Method and system for generating and controlling aromatic natural wind based on multi-parameter coupling

Abstract

This invention proposes a method and system for generating and controlling aromatherapy-inspired natural wind based on multi-parameter coupling, relating to the fields of indoor environmental regulation and intelligent control. It includes: constructing a simulated natural dynamic airflow field using three fans equipped with aromatherapy release devices; generating a random wind speed sequence by correcting an initial random wind speed based on preset wind speed gradient levels and hydrodynamic characteristics, and driving each fan to deliver air at preset time phase differences; controlling the gas release amount of the aromatherapy release devices based on fan wind speed information and environmental feedback; and collecting skin temperature and heart rate variability data of subjects to adjust the wind speed amplitude based on feedback. This invention improves indoor thermal comfort and enhances cognitive performance and overall indoor living experience by constructing a simulated natural dynamic airflow field combined with dynamic aromatherapy diffusion and skin temperature feedback regulation.

Description

Technical Field

[0001] This invention relates to the field of indoor environment regulation and intelligent control technology, and in particular to a method and system for generating and controlling natural-looking fragrance based on multi-parameter coupling. Background Technology

[0002] Indoor spaces are the core spaces where people spend a lot of time and energy. Indoor thermal comfort and environmental quality are directly related to human health and work efficiency. Creating an indoor airflow environment that is close to nature and suitable for human comfort is of great practical significance.

[0003] Existing technologies still have many shortcomings: traditional devices mostly output constant unidirectional airflow, which cannot replicate the random fluctuations and multidirectional disturbances of natural wind, resulting in a monotonous sensation that easily leads to fatigue, and it is difficult to create a wraparound airflow; there is a lack of linkage and coupling control with aroma diffusion, resulting in uneven odor diffusion and poor penetration; existing wind simulation schemes cannot realize the non-periodic random wind speed changes of natural wind, nor can they achieve precise control of multi-point asymmetric sensory stimulation, and they cannot take into account the matching of aroma concentration with human body cooling sensation; at the same time, the devices lack interaction with human body sensation and lack feedback adjustment mechanisms, making it difficult to meet refined and individualized thermal comfort needs. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a method and system for generating and controlling aroma-simulated natural wind based on multi-parameter coupling. By combining dynamic airflow generation and aroma diffusion control that mimics natural wind, it can not only effectively improve the thermal comfort of the human body in warmer environments, but also enhance the comfort and pleasure brought by the environment through olfactory stimulation, thereby improving the relaxation effect on the mind and body.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for generating and controlling aromatic mimicking natural wind based on multi-parameter coupling, comprising: A natural dynamic airflow field is constructed based on three fans equipped with fragrance release devices; Given an initial random wind speed, the wind speed is corrected according to the preset wind speed gradient level and hydrodynamic characteristics, a random wind speed sequence is generated, and each fan is driven to deliver air at a preset time phase difference. The amount of gas released by the aroma release device is controlled based on fan speed information and environmental feedback. The subjects' skin temperature and heart rate variability data were collected to provide feedback for adjusting the wind speed amplitude.

[0006] Secondly, the present invention provides a fragrance-mimicking natural wind generation and control system based on multi-parameter coupling, comprising: The airflow field construction module is configured to construct a natural dynamic airflow field based on three fans equipped with aroma release devices; The natural wind generation module is configured to, given an initial random wind speed, correct it according to the preset wind speed gradient level and hydrodynamic characteristics, generate a random wind speed sequence, and drive each fan to deliver air at a preset time phase difference step. The aroma diffusion module is configured to control the amount of gas released by the aroma release device based on fan speed information and environmental feedback. The feedback control module is configured to collect the subject's skin temperature data and heart rate variability data, and adjust the wind speed amplitude accordingly.

[0007] Thirdly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the method for generating and controlling odor mimicking natural wind based on multi-parameter coupling described in the first aspect.

[0008] Fourthly, the present invention provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps in the method for generating and controlling a fragrance mimicking natural wind based on multi-parameter coupling described in the first aspect.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a three-fan configuration to create a stable airflow field, providing a fundamental flow environment for uniform aroma diffusion. By combining the initial random wind speed with preset wind speed gradients and hydrodynamic characteristics for verification and correction, a wind speed sequence that closely resembles the natural wind's variation is generated. Each fan is controlled to deliver air at preset time-phase differences, achieving continuous and smooth deflection of the synthetic airflow direction without altering the fans' rated speed, effectively enhancing the airflow's coverage and smoothness. Simultaneously, the gas release is controlled in conjunction with fan speed information and environmental parameters to achieve a match between odor release and the airflow field. Furthermore, by collecting physiological data on subject skin temperature and heart rate variability, a closed-loop feedback mechanism is used to adjust the wind speed amplitude, dynamically optimizing the airflow output based on the human body's physiological comfort. This invention balances the realism of natural wind simulation, the uniformity of odor diffusion, and human physiological comfort, with reasonable control logic and strong adaptability. This invention is applicable to personalized comfort enhancement in smart homes, office spaces, classrooms, and health and wellness environments, providing a new technical approach for personalized ventilation and aroma environment control.

[0010] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0011] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute a limitation thereof.

[0012] Figure 1 A main flowchart of a method for generating and controlling aromatic mimicking natural wind based on multi-parameter coupling provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of a triangular simulated natural dynamic airflow field provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the fan control device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the experimental steps provided in the embodiments of the present invention; Figure 5 A schematic diagram illustrating the hourly average skin temperature changes of subjects during an experiment provided in this embodiment of the invention. Figure 6 The diagrams provided in this embodiment of the invention illustrate the thermal sensation voting and thermal comfort voting of the subjects during the experimental process; wherein, (a) is a diagram of thermal sensation voting and (b) is a diagram of thermal comfort voting. Figure 7 A schematic diagram of the reaction time and comprehensive performance index of the subjects during the experiment provided in the embodiment of the present invention; wherein, (a) is a schematic diagram of reaction time and (b) is a schematic diagram of comprehensive performance index; The components are as follows: 1-Computer; 2-Dedicated USB cable; 3-Development board; 4-Male and female DuPont wires; 5-SCR module; 6-Power cord (220V input); 7-Main power socket; 8-Power strip (220V output); 9-Floor fan. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] As the primary places where people spend a significant amount of time and energy, the indoor environment's thermal comfort and overall experience directly impact human health and work efficiency. Current indoor airflow control primarily relies on air conditioning or fan systems, but their airflow output and user experience still have shortcomings. First, traditional equipment mostly outputs constant airflow, which lacks naturalness and makes it difficult to reproduce the random fluctuations, multi-directional disturbances and dynamic rhythms of natural wind. This can easily cause monotony and fatigue in people after prolonged exposure. In addition, the existing air supply method is mainly unidirectional, which makes it difficult to create a sense of envelopment for areas such as the back and sides of the human body. The stimulation direction is limited, which weakens the simulation and comfort. Secondly, although some fan systems are already equipped with aroma diffusion devices, most of them are independent devices and lack coupling control with the airflow system. This limits the application of aroma and results in a limited or uneven distribution of the scent diffusion range, making it difficult to achieve the effect of diffusion with the wind and natural penetration. At the same time, although some improvement solutions attempt to simulate the feeling of wind through periodic changes, the dynamic control is insufficient. They lack precise control over "non-periodic random wind speed changes" and "multi-point asymmetric stimulation", and also fail to take into account the coordinated optimization of aroma concentration adjustment and human body's cold adaptation.

[0015] In addition, human skin temperature, as an important physiological indicator reflecting the body's thermal state, can directly reflect the cooling effect of external airflow stimulation. However, existing fan devices generally do not utilize skin temperature feedback for automatic adjustment, and their output wind speed cannot be adjusted in real time according to the body's temperature sensation, which can easily lead to excessive cooling or insufficient cooling. Especially in warmer environments, the body's heat load is high, and the demand for wind speed changes significantly. Traditional equipment cannot meet the refined and individualized thermal comfort needs.

[0016] Therefore, this invention proposes a method, system, medium, and device for generating and controlling natural-sounding aromatic airflow based on multi-parameter coupling. Based on an open-source platform, it integrates core functions such as multi-fan natural-sounding airflow generation, dynamic aromatic diffusion, real-time infrared skin temperature monitoring and feedback, and wind speed regulation. Through the coordinated dynamic adjustment of airflow and odor, it not only improves thermal comfort but also enhances the pleasant experience of the environment. At the same time, it can automatically adjust the wind speed based on human physiological feedback, achieving intelligent, efficient, and personalized indoor comfort regulation, thereby breaking through the limitations of traditional fans or aromatic devices in improving comfort and immersion.

[0017] Example 1 like Figure 1 As shown, this embodiment discloses a method for generating and controlling aromatic mimicking natural wind based on multi-parameter coupling, including the following steps: S1: Based on three fans equipped with fragrance release devices, a natural dynamic airflow field is constructed; S2: Given an initial random wind speed, the wind speed is corrected according to the preset wind speed gradient level and fluid dynamic characteristics, a random wind speed sequence is generated, and each fan is driven to deliver air at a preset time phase difference step. S3: Control the gas release amount of the aroma release device based on fan speed information and environmental feedback; S4: Collect skin temperature data and heart rate variability data of the subjects, and adjust the wind speed amplitude accordingly.

[0018] Next, combined Figure 1 This embodiment provides a detailed description of a method for generating and controlling aromatic mimicking natural wind based on multi-parameter coupling.

[0019] (I) Construction of simulated natural dynamic airflow field In this embodiment, referring to a typical natural wind rose diagram, a triangular simulated natural dynamic airflow field is constructed using three fans, such as... Figure 2 As shown, the three fans are arranged in an equilateral triangle, placing the subject at the center of the dynamic airflow field: the two front fans face forward to provide stimulation to the front of the body, while the third fan at the back provides airflow stimulation to the back of the body.

[0020] The side length of the triangle can be set according to the needs of the scenario; in this embodiment, it is preferably 1.5m.

[0021] In terms of spatial structure design, this embodiment employs an equilateral triangle arrangement with three fans, placing the subject at the geometric center of the triangle. Since the distances from the three fans to the center point are equal, the attenuation of airflow in each direction during propagation is essentially the same, thus preventing any one direction of airflow from dominating the composite wind field for an extended period. Furthermore, based on relevant research, compared to ordinary irregular triangles or other fan wind field arrangements, the equilateral triangle structure can ensure air delivery while simultaneously introducing lateral airflow and ensuring the presence of rearward airflow, allowing the human body to be affected by airflow in the front, back, left, and right areas of the torso, significantly enhancing the sense of envelopment and three-dimensionality of the airflow.

[0022] (ii) Generating wind by mimicking natural wind Three fans are driven to output wind speeds that vary randomly at different times. This creates a natural-like dynamic airflow field at the subject's location, where wind speed and direction change randomly at different times, simulating the dynamic stimulation characteristics of natural wind.

[0023] As one implementation method, a home floor fan control device is built based on the Arduino IDE platform to achieve random fan speed control. Specifically, the fan control device includes a computer 1, a dedicated USB cable 2, a development board 3, male and female DuPont wires 4, a SCR module 5, a power cord 6, an AC power socket 7, a power strip 8, and a floor fan 9. The specific structural composition is as follows: Figure 3 As shown, the PWM signal controls the SCR module to adjust the mains input voltage (220V). Different voltage levels are output through the SCR module's output terminal, thereby controlling the fan speed.

[0024] Specifically, the Arduino IDE program is compiled and implemented on computer 1. The control program generates a PWM signal, and by adjusting the duty cycle, it controls the working state of the SCR module 5. The SCR module 5 "allows" 220V AC mains power according to this signal. A higher duty cycle means that the current is allowed to pass through for a longer time in each AC cycle, resulting in a higher average voltage and thus driving the fan to rotate faster. A lower duty cycle means that the current is allowed to pass through for a shorter time in each AC cycle, resulting in a lower average voltage and thus driving the fan to rotate slower. In the practical application of this embodiment, since the running code is pre-burned into the development board 3 built on the Arduino open-source platform, only the dedicated USB cable 2 is connected to the normal power supply during actual operation, simplifying the scene setup.

[0025] Three fans each supply a range of wind speeds that vary randomly over time (a set range of wind speeds with minor, irregular fluctuations over time), and the wind speed supplied by each fan is not exactly the same at any given moment. Within a certain time period, vector wind speeds from three different directions were collected. The mechanical fans were adjusted using PWM signals to ensure that, based on an equilateral triangle with sides of 1.5m, each fan outputs a mechanical wind with a frequency and value similar to the fluctuation of a segment of natural wind speed. A simulated natural dynamic airflow field with constantly changing wind speed and direction was created at the subject's location (the center of the triangle). Turbulence intensity (Tu), power spectral slope, and rate of change of wind speed (acceleration) were used to evaluate the characteristics of the simulated natural dynamic airflow field.

[0026] Specifically, in order to more realistically reproduce the randomness of natural wind, a random wind speed generation strategy based on fluid dynamics feature verification is proposed.

[0027] First, divide the wind speed into different levels. In the Arduino control program, preset three average wind speed gradient ranges. For example, set them as gentle (0.5-1.0 m / s), comfortable (1.0-1.5 m / s), and refreshing (1.5-2.0 m / s).

[0028] Then, dynamic variation constraints that meet thermal comfort standards are configured for each gradient interval. Specific constraint parameters include: turbulence intensity Tu∈(0.3, 0.5), double logarithmic power spectrum slope β>1.1, and instantaneous wind speed change rate (acceleration) threshold.

[0029] Among these, turbulence intensity, power spectrum slope, and wind speed change rate are the main hydrodynamic statistical properties of natural wind. Turbulence intensity describes the severity of wind speed fluctuations, power spectrum slope describes the distribution of wind speed energy at different frequencies, and wind speed change rate describes the degree of abrupt change in wind speed over time. By considering these hydrodynamic statistical properties, the random wind speed is ensured to be physically reasonable. Based on constraints, the generated random wind speed is not only statistically random but also possesses realistic hydrodynamic characteristics.

[0030] Multidimensional constraints are set for different wind speed settings. Each wind speed setting corresponds to a fluid dynamics characteristic parameter and its allowable range. For example, the turbulence intensity of the gentle setting is set to 0.25-0.4, the power spectrum slope is set to β>1.2, and the instantaneous rate of change is <0.5; the turbulence intensity of the comfortable setting is set to 0.3-0.50, the power spectrum slope is set to β>1.15, and the instantaneous rate of change is <0.6; and the turbulence intensity of the refreshing setting is set to 0.3-0.50, the power spectrum slope is set to β>1.1, and the instantaneous rate of change is <0.7.

[0031] In this embodiment, the introduction of turbulence intensity ensures that fluctuations remain within a comfortable range for the human body, avoiding excessive smoothness or turbulence; the introduction of a double logarithmic power spectrum slope to fit the turbulence distribution characteristics of natural wind avoids generating pseudo-random wind fields resembling white noise; and the introduction of instantaneous wind speed change rate limits sudden wind speed changes, preventing discomfort. These three elements together constitute dynamic constraints, ensuring that random wind speeds possess realistic fluid dynamic characteristics both statistically and physically.

[0032] Next, wind speed is dynamically generated based on constraints. An Arduino microcontroller uses its internal random function to generate a target PWM signal duty cycle sequence for a future time window (e.g., 5 seconds). Based on this sequence, turbulence intensity is extracted by calculating the ratio of standard deviation to mean using time-domain statistical methods. Power spectral density is estimated using Welch's method and other frequency-domain analysis techniques, and a double logarithmic curve is fitted to obtain the power spectral slope. Simultaneously, an approximate mapping relationship exists between the PWM signal duty cycle and the fan speed; the instantaneous wind speed change rate is calculated based on this mapping relationship.

[0033] If the calculation result meets the constraints of the current gear, the sequence is converted into a PWM signal to drive the output of the thyristor module; if it does not meet the constraints, a compensation mechanism is triggered to perform a second weighted correction on the sequence according to the difference direction until the target is met.

[0034] At the same time, the three fans on the front and rear sides are assigned a qualified random sequence with a certain phase difference (such as 0.5-1 seconds) to make the wind position angle of the synthetic airflow continuously and smoothly deflected, enhancing the feeling of being enveloped.

[0035] In this dynamic airflow field setup, the first fan is located directly behind the subject when they are seated; the second fan is located to the right front of the subject when they are seated; and the third fan is located to the left front of the subject when they are seated. The characteristics of the mechanical wind output from each fan were described by calculating the aforementioned evaluation indicators.

[0036] This embodiment is based on an equilateral triangle fan layout, combined with synchronous control of the output wind speed of each fan, so that the average wind speed of each fan is at a similar level but the instantaneous change trend is different, realizing non-periodic random fluctuation of wind speed and wind direction. It can form a synthetic airflow with wind direction and wind speed continuously changing over time in the area where the subject is located, effectively improving the dynamic realism of the simulated natural wind field.

[0037] (III) Aromatic diffusion By utilizing the constructed simulated natural dynamic airflow field, a natural-looking fragrance breeze is further created. Aromatherapy clips are placed at the fan outlet, allowing the fragrance to diffuse naturally with the airflow, enhancing environmental comfort. The fragrance diffusion rate is controlled by the fan's output speed.

[0038] Specifically, the coupling of aromatherapy and simulated natural wind is achieved by placing two aromatherapy clips at the same height as the air outlet of a floor fan. The clips are designed in fan blade form, and, without significantly affecting the airflow, each contains an aromatherapy core that has been soaked in the same volume of peppermint essential oil solution for the same amount of time, allowing the fragrance to diffuse with the airflow. Measurements showed that approximately 100.3 mg of peppermint aroma evaporates within a fixed 10-minute timeframe.

[0039] In one embodiment, the aromatherapy clip can also be replaced with an electronically controlled microporous atomizer or an adjustable temperature-controlled evaporation membrane.

[0040] The aroma control signal depends on the rate of change of wind speed. When an increase in wind speed is detected and the instantaneous rate of change in wind speed exceeds a set threshold, it is determined that a gust of wind will occur in the next second. The output power of the aromatherapy device is increased in advance for "pre-concentration," ensuring that the high-concentration aroma reaches the vicinity of the human body precisely on the gust of wind. Similarly, when a decrease in wind speed is detected and the absolute value of the instantaneous rate of change in wind speed exceeds the same threshold, the output power of the aromatherapy device is reduced in advance to prevent excessive accumulation of fragrance in low-speed airflow, which could lead to waste or olfactory fatigue. Preferably, the aromatherapy device is adjusted 0.5 seconds in advance.

[0041] Simultaneously, highly sensitive VOC odor concentration sensors were deployed in the subjects' activity areas. A comfort baseline for the aroma concentration (e.g., 0.5–1.5 mg / m²) was established. 3Using the Arduino's built-in PID algorithm, the collected values ​​are compared with the target baseline in real time, and the difference between the two is calculated. The PID algorithm outputs an adjustment value based on the proportion of the difference, which is used to dynamically fine-tune the gain coefficient of the feedforward controller, that is, the amplification factor of the wind speed change on the aroma release power. Specifically: when the actual concentration is lower than the baseline, the PID appropriately increases the gain coefficient to increase the release amount; when the actual concentration is higher than the baseline, the PID decreases the gain coefficient to reduce the release amount.

[0042] In addition, a concentration over-limit threshold and an olfactory fatigue lower limit are set to ensure that the fragrance concentration remains stable near the baseline in the long term and that olfactory fatigue or concentration over-limit will not occur during long-term operation, thus avoiding user perception failure or discomfort.

[0043] Regarding aroma diffusion, this embodiment does not operate the aroma device as an independent module, but rather couples it with a simulated natural airflow output. The aroma device is positioned at the fan outlet, allowing the aroma to diffuse naturally with the airflow, creating an immersive fragrance environment experience. Based on the constructed simulated natural dynamic airflow field and the aroma-simulated natural wind airflow field, the fan and aroma device work together to create a "simulated natural wind" environment, simulating the rhythm and aroma diffusion of natural wind, thus enhancing the user experience.

[0044] (iv) Infrared skin temperature detection and feedback adjustment Based on infrared thermal imaging equipment, the skin temperature of exposed areas such as the face, neck, and hands of the human body is collected in real time to obtain skin temperature parameters that reflect the thermal state of the human body, thereby enabling dynamic monitoring and timely control of the human body's thermal state.

[0045] The system sets a target skin temperature range (e.g., 32.5–33.5℃). When the skin temperature exceeds the upper threshold, the fan output speed is increased; when it falls below the lower threshold, the fan speed is decreased. While achieving automated control, it still maintains a basic fluctuation mode that mimics natural wind, realizing a composite output of "natural wind and intelligent control".

[0046] The system superimposes the control signal generated by skin temperature feedback with the random output sequence of natural wind, only adjusting the overall wind speed amplitude (synchronously increasing or decreasing the fan operating voltage), without changing the characteristics of natural wind fluctuation over time, making the overall wind field natural and realistic and possessing adaptive adjustment capabilities.

[0047] As one implementation method, a portable infrared thermal imaging device is used as an infrared skin temperature acquisition device, with a sampling frequency set to 15-30Hz, which can capture changes in human skin temperature in real time. Detection locations include: face (mainly the forehead, which is most sensitive to overall thermal conditions and is the main source of perceived thermal discomfort), neck (with high blood flow, temperature fluctuations can more clearly reflect body temperature regulation), and back of the hand (the extremities are more sensitive to hot and cold sensations and environmental stimuli).

[0048] After acquiring human skin temperature data, the target detection area is pre-selected in the temperature measurement screen; each selected area contains several pixels, and each pixel corresponds to an independent temperature value. The average temperature of all pixels within the selected area is calculated and used as the representative temperature of the corresponding area.

[0049] Next, heart rate variability (HRV) data is collected from the subjects. HRV data can be extracted using non-contact rPPG technology (which captures changes in the color of facial microvessels through an existing camera) or wearable devices.

[0050] Subsequently, the fan parameters were adjusted based on the subjects' skin temperature data and heart rate variability data: 1. Delayed adjustment (to avoid excessive cooling) When the detected skin temperature exceeds the upper limit threshold (e.g., 33.5℃), but the HRV parameters show that the sympathetic and parasympathetic nervous systems are in balance (the body is undergoing thermal adaptation and has not experienced significant heat stress), the command to increase the overall wind speed amplitude is temporarily suspended, and a preset observation period (2 minutes) is entered. If the HRV indicates an increase in heat stress after 2 minutes, the command to increase the wind speed amplitude by 20% is executed.

[0051] 2. Adjust the temperature in advance (to prevent feeling cold). When the skin temperature drops slightly and has not yet reached the lower threshold (32.5℃), but the HRV data clearly indicates that the body is showing signs of cold stress, the wind speed amplitude will be lowered in advance, and the system will then enter a lockout observation period to prevent the body from getting cold due to the natural lag in the skin temperature response.

[0052] All wind speed amplitude adjustments are achieved by changing the reference voltage (PWM base duty cycle) of the aforementioned "constrained random sequence" as a whole, strictly maintaining the original natural wind fluctuation rhythm and relative rate of change.

[0053] This embodiment achieves adaptive adjustment of the wind field by introducing environmental and human condition monitoring and control. It acquires changes in human skin temperature and HRV (Human Temperature Variable Rate), and uses a logical program to determine whether the subject is in a state of excessive or insufficient human heat load. When an increase in human heat load is detected based on changes in skin temperature and HRV, the overall wind speed amplitude is moderately increased without altering the original random wind speed trend; conversely, when a decrease in human heat load is detected based on changes in skin temperature and HRV, the overall wind speed amplitude is moderately decreased without altering the original random wind speed trend, thereby maintaining a consistently comfortable experience amidst dynamic environmental changes.

[0054] Through the above control method, this embodiment achieves wind speed amplitude regulation based on human body parameter feedback while maintaining the randomness and non-periodic characteristics of natural wind, avoiding excessive cooling or insufficient cooling, and keeping skin temperature stable for a long time. It overcomes the shortcomings of existing technologies such as fixed wind speed, poor adaptability, and decreased comfort with environmental changes, improves human thermal comfort, reduces fatigue, and improves cognitive performance.

[0055] This specific embodiment enhances human comfort through a three-pronged approach: random wind speed generation, aroma release coordination, and feedback of human physiological parameters. For random wind speed generation, a natural random wind speed sequence is generated by constraining wind speed gradient levels and verifying fluid dynamics characteristics. This, combined with asynchronous fan airflow, simulates the irregular and gently flowing characteristics of natural wind, avoiding the stuffy discomfort caused by constant direct airflow. Regarding aroma coordination, the gas release is adaptively adjusted based on real-time fan speed and environmental conditions, dynamically matching the aroma diffusion rhythm with the airflow field. This achieves uniform diffusion and a moderately soft concentration of scent, creating an immersive and comfortable olfactory atmosphere. In terms of human parameter feedback, real-time data on skin temperature and heart rate variability are collected, and the wind speed amplitude is dynamically adjusted in a closed loop. Based on physiological indicators, the system objectively perceives the human comfort state and actively adapts to changes in body temperature and nerve rhythms. The three aspects work together to achieve deep synergy between wind field changes, aroma diffusion, and human physiological states, significantly improving overall comfort and environmental adaptability.

[0056] To verify the effectiveness of this embodiment, the following experimental data are provided.

[0057] First, regarding the equilateral triangle fan layout, to verify whether the three fans can work normally, operating parameters were configured for the three fans based on the data in Tables 1, 2, and 3, respectively, and a simulated natural dynamic airflow field was constructed under 30℃ conditions: Table 1. Parameter settings for the first fan;

[0058] Table 2. Second fan parameter settings;

[0059] Table 3. Parameter settings for the third fan;

[0060] Regarding the results, firstly, when creating the corresponding vector wind speed, the wind speed power spectral index of the mechanical wind output by the three sub-fans all conforms to the description of natural wind in existing research results. Secondly, the turbulence intensity and wind speed power spectral index calculated from the simulated natural dynamic airflow field created by the three sub-fans also conform to the description of natural wind in existing research results. It should be understood that in actual experiments, the wind speed power spectral index characterizes the power spectral slope, and the two are physically equivalent.

[0061] like Figure 4 As shown, the experiment was conducted based on the following steps. Before the formal experiment began, the participants, with the assistance of the instructors, completed the wearing of the relevant experimental equipment and fully understood the experimental procedures and questionnaire completion requirements under explanation.

[0062] During the formal experiment, participants remained seated throughout, except when performing cognitive tasks. The experiment began with a 20-minute environmental adaptation phase to minimize the impact of initial environmental changes on physiological and psychological indicators. This was followed by a 10-minute quiet, unstimulated period during which skin temperature, heart rate, and heart rate variability were collected. After the quiet period, participants completed a subjective questionnaire, had their blood pressure measured, and underwent a cognitive task test; the collection of these parameters took approximately 10 minutes.

[0063] After data collection under calm conditions, a 10-minute wind-induced stimulation phase followed, during which skin temperature, heart rate, and heart rate variability were also collected. After the wind-induced stimulation phase, subjects completed a subjective questionnaire, blood pressure measurement, and cognitive task test following the same procedure, with parameter collection time also approximately 10 minutes. This process constitutes a complete wind-induced stimulation experiment.

[0064] Two different wind stimuli were used throughout the experiment, and each participant was ensured to receive both types of stimuli. The effects of simulated natural wind and aromatherapy-based simulated natural wind were compared by examining changes in relevant parameters.

[0065] like Figure 5 As shown, after sitting still, the average skin temperature of the subjects decreased whenever a fan or other warm airflow was present. However, coupling with peppermint aromatherapy did not enhance this phenomenon. It is speculated that the main mechanism of action of peppermint aromatherapy is to stimulate cold receptors in the trigeminal nerve, producing the illusion of a "cooling" sensation. It does not increase actual heat loss, but only enhances the subjective experience of coolness.

[0066] like Figure 6 As shown, the subjects voted on their thermal sensations during the experiment (e.g.) Figure 6 (a) and thermal comfort voting (e.g.) Figure 6 (b) Further analysis reveals that the aroma of peppermint plays a significant role in enhancing the subjective feeling of coolness. The scent of peppermint acts on the skin or nasal mucosa, generating a "cold" sensory signal that is transmitted to the brain. Even if the skin temperature does not actually decrease, the subjective feeling is still cooler. This is a neural regulation mechanism of "perceived cold" rather than "actual cold".

[0067] Furthermore, through a typing cognitive task, we explored the effects of two types of wind conditions—simulated natural wind and aromatherapy simulated natural wind—on the human body in a warm environment of 30°C.

[0068] Typing is a daily task for office workers, and typing tests can assess a subject's keyboard input speed, accuracy, and efficiency in processing text and data input.

[0069] To prevent participants from deliberately pursuing completion time or accuracy during the experiment, which could interfere with another indicator, a comprehensive performance indicator was introduced in the subsequent analysis in addition to completion time: Comprehensive performance = Cognitive test accuracy / Completion time.

[0070] like Figure 7 As shown, combining the aforementioned results with the reaction time presented by the cognitive task (e.g. Figure 7 (a)) and comprehensive performance indicators (such as Figure 7 (b) From this perspective, the natural fragrance not only has the most significant subjective cooling sensation (lowest thermal sensation score), but also the best cognitive performance (lowest reaction time, highest overall performance).

[0071] Considering the reasons for this phenomenon, in hot environments, the human body needs to expend a large amount of energy to maintain thermal balance, and some brain resources are allocated to heat stress regulation, thus affecting attention and reaction speed. Aromatherapy, mimicking natural wind, effectively reduces the heat load, releases brain resources, and is beneficial for improving executive function and reaction ability. At the same time, menthol (the main component of peppermint) can activate the prefrontal cortex and hippocampus of the brain through the olfactory pathway, enhancing attention regulation.

[0072] This specific embodiment comprehensively improves human comfort by integrating simulated natural wind generation, dynamic aroma diffusion, infrared skin temperature detection feedback, and automatic regulation, effectively reducing implementation costs while also considering the intelligent adjustment of personalized dynamic comfort environments indoors. It can provide new ideas and methods for optimizing indoor working environments for long-term indoor workers experiencing fatigue, heat discomfort, and other physical discomfort.

[0073] Example 2 This embodiment provides a fragrance-mimicking-natural-wind generation and control system based on multi-parameter coupling, including: The airflow field construction module is configured to construct a natural dynamic airflow field based on three fans equipped with aroma release devices; The natural wind generation module is configured to, given an initial random wind speed, correct it according to the preset wind speed gradient level and hydrodynamic characteristics, generate a random wind speed sequence, and drive each fan to deliver air at a preset time phase difference step. The aroma diffusion module is configured to control the amount of gas released by the aroma release device based on fan speed information and environmental feedback. The feedback control module is configured to collect the subject's skin temperature data and heart rate variability data, and adjust the wind speed amplitude accordingly.

[0074] This embodiment has a simple overall structure, requires no additional expensive special equipment, and can be built based on existing components, which greatly reduces deployment and modification investment and facilitates low-cost promotion and application in smart home scenarios.

[0075] Example 3 This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method for generating and controlling odor mimicking natural wind based on multi-parameter coupling as described in Embodiment 1 above.

[0076] Example 4 This embodiment provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps in the method for generating and controlling a fragrance mimicking natural wind based on multi-parameter coupling as described in Embodiment 1 above.

[0077] The steps or modules involved in Embodiments 2 to 4 above correspond to those in Embodiment 1. For specific implementation details, please refer to the relevant description section of Embodiment 1. The term "computer-readable storage medium" should be understood as a single medium or multiple media including one or more instruction sets; it should also be understood as including any medium capable of storing, encoding, or carrying an instruction set for execution by a processor and enabling the processor to perform any of the methods in this invention.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for generating and controlling an artificial breeze based on multi-parameter coupling, characterized in that, include: A natural dynamic airflow field is constructed based on three fans equipped with fragrance release devices; Given an initial random wind speed, the wind speed is corrected according to the preset wind speed gradient level and hydrodynamic characteristics, a random wind speed sequence is generated, and each fan is driven to deliver air at a preset time phase difference. The amount of gas released by the aroma release device is controlled based on fan speed information and environmental feedback. The subjects' skin temperature and heart rate variability data were collected to provide feedback for adjusting the wind speed amplitude.

2. The method for generating and controlling aromatic mimicking natural wind based on multi-parameter coupling as described in claim 1, characterized in that, The simulated natural dynamic airflow field uses three fans arranged in an equilateral triangle, with the subject located at the center of the equilateral triangle.

3. The method for generating and controlling aromatic mimicking natural wind based on multi-parameter coupling as described in claim 1, characterized in that, The process of correcting based on preset wind speed gradient levels and hydrodynamic characteristics, generating a random wind speed sequence, and driving each fan to deliver air at a preset time phase difference includes: Different wind speed gradient levels are set, and dynamic change constraints that conform to the statistical characteristics of fluid mechanics are set for each gradient level to constrain the physical rationality of random wind speed; the dynamic change constraints that conform to the statistical characteristics of fluid mechanics include the value ranges of turbulence intensity, power spectrum slope and instantaneous wind speed change rate. Based on a given initial random wind speed, calculate the turbulence intensity, power spectrum slope, and instantaneous wind speed change rate. Verify whether the constraint conditions for the corresponding gradient level are met. If they are met, generate a random wind speed sequence; otherwise, correct the random wind speed sequence based on the compensation mechanism. The random wind speed sequence is assigned to the three fans based on a preset time phase difference, driving the three fans to deliver air asynchronously.

4. The method for generating and controlling aromatic mimicking natural wind based on multi-parameter coupling as described in claim 3, characterized in that, The random wind speed sequence obtained by the compensation mechanism is specifically as follows: the sequence is weighted twice according to the direction of the difference until the constraint conditions are met, thus obtaining the random wind speed sequence.

5. The method for generating and controlling aromatic mimicking natural wind based on multi-parameter coupling as described in claim 1, characterized in that, The control of the gas release amount of the aroma release device based on fan speed information and environmental feedback specifically includes: If an increase in wind speed is detected and the instantaneous rate of change in wind speed exceeds a set threshold, the output power of the aromatherapy device will be increased in advance; if a decrease in wind speed is detected and the absolute value of the instantaneous rate of change in wind speed exceeds a set threshold, the output power of the aromatherapy device will be reduced in advance. The real-time fragrance concentration is obtained, and the difference between the fragrance concentration and the comfort baseline is calculated. An adjustment amount is generated based on the ratio of the difference. If the actual concentration is lower than the baseline, the output power gain coefficient of the fragrance device is increased to increase the release amount. If the actual concentration is higher than the baseline, the output power gain coefficient of the fragrance device is decreased to reduce the release amount.

6. The method for generating and controlling aromatic mimicking natural wind based on multi-parameter coupling as described in claim 1, characterized in that, The collection of skin temperature and heart rate variability data from the subjects, and the feedback adjustment of wind speed amplitude, specifically includes: When skin temperature data exceeds the upper limit threshold, but heart rate variability data shows that the sympathetic and parasympathetic nervous systems are in balance, the wind speed amplitude increase command is temporarily suspended, and a preset observation period is entered; if heart rate variability data indicates increased heat stress after the preset time, the wind speed amplitude increase command is executed. When a decrease in skin temperature is detected, but has not yet reached the lower limit threshold, but heart rate variability data indicates a trend of cold stress in the body, a wind speed amplitude reduction command is triggered in advance, and the system enters a lockout observation period.

7. A fragrance-mimicking natural wind generation and control system based on multi-parameter coupling, characterized in that, include: The airflow field construction module is configured to construct a natural dynamic airflow field based on three fans equipped with aroma release devices; The natural wind generation module is configured to, given an initial random wind speed, correct it according to the preset wind speed gradient level and hydrodynamic characteristics, generate a random wind speed sequence, and drive each fan to deliver air at a preset time phase difference step. The aroma diffusion module is configured to control the amount of gas released by the aroma release device based on fan speed information and environmental feedback. The feedback control module is configured to collect the subject's skin temperature data and heart rate variability data, and adjust the wind speed amplitude accordingly.

8. The aroma-simulating natural wind generation and control system based on multi-parameter coupling as described in claim 7, characterized in that, The fragrance release device is installed at the same height as the fan outlet.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps in the method for generating and controlling natural-looking fragrance based on multi-parameter coupling as described in any one of claims 1-6.

10. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the method for generating and controlling natural-sounding fragrance based on multi-parameter coupling as described in any one of claims 1-6.

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