Method and apparatus for black smoke generation control for a ringelmann blackness detection apparatus

Abstract

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.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental monitoring, and particularly provides a black smoke generation control method and device for a Lunge blackness detection device. BACKGROUND

[0002] In the current field of environmental monitoring and automobile detection, Lunge blackness detection devices are widely used to detect the black smoke concentration in the exhaust gas of fuel automobiles. The Lunge blackness detection device quantifies the gray-white ratio of black smoke through image analysis technology to evaluate whether the exhaust emission meets environmental protection standards. However, in the related art, the calibration of the Lunge blackness detection device mainly relies on standard blackness plates for metrological calibration. The black line grid pattern on the standard blackness plate cannot accurately simulate the actual diffusion state of black smoke in the air, resulting in a large error in the calibration process and affecting the accuracy and reliability of the detection device. SUMMARY

[0003] In order to solve the problems of the prior art, the present application aims to provide a black smoke generation control method and device for a Lunge blackness detection device, which can achieve accurate calibration of the Lunge blackness detection device.

[0004] In a first aspect, the present application provides a black smoke generation control method for a Lunge blackness detection device, which is applied to a black smoke generation device that is part of the Lunge blackness detection device. The method comprises:

[0005] Obtaining a to-be-calibrated Lunge blackness sub-level, and configuring the concentration of black smoke simulation liquid based on the to-be-calibrated Lunge blackness sub-level and the to-be-calibrated Lunge blackness total level;

[0006] Matching the to-be-calibrated Lunge blackness sub-level with reference levels in the first level set and the second level set, respectively;

[0007] If the to-be-calibrated Lunge blackness sub-level matches any first reference level in the first level set, controlling the black smoke simulation liquid to enter the first generation sub-device, and starting the first generation sub-device to generate black smoke of a first concentration; if the to-be-calibrated Lunge blackness sub-level matches any second reference level in the second level set, controlling the black smoke simulation liquid to enter the second generation sub-device, and starting the second generation sub-device to generate black smoke of a second concentration;

[0008] Obtaining the gray-white ratio of the detected first concentration black smoke or second concentration black smoke for camera comparison with the Lunge blackness plate, and adjusting the corresponding first generation sub-device or second generation sub-device based on the gray-white ratio.

[0009] In one of the embodiments, the first generating sub-device and the second generating sub-device respectively perform different black smoke generating modes; the first concentration black smoke generated by the black smoke generating mode performed by the first generating sub-device has a lower concentration than the second concentration black smoke generated by the black smoke generating mode performed by the second generating sub-device.

[0010] In one of the embodiments, the first generating sub-device or the second generating sub-device is adjusted based on the gray-white ratio, including:

[0011] The power of the first generating sub-device and the flow rate of the black smoke simulation liquid into the first generating sub-device are adjusted based on the gray-white ratio and the to-be-calibrated Lennert blackness sub-grade, so as to change the concentration of the first concentration black smoke; and / or,

[0012] The flow rate of the auxiliary gas in the second generating sub-device and the flow rate of the black smoke simulation liquid into the second generating sub-device are adjusted based on the gray-white ratio and the to-be-calibrated Lennert blackness sub-grade, so as to change the concentration of the second concentration black smoke.

[0013] In one of the embodiments, each first reference grade in the first grade set is smaller than each second reference grade in the second grade set; the number of the first reference grades in the first grade set is smaller than the number of the second reference grades in the second grade set.

[0014] In one of the embodiments, the black smoke simulation liquid is configured based on the to-be-calibrated Lennert blackness sub-grade and the to-be-calibrated Lennert blackness total grade, including:

[0015] The to-be-calibrated Lennert blackness total grade includes a plurality of to-be-calibrated Lennert blackness sub-grades; a reference grade in the to-be-calibrated Lennert blackness total grade is a sub-grade in the plurality of to-be-calibrated Lennert blackness sub-grades, and the sub-grades in the to-be-calibrated Lennert blackness total grade cover the blackness grades that can be detected by the Lennert blackness detection device;

[0016] It is determined whether the to-be-calibrated Lennert blackness sub-grade is the reference grade in the to-be-calibrated Lennert blackness total grade;

[0017] If not, it is determined the offset position of the to-be-calibrated Lennert blackness sub-grade relative to the reference grade;

[0018] The black smoke simulation liquid is configured based on the offset position.

[0019] In a second aspect, the present application further provides a black smoke generating device for a Lennert blackness detection device, the black smoke generating device being part of the Lennert blackness detection device, and the device including:

[0020] A first generating sub-device for generating first concentration black smoke;

[0021] a second generating sub-device configured to generate a second concentration of black smoke; wherein the first generating sub-device and the second generating sub-device are not operated at the same time;

[0022] a first pump valve group connected to the first generating sub-device and the second generating sub-device respectively, configured to send the configured black smoke simulation liquid to the first generating sub-device or the second generating sub-device to make the first generating sub-device or the second generating sub-device generate the corresponding concentration of black smoke;

[0023] a control unit configured to execute the black smoke generating control method for the Rinkenmann blackness detection device of the first aspect.

[0024] In one of the embodiments, the black smoke generating device further comprises a solution mixing sub-device, the solution mixing sub-device comprising a plurality of first containers for placing different base liquids, a second container for placing black smoke simulation liquid, and a second pump valve group;

[0025] The plurality of first containers are connected to the second container through the second pump valve group, and the second container is connected to the first pump valve group; the concentration of the black smoke simulation liquid in the second container is changed by adjusting the flow parameter of the second pump valve group.

[0026] In one of the embodiments, the solution mixing sub-device further comprises a refractometer, which is used to obtain the concentration of the black smoke simulation liquid in the second container, and the control unit is configured to adjust the flow parameter of the second pump valve group based on the concentration obtained by the refractometer to change the proportion of the different base liquids in the second container.

[0027] The solution mixing sub-device comprises at least three first containers for placing corresponding base liquids, and the concentration of one of the base liquids can be determined by the refractometer, and the concentration of the base liquid is related to the sub-grade of the Rinkenmann blackness to be calibrated.

[0028] In one of the embodiments, the black smoke generating device further comprises a self-cleaning sub-device, the self-cleaning sub-device comprising a cleaning tank and an air compressor, the first pump valve group being a gas-liquid pump valve group, and the cleaning tank and the air compressor being connected to the first valve group.

[0029] The liquid pump in the first pump valve group can extract water source in the cleaning tank to clean the pipelines in the first generating sub-device and the second generating sub-device; after cleaning the pipelines in the first generating sub-device and the second generating sub-device, the air compressor can perform pulse back blowing to the pipelines in the first generating sub-device and the second generating sub-device through the gas pump in the first pump valve group.

[0030] In one of the embodiments, the first generating sub-device converts the black smoke simulation liquid into droplets through a high-frequency piezoelectric ceramic array, and converts the droplets into the first concentration black smoke through a nozzle in the first generating sub-device; the second generating sub-device converts the black smoke simulation liquid into droplets through a Venturi tube based on the Bernoulli effect, and converts the droplets into the second concentration black smoke through a nozzle in the second generating sub-device.

[0031] The solution mixing sub-device further comprises a heating module, which is located at least at the bottom of the second container, and a stirrer is arranged in the second container, and the heating module is used for heating at least when the stirrer is working, and the temperature in the second container is controlled within a target range.

[0032] The black smoke generation method and device for the Linggeman blackness detection equipment, the method comprises: obtaining a to-be-calibrated Linggeman blackness sub-grade, and configuring the concentration of the black smoke simulation liquid according to the to-be-calibrated Linggeman blackness sub-grade and the to-be-calibrated Linggeman blackness total grade. The to-be-calibrated Linggeman blackness sub-grade is matched with the reference grades in the first grade set and the second grade set respectively. If the to-be-calibrated Linggeman blackness sub-grade matches a first reference grade in the first grade set, the black smoke simulation liquid is controlled to enter the first generating sub-device, and the first generating sub-device is started to generate the first concentration black smoke. If the to-be-calibrated Linggeman blackness sub-grade matches a second reference grade in the second grade set, the black smoke simulation liquid is controlled to enter the second generating sub-device, and the second generating sub-device is started to generate the second concentration black smoke. The gray-white ratio of the first concentration or the second concentration black smoke detected by the camera used for Linggeman blackness plate comparison is obtained. If the gray-white ratio of the first concentration or the second concentration is inconsistent with the standard gray-white ratio, the relevant parameters of the corresponding first generating sub-device or second generating sub-device are adjusted according to the gray-white ratio to reach the standard gray-white ratio. The method configures the concentration of the black smoke simulation liquid and selects the appropriate generating sub-device to generate the black smoke of the corresponding concentration, and adjusts according to the gray-white ratio, so as to realize the accurate calibration of the Linggeman blackness detection equipment. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The flow chart of the black smoke generation control method for the Linggeman blackness detection equipment in one embodiment;

[0034] Figure 2 The flow chart of the black smoke simulation liquid configured according to the to-be-calibrated Linggeman blackness sub-grade and the to-be-calibrated Linggeman blackness total grade in one embodiment;

[0035] Figure 3 The electrical connection diagram of the black smoke generation device in one embodiment;

[0036] Figure 4 The pipeline connection diagram of the black smoke generation device in one embodiment;

[0037] Figure 5 Figure 2 is a piping connection diagram of a black smoke generation device in another embodiment. DETAILED DESCRIPTION

[0038] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Unless otherwise defined, the technical terms or scientific terms involved in the present application should have the general meanings understood by those skilled in the art.

[0039] In one embodiment, as shown in Figure 1 A black smoke generation control method for a Lignermann blackness detection device is provided, which is applied to a black smoke generation device, the black smoke generation device being part of the Lignermann blackness detection device, and the method comprises the following steps:

[0040] Step 101: Obtain a to-be-calibrated Lignermann blackness sub-grade, and configure the concentration of black smoke simulation liquid based on the to-be-calibrated Lignermann blackness sub-grade and the to-be-calibrated Lignermann blackness total grade.

[0041] Specifically, the range of the to-be-calibrated Lignermann blackness total grade is determined, for example, the to-be-calibrated Lignermann blackness total grade is grade 1 to grade 5, each to-be-calibrated Lignermann blackness sub-grade in the to-be-calibrated Lignermann blackness total grade corresponds to a different black smoke simulation liquid concentration range, and the black smoke simulation liquid corresponding to the range of the to-be-calibrated Lignermann blackness total grade can be 5%-30%. Further, the specific to-be-calibrated Lignermann blackness sub-grade is obtained, which is assumed to be grade 3, and the concentration range of the black smoke simulation liquid corresponding to grade 3 is 15%-20%. According to the corresponding black smoke simulation liquid concentration range, the corresponding black smoke simulation liquid concentration is configured.

[0042] Exemplarily, if the to-be-calibrated Lignermann blackness total grade is grade 1-10, the black smoke simulation liquid corresponding to the range of the to-be-calibrated Lignermann blackness total grade can be 5%-55%, the to-be-calibrated sub-grade is grade 7, the corresponding black smoke simulation liquid concentration is 35%-40%, and the black smoke simulation liquid is configured according to the concentration range.

[0043] Step 102: Match the to-be-calibrated Lignermann blackness sub-grade with the reference grades in the first grade set and the second grade set, respectively.

[0044] Specifically, the first and second sets of levels can be two different sets of reference levels preset according to the range of the total level of the Lignermann blackness. The first set of levels can include reference levels of lower concentrations, such as levels 1, 2, and 3; and the second set of levels can include reference levels of higher concentrations, such as levels 4 and 5. The division of the two sets of levels can be based on the difference in the concentration of black smoke, and the first reference level in the first set of levels can correspond to lower concentration of black smoke, and the second reference level in the second set of levels can correspond to higher concentration of black smoke.

[0045] Exemplarily, the first reference levels included in the first set of levels are levels 1, 2, and 3; and the second reference levels included in the second set of levels are levels 4 and 5. If the to-be-calibrated Lignermann blackness sub-level is level 3, the to-be-calibrated Lignermann blackness sub-level is matched with the first reference levels in the first set of levels, and the first set of levels includes the first reference level of level 3, it is determined that the to-be-calibrated Lignermann blackness sub-level belongs to the first set of levels; similarly, if the to-be-calibrated sub-level is level 5, the to-be-calibrated Lignermann blackness sub-level is matched with the second reference levels in the second set of levels, and the second set of levels has the second reference level of level 5, it is determined that the to-be-calibrated Lignermann blackness sub-level belongs to the second set of levels.

[0046] Step 103: If the to-be-calibrated Lignermann blackness sub-level matches any first reference level in the first set of levels, the black smoke simulation liquid is controlled to enter the first generating sub-device, and the first generating sub-device is started to generate black smoke of the first concentration; if the to-be-calibrated Lignermann blackness sub-level matches any second reference level in the second set of levels, the black smoke simulation liquid is controlled to enter the second generating sub-device, and the second generating sub-device is started to generate black smoke of the second concentration.

[0047] If the to-be-calibrated Lignermann blackness sub-level matches any first reference level (such as level 1, level 2, or level 3) in the first set of levels, the to-be-calibrated Lignermann blackness sub-level belongs to the first set of levels. The black smoke generating device can control the black smoke simulation liquid to enter the first generating sub-device, and the first generating sub-device can use ultrasonic atomization technology to generate uniform gasified droplets through a high-frequency piezoelectric ceramic array, form a gas curtain, and an industrial camera identifies the gray-white proportion of the image, and the power of the high-frequency piezoelectric ceramic array and the flow of the liquid pump are adjusted accordingly, so as to generate black smoke of the first concentration.

[0048] If the to-be-calibrated Lignin blackness sub-level matches any second reference level (such as level 4 or level 5) in the second level set, the to-be-calibrated Lignin blackness sub-level belongs to the second level set. The black smoke generating device controls the black smoke simulation liquid to enter the second generating sub-device. Based on the principle of aerosol jet, the Bernoulli effect is used to make the sheath gas pass through the Venturi tube structure to generate negative pressure, and the black smoke simulation liquid is sucked into atomization to form gasified liquid droplets. An industrial camera is used to identify the gray-white ratio and feedback control the sheath gas flow rate and liquid pump flow rate, thereby generating the second concentration black smoke.

[0049] Step 104: Obtain the gray-white ratio of the camera, the detected first concentration black smoke or the second concentration black smoke for Lignin blackness plate comparison, and adjust the corresponding first generating sub-device or second generating sub-device based on the gray-white ratio.

[0050] When the first generating sub-device generates the first concentration black smoke or the second generating sub-device generates the second concentration black smoke, the camera can detect the gray-white ratio of the first concentration black smoke or the second concentration black smoke. Based on the detected gray-white ratio of the first concentration black smoke or the second concentration black smoke, the first generating sub-device or the second generating sub-device can automatically adjust the relevant parameters of the corresponding generating sub-device to ensure that the black smoke generated by the corresponding generating sub-device reaches the standard gray-white ratio. The camera belongs to part of the Lignin blackness detection equipment.

[0051] For the first generating sub-device, when the gray-white ratio of the first concentration black smoke is detected to be inconsistent with the standard gray-white ratio of the first concentration black smoke, the power of the high-frequency piezoelectric ceramic array in the ultrasonic atomization unit and the flow rate of the liquid pump in the gas-liquid pump valve group are adjusted accordingly. Change the atomization effect and gas curtain thickness of the black smoke simulation liquid, and then adjust the concentration of the black smoke to reach the standard gray-white ratio of the first concentration.

[0052] For the second generating sub-device, if the gray-white ratio of the second concentration black smoke is detected to be inconsistent with the standard gray-white ratio of the second concentration black smoke, the sheath gas flow rate and the flow rate of the liquid pump in the aerosol jet unit are adjusted to change the atomization effect and gas curtain thickness of the black smoke simulation liquid, and then the concentration of the black smoke is adjusted to reach the standard gray-white ratio of the second concentration black smoke.

[0053] In the embodiment, the method comprises: obtaining a to-be-calibrated Lennert blackness sub-grade, and configuring the concentration of black smoke simulation liquid according to the to-be-calibrated Lennert blackness sub-grade and the to-be-calibrated Lennert blackness total grade. The to-be-calibrated Lennert blackness sub-grade is matched with reference grades in the first grade set and the second grade set respectively. If the to-be-calibrated Lennert blackness sub-grade matches a first reference grade in the first grade set, the black smoke simulation liquid is controlled to enter the first generation sub-device, and the first generation sub-device is started to generate black smoke of a first concentration. If the to-be-calibrated Lennert blackness sub-grade matches a second reference grade in the second grade set, the black smoke simulation liquid is controlled to enter the second generation sub-device, and the second generation sub-device is started to generate black smoke of a second concentration. The gray-white ratio of the first concentration or the second concentration of black smoke detected by the camera is obtained. If the gray-white ratio of the first concentration or the second concentration is inconsistent with the standard gray-white ratio, the corresponding first generation sub-device or second generation sub-device is adjusted according to the gray-white ratio to reach the standard gray-white ratio. The method realizes accurate calibration of the Lennert blackness detection device by configuring the concentration of black smoke simulation liquid, selecting the corresponding generation sub-device to generate black smoke of the corresponding concentration, and adjusting according to the gray-white ratio.

[0054] In one embodiment, the first generation sub-device and the second generation sub-device respectively perform different black smoke generation modes; the first concentration of black smoke generated by the black smoke generation mode performed by the first generation sub-device is lower than the second concentration of black smoke generated by the black smoke generation mode performed by the second generation sub-device.

[0055] Specifically, if the to-be-calibrated Lennert blackness sub-grade matches any first reference grade (for example, 1st grade, 2nd grade, 3rd grade) in the first grade set, the to-be-calibrated Lennert blackness sub-grade belongs to the first grade set. The black smoke simulation liquid can be controlled by the black smoke generation device to enter the first generation sub-device, and the first generation sub-device can adopt an ultrasonic atomization mode. The ultrasonic atomization mode can atomize the black smoke simulation liquid into uniform droplets of 2-10 microns through a high-frequency piezoelectric ceramic array, and then form an air curtain through a ring array nozzle. An industrial camera identifies the gray-white ratio of the image, and the power of the high-frequency piezoelectric ceramic array and the flow rate of the liquid pump are adjusted accordingly, so as to generate black smoke of the first concentration.

[0056] If the to-be-calibrated Lennert blackness sub-grade matches any second reference grade (for example, 4th grade, 5th grade) in the second grade set, the to-be-calibrated Lennert blackness sub-grade belongs to the second grade set. The black smoke simulation liquid is controlled by the black smoke generation device to enter the second generation sub-device, and an aerosol injection mode is used. By utilizing Bernoulli effect, the sheath gas generates negative pressure through a Venturi tube structure, the black smoke simulation liquid is sucked in and atomized into uniform droplets of 10-50 microns. The flow rate of the sheath gas and the flow rate of the liquid pump are controlled by an industrial camera to identify the gray-white ratio and feedback, and then black smoke of the second concentration is generated.

[0057] The second concentration of black smoke is determined by the following formula:

[0058]

[0059] wherein, is the aerosol ejection coefficient, generally 0.6-0.9; is the sheath gas pressure difference; is the nozzle diameter, generally 0.1-0.5 mm ; is the black smoke simulation liquid concentration; is the density of the black smoke simulation liquid.

[0060] It should be noted that the first generating sub-device uses ultrasonic atomization technology to atomize the black smoke simulation liquid into smaller droplets to form an air curtain, thereby generating first concentration black smoke with a lower concentration; the second generating sub-device is based on the aerosol ejection principle, and the black smoke simulation liquid is sucked and atomized into larger droplets under negative pressure through the Bernoulli effect, thereby generating second concentration black smoke with a higher concentration. Therefore, the concentration of the black smoke generated by the first generating sub-device is lower than the concentration of the black smoke generated by the second generating sub-device.

[0061] In one embodiment, the first generating sub-device is adjusted based on the gray-white ratio, including: based on the gray-white ratio and the to-be-calibrated Lignacott blackness sub-grade, adjusting the power of the first generating sub-device and the flow of the black smoke simulation liquid into the first generating sub-device to change the concentration of the first concentration black smoke.

[0062] Specifically, after detecting the gray-white ratio of the first concentration black smoke through the camera, the detection result of the gray-white ratio of the first concentration black smoke is compared with the standard gray-white ratio required by the to-be-calibrated Lignacott blackness sub-grade. If the detected gray-white ratio is inconsistent with the required standard gray-white ratio, the power parameter in the first generating sub-device is adjusted (for example, the power of the high-frequency piezoelectric ceramic array is adjusted), and the flow of the black smoke simulation liquid into the first generating sub-device is changed (by controlling the flow of the liquid pump). It should be noted that the power adjustment of the first generating sub-device can affect the atomization effect of the black smoke simulation liquid, and the flow adjustment of the first generating sub-device can change the amount of liquid entering the atomization unit, and the two work together to change the concentration of the first concentration black smoke, so that it is closer to the standard concentration required by the to-be-calibrated Lignacott blackness sub-grade.

[0063] In one embodiment, the second generating sub-device is adjusted based on the gray-white ratio, including: based on the gray-white ratio and the to-be-calibrated Lignacott blackness sub-grade, adjusting the flow rate of the auxiliary gas in the second generating sub-device and the flow of the black smoke simulation liquid into the second generating sub-device to change the concentration of the second concentration black smoke.

[0064] ​After the camera detects the gray-white ratio of the second black smoke concentration, the result is compared with the standard gray-white ratio required for the Ringelmann blackness sub-level to be calibrated. If the actual gray-white ratio does not match the standard gray-white ratio, the flow rate of the auxiliary gas (e.g., sheath gas) in the second generation sub-unit and the flow rate of the black smoke simulating liquid entering the second generation sub-unit are adjusted (by controlling the flow rate of the liquid pump). It should be noted that changing the auxiliary gas flow rate can affect the intensity of the negative pressure generated by the Bernoulli effect, thereby changing the atomization effect of the black smoke simulating liquid; adjusting the flow rate of the black smoke simulating liquid entering the second generation sub-unit can adjust the thickness of the air curtain and the black smoke concentration. Through this dual adjustment mechanism, the second generation sub-unit can precisely adjust the concentration of the second black smoke concentration to more closely match the standard concentration required for the Ringelmann blackness sub-level to be calibrated, thereby ensuring calibration accuracy.

[0065] In one embodiment, the first reference levels in the first level set are all smaller than the second reference levels in the second level set; and the number of first reference levels in the first level set is smaller than the number of second reference levels in the second level set.

[0066] Specifically, the first reference level in the first level set includes Ringelmann blackness levels 1, 2, and 3, and the second reference level in the second level set includes Ringelmann blackness levels 4 and 5. Therefore, any first reference level in the first level set is lower than any second reference level in the second level set.

[0067] In terms of quantity, the first-level set contains 3 reference levels, while the second-level set contains 2 reference levels, so the number of reference levels in the first-level set is greater than that in the second-level set.

[0068] In this embodiment, by setting the levels and numbers of the first level set and the second level set, the black smoke generating device can be accurately calibrated using different generating sub-devices and atomization modes for different ranges and numbers of blackness levels.

[0069] In one embodiment, Figure 2 As shown, based on the Ringelmann blackness sub-level to be calibrated and the Ringelmann blackness total level to be calibrated, a black smoke simulation liquid is configured, including:

[0070] Step 201: The total Ringelmann blackness level to be calibrated includes multiple Ringelmann blackness sub-levels to be calibrated, the reference level in the total Ringelmann blackness level to be calibrated is a sub-level in the multiple Ringelmann blackness sub-levels to be calibrated, and the sub-levels in the total Ringelmann blackness level to be calibrated cover the blackness levels that can be detected by the Ringelmann blackness detection device.

[0071] Specifically, the to-be-calibrated LMG sub-grades can represent different concentrations of the black smoke grades. For example, the to-be-calibrated LMG total grades can include LMG Grade 1, LMG Grade 2, LMG Grade 3, LMG Grade 4 and LMG Grade 5, each of which corresponds to an independent to-be-calibrated LMG sub-grade.

[0072] Among the to-be-calibrated LMG sub-grades, a specific to-be-calibrated LMG sub-grade can be selected as a reference grade, which is used as a benchmark or reference point in the calibration process. The reference grade can be any to-be-calibrated LMG sub-grade in the to-be-calibrated LMG total grades, which, together with other to-be-calibrated LMG sub-grades, covers the entire range of blackness grades that can be detected by the LMG detection device.

[0073] Step 202: Determine whether the to-be-calibrated LMG sub-grade is the reference grade in the to-be-calibrated LMG total grades.

[0074] The current to-be-calibrated LMG sub-grade is obtained and compared with the reference grade in the to-be-calibrated LMG total grades. If they are consistent, the current to-be-calibrated sub-grade is the reference grade; if they are not consistent, the current to-be-calibrated sub-grade is not the reference grade.

[0075] Step 203: If no, determine the offset position of the to-be-calibrated LMG sub-grade relative to the reference grade; and configure the black smoke simulation liquid based on the offset position.

[0076] If the to-be-calibrated LMG sub-grade is not the reference grade, the offset position of the to-be-calibrated LMG sub-grade relative to the reference grade needs to be determined. For example, assuming that the reference grade is Grade 3 and the to-be-calibrated sub-grade is Grade 2, the offset position is -1; if it is Grade 4, the offset position is +1.

[0077] Based on the offset position, the concentration of the black smoke simulation liquid is adjusted. If the offset is negative (for example, -1), it means that the black smoke concentration needs to be reduced. Conversely, a positive offset requires an increase in the black smoke concentration. After adjustment, the black smoke concentration is verified again to ensure that it meets the requirements of the to-be-calibrated grade.

[0078] Based on the same concept, the embodiments of the present application also provide a black smoke generation device for an LMG detection device, which is part of the LMG detection device. The device comprises:

[0079] The first generation sub-device 310 is configured to generate black smoke of a first concentration.

[0080] The second generation sub-device 320 is configured to generate black smoke of a second concentration; and the first generation sub-device 310 and the second generation sub-device 320 do not work at the same time.

[0081] The first pump-valve group 330 is connected to the first generating sub-device 310 and the second generating sub-device 320 respectively, and is used to send the configured black smoke simulation liquid into the first generating sub-device 310 or the second generating sub-device 320 so that the first generating sub-device 310 or the second generating sub-device 320 generates black smoke of corresponding concentration;

[0082] Control unit 340: used to execute the above-mentioned black smoke generation control method for the Ringelmann blackness detection device.

[0083] In one embodiment, Figure 3 Shown and Figure 4 The figure shows the electrical connection diagram and piping connection diagram of the black smoke generating device. The black smoke generating device used in the Ringelmann blackness detection device also includes a solution mixing sub-device 350, which includes multiple first containers 351 for holding different base liquids, a second container 352 for holding black smoke simulating liquid, and a second pump-valve assembly 353. The multiple first containers 351 are connected to the second container 352 via the second pump-valve assembly 353, and the second container 352 is connected to the first pump-valve assembly 330. The concentration of the black smoke simulating liquid in the second container 352 can be adjusted by adjusting the flow parameters of the second pump-valve assembly 353.

[0084] The solution mixing sub-device 350 in the black smoke generating device includes multiple first containers 351, a second container 352, and a second pump-valve assembly 353. Each of the first containers 351 is independent and used to store different types of base liquids, including ink, solvents (e.g., ethylene glycol), surfactants (e.g., polyvinyl pyrrolidone), etc. Each first container 351 is connected to a second pump-valve assembly 353 via a pipeline, which in turn is connected to the second container 352. The second container 352 stores the final mixed black smoke simulating liquid.

[0085] When a specific concentration of black smoke simulating liquid is required, the required base liquid and its proportion are determined based on the Ringelmann blackness scale to be calibrated. By controlling the flow parameters of the individual pumps and valves in the second pump-valve assembly 353, the base liquids in the different first containers 351 are delivered to the second container 352 at precise flow rates. In the second container 352, the base liquids are thoroughly mixed using a magnetic stirrer to form a uniform black smoke simulating liquid.

[0086] In this embodiment, the solution mixing sub-device 350 can flexibly adjust the composition and concentration of the black smoke simulating liquid to meet the calibration requirements of different Ringelmann blackness levels.

[0087] In an embodiment, the solution mixing sub-device 350 further comprises a refractometer 354 configured to obtain the concentration of the black smoke simulation liquid in the second container 352, and the control unit 340 is configured to adjust the flow parameter of the second pump valve group 353 based on the concentration obtained by the refractometer 354, so as to change the proportion of different base liquids in the second container 352; wherein the solution mixing sub-device 350 comprises at least three first containers 351 for placing corresponding base liquids, and the concentration of one of the different base liquids can be determined by the refractometer 354, and the concentration of the base liquid is related to the sub-grade of the Linke Mann blackness to be calibrated.

[0088] The refractometer 354 is installed on the second container 352 to monitor the concentration of the black smoke simulation liquid in real time. After the refractometer 354 obtains the concentration data of the black smoke simulation liquid, the concentration data is transmitted to the control unit 340. The control unit 340 compares the preset concentration standard with the actually measured concentration value, automatically calculates and generates a control signal, and acts on the second pump valve group 353 to accurately adjust the flow parameter of each base liquid flowing into the second container 352, so as to accurately control the proportion of different base liquids in the second container 352.

[0089] It should be noted that the solution mixing sub-device 350 comprises at least three first containers 351 for storing corresponding base liquids. The concentration of one of the base liquids (for example, ink) can be determined by the refractometer 354, and the concentration of the liquid is directly related to the sub-grade of the Linke Mann blackness to be calibrated. Other base liquids (for example, solvent and active agent) are matched according to needs to cooperatively adjust the final concentration of the black smoke simulation liquid to meet the calibration needs of different Linke Mann blackness grades.

[0090] In an embodiment, the black smoke generating device further comprises a self-cleaning sub-device 360, the self-cleaning sub-device 360 comprises a cleaning tank 361 and an air compressor 362, the first pump valve group 330 is a gas-liquid pump valve group, and the cleaning tank 361 and the air compressor 362 are connected with the first pump valve group 330; wherein the liquid pump in the first pump valve group 330 can extract water source in the cleaning tank 361 to clean the pipelines in the first generating sub-device 310 and the second generating sub-device 320; after cleaning the pipelines in the first generating sub-device 310 and the second generating sub-device 320, the air compressor 362 can perform pulse back blowing to the pipelines in the first generating sub-device 310 and the second generating sub-device 320 through the gas pump in the first pump valve group 330.

[0091] The self-cleaning sub-device 360 in the black smoke generating device includes a cleaning tank 361 and an air compressor 362, which are mainly used for cleaning and drying the pipelines of the first generating sub-device 310 and the second generating sub-device 320. The cleaning tank 361 contains pure water. When cleaning is needed, the liquid pump in the first pump valve group 330 will extract the pure water in the cleaning tank 361, and then deliver the pure water to the pipelines of the first generating sub-device 310 and the second generating sub-device 320, so as to thoroughly wash the pipelines and remove the black smoke simulation liquid or other impurities that may be left.

[0092] After the water washing step is completed, the air compressor 362 starts to work. The air compressor 362 delivers compressed air to the pipelines of the first generating sub-device 310 and the second generating sub-device 320 through the gas pump in the first pump valve group 330. The compressed air enters the pipelines in the form of pulses, which can effectively dry the water in the pipelines and further remove the impurities that may be left in the pipelines.

[0093] In this embodiment, the self-cleaning sub-device 360 can automatically clean and dry the pipelines after each calibration or black smoke generation task is completed, so as to ensure the long-term stable operation of the device and avoid affecting the calibration or black smoke generation effect of the next time due to pipeline blockage or residues.

[0094] In one embodiment, the first generating sub-device 310 converts the black smoke simulation liquid into droplets through a high-frequency piezoelectric ceramic array, and converts the droplets into the first concentration black smoke through the nozzle in the first generating sub-device 310; the second generating sub-device 320 converts the black smoke simulation liquid into droplets based on the Bernoulli effect through a Venturi tube, and converts the droplets into the second concentration black smoke through the nozzle in the second generating sub-device 320; wherein the solution mixing sub-device 350 further includes a heating module, the heating module is located at least at the bottom of the second container 352, the second container 352 is provided with a stirrer, and the heating module is heated at least when the stirrer is working, and the temperature in the second container 352 is controlled within a target range.

[0095] The black smoke generating device includes the first generating sub-device 310 and the second generating sub-device 320, which are respectively responsible for generating black smoke of different concentrations. The first generating sub-device 310 converts the black smoke simulation liquid into droplets through a high-frequency piezoelectric ceramic array. These droplets form an air curtain after being sprayed out through the nozzle in the device, which is the first concentration black smoke. The second generating sub-device 320 converts the black smoke simulation liquid into droplets based on the Bernoulli effect through a Venturi tube structure, and then sprays out through the nozzle to form the second concentration black smoke.

[0096] In addition, the solution mixing sub-device 350 is also equipped with a heating module, which is installed at least at the bottom of the second container 352. A stirrer is installed inside the second container 352. When the stirrer is running, the heating module is activated simultaneously to heat the solution. The operation of the heating module can maintain the temperature within the second container 352 within the set target range, ensuring that the solution mixing process is carried out at an appropriate temperature to achieve the ideal mixing effect. The heating module and stirrer are not shown in the figure.

[0097] In one embodiment, Figure 5 The figure shows a piping diagram for the black smoke generation device. The solution mixing sub-device 350 comprises multiple first containers for storing base liquids such as inks and solvents. These first containers are connected to a second pump-valve assembly via pipes. The second pump-valve assembly can be a flow / pump assembly consisting of multiple pumps and valves, which controls the flow of the base liquids and delivers the different liquids proportionally to the second containers. The second container is a larger circular container equipped with an agitator for mixing the base liquids to form the black smoke simulating liquid. A heating module is located at the bottom of the container to maintain the set temperature during stirring to ensure effective mixing. Arrows indicate the direction of liquid flow. Figure 5 Also shown are an ultrasonic generator, an annular array of nozzles, and a honeycomb outlet. These components are used to convert the black smoke simulating liquid into droplets and form black smoke. Furthermore, the self-cleaning device 360 ​​also includes a cleaning tank and an air compressor. The cleaning liquid in the cleaning tank is pumped by the liquid pump in the first pump valve group. The first pump valve group can be an air / liquid pump valve group used to clean the pipelines in the first and second generating sub-devices. After cleaning, the air compressor uses the gas pump in the first pump valve group to pulse back-purge air into the pipelines to prevent nozzle clogging. The first generating sub-device can be an ultrasonic black smoke generating device, and the second generating sub-device can be a jet-type black smoke generating device.

[0098] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A black smoke generation control method for a Ringelmann blackness detection device, characterized in that: The method is applied to a black smoke generating device, which is a part of the Ringelmann blackness detection device, and comprises: Obtaining a Ringelmann blackness sub-level to be calibrated, and configuring a concentration of a black smoke simulation liquid based on the Ringelmann blackness sub-level to be calibrated and the Ringelmann blackness total level to be calibrated; Matching the Ringelmann blackness sub-level to be calibrated with the reference levels in the first level set and the second level set respectively; If the to-be-calibrated Ringelmann blackness sub-level matches any first reference level in the first level set, the black smoke simulation liquid is controlled to enter the first generation sub-device, and the first generation sub-device is activated to generate black smoke of a first concentration; if the to-be-calibrated Ringelmann blackness sub-level matches any second reference level in the second level set, the black smoke simulation liquid is controlled to enter the second generation sub-device, and the second generation sub-device is activated to generate black smoke of a second concentration; the first generation sub-device and the second generation sub-device do not operate simultaneously, and the first generation sub-device and the second generation sub-device respectively execute different black smoke generation modes, and the first concentration of black smoke generated by the black smoke generation mode executed by the first generation device is lower than the second concentration of black smoke generated by the black smoke generation mode executed by the second generation device; Obtain a camera for Ringelmann blackness plate comparison, a gray-white ratio of the detected first-concentration black smoke or second-concentration black smoke, and adjust the corresponding first generation sub-device or second generation sub-device based on the gray-white ratio.

2. The black smoke generation control method for the Ringelmann blackness detection device according to claim 1, characterized in that: Adjusting the first generating sub-device or the second generating sub-device based on the grayscale ratio includes: Based on the gray-white ratio and the Ringelmann blackness sub-level to be calibrated, adjusting the power of the first generation sub-device and the flow rate of the black smoke simulation liquid entering the first generation sub-device to change the concentration of the first concentration black smoke; and / or, Based on the gray-white ratio and the Ringelmann blackness sub-level to be calibrated, the flow rate of the auxiliary gas in the second generation sub-device and the flow rate of the black smoke simulation liquid entering the second generation sub-device are adjusted to change the concentration of the second concentration black smoke.

3. The black smoke generation control method for the Ringelmann blackness detection device according to claim 1, characterized in that: The first reference levels in the first level set are all smaller than the second reference levels in the second level set; and the number of first reference levels in the first level set is smaller than the number of second reference levels in the second level set.

4. The black smoke generation control method for the Ringelmann blackness detection device according to claim 1, characterized in that: Based on the Ringelmann blackness sub-level to be calibrated and the Ringelmann blackness total level to be calibrated, a black smoke simulation liquid is configured, including: The total Ringelmann blackness level to be calibrated includes a plurality of Ringelmann blackness sub-levels to be calibrated, the reference level in the total Ringelmann blackness level to be calibrated is a sub-level in the plurality of Ringelmann blackness sub-levels to be calibrated, and the sub-levels in the total Ringelmann blackness level to be calibrated cover the blackness levels detectable by the Ringelmann blackness detection device; determining whether the Ringelmann blackness sub-level to be calibrated is a reference level in the Ringelmann blackness total level to be calibrated; If not, determining the offset position of the Ringelmann blackness sub-level to be calibrated relative to the reference level; A black smoke simulating liquid is configured based on the offset position.

5. A black smoke generating device for a Ringelmann blackness detection device, characterized in that: The black smoke generating device is a part of the Ringelmann blackness detection device, and the black smoke generating device includes: a first generating sub-device, for generating black smoke of a first concentration; a second generating sub-device, configured to generate black smoke of a second concentration; wherein the first generating sub-device and the second generating sub-device do not operate simultaneously; a first pump-valve group, connected to the first generating sub-device and the second generating sub-device respectively, for delivering the configured black smoke simulation liquid into the first generating sub-device or the second generating sub-device so that the first generating sub-device or the second generating sub-device generates black smoke of corresponding concentration; A control unit for executing the steps of the black smoke generation control method for a Ringelmann blackness detection device according to any one of claims 1 to 4.

6. The black smoke generating device for the Ringelmann blackness detection device according to claim 5, characterized in that: The black smoke generating device further comprises a solution mixing sub-device, wherein the solution mixing sub-device comprises a plurality of first containers for placing different base liquids, a second container for placing black smoke simulating liquid, and a second pump valve group; The plurality of first containers are connected to the second container via the second pump valve group, and the second container is connected to the first pump valve group; the concentration of the black smoke simulation liquid in the second container is changed by adjusting the flow parameters of the second pump valve group.

7. The black smoke generating device for the Ringelmann blackness detection device according to claim 6, characterized in that: The solution mixing sub-device further includes a refractometer, which acts on the second container to obtain the concentration of the black smoke simulating liquid. The control unit is used to adjust the flow parameters of the second pump valve group based on the concentration obtained by the refractometer to change the proportions of the different base liquids in the second container. The solution mixing sub-device includes at least three first containers for placing corresponding base liquids, the concentration of one of the different base liquids can be determined by the refractometer, and the concentration of the base liquid is related to the Ringelmann blackness sub-level to be calibrated.

8. The black smoke generating device for the Ringelmann blackness detection device according to claim 5, characterized in that: The black smoke generating device further includes a self-cleaning sub-device, which includes a cleaning tank and an air compressor. The first pump-valve group is a gas-liquid pump-valve group, and the cleaning tank and the air compressor are both connected to the first pump-valve group. Among them, the liquid pump in the first pump-valve group can extract the water source in the cleaning tank to clean the pipelines in the first generating sub-device and the second generating sub-device; after cleaning the pipelines in the first generating sub-device and the second generating sub-device, the air compressor can perform pulse backblowing to the pipelines in the first generating sub-device and the second generating sub-device through the gas pump in the first pump-valve group.

9. The black smoke generating device for the Ringelmann blackness detection device according to claim 6, characterized in that: The first generating sub-device converts the black smoke simulating liquid into droplets through a high-frequency piezoelectric ceramic array, and converts the droplets into black smoke of the first concentration through a nozzle in the first generating sub-device; the second generating sub-device converts the black smoke simulating liquid into droplets through a Venturi tube based on the Bernoulli effect, and converts the droplets into black smoke of the second concentration through a nozzle in the second generating sub-device; The solution mixing sub-device further includes a heating module, which is located at least at the bottom of the second container. An agitator is provided in the second container. The heating module heats at least when the agitator is working, and controls the temperature in the second container within a target range.

Images