A device and method for dynamically measuring heterogeneous condensation of a single particle in a suspended state

Abstract

The invention discloses a device and method for dynamically measuring heterogeneous condensation of a single particle in a suspended state, which relates to the field of micro-nano particle monitoring technology, and includes: an environmental chamber for generating a supersaturated steam environment; an aerosol particle generating assembly for generating an aerosol particle airflow and conveying the aerosol particle airflow to the environmental chamber; a first laser emitting assembly for emitting a first laser to the environmental chamber; a second laser emitting assembly for emitting a second laser to the environmental chamber; a particle heterogeneous condensation observation component for observing the particle size of aerosol particles in the environmental chamber at different times; a moving rate calculation component for calculating the heterogeneous condensation growth rate of aerosol particles according to multiple particle sizes; when working, the first laser and the second laser converge in the environmental chamber to generate a light trap, which captures aerosol particles and drives the aerosol particles to move in the environmental chamber, and the aerosol particles condense and grow during the movement. Accurate calculation of the heterogeneous condensation growth rate of particles when they move is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of micro-nano particle monitoring, and in particular to a device and method for dynamically measuring heterogeneous condensation of a single particle in a suspended state. Background Art

[0002] Heterogeneous particle condensation is a common phenomenon in nature (e.g., rainfall and snowfall) and in industrial production (e.g., dust removal). Whether in nature or in industrial practice, heterogeneous particle condensation occurs while particles are suspended, without contact with any surface. Furthermore, the theoretical model for heterogeneous particle condensation is based on suspended particles. Water vapor surrounding the particles diffuses toward the particle surface under the influence of vapor pressure, and water vapor near the particle surface condenses there.

[0003] The traditional method for measuring the condensation rate of a single-particle heterogeneous condensation process is to place the particle on a substrate of a certain material and observe its condensation rate using a microscope in a supersaturated water vapor environment chamber. However, since the particle to be measured is in direct contact with the substrate at this time, the surface properties of the substrate will have a significant impact on the condensation location and condensation rate, resulting in significant differences from the particle heterogeneous condensation model in actual industrial applications. In addition, particles in real industry are all suspended in the airflow, and the theoretical model of particle heterogeneous condensation dynamics is also established based on the dynamic movement of suspended particles. Therefore, the traditional method of measuring the particle condensation growth rate is inconsistent with both reality and theoretical models. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for dynamically measuring heterogeneous coagulation of a single particle in a suspended state, which can accurately calculate the heterogeneous coagulation growth rate of the particle when it moves in a suspended state.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a device for dynamically measuring heterogeneous coagulation of a single particle in a suspended state, comprising:

[0007] Environmental chamber, used to generate supersaturated steam environment;

[0008] an aerosol particle generating assembly, in communication with the environmental chamber, for generating an aerosol particle airflow and conveying the aerosol particle airflow to the environmental chamber; the aerosol particle airflow comprises a plurality of aerosol particles;

[0009] A first laser emitting assembly, configured to emit a first laser toward the environmental chamber;

[0010] A second laser emitting assembly, configured to emit a second laser toward the environmental chamber;

[0011] A particle heterogeneous condensation observation component is used to observe the particle sizes of the aerosol particles at different times in the environmental chamber;

[0012] a movement rate calculation component, configured to calculate the heterogeneous condensation growth rate of the aerosol particles according to the plurality of particle sizes;

[0013] During operation, the first laser and the second laser converge in the environmental chamber to generate a light trap, which captures the aerosol particles and drives the aerosol particles to move in the environmental chamber. The aerosol particles condense and grow during the movement.

[0014] Optionally, the first laser emitting assembly includes a first laser controller, a first laser, a first plane reflector, a first movable convex lens and a first displacement controller;

[0015] The first laser controller is connected to the first laser, and is used to control the first laser to generate a first laser;

[0016] The first laser, the first plane reflector, and the first movable convex lens are arranged in sequence so that the first laser passes through the first plane reflector and the first movable convex lens in sequence and then enters the environmental chamber;

[0017] The first displacement controller is connected to the first plane reflector and the first movable convex lens respectively, and is used to control the movement of the first plane reflector and the first movable convex lens so that the light trap formed by the first laser and the second laser captures the aerosol particles and drives them to move in the environmental chamber;

[0018] The first laser controller is further configured to adjust the laser power of the first laser when the aerosol particles move in the environmental chamber, so that the aerosol particles remain captured by the light trap.

[0019] Optionally, the aerosol particle generating assembly includes an aerosol generator and a particle delivery conduit;

[0020] The aerosol generator is used to generate an aerosol particle airflow composed of aerosol particles with a single component and the same initial particle size;

[0021] One end of the particle delivery pipe is connected to the aerosol generator, and the other end of the particle delivery pipe is connected to the environmental chamber. The particle delivery pipe is used to deliver the aerosol particle airflow into the environmental chamber.

[0022] Optionally, the device further comprises:

[0023] A temperature-controlled water bath is connected to the environmental chamber and is used to adjust the temperature in the environmental chamber.

[0024] Optionally, the device further comprises:

[0025] The humidity controller is arranged in the environmental chamber and is used to detect humidity data in the environmental chamber and increase or decrease the humidity in the environmental chamber according to the humidity data.

[0026] Optionally, the second laser emitting assembly includes a second laser controller, a second laser, a second plane reflector, a second movable convex lens and a second displacement controller;

[0027] The second laser controller is connected to the second laser, and the second laser controller is used to control the second laser to generate a second laser;

[0028] The second laser, the second plane reflector, and the second movable convex lens are arranged in sequence so that the second laser passes through the second plane reflector and the second movable convex lens in sequence and is incident on the environmental chamber;

[0029] The second displacement controller is connected to the second plane reflector and the second movable convex lens respectively, and is used to control the movement of the second plane reflector and the second movable convex lens so that the light trap formed by the second laser and the first laser captures the aerosol particles and drives them to move in the environmental chamber;

[0030] The second laser controller is further configured to adjust the laser power of the second laser when the aerosol particles move in the environmental chamber, so that the aerosol particles remain captured by the light trap.

[0031] Optionally, the particle heterogeneous condensation observation component is an optical microscope.

[0032] To achieve the above-mentioned object, the present invention further provides a method for dynamically measuring heterogeneous coagulation of a single particle in a suspended state, which is applied to a device for dynamically measuring heterogeneous coagulation of a single particle in a suspended state, comprising:

[0033] A saturated steam environment is formed in the environmental chamber;

[0034] generating an aerosol particle airflow through an aerosol particle generating assembly, and delivering the aerosol particle airflow to the environmental chamber; the aerosol particle airflow includes a plurality of aerosol particles;

[0035] A first laser is emitted toward the environmental chamber by a first laser emitting assembly, and a second laser is emitted toward the environmental chamber by a second laser emitting assembly, so that the first laser and the second laser converge in the environmental chamber and generate a light trap; the light trap captures the aerosol particles and then drives the aerosol particles to move within the environmental chamber, and the aerosol particles condense and grow during the movement;

[0036] Observing the particle sizes of the aerosol particles at different times in the environmental chamber through a particle heterogeneous condensation observation component;

[0037] The heterogeneous condensation growth rate of the aerosol particles is calculated according to the plurality of particle sizes by a movement rate calculation component.

[0038] Optionally, the method further includes:

[0039] When the aerosol particles move in the environmental chamber, the laser power of the first laser is adjusted by the first laser controller in the first laser emitting assembly, and the laser power of the second laser is adjusted by the second laser controller in the second laser emitting assembly, so that the light trap generated by the convergence of the first laser after power adjustment and the second laser after power adjustment can still capture the aerosol particles, so that the aerosol particles remain captured by the light trap in the environmental chamber.

[0040] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0041] The present invention provides a device and method for dynamically measuring the heterogeneous condensation of a single particle in a suspended state, wherein a supersaturated steam environment is generated in an environmental chamber; an aerosol particle airflow is generated by an aerosol particle generating assembly and transported to the environmental chamber; a first laser emitting assembly is used to emit a first laser into the environmental chamber, and a second laser emitting assembly is used to emit a second laser into the environmental chamber; since the first laser and the second laser converge in the environmental chamber to generate a light trap, the light trap can capture aerosol particles, so that the particles are in a suspended state in the environmental chamber, overcoming the influence of the substrate surface characteristics on the condensation rate when the particles are directly placed on the substrate in the traditional method. Furthermore, the light trap drives the aerosol particles to move in the environmental chamber. The aerosol particles condense and grow during the movement, and their particle size continues to increase. The particle heterogeneous condensation observation component observes the particle size of the aerosol particles at different times, and the movement rate calculation component calculates the heterogeneous condensation growth rate of the aerosol particles based on multiple particle sizes, thereby realizing the accurate calculation and measurement of the dynamic growth rate of the aerosol particles, overcoming the defect that the traditional method is difficult to control the particle movement speed, making the measurement of aerosol particles more in line with reality and theory, and having a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 Schematic diagram of the structure of the device for dynamically measuring heterogeneous coagulation of a single particle in a suspended state according to the present invention;

[0044] Figure 2 Schematic diagram of the process of the method for dynamically measuring heterogeneous coagulation of a single particle in a suspended state according to the present invention.

[0045] Explanation of symbols:

[0046] 101-aerosol generator, 201-particle transport pipeline, 301-environmental chamber, 401-aerosol particles, 501-first laser controller, 502-second laser controller, 601-first laser, 602-second laser, 701-first plane reflector, 702-second plane reflector, 801-first movable convex lens, 802-second movable convex lens, 901-first displacement controller, 902-second displacement controller, 1001-optical microscope, 1002-temperature-controlled water bath, 1003-humidity controller. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] The present invention proposes a device and method for dynamically measuring the heterogeneous coagulation of single particles in a suspended state. An optical tweezers system is used to create a light trap of a certain intensity in an environmental chamber, so that the particles move in the environmental chamber and are eventually captured by the light trap. The dynamic heterogeneous coagulation process is calculated based on the movement time and particle size change, avoiding the influence of the substrate material on the particle coagulation rate in traditional methods. The measured dynamic coagulation process is consistent with industrial application requirements, which greatly improves the research ideas on particle heterogeneous coagulation.

[0049] In order to make the objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Example 1

[0051] like Figure 1 As shown, this embodiment provides a device for dynamically measuring heterogeneous condensation of a single particle in a suspended state, including an environmental chamber 301, an aerosol particle generating component, a first laser emitting component, a second laser emitting component, a particle heterogeneous condensation observing component, and a movement rate calculating component.

[0052] Specifically, the environmental chamber 301 is used to generate a supersaturated steam environment.

[0053] An aerosol particle generating assembly is in communication with the environmental chamber 301 and is configured to generate an aerosol particle airflow and deliver the aerosol particle airflow to the environmental chamber 301. The aerosol particle airflow includes a plurality of aerosol particles, each of which is a single component, and the aerosol particles in the same aerosol particle airflow have the same component. Furthermore, the aerosol particles are micro-nano sized particles.

[0054] Preferably, the aerosol particle generating assembly includes an aerosol generator 101 and a particle delivery pipe 201; the aerosol generator 101 is used to generate an aerosol particle airflow composed of aerosol particles of a single component and having the same initial particle size; one end of the particle delivery pipe 201 is connected to the aerosol generator 101, and the other end of the particle delivery pipe 201 is connected to the environmental chamber 301, and the particle delivery pipe 201 is used to deliver the aerosol particle airflow into the environmental chamber 301. In addition, the particle delivery pipe 201 is a pipe that prevents particle adhesion.

[0055] The first laser emitting assembly is used to emit a first laser toward the environmental chamber; the first laser emitting assembly includes a first laser controller 501 , a first laser 601 , a first plane reflector 701 , a first movable convex lens 801 and a first displacement controller 901 .

[0056] The first laser controller 501 is connected to the first laser 601 and is used to control the first laser 601 to generate a first laser. The first laser has a specific wavelength and power, and the specific wavelength and power of the first laser are set by the staff according to needs.

[0057] The first laser 601 , the first plane reflector 701 and the first movable convex lens 801 are arranged in sequence, so that the first laser passes through the first plane reflector 701 and the first movable convex lens 801 in sequence and then enters the environmental chamber 301 .

[0058] The first displacement controller 901 is connected to the first plane reflector 701 and the first movable convex lens 801 respectively. The first displacement controller 901 is used to control the movement of the first plane reflector 701 and the first movable convex lens 801 so that the light trap formed by the first laser and the second laser captures and drives the aerosol particles to move in the environmental chamber 301.

[0059] Specifically, the first plane reflector 701 is used to adjust the laser direction of the first laser so that the first laser enters the first movable convex lens 801. The first movable convex lens 801 is used to converge the first laser after being adjusted by the first plane reflector 701 and emit it to the entrance of the environmental chamber 301. At the entrance of the environmental chamber 301, it converges with the second laser to produce a light trap of a certain intensity. The first plane reflector 701 is a controllable and precisely movable plane reflector, and the first movable convex lens 801 is a controllable and precisely movable convex lens.

[0060] The first laser controller 501 is further configured to adjust the laser power of the first laser when the aerosol particles move in the environmental chamber 301 , so that the aerosol particles remain captured by the light trap.

[0061] The second laser emitting assembly is used to emit a second laser toward the environmental chamber; the second laser emitting assembly includes a second laser controller 502 , a second laser 602 , a second plane reflector 702 , a second movable convex lens 802 and a second displacement controller 902 .

[0062] The second laser controller 502 is connected to the second laser 602 and is used to control the second laser 602 to generate a second laser. The second laser has a specific wavelength and power, and the specific wavelength and power of the second laser are set by the staff according to needs.

[0063] The second laser 602 , the second plane reflector 702 and the second movable convex lens 802 are arranged in sequence so that the second laser passes through the second plane reflector 702 and the second movable convex lens 802 in sequence and then enters the environmental chamber.

[0064] The second displacement controller 902 is connected to the second plane reflector 702 and the second movable convex lens 802 respectively. The second displacement controller 902 is used to control the movement of the second plane reflector 702 and the second movable convex lens 802 so that the light trap formed by the second laser and the first laser captures and drives the aerosol particles to move in the environmental chamber 301.

[0065] Specifically, the working principles of the second plane reflector 702 and the second movable convex lens 802 are the same as those of the first plane reflector 701 and the first movable convex lens 801, and are not further described herein. The second plane reflector 702 is a controllable and precisely movable plane reflector, and the second movable convex lens 802 is a controllable and precisely movable convex lens.

[0066] The second laser controller 502 is further configured to adjust the laser power of the second laser when the aerosol particles move in the environmental chamber 301 , so that the aerosol particles remain captured by the light trap.

[0067] The particle heterogeneous condensation observation component is used to observe the particle sizes of the aerosol particles in the environmental chamber at different times; the particle heterogeneous condensation observation component is an optical microscope 1001.

[0068] The movement rate calculation component is used to calculate the heterogeneous condensation growth rate of the aerosol particles according to the plurality of particle sizes. Specifically, the movement rate calculation component can be a processor that realizes the heterogeneous condensation growth rate calculation by running a computer program.

[0069] In a specific embodiment, the device also includes a temperature-controlled water bath 1002 and a humidity controller 1003; the temperature-controlled water bath 1002 is connected to the environmental chamber, and the temperature-controlled water bath 1002 is used to adjust the temperature in the environmental chamber; specifically, the temperature-controlled water bath 1002 is a high-precision temperature-controlled water bath.

[0070] The humidity controller 1003 is disposed in the environmental chamber. The humidity controller 1003 is used to detect humidity data in the environmental chamber and increase or decrease the humidity in the environmental chamber according to the humidity data.

[0071] The specific process of the device of this embodiment in actual application is as follows:

[0072] First, it should be understood that the principle of optical tweezers technology is that two laser beams converge to form a light trap. Dust particles entering the area near the light trap are trapped by the optical pressure. Then, the laser beams are moved to achieve directional, non-contact movement of the dust particles. Based on this, the first and second laser emitting assemblies respectively control the movement direction and speed of the two laser beams, so that they converge in the environmental chamber to form a light trap, which captures aerosol particles in the environmental chamber 301. Then, the positions of the first plane reflector 701 and the first movable convex lens 801 are controlled by the first displacement controller 901, and the positions of the second plane reflector 702 and the second movable convex lens 802 are controlled by the second displacement controller 902, so that the light trap moves toward the exit at a certain speed. During this movement, the aerosol particles heterogeneously condense in the high-humidity environmental chamber to form dust droplets. At the same time, the power of the first laser is adjusted by the first laser controller 501, and the power of the second laser is adjusted by the second laser controller 502, to ensure that the dust droplets continue to move steadily at a certain speed in the environmental chamber 301 where the temperature and humidity are controlled. Finally, an optical microscope 1001 is used to observe the particle size of aerosol particles after condensation and growth, and then the heterogeneous condensation rate of particles during movement in the environmental chamber is calculated.

[0073] Example 2

[0074] like Figure 2 As shown, this embodiment provides a method for dynamically measuring heterogeneous coagulation of a single particle in a suspended state, which is applied to the device for dynamically measuring heterogeneous coagulation of a single particle in a suspended state in Example 1. The method includes:

[0075] Step 100: Create a saturated steam environment in the environmental chamber. Specifically, a temperature-controlled water bath adjusts the temperature in the environmental chamber, and a humidity controller adjusts the humidity in the environmental chamber, thereby creating a supersaturated steam environment at a set temperature and set humidity (generally, lower temperature and higher humidity).

[0076] In step 200, an aerosol particle generating assembly generates an aerosol particle airflow, and the aerosol particle airflow is delivered to the environmental chamber; the aerosol particle airflow includes a plurality of aerosol particles. Specifically, a certain flow concentration is set to ensure smooth flow of the aerosol particle airflow.

[0077] Step 300: A first laser is emitted toward the environmental chamber through a first laser emission assembly, and a second laser is emitted toward the environmental chamber through a second laser emission assembly, so that the first laser and the second laser converge in the environmental chamber and generate a light trap; the light trap captures the aerosol particles, and then drives the aerosol particles to move in the environmental chamber, and the aerosol particles condense and grow during the movement.

[0078] Specifically, a first laser, controlled by a first laser controller, generates a first laser beam with a specific wavelength and power. This beam passes through a first plane reflector and a first movable convex lens before reaching the environmental chamber. A second laser, controlled by a second laser controller, generates a second laser beam with a specific wavelength and power. This beam also passes through a second plane reflector and a second movable convex lens before reaching the environmental chamber. The first and second laser beams converge at the entrance of the environmental chamber to create a light trap of a specific intensity, capturing and immobilizing individual aerosol particles.

[0079] The first plane reflector and the first movable convex lens move at a certain speed and direction under the control of the first displacement controller, and the second plane reflector and the second movable convex lens move at a certain speed and direction under the control of the second displacement controller, so that the light trap generated by the first laser and the second laser moves at a certain speed and direction, thereby causing the dust particles (single aerosol particles) to move at a certain speed and direction.

[0080] During the movement, due to the supersaturated steam environment and controllable humidity and temperature, the condensation and heterogeneous condensation growth process of the aerosol particles is realized. Since the particle size of the aerosol particles continues to increase during the condensation and growth process, the laser controller needs to make corresponding adjustments to change the laser power to ensure that the dust droplets continue to move smoothly in the environmental chamber. Specifically, when the aerosol particles move in the environmental chamber, the laser power of the first laser is adjusted by the first laser controller in the first laser emitting assembly, and the laser power of the second laser is adjusted by the second laser controller in the second laser emitting assembly, so that the light trap generated by the convergence of the first laser after power adjustment and the second laser after power adjustment can still capture the aerosol particles, so that the aerosol particles remain captured by the light trap in the environmental chamber, that is, to ensure that the aerosol particles continue to move smoothly in the environmental chamber.

[0081] Step 400: observe the particle sizes of the aerosol particles at different times in the environmental chamber using a particle heterogeneous condensation observation component. Specifically, an optical microscope is used to observe the particle sizes of the aerosol particles at the end of movement (the position of the aerosol particles at the end of condensation growth).

[0082] Step 500: The heterogeneous condensation growth rate of the aerosol particles is calculated based on the multiple particle sizes using a movement rate calculation component. Specifically, the average velocity of the condensation growth process is calculated based on the displacement and time of the aerosol particles under optical tweezers control. The amount of phase-transition water vapor during the droplet condensation growth process is calculated based on the particle size changes at the beginning and end of the movement. The heterogeneous condensation growth rate of the aerosol particles during the movement process is calculated based on the phase-transition water vapor amount and the average velocity of the condensation growth process.

[0083] Finally, in practical applications, it is also possible to obtain the influence of the above parameters on the heterogeneous condensation growth rate of aerosol particles during dynamic movement by changing the original size of the aerosol particles generated by the aerosol generator, changing the displacement time of the first plane reflector and the first movable convex lens controlled based on the optical tweezers principle, and changing the temperature and humidity conditions in the environmental chamber, so as to facilitate further application in actual industry.

[0084] Compared with the prior art, the present invention also has the following advantages:

[0085] Based on the principles of optical tweezers, the present invention uses two laser beams to converge and create a light trap. When a single particle of a specific size passes near the light trap within an environmental chamber with a carrier fluid, it is trapped by the light pressure, thereby converting the particle's motion to a stationary state and suspending it within the chamber at a constant temperature and humidity. A microscope is then used to observe the changes in the suspended particle's size over a distance within the chamber. Finally, a microscope is used to compare the initial and final suspended states of the aerosol particles, accurately calculating the heterogeneous condensation rate of the single particle.

[0086] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0087] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A device for measuring the dynamics of heterogeneous coagulation of a single particle in suspension, characterized in that: The device comprises: Environmental chamber, used to generate supersaturated steam environment; an aerosol particle generating assembly, which is in communication with the environmental chamber and is used to generate an aerosol particle airflow and transport the aerosol particle airflow to the environmental chamber; the aerosol particle airflow includes a plurality of aerosol particles; A first laser emitting assembly, used for emitting a first laser toward the environmental chamber; A second laser emitting assembly, used for emitting a second laser toward the environmental chamber; The first laser emitting assembly includes a first laser controller, a first laser, a first plane reflector, a first movable convex lens and a first displacement controller; the first laser controller is connected to the first laser, and the first laser controller is used to control the first laser to generate a first laser; the first laser, the first plane reflector and the first movable convex lens are arranged in sequence, so that the first laser is incident on the environmental chamber after passing through the first plane reflector and the first movable convex lens in sequence; the first displacement controller is connected to the first plane reflector and the first movable convex lens respectively, and the first displacement controller is used to control the movement of the first plane reflector and the first movable convex lens, so that the light trap formed by the first laser and the second laser captures and drives the aerosol particles to move in the environmental chamber; the first laser controller is also used to adjust the laser power of the first laser when the aerosol particles move in the environmental chamber, so that the aerosol particles remain captured by the light trap; A particle heterogeneous condensation observation component is used to observe the particle sizes of the aerosol particles at different times in the environmental chamber; A moving rate calculation component, used for calculating the heterogeneous condensation growth rate of the aerosol particles according to the plurality of particle sizes; During operation, the first laser and the second laser converge in the environmental chamber to generate a light trap, which captures the aerosol particles and drives the aerosol particles to move in the environmental chamber. The aerosol particles condense and grow during the movement.

2. The device for measuring dynamic heterogeneous coagulation of a single particle in suspension according to claim 1, characterized in that: The aerosol particle generating assembly includes an aerosol generator and a particle delivery pipeline; The aerosol generator is used to generate an aerosol particle airflow consisting of aerosol particles with a single component and the same initial particle size; One end of the particle delivery pipeline is connected to the aerosol generator, and the other end of the particle delivery pipeline is connected to the environmental chamber. The particle delivery pipeline is used to deliver the aerosol particle airflow into the environmental chamber.

3. The device for measuring dynamic heterogeneous coagulation of a single particle in suspension according to claim 1, characterized in that: The device also includes: A temperature-controlled water bath is communicated with the environmental chamber and is used to adjust the temperature in the environmental chamber.

4. The device for measuring dynamic heterogeneous coagulation of a single particle in suspension according to claim 1, characterized in that: The device also includes: The humidity controller is arranged in the environmental chamber, and is used to detect humidity data in the environmental chamber, and increase or decrease the humidity in the environmental chamber according to the humidity data.

5. The device for measuring dynamic heterogeneous coagulation of a single particle in suspension according to claim 1, characterized in that: The second laser emitting assembly includes a second laser controller, a second laser, a second plane reflector, a second movable convex lens and a second displacement controller; The second laser controller is connected to the second laser, and the second laser controller is used to control the second laser to generate a second laser; The second laser, the second plane reflector and the second movable convex lens are arranged in sequence, so that the second laser passes through the second plane reflector and the second movable convex lens in sequence and then enters the environmental chamber; The second displacement controller is connected to the second plane reflector and the second movable convex lens respectively, and is used to control the movement of the second plane reflector and the second movable convex lens so that the light trap formed by the second laser and the first laser captures and drives the aerosol particles to move in the environmental chamber; The second laser controller is further used to adjust the laser power of the second laser when the aerosol particles move in the environmental chamber, so that the aerosol particles remain captured by the light trap.

6. The device for measuring dynamic heterogeneous coagulation of a single particle in suspension according to claim 1, characterized in that: The particle heterogeneous condensation observation component is an optical microscope.

7. A method for measuring the dynamics of heterogeneous condensation of a single particle in a suspended state, using the device for measuring the dynamics of heterogeneous condensation of a single particle in a suspended state as claimed in any one of claims 1 to 6, characterized in that: The method comprises: A saturated steam environment is formed in the environmental chamber; generating an aerosol particle airflow through an aerosol particle generating component, and conveying the aerosol particle airflow to the environmental chamber; the aerosol particle airflow includes a plurality of aerosol particles; A first laser is emitted to the environmental chamber through a first laser emission assembly, and a second laser is emitted to the environmental chamber through a second laser emission assembly, so that the first laser and the second laser converge in the environmental chamber and generate a light trap; the light trap captures the aerosol particles, and then drives the aerosol particles to move in the environmental chamber, and the aerosol particles condense and grow during the movement; Observing the particle sizes of the aerosol particles at different times in the environmental chamber through a particle heterogeneous condensation observation component; The heterogeneous condensation growth rate of the aerosol particles is calculated according to the plurality of particle sizes by a movement rate calculation component.

8. The method for dynamic measurement of heterogeneous coagulation of a single particle in suspension state according to claim 7, characterized in that: The method further comprises: When the aerosol particles move in the environmental chamber, the laser power of the first laser is adjusted by the first laser controller in the first laser emitting assembly, and the laser power of the second laser is adjusted by the second laser controller in the second laser emitting assembly, so that the light trap generated by the convergence of the first laser after power adjustment and the second laser after power adjustment can still capture the aerosol particles, so that the aerosol particles remain captured by the light trap in the environmental chamber.

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