54 results about "Black smoke" patented technology

The invention discloses a self-adaptive wide-range adjustment low-emission internal combustion type emptying ignition device and a control strategy. The self-adaptive wide-range adjustment low-emission internal combustion type emptying ignition device comprises an incineration tower barrel, a main combustor, an ignition / fire detector, a main fuel gas process, an ignition gas process, an emergency emptying process, a wind barrier, an electric air door, an inspection manhole, a movable base, an emission monitoring system and an intelligent control system. The internal combustion type emptying ignition device adopts a closed design, so that open fire and black smoke are avoided during combustion; the cylinder body and the base are designed in a split manner, so that the transportation is convenient, and the universality of different working places is realized; the main combustor adopts a double-layer low-nitrogen combustion design, and self-adaptive wide-range adjustment can be realized according to the air release amount; the burner nozzle is provided with the low-nitrogen injection spray pipe, mixed combustion can be promoted, and low-nitrogen and low-carbon emission is achieved. The ground torch meets different requirements of industries such as petroleum drilling, natural gas extraction and chemical engineering, and can completely solve the problems that an existing ground torch technology is low in processing capacity and difficult to adapt to different working conditions, flames are prone to emerging out of a barrel, the combustion efficiency is low, and the environment is polluted and residents are disturbed.

The invention provides a black smoke generation control method for Ringelmann blackness detection equipment, and relates to the field of environment monitoring. Comprising the following steps: acquiring a to-be-calibrated Ringelmann blackness sub-grade, and configuring the concentration of black smoke simulation liquid based on the to-be-calibrated Ringelmann blackness sub-grade and a total grade; matching the Ringelmann blackness sub-grade to be calibrated with reference grades in the first grade set and the second grade set respectively; if the Ringelmann blackness sub-grade to be calibrated is matched with any reference grade in the corresponding grade set, the black smoke simulation liquid is controlled to enter the corresponding generation sub-device, and the corresponding generation sub-device is started to generate black smoke with the corresponding concentration; and obtaining the gray whiteness ratio of the black smoke with the first concentration or the second concentration detected by the camera, and adjusting the first generation sub-device or the second generation sub-device based on the gray whiteness ratio. According to the method, black smoke with the corresponding concentration is generated by configuring the concentration of black smoke simulation liquid and selecting a proper generation sub-device, and adjustment is performed according to the grey whiteness proportion, so that accurate calibration of Ringelmann blackness detection equipment is realized.

The application discloses an air intake flow control method and device, electronic equipment and a storage medium. The method comprises the following steps: monitoring the air flow in real time through an air flow sensor and monitoring the pressure difference before and after the filter screen in real time through a pressure difference sensor; determining the pressure difference threshold corresponding to the current air flow based on a preset first corresponding relationship between the air flow and the pressure difference threshold; when the current pressure difference corresponding to the current air flow is less than or equal to the pressure difference threshold, determining the first flow compensation value corresponding to the current pressure difference based on a preset second corresponding relationship between the pressure difference and the flow compensation value, and compensating the current air flow based on the first flow compensation value. Thus, when there is foreign matter in the filter screen in the existing steady flow pipe, the pressure difference changes greatly, the measured air intake flow is less accurate, and the problems of black smoke and insufficient power of the vehicle are caused.

1. The name of the design product: oil smoke purification equipment (black smoke smoked fruit oven tar smoke BDGS-16-2.2K). 2. The use of the design product: the design product is suitable for tail gas treatment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model belongs to the technical field of garbage treatment, and particularly relates to garbage drying equipment for a garbage incineration power plant, a compression assembly and a drying assembly are matched, when garbage is dried, the garbage can be firstly compressed, after water in the garbage is discharged, a closed space is directly formed, and hot air is input; therefore, the garbage can be dried, the garbage can be more suitable for follow-up garbage incineration, and black smoke generated during combustion is reduced. And by arranging the adjusting assembly, drying of the garbage can be further improved, and the situation that due to the fact that the density of the compressed and drained garbage is too large, hot air cannot effectively flow for drying is avoided.

A method for preventing overspeeding and black smoke emission from a four-stroke marine engine under all operating conditions is disclosed, relating to the field of four-stroke marine engine control technology. This method addresses the problem of existing technologies failing to achieve full-condition fuel quantity limitation and exhibiting low control precision, leading to black smoke emission from the engine. The method involves collecting a 4-20mA current signal corresponding to the boost air pressure as the main engine load feedback signal; connecting this signal to the electronic speed controller via a shielded anti-interference link; setting fuel quantity limitation parameters according to eight speed ranges and at least eight load points in each range within a speed range of 200-1080 r / min and a boost air pressure range of 10-200 kPa, and periodically calibrating these parameters; dynamically adjusting the fuel supply using a PID control algorithm to predictively prevent speed deviations; and incorporating an abnormal alarm and a local + cloud encrypted storage module. The beneficial effects are: ensuring the engine speed remains stable within a safe range and avoiding black smoke emission caused by excessive fuel quantity under different operating conditions.

The utility model discloses a kind of gasification firewood stove, the gasification firewood stove includes stove body with stove door, chimney, ash receiving box, fire ring and grate;Stove body is provided with hearth and ash hole inside;Chimney is arranged on the side wall of stove body and is communicated with hearth;Ash receiving box is inserted in ash hole and is located below grate;Fire ring includes inner fire ring and outer fire ring;Inner fire ring and outer fire ring are spaced apart and side edge sealing connection are set;Inner fire ring is set above grate, and a plurality of air holes are set on the upper portion side wall of inner fire ring;The interval space of inner fire ring and outer fire ring is communicated with ash hole;The utility model gasification firewood stove is set air hole on the upper surface of inner fire ring, high-temperature flue gas enters between inner fire ring and outer fire ring from air hole, and secondary combustion is carried out with oxygen inside, realize the full combustion of fuel and reduce the emission of black smoke, improve thermal efficiency and reduce flue gas emission, to achieve the effect of energy saving and emission reduction.

The application provides a double-cross limiting amplitude combustion proportion control method. The system obtains an air flow setting value SPoutair=MAX[SPgas, PVgas]*R according to cross limiting amplitude calculation; the system obtains a gas flow setting value SPoutgas=MIN[PVair / R, SPgas] according to cross limiting amplitude calculation; the system also introduces oxygen concentration control analysis, calculates an air-fuel ratio R according to an oxygen concentration setting value SPo2 and an oxygen concentration actual value PVo2, and replaces the initial setting value of the air-fuel ratio R. When the gas demand changes sharply, the gas and air can be ensured to rise / drop proportionally from the current stable flow, and the air amount is always slightly more than the gas amount, so that the combustion is ensured to be sufficient. When the air amount is insufficient, the gas amount can be ensured to be not excessive, so that the insufficient combustion to produce black smoke is avoided. When the gas amount is insufficient, the air amount can be ensured to be not excessive, so that the excessive air is avoided to enter and cause energy waste.

To provide a fire detector, a disaster prevention facility, and a fire detection method that enable rapid and appropriate fire detection according to an identified type of smoke.SOLUTION: In a disaster prevention facility, a signal detection unit 16 of a detector 12 detects multiple signals as optical effects, such as scattering caused by detection targets like smoke or steam within a monitored area, using multiple optical settings. An identification unit 18 identifies a type or cause of detection targets, such as white smoke, black smoke, or steam, based on the ratio of the multiple signals. A fire detection unit 20 detects a fire when predetermined fire detection conditions are met based on at least one of the multiple signals. Furthermore, fire detection conditions are modified according to the identification results such as white smoke, black smoke, and steam determined by the identification unit 18.SELECTED DRAWING: Figure 1

The invention discloses a fire smoke concentration calculation method and system and a fire detector, and belongs to the technical field of fire detection. Firstly, to-be-detected fire smoke is classified, and the influence of interference smoke on fire smoke physical parameter prediction is eliminated; after the influence of interference smoke is eliminated, the physical parameters of black smoke and white smoke are different, and a corresponding pre-trained multi-parameter regression model is adopted to predict the physical parameters, so that the particle shape parameters and particle size distribution of the to-be-detected fire smoke can be accurately obtained; and the fire smoke concentration of the to-be-measured smoke can be accurately calculated. The method breaks away from a traditional fire smoke concentration calculation method, a finer concentration calculation mode is provided, and the calculation accuracy of the fire smoke concentration is improved.

The utility model provides an automatic opening and closing actuating mechanism of a black smoke particle trap bypass valve, which comprises a box body and a bypass valve, the bypass valve is arranged on a partition plate, and the bypass valve comprises a valve cylinder fixedly arranged on a corresponding through hole of the partition plate, a valve plate arranged corresponding to the valve cylinder, and an actuating mechanism for driving the valve plate to rotate. The interior of the box body is divided into the purification chamber and the flow guide chamber through the partition plate, the bypass valve is installed on one side of the partition plate to conduct the purification chamber and the flow guide chamber for pressure relief and exhaust, and unsmooth exhaust caused by blockage of the filter element is avoided. The valve plate is connected with the rotating shaft through the elastic seat, the sliding block in the elastic seat moves directionally, and under the action of the first spring, the valve plate can elastically move by a certain amplitude, so that rigid contact between the valve plate and the valve cylinder is avoided, and the attaching sealing performance when the valve plate and the valve cylinder are closed is improved.

The utility model discloses an active air supply type ground torch system which comprises a combustion device and an external automatic blower device. The combustion device comprises a combustion chamber and a flare gas pipeline communicated with the combustion chamber, and a plurality of combustors are arranged in the combustion chamber; the automatic blower device comprises an air blower and a ventilation pipe, and the ventilation pipe comprises an air inlet channel connected with the air blower and an air outlet channel formed by extending into the combustion chamber; the air outlet channel is provided with an air outlet, and air enters through the air inlet channel and is introduced into the combustion chamber through the air outlet. The mode that air is actively supplied to the center of the combustion chamber is adopted, so that air is easily obtained in the center of the combustion chamber, flare gas is fully combusted, the defect of insufficient combustion caused by insufficient oxygen in the center of the combustion chamber during combustion of a traditional ground flare is effectively overcome, the combustion efficiency is improved, and the problems of black smoke emission, flash explosion and the like caused by insufficient combustion are solved. And the mode of blowing air into the combustion chamber is adopted, so that the distance between the combustors is reduced, and the occupied area is reduced.

The application provides a black smoke generation control method for a Lignermann blackness detection device, and relates to the field of environmental monitoring. The method comprises the following steps: obtaining a to-be-calibrated Lignermann blackness sub-grade; configuring the concentration of black smoke simulation liquid based on the to-be-calibrated Lignermann blackness sub-grade and the total grade; matching the to-be-calibrated Lignermann blackness sub-grade with reference grades in first and second grade sets respectively; if the to-be-calibrated Lignermann blackness sub-grade matches any reference grade in the corresponding grade set, controlling the black smoke simulation liquid to enter the corresponding generation sub-device, and starting the corresponding generation sub-device to generate black smoke with the corresponding concentration; obtaining the gray-white ratio of the first or second concentration black smoke detected by the camera; and adjusting the first or second generation sub-device based on the gray-white ratio. The method generates black smoke with the corresponding concentration by configuring the concentration of the black smoke simulation liquid and selecting the appropriate generation sub-device, and adjusts according to the gray-white ratio, thereby realizing the accurate calibration of the Lignermann blackness detection device.

The utility model provides ground torch equipment, which belongs to the technical field of solid waste recovery treatment and comprises a plurality of combustors, an air distribution pipeline, an exhaust gas pipeline, a water-sealed tank and a heat shield. The combustor is used for carrying out combustion treatment on the discharged combustible gas; an air outlet of the air distribution pipeline is connected with the combustor and supplies oxygen to the combustor; a gas outlet of the exhaust gas pipeline is connected with the combustor and conveys exhausted combustible gas to the combustor; the water-sealed tank is connected with a gas inlet of a gas discharging pipeline; a containing space is defined by the heat insulation cover and used for containing the combustor. The utility model solves the technical problem that black smoke is difficult to burn completely in the existing torch equipment, and has the characteristics of ensuring that hydrocarbons in the torch equipment are completely burnt and realizing low-noise smokeless combustion.

The application provides a ship black smoke event monitoring method and system. The method comprises the following steps: acquiring a ship video stream, performing normal interval identification on the ship video stream at a first time interval based on a black smoke identification algorithm; in response to identifying a black smoke frame, recording a current first time, and performing interval encryption identification on the video stream at a second time interval based on the black smoke identification algorithm; in response to the continuous duration of the interval encryption identification no longer identifying the black smoke frame satisfying a third time interval, recording a current second time; and determining whether to generate black smoke event alarm information based on the ship video stream from the first time to the second time, and outputting the result. The method provided by the application enhances the reliability and monitoring effect of ship black smoke monitoring.

The utility model provides an obstacle removing device for an overhead transmission line of a wind power plant. The wind power plant overhead transmission line obstacle removing device comprises a supporting piece, a shielding assembly and a cleaning assembly, the shielding assembly comprises a first shielding piece, the first shielding piece is fixedly connected with the surface of one side wall of the supporting piece through a connecting block, a second shielding piece is arranged on one side of the first shielding piece, and the second shielding piece is fixedly connected with the surface of one side wall of the supporting piece. Through grooves are formed in the surfaces of the sides, close to each other, of the first shielding piece and the second shielding piece, the two through grooves are matched, and lug plates are fixedly connected to the surfaces of the side walls, facing the supporting piece, of the first shielding piece and the second shielding piece in a vertically symmetrical mode; the obstacle clearing device for the overhead transmission line of the wind power plant has the advantages that flames of a flame projector and black smoke generated by combustion can be prevented from polluting the whole equipment, and meanwhile, the burnt high-voltage line part can be cleared more carefully.

The invention provides a marine diesel engine test run black smoke treatment device which is characterized by comprising a device shell, the device shell comprises an anechoic chamber located on the lower portion and a filter chamber located on the upper portion, the filter chamber is communicated with the anechoic chamber, and an air inlet is formed in one side face of the anechoic chamber; a filter chamber is arranged in the device shell, a plurality of metal filter elements are distributed in the filter chamber, the axial direction of the metal filter elements is the vertical direction, black smoke dust is intercepted by the outer surfaces of the metal filter elements, filtered gas is contained in the metal filter elements, an air outlet is formed in the top of the filter chamber, and a pulse injection system is arranged above the device shell and connected with the filter chamber. According to the marine diesel engine test run black smoke treatment device, the problems that an existing device is complex in structure, filtering materials are not easy to clean, noise is large, and operation and maintenance are difficult are solved.

The invention discloses a complex scene-oriented ship black smoke detection method and system, and the method comprises the steps: constructing a ship black smoke data set containing different weather conditions, and carrying out the image enhancement preprocessing through an adaptive histogram equalization method; on the basis of a YOLOv5s model, a detection head of the YOLOv5s model is replaced by a dynamic detection head comprising a scale perception attention module, a space perception attention module and a task perception attention module, a cross-dimension feature fusion module is added in a Neck network, and a loss function is replaced by an MPDIOU loss function based on the minimum point pitch intersection-to-union ratio; and training and evaluating the improved model by using the preprocessed data set. According to the method, the detection precision and robustness of the model on the ship black smoke in complex weather and multi-scale scenes are effectively improved, the recognition capability on small targets and diffusion form black smoke is enhanced, and reliable technical support is provided for ship emission monitoring.

The utility model discloses equipment of a dual heating system additionally arranged at a furnace temperature, which comprises a coal gas main pipe, a first branch pipe, a second branch pipe, a first coal gas exchange valve, a supply pipe and a condenser pipe, and the first branch pipe with a communicated structure is welded on the rear side of the lower end of the coal gas main pipe; a second branch pipe of a communicating structure is welded to the right side of the lower end of the gas main pipe, and the first branch pipe and the second branch pipe are of an up-down staggered structure. The two branch pipes are arranged at the lower end of the main gas pipe, and the gas exchange valves are arranged on the branch pipes, so that a dual heating effect is formed, the heating temperature is improved, the phenomenon that the carbonization chamber collapses due to too low temperature is avoided, the phenomena of coke collapse, black smoke and the like are reduced after the temperature is improved, and the service life of the carbonization chamber is prolonged. The lower end of the coal gas main pipe is provided with the water drainage pipe which is of a communicating structure, the water drainage pipe flows into the condensation pipe, and the flow dividing pipes are installed at the bottoms of the two branch pipes, so that the problem that coal gas contains water is solved.

The utility model discloses a general type external filtering and purifying system for engine tail gas. The general type external filtering and purifying system comprises a mixing box, a cooling box, a filtering module, a heating pipe, a fan, a bypass pipe and a control system. The device is high in purification efficiency, convenient to use and maintain, small in size, low in power consumption, high in universality, and capable of effectively purifying harmful carcinogenic tail gas containing black smoke particles generated when diesel engines and gasoline engine equipment operate in a closed environment, especially in the plateau environment with thin oxygen content and low temperature throughout the year. High-concentration harmful tail gas can be effectively purified, and the harm of the tail gas to the body health of maintenance workers in a workshop is eliminated; the device is suitable for maintenance workshops, rear warehouses and other space closed places, is suitable for equipment with the displacement smaller than 15 liters or the power smaller than 350 Kw, and can reduce tail gas emission and prevent a target from being exposed when the equipment is arranged in an array fixed fortification.

The utility model discloses an energy-saving building material fireproof performance testing device, and belongs to the field of building material detection. An energy-saving building material fireproof performance testing device comprises a supporting arm and further comprises a supporting table fixedly arranged on the supporting arm; the circular plate is fixedly arranged on the supporting table; the annular groove is formed in the circular plate; the placing table is fixedly arranged on the circular plate; the flame gun is arranged on the placing table; the clamping assembly is used for fixing the building materials and is arranged on the placing table; the plurality of air inlets are circumferentially formed in the circular plate; according to the device, black smoke generated after part of building materials are burnt is effectively prevented from being attached to the glass cover, extracted gas is filtered through the filter box, gas generated by testing is effectively prevented from polluting air, and the situation that the building materials are cooled due to the entering gas and the efficiency of the fireproof testing is affected is effectively prevented.

The utility model relates to the technical field of carbonization furnaces, and discloses a gas-carbon co-production device of agricultural and forestry wastes, which comprises a heating cabin, a carbonization cabin is fixedly connected in the heating cabin, one side of the carbonization cabin is movably connected with a cabin door, and the carbonization cabin is fixedly connected with a first exhaust pipe and extends to the upper part of the heating cabin. A water seal tank is fixedly connected to the position, close to the first exhaust pipe, of the heating bin, one end of the first exhaust pipe is connected with the input end of the water seal tank through a pipeline, and a centrifugal tar filter is arranged on one side of the heating bin and further comprises a filter cartridge. Combustible gas generated in the carbonization process enters the centrifugal tar filter after being subjected to preliminary tar removal through the water seal tank, the motor drives the separation tank to rotate, the combustible gas is pushed to the activated carbon plate through centrifugal force, fine tar particles are adsorbed, the cleanliness of the combustible gas is greatly improved, the purified gas flows back to the combustion pipe to be combusted, pipeline blockage is avoided, and the combustion efficiency is improved. And combustion is more sufficient, black smoke peculiar smell is reduced, and the heat utilization rate is increased.

This invention discloses an automatic identification method and system for vessels emitting black smoke, aiming to solve the problem of rapid and accurate identification of such vessels. The method includes: recording initial parameters of a zoomable camera and acquiring channel video; capturing black smoke events using a multi-feature fusion black smoke detection algorithm; adjusting the camera via PID control and recording the vessel's 30-second navigation trajectory and heading; and filtering and matching identity information based on an "AIS + hull coding" dual-modal system, combined with vessel quantity and heading, supplemented by trajectory similarity and size error constraints to improve accuracy. The system includes modules such as a zoomable camera, an AI computing power unit, and a controller, integrating black smoke detection, trajectory tracking, identity matching, and data uploading. This invention achieves automatic identification of vessels emitting black smoke with strong real-time performance and high accuracy, enabling rapid evidence collection and providing technical support for channel vessel supervision.

The utility model provides an elevated torch air smoke abatement torch head, and relates to the technical field of torch heads, a separation cylinder is an annular cylinder with an upper opening and a lower opening, the top end of a settable air inlet pipeline is sleeved in the separation cylinder, and a gas mixing space is reserved above the settable air inlet pipeline in the separation cylinder. Through the arrangement of the separation cylinder, the gas entering the pipeline is primarily premixed with the air entering the channel inside the separation cylinder, the premixed gas and the air in the channel between the separation cylinder and the housing are secondarily mixed at the top of the separation cylinder, and the air is added into the gas for several times; air can be fully mixed in the set-off air, the air is uniformly distributed in the set-off air, and the air is easily and completely combusted during combustion, so that the incomplete combustion phenomenon caused by insufficient oxygen is reduced, the generation of black smoke is reduced, the black smoke emission can be radically reduced, the condition of using steam is omitted, and high efficiency and energy conservation are realized.

This application relates to a smoke suppression and cooling device, specifically in the field of power generation equipment for civil defense fortifications. It includes a support frame and at least two air ducts mounted on the frame. Each air duct is connected to the exhaust pipe of a diesel generator. Each air duct contains a particulate trap, with mounting rings fitted at both ends. Each air duct contains two retaining rings, each connected to the air duct by a support spring. The support spring pushes the two retaining rings closer together, allowing the particulate trap to be inserted between the two retaining rings. The mounting rings are inserted into and abut against the retaining rings. This application effectively removes black smoke from exhaust gases, improving the concealment of civil defense fortifications during wartime.

The utility model provides a generator set black smoke purification device which comprises a main box body and a flow guide box arranged at the upper end of the main box body, the interior of the main box body is divided into an air inlet chamber and an air outlet chamber through a partition plate, one side of the flow guide box is communicated with the air outlet chamber through a first pipeline, and the other side of the flow guide box is connected with the air inlet chamber through a second pipeline. And a bypass valve for controlling connection and disconnection is arranged on the second pipeline. The first ring body and the second ring body are connected with the filter element, the filter element is positioned through the conical surface, and the sealing performance is improved through taper fit. And the spring pushes the elastic plate to rise so as to extrude and clamp the filter element. The clamping mechanism is used for controlling the elastic plate to descend, the pressing plate presses the roller downwards to drive the elastic plate to descend, and the limiting piece is used for fixing the pressing rod, so that workers can disassemble and assemble the filter element conveniently. The device is easy to operate, the filter element can be disassembled and assembled more quickly, and the working efficiency is improved.

The invention provides a ship black smoke event monitoring method and system. The method comprises the following steps: acquiring a ship video stream, and performing interval-by-interval normal state identification on the ship video stream at a first time interval based on a black smoke identification algorithm; in response to the identified black smoke frame, recording a current first moment, and carrying out interval-by-interval encryption identification on the video stream at a second time interval based on the black smoke identification algorithm; recording a current second moment in response to the condition that the continuous duration of the black smoke frame is not identified by the interval-by-interval encryption identification to meet a third time interval; and judging whether black smoke event alarm information is generated or not based on the ship video stream from the first moment to the second moment, and outputting a result. According to the method provided by the invention, the reliability and the monitoring effect of ship black smoke monitoring are enhanced.

This utility model provides a device for controlling black smoke during marine diesel engine testing. Its features include: a housing comprising a lower silencing chamber and an upper filter chamber, which are connected; an air inlet is located on one side of the silencing chamber; multiple metal filter elements are distributed within the filter chamber, with the axial direction of the filter elements being vertical; air enters from the sides of the metal filter elements and exits from the top; an air outlet is located at the top of the filter chamber; and a pulse jet system is located above the housing and connected to the filter chamber. This utility model's device for controlling black smoke during marine diesel engine testing overcomes the problems of existing devices, such as complex structure, difficulty in cleaning filter materials, high noise levels, and difficult maintenance.

The utility model discloses DPF (diesel particulate filter) black smoke particle filtering equipment, which belongs to the technical field of DPF black smoke particle filtering, and adopts the technical scheme that the DPF black smoke particle filtering equipment comprises an equipment body, a heating mechanism is arranged on the surface of the equipment body, a filtering mechanism and an exhaust pipe are arranged on the front side of the equipment body, and a protective frame is arranged on the surface of the exhaust pipe; the filtering mechanism comprises a connecting frame, a fixing frame, a connecting sleeve, a rubber sleeve, a sealing block, a cyclone separator and a sealing groove, and the problems that when tail gas is filtered through existing DPF black smoke particle filtering equipment, large particulate matter in the tail gas enters the DPF black smoke particle filtering equipment, the filtering load of the DPF black smoke particle filtering equipment is likely to be increased, and the filtering efficiency of the DPF black smoke particle filtering equipment is affected are solved. The problems that in the DPF regeneration process, a large amount of fuel oil is needed for combusting diesel particulate matter, fuel oil economical efficiency is reduced, the regeneration period is prolonged, and the overall filtering efficiency of the DPF can be reduced are solved.

The invention discloses a diesel vehicle emission smoke intensity grade identification method based on an improved OTSU algorithm, and the method comprises the following steps: collecting a diesel vehicle tail gas black smoke image, carrying out the graying processing of the image, and carrying out the denoising processing of the gray image through Gaussian filtering; traversing a [0, 255] gray interval based on an improved OTSU algorithm, determining double thresholds by maximizing between-class variance, and segmenting the image into a heavy-level black smoke region, a light-level black smoke region and a background region; establishing a weight calibration mechanism, fitting the blackness values of the heavy-grade black smoke area and the light-grade black smoke area by adopting a least square method to obtain a weight calibration coefficient, and carrying out weighted calculation to obtain a blackness value; and comparing the blackness value with a Ringelmann blackness grade standard, and determining the smoke intensity grade.