CN104062016A - Low-temperature infrared target source cold beam refrigerating structure - Google Patents
Low-temperature infrared target source cold beam refrigerating structure Download PDFInfo
- Publication number
- CN104062016A CN104062016A CN201410335728.XA CN201410335728A CN104062016A CN 104062016 A CN104062016 A CN 104062016A CN 201410335728 A CN201410335728 A CN 201410335728A CN 104062016 A CN104062016 A CN 104062016A
- Authority
- CN
- China
- Prior art keywords
- cold
- temperature
- infrared target
- bundle
- source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Radiation Pyrometers (AREA)
Abstract
The invention belongs to the field of the low temperature and infrared technology and discloses a low-temperature infrared target source cold beam refrigerating structure. The low-temperature infrared target source cold beam refrigerating structure is composed of a refrigerating board, cold beams and a liquid nitrogen container, wherein one end of each cold beam is distributed on the surface of the refrigerating board; the other end of each cold beam is inserted into the liquid nitrogen container; the refrigerating board is cooled through heat conduction of the cold beams and cools a blackbody surface source through the action of heat conduction. The designed cold beam refrigerating structure is used in a low-temperature infrared target source system, a variable-temperature low-temperature infrared target source can reach the temperature control range of a wide temperature area of 125-300 K, the temperature range is enlarged compared with the prior art, a calibrated standard is provided for detection of an infrared sensor in the low temperature environment, and meanwhile accuracy of working of a detector in the space is improved. The designed cold beam refrigerating device can ensure even distribution of the temperature field of the blackbody surface source, and temperature uniformity is smaller than 0.004 K.
Description
Technical field
The invention belongs to low temperature and infrared technique field, relate to the refrigeration structure in a kind of low temperature infrared target source.
Background technology
Infrared application product category is various, is widely used.Infrared since 1800 are found, people never stopped its research, had developed numerous application products at present, from medical treatment, detection, aviation to fields such as military affairs, can see almost everywhere infrared figure.Very wide of the development prospect of infrared technique, has extremely wide application in dual-use field.Can be divided into by application: safety-security area, fire-fighting domain, power domain, enterprise's processing procedure control field, medical field, building field, remote sensing field etc.In order to test and the performance of calibration sensor, determine the funtcional relationship between output signal and the calibrated radiation source of detector in operating temperature range, and the target information inverting of obtaining in detection system flight course is obtained to spectral reflection characteristic and the spectral characteristics of radiation of this target, must apply the low temperature black matrix target source with virtual space infrared origin its linear response degree and heterogeneity are calibrated to correction.
At present the perform region temperature homogeneity in conventional black matrix face source is ± 0.5K, develops at present ripe low temperature black matrix target source and generally only can reach the low temperature of 220K.
Summary of the invention
The object of this invention is to provide the cold bundle refrigerating plant in a kind of low temperature infrared target source, can control blackbody temperature and change continuously between 125K ~ 300K, temperature homogeneity <0.004K.
The object of the invention is to be achieved through the following technical solutions:
The cold bundle refrigeration structure in a kind of low temperature infrared target source, formed by cold plate, cold bundle and liquid nitrogen container, one end of cold bundle is arranged in cold plate surface, the other end of cold bundle inserts the inside of liquid nitrogen container, heat conduction by cold bundle makes cold plate cooling, and cold plate is lowered the temperature to black matrix face source by conduction of heat simultaneously.
In the present invention, described liquid nitrogen entrance and liquid nitrogen outlet are positioned at the upper end of liquid nitrogen container, can facilitate like this filling of liquid nitrogen and the discharge of liquid nitrogen gas.
Low temperature infrared target origin system is made up of black matrix, heating plate, three parts of cold plate, the refrigeration structure of the present invention's design is used for to low temperature infrared target origin system, described cold plate is directly connected with cold bundle, and on cold plate, the different structure arrangement mode of cold bundle directly affects cooling time and the temperature homogeneity in black matrix face source.Cold bundle on cold plate of the present invention is that circle is spaced, liquid nitrogen transfers heat to cold plate by cold bundle, cold plate is lowered the temperature to black matrix face source by conduction of heat, the different arrangement modes of cold binding structure can make the in the situation that of cold bundle minimum number, cooling time is shortened, and temperature homogeneity is improved significantly.
The present invention has the following advantages:
1, cold bundle refrigeration structure designed the present invention is used for to low temperature infrared target origin system, can make temperature-changeable low temperature infrared target source reach the temperature-control range of the wide warm area of 125K ~ 300K, temperature range compared with prior art increases to some extent, for the detection of infrared sensor in low temperature environment provides the benchmark of calibrating, also improve the accuracy of detector at Space-Work simultaneously.
2, the designed cold bundle refrigeration structure of the present invention is separated liquid nitrogen container from vacuum tank, and therefore, the in the situation that of liquid nitrogen abundance, it is even more of a specified duration that the continuous working period of vacuum system can maintain several days.
3, the designed cold bundle refrigeration structure of the present invention can ensure that the temperature field distribution in black matrix face source is very even, temperature homogeneity <0.004K.
Brief description of the drawings
Fig. 1 is existing low temperature infrared target origin system structure diagram;
Fig. 2 is low temperature infrared target origin system structure diagram of the present invention;
Fig. 3 is the structural representation of cold bundle refrigerating plant;
Fig. 4 is cold bundle refrigeration model;
Fig. 5 is the cold plate entirety cloud atlas distribution plan of cold bundle refrigeration modes;
Fig. 6 is the cold plate side cloud atlas distribution plan of cold bundle refrigeration modes;
Fig. 7 is cloud atlas distribution plan on cold bundle refrigeration modes black matrix face source;
Fig. 8 is the temperature lowering curve figure of cold bundle refrigeration modes;
In figure, 1-vacuum tank; 2-liquid nitrogen container; 3-tank support; 4-liquid nitrogen import/export; 5-cold plate; 6-heating plate; 7-black matrix; 8-infrared window; 9-vacuum tank base; 10-vacuum unit; The cold bundle of 11-.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described; but be not limited to this; every technical solution of the present invention is modified or is equal to replacement, and not departing from the spirit and scope of technical solution of the present invention, all should be encompassed in protection scope of the present invention.
As shown in Figure 2, the cold bundle refrigeration structure in low temperature infrared target source of the present invention's design is made up of cold plate 5, cold bundle 11 and liquid nitrogen container 2, and one end of cold bundle 11 is arranged in cold plate 5 surfaces, and the other end of cold bundle 11 inserts the inside of liquid nitrogen container 2.
Low temperature infrared target system is mainly made up of Low Temperature Target origin system, measuring and controlling temp system, vacuum system three parts.According to the structural principle of the low temperature infrared target origin system of existing technical performance index requirement design as shown in Figure 1.The cold bundle refrigeration structure of the present invention's design is applied in low temperature infrared target origin system, and its structure principle chart as shown in Figure 2.
Low Temperature Target origin system is key and the core of low temperature infrared target system, and this structure is mainly made up of low temperature infrared target origin system and liquid nitrogen container 2 etc., and described low temperature infrared target origin system is made up of black matrix face source 7, heating plate 6,5 three parts of cold plate.Cold plate 5 provides even refrigeration heat sink for black matrix face source, and cold bundle 11 one end are connected with cold plate 5, and the other end is inserted in liquid nitrogen container 2, and liquid nitrogen container 2 is placed under room temperature environment, indirectly black matrix face source 7 is lowered the temperature by the conduction of heat of cold bundle 11.Heating plate 6 provides homogeneous heating thermal source for black matrix face source 7.Black matrix face source 7 is under the acting in conjunction of cold plate 5 and heating plate 6, by regulating heating power, realize temperature adjustment and the temperature control in black matrix face source 7, the radiation under different temperatures sees through infrared window 8 and is delivered to infrared sensor then, and infrared sensor is calibrated to correction.Black matrix face source 7, heating plate 6, cold plate 5 and the cold bundle 11 that it should be noted that low temperature infrared target origin system is all to adopt the red copper materials processing that pyroconductivity is higher to make, and can ensure that like this black matrix face source 7 has good temperature homogeneity.Base device in the present invention adopts the wedge shape foot rest of thermal insulation material making to support to install and fixes, and this structural design can reduce unnecessary energy loss.
Core component of the present invention is the cold bundle formula refrigeration structure of low temperature extend blackbody cold plate, cold plate 5 sizes are 150 × 150mm ~ 300 × 300mm, and thickness is 10 ~ 20mm, and cold bundle 11 length are 200 ~ 350mm, diameter of phi=5 ~ 8mm, cold bundle 11 length that are inserted in liquid nitrogen container 2 are 40 ~ 80mm.
Existing known low temperature infrared target origin system liquid nitrogen container is placed on vacuum tank inside, and this structural model continuous working period can be worked four hours at most.The designed cold bundle refrigeration modes of low temperature infrared target system that obtains is separated liquid nitrogen container 2 from vacuum tank 1 in the present invention, is placed under room temperature environment, facilitates the filling of liquid nitrogen.Liquid nitrogen container 2 and cold plate 5 are linked together and reach the object of refrigeration with cold bundle 11.Cold bundle refrigeration modes can continuous working in the situation that of liquid nitrogen abundance several days even more of a specified duration.
In cold bundle refrigeration modes, top side's body is black matrix face source 7, and middle square body is heating plate 6, and the square body of rear side is cold plate 5.Wherein: between cold plate 5 and liquid nitrogen container 2, be connected with cold bundle 11, liquid nitrogen is lowered the temperature to cold plate 5 by the heat conduction of cold bundle 11, and then indirectly black matrix face source 7 is lowered the temperature.
On cold plate 5, be arranged with the cold bundle 11 of some circles, cold bundle 11 is intervally arranged on each circle, and the cold bundle 11 of some circles increases progressively arrangement with radius Δ R=10 ~ 20mm.By a paracentral circle R=20mm 6 cold bundles 11 of arranging, R=30 ~ 40mm mono-encloses the 6 cold bundles 11 of arranging, along with increasing progressively of radius, suitably add cold bundle 11 in the region that cold bundle 11 density of outer peripheral areas are little, cold bundle 11 on cold plate 5 is distributed as far as possible evenly, in cold bundle 11 service efficiencies, the highest in the situation that, cooling-down effect and temperature homogeneity reach best.Cold bundle refrigeration model structure as shown in Figure 4.The initial temperature that model is set is room temperature 300K, and be 10800s analysis time, time step 60s, and 1/8 part that rounds body structure model is simulated, and this process is carried out to transient analysis (Transient).
Cloud atlas from Fig. 5-7 distributes, and there are five Temperature Distribution in the black matrix face source of this model, and black matrix face source central temperature is minimum, and red area temperature is the highest.Central area, face source temperature is 125.112K, and red area temperature is 125.116K.The temperature difference of this black matrix face source temperature field is 0.004K, and in this cold bundle model process of refrigerastion, cold bundle is distributed on the surface of cold plate, and cooling-down effect is better, is distributed and can be found out that the temperature difference is very little by cloud atlas.
Get two unique points on black matrix face source, provide temperature temporal evolution curve, as shown in Figure 8, in this curve map, TEMP_2 is the central point of face source green area, and TEMP_3 is the unique point of face source red area.From this curve, 10800s moment black matrix face source temperature can reach balance, and now the temperature of these two unique points is respectively 125.112K, 125.116K.
The present invention has adopted cold bundle refrigeration modes modelling structure, has had significantly and has improved for temperature homogeneity.
(1) by contrasting with refrigeration structure and refrigeration modes in the past, the temperature homogeneity that adopts cold bundle refrigeration modes of the present invention to obtain can reach the precision of 0.004K.
(2) the cold bundle refrigeration modes in low temperature infrared target source that utilizes the present invention to design, the length of cold bundle, the diameter of cold bundle is all the optimum dimensions under equivalent environment.
Claims (8)
1. the cold bundle refrigeration structure in low temperature infrared target source, is characterized in that described refrigeration structure is made up of cold plate, cold bundle and liquid nitrogen container, and one end of cold bundle is arranged in cold plate surface, and the other end of cold bundle inserts the inside of liquid nitrogen container.
2. the cold bundle refrigeration structure in low temperature infrared target according to claim 1 source, is characterized in that the upper end of described liquid nitrogen container is provided with liquid nitrogen entrance and liquid nitrogen outlet.
3. the cold bundle refrigeration structure in low temperature infrared target according to claim 1 source, the size that it is characterized in that described cold plate is 150 × 150mm ~ 300 × 300mm.
4. the cold bundle refrigeration structure in low temperature infrared target according to claim 1 source, the thickness that it is characterized in that described cold plate is 10mm ~ 20mm.
5. the cold bundle refrigeration structure in low temperature infrared target according to claim 1 source, is characterized in that the length of described cold bundle is 200 ~ 350mm, and the cold Shu Changdu being inserted in liquid nitrogen container is 40 ~ 80mm.
6. the cold bundle refrigeration structure in low temperature infrared target according to claim 1 source, is characterized in that the diameter of phi=5 ~ 8mm of described cold bundle.
7. according to the cold bundle refrigeration structure in low temperature infrared target source described in claim 1,3,4,5 or 6, it is characterized in that the surface alignment of described cold plate has the cold bundle of some circles, on each circle, be placed with several cold bundles.
8. the cold bundle refrigeration structure in low temperature infrared target according to claim 7 source, is characterized in that the cold bundle of described some circles is with radius Δ R=10 ~ 20mm arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335728.XA CN104062016A (en) | 2014-07-15 | 2014-07-15 | Low-temperature infrared target source cold beam refrigerating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335728.XA CN104062016A (en) | 2014-07-15 | 2014-07-15 | Low-temperature infrared target source cold beam refrigerating structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104062016A true CN104062016A (en) | 2014-09-24 |
Family
ID=51549836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410335728.XA Pending CN104062016A (en) | 2014-07-15 | 2014-07-15 | Low-temperature infrared target source cold beam refrigerating structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104062016A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473025A (en) * | 2018-12-27 | 2019-03-15 | 北京航天长征飞行器研究所 | Space multiple orbital attitudes photo-thermal coupling ring border ground simulation device and method |
| CN111323136A (en) * | 2020-02-28 | 2020-06-23 | 中国科学院国家空间科学中心 | Liquid nitrogen refrigeration calibration cold source for microwave radiometer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1604421A (en) * | 1978-05-25 | 1981-12-09 | Shepherd M W | Heat transfer apparatus |
-
2014
- 2014-07-15 CN CN201410335728.XA patent/CN104062016A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1604421A (en) * | 1978-05-25 | 1981-12-09 | Shepherd M W | Heat transfer apparatus |
Non-Patent Citations (2)
| Title |
|---|
| 徐冰等: "低温真空环境的红外背景模拟器的研制", 《航天器环境工程》 * |
| 杨建斌等: "面源红外定标黑体控温热分析", 《真空与低温》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473025A (en) * | 2018-12-27 | 2019-03-15 | 北京航天长征飞行器研究所 | Space multiple orbital attitudes photo-thermal coupling ring border ground simulation device and method |
| CN111323136A (en) * | 2020-02-28 | 2020-06-23 | 中国科学院国家空间科学中心 | Liquid nitrogen refrigeration calibration cold source for microwave radiometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102818636B (en) | A kind of Calibration Method of thermal infrared imager low temperature thermometric | |
| Sweeting et al. | Measurement of thermal conductivity for fibre-reinforced composites | |
| Nikolopoulou et al. | Improvements to the globe thermometer for outdoor use | |
| CN103925759B (en) | Wide warm area temperature control thermostat for thermophysical property measurement | |
| CN107014494A (en) | A kind of high precision surface source blackbody radiation source device applied under the conditions of vacuum and low temperature | |
| CN102279065B (en) | Automatic recurring device for gallium fixed points | |
| CN105203591B (en) | The measurement method of spacecraft testing model hot wall heat flow density | |
| CN206074130U (en) | Standard black body radiation source | |
| JP2014048176A5 (en) | ||
| CN106370312A (en) | Absolute radiometer and absolute radiometer background space radiation and heat transfer measuring method | |
| CN104062016A (en) | Low-temperature infrared target source cold beam refrigerating structure | |
| CN108139151A (en) | For developing the device and method of the freeze-drying scheme using be pilot | |
| CN102090884B (en) | Cavity device of blackbody radiation source | |
| CN103677011A (en) | Control system applicable to wide temperature ranges of surface source black bodies under vacuum condition | |
| CN105911094B (en) | The measuring device and high temperature heat transfer experimental method of micro-/ nano porous material high temperature heat transfer | |
| CN204027702U (en) | The blackbody cavity structure of blackbody radiation source | |
| CN102128687B (en) | Blackbody radiant source cavity device with calibration accessory | |
| CN201929948U (en) | Cavity device of black body radiation source | |
| CN208171904U (en) | Measure the automation equipment of vacuum glass heat transfer coefficient | |
| CN105929872A (en) | Temperature control device and method for medium temperature surface radiation source | |
| CN104914126B (en) | Low melting point trnaslucent materials phase transition process radiant heating and temperature measuring equipment | |
| CN203849193U (en) | Indoor rock sample heat conduction coefficient testing device | |
| CN103983363A (en) | Optimal refrigerating plate for low-temperature infrared target source | |
| CN104019903A (en) | Black body cavity structure of black body radiation source | |
| CN107966474A (en) | A kind of device based on steady state method measurement block thermal conductivity factor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140924 |