Large-space laminar flow coupling rime fractal growth method and control system thereof

Abstract

The invention discloses a large-space laminar flow coupled rime fractal growth method and a control system thereof, and relates to the technical field of artificial environment control and landscape engineering crossing, and the method comprises the following specific steps: step 1, site planning and space construction; 2, equipment is installed, and the partition environment temperature is controlled through an environment control system constructed by a distributed MECU module; and 3, fog drops of 20-50 microns are generated through an atomizer and are directionally conveyed through an air supply system (Re = 200-500). According to the large-space laminar flow coupling rime fractal growth method and the control system thereof, four-dimensional parameter cooperative control (temperature / humidity / wind speed / fog drop particle size) is adopted, and the error value is reduced by 70% compared with that of a traditional method; phase change of fog drops is inhibited through a negative pressure compensation device (dynamic adjustment + / -50Pa) in a supercooled water drop stabilization technology, so that the liquid state holding time is longer than 8h (in a-10 DEG C environment); meanwhile, a partition refrigeration strategy is adopted in the double-layer film structure, the comprehensive energy consumption is smaller than 5.3 kW.h / m < 2 >, and electricity is saved by 52% compared with a traditional ice sculpture.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of artificial environment control and landscape engineering, in particular to a method for fractal growth of fog rime coupled with laminar flow in a large space and a control system thereof. BACKGROUND

[0002] Fog rime, commonly known as tree hanging, is a very rare natural wonder in the cold season, which is formed by the condensation of excessively saturated water vapor in the air. Fog rime is neither ice nor snow, but a result of the continuous accumulation and freezing of countless water vapor below zero degrees Celsius in the fog on objects such as tree branches. It appears as white opaque granular structure deposits. The formation of fog rime requires very low temperature and sufficient water vapor, and it is even more difficult to have both of these two extremely important and contradictory natural conditions.

[0003] Artifical fog rime landscape is a winter wonder created by simulating the formation conditions of natural fog rime through artificial technology, which is favored in tourism and festival activities. In the winter tourism off-season, many scenic spots attract tourists by creating artificial fog rime landscapes. For example, in some southern scenic spots, natural fog rime is difficult to see, and the appearance of artificial fog rime landscape allows tourists to enjoy the ice and snow wonder without long-distance travel to the north, enriching the tourism products of the scenic spot and enhancing the attraction and competitiveness of the scenic spot.

[0004] The current fog rime growth method still has the following defects:

[0005] (1) Dependence on nature: Traditional fog rime relies on the specific climate of Songhua River in winter (temperature ≤-15℃, humidity ≥85%), and cannot be controlled to generate all day long;

[0006] (2) Structural distortion: Existing ice and snow simulation technology (such as chemical crystallization method) can only generate granular ice crystals (porosity <30%), and cannot reproduce the feather-like fractal structure of natural fog rime (porosity 62%-75%, fractal dimension FDI≥0.89);

[0007] (3) Parameter mismatch: Patent CN201510023456.7 uses a single temperature control method, which does not coordinate the control of fog droplet size (20-50μm) and laminar flow speed (0.8-2.0m / s), resulting in a crystallization efficiency of less than 40%. SUMMARY

[0008] In view of the deficiencies of the prior art, the present application provides a method for fractal growth of fog rime coupled with laminar flow in a large space and a control system thereof, which solves the problems raised in the background art.

[0009] To achieve the above purpose, the present application realizes the following technical scheme: a method for fractal growth of fog rime coupled with laminar flow in a large space, comprising the following specific steps:

[0010] Step one: site planning and space construction;

[0011] Step two: equipment installation, including atomizer, air supply system, temperature and humidity control equipment, and target object installation operation, the environment control system constructed by distributed MECU module controls the temperature of the partition environment, wherein one group of MECU module is arranged every 200㎡, the vortex unit is driven through the distributed temperature sensing network (accuracy ±0.1℃), the temperature is reduced to the target value (-15±0.5℃) at a gradient of 0.5℃ / min, and the temperature is controlled to -15±0.5℃ and the humidity is controlled to 85±3% through the distributed MECU module;

[0012] Step three: 20-50μm fog droplets are generated by using an atomizer, and are directionally transported through an air supply system (Re=200-500);

[0013] Step four: during the fractal growth process of the fog, a high-definition camera is used to monitor the growth of the fog on the surface of the target object in real time, and whether the growth speed and morphological characteristics of the fog meet the fractal law are observed;

[0014] A function relationship between the fog growth rate and four parameters is established:

[0015] R=∫(T, RH, V, D drop )

[0016] Wherein:

[0017] R: fog growth rate (mm / h);

[0018] T: surface temperature (℃);

[0019] RH: relative humidity (%);

[0020] V: wind speed (m / s);

[0021] D drop : fog droplet size (μm);

[0022] Through the cooperative control of the temperature, humidity, wind speed and fog droplet size parameters, the growth environment is adjusted accordingly, and a diffusion-limited aggregation model (DLA) is also used, the crystal branch density is controlled by adjusting the voltage frequency (20-50kHz) to make FDI≥0.87;

[0023] Step five: post-maintenance and landscape maintenance, during the fog landscape display period, the fog-making system, air flow regulation equipment and temperature and humidity adjustment equipment are kept running, at the same time, the changes of the environmental parameters in the space are paid attention to, and it is ensured that the growth environment of the fog is always suitable.

[0024] Optionally, the site planning and space construction are specifically:

[0025] Select open, well-ventilated and easy to install and maintain equipment large space site, select double ETFE / PVDF film as building materials, its joint uses air tightness adhesive and negative pressure adsorption sealing;

[0026] Among them,

[0027] The light transmittance of ETFE / PVDF film is ≥92%, and the thermal conductivity is ≤0.22 W / m·K;

[0028] The air leakage rate of the joint is <0.05 m 3 / h·m 2 .

[0029] Optionally, the atomizer adopts a matrix ultrasonic atomizer, the droplet size is 20-50 μm, and the CV value is <15%.

[0030] Optionally, the air supply system adopts a ring laminar air supply system, the air speed is set to 0.8-2.0 m / s, and the turbulence degree is <5%.

[0031] Optionally, the ultrasonic atomizer switches the droplet size according to the real-time humidity (PID feedback), and the particle size switching is 50 μm→20 μm, and the airflow is optimized based on the Reynolds number formula;

[0032]

[0033] Among them, d is the droplet diameter, v is the wind speed, and the laminar flow region Re=200-500 is ensured.

[0034] Optionally, the temperature control and humidity adjusting device specifically includes a low-temperature scroll compressor and a humidifier, and the low-temperature scroll compressor has a refrigerating capacity of 120 kW and a COP≥3.2.

[0035] A large space laminar flow coupled fog fractal growth control system, comprising a data acquisition module, a central processing module and an environment control module;

[0036] The data acquisition module collects the temperature, humidity, wind speed, droplet size and operation parameters of each device in the fog growth environment, integrates and summarizes the data, and feeds back the data to the central processing module. Through the coordinated control of multiple parameters, adjustment suggestions are generated for the growth environment of the fog, and are sent to each environment control device in the environment control module.

[0037] Optionally, the data acquisition module provides decision basis for the control algorithm by monitoring the environmental and process parameters in real time and accurately, and ensures the dynamic balance of the four parameters of temperature, humidity, wind speed and droplet size;

[0038] Specifically as follows:

[0039] Temperature monitoring, measuring the temperature of the target surface and the surrounding air, to determine whether it reaches the critical low temperature for the formation of fog.

[0040] Humidity monitoring, detecting the relative humidity (RH) of the air, to ensure that the fog droplets do not evaporate during transport (RH needs to be > 90%);

[0041] Wind speed monitoring, real-time feedback of the fog droplet transport rate, to avoid too high wind speed causing fog droplet impact and breakage, or too low wind speed causing fog droplets not to reach the target surface;

[0042] Fog droplet size monitoring, online measurement of fog droplet size distribution by laser particle size analyzer, to ensure that the particle size is within the range of 20-50 μm;

[0043] The data acquisition module also includes abnormal state warning, detecting parameter mutation, triggering emergency strategy.

[0044] Among them, the data acquisition module adopts multi-point synchronous acquisition of temperature, humidity, wind speed and fog droplet size parameter values, and then uploads the data to the central processing module.

[0045] Optionally, the central processing module is configured to integrate and cooperatively decide four-dimensional data of temperature, humidity, wind speed and fog droplet size, to realize dynamic balance among parameters through multi-modal data fusion and dynamic control algorithm.

[0046] Specifically, it includes data preprocessing, feature extraction, and cooperative control strategy.

[0047] Data preprocessing, specifically as follows:

[0048] Time alignment, through timestamp synchronization (such as NTP protocol) to ensure that four-parameter data is sampled at the same time, to avoid control errors caused by acquisition delay;

[0049] Noise filtering, using sliding average filtering (temperature / humidity) or wavelet denoising (wind speed mutation signal) to eliminate outliers;

[0050] Feature extraction, specifically as follows:

[0051] Temperature gradient: the difference between surface temperature and ambient temperature (ΔT);

[0052] Fog droplet deposition efficiency: calculate the collision probability based on the inertia collision model, combining wind speed and fog droplet size;

[0053] Supercooling degree: calculate the supersaturation state of air according to temperature and humidity;

[0054] S = RH * eA ( T)

[0055] Cooperative control strategy, specifically as follows:

[0056] The received pre-processed four-dimensional data is defined as:

[0057] [T(t), RH(t), V(t), D(t)]

[0058] The deviation of the current parameters from the target values is calculated:

[0059] ΔT = T target -T(t)

[0060] At the same time, the four-parameter curve over time is drawn, and the control instruction trigger point is marked.

[0061] Optionally, the environment control module precisely links and controls the matrix ultrasonic atomizer, the annular laminar air supply equipment, the low-temperature scroll compressor and the humidifier according to the cooperative control instruction output by the central processing module; and implements the control strategy in order according to the priority among temperature, humidity, wind speed and fog droplet size.

[0062] The present application provides a large-space laminar flow coupled fog fractal growth method and its control system, which has the following beneficial effects:

[0063] The large-space laminar flow coupled fog fractal growth method and its control system adopt four-dimensional parameter cooperative control (temperature / humidity / wind speed / fog droplet size), and the error value is reduced by 70% compared with the traditional method; and the negative pressure compensation device (dynamic adjustment ± 50Pa) in the supercooled water droplet stabilization technology is used to suppress the phase change of the fog droplet, so that the liquid maintenance time is > 8h (-10℃ environment); at the same time, the partition refrigeration strategy is adopted in the double-layer membrane structure, and the comprehensive energy consumption is < 5.3kW·h / m 2 , which saves electricity by 52% compared with the traditional ice sculpture. BRIEF DESCRIPTION OF DRAWINGS

[0064] Figure 1 The flowchart of the first embodiment of the present application is shown. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0066] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0067] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] Embodiment one: please refer to Figure 1 , a large space laminar flow coupled fog fractal growth method and its control system, comprising the following specific steps:

[0069] Step one: site planning and space construction, select an open, well-ventilated and easy-to-install and maintain equipment in a large space site, select double-layer ETFE / PVDF film as the construction material, and use air-tight adhesive tape and negative pressure adsorption to seal the joints;

[0070] Among them,

[0071] The light transmittance of ETFE / PVDF film is greater than or equal to 92%, and the thermal conductivity is less than or equal to 0.22 W / m·K;

[0072] The air leakage rate at the joint is less than 0.05 m 3 / h·m 2 ;

[0073] Step two: equipment installation, including the arrangement and installation operation of atomizer, air supply system, temperature control and humidity adjustment equipment and target object, the environment control system constructed by the distributed MECU module controls the partition environment temperature, wherein one group of MECU module is arranged every 200㎡, the distributed temperature sensing network (precision ±0.1℃) drives the vortex unit, and the temperature is reduced to the target value (-15±0.5℃) at a gradient of 0.5℃ / min, and the temperature is controlled to -15±0.5℃ and the humidity is controlled to 85±3% by the distributed MECU module partition control;

[0074] The atomizer adopts a matrix ultrasonic atomizer, and the mist droplet size is 20-50 μm, and the CV value is less than 15%;

[0075] The ultrasonic atomizer switches the mist droplet size according to real-time humidity (PID feedback), and the size switching is specifically 50 μm→20 μm, and the airflow is optimized based on the Reynolds number formula;

[0076]

[0077] wherein d is the mist droplet diameter, and v is the wind speed, and the laminar flow region Re is ensured to be 200-500;

[0078] The air supply system adopts a ring laminar air supply system, and the wind speed is set to 0.8-2.0 m / s, and the turbulence degree is less than 5%;

[0079] The temperature control and humidity adjustment device specifically includes a low-temperature scroll compressor and a humidifier, and the low-temperature scroll compressor has a refrigerating capacity of 120 kW and a COP of greater than or equal to 3.2;

[0080] Step three: generating 20-50 μm mist droplets by using an atomizer, and directional delivery through an air supply system (Re=200-500);

[0081] Step four: during the process of the growth of the frost dendrites, a high-definition camera is used to monitor the growth of the frost dendrites on the surface of the target object in real time, and whether the growth speed and morphological characteristics of the frost dendrites conform to the fractal law is observed;

[0082] A function relationship between the growth rate of the frost dendrites and the four parameters is established:

[0083] R=∫(T,RH,V,D drop )

[0084] wherein:

[0085] R: the growth rate of the frost dendrites (mm / h);

[0086] T: the surface temperature (℃);

[0087] RH: the relative humidity (%);

[0088] V: the wind speed (m / s);

[0089] D drop : the mist droplet size (μm);

[0090] Through the synergistic control of the temperature, humidity, wind speed and mist droplet size parameters, the growth environment is adjusted accordingly, and a diffusion-limited aggregation model (DLA) is also used, the branch density of the crystal is controlled by adjusting the voltage frequency (20-50 kHz), and the FDI is greater than or equal to 0.87;

[0091] Step five: late maintenance and landscape maintenance, during the fog landscape exhibition, maintain the continuous operation of the fog system, airflow regulation equipment, temperature and humidity regulation equipment, at the same time, pay attention to the change of environmental parameters in the space, and ensure that it is always in the suitable environment for the growth of fog.

[0092] Embodiment two: large space laminar flow coupled fog fractal growth control system, comprising a data acquisition module, a central processing module and an environment regulation module;

[0093] The data acquisition module collects temperature, humidity, wind speed, fog droplet size and the operating parameters of each device in the fog growth environment, integrates and summarizes the data, and feeds back the data to the central processing module. Through the coordinated control of multiple parameters, adjustment suggestions are generated for the growth environment of fog, and sent to each environment control device in the environment regulation module.

[0094] The data acquisition module provides decision basis for the control algorithm by real-time and accurate monitoring of environmental and process parameters, ensuring the dynamic balance of temperature, humidity, wind speed and fog droplet size;

[0095] Specifically as follows:

[0096] Temperature monitoring, measuring the temperature of the target surface and the surrounding air, and determining whether the critical low temperature for fog growth is reached.

[0097] Humidity monitoring, detecting the relative humidity (RH) of the air to ensure that the fog droplets do not evaporate during transportation (RH needs to be > 90%);

[0098] Wind speed monitoring, real-time feedback of fog droplet transportation rate, to avoid high wind speed causing fog droplet impact and breakage or low wind speed causing fog droplets unable to reach the target surface;

[0099] Fog droplet size monitoring, online measurement of fog droplet size distribution by laser particle size analyzer to ensure that the particle size is within the range of 20-50 μm;

[0100] The data acquisition module also includes abnormal state early warning, detects parameter mutation, and triggers emergency strategy.

[0101] The data acquisition module adopts multi-point synchronous acquisition of temperature, humidity, wind speed and fog droplet size parameter values, and then uploads the data to the central processing module.

[0102] The central processing module is used for integrating and coordinating the four-dimensional data of temperature, humidity, wind speed and fog droplet size, and realizing the dynamic balance among parameters through multi-modal data fusion and dynamic control algorithm;

[0103] Specifically including data preprocessing, feature extraction, and coordinated control strategy;

[0104] Data preprocessing, specifically as follows:

[0105] Time alignment, ensure four-parameter data sampling at the same time by timestamp synchronization (such as NTP protocol), avoid control error caused by acquisition delay;

[0106] Noise filtering, using moving average filtering (temperature / humidity) or wavelet denoising (wind speed sudden signal), to eliminate outliers;

[0107] Feature extraction, as follows:

[0108] Temperature gradient: the difference between surface temperature and ambient temperature (ΔT).

[0109] Fog droplet deposition efficiency: calculate the collision probability based on the inertia collision model by combining wind speed and fog droplet size.

[0110] Supercooling degree: calculate the supersaturation state of air according to temperature and humidity;

[0111] S = RH * e A(T)

[0112] Cooperative control strategy, as follows:

[0113] Define the received preprocessed four-dimensional data as:

[0114] [T(t), RH(t), V(t), D(t)]

[0115] Calculate the deviation of current parameters and target value:

[0116] ΔT = T target -T(t)

[0117] At the same time, draw the curve of four parameters changing with time, mark the control instruction trigger point.

[0118] Environmental control module, according to the cooperative control instruction output by the central processing module, accurately link and control the matrix ultrasonic atomizer, annular laminar air supply equipment, low-temperature scroll compressor and humidifier; and according to the priority among temperature, humidity, wind speed and fog droplet size, implement the control strategy in order.

[0119] Test example: based on example one and example two, 1000㎡ indoor ski field fog generation

[0120] Equipment deployment:

[0121] Install 8 groups of MECU modules, covering a radius of 15m / group;

[0122] Parameter setting:

[0123] Start-up phase: reduce temperature to -15℃ at 0.5℃ / min, fog droplet size 50μm (humidity quickly rises to 80%)

[0124] Crystallization stage: Switch to 20 pm droplets, wind speed 1.2 m / s (Re = 380), for 8 h;

[0125] Effect verification (test report number WH-2023-001):

[0126] Crystal thickness: 5.2 ± 0.3 cm (natural Jilin rime control: 5.8 ± 0.5 cm);

[0127] Fractal dimension: FDI = 0.91 (laser scanning method, natural sample FDI = 0.93);

[0128] System energy consumption: 4.8 kW·h / m 2 (Traditional ice sculpture control: 10.2 kW·h / m 2 ).

[0129] Index Test Example Prior art (CN201510023456.7) Crystal fractal dimension FDI ≥0.87 ≤0.65 Crystallization rate (mm / h) 0.6～1.2 0.2～0.4 Energy consumption per unit area <5.3 kW-h / m 2 ]] > 10 kW-h / m 2 ]] Landscape maintenance time (h) ＞120(-10℃) ＜48(-10℃)

[0130] The above merely describes the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A large-space laminar flow coupled rime fractal growth method, characterized in that: The specific steps include: Step 1: Site planning and space construction; Step 2: Equipment installation, including the layout and installation of the atomizer, air supply system, temperature control and humidity control equipment, and target objects. The environmental control system built by the distributed MECU module controls the partitioned ambient temperature. One group of MECU modules is arranged for every 200 square meters. The distributed temperature sensing network drives the vortex unit to cool down to the target value at a gradient of 0.5°C / min. The distributed MECU module controls the temperature to -15±0.5°C and the humidity to 85±3% in each partition. Step 3: Use an atomizer to generate 20-50 μm droplets and deliver them in a direction through the air supply system; Step 4: Use a high-definition camera to monitor the growth of rime on the surface of the target object in real time during its fractal growth process, and observe whether the growth rate and morphological characteristics of the rime conform to the fractal law; Establish the functional relationship between the growth rate of rime and four parameters: R=∫(T, RH, V, D drop ) in: R: rime growth rate (mm / h); T: surface temperature (℃); RH: relative humidity (%); V: wind speed (m / s); D drop : droplet size (μm); Through the coordinated control of temperature, humidity, wind speed, and droplet size parameters, the growth environment is adjusted accordingly. A diffusion-limited aggregation model is also used to control the crystal branch density by adjusting the voltage frequency to make FDI ≥ 0.

87. Step 5: Post-maintenance and landscape preservation. During the display of the rime landscape, keep the fog-making system, airflow control equipment, and temperature and humidity control equipment in continuous operation. At the same time, pay attention to changes in environmental parameters in the space to ensure that it is always in an environment suitable for the growth of rime.

2. The large-space laminar flow coupled rime fractal growth method according to claim 1, characterized in that: The site planning and space construction are specifically as follows: Choose a large, open, well-ventilated space that is convenient for equipment installation and maintenance. Use double-layer ETFE / PVDF membrane as the construction material, and use airtight tape and negative pressure adsorption to seal the seams. in, The light transmittance of ETFE / PVDF film is ≥92%, and the thermal conductivity is ≤0.22W / m·K; Air leakage rate at the joints <0.05m 3 / h·m 2 .

3. The large-space laminar flow coupled rime fractal growth method according to claim 1, characterized in that: The atomizer adopts a matrix ultrasonic atomizer, the droplet diameter is 20-50 μm, and the CV value is less than 15%.

4. The large-space laminar flow coupled rime fractal growth method according to claim 1, characterized in that: The air supply system adopts an annular laminar air supply system, the wind speed of which is set to 0.8-2.0 m / s and the turbulence degree is less than 5%.

5. The large-space laminar flow coupled rime fractal growth method according to claim 1, characterized in that: The ultrasonic atomizer switches the droplet size according to the real-time humidity, and the particle size switching is specifically 50μm→20μm, while optimizing the airflow based on the Reynolds number formula; Where d is the droplet diameter and v is the wind speed, ensuring that the laminar flow zone Re = 200 ~ 500.

6. The large-space laminar flow coupled rime fractal growth method according to claim 1, characterized in that: The temperature control and humidity adjustment equipment specifically includes a low-temperature scroll compressor and a humidifier. The low-temperature scroll compressor has a cooling capacity of 120kW and a COP ≥ 3.

2.

7. A large-space laminar flow coupled rime fractal growth control system for use in any one of claims 1 to 6, characterized in that: Including data acquisition module, central processing module and environmental control module; The data acquisition module is used to collect the temperature, humidity, wind speed, droplet size and operating parameters of each device in the growth environment of rime, integrate and summarize the data, and feed the data back to the central processing module. Through the coordinated control of multiple parameters, adjustment suggestions are generated for the growth environment of rime and sent to the various environmental control devices in the environmental control module.

8. The large-space laminar flow coupled rime fractal growth control system according to claim 7, characterized in that: The data acquisition module provides a decision basis for the control algorithm by real-time and accurate monitoring of environmental and process parameters, ensuring the dynamic balance of the four parameters of temperature, humidity, wind speed and droplet size; The details are as follows: Temperature monitoring measures the temperature of the target surface and surrounding air to determine whether the critical low temperature for rime growth has been reached. Humidity monitoring: detects the relative humidity of the air to ensure that the droplets do not evaporate during transportation; Wind speed monitoring provides real-time feedback on droplet delivery rate to prevent droplets from impacting and breaking due to excessive wind speed or from failing to reach the target surface due to excessive wind speed; Droplet size monitoring: using a laser particle size analyzer to measure the droplet size distribution online to ensure that the particle size is within the range of 20-50μm; The data acquisition module also includes abnormal state warning, detection of parameter mutations, and triggering of emergency strategies. Among them, the data acquisition module uses multiple points to synchronously collect parameter values ​​of temperature, humidity, wind speed and droplet size, and then uploads the data to the central processing module.

9. The large-space laminar flow coupled rime fractal growth control system according to claim 7, characterized in that: The central processing module is used to integrate and coordinate decision-making of the four-dimensional data of temperature, humidity, wind speed, and droplet size, and achieve dynamic balance between parameters through multimodal data fusion and dynamic control algorithms; Specifically including data preprocessing, feature extraction, and collaborative control strategy; Data preprocessing is as follows: Time alignment: ensures that the four parameter data are sampled at the same time through timestamp synchronization, avoiding control errors caused by acquisition delays; Noise filtering, using sliding average filtering or wavelet denoising to remove outliers; Feature extraction, specifically as follows: Temperature gradient: the difference between the surface temperature and the ambient temperature (ΔT); Droplet settling efficiency: Calculate the collision probability by combining wind speed and droplet size; Subcooling: Calculate the supersaturation state of air based on temperature and humidity; S=RH*e A(T) The collaborative control strategy is as follows: The received pre-processed four-dimensional data is defined as: [T(t,RH(t),V(t),D(t)] Calculate the deviation between the current parameter and the target value: ΔT=T target -T(t) At the same time, the curves of the four parameters changing with time are drawn and the control instruction trigger points are marked.

10. The large-space laminar flow coupled rime fractal growth control system according to claim 7, characterized in that: The environmental control module precisely controls the matrix ultrasonic atomizer, annular laminar air supply equipment, low-temperature scroll compressor and humidifier according to the coordinated control instructions output by the central processing module; and implements the control strategy in sequence according to the priority between temperature, humidity, wind speed and droplet particle size.

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