CN216593820U - On-orbit calibration device for double-star infrared sea temperature camera - Google Patents
On-orbit calibration device for double-star infrared sea temperature camera Download PDFInfo
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Abstract
The utility model discloses an on-orbit calibration device for a double-star infrared sea temperature camera, which belongs to the technical field of satellite optical remote sensors and comprises an installation bottom plate, a stepping motor, a rotary bearing seat, a rotary shaft, a calibration black body bracket, a high constant temperature calibration black body, a low constant temperature calibration black body and an infrared sea temperature camera main body; one end of the rotating shaft is matched with the stepping motor and arranged on the light path of the infrared sea temperature camera main body, and is fixedly arranged on the mounting base plate through a rotating bearing seat; the other end of the rotating shaft is fixedly connected with the calibration black body bracket; the calibration black body support is characterized in that a high constant temperature calibration black body and a low constant temperature calibration black body are respectively arranged at two ends of the calibration black body support, the calibration rotating shafts are parallel to the camera body mounting surface, the twin-lens is used as a central line, the twin-lens calibration is realized through rotation, the execution action is few, and the test efficiency is high. The calibration method can definitely calibrate the black body temperature at high and low constant temperatures according to the sea temperature characteristics, and simultaneously calibrate 2 groups of infrared lenses respectively, so as to adjust the imaging effect of the optical component in time.
Description
Technical Field
The utility model belongs to the technical field of satellite optical remote sensors, and particularly relates to an in-orbit calibration device for a double-satellite infrared sea temperature camera.
Background
During satellite launch and during in orbit operation, the optical, structural and electronic components can change, resulting in a change in the relationship between digitized output and radiance established by laboratory calibration. In order to obtain accurate image data, these variations must be corrected, which requires satellite calibration of the sensor on a laboratory scale basis.
The on-satellite infrared calibration is an essential link for remote sensing quantitative application and development by utilizing a calibration black body as a standard component to evaluate the radiation optical characteristics of a remote sensor in real time, and timely finding and correctly correcting the radiation response change of the remote sensor. For the camera realizes big visual field, adopt the mode of concatenation visual field, 2 groups of camera supporting lenses, need carry out on-the-planet calibration to 2 groups of lenses simultaneously. At present, the on-satellite calibration adopts a form of 'sunlight + diffuse reflection plate', the requirements on the reflection plate and the sunlight direction are higher, the calibration precision in the detection process is unstable, and the reliability is low.
Chinese patent 201410228458.2 discloses an onboard calibration device based on a variable temperature blackbody, which is used for onboard radiometric calibration of a satellite-borne infrared camera. The low-temperature black body is refrigerated by a semiconductor refrigerator, and heat generated by the semiconductor refrigerator is dissipated by radiation of a low-inertia dynamic-balance fan-shaped swing arm; the high-temperature black body is heated by an electric heater. The temperature of the high-temperature black body and the low-temperature black body can be adjusted within a certain temperature range and can be set according to requirements. When the infrared camera needs to be calibrated by radiation on the satellite, the stepping motor sequentially cuts high-temperature and low-temperature black bodies into a light path through the fan-shaped swing arm and moves out after the calibration is finished. The satellite calibration device adopts a low-temperature black body refrigerated by a semiconductor, and the calibration temperature range is expanded. The temperature of the high-temperature and low-temperature blackbodies is variable, so that the temperature of the high-temperature and low-temperature blackbodies can be set properly according to the temperature range of the observed scene, and the calibration precision is improved. However, in the technology, the rotating shaft is perpendicular to the installation surface of the camera body and perpendicular to the installation plane of the camera body, and high-low temperature black body test is respectively carried out on a single lens through rotation during double-lens calibration, so that the problems of multiple execution actions and low test efficiency are solved.
Disclosure of Invention
Based on the problems, the utility model provides an on-orbit calibration device and a calibration method for a double-star infrared ocean temperature camera, which solve the problems that because a rotating shaft is vertical to a camera main body installation plane, high and low temperature black body tests are respectively carried out on a single lens through rotation during double-lens calibration, the execution action is more, and the test efficiency is low, and the content of the utility model is as follows:
the utility model aims to provide an on-orbit calibration device of a double-star infrared sea temperature camera, which is technically characterized by comprising an installation bottom plate, a stepping motor, a rotary bearing seat, a rotary shaft, a calibration black body bracket, a high constant temperature calibration black body, a low constant temperature calibration black body and an infrared sea temperature camera main body; the infrared sea temperature camera main body is fixedly arranged on the mounting base plate, one end of the rotating shaft is matched with the stepping motor and arranged on a light path of the infrared sea temperature camera main body, and the rotating shaft is fixedly arranged on the mounting base plate through a rotating shaft bearing seat; the other end of the rotating shaft is fixedly connected with the calibration black body bracket; and the two ends of the calibration black body support are respectively provided with a high constant temperature calibration black body and a low constant temperature calibration black body.
Furthermore, the high constant temperature calibration black body and the low constant temperature calibration black body of the utility model are heated in a multi-path heating mode.
Furthermore, the high constant temperature calibration black body is made of a high thermal conductivity material, and the surface of the high constant temperature calibration black body is subjected to black anodizing treatment.
Furthermore, the low constant temperature calibration black body is made of a high thermal conductivity material, and the surface of the low constant temperature calibration black body is subjected to black anodizing treatment.
Furthermore, the calibration black body bracket is made of high-thermal-conductivity materials.
Compared with the prior art, the utility model has the beneficial effects that:
1. the on-orbit calibration device for the double-star infrared sea temperature camera comprises an installation bottom plate, a stepping motor, a rotary bearing seat, a rotary shaft, a calibration black body bracket, a high constant temperature calibration black body, a low constant temperature calibration black body and an infrared sea temperature camera main body; the infrared sea temperature camera main body is fixedly arranged on the mounting base plate, one end of the rotating shaft is matched with the stepping motor and arranged on a light path of the infrared sea temperature camera main body, and the rotating shaft is fixedly arranged on the mounting base plate through a rotating shaft bearing seat; the other end of the rotating shaft is fixedly connected with the calibration black body bracket; the calibration blackbody support is characterized in that a high constant temperature calibration blackbody and a low constant temperature calibration blackbody are respectively arranged at two ends of the calibration blackbody support, a calibration rotating shaft is parallel to a camera body mounting surface, the twin-lens is used as a central line, the twin-lens calibration is realized through rotation, the execution action is few, and the test efficiency is high.
2. The calibration method of the on-orbit calibration device of the double-star infrared sea temperature camera can clearly calibrate the black body temperature at high and low constant temperatures according to the sea temperature characteristics, simultaneously calibrate 2 groups of infrared lenses respectively, and adjust the imaging effect of the optical component in time.
Drawings
FIG. 1 is a schematic structural diagram of an in-orbit calibration device for a two-star infrared ocean temperature camera according to the present invention;
FIG. 2 is a schematic diagram of a calibration structure of the on-orbit calibration device for the infrared ocean temperature camera on two stars according to the present invention;
FIG. 3 is a schematic diagram of an imaging structure of the on-orbit calibration device of the double-star infrared ocean temperature camera of the present invention;
1, mounting a bottom plate; 2-a step motor; 3-rotating the bearing seat; 4-a rotating shaft; 5-scaling the blackbody support; 6-high constant temperature calibration black body; 7-low constant temperature calibration black body; 8-infrared sea temperature camera body.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the concept of the utility model. All falling within the scope of the present invention.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
The on-orbit calibration device for the double-star infrared sea temperature camera comprises an installation bottom plate 1, a stepping motor 2, a rotary bearing seat 3, a rotary shaft 4, a calibration black body bracket 5, a high constant temperature calibration black body 6, a low constant temperature calibration black body 7 and an infrared sea temperature camera main body 8, wherein the installation bottom plate is provided with a plurality of through holes; the infrared sea temperature camera main body 8 is fixedly arranged on the mounting base plate 1, one end of the rotating shaft 4 is matched with the stepping motor 2 and arranged on the light path of the infrared sea temperature camera main body 8, and the rotating shaft 4 is fixedly arranged on the mounting base plate 1 through the rotating bearing seat 3; the other end of the rotating shaft 4 is fixedly connected with a calibration black body bracket 5; and a high constant temperature calibration black body 6 and a low constant temperature calibration black body 7 are respectively arranged at two ends of the calibration black body bracket 5.
As shown in fig. 2 and 3, the constant temperature calibration black body of the present application includes a high constant temperature calibration black body 6 and a low constant temperature calibration black body 7, and the high constant temperature calibration black body 6 and the low constant temperature calibration black body 7 are installed at 161 degrees according to the lens installation requirements of the double-sea temperature camera, so that the high constant temperature calibration black body 6 and the low constant temperature calibration black body 7 can completely and vertically cover the optical component to be calibrated in the calibration state, and simultaneously cover the view field of the optical component. The high constant temperature calibration black body 6 and the low constant temperature calibration black body 7 are heated in a multi-path heating mode, are designed based on a platinum resistor temperature measuring circuit and a PWM control output circuit, and are used for determining the temperature of the temperature control black body and improving the calibration precision and the equipment reliability according to the calibration characteristics of the sea temperature camera. Preferably, the high constant temperature calibration black body 6 is made of a material with high thermal conductivity, and the surface thereof is anodized in black. The low constant temperature calibration black body 7 is also made of a material with high thermal conductivity, and the surface is anodized in black. The calibration black body bracket 5 of the present application is made of a high thermal conductivity material.
The on-orbit calibration method of the double-star infrared sea temperature camera comprises the following steps:
step 1, when calibration is started, the calibration equipment adopts a one-dimensional rotating mechanism, a stepping motor 2 drives a rotating shaft 4 to rotate to drive a calibration black body support 5 to rotate, the calibration black body support 5 rotates by 90 degrees from an original vertical state to be in a horizontal working state, so that a high constant temperature calibration black body 6 and a low constant temperature calibration black body 7 respectively cover a group of lenses of a sea temperature camera 2, and the calibration black body support 5 is in a horizontal state when the sea temperature camera images;
step 2, heating the high constant temperature calibration black body 6 and the low constant temperature calibration black body 7 to fixed temperatures, setting the temperatures of the high constant temperature calibration black body 6 and the low constant temperature calibration black body 7 to 290K and 310K respectively because the temperature of seawater in an infrared band is about 300K, respectively calibrating by 2 cameras on the infrared seawater temperature camera main body 8, driving the two black bodies to rotate to completely cover a telescope lens hood by a rotating mechanism in a camera imaging mode, and then acquiring 10s calibration data by the camera to finish first calibration;
step 3, driving the rotating shaft 4 to rotate through the stepping motor 2, driving the calibration black body bracket 5 to rotate, rotating the calibration black body bracket 5 by 180 degrees, and exchanging the positions of the two black bodies;
step 4, respectively calibrating the high constant temperature calibration black body 6 and the low constant temperature calibration black body 7 by 2 cameras on the infrared sea temperature camera main body 8, and acquiring calibration data for 10s again to finish the second calibration;
and 6, the stepping motor 2 drives the rotating shaft 4 to rotate to drive the calibration black body support 5 to rotate, the calibration black body support 5 is rotated by 90 degrees from the original vertical state to be in a vertical imaging state, and calibration is finished. The total time for completing one round of on-track calibration is about 40s, and the operation is convenient.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model.
Claims (5)
1. An on-orbit calibration device for a double-star infrared sea temperature camera is characterized by comprising an installation bottom plate (1), a stepping motor (2), a rotary bearing seat (3), a rotary shaft (4), a calibration black body bracket (5), a high constant temperature calibration black body (6), a low constant temperature calibration black body (7) and an infrared sea temperature camera main body (8); the infrared sea temperature camera main body (8) is fixedly arranged on the mounting bottom plate (1), one end of the rotating shaft (4) is matched with the stepping motor (2) and arranged on a light path of the infrared sea temperature camera main body (8), and the rotating shaft is fixedly arranged on the mounting bottom plate (1) through the rotating shaft bearing seat (3); the other end of the rotating shaft (4) is fixedly connected with the calibration blackbody bracket (5); the two ends of the calibration blackbody bracket (5) are respectively provided with a high constant temperature calibration blackbody (6) and a low constant temperature calibration blackbody (7).
2. The on-orbit calibration device for the double-star infrared ocean temperature camera according to claim 1, wherein the high constant temperature calibration black body (6) and the low constant temperature calibration black body (7) are heated by means of multi-path heating.
3. The double-star infrared on-sea temperature camera on-orbit calibration device according to claim 1, wherein the high constant temperature calibration black body (6) is made of a high thermal conductivity material and the surface is anodized in black.
4. The on-orbit calibration device for the two-star infrared marine temperature camera according to claim 1, wherein the low constant temperature calibration black body (7) is made of a material with high thermal conductivity and has a black anodized surface.
5. The on-orbit calibration device for the double-star infrared marine temperature camera according to claim 1, wherein the calibration black body bracket (5) is made of a material with high thermal conductivity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123003701.5U CN216593820U (en) | 2021-12-02 | 2021-12-02 | On-orbit calibration device for double-star infrared sea temperature camera |
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| CN202123003701.5U CN216593820U (en) | 2021-12-02 | 2021-12-02 | On-orbit calibration device for double-star infrared sea temperature camera |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061767A (en) * | 2021-12-02 | 2022-02-18 | 南通智能感知研究院 | On-orbit calibration device and method for double-star infrared sea temperature camera |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061767A (en) * | 2021-12-02 | 2022-02-18 | 南通智能感知研究院 | On-orbit calibration device and method for double-star infrared sea temperature camera |
| CN114061767B (en) * | 2021-12-02 | 2024-08-27 | 南通长三角智能感知研究院 | On-orbit calibration device and calibration method for double-star infrared sea temperature camera |
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Effective date of registration: 20240204 Address after: 226009 Floor 7, Building 16, Zilang Technopole, No. 60, Chongzhou Avenue, Chongchuan District, Nantong City, Jiangsu Province Patentee after: Nantong Institute of intelligent perception Country or region after: China Patentee after: SHANGHAI INSTITUTE OF TECHNICAL PHYSICS, CHINESE ACADEMY OF SCIENCE Address before: 226009, 7th floor, Building 16, Zilang Science and Technology City, Central Innovation Zone, Chongchuan District, Nantong City, Jiangsu Province Patentee before: Nantong Institute of intelligent perception Country or region before: China |
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Address after: Building 16, Zilang Technology City, No. 60 Chongzhou Avenue, Innovation Zone, Nantong City, Jiangsu Province, 226009 Patentee after: Nantong Yangtze River Delta Intelligent Perception Research Institute Country or region after: China Patentee after: SHANGHAI INSTITUTE OF TECHNICAL PHYSICS, CHINESE ACADEMY OF SCIENCE Address before: Building 16, Zilang Technology City, No. 60 Chongzhou Avenue, Innovation Zone, Nantong City, Jiangsu Province, 226009 Patentee before: Nantong Institute of intelligent perception Country or region before: China Patentee before: SHANGHAI INSTITUTE OF TECHNICAL PHYSICS, CHINESE ACADEMY OF SCIENCE |