battle array
Column selection 02 03X1A of GWIR；PMOS tube selects IRF4905；Main control chip selects the XC7Z030-2FBG484I of XLINX.
The utility model unspecified part belongs to common sense well known to those skilled in the art.
Claims (10)
1. a kind of infrared focal plane array TEC temperature control circuits, it is characterised in that：Including TEC modules, TEC current control circuits and
Current detection circuit, the TEC modules are connect with TEC current control circuits and current detection circuit respectively, TEC current control electricity
Road is connect with current detection circuit, wherein：
TEC modules：The temperature signal of acquisition infrared focal plane array in real time, and it is sent to current detection circuit；Receive TEC electric currents
The temperature control signals that control circuit is sent exist the temperature control of infrared focal plane array according to the temperature control signals
Within the temperature range of setting；
Current detection circuit：The temperature signal for the infrared focal plane array that real-time reception TEC modules are sent, by the temperature signal
Voltage signal is converted to by current signal, and the voltage signal is converted into digital signal by analog signal, is sent to TEC electricity
Flow control circuit；
TEC current control circuits：The digital voltage signal that real-time reception current detection circuit is sent, by the digital voltage signal
It is compared with the threshold value of setting, if the threshold value beyond setting, disconnects TEC current control circuits, if without departing from setting
Threshold value, then the digital voltage signal is compared with the temperature range of setting, if not within the temperature range of setting,
Then outside output temperature controls signal, if within the temperature range of setting, not outside output temperature controls signal.
2. infrared focal plane array TEC temperature control circuits according to claim 1, it is characterised in that：The TEC current controls
Circuit includes PMOS tube Q1, resistance R1, inductance L1 and main control chip SOC, and wherein one end resistance R1 connects main control chip SOC, separately
One end connects the grid of PMOS tube Q1, one end of the drain electrode connection inductance L1 of PMOS tube Q1, and the source electrode of PMOS tube Q1 connects power supply,
Capacitance C1 in the other end connection current detection circuit of inductance L1.
3. infrared focal plane array TEC temperature control circuits according to claim 2, it is characterised in that：When the digital voltage
Threshold value of the signal beyond setting, then main control chip SOC control PMOS tube Q1 disconnections.
4. infrared focal plane array TEC temperature control circuits according to claim 1, it is characterised in that：The current detecting electricity
Road includes capacitance C1, resistance R0, operational amplifier U2 and analog-to-digital conversion ADC, one end ground connection of wherein capacitance C1, other end difference
The inductance L1 of resistance R0 and TEC current control circuits are connected, two input terminals of operational amplifier U2 are connected to the both ends resistance R0,
The output end of operational amplifier U2 is connect with analog-to-digital conversion ADC.
5. the infrared focal plane array TEC temperature control circuits according to one of Claims 1 to 4, it is characterised in that：The electric current
Analog-to-digital conversion ADC in detection circuit is integrated on the main control chip SOC of TEC current control circuits.
6. the infrared focal plane array TEC temperature control circuits according to one of Claims 1 to 4, it is characterised in that：The TEC
The digital voltage signal that current control circuit real-time reception current detection circuit is sent, by carrying out PID on main control chip SOC
Operation obtains temperature control signals.
7. infrared focal plane array TEC temperature control circuits according to claim 2 or 3, it is characterised in that：It is described infrared burnt flat
02 03 X1A of model GWIR of face array；The model IRF4905 of the PMOS tube.
8. infrared focal plane array TEC temperature control circuits according to claim 2 or 3, it is characterised in that：The main control chip
Model XLINX XC7Z030-2FBG484I.
9. a kind of infrared movement, it is characterised in that：Including the infrared focal plane array TEC temperature controls described in one of claim 1~8
Circuit.
10. a kind of infrared seeker, it is characterised in that：Including the infrared movement described in claim 9.
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| CN201721886037.4U CN207992837U (en) | 2017-12-28 | 2017-12-28 | A kind of infrared focal plane array TEC temperature control circuits, infrared movement and infrared seeker |
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| CN201721886037.4U CN207992837U (en) | 2017-12-28 | 2017-12-28 | A kind of infrared focal plane array TEC temperature control circuits, infrared movement and infrared seeker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679704A (en) * | 2020-08-11 | 2020-09-18 | 北京富吉瑞光电科技股份有限公司 | Temperature control device and temperature control method based on TEC |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679704A (en) * | 2020-08-11 | 2020-09-18 | 北京富吉瑞光电科技股份有限公司 | Temperature control device and temperature control method based on TEC |
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