CN111766213B - Unmanned aerial vehicle-mounted infrared spectrometer spectrum radiation online calibration method and device - Google Patents
Unmanned aerial vehicle-mounted infrared spectrometer spectrum radiation online calibration method and device Download PDFInfo
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- CN111766213B CN111766213B CN202010635091.1A CN202010635091A CN111766213B CN 111766213 B CN111766213 B CN 111766213B CN 202010635091 A CN202010635091 A CN 202010635091A CN 111766213 B CN111766213 B CN 111766213B
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- 230000005855 radiation Effects 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title abstract description 15
- 238000001228 spectrum Methods 0.000 title abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000003331 infrared imaging Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 230000005457 Black-body radiation Effects 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
Abstract
The invention discloses an unmanned aerial vehicle-mounted infrared spectrometer spectrum radiation on-line calibration method and device, wherein the device comprises an infrared spectrometer, a three-axis turntable, a radiation calibration blackbody and a radiation calibration control circuit; the infrared spectrometer is arranged below the body of the unmanned aerial vehicle through the three-axis table; the radiation calibration black body is fixed below the unmanned aerial vehicle body and at a position where the three-axis turntable can be viewed, the radiation target surface of the radiation calibration black body faces the infrared window of the infrared spectrometer, and the infrared window of the infrared spectrometer is aligned to the radiation target surface according to the requirement by controlling the rotation of the three-axis turntable; the calibration control circuit is electrically connected with the radiometric calibration blackbody; the three-axis turntable is connected with the upper computer; the calibration control circuit is used for completing temperature control and temperature setting of the radiometric calibration blackbody, and after receiving a calibration instruction and high and low temperature point parameters sent by the upper computer, the calibration control circuit starts to complete online radiometric calibration of the infrared spectrometer according to the flow of the calibration method. The invention well realizes on-line two-point radiation calibration of the machine.
Description
Technical Field
The invention belongs to the field of spectrum detection, and particularly relates to an unmanned aerial vehicle-mounted infrared spectrometer spectrum radiation on-line calibration method and device.
Background
The on-line radiation calibration of the infrared spectrometer is a technical basis for determining the performance index of the spectrum gas telemetry alarm system. By radiometric calibration, it is meant that the raw voltage signal acquired by the spectral imager is converted into absolute spectral radiant energy (e.g., radiance, irradiance, radiant temperature, etc.), which involves radiometric calibration methods, steady calibration of the radiation source, radiometric calibration procedures and devices, etc.
The traditional practice is that the calibration is carried out in a laboratory, and the calibration radiation source is arranged inside an infrared spectrometer.
The first method is not feasible because the helicopter-mounted infrared spectrometer is susceptible to severe drift caused by environmental temperature changes.
However, due to the limitations of the installation space and load of the unmanned aerial vehicle, the related parts required by on-line radiometric calibration are assembled inside the airborne infrared spectrometer, and the engineering problems of system volume, weight, heat dissipation and the like can be brought, so that the second method is also not ideal.
Disclosure of Invention
In order to better detect the spectral characteristics of an observation target of the airborne infrared spectrometer, the invention adopts the method of directly installing the radiometric calibration blackbody at the relative position of the unmanned aerial vehicle body, and the infrared window of the airborne infrared spectrometer is aligned to the blackbody irradiation target surface by controlling the airborne platform so as to meet the use requirement of the infrared imaging infrared spectrometer on-line field radiometric calibration.
Specifically, the technical problems to be solved by the invention are as follows:
the basic idea of the invention is to use a blackbody radiation target surface to realize two-point radiometric calibration function, thereby not only meeting the design requirements of miniaturization and light weight of an airborne infrared spectrometer, but also realizing the two-point radiometric calibration function and ensuring the spectrum radiometric calibration precision of the unmanned airborne infrared spectrometer.
Specifically, the technical scheme of the on-line radiometric calibration method of the unmanned aerial vehicle infrared spectrometer comprises the following steps:
1) The infrared spectrometer is fixed on a three-axis turntable which is arranged below the unmanned aerial vehicle body;
2) The miniaturized radiation calibration black body is used as the radiation calibration black body to be fixed at the near tail below the unmanned aerial vehicle body and at the position where the three-axis turntable and the three-axis turntable can be viewed, the radiation surface of the radiation calibration black body faces the infrared window of the infrared spectrometer, and the infrared window of the infrared spectrometer is aligned with the corresponding radiation target surface according to the requirement by controlling the three-axis turntable to rotate so as to complete the online radiation calibration of the infrared spectrometer.
3) Further, the radiometric calibration blackbody has the functions of electric refrigeration and electric heating.
4) Furthermore, the radiation calibration black body can also use the surface of the radiating water tank on the unmanned aerial vehicle as a high-temperature radiating surface, and meanwhile, a normal-temperature metal plate is arranged on one side of the radiating water tank, and the surface of the radiating water tank is used as a low-temperature radiating surface.
The calibration method of the invention adopts the following steps:
1) Firstly, controlling the radiation calibration blackbody to a low-temperature state, namely driving refrigeration by a calibration control circuit, and simultaneously feeding back state information of the radiation calibration blackbody to an infrared spectrometer for low-temperature radiation information acquisition by the calibration control circuit after the temperature is stable;
2) After the low-temperature calibration data information is collected, the calibration control circuit drives heating to control the radiation calibration blackbody to a high-temperature state, and temperature control is also performed through temperature feedback, and after the temperature of a high-temperature point is stable, the calibration control circuit feeds back the state information of the calibration device to the infrared spectrometer to collect high-temperature radiation information;
3) After the high-temperature and low-temperature two calibration image information is acquired, the information processing unit utilizes a two-point correction algorithm to complete the online real-time radiometric calibration of the infrared spectrometer.
The invention relates to a miniaturized infrared on-line radiation calibration device, which mainly comprises:
the device comprises an infrared spectrometer, a three-axis turntable, a radiometric calibration blackbody and a radiometric calibration control circuit;
the infrared spectrometer is fixed on a three-axis turntable, and the three-axis turntable is hung and installed below the unmanned aerial vehicle body;
the radiation calibration black body is fixed at a position below the body of the unmanned aerial vehicle, which can be seen by the three-axis table, the radiation surface of the radiation calibration black body faces the infrared window of the infrared spectrometer, and the infrared window of the infrared spectrometer is aligned to the corresponding radiation target surface according to the requirement by controlling the rotation of the three-axis table;
the said radiometric calibration blackbody has electric cooling and electric heating functions, the said calibration control circuit is installed in unmanned aerial vehicle and connected with upper computer and radiometric calibration blackbody electrically separately;
the three-axis turntable is connected with the upper computer through a serial port;
the unmanned aerial vehicle supplies power to the infrared spectrometer, the three-axis turntable and the calibration control circuit respectively;
when the onboard infrared spectrometer needs to carry out spectrum radiometric calibration, the upper computer sends a calibration instruction through the serial port, and the three-axis table 30 receives the calibration instruction and starts to rotate, so that the azimuth axis of the infrared spectrometer rotates to 180 degrees, and the rotation angles of the pitching axis and the rolling axis are 0 degree, so that the infrared window of the infrared spectrometer is opposite to the radiation target surface of the radiometric calibration blackbody;
the calibration control circuit is used for completing temperature control of the radiometric calibration blackbody, and comprises high and low temperature point parameter settings, and after receiving a calibration instruction and the high and low temperature point parameters sent by the upper computer, the calibration control circuit starts to complete online radiometric calibration of the infrared spectrometer according to the flow of the calibration method.
Compared with the existing radiometric calibration technology, the technical scheme of the device has the advantages of compact structural layout, capability of obviously reducing the volume and weight of the on-board on-line radiometric calibration device and meeting the requirements of miniaturization and light weight of an on-board infrared imaging infrared spectrometer. And the semiconductor refrigerator can realize refrigeration or heating of the blackbody radiation target surface according to the needs, so that the temperature of the radiometric calibration blackbody can be adjusted according to the calibration needs, the two-point radiometric calibration function of the infrared spectrometer is well realized, and better radiometric calibration precision is provided for the airborne infrared imaging infrared spectrometer.
Drawings
Fig. 1 is a schematic diagram of the configuration of one embodiment of the on-line scaling device of the present invention and the installation on a drone.
Fig. 2 is a flow chart of the on-line scaling method of the present invention.
FIG. 3 is a schematic diagram of the relationship between the infrared spectrometer of the on-line calibration device and the radiometric calibration black body during operation.
FIG. 4 is a schematic diagram showing the relationship between the infrared spectrometer and the radiometric calibration black body during radiometric calibration of the online calibration device of the invention.
Fig. 5 is a schematic view showing the construction of another embodiment of the on-line scaling device of the present invention.
Detailed Description
For the purposes of clarity, content, and advantages of the present invention, a detailed description of embodiments of the present invention will be described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 1, the on-line calibration device of the present invention includes an infrared spectrometer 10, a three-axis table 30, a radiation calibration black body 201, and a radiation calibration control circuit 202.
The infrared spectrometer 10 is fixed on a three-axis table 30, and the three-axis table 30 is mounted below the body of the unmanned aerial vehicle 40.
The radiation calibration black body 201 is fixed at a position near the tail below the body of the unmanned aerial vehicle 40 and capable of being viewed by the three-axis table, the radiation target surface of the radiation calibration black body 201 faces the infrared window of the infrared spectrometer 10, and the infrared window of the infrared spectrometer 10 is aligned to the corresponding radiation surface as required by controlling the three-axis table 30 to rotate.
The calibration control circuit 202 is arranged in the unmanned aerial vehicle 40 and is electrically connected with the upper computer and the radiometric calibration blackbody 201 respectively;
the three-axis turntable 30 is connected with an upper computer through a serial port.
The unmanned aerial vehicle 40 supplies power to the infrared spectrometer 10, the three-axis table 30 and the calibration control circuit 202 respectively.
When the onboard infrared spectrometer 10 needs to perform spectrum radiometric calibration, the upper computer sends a calibration instruction through the serial port, and the three-axis table 30 receives the calibration instruction and starts to perform rotary movement, so that the azimuth axis 301 of the onboard infrared spectrometer rotates to 180 degrees, and the rotation angles of the pitching axis 302 and the rolling axis 303 are 0 degrees, so that the infrared window 101 of the infrared spectrometer 10 is opposite to the radiation target surface of the radiometric calibration blackbody 201.
The calibration control circuit 202 is used for completing the temperature control of the radiation calibration blackbody 201, and comprises high and low temperature point parameter settings, and after the calibration control circuit 202 receives the calibration instruction and the high and low temperature point parameters sent by the upper computer, the on-line radiation calibration of the infrared spectrometer is completed according to the flow of the calibration method.
As shown in fig. 1 and 2, the working principle and the calibration flow of the on-line radiometric calibration device of the invention are as follows:
the radiation calibration black body 201 is mounted to the unmanned aerial vehicle 40 at a specific position relative to the infrared spectrometer 10, and when the infrared spectrometer 10 with the infrared imaging function works normally, the radiation calibration black body 201 is located outside the optical path of the infrared spectrometer 10. When the infrared spectrometer 10 needs to perform online radiometric calibration, firstly, the on-board three-axis table 30 rotates the infrared window 101 of the infrared spectrometer 10 to a radiometric calibration position opposite to the radiometric target surface of the radiometric calibration blackbody 201; then, the calibration control circuit 202 controls the semiconductor refrigerator to cool the target surface of the blackbody, and when the temperature of the target surface of the radiometric calibration blackbody 201 reaches the required low temperature, the infrared spectrometer 10 collects low-temperature image data of the target surface of the radiometric calibration blackbody 201; secondly, the scaling control circuit 202 controls the semiconductor refrigerator to heat the target surface of the radiation scaling blackbody 201, and when the temperature of the target surface of the radiation scaling blackbody 201 reaches the required high temperature, the infrared spectrometer 10 collects high-temperature image data of the radiation target surface of the radiation scaling blackbody 201; thirdly, the infrared imaging infrared spectrometer 10 finishes two-point radiation calibration by utilizing the collected high-low temperature image information of the target surface of the radiation calibration blackbody 201; finally, the infrared spectrometer 10 is rotated to the operating position by movement of the on-board three-axis table 30.
As shown in fig. 5, instead of the embodiment of the radiometric calibration blackbody 201, a surface of a radiator tank on the unmanned aerial vehicle may be used as the high-temperature radiation surface 401, and a normal-temperature metal plate is installed on one side of the radiator tank, and the surface of the radiator tank is used as the low-temperature radiation surface 402.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (2)
1. An unmanned aerial vehicle carries infrared spectrometer spectral radiation on-line calibration device, characterized by comprising:
the infrared spectrometer (10), the three-axis table (30), the surface of a radiating water tank on the unmanned aerial vehicle is used as a high-temperature radiating surface (401), a normal-temperature metal plate is arranged at one side of the radiating water tank, and the surface of the radiating water tank is used as a low-temperature radiating surface (402) and a radiation calibration control circuit (202);
the infrared spectrometer (10) is fixed on the three-axis table (30), and the three-axis table (30) is arranged at a position below the body of the unmanned aerial vehicle (40);
the infrared window of the infrared spectrometer (10) is aligned to the corresponding radiation surface according to the requirement by controlling the rotation of the three-axis table (30);
the calibration control circuit (202) is arranged in the unmanned aerial vehicle (40) and is electrically connected with an upper computer;
the three-axis turntable (30) is connected with the upper computer through a communication port;
the unmanned aerial vehicle (40) respectively supplies power to the infrared spectrometer (10), the three-axis turntable (30) and the calibration control circuit (202).
2. The on-line scaling device of claim 1, wherein:
the three-axis turntable (30) is connected with the upper computer through a serial port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010635091.1A CN111766213B (en) | 2020-07-03 | 2020-07-03 | Unmanned aerial vehicle-mounted infrared spectrometer spectrum radiation online calibration method and device |
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| CN202010635091.1A CN111766213B (en) | 2020-07-03 | 2020-07-03 | Unmanned aerial vehicle-mounted infrared spectrometer spectrum radiation online calibration method and device |
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| CN111766213A CN111766213A (en) | 2020-10-13 |
| CN111766213B true CN111766213B (en) | 2023-11-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112964653A (en) * | 2021-02-04 | 2021-06-15 | 上海卫星工程研究所 | Device and method for calibrating radiation before emission of satellite-borne interference type infrared hyperspectral detector |
| CN113008390B (en) * | 2021-02-23 | 2023-03-03 | 中国人民解放军63660部队 | Large-caliber spherical high-temperature surface source black body |
| CN113218514A (en) * | 2021-05-19 | 2021-08-06 | 西北工业大学 | Blackbody radiation source device and method for measuring and correcting atmospheric transmittance |
| CN114112967A (en) * | 2021-10-27 | 2022-03-01 | 昆明物理研究所 | Unmanned aerial vehicle carries chemical gas infrared detection system |
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| CN101089657A (en) * | 2007-07-13 | 2007-12-19 | 中国人民解放军理工大学气象学院 | Three servo device of optical nephoscope |
| CN105509898A (en) * | 2015-09-25 | 2016-04-20 | 中国科学院上海技术物理研究所 | Vacuum temperature control self locking real-time scaling device of thermal infrared high spectral imager |
| CN106005460A (en) * | 2016-07-28 | 2016-10-12 | 上海航天控制技术研究所 | Three-axis stable electro-optical pod for unmanned aerial vehicle |
| CN106370304A (en) * | 2016-08-31 | 2017-02-01 | 天津津航技术物理研究所 | Micro infrared real-time radiation calibration device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9715009B1 (en) * | 2014-12-19 | 2017-07-25 | Xidrone Systems, Inc. | Deterent for unmanned aerial systems |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089657A (en) * | 2007-07-13 | 2007-12-19 | 中国人民解放军理工大学气象学院 | Three servo device of optical nephoscope |
| CN105509898A (en) * | 2015-09-25 | 2016-04-20 | 中国科学院上海技术物理研究所 | Vacuum temperature control self locking real-time scaling device of thermal infrared high spectral imager |
| CN106005460A (en) * | 2016-07-28 | 2016-10-12 | 上海航天控制技术研究所 | Three-axis stable electro-optical pod for unmanned aerial vehicle |
| CN106370304A (en) * | 2016-08-31 | 2017-02-01 | 天津津航技术物理研究所 | Micro infrared real-time radiation calibration device |
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Inventor after: Yang Zhixiong Inventor after: Duan Shaoli Inventor after: Wang Hongwei Inventor after: Zeng Yi Inventor after: Wang Boyang Inventor after: Pang Lingling Inventor after: Zhang Weifeng Inventor after: Zhang Peizhong Inventor after: Zheng Weijian Inventor after: Lei Zhenggang Inventor after: Yan Min Inventor after: Yu Chunchao Inventor after: Zheng Chuanwu Inventor after: Wang Lingzhi Inventor before: Zhang Weifeng Inventor before: Duan Shaoli Inventor before: Wang Hongwei Inventor before: Zeng Yi Inventor before: Wang Boyang Inventor before: Pang Lingling Inventor before: Yang Zhixiong Inventor before: Zhang Peizhong Inventor before: Zheng Weijian Inventor before: Lei Zhenggang Inventor before: Yan Min Inventor before: Yu Chunchao Inventor before: Zheng Chuanwu Inventor before: Wang Lingzhi |