A system for simulating measurement of earth and atmospheric scattering properties

Abstract

The present application relates to a kind of earth and atmospheric scattering characteristic simulation measurement system, it is related to the field of measurement system, including support, radiation source simulation system and mobile platform, radiation source simulation system is erected on support, support is erected on mobile platform;Radiation source simulation system includes light source simulation system and cold background simulation system, light source simulation system provides visible light irradiation, cold background simulation system provides uniform cold background simulation, light source simulation system and cold background simulation system are integrally designed as flat array structure to have simulation uniformity and heat dissipation efficiency, the present application has the whole design of modularization, integration, mobility, realizes the quantitative simulation of earth albedo, atmospheric scattering and cold background, simultaneously, it is combined with accurate motion control and intelligent power control, constructs a set of the advantages of optical measurement background simulation system of adaptation multi-scene.

Description

Technical Field

[0001] This invention relates to the field of measurement system technology, and in particular to a simulation measurement system for the scattering characteristics of the Earth and atmosphere. Background Technology

[0002] Optical measurement is a non-contact measurement technique that uses some basic properties of light, such as reflection, interference, and scattering, to perform relevant precise measurements. Its main principle is to use the physical properties of light to detect the object being measured, and different measurement methods utilize different properties.

[0003] Optical measurement is widely used in various fields such as industry, medicine, environmental science, physics, agriculture and military, and has achieved many significant results. However, some challenges still exist, such as how to suppress background interference and improve measurement accuracy, how to process large amounts of data, and how to achieve rapid measurement.

[0004] Therefore, to address the above shortcomings, it is necessary to provide a simulation and measurement system for the scattering characteristics of the Earth and the atmosphere. Summary of the Invention

[0005] (a) Technical problems to be solved The technical problem to be solved by this invention is how to reduce irrelevant background interference and improve the accuracy of background simulation.

[0006] (II) Technical Solution To address the aforementioned technical problems, this invention provides a simulation and measurement system for Earth and atmospheric scattering characteristics, comprising a support frame, a radiation source simulation system, and a mobile platform. The radiation source simulation system is mounted on the support frame, and the support frame is mounted on the mobile platform. The radiation source simulation system includes a light source simulation system and a cold background simulation system. The light source simulation system provides visible light irradiance, and the cold background simulation system provides uniform cold background simulation. The light source simulation system and the cold background simulation system are integrated into a flat array structure to achieve both simulation uniformity and heat dissipation efficiency.

[0007] As a further explanation of the present invention, preferably, the light source simulation system consists of multiple groups of horizontally arrayed LED lights and a long strip-shaped fixing mechanism made of aluminum alloy. The LED lights are fixedly connected to the fixing mechanism at intervals. The fixing mechanism has a built-in brightness adjustment drive board and is electrically connected to the LED lights. Each group of LED lights and the fixing mechanism are independently controlled.

[0008] As a further explanation of the present invention, preferably, the cold background simulation system includes a radiation source and a temperature measurement system. The radiation source is a low-temperature blackbody radiation source, and the temperature measurement system consists of a distributed temperature sensor and a data transmission module. The temperature sensor is placed close to the radiation source to achieve real-time acquisition of temperature data.

[0009] As a further explanation of the present invention, preferably, the mobile platform consists of a symmetrical frame welded from square steel and steering wheels installed at the bottom of the four corners of the frame. A chassis is installed in the middle of the frame, and a heat dissipation system, a control cabinet and a power supply system are fixedly connected to the chassis.

[0010] As a further explanation of the present invention, preferably, the heat dissipation system includes a thin-film cooling source and a cooling fan. The thin-film cooling source is attached to the spacing between the LED lights to dissipate heat from the light source simulation system, and the cooling fan is mounted on a mobile platform with its air outlet facing the radiation source to dissipate heat from the cold background simulation system.

[0011] As a further explanation of the present invention, preferably, the bracket adopts a polygonal frame with an additional mesh structure to provide a connection position for the fixed installation of the radiation source simulation system while having load-bearing capacity.

[0012] (III) Beneficial Effects The above-described technical solution of the present invention has the following advantages: This invention, through its modular, integrated, mobile, and intelligent design, effectively overcomes the core problems in traditional optical measurement, such as insufficient background interference suppression, low measurement efficiency, difficult data processing, and poor scene adaptability. It achieves quantitative simulation and accurate measurement of the Earth and atmospheric scattering background, and significantly improves measurement accuracy, measurement efficiency, structural stability, heat dissipation performance, operational flexibility, scalability, intelligence level, and scene adaptability. It also has good engineering application value and industry promotion value. Attached Figure Description

[0013] Figure 1 This is a simplified assembly diagram of the present invention; Figure 2 This is a unit diagram of the light source simulation system of the present invention; Figure 3 This is the logic diagram of the cold background simulation system of the present invention.

[0014] In the diagram: 1. Support frame; 2. Radiation source simulation system; 21. Light source simulation system; 211. LED light; 212. Fixing mechanism; 22. Cold background simulation system; 221. Radiation source; 222. Temperature measurement system; 3. Mobile platform; 4. Heat dissipation system; 5. Control cabinet; 6. Power supply system. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] A simulation and measurement system for the scattering characteristics of the Earth and atmosphere, such as Figure 1 As shown, the system includes a support frame 1, a radiation source simulation system 2, and a mobile platform 3. The radiation source simulation system 2 is mounted on the support frame 1, and the support frame 1 is mounted on the mobile platform 3. The support frame 1 adopts a polygonal frame with an additional mesh structure to provide connection points for the fixed installation of the radiation source simulation system 2 while having load-bearing capacity. The radiation source simulation system 2 includes a light source simulation system 21 and a cold background simulation system 22. The light source simulation system 21 is located around the cold background simulation system 22. The light source simulation system 21 provides visible light irradiation, and the cold background simulation system 22 provides a uniform cold background simulation.

[0017] Combination Figure 1 , Figure 2 The light source simulation system 21 consists of multiple groups of horizontally arrayed LED lights 211 and a long strip-shaped fixing mechanism 212 made of aluminum alloy. The LED lights 2111 are fixedly connected to the fixing mechanism 212 at intervals. The aluminum alloy material combines lightweight and high strength, and also has good thermal conductivity, which can quickly conduct the working heat of the LED light source to the overall heat dissipation system. The fixing mechanism 212 has a built-in brightness adjustment driver board and is electrically connected to the LED lights 211; each group of LED lights 211 and the fixing mechanism 212 are independently controlled. The fixing mechanism 212 has water channels that are directly connected to the water cooling pipes of the overall heat dissipation system, and this mechanism is fixed to the mobile platform 3 along with the system bracket 1, which can realize synchronous movement with the mobile platform 3.

[0018] Combination Figure 1 , Figure 3The cold background simulation system 22 includes a radiation source 221 and a temperature measurement system 222. The radiation source 221 is a low-temperature blackbody radiation source. The temperature measurement system 222 consists of distributed temperature sensors and a data transmission module. The temperature sensors are attached to the working surface of each cooling source component and connected to the power supply and control system PLC via shielded wires to achieve real-time acquisition and feedback of temperature data. The light source simulation system 21 and the cold background simulation system 22 are integrated through welding and splicing to form a complete flat array frame. The heat dissipation interface is uniformly arranged on the back of the frame and is connected to the piping of the overall heat dissipation system 4 using quick-connect fittings for easy installation and maintenance. The electrical wiring of all LED lights 211 and radiation sources 221 is integrated in the wire grooves inside the frame and connected to the radiation source drive system of the power supply and control system via shielded wires to achieve modular independent control.

[0019] like Figure 1 As shown, the frame of the mobile platform 3 is made of Q355 high-strength square steel tubing through a full welding process. The completely symmetrical frame design ensures the overall rigidity of the frame without the risk of deformation. A thickened steel plate chassis, preferably 20mm thick, is bolted to the middle of the frame, providing a mounting base for the cooling system 4, control cabinet 5, and power system 6. This also lowers the overall center of gravity of the system, improving stability during movement. Two sets of four Mecanum steering wheels are symmetrically arranged at the bottom of the frame, one set at the front and one at the rear. Each set has two steering wheels symmetrically distributed. The steering wheels are connected to the frame via shock-absorbing brackets with built-in rubber shock-absorbing pads, effectively buffering bumps during movement and preventing component misalignment or loosening of wiring in the upper modules due to vibration. The mobile platform 3 is equipped with a multi-drive system. Each steering wheel is driven by an independent servo motor. The servo motor is connected to the steering wheel via a reducer and has a built-in encoder, enabling precise control of speed and direction. The electrical circuitry of the multi-drive system is connected to the mobile platform control module of the power supply and control system, and differential speed control of the steering wheels is achieved through a PLC.

[0020] The heat dissipation system 4 consists of a thin-film cooling source and a cooling fan. The thin-film cooling source is attached to the intervals between LED lights 211 to dissipate heat from the light source simulation system 21. The cooling fan is mounted on the mobile platform 3, with its air outlet facing the radiation source 221 to dissipate heat from the cold background simulation system. The heat dissipation system 4 is fixed to the inside of the vehicle frame of the mobile platform 3 with bolts and seamlessly connected to the light source simulation system 21 and the cold background simulation system 22 through a heat dissipation interface, achieving unified heat absorption and dissipation. The entire heat dissipation system moves with the mobile platform, ensuring uninterrupted heat dissipation during movement.

[0021] Power system 6 connects to the mains power and includes a built-in air switch, leakage current protector, and surge protector to ensure mains power access and overload / leakage protection. Power system 6 converts 380V mains power to the required 24V and 48V DC voltages for the system, powering components such as LED lamp 211, thin-film cooling source, servo motor, and PLC in control cabinet 5. Control cabinet 5 houses a distributed radiation source drive system and a ground radiation source simulation control module, responsible for adjusting the brightness of LED lamp 211 and the temperature of the thin-film cooling source components, respectively. Control cabinet 5 also includes a mobile platform control module, responsible for driving the servo motor and controlling the steering wheel's movement. Control cabinet 5 contains a central control system PLC, which uses an industrial-grade programmable logic controller and serves as the core control unit of the system, with built-in data acquisition, analysis, and storage modules.

[0022] When measurements are required, parameters such as Earth's reflectivity, atmospheric scattering intensity, and cold background temperature are input according to the testing requirements of optical measurements. Preset simulation scenarios can also be selected, such as equatorial Earth albedo, mid-latitude atmospheric scattering, and deep-space cold background. The system has multiple built-in standardized scenario parameters that can be directly called upon. The PLC sends the set brightness parameters to the radiation source drive system, driving each LED 211 to adjust to the set brightness. Simultaneously, the temperature parameters are sent to the Earth radiation source simulation control module, driving each thin-film cooling source component to begin cooling. The temperature measurement system 222 collects the cooling source temperature in real time and feeds it back to the PLC, achieving temperature pre-adjustment.

[0023] Subsequently, the coordinate parameters of the test area, the movement speed of the mobile platform, and the angle tracking accuracy are input. The PLC stores the coordinate parameters and movement speed in the data module to prepare for the subsequent positioning and movement of the mobile platform 3. At the same time, the data acquisition frequency and storage path are set to ensure real-time data acquisition and storage during the measurement process. After the parameters are set, the PLC controls the movement of the mobile platform 3 according to the preset coordinate parameters, achieving precise positioning of the system in the test area, while simultaneously driving the radiation source simulation system 2 and the support 1 to move synchronously.

[0024] The central control PLC calculates the rotational speed and direction of each steering wheel based on the input test point coordinates using a motion control algorithm, and sends motion commands to the mobile platform control module. The mobile platform 3 control module converts these commands into drive signals for the servo motors, driving the four Mecanum steering wheels to move at the set rotational speed and direction. Subsequently, the mobile platform 3 moves towards the test point according to the preset speed and path. The encoders on the steering wheels collect motion data in real time, feeding back the actual position and speed to the PLC. The PLC compares the actual position with the set coordinates; if a deviation occurs, it immediately issues a correction command, adjusting the rotational speed and direction of the steering wheels to achieve closed-loop trajectory correction. When the mobile platform 3 reaches the designated test point, the PLC issues a stop command, the servo motors brake, and the steering wheels lock, achieving precise positioning of the mobile platform 3 with an accuracy of ±1mm. During movement, the overall cooling system 4 operates at low speed, providing basic heat dissipation for the light source and cooling source.

[0025] After the mobile platform 3 is positioned, the angle of the radiation source simulation system 2 is adjusted according to the detection angle of the optical measuring equipment to ensure a perfect match between the simulated background and the detection angle of the measuring equipment. The detection angle data of the optical measuring equipment is transmitted to the central control PLC in real time through the communication interface. The PLC converts the angle data into attitude adjustment commands for the mobile platform. If the detection angle of the measuring equipment changes, the PLC sends a zero-radius rotation command to the mobile platform control module, controlling the mobile platform 3 to rotate around its own center to the set angle, causing the radiation source simulation system 2 to adjust its attitude synchronously, so that the emission angle of the simulated background is perfectly matched with the detection angle of the measuring equipment. After adjustment, the steering wheel is locked again to maintain angle stability. The entire angle adjustment process has a response time of less than 0.5s and an angle tracking accuracy of ±0.1°, achieving real-time tracking of the background angle during the measurement process without measurement errors caused by angle deviation.

[0026] After the angle adjustment is completed, the formal measurement program is started. The radiation source simulation system 2 continuously outputs the set optical background, and the optical measurement equipment performs detection. At the same time, the power supply and control system realizes real-time monitoring and closed-loop adjustment of the system operation status.

[0027] This invention also provides two measurement examples: 1. An atmospheric scattering spectrometer carried by a certain type of low-orbit meteorological satellite, with a detection band of 400-1000nm, is used to monitor the scattering characteristics of atmospheric aerosols. Ground background simulation calibration must be completed before launch to meet the satellite sensor's radiometric calibration accuracy standard of ±3% to ±5%.

[0028] Traditional measurement methods use a fixed integrating sphere to simulate the Earth's albedo background, with brightness adjustment accuracy of only ±5 cd / m², a cold background simulation temperature error of ±3℃, and background parameter ambiguity leading to a measurement error of up to 12%. Furthermore, the detector's angle needs manual adjustment, with an angular deviation from the simulated background of ≥1°, and there is no angle follow-up function; single-angle calibration takes 1.5 hours. The entire process is also manual, requiring 8 hours for a single detector to be fully calibrated, resulting in extremely low efficiency and failing to meet batch calibration requirements.

[0029] Through the design of this invention, the modular LED light source achieves quantitative adjustment of Earth's reflectivity with an accuracy of ±1 cd / m², and the thin-film cooling source achieves quantitative simulation of cold background temperature with an accuracy of ±0.5℃. Simultaneously, the zero-radius rotation function of the moving platform 3 enables the angle tracking between the radiation source simulation system 2 and the detector to achieve an accuracy of ±0.1° and a response speed of <0.5s.

[0030] The measured data are shown in the table below: 2. A portable atmospheric particulate matter scattering monitor from an environmental monitoring agency needs to be tested in different outdoor settings such as urban suburbs and industrial parks to simulate atmospheric scattering gradients at different altitudes from 0 to 5 km.

[0031] Traditional methods can only simulate the intensity of scattering in a single atmosphere in the laboratory, and cannot achieve quantitative simulation of scattering gradients from 0 to 5 km. The gradient adjustment error is ±8%, which deviates significantly from the actual outdoor environment. Moreover, outdoor testing lacks dedicated background simulation equipment and relies on the natural environment. The measurement data is affected by ambient light interference, resulting in an error of up to 10%. The brightness, scattering intensity, and temperature data generated from outdoor testing are scattered across three acquisition devices, requiring 6 hours per day for manual processing and analysis, resulting in extremely low data processing efficiency.

[0032] The design of this invention uses a modular LED light source array to quantitatively simulate the atmospheric scattering gradient from 0 to 5 km, and the scattering characteristics at different heights can be reproduced by adjusting the brightness gradient of the light source in different regions.

[0033] The measured data are shown in the table below: In summary, this invention constructs an optical measurement background simulation system that integrates quantitative background simulation, precise motion control, intelligent thermal management, and efficient data processing through an integrated dual-simulation design of the radiation source simulation system, an omnidirectional motion heavy-load design of the mobile platform, a dual-adaptive design for the system support's load-bearing and installation capabilities, and a centralized intelligent control design for the power supply and control system. This system effectively overcomes the core technical challenges of traditional optical measurement, achieving qualitative improvements in measurement accuracy, measurement efficiency, structural stability, heat dissipation performance, and operational flexibility. It also possesses good scalability, maintainability, and scene adaptability, covering optical measurement needs across multiple fields.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A simulation and measurement system for the scattering characteristics of the Earth and atmosphere, characterized in that: The system includes a support (1), a radiation source simulation system (2), and a mobile platform (3). The radiation source simulation system (2) is mounted on the support (1), and the support (1) is mounted on the mobile platform (3). The radiation source simulation system (2) includes a light source simulation system (21) and a cold background simulation system (22). The light source simulation system (21) provides visible light irradiation, and the cold background simulation system (22) provides uniform cold background simulation. The light source simulation system (21) and the cold background simulation system (22) are integrated into a flat array structure to achieve both simulation uniformity and heat dissipation efficiency.

2. The simulation and measurement system for Earth and atmospheric scattering characteristics according to claim 1, characterized in that: The light source simulation system (21) consists of multiple groups of horizontally arrayed LED lights (211) and a long strip-shaped fixing mechanism (212) made of aluminum alloy. The LED lights (211) are fixedly connected to the fixing mechanism (212) at intervals. The fixing mechanism (212) has a built-in brightness adjustment drive board and is electrically connected to the LED lights (211). Each group of LED lights (211) and the fixing mechanism (212) are independently controlled.

3. The simulation and measurement system for Earth and atmospheric scattering characteristics according to claim 2, characterized in that: The cold background simulation system (22) includes a radiation source (221) and a temperature measurement system (222). The radiation source (221) is a low-temperature blackbody radiation source. The temperature measurement system (222) consists of a distributed temperature sensor and a data transmission module. The temperature sensor is attached to the radiation source (221) to realize the real-time acquisition of temperature data.

4. The simulation and measurement system for Earth and atmospheric scattering characteristics according to claim 3, characterized in that: The mobile platform (3) consists of a symmetrical frame welded from square steel and steering wheels installed at the bottom of the four corners of the frame. A chassis is installed in the middle of the frame, and a heat dissipation system (4), a control cabinet (5) and a power supply system (6) are fixed on the chassis.

5. The simulation and measurement system for Earth and atmospheric scattering characteristics according to claim 4, characterized in that: The heat dissipation system (4) includes a thin-film cooling source and a cooling fan. The thin-film cooling source is attached to the intervals of the LED lights (211) to dissipate heat from the light source simulation system (21). The cooling fan is mounted on the mobile platform (3) and the air outlet of the cooling fan faces the radiation source (221) to dissipate heat from the cold background simulation system (22).

6. The simulation and measurement system for Earth and atmospheric scattering characteristics according to claim 5, characterized in that: The bracket (1) adopts a polygonal frame with an additional mesh structure to provide a connection position for the fixed installation of the radiation source simulation system (2) while having load-bearing capacity.

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