CN109405978A - A kind of infrared machine core of refrigeration mode and preparation method thereof - Google Patents
A kind of infrared machine core of refrigeration mode and preparation method thereof Download PDFInfo
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- CN109405978A CN109405978A CN201811435078.0A CN201811435078A CN109405978A CN 109405978 A CN109405978 A CN 109405978A CN 201811435078 A CN201811435078 A CN 201811435078A CN 109405978 A CN109405978 A CN 109405978A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/04—Casings
- G01J5/041—Mountings in enclosures or in a particular environment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0265—Handheld, portable
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/33—Transforming infrared radiation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
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- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The present invention provides infrared machine core of a kind of refrigeration mode and preparation method thereof, solve the problems, such as that poor refrigerating efficiency present in the prior art, machine core volume be larger, heavier mass.The infrared machine core of the refrigeration mode includes machine core shell and refrigeration type infrared detector, detector circuit plate, the first heat-conducting plate, second level TEC thermoelectric cooler, the second heat-conducting plate, TEC drive circuit board, detector drive circuit board, image processing circuit plate and interface conversion circuit board positioned at machine core enclosure interior.The side of first heat-conducting plate is connected with the outer casing bottom of refrigeration type infrared detector, and the other side is connected with the cold end of second level TEC thermoelectric cooler；The hot end of second level TEC thermoelectric cooler is connected with the side of the second heat-conducting plate；Second heat-conducting plate is connected with the machine core shell；TEC drive circuit board, detector drive circuit board, image processing circuit plate and interface conversion circuit board are sequentially arranged at from top to bottom in the cavity below the second heat-conducting plate；Second level TEC thermoelectric cooler is connected with TEC drive circuit board.
Description
Technical field
The invention belongs to refrigeration mode infrared imagery techniques, and in particular to a kind of infrared machine core of refrigeration mode and preparation method thereof.
Background technique
It is existing that infrared machine core is just developing towards the directions such as miniaturization, round-the-clock, remote, high-resolution, high-performance, low-power consumption
There is the infrared machine core of refrigeration mode generally to use level-one TEC thermoelectric cooler, but refrigeration effect is poor, is unable to satisfy given requirements, or
It is refrigeration effect to be reached using Dewar bottle structure, however this structural volume is larger, heavier mass, not readily portable transport.
Summary of the invention
It is an object of the invention to solve, poor refrigerating efficiency present in the prior art, machine core volume be larger, heavier mass
Shortcoming, and provide a kind of infrared machine core of refrigeration mode and preparation method thereof.
To achieve the above object, technical solution provided by the present invention is:
A kind of infrared machine core of refrigeration mode, is characterized in that, including machine core shell and positioned at machine core enclosure interior
Refrigeration type infrared detector, detector circuit plate, the first heat-conducting plate, second level TEC thermoelectric cooler, the second heat-conducting plate, TEC driving
Circuit board, detector drive circuit board, image processing circuit plate and interface conversion circuit board；The refrigeration type infrared detector is solid
It is scheduled on detector circuit plate comprising infrared window, infrared focus plane, temperature sensor and level-one TEC thermoelectric cooler；Institute
The side for stating the first heat-conducting plate is connected with the outer casing bottom of refrigeration type infrared detector, the other side and second level TEC thermoelectric cooler
Cold end be connected；The hot end of the second level TEC thermoelectric cooler is connected with the side of the second heat-conducting plate；Second heat-conducting plate with
The machine core shell is connected；The TEC drive circuit board, detector drive circuit board, image processing circuit plate and interface conversion
Circuit board is sequentially arranged at from top to bottom in the cavity below the second heat-conducting plate；The temperature signal of the temperature sensor output,
Level-one TEC thermoelectric cooler and second level TEC thermoelectric cooler are electrically connected with TEC drive circuit board.
Further, heat-conductive assembly is provided with above described image processing circuit plate, the heat-conductive assembly is to be fixed on machine
Transverse slat on core shell body.
Further, for increasing heat radiation area, be conducive to the heat dissipation of electronic component in machine core shell body, the machine core shell
The side of body uses heat radiating fin structure.
Further, in order to prevent the temperature in second level TEC thermoelectric cooler hot end influenced by radiation mode it is infrared burnt flat
Face is filled with heat-barrier material between second heat-conducting plate and the shell of refrigeration type infrared detector.
Further, second heat-conducting plate and machine core shell are integrated setting.
Further, using bolt from machine core shell body bottom sequentially pass through interface conversion circuit board, image processing circuit plate,
Detector drive circuit board and TEC drive circuit board, and the bolt is fixed on second heat-conducting plate, in order to prevent respectively
The heat diffusion of circuit board adds collet on the bolt.
Further, the refrigeration type infrared detector is welded on detector circuit plate, the detector circuit plate
Bottom end is fixed on the first heat-conducting plate, and first heat-conducting plate is connected by card slot with the cold end of second level TEC thermoelectric cooler.
Further, the thermally conductive copper billet that first heat-conducting plate and the second heat-conducting plate select thermal resistance to be lower than 2.5K/W.
Further, the size of first heat-conducting plate is 33mm × 43mm, and the size of second heat-conducting plate is 65mm
×65mm。
The present invention also provides the production methods of the infrared machine core of above-mentioned refrigeration mode, are characterized in that, including following step
It is rapid:
The side of machine core shell is fabricated to heat radiating fin structure by step 1), the design of machine core enclosure interior have the second heat-conducting plate and
Transverse slat is conducive to radiate, to guarantee that machine core reliably works under the conditions of requiring temperature；
Refrigeration type infrared detector is placed in the intracorporal upper end of machine core shell by step 2), and is welded on detector circuit plate；
The bottom of refrigeration type infrared detector is fixed on the center of the first heat-conducting plate side by step 3), by the first heat-conducting plate
The other side be connected with the cold end of second level TEC thermoelectric cooler；By the hot end of second level TEC thermoelectric cooler and and machine core shell one
Second heat-conducting plate of body setting is connected；And the filling with insulation material between the second heat-conducting plate and refrigeration type infrared detector, that is, the
Equal filling with insulation material in space above two heat-conducting plates；
Step 3) is turned TEC drive circuit board, detector drive circuit board, image processing circuit plate and interface using bolt
Changing circuit board, successively interval is mounted on the lower section of the second heat-conducting plate from top to bottom, and make transverse slat be located at detector drive circuit board with
Between image processing circuit plate, i.e. the transverse slat top that is located exactly at image processing circuit plate generates image processing circuit plate
Heat transfer gives machine core shell；
Temperature signal, level-one TEC thermoelectric cooler and the second level TEC thermoelectric cooler that step 4) exports temperature sensor
On common access TEC drive circuit board, realize two-stage TEC control strategy, improve the infrared machine core temperature of refrigeration mode stability and
Functional reliability.
The invention has the advantages that
1, the present invention uses second level TEC thermoelectric cooling method, significantly enhances the refrigeration effect of the infrared machine core of refrigeration mode,
Detection sensitivity and service life are improved, use scope is expanded, enriches use occasion, while being infrared inside machine core
Detector provides effective heat dissipation path, reduces requirement of the refrigeration type infrared detector to environment temperature；And it is of the invention
The infrared machine core of refrigeration mode changes less transport easy to carry in volume and quality.
2, the present invention can use level-one TEC thermoelectric cooler, second level TEC thermoelectric cooler in each temperature range different
TEC control strategy, optimize control, realize low-power consumption, steady operation in wide the temperature difference range, this refrigeration mode infrared machine
Cored structure improves the stability and reliability of machine core temperature, greatly improves the image quality of the infrared machine core of refrigeration mode.
3, the present invention uses the machine core shell of heat radiating fin structure, sufficiently increases heat dissipation area, is more conducive to electronics member
The heat dissipation of device.
4. the second heat-conducting plate of the invention and machine core shell are integrated setting, each circuit board is fixed on the by bolt
The lower section of two heat-conducting plates, while detector circuit plate being pressed on the first heat-conducting plate, keep entire infrared cassette mechanism structure firm, fortune
It is capable not influenced by external force, it is relatively stable.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the infrared machine core of refrigeration mode of the present invention；
Fig. 2 is the structural schematic diagram of the infrared machine core machine core shell body of refrigeration mode of the present invention；
Fig. 3 is the infrared machine core list temperature spot TEC power consumption profile (T=20 DEG C) of refrigeration mode of the present invention；
Appended drawing reference is as follows:
1- refrigeration type infrared detector；101- infrared focus plane；102- level-one TEC thermoelectric cooler；103- shell；2-
One heat-conducting plate；3- second level TEC thermoelectric cooler；4- detector drive circuit board；5- image processing circuit plate；6- machine core shell；
7- interface conversion circuit board；8-TEC drive circuit board；The second heat-conducting plate of 9-；10- heat-barrier material；11- detector circuit plate；12-
Transverse slat；13- bolt.
Specific embodiment
The contents of the present invention are described in further detail below in conjunction with the drawings and specific embodiments:
Only for convenience, in the following description, specific direction term has been used, has been with corresponding attached drawing
For reference, it can not be considered limitation of the present invention, when the definition direction of drawing changes, what these words indicated
Direction should be construed as corresponding different directions.
As shown in Figure 1 to Figure 2, the infrared machine core of a kind of refrigeration mode, including machine core shell 6 and be located at machine core shell 6 inside
Refrigeration type infrared detector 1, detector circuit version 11, the first heat-conducting plate 2, second level TEC thermoelectric cooler 3, the second heat-conducting plate
9, TEC drive circuit board 8, detector drive circuit board 4, image processing circuit plate 5 and interface conversion circuit board 7.
Wherein, refrigeration type infrared detector 1 is located at machine core shell 6, is welded in detector circuit version 11 comprising red
Outer window, infrared focus plane 101, temperature sensor and level-one TEC thermoelectric cooler；It is red inside refrigeration type infrared detector 1
Outer temperature controlling chip and infrared power supply chip are respectively welded at the top layer and bottom of detector circuit version 11, and detector circuit version 11 is used
In temperature collection.
The side of first heat-conducting plate 2 is connected with 103 bottom of shell of refrigeration type infrared detector 1, detector circuit version 11
Bottom end be pressed on the first heat-conducting plate 2, the other side of the first heat-conducting plate 2 is cold by card slot and second level TEC thermoelectric cooler 3
End is connected；The hot end of second level TEC thermoelectric cooler 3 is connected with the upper surface of the second heat-conducting plate 9；The circumferential direction of second heat-conducting plate 9 with
Machine core shell 6 is wholely set that (i.e. the second heat-conducting plate 9 constitutes a part of machine core shell 6, heat can be directly passed to machine core
Shell 6)；TEC drive circuit board 8, detector drive circuit board 4, image processing circuit plate 5 and interface conversion circuit board 7 are from upper
And lower interval setting (being conducive to gas flowing), and (bolt passes through heat-insulated processing, adds thereon heat-insulated by bolt 13
Set) it is fixed between 6 bottom of the second heat-conducting plate 9 and machine core shell, it is that entire cassette mechanism structure is stablized.The temperature of temperature sensor output
It spends signal, level-one TEC thermoelectric cooler 102 and second level TEC thermoelectric cooler 3 and TEC drive circuit board 8 and drives electricity with TEC
Road plate 8 is connected.
It is provided with heat-conductive assembly above image processing circuit plate, which is the cross being fixed on machine core shell 6
(transverse slat 12 is also a part of machine core shell 6 to plate 12, and the heat transfer that can generate image processing circuit plate 5 gives machine core shell
6, help to radiate).The temperature in 3 hot end of second level TEC thermoelectric cooler influences infrared focus plane by radiation mode in order to prevent
101, it is filled with heat-barrier material 10 between the second heat-conducting plate 9 and the shell of refrigeration type infrared detector 1, reduces machine core shell 6
The temperature of infrared detector focal plane is influenced.For increasing heat radiation area, be conducive to the heat dissipation of electronic component, guarantee machine core
It reliably works under the conditions of requiring temperature, the side of the machine core shell 6 uses heat radiating fin structure.
The thermally conductive copper billet that above-mentioned first heat-conducting plate 2 and the second heat-conducting plate 9 select thermal resistance to be lower than 2.5K/W；Wherein, first
The size of heat-conducting plate 2 is 33mm × 43mm, and the size of the second heat-conducting plate 9 is 65mm × 65mm.
When the infrared machine core of refrigeration mode constant circumstance temperature (such as 55 DEG C) work when, due in detector and image procossing electricity
On the plate of road there are high power consumption electric elements to exist, therefore the intracorporal heat of chamber is caused sharply to increase, the intracorporal temperature of chamber constantly rises
It is high.The level-one TEC thermoelectric cooler 102 being integrated in refrigeration type infrared detector 1, by its in refrigeration type infrared detector 1
The temperature signal of the infrared temperature sensor output in portion is accessed jointly in 8 circuit of TEC drive circuit board, is realized infrared to refrigeration mode
The refrigeration of detector 1 guarantees that refrigeration type infrared detector 1 works at an established temperature.Meanwhile being tightly attached to detector circuit version
The first heat-conducting plate 2 under 11 is first heat sink, heat is transported to second level TEC thermoelectric cooler 3, most afterwards through the second heat-conducting plate 9
I.e. second is heat sink, is transmitted on the infrared machine core machine core shell body 6 of refrigeration mode, and the meeting of the machine core shell 6 with heat radiating fin structure will be hot
Amount is discharged in air, to guarantee the normal working performance of entire machine core；The heat that image processing circuit plate 5 generates passes through heat
Radiation mode passes to the transverse slat 12 above it, and then is transmitted on machine core shell 6.In general, the infrared machine core of refrigeration mode is from knot
Structure is designed into inner cavity layout, all guarantees its normal working performance.
Fig. 3 is the infrared machine core list temperature spot TEC power consumption profile (T=20 DEG C) of refrigeration mode of the present invention, it can be seen from the figure that
When environment temperature is 20 DEG C, the working performance of TEC, different focal planes temperature correspond to different detector operating voltages and electric current, can
Theoretical foundation is provided as control detector.
The production method of the above-mentioned infrared machine core of refrigeration mode, comprising the following steps:
The side of machine core shell 6 is fabricated to heat radiating fin structure by step 1), and 6 interior design of machine core shell has the second heat-conducting plate
9 and transverse slat 12, be conducive to radiate, to guarantee that machine core reliably works under the conditions of requiring temperature；
Refrigeration type infrared detector 1 is placed in the upper end in machine core shell 6 by step 2), and is welded on detector circuit plate
On；
The bottom of refrigeration type infrared detector 1 is fixed on the center of 2 side of the first heat-conducting plate by step 3), thermally conductive by first
The other side of plate 2 is connected with the cold end of second level TEC thermoelectric cooler 3；By the hot end of second level TEC thermoelectric cooler 3 and and machine core
The second heat-conducting plate 9 that shell 6 is wholely set is connected；And it is stuffed heat insulated between the second heat-conducting plate 9 and refrigeration type infrared detector 1
Material 10；
Step 4) by TEC drive circuit board 8, detector drive circuit board 4, image processing circuit plate 5 and is connect using bolt
Successively interval is mounted on the lower section of the second heat-conducting plate 9 to mouth conversion circuit plate 7 from top to bottom, and transverse slat 12 is made to be located at detector driving
Between circuit board 4 and image processing circuit plate 5, i.e. the top that is located exactly at image processing circuit plate 5 of transverse slat 12, by image procossing
The heat transfer that circuit board 5 generates is to machine core shell 6；
Temperature signal, level-one TEC thermoelectric cooler 102 and the second level TEC thermoelectricity system that step 5) exports temperature sensor
Cooler 3 on access TEC drive circuit board 8, realizes two-stage TEC control strategy jointly, may be selected to use different controls to two-stage TEC
System strategy, for example, actual condition needs to reduce by 55 DEG C, then optional give the demand assignment to every level-one TEC thermoelectric cooler,
Such as control level-one TEC thermoelectric cooler reduces by 20 DEG C, second level TEC thermoelectric cooler reduces by 35 DEG C, meets operating condition need with this
It wants；Although TEC itself work also give off heat, in this case, TEC itself bring heat it is not only less but also
It is able to satisfy cooling demand；Therefore, different cooling demands may be selected to be assigned to every level-one TEC thermoelectric cooler, is mentioned with this
The stability and functional reliability of the high infrared machine core temperature of refrigeration mode.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art can readily occur in various equivalent modifications or replace in technical scope disclosed by the invention
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of infrared machine core of refrigeration mode, it is characterised in that: including machine core shell (6) and positioned at the refrigeration of machine core enclosure interior
It is type infrared detector (1), detector circuit plate (11), the first heat-conducting plate (2), second level TEC thermoelectric cooler (3), second thermally conductive
Plate (9), TEC drive circuit board (8), detector drive circuit board (4), image processing circuit plate (5) and interface conversion circuit
Plate (7)；
The refrigeration type infrared detector (1) is fixed on detector circuit plate (11) comprising infrared window, infrared focus plane
(101), temperature sensor and level-one TEC thermoelectric cooler；
The side of first heat-conducting plate (2) is connected with shell (103) bottom of refrigeration type infrared detector (1), the other side with
The cold end of second level TEC thermoelectric cooler (3) is connected；The hot end and the second heat-conducting plate (9) of the second level TEC thermoelectric cooler (3)
Side be connected；Second heat-conducting plate (9) is connected with the machine core shell (6)；
The TEC drive circuit board (8), detector drive circuit board (4), image processing circuit plate (5) and interface conversion circuit
Plate (7) is successively set on from top to bottom in the cavity below the second heat-conducting plate (9)；
Temperature signal, level-one TEC thermoelectric cooler (102) and the second level TEC thermoelectric cooler (3) of the temperature sensor output
It is electrically connected with TEC drive circuit board (8).
2. the infrared machine core of a kind of refrigeration mode according to claim 1, it is characterised in that: above described image processing circuit plate
It is provided with heat-conductive assembly, the heat-conductive assembly is the transverse slat (12) being fixed on machine core shell (6).
3. the infrared machine core of a kind of refrigeration mode according to claim 2, it is characterised in that: the side of the machine core shell (6)
Using heat radiating fin structure.
4. the infrared machine core of a kind of refrigeration mode according to claim 3, it is characterised in that: second heat-conducting plate (9) and system
Heat-barrier material (10) are filled between the shell (103) of cold mould infrared detector (1).
5. the infrared machine core of a kind of refrigeration mode according to claim 1 to 4, it is characterised in that: second heat-conducting plate
(9) setting is integrated with machine core shell (6).
6. the infrared machine core of a kind of refrigeration mode according to claim 5, it is characterised in that: use bolt (13) from machine core shell body
(6) bottom sequentially passes through interface conversion circuit board (7), image processing circuit plate (5), detector drive circuit board (4) and TEC and drives
Dynamic circuit board (8), and the bolt (13) is fixed on second heat-conducting plate (9).
7. the infrared machine core of a kind of refrigeration mode according to claim 6, it is characterised in that: the refrigeration type infrared detector
(1) it being welded on detector circuit plate (11), the bottom end of the detector circuit plate (11) is fixed on the first heat-conducting plate (2),
First heat-conducting plate (2) is connected by card slot with the cold end of second level TEC thermoelectric cooler (3).
8. the infrared machine core of a kind of refrigeration mode according to claim 7, it is characterised in that: first heat-conducting plate (2) and
The thermally conductive copper billet that two heat-conducting plates (9) select thermal resistance to be lower than 2.5K/W.
9. the infrared machine core of a kind of refrigeration mode according to claim 8, it is characterised in that: the ruler of first heat-conducting plate (2)
Very little is 33mm × 43mm, and the size of second heat-conducting plate (9) is 65mm × 65mm.
10. a kind of production method of any infrared machine core of refrigeration mode of claim 1-9, which is characterized in that including following step
It is rapid:
The side of machine core shell is fabricated to heat radiating fin structure by step 1), and the design of machine core enclosure interior has the second heat-conducting plate and cross
Plate；
Refrigeration type infrared detector is placed in the intracorporal upper end of machine core shell by step 2), and is welded on detector circuit plate；
The bottom of refrigeration type infrared detector is fixed on the center of the first heat-conducting plate side by step 3), by the another of the first heat-conducting plate
Side is connected with the cold end of second level TEC thermoelectric cooler；By the hot end of second level TEC thermoelectric cooler with and machine core shell integrally set
The second heat-conducting plate set is connected；And the filling with insulation material between the second heat-conducting plate and refrigeration type infrared detector；
Step 4) is electric by TEC drive circuit board, detector drive circuit board, image processing circuit plate and interface conversion using bolt
Successively interval is mounted on the lower section of the second heat-conducting plate to road plate from top to bottom, and transverse slat is made to be located at detector drive circuit board and image
Between processing circuit plate；
Temperature signal, level-one TEC thermoelectric cooler and the second level TEC thermoelectric cooler that step 5) exports temperature sensor are common
It accesses on TEC drive circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435078.0A CN109405978A (en) | 2018-11-28 | 2018-11-28 | A kind of infrared machine core of refrigeration mode and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811435078.0A CN109405978A (en) | 2018-11-28 | 2018-11-28 | A kind of infrared machine core of refrigeration mode and preparation method thereof |
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Family
ID=65456067
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112015030A (en) * | 2020-08-28 | 2020-12-01 | 天津津航技术物理研究所 | Refrigeration infrared core assembly heat radiation structure and refrigeration infrared core |
| CN113423231A (en) * | 2021-06-09 | 2021-09-21 | 浙江大华技术股份有限公司 | Thermal imaging equipment |
| WO2022004507A1 (en) * | 2020-06-29 | 2022-01-06 | 株式会社堀場製作所 | Radiation thermometer |
| CN115291458A (en) * | 2022-07-22 | 2022-11-04 | 上海卫星工程研究所 | Satellite-borne camera multi-difference power consumption refrigerating unit, combined heat control method and satellite |
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| CN115291458A (en) * | 2022-07-22 | 2022-11-04 | 上海卫星工程研究所 | Satellite-borne camera multi-difference power consumption refrigerating unit, combined heat control method and satellite |
| CN115291458B (en) * | 2022-07-22 | 2024-03-12 | 上海卫星工程研究所 | Satellite-borne camera multiple differential power consumption refrigerating unit, combined heat control method and satellite |
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Address after: 710077 8th floor, block a, no.1309, Shanglinyuan 4th Road, high tech Zone, Xi'an City, Shaanxi Province Applicant after: Xi'an zhongkelide Infrared Technology Co.,Ltd. Address before: 710077 8th floor, block a, no.1309, Shanglinyuan 4th Road, high tech Zone, Xi'an City, Shaanxi Province Applicant before: XI'AN TELLHOW INFRARED TECHNOLOGY Co.,Ltd. |