295 results about "Dust detection" patented technology

The invention relates to the related technical field of dust detection, and provides a mining induced charge and light scattering fusion dust detection device and method.The dust detection device comprises a workbench, a sampling assembly and a detection assembly, and the sampling assembly comprises a sampling air pump, a conical airflow homogenizer and a closed sampling cavity; the detection assembly comprises an annular sliding rail, a light scattering detection module and an electrostatic induction detection module; the dust detection method comprises the following steps: S1, device initialization and zero calibration; s2, sampling preparation of dust-containing airflow; s3, dual-module synchronous signal acquisition; s4, data processing and temperature and humidity compensation; s5, carrying out anti-interference protection assembly; and S6, data fusion and result output. S7, device cleaning and standby; through cooperative work of the double detection modules, dust detection signals in different concentration intervals are accurately captured, wide-range coverage from low concentration to high concentration is achieved, and synchronous monitoring of dust concentration and particle size characteristics is achieved.

The invention belongs to the technical field of fabric breadth detection, and particularly relates to anti-wrinkle high-elasticity composite textile fabric breadth detection equipment which comprises a detection table, a feeding guide roller and a discharging guide roller which are arranged on the two sides of the top of the detection table, and a detection box fixedly arranged on the top of the detection table, a feeding hole and a discharging hole are respectively formed in two sides of the detection box, and a sealing door plate is arranged at the top of the detection box; and the dust detection mechanism is arranged on the side wall of the detection box. Through cooperative operation of the dust detection mechanism, the cleaning mechanism, the optical breadth detection mechanism, the electric signal adjusting mechanism, the marking mechanism and the like, the position of a detection component can be accurately adjusted according to the breadth of the fabric, dust and impurities of the fabric are cleaned, the device adapts to the fabrics with different thicknesses, breadth abnormal parts can be marked, meanwhile, the detection environment is optimized, and the detection efficiency is improved. The problems of measurement errors, dust interference and the like of existing equipment are effectively solved, and the detection precision, the applicability and the working efficiency are greatly improved.

The utility model provides a coal mine underground drilling on-line monitoring device system which comprises a drilling main body and a monitoring shell which are movably connected, the drilling main body is provided with an air inlet pipeline and an air outlet pipeline, an air inlet detection cavity channel and an air outlet detection cavity channel are arranged in the monitoring shell, the air inlet detection cavity channel is communicated with the air inlet pipeline, and the air outlet detection cavity channel is communicated with the air outlet pipeline. The air outlet detection cavity channel is communicated with the air outlet pipeline; a first flow detection assembly, a first pressure detection assembly and a first temperature detection assembly are arranged in the air inlet detection cavity channel, and a second flow detection assembly, a second pressure detection assembly, a gas detection assembly and a dust detection assembly are arranged in the air outlet detection cavity channel. A second temperature detection assembly and an obstacle detection assembly are further arranged on the peripheral wall of the monitoring shell. The device is high in detection speed and high in detection accuracy, and the automation degree of the coal mine drilling equipment is effectively improved.

The invention provides a coal mine underground MR safety training system, which comprises an intrinsically safe MR head display device, a multi-mode communication center module, a roadway environment sensing unit, a virtual-real fusion training engine and an intelligent evaluation system, and is characterized in that the intrinsically safe MR head display device comprises an annular distributed antenna array and a wide bandgap semiconductor circuit; the antenna is embedded in an anti-collision beam of the mining helmet, and intrinsic safety is achieved through dynamic power control; the multi-mode communication central module forms a dual-channel redundant architecture by an industrial Ethernet interface and a mining wireless unit, is internally provided with a dynamic routing chip, and automatically switches communication modes according to methane concentration and dust detection values to ensure low-delay and high-reliability transmission; the roadway environment sensing unit integrates a geological radar and a micro-seismic monitoring device, constructs a three-dimensional dynamic geological model in real time, and continuously updates roof displacement data.

The invention belongs to the technical field of optical lens dust removal, and particularly relates to a high-precision dust removal method and system for an optical lens. According to the invention, multiple imaging data are adopted for mutual verification, so that the dust detection accuracy is remarkably improved, the problem of missing detection or misjudgment possibly occurring in a traditional single detection mode is avoided, the reliability of the overall dust removal effect is further improved, the cleaning result can be monitored in real time, and dynamic strategy adjustment is performed according to feedback information; closed-loop feedback not only improves the dust removal efficiency, but also enables the cleaning process to have self-adaptive ability, can cope with changes of various environments and dust accumulation degrees, ensures that the cleaning quality can still be guaranteed under complex working conditions, provides customized cleaning schemes for different areas by utilizing compensation information, and improves the cleaning efficiency. Dust with different thicknesses and different accumulation conditions is treated in a targeted manner, the phenomenon of excessive cleaning or insufficient cleaning is avoided, and the purposes of protecting the surface of the lens and prolonging the service life of the lens are achieved.

The invention discloses an electronic screen film surface dust detection method based on photometric stereo. The method comprises the following steps: image acquisition: acquiring 4-8 grayscale images in different incident directions; image preprocessing: carrying out edge-preserving noise reduction processing on the original image by adopting a bilateral filter, improving the smoothness by combining a Gaussian filter, and converting the filtered image into a floating point type; normal reconstruction: calculating a surface normal vector corresponding to each pixel point through a least square method or robust estimation according to a photometric stereo principle by utilizing a multi-light source matrix form, and generating a normal distribution diagram; curvature calculation: estimating a local curved surface of each pixel neighborhood based on the reconstructed normal graph; and dust identification: through setting a dynamic threshold and a region growing algorithm, extracting a continuous and significant normal disturbance region, and carrying out classification, marking and visual output in combination with characteristics such as area, length, boundary curvature and the like.

The invention relates to the technical field of physicochemical property detection, in particular to a full-automatic smoke dust detection method and a tester, and the method comprises the following steps: acquiring the concentration, temperature and relative humidity data of the inner wall of a flue, and preprocessing; dividing the temperature sequence into a plurality of temperature subsequences, and obtaining a concentration subsequence and a relative humidity subsequence of a corresponding bit sequence; obtaining a noise content index of a single temperature subsequence; obtaining the size of a filtering window of the filter in a single temperature sub-sequence; acquiring peak values and valley values of all the concentration subsequences and the relative humidity subsequences, and acquiring in-peak elements of all the peak values; acquiring a violent index of each peak value; acquiring a humidity irrelevant coefficient of a single concentration subsequence; acquiring a concentration correction factor of a single concentration subsequence; and correcting each concentration sub-sequence. According to the method, the concentration correction factor can be adaptively adjusted according to different process parameters, so that the detection precision of the smoke concentration is improved.

The invention discloses a dust collector base station dust accumulation detection method and device, a terminal and a storage medium, and the method comprises the steps: monitoring the internal pressure of a dust collector base station in real time, obtaining an internal pressure value, and comparing the internal pressure value with a preset pressure threshold value to obtain a pressure measurement result when an air draft motor in the dust collector base station operates; when the pressure measurement result is abnormal, acquiring dust data in the dust collection bag through a dust collector base station dust detection sensor and analyzing the dust data; constructing a dust fullness evaluation formula according to the dust data, and judging whether the dust in the dust collection bag reaches a dust fullness standard or not according to the dust fullness evaluation formula; if the dust reaches the dust fullness standard, a dust fullness signal is sent to a prompt mechanism of the dust collector base station, and the prompt mechanism gives out a dust fullness warning. The dust accumulation condition in the dust collection bag can be accurately judged, the air draft motor is prevented from being damaged by dust accumulation, and the accuracy of dust fullness detection is improved.

The invention relates to dust detection, in particular to a dust isolation sensor with a self-cleaning function, which comprises a box body, the box body is provided with an air duct, the air duct is provided with an air inlet and an air outlet, the dust isolation sensor also comprises a light-emitting component and a light-sensing component, a graphite electrode is inserted into the air duct, and the graphite electrode is connected to one electrode of a direct-current power supply; an air suction port of the air suction fan faces an air outlet of the air duct; the vibration motor is mounted on the outer side wall of the air duct, and the vibration motor vibrates to drive the air duct to vibrate; the device further comprises an air blowing nozzle, the air blowing nozzle comprises an air inlet and an air blowing opening, the air blowing opening faces the inner cavity of the air channel, the air inlet is connected to an air pump, and the air pump is connected to an air source containing clean air. The box body is connected with a ceramic bracket which supports a graphite electrode; a rubber pad is padded at the connecting part of the ceramic bracket and the graphite electrode; dust in the air duct is continuously removed, and the long-term use stability of the dust sensor is kept.

The invention relates to the technical field of air filtering, and particularly discloses an anti-pollution air filtering device which comprises a box body, an air inlet and an air outlet, the air inlet and the air outlet are formed in the two ends of the box body respectively, the air inlet sucks air into the box body, the air outlet discharges treated air into a room, a filtering cavity is formed in the box body, and the filtering cavity is communicated with the box body. The filtering cavity is communicated with the air inlet, a filtering part is connected into the filtering cavity and used for filtering dust in air, the detection assemblies are connected into the filtering cavity, arranged at the two ends of the filtering part and used for detecting whether the wind resistance of the filtering part is increased or not, and when the difference value of the wind resistance on the two sides of the filtering part is within the standard value range, the detection assemblies are connected into the filtering cavity. The detection assembly monitors that the filtering part is in the unblocked state, when the detection assembly monitors that the difference value of the wind resistance on the two sides of the filtering part exceeds the standard range, the detection assembly detects whether the filtering part is blocked or not according to the difference value judgment value before and after the filtering part, then the filtering part can be cleaned in time, and transmission of the wind speed and the wind power is prevented from being slowed down.

The invention relates to the field of deep hole drilling, in particular to a deep hole drilling precision regulation and control method and device based on dust detection. When a machining instruction is received, tool data of equipment and material data of a workpiece are obtained; inputting the tool data and the material data into a preset correlation model, and analyzing and outputting equipment initial processing parameters through the correlation model; when the equipment starts machining, dust data of the machining area are obtained in real time, and whether the conditions for adjusting the machining parameters are met or not is judged according to the dust data; analyzing the dust data, extracting the dust capacity of the processing area, and if the dust capacity exceeds a preset dynamic threshold value, judging that the condition of adjusting the processing data of the equipment is met; based on a judgment result, analyzing dust distribution information of the workpiece machining area; and processing adjustment parameters of the equipment are generated according to the dust distribution information of the workpiece processing area. By analyzing the dust distribution information, the system can further optimize the conditions of the machining areas, and it is ensured that the machining effect of each area is accurately controlled.

The invention relates to the technical field of outdoor electrical equipment protection, and discloses an outdoor cabinet intelligent self-cleaning system adaptive to a complex environment, the self-cleaning system is composed of a cabinet shell, a dustproof module, a self-cleaning module, a dust collection groove, a detection module and a control module, the cabinet shell provides a high-strength and corrosion-resistant protection structure, and the dust collection groove is provided with a dust collection groove. Air circulation is realized through the air inlet and the air outlet; the dustproof module is used for intercepting external dust; the self-cleaning module is used for removing dust accumulated on a filter screen, the dust collecting groove is used for collecting dust generated in the cleaning process, the detection module is used for monitoring the environment and the state of the filter screen in real time and collecting key data, and the control module is used for data processing, intelligent decision making, control signal generation and dynamic cleaning strategy adjustment. Through cooperative work of the cabinet shell, the dustproof module, the self-cleaning module, the dust collection groove, the detection module and the control module, the system can accurately sense environment changes, self-adaptively trigger cleaning operation and efficiently reduce manual intervention.

The invention provides a photovoltaic module electrostatic adsorption type dust removal device and method based on longitudinal airflow, and relates to the technical field of photovoltaic power source.The device comprises a dust detection module, a dust removal module and a computer, and the method comprises the steps that dust detection is conducted based on the dust detection module; and driving a dust removal module to remove dust based on a dust detection result. According to the electrostatic adsorption type dust removal device based on the longitudinal airflow, intermittent longitudinal airflow is provided for assisting electrostatic adsorption type dust removal of the photovoltaic module for the first time, a pneumatic device with the switching period being 1 s is designed, dust particles jump under the action of electrostatic force and then rapidly leave a dust removal area under traction of the longitudinal airflow, the electrostatic adsorption type dust removal device based on the longitudinal airflow runs for 2 s, and the dust removal rate is 91.14%; the dust removal efficiency is obviously improved, and the dust removal process realizes low energy consumption, no hydration and no contact. In addition, the dust detection module is adopted to detect the dust, whether the dust needs to be removed or the removing parameters are judged, and use is convenient.

The utility model is applicable to the technical field of dust detection, and provides a cyclone breathing type dust filtering device which comprises a discharging assembly, a material distributing assembly is arranged at the bottom of the discharging assembly, a fan assembly is arranged on one side, far away from the discharging assembly, of the material distributing assembly, a base assembly is arranged at the bottom of the fan assembly, and the base assembly is provided with a dust collecting assembly. The discharging assembly comprises a discharging main body, a first storage groove is formed in the discharging assembly, a second storage groove is connected with the first storage groove, the second storage groove is conical, a first discharging hole is formed in the end, with the smaller diameter, of the second storage groove, a fan main body is connected with a motor, the motor starts the fan main body, and the fan main body is connected with the discharging assembly. The fan body drives the fan blades, the fan blades rotate to drive dust to flow, the dust flows through the discharging channel and then flows to the dust detection position through the discharging port, the whole device achieves dust conveying, and it is guaranteed that the dust reaches the dust detection position by controlling the dust flow speed and the dust flowing channel.

The invention discloses a digging and anchoring surface'pressing-pumping-spraying 'intelligent cooperative dust control and removal experiment platform, which comprises an operation simulation system, a dust removal simulation system and an intelligent centralized control system, and is characterized in that the intelligent centralized control system comprises an industrial personal computer, and the industrial personal computer is used for driving and adjusting the operation simulation system and the dust removal simulation system; the operation simulation system comprises a digging and anchoring all-in-one machine and a belt conveyor, a plurality of groups of sensors are arranged in the roadway at intervals, each group of sensors comprises a roadway dust concentration sensor and a roadway gas concentration sensor, and the detection output end of each roadway dust concentration sensor is connected with the roadway dust detection signal input end of the industrial personal computer. The detection output ends of the roadway gas concentration sensors are connected with the roadway gas detection signal input end of the industrial personal computer; the dust removal simulation system comprises a pressure fan, a dust removal fan and a local pressure fan. Different working conditions can be simulated and verified, and an efficient, accurate and dynamically optimized comprehensive treatment scheme can be obtained.

The invention relates to the technical field of image processing, in particular to an intelligent dust identification method and system based on machine vision. The method comprises the following steps: acquiring a sequence of continuous video image frames of a target area; for any target frame in the sequence, a multi-channel fusion feature input map is constructed, and the multi-channel fusion feature input map comprises RGB channel data of the target frame, a wavelet transform coefficient of the target frame and an optical flow vector field of the target frame; and inputting the multi-channel fusion feature input graph into a preset dust neural network model, and outputting a dust detection result of the target area. According to the scheme, the dust condition of the target area can be accurately detected.

The invention relates to the technical field of air purification, in particular to a workshop air purifier intelligent regulation and control method based on laser dust detection, and the method comprises the steps: firstly obtaining particle size grading concentration data in real time through a laser detection device, and calculating a dynamic pollution index of each monitoring point in combination with a preset weight coefficient; a pollution core area and a diffusion trend are identified according to exponential distribution, an optimal air distribution scheme is generated based on the position of the core area and the concentration gradient, meanwhile, the purifier power and the filter screen mode are adjusted in a self-adaptive mode according to the concentration change rate and the target threshold value, and control parameters are optimized regularly based on an energy consumption efficiency model and the standard reaching time; according to the invention, the concentration data of PM10, PM2.5 and PM0.5 are obtained by grading in real time through the laser dust detection device, and the comprehensive hazard index of dust is accurately quantified in combination with a dynamic weight coefficient set by a respiratory deposition medical model, so that the problem that the particle size toxicity difference cannot be distinguished in the prior art is thoroughly solved.

The present invention relates to dust detection, and in particular to a dust isolation sensor with a self-cleaning function, comprising a box body, which is provided with an air duct, which has an air inlet and an air outlet, a light-emitting component and a photosensitive component, a graphite electrode inserted in the air duct, and the graphite electrode is connected to an electrode of a DC power supply; the air inlet of the suction fan faces the air outlet of the air duct; the box body also comprises a vibration motor, which is installed on the outer wall of the air duct, and the vibration of the vibration motor drives the air duct to vibrate; the box body also comprises an air blowing nozzle, which includes an air inlet and an air blowing port, and the air blowing nozzle faces the inner cavity of the air duct, the air inlet is connected to an air pump, and the air pump is connected to an air source containing clean air; the box body is connected to a ceramic bracket, which supports the graphite electrode; the part where the ceramic bracket is connected to the graphite electrode is padded with a rubber pad; the dust in the air duct is continuously removed to maintain the stability of the dust sensor during long-term use.

The invention discloses self-adsorption environment-friendly dust removal equipment which comprises a box body, a top plate is arranged on one side of the top of the box body, an adsorption plate is fixedly connected to the bottom of the top plate, and an air inlet hopper is fixedly connected to one side of the box body. According to the self-adsorption environment-friendly dust removal equipment and the control system, an exhaust fan is used for directly extracting and filtering, dust is prevented from being adsorbed on the inner wall of a pipeline, a dust sensor outside an air inlet hopper detects external dust, and the internal exhaust fan is started to suck external air when the external dust exceeds a threshold value; after being filtered by a filter plate and an adsorption plate in the box body, gas is sprayed through a vertical pipe in a spraying area, dust in the air can be better reduced, when the dust concentration is larger than 8 mg / m, a dust removal enhancing mode is started, the mode switching module can control the exhaust fan to increase the rotating speed, the exhaust capacity of the exhaust fan to the air outside the box body is enhanced, and the dust removal effect is improved. And the dust-removed air is discharged from the air outlet hopper.

The invention provides an environment detection device for a dust environment, and relates to the technical field of dust detection. The environment detection device for the dust environment comprises a movable base, the top end of the movable base is fixedly connected with a top end anti-falling frame, one side of the top end of the top end anti-falling frame is fixedly connected with a fixed box body, and a dust collection structure is arranged at the top end of the fixed box body; a detection box is arranged at the position, located on one side of the fixed box body, of the top end of the top end anti-falling frame, a detection structure is arranged on one side of the detection box, the dust collection structure comprises a top end conveying seat fixed to the top end of the fixed box body, and a transmission box is installed at the top end of the top end conveying seat. The environment detection device for the dust environment has the advantages that the problems that traditional dust detection equipment is poor in mobility, incomplete in sampling, lagged in detection and the like are solved, real-time monitoring, efficient sampling and data feedback of the dust environment are achieved, and reliable technical support is provided for operation safety protection and environment quality management and control.

The present invention provides a quantitative dust generator, comprising: a mounting frame; a powder receiving plate, the powder receiving plate comprising a plate body horizontally rotatably arranged on the mounting frame, the plate body being provided with an annular powder feeding groove with the center line of the plate body as the center line; a powder supply container, the powder supply container comprising a container shell, the container shell being arranged above a part of the powder receiving plate, the container shell being provided with a powder discharge adjustment structure matched with the position of the annular powder feeding groove; a powder shielding cover, the powder shielding cover being located outside the powder supply container and being fixed to the powder supply container, the powder shielding cover being provided with an air blowing port and an air suction port, the powder shielding cover and a part of the annular powder feeding groove jointly defining a dust generating space that can be fed with powder on one side. The present invention can continuously and stably form an airflow with a constant dust concentration, thereby providing a dynamically stable dust-containing sample for calibrating dust detection equipment.

1. The name of the design product: Dust particle counter (CA-680). 2. The use of the design product: For dust detection, calculate the amount of dust. 3. The design points of the design product: In shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The application belongs to the field of measuring equipment, and provides a hollow glass panel installation site detection device, which comprises a detection base, the front end surface of the detection base is provided with a walking plate passing port, the rear end of the detection base is provided with an adjusting motor assembly, the side surface of the adjusting motor assembly is provided with a handle assembly, the front end inner side of the detection base is provided with a panel seat which is nested with the detection base, a pair of rolling guide modules are arranged in the walking plate groove of the panel seat, the rolling guide modules are used for rolling cooperation with the frame edge of the window frame, a fan module and a pressure sensor module are arranged on the panel seat, the two sides of the detection base are provided with quick clamping strips, and screw detection modules are arranged on the quick clamping strips. The application has reasonable design, can realize screw detection, dust detection and sealing detection, has good portability and high utilization, and is suitable for large-scale promotion.

The utility model discloses a dust detector through control luminous time to control luminous quantity, including setting in the detection area's luminous element, light receiving element and be used for to the light current signal of light receiving element in producing amplification amplifier circuit, control and detect light emission and light receiving signal's singlechip, the drive circuit of luminous element adopts transistor switch circuit to control luminous time, the drive circuit includes transistor and current -limiting resistance, luminous element, transistor and current -limiting resistance series connection with power supply and form the electric loop, the transistor trigger control end is controlledly connected in the singlechip, the utility model discloses dust sensor through control luminous time realizes to luminous element luminous quantity control, through the luminous quantity of luminous element accurate control, can improve dust sensor measurement result's accuracy and reliability.

This invention provides a dust detection method and apparatus based on image processing, comprising: acquiring dust data within a current area, the dust data including dust image data and dust concentration data; processing the dust image data and dust concentration data using a trained dust feature analysis model to obtain dust feature data within the current area; and integrating and outputting the dust feature data through a visualization module to generate a visualized dust feature report. This method achieves a solution for combining image data and concentration data to obtain accurate dust feature data. By comprehensively analyzing the current dust concentration and image within a certain area, the real-time performance, accuracy, and stability of dust detection within that area are improved.

The invention provides a heavy calcium carbonate packaging quality detection method based on visual inspection, and relates to the technical field of heavy calcium carbonate packaging quality detection.The method comprises the steps that a low-dust detection angle and a high-dust detection angle are calculated according to the radian angle range of a packaging bag; the method comprises the following steps: acquiring pixel difference matrixes of in-bag areas of two images with high and low dust detection angles, performing shadow and brightness gradient identification on the in-bag areas according to the pixel difference matrixes, dividing brightness areas, and calculating the identification thickness of dust in each area according to the brightness of each brightness area, the method comprises the following steps: acquiring environmental parameters of a package detection area, calculating the thickness, position and quantity of different brightness areas of a bag-in-bag area, calculating a quality evaluation value of the bag-in-bag area, establishing a visual detection model, calculating a quality evaluation value of a bag end area, calculating a package quality score according to the quality evaluation value of the bag-in-bag area, and identifying the package quality.

1. The name of the design product: Dust particle counter (JHY-580T). 2. The use of the design product: For dust detection, calculate dust volume. 3. The design points of the design product: In shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model provides a dust sensor fixed bolster, especially related to mine dust detection technical field. This fixed bolster is fixed on the anchor rod of roadway support help department, and it includes base, support rod and connecting plate, the base includes bottom plate, four stands and three enclosures, the support rod is horizontally arranged between connecting plate and base, one end of support rod is fixed with the outside wall of one of the enclosures of base, and the other end is fixed with the side wall of connecting plate, the connecting plate is provided with fixed through -hole, and the anchor rod of roadway support help department is inserted into fixed through -hole and fixed with connecting plate through nut. The utility model has the advantages of simple structure, convenient installation and removal, can protect dust sensor from damage by external force during movement, solve the problem that current hanging mode does not conform to industry standard, greatly reduce sensor failure rate, reduce cost and workload of maintenance personnel.

The present invention provides a hydraulic breaker with a dust reduction function, belonging to the technical field of hydraulic breakers, including a hammer body and a drill rod. A second channel is opened inside the hammer body. One end of the drill rod extends into the second channel, and the other end extends to the bottom of the hammer body. The hydraulic breaker further includes a spray assembly, a main piston rod, a secondary piston rod, and a dust detection assembly. A first channel is also opened inside the hammer body. The main piston rod is arranged inside the second channel and is controlled by a hydraulic system to reciprocate up and down inside the second channel. Compared with the prior art, in the embodiment of the present invention, when the drill rod performs a crushing operation, not only can dust settlement be carried out, but also it can automatically select whether to perform dust reduction according to the amount of dust around the drill rod, thereby avoiding meaningless dust reduction operations when the amount of dust around the drill rod is small, and achieving the purpose of saving water resources.

The application discloses a dust detection device and method applied to city management, and belongs to the dust detection field.The device comprises a fixing seat and a wind power mechanism.The wind power mechanism is driven to work by the wind power, the dredging mechanism blows air to the hole part of the filter screen, dust blocked in the hole of the filter screen is blown out, and the filter screen is effectively cleaned by cooperating with the cleaning brush, so that the filter screen is prevented from being blocked, outside air cannot enter the detection cylinder, the air intake efficiency is ensured, the quality and efficiency of dust detection in the air are ensured, water in the management ring intermittently sprays out through the water spraying hole to form water mist, the water mist enters the outside environment along with the air under the action of the air discharged by the fan blade, dust in the outside environment air is condensed, the mass of the dust is increased, the dust falls to the ground under the action of gravity, the content of the dust in the air is reduced, and personnel are well protected.