A collection device for aerosol deposition experiments

Abstract

The present invention specifically relates to a collection device that can be used in aerosol deposition experiments, which solves the problem of large experimental errors caused by airflow disturbances in current experiments. The present invention is used to be placed in an experimental cabin that provides a rain or snow environment, and includes a sample placement cabinet, a placement rack, a sampling tray, an electric push rod assembly, a drive assembly, a power supply and a control terminal; multiple placement racks are arranged in the sample placement cabinet to form a multi-layer structure; each placement rack corresponds to a sampling tray, and the electric push rod assembly is installed inside the sample placement cabinet. The electric push rod assembly is used to remove the sampling tray from the placement rack and move it to the outside of the sample placement cabinet when sampling, and to put the sampling tray back on the placement rack after sampling is completed, as well as to control the opening and closing of the sample placement cabinet; the output end of the drive assembly is connected to the electric push rod assembly; the output end of the control terminal is connected to the input end of the drive assembly; and the power supply is connected to the control terminal and the drive assembly respectively.

Description

Technical Field

[0001] The present invention relates to a collection device, and in particular to an aerosol collection device and a method of using the same. Background Art

[0002] Aerosols have significant environmental, radiative, and climatic effects. They not only impact regional climate, the environment, and human health, but also influence ecosystem carbon cycling. Increased aerosol particles reduce total solar radiation and increase the proportion of diffuse radiation, which in turn affects vegetation photosynthesis.

[0003] In order to study the effects of different meteorological conditions such as rainfall and snowfall on aerosol deposition, aerosol deposition experiments were conducted in the experimental cabin using artificial rainfall and snowfall. During the experiment, the aerosol deposition under rainfall and snowfall conditions in different time periods needed to be collected.

[0004] During the experiment, the door of the experimental chamber was closed between rain and snowfall to avoid any errors. Aerosol deposition was also collected within the chamber over a specific period of time. However, the disturbance of the airflow within the chamber still caused significant experimental errors. Summary of the Invention

[0005] In order to solve the problem of large experimental errors caused by airflow disturbance, the present invention provides an aerosol collection device and a method of using the same.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] A collection device for aerosol deposition experiments, which is placed in an experimental chamber providing a rain or snow environment, is unique in that it includes a sample placement cabinet, a placement rack, a sampling tray, an electric push rod assembly, a drive assembly, a power supply, and a control terminal;

[0008] A plurality of the placement racks are arranged in the sample placement cabinet to form a multi-layer structure;

[0009] Each of the placement racks corresponds to a sampling tray, and the electric push rod assembly is installed inside the sample placement cabinet. The electric push rod assembly is used to take the sampling tray out of the placement rack and move it to the outside of the sample placement cabinet when sampling is performed, and to put the sampling tray back on the placement rack after sampling is completed, as well as to control the opening and closing of the sample placement cabinet;

[0010] The output end of the driving assembly is connected to the electric push rod assembly for controlling the movement of the electric push rod assembly;

[0011] The output end of the control terminal is connected to the input end of the driving component;

[0012] The power supply is connected to the control terminal and the drive component respectively.

[0013] Furthermore, the sample placement cabinet includes a cabinet body and a cabinet door. The placement rack, the electric push rod assembly and the drive assembly are located in the cabinet body. The electric push rod assembly is used to control the up and down movement of the cabinet door.

[0014] Furthermore, the electric push rod assembly includes a longitudinal electric push rod, a transverse electric push rod and a door control electric push rod;

[0015] The fixed end of the transverse electric push rod is installed at the bottom end of the placement rack away from the cabinet door, and its movable end extends toward the cabinet door. The fixed end of the longitudinal electric push rod is hinged to the movable end of the transverse electric push rod. The movable end of the longitudinal electric push rod is provided with a sampling tray tow hook, which is used to connect with the sampling tray.

[0016] The fixed end of the door-controlled electric push rod is arranged at the bottom end of the placement frame away from the cabinet door, and its movable end extends upward and is connected to the cabinet door through a connecting rod to control the up and down movement of the cabinet door;

[0017] The longitudinal electric push rod, the transverse electric push rod and the door control electric push rod are respectively connected to the driving assembly.

[0018] Furthermore, the driving assembly includes three motors located in the cabinet, and the three motors are respectively connected to the longitudinal electric push rod, the transverse electric push rod and the door control electric push rod;

[0019] The output end of the control terminal is connected to the input ends of the three motors respectively, and the power supply is connected to the three motors respectively.

[0020] Furthermore, the control terminal includes a Raspberry Pi and three motor controllers; the output ends of the three motor controllers are connected to the three motors in a one-to-one correspondence, and the input ends of the three motor controllers are connected to the output ends of the Raspberry Pi;

[0021] The power supply is connected to the motor controller and the Raspberry Pi respectively.

[0022] Furthermore, the sampling disc is unhooked into a cylindrical strong magnet.

[0023] Furthermore, the motor controller includes an L298N stepper motor driver chip, the power supply is connected to the L298N stepper motor driver chip, the output end of the L298N stepper motor driver chip is connected to the input end of the motor, and the input end of the L298N stepper motor driver chip is connected to the output end of the Raspberry Pi.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] (1) The present invention realizes a closed environment through the sample placement cabinet, ensuring that the sampling plate can be placed in a closed environment after the sampling is completed, preventing the airflow generated by opening the experimental cabin after the experiment is completed from affecting the sampling plate.

[0026] (2) The present invention realizes the entire process of automatic control of sampling through the longitudinal electric push rod, the transverse electric push rod and the gate electric push rod as well as the connected motor, the motor controller and the Raspberry Pi, thereby avoiding human interference in the sampling process.

[0027] (3) Sampling is performed by controlling the sampling disk through the Raspberry Pi, which can accurately control the sampling time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the sample storage cabinet and the interior of the sample storage cabinet of the present invention;

[0029] Figure 2 This is a connection diagram of the electric push rod assembly, motor controller, motor and Raspberry Pi of the present invention.

[0030] The specific reference numerals are as follows:

[0031] 1-sample placement cabinet, 11-cabinet door, 2-placement rack, 3-sampling tray, 4-electric push rod assembly, 41-longitudinal electric push rod, 42-transverse electric push rod, 43-gate control electric push rod, 5-sampling tray tow hook, 6-motor controller, 7-power supply, 8-Raspberry Pi. DETAILED DESCRIPTION

[0032] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0033] A collection device that can be used in aerosol deposition experiments, such as Figure 1 As shown, it includes a sample placement cabinet 1, a placement rack 2 provided in the sample placement cabinet 1, a sampling tray 3 placed on the placement rack 2, an electric push rod assembly 4 installed in the sample placement cabinet 1, and a sampling tray decoupling 5 installed on the electric push rod assembly 4, and also includes a motor controller 6, a power supply 7 and a Raspberry Pi 8 located outside the experimental cabin.

[0034] The sample cabinet 1 is a square structure. A three-tiered rack 2, constructed from materials such as angle steel or stainless steel, is located within the cabinet. Racks 2 can be arranged in any number of layers, depending on experimental requirements. Each rack 2 is equipped with a sampling tray 3, which is positioned outside the cabinet 1 during aerosol sampling. A door 11 is provided within the cabinet 1 to close the cabinet.

[0035] The electric push rod assembly 4 controls the movement of the sampling tray 3 to control the up and down movement of the cabinet door 11 and thus control the opening and closing of the sample placement cabinet 1 .

[0036] The electric push rod assembly 4 includes a longitudinal electric push rod 41 that drives the sampling tray 3 to move longitudinally, a transverse electric push rod 42 that drives the sampling tray 3 to move transversely, and a door-controlled electric push rod 43 that controls the cabinet door 11. The longitudinal electric push rod 41, the transverse electric push rod 42, and the door-controlled electric push rod 43 are all equipped with motors. The longitudinal electric push rod 41 is also equipped with a sampling tray towing hook 5 for moving the sampling tray 3. The motors on the longitudinal electric push rod 41, the transverse electric push rod 42, and the door-controlled electric push rod 43 are each connected to a motor controller 6 in a one-to-one correspondence. The motor controller 6 is respectively connected to a power supply 7 and a Raspberry Pi 8. The Raspberry Pi 8 controls the power supply 7 to provide different voltages to different positions of the motor controller 6, thereby controlling the motor to manipulate the movement of the longitudinal electric push rod 41, the transverse electric push rod 42, and the door-controlled electric push rod 43.

[0037] The transverse electric push rod 42 is fixed to the bottom end of the placement rack 2, one end of the longitudinal electric push rod 41 is hinged to one end of the transverse electric push rod 42, and the sampling tray tow hook 5 is located on the other end of the longitudinal electric push rod 41. The sampling tray decoupling 5 is a cylindrical strong magnet with a radius of 3 cm and a height of 2 cm. The sampling tray decoupling 5 is connected to the longitudinal electric push rod 42 with a rectangular hard iron sheet. The rectangular hard iron sheet is 25 cm long and 5 cm wide. When the sampling tray decoupling 5 drives the sampling tray 3 to move, it is adsorbed on the bottom of the sampling tray 3. The plane formed by the longitudinal electric push rod 41 and the transverse electric push rod 42 is parallel to the side walls of the sample placement cabinet 1. The door control electric push rod 43 is fixed to the back of the placement rack 2, and controls the opening and closing of the sample placement cabinet 1 by controlling the cabinet door 11.

[0038] The motor controller 6 includes an L298N stepper motor driver chip, and the power supply 7 supplies power to the L298N stepper motor driver chip. The input end of the L298N stepper motor driver chip is connected to the Raspberry Pi 8, and the output end is connected to the input end of the motor. The output end of the motor is connected to the longitudinal electric push rod 41, the transverse electric push rod 42 and the gate electric push rod 43. The circuit connection diagram of the L298N stepper motor driver chip, the power supply 7 and the Raspberry Pi 8 is shown in FIG. Figure 2 As shown, the power supply 7 is a DC voltage.

[0039] The Raspberry Pi 8 controls the L298N stepper motor driver chip in the motor controller 6 and then controls the corresponding motor, so that it controls the movement of the longitudinal electric push rod 41, the transverse electric push rod 42 and the gate electric push rod 43, and then controls the various movement directions of the sampling disk 3.

[0040] Based on the above device, the method of using the device is as follows:

[0041] Ten sample cabinets 1 were placed in a laboratory exposed to rain or snow. The three sampling trays 3 in the sample cabinets 1 were positioned outside the sample cabinets 1 in sequence via the longitudinal electric push rod assembly 41, the transverse electric push rod assembly 42, and the gate-controlled electric push rod assembly 43, and began operating. After the first sampling tray 3 had collected aerosols for a certain period of time, the longitudinal electric push rod assembly 41 and the transverse electric push rod assembly 42 controlled the first sampling tray 3 to return to the rack 2 inside the sample cabinet 1, and then controlled the second sampling tray 3 to come out and continue sampling. After the third sampling tray 3 had completed sampling and returned to the sample cabinet 1, the gate-controlled electric push rod assembly 43 drove the cabinet door 11 downward, closing the sample cabinet 1 and placing the internal environment in a relatively static state. At this point, the laboratory's rain or snow stopped, and the laboratory was opened, ultimately obtaining data on the amount of aerosol collected by the sampling trays 3 at different time periods.

[0042] The movement of the longitudinal electric push rod assembly 41, the transverse electric push rod assembly 42 and the door-controlled electric push rod assembly 43 is directly controlled by sending signals to the L298N stepper motor driver chip through the Raspberry Pi 8, thereby indirectly controlling the extension and contraction of the electric push rod assembly 41, the transverse electric push rod assembly 42 and the door-controlled electric push rod assembly 43. When IN1 and IN2 in the L298N stepper motor driver chip are high voltage and low voltage respectively, the motor rotates forward; when IN1 and IN2 are low voltage and high voltage respectively, the motor reverses; when the ENA port is high voltage, the motor rotates; when the voltage is low, the motor stops.

[0043] The longitudinal electric push rod 41 is retracted to its shortest position at the initial position, and the sampling tray unhooking 5 is fixed on the longitudinal electric push rod 41. The transverse electric push rod 42 is extended to its longest position at the initial position. The gate control electric push rod 43 is retracted to its shortest position at the initial position.

[0044] When taking out the sampling tray 3 from the sample storage cabinet 1:

[0045] (1) The door-controlled electric push rod 43 extends upward to open the cabinet door 11.

[0046] (2) The transverse electric push rod 42 is shortened backward so that the sampling tray hook 5 is located at the bottom of the sampling tray 3.

[0047] (3) The longitudinal electric push rod 41 extends upward so that the sampling tray 3 is 2 cm away from the surface of the shelf 2 at that level.

[0048] (4) The transverse electric push rod 42 extends forward to its maximum length, and the longitudinal electric push rod 41 rotates outward around the movable end of the transverse electric push rod 42 to exit the cabinet door 11.

[0049] (5) The longitudinal electric push rod 41 is shortened downward, so that the sampling disk 3 reaches the sampling height, and the sampling disk 3 performs sampling.

[0050] (6) The door-controlled electric push rod 43 is shortened downward to close the cabinet door 11.

[0051] When placing the sampling tray 3 into the sample storage cabinet 1:

[0052] (1) The door-controlled electric push rod 43 extends upward to open the cabinet door 11, and the longitudinal electric push rod 41 rotates inward around the movable end of the transverse electric push rod 42 to enter the sample placement cabinet 1;

[0053] (2) The longitudinal electric push rod 41 extends upward so that the sampling plate 3 is 1.5 cm away from the top of the target layer placement rack 2;

[0054] (3) The horizontal electric push rod 42 is shortened backward, so that the sampling tray 3 reaches the top of the target layer placement rack 2;

[0055] (4) The longitudinal electric push rod 41 is shortened downward by 1.5 cm;

[0056] (5) The horizontal electric push rod 42 extends forward to its maximum length;

[0057] (6) The door-controlled electric push rod 43 is shortened downward to close the cabinet door 11.

[0058] This control method enables the movement of the sampling disc 3 and ensures that the sampling disc 3 will not be affected by airflow during the sampling process.

Claims

1. A collection device for aerosol deposition experiments, which is placed in an experimental chamber providing a rain or snow environment, characterized in that: It includes a sample placement cabinet (1), a placement rack (2), a sampling tray (3), an electric push rod assembly (4), a drive assembly, a power supply (7) and a control terminal; A plurality of the placement racks (2) are arranged in the sample placement cabinet (1) to form a multi-layer structure; Each of the placement racks (2) corresponds to a sampling tray (3), and the electric push rod assembly (4) is installed inside the sample placement cabinet (1). The electric push rod assembly (4) is used to take the sampling tray (3) out of the placement rack (2) and move it to the outside of the sample placement cabinet (1) when sampling, and to put the sampling tray (3) back on the placement rack (2) after sampling is completed, and to control the opening and closing of the sample placement cabinet (1); The output end of the driving assembly is connected to the electric push rod assembly (4) for controlling the movement of the electric push rod assembly (4); The output end of the control terminal is connected to the input end of the driving component; A power supply (7) is connected to the control terminal and the drive component respectively; The sample placement cabinet (1) comprises a cabinet body and a cabinet door (11), a placement rack (2), an electric push rod assembly (4) and a drive assembly are located in the cabinet body, and the electric push rod assembly (4) is used to control the up and down movement of the cabinet door (11); The electric push rod assembly (4) includes a longitudinal electric push rod (41), a transverse electric push rod (42) and a door control electric push rod (43); The fixed end of the transverse electric push rod (42) is mounted on the bottom end of the placement rack (2) away from the cabinet door (11), and the movable end thereof extends toward the cabinet door (11). The fixed end of the longitudinal electric push rod (41) is hinged to the movable end of the transverse electric push rod (42). A sampling tray towing hook (5) is provided on the movable end of the longitudinal electric push rod (41), and the sampling tray towing hook (5) is used to connect with the sampling tray (3). The fixed end of the door-controlled electric push rod (43) is arranged at the bottom end of the placement frame (2) away from the cabinet door (11), and the movable end thereof extends upward and is connected to the cabinet door (11) through a connecting rod, and is used to control the up and down movement of the cabinet door (11); The longitudinal electric push rod (41), the transverse electric push rod (42) and the door control electric push rod (43) are respectively connected to the drive assembly; The driving assembly includes three motors located in the cabinet, and the three motors are respectively connected to the longitudinal electric push rod (41), the transverse electric push rod (42) and the door control electric push rod (43); The output end of the control terminal is connected to the input end of the three motors respectively, and the power supply (7) is connected to the three motors respectively.

2. A collection device for aerosol deposition experiments according to claim 1, characterized in that: The control terminal includes a Raspberry Pi (8) and three motor controllers (6); the output ends of the three motor controllers (6) are connected to the three motors in a one-to-one correspondence, and the input ends of the three motor controllers (6) are connected to the output end of the Raspberry Pi (8); The power supply (7) is connected to the motor controller (6) and the Raspberry Pi (8) respectively.

3. The collection device for aerosol deposition experiment according to claim 2, characterized in that: The sampling plate drag hook (5) is a cylindrical strong magnet.

4. The collection device for aerosol deposition experiment according to claim 3, characterized in that: The motor controller (6) includes an L298N stepper motor driver chip, the power supply (7) is connected to the L298N stepper motor driver chip, the output end of the L298N stepper motor driver chip is connected to the input end of the motor, and the input end of the L298N stepper motor driver chip is connected to the output end of the Raspberry Pi (8).

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