CN202661174U - Normal-temperature large-surface-source double-blackbody radiation source - Google Patents
Normal-temperature large-surface-source double-blackbody radiation source Download PDFInfo
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- CN202661174U CN202661174U CN 201220207545 CN201220207545U CN202661174U CN 202661174 U CN202661174 U CN 202661174U CN 201220207545 CN201220207545 CN 201220207545 CN 201220207545 U CN201220207545 U CN 201220207545U CN 202661174 U CN202661174 U CN 202661174U
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Abstract
The utility model discloses a normal-temperature large-surface-source double-blackbody radiation source, which is mainly used for the calibration and testing of an infrared system. The utility model provides a large-surface-source blackbody radiation source in a double-blackbody form. The double-blackbody radiation source is of a split-type structure, and comprises a double-blackbody radiation source and a double-blackbody radiation source controller, wherein the double-blackbody radiation source comprises two independently-running blackbody radiation sources, and different temperature values can be separately set for each blackbody radiation source; a mirror mechanism is used for rapidly switching designated infrared radiations; the blackbody radiation sources can output infrared radiations below normal temperature by using an active refrigeration technology; and the double-blackbody radiation source controller guarantees that the temperature Te of an equivalent blackbody entering a tested device is equal to the temperature T of the blackbody radiation source by using an adaptive temperature compensation technology. The large-surface-source double-blackbody radiation source disclosed by the utility model has the characteristics that the radiation source is suitable for field application; thanks to the rapid switching between two temperature points, the noise equivalent temperature difference is easy to be tested; and the adaptive temperature compensation technology is adopted.
Description
Technical field:
This patent relates to the blackbody calibration system, and is special, relates to the blackbody calibration system that Quick Measurement infrared system noise equivalent temperature difference gathers.
Background technology:
Along with the continuous maturation of refrigeration type infrared detector technology and continuing to bring out of non-refrigeration type infrared eye, infrared technique has more and more been used various aspects in daily life.For infrared system, the noise equivalent temperature difference (NETD) that an important indicator estimating its performance quality is exactly this system, it is the important parameter of weighing thermal imagery system performance quality, sensitivity that can estimating system is detector performance, imaging optical system and the comprehensive evaluation value of sensing circuit for this system.
Noise equivalent temperature difference measuring method commonly used is the radiating surface with infrared equipment alignment criteria blackbody radiation source; Blackbody temperature is set in T
1, the acquisition system signal value; Black matrix is set in T
2, the acquisition system signal value; At T
1, T
2Calculate noise equivalent temperature difference on the basis of two groups of signal values.Test obtains more accurately, and noise equivalent temperature difference needs repeated acquisition repeatedly.
Infrared system is carried out will considering equally when noise equivalent temperature difference is measured the impact of environmental factor in the open air.Usually face blackbody radiation source self emissivity is less than 1, and enters the equivalent blackbody temperature T of equipment under test
eWith environment temperature T
aChange and change: environment temperature is during less than the black-body resource temperature T, T
e＜T; T
aDuring=T, T
e=T=T
aT
aDuring＞T, T
e＞T.The environment temperature T of Various Seasonal, different geographical
aDiffer greatly, on the same day, different environment temperature T constantly
aAlso alter a great deal.This just needs to adopt the self-adaptive temperature compensation technique, solves environment temperature to the impact of equivalent blackbody temperature, to realize in different black-body resource temperature T, varying environment temperature T
aEnter the equivalent blackbody temperature T of equipment under test down,
eBe equal to the blackbody radiation source temperature T.
Domestic calibration blackbody commonly used mainly adopt heating wire as heating element, fan as cooling module.Such black matrix has following some deficiency in the open air when calibrating:
1. black matrix is slow stabilization time, and gathering many group systems data needs several hours usually.Environmental baseline often changes within the so long time, causes the detectivity fluctuation of infrared system itself, affects the measurement of noise equivalent temperature difference.
2. do not have the active refrigeration element, such black matrix can't be with Temperature Setting below normal temperature, so that infrared system can't be carried out normal temperature following system calibration and data acquisition.
3. the arrange different parts heating of uneven and same heating wire of such black matrix heating wire is inhomogeneous, causes the emissivity of radiating surface inhomogeneous, causes the measuring error of the system noise equivalence temperature difference.
4. the slin emissivity of such black matrix about 0.98, has certain gap with the theoretical surface emissivity usually.Cause the actual radiation that receives of infrared system lower than theoretical value, make the system noise equivalence temperature difference of measuring higher.
Summary of the invention:
This patent has proposed the two blackbody radiation origin systems in a kind of open-air large source of normal temperature of using, and for infrared system provides calibrated radiation source, is used for Quick Acquisition and the calculating of the noise equivalent temperature difference of infrared system.
The function of this patent is achieved in that native system is comprised of two blackbody radiation sources and two blackbody radiation source controllers, and two blackbody radiation source controllers are used for the temperature of the two blackbody radiation sources of control and the reflection direction of catoptron; Two blackbody radiation sources are used for the infrared radiation of output assigned temperature.
As shown in drawings: two blackbody radiation sources comprise two blackbody radiation sources 1 and two blackbody radiation source controller 2, wherein two blackbody radiation sources 1 comprise radiating surface support 5, radiation source panel 6, heat insulating washer 8, semiconductor chilling plate 9, heating radiator 10, radiator bearer 11, ac fan 12, catoptron housing 13, catoptron 14, catoptron briquetting 15, catoptron liner plate 16, reflection mirror rotation shafts 17, bearing 18, bearing (ball) cover 19, the synchronizing jugged A20 that takes turns, the synchronizing jugged B21 that takes turns, synchronous cog belt 22, servomotor 23, motor fixing plate 24 and two blackbody radiation source outside framework 26; Two blackbody radiation source controllers 2 comprise temperature controller 27, power supply 28, and VMOS pipe 29, DC fan 30, toggle switch 31 and controller outside framework 32 is characterized in that:
The structure of described pair of blackbody radiation source 1 is: radiation source panel 6 is fixed on the radiating surface support 5 by the screw of the left and right sides, being lined with heat insulating washer 8 between the two disturbs to prevent heat, 9 semiconductor chilling plates of evenly arranging 9 are close in radiation source panel 6 rear surfaces, semiconductor chilling plate 9 rear surfaces are close on the heating radiator 10, heating radiator 10 is fixed by screws in the back side of radiation source panel 6, and compress simultaneously semiconductor chilling plate 9, radiator bearer 11 is fixed on the back side of heating radiator 10 by the screw of the left and right sides, ac fan 12 is vertically fixed on the radiator bearer 11 by screw, and above part is installed and formed independently blackbody radiation source component 3; 4 catoptron briquettings 15 are pressed on catoptron 14 on the catoptron liner plate 16, catoptron liner plate 16 is fixed on the reflection mirror rotation shafts 17 by the screw at back, be inserted in respectively in the bearing 18 at the reflection mirror rotation shafts two ends, and bearing 18 is nested in the catoptron housing 13, compresses by bearing (ball) cover 19; Servomotor 23 is fixed on the downside of motor fixing plate 24 by the screw of end face, motor fixing plate 24 is fixed by screws in the upper surface of catoptron housing 13; The shaft of reflection mirror rotation shafts is installed the synchronizing jugged A20 that takes turns by screw, the shaft of servomotor 23 is installed the synchronizing jugged B21 that takes turns by screw, the synchronizing jugged A20 of wheel and synchronizing jugged the wheel rely on synchronous cog belt 22 to transmit rotation between the B21, above part is installed and formed independently mirror assembly 4; Two blackbody radiation source components 3 are fixed on respectively the left and right sides of mirror assembly 4 by the screw of side, mirror assembly 4 is fixed in two blackbody radiation source outside frameworks 26 by the screw of bottom, forms two blackbody radiation sources 3;
In the described pair of blackbody radiation source controller 2: temperature controller 27 is fixed on the front panel of controller outside framework 32 by carrying bayonet socket, power supply 28, VMOS pipe 29 are fixed by screws in the controller outside framework 32, DC fan 30 is fixed by screws on the rear panel of controller outside framework 32, and toggle switch 31 is fixed by screws on the Left-Hand Panel of controller outside framework 32.Power supply 28 provides the 12V direct current for temperature controller 27, DC fan 30, servomotor 23, provides the 36V alternating current by the VMOS pipe for two blackbody radiation sources 3.
During radiation source work, be that two blackbody radiation sources 3 are set different target temperatures by temperature controller 27, temperature controller 27 sends make-and-break signal to VMOS pipe 29, VMOS pipe 29 is received the break-make that flows to two blackbody radiation source 1 electric currents behind the make-and-break signal according to signal controlling, make semiconductor chilling plate 9 carry out work by signal, accurately control the radiation temperature of blackbody radiation source 3; Behind two blackbody radiation source 3 temperature stabilizations, stir toggle switch 31 to one gears, power supply provides forward current to servomotor 23, makes catoptron 14 be in position one state, the radiation of exporting the first design temperature; Stir toggle switch 31 to two gears, power supply provides inverse current to servomotor 23, makes catoptron 14 be in the position two-state, exports the radiation of the second design temperature.
Blackbody radiation source can independently be set separately temperature, switches the infrared radiation of output by the reflection direction of controlling catoptron.Blackbody radiation source adopts aerolite as radiating surface, and semiconductor chilling plate is as the heating/refrigerating element.Semiconductor chilling plate simultaneously is close to the radiating surface rear surface, and another side is close on the finned radiator, and whole blackbody radiation source carries out heat interchange by ac fan and the external world.When blackbody radiation source need to be exported the radiation that is lower than environment temperature, temperature controller loads forward current by the VMOS pipe to semiconductor chilling plate, semiconductor chilling plate absorbs heat in the one side near radiating surface, produce heat in the one side near heating radiator, the heat of generation forces exchange by ac fan and environment on heating radiator; When blackbody radiation source need to be exported the radiation that is equal to or higher than environment temperature, temperature controller loads inverse current by the VMOS pipe to semiconductor chilling plate, semiconductor chilling plate produces heat in the one side near radiating surface, absorb heat in the one side near heating radiator, the cold of generation forces exchange by ac fan and environment on heating radiator.Two blackbody radiation source symmetries are installed on the mirror assembly, and mirror assembly comprises elliptical reflector, DC servo motor and gear train.The reflection position of catoptron is controlled by the radiation source controller, when the reflector position switch is in one grade, servomotor makes catoptron turn clockwise 90 ° to the position one by gear train, this moment, the blackbody radiation face on catoptron and the right was 45 ° of angles, the infrared radiation of output the right blackbody radiation source; When the reflector position switch is in second gear, servomotor makes catoptron be rotated counterclockwise 90 ° to the position two by gear train, this moment, the blackbody radiation face on catoptron and the left side was 45 ° of angles, the infrared radiation of output left side blackbody radiation source, and whole handoff procedure was less than 2 seconds.
Two blackbody radiation source controllers mainly comprise temperature controller, power supply, VMOS pipe and DC fan.Power supply provides the input of 36V electric current for semiconductor chilling plate, for servomotor, temperature controller and DC fan provide the input of 12V electric current.According to the self-adaptive temperature compensatory theory each blackbody radiation source is demarcated separately, temperature correction coefficient is integrated in the temperature controller, guarantee to enter the equivalent blackbody temperature T of equipment under test
eBe equal to theoretical blackbody radiation source temperature T.During equipment work, temperature controller compares the current temperature value of radiating surface and the temperature value of setting, calculate working time and the working method of semiconductor chilling plate, be converted into make-and-break signal and send to the VMOS pipe, the VMOS pipe is controlled the current switching of the semiconductor chilling plate of flowing through after receiving signal, realize the accurate temperature controlling of blackbody radiation source.
Carry out noise equivalent temperature difference when test, at first with two independently blackbody radiation source be set in different temperatures; Gathered the infrared radiation of a temperature value behind the blackbody radiation source temperature stabilization by infrared system; Stir the catoptron change-over switch on two blackbody radiation source controllers, switch to another blackbody radiation source and carry out radiant output; Infrared system gathers the infrared radiation of another temperature value; Infrared system is carried out noise equivalent temperature difference calculating according to the blackbody radiation of the different temperatures value that collects, and whole test process is succinct fast.
This patent systematic parameter is as follows:
Blackbody radiation source exit portal diameter: Φ 135mm; System works temperature range :-30 ℃ ~ 46 ℃; Blackbody radiation source design temperature scope: 10 ℃ ~ 50 ℃; Blackbody radiation source switching time is less than 2s.
This patent has following characteristics:
1. two temperature point switches fast, tests fast noise equivalent temperature difference;
2. adopt active refrigeration technology, the following infrared radiation of exportable normal temperature;
3. the blackbody radiation surface radiation is even, and temperature control is stable;
4. adopt the self-adaptive temperature compensation technique, with the Equivalent Surface emittance correction to 1 of black matrix;
5. be easy to carry about with one, be convenient to open-air the use.
Description of drawings:
Fig. 1 is the structural representation of the two blackbody radiation sources among the present invention; Wherein:
Fig. 2-A is the positive diagram of structure of the blackbody radiation source component among the present invention;
Fig. 2-B is the left diagram of structure of the blackbody radiation source component among the present invention;
Fig. 2-C is the structure of the blackbody radiation source component among the present invention diagram of bowing.
Fig. 3 is the semiconductor chilling plate distribution schematic diagram among the present invention.
Fig. 4-A is the positive diagram of the structure of the mirror assembly among the present invention; Wherein:
Fig. 4-B is the left diagram of the structure of the mirror assembly among the present invention;
Fig. 4-C is the structure of the mirror assembly among the present invention diagram of bowing;
Fig. 5 is the structural representation of the two blackbody radiation source controllers among the present invention.
Fig. 6 is the terminals subgraph of the power supply among the present invention.
Fig. 7 is the terminals subgraph of the VMOS pipe among the present invention.
Fig. 8 is the terminals subgraph of the ac fan among the present invention.
Fig. 9 is the terminals subgraph of the DC fan among the present invention.
Figure 10 is the terminals subgraph of the temperature controller among the present invention.
Figure 11 is the terminals subgraph of the temperature tube among the present invention.
Figure 12 is the terminals subgraph of the toggle switch among the present invention.
Embodiment:
The below illustrates the embodiment of this patent according to Fig. 1-Figure 12, and is described in detail.
Such as Fig. 1-shown in Figure 12, the embodiment of this patent comprises: two blackbody radiation sources 1 and two blackbody radiation source controllers 2.Because two blackbody radiation sources 1 and two blackbody radiation source controllers 2 are symmetrical structure, therefore followingly only illustrate embodiment with regard to half of its symmetrical structure.
Two blackbody radiation sources 1 comprise blackbody radiation source component 3 and mirror assembly 4.
Blackbody radiation source component 3 is vertically fixed on the mirror assembly 4 by 6 through holes 401 on the radiating surface support 5.Radiating surface support 5 is a rectangular box, and front surface is opened the circular hole of Φ 135mm, and the infrared radiation that is used for radiation source panel 6 passes through; The rear surface is close to successively and is placed with heat insulating washer 8, radiation source panel 6.Heat insulating washer 8 is processed into by nylon, and profile is rectangle, and middle perforate Φ 136mm is used for the thermal isolation of radiation source panel 6 and radiating surface support 5, prevents ambient temperature jamming emitter panel 6.Radiation source panel 6 adopts aerolite to be processed into, and is a rectangular panel, and thickness is 10mm.The exit surface blasting treatment is with raising diffuse reflection efficient, and spraying high emissivity material, makes Effective Surface Emissivity up to more than 0.95, and precise finiss is carried out at the back side, and roughness reaches more than 0.8 grade.Radiation source panel 6 one side hole Φ 3mm, fill in temperature tube 7, temperature tube 7 models are PT100, buying is from RS, the connection terminal 627,628 of temperature tube 7 is connected with the connection terminal 625,627 of temperature controller 27 respectively, the actual temperature that is used for measuring radiation source panel 6, and by above-mentioned two pins with the temperature feedback that records to temperature controller 27.Between temperature tube 7 and radiation source panel 6, evenly smear heat-conducting silicone grease to improve temperature measurement accuracy.The back side of radiation source panel 6 such as the figure 9 chip semiconductor cooling pieces 9 of arranging, its specification is 9500/12/040B, buying from Hangzhou large and.9 chip semiconductor cooling pieces, 9 space 7mm arrange according to Central Symmetry.Semiconductor chilling plate 9 is used for heating and the refrigeration of radiation source panel 6: when the infrared radiation that is lower than normal temperature need to be exported in black matrix, semiconductor chilling plate 9 freezes, it is close to the one side refrigeration of radiation source panel 6, back side heating makes radiation source panel 6 carry out infrared radiation with the temperature that is lower than normal temperature; When the infrared radiation that is higher than normal temperature need to be exported in black matrix, semiconductor chilling plate 9 heated, and it is close to the one side heating of radiation source panel 6, and back side refrigeration makes radiation source panel 6 carry out infrared radiation with the temperature that is higher than normal temperature.9 chip semiconductor cooling pieces are connected in series, and by the work of 36V direct-current drive, its connection terminal 601 links to each other with the connection terminal 603 of power supply 28, and connection terminal 602 links to each other with the connection terminal 611 of VMOS pipe 29.Smear thinly one deck heat-conducting silicone grease between semiconductor chilling plate 9 and the radiation source panel 6, to improve heat transfer efficiency.Semiconductor chilling plate 9 back held against heat sink 10, heating radiator 10 is finned radiator, adopts aluminium alloy to be processed into, its substrate is rectangle, thick 10mm, the 7mm long 165mm that arranges uniformly-spaced on substrate, wide 3mm, the fin of high 64mm.Smear thinly one deck heat-conducting silicone grease between heating radiator 10 and the semiconductor chilling plate, to improve heat transfer efficiency.Heating radiator 10 is used for semiconductor chilling plate 9 and carries out heat interchange with the external world, prevents that semiconductor chilling plate 9 from damaging because of excess Temperature in the refrigeration situation.Radiation source panel 6 is connected by 10 through holes 402 with heating radiator 10, and compresses simultaneously semiconductor chilling plate 9.Heating radiator 10 links to each other with radiating surface support 5 with radiator bearer 11 by through hole 403.Radiator bearer 11 is a U-shaped thin plate, adopts the thick aluminium alloy of 2mm to be processed into.It is connected in ac fan 12 by 4 through holes 404 on the ac fan 12, and the fan model is SJ1738HA2, and buying is three huge from Taiwan.Ac fan 12 carries out air-cooled cooling for heating radiator 10, and it is driven by the 220V alternating current, and its connection terminal 615,616,617 links to each other with the connection terminal 607,608,609 of power supply 28 respectively.Whole blackbody radiation source component 3 is a separate part, but works alone and integral disassembly, assembly, conveniently carries out maintain and replace.
Mirror assembly 4 is used for the infrared radiation that blackbody radiation source is specified in output.The material of catoptron 14 is K9 glass, is the elliptic plane catoptron of a major axis 215mm, minor axis 153mm, and thickness is 15mm.At a side coating reflectance coating, reflectivity is more than 0.95.Catoptron 14 is driven by servomotor 23, switches the blackbody radiation source of output by rotating mirror.Catoptron 14 is pressed on the catoptron liner plate 16 by 4 catoptron briquettings 15, and the catoptron briquetting links to each other with catoptron liner plate 16 by through hole 405.Catoptron briquetting 15 profiles are L-type, are processed into by aluminium alloy, and liner has felt between itself and the catoptron 14, and catoptron 14 prevents from crushing.Catoptron liner plate 16 is an oval thin plate, adopts aluminium alloy to process, and is used for reinforcing catoptron 14, improves rigidity.Catoptron liner plate 16 backs are connected by through hole 407 with reflection mirror rotation shafts 17, and the reflecting surface of the axle center of reflection mirror rotation shafts 17 and catoptron 14 coincides, and can not cause because axis of rotation does not overlap image drift when guaranteeing to rotate.Reflection mirror rotation shafts 17 adopts No. 45 steel to be processed into, and it is shaped as U-shaped, and rotating shaft is stretched out at two ends, and the rotating shaft diameter is Φ 10mm.The rotating shaft two ends are nested in respectively in the endoporus of two bearings 18.Bearing 18 models are 7200AC, and buying is from Harbin Bearing Factory, and the moment of friction that produces when it can greatly reduce to rotate also improves rotation precision.The outside of following bearing 18 is nested in the bottom endoporus of catoptron housing 13, and top bearing is nested in the top endoporus of catoptron housing 13, compresses by bearing (ball) cover 19.Catoptron housing 13 adopts the aluminium alloy processing and splicings to form, and is a rectangle support, inner stationary mirror rotating shaft 17 and servomotor 23 and the gear train of being used for, outside being used for and being fixedly connected with of blackbody radiation source 3.The shaft of reflection mirror rotation shafts 17 and the synchronizing jugged A20 of wheel fix, and servomotor 23 shafts and the synchronizing jugged B21 of wheel fix, and the synchronizing jugged A20 of wheel and the synchronizing jugged B21 that takes turns are by synchronous cog belt 22 transmissions.Wherein the synchronizing jugged A20 of wheel is 38 teeth, and modulus 1.0, the synchronizing jugged B21 of wheel are 19 teeth, modulus 1.0, and synchronous cog belt 22 is high 5mm, the belt of girth 200mm is all purchased from RS for above three.Servomotor 23 is connected with catoptron housing 13 by the through hole 407 of motor fixing plate 24.Servo motor model number PD-140, buying is from MAXON.Its connection terminal 633,634 links to each other with the connection terminal 631,632 of toggle switch 31.Plugged, after the order of transmission forward rotation, servomotor 23 turns clockwise 90 °, driving the synchronizing jugged B21 of wheel rotates simultaneously, by synchronous cog belt 22 rotation is delivered on the synchronizing jugged A20 of wheel, drives reflection mirror rotation shafts 16 and rotate, finally drive catoptron 14 and clockwise rotate 90 °; After sending the backward rotation order, servomotor 23 is rotated counterclockwise 90 °, drives catoptron 14 and rotates counterclockwise 90 °, switches the blackbody radiation source component 3 of output.Install tensioning briquetting 25 because synchronous cog belt 22 distortion affects the transmission effect additional in motor fixing plate 24 both sides afterwards for preventing from working long hours, it is L-type, and the employing aluminium alloy processes.End face in long section is opened hole 408, is used for fixing with catoptron housing 13, and the end face of a shorter end is opened threaded hole 409, holds out against motor fixing plate 24 by screw, and the tensioning synchronous cog belt prevents that it is loosening because distortion produces.
Blackbody radiation source component 3 is fixing by through hole 401 with mirror assembly 4, and mirror assembly 4 fixes two blackbody radiation sources of complete, its long 500mm, wide 350mm, high 350mm by through hole 410 and two blackbody radiation source outside frameworks 26.
2 pairs of two blackbody radiation sources 1 of two blackbody radiation source controllers are powered and temperature control.Its core parts are for adopting the temperature controller 27 of adaptive equalization technology, and its connection terminal 620,621 is connected with the connection terminal 605,606 of power supply 28, obtains the 12V power supply from power supply 28; Connection terminal 622,623,624 connect respectively the connection terminal 612,613,614 of VMOS pipe 29, and the temperature value that temperature controller 27 provides according to temperature tube 7 calculates working time and the working method of semiconductor chilling plate 9 and is converted to make-and-break signal and sends to VMOS pipe 29.The connection terminal 610 of VMOS pipe 29 is connected with the connection terminal 604 of power supply 28, and connection terminal 611 is connected with the connection terminal 602 of semiconductor chilling plate 9.VMOS pipe 29 receives behind the make-and-break signal according to the break-make of signal controlling through excess current, and then the current switching of control semiconductor chilling plate 9, realizes the accurate temperature controlling of radiation source panel 6.Temperature controller 27 is connected with controller outside framework 32 by the bayonet socket that carries, and VMOS pipe 29 is connected with controller outside framework 32 by through hole 411.Be the rotating of control servomotor, at controller outside framework 31 toggle switch 31 be installed, buying is from RS, its connection terminal 629,630 is connected with the connection terminal 605,606 of power supply 28 respectively, connection terminal 631,632 is connected with the connection terminal 633,634 of servomotor 23.When switch was in one grade, catoptron forwarded position one clockwise to; When switch was in second gear, catoptron forwarded position two counterclockwise to, wherein position one and 90 ° of position two angles, the respectively output angle of two blackbody radiation sources of correspondence.Power supply 28 models are VE-NVJ-IM, and buying is from U.S. VICORPOWER, and it receives the 220V alternating current and is converted into 12V and the output of 36V direct current, and power is 600W, be responsible for servomotor 23, and temperature controller 27, VMOS pipe 29 provides the 12V direct current; Provide the 36V direct current to semiconductor chilling plate 9.Power supply 28 is connected with controller outside framework 32 by 6 through holes 412.For preventing from working long hours rear power supply heating protection, the DC fan 30 that two diameter 70mm are installed at the power supply rear side is dispelled the heat, and its specification is SJ7020HD1, and buying is three huge from Taiwan.DC fan 30 connection terminals 618 and 619 respectively with the connection terminal 605 and 606 of power supply, being connected is connected with controller outside framework 32 by 4 through holes 413.
The long 300mm of two blackbody radiation source controllers, wide 320mm, high 180mm.
Usually the emissivity of area blackbody radiation source self is less than 1, and for two blackbody radiation sources, the reflectivity of its catoptron is also less than 1.By the research to the heat radiation theory, the radiation that enters equipment under test is comprised of two parts: the radiation of (1) plane mirror self, (2) plane mirror is to the radiation of extend blackbody, and the radiation of extend blackbody comprises self radiation and its to external world reflection of environmental radiation.The environmental radiation here represents with the blackbody radiation of environment temperature Ta.So the radiation power that equipment under test receives is:
P＝(ε
1σT
4+(1-ε
1)σT
a 4)×(1-ε
2)+ε
2σT
a 4＝σT
a 4 （1）
In the formula, ε
1, T is slin emissivity and the temperature of extend blackbody self;
ε
2, Ta is self emissivity and temperature of plane mirror.
Simultaneously, the reflectivity s of extend blackbody
1=1-ε
1
The reflectivity s of plane mirror
2=1-ε
2,
Then formula (1) can be rewritten into:
By formula (1) as seen,
Work as T=T
aThe time, T
e=T
a=T; As T＜T
aThe time, T
e＜T; As T＞T
aThe time, T
e＞T.
Got by formula (2)
For making equivalent blackbody temperature equal blackbody temperature T, must repair the temperature T that extend blackbody is set
Just; Simultaneously, consider environment temperature over time, modified value s
cFor:
With this modified value s
cBe integrated into the equivalent blackbody temperature T that guarantees to enter equipment under test in the temperature controller with this
eBe equal to theoretical blackbody radiation source temperature T.
Claims (4)
1. two blackbody radiation sources in large source of a normal temperature, it comprises two blackbody radiation sources (1) and two blackbody radiation source controller (2), wherein two blackbody radiation sources (1) comprise radiating surface support (5), radiation source panel (6), heat insulating washer (8), semiconductor chilling plate (9), heating radiator (10), radiator bearer (11), ac fan (12), catoptron housing (13), catoptron (14), catoptron briquetting (15), catoptron liner plate (16), reflection mirror rotation shafts (17), bearing (18), bearing (ball) cover (19), the synchronizing jugged A(20 that takes turns), the synchronizing jugged B(21 that takes turns), synchronous cog belt (22), servomotor (23), motor fixing plate (24) and two blackbody radiation source outside framework (26); Two blackbody radiation source controllers (2) comprise temperature controller (27), power supply (28), and VMOS manages (29), DC fan (30), toggle switch (31) and controller outside framework (32) is characterized in that:
The structure of described pair of blackbody radiation source (1) is: radiation source panel (6) is fixed on the radiating surface support (5) by the screw of the left and right sides, being lined with heat insulating washer (8) between the two disturbs to prevent heat, 9 semiconductor chilling plates of evenly arranging (9) are close in radiation source panel (6) rear surface, semiconductor chilling plate (9) rear surface is close on the heating radiator (10), heating radiator (10) is fixed by screws in the back side of radiation source panel (6), and compress simultaneously semiconductor chilling plate (9), radiator bearer (11) is fixed on the back side of heating radiator (10) by the screw of the left and right sides, ac fan (12) is vertically fixed on the radiator bearer (11) by screw, and above part is installed and formed independently blackbody radiation source component (3); 4 catoptron briquettings (15) are pressed on catoptron (14) on the catoptron liner plate (16), catoptron liner plate (16) is fixed on the reflection mirror rotation shafts (17) by the screw at back, be inserted in respectively in the bearing (18) at the reflection mirror rotation shafts two ends, bearing (18) is nested in the catoptron housing (13), compresses by bearing (ball) cover (19); Servomotor (23) is fixed on the downside of motor fixing plate (24) by the screw of end face, motor fixing plate (24) is fixed by screws in the upper surface of catoptron housing (13); The shaft of reflection mirror rotation shafts is installed the synchronizing jugged A(20 that takes turns by screw), the shaft of servomotor (23) is installed the synchronizing jugged B (21) that takes turns by screw, the synchronizing jugged A(20 of wheel) and the synchronizing jugged B(21 of wheel) between rely on synchronous cog belt (22) transmit to rotate, above part is installed and is formed independently mirror assembly (4); Two blackbody radiation source components (3) are fixed on respectively the left and right sides of mirror assembly (4) by the screw of side, mirror assembly (4) is fixed in two blackbody radiation source outside frameworks (26) by the screw of bottom, forms two blackbody radiation sources (3);
In the described pair of blackbody radiation source controller (2): temperature controller (27) is fixed on the front panel of controller outside framework (32) by carrying bayonet socket, power supply (28), VMOS pipe (29) are fixed by screws in the controller outside framework (32), DC fan (30) is fixed by screws on the rear panel of controller outside framework (32), and toggle switch (31) is fixed by screws on the Left-Hand Panel of controller outside framework (32).Power supply (28) is temperature controller (27), DC fan (30), servomotor (23) provides the 12V direct current, is that two blackbody radiation sources (3) provide the 36V alternating current by the VMOS pipe;
During radiation source work, be that two blackbody radiation sources (3) are set different target temperatures by temperature controller (27), temperature controller (27) sends make-and-break signal to VMOS pipe (29), VMOS pipe (29) is received the break-make that flows to two blackbody radiation source (1) electric currents behind the make-and-break signal according to signal controlling, make semiconductor chilling plate (9) carry out work by signal, accurately control the radiation temperature of blackbody radiation source (3); Behind two blackbody radiation sources (3) temperature stabilization, stir toggle switch (31) to a gear, power supply provides forward current to servomotor (23), makes catoptron (14) be in position one state, the radiation of exporting the first design temperature; Stir toggle switch (31) to two gears, power supply provides inverse current to servomotor (23), makes catoptron (14) be in the position two-state, exports the radiation of the second design temperature.
2. two blackbody radiation sources in large source of a kind of normal temperature according to claim 1, it is characterized in that: described radiation source panel (6) surface spraying high emissivity material, Effective Surface Emissivity reaches more than 0.95.
3. two blackbody radiation sources in large source of normal temperature according to claim 1, it is characterized in that: described semiconductor chilling plate (9) is 39.7 * 39.7 * 4.16mm, rated voltage 12V, refrigeration work consumption 38W.
4. the two blackbody radiation sources in large source of a kind of normal temperature according to claim 1 is characterized in that: described heating radiator (10) adopts aerolite processing, the thick 10mm of substrate, and the long 165mm of fin, wide 3mm, high 64mm, interval 7mm evenly distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220207545 CN202661174U (en) | 2012-05-09 | 2012-05-09 | Normal-temperature large-surface-source double-blackbody radiation source |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680108A (en) * | 2012-05-09 | 2012-09-19 | 中国科学院上海技术物理研究所 | Normal-temperature large-surface-source double-blackbody radiation source for field application |
| CN106289729A (en) * | 2016-08-31 | 2017-01-04 | 电子科技大学 | A kind of Terahertz or infrared focal plane detector Auto-Test System and method |
| CN116625528A (en) * | 2023-07-25 | 2023-08-22 | 南京理工大学 | Design method and system application of large dynamic range infrared radiation source test system |
-
2012
- 2012-05-09 CN CN 201220207545 patent/CN202661174U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102680108A (en) * | 2012-05-09 | 2012-09-19 | 中国科学院上海技术物理研究所 | Normal-temperature large-surface-source double-blackbody radiation source for field application |
| CN106289729A (en) * | 2016-08-31 | 2017-01-04 | 电子科技大学 | A kind of Terahertz or infrared focal plane detector Auto-Test System and method |
| CN116625528A (en) * | 2023-07-25 | 2023-08-22 | 南京理工大学 | Design method and system application of large dynamic range infrared radiation source test system |
| CN116625528B (en) * | 2023-07-25 | 2023-10-31 | 南京理工大学 | Design method and system application of large dynamic range infrared radiation source test system |
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