A nozzle atomization detection device and its usage method

Abstract

This invention discloses a nozzle atomization detection device and its usage method, including a detection box, a control device, an atomization device, a vision device, a detection device, and a drying device. The control device includes a main control box, a display module, a control module, and a button module. The control module includes a water temperature preset module, a water temperature analysis module, an image detection thread module, an image processing module, an image region extraction module, a region circle fitting module, a data processing module, and a data analysis module. The vision device includes a camera. The atomization device, vision device, detection device, drying device, and display module execute corresponding programs according to the operation instructions of the control module. This invention automatically detects the nozzle atomization range and automatically judges the quality of the nozzle, thereby reducing worker visual fatigue, reducing human influence factors, saving manpower, improving production efficiency, and improving the accuracy of detection results.

Description

Technical Field

[0001] This invention belongs to the field of nozzle testing technology, and relates to a nozzle atomization testing device and its usage method. Background Technology

[0002] In the nozzle testing project, the atomization range of the nozzle is an important indicator. A qualified nozzle can disinfect and sterilize the designated area around the toilet by atomizing the nozzle. At present, the industry generally still uses manual visual observation of the atomization range of the nozzle to judge whether the nozzle is qualified. In the continuous testing process, it is easy to cause visual fatigue and affect the accuracy of the nozzle judgment. Moreover, manual judgment is subject to human influence and the testing efficiency is low. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a nozzle atomization detection device and a method of using it.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a nozzle atomization detection device and a method of use, comprising a detection box, a control device, an atomization device, a vision device, a detection device, and a drying device. The control device includes a main control box, a display module, a control module, and a button module. The control module includes a water temperature preset module, a water temperature analysis module, an image detection thread module, an image processing module, an image region extraction module, a region circle fitting module, a data processing module, and a data analysis module. The vision device includes a camera. The atomization device, vision device, detection device, drying device, and display module execute corresponding programs according to the operation instructions of the control module.

[0005] Furthermore, the display module, control module, and button module are respectively installed in the main control box. The display module includes a touch screen, which serves as the display interface for nozzle atomization data and nozzle discrimination results, as well as the operation interface for the control module. The button module, as part of the control module, is used to control the nozzle atomization detection device to execute the corresponding program. The button module includes a water source switch, an air source switch, a power switch, an emergency stop switch, and a temperature adjustment button.

[0006] Furthermore, the atomizing device includes a water pipe assembly, an atomizing nozzle, an instantaneous water inlet heating control valve, an atomizing nozzle control solenoid valve, an induction coil, and an induction coil support. The atomizing nozzle is mounted in the testing box via a nozzle mounting base. The water pipe assembly is also mounted in the testing box. The water pipe assembly includes a high-pressure cold water inlet pipe, a constant-temperature water pipe, and an atomizing nozzle inlet pipe. The inlet of the atomizing nozzle inlet pipe is connected to the outlet of the atomizing nozzle control solenoid valve, and the outlet of the atomizing nozzle inlet pipe is connected to the atomizing nozzle. The constant-temperature water pipe is connected to the inlet of the atomizing nozzle control solenoid valve. The atomizing nozzle control solenoid valve controls the flow of water between the constant-temperature water pipe and the atomizing nozzle inlet pipe, and controls the water flow rate. The constant-temperature water pipe is connected to the outlet of the instantaneous water inlet heating control valve, and the high-pressure cold water inlet pipe is connected to the inlet of the instantaneous heating control valve.

[0007] Furthermore, the induction coil is mounted on an induction coil bracket, which is mounted on a detection box. The induction coil is designed as a hollow frustum structure, comprising an upper part and a lower part. The diameter of the upper part of the induction coil is smaller than the diameter of the lower part. The upper part of the induction coil is connected to the induction coil bracket, and the atomizing nozzle is located on the center line of the induction coil, on one side of the upper part of the induction coil.

[0008] Furthermore, the surface of the induction coil is coated with a thermal coating.

[0009] Furthermore, the detection box includes an outer shell and a water tank. The induction coil bracket is installed on the outer shell, the atomizing nozzle control solenoid valve is installed on the outer shell through a fixing block, the water inlet instant heating control valve is installed on the nozzle fixing seat, and the water tank is fixedly connected to the outer shell through a connecting assembly.

[0010] Furthermore, the water tank is located inside the outer casing, the induction coil is located inside the water tank, the lower end surface of the water tank is set as an inclined surface, and the water tank is provided with a water outlet.

[0011] Furthermore, the air drying device includes an air knife support and an air drying knife. The air drying knife is fixed on the air knife support and includes an air port located inside the induction coil support and facing the induction coil. The air drying knife is externally connected to a vacuum generator.

[0012] A method for using a nozzle atomization detection device includes the following steps:

[0013] Step 1: Pre-processing of nozzle atomization detection equipment to confirm that the communication between the control device, atomization device, vision device, and drying device is normal and that the operation status is normal;

[0014] Step 2: Set the heating temperature of the inlet instantaneous heating control valve to T1;

[0015] Step 3: The instantaneous heating control valve for water inlet and the solenoid valve for atomizing nozzle are activated. The atomizing nozzle sprays water mist onto the surface of the thermal coating of the induction coil. The temperature at which the water mist contacts the surface of the thermal coating is T2. The temperature at which the thermal coating reacts with heat is set to T0. T2 and T0 are compared. If T2 is not less than T0, the thermal coating of the induction coil reacts with color, and step 4 is executed. If T2 is less than T0, the thermal coating of the induction coil does not react with color, and step 2 is executed to reset T1.

[0016] Step 4: The camera captures and processes images;

[0017] The visual lifting mechanism controls the camera to descend. During this process, the contact switch contacts the outer casing and sends a stop signal. The control module receives the signal and controls the lifting servo motor to stop running, stopping the camera at the set shooting position, and the camera captures the image.

[0018] The camera captures images in the set high-resolution mode, and crops, filters, displays, and saves the images according to the set ROI area;

[0019] Step 5: The image detection thread module of the control module creates an image detection thread. The image detection thread is used to manage the acquisition data of camera images, analyze and judge the data, output the results, and execute the corresponding actions.

[0020] Step 6: The control module starts the drying device, and the air knife blows the water mist inside and on the induction coil to dry it and cool it down.

[0021] Step 7: End the testing process for one atomizing nozzle.

[0022] Furthermore, step 5 includes the following steps:

[0023] Step 5.1: The image detection thread module receives the image processed in step 4 and performs binarization on the image to obtain the image to be tested;

[0024] Step 5.2: Extract the induction coil support area from the image to be tested. The induction coil support area is set as G1. Based on G1, the edge of the induction coil support 37 is obtained and a circle is fitted to obtain the image diameter D1 of the induction coil support in the image to be tested.

[0025] Step 5.2: Extract the color region of the induction coil in the image to be tested. The color region is set as G3. Based on G3, obtain the edge of the color region and perform circle fitting to obtain the image diameter D3 of the color region in the image to be tested.

[0026] Step 5.3: Extract the induction coil region from the image to be tested. The induction coil region is set as G2. Based on G2, the edge of the induction coil region is obtained and a circle is fitted to obtain the image diameter D2 of the induction coil region in the image to be tested.

[0027] Step 5.4: Convert the image diameter D1 of the induction coil support 37, the image diameter D3 of the color display area, and the image diameter D2 of the induction coil area into actual diameter dimensions D10, D30, and D20 respectively.

[0028] Step 5.5: Obtain the ratio P of the color rendering area relative to the entire induction coil;

[0029] Step 5.6: Compare P with the proportional threshold P0. If P is not greater than P0, the atomizing nozzle is determined to be a qualified product, removed, and placed in the qualified product area. If P is greater than P0, the atomizing nozzle is determined to be a defective product, removed, and placed in the defective product area. The test result is then displayed on the touchscreen.

[0030] In summary, the advantages of this invention are:

[0031] This invention reduces worker visual fatigue, minimizes human error, saves manpower, improves production efficiency, and increases the accuracy of test results by automatically detecting the atomization range of the nozzle and automatically judging the quality of the nozzle.

[0032] The control module of this application records the judgment result of each atomizing nozzle and performs data statistics on the results of the same batch of atomizing nozzles. On the one hand, it realizes the classification, statistics and analysis of qualified and unqualified atomizing nozzles; on the other hand, it helps to statistically analyze atomizing nozzle quality problems and is conducive to improving the atomizing nozzle production process. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the nozzle atomization detection device of the present invention.

[0034] Figure 2 This is a schematic diagram of the nozzle atomization detection device of the present invention.

[0035] Figure 3 This is a schematic diagram of the nozzle atomization detection device of the present invention.

[0036] Figure 4 This is a half-sectional schematic diagram of the nozzle atomization detection device of the present invention.

[0037] Figure 5 This is a schematic diagram of the image to be tested according to the present invention.

[0038] Figure 6 This is a schematic diagram of camera detection according to the present invention.

[0039] Figure 7 This is a flowchart illustrating the usage method of the nozzle atomization detection device of the present invention.

[0040] Figure 8 This is a flowchart of the image detection thread of the present invention. Detailed Implementation

[0041] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0042] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0043] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, lateral, longitudinal, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0044] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0045] Example 1:

[0046] like Figure 1-4 As shown, a nozzle atomization detection device includes a detection box 2, a control device, an atomization device, a vision device, and a drying device. The control device includes a main control box 11, a display module, a control module, and a button module 13. The display module, control module, and button module 13 are respectively installed in the main control box 11. The display module includes a touch screen 12, which serves as the display interface for nozzle atomization data and nozzle identification results, and also as the operation interface for the control module. The button module 13 is part of the control module and is used to control the nozzle atomization detection device to execute corresponding programs. In this embodiment, the button module 13 includes a water source switch 131, an air source switch 132, a power switch 133, and an emergency stop switch 134.

[0047] The nozzle atomization testing equipment also includes a pre-processing module, which is used to verify the communication and operating status between the control device, atomization device, vision device, and drying device.

[0048] The control module is used by the user to perform various instruction operations or input setting information. The control module includes a water temperature preset module, a water temperature analysis module, an image detection thread module, an image processing module, an image region extraction module, a region circle fitting module, a data processing module, and a data analysis module.

[0049] The water temperature preset module is used to set the heating temperature of the water inlet instantaneous heating control valve 35;

[0050] The water temperature analysis module is used to analyze and determine the temperature when water mist comes into contact with the surface of the thermosensitive coating and the temperature at which the thermosensitive coating reacts with heat to produce a color reaction, output the results and execute the corresponding actions.

[0051] The image detection thread module is used to manage the acquisition data of images from the camera 56, as well as to analyze, judge, output results and execute corresponding actions.

[0052] The image processing module performs binarization on the image processed by the camera to obtain the image to be tested;

[0053] The image region extraction module is used to extract the color display area of ​​the induction coil support 37 region, the induction coil 36 region, and the induction coil 36 region from the image to be tested.

[0054] The region circle fitting module is used to perform circle fitting on the regions extracted by the image region extraction module and to obtain region size data.

[0055] The data processing module has a built-in algorithm for processing area size data to obtain the proportion of the color display area;

[0056] The data processing module has a built-in color rendering area ratio threshold, which is used to analyze the color rendering area ratio and the ratio threshold to obtain the quality analysis results of the atomizing nozzle 30, and to perform corresponding actions based on the results.

[0057] The atomizing device, vision device, drying device, and display module execute corresponding programs according to the operation instructions of the control module;

[0058] The atomizing device includes a water pipe assembly, an atomizing nozzle 30, an instantaneous water inlet heating control valve 35, an atomizing nozzle control solenoid valve 34, an induction coil 36, and an induction coil bracket 37. The atomizing nozzle 30 is mounted on the testing box 2 via a nozzle mounting base 301. The water pipe assembly is also mounted on the testing box 2. The water pipe assembly includes a high-pressure cold water inlet pipe 31, a constant-temperature water pipe 32, and an atomizing nozzle inlet pipe 33. The inlet of the atomizing nozzle inlet pipe 33 is connected to the outlet of the atomizing nozzle control solenoid valve 34, and the outlet of the atomizing nozzle inlet pipe 33 is connected to the atomizing nozzle 30. The warm water pipe 32 is connected to the inlet of the atomizing nozzle control solenoid valve 34. The atomizing nozzle control solenoid valve 34 controls the flow of water between the constant temperature water pipe 32 and the atomizing nozzle inlet pipe 33, and controls the water rate. The constant temperature water pipe 32 is connected to the outlet of the inlet instant heating control valve 35. The high-pressure cold water inlet pipe 31 is connected to the inlet of the instant heating control valve 35. The instant heating control valve 35 heats the water entering the high-pressure cold water inlet pipe 31. The heated water is atomized by the atomizing nozzle 30 through the constant temperature water pipe 32 and the atomizing nozzle inlet pipe 33.

[0059] The main control box 11 may also be equipped with a temperature adjustment button, which is used to adjust the water temperature.

[0060] The induction coil 36 is mounted on the induction coil bracket 37, which is mounted on the detection box 2. In this embodiment, the induction coil 36 is designed as a hollow frustum structure to facilitate the detachment of water mist on the induction coil 36 under the action of gravity. The induction coil 36 includes an upper part 361 and a lower part 362. The diameter of the upper part 361 is smaller than the diameter of the lower part 362. The upper part 361 of the induction coil 36 is connected to the induction coil bracket 37. The atomizing nozzle 30 is located on the center line of the induction coil 36 and is located on one side of the upper part 361 of the induction coil 36. Under the condition of ensuring the same parameters, including water pressure and water flow velocity, the closer the contact position between the water mist of the atomizing nozzle 30 and the induction coil 36 is to the upper part 361, the larger the atomization range of the atomizing nozzle 30.

[0061] In this embodiment, the surface of the induction coil 36 is coated with a thermosensitive coating. The thermosensitive coating undergoes a color reaction when heated, which facilitates the observation and reaction of subsequent images. The color of the color reaction can be blue or pink, which can be set according to actual needs. The instantaneous heating control valve 35 heats the water entering the high-pressure cold water inlet pipe 31. The heating temperature is greater than 50 degrees Celsius. When the water mist comes into contact with the thermosensitive coating, the temperature of the water mist is higher than 35 degrees Celsius to ensure that the thermosensitive coating can undergo a color reaction.

[0062] In this embodiment, two sets of atomizing devices are provided to accelerate the detection efficiency.

[0063] The detection box 2 includes an outer shell 21 and a water tank 22. An induction coil bracket 37 is installed on the outer shell 21. An atomizing nozzle control solenoid valve 34 is installed on the outer shell 21 via a fixing block. An instantaneous water inlet heating control valve 35 is installed on the nozzle fixing seat 301. In this embodiment, the water tank 22 is fixedly connected to the outer shell 21 via a connecting assembly. Specifically, the connecting assembly includes a first plate 251, a second plate 252, a horizontal plate 24, and a vertical plate 23. The first plate 251 and the second plate 252 are fixedly installed on the side of the water tank 22. One end of the horizontal plate 24 is located between the first plate 251, restricting the lateral movement of the horizontal plate 24. At the same time, it is located above the second plate 252. The second plate 252 supports the horizontal plate 24 upwards. One end of the horizontal plate 24 is fixedly connected to the vertical plate 23. The vertical plate 23 is fixedly connected to the outer shell 21, thereby realizing the fixed connection between the outer shell 21 and the water tank 22. In this embodiment, the nozzle fixing seat 301 is positioned and installed on the horizontal plate 24.

[0064] The water tank 22 is located inside the outer shell 21, and the induction coil 36 is located inside the water tank 22. In this embodiment, the lower end face of the water tank 22 is set as an inclined surface. The water tank 22 is provided with a water outlet 222. After the water mist condenses, it moves along the lower end face under the action of gravity and finally flows out through the water outlet 222. The water that flows out can be reused to improve the water utilization rate.

[0065] The induction coil bracket 37 is positioned and installed with the outer shell 21. Specifically, the induction coil bracket 37 has bracket positioning grooves 371 on both sides, and the outer shell 21 has side plates 211. The side plates 211 are fastened into the bracket positioning grooves 371. When the induction coil 36 is located in the outer shell 21 and the induction coil bracket 37 is installed with the outer shell 21, the side plates 211 support the induction coil bracket 37 upwards, and at the same time play a role in positioning the induction coil bracket 37 with the outer shell 21.

[0066] The air drying device includes an air knife bracket 41 and an air drying knife 42. The air drying knife 42 is fixed to the air knife bracket 41 and includes an air port located inside the induction coil bracket 37 and facing the induction coil 36. The air drying knife 42 is externally connected to a vacuum generator. After completing one atomizing nozzle 30 detection, the vacuum generator is activated, and the air drying knife 42 blows air into the induction coil 36 through the air port. This not only dries the water mist inside and on the induction coil 36, but also lowers the temperature of the induction coil 36, causing the display on the induction coil 36 to fade, facilitating the next atomizing nozzle 30 detection. In this application, a group of induction coils 36 is equipped with several air drying knives 42 to shorten the cooling time and improve the efficiency of atomizing nozzle 30 detection.

[0067] The vision device includes a vision lifting mechanism, a positioning mechanism, and a camera 56. The vision lifting mechanism is mounted on the housing 21 via a lifting bracket 51. The vision lifting mechanism includes a lifting servo motor 52, a ball screw 53, and a slider 55. The lifting servo motor 52 is fixed to the lifting bracket 51, and the power output shaft of the lifting servo motor 52 is connected to the ball screw 53. The slider 55 is connected to the ball screw 53 and slidably connected to the lifting bracket 51. The camera 56 is fixed to the lifting bracket 51. When the lifting servo motor 52 is started, it drives the ball screw 53 to rotate through the power output shaft, causing the slider 55 to move up and down, thereby moving the camera 56.

[0068] The camera 56 includes an image acquisition module and an image processing module. The image acquisition module is used to acquire images. The image acquisition module and the image processing module are connected. The image processing module is used to crop, filter, display and save the received images. The image processing module is connected to the control module and transmits the processed images to the control module for further processing.

[0069] In this embodiment, a set of cameras 56 corresponds to a set of induction coils 36.

[0070] The positioning mechanism includes a contact switch 54, which is fixed on the lower end face of the slider 55. The contact switch 54 is connected to the lifting servo motor 52 and moves up and down with the slider 55. When the contact switch 54 contacts the housing 21, the contact switch 54 sends a stop signal. The control module receives the signal and controls the lifting servo motor 52 to stop running, thereby achieving precise control of the position of the camera 56.

[0071] like Figure 5-8 This application also provides a method for using a nozzle atomization detection device, specifically including the following steps:

[0072] Step 1: Pre-processing of nozzle atomization detection equipment to confirm that the communication between the control device, atomization device, vision device, and drying device is normal and that the operation status is normal;

[0073] Step 2: Set the heating temperature of the inlet instantaneous heating control valve 35 to T1;

[0074] Step 3: The instantaneous water inlet heating control valve 35 and the atomizing nozzle control solenoid valve 34 are activated, and the atomizing nozzle 30 sprays water mist onto the surface of the thermal coating of the induction coil 36. The temperature when the water mist comes into contact with the surface of the thermal coating is T2; the temperature at which the thermal coating reacts with heat is set to T0. T2 and T0 are compared. If T2 is not less than T0, the thermal coating of the induction coil 36 reacts with color, and step 4 is executed. If T2 is less than T0, the thermal coating of the induction coil 36 does not react with color, and step 2 is executed to reset T1.

[0075] Step 4: Camera 56 acquires and processes images;

[0076] The visual lifting mechanism controls the camera 56 to descend. During this process, the contact switch 54 contacts the housing 21 and sends a stop signal. The control module receives the signal and controls the lifting servo motor 52 to stop running, stopping the camera 56 at the set shooting position, and the camera 56 captures the image.

[0077] Camera 56 captures images in the set high-resolution mode, and crops, filters, displays, and saves the images according to the set ROI area.

[0078] Step 5: The image detection thread module of the control module creates an image detection thread. The image detection thread is used to manage the acquisition data of the camera 56 images, analyze and judge the data, output the results, and execute the corresponding actions.

[0079] Step 6: The control module starts the drying device. The air drying knife 42 blows the water mist inside and on the induction coil 36 to dry it and cool the induction coil 36.

[0080] Step 7: End the testing process for one atomizing nozzle 30.

[0081] Step 5 includes the following steps:

[0082] Step 5.1: The image detection thread module receives the image processed in step 4 and performs binarization on the image to obtain the image to be tested;

[0083] Step 5.2: Extract the region of induction coil support 37 in the image to be tested. Set the region of induction coil support 37 as G1. Based on G1, obtain the edge of induction coil support 37 and perform circle fitting to obtain the image diameter D1 of induction coil support 37 in the image to be tested.

[0084] To facilitate the extraction of the induction coil support 37 area, in this embodiment the induction coil support 37 is set to yellow, and the induction coil support 37 is displayed as yellow in the image to be tested;

[0085] Step 5.2: Extract the color-developing area of ​​the induction coil 36 in the image to be tested. The color-developing area is set as G3. Based on G3, obtain the edge of the color-developing area and perform circle fitting to obtain the image diameter D3 of the color-developing area in the image to be tested.

[0086] To facilitate the extraction of the colorimetric region, the colorimetric reaction is set to blue in this embodiment, and the colorimetric region is displayed as blue in the image to be tested;

[0087] Step 5.3: Extract the sensor coil 36 region from the image to be tested. The sensor coil 36 region is set as G2. Based on G2, the edge of the sensor coil 36 region is obtained and a circle is fitted to obtain the image diameter D2 of the sensor coil 36 region in the image to be tested.

[0088] Step 5.4: Convert the image diameter D1 of the induction coil support 37, the image diameter D3 of the color display area, and the image diameter D2 of the induction coil 36 area into actual diameter dimensions D10, D30, and D20 respectively.

[0089] D10 = D1 × M1;

[0090] D30 = D3 × M3; (1)

[0091] D20 = D2 × M2;

[0092] In equation (1), Mi (i = 1, 2, 3) is the conversion coefficient of camera 56. Where Hi is the height value, H1 is the height between the camera 56 and the sensor coil bracket 37, H2 is the height between the camera 56 and the bottom of the sensor coil 36, H1 is the height between the camera 56 and the color display area, H1 and H2 are known values, a is the field of view of the camera 56, Rw is the resolution of the camera 56, and when the camera 56 acquires images, a and Rw are known values.

[0093]

[0094] In equation (2), b is a known value related to the shape of the induction coil 36, thus yielding equation (3).

[0095]

[0096] Step 5.5: Obtain the ratio P of the color rendering area relative to the entire induction coil 36;

[0097]

[0098]

[0099]

[0100] In the above formula, P1 is the position ratio of the induction coil 36 to the induction coil support 37, L3 is the distance between the induction coil 36 and the induction coil support 37, i.e. the overall range, P1 and L3 are corresponding coefficient values, P2 is the position ratio of the color display area to the induction coil support 37, L0 is the distance between the color display area and the induction coil support 37, i.e. the color display range, P2 and L0 are based on the same coefficient correspondence, thus formula (6) can be obtained;

[0101] Step 5.6: Determine the relationship between P and the proportional threshold P0. If P is not greater than P0, the atomizing nozzle 30 is determined to be a qualified product. Remove the atomizing nozzle 30 and place it in the qualified product area. If P is greater than P0, the atomizing nozzle 30 is determined to be a defective product. Remove the atomizing nozzle 30 and place it in the defective product area. Display the test result on the touch screen 12.

[0102] The control module of this application records the judgment result of each atomizing nozzle 30 and performs data statistics on the results of the same batch of atomizing nozzles 30. On the one hand, it realizes the classification, statistics and analysis of qualified and unqualified atomizing nozzles 30; on the other hand, it helps to statistically analyze the quality problems of atomizing nozzles 30 and is conducive to improving the production process of atomizing nozzles 30.

[0103] This application also provides an image processing method for a nozzle atomization detection device, specifically including the following steps:

[0104] Step S1: Camera 56 acquires and processes images;

[0105] The visual lifting mechanism controls the camera 56 to descend. During this process, the contact switch 54 contacts the housing 21 and sends a stop signal. The control module receives the signal and controls the lifting servo motor 52 to stop running, stopping the camera 56 at the set shooting position, and the camera 56 captures the image.

[0106] Camera 56 captures images in the set high-resolution mode, and crops, filters, displays, and saves the images according to the set ROI area.

[0107] Step S2: Binarize the image processed in step S1 to obtain the image to be tested;

[0108] Step S3: Extract the region of the induction coil support 37 in the image to be tested. The region of the induction coil support 37 is set as G1. Based on G1, obtain the edge of the induction coil support 37 and perform circle fitting to obtain the image diameter D1 of the induction coil support 37 in the image to be tested.

[0109] To facilitate the extraction of the induction coil support 37 area, in this embodiment the induction coil support 37 is set to yellow, and the induction coil support 37 is displayed as yellow in the image to be tested;

[0110] Step S4: Extract the color-developing area of ​​the induction coil 36 in the image to be tested. The color-developing area is set as G3. Based on G3, obtain the edge of the color-developing area and perform circle fitting to obtain the image diameter D3 of the color-developing area in the image to be tested.

[0111] To facilitate the extraction of the colorimetric region, the colorimetric reaction is set to blue in this embodiment, and the colorimetric region is displayed as blue in the image to be tested;

[0112] Step S5: Extract the sensor coil 36 region from the image to be tested. The sensor coil 36 region is set as G2. Based on G2, obtain the edge of the sensor coil 36 region and perform circle fitting to obtain the image diameter D2 of the sensor coil 36 region in the image to be tested.

[0113] Step S6: Convert the image diameter D1 of the induction coil support 37, the image diameter D3 of the color display area, and the image diameter D2 of the induction coil 36 area into actual diameter dimensions D10, D30, and D20 respectively.

[0114] D10 = D1 × M1;

[0115] D30 = D3 × M3; (1)

[0116] D20 = D2 × M2;

[0117] In equation (1), Mi (i = 1, 2, 3) is the conversion coefficient of camera 56. Where Hi is the height value, H1 is the height between the camera 56 and the sensor coil bracket 37, H2 is the height between the camera 56 and the bottom of the sensor coil 36, H1 is the height between the camera 56 and the color display area, H1 and H2 are known values, a is the field of view of the camera 56, Rw is the resolution of the camera 56, and when the camera 56 acquires images, a and Rw are known values.

[0118]

[0119] In equation (2), b is a known value related to the shape of the induction coil 36, thus yielding equation (3).

[0120]

[0121] Step 5.5: Obtain the ratio P of the color rendering area relative to the entire induction coil 36;

[0122]

[0123]

[0124]

[0125] In the above formula, P1 is the position ratio of the induction coil 36 to the induction coil support 37, L3 is the distance between the induction coil 36 and the induction coil support 37, i.e. the overall range, P1 and L3 are corresponding coefficient values, P2 is the position ratio of the color display area to the induction coil support 37, L0 is the distance between the color display area and the induction coil support 37, i.e. the color display range, P2 and L0 are based on the same coefficient correspondence, thus formula (6) can be obtained;

[0126] Step S7: Determine whether P is greater than the proportional threshold P0. If P is not greater than P0, then the atomizing nozzle 30 is determined to be a qualified product. Remove the atomizing nozzle 30 and place it in the qualified product area. If P is greater than P0, then the atomizing nozzle 30 is determined to be a defective product. Remove the atomizing nozzle 30 and place it in the defective product area.

[0127] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

Claims

1. A method for using a nozzle atomization detection device, characterized in that: The nozzle atomization detection equipment includes a detection box, a control device, an atomization device, a vision device, a detection unit, and a drying device. The control device includes a main control box, a display module, a control module, and a button module. The control module includes a water temperature preset module, a water temperature analysis module, an image detection thread module, an image processing module, an image region extraction module, a region circle fitting module, a data processing module, and a data analysis module. The vision device includes a camera. The atomization device, vision device, detection device, drying device, and display module execute corresponding programs according to the operation instructions of the control module. The display module includes a touch screen. The atomization device package... The system includes a water pipe assembly, an atomizing nozzle, an instantaneous water inlet heating control valve, an atomizing nozzle control solenoid valve, an induction coil, and an induction coil support. The induction coil is mounted on the induction coil support, which is mounted on a testing box. The induction coil is a hollow frustum structure, consisting of an upper and a lower part. The upper diameter of the induction coil is smaller than the lower diameter. The upper part of the induction coil is connected to the induction coil support. The atomizing nozzle is located on the center line of the induction coil, on one side of the upper part of the induction coil. The surface of the induction coil is coated with a heat-sensitive coating. The testing box includes an outer shell and a water tank. The air drying device includes an air knife support and an air drying knife. The method of use includes the following steps: Step 1: Pre-processing of nozzle atomization detection equipment to confirm that the communication between the control device, atomization device, vision device, and drying device is normal and that the operation status is normal; Step 2: Set the heating temperature of the inlet instantaneous heating control valve. The heating temperature is set to... ; Step 3: The instantaneous water inlet heating control valve and the atomizing nozzle control solenoid valve are activated, and the atomizing nozzle sprays water mist onto the surface of the heat-sensitive coating of the induction coil. The temperature of the water mist upon contact with the heat-sensitive coating surface is... The temperature at which the heat-sensitive coating undergoes a color reaction upon heating is set as... ,judge and ,like Not less than If the thermal coating of the induction coil undergoes a color reaction, proceed to step 4. Less than If the thermal coating of the induction coil does not react with color, proceed to step 2 to reset. ; Step 4: The camera captures and processes images; The visual lifting mechanism controls the camera to descend. During this process, the contact switch contacts the outer casing and sends a stop signal. The control module receives the signal and controls the lifting servo motor to stop running, stopping the camera at the set shooting position, and the camera captures the image. The camera captures images in the set high-resolution mode, and crops, filters, displays, and saves the images according to the set ROI area; Step 5: The image detection thread module of the control module creates an image detection thread. The image detection thread is used to manage the acquisition data of camera images, analyze and judge the data, output the results, and execute the corresponding actions. Step 5 includes the following steps: Step 5.1: The image detection thread module receives the image processed in step 4 and performs binarization on the image to obtain the image to be tested; Step 5.2: Extract the induction coil support region from the image to be tested. The induction coil support region is set as... ,according to The edge of the induction coil support is obtained, and a circle fit is performed to obtain the image diameter of the induction coil support in the image to be measured. ; Step 5.3: Extract the colorimetric region of the induction coil in the image to be tested, and set the colorimetric region as... ,according to The edges of the colored regions are obtained, and circle fitting is performed to obtain the image diameter of the colored regions in the image under test. ; Step 5.4: Extract the induction coil region from the image to be tested. The induction coil region is set as... ,according to The edge of the induction coil region is obtained, and a circle fit is performed to obtain the image diameter of the induction coil region in the image under test. ; Step 5.5: Adjust the image diameter of the induction coil support. Image diameter of the color rendering area and the image diameter of the induction coil area Converted sequentially to actual diameter dimensions , and ; Step 5.6: Obtain the ratio of the color rendering area to the entire induction coil. ; Step 5.7: Determine with the ratio threshold , if is not greater than , then determine that the atomizing nozzle is a qualified product, remove the atomizing nozzle, and place it in the qualified product area. If is greater than , then determine that the atomizing nozzle is a non - qualified product, remove the atomizing nozzle, place it in the non - qualified product area, and display the test result on the touch screen; Step 6: The control module starts the drying device, and the air knife blows the water mist inside and on the induction coil to dry it and cool it down. Step 7: End the testing process for one atomizing nozzle.

2. The method of using a nozzle atomization detection device according to claim 1, characterized in that: The display module, control module, and button module are respectively installed in the main control box. The touch screen serves as the display interface for nozzle atomization data and nozzle identification results, as well as the operation interface for the control module. The button module, as part of the control module, is used to control the nozzle atomization detection device to execute the corresponding program. The button module includes a water source switch, an air source switch, a power switch, an emergency stop switch, and a temperature adjustment button.

3. The method of using the nozzle atomization detection device according to claim 1, characterized in that: The atomizing nozzle is mounted on the testing box via a nozzle mounting base. The water pipe assembly is also mounted on the testing box. The water pipe assembly includes a high-pressure cold water inlet pipe, a constant-temperature water pipe, and an atomizing nozzle inlet pipe. The inlet of the atomizing nozzle inlet pipe is connected to the outlet of the atomizing nozzle control solenoid valve, and the outlet of the atomizing nozzle inlet pipe is connected to the atomizing nozzle. The constant-temperature water pipe is connected to the inlet of the atomizing nozzle control solenoid valve. The atomizing nozzle control solenoid valve controls the flow of water between the constant-temperature water pipe and the atomizing nozzle inlet pipe, and controls the water flow rate. The constant-temperature water pipe is connected to the outlet of the instantaneous heating control valve, and the high-pressure cold water inlet pipe is connected to the inlet of the instantaneous heating control valve.

4. The method of using the nozzle atomization detection device according to claim 3, characterized in that: The induction coil bracket is mounted on the outer shell, the atomizing nozzle control solenoid valve is mounted on the outer shell via a fixing block, the water inlet instant heating control valve is mounted on the nozzle fixing seat, and the water tank is fixedly connected to the outer shell via a connecting assembly.

5. The method of using a nozzle atomization detection device according to claim 4, characterized in that: The water tank is located inside the outer shell, the induction coil is located inside the water tank, the lower end surface of the water tank is set as an inclined surface, and the water tank is provided with a water outlet.

6. The method of using a nozzle atomization detection device according to claim 1, characterized in that: The air-drying knife is fixed on the air knife bracket. The air-drying knife includes an air port, which is located inside the induction coil bracket and faces the induction coil. The air-drying knife is externally connected to a vacuum generator.

Images