An integrated irradiation simulation unit

Abstract

The application relates to an integrated irradiation simulation unit and relates to the field of measuring equipment, which comprises a light source assembly, a heat dissipation bottom plate, temperature control films and a radiation plate, the heat dissipation bottom plate and the radiation plate are both regular hexagonal honeycomb structures, a plurality of temperature control films are embedded between the heat dissipation bottom plate and the radiation plate, and a plurality of long strip-shaped light source assemblies are fixedly connected around the regular hexagonal honeycomb structures; five LED lamps are fixedly connected in the light source assembly along the length direction at intervals; the light source assemblies in the unit are independently controlled in three groups so that the LED lamps in each group of light source assemblies are simultaneously turned on and off and the brightness is adjusted; the application has the advantages of realizing integrated quantitative simulation of light sources and cold backgrounds, increasing simulated states of simulation measurement and improving the measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of measurement equipment technology, and in particular to an integrated irradiation simulation unit. 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 add background interference to improve measurement accuracy, how to process large amounts of data, and how to achieve rapid measurement.

[0004] Therefore, to address the above shortcomings, an integrated irradiation simulation unit is needed. Summary of the Invention

[0005] (a) Technical problems to be solved The technical problem to be solved by this invention is to address the issues of low irradiation accuracy, uneven cold background, and poor system integration in traditional optical measurement environment simulation.

[0006] (II) Technical Solution To address the aforementioned technical problems, this invention provides an integrated irradiation simulation unit, comprising a light source assembly, a heat dissipation base plate, a temperature control film, and a radiation plate. Both the heat dissipation base plate and the radiation plate are hexagonal honeycomb structures. Several temperature control films are embedded between the heat dissipation base plate and the radiation plate. Several elongated light source assemblies are fixed around the hexagonal honeycomb structure. Five LEDs are fixedly connected at intervals along the length of each light source assembly. The light source assemblies within the unit are divided into three groups for independent control, allowing the LEDs in each group to be turned on and off simultaneously and their brightness adjusted.

[0007] As a further explanation of the present invention, preferably, each temperature control film is electrically connected to the control system via a cable to independently control the temperature, and thermally conductive silicone grease is applied between the temperature control film and the heat dissipation base plate and the radiation plate.

[0008] As a further explanation of the present invention, preferably, the heat dissipation base plate is made of aluminum alloy, and heat dissipation pipes are provided inside the heat dissipation base plate.

[0009] (III) Beneficial Effects The above-described technical solution of the present invention has the following advantages: This invention uses LED combined light sources to achieve quantitative simulation of Earth's reflected solar radiation and atmospheric scattering in the visible light band. Temperature-controlled films are set at the intervals between the light sources to achieve uniform and controllable cold background simulation. A set of light sources and temperature-controlled films are arranged at intervals to form an irradiation simulation unit. Each unit is designed with unified power supply, control and heat dissipation pipelines to achieve integrated irradiation simulation unit design. Attached Figure Description

[0010] Figure 1 This is a diagram illustrating the combined effect of the units in this invention; Figure 2 This is a structural diagram of the light source component of the present invention; Figure 3 This is a diagram showing the installation position of the temperature control film of the present invention; Figure 4 This is a structural diagram of the radiating plate of the present invention.

[0011] In the diagram: 1. Light source assembly; 11. LED lamp; 2. Heat dissipation base plate; 3. Temperature control film; 4. Radiation plate; 41. Temperature sensor. Detailed Implementation

[0012] 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.

[0013] An integrated irradiation simulation unit, combined with Figure 1 , Figure 3 The system includes a light source assembly 1, a heat dissipation base plate 2, a temperature control film 3, and a radiation plate 4. Four temperature control films 3 are embedded between the heat dissipation base plate 2 and the radiation plate 4, and six elongated light source assemblies 1 are fixed around the heat dissipation base plate 2 and the radiation plate 4. The nineteen units can be combined into an integrated large regular hexagon as an irradiation simulation system.

[0014] Combination Figure 1 , Figure 2The light source component 1 includes LED lamps 11 and a bracket. LED lamps 11 are selected from high-brightness, high-color-rendering, and low-light-decay visible light LEDs, with a color rendering index Ra≥90 and a spectral range covering 400~760nm, highly matching the visible light band of solar radiation to ensure spectral consistency in irradiation simulation. LED lamps 11 can be packaged in a high-power surface-mount manner, with a single LED power of 3W, balancing brightness output and heat dissipation, thus solving the problem of limited brightness of a single LED. The bracket is a long strip of aluminum-based copper-clad laminate, with five LED lamps 11 fixedly connected at intervals along the length of the bracket. The bracket has a thermal conductivity ≥2.0W / (M·K), which can quickly transfer the heat generated by the LED lamps 11 to the heat dissipation base plate, avoiding light decay and lifespan reduction.

[0015] Combination Figure 1 , Figure 3 The heat dissipation base plate 2 has a regular hexagonal honeycomb structure. The preferred material for the heat dissipation base plate 2 is 6061 aluminum alloy. The entire heat dissipation base plate 2 undergoes hard anodizing treatment to improve surface corrosion resistance and wear resistance, extending its service life. The interior of the heat dissipation base plate 2 uses CNC milling to machine serpentine coolant channels, ensuring uniform heat dissipation in each area. The inner walls of the channels are passivated to prevent coolant corrosion and improve sealing. The upper surface of the heat dissipation base plate 2 is finely ground and adheres to the temperature control film 3. The lower surface can be reinforced with ribs to increase the structural strength of the heat dissipation base plate 2 while ensuring sufficient heat dissipation area, preventing deformation due to coolant pressure.

[0016] Combination Figure 1 , Figure 3 The temperature control film 3 is a semiconductor cooling / heating integrated temperature control film with a thickness of ≤0.5mm, good flexibility, and can tightly adhere to the surface of the radiating plate 4. The operating temperature range of the temperature control film 3 is -20℃ to 50℃, with a temperature control accuracy of ±0.5℃, meeting the precise temperature control requirements of cold backgrounds in optical measurements. The temperature control film 3 adopts an electrode extension design, with a reserved aviation plug interface on the electrode end for easy connection to the control circuit. Four temperature control films 3 are spaced apart between a single heat sink 2 and the radiating plate 4. Each temperature control film 3 is electrically connected to the control system via a cable to independently control its temperature, thereby improving temperature control accuracy and avoiding temperature dead zones in the cold background. Thermal grease is applied between each temperature control film 3 and the heat sink 2 and radiating plate 4 to improve the thermal conductivity between the temperature control film 3 and the radiating plate 4 and heat sink 2.

[0017] Combination Figure 1 , Figure 4The radiant plate 4 has a regular hexagonal honeycomb structure. The upper surface of the radiant plate 4 is anodized to improve its emissivity, ensuring that the cooling energy from the temperature control film 3 can be uniformly radiated to form a cool background. The lower surface of the radiant plate 4 is precision ground to a surface roughness Ra≤0.8μm, ensuring a tight fit with the temperature control film 3. A temperature sensor 41 is installed inside the radiant plate to monitor temperature changes in real time. The LED light 11, the temperature control film 3, and the temperature sensor 41 are all electrically connected to the control system.

[0018] The control system uses the STM32F407 series microcontroller (MCU) as its core. This chip boasts high processing speed and rich peripherals, capable of simultaneously processing multiple control signals and sensor acquisition signals. It is paired with an LED constant current drive module and a temperature control thin-film PWM drive module. The LED constant current drive module provides an independent channel for each light source group, with a constant current accuracy of ±1mA, enabling precise adjustment of the light source brightness. The temperature control thin-film PWM drive module provides an independent channel for each temperature control film, with a PWM adjustment frequency of 1kHz, achieving continuous temperature adjustment.

[0019] like Figure 1 As shown, considering the advantages of high strength, good compressive strength, and easy expansion of the honeycomb structure, the distribution shape of the light source component 1 is designed as a regular hexagon. Considering that the maximum reflected irradiance of the Earth can reach 0.3 solar constants, and that the irradiance of a single LED bead is relatively small, a large number of light sources are combined, and 19 units are combined into a large regular hexagon as an irradiation simulation system. The light source component 1 is arranged at the edge of each regular hexagon. In addition, to improve the control accuracy of the light source, the light source component 1 in each irradiation simulation unit is divided into 3 groups of control, each group is controlled independently, and the light source component 1 in each group can be turned on, turned off, or have its brightness adjusted simultaneously. The temperature control film 3 in each regular hexagonal area can also be controlled independently, and can be turned on, turned off, or have its temperature adjusted simultaneously.

[0020] This system employs a PID closed-loop control algorithm as its core control principle, combined with multi-sensor data acquisition, to achieve real-time and precise control of light source irradiance and cold background temperature. Furthermore, standardized power supply and communication design ensures unit integration and interchangeability. 1. Irradiation Simulation Execution: Based on the target irradiance intensity and brightness ratio, the MCU sends a control signal to the LED constant current drive module. The drive module provides a stable constant current power supply to the corresponding light source component 1, realizing the turning on of the light source and brightness adjustment. The combined output of multiple sets of LED beads forms the target irradiance intensity. The honeycomb hexagonal arrangement ensures the uniformity of the irradiation area. Three independently controlled light sources achieve differentiated irradiation according to preset ratios, simulating the optical characteristics of the Earth reflecting solar radiation and atmospheric scattering.

[0021] 2. Cold Background Simulation Execution: The MCU simultaneously sends control signals to the temperature control film PWM drive module. The drive module provides precise PWM drive current to the temperature control film 3 in each hexagonal region, realizing the cooling and temperature regulation of the temperature control film 3. The cooling energy of the temperature control film is transferred to the radiating plate 4 through high thermal conductivity silicone grease. The radiating plate 4 evenly radiates the cooling energy to form a cold background. The waste heat generated by the operation of the temperature control film 3 is transferred to the heat dissipation base plate 2 through thermal conductivity silicone grease and is promptly carried away by the circulating coolant, ensuring the stability of the cold background temperature.

[0022] During this process, the heat dissipation system works continuously. Users can adjust the coolant flow rate through the flow regulating valve of the heat dissipation pipeline according to the system's operating status. When the light source is operating at full power or the temperature control film is deeply cooling, the flow rate can be appropriately increased to improve heat dissipation efficiency and ensure that the internal temperature of the system is always controlled below 60°C to achieve thermal balance.

[0023] Temperature sensor 41 and other sensors outside the irradiation simulation system acquire data such as the actual irradiation intensity of the irradiated area, the actual temperature of the cold background, and the flow rate and pressure of the coolant in real time with a 100ms acquisition period, and transmit the data to the MCU. The MCU compares the actual data with the target data. If a deviation occurs, it immediately calculates the adjustment amount through the PID algorithm and corrects the output current of the LED constant current drive module and the output duty cycle of the temperature control thin film PWM drive module in real time to achieve closed-loop regulation and ensure simulation accuracy.

[0024] In summary, this invention can achieve quantitative simulation of visible light irradiance within the range of 0 to 0.3 solar constants, with an adjustment step of 0.001 solar constants and an irradiance accuracy of ±0.01 solar constants, perfectly matching the intensity range of solar radiation reflected by the Earth. The honeycomb hexagonal light source arrangement structure ensures a uniformity of ≥95% in the irradiation area, eliminating irradiation dead zones and avoiding optical measurement errors caused by uneven irradiation. The three independent light source control designs enable differentiated irradiance simulation, adapting to different atmospheric scattering and Earth reflection scenarios, thus improving the scenario coverage of the simulation.

[0025] The cold background simulation of this invention utilizes a temperature-controlled film 3, which allows for temperature control within a range of -20℃ to 50℃ with a temperature control accuracy of ±0.5℃. Each hexagonal region of the temperature-controlled film 3 is independently controlled, enabling regional temperature adjustment of the cold background and meeting the simulation requirements of complex cold backgrounds. The anodizing blackening treatment of the radiation plate 4 ensures a cold background uniformity of ≥90%, guaranteeing background consistency in optical measurements. The arrangement design of the light source assembly 1 and the temperature-controlled film 3, combined with an efficient heat dissipation system, effectively avoids interference from the light source heat on the cold background, solving the thermal crosstalk problem encountered when irradiation and a cold background coexist in traditional equipment, and ensuring the stability of the cold background simulation.

[0026] Furthermore, this invention integrates irradiation simulation and cold background simulation into the same unit, which can work simultaneously and be independently controlled, realizing the coordinated simulation of quantitative irradiation and controllable cold background. It perfectly reproduces the actual environment in optical measurement where the Earth reflects solar radiation, atmospheric scattering and cold background coexist, providing an accurate environmental simulation platform for optical measurement and improving the accuracy and reliability of optical measurement results from the source.

[0027] 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. An integrated irradiation simulation unit, characterized in that: The unit includes a light source assembly (1), a heat dissipation base plate (2), a temperature control film (3), and a radiation plate (4). The heat dissipation base plate (2) and the radiation plate (4) are both regular hexagonal honeycomb structures. Several temperature control films (3) are embedded between the heat dissipation base plate (2) and the radiation plate (4). Several long strip-shaped light source assemblies (1) are fixed around the regular hexagonal honeycomb structure. Five LED lights (11) are fixedly connected at intervals along the length direction inside the light source assembly (1). The light source assembly (1) in the unit is divided into three groups for independent control so that the LED lights (11) in each group of light source assembly (1) can be turned on and off and their brightness adjusted at the same time.

2. The integrated irradiation simulation unit according to claim 1, characterized in that: Each temperature control film (3) is electrically connected to the control system via a cable to independently control the temperature. Thermal grease is applied between the temperature control film (3) and the heat dissipation base plate (2) and the radiation plate (4).

3. The integrated irradiation simulation unit according to claim 2, characterized in that: The heat dissipation base plate (2) is made of aluminum alloy and has heat dissipation pipes inside.

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