A multi-channel LED light intensity compensation dynamic adjustment method
Patent Information
- Application Number
- CN202611075693.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-20
- Publication Date
- 2026-09-29
AI Technical Summary
多路LED灯具通常搭载不同波段、不同光效的LED灯珠，各路光源协同输出形成适配植物生长的专属光谱配比，但目前行业内尚无标准化的多路调光策略，主流调光方式存在明显弊端，主要分为三类：其一为单路独立增加功率调光，但若仅单独调整某一路LED的驱动功率以提升光强，会直接打破多路光源的光谱配比平衡，造成整体光谱偏移，无法满足作物精准补光需求；其二为各路固定功率增量调光，然而对每一路LED设置统一固定功率增幅，未适配各路LED的光效差异、功率阈值差异，易出现部分通路过驱、部分通路补偿不足的问题，同样引发光谱畸变；其三为粗放式等比例调光，但却未结合实时光强反馈、灯珠衰减特性动态校准，长期使用会因灯珠老化、温度漂移导致光谱配比偏差持续累积
[0007]本发明的有益效果是，其可适配2路及以上任意多路农业LED照明灯具，并可摒弃传统单路独立调光、各路固定增量调光的缺陷，通过动态等比例补偿，全程锁定基准光谱配比，实现光强可调、光谱绝对恒定，完全适配农业作物精准补光需求。
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Abstract
Description
Technical Field
[0001] This invention relates to the field of LED dimming control technology for agricultural lighting, specifically a method for dynamic adjustment of multi-channel LED light intensity compensation. Background Technology
[0002] With the rapid development of modern facility agriculture, professional agricultural intelligent lighting equipment is gradually iterating towards multi-channel, multi-spectral, and high-precision adjustable directions.
[0003] Single-channel LED lighting fixtures can linearly adjust the output light intensity by directly increasing or decreasing the drive power and adjusting the PWM duty cycle. The control logic is simple, the dimming accuracy is high, and there is no spectral shift problem. Multi-channel LED lighting fixtures typically utilize LEDs with different wavelengths and luminous efficacy. The coordinated output of each light source creates a specific spectral ratio tailored to plant growth. However, there is currently no standardized multi-channel dimming strategy in the industry, and mainstream dimming methods have significant drawbacks, mainly falling into three categories: First, independent power increase dimming for each channel. However, adjusting the drive power of only one LED to increase light intensity directly disrupts the spectral balance of multiple light sources, causing an overall spectral shift that fails to meet the precise supplemental lighting needs of crops. Second, fixed power increment dimming for each channel. However, setting a uniform fixed power increase for each LED fails to adapt to the differences in luminous efficacy and power thresholds among the LEDs, easily leading to overdriving in some channels and insufficient compensation in others, which also causes spectral distortion. Third, coarse proportional dimming, which does not incorporate real-time light intensity feedback and dynamic calibration based on LED attenuation characteristics. Long-term use will result in a continuous accumulation of spectral ratio deviations due to LED aging and temperature drift. The aforementioned traditional dimming methods cannot meet the core requirements of dynamically adjustable light intensity and constant spectrum, which seriously affects the accuracy of agricultural supplemental lighting, reduces crop photosynthetic efficiency, and easily leads to energy waste and shortened lifespan of LED lamps, thus restricting the widespread application of high-end intelligent agricultural lighting equipment. Summary of the Invention
[0004] To address the aforementioned issues, this invention provides a method for dynamic adjustment of multi-channel LED light intensity compensation. This method enables dynamic adaptive compensation of the light intensity of multiple LED light sources, precisely adjusting the overall output light intensity throughout the process while strictly locking the spectral ratio of each light source, thus achieving a dimming effect with variable light intensity and constant spectrum.
[0005] This invention adopts the following technical solution: a method for dynamic adjustment of multi-channel LED light intensity compensation, comprising the following steps: S1. Pre-calibrate the parameters of the multiple LED light sources of the LED lamp, determine the reference spectrum of each LED light source, and construct a constant spectral reference model; S2. Real-time acquisition of the overall output light intensity of LED lights, combined with the light intensity required by the plants, dynamically calculates the target compensation light intensity of each LED light source to obtain precise dimming parameters for each path. S3. Synchronously adjust the driving power of all LED light sources according to the dimming parameters to achieve proportional light intensity compensation of multiple LED light sources and maintain constant spectral ratio throughout the process. S4. Verify the light intensity and spectral parameters after dimming in real time, and repeat step S2 to iteratively calibrate the compensation amount to form a closed-loop dynamic adjustment.
[0006] Furthermore, in step S1, the LED lamp includes four LED light sources, namely blue light, white light, red light, and far-red light; Furthermore, in step S1, after determining the reference spectrum of each LED light source, the method further includes: obtaining the maximum spectral value max among the multiple LED light sources, comparing the maximum spectral value max with the preset minimum spectral value and the preset maximum spectral value simultaneously; if the maximum spectral value max is different from both the preset minimum spectral value and the preset maximum spectral value, then proceed to step S2; if the maximum spectral value max is equal to the preset minimum spectral value or the preset maximum spectral value, then end the light intensity adjustment. Further, step S2 includes the following steps: S2.1. Collect the overall output light intensity of the LED lamps in real time, compare the overall output light intensity of the LED lamps with the light intensity required by the plant. If it is higher than the light intensity required by the plant, proceed to step S2.2; if it is lower than the light intensity required by the plant, proceed to step S2.3. S2.2 Determine whether the minimum spectral value min in the multi-channel LED light source is greater than the minimum spectral threshold. If yes, proceed to step S2.4; otherwise, end the light intensity adjustment. S2.3 Determine whether the maximum spectral value max among the multiple LED light sources is less than the preset maximum spectral value. If yes, proceed to step S2.5; otherwise, end the light intensity adjustment. S2.4, According to the formula: To obtain the dimming parameters for each light source; in, Indicates the number of LED light sources. ; Indicates the first The spectral values of the road light source, and ; S2.5, According to the formula: To obtain the dimming parameters for each light source; Furthermore, in step S4, the light intensity and spectral parameters after dimming are verified in real time, and step S2.1 is repeated to iteratively calibrate the compensation amount until the light intensity adjustment ends, thereby forming a closed-loop dynamic adjustment.
[0007] The beneficial effects of this invention are that it can be adapted to any number of agricultural LED lighting fixtures with two or more channels, and it can overcome the shortcomings of traditional single-channel independent dimming and fixed incremental dimming of each channel. Through dynamic proportional compensation, the reference spectral ratio is locked throughout the process, so as to achieve adjustable light intensity and absolutely constant spectrum, which can fully meet the precise supplemental lighting needs of agricultural crops. Attached Figure Description
[0008] Figure 1 This is a flowchart of the present invention. Detailed Implementation
[0009] like Figure 1 As shown, the present invention provides a method for dynamic adjustment of multi-channel LED light intensity compensation, comprising the following steps: S1. Pre-calibrate the parameters of the multiple LED light sources of the LED lamp, determine the reference spectrum of each LED light source, and construct a constant spectral reference model; Furthermore, in step S1, after determining the reference spectrum of each LED light source, the method further includes: obtaining the maximum spectral value max among the multiple LED light sources, comparing the maximum spectral value max with the preset minimum spectral value and the preset maximum spectral value simultaneously; if the maximum spectral value max is different from both the preset minimum spectral value and the preset maximum spectral value, then proceed to step S2; if the maximum spectral value max is equal to the preset minimum spectral value or the preset maximum spectral value, then end the light intensity adjustment. Set the preset minimum value of the spectrum to 0% and the preset maximum value of the spectrum to 100%. Specifically, determine whether the maximum spectral value max is 0%. If not, proceed to step S2.1. If yes, end the light intensity adjustment. And at the same time, determine whether the maximum spectral value max is 100%. If not, proceed to step S2.1. If yes, end the light intensity adjustment. S2. Real-time acquisition of the overall output light intensity of LED lights, combined with the light intensity required by the plants, dynamically calculates the target compensation light intensity of each LED light source to obtain precise dimming parameters for each path. Further, step S2 includes the following steps: S2.1. Collect the overall output light intensity of the LED lamps in real time, compare the overall output light intensity of the LED lamps with the light intensity required by the plant. If it is higher than the light intensity required by the plant, proceed to step S2.2; if it is lower than the light intensity required by the plant, proceed to step S2.3. S2.2 Determine whether the minimum spectral value min in the multi-channel LED light source is greater than the minimum spectral threshold. If yes, proceed to step S2.4; otherwise, end the light intensity adjustment. S2.3 Determine whether the maximum spectral value max among the multiple LED light sources is less than the preset maximum spectral value. If yes, proceed to step S2.5; otherwise, end the light intensity adjustment. S2.4, According to the formula: To obtain the dimming parameters for each light source; in, Indicates the number of LED light sources. ; Indicates the first The spectral values of the road light source, and ; S2.5, According to the formula: To obtain the dimming parameters for each light source; S3. Synchronously adjust the driving power of all LED light sources according to the dimming parameters to achieve proportional light intensity compensation of multiple LED light sources and maintain a constant spectral ratio throughout the process. S4. Verify the light intensity and spectral parameters after dimming in real time, and repeat step S2.1 to iteratively calibrate the compensation amount until the light intensity adjustment ends, thereby forming a closed-loop dynamic adjustment.
[0010] The present invention will be explained and illustrated by the following embodiments: The LED lighting fixture is configured to include four LED light sources: blue light, white light, red light, and far-red light. Specifically, the first LED light source is blue light, the second LED light source is white light, the third LED light source is red light, and the fourth LED light source is far-red light. ;but This represents the spectral value of blue light. This represents the spectral value of white light; This represents the spectral value of red light; This represents the spectral value of far-red light. And set the spectral value of blue light. It is 30%; the spectral value of white light It is 40%; the spectral value of red light It is 20%; the spectral value of far-red light It is 50%; Based on the set spectral values, it can be seen that the far-red light has the largest spectral value of 50% among the four LED light sources, so it is taken as the maximum spectral value max; the red light has the smallest spectral value of 20%, so it is taken as the minimum spectral value min. Then, a judgment is made according to step S2, which is to compare the overall output light intensity of the LED lights with the light intensity required by the plants, and the judgment is divided into the following two cases: (1) If the light intensity is higher than that required by the plant, proceed to step S2.2; At this point, we find the smallest non-zero spectral value min (i.e., 20% of the red light spectral value). Since 20% of the red light spectral value is greater than the minimum spectral threshold (set to 1% in this embodiment), then according to the formula: To obtain the dimming parameters for each light source; Blue light is: 30% * (20-1) / 20 = 28.5%; The percentage of white light is: 40% * (20-1) / 20 = 38%; The red light percentage is: 20% * (20-1) / 20 = 19%; The far-red light is: 50% * (20-1) / 20 = 47.5%; This yields the dimming parameters for each light source, namely, the spectral value of blue light is 28.5%; the spectral value of white light is 38%; the spectral value of red light is 19%; and the spectral value of far-red light is 47.5%. Based on the corresponding spectral parameters, proportional light intensity compensation is achieved for multiple LED light sources, maintaining a constant spectral ratio throughout the process. If, after light intensity compensation, the overall output light intensity of the LED lights is still higher than the light intensity required by the plants, then repeat step S2.2. (2) If the light intensity is lower than that required by the plant, proceed to step S2.3; At this point, the maximum non-zero spectral value (max) is found (i.e., 50% of the far-red light spectral value). Since 50% of the far-red light spectral value is less than the preset maximum spectral value (set to 100% in this embodiment), then according to the formula: To obtain the dimming parameters for each light source; Blue light is: 30% * (50 + 1) / 50 = 30.6%; White light is: 40% * (50 + 1) / 50 = 40.8%; The red light percentage is: 20% * (50 + 1) / 50 = 20.4%; Far-red light is: 50% * (50 + 1) / 50 = 51%; This yields the dimming parameters for each light source, namely, the spectral value of blue light is 30.6%; the spectral value of white light is 40.8%; the spectral value of red light is 20.4%; and the spectral value of far-red light is 51%. Based on the corresponding spectral parameters, proportional light intensity compensation is achieved for multiple LED light sources, maintaining a constant spectral ratio throughout the process. If, after light intensity compensation, the overall output light intensity of the LED lights is still lower than the light intensity required by the plants, then repeat step S2.3.
[0011] This invention effectively counteracts interference from operating conditions such as temperature drift, LED aging, and voltage fluctuations through real-time operating condition data acquisition and closed-loop iterative calibration. It maintains high-precision dimming and spectral stability over a long period, improving the supplemental lighting effect in agriculture. Furthermore, this invention is not limited to four types of LED light sources and can be adapted to any number of agricultural LED lighting fixtures with two or more channels. Regardless of whether the light intensity is high or low, this invention can dynamically adjust the light intensity while maintaining a constant spectrum, achieving adjustable light intensity and an absolutely constant spectrum, thereby meeting the light intensity and spectral requirements for plant growth.
[0012] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0013] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A method for dynamic adjustment of multi-channel LED light intensity compensation, characterized in that: Includes the following steps: S1. Pre-calibrate the parameters of the multiple LED light sources of the LED lamp, determine the reference spectrum of each LED light source, and construct a constant spectral reference model; S2. Real-time acquisition of the overall output light intensity of LED lights, combined with the light intensity required by the plants, dynamically calculates the target compensation light intensity of each LED light source to obtain precise dimming parameters for each path. S3. Synchronously adjust the driving power of all LED light sources according to the dimming parameters to achieve proportional light intensity compensation of multiple LED light sources and maintain constant spectral ratio throughout the process. S4. Verify the light intensity and spectral parameters after dimming in real time, and repeat step S2 to iteratively calibrate the compensation amount to form a closed-loop dynamic adjustment.
2. The method for dynamic adjustment of multi-channel LED light intensity compensation according to claim 1, characterized in that: In step S1, the LED lamp includes four LED light sources: blue light, white light, red light, and far-red light.
3. The method for dynamic adjustment of multi-channel LED light intensity compensation according to claim 1, characterized in that: In step S1, after determining the reference spectrum of each LED light source, the method further includes: obtaining the maximum spectral value max among the multiple LED light sources, comparing the maximum spectral value max with the preset minimum spectral value and the preset maximum spectral value simultaneously; if the maximum spectral value max is different from both the preset minimum spectral value and the preset maximum spectral value, then proceed to step S2; if the maximum spectral value max is equal to the preset minimum spectral value or the preset maximum spectral value, then end the light intensity adjustment.
4. The method for dynamic adjustment of multi-channel LED light intensity compensation according to claim 1, characterized in that: Step S2 includes the following steps: S2.
1. Collect the overall output light intensity of the LED lamps in real time, compare the overall output light intensity of the LED lamps with the light intensity required by the plants. If it is higher than the light intensity required by the plants, proceed to step S2.2; if it is lower than the light intensity required by the plants, proceed to step S2.
3. S2.2 Determine whether the minimum spectral value min in the multi-channel LED light source is greater than the minimum spectral threshold. If yes, proceed to step S2.4; otherwise, end the light intensity adjustment. S2.3 Determine whether the maximum spectral value max among the multiple LED light sources is less than the preset maximum spectral value. If yes, proceed to step S2.5; otherwise, end the light intensity adjustment. S2.4, According to the formula: To obtain the dimming parameters for each light source; in, Indicates the number of LED light sources. ; Indicates the first The spectral values of the road light source, and ; S2.5, According to the formula: Obtain the dimming parameters for each light source.
5. The method for dynamic adjustment of multi-channel LED light intensity compensation according to claim 4, characterized in that: In step S4, the light intensity and spectral parameters after dimming are verified in real time, and step S2.1 is repeated to iteratively calibrate the compensation amount until the light intensity adjustment ends, thereby forming a closed-loop dynamic adjustment.