Anti-blocking structure of carding machine and control method of anti-blocking structure

Abstract

The invention relates to the field of textile machinery, in particular to an anti-blocking structure of a carding machine and a control method thereof.The anti-blocking structure comprises a collecting box, a detecting assembly, an air blowing assembly and an impurity discharging channel; the control method comprises the following steps: acquiring measurement values acquired by a plurality of infrared distance measuring sensors, and processing the measurement values to obtain filtering signals; a trigger condition is set, and if the filtering signal reaches the trigger condition, the air blowing assembly is controlled to switch the air volume mode; the infrared distance measuring sensor array is arranged in the collecting box, the accumulation condition of impurities can be monitored in real time, and whether the blocking risk exists or not is accurately judged; through intelligent air volume mode switching of the control terminal, the working state of the air blowing assembly can be automatically adjusted according to the detection signal, so that delay and resource waste of a traditional cleaning method are avoided, and the response speed and the energy utilization efficiency of the system are improved.

Description

Technical Field

[0001] The present invention relates to the field of textile machinery, and particularly to a clogging prevention structure of a carding machine and its control method. Background Art

[0002] A carding machine is a key device widely used in the textile industry. Its main function is to card fibers, straighten the fibers into a parallel and straight state, and at the same time remove impurities and short fibers in the fibers, so as to card the fiber raw materials into single fiber state and remove impurities, ensuring the smoothness of the textile process. However, due to the fact that the fiber raw materials often contain more impurities or fiber entanglement, the carding machine is prone to impurity accumulation or clogging during operation, which will not only affect the normal operation of the equipment, but also may interfere with the subsequent textile process flow and reduce the overall production efficiency.

[0003] Traditional anti-clogging technologies mainly rely on the optimization of mechanical structures. For example, increasing the size of the impurity channel or alleviating the clogging problem of the carding machine through physical separation, mechanical cleaning and other means. However, when dealing with high-intensity or continuous operation scenarios, these methods still have deficiencies such as incomplete cleaning and lagging response. In addition, for textile production lines with a high degree of equipment automation, the traditional manual intervention cleaning method has low efficiency and is not conducive to the high-efficiency production requirements of modern textile industry. Summary of the Invention

[0004] The technical problem to be solved by the present invention is the clogging caused by impurity accumulation or fiber entanglement during the operation of the carding machine. The purpose is to provide a clogging prevention structure of a carding machine and its control method, which realizes real-time monitoring through an infrared distance sensor and intelligent control of the air volume mode, quickly responds to the clogging situation and effectively removes impurities.

[0005] The present invention is realized by the following technical solutions:

[0006] A clogging prevention structure of a carding machine includes: a collection box, a detection component, a blowing component and a waste discharge channel. The collection box is arranged directly below the carding wheel of the carding machine. The detection component and the blowing component are both arranged in the collection box. A waste discharge window communicating with the waste discharge channel is arranged on the side surface of the collection box. The air outlet direction of the blowing component faces the waste discharge window;

[0007] Both the detection component and the blowing component are electrically connected to a control terminal.

[0008] Specifically, it is set that the waste discharge window is arranged on the first side surface of the collection box and is connected to the third side surface of the collection box. The second side surface of the collection box is oppositely arranged to the first side surface of the collection box. The third side surface of the collection box is oppositely arranged to the fourth side surface of the collection box;

[0009] The detection component is arranged on the fourth side of the collection box, and the blowing component is arranged on the second side and the fourth side of the collection box.

[0010] Specifically, the detection component includes a plurality of infrared ranging sensors, and the plurality of infrared ranging sensors are arranged in an array on the fourth side of the collection box;

[0011] The blowing component includes a plurality of nozzles and a positive pressure device. The plurality of nozzles are communicated with the air outlet of the positive pressure device through an air pipe. The plurality of nozzles are arranged in an array on the fourth side and the third side of the collection box, and the central axes of the plurality of nozzles all point to the center point of the impurity discharge window.

[0012] Furthermore, the blowing component further includes a plurality of enhanced nozzles, and the enhanced nozzles are arranged on the second side of the collection box and are arranged opposite to the impurity discharge window.

[0013] A control method for an anti-blocking structure of a carding machine, which runs in a control terminal of an anti-blocking structure of a carding machine as described above, the control method includes:

[0014] Obtain the measurement values collected by a plurality of infrared ranging sensors, and process the measurement values to obtain a filtered signal;

[0015] Set a trigger condition. If the filtered signal reaches the trigger condition, control the blowing component to switch the air volume mode.

[0016] Specifically, the method for obtaining the measurement values collected by a plurality of infrared ranging sensors includes:

[0017] Determine the emission intensity of the i-th infrared ranging sensor IR i at the k-th global sampling

[0018] Set the global sampling period as T cycle , and perform M rounds of sampling within a global sampling period. In the m-th round of sampling, activate some infrared ranging sensors to turn on infrared emission, and obtain the set Φ of the activated sensor indexes m , m = 1, 2,..., M, N is the number of infrared ranging sensors;

[0019] Perform R fast readings on all sensors in the activated state to obtain sensor readings wherein, i ∈ Φ m , r = 1, 2,..., R, t k = k·T cycle is the sampling moment;

[0020] Obtain the preliminary measurement value of the i-th activated infrared ranging sensor at the k-th global sampling and the m-th round of sampling

[0021] Obtain the original measurement value of the i-th activated infrared ranging sensor at the k-th global sampling Among them, is the set of rounds in which the i-th sensor is activated during the k-th global sampling period.

[0022] Optionally, determine the emission intensity The method includes:

[0023] Set the initial emission intensity i of the i-th infrared ranging sensor IR

[0024] Iterate based on the initial emission intensity until the original measurement value Z i (t k - 1) of the (k - 1)-th global sampling is obtained;

[0025] Set the upper limit X max of the original measurement value and the lower limit X min ;

[0026] If Z i (t k-1 ) ≤ X min , then let If Z i (t k-1 ) ≥ X max , then let If X min <Z i (t k-1 ) < X max , then let Among them, ΔI is the emission intensity adjustment amplitude.

[0027] Specifically, the method for processing the measurement value to obtain the filtered signal includes:

[0028] Obtain M preliminary measurement values of the i-th sensor at the k-th global sampling

[0029] Perform extreme value comparison on the M preliminary measurement values ; when a certain preliminary measurement value exceeds the preset upper and lower limit thresholds or is an outlier, it is determined as an abnormal value and eliminated to obtain a pure measurement value;

[0030] Perform average processing on the pure measurement values within a fixed-length sliding window in adjacent several sampling periods to obtain a short-term smoothed value;

[0031] The short-term smoothed value is weighted and fused with the long-term smoothed value at time t according to a preset smoothing coefficient to generate a new long-term smoothed value in a recursive form, and the new long-term smoothed value is used as the filtered signal. k-1 Specifically, the trigger conditions include a large air volume trigger condition and a small air volume trigger condition;

[0032] Judge the trigger conditions of each infrared ranging sensor independently. If the filtered signal of any one infrared ranging sensor reaches the large air volume trigger condition, control the blowing component to work in the large air volume mode; if the filtered signals of all infrared ranging sensors reach the small air volume trigger condition, control the blowing component to work in the small air volume mode.

[0033] Optionally, the method for controlling the switching of the air volume mode by the infrared ranging sensor includes:

[0034] Set a warning threshold T

[0035] and an overrun threshold T warn，i for each infrared ranging sensor, T crit，i > T crit，i > T warn，i ; set an entry threshold S in，i and an exit threshold S out,i , S out,i < S in,i ;

[0036] Let the initial integral score S i (t0) = 0, and it is default that the small air volume mode is started;

[0037] Obtain the filtered signal F i (t k ) at the k-th sampling period;

[0038] Calculate the instantaneous excess value H i (t k ) = max{0, F i (t k ) - T warn，i}; calculate the overrun factor

[0039] Calculate the integral score S i (t k ) = α i · S i (t k-1 ) + β i · H i (t k ) + γ i · δ i (t k ), where α i ∈(0, 1) is a given attenuation coefficient, βi and γ i are weight coefficients;

[0040] Iteratively calculate the integral score S i (t k+1 ) at the (k + 1)-th sampling period;

[0041] If the integral scores for n consecutive sampling periods are all greater than S in，i , switch to the high air volume mode;

[0042] If the integral scores for n consecutive sampling periods are all less than S out，i , switch to the low air volume mode.

[0043] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0044] The anti-clogging structure proposed by the present invention includes a collection box, a detection component, a blowing component, and a waste discharge channel. The detection component uses multiple infrared ranging sensors to monitor the accumulation of impurities in the collection box in real time, and the control terminal controls the switching of the air volume mode of the blowing component according to the signals collected by the detection component, thereby realizing dynamic impurity cleaning.

[0045] By arranging an infrared ranging sensor array in the collection box, the present invention can monitor the accumulation of impurities in real time and accurately judge whether there is a clogging risk; through the intelligent air volume mode switching of the control terminal, the working state of the blowing component can be automatically adjusted according to the detection signals, thereby avoiding the delay and resource waste of traditional cleaning methods and improving the response speed and energy utilization efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings illustrate exemplary embodiments of the present invention and are used in conjunction with the description thereof to explain the principles of the present invention. The drawings are included to provide a further understanding of the present invention, and the drawings are included in this specification and form a part of this specification, and do not constitute a limitation on the embodiments of the present invention.

[0047] Figure 1 is a front view of an anti-clogging structure of a carding machine according to the present invention.

[0048] Figure 2 is a top view of an anti-clogging structure of a carding machine according to the present invention.

[0049] Figure 3 is a schematic flowchart of a control method for an anti-clogging structure of a carding machine according to the present invention.

[0050] Figure 4 is a schematic flowchart of a method for switching modes of a single infrared ranging sensor according to the present invention.

[0051] Reference numerals: 1 - collection box, 2 - blowing component, 3 - detection component, 4 - impurity discharge channel. Detailed implementation manners

[0052] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and implementation manners. It can be understood that the specific implementation manners described herein are only used to explain the relevant content and do not limit the present invention.

[0053] In addition, it should be noted that for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings.

[0054] Without conflict, the implementation manners in the present invention and the features in the implementation manners can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and implementation manners.

[0055] Embodiment 1

[0056] As Figure 1 and Figure 2 shown, this embodiment provides an anti-blocking structure for a carding machine, including: a collection box 1, a detection component 3, a blowing component 2 and an impurity discharge channel 4. The collection box 1 is arranged directly below the carding wheel of the carding machine. Both the detection component 3 and the blowing component 2 are arranged in the collection box 1. A discharge window communicating with the impurity discharge channel 4 is arranged on the side of the collection box 1; the air outlet direction of the blowing component 2 faces the discharge window;

[0057] Both the detection component 3 and the blowing component 2 are electrically connected to the control terminal. The control terminal adjusts the operation mode of the blowing component 2 according to the monitoring data of the detection component 3 to achieve intelligent impurity cleaning.

[0058] The collection box 1 is arranged below the carding wheel and is used to centrally collect the impurities removed from the fiber raw materials. The size of the collection box can be designed according to the bottom space of the carding machine and the estimated amount of impurities in the production. The height should ensure that after installing the nozzle and the sensor, it will not overly occupy the vertical space. The bottom of the collection box can be appropriately made into an inclined surface or a flat surface, specifically depending on the accumulation method and discharge effect of the falling sundries. If it is necessary to reduce the accumulation of sundries at the corners, a moderate diversion plate design can be made inside the collection box. The material is often selected as metal (such as stainless steel or galvanized steel plate) because of its wear resistance and easy cleaning; surface treatment can also be done according to the anti-static requirements. An inspection opening / observation opening is left at the upper end or side of the collection box for convenient manual cleaning and maintenance during regular or emergency situations.

[0059] The detection component 3 is installed inside the collection box 1 to monitor the accumulation of impurities in the collection box 1 in real time. The blowing component 2 is also arranged in the collection box 1. Through the nozzle with the air outlet direction pointing to the discharge window, the impurities in the collection box 1 are removed by using air flow.

[0060] The detection component 3 continuously senses the accumulation of impurities in the collection box 1 and transmits signals to the control terminal. When the signal feedback from the detection component 3 indicates the risk of impurity accumulation or blockage, the control terminal activates the blowing component 2 to adjust the air flow of the nozzles to concentrate and blow towards the impurity discharge window, quickly discharging the impurities into the impurity discharge channel 4.

[0061] It is set that the impurity discharge window is on the first side of the collection box 1 and is adjacent to the third side of the collection box 1. The second side of the collection box 1 is oppositely arranged to the first side of the collection box 1, and the third side of the collection box 1 is oppositely arranged to the fourth side of the collection box 1, forming a closed space for facilitating the centralized treatment of impurities.

[0062] The detection component 3 is arranged on the fourth side of the collection box 1, and the blowing component 2 is arranged on the second side and the fourth side of the collection box 1.

[0063] The detection component 3 includes multiple infrared ranging sensors, which are arranged in an array on the fourth side of the collection box 1 for continuously monitoring the accumulation of impurities. The infrared ranging sensors measure the distance between the impurities and the fourth side by emitting and receiving infrared signals. When the accumulation of impurities increases, the distance to the fourth side shortens, and the sensors can capture this change in real time and send data to the control terminal. Using this method, the accumulation of impurities in the collection box 1 can be simply and effectively evaluated.

[0064] The blowing component 2 includes multiple nozzles and a positive pressure device. The multiple nozzles are connected to the air outlet of the positive pressure device through air pipes. The multiple nozzles are arranged in an array on the fourth side and the third side of the collection box 1, and the central axes of the multiple nozzles all point to the center point of the impurity discharge window.

[0065] The nozzles should be able to convey the cotton fluffs and impurities at any position in the collection frame towards the impurity discharge window / impurity discharge pipeline direction by air flow. While maintaining the blowing efficiency, efforts should be made to reduce air consumption and avoid the interference of secondary dust raising to other parts of the carding machine. If the collection frame is relatively long, the nozzles can be distributed in a staggered manner on the side wall or the rear wall, covering comprehensively on the one hand and avoiding mutual interference of the blowing on the other hand.

[0066] The forms of the nozzles include flat nozzles and small round nozzles. The flat nozzles (air knife type) can form a relatively wide air curtain, which is suitable for blowing up large areas of loose fibers; the concentrated impact force of the small round nozzles is greater, but the coverage area is relatively small, and more nozzles or reasonable arrangement are required. Specifically, the suitable nozzle shape can be selected according to the air supply pressure and flow rate.

[0067] The blowing component 2 in this embodiment includes two working modes, a large air volume mode and a small air volume mode. The small air volume mode is to maintain a relatively low pressure / flow rate (such as 1 - 2 bar or set according to requirements), and the large air volume mode is to generate a relatively large pressure (such as 4 - 6 bar or higher).

[0068] When the blowing component 2 operates in the small air volume mode, it slowly blows the impurities, causing them to gradually approach the impurity discharge window, so as to slowly move the broken cotton and impurities towards the impurity discharge pipeline direction, avoiding excessive accumulation in the center or corners of the collection area, and at the same time avoiding unnecessary strong air flow interference.

[0069] When the detection component 3 monitors that the accumulated amount of impurities reaches the threshold value, the control terminal switches the blowing component 2 to the large air volume mode, and the concentrated air flow quickly discharges the impurities to the third side and finally discharges them through the impurity discharge window, ensuring that the collection box 1 remains unobstructed.

[0070] The blowing component 2 further includes a plurality of enhanced nozzles, and the enhanced nozzles are arranged on the second side of the collection box 1 and are arranged opposite to the impurity discharge window. Since the enhanced nozzles are located on the side opposite to the impurity discharge window, the air flow direction thereof is exactly the same as the opening direction of the impurity discharge window, thereby providing a more direct and effective driving force. Therefore, additional air flow can be generated to further push the impurities that have been blown towards the impurity discharge window by other nozzles until they completely enter the impurity discharge pipeline, completing the cleaning of the impurities.

[0071] Embodiment 2

[0072] As Figure 3 shown, a control method for the anti-blocking structure of a carding machine is provided, which runs in the control terminal of the anti-blocking structure of a carding machine as described above. The purpose is to monitor the accumulation of impurities in real time through an infrared ranging sensor and intelligently switch the air volume mode of the blowing component based on the detection result to ensure the high efficiency of impurity cleaning and the reliability of equipment operation. The core logic is to judge the accumulation situation based on the sensor signal and dynamically adjust the working state of the blowing component. The control method includes:

[0073] Obtain the measurement values collected by multiple infrared ranging sensors and process the measurement values to obtain a filtered signal; the multiple infrared ranging sensors are distributed at key positions of the collection box, and collect the distance data between the impurities and the sensors in real time, providing the original measurement values reflecting the accumulation of impurities. The measurement values are processed through a filtering algorithm to eliminate noise or outliers caused by sensor errors or environmental factors, and a stable filtered signal is obtained.

[0074] Set the trigger conditions. If the filtered signal reaches the trigger conditions, control the blowing component to switch the air volume mode. The trigger conditions include the large air volume trigger condition and the small air volume trigger condition;

[0075] Small air volume trigger condition: When the filtered signal indicates that the accumulation of impurities is less, the system defaults to the small air volume mode, gently guiding the impurities to the impurity discharge window slowly. This mode reduces energy consumption and reduces the disturbance to the fiber raw materials.

[0076] High air volume trigger condition: When the filtered signal indicates that the impurity accumulation reaches a certain threshold (for example, the measurement value of the infrared ranging sensor shows that the impurity is very close to the sensor), the system switches to the high air volume mode, generating a strong air flow to quickly remove the impurities.

[0077] Independently judge the trigger conditions of each infrared ranging sensor. If the filtered signal of any one infrared ranging sensor reaches the high air volume trigger condition (that is, the impurity accumulation in a certain area is serious), then control the blowing component to work in the high air volume mode to give priority to cleaning the accumulation area; if the filtered signals of all infrared ranging sensors reach the low air volume trigger condition, then control the blowing component to work in the low air volume mode.

[0078] During daily operation, the system mainly operates in the low air volume mode to ensure the energy-saving and efficient operation of the equipment. When a blockage risk is detected, the high air volume mode quickly intervenes to strongly clean the impurities, ensuring that the collection box is unobstructed and avoiding more serious blockage problems.

[0079] Embodiment III

[0080] As Figure 4 shown, the method for obtaining the measurement values collected by multiple infrared ranging sensors includes:

[0081] Determine the emission intensity of the i-th infrared ranging sensor IR i at the k-th global sampling The emission intensity is the output power of the infrared signal. The initial emission intensity is usually set according to the default value, and may be dynamically adjusted subsequently according to specific measurement situations (such as ambient light interference, surface reflection characteristics of the measurement object, etc.) to ensure that the reflected signal can be received while avoiding interference caused by overly strong signals.

[0082] Set the global sampling period as T cycle , and perform M rounds of sampling within a global sampling period. In the m-th round of sampling, activate some of the infrared ranging sensors to turn on the infrared emission, and obtain the set Φ of the indices of the activated sensors m , m = 1, 2,..., M, N is the number of infrared ranging sensors; the global sampling period means that the system completes the sampling operations of all sensors within a fixed time. At the same time, in order to avoid interference caused by possible cross-coverage of the infrared signals of multiple sensors, randomly activate some sensors in each round of sampling. The batch activation strategy can not only reduce the simultaneous usage pressure of hardware resources but also improve the signal quality.

[0083] Perform R rapid readings on all activated sensors to obtain the sensor readings where, i ∈ Φ m , r = 1, 2,..., R, t k = k·T cycle is the sampling time;

[0084] Obtain the preliminary measurement value of the i-th activated infrared ranging sensor at the k-th global sampling and the m-th round of sampling By reading multiple times and taking the average, reduce the influence of single-read noise on the measurement result.

[0085] Obtain the original measurement value of the i-th activated infrared ranging sensor at the k-th global sampling Among them, is the set of rounds in which the i-th sensor is activated during the k-th global sampling period. By calculating the cross-round average, the random error is further reduced.

[0086] In addition, dynamically adjusting the emission intensity can optimize the signal intensity according to environmental conditions and measurement results, enabling the sensor to obtain accurate measurement data under various working conditions, while avoiding errors and interferences caused by too weak or too strong signals, and providing a method for dynamically adjusting the emission intensity including:

[0087] Set the initial emission intensity of the i-th infrared ranging sensor IR i The initial value is usually determined according to the hardware parameters of the sensor or typical conditions in the application environment. For example, a moderate intensity is selected according to parameters such as the distance measurement range and ambient light interference. Let k = 1 first, and then based on

[0088] sample and use the above method to solve Z (t1), and judge its magnitude relationship with the upper limit X i of the original measurement value and the lower limit X max of the original measurement value to obtain min

[0089] And so on, iterate based on the initial emission intensity until the original measurement value Z i (t k-1 ) of the (k - 1)-th global sampling is obtained;

[0090] Set the upper limit X max of the original measurement value and the lower limit X min of the original measurement value; The upper limit of the original measurement value represents the safety threshold of the sensor's original measurement value when the signal is too strong. Exceeding this value may indicate signal saturation or strong interference. The lower limit of the original measurement value represents the safety threshold when the signal is too weak. Falling below this value may lead to unreliable measurement results or signal loss.

[0091] If Z i (t k-1 ) ≤ X min ​, it indicates that the signal strength is insufficient, which may be due to the target being far away or strong environmental interference. At this time, it is necessary to increase the transmission intensity, so let

[0092] If Z i (t k-1 ) ≥ X max , it indicates that the signal strength is too high, which may cause saturation or reflection interference. At this time, it is necessary to reduce the transmission intensity, so let

[0093] If X min <Z i (t k-1 ) < X max , it indicates that the current signal strength is within a reasonable range and there is no need to adjust the transmission intensity, so let

[0094] ΔI is the adjustment amplitude of the transmission intensity, and usually a fixed value is set according to the hardware response ability.

[0095] When the signal is too weak or too strong, by adjusting the transmission intensity, the best intensity of the signal within the detection range is maintained, ensuring the measurement accuracy. The system can optimize the signal quality of the infrared sensor according to the real-time feedback data, guarantee the accuracy and stability of the measurement, and at the same time improve the adaptability and energy efficiency of the system.

[0096] Example 4

[0097] The method for processing the measured value to obtain the filtered signal includes:

[0098] Obtain M preliminary measured values of the i-th sensor in the k-th global sampling

[0099] For the M preliminary measured values Perform extreme value comparison; when a certain preliminary measured value exceeds the preset upper and lower threshold values or is an outlier, it is determined as an abnormal value and excluded to obtain the pure measured value; the upper and lower threshold values are the measurement ranges preset for each sensor by the system (such as the maximum and minimum values of a certain distance range). If a certain preliminary measured value exceeds the range, it is directly determined as an abnormal value. Outliers are judged by statistical methods such as standard deviation or mean deviation.

[0100] Perform average processing on the pure measured values within adjacent several sampling periods using a sliding window with a fixed length to obtain the short-term smoothed value Among them, W is the length of the sliding window, and Z i (t j ) is the pure measured value.

[0101] Compare the short-term smoothed value S short (t k ) with t k-1Long-term smoothed value S at a moment long (t k-1 ) is weighted and fused according to a preset smoothing coefficient to generate a new long-term smoothed value, S long (t k ) = αS long (t k-1 ) + (1 - α ) S short (t k ), where α is a smoothing coefficient used to control the dependence of the long-term smoothed value on historical data, and the new long-term smoothed value is used as the filtering signal.

[0102] Embodiment 5

[0103] In this embodiment, through an integral scoring mechanism and dynamic analysis of the filtering signal, automatic switching between air volume modes (small air volume and large air volume) is achieved. The method includes:

[0104] Set a warning threshold T warn,i and an overlimit threshold T crit,i for each infrared ranging sensor, T crit,i > T warn,i ; set an entry threshold S in,i and an exit threshold S out，i , S out，i < S in,i ;

[0105] The warning threshold indicates that the impurity accumulation detected by the sensor is approaching the warning state; the overlimit threshold indicates that the impurity accumulation has reached a serious level and needs to be quickly switched to the large air volume mode; the entry threshold is the lower limit of the integral score for the control system to switch to the large air volume mode; the exit threshold is the upper limit of the integral score for the control system to switch back to the small air volume mode.

[0106] Let the initial integral score S i (t0) = 0, and by default, the small air volume mode is started;

[0107] Obtain the filtering signal F i (t k ) at the k-th sampling period;

[0108] Calculate the instantaneous excess value H i (t k ) = max{0, F i (t k ) - T warn,i}; the instantaneous excess value is used to evaluate the degree to which the filtering signal exceeds the warning threshold, and F i (t k ) > T warn,i indicates that the impurity accumulation has reached the warning state and the excess value is greater than 0.

[0109] Calculate the overrun factor The overrun factor is used to determine whether the filtered signal reaches the overrun threshold. An overrun factor equal to 1 indicates that the current impurity accumulation is severe and the air volume needs to be increased rapidly.

[0110] Calculate the integral score S i (t k ) = α i ·S i (t k-1 ) + β i ·H i (t k ) + γ i ·δ i (t k ), where α i ∈(0, 1) is a given attenuation coefficient, and β i and γ i are weight coefficients;

[0111] Iteratively calculate the integral score S i (t k+1 ) for the (k + 1)-th sampling period;

[0112] If the integral scores for n consecutive sampling periods are all greater than S in，i , the system determines that the impurity accumulation is severe and switches to the high air volume mode;

[0113] If the integral scores for n consecutive sampling periods are all less than S out，i , the system determines that the impurity accumulation situation has eased and switches to the low air volume mode.

[0114] Through the dynamic tracking of the integral score, the system not only judges the current impurity accumulation situation but also captures its cumulative trend, avoiding misjudgment caused by instantaneous signal fluctuations. And setting the entry threshold and exit threshold avoids the system from frequently switching the air volume mode near the critical point, improving the running stability.

[0115] In the description of this specification, the description with reference to terms such as "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments / ways or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments / ways or examples described in this specification and the features of different embodiments / ways or examples.

[0116] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0117] Those skilled in the art should understand that the above embodiments are merely for clearly explaining the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above invention, and these changes or modifications are still within the scope of the present invention.

Claims

1. An anti-clogging structure of a carding machine, characterized in that, Including: A collection box (1), a detection component (3), a blowing component (2) and a waste discharge channel (4). The collection box (1) is arranged directly below the carding wheel of a carding machine. The detection component (3) and the blowing component (2) are both arranged inside the collection box (1). A waste discharge window communicating with the waste discharge channel (4) is arranged on the side of the collection box (1). The air outlet direction of the blowing component (2) faces the waste discharge window. Both the detection component (3) and the blowing component (2) are electrically connected to a control terminal.

2. The anti-clogging structure of a carding machine according to claim 1, characterized in that, It is set that the waste discharge window is arranged on the first side of the collection box (1) and is connected to the third side of the collection box (1). The second side of the collection box (1) is arranged opposite to the first side of the collection box (1). The third side of the collection box (1) is arranged opposite to the fourth side of the collection box (1). The detection component (3) is arranged on the fourth side of the collection box (1). The blowing component (2) is arranged on the second side and the fourth side of the collection box (1).

3. The anti-clogging structure of a carding machine according to claim 2, characterized in that, The detection component (3) includes a plurality of infrared ranging sensors, and the plurality of infrared ranging sensors are arranged in an array on the fourth side of the collection box (1). The blowing component (2) includes a plurality of nozzles and a positive pressure device. The plurality of nozzles are communicated with the air outlet of the positive pressure device through air pipes. The plurality of nozzles are arranged in an array on the fourth side and the third side of the collection box (1). The central axes of the plurality of nozzles all point to the center point of the waste discharge window.

4. The anti-clogging structure of a carding machine according to claim 3, characterized in that, The blowing component (2) further includes a plurality of enhanced nozzles, and the enhanced nozzles are arranged on the second side of the collection box (1) and are arranged opposite to the waste discharge window.

5. A control method for an anti-clogging structure of a carding machine, characterized in that, Running in the control terminal of an anti-clogging structure of a carding machine as described in any one of claims 1-4, the control method includes: Obtaining the measurement values collected by a plurality of infrared ranging sensors and processing the measurement values to obtain a filtered signal. Setting a trigger condition. If the filtered signal reaches the trigger condition, then controlling the blowing component to switch the air volume mode.

6. The control method of the anti-clogging structure of a carding machine according to claim 5, characterized in that The method for obtaining the measurement values collected by a plurality of infrared ranging sensors includes: Determine the i-th infrared ranging sensor IR i The emission intensity at the k-th global sampling Set the global sampling period to T cycle , and perform M rounds of sampling within a global sampling period. In the m-th round of sampling, activate some infrared ranging sensors to turn on the infrared emission, and obtain the set Φ of the indexes of the activated sensors m , where m = 1, 2,..., M N is the number of infrared ranging sensors; Perform R rapid readings on all active sensors to obtain sensor readings where i ∈ Φ m , r = 1, 2, ..., R, t k = k·T cycle is the sampling time; Obtain the preliminary measurement value of the i-th activated infrared ranging sensor at the k-th global sampling and the m-th round of sampling Obtain the original measurement value of the i-th activated infrared ranging sensor at the k-th global sampling wherein, is the set of activation rounds of the i-th sensor within the k-th global sampling period.

7. The control method of the anti-clogging structure of a carding machine according to claim 6, characterized in that, Method for determining emission intensity includes: Set the initial emission intensity of the i-th infrared ranging sensor IR i ​ Iterate based on the initial emission intensity until the original measured value Z of the (k-1)-th global sampling is obtained i (t k-1 ); Set the upper limit X of the original measurement value max and the lower limit X of the original measurement value min ; If Z i (t k-1 ) ≤ X min , then let If Z i (t k-1 ) ≥ X max , then let If X min <Z i (t k-1 ) < X max , then let where ΔI is the emission intensity adjustment range.

8. The control method of the anti-blocking structure of a carding machine according to claim 6, characterized in that, The method for processing the measurement values to obtain a filtered signal includes: Obtain M preliminary measurement values of the i-th sensor in the k-th global sampling For M preliminary measurement values perform extreme value comparison; when a preliminary measurement value exceeds the preset upper and lower limit thresholds or is an outlier, it is determined as an abnormal value and removed to obtain pure measurement values; Performing an average process on the pure measurement values within a fixed-length sliding window in adjacent several sampling periods to obtain a short-term smoothed value. The short-term smoothed value is weighted and fused with the long-term smoothed value at time t k-1 according to a preset smoothing coefficient to generate a new long-term smoothed value in a recursive form, and the new long-term smoothed value is used as the filtered signal.

9. The control method of the anti-clogging structure of a carding machine according to claim 6, characterized in that, The trigger conditions include a large air volume trigger condition and a small air volume trigger condition. Independently judging the trigger conditions of each infrared ranging sensor. If the filtered signal of any one infrared ranging sensor reaches the large air volume trigger condition, then controlling the blowing component to work in the large air volume mode. If the filtered signals of all infrared ranging sensors reach the small air volume trigger condition, then controlling the blowing component to work in the small air volume mode.

10. The control method of the anti-clogging structure of a carding machine according to claim 6, characterized in that, The method for controlling the switching of the air volume mode through the infrared ranging sensors includes: Set the warning threshold T for each infrared ranging sensor warn，i and the overrun threshold T crit，i , T crit，i > T warn，i ; Set the entry threshold S in，i and the exit threshold S out，i , S out，i < S in，i ; Let the initial integral score be S i (t0) = 0, and it is default to start in the low air volume mode; Obtain the filtered signal F at the k-th sampling period i (t k ); Calculate the instantaneous excess value H i (t k ) = max{0, F i (t k ) - T warn，i}; Calculate the overrun factor Calculate the integral score S i (t k ) = α i ·S i (t k-1 ) + β i ·H i (t k ) + γ i ·δ i (t k ), where α i ∈(0, 1) is a given attenuation coefficient, β i and γ i are weight coefficients; Iteratively calculate the integral score S for the (k + 1)-th sampling period i (t k+1 ); If the integral scores for consecutive n sampling periods are all greater than S in，i , then switch to the high air volume mode; If the integral scores for consecutive n sampling periods are all less than S out，i , then switch to the low air volume mode.

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