Cylinder screen aperture wear monitoring and self-adaptive adjusting device for seed cleaning machine

Abstract

The invention discloses a drum screen aperture wear monitoring and self-adaptive adjusting device for a seed cleaning machine, and relates to the field of seed cleaning. The drum screen aperture wear monitoring and self-adaptive adjusting device for the seed cleaning machine comprises a base and further comprises a rotating shaft rotationally connected to the base, a screen drum is fixedly connected to the rotating shaft, the feeding end of the screen drum is detachably connected with a cover plate through a fixing bolt, and multiple sets of screening holes are formed in the screen drum at equal intervals; by means of the annular air bag, the hole diameter of screening holes can be accurately and flexibly adjusted, compared with a traditional mode, the precision is higher, and the seed cleaning quality is guaranteed; the air bag inflation control unit is rapidly inflated and deflated, the aperture adjustment response speed is increased, the dynamic adjustment requirement is met, and the production efficiency is improved; all the modules work cooperatively, efficient and stable operation of seed cleaning operation is achieved through monitoring, analysis, adjustment and early warning, the automation level is improved, and the labor cost and the labor intensity are reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of seed cleaning, and particularly relates to a cylinder screen aperture abrasion monitoring and self-adaptive adjusting device for seed cleaning machinery. BACKGROUND

[0002] In seed cleaning production, the cylinder screen is a core screening equipment, and the precision of the screen aperture directly determines the seed cleaning quality. However, the screen aperture inevitably produces abrasion due to high-frequency friction of seeds and impurities in the long-term use process, resulting in changes in the aperture and seriously affecting the cleaning effect. At present, the traditional screen aperture adjusting mode mainly adopts mechanical structures such as wedge adjusting and gasket compensation. However, this adjusting mode has the following defects in actual use. On the one hand, the adjusting precision depends on manual experience, and it is difficult to realize precise control, which cannot meet the high-precision seed cleaning demand and is easy to cause impurities to mix or qualified seeds to be lost. On the other hand, the mechanical adjusting process is complicated and slow in response, and cannot quickly adapt to the dynamic changes of screen aperture abrasion, resulting in low cleaning efficiency and being difficult to meet the continuous and efficient operation requirements of the seed cleaning production line. Meanwhile, the existing seed cleaning device still has the following deficiencies in the degree of automation. The function modules are relatively independent, lack effective coordination mechanisms, and cannot realize real-time monitoring, intelligent analysis and automatic adjustment of screen aperture abrasion. Most of the links still need manual participation, such as manual inspection of screen aperture abrasion, manual operation of adjusting equipment, etc. This not only increases the labor cost and labor intensity, but also easily causes problems such as untimely monitoring and inaccurate adjustment due to human factors. Therefore, the application is proposed. SUMMARY

[0003] The technical problem to be solved by the application is to overcome the deficiencies of the prior art and provide a cylinder screen aperture abrasion monitoring and self-adaptive adjusting device for seed cleaning machinery, which can overcome the above problems or at least partially solve the above problems.

[0004] To solve the above technical problems, the basic idea of the technical solution of the application is as follows: The seed cleaning machinery is characterized in that the device comprises a base, a rotating shaft rotatably connected to the base, a screen cylinder fixedly connected to the rotating shaft, a plurality of screen holes equidistantly arranged on the screen cylinder, a motor fixedly installed on the base, a gear fixedly connected to the output end of the motor and the rotating shaft, a sensing module, an analysis and decision module, an execution adjustment module and an interactive early warning module.

[0005] Preferably, the sensing module comprises a sensor array composed of a plurality of laser displacement sensors which are axially spaced 8 cm and circumferentially spaced 25 degrees along the outer wall of the screen cylinder, each laser displacement sensor is equipped with a focusing lens, the measurement accuracy is ±0.01 mm, the measurement frequency is 100 Hz, and a data acquisition submodule for data acquisition and preliminary processing, an arc-shaped plate is fixedly connected to the base, and the laser displacement sensors are fixedly installed on the arc-shaped plate.

[0006] Further, the data acquisition submodule of the sensing module adopts a multi-channel synchronous acquisition technology, has a plurality of independent acquisition channels, is connected to the sensors through a 10Gbps optical fiber, and comprises a signal conditioning circuit and a data preprocessing unit, the signal conditioning circuit comprises an instrument amplifier and a fourth-order Butterworth low-pass filter, and the data preprocessing unit adopts Kalman filtering and Canny edge detection algorithm.

[0007] Preferably, the analysis and decision module is a high-performance industrial computer with built-in machine learning algorithm wear prediction model and hierarchical adjustment strategy, the hierarchical adjustment strategy is that when the wear amount is 0.1-0.3 mm, the adjustment is 0.05 mm each time, and when the wear amount is 0.3-0.5 mm, the adjustment is 0.1 mm each time.

[0008] Further, the analysis and decision module has the functions of man-machine interaction interface, data processing and analysis, wear trend prediction, adjustment instruction sending, running log recording and wear analysis report generation.

[0009] In order to adjust the size of the screen hole by expansion or contraction of the ring-shaped air bag, preferably, the execution adjustment module comprises a ring-shaped air bag arranged in the screen hole and an air bag inflation control unit, the ring-shaped air bag is embedded in the edge of the screen hole, and the air bag inflation control unit receives the instruction of the analysis and decision module to inflate or deflate to expand or contract to adjust the size of the screen hole.

[0010] In order to prevent the seed from being damaged by friction with the ring-shaped air bag during screening, further, the ring-shaped air bag is made of high-strength and high-elasticity silica gel material, the inner surface is smooth, and the outer surface is provided with anti-skid texture to prevent the seed from being damaged by friction with the ring-shaped air bag during screening.

[0011] In order to be able to control the inflation degree of the ring-shaped air bag accurately, further, the air bag inflation control unit comprises a micro air pump, an electromagnetic valve and a pressure sensor, the micro air pump is fixedly installed on the base, a hollow cavity is formed between the inner and outer walls of the screen cylinder, a gas conveying pipe is arranged on the ring-shaped air bag and communicates with the hollow cavity, an exhaust pipe is arranged on the outer wall of the screen cylinder and communicates with the gas conveying pipe, the electromagnetic valve is arranged on the exhaust pipe and is used for controlling the on-off of the gas, the pressure sensor is installed in the hollow cavity, a detection end of the pressure sensor is located in the ring-shaped air bag and is used for monitoring the pressure in the ring-shaped air bag in real time and feeding back a pressure signal to an analysis and decision module, the analysis and decision module adjusts the micro air pump and the electromagnetic valve through a PID control algorithm to realize accurate control of the inflation degree of the ring-shaped air bag, a gas conveying cavity that communicates with the hollow cavity is formed in the rotating shaft, a conduit that fixedly communicates with an output end of the micro air pump is provided, one end of the conduit that is away from the micro air pump communicates with the gas conveying cavity through a rotary joint, and the rotary joint is arranged on the rotating shaft.

[0012] In order to be able to send an alarm signal when the screen hole wear exceeds a serious threshold, preferably, the interactive early warning module comprises an audible and visual alarm and a touch display screen, the audible and visual alarm sends an alarm signal when the screen hole wear exceeds the serious threshold, and the touch display screen is used for displaying the screen hole wear state, adjustment record and system parameter setting in real time.

[0013] Further, the sensing module, the analysis and decision module, the execution adjustment module and the interactive early warning module transmit data and interact instructions through Ethernet or industrial field bus.

[0014] After the above technical scheme is adopted, the present application has the following beneficial effects compared with the prior art: The present application can make the screen hole diameter adjustment more accurate and flexible through the ring-shaped air bag, can quickly respond to the screen hole wear change, has higher adjustment accuracy compared with the traditional mechanical adjustment mode, and effectively guarantees the seed cleaning quality. The air bag inflation control unit can realize rapid inflation and deflation, greatly improves the screen hole diameter adjustment response speed, meets the demand for dynamic adjustment of the screen hole in the seed cleaning process, and improves the production efficiency. The ring-shaped air bag is made of high-strength and high-elasticity silica gel material, has good wear resistance and stability, is tightly combined with the screen hole, is not easy to be damaged, prolongs the service life of the execution adjustment module, and reduces the maintenance cost. In the seed cleaning operation process, the modules of the device work cooperatively, through continuous monitoring, analysis, adjustment and early warning, ensure that the seed cleaning operation is efficient and stable, improve the automation level and production efficiency of seed cleaning, and reduce the labor cost and labor intensity. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the screen cylinder and air bag inflation control unit of the present application; Figure 2 is a structural schematic diagram of the base and screen cylinder of the present application; Figure 3 is a structural schematic diagram of the module of the present application Figure 1 is an enlarged view of part A of the present application; Figure 4 is a structural schematic diagram of the arc plate and laser displacement sensor of the present application; Figure 5 is a structural schematic diagram of the module of the present application; Figure 6 is a system step flow chart of the present application.

[0016] In the figure: 1, base; 101, rotating shaft; 102, screen cylinder; 103, cover plate; 104, screening hole; 2, motor; 201, gear; 3, arc plate; 301, laser displacement sensor; 4, hollow cavity; 401, ring air bag; 402, gas conveying pipe; 403, electromagnetic valve; 404, pressure sensor; 405, micro air pump; 406, catheter; 407, exhaust pipe. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0018] Embodiment: refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6A wear monitoring and adaptive adjustment device for the aperture of a cylindrical sieve used in seed cleaning machinery includes a base 1 and a rotating shaft 101 rotatably connected to the base 1. A sieve cylinder 102 is fixedly connected to the rotating shaft 101. A cover plate 103 is detachably connected to the feed end of the sieve cylinder 102 via fixing bolts. Multiple sets of screening holes 104 are equidistantly opened on the sieve cylinder 102. A motor 2 is fixedly installed on the base 1. Gears 201 that mesh with each other are fixedly connected to the output end of the motor 2 and the rotating shaft 101. The device also includes a sensing module, an analysis and decision module, an execution and adjustment module, and an interactive early warning module. The sensing module is used to collect wear information of the screening holes 104. The analysis and decision module is used to analyze and process the wear information and make adjustment decisions. The execution and adjustment module is used to adjust the aperture of the screening holes 104 according to the decision instructions. The interactive early warning module is used to realize human-machine interaction and abnormal early warning.

[0019] The sensing module includes a sensor array consisting of multiple laser displacement sensors 301 arranged axially at 8 cm intervals and circumferentially at 25 degrees intervals along the outer wall of the screen cylinder 102. Each laser displacement sensor 301 is equipped with a focusing lens, with a measurement accuracy of ±0.01 mm and a measurement frequency of 100 Hz. It also includes a data acquisition submodule for data acquisition and preliminary processing. An arc plate 3 is fixedly connected to the base 1, and the laser displacement sensors 301 are fixedly mounted on the arc plate 3.

[0020] The data acquisition submodule of the sensing module adopts multi-channel synchronous acquisition technology, has multiple independent acquisition channels, is connected to the sensor through a 10Gbps optical fiber, and includes a signal conditioning circuit and a data preprocessing unit. The signal conditioning circuit includes an instrumentation amplifier and a fourth-order Butterworth low-pass filter, and the data preprocessing unit uses Kalman filtering and the Canny edge detection algorithm.

[0021] The analysis and decision-making module is a high-performance industrial computer with a built-in machine learning algorithm for wear prediction and a graded adjustment strategy. The graded adjustment strategy is to adjust by 0.05 mm each time when the wear is between 0.1 and 0.3 mm, and by 0.1 mm each time when the wear is between 0.3 and 0.5 mm.

[0022] The analysis and decision-making module has functions such as human-computer interaction interface, data processing and analysis, wear trend prediction, adjustment command sending, operation log recording and wear analysis report generation.

[0023] The adjustment module includes an annular airbag 401 and an airbag inflation control unit disposed within the sieve hole 104. The annular airbag 401 is embedded in the edge of the sieve hole 104. It receives instructions from the analysis and decision module through the airbag inflation control unit to inflate or deflate the airbag to adjust the size of the sieve hole 104 by expanding or contracting.

[0024] The ring-shaped air bag 401 is made of high-strength and high-elasticity silica gel material, the inner surface is smooth, and the outer surface is provided with anti-skid texture to prevent the seeds from being damaged by rubbing with the ring-shaped air bag 401 during the screening process.

[0025] The air bag inflation control unit includes a micro air pump 405, an electromagnetic valve 403 and a pressure sensor 404. The micro air pump 405 is fixedly installed on the base 1. A hollow cavity 4 is formed between the inner and outer walls of the sieve cylinder 102. A gas conveying pipe 402 is arranged on the ring-shaped air bag 401 and communicates with the hollow cavity 4. An exhaust pipe 407 is arranged on the outer wall of the sieve cylinder 102 and communicates with the gas conveying pipe 402. The electromagnetic valve 403 is arranged on the exhaust pipe 407 and is used to control the on-off of the gas. The pressure sensor 404 is installed in the hollow cavity 4, and the detection end of the pressure sensor 404 is located in the ring-shaped air bag 401. The pressure sensor 404 is used to monitor the pressure in the ring-shaped air bag 401 in real time and feed back the pressure signal to the analysis and decision module. The analysis and decision module adjusts the micro air pump 405 and the electromagnetic valve 403 through the PID control algorithm to realize the accurate control of the expansion degree of the ring-shaped air bag 401. A gas conveying cavity that communicates with the hollow cavity 4 is formed in the rotating shaft 101. The output end of the micro air pump 405 is fixedly connected with a conduit 406. The end of the conduit 406 away from the micro air pump 405 is connected with the gas conveying cavity through a rotary joint. The rotary joint is arranged on the rotating shaft 101.

[0026] The interactive early warning module includes an audible and visual alarm and a touch display screen. The audible and visual alarm sends an alarm signal when the wear of the screening hole 104 exceeds the serious threshold. The touch display screen is used to display the wear state of the screening hole 104, the adjustment record and the system parameter setting in real time.

[0027] The perception module, the analysis and decision module, the execution adjustment module and the interactive early warning module transmit data and interact instructions through Ethernet or industrial field bus.

[0028] When the seed cleaning machine is started, the motor 2 drives the rotating shaft 101 and the screen cylinder 102 to rotate through the gear 201. At this time, the laser displacement sensor 301 array of the sensing module starts to work. Each laser displacement sensor 301 focuses the laser beam through the focusing lens to the edge of the screening hole 104, monitors the position of the edge of the screening hole 104 in real time, and has a measurement accuracy of ±0.01 millimeter, which can accurately capture the subtle wear changes of the screening hole 104. At the same time, the laser displacement sensor 301 transmits the monitored analog signal to the data acquisition submodule. The data acquisition submodule uses multi-channel synchronous acquisition technology to receive sensor data through 10Gbps optical fiber quickly and stably. At this time, the data in the acquisition submodule first passes through the signal conditioning circuit, in which the instrument amplifier amplifies the signal and the fourth-order Butterworth low-pass filter removes high-frequency noise interference. Then it passes through the data preprocessing unit, uses Kalman filtering algorithm to eliminate random noise, accurately identifies the edge position of the screening hole 104 through Canny edge detection algorithm, calculates the actual size of the screening hole 104 aperture, and finally transmits the processed data to the analysis decision module. Compared with the traditional monitoring method, the laser displacement sensor 301 array and the data acquisition and processing technology can obtain the screen hole wear data more quickly and accurately, have higher monitoring accuracy, and provide reliable and timely data support for subsequent adjustment decisions, effectively avoid the problem of seed cleaning quality decline caused by untimely monitoring, and ensure the stability and continuity of the seed cleaning process.

[0029] After the analysis decision module receives the screening hole 104 aperture wear data transmitted by the sensing module, the machine learning algorithm wear prediction model built in the high-performance industrial computer starts to work. This model combines historical wear data and the current seed cleaning working state to predict the future wear trend of the screening hole 104. At the same time, the computer compares the calculated actual wear amount of the screening hole 104 with the preset wear threshold value. The preset mild wear threshold value is an aperture increase of 0.2 millimeter, and the severe wear threshold value is an aperture increase of 0.4 millimeter. If the wear amount does not exceed the light wear threshold, the analysis and decision module continues to maintain real-time monitoring, if it exceeds the light wear threshold but does not reach the severe wear threshold, the analysis and decision module starts the hierarchical adjustment strategy, and issues corresponding adjustment instructions according to different wear amounts, such as 0.05 mm each time when the wear amount is 0.1-0.3 mm, 0.1 mm each time when the wear amount is 0.3-0.5 mm, and if it exceeds the severe wear threshold, an early warning instruction is immediately issued to the interactive early warning module, and an adjustment instruction is issued to the execution adjustment module, wherein the wear prediction model based on the machine learning algorithm can predict the screen hole wear trend in advance, so that the device has foresight and can take preventive measures in advance, reducing equipment failure and production interruption caused by excessive wear of the screening hole 104, and the hierarchical adjustment strategy realizes fine control of the adjustment of the screening hole 104, and different adjustment amounts are adopted according to different wear degrees, which improves the accuracy and effectiveness of the adjustment compared with the traditional extensive adjustment, and ensures that the aperture of the screening hole 104 is always in a suitable working range, thereby improving the quality and efficiency of seed cleaning.

[0030] When the execution adjustment module receives the adjustment instruction of the analysis and decision module, it starts to adjust the aperture of the screening hole 104, the micro air pump 405 in the air bag inflation control unit starts to work, and the gas enters the ring-shaped air bag 401 through the conduit 406, the gas conveying cavity, the hollow cavity 4 and the gas conveying pipe 402, so that the ring-shaped air bag 401 is inflated. The ring-shaped air bag 401 is made of high-strength and high-elasticity silica gel material, and the inner surface is smooth and the outer surface is provided with anti-slip texture. In the inflation process, it can tightly fit the edge of the screen hole and prevent the seed from being damaged by friction with the air bag during screening; At this time, the pressure sensor 404 monitors the pressure in the ring-shaped air bag 401 in real time and feeds back the pressure signal to the analysis and decision module. The analysis and decision module adjusts the micro air pump 405 and the electromagnetic valve 403 through the PID control algorithm. When the pressure is insufficient, the inflation amount of the micro air pump 405 is increased, and when the pressure is too high, the electromagnetic valve 403 is controlled to open and deflate through the exhaust pipe 407, so as to accurately control the inflation degree of the ring-shaped air bag 401, and then realize the adjustment of the aperture of the screening hole 104 with an accuracy of ±0.02 mm. After the adjustment is completed, the sensing module monitors the aperture of the screening hole 104 again. If it does not reach the standard range, the analysis and decision module continues to issue adjustment instructions until the aperture of the screening hole 104 returns to the appropriate size. Through the combination of the ring-shaped air bag 401 and the PID control algorithm, compared with the traditional mechanical adjustment method, the adjustment process is more flexible and fast. At the same time, the material properties and structural design of the ring-shaped air bag 401 effectively avoid damage to the seeds and ensure the quality of the seeds. The high-precision adjustment ensures the accuracy of the aperture of the screening hole 104, further improves the quality of seed cleaning, and makes the cleaned seeds more in line with the standard, reducing the output of unqualified products.

[0031] When the wear of the screening hole 104 exceeds the severe wear threshold value, the analysis decision module issues a warning instruction to the interactive warning module, and the audible and visual alarm immediately issues an obvious audible and visual signal to remind the operator to check and handle. The operator can view the wear state, historical adjustment record and other detailed information of the screening hole 104 in real time through the touch display screen, and can also set and modify various parameters of the system, such as the aperture standard value of the screening hole 104, the wear threshold value, the sensor calibration parameter and the like on the touch display screen, so as to realize convenient management and control of the entire device. Therefore, the human-computer interaction performance of the device is improved, the operator can timely understand the running state of the device and quickly respond in the case of abnormality, the risk of equipment failure and production loss are effectively reduced, and the parameter setting and modification function of the touch display screen facilitates the operator to flexibly adjust the working parameters of the device according to different seed cleaning requirements, enhances the adaptability and universality of the device, and makes the device be able to meet diversified production scenes.

[0032] In summary, in the seed cleaning operation process, the modules of the device work cooperatively, and through continuous monitoring, analysis, adjustment and warning, the seed cleaning operation is ensured to be efficient and stable, the automation level and production efficiency of seed cleaning are improved, and the labor cost and labor intensity are reduced.

[0033] The above merely describes the preferred embodiments of the present application, but does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiments, it is not intended to limit the present application.

Claims

1. A device for monitoring and self-adapting the aperture size of a cylinder sieve used in a seed cleaning machine, comprising a base (1), characterized in that, Also include: The rotating shaft (101) is rotatably connected to the base (1), wherein the rotating shaft (101) is fixedly connected with a screen cylinder (102), the feed end of the screen cylinder (102) is detachably connected with a cover plate (103) through a fixing bolt, a plurality of groups of screening holes (104) are equally arranged on the screen cylinder (102), and a motor (2) is fixedly installed on the base (1). The output end of the motor (2) and the rotating shaft (101) are both fixedly connected with gear wheels (201) that are connected with each other, Wherein, it further includes a sensing module, an analysis and decision module, an execution adjustment module and an interactive early warning module, the sensing module is used for collecting the wear information of the screening hole (104), the analysis and decision module is used for analyzing and processing the wear information and making adjustment decisions, the execution adjustment module is used for adjusting the aperture of the screening hole (104) according to the decision instruction, and the interactive early warning module is used for realizing man-machine interaction and abnormal early warning.

2. The cylinder sieve aperture wear monitoring and self-adaptive adjusting device for seed cleaning machinery according to claim 1, characterized in that, The sensing module includes a sensor array composed of a plurality of laser displacement sensors (301) which are distributed at an axial interval of 8 cm and a circumferential interval of 25 degrees along the outer wall of the screen cylinder (102), each laser displacement sensor (301) is equipped with a focusing lens, the measurement accuracy is ±0.01 mm, the measurement frequency is 100 Hz, and a data acquisition submodule for data acquisition and preliminary processing is arranged, and the base (1) is fixedly connected with an arc-shaped plate (3), and the laser displacement sensor (301) is fixedly installed on the arc-shaped plate (3).

3. The cylinder screen aperture wear monitoring and self-adaptive adjusting device for seed cleaning machinery according to claim 2, characterized in that, The data acquisition submodule of the sensing module adopts a multi-channel synchronous acquisition technology, has a plurality of independent acquisition channels, is connected with the sensor through a 10Gbps optical fiber, and includes a signal conditioning circuit and a data preprocessing unit, the signal conditioning circuit includes an instrument amplifier and a fourth-order Butterworth low-pass filter, and the data preprocessing unit adopts Kalman filtering and Canny edge detection algorithm.

4. The cylinder sieve aperture wear monitoring and self-adaptive adjusting device for seed cleaning machinery according to claim 1, characterized in that, The analysis and decision module is a high-performance industrial computer with built-in machine learning algorithm wear prediction model and hierarchical adjustment strategy, the hierarchical adjustment strategy is that when the wear amount is 0.1-0.3 mm, the aperture is adjusted by 0.05 mm each time, and when the wear amount is 0.3-0.5 mm, the aperture is adjusted by 0.1 mm each time.

5. The cylinder sieve aperture wear monitoring and self-adaptive adjusting device for seed cleaning machinery according to claim 4, characterized in that, The analysis and decision module has the functions of man-machine interaction interface, data processing and analysis, wear trend prediction, adjustment instruction sending, operation log recording and wear analysis report generation.

6. The cylinder screen aperture wear monitoring and self-adaptive adjusting device for seed cleaning machinery according to claim 1, characterized in that, The execution adjustment module includes a ring-shaped air bag (401) arranged in the screening hole (104) and an air bag inflation control unit, the ring-shaped air bag (401) is embedded in the edge of the screening hole (104), and the air bag inflation control unit receives the instruction of the analysis and decision module to inflate or deflate, so as to expand or shrink to adjust the aperture size of the screening hole (104).

7. The cylinder screen aperture wear monitoring and self-adaptive adjusting device for seed cleaning machinery according to claim 6, characterized in that, The ring-shaped air bag (401) is made of high-strength and high-elasticity silica gel material, the inner surface is smooth, and the outer surface is provided with anti-skid texture to prevent the seeds from being damaged by friction with the ring-shaped air bag (401) during screening.

8. The cylinder screen aperture wear monitoring and self-adaptive adjusting device for seed cleaning machinery according to claim 6, characterized in that, The air bag inflation control unit comprises a micro air pump (405), an electromagnetic valve (403) and a pressure sensor (404), the micro air pump (405) is fixedly installed on the base (1), a hollow cavity (4) is formed between the inner and outer walls of the sieve cylinder (102), the ring-shaped air bag (401) is provided with a gas conveying pipe (402) in communication with the hollow cavity (4), the outer wall of the sieve cylinder (102) is provided with an exhaust pipe (407) in communication with the gas conveying pipe (402), the electromagnetic valve (403) is arranged on the exhaust pipe (407), the electromagnetic valve (403) is used for controlling the on-off of the gas, the pressure sensor (404) is installed in the hollow cavity (4), the detection end of the pressure sensor (404) is located in the ring-shaped air bag (401), which is used for monitoring the pressure in the ring-shaped air bag (401) in real time and feeding back the pressure signal to an analysis and decision module, the analysis and decision module adjusts the micro air pump (405) and the electromagnetic valve (403) through a PID control algorithm, and the expansion degree of the ring-shaped air bag (401) is accurately controlled, a gas conveying cavity in communication with the hollow cavity (4) is formed in the rotating shaft (101), the output end of the micro air pump (405) is fixedly connected with a conduit (406), one end of the conduit (406) away from the micro air pump (405) is connected with the gas conveying cavity through a rotary joint, and the rotary joint is arranged on the rotating shaft (101).

9. The cylinder screen aperture wear monitoring and self-adaptive adjusting device for seed cleaning machinery according to claim 1, characterized in that, The interactive early warning module comprises an audible and visual alarm and a touch display screen, the audible and visual alarm sends an alarm signal when the wear of the screening hole (104) exceeds a serious threshold, and the touch display screen is used for displaying the wear state of the screening hole (104), adjustment records and system parameter settings in real time.

10. The cylinder screen aperture wear monitoring and self-adaptive adjusting device for seed cleaning machinery according to any one of claims 1-9, characterized in that, The sensing module, the analysis and decision module, the execution adjustment module and the interactive early warning module are connected through an Ethernet or an industrial field bus for data transmission and instruction interaction.

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