Material loss measurement and control method and system in cable extrusion process

Abstract

The application discloses a kind of material loss measurement and control method and system in cable extrusion process, it is related to industrial automation control technical field.Therein, method includes: obtaining the material extrusion amount of current extruder and the outer diameter data of production cable, wherein, material extrusion amount is obtained based on high-precision high-speed weighing device, and outer diameter data is measured by diameter gauge in real time;Based on material extrusion amount and outer diameter data, the actual material loss value of current is calculated;Based on actual material loss value and outer diameter data, the screw rotation speed of extruder and the traction speed of traction machine traction cable are adjusted, so that actual material loss value and outer diameter data are respectively in corresponding set range.In this way, by introducing high-precision measuring device and adaptive algorithm, the problem that material extrusion amount and cable traction speed proportion are not constant caused by relying on manual experience in the prior art is solved, the control precision, stability and product quality of production process are significantly improved, and production cost and product quality risk are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial automation control, and particularly relates to a material loss measurement and control method and system in a cable extrusion process. BACKGROUND

[0002] With the acceleration of global industrialization, the cable industry, as the foundation of modern industry, is developing rapidly. Cables are widely used in power transmission, communication, automobile manufacturing, construction and other fields, and the market demand continues to grow. Under such industry background, cable production enterprises are facing fierce market competition. How to reduce production costs while ensuring product quality has become the key to the survival and development of enterprises.

[0003] In the existing cable production technology, the control of material loss is an important link. The traditional production method mainly relies on manual experience and the stability of equipment to control material loss. Operators accumulate experience through long-term practice, and adjust the production equipment according to personal skills and judgment to reduce material waste. At the same time, enterprises will regularly maintain and maintain the production equipment to ensure the normal operation of the equipment, thereby indirectly controlling the material loss.

[0004] However, the existing technical solution relies heavily on manual experience, and the skill level and experience of different operators differ, which leads to inconsistent ratio of material extrusion amount to cable pulling speed, thereby causing unstable outer diameter or wall thickness and increasing product quality risk. SUMMARY

[0005] Therefore, the present application provides a material loss measurement and control method and system in a cable extrusion process to solve the problem of unstable cable outer diameter or wall thickness caused by the existing technical solution relying heavily on manual experience.

[0006] In one aspect, the present application provides a material loss measurement and control method in a cable extrusion process, comprising: obtaining the material extrusion amount of the current extruder and the outer diameter data of the produced cable, wherein the material extrusion amount is obtained based on a high-precision high-speed weighing device, and the outer diameter data is measured by a diameter measuring instrument in real time; based on the material extrusion amount and the outer diameter data, calculating the actual material loss value; based on the actual material loss value and the outer diameter data, adjusting the screw speed of the extruder and the pulling speed of the pulling machine to pull the cable, so that the actual material loss value and the outer diameter data are respectively within the corresponding set range.

[0007] In one aspect, the embodiments of the present application provide a material loss measurement and control system in a cable extrusion process, comprising: a controller, a high-precision high-speed weighing device, and a diameter measuring instrument; the high-precision high-speed weighing device is used to detect the material extrusion amount of the current extruder; the diameter measuring instrument is used to detect the outer diameter data of the current production cable; the controller is used to obtain the material extrusion amount of the current extruder and the outer diameter data of the production cable; based on the material extrusion amount and the outer diameter data, the actual material loss value is calculated; based on the actual material loss value and the outer diameter data, the screw speed of the extruder and the traction speed of the traction machine are adjusted to make the actual material loss value and the outer diameter data respectively within the corresponding set range.

[0008] In a possible embodiment, the system further comprises a display terminal; the display terminal is used to display the material extrusion amount, the extrusion rate corresponding to the material extrusion amount, and the measurement data of the diameter measuring instrument, and display the actual material loss value calculated by the controller.

[0009] In a possible embodiment, the controller is used to: based on the high-precision high-speed weighing device, measure the current material loss amount of the extruder; wherein the high-precision high-speed weighing device is installed at the feeding port of the extruder; take the difference between the material loss amount and the last collected material loss amount as the material extrusion amount; and based on the diameter measuring instrument, measure the outer diameter data; wherein the diameter measuring instrument is installed at the outlet of the extruder.

[0010] In a possible embodiment, the controller is used to: based on the outer diameter data, calculate the cross-sectional area of the protective layer of the cable; wherein the protective layer is composed of material; based on the cross-sectional area and the density of the protective layer, calculate the length of the cable; based on the material extrusion amount and the length, calculate the actual material loss value.

[0011] In a possible embodiment, the controller is used to: based on the first adaptive control algorithm, adjust the screw speed and the traction speed according to the first deviation between the actual material loss value and the set material loss value, so that the actual material loss value is within the set material loss range; wherein the adaptive parameters of the first adaptive control algorithm are associated with the first deviation; based on the second adaptive control algorithm, adjust the screw speed and the traction speed according to the second deviation between the outer diameter data and the set outer diameter, so that the outer diameter data is within the set outer diameter range, wherein the adaptive parameters of the second adaptive control algorithm are associated with the second deviation.

[0012] In a possible embodiment, the controller is configured to: based on the first deviation, determine a proportional term, an integral term, and a differential term of the first adaptive control algorithm, including: based on a product of the first deviation and a proportional gain, obtaining the proportional term; multiplying a sum of the first deviation and a historical accumulated deviation by an integral gain, to obtain the integral term; determining a material loss deviation change rate based on the first deviation, and multiplying the material loss deviation change rate by a differential gain, to obtain the differential term; and adjusting the screw rotation speed and the traction speed respectively according to a sum of the proportional term, the integral term, and the differential term.

[0013] In a possible embodiment, the controller is further configured to: calculate an extrusion rate corresponding to the material extrusion amount; the extrusion rate represents the material extrusion amount per rotation of the screw; based on the extrusion rate, obtain an extrusion rate change trend in a preset time period; and based on the extrusion rate change trend, determine whether the screw needs to be maintained, or based on the extrusion rate change trend, determine whether the quality of the material changes.

[0014] The application has the following advantages: the material loss measurement and control method and system in the cable extrusion process provided by the embodiments of the application measure the material extrusion amount and the cable outer diameter in real time through a high-precision high-speed weighing device and a diameter measuring instrument, provide accurate data basis, and control based on these basis data, avoiding the subjectivity and instability of manual experience, and significantly improving the control accuracy. In addition, the screw rotation speed and the traction speed are dynamically adjusted based on these basis data, to ensure that the proportion of the material extrusion amount and the cable traction speed is constant. This dynamic adjustment capability enables the system to quickly respond to fluctuations in the production process, maintain the stability of the cable outer diameter and wall thickness, and reduce the product quality risk. At the same time, by accurately controlling the material loss and the cable outer diameter, the problem of unstable outer diameter or wall thickness caused by the non-constant proportion is reduced, the consistency and reliability of the product quality are improved, and the rework and scrap rate caused by quality problems are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the application or the related art, the following will briefly introduce the drawings needed to be used in the embodiment or related art description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0016] Figure 1 The flowchart of the material loss measurement and control method in the cable extrusion process in the embodiments of the application is shown in the figure.

[0017] Figure 2 The schematic diagram of the material loss measurement and control system in the cable extrusion process in the embodiments of the application is shown in the figure. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application. The embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily without conflict. And, although a logical order is shown in the flowchart, in some cases, the steps shown or described can be performed in an order different from that here.

[0019] The terms "first", "second", and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein.

[0020] The design idea of the embodiments of the present application will be briefly introduced as follows: In the existing cable production technology, the control of material loss is an important link. The traditional production method mainly relies on manual experience and the stability of the equipment to control the material loss. The operator accumulates experience through long-term practice, adjusts the production equipment according to personal skills and judgment, in order to achieve the purpose of reducing material waste. At the same time, the enterprise will also regularly maintain and maintain the production equipment to ensure the normal operation of the equipment, thereby indirectly controlling the material loss. However, the existing technical solution relies heavily on manual experience, and there are differences in skill level and experience among different operators, which leads to the fact that the proportion of the extrusion amount of the material and the pulling speed of the cable is not constant, thereby causing the outer diameter or wall thickness to be unstable, increasing the risk of product quality.

[0021] Therefore, the embodiments of the present application provide a material loss measurement and control method and system in a cable extrusion process, wherein the method comprises: obtaining the material extrusion amount of the current extruder and the outer diameter data of the produced cable, wherein the material extrusion amount is obtained based on a high-precision high-speed weighing device, and the outer diameter data is measured by a diameter measuring instrument in real time; based on the material extrusion amount and the outer diameter data, calculating the actual material loss value; based on the actual material loss value and the outer diameter data, adjusting the screw speed of the extruder and the pulling speed of the traction machine to pull the cable, so that the actual material loss value and the outer diameter data are respectively within the corresponding set range. In this way, the technical solution introduces a high-precision measuring device and an adaptive algorithm, solves the problem that the proportion of the material extrusion amount and the cable pulling speed is not constant due to the reliance on manual experience in the prior art, significantly improves the control accuracy, stability and product quality of the production process, reduces the production cost and product quality risk, and has significant technical effects and application value.

[0022] The preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to explain and illustrate the present application, and are not used to limit the present application, and the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0023] Reference Figure 1 An implementation flowchart of a material loss measurement and control method in a cable extrusion process is provided for the embodiments of the present application. The specific implementation flow of the method is as follows: S101, obtaining material extrusion amount of the current extruder and outer diameter data of the produced cable, wherein the material extrusion amount is obtained based on a high-precision high-speed weighing device, and the outer diameter data is measured by a diameter measuring instrument in real time.

[0024] In the embodiments of the present application, the extruder heats the solid material such as plastic, rubber, etc. to a molten state through heating and shearing action, so that it has good fluidity and plasticity. Then, the molten material is uniformly extruded by the rotation of the screw to form a cable protective layer. The extruded material needs to maintain a certain thickness and uniformity to ensure the electrical and mechanical properties of the cable. During the extrusion of the material by the extruder, the speed of the traction machine pulling the cable needs to match the material extrusion rate to make the outer diameter data of the generated cable uniform.

[0025] In the embodiments of the present application, in order to obtain accurate basic data such as material extrusion amount and outer diameter data of the produced cable, the specific acquisition method includes: based on a high-precision high-speed weighing device, measuring the current material loss amount of the extruder; wherein the high-precision high-speed weighing device is installed at the feeding port of the extruder; taking the difference between the material loss amount and the last collected material loss amount as the material extrusion amount; and based on a diameter measuring instrument, measuring the outer diameter data; wherein the diameter measuring instrument is installed at the outlet of the extruder, and when the material wraps the cable core to form a protective layer, the diameter measuring instrument can directly measure the outer diameter of the cable when the cable is formed.

[0026] By measuring the material extrusion amount and the cable outer diameter in real time through the high-precision high-speed weighing device and the diameter measuring instrument, accurate data basis is provided, and subsequent control is based on these basic data, avoiding the subjectivity and instability of manual experience, and significantly improving the control accuracy.

[0027] S102, based on the material extrusion amount and the outer diameter data, calculating the current actual material loss value.

[0028] In the embodiment of the present application, in order to match the speed of the traction machine pulling the cable with the material extrusion rate, and to make the final generated cable outer diameter meet the set specification, it is necessary to control the actual material loss value in the cable production process, and prevent the deviation between the actual material loss value and the set material loss value from being too large. The calculation method of the actual material loss value is as follows:

[0029] Firstly, based on the outer diameter data, the cross-sectional area of the protective layer of the cable is calculated, wherein the protective layer is composed of material, and if the outer diameter data of the cable is measured in real time by a diameter measuring instrument H , the inner diameter data of the core corresponding to the cable specification is h , and the cross-sectional area of the protective layer A can be calculated by the following formula: In formula (1), π is the circular constant, which is approximately equal to 3.14159.

[0030] Then, based on the cross-sectional area of the protective layer and the density of the protective layer, the length of the cable is calculated. Specifically, if the density of the protective layer is p , then the length of the cable L can be calculated by the following formula: In formula (2), Q is the material extrusion amount of the extruder.

[0031] Finally, based on the material extrusion amount and the length, the actual material loss value is calculated. Specifically, the actual material loss value M loss can be calculated by the following formula: By the above method, the actual material loss value of the cable under the current outer diameter data and the material extrusion amount can be calculated, which provides a reference and basis for subsequent material loss control.

[0032] S103, based on the actual material loss value and the outer diameter data, adjusting the screw speed of the extruder and the traction speed of the traction machine pulling the cable, so that the actual material loss value and the outer diameter data are respectively within the corresponding set range.

[0033] In the embodiment of the present application, after the actual material loss value of the cable is calculated, further, based on the actual material loss value and the outer diameter data, adjusting the screw speed of the extruder and the traction speed of the traction machine pulling the cable, including: based on the first adaptive control algorithm, adjusting the screw speed and the traction speed according to the first deviation between the actual material loss value and the set material loss value, so that the actual material loss value is within the set material loss range; wherein the adaptive parameters of the first adaptive control algorithm are associated with the first deviation.

[0034] Specifically, first, based on the first deviation, the proportional term, the integral term and the differential term of the first adaptive control algorithm are determined, which specifically includes: first, based on the product of the first deviation and the proportional gain, the proportional term is obtained, and the specific calculation formula is as follows: ; In formula (4), ∆ M is the current first deviation, K p is the proportional gain, P is a proportional term.

[0035] Then, the sum of the current first deviation and the historical accumulated deviation is multiplied by the integral gain to obtain the integral term. The specific calculation formula is as follows: ; In formula (5), I is the integral term, K i is the integral gain, t is the number of historical calculations of the first deviation, i is the number of times the history of the first deviation is obtained.

[0036] Next, the material loss deviation change rate is determined based on the first deviation, and the material loss deviation change rate is multiplied by the differential gain to obtain the differential term. The specific calculation formula is as follows: ; In formula (6), D is the differential term, K d is the differential gain, ∆ M p is the first deviation obtained last time, ∆ T is the time interval between two deviations.

[0037] Further, find the sum of the proportional term, integral term, and differential term u ( t ), the specific calculation formula is as follows: .

[0038] Further, according to the total u ( t ), respectively adjust the screw speed and traction speed, the specific adjustment formula is: ; In formula (8), w screw is the screw speed, w screw,0 is the initial screw speed.

[0039] In formula (9), V towing is the traction speed, V towing,0 is the initial pulling speed.

[0040] Through the first adaptive control algorithm, real-time control of material loss can be achieved. The first adaptive control algorithm can quickly respond to dynamic changes in the production process by adjusting the control parameters in real time, ensuring real-time control. The control parameters of the traditional PID algorithm are fixed and cannot be adjusted in real time, so the response to dynamic changes is slow. Second, the first adaptive control algorithm can better adapt to different production conditions and material characteristics by dynamically adjusting the control parameters, improving the reliability and stability of the control. The control parameters of the traditional PID algorithm are fixed, and the adaptability to changes in production conditions and material characteristics is poor, which can easily lead to unstable control. In addition, the first adaptive control algorithm can achieve more accurate control by adjusting the control parameters in real time, reducing overshoot and steady-state error. The control accuracy of the traditional PID algorithm is limited by fixed parameters, and overshoot and steady-state error can easily occur.

[0041] In one embodiment, based on the actual material loss value and the outer diameter data, the screw speed of the extruder and the traction speed of the traction cable of the traction machine are adjusted, and the method further comprises: based on a second adaptive control algorithm, adjusting the screw speed and the traction speed according to a second deviation between the outer diameter data and the set outer diameter, so that the outer diameter data is within the range of the set outer diameter, wherein the adaptive parameters of the second adaptive control algorithm are associated with the second deviation.

[0042] The implementation process of the second adaptive control algorithm can refer to the first adaptive control algorithm, and the principle is the same, except that the dynamic control parameters of the second adaptive control algorithm are based on the second deviation between the outer diameter data and the set outer diameter, while the dynamic control parameters of the first adaptive control algorithm are based on the first deviation between the actual material loss value and the set material loss value. Therefore, the implementation process of the second control algorithm is not described here, and the technical effects of its implementation can refer to the technical effects of the first control algorithm described above. The corresponding calculation formula only needs to replace the adaptability between the second deviation and the first deviation.

[0043] In one embodiment, the extrusion rate corresponding to the material extrusion amount can also be calculated, which represents the material extrusion amount per revolution of the screw. Then, the extrusion rate change trend in the preset time period is obtained based on the extrusion rate. Further, based on the extrusion rate change trend, it is determined whether the screw needs to be maintained, or based on the extrusion rate change trend, it is determined whether the quality of the material has changed.

[0044] In this embodiment, the size of the extrusion rate reflects the extrusion capacity of the extruder, and the fluctuation of the extrusion rate reflects the fluctuation of the outer diameter data of the cable in the production process. Therefore, the change trend in the long-term working process of the extrusion rate and the fluctuation in the speed-up and speed-down process can be used as quantitative data for maintenance of the device screw and barrel. At the same time, for different materials, the fluctuation of the extrusion rate will change, and thus the quality of the material can be quantitatively judged.

[0045] In summary, the embodiment of the present application provides a material loss measurement and control method and system in a cable extrusion process. By introducing a high-precision measuring device and an adaptive algorithm, the problem of inconsistent proportion of material extrusion amount and cable pulling speed caused by relying on manual experience in the prior art is solved, the control accuracy, stability and product quality of the production process are significantly improved, the production cost and product quality risk are reduced, and the method has significant technical effects and application value.

[0046] In addition, the technical scheme not only performs double closed-loop control from two aspects of actual material loss value and outer diameter data, can realize real-time control of material loss, but also adjusts control parameters in real time through the first adaptive control algorithm and the second adaptive control algorithm, so that the material loss control can quickly respond to dynamic changes in the production process. Compared with the fixed control parameters of the traditional PID algorithm, the response speed of this method to dynamic changes is faster, which can better adapt to different production conditions and material characteristics, improve the reliability and stability of control, realize more accurate control, and reduce overshoot and steady-state error.

[0047] Based on the same inventive concept, the embodiment of the present application also provides a material loss measurement and control system in a cable extrusion process. As shown in Figure 2 The material loss measurement and control system 200 in the cable extrusion process can include a controller 201, a high-precision high-speed weighing device 202, and a diameter measuring instrument 203. The high-precision high-speed weighing device 202 is used to detect the material extrusion amount of the current extruder. The diameter measuring instrument 203 is used to detect the outer diameter data of the current production cable. The controller 201 is used to obtain the material extrusion amount of the current extruder and the outer diameter data of the production cable. Based on the material extrusion amount and the outer diameter data, the actual material loss value is calculated. Based on the actual material loss value and the outer diameter data, the screw speed of the extruder and the pulling speed of the traction machine for pulling the cable are adjusted, so that the actual material loss value and the outer diameter data are respectively within the corresponding set range.

[0048] In a possible embodiment, the system further includes a display terminal. The display terminal is used to display the material extrusion amount, the extrusion rate corresponding to the material extrusion amount, and the measurement data of the diameter measuring instrument 203, and display the actual material loss value calculated by the controller.

[0049] In this embodiment, the user can also set the corresponding "high line speed" and "low line speed" two production modes based on the display terminal according to the production specification, and set the corresponding "target outer diameter value" according to the process requirements of the cable. During the production process, the production line can be switched between "high line speed" and "low line speed" two production states according to the actual situation of the production process, and the controller can ensure the stability of the whole process line diameter control. In addition, the display terminal can also display the pulling speed, screw speed, extrusion amount, extrusion rate, material loss value, outer diameter value and other parameters concerned by the user.

[0050] In one possible embodiment, the controller 201 is configured to: measure the material loss amount of the extruder based on the high-precision high-speed weighing device 202; the high-precision high-speed weighing device 202 is installed at the feeding port of the extruder; take the difference between the material loss amount and the last collected material loss amount as the material extrusion amount; and measure the outer diameter data based on the diameter measuring instrument 203; the diameter measuring instrument 203 is installed at the outlet of the extruder.

[0051] In one possible embodiment, the controller 201 is configured to: calculate the cross-sectional area of the protective layer of the cable based on the outer diameter data; the protective layer is composed of material; calculate the length of the cable based on the cross-sectional area and the density of the protective layer; and calculate the actual material loss value based on the material extrusion amount and the length.

[0052] In one possible embodiment, the controller 201 is configured to: adjust the screw speed and the pulling speed based on the first adaptive control algorithm according to the first deviation between the actual material loss value and the set material loss value, so that the actual material loss value is within the set material loss range; the adaptive parameters of the first adaptive control algorithm are associated with the first deviation; and adjust the screw speed and the pulling speed based on the second adaptive control algorithm according to the second deviation between the outer diameter data and the set outer diameter, so that the outer diameter data is within the set outer diameter range; the adaptive parameters of the second adaptive control algorithm are associated with the second deviation.

[0053] In one possible embodiment, the controller 201 is configured to: determine the proportional term, the integral term and the differential term of the first adaptive control algorithm based on the first deviation, including: obtaining the proportional term based on the product of the first deviation and the proportional gain; multiplying the sum of the first deviation and the historical cumulative deviation by the integral gain to obtain the integral term; determining the material loss deviation change rate based on the first deviation, and multiplying the material loss deviation change rate by the differential gain to obtain the differential term; and adjusting the screw speed and the pulling speed according to the sum of the proportional term, the integral term and the differential term.

[0054] In a possible implementation, the controller 201 is further configured to: calculate an extrusion rate corresponding to the material extrusion amount; the extrusion rate represents the material extrusion amount per rotation of the screw; based on the extrusion rate, obtain a change trend of the extrusion rate in a preset time period; based on the change trend of the extrusion rate, determine whether the screw needs to be maintained, or, based on the change trend of the extrusion rate, determine whether the quality of the material changes.

[0055] In some possible implementation, the material loss control system in a cable extrusion process according to the present application can at least include a processor and a memory. The memory stores program codes which, when executed by the processor, cause the processor to perform the steps of the material loss control method in a cable extrusion process according to various exemplary embodiments of the present application described in the specification. For example, the processor can perform the steps as shown in Figure 1 .

[0056] In some possible implementation, various aspects of the material loss control method in a cable extrusion process provided by the present application can also be implemented in the form of a program product, which includes program codes for causing the control device to perform the steps of the material loss control method in a cable extrusion process according to various exemplary embodiments of the present application described above in the specification when the program product is running on the device.

[0057] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage devices, etc.) containing computer-usable program codes.

[0058] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A method for measuring and controlling material loss in a cable extrusion process, characterized in that, The method comprises the following steps: obtaining the material extrusion amount of the current extruder and the outer diameter data of the production line cable, wherein the material extrusion amount is obtained based on a high-precision high-speed weighing device, and the outer diameter data is measured in real time by a diameter measuring instrument; calculating the current actual material loss value based on the material extrusion amount and the outer diameter data; adjusting the screw rotation speed and the traction speed based on a first adaptive control algorithm according to a first deviation between the actual material loss value and a set material loss value, including: obtaining a proportional term of the first adaptive control algorithm based on the product of the first deviation and a proportional gain; multiplying the sum of the first deviation and a historical cumulative deviation by an integral gain to obtain an integral term of the first adaptive control algorithm; determining a material loss deviation change rate based on the first deviation and multiplying the material loss deviation change rate by a differential gain to obtain a differential term of the first adaptive control algorithm; adjusting the screw rotation speed and the traction speed respectively according to the sum of the proportional term, the integral term and the differential term, so that the actual material loss value is within the set material loss range; wherein the adaptive parameters of the first adaptive control algorithm are associated with the first deviation; adjusting the screw rotation speed and the traction speed based on a second adaptive control algorithm according to a second deviation between the outer diameter data and a set outer diameter, so that the outer diameter data is within the set outer diameter range, wherein the adaptive parameters of the second adaptive control algorithm are associated with the second deviation; wherein the calculation of the current actual material loss value based on the material extrusion amount and the outer diameter data comprises: calculating the cross-sectional area of the protective layer of the cable based on the outer diameter data; wherein the protective layer is composed of the material; calculating the length of the cable based on the cross-sectional area and the density of the protective layer; calculating the actual material loss value based on the material extrusion amount and the length.

2. The method of claim 1, wherein, The method comprises the following steps: measuring the current material loss amount of the extruder based on the high-precision high-speed weighing device; wherein the high-precision high-speed weighing device is installed at the feeding port of the extruder; taking the difference between the material loss amount and the material loss amount collected last time as the material extrusion amount; and measuring the outer diameter data based on the diameter measuring instrument; wherein the diameter measuring instrument is installed at the outlet of the extruder.

3. The method of claim 1, wherein, Further comprising: calculating the extrusion rate corresponding to the material extrusion amount; the extrusion rate represents the material extrusion amount per revolution of the screw; based on the extrusion rate, obtaining the extrusion rate change trend in a preset time period; based on the extrusion rate change trend, determining whether the screw needs to be maintained, or based on the extrusion rate change trend, determining whether the quality of the material has changed.

4. A material loss monitoring system in a cable extrusion process, characterized by, Comprise: a controller, a high-precision high-speed weighing device and a diameter measuring instrument; the high-precision high-speed weighing device is used to detect the material extrusion amount of the current extruder; the diameter measuring instrument is used to detect the outer diameter data of the current production line cable; The controller is configured to acquire material extrusion amount of the current extruder and outer diameter data of the production line cable, and calculate a current actual material loss value based on the material extrusion amount and the outer diameter data; Based on a first adaptive control algorithm, the screw rotation speed and the traction speed are adjusted according to a first deviation between the actual material loss value and a set material loss value, including: a proportional term of the first adaptive control algorithm is obtained based on a product of the first deviation and a proportional gain; a sum of the first deviation and a historical cumulative deviation is multiplied by an integral gain to obtain an integral term of the first adaptive control algorithm; a material loss deviation change rate is determined based on the first deviation, and the material loss deviation change rate is multiplied by a differential gain to obtain a differential term of the first adaptive control algorithm; the screw rotation speed and the traction speed are adjusted according to a sum of the proportional term, the integral term and the differential term, so that the actual material loss value is within a set material loss range; wherein adaptive parameters of the first adaptive control algorithm are associated with the first deviation; based on a second adaptive control algorithm, the screw rotation speed and the traction speed are adjusted according to a second deviation between the outer diameter data and a set outer diameter, so that the outer diameter data is within a set outer diameter range, wherein adaptive parameters of the second adaptive control algorithm are associated with the second deviation; The controller is configured to: Based on the outer diameter data, the cross-sectional area of the protective layer of the cable is calculated; wherein the protective layer is composed of the material; Based on the cross-sectional area and the density of the protective layer, the length of the cable is calculated; Based on the material extrusion amount and the length, the actual material loss value is calculated.

5. The system of claim 4, wherein, Further comprising a display terminal; The display terminal is configured to display the material extrusion amount, an extrusion rate corresponding to the material extrusion amount, and measurement data of a diameter measuring instrument, and display the actual material loss value calculated by the controller.

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