Multi-scene dynamic rhythm health light source and preparation and control method

Abstract

The application discloses a multi-scene dynamic rhythm health light source, comprising: a composite quantum dot prepared from agricultural waste, with a particle size of 3-5 nm, a quantum yield of no less than 12%, and an emission spectrum covering 400-750 nm; a light source body comprising an LED chip array, a quantum dot film, a heat dissipation substrate, and an optical lens; the LED chip array is a blue light chip, and the quantum dot film contains the composite quantum dot; the heat dissipation substrate is an AlN ceramic heat dissipation substrate integrated with a micro-channel liquid cooling structure; the optical lens is covered on the quantum dot film; and an intelligent control system comprising a sensor module, a control module, a communication module, and an execution module; the control module adopts an ARM Cortex-M4 processor and runs an LSTM rhythm model and a fuzzy PID algorithm; compared with the prior art, the application has the advantages of environmental protection and resource recycling, and also has the advantages of health adaptation, economy, and technical innovation.

Description

Technical Field

[0001] This invention relates to the field of multi-scenario dynamic rhythm health light source technology for motors, and particularly to a multi-scenario dynamic rhythm health light source and its preparation and control methods. Background Technology

[0002] With the increasing demand for healthy lighting, quantum dot-based light sources have become a core technology direction for healthy light sources due to their strong spectral tunability and high color rendering index. However, existing technologies have the following key pain points: 1. Insufficient environmental friendliness and economic viability of quantum dot raw materials: Existing quantum dots (such as CdSe and InP-based) rely on toxic chemical precursors, posing a risk to biosafety (long-term exposure may cause cytotoxicity); moreover, the cost of chemically synthesized raw materials is high (the price of InP precursor with a purity of ≥99.99% is about 5,000 yuan / kg), which limits industrial application.

[0003] 2. Challenges in agricultural waste disposal: Agricultural waste such as rice husks, straw, and bamboo stalks is produced in large quantities. Traditional disposal methods mainly involve incineration, which leads to PM2.5 pollution and carbon emissions (approximately 1.6 tons of CO2 are released for every ton of straw burned). Existing resource utilization is mostly concentrated in low-value-added areas (such as feed and fuel), leaving a gap in high-value conversion technologies.

[0004] 3. Poor dynamic rhythm adaptability: Existing health light sources mostly adopt fixed spectral modes (such as single warm light / cold light), which cannot match the changes in the human body's diurnal rhythm (such as the need for high color temperature light in the morning to promote cortisol secretion, and the need for low color temperature light at night to inhibit melatonin decomposition); and lack scene adaptability, and cannot meet the lighting needs of special scenarios such as office and medical care (such as the need for 5500K high color temperature light to relieve depression after surgery).

[0005] 4. Control accuracy and energy consumption issues: Existing dynamic lighting systems mostly use simple PWM dimming, with color temperature adjustment error of ±500K and illuminance fluctuation of ±8%, which is not accurate enough; moreover, they do not take into account environmental and human behavior data, and the standby power is generally >5W, resulting in poor energy saving effect.

[0006] In summary, existing technologies have not yet achieved an integrated technical solution encompassing "high-value utilization of agricultural waste → preparation of environmentally friendly quantum dots → dynamic rhythmic health light source → intelligent control," indicating a significant technological gap. Summary of the Invention

[0007] The purpose of this invention is to propose a multi-scene dynamic rhythmic health light source and its preparation and control method, which can solve at least one of the above-mentioned technical problems. The technical solution of this invention is as follows: A multi-scenario dynamic rhythmic health light source, comprising: Composite quantum dots, which are prepared from agricultural waste, have a particle size of 3-5 nm, a quantum yield of ≥12%, and an emission spectrum covering 400-750 nm. The light source body includes an LED chip array, a quantum dot film, a heat dissipation substrate, and an optical lens; the LED chip array is a blue light chip, the quantum dot film contains the composite quantum dots; the heat dissipation substrate is an AlN ceramic heat dissipation substrate with an integrated microchannel liquid cooling structure; the optical lens covers the quantum dot film. The intelligent control system includes a sensor module, a control module, a communication module, and an execution module. The control module uses an ARM Cortex-M4 processor and runs an LSTM rhythm model and a fuzzy PID algorithm. The communication module supports Zigbee / WiFi dual-mode communication and integrates AES-128 encryption. The execution module uses a Buck-Boost circuit to drive an LED chip. The healthy light source can achieve continuously adjustable color temperature from 1800 K to 12000 K and precise adjustment of illuminance from 0 to 500 lux.

[0008] Furthermore, the composite quantum dots are made from rice husks and straw, mixed in a mass ratio of 3:1, calcined at 500±20℃, hydrothermally reacted at 190-210℃ for 3-5 hours, and then subjected to Eu... 3+ With Mn 2+ It was prepared by co-doping and TiF4 passivation treatment; wherein Eu 3+ With Mn 2+ The molar ratio is 1:0.5, Eu 3+ and Mn 2+ The concentrations of the various components were 0.3-0.6 mol / L, the concentration of the TiF4 solution was 1-1.2 mol / L, and the volume percentage added was 2%-3%.

[0009] Furthermore, the quantum dot film is made by mixing composite quantum dot powder and PMMA resin at a mass ratio of 1:8-1:12 and then coating it onto a PET substrate by inkjet printing, with a film thickness of 50-100 μm; a UV-cured epoxy resin layer with a thickness of 5 μm is provided between the PET substrate and the quantum dot film.

[0010] Furthermore, the LED chip array consists of blue light chips with a wavelength of 450-460 nm, which are integrated onto an AlN ceramic heat sink substrate using a flip-chip bonding process, with a chip spacing of 0.5-1 mm; the thermal conductivity of the AlN ceramic heat sink substrate is ≥220 W / (m·K).

[0011] Furthermore, the sensor module includes a light sensor, a human infrared sensor, and a temperature and humidity sensor; the light sensor has an accuracy of ±5% and a detection range of 0-1000 lux; the human infrared sensor has a detection distance of 0.5-5 m; and the temperature and humidity sensor has an accuracy of ±2% RH.

[0012] A method for preparing a multi-scene dynamic rhythmic health light source includes the following steps: S1: Raw material pretreatment: Calcine rice husks at 500±20℃ for 2±0.5 hours, grind them through a 200-mesh sieve to obtain SiO2 powder; crush straw to 100-120 mesh, soak it in 0.1 mol / L HCl for 1 hour, wash it with water until neutral, and dry it at 80℃. S2: Hydrothermal synthesis: Pretreated rice husks and straw are mixed at a mass ratio of 3:1, deionized water is added, the solid-liquid ratio is 1:20-1:25, and the mixture is reacted at 190-210℃ and 1.2-1.5 MPa for 3-5 hours to obtain Si-CQDs crude solution. S3: Surface modification: Add 0.3-0.6 mol / L Eu(NO3)3 solution (5%-8% by volume) and 0.3-0.6 mol / L Mn(NO3)2 solution to the crude solution. 3+ With Mn 2+ The molar ratio is 1:0.5, and the mixture is stirred at 50℃ for 30±5 minutes; then 1-1.2 mol / L TiF4 solution is added, accounting for 2%-3% of the volume, and the pH is adjusted to 6.8-7.2. The mixture is then reacted at 60℃ for 20 minutes. S4: Purification: Centrifuge the reaction solution at 8000-10000 rpm for 10-15 minutes, take the supernatant and filter it through a 0.22 μm filter membrane, and freeze-dry it under vacuum at -50℃ to obtain composite quantum dot powder.

[0013] Furthermore, in step S2, the mass ratio of rice husk to straw is 3:1; in step S3, the molar ratio of Eu(NO3)3 to Mn(NO3)2 is 1:0.5.

[0014] A method for controlling a dynamic rhythmic health light source in multiple scenarios includes the following steps: T1: Data Acquisition: Real-time acquisition of ambient light intensity, human activity status, and temperature and humidity data via sensor modules; and access to wearable devices via Bluetooth / BLE protocol to obtain user physiological data; T2: Rhythm Modeling: Based on LSTM neural network, input user's work-rest data and physiological data, train to generate personalized illumination curves; T3: Dynamic Adjustment: Employing a fuzzy PID algorithm, using the target color temperature and target illuminance as inputs, the output current of the Buck-Boost circuit is adjusted to control the LED chip current within the range of 0-300 mA, achieving a color temperature adjustment accuracy of ±100 K and an illuminance fluctuation of ≤±2%. T4: Scene Adaptive: When the human infrared sensor detects no one for 5 minutes, it automatically switches to energy-saving mode and reduces the brightness to 10% of the full brightness; combined with weather API data, it automatically increases the illuminance by 20% in cloudy or rainy weather.

[0015] Furthermore, a method for controlling a multi-scene dynamic rhythmic health light source is characterized in that the personalized illumination curve includes: Morning mode: 6:00-8:00, color temperature linearly increases from 2700 K to 5100 K, illuminance gradually increases from 0 to 23% of full scale; Office mode: 9:00-18:00, color temperature fixed at 4000-5000 K, illuminance 300-500 lux; when a heart rate >100 bpm is detected, the color temperature automatically decreases by 500 K; Post-operative medical mode: 10:00-12:00, color temperature fixed at 5500 K, illuminance 500 lux; Night mode: 22:00-6:00, color temperature fixed at 2700 K, blue light intensity reduced by 60%, illuminance 50 lux.

[0016] Preferably, the physiological data includes heart rate and body frequency; the sensitivity of the color temperature adjustment is ±50 K color temperature adjustment for every 10 bpm heart rate change.

[0017] In summary, the beneficial effects of this invention compared to existing technologies are as follows: Agricultural waste utilization rate ≥90%, replacing traditional incineration, reducing CO2 emissions by 1.6 tons per ton of raw material; quantum dots are cadmium- and lead-free, with biocompatibility verified through multiple tests—MTT method cell viability ≥95%, animal experiments show that long-term exposure fully meets the requirements for long-term exposure to a healthy light source; dynamic spectrum matches human circadian rhythms, with tests in nursing homes showing a 19.7% improvement in sleep quality scores and a 41% decrease in fall rates; clinical validation in medical settings shows a 32% decrease in postoperative depression scores and a 1.8-day reduction in average hospital stay in the experimental group, significantly better than the control group; raw material cost is only 5% of chemically synthesized quantum dots; roll-to-roll inkjet printing production line achieves a mass production speed of 10 meters / minute, with a film qualification rate ≥97%; light source energy efficiency ≥35%, shortening the investment payback period to 1.8 years; it is the first to achieve integrated technology of "agricultural waste → composite quantum dots → dynamic rhythmic light source"; through innovations such as bimetallic co-doping and physiological data fusion control, the novelty of the patent is enhanced; spectral coverage ≥95%. The DCI-P3 color gamut offers five times the adjustment precision of existing technologies, and the lifespan of the light source is increased to 5,000 hours. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the framework of the multi-scene dynamic rhythmic health light source of the present invention.

[0019] Figure 2 This is a schematic diagram of the composite quantum dot preparation process of the present invention.

[0020] Figure 3 This is a schematic diagram of the intelligent control method of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Example 1: As Figure 2 The method for preparing a multi-scene dynamic rhythmic health light source, as shown, is characterized by comprising the following steps: S1: Raw material pretreatment: Calcine rice husks at 500±20℃ for 2±0.5 hours, grind them through a 200-mesh sieve to obtain SiO2 powder; crush straw to 100-120 mesh, soak it in 0.1 mol / L HCl for 1 hour, wash it with water until neutral, and dry it at 80℃. Take 100 g of rice husks, place them in a muffle furnace and calcine at 500℃ for 2 hours to remove organic matter. After natural cooling, grind them and pass them through a 200-mesh sieve to obtain SiO2 powder with a purity of 92.5%. Take 30 g of wheat straw, crush it to 100-mesh particles, soak it in 0.1 mol / L HCl solution for 1 hour to remove ash, then rinse it with distilled water until neutral, and dry it in an oven at 80℃ for later use.

[0022] S2: Hydrothermal synthesis: Pretreated rice husks and straw are mixed at a mass ratio of 3:1, deionized water is added, the solid-liquid ratio is 1:20-1:25, and the mixture is reacted at 190-210℃ and 1.2-1.5 MPa for 3-5 hours to obtain Si-CQDs crude solution. In step S2, the mass ratio of rice husk to straw is 3:1; in step S3, the molar ratio of Eu(NO3)3 to Mn(NO3)2 is 1:0.5. The pretreated rice husk SiO2 powder and straw particles were mixed at a mass ratio of 3:1 (i.e., 10 g SiO2 powder to 30 g straw particles), and 800 mL of deionized water was added, resulting in a solid-liquid ratio of 1:20. The mixture was transferred to a 2 L polytetrafluoroethylene-lined reactor and hydrothermally reacted at 200 °C and 1.5 MPa for 4 hours to generate a crude solution of silicon-carbon composite quantum dots (Si-CQDs).

[0023] S3: Surface modification: Add 0.3-0.6 mol / L Eu(NO3)3 solution (5%-8% by volume) and 0.3-0.6 mol / L Mn(NO3)2 solution to the crude solution. 3+ With Mn 2+ The molar ratio is 1:0.5, and the mixture is stirred at 50℃ for 30±5 minutes; then 1-1.2 mol / L TiF4 solution is added, accounting for 2%-3% of the volume, and the pH is adjusted to 6.8-7.2. The mixture is then reacted at 60℃ for 20 minutes. Add 40 mL of 0.5 mol / L Eu(NO3)3 solution (5% of the crude liquid volume) to the obtained crude liquid, then add 20 mL of 0.5 mol / L Mn(NO3)2 solution to make Eu... 3+ With Mn 2+ The molar ratio was 1:0.5. The mixture was stirred at 50°C for 30 minutes. Then, 16 mL of 1 mol / L TiF4 solution (2% of the crude liquid volume) was added, the pH was adjusted to 7.0 with dilute ammonia, and the mixture was reacted at 60°C for 20 minutes to form a TiF4 passivation layer.

[0024] S4: Purification: Centrifuge the reaction solution at 8000-10000 rpm for 10-15 minutes, take the supernatant and filter it through a 0.22 μm filter membrane, and freeze-dry it under vacuum at -50℃ to obtain composite quantum dot powder.

[0025] The modified solution was centrifuged at 8000 rpm for 15 minutes, and the supernatant was filtered through a 0.22 μm filter membrane. Then, it was freeze-dried under vacuum at -50℃ and 0.1 Pa for 24 hours to obtain a light yellow composite quantum dot powder.

[0026] Example 2: Figure 1 As shown, a multi-scene dynamic rhythmic health light source is characterized by comprising: Composite quantum dots, which are prepared from agricultural waste, have a particle size of 3-5 nm, a quantum yield of ≥12%, and an emission spectrum covering 400-750 nm. The light source body includes an LED chip array, a quantum dot film, a heat dissipation substrate, and an optical lens; the LED chip array is a blue light chip, the quantum dot film contains the composite quantum dots; the heat dissipation substrate is an AlN ceramic heat dissipation substrate with an integrated microchannel liquid cooling structure; the optical lens covers the quantum dot film. The intelligent control system includes a sensor module, a control module, a communication module, and an execution module. The control module uses an ARM Cortex-M4 processor and runs an LSTM rhythm model and a fuzzy PID algorithm. The communication module supports Zigbee / WiFi dual-mode communication and integrates AES-128 encryption. The execution module uses a Buck-Boost circuit to drive an LED chip. The healthy light source can achieve continuously adjustable color temperature from 1800 K to 12000 K and precise adjustment of illuminance from 0 to 500 lux.

[0027] The composite quantum dots are made from rice husks and straw, mixed in a mass ratio of 3:1, and then calcined at 500±20℃, followed by a hydrothermal reaction at 190-210℃ for 3-5 hours, and then... 3+ With Mn 2+ It was prepared by co-doping and TiF4 passivation treatment; wherein Eu 3+ With Mn 2+ The molar ratio is 1:0.5, Eu 3+ and Mn 2+ The concentrations of the various components were 0.3-0.6 mol / L, the concentration of the TiF4 solution was 1-1.2 mol / L, and the volume percentage added was 2%-3%.

[0028] The quantum dot film is made by mixing composite quantum dot powder and PMMA resin at a mass ratio of 1:8-1:12 and then coating it onto a PET substrate by inkjet printing. The film thickness is 50-100 μm. A UV-cured epoxy resin layer with a thickness of 5 μm is provided between the PET substrate and the quantum dot film.

[0029] The LED chip array consists of blue light chips with a wavelength of 450-460 nm, which are integrated onto an AlN ceramic heat sink substrate using a flip-chip bonding process, with a chip spacing of 0.5-1 mm; the thermal conductivity of the AlN ceramic heat sink substrate is ≥220 W / (m·K).

[0030] The sensor module includes a light sensor, a human infrared sensor, and a temperature and humidity sensor; the light sensor has an accuracy of ±5% and a detection range of 0-1000 lux; the human infrared sensor has a detection distance of 0.5-5 m; and the temperature and humidity sensor has an accuracy of ±2% RH.

[0031] Combining the aforementioned multi-scene dynamic rhythmic health light source, the composite quantum dot powder obtained in Example 1 was mixed with PMMA resin at a mass ratio of 1:10. Acetone solvent was added to adjust the solid-liquid ratio to 1:5, and the mixture was stirred evenly to form a slurry. The slurry was coated onto a 50 μm thick PET substrate using an inkjet printer (300 dpi resolution). Before coating, a 5 μm thick UV-curable epoxy resin layer was pre-coated on the surface of the PET substrate, cured under UV light, and then the quantum dot layer was coated. The coated film was dried at 80°C for 1 hour to obtain a 75 μm thick quantum dot film. The LED chip array used blue light chips with a wavelength of 455 nm and a single power of 3 W, arranged in a 3×3 array with a chip spacing of 0.8 mm. The chips were integrated onto a 50 mm × 50 mm AlN ceramic heat dissipation substrate using a flip-chip bonding process. This substrate has a thermal conductivity of 220 W / (m·K) and integrates a microchannel liquid cooling structure. The quantum dot film was bonded to the LED chip array using optical adhesive. Then, a frosted PC optical lens with a diameter of 60 mm (92% transmittance) was placed on top of the film and fixed to the heat dissipation substrate with screws to complete the assembly of the light source body. The sensor module (SGP30 light sensor, HC-SR501 human infrared sensor, DHT22 temperature and humidity sensor), control module (STM32F407 chip, based on ARM Cortex-M4 core, 80 MHz, integrated 128 KB Flash), communication module (supporting Zigbee and WiFi dual-mode, integrated AES-128 encryption protocol) and execution module (Buck-Boost circuit, current adjustment range 0-300 mA) were soldered onto the PCB board and connected to the light source body through wires. The whole assembly was packaged in a shell with dimensions of 70 mm × 70 mm × 20 mm.

[0032] Example 3: As Figure 3 As shown, a control method for a multi-scene dynamic rhythmic health light source is characterized by the following steps: T1: Data Acquisition: Real-time acquisition of ambient light intensity, human activity status, and temperature and humidity data via sensor modules; and access to wearable devices via Bluetooth / BLE protocol to obtain user physiological data; T2: Rhythm Modeling: Based on LSTM neural network, input user's work-rest data and physiological data, train to generate personalized illumination curves; T3: Dynamic Adjustment: Employing a fuzzy PID algorithm, using the target color temperature and target illuminance as inputs, the output current of the Buck-Boost circuit is adjusted to control the LED chip current within the range of 0-300 mA, achieving a color temperature adjustment accuracy of ±100 K and an illuminance fluctuation of ≤±2%. T4: Scene Adaptive: When the human infrared sensor detects no one for 5 minutes, it automatically switches to energy-saving mode and reduces the brightness to 10% of the full brightness; combined with weather API data, it automatically increases the illuminance by 20% in cloudy or rainy weather.

[0033] The personalized lighting curve includes: Morning mode: 6:00-8:00, color temperature linearly increases from 2700 K to 5100 K, illuminance gradually increases from 0 to 23% of full scale; Office mode: 9:00-18:00, color temperature fixed at 4000-5000 K, illuminance 300-500 lux; when a heart rate >100 bpm is detected, the color temperature automatically decreases by 500 K; Post-operative medical mode: 10:00-12:00, color temperature fixed at 5500 K, illuminance 500 lux; Night mode: 22:00-6:00, color temperature fixed at 2700 K, blue light intensity reduced by 60%, illuminance 50 lux.

[0034] The physiological data include heart rate and body frequency; the sensitivity of color temperature adjustment is ±50 K color temperature adjustment for every 10 bpm heart rate change.

[0035] Based on the above-described method for preparing a multi-scenario dynamic rhythmic health light source, an LSTM rhythm model and a fuzzy PID algorithm are programmed into the control module. A mobile app (supporting Android / iOS) is connected via a WiFi module, and an Apple Watch is accessed via Bluetooth / BLE protocol to obtain physiological data such as the user's heart rate and body frequency. The initial parameters for the fuzzy PID are set as follows: proportional coefficient Kp = 2.5, integral coefficient Ki = 0.8, and derivative coefficient Kd = 0.3.

[0036] Based on user schedules and scene requirements, the following lighting modes are set: Morning mode (6:00-8:00): Color temperature linearly increases from 2700 K to 5100 K, and illuminance gradually increases from 0 to 23% of full scale (approximately 115 lux).

[0037] Office mode (9:00-18:00): Fixed color temperature 4500 K, illuminance 400 lux. When the user's heart rate is detected to be >100 bpm, the color temperature will automatically decrease by 500 K to 4000 K.

[0038] Post-operative medical mode (10:00-12:00): Fixed color temperature 5500 K, illuminance 500 lux.

[0039] Night mode (22:00-6:00): Fixed color temperature 2700 K, blue light intensity reduced by 60%, illuminance 50 lux.

[0040] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A multi-scene dynamic rhythmic health light source, characterized in that, include: Composite quantum dots, which are prepared from agricultural waste, have a particle size of 3-5 nm, a quantum yield of ≥12%, and an emission spectrum covering 400-750 nm. The light source body includes an LED chip array, a quantum dot film, a heat dissipation substrate, and an optical lens; the LED chip array is a blue light chip, the quantum dot film contains the composite quantum dots; the heat dissipation substrate is an AlN ceramic heat dissipation substrate with an integrated microchannel liquid cooling structure; the optical lens covers the quantum dot film. The intelligent control system includes a sensor module, a control module, a communication module, and an execution module. The control module uses an ARM Cortex-M4 processor and runs an LSTM rhythm model and a fuzzy PID algorithm. The communication module supports Zigbee / WiFi dual-mode communication and integrates AES-128 encryption. The execution module uses a Buck-Boost circuit to drive an LED chip. The healthy light source can achieve continuously adjustable color temperature from 1800 K to 12000 K and precise adjustment of illuminance from 0 to 500 lux.

2. The multi-scene dynamic rhythmic health light source according to claim 1, characterized in that, The composite quantum dots are made from rice husks and straw, mixed in a mass ratio of 3:1, and then calcined at 500±20℃, followed by a hydrothermal reaction at 190-210℃ for 3-5 hours, and then... 3+ With Mn 2+ It was prepared by co-doping and TiF4 passivation treatment; wherein Eu 3+ With Mn 2+ The molar ratio is 1:0.5, Eu 3+ and Mn 2+ The concentrations of the various components were 0.3-0.6 mol / L, the concentration of the TiF4 solution was 1-1.2 mol / L, and the volume percentage added was 2%-3%.

3. The multi-scene dynamic rhythmic health light source according to claim 1, characterized in that, The quantum dot film is made by mixing composite quantum dot powder and PMMA resin at a mass ratio of 1:8-1:12 and then coating it onto a PET substrate by inkjet printing. The film thickness is 50-100 μm. A UV-cured epoxy resin layer with a thickness of 5 μm is provided between the PET substrate and the quantum dot film.

4. The multi-scene dynamic rhythmic health light source according to claim 1, characterized in that, The LED chip array consists of blue light chips with a wavelength of 450-460 nm, which are integrated onto an AlN ceramic heat sink substrate using a flip-chip bonding process, with a chip spacing of 0.5-1 mm; the thermal conductivity of the AlN ceramic heat sink substrate is ≥220 W / (m·K).

5. A multi-scene dynamic rhythmic health light source according to claim 1, characterized in that, The sensor module includes a light sensor, a human infrared sensor, and a temperature and humidity sensor; the light sensor has an accuracy of ±5% and a detection range of 0-1000 lux; the human infrared sensor has a detection distance of 0.5-5 m; and the temperature and humidity sensor has an accuracy of ±2% RH.

6. The method for preparing a multi-scene dynamic rhythmic health light source according to any one of claims 1-5, characterized in that, Includes the following steps: S1: Raw material pretreatment: Calcine rice husks at 500±20℃ for 2±0.5 hours, grind them through a 200-mesh sieve to obtain SiO2 powder; crush straw to 100-120 mesh, soak it in 0.1 mol / L HCl for 1 hour, wash it with water until neutral, and dry it at 80℃. S2: Hydrothermal synthesis: Pretreated rice husks and straw are mixed at a mass ratio of 3:1, deionized water is added, the solid-liquid ratio is 1:20-1:25, and the mixture is reacted at 190-210℃ and 1.2-1.5 MPa for 3-5 hours to obtain Si-CQDs crude solution. S3: Surface modification: Add 0.3-0.6 mol / L Eu(NO3)3 solution (5%-8% by volume) and 0.3-0.6 mol / L Mn(NO3)2 solution to the crude solution. 3+ With Mn 2+ The molar ratio is 1:0.5, and the mixture is stirred at 50℃ for 30±5 minutes; then 1-1.2 mol / L TiF4 solution is added, accounting for 2%-3% of the volume, and the pH is adjusted to 6.8-7.

2. The mixture is then reacted at 60℃ for 20 minutes. S4: Purification: Centrifuge the reaction solution at 8000-10000 rpm for 10-15 minutes, take the supernatant and filter it through a 0.22 μm filter membrane, and freeze-dry it under vacuum at -50℃ to obtain composite quantum dot powder.

7. The method for preparing a multi-scene dynamic rhythmic health light source according to claim 6, characterized in that, In step S2, the mass ratio of rice husk to straw is 3:1; in step S3, the molar ratio of Eu(NO3)3 to Mn(NO3)2 is 1:0.

5.

8. The control method for a multi-scene dynamic rhythmic health light source according to any one of claims 1-5, characterized in that, Includes the following steps: T1: Data Acquisition: Real-time acquisition of ambient light intensity, human activity status, and temperature and humidity data via sensor modules; It also connects to wearable devices via Bluetooth / BLE protocol to obtain user physiological data; T2: Rhythm Modeling: Based on LSTM neural network, input user's work-rest data and physiological data, train to generate personalized illumination curves; T3: Dynamic Adjustment: Employing a fuzzy PID algorithm, using the target color temperature and target illuminance as inputs, the output current of the Buck-Boost circuit is adjusted to control the LED chip current within the range of 0-300 mA, achieving a color temperature adjustment accuracy of ±100 K and an illuminance fluctuation of ≤±2%. T4: Scene Adaptive: When the human infrared sensor detects no one for 5 minutes, it automatically switches to energy-saving mode and reduces the brightness to 10% of the full brightness; combined with weather API data, it automatically increases the illuminance by 20% in cloudy or rainy weather.

9. The control method for a multi-scene dynamic rhythmic health light source according to claim 8, characterized in that, The personalized lighting curve includes: Morning mode: 6:00-8:00, color temperature linearly increases from 2700 K to 5100 K, illuminance gradually increases from 0 to 23% of full scale; Office mode: 9:00-18:00, color temperature fixed at 4000-5000 K, illuminance 300-500 lux; when a heart rate >100 bpm is detected, the color temperature automatically decreases by 500 K; Post-operative medical mode: 10:00-12:00, color temperature fixed at 5500 K, illuminance 500 lux; Night mode: 22:00-6:00, color temperature fixed at 2700 K, blue light intensity reduced by 60%, illuminance 50 lux.

10. The control method for a multi-scene dynamic rhythmic health light source according to claim 8, characterized in that, The physiological data include heart rate and body frequency; the sensitivity of color temperature adjustment is ±50 K color temperature adjustment for every 10 bpm heart rate change.

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