Natural light multi-band spectral simulation light source device

Abstract

This invention provides a multi-band spectral simulation light source device for natural light, comprising an annular base with an LED light panel connected to the lower part of its hollow inner wall. The LED light panel has multiple LED light groups, each consisting of eight LEDs with different spectra illuminating vertically. A heat sink is fixed to the upper part of the hollow inner wall of the annular base, and multiple wire connectors connected to the LED light groups via wires are located in the middle of the heat sink. A circular top cover is attached to the annular base, and a PPFD sensor is located in the center of the circular top cover. Multiple air inlets are opened on the circular top cover surrounding the PPFD sensor. An intake fan is fixed to the top of the circular top cover corresponding to each air inlet. Air outlets and multiple power sockets are opened on the side wall of the circular top cover. The inner end of the power socket is connected to the wires on the wire connectors and the intake fan via wires, and the outer end is connected to a controllable power output terminal via wires. The controllable power input terminal and the PPFD sensor are connected to a host computer. This device can simulate the spectral distribution of natural light in different ecological zones.

Description

Technical Field

[0001] This utility model relates to the field of plant canopy photosynthesis measurement technology, specifically to a multi-band spectral simulation light source device for natural light. Background Technology

[0002] A plant canopy photosynthesis measurement system needs to efficiently and accurately measure core indicators of plant canopy photosynthetic phenotypes, such as photosynthetic rate, dark respiration rate, canopy photosynthetic carbon dioxide response parameters, and canopy photosynthetic light energy utilization efficiency, through efficient gas exchange, precise control of light intensity in the measuring chamber, and simulation of spectral proportions in different ecological zones. During measurement, light intensity must be controlled, as different light intensities will result in different trends in plant photosynthetic rates. Therefore, to better simulate the spectra of different ecological zones and achieve a unified standard for testing light environments, a multi-band spectral simulation light source device for natural light is urgently needed. Utility Model Content

[0003] To address the technical problem of achieving a unified standard for testing lighting environment in the measurement of plant canopy photosynthesis in order to better simulate the spectrum of different ecological regions, this utility model provides a multi-band spectrum simulation light source device for natural lighting.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A natural light multi-band spectrum simulation light source device includes an annular base. An LED light panel is fixedly connected to the lower part of the hollow inner wall of the annular base. Multiple LED light groups are arranged on the LED light panel, each LED light group comprising eight LEDs with different spectra vertically irradiated. A heat sink is fixedly connected to the upper part of the hollow inner wall of the annular base. Multiple wire connectors are provided in the middle of the heat sink, and wires on each wire connector are connected to a predetermined number of LED light groups on the LED light panel. A circular top cover is fastened to one side of the annular base. A PPFD sensor is fixedly installed in the center of the circular top cover. Multiple air inlets are opened on the circular top cover surrounding the PPFD sensor. An air intake fan is fixed inside the top of the circular top cover corresponding to each air inlet. Air outlets are opened on the side walls of the circular top cover. Multiple power sockets are also provided on the side walls of the circular top cover. The inner end of the power socket is connected to the wires on the wire connector and the air intake fan through a wire. The outer end of the power socket is connected to the output terminal of an existing controllable power supply through a wire. The input terminal of the controllable power supply and the PPFD sensor are both connected to a host computer.

[0006] Compared with existing technologies, the natural light multi-band spectrum simulation light source device provided by this utility model uses a PPFD sensor in the center of the circular top cover to monitor the PPFD of external natural light. The host computer adjusts the output current of the controllable power supply based on the monitored PPFD, thereby controlling the eight LEDs in each LED group on the LED light board to emit different wavelengths of light. The spectral range is 375-770nm, thus achieving spectral simulation of natural light in different ecological zones and achieving a unified standard for testing lighting environments or light intensity. Simultaneously, during operation, a suction fan draws in cool air from outside through the air inlet, exchanges it with the hot air on the heat sink surface, and then exhausts it through the air outlet, thereby dissipating heat from the LED light board and effectively improving the lifespan of the LED light groups.

[0007] Furthermore, the bottom of the annular base is provided with multiple positioning posts.

[0008] Furthermore, the heat sink is an aluminum plate, and multiple heat dissipation strips are formed on the surface of the aluminum plate by opening grooves.

[0009] Furthermore, the circular top cover surface is rotatably connected to multiple handles.

[0010] Furthermore, the intake fan is fixedly connected to the top of the circular top cover corresponding to the air intake hole by screws. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the natural light multi-band spectrum simulation light source device provided by this utility model, omitting the controllable power supply and the host computer.

[0012] Figure 2 yes Figure 1 A side view of the annular base and heat sink.

[0013] Figure 3 yes Figure 1 A schematic diagram of the structure from below, showing the central ring base and LED light panel.

[0014] In the diagram, 1. Circular base; 11. Positioning post; 2. LED light panel; 21. LED light group; 3. Heat sink; 31. Heat dissipation strip; 4. Wire connector; 5. Circular top cover; 51. Air inlet; 52. Air outlet; 53. Power socket; 54. Handle; 6. PPFD sensor; 7. Screw. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0016] Please refer to Figures 1 to 3As shown, this utility model provides a multi-band spectrum simulation light source device for natural light illumination, including an annular base 1. An LED light panel 2 is fixedly connected to the lower part of the hollow inner wall of the annular base 1. Multiple LED light groups 21 are arranged on the LED light panel 2, each LED light group 21 including eight LEDs with different vertically irradiated spectra. That is, the eight LEDs in each LED light group 21 emit different spectra, and therefore the color and intensity of each spectrum are also different. A heat sink 3 is fixedly connected to the upper part of the hollow inner wall of the annular base 1. Multiple wire connectors 4 are provided in the middle of the heat sink 3. Wires (multiple in parallel, not shown in the figure) on each wire connector 4 are connected to a predetermined number of LED light groups 21 on the LED light panel 2. A circular top cover 5 is fastened to the annular base 1 on one side of the heat sink 3. A PPFD (Photosynthetic Photon Flux) device is fixedly arranged in the middle of the circular top cover 5. The PPFD sensor 6 (Photosynthetic Photon Flux Density) specifically refers to the number of photons incident per unit area per unit time in the wavelength range of 400–700 nm, a core parameter for measuring effective light intensity in plant photosynthesis research. The PPFD sensor 6 has multiple air inlets 51 on its circular top cover 5, with a suction fan fixed to the top of each corresponding air inlet 51. Air outlets 52 are located on the surrounding side walls of the circular top cover 5, and multiple power sockets 53 are also provided on the side walls of the circular top cover 5. The inner end of each power socket 53 is connected to a wire connector 4 via a wire and a suction fan. The air fan is connected, so that external power can be supplied to the LED lights and the air fan via the power socket 53 and the wire. The outer end of the power socket 53 is connected to the output end of the existing controllable power supply via the wire. The input end of the controllable power supply and the PPFD sensor 6 are both connected to a host computer, such as a computer. The host computer is used to adjust the output current of the controllable power supply according to the external natural light PPFD monitored by the PPFD sensor 6, and then adjust the eight LEDs in each LED group on the LED light board 2 to emit different wavelengths of spectrum. The host computer can use the conventional voltage adjustment method to adjust the output current of the existing controllable power supply, so it will not be described in detail here.

[0017] Compared with existing technologies, the natural light multi-band spectrum simulation light source device provided by this utility model uses a PPFD sensor in the center of the circular top cover to monitor the PPFD of external natural light. The host computer adjusts the output current of the controllable power supply based on the monitored PPFD, thereby controlling the eight LEDs in each LED group on the LED light board to emit different wavelengths of light. The spectral range is 375-770nm, thus achieving spectral simulation of natural light in different ecological zones and achieving a unified standard for testing lighting environments or light intensity. Simultaneously, during operation, a suction fan draws in cool air from outside through the air inlet, exchanges it with the hot air on the heat sink surface, and then exhausts it through the air outlet, thereby dissipating heat from the LED light board and effectively improving the lifespan of the LED light groups.

[0018] For a specific embodiment, please refer to Figure 3 As shown, the bottom of the annular base 1 is provided with multiple positioning posts 11, which can be quickly and stably fixed on the top of the measuring box by inserting the positioning posts 11 into the positioning holes on the existing measuring box.

[0019] For a specific embodiment, please refer to Figure 2 As shown, the heat sink 3 is an aluminum plate, and multiple heat dissipation strips 31 are formed on the surface of the aluminum plate by opening grooves, which can better dissipate heat from the LED light board 2 below the heat sink 3.

[0020] For a specific embodiment, please refer to Figure 1 As shown, the circular top cover 5 is rotatably connected to a plurality of handles 54, thereby allowing the circular top cover 5 to be easily attached to or detached from the annular base 1 by holding the handles 54.

[0021] For a specific embodiment, please refer to Figure 1 As shown, the intake fan is fixedly connected to the top of the circular top cover 5 corresponding to the air inlet 51 by screws 7, ensuring the reliability of the connection between the intake fan and the top of the circular top cover 5.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A natural light multi-band spectrum simulated light source device, characterized in that, The device includes an annular base. An LED light panel is fixedly connected to the lower part of the hollow inner wall of the annular base. The LED light panel is equipped with multiple LED light groups, each of which includes eight LEDs with different spectra that illuminate vertically. A heat sink is fixedly connected to the upper part of the hollow inner wall of the annular base. The heat sink has multiple wire connectors in its middle. The wires on each wire connector are connected to a predetermined number of LED light groups on the LED light panel. A circular top cover is fastened to one side of the annular base of the heat sink. A PPFD sensor is fixedly installed in the middle of the circular top cover. Multiple air inlets are opened on the circular top cover surrounding the PPFD sensor. An air intake fan is fixed inside the top of the circular top cover corresponding to each air inlet. Air outlets are opened on the surrounding side walls of the circular top cover. Multiple power sockets are also provided on the side walls of the circular top cover. The inner end of the power socket is connected to the wires on the wire connector and the air intake fan through wires. The outer end of the power socket is connected to the output terminal of an existing controllable power supply through wires. The input terminal of the controllable power supply and the PPFD sensor are both connected to a host computer.

2. The natural light illuminant multi-band spectral simulation light source device according to claim 1, characterized in that, The bottom of the annular base is provided with multiple positioning posts.

3. The natural light illuminant multi-band spectral simulation light source device according to claim 1, characterized in that, The heat sink is an aluminum plate, and multiple heat dissipation strips are formed on the surface of the aluminum plate by opening grooves.

4. The natural light multi-band spectrum simulation light source device according to claim 1, characterized in that, The circular top cover has multiple handles that can be rotatably connected to its surface.

5. The natural light multi-band spectrum simulation light source device according to claim 1, characterized in that, The intake fan is fixedly connected to the top of the circular top cover corresponding to the air intake hole by screws.

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