阅读说明：本技术 一种基于在线监测的细纱断头因素实时关联定位方法 (Real-time correlation positioning method for yarn breakage factor based on online monitoring ) 是由 张保威 江豪 王永华 冯立增 魏敬典 王锦 宋久祥 于 2019-09-25 设计创作，主要内容包括：本发明提出了一种基于在线监测的细纱断头因素实时关联定位方法,其步骤为：首先利用断头监测系统实时监测细纱设备是否出现断头,当出现断头时,利用在线监测系统实现对细纱设备参数数据的实时获取和整合,最后,利用数据关联分析方法对细纱设备参数数据进行分析,查找导致细纱断头的因素,定位出细纱断头因素,并指示相关技术人员进行维修。本发明利用在线监测系统实时获取断头数据、设备状态参数、原棉质量数据和环境参数,再结合数据关联分析方法实时分析设备状态参数、环境参数以及原棉质量数据与断头之间的动态关联分析,找出导致细纱断头的因素,并提醒指示相关人员进行处理,降低断头,提高生产效率。(The invention provides a real-time correlation positioning method for yarn breakage factors based on online monitoring, which comprises the following steps: firstly, a broken end monitoring system is used for monitoring whether the spun yarn equipment has broken ends or not in real time, when the broken ends occur, the online monitoring system is used for realizing the real-time acquisition and integration of the parameter data of the spun yarn equipment, finally, a data association analysis method is used for analyzing the parameter data of the spun yarn equipment, searching the factors causing the broken ends of the spun yarns, positioning the broken end factors of the spun yarns, and indicating related technicians to maintain the spun yarns. The invention utilizes an online monitoring system to acquire broken end data, equipment state parameters, raw cotton quality data and environment parameters in real time, and then analyzes the equipment state parameters, the environment parameters and the dynamic correlation analysis between the raw cotton quality data and the broken ends in real time by combining a data correlation analysis method, finds out factors causing the broken ends of spun yarns, and reminds and indicates related personnel to process, thereby reducing the broken ends and improving the production efficiency.)

1. A real-time correlation positioning method for yarn breakage factors based on online monitoring is characterized by comprising four parts of obtaining real-time parameter data, designing a correlation analysis method, positioning specific factors and indicating related personnel to maintain; the method comprises the following steps:

S1: monitoring whether the spinning equipment has broken ends or not in real time by using a broken end monitoring system, if so, acquiring broken end data, and executing the step S2, otherwise, executing the step S1;

S2: acquiring spinning equipment data in real time by using an online monitoring system, wherein the spinning equipment comprises equipment state parameters, equipment operation parameters, process parameters, raw cotton quality parameters and environment parameters;

S3: and analyzing the data of the spinning equipment by using a data correlation analysis method, searching for factors causing the broken ends of the spun yarns, positioning the broken ends of the spun yarns, and indicating related personnel to process and maintain.

2. The real-time spun yarn breakage factor correlation positioning method based on online monitoring as claimed in claim 1, wherein the method for monitoring the spun yarn equipment by using the breakage monitoring system in the step S1 is as follows:

S11: setting a reasonable process parameter range of the spindle speed of the spinning equipment;

s12: monitoring whether the speed of the spindle exceeds a reasonable process parameter range or not in real time by using a broken end monitoring system encoder, if so, executing a step S13, otherwise, executing a step S12;

s13: and searching for the abnormal single spun yarn spindle in the spindle by using the single spun yarn spindle monitoring system, recording the position of the broken end and the serial number of the single spun yarn spindle, and reminding related personnel to process the broken end.

3. the real-time spun yarn breakage factor correlation positioning method based on online monitoring as claimed in claim 1 or 2, wherein the monitoring method for spun yarn equipment data by using the online monitoring system is as follows:

S21: setting reasonable process ranges of equipment state, equipment operation, process, raw cotton quality and environment, wherein the equipment state comprises a steel wire ring state and a steel collar state, the equipment operation comprises spindle speed, the process comprises twist, the raw cotton quality comprises roving strength and evenness, and the environment comprises temperature and humidity;

s22: monitoring several pieces of equipment data exceeding the reasonable process parameter range in real time by using an online monitoring system, if only one piece of equipment data is detected, executing a step S23, otherwise, executing a step S24;

s23: judging that the equipment data is a factor causing the broken ends of the spun yarns, and informing workers of timely adjustment;

S24: and performing correlation analysis on all equipment data by using a data correlation analysis method, and searching factors causing the broken ends of the spun yarns.

4. The real-time spun yarn broken end factor correlation positioning method based on online monitoring as claimed in claim 3, wherein the implementation method for searching the factor causing the broken end of the spun yarn by using the data correlation analysis method is as follows:

s31: acquiring related original data of spinning equipment through an online monitoring system, wherein the related original data comprises eight variables of a traveler state, a ring state, a spindle speed, a twist degree, roving strength, yarn evenness, temperature and humidity;

S32: standardizing related original data by using interval valued operators according to respective process parameter ranges of the eight variables to obtain standardized variable data;

S33: calculating a correlation coefficient between the normalized variable data at the moment k and the broken ends of the spun yarns according to a correlation coefficient formula;

s34: calculating the correlation degree between the normalized variable data at the time k and the broken ends of the spun yarns by using a correlation degree formula according to the correlation coefficient in the step S33;

s35: the degrees of association in step S34 are sorted, and the variable corresponding to the maximum degree of association is used as a factor of yarn breakage.

5. The real-time spun yarn broken end factor correlation positioning method based on online monitoring as claimed in claim 4, wherein the method for normalizing the related original data by using an interval valued operator in step S32 is as follows: x_j(k)D＝(x_j(k-n)d,x_j(k-n+1)d,…,x_j(k) D), where D is an interval operator, j is 1,2, …,8 denotes the jth variable, X_j(k)＝(x_j(k-n),x_j(k-n+1),…,x_j(k) is a set of values for the variable j at time k,n is the number of times from the k to the nearest normal operation of the spinning equipment.

6. The real-time correlation positioning method for yarn breakage factor based on online monitoring as claimed in claim 5, wherein the correlation coefficient ξ between the normalized variable data at the time k and the yarn breakage is_oj(k) comprises the following steps:Wherein, alpha is a resolution coefficient, and alpha belongs to (0, 1)]， x_o(k) is the output value at the time k, the output value is 0 or 1, 1 represents the broken end of the spun yarn at the time k, 0 represents the unbroken end of the spun yarn at the time k, and x_j(k) Is the value of the j-th variable at time k, Δ_oj(k)＝|x_o(k)-x_j(k) And | is the difference between the value of the variable j and the output value at time k.

7. The real-time correlation positioning method for yarn breakage factor based on online monitoring as claimed in claim 6, wherein the correlation degree γ between the normalized variable data at the time k and the yarn breakage is_oj(k) Comprises the following steps:

Technical Field

the invention relates to the technical field of yarn breakage monitoring, in particular to a real-time correlation positioning method for yarn breakage factors based on online monitoring.

Background

The broken ends are the most common phenomenon in spinning equipment, in the traditional method, whether the spindle is broken is judged mainly by naked eyes, the spindle is connected by a stop worker after the broken ends are found, frequent yarn breakage not only affects the yield, but also can cause the quality of produced yarns to be unqualified, so that the reason of the broken ends is very concerned in the production process, namely what affects the broken ends of single spindle yarns, and the broken ends can be really reduced and the efficiency can be improved only by finding the reason affecting the yarns and improving the reason. The factors influencing broken ends are many, the factors mainly comprise equipment states, the quality of yarns and the temperature and humidity environment of a workshop, and under the mode of the traditional method, the data are acquired by means of sampling type off-line detection and are generally periodic manual detection, the qualitative analysis of long-term broken yarn factors can be achieved by combining the detected data, but real-time quantitative accurate analysis cannot be achieved, and the specific reasons of the broken yarns cannot be accurately positioned through the broken end condition.

With the progress and development of the technology, the spun yarn single spindle detection technology and the online monitoring system of the equipment exist at present, and the single spindle broken end condition and the factors influencing the broken yarn can be obtained in real time. The single spindle detection technology is newly developed in nearly two years and is used for monitoring the current broken end condition of each spindle of the spinning equipment in real time, whether the spindle is broken is judged by monitoring the speed of a single spindle, and a spinning single spindle monitoring system can remind the position of the broken end and the spindle number in real time. The equipment on-line monitoring system can monitor each state parameter and signal of the equipment in real time, including real-time operation parameter signals of the equipment, yarn quality data and workshop environment signals. Before the real-time equipment monitoring is not available, the data cannot be obtained, namely, the yarn breakage factor is not analyzed, the relation between the state parameter of the equipment, the environmental parameter and the raw cotton quality data and the yarn breakage can be correlated and analyzed by combining the obtained data with a related algorithm, and then the corresponding reason is found, so that the production efficiency is improved reversely.

disclosure of Invention

the invention provides a real-time spun yarn broken end factor correlation positioning method based on online monitoring, aiming at the technical problem that the production efficiency is low because the existing detection method of the broken end factor of the spun yarn cannot acquire the state parameters of equipment and cannot position the broken end factor of the spun yarn.

The technical scheme of the invention is realized as follows:

A real-time correlation positioning method for yarn breakage factors based on online monitoring comprises four parts, namely acquiring real-time parameter data, designing a correlation analysis method, positioning specific factors and indicating related personnel to maintain; the method comprises the following steps:

S1: monitoring whether the spinning equipment has broken ends or not in real time by using a broken end monitoring system, if so, acquiring broken end data, and executing the step S2, otherwise, executing the step S1;

s2: acquiring spinning equipment data in real time by using an online monitoring system, wherein the spinning equipment comprises equipment state parameters, equipment operation parameters, process parameters, raw cotton quality parameters and environment parameters;

S3: and analyzing the data of the spinning equipment by using a data correlation analysis method, searching for factors causing the broken ends of the spun yarns, positioning the broken ends of the spun yarns, and indicating related personnel to process and maintain.

in step S1, the method for monitoring the spinning device by using the broken end monitoring system is as follows:

S11: setting a reasonable process parameter range of the spindle speed of the spinning equipment;

s12: monitoring whether the speed of the spindle exceeds a reasonable process parameter range or not in real time by using a broken end monitoring system encoder, if so, executing a step S13, otherwise, executing a step S12;

S13: and searching for the abnormal single spun yarn spindle in the spindle by using the single spun yarn spindle monitoring system, recording the position of the broken end and the serial number of the single spun yarn spindle, and reminding related personnel to process the broken end.

The method for monitoring the data of the spinning equipment by using the online monitoring system comprises the following steps:

S21: setting reasonable process ranges of equipment state, equipment operation, process, raw cotton quality and environment, wherein the equipment state comprises a steel wire ring state and a steel collar state, the equipment operation comprises spindle speed, the process comprises twist, the raw cotton quality comprises roving strength and evenness, and the environment comprises temperature and humidity;

s22: monitoring several pieces of equipment data exceeding the reasonable process parameter range in real time by using an online monitoring system, if only one piece of equipment data is detected, executing a step S23, otherwise, executing a step S24;

S23: judging that the equipment data is a factor causing the broken ends of the spun yarns, and informing workers of timely adjustment;

s24: and performing correlation analysis on all equipment data by using a data correlation analysis method, and searching factors causing the broken ends of the spun yarns.

The method for searching the factors causing the yarn breakage by using the data correlation analysis method comprises the following steps:

S31: acquiring related original data of spinning equipment through an online monitoring system, wherein the related original data comprises eight variables of a traveler state, a ring state, a spindle speed, a twist degree, roving strength, yarn evenness, temperature and humidity;

S32: standardizing related original data by using interval valued operators according to respective process parameter ranges of the eight variables to obtain standardized variable data;

S33: calculating a correlation coefficient between the normalized variable data at the moment k and the broken ends of the spun yarns according to a correlation coefficient formula;

S34: calculating the correlation degree between the normalized variable data at the time k and the broken ends of the spun yarns by using a correlation degree formula according to the correlation coefficient in the step S33;

s35: the degrees of association in step S34 are sorted, and the variable corresponding to the maximum degree of association is used as a factor of yarn breakage.

The method for normalizing the related original data by using the interval valued operator in the step S32 includes: x_j(k)D＝(x_j(k-n)d，x_j(k-n+1)d，…，x_j(k) d), where D is an interval operator, j is 1,2, …,8 denotes the jth variable, X_j(k)＝(x_j(k-n),x_j(k-n+1),…,x_j(k) Is a set of values for the variable j at time k,n is the number of times from the k to the nearest normal operation of the spinning equipment.

the correlation coefficient xi between the normalized variable data at the time k and the broken ends of the spun yarns_oj(k) comprises the following steps:Wherein, alpha is a resolution coefficient, and alpha belongs to (0, 1)]， xo (k) is an output value at the time of k, the output value is 0 or 1, 1 represents the broken end of the spun yarn at the time of k, 0 represents the unbroken end of the spun yarn at the time of k, and x_j(k) is the value of the j-th variable at time k, Δ_oj(k)＝|x_o(k)-x_j(k) And | is the difference between the value of the variable j and the output value at time k.

the degree of association gamma between the normalized variable data at the time k and the broken ends of the spun yarn_oj(k) comprises the following steps:

the beneficial effect that this technical scheme can produce: the invention utilizes a data correlation analysis method to analyze the dynamic correlation analysis of the broken end data and the equipment state parameters, the raw cotton quality data and the environment parameters in real time, finds out the reason of the broken ends of the spun yarns in time, and reminds related personnel to process the broken ends so as to reduce the broken ends.

Drawings

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a diagram of a real-time correlation positioning system for broken ends of spun yarns.

FIG. 2 is a flow chart of real-time correlation positioning of broken ends of spun yarns.

Fig. 3 is a block diagram of a system for monitoring a break in accordance with the present invention.

FIG. 4 is a block diagram of an online monitoring system of the present invention.

FIG. 5 is a flow chart of a data association analysis method of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

A real-time spun yarn broken end factor correlation positioning method based on-line monitoring comprises the steps of firstly, utilizing a broken end monitoring system to monitor whether a spun yarn device has broken ends or not in real time, utilizing the on-line monitoring system to achieve real-time acquisition and integration of spun yarn device parameter data when the broken ends occur, finally, utilizing a data correlation analysis method to analyze the spun yarn device parameter data, searching for a factor causing the broken ends of the spun yarns, positioning the broken end factor of the spun yarns, and indicating related technical personnel to maintain.

As shown in fig. 1 and 2, a real-time correlation positioning method for a yarn breakage factor based on online monitoring includes four parts, namely, acquiring real-time parameter data, designing a correlation analysis method, positioning specific factors and indicating related personnel to maintain; the method comprises the following specific steps:

S1: and (4) monitoring whether the spinning equipment has broken ends or not in real time by using a broken end monitoring system, if so, acquiring broken end data, and executing the step S2, otherwise, executing the step S1.

as shown in fig. 3, the broken end monitoring system can judge whether the spindle is broken by monitoring the speed of the spindle, and can remind the position of the broken end and the number of the single spindle in real time; therefore, the broken end monitoring system can monitor the current broken end condition of the spinning equipment spindle in real time. When the broken ends of a certain spindle in the spun yarn frequently occur, the broken end monitoring system can acquire the data of equipment state parameters, equipment operation parameters, process parameters, raw cotton quality data and environment parameters in real time according to the serial number and position association online monitoring system of the single spindle in the spindle, and further judge the broken end factors of the spun yarn. The method for monitoring the spinning equipment by using the broken end monitoring system comprises the following steps:

S11: setting the reasonable process parameter range of the spindle speed of the spinning equipment to be 12000-20000 revolutions per minute;

S12: monitoring whether the speed of the spindle exceeds a reasonable process parameter range or not in real time by utilizing an encoder of a broken end monitoring system, if so, executing a step S13, otherwise, executing a step S12;

S13: the single-spindle spun yarn monitoring system can be used for monitoring whether the single spindle spun yarn in the spindle is broken or not in real time, if the single spindle spun yarn is broken, workers are reminded of processing in time, and meanwhile the position of the broken end and the serial number of the single spindle spun yarn are recorded.

S2: and acquiring parameter data of the spinning equipment in real time by using an online monitoring system, wherein the spinning equipment comprises equipment state parameters, equipment operation parameters, process parameters, raw cotton quality parameters and environment parameters.

As shown in fig. 4, the online monitoring system monitors the device status parameter, the device operation parameter, the process parameter, the raw cotton quality data, the environment parameter, and the like in real time, and in the spun yarn production, the device status parameter, the device operation parameter, the process parameter, the raw cotton quality data, and the environment parameter all have standard production parameter ranges, and the ranges corresponding to the spun yarn device parameters are all referred to as "reasonable process parameter ranges". If the online monitoring system monitors that only the data of a certain spinning equipment parameter exceeds the reasonable process parameter range, the spinning equipment parameter is judged to be the factor causing the broken ends of the spun yarns. If a plurality of spinning equipment parameters exceed the reasonable process parameter range, the main factors causing frequent spinning broken ends in the spinning production process are analyzed by a data association analysis method. The method for monitoring the data of the spinning equipment by using the online monitoring system comprises the following steps:

s21: setting reasonable process ranges of equipment state parameters, equipment operation parameters, process parameters, raw cotton quality parameters and environment parameters, wherein the equipment state comprises a steel wire ring state and a ring state, the equipment operation comprises spindle speed, the process comprises twist, the raw cotton quality comprises roving strength and evenness, the environment comprises temperature and humidity, the service time of the steel wire ring is 7-30 days and the service time of the ring is 12 years, the reasonable process parameter range of the spindle speed is 12000-20000 revolutions per minute, the reasonable process parameter range of the roving strength and the evenness is 3.2-4%, and the reasonable process parameter range of the temperature is 45-65%; the reasonable technological parameter range of the humidity is 18-40 ℃;

S22: monitoring several pieces of equipment data exceeding the reasonable process parameter range in real time by using an online monitoring system, if only one piece of equipment data is detected, executing a step S23, otherwise, executing a step S24;

s23: the data of the equipment can be judged to be the factor causing the broken ends of the spun yarns according to the reasonable process range of the equipment parameters, and related workers are informed to carry out processing and maintenance in time so as to avoid the frequent broken ends and reduce the production efficiency;

S24: and performing correlation analysis on all equipment data by using a data correlation analysis method, and searching factors causing the broken ends of the spun yarns.

s3: and analyzing the data of the spinning equipment by using a data correlation analysis method, searching for a factor causing the broken ends of the spun yarns, and positioning the broken end factor of the spun yarns.

as shown in fig. 5, the method for searching for the factor causing the yarn breakage by using the data association analysis method includes:

S31: acquiring related original data of spinning equipment through an online monitoring system, wherein the related original data comprises eight variables of a traveler state, a ring state, a spindle speed, a twist degree, roving strength, yarn evenness, temperature and humidity;

s32: standardizing related original data by using interval valued operators according to respective process parameter ranges of the eight variables to obtain standardized variable data; the method for standardizing the related original data by using the interval valued operator comprises the following steps: x_j(k)D＝(x_j(k-n)d,x_j(k-n+1)d,…,x_j(k) D), where D is an interval operator, j is 1,2, …,8 denotes the jth variable, X_j(k)＝(x_j(k-n),x_j(k-n+1),…,x_j(k) Is a set of values for the variable j at time k,n is the number of times from the k to the nearest normal operation of the spinning equipment.

S33: calculating a correlation coefficient between the normalized variable data at the moment k and the broken ends of the spun yarns according to a correlation coefficient formula; the correlation coefficient xi between the normalized variable data at the time k and the broken ends of the spun yarns_oj(k) comprises the following steps:Wherein, alpha is a resolution coefficient, and alpha belongs to (0, 1)]， xo (k) is an output value at the time of k, the output value is 0 or 1, 1 represents the broken end of the spun yarn at the time of k, 0 represents the unbroken end of the spun yarn at the time of k, and x_j(k) Is the value of the j-th variable at time k, Δ_oj＝|x_o(k)-x_j(k) i is k time variationThe difference between the value of quantity j and the output value. The resolution coefficient is generally equal to or less than 0.5, i.e. alphathe inner value has a maximum information and a maximum information resolution.

s34: calculating the correlation degree between the normalized variable data at the time k and the broken ends of the spun yarns by using a correlation degree formula according to the correlation coefficient in the step S33; the correlation degree gamma between the normalized variable data at the k-computing time and the broken ends of the spun yarns_oj(k) Comprises the following steps:

s35: the degrees of association in step S34 are sorted, and the variable corresponding to the maximum degree of association is used as a factor of yarn breakage.

assume an output value x_owith the value x of each input variable_jrespectively is x₁、x₂、x₃、x₄、x₅、x₆、x₇And x₈. When correlation coefficient x_jWhen (j) is not 0, the yarn is broken due to the influence of the corresponding factor having a correlation coefficient of not zero. When only one of the correlation coefficients is not 0, the spun yarn is influenced by the factor to cause the broken ends of the spun yarn; when a plurality of factors act together, the association coefficients are sorted to obtain the factor with the largest influence and the factor is processed. Assume that the correlation order is x₁>x₂>x₃>x₄>x₅>x₆>x₇>x₈At this time, take x₁、x₂、x₃And x₄As a main factor causing the yarn breakage.

the grey correlation degree analysis method is a multi-factor statistical analysis method, which uses the sample data of each factor as the basis to describe the strength, the size and the sequence of the relationship between the factors by using the grey correlation degree, and if the sample data reflects that the changing situations (the direction, the size, the speed and the like) of the two factors are basically consistent, the correlation degree between the two factors is larger; otherwise, the degree of association is small. The grey correlation method is used for analyzing the yarn broken end factors, the requirements on data can be reduced under the condition that the data is less in a short time when the yarn broken ends occur, the loss caused by data asymmetry is reduced, the yarn broken end factors can be quickly positioned, the result is matched with the qualitative analysis result, and a good positioning effect is achieved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.