A method for forming a chenille yarn based on multi-motor cooperative control

Abstract

The application provides a method for forming a chenille yarn based on multi-motor cooperative control, which specifically comprises the following steps: detecting a control signal and setting initial operation parameters of each motor based on the control signal; controlling the operation of each motor based on the set initial operation parameters, and processing the chenille yarn; collecting yarn tension and output speed of the output chenille yarn in real time, constructing a chenille yarn forming quality curve based on feeding information during chenille yarn processing and in combination with the collected yarn tension and output speed; determining motor abnormal operation based on the chenille yarn forming quality curve, and adjusting the initial operation parameters of the corresponding abnormal motor in combination with the chenille yarn forming quality curve according to the motor abnormal operation determination result. The application can monitor the forming quality of the chenille yarn in real time, thereby positioning motor operation abnormalities, adjusting the parameters of the motor, and guaranteeing the yarn forming quality of the chenille yarn.

Description

Technical Field

[0001] This invention relates to the field of chenille yarn textile technology, and in particular to a chenille yarn forming method based on multi-motor collaborative control. Background Technology

[0002] Chenille yarn, also known as corduroy, is a new type of fancy yarn. It is made by twisting two strands of yarn as the core, sandwiching the downy yarn between them. During the production of chenille yarn, to ensure the quality and consistency of the yarn, it is necessary to strictly control the production parameters at each stage, such as temperature, humidity, and speed. However, in existing chenille yarn production equipment, the motors can only be controlled according to predetermined parameters during production. This often ignores the impact of factors such as equipment aging on the yarn quality, resulting in motors not performing as expected. Consequently, the obtained chenille yarn has a lower yarn quality. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies that can only control the production of chenille yarn according to predetermined parameters. During operation, factors such as equipment aging can affect the motor's performance, leading to poor yarn quality. This invention provides a chenille yarn forming method based on multi-motor collaborative control. The forming quality of the chenille yarn is monitored in real time by measuring the yarn tension and output speed. Abnormalities in the forming quality of the chenille yarn can be used to locate abnormalities in motor operation. Then, the motor parameters can be adjusted according to the abnormalities to ensure the forming quality of the chenille yarn.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A method for forming chenille yarn based on multi-motor cooperative control includes,

[0006] Detect control signals and set initial operating parameters for each motor based on the control signals;

[0007] Based on the set initial operating parameters, each motor is controlled to operate and chenille yarn is processed.

[0008] The yarn tension and output speed of the chenille yarn are collected in real time. Based on the yarn feeding information during chenille yarn processing, the collected yarn tension and output speed are combined to construct the chenille yarn forming quality curve.

[0009] Based on the chenille yarn forming quality curve, abnormal motor operation is determined, and the initial operating parameters of the corresponding abnormal motor are adjusted according to the motor abnormal operation determination results and the chenille yarn forming quality curve.

[0010] Furthermore, the setting of initial operating parameters for each motor based on control signals includes,

[0011] The forming requirements of chenille yarn are determined based on the control signals;

[0012] Based on the molding requirements, match the corresponding standard operating parameters and determine the influencing factors of each motor's operation;

[0013] Calculate the degree of influence of each influencing factor on the motor's operating performance, and calculate the correction value according to the corresponding degree of influence calculation results;

[0014] The standard operating parameters are adjusted based on the calculation results of the correction values ​​to obtain the initial operating parameters for each motor.

[0015] Furthermore, the step of setting the initial operating parameters of each motor based on the control signal also includes,

[0016] Retrieve the motor control information corresponding to the historical molding process of chenille yarn, determine the start-up time correlation between motors based on the motor control information, and determine the start-up time of each motor based on the start-up time correlation information;

[0017] Obtain the current idle position of each motor and determine the initial position of the control object corresponding to each motor;

[0018] And perform preliminary adjustment judgments based on the initial position of the controlled object;

[0019] Based on the results of the pre-adjustment judgment, the pre-adjustment control command is formulated according to the start time of each motor and the initial position of the corresponding controlled object;

[0020] Pre-adjustment is performed according to the pre-adjustment control command, controlling each motor and its corresponding controlled object to the preset position.

[0021] Furthermore, the construction of the chenille yarn forming quality curve based on the yarn feeding information during chenille yarn processing, combined with the collected yarn tension and output speed, includes:

[0022] Based on the yarn feeding information during chenille yarn processing, the yarn feeding length per unit time is obtained, and the yarn output length of chenille yarn per unit time is obtained according to the output speed.

[0023] The yarn conversion rate is calculated based on the yarn feed length and yarn output length per unit time, and the yarn tension collected per unit time is obtained.

[0024] Based on the yarn conversion rate and average yarn tension per unit time, the corresponding chenille yarn forming quality score is obtained.

[0025] A chenille yarn forming quality curve is constructed based on the forming quality score of chenille yarn per unit time.

[0026] Furthermore, the process of obtaining the forming quality score of chenille yarn based on the yarn conversion rate and average yarn tension per unit time includes,

[0027] The forming requirements of chenille yarn are determined based on the control signals, and the forming stages of chenille yarn are divided according to the forming requirements of chenille yarn.

[0028] Based on the molding requirements corresponding to each molding stage, set standard values ​​for yarn conversion rate and yarn tension to determine the molding stage at each unit of time.

[0029] Based on the standard values ​​of yarn conversion rate and yarn tension at the corresponding forming stage, the average yarn conversion rate and yarn tension for each unit of time are scored.

[0030] The scores for the corresponding yarn conversion rate and average yarn tension are weighted and summed to obtain the forming quality score of chenille yarn per unit time.

[0031] Furthermore, the method for determining abnormal motor operation based on the chenille yarn forming quality curve includes,

[0032] The chenille yarn forming quality curve is periodically compared with the preset standard forming quality value;

[0033] Filter out the unit time within the current cycle where the deviation between the chenille yarn forming quality curve and the standard forming quality value exceeds a preset threshold.

[0034] If the deviation exceeds the preset threshold for several consecutive units of time, and the number of units of time exceeding the preset threshold exceeds the set value, or if the units of time with deviation exceeding the preset threshold have a periodic characteristic, then the motor is judged to be operating abnormally in the current cycle.

[0035] In other cases, it is determined that the motor is operating normally within the current cycle.

[0036] Furthermore, the method of determining abnormal motor operation based on the chenille yarn forming quality curve also includes determining the unit time during which the deviation exceeds a preset threshold, retrieving the yarn tension and output speed of the corresponding unit time, locating the abnormal motor based on the corresponding yarn tension and output speed of the unit time, and determining the cause of the abnormality.

[0037] Furthermore, the step of adjusting the initial operating parameters of the corresponding abnormal motor based on the abnormal motor operation judgment result and the chenille yarn forming quality curve includes: determining the adjustment parameter based on the abnormal cause determined in the current cycle; determining the adjustment value of the adjustment parameter based on the deviation between the chenille yarn forming quality curve per unit time and the standard forming quality value; and adjusting the initial operating parameters of the corresponding abnormal motor based on the adjustment value of the adjustment parameter.

[0038] The beneficial effects of this invention are:

[0039] The forming quality of the chenille yarn is monitored in real time by measuring the yarn tension and output speed. Abnormalities in the forming quality of the chenille yarn can be used to locate abnormalities in the motor operation. Then, the motor parameters can be adjusted according to the abnormalities in the motor operation to ensure the forming quality of the chenille yarn.

[0040] Furthermore, the production process of chenille yarn often requires the coordinated control of multiple types of motors. Since different motors are involved in different stages of chenille yarn production, their equipment aging levels also differ with the length of time the equipment has been running. When the yarn forming quality of the obtained chenille yarn is abnormal, the specific abnormal motor may be different. Therefore, when an abnormality is detected, the abnormal motor can be located based on the current specific operating conditions, and only the parameters of the abnormal motor can be adjusted to avoid affecting the operation of other normal motors. Attached Figure Description

[0041] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0043] Example:

[0044] A method for forming chenille yarn based on multi-motor cooperative control, such as Figure 1 As shown, including,

[0045] Detect control signals and set initial operating parameters for each motor based on the control signals;

[0046] Based on the set initial operating parameters, each motor is controlled to operate and chenille yarn is processed.

[0047] The yarn tension and output speed of the chenille yarn are collected in real time. Based on the yarn feeding information during chenille yarn processing, the collected yarn tension and output speed are combined to construct the chenille yarn forming quality curve.

[0048] Based on the chenille yarn forming quality curve, abnormal motor operation is determined, and the initial operating parameters of the corresponding abnormal motor are adjusted according to the motor abnormal operation determination results and the chenille yarn forming quality curve.

[0049] In this embodiment, the motors for controlling the chenille yarn forming process specifically include two roller motors, two spindle motors, one yarn feeding motor, and one rotary motor. The two roller motors and the yarn feeding motor are stepper motors, and the two spindle motors and the rotary motor are brushless DC motors.

[0050] The control signal is issued by selecting the chenille yarn production type. Specifically, the chenille yarn production type can be set in advance according to the chenille yarn production parameters such as the raw materials used, the chenille yarn pattern, and the yarn bobbin type.

[0051] Furthermore, in the process of controlling the formation of chenille yarn, the yarn tension of the output chenille yarn is collected through a yarn tension meter or a piezoelectric sensor, and the output speed of the output chenille yarn is collected through a yarn detector.

[0052] The yarn feeding information during chenille yarn processing can be determined based on the operating status of the corresponding yarn feeding motor.

[0053] The yarn feeding motor drives the conveyor rollers or other related components to transport the raw yarn of chenille yarn from the source to the target position for chenille yarn spinning. Therefore, by monitoring and controlling the operating status of the yarn feeding motor, information such as yarn feeding speed and yarn length can be obtained.

[0054] Specifically, the rotational speed of the wire feeding motor can be measured by a sensor to calculate the wire feeding speed. Combined with the running time of the wire feeding motor, the corresponding wire feeding length can be calculated.

[0055] The setting of initial operating parameters for each motor based on control signals includes,

[0056] The forming requirements of chenille yarn are determined based on the control signals;

[0057] Based on the molding requirements, match the corresponding standard operating parameters and determine the influencing factors of each motor's operation;

[0058] Calculate the degree of influence of each influencing factor on the motor's operating performance, and calculate the correction value according to the corresponding degree of influence calculation results;

[0059] The standard operating parameters are adjusted based on the calculation results of the correction values ​​to obtain the initial operating parameters for each motor.

[0060] The control signal contains information on the production type of chenille yarn. Based on this information, the forming requirements of the chenille yarn can be determined. After determining the forming requirements, yarn process parameters set based on historical chenille yarn production conditions can be retrieved, such as the equipment speed, tension control parameters, position control parameters, temperature control parameters, and error detection parameters of the chenille yarn production equipment. These parameters can then be used as standard operating parameters.

[0061] Furthermore, since motor operating fluctuations are affected not only by equipment aging but also by environmental factors such as voltage fluctuations, power, and load, obtaining initial operating parameters allows us to identify influencing factors such as power supply voltage and current, load and inertia, magnets and coils, and frequency. Based on historical operating data, we can then determine the impact of each factor on motor operation. For example, insufficient voltage or current negatively affects motor speed and torque; damaged magnets or coils negatively affect motor speed and torque; and frequency negatively affects motor speed and power. Specifically, the yarn output during motor operation can be used as a measure of motor performance. By combining historical chenille yarn forming information with corresponding motor operating conditions, we can determine the degree of influence of each factor on the motor's performance.

[0062] Then, obtain the actual value of each influencing factor, combine it with the calculated degree of influence, obtain the corresponding correction value, and adjust the standard operating parameters to determine the initial operating parameters of each motor under the current operating environment, taking into account the impact of each influencing factor on motor operation.

[0063] The method of setting the initial operating parameters of each motor based on control signals also includes,

[0064] Retrieve the motor control information corresponding to the historical molding process of chenille yarn, determine the start-up time correlation between motors based on the motor control information, and determine the start-up time of each motor based on the start-up time correlation information;

[0065] Obtain the current idle position of each motor and determine the initial position of the control object corresponding to each motor;

[0066] And perform preliminary adjustment judgments based on the initial position of the controlled object;

[0067] Based on the results of the pre-adjustment judgment, the pre-adjustment control command is formulated according to the start time of each motor and the initial position of the corresponding controlled object;

[0068] Pre-adjustment is performed according to the pre-adjustment control command, controlling each motor and its corresponding controlled object to the preset position.

[0069] Although the motor usually resets after completing the chenille yarn spinning process, incomplete resets can occur. Therefore, to ensure effective subsequent motor control, a pre-adjustment judgment is performed. Specifically, this is determined based on the initial position of the controlled object. If the controlled object is not in the preset position before the chenille yarn forming control begins, pre-adjustment is required; otherwise, it is not required.

[0070] Secondly, when making pre-adjustments, since the forming of chenille yarn is divided into multiple stages, each motor corresponds to a different forming stage, and its corresponding start-up time is also different. When coordinating the motors, it is necessary to take into account the operating conditions of the other motors in order to achieve precise control of the motors.

[0071] Therefore, by controlling the distance between the initial position and the corresponding preset position of the object, the adjustment amount of each motor is determined, and then the control command for each motor is determined based on the start time of each motor. The control command includes parameter information such as the start time for controlling each motor to perform pre-adjustment and the operating amount of each motor.

[0072] The process of constructing a chenille yarn forming quality curve based on the yarn feeding information during chenille yarn processing, combined with the collected yarn tension and output speed, includes:

[0073] Based on the yarn feeding information during chenille yarn processing, the yarn feeding length per unit time is obtained, and the yarn output length of chenille yarn per unit time is obtained according to the output speed.

[0074] The yarn conversion rate is calculated based on the yarn feed length and yarn output length per unit time, and the yarn tension collected per unit time is obtained.

[0075] Based on the yarn conversion rate and average yarn tension per unit time, the corresponding chenille yarn forming quality score is obtained.

[0076] A chenille yarn forming quality curve is constructed based on the forming quality score of chenille yarn per unit time.

[0077] Since chenille yarn is woven by twisting two strands as the core yarn and sandwiching the down yarn in the middle, its yarn conversion rate is the correspondence between the input yarn and the output chenille yarn, which can reflect the uniformity of the woven chenille yarn.

[0078] The magnitude, variation, and unevenness of yarn tension directly affect the evenness and weight unevenness of chenille yarn, which are important indicators for evaluating yarn quality. Specifically, when the yarn tension is too high, the yarn is prone to unintended elongation, worsening evenness and increasing breakage. This not only affects the appearance quality of the yarn but may also cause difficulties in subsequent processing. Conversely, when the yarn tension is too low, the yarn winding becomes loose, leading to difficulties in subsequent storage, transportation, and unwinding, which also results in a decline in yarn quality.

[0079] Therefore, yarn conversion rate and yarn tension are used as evaluation indicators for assessing the quality of chenille yarn forming.

[0080] Furthermore, the forming quality per unit time is used as the evaluation unit to refine the evaluation of chenille yarn forming quality.

[0081] The forming quality score of chenille yarn is obtained based on the yarn conversion rate and average yarn tension per unit time, including:

[0082] The forming requirements of chenille yarn are determined based on the control signals, and the forming stages of chenille yarn are divided according to the forming requirements of chenille yarn.

[0083] Based on the molding requirements corresponding to each molding stage, set standard values ​​for yarn conversion rate and yarn tension to determine the molding stage at each unit of time.

[0084] Based on the standard values ​​of yarn conversion rate and yarn tension at the corresponding forming stage, the average yarn conversion rate and yarn tension for each unit of time are scored.

[0085] The scores for the corresponding yarn conversion rate and average yarn tension are weighted and summed to obtain the forming quality score of chenille yarn per unit time.

[0086] Because chenille yarn varies in style, the specific operating parameters may change within the same forming process due to variations in style. For example, different diameter yarns may be produced at different stages to create specific chenille yarn styles. Furthermore, the ideal parameters will differ for different production stages as the operating parameters are adjusted according to requirements. Therefore, forming stages are first divided based on the forming requirements of the chenille yarn, thereby determining the standard values ​​for yarn conversion rate and yarn tension at each stage to ensure the accuracy of subsequent forming quality assessment results.

[0087] The method for determining abnormal motor operation based on the chenille yarn forming quality curve includes:

[0088] The chenille yarn forming quality curve is periodically compared with the preset standard forming quality value;

[0089] Filter out the unit time within the current cycle where the deviation between the chenille yarn forming quality curve and the standard forming quality value exceeds a preset threshold.

[0090] If the deviation exceeds the preset threshold for several consecutive units of time, and the number of units of time exceeding the preset threshold exceeds the set value, or if the units of time with deviation exceeding the preset threshold have a periodic characteristic, then the motor is judged to be operating abnormally in the current cycle.

[0091] In other cases, it is determined that the motor is operating normally within the current cycle.

[0092] While transient voltage fluctuations can also cause abnormal fluctuations in motor operation, these fluctuations will disappear once the voltage returns to normal. They are irregular, transient anomalies that can recover automatically. Therefore, abnormal motor operation is only judged to be abnormal when abnormal fluctuations exist for a long time or when the fluctuations have periodic characteristics, so as to optimize the adjustment and control of the motor.

[0093] The method of determining abnormal motor operation based on the chenille yarn forming quality curve also includes determining the unit time during which the deviation exceeds a preset threshold, retrieving the yarn tension and output speed of the corresponding unit time, locating the abnormal motor based on the yarn tension and output speed of the corresponding unit time, and determining the cause of the abnormality.

[0094] When a motor malfunctions, the cause affecting its molding quality can be determined by examining the specific yarn tension and output speed. Specifically, the malfunctioning motor can be identified by checking the yarn tension and output speed, which deviate significantly from the corresponding standard values. The cause of the malfunction can then be determined based on the specific operating parameters of the malfunctioning motor.

[0095] When determining the cause of an anomaly, the specific operating parameters of the abnormal motor can be matched with the characteristic data of the abnormal motor operation, and the specific cause of the anomaly can be determined based on the matching results.

[0096] The step of adjusting the initial operating parameters of the corresponding abnormal motor based on the abnormal motor operation judgment result and the chenille yarn forming quality curve includes: determining the adjustment parameter based on the abnormal cause determined in the current cycle; determining the adjustment value of the adjustment parameter based on the deviation between the chenille yarn forming quality curve per unit time and the standard forming quality value; and adjusting the initial operating parameters of the corresponding abnormal motor based on the adjustment value of the adjustment parameter.

[0097] After identifying the abnormal motor and its corresponding cause, the adjustment parameters that need to be adjusted can be determined based on the cause. If, after analyzing the cause, it is determined that the problem cannot be resolved by adjusting the parameters, an alarm will be triggered directly, and subsequent chenille yarn forming control will be suspended.

[0098] If it is determined that the issue can be resolved through parameter adjustment, the specific adjustment value can be determined based on the deviation between the chenille yarn forming quality curve and the standard forming quality value, thereby adjusting the initial operating parameters.

[0099] If any abnormal motor operation is found again during subsequent operation after the adjustment is completed, the operating parameters should be adjusted based on the current adjustment.

[0100] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A method for forming chenille yarn based on multi-motor cooperative control, characterized in that, include, Detect control signals and set initial operating parameters for each motor based on the control signals; Based on the set initial operating parameters, each motor is controlled to operate and chenille yarn is processed. The yarn tension and output speed of the chenille yarn are collected in real time. Based on the yarn feeding information during chenille yarn processing, a chenille yarn forming quality curve is constructed by combining the collected yarn tension and output speed. Based on the yarn feeding information during chenille yarn processing, the yarn feeding length per unit time is obtained, and the yarn output length of chenille yarn per unit time is obtained according to the output speed. The yarn conversion rate is calculated based on the yarn feed length and yarn output length per unit time, and the yarn tension collected per unit time is obtained. Based on the yarn conversion rate and average yarn tension per unit time, the corresponding chenille yarn forming quality score is obtained. A chenille yarn forming quality curve is constructed based on the forming quality score of chenille yarn for each unit of time; Based on the chenille yarn forming quality curve, abnormal motor operation is determined. The chenille yarn forming quality curve is periodically compared with the preset standard forming quality value; Filter out the unit time within the current cycle where the deviation between the chenille yarn forming quality curve and the standard forming quality value exceeds a preset threshold. If the deviation exceeds the preset threshold for several consecutive units of time, and the number of units of time exceeding the preset threshold exceeds the set value, or if the units of time with deviation exceeding the preset threshold have a periodic characteristic, then the motor is judged to be operating abnormally in the current cycle. In other cases, it is determined that the motor is operating normally within the current cycle; Based on the results of the abnormal motor operation judgment, the initial operating parameters of the corresponding abnormal motor are adjusted in conjunction with the chenille yarn forming quality curve. When an abnormality is judged, the abnormal motor is located and only the parameters of the abnormal motor are adjusted.

2. The chenille yarn forming method based on multi-motor cooperative control according to claim 1, characterized in that, The setting of initial operating parameters for each motor based on control signals includes, The forming requirements of chenille yarn are determined based on the control signals; Based on the molding requirements, match the corresponding standard operating parameters and determine the influencing factors of each motor's operation; Calculate the degree of influence of each influencing factor on the motor's operating performance, and calculate the correction value according to the corresponding degree of influence calculation results; The standard operating parameters are adjusted based on the calculation results of the correction values ​​to obtain the initial operating parameters for each motor.

3. The chenille yarn forming method based on multi-motor cooperative control according to claim 2, characterized in that, The method of setting the initial operating parameters of each motor based on control signals also includes, Retrieve the motor control information corresponding to the historical molding process of chenille yarn, determine the start-up time correlation between motors based on the motor control information, and determine the start-up time of each motor based on the start-up time correlation information; Obtain the current idle position of each motor and determine the initial position of the control object corresponding to each motor; And perform preliminary adjustment judgments based on the initial position of the controlled object; Based on the results of the pre-adjustment judgment, the pre-adjustment control command is formulated according to the start time of each motor and the initial position of the corresponding controlled object; Pre-adjustment is performed according to the pre-adjustment control command, controlling each motor and its corresponding controlled object to the preset position.

4. The chenille yarn forming method based on multi-motor cooperative control according to claim 1, characterized in that, The forming quality score of chenille yarn is obtained based on the yarn conversion rate and average yarn tension per unit time, including: The forming requirements of chenille yarn are determined based on the control signals, and the forming stages of chenille yarn are divided according to the forming requirements of chenille yarn. Based on the molding requirements corresponding to each molding stage, set standard values ​​for yarn conversion rate and yarn tension to determine the molding stage at each unit of time. Based on the standard values ​​of yarn conversion rate and yarn tension at the corresponding forming stage, the average yarn conversion rate and yarn tension for each unit of time are scored. The scores for the corresponding yarn conversion rate and average yarn tension are weighted and summed to obtain the forming quality score of chenille yarn per unit time.

5. A chenille yarn forming method based on multi-motor cooperative control according to claim 4, characterized in that, The method of determining abnormal motor operation based on the chenille yarn forming quality curve also includes determining the unit time during which the deviation exceeds a preset threshold, retrieving the yarn tension and output speed of the corresponding unit time, locating the abnormal motor based on the yarn tension and output speed of the corresponding unit time, and determining the cause of the abnormality.

6. A chenille yarn forming method based on multi-motor cooperative control according to claim 5, characterized in that, The step of adjusting the initial operating parameters of the corresponding abnormal motor based on the abnormal motor operation judgment result and the chenille yarn forming quality curve includes: determining the adjustment parameter based on the abnormal cause determined in the current cycle; determining the adjustment value of the adjustment parameter based on the deviation between the chenille yarn forming quality curve per unit time and the standard forming quality value; and adjusting the initial operating parameters of the corresponding abnormal motor based on the adjustment value of the adjustment parameter.

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