Sensor for measuring dust concentration in atmosphere

Abstract

The utility model discloses a sensor for measuring the concentration of dust in the atmosphere, which comprises a main body assembly and a sensor assembly, the separation assembly comprises a sensor shell, a photoelectric transistor, a filter plate, an air inlet and a filter hole; a photoelectric transistor is fixed in the sensor shell; a filter plate is fixed in the sensor shell; an air inlet is connected to the top end of the filter plate; filter holes are formed in the outer surface of the filter plate; the center of the upper surface of the fixing plate is provided with a motor whose output end is connected with a fan. The utility model solves the problem that the existing sensor for measuring the dust concentration has larger-particle dust in the air, the particles can interfere the sensor, and the accurate detection on small particles is influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of particle sensor, especially to a sensor for measuring dust concentration in atmosphere. BACKGROUND

[0002] Particle sensors typically use optical principles, such as laser scattering or light transmission, to monitor airborne particulate matter. When light encounters particulate matter, it scatters or absorbs, and the sensor detects these changes to determine the concentration of particulate matter. Specifically, a laser inside the sensor emits a beam of light, and a photodiode captures the scattered light signal when airborne particulate matter passes through the beam. Then, the sensor calculates the number and size of particulate matter based on changes in the light signal.

[0003] However, it still has the following disadvantages in actual use:

[0004] The existing sensor for measuring dust concentration may have large particles of dust in the air, which can interfere with the sensor and affect its accurate detection of small particles (such as PM2.5).

[0005] Therefore, a new sensor for measuring dust concentration in atmosphere is proposed to solve the above problems. SUMMARY

[0006] The utility model discloses a sensor for measuring dust concentration in atmosphere, which solves the problem of existing sensors for measuring dust concentration that have large particles of dust in the air, which can interfere with the sensor and affect its accurate detection of small particles (such as PM2.5).

[0007] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0008] The utility model discloses a sensor for measuring dust concentration in atmosphere, which includes:

[0009] The main body assembly includes a louver box.

[0010] The separation assembly includes a sensor housing, a phototransistor, a filter plate, an air inlet, and a filter hole.

[0011] The sensor housing is fixedly installed inside the louver box, the phototransistor is fixedly installed inside the sensor housing, the filter plate is fixedly installed inside the sensor housing, the air inlet is connected to the top end of the filter plate, and the filter hole is formed on the outer surface of the filter plate.

[0012] Further, the main body assembly further includes a top cover and a box door.

[0013] The upper surface of the letter box is fixedly connected with a top cover, and the front surface of the letter box is hingedly connected with a letter box door.

[0014] Further, the separating assembly further comprises a connecting plate, a fixing plate, a motor and a fan.

[0015] The outer surface of the filter plate is fixedly connected with a connecting plate, the lower surface of the filter plate is welded with a fixing plate, the upper surface of the fixing plate is centrally provided with a motor, and the output end of the motor is connected with a fan.

[0016] Further, the pore diameter of the filter hole is the diameter of PM2.5, and one end of the connecting plate is connected to the outer surface of the sensor shell.

[0017] Further, the cleaning assembly further comprises an upper connector plate, a connecting shaft, a connecting frame and a brush.

[0018] The cleaning assembly comprises an upper connector plate, a connecting shaft, a connecting frame and a brush.

[0019] The upper end of the filter plate is internally fixed with an upper connector plate, the middle part of the upper connector plate is penetrated with a connecting shaft, and the outer surface of the connecting shaft is connected with the outer surface of a connecting frame.

[0020] Further, the brush is in contact with the inside of the filter plate, and the connecting shaft rotates in the upper connector plate.

[0021] Compared with the prior art, the utility model has the advantages that:

[0022] Firstly, the utility model discloses a sensor shell, a phototransistor, a filter plate, an air inlet, a filter hole, a connecting plate, a fixing plate, a motor and a fan are arranged, when the sensor is detecting, the staff controls the module through the shell, starts the motor, the motor drives the fan to rotate, the back of the fan faces the inside of the filter plate, air enters from the air inlet and passes through the filter plate, and then flows out from the middle of the bottom of the sensor shell, when the air enters the inside of the sensor shell, small particles of dust pass through the filter plate and enter the space between the filter plate and the sensor shell, at this time, the phototransistor receives the infrared light scattered by the dust and generates corresponding electric signals according to the light quantity received, and then the electric signals are transmitted to the cloud end of the database, and large particles of dust are blocked in the inside of the filter plate and flow out from the lower end of the filter plate, so that the detection precision of the sensor for small particles of dust is improved, the sensor itself is protected, and long-term stable operation is ensured.

[0023] Secondly, based on the beneficial effect one, an upper connector plate, a connecting shaft, a connecting frame and a brush are arranged, the inside of the filter hole is blocked in the long-term use of the filter plate, at this time, the staff opens the letter box door, holds the upper end of the connecting shaft and rotates the connecting shaft, the connecting shaft drives the connecting frame to rotate and drives the brush to rotate, so that the inside of the filter plate is cleaned, the filter plate is prevented from being blocked and affecting the separating effect, and the service life of the sensor is prolonged.

[0024] Of course, implementing any product of the present application does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, without creative labor, can also obtain other drawings according to these drawings.

[0026] Figure 1 The main component of the present application is a schematic diagram;

[0027] Figure 2 The separation assembly of the present application is a schematic diagram;

[0028] Figure 3 The separation assembly of the present application is a sectional view;

[0029] Figure 4 The structure of the cleaning assembly of the present application is a schematic diagram.

[0030] In the drawings, the components represented by each number are listed as follows:

[0031] 11, letter box; 12, top cover; 13, box door;

[0032] 21, sensor shell; 22, phototransistor; 23, filter plate; 24, air inlet; 25, filter hole; 26, connecting plate; 27, fixed plate; 28, motor; 29, fan;

[0033] 31, upper connecting plate; 32, connecting shaft; 33, connecting frame; 34, brush. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0035] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] Second, the utility model in combination with the schematic diagram is described in detail, in detail the utility model implementation is when, for the convenience of illustration, the section view of device structure will not be made local amplification according to general proportion, and the schematic diagram is only example, it should not limit the range of the utility model protection here. In addition, the three-dimensional spatial dimension of length, width and depth should be contained in actual production.

[0037] In order to make the purpose, technical scheme and advantage of the utility model more clear, the embodiment of the utility model will be further described in detail below in combination with the drawings.

[0038] Please refer to Figures 1-3 The embodiment is a sensor for measuring dust concentration in the atmosphere, comprising:

[0039] The main body assembly comprises a letter box 11.

[0040] The main body assembly further comprises a top cover 12 and a box door 13.

[0041] The upper surface of the letter box 11 is fixedly connected with the top cover 12, and the front surface of the letter box 11 is hingedly connected with the box door 13.

[0042] An instrument for measuring air temperature and humidity is arranged to reduce the influence of environmental factors on the measurement results.

[0043] The separation assembly comprises a sensor shell 21, a phototransistor 22, a filter plate 23, an air inlet 24 and a filter hole 25.

[0044] The sensor shell 21 is fixedly installed in the interior of the letter box 11, the phototransistor 22 is fixed in the interior of the sensor shell 21, the filter plate 23 is fixed in the interior of the sensor shell 21, the air inlet 24 is connected to the top end of the filter plate 23, and the filter hole 25 is formed in the outer surface of the filter plate 23.

[0045] The phototransistor 22 can sense the intensity change of light and convert it into an electrical signal, and in the meteorological detection equipment, it is used for detecting the amount of scattered light passing through the filter plate 23, the filter plate 23 is a plate material with a plurality of small holes, used for physically separating different sizes of particulate matters in the air, the air inlet 24 at the top end allows air to enter, and the filter hole 25 on the outer surface allows air to pass through while blocking larger particulate matters.

[0046] The separation assembly further comprises a connecting plate 26, a fixing plate 27, a motor 28 and a fan 29.

[0047] The connecting plate 26 is fixed to the outer surface of the filter plate 23, the fixing plate 27 is welded to the lower surface of the filter plate 23, the motor 28 is installed on the upper surface of the fixing plate 27, and the output end of the motor 28 is connected with the fan 29.

[0048] The motor 28 is used to drive the fan 29, so that the air can pass through the filter plate 23 for particle separation and detection. The fan 29 is connected to the output end of the motor 28. When the motor 28 works, the fan 29 rotates to generate air flow, helping to guide the air flow into the sensor and pass through the filter plate 23;

[0049] Working principle:

[0050] When the sensor is detecting;

[0051] Firstly, the operator controls the module through the shell, starts the motor 28, and drives the fan 29 to rotate. The back of the fan 29 faces the inside of the filter plate 23. The air will enter from the air inlet 24 and pass through the filter plate 23,

[0052] And the air flows out from the middle of the bottom of the sensor shell 21. When the air enters the inside of the sensor shell 21, the small particles of dust will pass through the filter plate 23 between the filter plate 23 and the sensor shell 21,

[0053] At this time, the phototransistor 22 receives the infrared light scattered by the dust and generates a corresponding electrical signal according to the change of the received light quantity, which is transmitted to the database cloud. The larger particles of dust are blocked inside the filter plate 23 and flow out from the lower end of the filter plate 23,

[0054] This step improves the detection accuracy of small particle dust of the sensor, protects the sensor itself, and ensures long-term stable operation.

[0055] Please refer to Figure 4 The embodiment is based on the above embodiment 1 and further includes:

[0056] The cleaning assembly;

[0057] The cleaning assembly includes an upper connecting plate 31, a connecting shaft 32, a connecting frame 33, and a brush 34.

[0058] The upper end of the filter plate 23 is fixed with the upper connecting plate 31. The middle part of the upper connecting plate 31 penetrates the connecting shaft 32. The outer surface of the connecting shaft 32 is connected with the outer surface of the connecting frame 33. One side of the outer surface of the connecting frame 33 is fixedly connected with the brush 34.

[0059] The connecting shaft 32 penetrates the shaft in the middle part of the upper connecting plate 31, which can be used to provide rotary motion to drive the connecting frame 33 and the brush 34 fixed thereon to perform cleaning work.

[0060] Working principle:

[0061] The filter plate 23 is used for a long time;

[0062] First, the filter hole 25 inside will be blocked, at this time, the staff will open the box door 13, and hold the upper end of the connecting shaft 32, and rotate the connecting shaft 32,

[0063] Then, the connecting shaft 32 drives the connecting frame 33 to rotate, and drives the brush 34 to rotate, and the inside of the filter plate 23 is cleaned, so as to avoid the filter plate 23 from being blocked and affecting the separation effect,

[0064] This step prolongs the service life of the sensor.

[0065] In the description of the utility model, it also needs to be explained that, unless there is definite provision and limitation, the terms "set", "install", "connect" and "connect" should be understood broadly, for example, it can be fixed connection, or it can be detachable connection, or it can be integrally connected; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through intermediate medium, or it can be the communication inside two elements. For ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0066] Finally, it should be pointed out that: the above only for the preferred embodiment of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or equivalent replacement is carried out to part of technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A sensor for measuring the concentration of dust in the atmosphere, characterized in that, Include: The main body assembly comprises a letter box (11); Separation assembly, the separation assembly comprises sensor shell (21), phototransistor (22), filter plate (23), air inlet (24), filter hole (25); The inside of the letter box (11) is fixedly installed with the sensor shell (21), the inside of the sensor shell (21) is fixedly installed with the phototransistor (22), the inside of the sensor shell (21) is fixedly installed with the filter plate (23), the top end of the filter plate (23) is connected with the air inlet (24), and the outer surface of the filter plate (23) is provided with the filter hole (25).

2. The sensor for measuring the concentration of dust in the atmosphere according to claim 1, wherein The main body assembly further comprises a top cover (12) and a box door (13); The upper surface of the letter box (11) is fixedly connected with the top cover (12), and the front surface of the letter box (11) is hingedly connected with the box door (13).

3. The sensor for measuring concentration of dust in the atmosphere according to claim 1, wherein The separation assembly further comprises a connecting plate (26), a fixed plate (27), a motor (28) and a fan (29); The outer surface of the filter plate (23) is fixedly connected with the connecting plate (26), the lower surface of the filter plate (23) is welded with the fixed plate (27), the upper surface of the fixed plate (27) is centrally provided with the motor (28), and the output end of the motor (28) is connected with the fan (29).

4. The sensor for measuring concentration of dust in the atmosphere according to claim 1, wherein The pore size of the filter hole (25) is the diameter of PM2.5, and one end of the connecting plate (26) is connected to the outer surface of the sensor shell (21).

5. The sensor for measuring concentration of dust in the atmosphere according to claim 1, wherein Further comprising a cleaning assembly; The cleaning assembly comprises an upper connecting plate (31), a connecting shaft (32), a connecting frame (33) and a brush (34); The upper end of the filter plate (23) is fixedly provided with the upper connecting plate (31), the middle part of the upper connecting plate (31) is penetrated by the connecting shaft (32), the outer surface of the connecting shaft (32) is connected with the outer surface of the connecting frame (33), and the outer surface of the connecting frame (33) is fixedly connected with the brush (34).

6. A sensor for measuring the concentration of dust in the atmosphere according to claim 5, characterized in that, The brush (34) is in contact with the inside of the filter plate (23), and the connecting shaft (32) rotates in the upper connecting plate (31).

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