Marine lighting device and light linkage control method thereof

Abstract

The present application relates to C12M enzymology or microbiology device technical field, specifically to microalgae reactor matching lighting device, specifically disclose a marine lighting equipment and its light linkage control method, the lamp includes: a plurality of consistent splicing units, mutually engage into the hollow polygonal lampshade shell; Each splicing unit inside is equipped with PCB lamp board; The lampshade shell is equipped with the switching circuit board that is electrically connected with all PCB lamp boards; The environmental parameter detector that detects environmental illumination intensity and algal liquid concentration respectively; The control module is electrically connected with environmental parameter detector and switching circuit board respectively, and it adjusts the output power of each light source on PCB lamp board according to the joint determination result of environmental illumination intensity and algal liquid concentration. The lamp is uniformly distributed by modular splicing, and can be flexibly adapted to different diameter reactors, and is convenient to disassemble, maintain; Based on the double parameter joint determination, intelligent dimming is realized, light inhibition or light deficiency is avoided, and microalgae photosynthetic efficiency and stability are improved.

Description

Technical Field

[0001] This invention relates to the field of enzymology or microbiology devices under the C12M classification, specifically to lighting devices for microalgae reactors, and particularly to a marine lighting device and its lighting linkage control method. Background Technology

[0002] Floating cylindrical microalgae culture reactors are core biological culture equipment supporting large-scale microalgae cultivation and aquatic biological resource cultivation. Belonging to the field of biological culture device technology, they align with the industrial development strategy of deep-sea biological cultivation, the construction of blue ocean resources, and the efficient utilization of marine biological resources. Microalgae, as aquatic biological resource with both marine ecological restoration and marine economic value, are key basic organisms for aquaculture and aquatic ecological regulation. Their growth and reproduction are highly dependent on precisely controllable light conditions during cultivation. Sufficient and adjustable light intensity, uniform light distribution around the reactor, and a spectral ratio adapted to the photosynthetic needs of the algae strains are core technical conditions for improving microalgae biomass yield and the accumulation efficiency of target products such as lipids and proteins within the microalgae culture reactor. This directly relates to the realization of core industrial goals such as increasing the production capacity of large-scale microalgae cultivation, constructing aquatic ecological balance, and efficiently utilizing biological resources.

[0003] In large-scale microalgae cultivation systems, cylindrical microalgae cultivation reactors have become the mainstream cultivation equipment for large-scale, intensive microalgae cultivation scenarios due to their advantages of strong structural stability, high effective volume utilization, and excellent internal hydrodynamic performance. In actual cultivation conditions, the special curved surface structure of the cylindrical reactor, combined with the outdoor open-air cultivation environment with high salt spray and strong environmental disturbance, places stringent technical requirements on the corrosion resistance, circumferential uniform light distribution, and compatibility with various reactor sizes of the accompanying biological cultivation-specific lighting device.

[0004] Existing lighting equipment and cultivation devices for cylindrical microalgae culture reactors have many shortcomings and cannot meet the high-precision, refined, and intelligent cultivation requirements of C12M-type biological culture equipment. Specific problems are as follows: (1) Existing lighting fixtures for microalgae cultivation mostly use single fixed spectrum or conventional full spectrum white light sources, which cannot accurately match red light, blue light, green light and other special effective wavelengths for different growth stages of microalgae in the microalgae reactor. The photosynthetic utilization rate is low, the microalgae growth cycle is long and the production capacity is low. (2) Existing lighting fixtures for microalgae cultivation generally cannot achieve multi-spectral independent voltage and light regulation. The spectral ratio and light intensity cannot be dynamically adjusted. They do not have the function of adaptively adjusting the lighting parameters according to the real-time changes in the algal solution concentration in the reactor. At the same time, they cannot sense the difference in day and night brightness of the cultivation environment to make intelligent supplementary light adjustment. It is difficult to flexibly optimize the lighting scheme by combining the algal solution concentration, the external light environment and the growth needs of different algal species. The overall lighting adaptability is poor and the level of intelligence is low, which cannot meet the needs of high-precision, full-cycle fine cultivation of microalgae in cylindrical microalgae reactors.

[0005] (3) Existing external lighting fixtures adapted to cylindrical microalgae reactors mainly adopt strip, cylindrical, and flat structures, which can only meet basic lighting needs and have significant technical defects in terms of specific adaptability to cylindrical bioreactors: First, strip lighting equipment is mostly deployed on one side or locally, making it difficult to achieve uniform 360° circumferential lighting in the cylindrical reactor. This easily causes uneven growth, local light inhibition, and insufficient local light for microalgae inside the reactor due to differences in light gradient, resulting in poor overall cultivation uniformity; Second, although cylindrical surround lighting equipment... While it can achieve surround illumination, its fixed overall structure makes it unsuitable for cylindrical microalgae cultivation reactors of different diameters, resulting in poor equipment versatility. Furthermore, it is difficult to disassemble, inspect, and maintain in high-salt-spray cultivation environments, hindering its large-scale application. Thirdly, the planar structure of the flat-panel lighting equipment results in poor fit with the curved outer wall of the cylindrical reactor, causing significant light reflection loss on the reactor surface. It also presents obvious blind spots, failing to balance the uniformity of light illumination and the efficiency of light energy utilization in microalgae cultivation, thus drastically reducing the economic benefits of large-scale microalgae cultivation. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a marine lighting device and its lighting linkage control method, which aims to solve the technical problems of uneven lighting, inconvenient disassembly and maintenance, single spectrum and inability to jointly control the lighting of microalgae cultivation equipment carried on ships at sea in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A marine lighting device, comprising: Multiple structurally identical splicing units are used to interlock and enclose a hollow polygonal lampshade housing; A PCB light board is located inside each splicing unit, and the PCB light board integrates independently controllable multi-channel light sources; The adapter circuit board located inside the lamp housing is electrically connected to all the PCB lamp boards and is used to provide multi-spectral power supply and signal conversion. An environmental parameter detector used to detect ambient light intensity and algal solution concentration respectively; The control module is electrically connected to the environmental parameter detector and the adapter circuit board, respectively, and is used to adjust the output power of each light source on the PCB board according to the joint determination result of the ambient light intensity and the algal solution concentration.

[0008] In the aforementioned marine lighting equipment, the splicing unit is a heat sink, and multiple heat sinks are assembled to form a hollow octagonal prism structure lampshade housing.

[0009] In the aforementioned marine lighting equipment, each heat sink has a protruding ridge at one end in the width direction and a slot matching the shape of the protruding ridge at the other end. Two adjacent heat sinks can be detachably connected by sliding cooperation between the protruding ridge and the slot.

[0010] In the aforementioned marine lighting equipment, each of the heat sinks has an inner sidewall with a mounting groove for mounting and locking the PCB lamp board and a screw hole for the locking screw to pass through.

[0011] The marine lighting equipment further includes an annular cover plate and an annular base plate. The annular cover plate covers the top of the lamp housing and is fixedly connected to the heat sink. The annular base plate covers the bottom of the lamp housing and is fixedly connected to the heat sink. The adapter circuit board is sandwiched between the bottom of the lamp housing and the annular base plate.

[0012] The marine lighting equipment mentioned above includes five independently controllable light sources integrated on the PCB light board, namely a first red light source, a second red light source, a blue light source, a green light source, and a white light source. The wavelength of the first red light source is 625nm, the wavelength of the second red light source is 660nm, the wavelength of the blue light source is 450nm, the wavelength of the green light source is 525nm, and the color temperature of the white light source is 5000K with a color rendering index Ra≥95.

[0013] A method for controlling the lighting linkage of marine lighting equipment as described above, comprising the following steps: Real-time acquisition of ambient photosynthetically active radiation (PAR) values ​​and algal solution OD concentration values; The effective radiation PAR value and the algal liquid OD concentration value are each compared with preset multiple ranges, and when both fall into the corresponding judgment range at the same time, the spectral power matching corresponding to the judgment range is triggered. Based on the triggered spectral power ratio, a control signal is generated to adjust the PWM output duty cycle of each independent controllable light source on the PCB light board.

[0014] The aforementioned lighting linkage control method further includes a strong light forced protection step: when the PAR value is greater than or equal to 180 μmol / (m 2 When ·s), the power supply to some spectral light sources is selectively cut off, and the power output limit of the remaining spectral light sources is locked.

[0015] The aforementioned lighting linkage control method further includes a step of enhanced supplemental lighting for extremely rare algae: when the OD concentration of the algal solution is less than 0.2 and the PAR value is less than or equal to 40 μmol / (m²), the light intensity is increased. 2 When ·s), the PWM output duty cycle of each independent controllable light source is simultaneously increased based on the basic power ratio of the corresponding interval.

[0016] The aforementioned lighting linkage control method further includes a power limiting alarm step for excessively concentrated algae solution: when the OD concentration of the algae solution is greater than 3.0, the current PWM output duty cycle of each independent controllable light source is halved, and an audible and visual alarm signal is triggered.

[0017] Beneficial effects: This invention provides a marine lighting device and its lighting linkage control method. By interlocking multiple structurally identical splicing units to form a hollow polygonal lampshade housing, modular and detachable splicing of the lampshade housing is achieved. The lamp size can be flexibly adjusted according to reactor specifications, and a single splicing unit can be directly replaced when damaged, without overall disassembly, making maintenance convenient. The inner side of the splicing unit is equipped with a lamp board integrating multiple independently controllable light sources. With the help of an adapter circuit board, multiple spectra can be independently powered and controlled, allowing the spectral ratio of the light sources to be dynamically adjusted as needed. Environmental parameter detectors detect ambient light intensity and algal concentration respectively. The control module adjusts the output power of each light source based on the combined judgment result of these two factors, avoiding the limitations of single-parameter dimming: when the external natural light is strong, the output of artificial light sources can be reduced to prevent light suppression; when the algal concentration is low, supplemental lighting can be strengthened to promote proliferation; when the algal concentration is too high, the strong light band can be reduced and penetrating light sources can be increased to ensure photosynthesis at the bottom layer. Simultaneously, auxiliary control logic such as forced strong light protection, enhanced supplemental lighting for extremely sparse algae, and power-limiting alarm for excessively concentrated algal solutions further enhances the system's safety and adaptability. Therefore, this invention achieves circumferential uniform light distribution, modular assembly and disassembly, independent adjustment of multiple spectra, and intelligent linkage control based on ambient light and algal solution concentration, which effectively improves the photosynthetic efficiency and stability of microalgae cultivation and reduces energy consumption and operation and maintenance costs. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of the marine lighting device provided by the present invention; Figure 2 An exploded view of the marine lighting device provided by the present invention; Figure 3 This is an exploded structural diagram of the splicing unit and PCB light board provided by the present invention.

[0019] Figure label: 1—Splicing unit; 2—PCB light board; 3—Adapter circuit board 4—Annular cover plate; 5—Annular base plate; 6—Light sensor 7—Algal solution concentration detector; 8—Control box; 11—Protruding ridge 12—Card slot; 13—Mounting slot; 21—Pin 31—Terminal block. Detailed Implementation

[0020] This invention provides a marine lighting device and its lighting linkage control method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0021] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0022] Figures 1 to 3 A schematic diagram of a marine lighting device according to an embodiment of this application is shown. Figures 1 to 3 As shown, this embodiment of the invention provides a marine lighting device, which includes: multiple identical splicing units 1, used to interlock and form a hollow polygonal lampshade housing; a PCB lamp board 2 disposed inside each splicing unit 1, the PCB lamp board 2 integrating independently controllable multi-channel light sources; a transition circuit board 3 disposed inside the lampshade housing, which is electrically connected to all PCB lamp boards 2, used to provide multi-channel spectral power supply and signal conversion; an environmental parameter detector used to detect ambient light intensity and algal concentration respectively; and a control module, which is electrically connected to the environmental parameter detector and the transition circuit board 3 respectively, used to adjust the output power of each light source on the PCB lamp board 2 according to the joint determination result of the ambient light intensity and the algal concentration.

[0023] This invention utilizes multiple structurally identical splicing units 1 to form a hollow polygonal shell, constituting a modular shell framework. The hollow structure of this shell provides space for the light panels, and its polygonal outline can fit snugly around the cylindrical reactor to achieve a uniform circumferential illumination distribution. It also blocks stray light from entering from the sides, improving light utilization. The PCB light board 2 inside each splicing unit 1 serves as an independent light source unit, with multiple light sources on it that can be independently controlled. When environmental parameter detectors collect real-time data on external light intensity (e.g., PAR value) and algal concentration in the reactor (e.g., OD value), the data is aggregated via a transfer circuit board 3 and transmitted to the control module. The core logic of the control module involves joint judgment; that is, only when both parameters (light intensity and algal concentration) simultaneously fall within a preset corresponding range will the output power of all or part of the light sources on the light board be adjusted (e.g., via PWM signals). This mechanism avoids light inhibition caused by blindly supplementing light when there is sufficient natural light, and also prevents the indiscriminate increase of all light source power simply because the algal solution concentration is low or in the absence of light. Thus, it precisely matches the complex light requirements of microalgae under different external environments and growth densities, achieving energy savings while optimizing photosynthetic efficiency.

[0024] In some embodiments, the splicing unit 1 mentioned above is a heat sink, and multiple heat sinks are joined together to form a hollow octagonal prism lampshade housing. In this embodiment, the eight sides of the octagonal prism structure are evenly distributed around the reactor circumference to form a regular octagonal hollow prism structure, and the PCB lamp board 2 on each side emits light towards the center of the reactor, achieving 360° all-round uniform illumination. On the other hand, this structure is more convenient in terms of processing, assembly, and standardization compared to a circular or more deformed structure. As the main body of the splicing unit 1, the heat sink itself has heat dissipation properties and can directly absorb and conduct the heat generated by the light source on the inner PCB lamp board 2 when it is working. This integrated design of structure and function avoids the structural complexity and weight increase caused by adding an additional heat sink. Furthermore, based on the above principles, the hollow octagonal prism structure can provide a stable and open space for the internal electronic components and allow the light source to radiate outward uniformly through the open areas between the planes without obstruction, effectively solving the physical problem of uneven circumferential lighting in cylindrical containers.

[0025] In some embodiments, the aforementioned heat sink is an aluminum profile heat sink with axially extending heat dissipation fins on its outer side to increase the heat dissipation area. As a specific implementation, the aluminum profile can be integrally formed through an extrusion process, resulting in high forming precision, excellent thermal conductivity, light weight, and corrosion resistance. Especially in marine environments, the surface of the aluminum profile can be further enhanced to improve its salt spray corrosion resistance through treatments such as anodizing. Preferably, multiple axially extending heat dissipation fins can be provided on the outer surface of the aluminum profile heat sink to increase the heat dissipation area and improve convective heat dissipation efficiency.

[0026] In some embodiments, for the aforementioned plurality of heat sinks, each heat sink has a protruding rib 11 at one end in the width direction and a slot 12 at the other end that matches the shape of the protruding rib 11. Adjacent heat sinks are detachably engaged through the sliding engagement of the protruding rib 11 and the slot 12. Specifically, the cross-sectional shape of the protruding rib 11 can be trapezoidal, rectangular, or dovetail-shaped, while the cross-sectional shape of the slot 12 has an inner cavity profile that precisely complements it. For example, the slot 12 can be a T-shaped groove adapted to the T-shaped protruding rib 11, or a dovetail groove adapted to the dovetail-shaped protruding rib 11. The T-shaped or dovetail-shaped cross-sectional shape ensures that the protruding rib 11 and the slot 12 are locked together in the radial direction, and can only slide relative to each other in the axial direction, thereby achieving reliable engagement and locking.

[0027] During assembly, the protruding ridge 11 of one heat sink is aligned along its length (i.e., vertical direction) and slid into the slot 12 of the adjacent heat sink. The two rely on shape interlocking to achieve radial positioning and limiting, preventing separation. This sliding fit connection method eliminates the need for complex angle calibration using additional tools during assembly; multiple units can be joined simply by a linear push-in action, greatly simplifying the operation. Furthermore, if a heat sink unit (along with its lamp panel) malfunctions, it can be easily removed and replaced by sliding it in the reverse direction along the slot 12 without disassembling the entire lamp housing, significantly improving maintenance convenience. Moreover, based on the above principle, the sliding engagement structure of the protruding ridge 11 and the slot 12 forms a stable mechanical connection between adjacent heat sinks, ensuring the rigidity of the overall structure after the eight panels are assembled and effectively resisting minor deformations caused by environmental vibrations or the lamp's own weight, maintaining the stability of the polygonal outline.

[0028] The structural advantages of the heat sink in this embodiment are as follows: the eight heat sinks have completely identical structures, requiring only one mold for mass production, resulting in low manufacturing costs and high production efficiency; the sliding fit of the slot 12 allows for precise positioning, ensuring the geometric accuracy and structural stability of the octagonal prism shell, and the T-shaped or dovetail-shaped mating surfaces provide good guiding accuracy; it can be disassembled independently on one side: when the light source on one side of the lamp malfunctions, only the corresponding heat sink in the faulty area needs to be slid out of the slot 12 along the axial direction and replaced, without disassembling the entire lamp cover, making maintenance convenient and efficient, effectively reducing repair costs and difficulty; and it offers flexible specification adaptation: since the eight heat sinks are slidably spliced ​​to form a closed shell, the width of the heat sinks can be adjusted to adapt to cylindrical reactors of different diameters without redesigning the mold, providing excellent specification adaptability.

[0029] In some embodiments, for each of the aforementioned heat sinks, the inner sidewall of each heat sink is provided with a mounting groove 13 for mounting and locking the PCB light board 2, and a screw hole for the locking screw to pass through. The mounting groove 13 extends along the length of the heat sink, and its inner cavity contour precisely matches the outer edge of the PCB light board 2 (such as the thickness and side shape of the PCB light board 2). During assembly, the PCB light board 2 is first slid into the mounting groove 13 to initially fix it in the preset position, avoiding the risk of thermal stress or aging caused by welding or gluing. Thermal grease is applied between the PCB light board 2 and the heat sink to effectively reduce contact thermal resistance. The heat generated when the LED beads are working is conducted sequentially through the PCB light board 2, thermal grease, and heat sink to the surface of the heat sink, and then dissipated into the environment through natural convection. The screw hole is located at the bottom of the mounting groove 13, and the locking screw passes through the corresponding through hole on the PCB light board 2 and is screwed into the screw hole. The locking force generated by tightening the screw tightly presses the back of the PCB light board 2 against the bottom wall of the mounting groove 13. This snap-fit ​​and locking combination fixing method, on the one hand, prevents the lamp board from sliding or rotating in the plane by the lateral limiting of the mounting slot 13, and on the other hand, ensures a tight physical contact between the lamp board and the heat sink by the axial pressure of the screw, maximizing the heat conduction interface area, thereby efficiently transferring the heat generated by the light source chip to the heat sink for dissipation, solving the heat dissipation problem under high-power multi-channel light source integration.

[0030] In some embodiments, the marine lighting device for the aforementioned lamp further includes an annular cover plate 4 and an annular base plate 5. The annular cover plate 4 covers the top of the lamp housing and is fixedly connected to the heat sink, while the annular base plate 5 covers the bottom of the lamp housing and is fixedly connected to the heat sink. The adapter circuit board 3 is sandwiched between the bottom of the lamp housing and the annular base plate 5. The annular cover plate 4 and the annular base plate 5 respectively cover the top and bottom openings of the lamp housing, which is formed by multiple heat sinks. The main function of the annular cover plate 4 is to seal the top, preventing dust and foreign objects from falling in, and to help improve the overall structural integrity and rigidity. The annular base plate 5 serves as the mechanical base of the lamp, providing a stable mounting interface for the entire lamp, and further integrating the eight independent heat sinks into a solid whole at the bottom through its fixed connection with the bottom of the heat sink. The adapter circuit board 3 is designed to be annular, with an inner diameter greater than or equal to the inner diameter of the lamp housing, allowing it to cover the bottom of all heat sinks and connect to the electrical connection terminals of each PCB lamp board 2. By being sandwiched between the bottom of the lampshade housing and the annular base plate 5, the adapter circuit board 3 receives mechanical protection while also receiving auxiliary heat dissipation with the help of the annular base plate 5. A terminal block 31 is located on the side of the adapter circuit board 3 facing the PCB lamp board 2, corresponding to the pin 21 at the bottom of the PCB lamp board 2. A stable electrical connection between the PCB lamp board 2 and the adapter circuit board 3 is achieved through the insertion of the pins and the terminal block. This fixing component design cleverly integrates three major functions: structural enclosure, electrical connection, and mechanical reinforcement, making the entire lamp a compact, reliable, and easily manageable top and bottom cables encapsulated unit.

[0031] In some embodiments, the aforementioned PCB light board 2 integrates five independently controllable light sources, including a first red light source, a second red light source, a blue light source, a green light source, and a white light source. The first red light source has a wavelength of 625nm, the second red light source has a wavelength of 660nm, the blue light source has a wavelength of 450nm, the green light source has a wavelength of 525nm, and the white light source has a color temperature of 5000K and a color rendering index Ra≥95. These five LED beads are arranged in an array on the PCB light board 2, each corresponding to an independent driving circuit channel, which can be dimmed by the control module sending a PWM signal individually. The 625nm and 660nm red light are used to assist in the accumulation of organic matter and drive core photosynthesis, respectively; the 450nm blue light is used to stimulate cell division; the 525nm green light, due to its strongest penetrating ability in algal solution, is specifically used to supplement bottom illumination during high-density periods; and the 5000K high-CRI white light provides full-spectrum background light and also facilitates observation of the culture medium. With independent control of multiple spectra, the controller can precisely adjust the intensity ratio of five spectral components based on the joint judgment results, thereby providing highly customized composite spectra for microalgae in the seedling, growth and maturity stages, as well as in different external environments such as weak light, medium light and strong light. This is the core physical basis for achieving precise light control, avoiding light waste and light inhibition.

[0032] A lighting linkage control method for marine lighting equipment as described above includes the following steps: real-time acquisition of ambient photosynthetically active radiation (PAR) values ​​and algal slurry OD concentration values; comparison of the PAR values ​​and algal slurry OD concentration values ​​with preset multiple ranges, and triggering the spectral power ratio corresponding to the judgment range when both fall into the corresponding judgment range; generating a control signal based on the triggered spectral power ratio to adjust the PWM output duty cycle of each independent controllable light source on the PCB light board 2.

[0033] The control logic of the method is rooted in the hardware structure of the lamp of the present invention. The PAR and OD data continuously collected by environmental parameter detectors (such as the light control sensor 6 and the algae liquid concentration detector 7) are transmitted to the adapter circuit board 3 through electrical connection, and finally delivered to the control module. The multi-gear intervals preset in the control module form a two-parameter look-up matrix. For example, PAR is divided into weak, medium, and strong light intervals, and OD is divided into low, medium, and high concentration intervals, and the combination of the two forms a plurality of working condition cells. Only when the real-time PAR and OD data fall into a certain cell at the same time, the spectral power ratio preset in the cell (that is, the target power percentage of each light source) is called; then, the control module generates a control signal containing the target duty cycle of each channel, distributes it to each PCB light board 2 through the adapter circuit board 3, and drives each LED bead to reach the set brightness. This logic and determination mechanism ensure the prudence and accuracy of the regulation action, that is, adjustment is only carried out under the compound condition that the external light is insufficient and the internal algae population really has demand (or conversely, the external light is too strong and needs protection), eliminates invalid or harmful light output from the perspective of control logic, and realizes the dynamic optimal matching of light supply and microalgae growth demand.

[0034] In some specific embodiments, the control unit is configured to: when the light intensity data is in the low light interval, drive each of the light sources with a first power ratio according to the concentration gear where the concentration data is located; when the light intensity data is in the medium light interval, drive each of the light sources with a second power ratio lower than the first power ratio; when the light intensity data is in the high light interval and the concentration data is lower than a preset threshold, turn off all the light sources; when the light intensity data is in the high light interval and the concentration data is higher than the preset threshold, only the green light source is driven with a third power ratio. This solution can not only dynamically adjust the spectral ratio and light intensity according to the algae liquid concentration, but also automatically switch the supplementary light strategy according to the difference of day and night environment brightness, truly realizing all-weather, full-cycle intelligent light management. In particular, the green light priority supplementary light strategy is originally created for high-concentration algae liquid, which makes full use of the strong penetration of green light in algae liquid, and effectively solves the contradiction of "surface light inhibition and insufficient light at the bottom layer" in high-density culture.

[0035] By way of example, the low light interval is photosynthetically active radiation PAR≤40μmol / (m²·s), the medium light interval is 40μmol / (m²·s)<PAR<120μmol / (m²·s), and the high light interval is PAR≥120μmol / (m²·s); the concentration data is represented by OD value, the low concentration gear is OD<0.8, the medium concentration gear is 0.8≤OD≤2.2, and the high concentration gear is OD>2.2; When the light intensity is low and the concentration data is at the low concentration level, the output power of the first red light source is 60%, the output power of the second red light source is 100%, the output power of the blue light source is 90%, the output power of the green light source is 30%, and the output power of the white light source is 70%. At this time, 660nm red light is used as the main force for photosynthesis and is output at full power, blue light is used to promote cell division, a small amount of green light is used to assist light transmission, and white light is used to balance the spectrum, so as to achieve rapid amplification of algal species at full power. When the light intensity is low and the concentration data is at the medium concentration level, the output power of the first red light source is 70%, the output power of the second red light source is 100%, the output power of the blue light source is 60%, the output power of the green light source is 50%, and the output power of the white light source is 50%. At this time, the dual red light maintains efficient photosynthesis, the proportion of blue light is reduced to avoid overstimulating cell division, and the output of green light is increased to compensate for the light exposure of algal cells in the middle layer of the tank. When the light intensity is low and the concentration data is at the high concentration level, the output power of the first red light source is 40%, the output power of the second red light source is 50%, the output power of the blue light source is 30%, the output power of the green light source is 90%, and the output power of the white light source is 20%. At this time, the red and blue main light is significantly reduced to prevent the surface algae from being burned by strong light; the green light is fully utilized to supplement the high density algae at the bottom of the tank with its high penetration, and the white light is reduced to save energy consumption.

[0036] When the light intensity is in the medium range and the concentration data is at the low concentration level, the output power of the first red light source is 40%, the output power of the second red light source is 70%, the output power of the blue light source is 60%, the output power of the green light source is 20%, and the output power of the white light source is 40%. When the light intensity is in the medium light range and the concentration data is at the medium concentration level, the output power of the first red light source is 50%, the output power of the second red light source is 70%, the output power of the blue light source is 40%, the output power of the green light source is 40%, and the output power of the white light source is 30%. When the light intensity is in the medium light range and the concentration data is at the high concentration level, the output power of the first red light source is 20%, the output power of the second red light source is 30%, the output power of the blue light source is 20%, the output power of the green light source is 70%, and the output power of the white light source is 10%. In this embodiment, when the environment is in the medium light range, natural light provides basic illumination, and artificial light sources only supplement the illumination difference.

[0037] When the concentration data is in the high-light range and at the low or medium concentration level, the control module cuts off all five light sources. In this high-light range, natural light is sufficient, allowing for cultivation solely by natural light. When the concentration data is in the high-light range and at the high concentration level, the control unit drives the green light source at only 50% output power, cutting off the other four light sources. While the surface of the tank receives sufficient natural light, the high-density algae solution blocks light, resulting in insufficient illumination for the lower cells. At this time, only the green light source with the strongest penetration is activated at 50% power for micro-supplementary lighting, while the other four light sources are cut off to avoid photoinhibition.

[0038] In some embodiments, the above-mentioned lighting linkage control method further includes a strong light forced protection step: when the PAR value is greater than or equal to 180 μmol / (m 2 When the light sensor detects extremely strong light, the control system selectively cuts off the power supply to some spectral light sources and locks the upper limit of the power output of the remaining spectral light sources. This step has a higher priority than the conventional joint decision logic. When the light sensor detects extremely strong light, the control system executes this protection procedure first. It bypasses the current algal liquid OD value and directly issues an instruction to the adapter circuit board 3 or PCB lamp board 2: cut off the power supply to spectral channels such as red light (625nm, 660nm), blue light (450nm), and white light (5000K high CRI white light), which are prone to superimposed with strong natural light and aggravate the light suppression effect. At the same time, for the green light (525nm) channel, which has strong penetration and less impact on the upper algal liquid, the maximum value of its PWM output duty cycle is locked at a low level (such as 50%), so that even if the conventional logic requires a higher output, its actual output will not exceed this upper limit. This step physically reduces the light intensity emitted by the lamps in strong environments by actively shutting down or limiting the output of specific spectra, especially reducing the overlap with the red and blue spectra abundant in strong natural light, effectively preventing photo-oxidative damage to microalgal cells caused by superposition of light intensity.

[0039] In some embodiments, the above-mentioned lighting linkage control method further includes a step of enhanced supplemental lighting for extremely rare algae: when the OD concentration of the algal solution is less than 0.2 and the PAR value is less than or equal to 40 μmol / (m²), the method is further defined as follows: 2When ·s), the PWM output duty cycle of each independent controllable light source is simultaneously increased based on the corresponding base power ratio. This step, based on the conventional joint judgment (i.e., the low-light condition with PAR≤40 and the low-concentration condition with OD<0.8 already determined), further identifies the extremely sparse state with OD<0.2. Once this composite condition is met, the system will simultaneously increase the target duty cycle of all five light sources by a fixed percentage (e.g., 20%) based on the base spectral power ratio preset for this condition (e.g., the base duty cycle corresponding to the low-concentration, low-light condition during the seedling stage). The control signal synchronously adjusts the drive current of each LED bead through the adapter circuit board 3, thereby achieving an overall increase in light intensity. This is equivalent to providing enhanced, full-spectrum artificial lighting through lamps during the critical initial stage of algal inoculation when external natural light is severely insufficient, in order to accelerate the photosynthesis and cell division of the initial algal population, shorten the proliferation start-up time, and lay the foundation for subsequent efficient cultivation.

[0040] In some implementations, the above-mentioned lighting linkage control method further includes a power-limiting alarm step for excessively concentrated algal solution: when the algal solution OD concentration is greater than 3.0, the current PWM output duty cycle of each independent controllable light source is halved, and an audible and visual alarm signal is triggered. When the algal solution concentration detector reports an OD value exceeding the ultra-high threshold of 3.0, the control system will immediately intervene regardless of the current ambient light intensity (PAR value). It will acquire the PWM duty cycle value of each light source currently in operation and halve the value of all channels synchronously (e.g., from 70% to 35%), and then update the output to each PCB lamp board 2 through the adapter circuit board 3. This operation physically reduces the total light intensity irradiating the surface of the algal solution, preventing the surface cells of high-density algae from being burned or light-suppressed due to excessive light absorption and insufficient heat dissipation. At the same time, the control module will drive its integrated or external buzzer and indicator light to generate audible and visual alarm signals, intuitively reminding the operator that the algae solution concentration has exceeded the standard and needs to be diluted in time. Thus, from both automatic control and manual intervention, the system can be prevented from collapsing due to excessive algae solution concentration.

[0041] It should be noted that, in some optional embodiments, to avoid corrosion of electrical components by the high-salt-fog marine environment, the housings of the control box 8 (corresponding to the integrated housing of the control module and power supply, etc.), the environmental parameter detectors (corresponding to the algal concentration detector 7, light sensor 6, etc.), and external cable connectors can all adopt an IP67 or higher level waterproof sealing structure, and a nano-protective coating can be sprayed on the surface of electronic components. The specific dimensions of the heat sink (such as length, width, and thickness) can be customized according to the diameter of the target reactor and the required lighting height. For example, the length range can be between 300mm and 1500mm to accommodate reactors of different capacities. The annular cover plate 4, the annular adapter circuit board 3, and the annular base plate 5 can be made of aluminum alloy or stainless steel, with an outer contour of regular octagon and an inner contour of circle, and the edges are rounded or chamfered to ensure safety. The LED beads on the PCB light board 2 can be made using SMD surface mount technology, and after soldering, a layer of transparent hydrophobic nano-coating is coated on the surface of the beads to further improve their moisture resistance and corrosion resistance. The overall assembly sequence of the lamps can be as follows: First, insert and fix the PCB lamp board 2 onto a single heat sink; then, slide all the heat sinks sequentially through the protrusions 11 and slots 12 to form an octagonal prism shell; next, assemble the adapter circuit board 3 and the annular base plate 5 from the bottom, and screw them through the pre-set through holes in the annular base plate 5 and the adapter circuit board 3 to the screw holes on the bottom of the heat sink; then connect all the lamp boards to the electrical connectors of the adapter circuit board 3; finally, install the top annular cover plate 4. Anti-loosening washers or thread-locking agents can be added to the screw connections to adapt to the vibration of the marine environment.

[0042] In summary, this invention uses eight independent aluminum profile heat sinks connected by snap-fit ​​sliding splicing to form an octagonal prism lampshade. Each heat sink has a T-shaped or dovetail-shaped protrusion 11 on one side and a corresponding slot 12 on the other side. Adjacent heat sinks are positioned and locked by axial sliding cooperation. The eight heat sinks have completely identical structures, requiring only a single mold for mass production, resulting in low manufacturing costs. When a light source on one side fails, only the heat sink in the corresponding faulty area needs to be slid out of the slot 12 along the axial direction and replaced, without disassembling the entire lampshade. Compared to the maintenance method of existing integrated lamps that require complete disassembly and replacement, this invention significantly reduces maintenance difficulty and cost, and reduces equipment downtime. Furthermore, the eight sides of the octagonal prism lampshade of this invention are evenly distributed around the circumference of the cylindrical reactor, and the PCB lamp board 2 on each side emits light towards the center of the reactor. Compared to the single-sided or partial lighting of existing strip lights, the fixed structure of cylindrical lights, and the reflection loss and blind spots of flat panel lights, the octagonal prism structure achieves uniform 360° circumferential lighting without blind spots in the cylindrical reactor, significantly improving the uniformity of light inside the reactor and avoiding the problems of uneven microalgae growth and local light inhibition caused by differences in light gradient.

[0043] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A marine lighting device, characterized in that, include: Multiple structurally identical splicing units (1) are used to form a hollow polygonal lampshade housing by interlocking with each other; A PCB light board (2) is located inside each splicing unit (1), and the PCB light board (2) integrates an independently controllable multi-channel light source; The adapter circuit board (3) located inside the lampshade housing is electrically connected to all the PCB lamp boards (2) and is used to provide multi-spectral power supply and signal conversion; An environmental parameter detector used to detect ambient light intensity and algal solution concentration respectively; The control module is electrically connected to the environmental parameter detector and the adapter circuit board (3) respectively, and is used to adjust the output power of each light source on the PCB lamp board (2) according to the joint determination result of the ambient light intensity and the algal liquid concentration.

2. The marine lighting equipment according to claim 1, characterized in that, The splicing unit (1) is a heat dissipation plate, and multiple heat dissipation plates are spliced ​​together to form a lampshade housing with a hollow octagonal prism structure.

3. The marine lighting equipment according to claim 2, characterized in that, Each heat sink has a protruding ridge (11) at one end in the width direction and a slot (12) matching the shape of the protruding ridge (11) at the other end. Two adjacent heat sinks can be detachably snapped together by sliding cooperation between the protruding ridge (11) and the slot (12).

4. The marine lighting device according to claim 2, characterized in that, Each heat sink has an inner wall with a mounting groove (13) for mounting and locking the PCB lamp board (2) and a screw hole for the locking screw to pass through.

5. The marine lighting device according to claim 2, characterized in that, The marine lighting equipment also includes an annular cover plate (4) and an annular base plate (5). The annular cover plate (4) is placed on the top of the lampshade housing and fixedly connected to the heat sink. The annular base plate (5) is placed on the bottom of the lampshade housing and fixedly connected to the heat sink. The adapter circuit board (3) is sandwiched between the bottom of the lampshade housing and the annular base plate (5).

6. The marine lighting device according to claim 1, characterized in that, The PCB light board (2) integrates five independently controllable light sources, including a first red light source, a second red light source, a blue light source, a green light source and a white light source. The wavelength of the first red light source is 625nm, the wavelength of the second red light source is 660nm, the wavelength of the blue light source is 450nm, the wavelength of the green light source is 525nm, and the color temperature of the white light source is 5000K and the color rendering index Ra≥95.

7. A lighting linkage control method for a marine lighting device as described in any one of claims 1 to 6, characterized in that, Including the following steps: Real-time acquisition of ambient photosynthetically active radiation (PAR) values ​​and algal solution OD concentration values; The effective radiation PAR value and the algal liquid OD concentration value are each compared with preset multiple ranges, and when both fall into the corresponding judgment range at the same time, the spectral power matching corresponding to the judgment range is triggered. Based on the triggered spectral power ratio, a control signal is generated to adjust the PWM output duty cycle of each independent controllable light source on the PCB lamp board (2).

8. The lighting linkage control method according to claim 7, characterized in that, It also includes a forced protection step against strong light: when the PAR value is greater than or equal to 180 μmol / (m 2 When ·s), the power supply to some spectral light sources is selectively cut off, and the power output limit of the remaining spectral light sources is locked.

9. The lighting linkage control method according to claim 7, characterized in that, It also includes a step to enhance supplemental lighting for extremely rare algae: when the OD concentration of the algal solution is less than 0.2 and the PAR value is less than or equal to 40 μmol / (m²), the solution is prepared for illumination enhancement. 2 When ·s), the PWM output duty cycle of each independent controllable light source is simultaneously increased based on the basic power ratio of the corresponding interval.

10. The lighting linkage control method according to claim 7, characterized in that, It also includes a power limit alarm step for excessively concentrated algal solution: when the OD concentration of the algal solution is greater than 3.0, the current PWM output duty cycle of each independent controllable light source is halved and an audible and visual alarm signal is triggered.

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