Laboratory variable-angle spectrum observation device and method for simulating rotation of asteroid

Abstract

The invention provides a laboratory variable-angle spectrum observation device and method for simulating rotation of an asteroid. The device comprises an annular guide rail; the two sliding tables can slide along the circular ring guide rail; the rotating assembly is fixed in the ring inner space of the circular ring guide rail and used for fixing the asteroid miniature model and driving the model to rotate according to the set speed and direction; the two bracket assemblies are the same in height and are respectively fixed on the sliding tables; the light source is connected to a bracket assembly through an optical fiber; the spectrograph is also connected to the other support assembly through the optical fiber; the height of the end of the incident optical fiber and the height of the end of the emergent optical fiber fixed on the support assembly are the same as the height of an asteroid miniature model, and the incident optical fiber and the emergent optical fiber directly face the model. And the controller is used for controlling the spectrograph and controlling the rotating speed and direction of the rotating assembly for driving the asteroid miniature model to rotate. The method has the advantage that the spectrum curve of the miniature asteroid model under the conditions of different rotation speeds, phase angles, single integration time and integration times can be obtained.

Description

Technical Field

[0001] This application belongs to the field of variable-angle spectral observation, specifically relating to a laboratory variable-angle spectral observation device and method for simulating asteroid rotation. Background Technology

[0002] Optical remote sensing is a technology that uses optical sensors to collect information about objects and phenomena from a certain distance and processes it into shape, image, color, and spectrum. Optical remote sensing observation technology is an important means for humankind to understand extraterrestrial objects and is currently widely used in deep space exploration missions.

[0003] In the field of asteroid research, remote sensing spectroscopic observation is one of the most important research methods. These remote sensing spectra are generally acquired through ground-based / space-based telescopes or detectors. When interpreting remote sensing spectra, it is usually necessary to observe the spectra of potential asteroid surface materials in the laboratory to serve as an important reference for remote sensing spectral data calibration and subsequent spectral analysis.

[0004] However, existing laboratory-based spectroscopic observation techniques related to asteroids have the following limitations: (1) Using sheet or powder samples: Existing methods mainly use meteorite samples or various simulants prepared based on terrestrial rocks and minerals to represent the surface material of asteroids, and conduct spectroscopic observations on sheet or powder samples in the laboratory. When applied to the analysis and interpretation of ground-based or orbital telemetry spectroscopic data, the influence of the asteroid's own shape is not reflected; (2) Using static observation mode: Existing methods mainly conduct reflectance spectral measurements in the static state of simulated samples, and fail to simulate the rotational motion characteristics of asteroids in the real space environment, especially the observation mode. The different ratios of the measurement integration time and the rotation period may affect the morphological characteristics of the spectral curve, thereby affecting the scientific interpretation of the material composition and evolution characteristics of the target asteroid surface; (3) Lack of spectral observation: There are currently some devices that can perform tests while simulating sample rotation, such as the Chinese invention patent "A simulation experimental device suitable for rubble pile asteroids" with publication number CN120440321A and the Chinese invention patent "A dynamic testing device and testing method for the spin process of asteroid simulation" with publication number CN120702395A, but these devices lack the ability to measure the spectrum. Summary of the Invention

[0005] The purpose of this application is to overcome the shortcomings of current laboratory-based spectroscopic observations of asteroids, which fail to reflect the influence of the asteroid's shape and rotational motion.

[0006] To achieve the above objectives, this application proposes a laboratory variable-angle spectroscopic observation device for simulating asteroid rotation, comprising: Circular guide rail; Two slides are mounted on the circular guide rail; the slides are capable of sliding along the circular guide rail. A rotating component, fixed within the ring space of the circular guide rail, is used to fix the miniature asteroid model on the axis of the circular guide rail and drive the miniature asteroid model to rotate at a set speed and direction. Two support assemblies of the same height; each of the support assemblies is fixed to one of the slides; light source; Spectrometer; An incident optical fiber is connected at one end to the light source and at the other end to one of the support components; The outgoing optical fiber is connected to the spectrometer at one end and fixed to another support assembly at the other end; the height of the ends of the incoming and outgoing optical fibers fixed to the support assembly is the same as the height of the asteroid miniature model and is directly facing the asteroid miniature model. A controller is used to control the spectrometer and to control the speed and direction of rotation of the asteroid miniature model driven by the rotating assembly.

[0007] As an improvement to the above system, the surface of the circular guide rail has a scale indicating angles.

[0008] As an improvement to the above system, the rotating component includes: Two electric rotating shafts are coaxially arranged in the vertical direction and are spaced a predetermined distance apart; the axes of the two electric rotating shafts coincide with the axis of the circular guide rail. Two motors are used to drive one of the electric shafts to rotate, respectively; Two fixed columns are detachably fixed to the opposite ends of the two electric rotating shafts, and their axes coincide with the axes of the two electric rotating shafts respectively; Two screw pins are detachably fixed to opposite ends of the fixing post to secure the miniature asteroid model from both above and below. Adjusting the screw of the screw pin can change its length.

[0009] As an improvement to the above system, the support assembly includes: A support bracket fixed above the slide table; A cage system fixed above the support bracket is used to fix one end of the incident optical fiber or the outgoing optical fiber; the axis of the cage system is parallel to the plane of the circular guide rail.

[0010] This application also provides a laboratory variable-angle spectroscopic observation method for simulating asteroid rotation, implemented based on the above-mentioned device, the method comprising: Step 1: Connect one end of the incident fiber to the light source and fix the other end to a support assembly; connect one end of the output fiber to the spectrometer and fix the other end to another support assembly. Step 2: Turn on the controller, rotating assembly, light source, and spectrometer; Step 3: Fix the miniature asteroid model onto the rotating assembly, with the height being the same as the height of the ends of the incident and outgoing optical fibers fixed on the support assembly. Step 4: Adjust the position of the slide on the circular guide rail so that the phase angle of the spectral measurement reaches the set angle; Step 5: The controller controls the rotating component to drive the miniature asteroid model to rotate at the set speed and direction; Step 6: Set the controller to the expected single integration time and number of integrations for the spectrometer; Step 7: Start measuring the spectrum and obtain the spectral curves measured under the current shape, phase angle, single integration time and number of integrations of the asteroid miniature model.

[0011] Compared with existing technologies, the advantages of this application are: This application clamps a miniature asteroid model between two fixed pillars and drives the miniature asteroid model to rotate at a specific speed using an electric rotating shaft. At the same time, it performs spectral measurements under specific phase angles, single integration times, and integration counts, thereby obtaining spectral curves of the miniature asteroid model under different rotation speeds, phase angles, single integration times, and integration counts, so as to study the influence of these factors on the shape of the spectral curves. Attached Figure Description

[0012] Figure 1 The image shown is a top view of the laboratory variable-angle spectroscopic observation device for simulating asteroid rotation. Figure 2 The image shown is a front view of the laboratory variable-angle spectroscopic observation device for simulating asteroid rotation. Figure 3 The diagram shows a schematic of the laboratory variable-angle spectroscopic observation method for simulating asteroid rotation.

[0013] Attached image labels: 1. Circular guide rail; 2. Slide table; 3. Rotary assembly; 31. Electric rotating shaft; 32. Two fixed columns; 4. Support assembly; 41. Support bracket; 42. Cage system; 51. Spectrometer; 52. Light source; 53. Incident optical fiber; 54. Outgoing optical fiber; 6. Controller Detailed Implementation

[0014] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0015] Example 1 like Figure 1 and Figure 2 As shown, this application provides a laboratory variable-angle spectroscopic observation device for simulating asteroid rotation, which can adjust the rotation speed of the asteroid miniature model and the integration time of the spectral measurement while observing, including: Circular guide rail 1 has a scale indicating angles on its circular surface; The slides 2 mounted on the circular guide rail 1 can move horizontally along the circular ring on the circular guide rail 1, and there are at least two of them.

[0016] Rotating component 3 is used to drive the miniature asteroid model to rotate at the required speed. Rotating component 3 includes: Two electric rotating shafts 31 are coaxially arranged in the vertical direction, with a certain distance between them. The axes of the two electric rotating shafts 31 pass through the center of the circular guide rail 1 and are perpendicular to the plane on which the circular guide rail 1 is located. Each electric rotating shaft 31 is driven by a corresponding motor. The motors can adjust the rotational speed and direction of each electric rotating shaft 31 separately; the two electric rotating shafts 31 are fixed inside the ring of the circular guide rail 1 by rotating shaft brackets.

[0017] Two fixed posts 32 are detachably fixed to opposite ends of two coaxial electric rotating shafts 31, with their axes coinciding with the axes 31, allowing them to rotate with each shaft. Each fixed post 32 has a detachably fixed steel screw pin at its end, used to secure the miniature asteroid model from both top and bottom. The distance between the two pins can be adjusted by rotating the screws to accommodate miniature asteroid models of different sizes.

[0018] Support assembly 4, fixed above slide table 2, is the same number as slide tables 2 and is used to support and fix the optical fiber. The support assembly includes: Support bracket 41 is fixed above slide table 2 and its height is adjustable; The cage system 42, fixed to the support bracket 41, has the capability to connect optical fibers along its axis; the height of the axis of the cage system 42 should at least reach the midpoint between the opposite ends of the two fixed posts 32. The direction of the axis of the cage system 42 should be parallel to the plane of the circular guide rail 1.

[0019] Measurement components for illumination and spectral acquisition include: The spectrometer 51 has the function of adjusting the number of integrations and the single integration time during measurement; Light source 52 is used for illumination in the operating wavelength range of spectrometer 51; The incident optical fiber 53 is connected to the light source 52 at one end and fixed to a cage system 42 at the other end. The end fixed to the cage system 42 should point to the axis of the two fixed posts 32. The output fiber 54 is connected to the spectrometer 51 at one end and fixed to another cage system 42 at the other end. The end connected to the cage system 42 should point to the axis of the two fixed columns 32.

[0020] The controller 6 can control the single integration time and number of integrations of the spectrometer 51, as well as the rotation direction and speed of the two electric rotating shafts 31 respectively.

[0021] Example 2 like Figure 3 As shown, this application also provides a laboratory variable-angle spectroscopic observation method for simulating asteroid rotation. Based on the apparatus in Example 1, the laboratory spectroscopic observation for simulating asteroid rotation mainly includes the following process: S1: Confirm that the optical path is correctly connected, that is, connect the light source 52 and a cage system 42 with the incident fiber 53, and connect the other cage system 42 and the spectrometer 51 with the exit fiber 54.

[0022] S2: Turn on all electronic devices, including controller 6, rotating component 3, light source 52 and spectrometer 51.

[0023] S3: Secure the asteroid miniature model between the two fixed posts 32. Ensure that the height of the asteroid miniature model is the same as the height of the incident fiber 53 and the exit fiber 54.

[0024] S4: Set the angle between the two cage systems 42, i.e. the phase angle of the spectral measurement, to the target position. This can be achieved by adjusting the position of the slide 2 on the circular guide rail 1.

[0025] S5: Set the expected rotation speed of the two electric rotating shafts 31 through the controller 6. Note that the rotation direction and rotation speed of the two electric rotating shafts 32 should be consistent so that the miniature asteroid model can start to rotate normally.

[0026] S6: Set the expected single integration time and number of integrations for the spectrometer 51 via controller 6.

[0027] S7: Start measuring the spectrum and obtain the measured spectral curves for the current asteroid miniature model under the shape, phase angle, single integration time, and number of integrations.

[0028] In this embodiment, each measured spectrum includes the effects of the set phase angle, single integration time, and number of integrations. By using different asteroid miniature models, the influence of asteroids of different shapes on the spectral measurement results can be obtained. After multiple measurements under various conditions, the influence of factors such as asteroid shape, the ratio of observation integration time to rotation period, and observation phase angle on the morphology of the spectral curves observed from asteroids can be analyzed.

[0029] This application employs a fixed column method to fix the measurement object, which can be used to fix a miniature asteroid model and then study the influence of the asteroid's own shape on the spectral curve morphology; it adopts controllable dynamic measurement, and the rotation speed of the miniature asteroid model and the number of integrations and the single integration time of spectral acquisition are controllable, which can be used to study the influence of different ratios of observation integration time to rotation period on the spectral curve morphology of the miniature asteroid model; it can measure the spectrum at different phase angles, which can then study the influence of different phase angles on the spectral curve morphology of the miniature asteroid model.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application, and should all be covered within the scope of the claims of this application.

Claims

1. A laboratory variable-angle spectroscopic observation device for simulating asteroid rotation, characterized in that, include: Circular guide rail; Two slides are mounted on the circular guide rail; the slides are capable of sliding along the circular guide rail. A rotating component, fixed within the ring space of the circular guide rail, is used to fix the miniature asteroid model on the axis of the circular guide rail and drive the miniature asteroid model to rotate at a set speed and direction. Two support assemblies of the same height; each of the support assemblies is fixed to one of the slides; light source; Spectrometer; An incident optical fiber is connected at one end to the light source and at the other end to one of the support components; The output optical fiber is connected at one end to the spectrometer and at the other end to another support assembly; the height of the ends of the input and output optical fibers fixed to the support assembly is the same as the height of the asteroid miniature model and is directly facing the asteroid miniature model; and A controller is used to control the spectrometer and to control the speed and direction of rotation of the asteroid miniature model driven by the rotating assembly.

2. The laboratory variable-angle spectroscopic observation device for simulating asteroid rotation according to claim 1, characterized in that, The surface of the circular guide rail has a scale indicating angles.

3. The laboratory variable-angle spectroscopic observation device for simulating asteroid rotation according to claim 1, characterized in that, The rotating component includes: Two electric rotating shafts are coaxially arranged in the vertical direction and are spaced a predetermined distance apart; the axes of the two electric rotating shafts coincide with the axis of the circular guide rail. Two motors are used to drive one of the electric shafts to rotate, respectively; Two fixed posts are detachably fixed to the opposite ends of the two electric rotating shafts, with their axes coinciding with the axes of the two electric rotating shafts respectively; and Two screw pins are detachably fixed to opposite ends of the fixing post to secure the miniature asteroid model from both above and below. Adjusting the screw of the screw pin can change its length.

4. The laboratory variable-angle spectroscopic observation device for simulating asteroid rotation according to claim 1, characterized in that, The support assembly includes: A support bracket fixed above the slide table; and A cage system fixed above the support bracket is used to fix one end of the incident optical fiber or the outgoing optical fiber; the axis of the cage system is parallel to the plane of the circular guide rail.

5. A laboratory variable-angle spectroscopic observation method for simulating asteroid rotation, implemented based on the apparatus described in any one of claims 1-4, the method comprising: Step 1: Connect one end of the incident optical fiber to the light source, and fix the other end to a bracket assembly; Connect one end of the output optical fiber to the spectrometer and fix the other end to another bracket assembly; Step 2: Turn on the controller, rotating assembly, light source, and spectrometer; Step 3: Fix the miniature asteroid model onto the rotating assembly, with the height being the same as the height of the ends of the incident and outgoing optical fibers fixed on the support assembly. Step 4: Adjust the position of the slide on the circular guide rail so that the phase angle of the spectral measurement reaches the set angle; Step 5: The controller controls the rotating component to drive the miniature asteroid model to rotate at the set speed and direction; Step 6: Set the controller to the expected single integration time and number of integrations for the spectrometer; Step 7: Start measuring the spectrum and obtain the spectral curves measured under the current shape, phase angle, single integration time and number of integrations of the asteroid miniature model.

Images