CN109459140A - A kind of overlarge area infra-red radiation target plate for infra-red radiation field testing - Google Patents
A kind of overlarge area infra-red radiation target plate for infra-red radiation field testing Download PDFInfo
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- CN109459140A CN109459140A CN201811489479.4A CN201811489479A CN109459140A CN 109459140 A CN109459140 A CN 109459140A CN 201811489479 A CN201811489479 A CN 201811489479A CN 109459140 A CN109459140 A CN 109459140A
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- 230000005855 radiation Effects 0.000 title claims abstract description 88
- 238000012360 testing method Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 53
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 8
- 239000012774 insulation material Substances 0.000 claims description 8
- 229910000737 Duralumin Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 2
- 238000002834 transmittance Methods 0.000 abstract description 3
- 239000003381 stabilizer Substances 0.000 abstract 1
- 238000001931 thermography Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005457 Black-body radiation Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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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
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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
- G01J5/80—Calibration
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Abstract
The invention proposes a kind of overlarge area infra-red radiation target plates for infra-red radiation field testing, including radiating surface structure, heating system, temperature measurement system, temperature control system and sealed thermal insulating system；Radiating surface structure includes radiating surface ontology, bindiny mechanism and stable supporting mechanism；Wherein radiating surface ontology is formed by three pieces of sub- radiating surfaces are longitudinal spliced having a size of 1.5m × 1.5m, the infra-red radiation radiating surface ontology that temperature range is+5 DEG C of environment temperature -150 DEG C.Target plate of the present invention can be as the uniform large area Standard Infrared Source of temperature, it is mainly used for the remote outfield calibration of the infrared radiometers devices such as infrared radiometer, thermal imaging system, infrared radiation temperature measurement device device and calibration, infra-red radiation standard as standard stabiliser simultaneously, the atmospheric transmittance for field infrared band measure.
Description
Technical field
The invention belongs to optical radiation measurement field, specially a kind of overlarge area for infra-red radiation field testing is infrared
Radiate target plate.
Background technique
Infra-red radiation calibration mostly uses blackbody radiation source, but for infra-red radiation field testing, such as in the field environment
When infrared radiometer device is demarcated and is calibrated, since tested target is distant with a distance from measuring instrument, and black matrix
Radiation source swept area is smaller (maximum face source black matrix Net long wave radiation face is no more than 0.4m currently on the market), black when causing to demarcate
Body radiation source is smaller in the ratio that infrared radiometer device imaging accounts for, almost a point, into infrared radiation measurement
The infra-red radiation overwhelming majority of instrument will result in red from background radiation, and due to the randomness and unstability of background
The calibration of external radiation measuring instrument is inaccurate, and then influences the measurement result of infrared signature.
Further, since blackbody radiation source swept area is smaller, radiant power is smaller, demarcates to infrared radiometer device
When, radiant power/voltage response curves in lower response range can only be demarcated, to the biggish test target of radiant power into
When row test, error very serious will be generated, measurement result accuracy not can guarantee at all.
Summary of the invention
The calibration in the field environment of infrared radiometer device and calibration are to infrared radiometer device field testing
Accuracy plays a decisive role, and the accuracy of calibration is for accurate evaluation China forward-looking infrared, infrared search and tracking, infrared
The outfield performance of the equipments such as alarm plays a decisive role, in order to realize the accurate mark of infra-red radiation instrument under field environment
Fixed, the present invention proposes a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing, may be implemented to fill at a distance
The infra-red radiation instrument accurate calibration of full visual field.
The technical solution of the present invention is as follows:
A kind of overlarge area infra-red radiation target plate for infra-red radiation field testing, it is characterised in that: including spoke
Penetrate face structure, heating system, temperature measurement system, temperature control system and sealed thermal insulating system；
The radiating surface structure includes radiating surface ontology, bindiny mechanism and stable supporting mechanism；
The radiating surface ontology is made of the sub- radiating surface of multi-disc longitudinally through bindiny mechanism's splicing；In every sub- radiating surface
It is carved with equally distributed groove in the back side；Sub- radiating surface front is infra-red radiation face, and surface carries out frosting treatment and surface spraying is full
The infrared coating that sufficient emissivity requires；
The radiating surface ontology is supported by stable supporting mechanism；The stable supporting mechanism includes connecing with radiating surface ontology
The inner frame and external means of support of touching；The inner frame is made of heat-insulating material, inner frame and radiating surface ontology
Outer is fixedly connected；The inner frame lower part is fixed in external means of support；
The heating system is realized on heater strip using ceramic pipe sleeve, and is connected with temperature control system；The full ceramics of set
The heater strip of pipe is uniformly placed in the groove at the sub- radiating surface back side；
The temperature measurement system is using the temperature sensor for being embedded in sub- radiation side, and by the target plate temperature of measurement
It is fed back to temperature control system；
The temperature control system includes temperature controller；The temperature controller is mounted in external means of support, and
It is connected with heating system；Target plate temperature of the temperature controller according to setting and the target plate temperature from temperature measurement system acquisition,
Output electric current is adjusted, control heating system makes target plate temperature reach set temperature；
The sealed thermal insulating system includes thermal insulation material and shell；Filled thermal insulation materials are led at the radiating surface ontology back side
Cross shell encapsulation.
Further preferred embodiment, a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing,
It is characterized by: the radiating surface ontology is by the sub- radiating surface of three 1.5m × 0.5m longitudinally through bindiny mechanism's splicing group
At；The radiating surface ontology is made of duralumin material.
Further preferred embodiment, a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing,
It is characterized by: the heating system uses the heating method of multi-channel parallel, per a corresponding sub- radiating surface all the way.
Further preferred embodiment, a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing,
It is characterized by: the temperature control system individually adjusts resistance for every be provided with all the way of heating system parallel connection, lead to
Resistance adjustment is overregulated per input power all the way, guarantees the temperature uniformity of entire target plate.
Further preferred embodiment, a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing,
It is characterized by: the bindiny mechanism is made of connecting plate, connector and fastener；It is provided in connecting plate and sub- radiating surface edge
Connector, is inserted into the connecting hole of connecting plate and sub- radiating surface edge by connecting hole respectively, and is fixed by fastener, by three
The sub- radiating surface of 1.5m × 0.5m is in longitudinal spliced composition radiating surface ontology.
Further preferred embodiment, a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing,
It is characterized by: the surrounding of inner frame is fixed with heat preservation eaves in the stable supporting mechanism, heat-insulated cavity is formed, reduces air
The influence that target plate is heated in convection current.
Further preferred embodiment, a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing,
It is characterized by: the external means of support uses steel-frame structure.
Beneficial effect
The invention proposes a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing, radiating surface ontologies
It is spliced into and is formed by three pieces of sub- radiating surfaces, swept area can achieve 1.5m × 1.5m, black much larger than face source at present on the market
Body.And have many advantages, such as that at low cost, structure is simple, easy to carry, temperature uniformity is good, emissivity is high.It can be used for infra-red radiation
The field of measuring instrument is calibrated and is calibrated at a distance, and since swept area is big and temperature is uniform, measurement error is far smaller than common
Face source black matrix, and can be used for the infrared atmospheric transmittance in-site measurement of level in outfield, for accurate evaluation China forward-looking infrared,
The outfield performance of the weaponrys such as infrared search and tracking, infrared warning plays a crucial role.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is " overlarge area infra-red radiation target plate " structure chart of present example；
Fig. 2 is the target plate heating system and temp measuring system schematic diagram of present example；
Fig. 3 is bindiny mechanism's schematic diagram of present example；
Fig. 4 is the sealed thermal insulating system schematic of present example；
Fig. 5 is the stabilization support system schematic diagram of present example.
Symbol description
1- target plate ontology；2- stable supporting mechanism；3- temperature controller；4- groove and heater strip；5- temperature probe；6- connection
Part；7- connecting plate；8- thermal insulation material；9- lagging casing；10- external means of support；11- inner frame；12 heat preservation eaves.
Specific embodiment
The embodiment of the present invention is described below in detail, the embodiment is exemplary, it is intended to it is used to explain the present invention, and
It is not considered as limiting the invention.
The calibration in the field environment of infrared radiometer device and calibration are to infrared radiometer device field testing
Accuracy plays a decisive role, and the accuracy of calibration is for accurate evaluation China forward-looking infrared, infrared search and tracking, infrared
The outfield performance of the equipments such as alarm plays a decisive role, in order to realize the accurate mark of infra-red radiation instrument under field environment
Fixed, the present invention proposes a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing, may be implemented 1.5m ×
1.5m swept area, the radiation of+5 DEG C of environment temperature -150 DEG C temperature range standard IR, may be implemented to be full of visual field at a distance
Infra-red radiation instrument accurate calibration, it is ensured that the accurate calibration of field infrared radiometer device and calibration, and can be used for
The in-site measurement of infrared atmospheric transmittance.
This be used for infra-red radiation field testing overlarge area infra-red radiation target plate, including radiating surface structure, heating system,
Temperature measurement system, temperature control system and sealed thermal insulating system.
The radiating surface structure includes radiating surface ontology, bindiny mechanism and stable supporting mechanism.
The radiating surface ontology is made of the sub- radiating surface of three 1.5m × 0.5m longitudinally through bindiny mechanism's splicing；Institute
Radiating surface ontology is stated to be made of duralumin material.Duralumin can guarantee to can satisfy this in 450 DEG C of temperature normal uses below
Target plate is heated to 150 DEG C of requirement in invention.And the materials such as the density ratio steel of duralumin are much lower, effectively reduce the weight of target plate
Amount is carried convenient for outfield and is used.
The bindiny mechanism is made of connecting plate, connector and fastener；Company is provided in connecting plate and sub- radiating surface edge
Hole is connect, connector is inserted into the connecting hole of connecting plate and sub- radiating surface edge respectively, and is fixed by fastener, by three 1.5m
The sub- radiating surface of × 0.5m is in longitudinal spliced composition radiating surface ontology.
The heating system is located at the radiating surface ontology back side, in order to guarantee that target plate can be heated to required temperature,
It is carved with equally distributed groove in every sub- radiating surface back side.The heating system uses ceramic pipe sleeve to realize on heater strip, and
It is connected with temperature control system；The heater strip for covering full ceramic tube is uniformly placed in the groove at the sub- radiating surface back side, to guarantee target
Plate can be heated properly.Sub- radiating surface front is infra-red radiation face, in order to improve its emissivity, is carried out at texturing to its surface
Reason and surface spraying meet the infrared coating of emissivity requirement, it can be ensured that its emissivity with higher.
The radiating surface ontology is supported by stable supporting mechanism, and the stable supporting mechanism includes connecing with radiating surface ontology
The inner frame and external means of support of touching.The inner frame is fixedly connected with radiating surface ontology outer, and inner frame uses
Heat-insulating material resistant to high temperature is made, so that the heat on target plate will not be transmitted in external means of support, improves heater strip production
Raw utilization efficiency, reduces heating power.The inner frame lower part is fixed in external means of support, external means of support
Using steel construction, convenient transportation, disassembly and installation.Influence due to cross-ventilation to heating be also it is very big, so this hair
The surrounding of the bright inner frame in stable supporting mechanism is fixed with heat preservation eaves, forms heat-insulated cavity, maximally reduces air
The influence that target plate is heated in convection current guarantees that target plate can heat the temperature of needs in stronger cross-ventilation.
The temperature measurement system is using the temperature sensors of high precision for being embedded in sub- radiation side, and by the target of measurement
Plate temperature is fed back to temperature control system.
The temperature control system includes temperature controller, be mainly used for heavy caliber infra-red radiation target plate temperature measurement and
Control.The temperature controller is mounted in external means of support, can show and store the temperature data of measurement, and with heating
System is connected；Target plate temperature of the temperature controller according to setting and the target plate temperature from temperature measurement system acquisition, using intelligence
The PID auto-adjustment control of energy, adjusts output electric current, and control heating system reaches target plate temperature and stablizes in set temperature.
It is in order to guarantee that heating power needs very big heated current, then corresponding to add due to traditional single channel heating means
The length of heated filament will greatly reduce, and the concentration of heater strip distribution is inadequate, just not can guarantee the uniformity of target plate temperature, this
In using three pieces of sub- radiating surfaces splicings method, the mode that when heating takes three tunnel parallel connections to heat reduces per electric current all the way,
So that the heater strip length of winding greatly increases, the temperature uniformity of target plate ensure that.
And since three pieces of sub- radiating surfaces are using the branch being longitudinally arranged above and below, the heat meeting of son radiation surface radiation below
It is transmitted to sub- radiating surface above, the temperature of prescription radiating surface is caused to be higher than setting temperature, therefore in parallel for heating system
Every individually ceramics that are provided with all the way in three tunnels adjust resistance, by ceramics adjusting resistance adjustment per input work all the way
Rate guarantees the temperature uniformity of entire target plate.
The sealed thermal insulating system is mainly used for the guarantor of heavy caliber infra-red radiation target plate rest part in addition to Net long wave radiation face
Temperature, it is ensured that target plate can be heated to the temperature needed with the smallest power.The sealed thermal insulating system includes thermal insulation material and outer
Shell；Filled thermal insulation materials install shell additional for encapsulating the thermal insulation material at the target plate back side at the radiating surface ontology back side.Effectively subtract
The low loss of heat, increases heater strip to the heating efficiency of target plate, ensure that thermal energy effectively passes to effective spoke of target plate
It penetrates on face.
Specific embodiment is given below:
The present embodiment provides a kind of overlarge area infra-red radiation target plate, the overlarge area infra-red radiation target plate size is big, ties
Structure is simple, temperature is uniform, emissivity is high, can be used as calibration and school of the calibrated radiation source for field infrared radiometer device
It is quasi-.
The overlarge area infra-red radiation target plate structural schematic diagram of the present embodiment is as shown in Figure 1.
Wherein radiating surface ontology is formed by three pieces of sub- radiating surfaces of 1.5m × 0.5m are longitudinal spliced, vertical using three pieces of sub- radiating surfaces
To the scheme of splicing, there are two advantages: 1. reduce the difficulty of machining, if directly processing the target plate of a 1.5m × 1.5m,
Mechanical processing difficulty is very big, and the method for using three pieces of sub- radiating surface splicings, greatly reduces mechanical processing difficulty；2. according to
The method of traditional single channel heating needs very big heated current to guarantee heating power, then the length of corresponding heater strip
It will greatly reduce, the concentration of heater strip distribution is inadequate, just not can guarantee the uniformity of target plate temperature.And use three pieces of sons
The method of radiating surface splicing, the mode that when heating takes tri- tunnel parallel connection of Shi to heat are reduced per electric current all the way, so that winding
Heater strip length greatly increase, ensure that the temperature uniformity of target plate.
Sub- radiating surface is made of duralumin material.Heating system is located at the back side of sub- radiating surface, is set using uniform groove
Meter, and the heater strip for putting on porcelain tube will be uniformly wrapped in the groove processed, by powering to heater strip come to target plate
Heating, as shown in Figure 1.
Shown in the heat Calculation such as formula (1) of target plate heating:
Q=Pt=mc Δ T (1)
In formula: t is heating time (unit: second), and m is quality (unit: kilogram), and c is the specific heat capacity (unit: J of material
(KgK), Δ T is the temperature (unit: K) for needing to heat.
Wherein: the density of target plate material duralumin LY12 is 2.7 × 103kg/m3, specific heat capacity is c=880J (KgK)；Target plate
Size be 1.5m × 1.5m × 0.01m, the then quality of target plate are as follows: m=volume × density=1.5 × 1.5 × 0.01 × 2.7 ×
103=60kg；
It is assumed that environment temperature is 25 DEG C.Then ideally (do not consider thermal losses), target plate is heated to required for 150 DEG C
Heat are as follows:
Q=Pt=60 × 880 × (150-25)=6600000J
Rule of thumb, reach thermal balance when general heating time is 1200 seconds (20 minutes), then power required for heating
Are as follows:
P=Q/t=6600000/1200=5500W
Due to target plate surface in the form of convection current constantly to external cooling, according to heat radiation power calculation formula:
PHeat dissipation=hA Δ T (2)
In formula: h is the coefficient of heat transfer (unit: W/m2K), A is heat dissipation area (unit: m2), Δ T is the temperature difference (unit: K).
Wherein: the coefficient of heat transfer of air changes, variation range with air liquidity are as follows: (5-25) W/m2K, takes
Equal convection current 10W/m2·K；Heat dissipation area, that is, target plate swept area: 1.5m × 1.5m=2.25m2；Maximum temperature difference is 150 DEG C -25
DEG C=125 DEG C.
According to formula (2), then heat radiation power is
PHeat dissipation=10 × 2.25 × 125=2800W
Therefore, it is the sum of heating power ideally and thermal losses by target plate heating power, then heats target plate
Minimum power required for 150 DEG C are as follows:
PMinimum power=P+PHeat dissipation=5500W+2800W=8300W
In view of keeping the temperature not tight etc. influence, need to be to be suitably larger than the power and be just able to satisfy the heating of target plate to want
It asks.
Because radiating surface ontology is made of three pieces of sub- radiating surface splicings, every piece of sub- radiating surface, which has, oneself individually to be added
Thermal modules, entire target plate are three parts heating module, and each module heating power is 3000W, heated current 10A, and voltage is
380V, resistance are 38 ohm, and heater strip selects the nickel filament of Φ 1mm, and every meter of resistance is 1.4 ohm, then length is about 27 meters, foot
It is enough to be intensively uniformly wrapped in heater strip in the groove at the sub- target plate back side, it ensure that the uniformity of target plate temperature.Three simultaneously
The total heating power of module is 9000W, greater than 8300W needed for theoretical calculation minimum power, it can be ensured that target plate is uniformly heated to
150 DEG C, and stable work.
Sub- radiating surface front frosting treatment, can be improved the emissivity of material itself, and target plate is given after frosting treatment
The black infrared coating of surface spraying high emissivity, it is ensured that slin emissivity >=0.93 of the target plate.The emissivity of target plate
Higher, the ability for sending out infra-red radiation is stronger, and the infrared radiation signal that infrared radiometer device receives is bigger, then mentions
The high signal-to-noise ratio of signal testing, reduces measurement error.
Temp measuring system is located at the side of sub- radiating surface, selects thermocouple thermometer as temperature probe, divides and surveys three
Temperature probe nuzzles in advance three pieces of son radiation sides the thermometer holes held successfully in advance in, and by the output end of temperature probe and temperature control
Device processed is connected, and the temperature of target plate can be read by temperature controller.
High-precision temperature control system is made of temperature controller and heating conversion module, and temperature controller selects PID tune
Save the temperature controller of control.When work, sub- radiating surface is arranged by the temperature heated to needs, temperature by temperature controller first
It spends controller and is heated by heater strip to sub- radiating surface, temperature sensor constantly gives the temperature feedback of sub- radiating surface to temperature control
Device processed, temperature controller are controlled the heating power of heater strip by the temperature value of feedback, use intelligence in entire heating process
PID auto-adjustment control guarantees that sub- radiating surface can be heated to and stablize in set temperature.Due to general temperature control
Device processed output electric current is smaller, be not achieved the present invention claims output current requirements, install heating conversion module additional here, guarantee temperature control
The output electric current of device can satisfy target plate heating requirements.
The bindiny mechanism of the overlarge area infra-red radiation target plate is made of connecting plate and connector, as shown in Figure 3.Connecting plate
It is provided with connecting hole on radiating surface ontology, connector is inserted into the connecting hole of connecting plate and radiating surface ontology respectively, and is passed through
Fastener is fixed, and three pieces of sub- radiating surfaces of 1.5m × 0.5m can be spliced into 1.5m × 1.5m radiating surface ontology.
The sealed thermal insulating system of the overlarge area infra-red radiation target plate is as shown in figure 4, at the sub- radiating surface back side using filling
The glass fibre cotton of 20mm thickness is kept the temperature, and is then encapsulated the heat insulation layer in glass fibre face with shell.Glass fibre cotton
Thermal coefficient be (0.042-0.049) W/mK, have good heat-insulating property, effectively improve heating system heating effect
Rate ensure that thermal energy effectively passes on the Net long wave radiation face of sub- radiating surface, make heating system with the smallest power by sub- radiation
Face is heated to the temperature of setting.Glass fibre face can satisfy completely 150 DEG C of target plate of temperature with resistance to 400 DEG C of high temperature simultaneously
Spend the upper limit.
The stable supporting device of the overlarge area infra-red radiation target plate is as shown in figure 5, stable supporting device is used for radiating surface
The support of main part includes inner frame and external means of support with radiating surface body contacts.Its inner frame and spoke
Penetrating face body contacts part selects the polytetrafluoroethylene material of 50mm thickness to be made, polytetrafluoroethylene (PTFE) excellent heat insulating performance, thermally conductive system
Number improves heating so that the heat on radiating surface will not be transmitted in external means of support for thermal coefficient 0.256W/mK
The utilization efficiency that silk generates, reduces heating power.External means of support use steel construction, convenient transportation, disassembly and installation, and
And wheel is installed in frame base, convenient for the movement of target plate.One is designed in the surrounding of stable supporting device inner frame simultaneously
The heat preservation eaves of 100mm forms a small cavity, maximally reduces the influence that cross-ventilation heats target plate, guarantee
Target plate can heat the temperature of needs in the case of stronger cross-ventilation.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (7)
1. a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing, it is characterised in that: including radiating surface knot
Structure, heating system, temperature measurement system, temperature control system and sealed thermal insulating system；
The radiating surface structure includes radiating surface ontology, bindiny mechanism and stable supporting mechanism；
The radiating surface ontology is made of the sub- radiating surface of multi-disc longitudinally through bindiny mechanism's splicing；At every sub- radiating surface back side
It is carved with equally distributed groove；Sub- radiating surface front is infra-red radiation face, and surface carries out frosting treatment and surface spraying meets hair
Penetrate the infrared coating of rate requirement；
The radiating surface ontology is supported by stable supporting mechanism；The stable supporting mechanism includes and radiating surface body contacts
Inner frame and external means of support；The inner frame is made of heat-insulating material, inner frame and radiating surface ontology outer
It is fixedly connected；The inner frame lower part is fixed in external means of support；
The heating system is realized on heater strip using ceramic pipe sleeve, and is connected with temperature control system；Cover full ceramic tube
Heater strip is uniformly placed in the groove at the sub- radiating surface back side；
The temperature measurement system is using the temperature sensor for being embedded in sub- radiation side, and by the target plate temperature of measurement to temperature
Spend control system feedback；
The temperature control system includes temperature controller；The temperature controller is mounted in external means of support, and with add
Hot systems are connected；Target plate temperature of the temperature controller according to setting and the target plate temperature from temperature measurement system acquisition, are adjusted
Electric current is exported, control heating system makes target plate temperature reach set temperature；
The sealed thermal insulating system includes thermal insulation material and shell；Filled thermal insulation materials pass through outer at the radiating surface ontology back side
Shell encapsulation.
2. a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing according to claim 1, feature
Be: the radiating surface ontology is made of the sub- radiating surface of three 1.5m × 0.5m longitudinally through bindiny mechanism's splicing；It is described
Radiating surface ontology is made of duralumin material.
3. a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing according to claim 1, feature
Be: the heating system uses the heating method of multi-channel parallel, per a corresponding sub- radiating surface all the way.
4. a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing according to claim 3, feature
Be: the temperature control system every be all the way provided in parallel for heating system individually adjusts resistance, passes through adjusting
Resistance adjustment guarantees the temperature uniformity of entire target plate per input power all the way.
5. a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing according to claim 1, feature
Be: the bindiny mechanism is made of connecting plate, connector and fastener；Connection is provided in connecting plate and sub- radiating surface edge
Connector, is inserted into the connecting hole of connecting plate and sub- radiating surface edge by hole respectively, and is fixed by fastener, by three 1.5m ×
The sub- radiating surface of 0.5m is in longitudinal spliced composition radiating surface ontology.
6. a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing according to claim 1, feature
Be: the surrounding of inner frame is fixed with heat preservation eaves in the stable supporting mechanism, forms heat-insulated cavity, reduces cross-ventilation pair
The influence of target plate heating.
7. a kind of overlarge area infra-red radiation target plate for infra-red radiation field testing according to claim 6, feature
Be: the external means of support uses steel-frame structure.
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