A tobacco leaf pest online monitoring device and method

Abstract

The present invention discloses an online monitoring device and method for tobacco pests, and belongs to the field of tobacco pest monitoring. The device comprises a main body, an electric shock module, a tobacco pest detection chamber, a negative pressure chamber, and an insect receiving box; the electric shock module comprises two variable spacing electrodes installed inside the main body and arranged opposite to each other, the variable spacing size is adjustable, and the spacing from top to bottom is from large to small; the cylindrical body area between the top and bottom air flow outlets of the tobacco pest detection chamber is the pest detection area, the laser range emitted by the laser covers a section or all of the pest detection area, and the light detection counter receives the scattered light information generated by the insect body passing through the pest detection area; there is an airflow from top to bottom in the pest detection area; the negative pressure chamber can provide a negative pressure environment; and the insect receiving box is located below the negative pressure chamber. The present invention can improve the real-time and accuracy of pest monitoring in tobacco storage and production sites, and the shot-down insect body can be instantly sucked into the detection chamber by negative pressure without the help of the Internet of Things external network, avoiding the problem of explosive insect body adhering to the electrode.

Description

Technical Field

[0001] The invention relates to the field of tobacco leaf pest monitoring, and in particular to an online tobacco leaf pest monitoring device and method. Background Art

[0002] Tobacco beetles and tobacco powder borers are worldwide tobacco storage pests, especially in the storage and processing of tobacco and tobacco products. Tobacco powder borers mostly occur in environments with high humidity, mainly harming flue-cured tobacco, laying eggs near the midrib of tobacco leaves, in folds, cracks, depressions or on packaging, especially on upper and medium tobacco leaves. After hatching, the larvae hide in the tobacco pile and feed on tobacco leaves for up to 2-3 months. The main way of damage is that the larvae eat the leaves from the surface to the inside, excrete feces while eating tobacco leaves, and use the spitted silk to connect broken tobacco or tobacco leaves together. After the tobacco leaves are eaten, irregular holes or notches appear, which greatly reduces the silk rate of tobacco leaves and affects the availability of tobacco leaves. In addition, the insect corpses, feces, and filaments produced contaminate tobacco leaves, seriously affecting the taste and quality of tobacco leaves, and thus causing great economic losses.

[0003] At present, the pest monitoring in tobacco storage, silk making, and packaging production workshops mostly uses tobacco pest pheromone traps, which rely on manual inspections, are inefficient, labor-intensive, and easily delay the best time to prevent and control pests. In particular, the high-rise space of the silk workshop is inaccessible to humans and has always been a blank area for tobacco pest monitoring. Therefore, it is extremely urgent to develop an online monitoring device for tobacco leaf pests to solve the problem of intelligent and scientific management of tobacco leaf pest monitoring in tobacco leaf storage and production workshops of cigarette manufacturers, and to transform the traditional manual monitoring mode.

[0004] In the existing tobacco pest monitoring standards, the sex attractant + sticky board mode is basically adopted, and the insects are counted manually or uploaded by camera, and identified and counted by image processing methods. The sticky board and the attractant core need to be replaced manually regularly, and the insect photos taken need to be uploaded to the cloud server for relevant algorithm processing to realize the insect counting. Online processing cannot be realized without Internet. In addition, there is the electric shock net method, in which the insect body explodes instantly and sticks to the electrode, which is difficult to clean and inconvenient for accurate counting. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes an online monitoring device and method for tobacco leaf pests, which is suitable for monitoring tobacco leaf pests in tobacco leaf storage or production sites. The present invention replaces manual counting, improves the real-time and accuracy of pest monitoring in tobacco leaf storage and production sites, and does not require the use of an IoT external network. The shot-down insect body can be instantly sucked into the detection chamber by negative pressure, avoiding the problem of explosive insect bodies sticking to electrodes.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A tobacco leaf pest online monitoring device, comprising:

[0008] The main body is in the shape of an inverted cone and is fixed on the column, and the entrance at the top of the main body is open;

[0009] The electric shock module comprises a first electrode and a second electrode which are installed inside the main body and are arranged opposite to each other. The distance between the two electrodes is a variable distance, the size of the variable distance is adjustable and the distance decreases from large to small from top to bottom;

[0010] A tobacco leaf pest detection chamber comprises a top airflow inlet and a bottom airflow outlet aligned in a vertical direction, a light detection counter and a laser installed on the side wall of the detection chamber; the top airflow inlet is connected to the bottom outlet of the main body, the cylindrical area between the top airflow inlet and the bottom airflow outlet is a pest detection area, the laser range emitted by the laser covers a section or the entire pest detection area, and the light detection counter receives scattered light information generated by insects passing through the pest detection area; there is airflow from top to bottom in the pest detection area;

[0011] The negative pressure room is located below the tobacco leaf pest detection room and is used to provide a negative pressure environment;

[0012] The insect receiving box is located below the negative pressure chamber and is communicated with the negative pressure chamber.

[0013] As a preferred embodiment of the present invention, an insect-attracting light source with a wavelength of 400 nm is installed on the column, and the installation height of the insect-attracting light source is higher than the main body.

[0014] As a preferred embodiment of the present invention, a side wall of the main body connected to the column is a vertical plane.

[0015] As a preferred embodiment of the present invention, the first electrode is installed on the first inner wall of the main body, and the second electrode is installed on the second inner wall of the main body, and the second inner wall is inclined from top to bottom toward the first inner wall.

[0016] As a preferred embodiment of the present invention, the second electrode is a flexible plate electrode, which can be flexibly bent and deformed; a second electrode inclination angle adjustment device is provided at the bottom of the second inner wall, which can be adjusted so that the second electrode moves close to the first electrode without contacting the first electrode, and the size of the electric shock area can be changed by adjustment.

[0017] As a preferred embodiment of the present invention, under the action of the second electrode inclination angle adjustment device, the second electrode is divided into a continuous upper half and a lower half, and the angle between the lower half of the second electrode and the first electrode is not less than the angle between the upper half of the second electrode and the first electrode.

[0018] As a preferred embodiment of the present invention, a vertical incision slit is provided on the side wall of the tobacco pest detection chamber installed with a laser to limit the irradiation area of ​​the laser beam emitted by the laser. The laser emitted by the laser passes through the incision slit to form a fan-shaped laser irradiation area in the tobacco pest detection chamber. Pests that fall through the pest detection area will inevitably pass through the laser irradiation area.

[0019] As a preferred embodiment of the present invention, the light detection counter is installed on the inner wall of the tobacco leaf pest detection chamber, perpendicular to the laser installation surface.

[0020] As a preferred embodiment of the present invention, the top and bottom of the negative pressure chamber are open, the top of the negative pressure chamber is connected to the tobacco leaf pest detection chamber, and the bottom of the negative pressure chamber is connected to the insect receiving box; an axial flow fan is installed in the negative pressure chamber.

[0021] As a preferred embodiment of the present invention, a heating plate is provided at the bottom of the insect receiving box.

[0022] A monitoring method of an online monitoring device for tobacco leaf pests, comprising:

[0023] Fix the tobacco leaf pest online monitoring device in the tobacco leaf storage or production site through pillars, and start the device after debugging;

[0024] The tobacco leaf pests enter the main body from the top entrance of the main body under the inducement of the light source, and fall into the electric killing area of ​​the electric shock module under the negative pressure environment generated by the negative pressure chamber. As the distance between the first electrode and the second electrode of the electric shock module gradually decreases from top to bottom, the electric field strength gradually increases, and the air flow speed flowing through this area gradually increases, the tobacco leaf pests shot down by the electric shock module quickly fall into the tobacco leaf pest detection room;

[0025] When tobacco pests pass through the laser irradiation area in the tobacco pest detection room, the scattered light information generated by the insect body is obtained by the light detection counter. The type and number of tobacco pests are determined by the signal intensity and pulse width of the light detection counter. The insect body finally passes through the negative pressure chamber and falls into the insect receiving box.

[0026] The beneficial effects of the present invention are:

[0027] (1) Compared with the current method of monitoring tobacco leaf pests by sticking insects on sticky boards and then manually counting and uploading photos with cameras, the online monitoring device of the present invention can save a lot of tedious manual labor and improve the real-time and accuracy of pest monitoring in tobacco leaf storage and production sites.

[0028] (2) The present invention uses the scattering characteristics of the insect body to laser irradiation and measures the intensity and pulse width of the signal using a light detection counter to determine the type and number of tobacco leaf pests to be killed in real time without the need for an IoT external network. This is particularly important for tobacco leaf storage areas and closed production sites.

[0029] (3) The first electrode and the second electrode of the electric shock module of the present invention are both plate-shaped electrodes, and the distance between the first electrode and the second electrode is a variable spacing, the size of the variable spacing is adjustable and the spacing decreases from large to small from top to bottom. The tobacco leaf pests are lured by the light source from the top of the main body through the suction airflow and enter the electric shock killing area of ​​the electric shock module. As the electric field intensity gradually increases, the air flow speed flowing through this area gradually increases. The tobacco leaf pests shot down by the electric shock module quickly fall into the tobacco leaf pest detection room, avoiding the problem of cleaning the sticky electrodes of the exploded insects in the traditional high-voltage electric shock net. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the main structure of the online tobacco leaf pest monitoring device shown in an embodiment of the present invention.

[0031] Figure 2 It is a cross-sectional view of an online monitoring device for tobacco leaf pests shown in an embodiment of the present invention.

[0032] Figure 3 It is a schematic diagram of an electric shock module shown in an embodiment of the present invention.

[0033] Figure 4 It is a structural diagram of a tobacco leaf pest detection chamber shown in an embodiment of the present invention.

[0034] Figure 5 4 is a cross-sectional view of a tobacco leaf pest detection chamber shown in an embodiment of the present invention.

[0035] In the figure, 1-main body, 2-insect attracting light source, 3-column, 4-electric shock module, 41-first electrode, 42-second electrode, 43-boosting module, 44-control switch, 45-battery module, 46-insect electric shock area, 47-second electrode inclination angle adjustment device, 5-tobacco leaf pest detection chamber, 51-inner wall of the detection chamber, 52-laser, 53-incision slit, 54-laser irradiation area, 55-air flow inlet, 56-air flow outlet, 57-light detection counter, 521-laser emission beam angle, 522-pest detection area, 6-negative pressure chamber, 61-axial flow fan, 7-insect receiving box, 71-insect receiving container, 72-heating plate, 8-tobacco leaf pests. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0039] The accompanying drawings show various structural schematic diagrams of the embodiments disclosed in the present invention. These drawings are not drawn to scale, and some details are exaggerated and some details may be omitted for the purpose of clear expression.

[0040] like Figure 1 As shown, the tobacco leaf pest online monitoring device proposed by the present invention comprises:

[0041] The main body 1 is in the shape of an inverted cone and is fixed on the column 3. The top entrance of the main body 1 is open.

[0042] The electric shock module 4 includes a first electrode 41 and a second electrode 42 installed on the inner wall of the main body 1 and arranged opposite to each other. The distance between the two electrodes is a variable distance, the size of the variable distance is adjustable and the distance decreases from top to bottom;

[0043] Tobacco leaf pest detection chamber 5, used to detect and count the pests knocked down by the electric shock module 4;

[0044] The negative pressure chamber 6 is located below the tobacco leaf pest detection chamber 5 and is used to provide a negative pressure environment;

[0045] The insect receiving box 7 is located below the negative pressure chamber 6 and is communicated with the negative pressure chamber 6.

[0046] The negative pressure formed by the negative pressure chamber 6 located at the upper part of the insect receiving box 7 sucks the tobacco leaf pests 8 into the main body entrance of the monitoring device, and then falls into the insect receiving box 7 after passing through the electric shock module 4 and the tobacco leaf pest detection chamber 5.

[0047] In a specific implementation of the present invention, since the monitoring device of the present invention is mainly used in indoor production places such as tobacco storage, silk making, and rolling, the column is designed to be a semi-cylinder for easy fixing on the wall. The column can also be made into a cylindrical or square column and fixed on a ground base. An insect-attracting light source 2 is installed on the upper part of the column, and the installation height of the insect-attracting light source 2 is higher than the main body 1. The wavelength of the light source can be selected according to the photosensitivity characteristics of the pests to be detected. The tobacco leaf pests attracted by this embodiment are mainly tobacco beetles and tobacco powder borers, and the photosensitivity wavelength is optimal at 400 nm. Therefore, the insect-attracting light source uses 400 nm ultraviolet LED lamp beads, each lamp bead is 0.1 watt, divided into multiple columns, each column has multiple lamp beads, preferably 3 columns, and each column has 10 lamp beads. When tobacco leaf pests, such as tobacco beetles and tobacco white borers, attracted by the insect-attracting light source 2 enter the vicinity of the main light source of the device, the negative pressure sucks the pests into the electric shock area formed between the first electrode and the second electrode of the electric shock module. The high voltage between the first electrode and the second electrode kills the pests, and the insect body enters the tobacco leaf pest detection chamber 5 with the air flow, and enters the insect receiving box after the detection is completed.

[0048] like Figure 2 As shown, the first electrode 41 of the electric shock module 4 is installed on the first inner wall of the main body 1, and the second electrode 42 is installed on the second inner wall of the main body 1. The second inner wall is inclined toward the first inner wall from top to bottom. The first electrode 41 and the second electrode 42 are opposite to each other, and a pest electric killing area is formed between the first electrode and the second electrode. When the pest falls into the electric killing area, high voltage discharge occurs between the first electrode and the second electrode and an arc spark is generated. In order to kill tobacco leaf pests more effectively, the second electrode 42 is a flexible metal sheet, and the lower part is bent toward the first electrode 41, so that the interval between the first electrode 41 and the second electrode 42 becomes smaller, the electric field strength between the electrodes is increased, and the air flow speed flowing through this area is increased, which is conducive to efficiently killing pests and quickly falling into the detection chamber, avoiding the pest bodies from adhering to the first electrode 41 or the second electrode 42; in this embodiment, a second electrode inclination angle adjustment device 47 is provided at the bottom of the second inner wall in the main body, and under the action of the second electrode inclination angle adjustment device 47, the second electrode 42 is divided into a continuous upper half and a lower half, and the angle between the lower half of the second electrode 42 and the first electrode 41 is not less than the angle between the upper half of the second electrode 42 and the first electrode 41. The device can be an insulating threaded rod that can be rotated and extended. The threaded rod is threadedly connected to the second inner wall in the main body. The inner end of the threaded rod is connected to the lower part of the second electrode in the main body. The outer end of the threaded rod is located outside the main body. The length of the threaded rod extending into the main body can be adjusted by rotating the outer end, thereby adjusting the inclination angle of the second electrode and changing the distance between the two electrodes. The distance can be adjusted according to the voltage size and the negative pressure intensity.

[0049] like Figure 2As shown, the top and bottom of the negative pressure chamber 6 are open, the top of the negative pressure chamber 6 is connected to the tobacco leaf pest detection chamber 5, and the bottom of the negative pressure chamber 6 is connected to the insect receiving box 7; an axial flow fan 61 is installed in the negative pressure chamber 6, and the axial flow fan 61 is used to generate negative pressure to make the insect body of the pest 8 fall into the detection chamber; the insect receiving box 7 is connected to the tube body of the negative pressure chamber 6 through a bayonet or a screw, and the main structure of the insect receiving box 7 is an insect receiving container 71, which can be disposable or reusable. A heating plate 72 is provided at the bottom of the insect receiving box 7, and the insect body remains in the insect receiving container 71 are heated by the heating plate 72 to dehydrate, so as to prevent the insect body from rotting and deteriorating during processing, and polluting the surrounding environment.

[0050] like Figure 3 As shown, the first electrode 41 and the second electrode 42 in the electric shock module 4 are isolated from each other, the first electrode 41 is a straight plate electrode, and the second electrode 42 is a flexible metal sheet that can be flexibly bent and deformed, so that the distance between the first electrode 41 and the second electrode 42 is adjustable, and a pest electric killing zone 46 is formed between the two electrodes. The electric shock insect zone 46 surrounded by the first electrode 41 and the second electrode 42 is also in the shape of an inverted cone. When the pest 8 falls from the inlet of the device to the electric shock killing zone 46 with the airflow, the high voltage discharge between the first electrode 41 and the second electrode 42 is used to electric shock and kill the pest 8. The upper inlet area of ​​the electric shock killing zone 46 is larger than the lower outlet area, so that the airflow is accelerated when it flows through the electric shock killing zone 46, which is conducive to the pest 8 to quickly pass through the electric shock killing zone 46 without being retained. The electric shock module 4 is connected to the boost module 43, the control switch 44 and the battery module 45. The battery module 45 can be a lithium battery pack, which is used to power the entire device, including the insect attractant light source 2, the boost module 43, the axial fan 61, the heating plate 72, etc.; the control switch 44 is used to control the start and stop of the device, and the boost module 43 is used to boost the voltage provided by the battery module and apply it to the first electrode 41 and the second electrode 42; the boost module 43 can be implemented according to a conventional boost circuit.

[0051] like Figure 4As shown, the tobacco leaf pest detection chamber 5 is a square structure, including a top airflow inlet 55 and a bottom airflow outlet 56 aligned in the vertical direction, a light detection counter 57 and a laser 52 installed on the side wall of the detection chamber; there is airflow from top to bottom between the top airflow inlet 55 and the bottom airflow outlet 56. The shell material of the tobacco leaf pest detection chamber 5 is metal, such as stainless steel or aluminum alloy, and the inner wall surface 51 of the detection chamber is a black hard foam material, which can eliminate the reflection of laser on the inner wall surface 51 of the detection chamber and thus affect the detection result of the light detection counter 57. The laser 52 is installed on one side of the detection chamber 5. A slit 53 is provided on the side wall of the tobacco pest detection chamber where the laser 52 is installed, which is similar to a laser light shaper. The laser emitted by the laser 52 passes through the slit 53 and forms a fan-shaped laser irradiation area 54 in the tobacco pest detection chamber 5. The light detection counter 57 is located on the inner wall of the tobacco pest detection chamber 5 and is perpendicular to the laser installation surface. The light detection counter 57 can be a single photodiode, and a filter can be used to measure scattered light in a discrete wavelength range, or a linearly arranged sensor array can be used to receive a wide laser beam from the line laser 52.

[0052] like Figure 5 As shown, the top airflow inlet of the tobacco leaf pest detection chamber 5 is connected to the bottom outlet of the main body 1, and the cylindrical area between the top airflow inlet and the bottom airflow outlet is the pest detection area 522. The laser range emitted by the laser 52 covers a section or the entire pest detection area 522. The pests falling through the pest detection area 522 must pass through the laser irradiation area 54. The light detection counter 57 receives the scattered light information generated by the insect body passing through the pest detection area 522; the cut slit 53 limits the laser output beam angle 521; the laser 52 of this embodiment emits a wide beam with an output beam angle of 80 degrees, and the laser output wide beam just covers a section of the pest detection area 522; the light detection counter 57 measures the light scattered by the pest 8 introduced into the pest detection area 522 along with the airflow of the airflow inlet 55 when passing through the laser irradiation area 54; the emission wavelength of the laser 52 is between 405 nm and 900 nm, which is used to detect the scattered radiation induced by the pest body; the preferred laser wavelength 532 of this embodiment nm, which can not only guide the pest 8 to produce effective scattered radiation when the insect body passes through the pest detection area 522 with the airflow, but also ensure the safety of the equipment operator.

[0053] In a specific implementation of the present invention, the light detection counter 57 includes a data acquisition device and a microprocessor. The processor of the data acquisition device converts the analog detector signal into a digital detector signal and records or stores the detector signal. The microprocessor is used to associate the measured value of the data acquisition device with multiple attributes of the detected pest 8, such as the type, size, and number of the pest 8. The collected signal can be amplified, calibrated, deconvolved, and formatted, and the generated data can be transmitted to other display storage devices or a client mobile terminal via a wired or wireless communication link. The scattered light information generated by the insect body is obtained by the light detection counter. Through the scattering characteristics of the insect body to laser irradiation, the type and number of the detected pest can be determined by comparing the signal intensity and pulse width according to the microprocessor of the light detection counter. The insect body finally falls into the insect receiving box through the axial flow fan.

[0054] In a specific implementation of the present invention, the monitoring method of the above tobacco leaf pest online monitoring device is:

[0055] (1) Fix the tobacco leaf pest online monitoring device in the tobacco leaf storage or production site through pillars and start the device after debugging;

[0056] (2) Tobacco beetles and tobacco leaf borers in tobacco storage and production workshops are lured into the entrance area of ​​the online monitoring device by ultraviolet light source (wavelength 400nm), and then they are entrained into the electric killing area by the inhaled airflow, and then enter the tobacco leaf pest detection room 5 with the airflow;

[0057] (3) In the tobacco leaf pest detection chamber 5, the laser irradiated onto the insect body generates scattered radiation which is collected and processed by the data acquisition device of the light detection counter, and the obtained measured values ​​are further correlated with multiple attributes of the insect body to determine the type and quantity of the insect body;

[0058] (4) The relevant processing results are transmitted to other display storage devices or user mobile terminals via wired or wireless communication links.

[0059] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. An online monitoring device for tobacco leaf pests, characterized in that: include: The main body (1) is in the shape of an inverted cone and is fixed on the column (3). The top entrance of the main body (1) is open. The electric shock module (4) comprises a first electrode (41) and a second electrode (42) which are installed inside the main body (1) and arranged opposite to each other, wherein the distance between the two electrodes is a variable spacing, the size of the variable spacing is adjustable and the spacing decreases from large to small from top to bottom; A tobacco leaf pest detection chamber (5) comprises a top airflow inlet and a bottom airflow outlet aligned in a vertical direction, a light detection counter (57) mounted on a side wall of the detection chamber, and a laser (52); the top airflow inlet is connected to the bottom outlet of the main body (1); the cylindrical area between the top airflow inlet and the bottom airflow outlet is a pest detection area (522); the laser range emitted by the laser (52) covers a section or the entire pest detection area (522); the light detection counter (57) receives scattered light information generated by insects passing through the pest detection area (522); and there is airflow from top to bottom in the pest detection area (522); A negative pressure chamber (6), located below the tobacco leaf pest detection chamber (5), for providing a negative pressure environment; The insect receiving box (7) is located below the negative pressure chamber (6) and is communicated with the negative pressure chamber (6).

2. The tobacco leaf pest online monitoring device according to claim 1, characterized in that: An insect-attracting light source (2) with a wavelength of 400 nm is installed on the upright column (3), and the installation height of the insect-attracting light source (2) is higher than that of the main body (1).

3. The tobacco leaf pest online monitoring device according to claim 1, characterized in that: The first electrode (41) is mounted on a first inner wall of the main body (1), and the second electrode (42) is mounted on a second inner wall of the main body (1), wherein the second inner wall is inclined from top to bottom toward the first inner wall.

4. The tobacco leaf pest online monitoring device according to claim 3, characterized in that: The second electrode (42) is a flexible plate-shaped electrode, and a second electrode inclination angle adjustment device is provided at the bottom of the first inner wall.

5. The tobacco leaf pest online monitoring device according to claim 4, characterized in that: Under the action of the second electrode tilt angle adjustment device, the second electrode (42) is divided into a continuous upper half and a lower half, and the angle between the lower half of the second electrode (42) and the first electrode (41) is not less than the angle between the upper half of the second electrode (42) and the first electrode (41).

6. The tobacco leaf pest online monitoring device according to claim 1, characterized in that: A vertical slit (53) is provided on the side wall of a tobacco leaf pest detection chamber equipped with a laser (52). Laser light emitted by the laser (52) passes through the slit (53) to form a fan-shaped laser irradiation area (54) in the tobacco leaf pest detection chamber (5). Pests that fall through the pest detection area (522) must pass through the laser irradiation area (54).

7. The tobacco leaf pest online monitoring device according to claim 6, characterized in that: The light detection counter (57) is installed on the inner wall of the tobacco leaf pest detection chamber, perpendicular to the laser installation surface.

8. The tobacco leaf pest online monitoring device according to claim 1, characterized in that: The top and bottom of the negative pressure chamber (6) are open; the top of the negative pressure chamber (6) is connected to the tobacco leaf pest detection chamber (5); and the bottom of the negative pressure chamber (6) is connected to the insect receiving box (7); an axial flow fan (61) is installed in the negative pressure chamber (6).

9. The tobacco leaf pest online monitoring device according to claim 1, characterized in that: A heating plate (72) is provided at the bottom of the insect receiving box (7).

10. A monitoring method of the tobacco leaf pest online monitoring device according to claim 6, characterized in that: include: Fix the tobacco leaf pest online monitoring device in the tobacco leaf storage or production site through pillars, and start the device after debugging; The tobacco leaf pests enter the main body (1) from the top entrance of the main body (1) under the inducement of the light source, and fall into the electric killing area of ​​the electric shock module (4) under the effect of the negative pressure environment generated by the negative pressure chamber (6). Since the distance between the first electrode (41) and the second electrode (42) of the electric shock module (4) gradually decreases from top to bottom, the electric field strength gradually increases, and the air flow speed flowing through this area gradually increases, and the tobacco leaf pests shot down by the electric shock module (4) quickly fall into the tobacco leaf pest detection chamber (5); When tobacco leaf pests pass through the laser irradiation area (54) in the tobacco leaf pest detection chamber (5), scattered light information generated by the insect body is obtained by the light detection counter (57), and the type and number of the tobacco leaf pests are determined by the signal intensity and pulse width of the light detection counter (57). The insect body finally passes through the negative pressure chamber (6) and falls into the insect receiving box (7).

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