CN117629303A - Tunnel dust concentration measurement and spray dust removal test system and method - Google Patents
Tunnel dust concentration measurement and spray dust removal test system and method Download PDFInfo
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- CN117629303A CN117629303A CN202311669897.2A CN202311669897A CN117629303A CN 117629303 A CN117629303 A CN 117629303A CN 202311669897 A CN202311669897 A CN 202311669897A CN 117629303 A CN117629303 A CN 117629303A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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Abstract
The invention relates to a tunnel dust concentration measurement and spray dust removal test system and a method, wherein the system comprises the following steps: the test box comprises a box body, a box body supporting column, a front panel, a back panel, an inner partition board, a crank handle, dust scrapes, sealing rubber plugs and shading cloth; the dust generating device comprises a dust box and a blower; the measuring device comprises a camera, light supplementing equipment, a high-precision humidity detector, light measuring equipment, a computer in communication connection with the camera and a handheld dust concentration detector; the spray dust-settling device comprises a water tank, a water pump and a spray head; the dust collecting device comprises an exhaust fan, a filtering unit and a dust collecting box. Compared with the prior art, the invention realizes non-invasive measurement of dust concentration, realizes the replacement of background images and the adjustment of the distance between the background images and a camera lens, realizes the adjustment and quantification of illumination intensity, realizes the quantitative adjustment and accurate measurement of humidity, realizes the quantitative throwing and recovery of dust, and realizes the simulation of the spraying dust-settling effect in a tunnel.
Description
Technical Field
The utility model relates to the technical field of tunnel dust monitoring and dust fall, in particular to a tunnel dust concentration measurement and spray dust removal test system and method.
Background
Under the background that the traditional drilling and blasting method has large construction noise, large vibration and high construction cost and poor geological adaptability of the shield method; the integrated cutting, loading, transporting and dust removing technology of the cantilever heading machine is widely applied to urban underground space construction engineering. However, the cantilever heading machine always continuously generates larger dust when facing hard rock, and influences the visibility near the face so as to influence the construction precision and efficiency, and the cantilever heading machine also can damage the health of operators, thereby possibly causing bad personal injury and economic loss. Therefore, the method has important significance for developing related researches on the monitoring means of dust concentration in the excavating process of the cantilever excavator.
At present, an ultrasonic method or a light scattering method is mostly adopted for a dust concentration monitoring method and a model device, a novel strain method is adopted, and related exploration is carried out on an image method by the existing part of patents, but the defects still exist. For example, patent CN116223325a discloses a method for determining dust content by blowing dust-containing gas to a strain gauge through a dust blower and determining dust content through resistance change of the strain gauge, patent CN216847379U discloses a dust concentration detecting device using a laser detecting body, and the like, in patent CN115468885a, the laser method is used for measuring, the possibility of pollution by dust particles is reduced after a detecting light path and a gas flow to be detected are isolated, patent CN219120191U samples dust and enters a cavity and then uses an image method for measuring, and the patent CN219120191U adopts different methods for measuring dust concentration and enhances precision or anti-interference capability in different aspects, but can be generalized into invasive measurement, and the distribution of dust in space is disturbed, which may affect subsequent further researches. A non-invasive image method is disclosed in patent CN116559037A, a high-speed camera and a dynamic measurement method of a dust concentration sampling instrument are provided for dust concentration in an explosion area of an open pit mine, patent CN110532511A calculates a gray-rank symbiotic matrix and moment of inertia of a plurality of groups of dust images with standard concentration gradients to construct a mathematical model between dust concentration and moment of inertia, patent CN102445409A monitors the livestock and poultry raising environment and utilizes a camera to collect dust images for analysis to obtain a relation model between dust concentration and image brightness parameters, and patent CN112945511A researches a dust generation simulation mode, environment experiment performance and a spraying device effect. The patent adopts different methods such as image gray level, brightness and the like to carry out regression on dust concentration to obtain a relation model, and partially explores the effect of the spraying device, but the background is relatively fixed, the influence of the measured distance on the image characteristics is not explored, the image characteristics under different illumination conditions, different humidity and complex background are not explored, and the spraying dust-settling effect is not further studied.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a tunnel dust concentration measurement and spray dust removal test system and method, which realize non-invasive measurement of dust concentration, realize background image replacement and distance adjustment between a camera lens, realize illumination intensity adjustment and quantification, realize quantitative adjustment and accurate measurement of humidity, realize quantitative feeding and recovery of dust, realize simulation of spray dust reduction effect in a tunnel and realize dust overflow control.
The aim of the invention can be achieved by the following technical scheme:
the dust concentration is measured by using an image method, the influence of the measured distance on the image is demonstrated, meanwhile, the influence research is carried out by changing the humidity through introducing wet air into the humidifier, the spray dust suppression effect research is realized by changing the spray nozzle, the measurement calibration under the complex background can be carried out by changing the background image on the inner movable partition plate, and the measurement calibration under the complex light source condition can be realized by changing the shading state and the LED light source state.
The invention provides a tunnel dust concentration measurement and spray dust removal test system, which comprises:
The test box comprises a box body, a box body supporting column, a front panel, a back panel, an inner partition board, a crank handle, dust scrapes, sealing rubber plugs and shading cloth; the box body is arranged on the box body support column; the front panel and the back panel are connected with the box body in a sealing way; the inner partition board is arranged in the box body, the periphery of the inner partition board is connected with the box body in a sealing way, and further, a rubber ring is arranged on the contact surface of the inner partition board and the box body, or vaseline is smeared at a joint after the inner partition board is in direct contact with the box body; the crank handle penetrates through the side opening of the box body, and the crank handle is in sealing connection with the box body through a rubber ring; the dust scraper penetrates through the opening of the front panel and is in sealing connection with the front panel, and is in sealing connection with the front panel through a rubber ring; the sealing rubber plug is plugged into the top opening of the box body; the shading cloth cover is arranged outside the box body; the shading cloth is covered outside the box body and used for weakening the influence of ambient light, so that regular research under simple illumination conditions is facilitated, and complex ambient light can be introduced as an influence factor after the shading cloth is removed;
the dust generating device comprises a dust box and a blower, and the dust box is connected with the blower; the blower blows the dust in the dust box into the box body through the air inlet of the blower;
the humidity control device comprises a water tank, a humidifier and a Bluetooth humidity monitor; the water tank is connected with the humidifier through a first hose; the humidifier steam outlet is connected with a socket fitting through a first hose; the Bluetooth humidity monitor is adhered to the inner wall of the box body;
The measuring device comprises a camera, light supplementing equipment, a high-precision humidity detector, a light measuring equipment, a computer in communication connection with the camera and a handheld dust concentration detector; the camera is arranged outside the box body, the light supplementing equipment is arranged on the front panel in the box body, the light supplementing equipment is connected with the front panel in a glue way, and the power supply line runs out from an opening on the contact surface of the light source and the box body; the detection parts of the high-precision humidity detector, the light intensity detector and the handheld dust concentration detector are all arranged on the crank handle, and further, the detection parts of the high-precision humidity detector, the light intensity detector and the handheld dust concentration detector are respectively arranged at the upper diameter and the lower diameter of the crank handle, and the power supply line and the reading part of the handheld dust concentration detector walk out from the hollow part of the crank handle; preferably, the light measuring device is a light intensity detector, and the light supplementing device is an annular LED light source;
the spray dust-settling device comprises a water tank, a water pump and a spray head; the water tank is connected with the water pump through a second hose, the water pump is connected with the socket fitting through the second hose, and the spray head is connected with the socket fitting and is arranged on the inner side of the tank body;
the dust collecting device comprises an exhaust fan, a filtering unit and a dust collecting box; the air inlet of the exhaust fan is connected with the air outlet of the box body, the air outlet of the exhaust fan is connected with the filtering unit, and the dust discharging port of the filtering unit is connected with the dust collecting box.
Furthermore, the box body is a transparent acrylic cylinder, and the front panel and the back panel are acrylic circular plates corresponding to the opening size of the cylinder;
the joint surfaces of the front panel and the back panel and the cylinder are provided with circumferential grooves, the circumferential grooves are provided with sealing rings, the upper openings of the sealing rings are provided with outward upper opening reverse edges, the upper opening reverse edges are provided with air holes, the lower openings of the sealing rings are provided with buckles, the buckles are matched with the lower openings of the front panel and the back panel, and sealing can be realized when the buckles are locked; the front panel is provided with a hole, the dust scraper is penetrated in the hole, and a rubber ring is arranged between the dust scraper and the hole; the box body is provided with an air inlet hole and an air outlet hole;
one side of the box body is provided with a hole, the crank handle is penetrated in the hole, and the joint of the crank handle and the box body is sealed by rubber; the hand crank comprises three hollow handles penetrating through the sleeve structure of the box body and three semicircular rings connected with the hollow handles respectively, the hollow handles are arranged outside the box body, the semicircular rings are arranged in the box body, the hollow handles can drive the semicircular rings to rotate, and the hand crank is used for moving the photometry equipment, the high-precision humidity detector and the handheld dust concentration detector to a designated position for measurement;
the inner partition plate is a transparent acrylic circular plate, is expanded into a triangular cone shape at the periphery and is used for stabilizing the inner partition plate in the cylinder, a rubber sealing ring is used on the side of the conical bottom surface or vaseline is additionally coated for sealing, and when the back plate is used as a background image carrier, the inner partition plate is used for changing the volume and sealing of a dust space; when the backboard is not used as a background image carrier, one side of the inner partition board is stuck with an image to be measured as a background, the volume of dust distribution space in the box and the distance between the background to be measured and the camera can be changed by changing the position of the partition board, the box space in which the dust is distributed is a dust cavity, and the rear space of the inner partition board without the dust is an isolation cavity.
Further, an air inlet one-way valve is arranged between the air inlet of the blower and the air outlet of the box body, and the air inlet one-way valve is used for providing a relatively stable environment and preventing dust from flowing back into the blower during measurement; the dust box is arranged at the air inlet of the air blower and is provided with a dust-throwing sealing baffle plate, the dust-throwing sealing baffle plate separates the dust to be thrown in the dust box from the air blower before starting a test, and the dust-throwing box is convenient for adding and subtracting the dust to be thrown; the dust generation device controls the dust uniformity by the power and the time of the blower, and controls the average dust concentration in the box body by the quantity of the dust in the dust box.
Further, the humidifier pumps water from the water tank through the first hose, atomizes the water into water mist, and sends the water mist into the box body at the sealing rubber plug through the pipe; the sealing rubber plug can realize the sealing with the humidifying pipeline by replacing the socket fitting; the Bluetooth humidity monitor is used for monitoring the humidity in the box body in real time so as to determine whether water mist is continuously introduced; through bluetooth humidity monitor and humidifier cooperation, realize the inside humidity control and the stability of box.
Further, the camera is used for shooting images in the box body; the light supplementing device is adhered to the inner wall of the box body through strong adhesive; when the image to be measured is positioned on the inner partition plate, the light measuring equipment is connected with the semicircular ring, the high-precision humidity detector is connected with the semicircular ring, and the hollow handle is rocked to enable the semicircular ring to rotate, the light measuring equipment is used for measuring the emission intensity of the light source and the illumination intensity before the background, and the high-precision humidity detector is used for measuring the humidity in the dust cavity in the box body and the humidity in front of the inner partition plate respectively; when the image to be measured is positioned on the backboard, the high-precision humidity detector respectively measures the humidity in the dust cavity in the box body and the humidity in front of the backboard; the handheld dust concentration detector comprises a probe part and a display processing part, wherein the probe part is connected with the semicircular ring, the display processing part is arranged outside the box body, a data transmission line is transmitted from the hollow handle to the display processing part, and the handheld dust concentration detector is used for measuring and calibrating under various dust conditions; the computer is used for receiving and processing the dust image information collected from the camera, and carrying out data analysis and fitting.
Furthermore, the spray dust suppression system explores the spray dust suppression effect of different factors by adjusting the form of a spray head, the pressure and the flow of a water pump and adjusting the particle size and the range of sprayed liquid drops; the spray head is arranged in the sealing rubber plug and is connected with the water pump through a second hose; the water pump can carry out spray adjustment by adjusting the water pressure and flow; the water pump obtains the liquid used to form the droplets from the tank.
Further, the exhaust fan is connected with an air outlet hole at the bottom of the box body, and a sealing baffle is arranged between the exhaust fan and the air outlet hole; the filtering unit is connected with the air outlet of the exhaust fan and is used for filtering the extracted dust to avoid polluting the environment; the dust collecting box is connected with the filtering unit and is used for collecting and filtering the obtained dust for weighing and putting the dust into the dust again for testing; the dust collecting device also comprises an optional hose and a dust collection head which are connected, and when dust is difficult to directly withdraw, the hose and the dust collection head are used for collecting dust from a designated part in the box body.
Further, the box body is an integrally formed barrel or a spliced barrel sealed by glass cement; sealing measures such as a one-way valve and a sealing partition plate are arranged at each opening of the box body, and the air tightness is required to be checked before the test is started.
The invention also provides a tunnel dust concentration measuring method, which comprises the following steps:
a1: checking the air tightness of a test box, wherein the box body space in which dust is distributed is a dust cavity, the rear space of a dust-free inner partition board is an isolation cavity, determining the length of the dust cavity, moving the inner partition board to a designated position, pasting a background image, selecting the type and quality of the dust to be put into a dust box, and covering with shading cloth;
a2: turning on a Bluetooth humidity monitor of a humidity control device, determining whether to introduce water vapor generated by a humidifier after the initial humidity to be selected, if the water vapor is required to be introduced, disconnecting the humidifier from a sealing rubber plug and plugging an equipment hole on the rubber plug after the water vapor is required to be introduced, turning on a handheld dust concentration detector, and shaking the handheld dust concentration detector to a plurality of positions in a box body through a hand crank to perform zero calibration or initial concentration measurement, wherein if the difference between the initial dust concentration in the box body and the actual observation condition is large, the box body is required to be opened for cleaning;
a3: opening a light supplementing device of the measuring device, taking a background by using a camera, and shaking a crank handle with the light measuring device to a designated position in front of the background to measure initial light intensity;
a4: opening a blower and a dust throwing sealing baffle of the dust generating device, blowing dust into the box body through an air inlet one-way valve, closing a dust box baffle after the dust is blown and continuously blown, and waiting until the state of the dust in the box body is stable;
A5: taking a background picture with dust by using a camera, scraping a photographing window by using dust if the front panel has dust adhesion to influence image acquisition, shooting, and selecting a background image part with more uniform dust concentration as a fitting part;
a6: opening a handheld dust concentration detector, cranking the crank to enable the detection end to reach the fitting part, and measuring the dust concentration of the fitting part as fitting concentration; opening the light measuring equipment, cranking the crank to enable the light measuring equipment to reach the fitting part, and measuring the light intensity as the light intensity after dust; opening the high-precision humidity detector, shaking a hand crank to enable the high-precision humidity detector to reach a fitting part, and measuring humidity to be used as dust humidity;
a7: opening an exhaust fan, opening a sealing baffle plate, exhausting and dedusting the box body, closing the box body after no obvious dust exists in the box body, manually erasing the box body after opening a front panel or a back panel when the attached dust still cannot be extracted through exhaust, and collecting the extracted dust for recycling;
a8: image processing is carried out on the collected front and rear images of the dust of the fitting part, and corresponding data records of initial light intensity and after-dust light intensity, initial humidity and after-dust humidity, initial dust concentration and fitting concentration are carried out;
A9: after the dust concentration is replaced, the steps A1 to A8 are repeated, so that dust concentration calibration fitting under one working condition can be realized, and a concentration model under a single working condition is established between the image preprocessed in the step A8 and corresponding data;
a10: and (3) repeating the steps A1 to A9 after the initial light intensity, the dust cavity length, the background image and the like are replaced, so that the dust concentration calibration under multiple working conditions can be realized, and a dust concentration model under a complex environment is obtained.
The invention also provides a spray dust removal test method, which comprises the following steps:
b1: selecting a spray nozzle, spray pressure, spray flow rate, spray time or an intermittent spray scheme to be adopted;
b2: before the test, the light measuring equipment is started, the crank is cranked to enable the light measuring equipment to reach a measuring position, and the measured light intensity is used as the light intensity after dust; opening a high-precision humidity detector, shaking a hand crank to enable the high-precision humidity detector to reach a measurement position, measuring humidity to be used as humidity after dust, and inputting obtained data into a concentration model obtained by a tunnel dust concentration measurement test to obtain initial dust concentration in a box body;
b3: carrying out timing spraying dust removal by using the spraying data and the scheme selected in the step B1, and standing for a period of time to wait for the dust state in the box body to be restored uniformly;
B4: opening the light measuring equipment, cranking the crank to enable the light measuring equipment to reach a measuring position, and measuring the light intensity as the light intensity after dust removal; opening a high-precision humidity detector, shaking a hand crank to enable the high-precision humidity detector to reach a fitting position, measuring humidity as the humidity after dust removal, inputting the obtained data into a concentration model obtained by a tunnel dust concentration measurement test to obtain the dust concentration after dust removal in a test box;
b5: repeating steps B3, B4 if an intermittent spray scheme is used;
b6: opening an exhaust fan, opening a sealing baffle plate, exhausting and dedusting the box body, closing the box body after no obvious dust exists in the box body, manually erasing the box body after opening a front panel or a back panel when the attached dust still cannot be extracted through exhaust, and collecting the extracted dust for recycling;
b7: and comparing the initial dust concentration with the dust concentration after dust removal to obtain a dust removal effect, and analyzing the influence of water consumption and pressure.
Compared with the prior art, the invention has the following advantages:
(1) Non-invasive measurement of dust concentration is achieved: the invention adopts an image method to calibrate and fit the image characteristics and dust concentration of dust in space, thereby realizing remote and undisturbed measurement.
(2) The distance between the background image replacement and the camera lens is adjusted: the tunnel dust concentration measurement test device can replace the image content on the inner partition board or the back board as a background according to the requirement, and realizes complex background checking. The position of the inner baffle plate of the box body can be adjusted steplessly, and the superposition effect of dust spaces with different depth of field on image characteristics is explored.
(3) The adjustment and quantification of the illumination intensity are realized: the box body is covered by the shading material, the influence of ambient light is weakened, the light source adopts the LED light source, different illumination intensities can be selected, and the light intensity detector is equipped for measuring the light source intensity and the background illumination intensity under different dust concentrations.
(4) Realize the quantitative adjustment and accurate measurement of humidity: the humidity control system can quantitatively control humidity conditions in the box body, and accurate humidity readings of the to-be-measured positions are obtained through the high-precision humidity detector, so that the influence of humidity on spatial non-uniformity is reduced, and the exploration of the influence of humidity on dust concentration image characteristics is realized.
(5) Realize quantitative throwing and recovery of dust: the dust box of the dust generating device can collect dust collected on a construction site, and can carry out weighing quantification and particle size analysis in the preparation process before the test. The dust collecting device can evacuate the dust in the box body after the test is finished, collect the dust in the dust collecting box for the next test, and can obtain the test loss condition through weighing.
(6) Simulation of spraying dust fall effect in tunnel is realized: the spray dust-settling device can be matched with a non-invasive measurement means for dust concentration to quantitatively compare the spray dust-settling effects of different spray parameters.
(7) Realizing dust overflow control: according to the invention, the airtight inspection of the cylinder body is required before the test, the operation of each airtight part is required to be kept in the test process, and free dust in the box body is extracted by using air suction dust removal and filtered and collected after the test is finished, so that no free dust overflows in all stages to cause environmental pollution.
Drawings
FIG. 1 is a schematic diagram of a tunnel dust concentration measurement and spray dust removal test system.
FIG. 2 is a schematic diagram of the model structure of the test chamber.
Fig. 3 is a schematic diagram of a measuring apparatus.
Fig. 4 is a schematic diagram of a spray dust settling device.
FIG. 5 is a schematic view of a dust collection device
Fig. 6 is a schematic view of the structure of the partition plate in the case.
Fig. 7 is a schematic view of a dust wiper structure of a front panel of the case.
FIG. 8 is a schematic diagram of the non-measuring state structure and the measuring point of the box.
Fig. 9 is a schematic diagram of a measurement state structure and a measurement point of the box (taking a humidity measurement state as an example).
FIG. 10 is a schematic front view of a measurement station in a non-measurement state of a box.
Fig. 11 is a schematic view of a seal separator.
Reference numerals: 1-1, a box body, 1-2, a box body supporting column, 1-3, a front panel, 1-4, a back plate, 1-5, an inner partition plate, 1-6, a crank handle, 1-7, a dust scraper, 1-8, a humidity and spray hole, 1-9, an air inlet hole, 1-10, an air outlet hole, 1-11, a sealing partition plate, 1-12, a sealing rubber plug, 1-13, a shading cloth, 1-14, an air inlet one-way valve, 1-15, an equipment hole, 2-1, a blower, 2-2, a dust box, 2-3, a dust throwing sealing baffle, 2-4, a blower air inlet, 3-1, a humidifier, 3-2, a first water tank, 3-3, a Bluetooth humidity monitor, 3-4, a first hose, 4-1, a camera, 4-2, an annular LED light source, 4-3, a light intensity detector, 4-4, a high-precision humidity detector, 4-5, a handheld concentration detector, 4-6, a computer, 5-1, a water pump, 5-2, a second water tank, 5-6, a second water tank, a dust collector, a hose, a dust collector, a filter, a dust collector, a hose, a filter, a dust collector, a filter and a dust box, a filter and a hose.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. Features such as a part model, a material name, a connection structure, a control method, an algorithm and the like which are not explicitly described in the technical scheme are all regarded as common technical features disclosed in the prior art.
Example 1
The present embodiment provides a tunnel dust concentration measurement and spray dust removal test system, as shown in fig. 1, including:
the test box, as shown in figures 2, 6, 7 and 11, comprises a box body 1-1, a box body supporting column 1-2, a front panel 1-3, a back panel 1-4, an inner partition board 1-5, a hand crank 1-6, a dust scraper 1-7, a sealing rubber plug 1-12 and a shading cloth 1-13; the box body 1-1 is arranged on the box body support column 1-2; the front panel 1-3 and the back panel 1-4 are connected with the box body 1-1 in a sealing way; the inner partition board 1-5 is arranged in the box body 1-1, the periphery of the inner partition board 1-5 is connected with the box body 1-1 in a sealing way, and a rubber ring is arranged on the contact surface of the inner partition board 1-5 and the box body 1-1; the hand crank 1-6 passes through the side opening of the box body 1-1, and the hand crank 1-6 is in sealing connection with the box body 1-1 through a rubber ring; the dust scraper 1-7 penetrates through the opening of the front panel 1-3, and the dust scraper 1-7 is in sealing connection with the front panel 1-3 and is in sealing connection with the front panel by a rubber ring; the sealing rubber plug 1-12 is plugged into the top opening of the box body 1-1; the shading cloth 1-13 is covered outside the box body 1-1; the shading cloth 1-13 is covered outside the box body 1-1 and is used for weakening the influence of ambient light, so that regular research under simple illumination conditions is facilitated, and complex ambient light can be introduced as an influence factor after the shading cloth is removed;
the dust generating device comprises a dust box 2-2 and a blower 2-1, wherein the dust box 2-2 is connected with the blower 2-1; the blower 2-1 blows dust in the dust box 2-2 into the box body 1-1 through the blower air inlet 2-4;
The humidity control device comprises a first water tank 3-2, a humidifier 3-1 and a Bluetooth humidity monitor 3-3; the first water tank 3-2 is connected with the humidifier 3-1 through a first hose 3-4; the steam outlet of the humidifier 3-1 is connected with a socket fitting 5-5 through a first hose 3-4; the Bluetooth humidity monitor 3-3 is adhered to the inner wall of the box body 1-1;
the measuring device, as shown in figure 3, comprises a camera 4-1, an annular LED light source 4-2, a high-precision humidity detector, a light intensity detector 4-3, a computer 4-6 in communication connection with the camera 4-1, and a handheld dust concentration detector 4-5; the camera 4-1 is arranged outside the box body 1-1, the annular LED light source 4-2 is arranged on the front panel 1-3 in the box body 1-1, the annular LED light source 4-2 is in glue connection with the front panel 1-3, and a power supply line runs out from an opening on the contact surface of the light source and the box body 1-1; the high-precision humidity detector, the light intensity detector 4-3 and the detection parts of the hand-held dust concentration detector 4-5 are all arranged on the hand crank 1-6, the high-precision humidity detector, the light intensity detector 4-3 and the detection parts of the hand-held dust concentration detector 4-5 are respectively arranged at the upper diameter and the lower diameter of the hand crank 1-6, and a power supply line and the reading part of the hand-held dust concentration detector 4-5 are discharged from the hollow part of the hand crank 1-6;
The spray dust device, as shown in figure 4, comprises a second water tank 5-2, a water pump 5-1 and a spray head 5-3; the second water tank 5-2 is connected with the water pump 5-1 through a second hose 5-4, the water pump 5-1 is connected with the socket fitting 5-5 through the second hose 5-4, and the spray head 5-3 is connected with the socket fitting 5-5 and is arranged on the inner side of the tank body 1-1;
the dust collecting device, as shown in figure 5, comprises an exhaust fan 6-1, a filtering unit 6-2 and a dust collecting box 6-3; the air inlet of the exhaust fan 6-1 is connected with the air outlet hole 1-10 of the box body 1-1, the air outlet of the exhaust fan 6-1 is connected with the filter unit 6-2, and the dust discharge port of the filter unit 6-2 is connected with the dust collecting box 6-3.
In the specific embodiment, the box body 1-1 is an integrally formed cylinder body, the box body 1-1 is a transparent acrylic cylinder, and the front panel 1-3 and the back panel 1-4 are acrylic circular plates corresponding to the opening size of the cylinder;
the joint surfaces of the front panel 1-3, the back panel 1-4 and the cylinder are provided with circumferential grooves, the circumferential grooves are provided with sealing rings, the upper openings of the sealing rings are provided with outward upper opening reverse edges, the upper opening reverse edges are provided with air holes, the lower openings of the sealing rings are provided with buckles, the buckles are matched with the lower openings of the front panel 1-3 and the back panel 1-4, and sealing can be realized when the buckles are locked; the front panel 1-3 is provided with a hole, the dust scraper 1-7 is penetrated in the hole, and a rubber ring is arranged between the dust scraper 1-7 and the hole; the box body 1-1 is provided with an air inlet hole 1-9 and an air outlet hole 1-10;
One side of the box body 1-1 is provided with a hole, the crank handle 1-6 is penetrated in the hole, and the joint of the crank handle 1-6 and the box body 1-1 is sealed by rubber; the hand crank 1-6 comprises three hollow handles penetrating through the sleeve structure of the box body 1-1 and three semicircular rings respectively connected with the hollow handles, the hollow handles are arranged outside the box body 1-1, the semicircular rings are arranged in the box body 1-1, the hollow handles can drive the semicircular rings to rotate, and the hand crank 1-6 is used for moving the light intensity detector 4-3, the high-precision humidity detector and the hand dust concentration detector 4-5 to a specified position for measurement;
the inner baffle plate 1-5 is a transparent acrylic circular plate, the periphery of the inner baffle plate is expanded into a triangular cone shape for stabilizing the inner baffle plate in the cylinder, a rubber sealing ring is used on the side of the conical bottom surface, an image is stuck on one side of the inner baffle plate 1-5 to serve as a background to be measured, the size of a dust distribution space in the box and the distance between the background to be measured and the camera 4-1 can be changed by changing the position of the baffle plate, the space of the box body 1-1 in which dust is distributed is a dust cavity, and the rear space of the inner baffle plate 1-5 without dust is an isolation cavity.
In the specific embodiment, an air inlet one-way valve 1-14 is arranged between an air inlet 2-4 of the blower and an air outlet 1-10 of the box body 1-1, and the air inlet one-way valve 1-14 is used for providing a relatively stable environment and preventing dust from flowing back into the blower 2-1 during measurement; the dust box 2-2 is arranged at the air inlet of the blower 2-1 and is provided with a dust-throwing sealing baffle 2-3, the dust-throwing sealing baffle 2-3 separates the dust to be thrown in the dust box 2-2 from the blower 2-1 before starting a test, and the addition and the subtraction of the feeding are convenient; the dust generation device controls the dust uniformity by the power and the blowing time of the blower 2-1, and controls the average dust concentration in the box body 1-1 by the quantity of the dust in the dust box 2-2.
In the specific embodiment, the humidifier 3-1 pumps water from the first water tank 3-2 through the first hose 3-4, atomizes the water into water mist, and sends the water mist into the box body 1-1 at the sealing rubber plug 1-12 through the pipeline; the box body 1-1 is provided with a humidity and spray hole 1-8, the sealing rubber plug 1-12 is provided with an equipment hole 1-15, the humidity and spray hole 1-8 corresponds to the equipment hole 1-15, the connector is arranged in the equipment hole 1-15, and the sealing rubber plug 1-12 can realize sealing with a humidifying pipeline by replacing the socket fitting 5-5; the Bluetooth humidity monitor 3-3 is used for monitoring the humidity in the box body 1-1 in real time so as to determine whether water mist is continuously introduced; the humidity inside the box body 1-1 is regulated and stabilized by matching the Bluetooth humidity monitor 3-3 with the humidifier 3-1.
In the specific embodiment, the camera 4-1 is used for shooting images in the box 1-1; the annular LED light source 4-2 is adhered to the inner wall of the box body 1-1 through strong adhesive; when the image to be measured is positioned on the inner partition board 1-5, the light measuring equipment is connected with the semicircular ring, the high-precision humidity detector 4-4 is connected with the semicircular ring, and the hollow handle is rocked to enable the semicircular ring to rotate, the light measuring equipment is used for measuring the light source emission intensity and the background front illumination intensity, and the high-precision humidity detector 4-4 is used for respectively measuring the humidity in the dust cavity in the box body 1-1 and the humidity in front of the inner partition board 1-5; when the image to be measured is positioned on the backboard 1-4, the high-precision humidity detector 4-4 respectively measures the humidity in the dust cavity in the box body 1-1 and the humidity in front of the backboard 1-4; the handheld dust concentration detector 4-5 comprises a probe component and a display processing component, the probe component is connected with the semicircular ring, the display processing component is arranged outside the box body 1-1, a data transmission line is transmitted from the hollow handle to the display processing component, and the handheld dust concentration detector 4-5 is used for measuring and calibrating under various dust conditions; the computer 4-6 is used for receiving and processing the dust image information collected from the camera 4-1 for data analysis and fitting.
In the specific embodiment, the spray dust suppression system researches the spray dust suppression effect of different factors by adjusting the form of the spray head 5-3 and the pressure and flow of the water pump 5-1 to adjust the particle size and the range of sprayed liquid drops; the spray head 5-3 is arranged in the sealing rubber plug 1-12 and is connected with the water pump 5-1 through the second hose 5-4; the water pump 5-1 can perform spray adjustment by adjusting the water pressure and flow; the water pump 5-1 obtains the liquid used for forming the liquid droplets from the second water tank 5-2.
In the specific embodiment, an exhaust fan 6-1 is connected with an air outlet hole 1-10 at the bottom of a box body 1-1, and a sealing baffle is arranged between the exhaust fan 6-1 and the air outlet hole 1-10; the filtering unit 6-2 is connected with an air outlet of the exhaust fan 6-1 and is used for filtering the extracted dust to avoid polluting the environment; the dust collecting box 6-3 is connected with the filtering unit 6-2 and is used for collecting and filtering the obtained dust for weighing and putting the dust into the dust again for testing; the dust collecting device also comprises an optional hose 6-4 and a dust collection head 6-5 which are connected, and when dust collection is difficult to directly withdraw, the hose and the dust collection head 6-5 are used for collecting dust from a designated part in the box body 1-1.
The embodiment also provides a tunnel dust concentration measuring method, as shown in fig. 8, 9 and 10, comprising the following steps:
A1: checking the air tightness of a test box, wherein the space of a box body 1-1 in which dust is distributed is a dust cavity, the rear space of a dust-free inner partition board 1-5 is an isolation cavity, determining the length of the dust cavity, moving the inner partition board 1-5 to a designated position, pasting background images, selecting the type and quality of the dust to be put into a dust box, and covering a shading cloth 1-13;
a2: turning on a Bluetooth humidity monitor 3-3 of a humidity control device, determining whether to introduce water vapor generated by a humidifier 3-1 after the initial humidity to be selected, if the water vapor needs to be introduced, disconnecting the humidifier 3-1 from a sealing rubber plug 1-12 after the water vapor is introduced, blocking an equipment hole 1-15 on the rubber plug, turning on a handheld dust concentration detector 4-5 to a plurality of positions in a box body 1-1 through a hand crank 1-6 for zero calibration or initial concentration measurement, and if the initial dust concentration in the box body 1-1 has a large difference from the actual observation condition, opening the box body 1-1 for cleaning;
a3: turning on an annular LED light source 4-2 of the measuring device, taking a background by using a camera 4-1, and shaking a hand crank 1-6 with a light intensity detector 4-3 to a designated position in front of the background to measure initial light intensity;
a4: opening a blower 2-1 and a dust throwing sealing baffle 2-3 of the dust generating device, blowing dust into the box body 1-1 through an air inlet one-way valve 1-14, closing a dust box baffle after the dust is blown and continuously blown for 2 minutes, and waiting for 1 minute until the dust state in the box body 1-1 is stable;
A5: taking a background picture with dust by using a camera 4-1, taking a picture after a photographic window is scraped out by using a dust scraper 1-7 if the front panel 1-3 has dust adhesion to influence image acquisition, and selecting a background image part with more uniform dust concentration as a fitting part;
a6: opening a handheld dust concentration detector 4-5, shaking a crank handle 1-6 to enable a detection end to reach a fitting part, and measuring the dust concentration of the fitting part as fitting concentration; turning on the light intensity detector 4-3, shaking the hand crank 1-6 to enable the light intensity detector 4-3 to reach the fitting part, and measuring the light intensity as the light intensity after dust; turning on the high-precision humidity detector, shaking the hand crank 1-6 to enable the high-precision humidity detector to reach a fitting part, and measuring humidity to be used as dust humidity;
a7: opening an exhaust fan 6-1, opening a sealing baffle plate 1-11, exhausting and dedusting the interior of the box body 1-1, closing the box body after no obvious dust exists in the box body 1-1, opening a front panel 1-3 or a back panel 1-4 for manual erasure when attached dust still exists on the inner wall of the box body 1-1 and cannot be extracted through exhaust, and collecting the extracted dust for recycling;
a8: carrying out image preprocessing on the collected front and rear images of the dust of the fitting part, such as image dust region positioning and segmentation, original image filtering and denoising, gray level and region averaging, and carrying out corresponding data recording of initial light intensity and dust rear light intensity, initial humidity and dust rear humidity, initial dust concentration and fitting concentration;
A9: after the dust concentration is replaced, the steps A1 to A8 are repeated, so that dust concentration calibration fitting under one working condition can be realized, and a concentration model under a single working condition is established between the image preprocessed in the step A8 and corresponding data;
a10: and (3) repeating the steps A1 to A9 after the initial light intensity, the dust cavity length, the background image and the like are replaced, so that the dust concentration calibration under multiple working conditions can be realized, and a dust concentration model under a complex environment is obtained.
The embodiment also provides a spray dust removal test method, as shown in fig. 8, 9 and 10, comprising the following steps:
b1: selecting a spray nozzle 5-3, spray pressure, spray flow rate and spray time or an intermittent spray scheme to be adopted;
b2: before the test, the light intensity detector 4-3 is turned on, the hand crank 1-6 is rocked to enable the light intensity detector 4-3 to reach the measuring position, and the measured light intensity is used as the light intensity of dust; opening a high-precision humidity detector, shaking a hand crank 1-6 to enable the high-precision humidity detector to reach a measurement position, measuring humidity as dust, inputting obtained data into a concentration model obtained by a tunnel dust concentration measurement test to obtain initial dust concentration in a box 1-1;
b3: carrying out timing spraying dust removal by using the spraying data and the scheme selected in the step B1, and standing for a period of time to wait for the dust state in the box body 1-1 to recover uniformly;
B4: turning on the light intensity detector 4-3, and shaking the hand crank 1-6 to enable the light intensity detector 4-3 to reach a measuring position, and measuring the light intensity as the light intensity after dust removal; opening a high-precision humidity detector 4-4, shaking a hand crank 1-6 to enable the high-precision humidity detector 4-4 to reach a fitting position, measuring humidity as the humidity after dust removal, inputting the obtained data into a concentration model obtained by a tunnel dust concentration measurement test to obtain the dust concentration after dust removal in a test box;
b5: repeating steps B3, B4 if an intermittent spray scheme is used;
b6: opening an exhaust fan 6-1, opening a sealing baffle plate 1-11, exhausting and dedusting the interior of the box body 1-1, closing the box body after no obvious dust exists in the box body 1-1, opening a front panel 1-3 or a back panel 1-4 for manual erasure when attached dust still exists on the inner wall of the box body 1-1 and cannot be extracted through exhaust, and collecting the extracted dust for recycling;
b7: and comparing the initial dust concentration with the dust concentration after dust removal to obtain a dust removal effect, and analyzing the influence of spraying factors such as water consumption, pressure and the like.
The components not described in detail in this embodiment are all existing components that can be purchased in public channels.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. A tunnel dust concentration measurement and spray dust removal test system, comprising:
the test box comprises a box body (1-1), a box body supporting column (1-2), a front panel (1-3), a back panel (1-4), an inner partition board (1-5), a crank handle (1-6), a dust scraper (1-7), a sealing rubber plug (1-12) and shading cloth (1-13); the box body (1-1) is arranged on the box body supporting column (1-2); the front panel (1-3) and the back panel (1-4) are connected with the box body (1-1) in a sealing way; the inner partition board (1-5) is arranged in the box body (1-1), and the periphery of the inner partition board (1-5) is connected with the box body (1-1) in a sealing way; the dust scraper (1-7) penetrates through the opening of the front panel (1-3), and the dust scraper (1-7) is connected with the front panel (1-3) in a sealing way; the sealing rubber plug (1-12) is plugged into the top opening of the box body (1-1); the shading cloth (1-13) is covered outside the box body (1-1);
the dust generation device comprises a dust box (2-2) and a blower (2-1), wherein the dust box (2-2) is connected with the blower (2-1); the blower (2-1) blows dust in the dust box (2-2) into the box body (1-1) through a blower air inlet (2-4);
the humidity control device comprises a first water tank (3-2), a humidifier (3-1) and a Bluetooth humidity monitor (3-3); the first water tank (3-2) is connected with the humidifier (3-1) through a first hose (3-4); the steam outlet of the humidifier (3-1) is connected with a socket fitting (5-5) through a first hose (3-4); the Bluetooth humidity monitor (3-3) is adhered to the inner wall of the box body (1-1);
The measuring device comprises a camera (4-1), light supplementing equipment, a high-precision humidity detector (4-4), light measuring equipment, a computer (4-6) in communication connection with the camera (4-1) and a handheld dust concentration detector (4-5); the camera (4-1) is arranged outside the box body (1-1), and the light supplementing equipment is arranged on a front panel (1-3) in the box body (1-1); the high-precision humidity detector (4-4), the light measuring equipment and the detection components of the handheld dust concentration detector (4-5) are arranged on the crank handle (1-6);
the spray dust device comprises a second water tank (5-2), a water pump (5-1) and a spray head (5-3); the second water tank (5-2) is connected with the water pump (5-1) through a second hose (5-4), the water pump (5-1) is connected with the socket fitting (5-5) through the second hose (5-4), and the spray head (5-3) is connected with the socket fitting (5-5) and is arranged at the inner side of the tank body (1-1);
the dust collecting device comprises an exhaust fan (6-1), a filtering unit (6-2) and a dust collecting box (6-3); the air inlet of the exhaust fan (6-1) is connected with the air outlet hole (1-10) of the box body (1-1), the air outlet of the exhaust fan (6-1) is connected with the filtering unit (6-2), and the dust discharging port of the filtering unit (6-2) is connected with the dust collecting box (6-3).
2. A tunnel dust concentration measurement and spray dust removal test system according to claim 1, wherein,
the box body (1-1) is a transparent acrylic cylinder, and the front panel (1-3) and the back panel (1-4) are acrylic circular plates corresponding to the opening of the cylinder in size;
the front panel (1-3), the back panel (1-4) and the cylinder joint surface are provided with circumferential grooves, the circumferential grooves are provided with sealing rings, the upper openings of the sealing rings are provided with outward upper opening reverse edges, the upper opening reverse edges are provided with air holes, the lower openings of the sealing rings are provided with buckles, the buckles are matched with the lower openings of the front panel (1-3) and the back panel (1-4), and sealing can be realized when the buckles are locked; the front panel (1-3) is provided with a hole, the dust scraper (1-7) is penetrated in the hole, and a rubber ring is arranged between the dust scraper (1-7) and the hole; an air inlet (1-9) and an air outlet (1-10) are formed in the box body (1-1);
one side of the box body (1-1) is provided with a hole, the crank handle (1-6) is penetrated in the hole, and the joint of the crank handle (1-6) and the box body (1-1) is sealed by rubber; the crank handle (1-6) comprises three hollow handles penetrating through a sleeve structure of the box body (1-1) and three semicircular rings connected with the hollow handles respectively, the hollow handles are arranged outside the box body (1-1), the semicircular rings are arranged in the box body (1-1), the hollow handles can drive the semicircular rings to rotate, and the crank handle (1-6) is used for moving the photometry equipment, the high-precision humidity detector (4-4) and the handheld dust concentration detector (4-5) to a designated position for measurement;
The inner partition board (1-5) is a transparent acrylic circular board, the periphery of the inner partition board is expanded into a triangular cone shape for stabilizing the inner partition board in the cylinder, a rubber sealing ring is used on the side of the conical bottom surface or vaseline is added for sealing, and when the back board (1-4) is used as a background image carrier, the inner partition board (1-5) is used for changing the volume and sealing of a dust space; when the backboard (1-4) is not used as a background image carrier, one side of the inner partition board (1-5) is stuck with an image to be measured as a background, and the space volume of dust distribution space in the box and the distance between the background to be measured and the camera (4-1) can be changed by changing the position of the partition board, the space of the box body (1-1) with dust distribution is a dust cavity, and the rear space of the inner partition board (1-5) without dust is an isolation cavity.
3. The tunnel dust concentration measurement and spray dust removal test system according to claim 1, wherein an air inlet check valve (1-14) is arranged between an air inlet (2-4) of the blower and an air outlet (1-10) of the box body (1-1), and the air inlet check valve (1-14) is used for providing stable environment and preventing dust from flowing back into the blower (2-1) during measurement; the dust box (2-2) is arranged at the air inlet of the air blower (2-1) and is provided with a dust-throwing sealing baffle (2-3), and the dust-throwing sealing baffle (2-3) separates the dust to be thrown in the dust box (2-2) from the air blower (2-1) before starting a test and facilitates addition and subtraction of materials; the dust generation device controls the dust uniformity by the power and the blasting time of the blower (2-1), and controls the average dust concentration in the box body (1-1) by the amount of dust in the dust box (2-2).
4. The tunnel dust concentration measurement and spray dust removal test system according to claim 1, wherein the humidifier (3-1) draws water from the first water tank (3-2) through a first hose (3-4), atomizes the water into water mist, and sends the water mist into the box body (1-1) at the sealing rubber plug (1-12) through a pipeline; the sealing rubber plug (1-12) can realize sealing with the humidifying pipeline by replacing the socket fitting (5-5); the Bluetooth humidity monitor (3-3) is used for monitoring the humidity in the box body (1-1) in real time so as to determine whether water mist is continuously introduced; the humidity inside the box body (1-1) is regulated and stabilized by connecting the Bluetooth humidity monitor (3-3) with the humidifier (3-1) through Bluetooth.
5. A tunnel dust concentration measurement and spray dust removal test system according to claim 2, wherein the camera (4-1) is adapted to take images of the inside of the housing (1-1); the light supplementing equipment is adhered to the inner wall of the box body (1-1) through strong adhesive; when an image to be measured is positioned on the inner partition board (1-5), the light measuring equipment is connected with the semicircular ring, the high-precision humidity detector (4-4) is connected with the semicircular ring, the hollow handle is rocked to enable the semicircular ring to rotate, the light measuring equipment is used for measuring the light source emission intensity and the background front illumination intensity, and the high-precision humidity detector (4-4) is used for respectively measuring the humidity in a dust cavity in the box body (1-1) and the humidity in front of the inner partition board (1-5); when the image to be measured is positioned on the backboard (1-4), the high-precision humidity detector (4-4) respectively measures the humidity in the dust cavity in the box body (1-1) and the humidity in front of the backboard (1-4); the handheld dust concentration detector (4-5) comprises a probe component and a display processing component, the probe component is connected with the semicircular ring, the display processing component is arranged outside the box body (1-1), a data transmission line is transmitted from the hollow handle to the display processing component, and the handheld dust concentration detector (4-5) is used for measuring and calibrating under various dust conditions; the computer (4-6) is used for receiving and processing dust image information collected from the camera (4-1) for data analysis and fitting.
6. The tunnel dust concentration measurement and spray dust removal test system according to claim 1, wherein the spray dust removal system explores spray dust removal effects of different factors by adjusting the form of the spray head (5-3), the pressure and the flow of the water pump (5-1) and the particle size and the range of sprayed liquid drops; the spray head (5-3) is arranged in the sealing rubber plug (1-12) and is connected with the water pump (5-1) through a second hose (5-4); the water pump (5-1) can perform spray adjustment by adjusting the water pressure and flow; the water pump (5-1) obtains liquid for forming liquid drops from the second water tank (5-2).
7. The tunnel dust concentration measurement and spray dust removal test system according to claim 1, wherein the exhaust fan (6-1) is connected with an air outlet hole (1-10) at the bottom of the box body (1-1), and a sealing baffle is detachably arranged between the exhaust fan (6-1) and the air outlet hole (1-10); the filtering unit (6-2) is connected with an air outlet of the exhaust fan (6-1) and is used for filtering the extracted dust to avoid polluting the environment; the dust collection box (6-3) is connected with the filtering unit (6-2) and is used for collecting and filtering the obtained dust for weighing and putting the dust into the dust again for testing; the dust collection device also comprises an optional hose (6-4) and a dust collection head (6-5) which are connected, and when dust collection is difficult to directly withdraw, the hose and the dust collection head (6-5) are used for collecting dust from a designated part in the box body (1-1).
8. The tunnel dust concentration measurement and spray dust removal test system according to claim 1, wherein the box body (1-1) is an integrally formed cylinder or a spliced cylinder sealed by glass cement; sealing measures are arranged at all openings of the box body (1-1), and air tightness is required to be checked before the test starts.
9. A tunnel dust concentration measurement and spray dust removal test method using the tunnel dust concentration measurement and spray dust removal test system according to any one of claims 1 to 8, characterized in that the tunnel dust concentration measurement method comprises the steps of:
a1: checking the air tightness of a test box, wherein the space of a box body (1-1) with dust distribution is a dust cavity, the rear space of a dust-free inner partition board (1-5) is an isolation cavity, determining the length of the dust cavity, moving the inner partition board (1-5) to a designated position, pasting a background image, selecting the type and quality of dust to be put into a dust box, and covering a shading cloth (1-13);
a2: opening a Bluetooth humidity monitor (3-3) of a humidity control device, determining whether to introduce water vapor generated by a humidifier (3-1) after the initial humidity to be selected, if the water vapor needs to be introduced, disconnecting the humidifier (3-1) from a sealing rubber plug (1-12) after the water vapor is introduced, blocking an equipment hole (1-15) in the rubber plug, opening a handheld dust concentration detector (4-5), shaking the handheld dust concentration detector to a plurality of positions in a box body (1-1) through a hand crank (1-6), performing zero calibration or initial concentration measurement, and if the difference between the initial dust concentration in the box body (1-1) and the actual observation condition is large, opening the box body (1-1), and cleaning;
A3: opening a light supplementing device of the measuring device, taking a background by using a camera (4-1), and shaking a crank handle (1-6) with the light supplementing device to a designated position in front of the background to measure initial light intensity;
a4: opening a blower (2-1) and a dust throwing sealing baffle (2-3) of the dust generating device, blowing dust into the box body (1-1) through an air inlet one-way valve (1-14), closing a dust box baffle after the dust is blown and the air is continuously blown, and waiting until the dust state in the box body (1-1) is stable;
a5: taking a background picture with dust by using a camera (4-1), if the front panel (1-3) has dust adhesion to influence image acquisition, taking the picture after scraping a photographing window by using a dust scraper (1-7), and selecting a background image part with uniform dust concentration as a fitting part;
a6: opening a handheld dust concentration detector (4-5), cranking a crank handle (1-6) to enable a detection end to reach a fitting part, and measuring the dust concentration of the fitting part as fitting concentration; starting the light measuring equipment, cranking the crank (1-6) to enable the light measuring equipment to reach the fitting part, and measuring the light intensity as the light intensity after dust; opening the high-precision humidity detector (4-4), cranking the crank (1-6) to enable the high-precision humidity detector (4-4) to reach a fitting part, and measuring humidity to be used as dust humidity;
A7: opening an exhaust fan (6-1), opening a sealing baffle plate (1-11), exhausting and dedusting the interior of the box body (1-1), closing the box body after no obvious dust exists in the box body (1-1), manually erasing the front panel (1-3) or the back panel (1-4) when the attached dust still cannot be extracted through the exhaust, and collecting the extracted dust for recycling;
a8: preprocessing the collected front and rear images of the dust of the fitting part, and recording corresponding data of initial light intensity and post-dust light intensity, initial humidity and post-dust humidity, initial dust concentration and fitting concentration;
a9: after the dust concentration is replaced, the steps A1 to A8 are repeated, so that dust concentration calibration fitting under one working condition can be realized, and a concentration model under a single working condition is established between the image preprocessed in the step A8 and corresponding data;
a10: and (3) repeating the steps A1 to A9 after the initial light intensity, the dust cavity length, the background image and the like are replaced, so that the dust concentration calibration under multiple working conditions can be realized, and a dust concentration model under a complex environment is obtained.
10. A tunnel dust concentration measurement and spray dust removal test method of the tunnel dust concentration measurement and spray dust removal test system as claimed in claim 9, wherein the spray dust removal test method comprises the steps of:
B1: selecting a spray nozzle (5-3), spray pressure, spray flow rate and spray time or an intermittent spray scheme to be adopted;
b2: before the test, the light measuring equipment is started, the crank handle (1-6) is cranked to enable the light measuring equipment to reach the measuring position, and the measured light intensity is used as the light intensity after dust; opening a high-precision humidity detector (4-4), cranking a crank handle (1-6) to enable the high-precision humidity detector (4-4) to reach a measuring position, measuring humidity as dust and then humidity, inputting obtained data into a concentration model obtained by a tunnel dust concentration measurement test to obtain initial dust concentration in a box body (1-1);
b3: carrying out timing spraying dust removal by using the spraying data and the scheme selected in the step B1, and standing for a period of time to wait for the dust state in the box body (1-1) to be recovered uniformly;
b4: starting the light measuring equipment, and cranking the crank (1-6) to enable the light measuring equipment to reach a measuring position, wherein the measured light intensity is used as the light intensity after dust removal; opening a high-precision humidity detector (4-4), cranking a crank handle (1-6) to enable the high-precision humidity detector (4-4) to reach a fitting position, measuring humidity as the humidity after dust removal, inputting obtained data into a concentration model obtained by a tunnel dust concentration measurement test to obtain the dust concentration after dust removal in a test box;
B5: repeating steps B3, B4 if an intermittent spray scheme is used;
b6: opening an exhaust fan (6-1), opening a sealing baffle plate (1-11), exhausting and dedusting the interior of the box body (1-1), closing the box body after no obvious dust exists in the box body (1-1), manually erasing the front panel (1-3) or the back panel (1-4) when the attached dust still cannot be extracted through the exhaust, and collecting the extracted dust for recycling;
b7: and comparing the initial dust concentration with the dust concentration after dust removal to obtain a dust removal effect, and analyzing the influence of water consumption and pressure.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118122063A (en) * | 2024-03-22 | 2024-06-04 | 生态环境部南京环境科学研究所 | Dust collector is used in environmental engineering construction with purification performance |
| CN118122063B (en) * | 2024-03-22 | 2024-10-22 | 生态环境部南京环境科学研究所 | Dust collector is used in environmental engineering construction with purification performance |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118122063A (en) * | 2024-03-22 | 2024-06-04 | 生态环境部南京环境科学研究所 | Dust collector is used in environmental engineering construction with purification performance |
| CN118122063B (en) * | 2024-03-22 | 2024-10-22 | 生态环境部南京环境科学研究所 | Dust collector is used in environmental engineering construction with purification performance |
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