Fertilizer Particle Size Monitoring System Based on Image Recognition Technology

Abstract

This invention provides a fertilizer granule size detection system based on image recognition technology. The system includes a rotary drum granulator, a discharge monitoring chamber, a feeding conveyor, and a discharge conveyor. A storage hopper is located at the end of the discharge conveyor. Both the storage hopper and the discharge monitoring chamber are equipped with monitoring components for monitoring the size of the fertilizer granules. A control center connected to the monitoring components is also installed on the discharge monitoring chamber. A humidity control component connected to the control center is installed on the rotary drum granulator. This invention adjusts the size of the compound fertilizer granules produced by the rotary drum granulator based on the size of the discharged material and the finished compound fertilizer granules. This eliminates the need for workers to judge the size of the compound fertilizer granules based on experience, and also eliminates the need for workers to manually control the amount of steam and water applied, thereby saving labor costs and reducing the labor intensity of workers.

Description

Technical Field

[0001] This invention relates to the field of fertilizer production technology, and more specifically to a fertilizer particle size monitoring system based on image recognition technology. Background Technology

[0002] Compound fertilizers are chemical fertilizers containing two or more of the following nutrients: nitrogen, phosphorus, and potassium. They have advantages such as high nutrient content, few by-products, and good physical properties. They play a very important role in balancing fertilization, improving fertilizer utilization, and promoting high and stable crop yields.

[0003] Existing compound fertilizer granulation processes include rotary drum granulation, disc granulation, spray granulation, and high tower granulation. Among all compound fertilizer granulation processes, rotary drum granulation is favored by many compound fertilizer manufacturers and is being adopted by more and more compound fertilizer manufacturers due to its advantages such as relatively small formula restrictions, high output, low investment, and short construction period.

[0004] However, in the existing rotary drum granulation process, particle size adjustment relies on worker experience and judgment. Specifically, workers assess the particle size of the compound fertilizer discharged from the rotary drum granulator. If the worker determines the particles are too small, they manually adjust the valve opening to increase the steam content or water flow within the granulator. Conversely, if the worker determines the particles are too large, they manually adjust the valve opening to decrease the steam content or water flow. However, worker judgment is prone to error, resulting in a significant discrepancy between the obtained fertilizer particle size and the specified particle size.

[0005] In addition, since the compound fertilizer discharged from the rotary drum granulator needs to be dried, and the particle size of the compound fertilizer will change during the drying process, it will be different from the particle size of the compound fertilizer discharged from the rotary drum granulator. Therefore, it is difficult to control the particle size of the finished compound fertilizer, and the quality of the finished compound fertilizer is difficult to guarantee.

[0006] Therefore, this invention proposes a fertilizer particle size monitoring system based on image recognition technology to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a fertilizer particle size monitoring system based on image recognition technology. By monitoring the particle size of the finished compound fertilizer, the system can regulate the amount of steam and water sprayed, thereby solving the problem in the background art that it is difficult to control the particle size of the finished compound fertilizer and to guarantee the quality of the finished compound fertilizer.

[0008] To achieve the above objectives, the specific technical solution is as follows: This invention proposes a fertilizer particle size monitoring system based on image recognition technology, comprising a rotary drum granulator, a discharge monitoring bin installed at the discharge end of the rotary drum granulator, a feeding conveyor located at the discharge bin of the discharge monitoring bin, and a discharge conveyor located at the discharge end of a drying device at the end of the feeding conveyor; wherein, the end of the discharge conveyor is provided with a storage bin capable of automatic sampling; the discharge monitoring bin and the storage bin are equipped with monitoring components for monitoring fertilizer particles; a control center connected to the monitoring components is installed on the discharge monitoring bin; and a humidity control component connected to the control center is installed on the rotary drum granulator; The control center includes a central processing module connected to the monitoring component for data analysis of images and issuing instructions; an image processing unit connected to the central processing module for processing photos taken by the monitoring component; a storage unit for storing photos of standard fertilizer particle sizes; and a control module connected to the humidity control component for adjusting and controlling the monitoring component for cleaning and wiping according to instructions from the central processing module.

[0009] More preferably, the rotary drum granulator includes a rotary drum base frame, a rotary drum support movably mounted on the rotary drum base frame, a rotary drum roller movably mounted on the rotary drum support, a rotary drum driven gear disposed on the rotary drum roller, a rotary drum motor mounted on the rotary drum base frame, and a rotary drum drive gear mounted on the rotary drum motor and meshing with the rotary drum driven gear; the humidity regulating component is mounted on the rotary drum roller; and the discharge monitoring bin is mounted on the rotary drum base frame.

[0010] More preferably, the humidity regulating component includes a movable ring on the drum, a steam pipe and a water pipe installed on the movable ring, and an electric regulating valve installed on the steam pipe and water pipe and connected to the regulating control module; the drum is provided with several blind holes communicating with the inner cavity of the drum; the drum support includes a drum support frame and a drum support wheel movably installed on the drum support frame; the present invention can regulate the humidity inside the drum granulator and regulate the fertilizer granules granulated by the drum granulator through the humidity regulating component.

[0011] Further preferably, the drum roller is provided with a venting groove communicating with the blind hole; a limiting ring is installed on the groove wall of the venting groove, and a turntable bearing is installed on the limiting ring; the movable ring is installed on the turntable bearing; a drum guide ring corresponding to the drum support wheel is installed on the drum roller; the present invention allows steam and clean water from the steam pipe and water pipe to enter the drum roller through the venting groove and blind hole for granulation particle adjustment; through the turntable bearing, the water pipe and steam pipe can rotate relative to the drum roller, so that when the drum roller rotates, the water pipe and steam pipe will not rotate and cause interference.

[0012] More preferably, the drying device includes a drying base frame, a drying support frame mounted on the drying base frame, a drying support wheel movably mounted on the drying support frame, a drying rotary body mounted on the drying support wheel, a drying driven gear mounted on the drying rotary body, a drying motor mounted on the drying base frame, and a drying main gear mounted on the drying motor and meshing with the drying driven gear; a plurality of target hammers are installed on the drying rotary body at equal angles and intervals.

[0013] Further preferably, the drying rotary body is equipped with a drying guide ring corresponding to the drying support wheel; the target hammer includes a target straight pipe installed on the drying rotary body, a target curved pipe installed on the target straight pipe with an angle greater than 100° and less than 160°, a buffer pipe installed on the target curved pipe, a target ball rolling inside the target straight pipe, the target curved pipe and the buffer pipe, and a buffer spring installed on the buffer pipe; the present invention, through the setting of the target hammer, strikes the drying rotary body, preventing compound fertilizer particles from adhering to the inside of the drying rotary body, and can buffer the target ball inside, preventing cracks from appearing at the pipe connection after long-term striking, causing the target ball to fall out, thereby extending the service life of the target hammer.

[0014] More preferably, the monitoring components include a front monitoring component installed on the discharge monitoring hopper and a rear monitoring component installed on the storage hopper; the front monitoring component includes a protective shell installed on the side wall of the discharge monitoring hopper, a front recognition camera installed inside the protective shell and connected to the central processing module, and several sets of front dustproof structures installed on the protective shell and connected to the adjustment and control module; the protective shell is provided with guide grooves; the present invention monitors the size of compound fertilizer particles after granulation by the rotary drum granulator and the size of compound fertilizer particles after drying by setting the monitoring components.

[0015] More preferably, the front dustproof structure includes a telescopic cylinder installed on the top of the protective shell and connected to the adjustment control module, a transparent plate installed on the telescopic cylinder and adapted to the guide groove, a cleaning chamber installed on the bottom of the protective shell and connected to the inside of the protective shell, and several cleaning sponges installed on the top of the cleaning chamber; several obstruction ramps are arranged at equal intervals in the discharge monitoring chamber; the cleaning chamber is provided with a water exchange port; the present invention, through the setting of the front dustproof structure, protects the front recognition camera from dust, preventing dust generated during the production process from adhering to the lens of the front recognition camera, avoiding errors during shooting, and avoiding errors in subsequent adjustments.

[0016] More preferably, the storage bin includes a storage bin body, a feeding frame installed at the top of the storage bin body at an angle of 1° to 10° to the top surface of the storage bin body, a feeding trough located at the end of the feeding frame away from the top surface of the storage bin body, a sampling trough located at the end of the feeding frame near the top surface of the storage bin body, an adjusting chamber installed on the side of the storage bin body and connected to the feeding frame, a sampling baffle installed inside the adjusting chamber and forming an angle of 11° to 20° with the feeding frame, a sampling cylinder installed on the other side of the storage bin body and connected to the sampling baffle, a sampling tube installed on the storage bin body and connected to the sampling trough, and a switch valve installed at the bottom of the sampling tube; the rear monitoring component is installed on the feeding frame.

[0017] More preferably, the rear monitoring component includes a wiping cylinder mounted on the feed frame, a wiping block mounted on the wiping cylinder, a mounting shell mounted on the feed frame and located between the bottom of the feed frame and the wiping cylinder, a rear camera mounted inside the mounting shell, and a dustproof transparent plate mounted on the feed frame. This invention uses the wiping block and the dustproof transparent plate to protect the rear camera from dust, preventing dust generated during production from adhering to the lens of the front recognition camera, thus avoiding errors during shooting and subsequent adjustments. A further preferred embodiment is a control method for a fertilizer particle size detection system based on image recognition technology, wherein the control method is as follows: Step 1: The compound fertilizer raw materials enter the rotary drum granulator from the feed end. The electric regulating valve opens according to the preset program, so that steam and water are input into the rotary drum granulator through the steam pipe and water pipe. At the same time, the rotary drum motor drives the rotary drum to rotate for granulation. Step 2: The compound fertilizer granules that have been granulated in the rotary drum granulator fall out of the discharge end of the rotary drum granulator and enter the discharge monitoring bin. They fall onto the baffle plate. The front monitoring component, which can automatically clean at equal time intervals, takes pictures of the compound fertilizer granules on the baffle plate. The pictures are processed and analyzed by the control center to obtain the compound fertilizer granule size conformity rate and the distribution of unqualified products. Step 3: Based on the distribution of non-conforming compound fertilizer granules, the control center adjusts the opening of the electric regulating valve and regulates the humidity inside the rotary drum granulator. Step 4: The compound fertilizer granules that have passed through the discharge monitoring bin fall onto the feeding conveyor, which transports them to the drying device for drying. Step 5: The drying motor in the drying device drives the drying rotary body to rotate, which in turn drives the hammer to strike the drying rotary body; Step 6: The dried compound fertilizer granules fall onto the discharge conveyor, which transports the dried compound fertilizer granules, whose particle size has been determined, to the storage silo. Step 7: The sampling baffle in the feeding hopper extends out, and the rear monitoring component, which can automatically wipe at equal time intervals, takes pictures of the compound fertilizer particles on the sampling baffle. The pictures are then processed and analyzed by the control center to obtain the compound fertilizer particle size compliance rate and the distribution of non-conforming products. Step 8: Based on the distribution results of non-conforming compound fertilizer granules obtained in Step 7, the control center readjusts the opening of the electric regulating valve; thereby regulating the humidity inside the rotary drum granulator to ensure that the granulated compound fertilizer granules meet the requirements, thus improving product quality.

[0018] Further optionally, the adjustment range of the electric regulating valve in step eight is smaller than that of the electric regulating valve in step three; the shooting interval of the rear monitoring component in step seven is the time from when the compound fertilizer granules leave the rotary drum granulator to when they leave the storage bin; the shooting interval of the front monitoring component in step two is the time taken for the compound fertilizer raw materials to go from entering the rotary drum granulator to leaving the rotary drum granulator.

[0019] Compared with existing technologies, the present invention provides a fertilizer particle size monitoring system based on image recognition technology, which has the following beneficial effects: This fertilizer particle size monitoring system, based on image recognition technology, can send images of the compound fertilizer particles output from a rotary drum granulator to a control center. The control center then compares these images with sample photos and adjusts the humidity control components to regulate the humidity within the rotary drum granulator, thereby regulating the particle size. Furthermore, by monitoring the dried compound fertilizer particles again and adjusting the humidity within the granulator, the system ensures that the particle size of the finished compound fertilizer product after drying is within the standard range, improving product quality. In addition, this system eliminates the need for workers to judge particle size based on experience or manually control the amount of steam and water applied, thus saving labor costs and reducing worker workload. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the fertilizer particle size detection system based on image recognition technology of the present invention; Figure 2 This is a schematic diagram of the rotary drum granulator in this invention; Figure 3 This is a schematic diagram of the structure of the rotary drum and humidity control assembly in this invention; Figure 4 In this invention Figure 3 A magnified view of a section at point A in the middle; Figure 5This is a schematic diagram of the drying device in this invention; Figure 6 This is a schematic diagram of the target hammer in this invention; Figure 7 This is a schematic diagram of the front monitoring component and the discharge monitoring chamber in this invention; Figure 8 This is a cross-sectional view of the front monitoring component in this invention; Figure 9 This is a schematic diagram of the protective shell structure in this invention; Figure 10 This is a schematic diagram of the storage bin structure in this invention; Figure 11 This is a schematic diagram of the storage bin from another perspective in this invention; Figure 12 This is a schematic diagram of the feed frame structure in this invention; Figure 13 In this invention Figure 12 A magnified view of a section at point B in the middle; Figure 14 This is a schematic diagram of the control center's operating principle.

[0021] The diagram shows: 1. Rotary drum granulator; 11. Rotary drum base frame; 12. Rotary drum support component; 121. Rotary drum support frame; 122. Rotary drum support wheel; 13. Rotary drum drum; 131. Blind hole; 132. Ventilation groove; 133. Limiting ring; 134. Turntable bearing; 135. Rotary drum guide ring; 14. Rotary drum driven gear; 15. Rotary drum motor; 16. Rotary drum drive gear; 2. Discharge monitoring bin; 21. Barrier inclined plate; 3. Inlet... 4. Material conveyor; 4. Drying device; 41. Drying base frame; 42. Drying support frame; 43. Drying support wheel; 44. Drying rotary body; 45. Drying driven gear; 46. Drying motor; 47. Drying main gear; 48. Target hammer; 481. Target straight pipe; 482. Target bent pipe; 483. Buffer pipe; 484. Target ball; 485. Buffer spring; 5. Storage bin; 51. Storage bin body; 52. Feed frame; 52 1. Feed chute; 522. Sampling chute; 53. Adjustment chamber; 54. Sampling baffle; 55. Sampling cylinder; 56. Sampling tube; 57. Switch valve; 6. Monitoring components; 61. Front monitoring components; 611. Protective housing; 6111. Guide groove; 612. Front recognition camera; 62. Rear monitoring components; 621. Wiping cylinder; 622. Wiping block; 623. Mounting housing; 624. Rear camera; 625. Protective 63. Dustproof transparent panel; 631. Front dustproof structure; 632. Telescopic cylinder; 633. Transparent panel; 634. Cleaning chamber; 635. Cleaning sponge; 636. Water exchange port; 7. Control center; 71. Central processing module; 72. Image processing unit; 73. Storage unit; 74. Adjustment control module; 8. Humidity adjustment component; 81. Movable ring; 82. Steam pipe; 83. Water pipe; 84. Electric regulating valve; 9. Discharge conveyor. Detailed Implementation

[0022] The invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Many specific details are set forth in the following description to provide a thorough understanding of the invention. However, the invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0023] The fertilizer particle size monitoring system based on image recognition technology of the present invention can be applied to monitoring the size of fertilizer particles and other similar applications. The fertilizer particle size monitoring system based on image recognition technology will be described in detail below.

[0024] See appendix Figure 1 — Figure 7The diagram shows a preferred embodiment of the fertilizer particle size monitoring system based on image recognition technology of the present invention. This fertilizer particle size monitoring system based on image recognition technology includes a rotary drum granulator 1, a discharge monitoring chamber 2 installed at the discharge end of the rotary drum granulator 1, a feeding conveyor 3 located at the discharge point of the discharge monitoring chamber 2, a drying device 4 located at the end of the feeding conveyor 3, and a storage hopper 5 located at the end of the drying device 4 capable of automatic sampling. The discharge monitoring chamber 2 and the storage hopper 5 are equipped with monitoring components 6 for detecting fertilizer particles. A control center 7 connected to the monitoring components 6 is installed on the discharge monitoring chamber 2. A humidity regulating component 8 connected to the control center 7 is installed on the rotary drum granulator 1. The present invention, through the setting of the storage hopper 5, can automatically sample the finished compound fertilizer particles, thereby facilitating the sampling and analysis of the finished compound fertilizer particles by workers and reducing the labor intensity of workers; through the setting of the monitoring component 6, it can... The compound fertilizer granules discharged from the rotary drum granulator 1 and the drying device 4 are monitored to monitor the size of the compound fertilizer granules and obtain data on the size of the compound fertilizer granules. This data is used to adjust the amount of steam and water applied inside the rotary drum granulator 1. Through the settings of the control center 7, the size of the compound fertilizer granules in the images captured by the monitoring component 6 is compared with the size of the compound fertilizer granules in the sample photos to obtain analysis results. Based on the analysis results, the humidity adjustment component 8 is used to adjust the amount of steam and water applied to the rotary drum granulator 1. This eliminates the need for workers to make judgments based on their experience, thereby improving the accuracy and speed of adjustment, ensuring that the size of the compound fertilizer granules meets the requirements, and reducing labor costs and the labor intensity of workers. The feeding conveyor 3 and the discharging conveyor 9 in this invention are belt conveyors in the prior art.

[0025] See appendix Figure 1 and Figure 14As shown, in this invention, the control center 7 includes a central processing module 71 connected to the monitoring component 6 for data analysis and issuing commands; an image processing unit 72 connected to the central processing module 71 for processing photos taken by the monitoring component; a storage unit 73 connected to the central processing module 71 for storing photos of standard fertilizer particle size; and an adjustment control module 74 connected to the humidity adjustment component for adjusting and controlling the humidity adjustment component according to commands from the central processing module, and for cleaning and wiping the monitoring component. This invention uses the storage unit 73 to store photos of the characteristic size of standard compound fertilizer particles; and the adjustment control module 74 controls the humidity adjustment component 8, adjusts the steam and water application in the rotary drum granulator 1, and adjusts the size of the formed compound fertilizer particles, thereby ensuring that the compound fertilizer particle size conforms to the specifications. The requirements are to improve the quality of compound fertilizer; the storage unit 73 stores samples of particle size, namely, photos of standard compound fertilizer particles taken by the front recognition camera 612 on the obstruction ramp 21, and photos of standard compound fertilizer particles taken by the rear monitoring component 62 on the sampling baffle 54; wherein, the front recognition camera 612 and the rear camera 624 in the monitoring component 6 are Olympus DP72 models, and the central processing module 71 controls the front recognition camera 612 and the rear camera 624 to take pictures, using CellSensStandard image capture software; the image processing unit 72 performs simple image processing by preprocessing the image by image filtering and image enhancement, and then performing image binarization; the central processing module 71 performs image recognition analysis using existing technologies such as the watershed algorithm to obtain particle feature parameters.

[0026] See appendix Figure 2 — Figure 4 As shown, in this invention, the rotary drum granulator 1 includes a rotary drum base frame 11, a rotary drum support 12 movably mounted on the rotary drum base frame 11, a rotary drum 13 movably mounted on the rotary drum support 12, a rotary drum driven gear 14 disposed on the rotary drum 13, a rotary drum motor 15 mounted on the rotary drum base frame 11 and located below the rotary drum 13, and a rotary drum driving gear 16 mounted on the rotary drum motor and meshing with the rotary drum driven gear 14; wherein, a humidity regulating component 8 is mounted on the rotary drum 13; and a discharge monitoring bin 2 is mounted on the rotary drum base frame 11. The feed inlet of the discharge monitoring bin 2 is located on the frame 11, and the discharge outlet of the rotary drum granulator 1 is corresponding to the discharge outlet of the rotary drum granulator 1. The present invention supports the rotary drum 13 by setting the rotary drum support member 12, and enables it to rotate. The rotary drum motor 15 provides the power source for the rotation of the rotary drum granulator 1, so that the rotary drum 13 can rotate to form compound fertilizer granules. The rotary drum drive gear 16 and the rotary drum driven gear 14 transmit the power of the rotary drum motor 15 to the rotary drum 13, so that the rotary drum 13 can rotate.

[0027] See appendix Figure 2 — Figure 4 As shown, in this invention, the humidity regulating component 8 includes a movable ring 81 movably mounted on the drum 13, a steam pipe 82 and a water pipe 83 equally spaced on the movable ring 81, and an electric regulating valve 84 mounted on the steam pipe 82 and water pipe 83 and connected to the regulating control module 74; the drum 13 is provided with a plurality of blind holes 131 equally spaced and communicating with the inner cavity of the drum 13; the drum support component 12 includes a drum support frame 121 and a drum support movably mounted on the drum support frame 121. Support wheel 122; wherein, the drum roller 13 is provided with a ventilation groove 132 communicating with the blind hole 131, and a limit ring 133 is installed on the groove wall of the ventilation groove 132, and a turntable bearing 134 is installed on the limit ring 133; a movable ring 81 is installed on the turntable bearing 134; a drum guide ring 135 corresponding to the drum support wheel 122 is installed on the drum roller 13; the present invention adds steam and clean water to the drum granulator 1 through the setting of steam pipe 82 and water pipe 83, and through the drum granulator The size of the granules formed in the rotary drum granulator 1 can be adjusted by regulating the steam and water volume within the granulator 1. The electric regulating valve 84 allows the regulating control module 74 to adjust the flow rates of the steam pipe 82 and water pipe 83, thereby regulating the steam and water volume within the rotary drum granulator 1 and thus the size of the granules formed. The blind hole 131, in conjunction with the ventilation slot 132, allows steam and clean water to enter the rotary drum granulator 1, thus regulating the size of the compound fertilizer granules. The particle size is adjusted; the installation position of the movable ring 81 is limited by the setting of the limiting ring 133, which facilitates the installation of the movable ring 81; the setting of the turntable bearing 134 makes the movable ring 81 and the drum 13 movably connected, and the movable ring 81 will not rotate when the drum 13 rotates, thereby avoiding interference between the steam pipe 82 and the water pipe 83; the setting of the drum guide ring 135, in conjunction with the drum support wheel 122, allows the drum 13 to rotate.

[0028] See appendix Figure 1 — Figure 6As shown, in this invention, the drying device 4 includes a drying base frame 41, a drying support frame 42 mounted on the drying base frame 41, a drying support wheel 43 movably mounted on the drying support frame 42, a drying rotary body 44 mounted on the drying support wheel 43, a drying driven gear 45 mounted on the drying rotary body 44, a drying motor 46 mounted on the drying base frame 41 and close to the drying driven gear 45, and a drying main gear 47 mounted on the drying motor 46 and meshing with the drying driven gear 45; wherein, a plurality of target hammers 48 are installed on the drying rotary body 44 at equal angles and intervals, and the target hammers 48 include mounting... The invention includes a target straight tube 481 mounted on the drying rotary body 44, a target bend 482 mounted on the target straight tube 481 with an angle greater than 100° and less than 160°, a buffer tube 483 mounted on the target bend 482, a target ball 484 rolled inside the target straight tube 481, the target bend 482, and the buffer tube 483, and a buffer spring 485 mounted on the buffer tube 483; a drying guide ring corresponding to the drying support wheel 43 is mounted on the drying rotary body 44; the invention, through the setting of the drying support wheel 43 and the drying guide ring, makes the drying rotary body 44 and the drying support frame 42 movably connected, drying... The rotating body 44 can rotate; the drying motor 46 provides the power source for the rotation of the drying rotating body 44; the driven gear 45 and the main gear 47 transmit the rotation of the drying rotating body 44, causing it to rotate; the hammer 48 strikes the outer wall of the drying rotating body 44, vibrating and separating the compound fertilizer adhering to the inner wall for normal discharge; the bend in the bend 482 buffers the bend in the bend, and when the hammer 48 rotates with the drying rotating body 44 to a position close to the ground... When the target ball 484 is at the face end, it will move towards the ground under the action of gravity. When it passes through the target bend 482, the kinetic energy converted from the gravitational potential energy of the target ball 484 will be buffered, reducing the impact force on the buffer tube 483 and preventing the weld of the buffer tube 483 from cracking, causing the target ball 484 to fall out and making it impossible to shoot. Through the setting of the buffer spring 485, the kinetic energy of the target ball 484 will be absorbed again, reducing the impact force at the weld of the sealed end face of the buffer tube 483, thereby protecting the target hammer, extending the service life of the target hammer, and without affecting the force of the target ball 484 striking the drying rotating body 44.

[0029] See appendix Figure 1 — Figure 13As shown, in this invention, the monitoring component 6 includes a front monitoring component 61 installed on the discharge monitoring bin 2 and a rear monitoring component 62 installed on the storage bin 5; wherein, the front monitoring component 61 includes a protective shell 611 installed on the side wall of the discharge monitoring bin 2, a front recognition camera 612 installed inside the protective shell 611 and connected to the central processing module 71, and several sets of front dustproof structures 63 installed on the protective shell 611 and connected to the adjustment control module 74, and the protective shell 611 is provided with a guide groove 6111; the present invention protects the front recognition camera 612 by setting the protective shell 611; The front dustproof structure 63 can block the dust generated during the compound fertilizer production process, preventing dust from adhering to the lens of the front recognition camera 612 and thus avoiding interference with the images captured by the front recognition camera 612, ensuring the clarity of the captured photos. Several sets of these structures can be used at intervals to prevent excessive dust adhering to the front dustproof structure 63 from affecting the capturing of the front recognition camera 612. The guide groove 6111 guides the movement of the transparent plate 632, facilitating the movement of the transparent plate 632 by the telescopic cylinder 631.

[0030] See appendix Figure 7 — Figure 9 As shown, in this invention, the front dustproof structure 63 includes a telescopic cylinder 631 installed on the top of the protective shell 611 and connected to the adjustment control module 74, a transparent plate 632 installed on the telescopic cylinder 631 and adapted to the guide groove 6111, a cleaning chamber 633 installed at the bottom of the protective shell 611 and connected to the interior of the protective shell 611, and several cleaning sponges 634 installed on the top of the cleaning chamber 633. Several obstruction ramps 21 are evenly spaced and staggered inside the discharge monitoring chamber 2. The cleaning chamber 633 is equipped with a water exchange port 635. This invention, through the installation of the telescopic cylinder 631, can drive the transparent plate 632... 32 moves, allowing the transparent plate 632 to be automatically cleaned; the cleaning chamber 633 allows the transparent plate 632 to be cleaned when the telescopic cylinder 631 drives it into the cleaning chamber 633; ​​the obstructing inclined plate 21 obstructs the compound fertilizer granules discharged from the rotary drum granulator 1, slowing their falling speed and facilitating the capture by the front recognition camera 612; the cleaning chamber 633 can be an ultrasonic cleaning chamber, and the water exchange port 635 is sealed with a sealing plug when it does not need to be replaced; the water in the cleaning chamber 633 can be replaced by the water exchange port 635.

[0031] See appendix Figure 1 — Figure 13As shown, in this invention, the storage bin 5 includes a storage bin body 51, a feeding frame 52 installed at the top of the storage bin body 51 at an angle of 1° to 10° to the top surface of the storage bin body 51, a feeding trough 521 disposed on the end of the feeding frame 52 away from the top surface of the storage bin body 51, a sampling trough 522 disposed on the end of the feeding frame 52 near the top surface of the storage bin body 51, an adjusting chamber 53 installed on the side of the storage bin body 51 and connected to the feeding frame 52, and a sampler installed in the adjusting chamber 53 at an angle of 11° to 20° to the feeding frame 52. The invention includes a sampling baffle 54, a sampling cylinder 55 connected to the sampling baffle 54 and installed on the other side of the storage hopper 51, a sampling tube 56 installed on the storage hopper 51 and connected to the sampling slot 522, and a switch valve 57 installed at the bottom of the sampling tube 56; wherein, the rear monitoring component 62 is installed on the feed frame 52; the invention allows the compound fertilizer finished granules to enter the storage hopper 51 through the feed slot 521 for temporary storage; and the sampling slot 522 allows... The compound fertilizer granules can be sampled and analyzed by entering the sampling tube 56 through the sampling slot 522. The adjustment chamber 53 provides a concealed position for the sampling baffle 54. When material storage is required, the sampling baffle 54 is hidden inside the adjustment chamber 53. During routine sampling at equal intervals, the sampling baffle 54 is pushed out, causing the compound fertilizer granules to fall onto the sampling baffle 54 and into the sampling slot 522. The sampling cylinder 55 allows the sampling baffle 54 to move. Power source; The rear monitoring component 62 facilitates the monitoring of compound fertilizer granules on the sampling baffle 54. Due to the large number of finished products at the time of discharge and the serious stacking between finished products, it is difficult to identify the particle size of the finished products in the photos taken by the camera. Therefore, some finished products on the sampling baffle 54 are sampled and monitored to improve the accuracy of identification, thereby improving the accuracy of the humidity adjustment component 8, improving the accuracy of the control of steam and water in the drum 13, and improving the quality of the compound fertilizer finished product.

[0032] See appendix Figure 12 and Figure 13As shown, in this invention, the rear monitoring component 62 includes a wiping cylinder 621 mounted on the feed frame 52, a wiping block 622 mounted on the wiping cylinder 621, a mounting shell 623 mounted on the feed frame 52 and located between the bottom surface of the feed frame 52 and the wiping cylinder 621, a rear camera 624 mounted inside the mounting shell 623, and a dustproof transparent plate 625 mounted on the feed frame 52. The wiping cylinder 621 allows the wiping block 622 to move and wipe the cleaned dustproof transparent plate 625, preventing water stains from affecting the recording of the rear camera 624. The dustproof transparent plate 625 also blocks dust in the workshop, preventing dust from adhering to the lens of the rear camera 624 and affecting its recording. Furthermore, cleaning the rear camera 624 can easily lead to water ingress, causing damage.

[0033] See appendix Figure 1 — Figure 14 As shown, the usage process of this invention is as follows: In the first step, the compound fertilizer raw materials enter the rotary drum 13 from the feed end of the rotary drum 13. The electric regulating valve 84 is opened according to the preset degree. Steam pipe 82 and water pipe 83 continuously input steam and clean water into the ventilation trough 132. At the same time, the rotary drum motor 15 drives the rotary drum driven gear 14 to rotate through the rotary drum drive gear 16. The rotary drum driven gear 14 drives the rotary drum 13 to rotate for granulation. In the second step, as the rotating drum 13 rotates, the granulated compound fertilizer granules enter the discharge monitoring chamber 2 through the discharge end of the rotating drum 13 and fall onto the baffle plate 21. At the same time, the front recognition camera 612 takes pictures of the compound fertilizer granules on the baffle plate 21 and transmits the captured images to the central processing module 71. The central processing module 71 then transmits the images to the image processing unit 72. After the image processing unit completes its processing, it transmits the images back to the central processing module 71. The central processing module 71 compares the images with the sample data in the storage unit 73 and performs data analysis to obtain the compound fertilizer granule size conformity rate and the distribution structure of unqualified products. Third, the central processing module 71 controls the opening of the electric regulating valve 84 in the humidity regulating component 8 by adjusting the control module 74 according to the compound fertilizer particle size conformity rate and the distribution structure of non-conforming products. That is, when the proportion of compound fertilizer particles larger than sample particles at the discharge end exceeds the specified proportion, the opening of the electric regulating valve 84 decreases; when the proportion of compound fertilizer particles smaller than sample particles at the discharge end exceeds the specified proportion, the opening of the electric regulating valve 84 increases. In the fourth step, the undried compound fertilizer granules fall from the bottom of the discharge monitoring chamber 2 onto the feeding conveyor 3, which then sends the undried compound fertilizer granules into the drying device 4. In the fifth step, the drying motor 46 drives the drying driven gear 45 to rotate through the drying main gear 47. The drying driven gear 45 drives the drying rotary body 44 to rotate, thus drying the compound fertilizer granules. At the same time, the rotation of the drying rotary body 44 drives the target hammer 48 to rotate. The target ball 484 inside the target hammer 48 strikes the drying rotary body 44, shaking off the fertilizer adhering to the drying rotary body 44 and reducing the compound fertilizer granules adhering to the inner wall of the drying rotary body 44. Step 6: The dried compound fertilizer granules are discharged from the discharge end of the drying rotary body 44 and fall onto the discharge conveyor 9. The discharge conveyor 9 transports the dried compound fertilizer granules with the determined particle size to the top of the storage bin 5. Step 7: The dried compound fertilizer falls from the discharge conveyor 9 into the feeding frame 52. Since the feeding frame 52 is at an angle of 1° to 10° to the top surface of the storage bin 51, the compound fertilizer will move towards the feeding trough 521 and enter the storage bin 51 through the feeding trough 521. When the sampling cylinder 55 pulls the sampling baffle 54 to extend, the extension rod of the wiping cylinder 621 retracts, which drives the wiping block 622 to retract. After the wiping cylinder 621 has retracted, the rear camera 624 takes a picture of the finished compound fertilizer granules on the sampling baffle 54 and transmits the picture to the central processing module 71 for the same processing as the picture taken by the front recognition camera 612. Step 8: After completing the same processing as the image captured by the front recognition camera 612, if it is found that the proportion of compound fertilizer particles larger than the standard particle size exceeds the specified proportion after the compound fertilizer discharged from the rotary drum granulator 1 passes through the drying device 4, then the opening of the electric regulating valve 84 in the humidity regulating component 8 is reduced again by the adjustment control module 74, thereby reducing the size of the compound fertilizer particles to be dried at the discharge end of the rotary drum granulator 1; if it is found that the proportion of compound fertilizer particles smaller than the standard particle size exceeds the specified proportion after the compound fertilizer discharged from the rotary drum granulator 1 passes through the drying device 4, then the opening of the electric regulating valve 84 in the humidity regulating component 8 is increased again by the adjustment control module 74, thereby increasing the size of the compound fertilizer particles to be dried at the discharge end of the rotary drum granulator 1, thus ensuring that the size of the finished compound fertilizer particles meets the standard.

[0034] See appendix Figure 8 and 14As shown, in this invention, after a period of time, dust generated during the production process will adhere to the currently used transparent plate 632, causing the transparent plate 632 to become blurry and the front recognition camera 612 to capture unclear images, resulting in errors in the results. Therefore, after the transparent plate 632 has been used for a period of time, the central processing module 71 will adjust the control module 74 to push out the transparent plate 632, which is not covered by dust and is located in the cleaning chamber 633, through the telescopic cylinder 631 connected to it, to cover the dust. After the transparent plate 632 is in place, the transparent plate 632 that is currently covered by dust will be driven into the cleaning chamber 633 for cleaning through the telescopic cylinder 631 connected to it. See appendix Figure 1 and 14 As shown, in this invention, the adjustment range of the opening of the electric regulating valve 84 based on the image captured by the rear camera 624 is smaller than the adjustment range of the opening of the electric regulating valve 84 based on the image captured by the front recognition camera 612. The time interval for the front recognition camera 612 to capture the image is the time from when the compound fertilizer raw material enters the rotary drum 13 to when the compound fertilizer granules fall onto the obstruction inclined plate 21. The time interval for the rear camera 624 to capture the image is the time from when the compound fertilizer granules leave the rotary drum granulator 1 to when they reach the storage bin 5, that is, the time taken for the compound fertilizer granules to be transported to the storage bin 5 after the front recognition camera 612 has captured the image.

[0035] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A fertilizer particle size monitoring system based on image recognition technology, comprising a rotary drum granulator (1), a discharge monitoring chamber (2) installed at the discharge end of the rotary drum granulator (1), a feeding conveyor (3) located at the discharge point of the discharge monitoring chamber (2), a drying device (4) located at the end of the feeding conveyor (3), and a discharge conveyor (9) located at the discharge end of the drying device (4); characterized in that, The end of the discharge conveyor (9) is provided with a storage bin (5); both the storage bin (5) and the discharge monitoring bin (2) are provided with a monitoring component (6) for monitoring the size of fertilizer granules; the discharge monitoring bin (2) is also equipped with a control center (7) connected to the monitoring component (6); the rotary drum granulator (1) is equipped with a humidity control component (8) connected to the control center (7). The control center (7) includes: The central processing module (71) is connected to the monitoring component (6) and is used for data analysis and instruction issuance of the images; The image processing unit (72) is connected to the central processing module (71) and is used to process the photos taken by the monitoring component (6); The storage unit (73), connected to the central processing module (71), is used to store photographs of standard fertilizer particle sizes; The adjustment control module (74) is connected to the humidity adjustment component (8), and adjusts the humidity adjustment component (8) according to the instructions of the central processing module (71), and cleans and wipes the monitoring component (6); The monitoring component (6) includes a front monitoring component (61) and a rear monitoring component (62). Among them, the front monitoring component (61) is installed on the discharge monitoring chamber (2), which includes a protective shell (611), a front recognition camera (612) and several sets of front dustproof structures (63). The rear monitoring component (62) is installed on the storage bin (5) for monitoring the finished compound fertilizer; The front dustproof structure (63) includes a telescopic cylinder (631) and a transparent plate (632). in, Telescopic cylinder (631), installed on top of protective shell (611), is connected to adjustment control module (74) and used to control the movement of transparent plate (632); A transparent plate (632) is installed on the telescopic rod of the telescopic cylinder (631) and is controlled by the telescopic cylinder (631) to block dust. The storage bin (5) includes: storage bin body (51), feeding frame (52), regulating bin (53), sampling baffle (54), sampling cylinder (55), sampling tube (56) and switching valve (57); The feeding frame (52) is installed inside the storage silo (51) and forms an angle of 1° to 10° with the top surface of the storage silo (51). The feeding trough (521) is provided at the end away from the top surface of the storage silo (51), and the sampling trough (522) is provided at the end close to the top surface of the storage silo (51). The sampling baffle (54) is movably installed in the regulating chamber (53) and forms an angle of 11°~20° with the feed frame (52); The sampling cylinder (55) is installed on the other side of the storage silo (51) and connected to the sampling baffle (54); The humidity control assembly (8) includes a moving ring (81), a steam pipe (82), a water pipe (83), and an electric regulating valve (84). The steam pipe (82) and water pipe (83) are both installed on the movable ring (81) and are both equipped with an electric regulating valve (84) connected to the regulating control module (74). The control center (7) is configured to perform image processing and analysis on the photos taken by the front monitoring component (61) on the discharge monitoring bin (2), and then perform a first adjustment control on the opening of the electric regulating valve (84); and to perform image processing and analysis on the photos taken by the rear monitoring component (62) on the storage bin (5), and then perform a second adjustment on the opening of the electric regulating valve (84), wherein the adjustment range of the second adjustment is smaller than the adjustment range of the first adjustment control.

2. The fertilizer particle size monitoring system based on image recognition technology according to claim 1, characterized in that, The rotary drum granulator (1) includes a rotary drum base frame (11), a rotary drum support (12), a rotary drum drum (13), a rotary drum driven gear (14), a rotary drum motor (15), and a rotary drum drive gear (16). The driven gear (14) of the drum is mounted on the drum roller (13); The drum drive gear (16) is mounted on the drum motor (15) and meshes with the drum driven gear (14); The drum support component (12) includes a drum support frame (121) and a drum support wheel (122) movably mounted on the drum support frame (121). The drum roller (13) is movably mounted on the drum base frame (11) and connected to the drum motor (15) via gears. The humidity control assembly (8) is mounted on the drum roller (13). The drum motor (15) is installed on the top of the drum base frame (11) and is connected to the drum drum (13) through gears to control the rotation of the drum drum (13).

3. The fertilizer particle size monitoring system based on image recognition technology according to claim 2, characterized in that, The movable ring (81) is movably installed on the drum roller (13), and the drum roller (13) is provided with several blind holes (131) that communicate with the inner cavity of the drum roller (13).

4. The fertilizer particle size monitoring system based on image recognition technology according to claim 3, characterized in that, The drum roller (13) is provided with a ventilation groove (132) that communicates with the blind hole (131). A limit ring (133) is installed on the groove wall of the ventilation groove (132), and a turntable bearing (134) is installed on the limit ring (133). The movable ring (81) is installed on the turntable bearing (134). The drum roller (13) is provided with a drum guide ring (135) corresponding to the drum support wheel (122).

5. The fertilizer particle size monitoring system based on image recognition technology according to claim 1, characterized in that, The drying device (4) includes a drying base frame (41), a drying rotary body (44), a drying motor (46), and a target hammer (48). The drying rotary body (44) is movably mounted on the drying base frame (41) and connected to the drying motor (46) via gears for drying compound fertilizer; The drying motor (46) is installed on the drying base frame (41) and connected to the drying rotary body (44) through gears to control the rotation of the drying rotary body (44); The hammers (48) are installed at equal intervals on the drying rotary body (44) to strike the drying rotary body (44) and prevent the compound fertilizer from adhering to the inner wall of the drying rotary body (44).

6. The fertilizer particle size monitoring system based on image recognition technology according to claim 5, characterized in that, The target hammer (48) includes a target straight tube (481), a target curved tube (482), a buffer tube (483), a target ball (484), and a buffer spring (485). The target tube (481) is installed at equal intervals on the drying rotary body (44) at one end; The target bend (482) is installed at one end on the other end of the target straight tube (481), and the angle between it and the target straight tube (481) is greater than 100° and less than 160°. The buffer tube (483) is installed on the other end of the target-shooting bend tube (482); The target ball (484) is installed in the target straight tube (481), the target curved tube (482) and the buffer tube (483), and can roll in the target straight tube (481), the target curved tube (482) and the buffer tube (483) to hit the drying rotary body (44); A buffer spring (485) is installed inside a buffer tube (483) to buffer the target ball (484), and the diameter of the buffer spring (485) is smaller than the diameter of the target ball (484).

7. The fertilizer particle size monitoring system based on image recognition technology according to claim 1, characterized in that, The protective shell (611) is installed on the side wall of the discharge monitoring chamber (2) and is provided with a guide groove (6111) for protecting the front recognition camera (612); The front recognition camera (612) is installed inside the protective shell (611) and connected to the central processing module (71); The front dustproof structure (63) is installed on the protective shell (611) and connected to the adjustment control module (74) to perform dustproof treatment on the front recognition camera (612).

8. The fertilizer particle size monitoring system based on image recognition technology according to claim 7, characterized in that, The front dustproof structure (63) also includes a cleaning chamber (633) and a cleaning sponge (634). The cleaning chamber (633) is installed at the bottom of the protective shell (611) and is connected to the inside of the protective shell (611) for cleaning the transparent plate (632); the cleaning chamber (633) is provided with a water exchange port (635). A cleaning sponge (634) is installed on top of the cleaning chamber (633) to wipe the cleaned transparent panel (632); The discharge monitoring chamber (2) is equipped with several staggered obstruction ramps (21) at equal intervals.

9. The fertilizer particle size monitoring system based on image recognition technology according to claim 1, characterized in that, The regulating chamber (53) is installed on the side of the storage chamber (51) and is connected to the feeding frame (52); The sampling tube (56) is installed on the storage silo (51) and is connected to the sampling slot (522); The switching valve (57) is installed on the sampling tube (56) and is used to control the opening and closing of the sampling tube (56); The rear monitoring component (62) is mounted on the feed frame (52).

10. The fertilizer particle size monitoring system based on image recognition technology according to claim 9, characterized in that, The rear monitoring component (62) includes a wiping cylinder (621), a wiping block (622), a mounting shell (623), a rear camera (624), and a dustproof transparent plate (625). Wiping cylinder (621) is installed on feed frame (52); Wiping block (622) is installed on wiping cylinder (621), corresponding to dustproof transparent plate (625), and controlled by wiping cylinder (621); Mounting housing (623) is installed on the feed frame (52) and located between the bottom surface of the feed frame (52) and the wiping cylinder (621); A rear camera (624) is installed inside the mounting housing (623) for photographing the finished compound fertilizer granules; A dustproof transparent plate (625) is installed on the feed frame (52) to cover the mounting shell (623) and prevent dust from entering.

Images