CN114633906B - Ultraviolet dynamic earth simulator - Google Patents
Ultraviolet dynamic earth simulator Download PDFInfo
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- CN114633906B CN114633906B CN202210381015.1A CN202210381015A CN114633906B CN 114633906 B CN114633906 B CN 114633906B CN 202210381015 A CN202210381015 A CN 202210381015A CN 114633906 B CN114633906 B CN 114633906B
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- 238000004088 simulation Methods 0.000 claims abstract description 44
- 230000003287 optical effect Effects 0.000 claims abstract description 20
- 230000005855 radiation Effects 0.000 claims abstract description 19
- 230000003068 static effect Effects 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 238000002211 ultraviolet spectrum Methods 0.000 claims description 6
- 125000004122 cyclic group Chemical group 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 2
- 229920005591 polysilicon Polymers 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
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Abstract
The invention discloses an ultraviolet dynamic earth simulator which comprises a simulator head, a control computer, ultraviolet earth simulation display software, a guide rail and an adjusting mechanism. The simulator head consists of a collimation optical system, an ultraviolet display, a driving circuit, an ultraviolet light source, a collimation lens cone and a shell. The ultraviolet earth simulation display software is arranged in the control computer, the software can generate dynamic earth ultraviolet disc and sky background images in real time, the simulation images are displayed on the ultraviolet display through a driving circuit of the head of the simulator, light rays emitted by the ultraviolet display are converged through the collimation optical system to form parallel light, the observation effect on the earth surface radiance spatial distribution of real earth edge ultraviolet radiation brightness along with the change of the quaternary phase and the change of the daily phase can be simulated on the indoor limited distance, and the simulation test on the performance, the polarity and the angle of the ultraviolet earth sensor is realized. The invention has simple structure, small volume, light weight and convenient operation, and can flexibly output static or dynamic earth simulation images.
Description
Technical Field
The invention relates to the technical field of ultraviolet earth simulators, in particular to an ultraviolet dynamic earth simulator.
Background
The ultraviolet earth simulator is a component part of the satellite control subsystem test equipment and is used for testing the functions and performances of the ultraviolet earth sensor by the satellite control subsystem.
Previous ultraviolet earth simulators have typically consisted of an ultraviolet light source, an ultraviolet filter, an earth reticle or diaphragm, an ultraviolet collimating optics, and an ultraviolet collimating lens barrel. To achieve a simulation of different earth images with respect to the ultraviolet earth sensor optical axis, a different earth reticle or earth diaphragm needs to be replaced. Such ultraviolet earth simulators are commonly used for simulation of static earth images. Some ultraviolet earth simulators adopt hollow luminous ellipsoids to simulate the earth, and the system occupies large space and is complex to operate.
Some ultraviolet earth simulators today require that an ultraviolet earth sensor be provided with an earth disk ultraviolet signal and a sky background cold signal at any time. The method has the advantages that the spatial distribution characteristics of the radiation brightness of the earth surface at different moments are given, the characteristics of the ultraviolet radiation brightness of the earth edge along with the change of the season phase and the change of the day can be simulated, and the vertical change rule of the radiation brightness of the earth edge along with the height of the tangent point can be simulated. It is apparent that the previous earth image simulation method is insufficient to meet the current engineering requirements.
Disclosure of Invention
The invention aims at solving the limitations of the prior ultraviolet earth image simulation method and practical engineering requirements, and provides an ultraviolet dynamic earth simulator which is small in size, light in weight, capable of flexibly supporting the simulation of dynamic or static earth images and simple to operate.
The invention adopts the technical scheme that: an ultraviolet dynamic earth simulator comprises an ultraviolet earth simulator head, a control computer, ultraviolet earth simulation display software, a guide rail and an adjusting mechanism. The head of the ultraviolet earth simulator consists of a collimation optical system, an ultraviolet display, a driving circuit, an ultraviolet light source, a collimation lens barrel and a shell. The collimating optical system is positioned in the collimating lens barrel, the driving circuit and the ultraviolet light source are positioned in the shell, the ultraviolet display is positioned at the optimal image plane near the focus of the collimating optical system, the ultraviolet light source emits ultraviolet light covering the working wave band and fills the front ultraviolet display, and the ultraviolet light is emitted out of the head of the ultraviolet earth simulator through the collimating optical system in parallel light, so that an image target at infinity is provided for the ultraviolet earth sensor; the ultraviolet earth simulation display software is installed in the control computer, and can generate the earth ultraviolet disk and sky background image data which can be observed by the ultraviolet earth sensor at the current moment by the earth edge ultraviolet radiation brightness database according to the epoch information of the ultraviolet earth sensor at a certain moment or the epoch information which is locally arranged and received by the network, and then generate the earth ultraviolet disk and sky background image on the ultraviolet display by the driving circuit. The light rays emitted by the simulation image are converged by the collimation optical system to form parallel light, and the observation effect on the spatial distribution of the radiation brightness of the earth surface, which is generated by the change of the ultraviolet radiation brightness of the edge of the real earth along with the change of the season phase and the change of the day, can be simulated on the indoor limited distance. The simulation test of the performance, polarity and angle of the ultraviolet earth sensor is realized.
Furthermore, the control computer communicates with the earth measurement main control computer through an external interface, ultraviolet earth simulation display software installed in the control computer receives epoch time information sent by the earth measurement main control computer in real time, takes the information as input with an external epoch driving mode, selects a data file which is the same as epoch time in an earth edge ultraviolet radiation brightness database, and calculates and flexibly outputs static or dynamic ultraviolet earth simulation images.
Furthermore, the ultraviolet earth simulation display software supports two working modes of external epoch driving and no external epoch driving, and can realize the cyclic display output of single-point, single-day or annual earth ultraviolet images in the two working modes.
Further, the global edge ultraviolet radiation brightness annual database consists of global ultraviolet spectrum characteristic data files acquired in different seasons and different periods of time. And selecting important observation points such as an adjacent point, an under-satellite point, an intermediate point between the adjacent point and the under-satellite point and the like at 4 positions relative to the upper, lower, left and right of the observation point in each data file, wherein 17 observation points are in total in a spherical area observed by the ultraviolet earth sensor.
Further, the ultraviolet display utilizes polysilicon technology to embed a driving circuit on a substrate. Has the characteristics of miniaturization, light weight, high reliability and the like. The earth brightness can be simulated by the ultraviolet light source and adjusting the luminous brightness of the light source, and can also be changed by the earth gray value displayed by software.
Further, the driving circuit is used for controlling the data transmission of the brightness data of the ultraviolet radiation at the earth edge between the computer and the ultraviolet display by the ultraviolet earth simulator, and finishing the functions of displaying and refreshing the earth image of the display.
Further, the ultraviolet earth simulator ensures the relative position precision of the ultraviolet earth sensor and the ultraviolet earth simulator through the support, the guide rail and the adjusting mechanism in the horizontal direction.
Further, the ultraviolet earth simulation image mainly generates the following procedures:
(1) Establishing a database according to the ultraviolet spectrum characteristic data of the earth;
(2) Converting the related information of 17 positions of each data file in the database into image position and brightness information of planar display;
(3) Fitting brightness data of all pixel positions in the whole circular area through the positions and brightness information of 17 position points, and storing the brightness data as an image file;
(4) Adding a background star map into an image file according to requirements;
(5) And displaying and outputting a static earth simulation image or a dynamic earth simulation image.
Further, outputting a different static or dynamic earth-simulated image does not require replacement of any components of the system.
From the above technical solutions, the embodiment of the present invention has the following advantages:
the ultraviolet earth simulator provided by the invention has the advantages of simple structure, convenience in operation and high reliability. Under the condition that equipment components are not required to be replaced, the ultraviolet earth image can be flexibly simulated, and the ultraviolet earth image of a ring or a circle or an arc can be output by setting the working mode of ultraviolet earth simulation display software and managing an earth edge ultraviolet radiation brightness database and related calculation, so that the current engineering requirements are met.
Drawings
FIG. 1 is a schematic diagram of an ultraviolet earth simulator system according to the present invention.
Fig. 2 is a schematic diagram of a head structure of an ultraviolet earth simulator according to the present invention, wherein 21 is a collimating optical system, 22 is a collimating lens barrel, 23 is an ultraviolet display, 24 is an ultraviolet light source, 25 is a driving circuit, and 26 is a casing.
Fig. 3 is a schematic view of the distribution of the observation points on the earth surface (after projection) according to the present invention.
Fig. 4 is a partial ultraviolet earth display effect diagram of the analog output according to the present invention, in which fig. 4 (a) is a partial ultraviolet earth display effect diagram of the analog output first, and fig. 4 (b) is a partial ultraviolet earth display effect diagram of the analog output second.
Detailed Description
In order to enable those skilled in the art to better understand the present invention, the following description is made clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and in practical implementation, the specification, model or number of the adjustable components, such as: the type and number of uv displays, etc., and the layout of their components may also be more complex. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The invention relates to an ultraviolet dynamic earth simulator, which comprises: the device comprises an ultraviolet earth simulator head, a control computer, ultraviolet earth simulation display software, a guide rail and an adjusting mechanism. The ultraviolet earth simulator head consists of a collimation optical system 21, an ultraviolet display 23, a driving circuit 25, an ultraviolet light source 24, a collimation lens barrel 22 and a shell 26, wherein the collimation optical system 21 is positioned in the collimation lens barrel 22, the driving circuit 25 and the ultraviolet light source 24 are positioned in the shell 26, the ultraviolet display 23 is positioned at the optimal image plane near the focus of the collimation optical system 21, the ultraviolet light source 24 emits ultraviolet light covering the working wave band, the ultraviolet display 23 in front is filled, the ultraviolet earth simulator head is emitted out in parallel light through the collimation optical system 21, and an image target at infinity is provided for the ultraviolet earth sensor.
As shown in fig. 1, when a system semi-physical simulation experiment is performed, the relative position accuracy of the ultraviolet earth sensor and the ultraviolet dynamic earth simulator is ensured by a support, a guide rail and an adjusting mechanism in the horizontal direction.
The satellite is set as a geosynchronous stationary satellite, the distance between the ultraviolet earth sensor and the earth surface is set to 36000km, the satellite runs along the equator, and the satellite position is known.
In the working mode of external epoch driving, the ultraviolet earth simulation display software in the ultraviolet dynamic earth simulator control computer can receive epoch time information input by the main control computer in real time through the network interface, inquire corresponding data files in the earth edge ultraviolet radiation brightness database according to the epoch time, convert and calculate the data information in the data files to generate an ultraviolet earth simulation image, the simulation image is displayed on an ultraviolet display at the head of the simulator, and parallel light is formed after the parallel light is converged by the collimating optical system for being received by the ultraviolet earth sensor.
In the working mode without external epoch driving, the ultraviolet earth simulation display software in the ultraviolet dynamic earth simulator control computer can directly select required data files in the earth edge ultraviolet radiation brightness database, calculate and generate corresponding ultraviolet earth simulation images, the simulation images are also displayed on an ultraviolet display at the head of the simulator, and parallel light is formed after the parallel light is converged by a collimation optical system for being received by an ultraviolet earth sensor.
Under two working modes of external epoch driving and no external epoch driving, three subdivision working modes of single-point image cyclic output, single-day image cyclic output and annual image cyclic output can be carried out.
The global edge ultraviolet radiation brightness annual database consists of global ultraviolet spectrum characteristic data files acquired at different time periods in a plurality of different seasons. Each data file contains important observation points such as an adjacent point, an under-satellite point, an intermediate point between the adjacent point and the under-satellite point, and the like at 4 positions above, below, left and right relative to the observation point, and 17 observation points are arranged in a spherical area observed by the ultraviolet earth sensor, and the position layout is shown in fig. 3.
The ultraviolet display resolution is 1920×1080, and the pixel size is 8 μm×8 μm.
The working wavelength range of the ultraviolet dynamic earth simulator is 330 nm-360 nm.
The ultraviolet earth simulation image mainly comprises the following steps:
(1) Establishing a database according to the ultraviolet spectrum characteristic data of the earth;
(2) Converting the related information of 17 positions of each data file in the database into image position and brightness information of planar display;
(3) Fitting brightness data of all pixel positions in the whole circular area through the positions and brightness information of 17 position points, and storing the brightness data as an image file;
(4) Adding a background star map into an image file according to requirements;
(5) And displaying and outputting a static earth simulation image or a dynamic earth simulation image.
Claims (2)
1. An ultraviolet dynamic earth simulator is characterized in that: the ultraviolet earth simulator head comprises an ultraviolet earth simulator head, a control computer, ultraviolet earth simulation display software, a guide rail and an adjusting mechanism, wherein the ultraviolet earth simulator head consists of a collimation optical system (21), an ultraviolet display (23), a driving circuit (25), an ultraviolet light source (24), a collimation lens barrel (22) and a shell (26), the collimation optical system (21) is positioned in the collimation lens barrel (22), the driving circuit (25) and the ultraviolet light source (24) are positioned in the shell (26), the ultraviolet display (23) is positioned at the optimal image plane near the focus of the collimation optical system (21), the ultraviolet light source (24) emits ultraviolet light covering a working wave band and fills the ultraviolet display (23) in the front, and the ultraviolet earth simulator head is emitted in parallel light through the collimation optical system (21) to provide an image target at infinity for the ultraviolet earth sensor; the ultraviolet earth simulation display software is installed in the control computer, the software can generate the earth ultraviolet disc and sky background image data which can be observed by the ultraviolet sensor at the current moment by the earth edge ultraviolet radiation brightness database according to the epoch information of the ultraviolet sensor at a certain moment or the epoch information which is locally arranged and is received by the network, then the earth ultraviolet disc and sky background image are generated on the ultraviolet display by the driving circuit, the light rays emitted by the simulation image are converged by the collimation optical system to form parallel light, the observation effect of the earth surface radiance space distribution of the real earth edge ultraviolet radiation brightness along with the change of the season phase and the change of the day can be simulated on the indoor limited distance, and the simulation test of the performance, the polarity and the angle of the ultraviolet earth sensor is realized;
the working wavelength range of the ultraviolet dynamic earth simulator is 330 nm-360 nm;
the ultraviolet display utilizes the polysilicon technology, and a drive circuit is built in the substrate; the earth brightness is simulated by an ultraviolet light source and adjusting the luminous brightness of the light source, or the earth gray value displayed by software is changed;
the relative position precision of the ultraviolet earth sensor and the ultraviolet earth simulator is ensured by the support, the guide rail and the adjusting mechanism in the horizontal direction.
2. The ultraviolet dynamic earth simulator of claim 1, wherein: the control computer is communicated with the ground measurement main control computer through an external interface; the ultraviolet earth simulation display software installed in the control computer receives the epoch time information sent by the master control computer in real time, takes the information as the input with an external epoch driving mode, selects the data file which is the same as epoch time in the earth edge ultraviolet radiation brightness database, calculates and flexibly outputs static or dynamic ultraviolet earth simulation images;
the ultraviolet earth simulation display software supports two working modes of external epoch driving and no external epoch driving, and can realize the cyclic display output of single-point, single-day or annual earth ultraviolet images in the two working modes;
the global edge ultraviolet radiation brightness annual database consists of global ultraviolet spectrum characteristic data files acquired in different seasons and different time periods; selecting important observation points of the adjacent points and the satellite bottom points, the adjacent points and the middle points among the satellite bottom points at 4 positions relative to the upper, lower, left and right positions of the observation point by each data file, wherein 17 observation points are in total in a spherical area observed by an ultraviolet earth sensor;
the satellite is set as a geosynchronous stationary satellite, the distance between an ultraviolet earth sensor and the earth surface is set to 36000km, the satellite runs along the equator, and the satellite position is known;
the resolution of the ultraviolet display is 1920 multiplied by 1080, and the pixel size is 8 mu m multiplied by 8 mu m;
the ultraviolet earth simulation image mainly comprises the following steps:
(1) Establishing a database according to the ultraviolet spectrum characteristic data of the earth;
(2) Converting the related information of 17 positions of each data file in the database into image position and brightness information of planar display;
(3) Fitting brightness data of all pixel positions in the whole circular area through the positions and brightness information of 17 position points, and storing the brightness data as an image file;
(4) Adding a background star map into an image file according to requirements;
(5) Displaying and outputting a static earth simulation image or a dynamic earth simulation image;
the ultraviolet dynamic earth simulator manages the earth edge ultraviolet radiation brightness database and related calculation by setting the working mode of ultraviolet earth simulation display software under the condition that equipment components are not required to be replaced, so that the flexible simulation of ultraviolet earth images can be realized, and the ultraviolet earth images of rings or circles or arcs can be output.
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