CN205280213U - Artifical target of down long wave radiation measurement of atmosphere - Google Patents
Artifical target of down long wave radiation measurement of atmosphere Download PDFInfo
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Abstract
The utility model provides an artifical target of down long wave radiation measurement of atmosphere, this artifical target of down long wave radiation measurement of atmosphere include target body, temperature measuring system and major control system, and temperature measuring system connects the temperature of target body and measurement target drone body, and major control system connects temperature measuring system, show with storage measuring temperature data, wherein, the capable M of N that the target body formed for the individual seamless concatenation of sub - target of N M is listed as the target array, the utility model discloses a problem of the inconvenient transportation of target has by a large scale been avoided in the transportation of artifical target convenience, has improved the down long wave radiation value's of atmosphere measurement accuracy, has reduced measuring error, has reduced the cost of artifical target by a wide margin, can not only satisfy the nearly distance measurement in ground, can also be applicable to the infrared load calibration that aerial working platform, airborne platform and balloon platform carried.
Description
Technical Field
The utility model relates to a remote sensing technical field, in particular to down long wave radiometric artificial target of atmosphere.
Background
The radiation of a thermal infrared band (8-14 mu m) received by the satellite sensor mainly comes from the self radiation of the earth surface, the upward long-wave radiation of the atmosphere and the downward long-wave radiation of the atmosphere. The atmospheric transmittance, the atmospheric uplink and downlink long-wave radiation jointly form the influence of the atmosphere on the thermal infrared remote sensing. The atmospheric downward long-wave radiation refers to the self-radiation of the atmosphere and the part of the scattered long-wave radiation reaching the ground downwards. In the field of quantitative thermal infrared remote sensing, atmospheric downlink long-wave radiation is one of key factors for inversion of surface temperature and emissivity. In addition, as one of the main sources of the surface long-wave radiation, the acquisition of the atmospheric downlink radiation has important significance for the research on the aspects of surface radiation balance, climate change, global warming and the like.
At present, four main methods are mainly used for obtaining the atmospheric downlink long-wave radiation, firstly, the atmospheric profile data is synchronously obtained by utilizing a sounding balloon, and the sounding data is input into an atmospheric radiation transmission model to calculate the atmospheric downlink long-wave radiation; secondly, calculating the downward long-wave radiation of the atmosphere by actually measuring atmospheric parameters such as the moisture content of the atmosphere and the like and utilizing an empirical statistical relationship; thirdly, directly inverting the downward long-wave radiation of the atmosphere by utilizing the self information of the image; and fourthly, directly obtaining the field measurement with the assistance of a gold-plated diffuse reflection plate by an infrared radiometer. The field measurement is the most direct and accurate means for acquiring the long-wave radiation under the atmosphere.
In the method for acquiring the downlink long-wave radiation of the atmosphere, the problem that the target can be deviated due to the influence of wind in the ascending process of the sounding balloon exists in the first method, the sounding balloon generally takes about 1 hour to survey the whole atmosphere, and the satellite/airplane has instantaneity in earth observation and is difficult to meet the synchronization requirement; the second method and the third method have the main defects that the errors of the empirical statistical relationship and the inversion method are large, and the quantitative application requirements of the thermal infrared remote sensing are difficult to meet; the method can instantly acquire high-precision atmospheric downlink long-wave radiation at the transit time of the satellite/airplane, but as is well known, the diffuse reflection gold plate used in the current test process is small in size (10 cm) and very expensive, and can only meet the ground short-distance (1 m) measurement. With the rapid development of the earth observation technology in China, the requirement for replacing and calibrating the aviation and aerospace remote sensing load sites is higher and higher, and the conventional diffuse reflection gold plate with a small area cannot meet the application requirement.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of this, the utility model discloses a main aim at provides a long wave radiometric artificial target under atmosphere, and its area is big, has good diffusion characteristic and the flat characteristic of spectrum, is applicable to the infrared load calibration that aerial working platform, airborne platform or balloon platform carried on.
(II) technical scheme
The invention provides an atmospheric downlink long-wave radiometric artificial target, which comprises a target body 11; the target body 11 is an N-row M-column target array formed by N × M sub-targets 12 through seamless splicing, wherein each sub-target 12 comprises a sub-target body 13 and four target supporting legs 14, N, M is a natural number greater than 1, the sub-target body 13 is a rectangular aluminum alloy plate with a length of a and a width of b, the upper surface of the sub-target body 13 is provided with a transparent aluminum oxide coating with low emissivity, four liftable target supporting legs 14 are mounted at four top corners of the back of the sub-target body 13, and a and b are greater than or equal to 1M.
Preferably, the method further comprises the following steps: a temperature measurement system; the temperature measurement system includes: the temperature measuring resistors are arranged on the back surfaces of all or part of the sub-target bodies 13, and the number of the temperature measuring resistors on the back surfaces of all the sub-target bodies 13 is the same or different.
Preferably, K temperature measuring resistors are arranged on the back surface of one of the sub-target bodies 13, the sub-target 12 further includes K temperature measuring resistor protection cover plates 15, the K temperature measuring resistor protection cover plates are symmetrically arranged by taking the middle point of the back surface of the sub-target body 13 as the center, or symmetrically arranged by taking the center line of the back surface of the sub-target body 13 as the axis, or symmetrically arranged on the back surface of the sub-target body 13 by taking the diagonal line of the back surface of the sub-target body 13 as the axis, the K temperature measuring resistors are respectively located in the K temperature measuring resistor protection cover plates 15, and K is a natural number.
Preferably, the target supporting leg 14 comprises a fixing column 18 and an adjusting screw rod 19, the top end of the fixing column 18 is installed on the sub-target body 13, the height of the vertex angle of the sub-target body 13 is adjusted through the adjusting screw rod 19, the height adjusting range of the target supporting leg 14 is 0-50 mm, and the overall flatness of the target body 11 is superior to 10 mm.
Preferably, the temperature measuring system also comprises a main control system, wherein the main control system is connected with the temperature measuring system and used for displaying and storing measured temperature data; the temperature measuring system comprises a temperature collecting unit 21, the temperature collecting unit 21 calculates a temperature value corresponding to each temperature measuring resistor, and an average value of the temperature values corresponding to the temperature measuring resistors is used as a temperature value of the artificial target.
Preferably, the artificial target for atmospheric downlink long-wave radiometric measurement further comprises sub-target connecting pieces, each sub-target connecting piece comprises two corner connecting pieces 31 and four corner connecting pieces 32, each of the four corners of the sub-target body 13 is provided with a group of through holes 33, the two corner connecting pieces 31 are inserted into a group of through holes 33 corresponding to the adjacent corners of the two adjacent sub-targets 12, the two corner connecting pieces 31 are fixed by nuts, the four corner connecting pieces 32 are inserted into a group of through holes 33 corresponding to the adjacent corners of the four adjacent sub-targets 12, and the four corner connecting pieces 32 are fixed by nuts.
Preferably, the sub-target 12 further includes a contact element and a contact element holder 16, the contact element holder 16 is disposed on one edge of the back surface of the sub-target body 13, the contact element is mounted in the contact element holder 16, cables connected to the K temperature measuring resistors of each sub-target body 13 are all connected to the contact element of the sub-target 12, and the cables led out from the contact element are connected to the temperature acquisition unit 21.
Preferably, the atmospheric downlink long-wave radiometric artificial target further comprises aluminum foil paper, which is laid along the periphery of the target body 11.
Preferably, the atmospheric downlink long-wave radiometric artificial target further comprises a lining net, wherein the lining net is laid on the ground below the target body 11, and the area of the lining net is larger than or equal to that of the target body 11.
Preferably, the sub-target body 13 is a square aluminum alloy plate with the side length of 1M, N and M are 4, the target body 11 is a 4-row 4-column target array formed by 16 sub-targets 12 in a seamless splicing manner, the side length of the target body 11 is 4M, and the area of the target body 11 is 16M2And K is 2, wherein 1 temperature measuring resistor protection cover plate 15 is arranged at the middle point of the back surface of the sub-target body 13, and the other 1 temperature measuring resistor protection cover plate is arranged near 1 vertex angle of the back surface.
(III) advantageous effects
According to the above technical scheme, the utility model discloses following beneficial effect has:
(1) The target body is formed by seamlessly splicing NxM sub-targets, the sub-targets are convenient to transport, and the problem that the large-area targets are inconvenient to transport is solved;
(2) the upper surface of the sub-target body is provided with the transparent alumina coating with low emissivity, the surface emissivity of the target is low, the ultraviolet resistance is good, the spectrum is flat, the Lambert property is good, the environment is stable, the combination of the film layer and the substrate is firm, the measurement precision of the long-wave radiation value under the atmosphere is improved, and the measurement error is reduced;
(3) the aluminum alloy material is adopted, so that the cost of the artificial target is greatly reduced;
(4) the large-area target body can meet ground short-distance measurement and is also suitable for infrared load calibration carried by an aerial work platform, an airborne platform and a balloon platform;
(5) the flatness of the sub-target body can be adjusted by the target supporting legs, the temperature measuring resistor is protected by the temperature measuring resistor protecting cover plate, the average value of a plurality of temperature measuring resistor values is used as the temperature value of the artificial target, the connecting piece fixedly connects adjacent sub-targets and keeps the whole of the artificial target flat, the measuring error is further reduced, and the measuring precision is improved.
Drawings
Fig. 1 is a front view of a target body of an atmospheric downlink long-wave radiometric artificial target according to an embodiment of the present invention;
Fig. 2 is a back view of a target body of the atmospheric downlink long-wave radiometric artificial target according to the embodiment of the present invention;
fig. 3 is a front view of a sub-target of an embodiment of the present invention;
fig. 4 is a back view of a sub-target of an embodiment of the present invention;
fig. 5 is a structural diagram of a target supporting foot of the embodiment of the present invention;
fig. 6 is the temperature measurement system and the main control system schematic diagram of the atmospheric downlink long wave radiometric artificial target of the embodiment of the present invention.
[ notation ] to show
11-a target entity; 12-child target; 13-daughter target entity; 14-target-supporting feet; 15-temperature measuring resistor protection cover plate; 16-a contact holder; 18-fixed column; 19-adjusting the screw;
21-a temperature acquisition unit; 22-a master control computer;
31-two corner connectors; 32-four corner connectors; 33-through holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
The utility model provides a down long wave radiometric artificial target of atmosphere, this down long wave radiometric artificial target of atmosphere measurement accuracy is high, the size is big, with low costs, not only can be used to ground closely to measure, still is applicable to remote measurements such as aviation, space flight.
As the atmospheric downlink long-wave radiation is one of the key factors for inversion of the surface temperature and the incidence, the method has important significance for the research of surface radiation balance, climate change and global warming, the measurement of the atmospheric downlink long-wave radiation value is an important research subject in the field of remote sensing, and the measurement principle of the atmospheric downlink long-wave radiation is as follows: under the cloudless condition, assuming that the atmospheric level is uniform and isotropic, and the scattering effect of the atmosphere is not considered, the long-wave infrared radiation transmission equation can be written as follows:
Lsensor＝τ·[λ·B(TS，λ)+(1-λ)·Latm↓]+Latm↑(1)
wherein L issensorIs the entrance pupil radiance, L, of the infrared sensoratm↓And Latm↑Is the long-wave radiation going down the atmosphere and the long-wave radiation going up the atmosphere, tau is the atmospheric transmission rate of the path from the target to the infrared sensor, TSIs the temperature of the object to be measured,λis the target emissivity, which is wavelength dependent, λ is the wavelength, B is the Planck function, which is the targetThe target temperature is related to the wavelength.
When the infrared sensor is observed on the surface layer, the atmospheric transmittance tau of the distance between the surface layer and the sensor is considered as 1, the upward long-wave radiation of the atmosphere is 0, and the entrance pupil radiation brightness L of the infrared sensor on the surface layer at the momentsurfCan be simplified as follows:
Lsurf＝λ·B(TS，λ)+(1-λ)Latm↓(2)
as can be seen from the formula (2), the calculation formula of the atmospheric downlink long-wave radiation based on the artificial target can be written as follows:
Latm↓＝[Lsurf-λ·B(TS，λ)]/(1-λ)(3)
in actual measurement, using an artificial target as a target, T SIs the temperature of the surface of the artificial target,λemissivity of the surface of the artificial target, LsurfThe radiation value L of long wave under atmosphere can be obtained by formula (3) for directly measuring the radiation value by an infrared radiometer or an infrared imageratm↓。
The utility model discloses artifical target of long wave radiometric measurement under atmosphere, including target body 11, temperature measurement system and major control system, temperature measurement system connects target body 11 for measure the temperature of target body 11, major control system connects temperature measurement system, is used for demonstration and storage measuring temperature data.
The target body 11 is an N-row M-column target array formed by seamlessly splicing nxm sub-targets 12, wherein each sub-target 12 comprises a sub-target body 13, four target supporting legs 14 and N, M are natural numbers larger than 1, wherein,
the sub-target body 13 is a rectangular aluminum alloy plate with the length of a and the width of b, the upper surface of the sub-target body 13 is provided with a transparent aluminum oxide coating with low emissivity, four liftable target supporting feet 14 are installed at four top corners of the back surface of the sub-target body 13, and a and b are larger than or equal to 1 m.
The aluminum alloy sub-target body 13 greatly reduces the cost of the artificial target, the side length of the sub-target body 13 is larger than 1m, the size of the target body 11 is greatly increased, the large-area target body 11 can meet ground short-distance measurement, and can be suitable for infrared load calibration carried by an aerial work platform, an airborne platform and a balloon platform, the sub-target 12 is convenient to transport, and the problem of inconvenient transportation of the large-area target is avoided.
The surface reflectivity of the transparent alumina coating of the sub-target body 13 is more than 0.8, the emissivity is 0.1-0.2, the ultraviolet resistance is good, the spectrum is flat, the Lambert property is good, the environment is stable, and the combination of the film layer and the substrate is firm. As can be seen from the formula (3), the emissivity of the surface of the artificial targetλThe smaller the radiation value L, the longer the radiation value Latm↓The smaller the error is, the higher the precision is, the emissivity of the surface of the artificial target is assumedλFor 0, then atmospheric downlink long wave radiation equals with surface layer sensor entrance pupil radiance, and infrared radiometer or infrared imager measured value are atmospheric downlink long wave radiation value promptly, consequently, the utility model discloses an artificial target of transparent alumina coating with low emissivity can improve atmospheric downlink long wave radiation value's measurement accuracy, reduces measuring error.
The four target supporting feet 14 on the back of the sub-target body 13 can adjust the flatness of the sub-target body 13, the whole target body 11 is guaranteed to be flat by leveling the sub-target body 13, measuring errors caused by unevenness of the target in the process of measuring the long-wave radiation value in the atmosphere are further reduced, and measuring accuracy is improved, wherein the height adjustable range of the target supporting feet 14 is 0-50 mm, so that the integral flatness of the target body 11 is better than 10 mm.
In another embodiment of the present invention, the sub-target 12 further includes K temperature measuring resistor protective cover plates 15, which are symmetrically disposed on the back of the sub-target body 13, and K is a natural number greater than 3. The K temperature measuring resistor protection cover plates 15 can be symmetrically arranged on the back of the sub-target body 13 by adopting one of the following three modes: the middle point of the back of the sub-target body 13 is used as the center for symmetrical arrangement, the middle line of the back of the sub-target body 13 is used as the axial symmetry, and the diagonal lines of the back of the sub-target body 13 are used as the axial symmetry, K temperature measuring resistor protection cover plates 15 are adhered to the back of the sub-target body 13 through epoxy glue and used for protecting the temperature measuring resistors of the temperature measuring system, the temperature measuring resistors are prevented from generating errors due to the influence of the surrounding environment, the measurement precision of the atmospheric long-wave radiation value is further improved, and the measurement errors are reduced.
In another embodiment of the present invention, the sub-target 12 further includes a contact member and a contact member holder 16, the contact member holder 16 is disposed on one of the edges of the back surface of the sub-target body 13, and the contact member is installed in the contact member holder 16.
Fig. 1 and 2 show the front and back of the target body 11 in the above embodiment, and fig. 3 and 4 show the front and back of the sub-target 12 in the embodiment of the present invention. Wherein, a ═ b ═ 1m, the sub-target body 13 is a square aluminum alloy plate with a side length of 1 m; the target body 11 is a 4-row 4-column target array formed by 16 sub-targets 12 in a seamless splicing manner, the side length of the target body 11 is 4M, and the area is 16M 2(ii) a K is 2, wherein 1 temperature measuring resistor protection cover plate 15 is arranged at the middle point of the back surface of the sub-target body 13, the other 1 temperature measuring resistor protection cover plate is arranged near four vertex angles of the back surface, and one end of each side surface of the temperature measuring resistor protection cover plate 15 is openAnd the upper opening of the cover plate faces the back surface of the sub-target body 13 and is fixed on the back surface of the sub-target body 13. Preferably, K is 5, wherein 1 temperature measuring resistor protective cover plate 15 is arranged at the middle point of the back surface of the sub-target body 13, the other 4 temperature measuring resistor protective cover plates are symmetrically arranged near 1 vertex angle of the back surface by taking the middle point of the back surface of the sub-target body 13 as the center,
fig. 5 shows the target supporting foot 14 in the above embodiment, the target supporting foot 14 includes a fixed column 18 and an adjusting screw 19, the top end of the fixed column 18 is mounted on the sub-target body 13, and the height of the top corner of the sub-target body 13 is adjusted by the adjusting screw 19, so as to level the sub-target body 13.
The utility model discloses temperature measurement system includes temperature acquisition unit 21 and N M K individual temperature measurement resistance, and K individual temperature measurement resistance symmetry sets up at every sub-target body 13 back, converts the temperature value of sub-target body 13 into the resistance, and temperature acquisition unit 21 gathers temperature measurement resistance's temperature value in real time. The temperature acquisition unit 21 comprises an amplifying circuit, a multi-channel A/D converter and a single chip microcomputer, and is connected with each temperature measuring resistor. Each temperature measuring resistor senses the temperature of the sub-target body 13, changes the temperature value into a resistance value, the resistance value change signal is converted into a voltage change signal through an amplifying circuit of the temperature acquisition unit 21 and is amplified, the multichannel A/D converter performs analog-to-digital conversion on the voltage change signal of each temperature measuring resistor, the single chip microcomputer calculates the temperature value corresponding to each temperature measuring resistor, and the average value of the temperature values corresponding to each temperature measuring resistor is used as the temperature value of the artificial target.
The embodiment of the utility model provides an adopt the average value of a plurality of temperature measurement resistance temperature values as the temperature value of artifical target, more accurate, the temperature that has comprehensively reflected artifical target, further improve the measurement accuracy of atmospheric downlink long wave radiation value, reduce measuring error.
Wherein, can adopt one of following three kinds of modes to set up K temperature measurement resistance symmetry at every sub-target body 13 back: the back surface of the sub-target body 13 is symmetrically arranged by taking the middle point of the back surface of the sub-target body 13 as a center, symmetrically arranged by taking the middle line of the back surface of the sub-target body 13 as an axis, and symmetrically arranged by taking the diagonal line of the back surface of the sub-target body 13 as an axis.
In another embodiment of the present invention, the K temperature measuring resistors are symmetrically disposed on the back of each sub-target body 13 and located in the K temperature measuring resistor protective cover 15. The cables of the K temperature measuring resistors connected with each sub-target body 13 are all connected to the contact piece of the sub-target 12, and the cables led out from the contact pieces are connected with the temperature acquisition unit 21 so as to optimize the layout and wiring of the cables of the temperature measuring system.
Wherein, the temperature measuring resistor of the temperature measuring system is a platinum resistor.
As shown in fig. 6, the 4 × 4 × 2 — 32 thermometric resistors corresponding to the artificial target in fig. 1 and 2 protect the cover plate 15, and the thermometric resistors of the temperature measurement system are 32. Preferably, if each sub-target 12 includes 5 thermometric resistance protective covers 15, the number of thermometric resistances of the temperature measurement system is 80.
As shown in fig. 6, the utility model discloses major control system adopts main control computer 22, and its connection temperature measurement system, temperature measurement system's temperature acquisition unit 21 send the temperature value of artifical target to main control computer 22, and main control computer 22 shows and stores the temperature value of artifical target in real time.
In another embodiment of the present invention, as shown in fig. 3, the atmospheric downlink long-wave radiometric artificial target further includes a sub-target connecting member for fixedly connecting the adjacent sub-targets 12 and keeping the whole artificial target flat. The sub-target connecting pieces are divided into two-corner connecting pieces 31 and four-corner connecting pieces 32, a group of through holes 33 are formed in each of four top corners of the sub-target body 13, the two-corner connecting pieces 31 are inserted into a group of through holes 33 corresponding to adjacent top corners of two adjacent sub-targets 12, the two-corner connecting pieces 31 are fixed by nuts, the four-corner connecting pieces 32 are inserted into a group of through holes 33 corresponding to adjacent top corners of four adjacent sub-targets 12, and the four-corner connecting pieces 32 are fixed by nuts, so that the sub-targets 12 are fixedly connected together by the two-corner connecting pieces 31 and the four-corner connecting pieces 32, the same flatness of the adjacent sub-targets 12 is kept, the integral flatness of the artificial target is guaranteed, therefore, the measuring error caused by uneven targets in the atmospheric long-wave radiation value measuring process is further reduced, and the measuring precision.
In another embodiment of the present invention, the atmospheric downlink long wave radiometric artificial target further includes aluminum foil paper, which is laid along the periphery of the target body 11. The aluminum foil paper is similar to the surface characteristics of the target body 11, the influence of radiation of the surrounding environment of the artificial target can be effectively reduced, the measurement error of the atmospheric long-wave radiation value is further reduced, and the measurement precision is improved.
The utility model discloses a further embodiment, the artifical target of atmospheric downlink long wave radiometric measurement still includes the lining net, and the lining net is laid on the ground of target body 11 below, and area more than or equal to target body 11 area. The lining net isolates the target body 11 from bare soil, the cleanliness of the surface of the target body 11 is kept, the measurement error of the long-wave radiation value under the atmosphere is further reduced, and the measurement precision is improved.
In another embodiment of the present invention, a method for making an atmospheric downlink long-wave radiometric artificial target is provided, which includes:
step A: and processing the aluminum alloy material into the sub-target 12.
The step A specifically comprises the following steps:
substep A1: the sub-target body 13 is machined.
The substep a1 specifically includes:
substep A1 a: carrying out stress-relief pretreatment on the aluminum alloy material, carrying out rough machining on a blank, and carrying out stress-relief annealing treatment.
Wherein, the rough machining can be rough turning, rough planing and rough milling.
Substep A1 b: and performing semi-finishing on the aluminum alloy material, and performing stress relief annealing treatment.
Wherein, the semi-finishing can be finish turning, finish grinding and finish milling.
Substep A1 c: and (3) performing finish machining on the aluminum alloy material to obtain the surface roughness requirement, and then using the aluminum alloy material as the sub-target body 13.
Wherein the finishing can be grinding, honing and ultra-finishing.
Substep A2: and (3) performing bright anodic oxidation on the surface of the sub-target body 13 to form a transparent alumina film coating.
Substep A3: the target supporting leg 14 is mounted on the sub-target body 13.
And B: the temperature measuring resistors of the temperature measuring system are symmetrically arranged on the back of the sub-target body 13 and are connected with the temperature measuring resistors, the temperature acquisition unit 21 and the main control computer 22 through cables.
And C: and leveling the sub-targets 12 at the same height, and seamlessly splicing the sub-targets 12 into a target array to form the artificial target.
In another embodiment of the present invention, step a of the manufacturing method further includes, after sub-step a 3:
substep A4: symmetrically arranging temperature measuring resistor protective cover plates 15 on the back of the sub-target body 13; and/or disposing a contact holder 16 on one of the edges of the back side of the sub-target body 13, the contact being mounted within the contact holder 16.
In another embodiment of the present invention, step B of the manufacturing method specifically includes: arranging a temperature measuring resistor of a temperature measuring system in a temperature measuring resistor protection cover plate 15 on the back of the sub-target body 13; and/or cables connected with the temperature measuring resistors of the sub-target body 13 are connected to the contact element of the sub-target 12, the cables led out from the contact element are connected with the temperature acquisition unit 21, and the temperature acquisition unit 21 is connected with the main control computer 22.
In another embodiment of the present invention, step C of the manufacturing method specifically includes: leveling the sub-targets 12 at the same height, fixedly connecting the adjacent sub-targets 12 by using sub-target connecting pieces, keeping the whole target body 11 flat, and seamlessly splicing the sub-targets 12 into a target array to form the artificial target.
In another embodiment of the present invention, the method further comprises the following step C:
step D: paving aluminum foil paper along the periphery of the target body 11; and/or laying a backing net on the ground below the target body 11.
It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. In addition, the above definitions of the components are not limited to the specific structures and shapes mentioned in the embodiments, and those skilled in the art may easily modify or replace them, for example:
(1) Other types of temperature measuring resistors can also be adopted;
(2) the temperature acquisition unit can also be realized in other modes;
(3) examples of parameters that include particular values may be provided herein, but the parameters need not be exactly equal to the corresponding values, but may be approximated to the corresponding values within acceptable error tolerances or design constraints;
(4) directional phrases used in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., refer only to the orientation of the drawings and are not intended to limit the scope of the present invention;
(5) the embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e. technical features in different embodiments may be freely combined to form further embodiments.
To sum up, the utility model provides a pair of down long wave radiometric artificial target of atmosphere, its area is big, has good diffusion characteristic and the flat characteristic of spectrum, is applicable to the infrared load calibration that aerial working platform, machine carried platform or balloon platform carried on.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An atmospheric downlink long-wave radiometric artificial target is characterized by comprising a target body (11); wherein,
the target body (11) is an N-row M-column target array formed by seamlessly splicing NxM sub-targets (12), wherein each sub-target (12) comprises a sub-target body (13) and four target supporting feet (14), N, M is a natural number larger than 1,
the sub-target body (13) is a rectangular aluminum alloy plate with the length of a and the width of b, the upper surface of the sub-target body (13) is provided with a transparent aluminum oxide coating with low emissivity, four liftable target supporting feet (14) are installed at four top corners of the back surface of the sub-target body (13), and a and b are larger than or equal to 1 m.
2. The atmospheric downlink long-wave radiometric artificial target of claim 1, further comprising: a temperature measurement system;
the temperature measurement system includes: the temperature measuring resistors are arranged on the back surfaces of all or part of the sub-target bodies (13), and the number of the temperature measuring resistors on the back surfaces of all the sub-target bodies (13) is the same or different.
3. The artificial target for atmospheric downlink long-wave radiometric measurement according to claim 2, wherein K temperature measuring resistors are disposed on the back surface of one of the sub-target bodies (13), the sub-target (12) further comprises K temperature measuring resistor protective cover plates (15) symmetrically disposed around the midpoint of the back surface of the sub-target body (13), or symmetrically disposed around the center line of the back surface of the sub-target body (13), or symmetrically disposed around the diagonal line of the back surface of the sub-target body (13), the K temperature measuring resistors are respectively disposed in the K temperature measuring resistor protective cover plates (15), and K is a natural number greater than 3.
4. The atmospheric long-wave radiometric artificial target according to claim 1, wherein the target supporting feet (14) comprise a fixed column (18) and an adjusting screw rod (19), the top end of the fixed column (18) is mounted on the sub-target body (13), the height of the vertex angle of the sub-target body (13) is adjusted through the adjusting screw rod (19), the height adjusting range of the target supporting feet (14) is 0-50 mm, and the overall flatness of the target body (11) is better than 10 mm.
5. The atmospheric downlink long-wave radiometric artificial target according to claim 2, further comprising a master control system, wherein the master control system is connected with the temperature measuring system, and displays and stores measured temperature data; the temperature measuring system comprises a temperature collecting unit (21), the temperature collecting unit (21) calculates the temperature value corresponding to each temperature measuring resistor, and the average value of the temperature values corresponding to the temperature measuring resistors is used as the temperature value of the artificial target.
6. The atmospheric downlink long-wave radiometric artificial target according to claim 1, characterized in that the atmospheric downlink long-wave radiometric artificial target further comprises sub-target connectors, each sub-target connector comprises two corner connectors (31) and four corner connectors (32), each of the four corners of the sub-target body (13) is provided with a set of through holes (33), the two corner connectors (31) are inserted into a corresponding set of through holes (33) of the adjacent corners of the two adjacent sub-targets (12), the two corner connectors (31) are fixed by nuts, the four corner connectors (32) are inserted into a corresponding set of through holes (33) of the adjacent corners of the four adjacent sub-targets (12), and the four corner connectors (32) are fixed by nuts.
7. The atmospheric downlink long-wave radiometric artificial target according to claim 4, characterized in that the sub-target (12) further comprises a contact element and a contact element holder (16), the contact element holder (16) is arranged on one of the edges of the back surface of the sub-target body (13), the contact element is installed in the contact element holder (16), cables connecting the K thermometric resistors of each sub-target body (13) are connected to the contact element of the sub-target (12), and the cables led out from the contact elements are connected with the temperature acquisition unit (21).
8. The atmospheric long-wave radiometric artificial target according to claim 1, characterized in that it further comprises aluminium foil paper laid along the perimeter of the target body (11).
9. The atmospheric long-wave radiometric artificial target according to claim 1, characterized in that, the atmospheric long-wave radiometric artificial target further comprises a lining net, the lining net is laid on the ground under the target body (11), and the area of the lining net is larger than or equal to the area of the target body (11).
10. The method of claim 3The atmospheric downlink long-wave radiometric artificial target is characterized in that a sub-target body (13) is a square aluminum alloy plate with the side length of 1M, 4 are taken from N and M, a target body (11) is a 4-row 4-column target array formed by seamlessly splicing 16 sub-targets (12), the side length of the target body (11) is 4M, and the area of the target body (11) is 16M 2And K is 2, wherein 1 temperature measuring resistor protection cover plate (15) is arranged at the middle point of the back surface of the sub-target body (13), and the other 1 temperature measuring resistor protection cover plate is arranged near 1 vertex angle of the back surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521130349.3U CN205280213U (en) | 2015-12-31 | 2015-12-31 | Artifical target of down long wave radiation measurement of atmosphere |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521130349.3U CN205280213U (en) | 2015-12-31 | 2015-12-31 | Artifical target of down long wave radiation measurement of atmosphere |
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| CN205280213U true CN205280213U (en) | 2016-06-01 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509896A (en) * | 2015-12-31 | 2016-04-20 | 中国科学院光电研究院 | Manual target for measuring downward atmospheric long-wave radiation and method for producing same |
| CN114153247A (en) * | 2021-10-14 | 2022-03-08 | 西安现代控制技术研究所 | Low-cost non-contact constant temperature difference control system |
-
2015
- 2015-12-31 CN CN201521130349.3U patent/CN205280213U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509896A (en) * | 2015-12-31 | 2016-04-20 | 中国科学院光电研究院 | Manual target for measuring downward atmospheric long-wave radiation and method for producing same |
| CN114153247A (en) * | 2021-10-14 | 2022-03-08 | 西安现代控制技术研究所 | Low-cost non-contact constant temperature difference control system |
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