Portable star sensor sun evasion performance testing device

Abstract

The utility model discloses a portable star sensor sun evasion performance testing device. The portable star sensor sun evasion performance testing device comprises a supporting mechanism, an angle adjusting mechanism and a light source module, the supporting mechanism is a total station tripod, and the angle adjusting mechanism is mounted on a top platform of the total station tripod; the driving end of the angle adjusting mechanism is connected with the light source module; and the light source module is connected with the portable power supply. The device has the advantages that the device comprises the light source module, the angle adjusting mechanism and the supporting mechanism, the light source module provides a light source, the angle adjusting mechanism adjusts the angle of the light source module, the supporting mechanism adopts a total station tripod and is convenient to carry, and the whole device can be rapidly arranged and put into use in the field; and carrying out sun avoidance performance test on the star sensor.

Description

Technical Field

[0001] This utility model relates to the field of star sensor performance testing, specifically to a portable star sensor solar avoidance performance testing device. Background Technology

[0002] Star sensor performance testing, especially solar avoidance performance testing, is typically conducted at night or at dusk to prevent stray light interference. Currently, existing solar simulators are used to simulate the sun illuminating the star sensor from outer space at different angles. These simulators need to simulate the real sun's irradiance, collimation angle, spectral characteristics, irradiance stability, uniformity, and different illumination angles relative to the star sensor. When the irradiance of an existing solar simulator exceeds one solar constant, the collimation angle of the emitted light is generally difficult to exceed 0.3 to 0.5 times the solar collimation angle; when the collimation angle reaches the solar collimation angle, the irradiance of the solar simulator is generally only 0.1 to 0.3 times the solar constant. Therefore, existing solar simulators that meet realistic requirements require an illumination angle adjustment device, which makes the entire device relatively complex, bulky, and inconvenient to carry. This makes them suitable only for use in laboratories or other relatively fixed environments, and not for field testing.

[0003] Therefore, it is necessary to improve existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a portable star sensor solar avoidance performance testing device, which aims to improve the portability of the device and make it suitable for field testing.

[0005] The technical solution adopted in this utility model is: a portable star sensor solar avoidance performance testing device, including a support mechanism, an angle adjustment mechanism and a light source module;

[0006] The support mechanism is a total station tripod, and the top platform of the total station tripod is equipped with an angle adjustment mechanism;

[0007] The drive end of the angle adjustment mechanism is connected to the light source module;

[0008] The light source module is connected to a portable power supply.

[0009] According to the above scheme, the portable power source is a lithium battery pack.

[0010] According to the above scheme, the light source module includes a housing, a glass cover, and an LED light source board;

[0011] The housing has an internal cavity with an opening at the front end, and the opening of the cavity is sealed by a glass cover; a portable power supply is connected to the rear end of the housing.

[0012] The LED light source board is installed inside the cavity; the LED light source board is connected to a portable power supply via a power control board.

[0013] LED beads are arranged on the LED light source board, and the LED beads emit collimated light to the outside of the housing through the glass cover.

[0014] According to the above scheme, the light source module also includes a TIR total internal reflection lens group installed in the cavity. The TIR total internal reflection lens group includes multiple TIR total internal reflection lenses adapted to LED beads. The TIR total internal reflection lenses are located between the LED bead emitting end and the glass cover plate.

[0015] According to the above scheme, the portion of the TIR total internal reflection lens located at the front end of the LED lamp bead is retracted inward to form a transmissive convex curved surface; the outer surface of the TIR total internal reflection lens is a total reflection curved surface.

[0016] According to the above scheme, the outer surface of the glass cover is coated.

[0017] According to the above scheme, the light source module also includes a brightness control switch and a charging port installed on the housing; the brightness control switch and the charging port are respectively connected to a portable power supply through a power control board.

[0018] According to the above scheme, the angle adjustment mechanism includes a base, a worm gear assembly, and a mounting plate;

[0019] The base is fixed to the top platform of the total station tripod; the worm gear assembly is installed on the base, the input end of the worm gear assembly is connected to the manual adjustment knob, and the output end of the worm gear assembly is connected to the mounting plate, and the worm gear assembly drives the mounting plate to rotate; the light source module is fixed on the mounting plate.

[0020] According to the above scheme, the mounting plate is also provided with a first tilt angle dial.

[0021] According to the above scheme, the worm gear assembly includes a worm and a worm wheel; one end of the worm is connected to an adjustment knob, the worm meshes with the worm wheel, and the worm wheel shaft is connected to a mounting plate.

[0022] The beneficial effects of this utility model are as follows:

[0023] 1. This utility model includes a light source module, an angle adjustment mechanism, and a support mechanism. The light source module provides the light source, the angle adjustment mechanism adjusts the angle of the light source module, and the support mechanism adopts a total station tripod, which is easy to carry. The entire device can be quickly deployed and put into use in the field to test the solar avoidance performance of star sensors.

[0024] 2. This utility model adopts a manual angle adjustment mechanism, which is simple and highly accurate in achieving the goal of simulating sunlight to irradiate the star sensor at different angles.

[0025] 3. In this utility model, the light source module, together with high-power LED beads and TIR total internal reflection lens, can make the irradiance of the star sensor light entrance reach a solar constant, and can simulate a certain collimation performance of the light, thus ensuring the normal conduct of the star sensor solar avoidance performance test.

[0026] 4. The light source module of this utility model is equipped with a rechargeable, long-endurance portable lithium battery pack, which is convenient for the long-term use of the device in the field. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0028] Figure 2 This is a cross-sectional view of the light source module in this embodiment.

[0029] Figure 3 This is a schematic diagram of the angle adjustment mechanism in this embodiment.

[0030] Figure 1 In the middle: 1-1, Light source module; 1-2, Portable power supply; 1-3, Angle adjustment mechanism; 1-4, Total station tripod; 1-5, Top platform.

[0031] Figure 2 In the middle: 2-1, housing; 2-2, glass cover plate; 2-3, LED light source board; 2-4, TIR total internal reflection lens; 2-4-1, total reflection curved surface; 2-4-2, transmission convex curved surface; 2-5, brightness control switch; 2-6, charging port; 2-7, power control board.

[0032] Figure 3 In the middle: 3-1, mounting plate; 3-2, fixing screw holes; 3-3, worm gear assembly; 3-4, first tilt angle dial; 3-5, second tilt angle dial; 3-6, manual adjustment knob; 3-7, base. Detailed Implementation

[0033] To better understand this utility model, it will be further described below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1 The portable star sensor solar avoidance performance testing device shown includes a support mechanism, an angle adjustment mechanism 1-3, and a light source module 1-1;

[0035] The support mechanism is a total station tripod 1-4. The bottom of the total station tripod 1-4 is fixed to the ground, and the angle adjustment mechanism 1-3 is installed on the top platform of the total station tripod 1-4.

[0036] The driving end of the angle adjustment mechanism 1-3 is connected to the light source module 1-1, which drives the light source module 1-1 to rotate, thereby realizing the continuous adjustment of the light source module 1-1's illumination from 0° horizontally to 90° downward, simulating different angles of sunlight.

[0037] The light source module 1-1 is connected to the portable power supply 1-2, so the device does not require additional power on site and is easy to use.

[0038] In this invention, the pitch angle of the light source module 1-1 is adjusted using the angle adjustment mechanism 1-3 to simulate the effect of sunlight irradiation in outer space. The portable power supply 1-2 is a lithium battery pack that can be charged and discharged multiple times, providing power to the light source module 1-1 in the field, and can provide continuous power for more than 2 hours on a single charge.

[0039] Preferably, such as Figure 2 As shown, the light source module 1-1 includes a housing 2-1, a glass cover plate 2-2, and an LED light source board 2-3;

[0040] The housing 2-1 has a cavity with an opening at the front end, and the opening end of the cavity is closed by a glass cover plate 2-2; the rear end of the housing 2-1 is connected to the portable power supply 1-2.

[0041] The LED light source board 2-3 is installed inside the cavity; the LED light source board 2-3 is connected to the portable power supply 1-2 through the power control board 2-7.

[0042] LED beads are arranged in an array on the LED light source board 2-3, and the LED beads emit light to the star sensor outside the housing 2-1 through the glass cover plate 2-2.

[0043] In this invention, the power of the LED beads on the LED light source board 2-3 is 180W to ensure the irradiance of the outgoing collimated light, so that the irradiance of the light entering the star sensor reaches a solar constant.

[0044] In this invention, the glass cover plate 2-2 is coated (coating can be done on the outer side) to achieve ultraviolet spectrum cutoff and fit the visible light and near-infrared spectrum to approximate the solar spectrum curve.

[0045] Preferably, the light source module 1-1 further includes a TIR total internal reflection lens group installed in the housing 2-1 for collimating the LED beads; the TIR total internal reflection lens group includes a plurality of TIR total internal reflection lenses 2-4 adapted to the LED beads, and the TIR total internal reflection lenses 2-4 are disposed between the LED bead emitting end of the LED light source board 2-3 and the glass cover plate 2-2.

[0046] In this invention, the portion of the TIR total internal reflection lens 2-4 located at the front end of the LED bead retracts inward to form a transmissive convex surface 2-4-2; the outer surface of the TIR total internal reflection lens 2-4 is a total reflection surface 2-4-1. Both the transmissive convex surface 2-4-2 and the total reflection surface 2-4-1 of the TIR total internal reflection lens 2-4 are quadratic surfaces, and the curvature of the quadratic surfaces is calculated using simulation software; a single TIR total internal reflection lens 2-4 satisfies a collimation and focusing angle of less than 8° to simulate the effect of sunlight irradiation in outer space and meet performance testing requirements; the structure and function of the TIR total internal reflection lens 2-4 are mature technologies in the industry and will not be described in detail here.

[0047] Preferably, the light source module 1-1 further includes a brightness control switch 2-5, a charging port 2-6 mounted on the housing 2-1, and a power control board 2-7 mounted inside the housing 2-1; the brightness control switch 2-5 and the charging port 2-6 are respectively connected to the portable power supply 1-2 through the power control board 2-7.

[0048] In this invention, the brightness control switch 2-5 is used for switching on and off the LED light source board 2-3 and for brightness control; the charging port 2-6 charges the portable power supply 1-2 through the power control board 2-7.

[0049] Preferably, the angle adjustment mechanism 1-3 includes a base 3-7, a worm gear assembly 3-3, and a mounting plate 3-1;

[0050] The base 3-7 is fixed to the top platform 1-5 of the total station tripod 1-4 via quick-release threads; the worm gear assembly 3-3 is mounted on the base 3-7, the input end of the worm gear assembly 3-3 is connected to the manual adjustment knob 3-6, and the output end of the worm gear assembly 3-3 is connected to the mounting plate 3-1. The worm gear assembly 3-3 drives the mounting plate 3-1 to rotate, thereby achieving the rotation of the mounting plate 3-1. The rotation angle range meets the test requirements (typically the rotation angle range is from 0° horizontally to 90° downwards); the light source module 1-1 (specifically the housing 2-1 of the light source module 1-1) is fixed on the mounting plate 3-1.

[0051] Preferably, the mounting plate 3-1 is further provided with a first tilting dial 3-4 for connecting to the mounting plate 3-1 and for detecting and displaying the rotation angle of the mounting plate 3-1. In this invention, the first tilting dial 3-4 is provided with 5° rotation angle markings.

[0052] Preferably, the worm gear assembly 3-3 includes a worm and a worm wheel; one end of the worm is connected to a manual adjustment knob 3-6, the worm meshes with the worm wheel, and the worm wheel shaft is connected to the mounting plate 3-1; the structural configuration and function of the worm gear assembly 3-3 are mature technologies in the industry, and will not be described in detail here.

[0053] In this utility model, the manual adjustment knob 3-6 is provided with a second tilt angle dial 3-5 on the outside, and a 0.1° rotation angle marking is provided on the second tilt angle dial to realize the manual adjustment and control of the mounting plate 3-1 with a tilt angle accuracy of 0.05°.

[0054] In this invention, manually rotating the adjustment knob 3-6 causes the worm gear to rotate, which in turn causes the worm wheel meshing with the worm gear to rotate, driving the mounting plate 3-1 connected to the worm wheel to rotate. The pitch angle of the light source module 1-1 fixed on the mounting plate 3-1 changes accordingly, and precise angle control is achieved through two tilt scales, so that the tilt angle of the mounting plate 3-1 meets the test requirements.

[0055] Preferably, the support mechanism is a total station tripod 1-4, which can be easily carried by one person after being folded. The three legs of the total station tripod 1-4 can be quickly fixed to uneven ground in the field; based on the level bubble on the top platform 1-5 of the total station tripod 1-4, the legs can be easily adjusted to make the top platform 1-5 level; the height of the top platform 1-5 can be adjusted up and down, and the angle adjustment mechanism 1-3 and the light source module 1-1 installed on the top platform 1-5 can be quickly placed above the star sensor to simulate sunlight.

[0056] Example

[0057] like Figure 1 The portable star sensor solar avoidance performance testing device shown includes a light source module 1-1, an angle adjustment mechanism 1-3, and a total station tripod 1-4 as a support mechanism; the light source module 1-1 and the portable power supply 1-2 are assembled and installed on the angle adjustment mechanism 1-3, and the angle adjustment mechanism 1-3 is installed on the top platform 1-5 of the total station tripod 1-4.

[0058] like Figure 2As shown, the light source module 1-1 includes a housing 2-1, a glass cover plate 2-2, an LED light source board 2-3, a TIR total internal reflection lens group, a brightness control switch 2-5, a charging port 2-6, and a power control board 2-7. Multiple high-power LED beads are arrayed on the LED light source board 2-3. A TIR total internal reflection lens group is installed on the housing 2-1 in the direction of light source illumination (i.e., the direction of light source exit) to achieve collimation of the LED light. The curvature of the TIR total internal reflection lens 2-4 is calculated and manufactured using simulation software. Each TIR total internal reflection lens 2-4 must have a collimation and focusing angle of at least less than 8° to simulate the effect of sunlight illumination in outer space. The LED light source board 2-3 is mounted on the housing 2-1. A glass cover plate 2-2 is installed on the housing 2-1 in the direction of the light source exit. The glass cover plate 2-2 is coated for ultraviolet spectral cutoff to fit the LED visible and near-infrared spectral curves to approximate the solar spectrum. The power control board 2-7 is installed inside the housing 2-1. The housing 2-1 is equipped with a brightness control switch 2-5 and a charging port 2-6 for easy use and control.

[0059] like Figure 3 As shown, the angle adjustment mechanism 1-3 includes a mounting plate 3-1, a worm gear assembly 3-3, a first tilt angle dial 3-4, a second tilt angle dial 3-5, and a manual adjustment knob 3-6. The base 3-7 (with fixing screw holes 3-2) is bolted to the total station tripod 1-4. The manual adjustment knob 3-6 is connected to the worm gear assembly 3-3, allowing adjustment of the tilt angle of the mounting plate 3-1 within the range of 0 to 90° via the worm gear assembly 3-3. The first tilt angle dial 3-4 and the second tilt angle dial 3-5 enable control of tilt angle accuracy. The total station tripod 1-4 allows for rapid setup in the field, and the installation height and horizontal angle of the entire device can be adjusted via the total station tripod 1-4.

[0060] Example 2

[0061] The other configurations in this embodiment are the same as in Embodiment 1, except for the following: the total station tripod 1-4 is foldable. This embodiment also includes a storage box, in which the light source module 1-1, portable power supply 1-2, angle adjustment mechanism 1-3, and the folded total station tripod 1-4 are placed. The storage box in this embodiment is made of aluminum alloy, and its dimensions are 420mm x 320mm x 150mm, with a weight of approximately 3kg. The entire device is lightweight, compact, and easy to carry.

[0062] The working principle of this embodiment is as follows: When conducting a nighttime field test of the star sensor's solar avoidance performance, the staff brings the storage box to the test location, removes each component, opens and fixes the total station tripod 1-4 on the ground, levels the top platform 1-5, and installs the light source module 1-1, portable power supply 1-2, and angle adjustment mechanism 1-3 on the top platform 1-5 of the total station tripod 1-4. According to the test requirements, the angle of the light source module 1-1 is adjusted, the light source brightness is turned on and adjusted, and then the test is conducted to achieve preliminary verification of the solar avoidance performance. During the test, the irradiance of the star sensor's entrance light is required to reach a solar constant and meet the solar collimation accuracy requirements, which is achieved through brightness control of the light source module 1-1 and height adjustment of the top platform 1-5 of the total station tripod 1-4. The different illumination angles of the light source module 1-1 and the star sensor are achieved through the angle adjustment mechanism. After the test is completed, each component is disassembled and placed back into the storage box.

[0063] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0064] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable star sensor solar avoidance performance testing device, characterized in that, Includes a support mechanism, an angle adjustment mechanism, and a light source module; The support mechanism is a total station tripod, and the top platform of the total station tripod is equipped with an angle adjustment mechanism; The drive end of the angle adjustment mechanism is connected to the light source module; The light source module is connected to a portable power supply.

2. The portable star sensor solar avoidance performance testing device as described in claim 1, characterized in that, The portable power source is a lithium battery pack.

3. The portable star sensor solar avoidance performance testing device as described in claim 1, characterized in that, The light source module includes a housing, a glass cover, and an LED light source board; The housing has an internal cavity with an opening at the front end, and the opening of the cavity is sealed by a glass cover; a portable power supply is connected to the rear end of the housing. The LED light source board is installed inside the cavity; the LED light source board is connected to a portable power supply via a power control board. LED beads are arranged on the LED light source board, and the LED beads emit collimated light to the outside of the housing through the glass cover.

4. The portable star sensor solar avoidance performance testing device as described in claim 3, characterized in that, The light source module also includes a TIR total internal reflection lens group installed in the cavity. The TIR total internal reflection lens group includes multiple TIR total internal reflection lenses adapted to LED beads. The TIR total internal reflection lenses are located between the LED bead emitter and the glass cover plate.

5. The portable star sensor solar avoidance performance testing device as described in claim 4, characterized in that, The portion of the TIR total internal reflection lens located at the front end of the LED bead retracts inward to form a transmissive convex surface; the outer surface of the TIR total internal reflection lens is a total reflection surface.

6. The portable star sensor solar avoidance performance testing device as described in claim 3, characterized in that, The outer surface of the glass cover is coated.

7. The portable star sensor solar avoidance performance testing device as described in claim 5, characterized in that, The light source module also includes a brightness control switch and a charging port mounted on the housing; the brightness control switch and the charging port are respectively connected to a portable power supply through a power control board.

8. The portable star sensor solar avoidance performance testing device as described in claim 1, characterized in that, The angle adjustment mechanism includes a base, a worm gear assembly, and a mounting plate; The base is fixed to the top platform of the total station tripod; the worm gear assembly is installed on the base, the input end of the worm gear assembly is connected to the manual adjustment knob, and the output end of the worm gear assembly is connected to the mounting plate, and the worm gear assembly drives the mounting plate to rotate; the light source module is fixed on the mounting plate.

9. The portable star sensor solar avoidance performance testing device as described in claim 8, characterized in that, The mounting plate is also equipped with a first tilt angle dial.

10. The portable star sensor solar avoidance performance testing device as described in claim 8, characterized in that, The worm gear assembly includes a worm and a worm wheel; one end of the worm is connected to an adjustment knob, the worm meshes with the worm wheel, and the worm wheel shaft is connected to a mounting plate.

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