Real-time monitoring system and method for fiber forming process

Abstract

The invention discloses a real-time monitoring system and method for a fiber forming process, and belongs to the technical field of fiber production. The system comprises a platform base; the platform base is fixedly connected with a displacement device; the displacement device comprises a vertical slide rail and a horizontal slide rail which are vertically connected with each other; the horizontal slide rail can move up and down along the vertical slide rail; a laser diameter measuring instrument, a high-speed camera, a speed measuring instrument and an infrared thermal imager are installed on the horizontal sliding rail. And the laser diameter measuring instrument, the high-speed camera, the speed measuring instrument and the infrared thermal imager are electrically connected with the computer. According to the method, various parameters of more fiber forming processes can be monitored in real time in a larger spatial scale, and the curing process from a high polymer melt to nascent fibers is analyzed more comprehensively, so that the fiber production process is optimized, and the fiber performance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fiber production, and relates to a real-time monitoring system and method for a fiber forming process. Background Art

[0002] The production of primary fiber is the core of the melt spinning process, which directly determines the structure and performance of the final fiber. The specific process is that the polymer is first heated and melted in the screw extruder, and then driven by the rotating screw to the spinning metering pump, and then pressurized and quantitatively fed into the spinning assembly by the metering pump, and extruded from the capillary holes of the spinneret at the end of the spinning assembly. The extruded liquid polymer melt is solidified by heat exchange with the cooling medium determined by the process conditions, and is drawn into filaments by the high-speed winding device located below the spinneret hole to form primary fiber.

[0003] During the fiber forming process, the flow rate, temperature and other parameters of the cooling fluid will directly determine the heat and mass transfer characteristics of the melt surface interface and the internal solidification interface, and then determine the radial temperature and stress distribution of the melt, which in turn affects the orientation and crystallization process, and ultimately determines the performance of the nascent fiber; during the melt coagulation and solidification process, excessively high or low radial temperature gradients will destroy the fiber structure and impair the mechanical properties of the fiber. Therefore, real-time acquisition of working parameters such as fiber diameter and surface temperature during the fiber forming process is of great significance to fiber production.

[0004] At present, most of them only conduct characterization observations on finished fibers. This technology tests the various properties of spun finished fibers, and then reversely infers the influence of various production parameters on the fibers during the spinning process. It is the mainstream form of melt-spun fiber performance research. However, the extrusion and solidification process of melt spinning is very complicated, and there are many factors that affect the performance parameters of finished fibers. It is difficult to reverse the spinning process only through the performance of finished fibers.

[0005] The heat and mass transfer between the polymer melt and the cooling medium affects the entire process of fiber forming, involving a large spatial scale from the spinneret to the winding roller. The values ​​of various fiber parameters monitored at different fiber axial positions will be quite different. Therefore, in order to comprehensively analyze the impact of the cooling medium on the entire solidification process, it is urgent to develop a melt spinning research system that can move in multiple directions and monitor the fiber forming process in real time. Summary of the invention

[0006] The purpose of the present invention is to provide a real-time monitoring system and method for a fiber forming process, so as to solve the technical problem in the prior art that it is difficult to obtain relevant parameters in the fiber curing process, thereby affecting the subsequent optimization of the fiber production process.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides a real-time monitoring system for a fiber forming process, comprising a platform base; a displacement device is fixedly connected to the platform base; the displacement device comprises a vertical slide rail and a horizontal slide rail vertically connected to each other; the horizontal slide rail can move up and down along the vertical slide rail; a laser diameter gauge, a high-speed camera, a speed meter and an infrared thermal imager are installed on the horizontal slide rail; the laser diameter gauge, the high-speed camera, the speed meter and the infrared thermal imager are electrically connected to a computer.

[0008] Furthermore, a horizontal carrying slider and a connecting piece are installed on the horizontal slide rail; a high-speed camera and an infrared thermal imager are fixedly connected to the horizontal carrying slider, and the horizontal carrying slider can drive the high-speed camera and the infrared thermal imager to slide on the horizontal slide rail; the connecting piece is located at one end of the horizontal slide rail, and the connecting piece is used to fix the laser diameter meter and the speed meter on the horizontal slide rail.

[0009] Furthermore, the connecting piece has a plurality of threaded holes for threadedly connecting the laser diameter meter and the speed meter.

[0010] Furthermore, the fixed connection between the horizontal carrying sliding block and the high-speed camera and the infrared thermal imager is a threaded connection.

[0011] Furthermore, an adapter plate is fixed on the platform base; the adapter plate is a right-angled triangle structure, and two right-angled sides of the adapter plate are respectively connected to the upper surface of the platform base and the vertical slide rail.

[0012] Furthermore, the adapter plate is connected to the platform base and the vertical slide rail respectively by welding or threaded connection.

[0013] Furthermore, the laser diameter meter and the speed meter are electrically connected to the computer via a data acquisition device.

[0014] Furthermore, the platform base is a damping vibration isolation optical platform.

[0015] Furthermore, the velocimeter is a Doppler velocimeter.

[0016] In a second aspect, the present invention provides a real-time monitoring method for a fiber forming process, based on the above-mentioned real-time monitoring system for a fiber forming process, comprising the following steps: Turn on the fiber production equipment, and after the silk production is stable, adjust the vertical and horizontal slides to the preset position of the fiber to be tested. After collecting the data, adjust the vertical and horizontal slides to collect data at other locations. After all data collection is completed, turn off the fiber production equipment, move the horizontal slide to the lowest point, remove the laser diameter measurer, high-speed camera, speed meter and infrared thermal imager, and turn off the power.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a real-time monitoring system and method for a fiber forming process. The introduction of a displacement device, especially the vertical connection design of a vertical slide rail and a horizontal slide rail, enables key monitoring equipment such as a laser diameter gauge, a high-speed camera, a velocimeter and an infrared thermal imager to move freely in a three-dimensional space, thereby realizing all-round, multi-angle real-time monitoring of the fiber forming process. The laser diameter gauge can accurately measure the diameter of the fiber to ensure the consistency and stability of product quality; the high-speed camera can capture the detailed changes in the fiber forming process and provide researchers with intuitive and clear image data; the velocimeter can monitor the movement speed of the fiber in real time to help control the production rhythm and efficiency; the infrared thermal imager can detect the temperature changes in the fiber forming process and provide an important reference for temperature control. In addition, the electrical connection between these monitoring devices and the computer enables the collected data to be transmitted, stored and analyzed in real time, further improving the automation and intelligence level of monitoring. This not only reduces the labor intensity of manual monitoring, but also improves the accuracy and reliability of monitoring data, providing strong technical support for the optimization and improvement of the fiber forming process. Compared with general measuring devices, the present invention can monitor more parameters of the fiber forming process in real time within a larger spatial scale, and more comprehensively analyze the solidification process from polymer melt to nascent fiber, thereby optimizing the fiber production process and improving fiber performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the system detection principle of the present invention; Figure 2 It is a front view of the system of the present invention; Figure 3 is a side view of the system of the present invention; Figure 4 It is a schematic diagram of the structure of the horizontal slide rail of the system of the present invention.

[0020] Among them: 101-platform base; 102-displacement device; 103-adapter plate; 104-vertical slide rail; 105-horizontal slide rail; 106-horizontal carrying slider; 107-connector; 2-laser diameter gauge; 201-receiver; 202-transmitter; 3-high-speed camera; 4-speed meter; 5-infrared thermal imager; 6-data acquisition instrument; 7-computer; 8-spinneret micropores; 9-fiber to be tested; 10-cooling and blowing device; 11-channel. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 1 The embodiment of the present invention discloses a real-time monitoring system for a fiber forming process, comprising a platform base 101; a displacement device 102 is fixedly connected to the platform base 101; the displacement device 102 comprises a vertical slide rail 104 and a horizontal slide rail 105 which are vertically connected to each other; the horizontal slide rail 105 can move up and down along the vertical slide rail 104; a laser diameter gauge 2, a high-speed camera 3, a velocimeter 4 and an infrared thermal imager 5 are installed on the horizontal slide rail 105; the laser diameter gauge 2, the high-speed camera 3, the velocimeter 4 and the infrared thermal imager 5 are electrically connected to a computer. The introduction of the displacement device 102, especially the vertical connection design of the vertical slide rail 104 and the horizontal slide rail 105, enables key monitoring equipment such as the laser diameter gauge 2, the high-speed camera 3, the velocimeter 4 and the infrared thermal imager 5 to move freely in a three-dimensional space, thereby realizing all-round and multi-angle real-time monitoring of the fiber forming process.

[0028] In a feasible embodiment of the present invention, a horizontal carrying slider 106 and a connecting member 107 are installed on the horizontal slide rail 105; the high-speed camera 3 and the infrared thermal imager 5 are fixedly connected to the horizontal carrying slider 106, and the horizontal carrying slider 106 can drive the high-speed camera 3 and the infrared thermal imager 5 to slide on the horizontal slide rail 105; the connecting member 107 is located at one end of the horizontal slide rail 105, and the connecting member 107 is used to fix the laser diameter meter 2 and the speed meter 4 on the horizontal slide rail 105.

[0029] In a feasible embodiment of the present invention, the connecting member 107 has a plurality of threaded holes for threadedly connecting the laser diameter meter 2 and the speed meter 4. The fixed connection between the horizontal carrying slider 106 and the high-speed camera 3 and the infrared thermal imager 5 is threaded connection.

[0030] In a feasible embodiment of the present invention, an adapter plate 103 is further fixed to the platform base 101; the adapter plate 103 is a right-angled triangle structure, and the two right-angled sides of the adapter plate 103 are respectively connected to the upper surface of the platform base 101 and the vertical slide rail 104. The adapter plate 103 further improves the stability of the structure, and the connection between the adapter plate 103 and the platform base 101 and the vertical slide rail 104 is welding or threaded connection.

[0031] In a feasible embodiment of the present invention, the laser diameter meter 2 and the velocimeter 4 are electrically connected to the computer 7 via the data acquisition device 6. The platform base 101 preferably adopts a damping vibration isolation optical platform. The damping vibration isolation optical platform can effectively absorb and eliminate vibration interference from the environment, such as mechanical vibration, earthquake, etc., and provide a stable working environment. The velocimeter 4 preferably adopts a Doppler velocimeter.

[0032] The embodiment of the present invention discloses a real-time monitoring method for a fiber forming process. Based on the above-mentioned real-time monitoring system for a fiber forming process, the method comprises the following steps: Turn on the fiber production equipment, and after the silk production is stable, adjust the vertical slide rail 104 and the horizontal slide rail 105 to the preset position of the fiber to be tested, and after collecting the data, adjust the vertical slide rail 104 and the horizontal slide rail 105 to collect data at other locations; after all data collection is completed, turn off the fiber production equipment, move the horizontal slide rail 105 to the lowest point, remove the laser diameter meter 2, the high-speed camera 3, the speed meter 4 and the infrared thermal imager 5, and turn off the power.

[0033] The working process of the present invention is as follows: After checking that all components are safe and normal, select the instrument to be installed on the horizontal track according to the parameters to be measured, connect the instrument data cable to the computer 7 or the acquisition card, turn on the dual-axis motion controller and the instrument power supply, and check whether the controller and the instrument are working properly. After the control is normal, turn on the fiber production equipment. After the silk production is stable, first move the system of the present invention to a suitable position, adjust the vertical and horizontal tracks, and ensure that all instruments are in the correct position; then lock the rollers of the damping and vibration isolation optical platform, and keep the displacement platform horizontal by rotating the screws on the support column of the displacement device. Set the instrument parameters according to the data requirements to be collected, fine-tune the horizontal carrying slider 106 to the appropriate position, and start real-time measurement. After collecting data at one place, the vertical slide rail can be adjusted to collect data at other sites in turn. After completing data collection, turn off the fiber production equipment, move the horizontal slide rail 105 to the lowest position, turn off the power of the instrument and controller, cut off all connecting lines, remove and clean all instruments, unlock the locking rollers of the damping and vibration isolation optical platform, move the multi-directional motion device to a safe position, and clean the table. Finally, turn off the computer.

[0034] Example: This embodiment provides a system for real-time monitoring of various parameters of a fiber forming process with multi-directional motion.

[0035] like Figure 2 and Figure 3 As shown, the device for real-time monitoring of various parameters of the fiber forming process in multi-directional motion consists of a damping vibration isolation optical platform, a displacement device 102 and an adapter plate 103. The damping vibration isolation optical platform has a size of 800*700*800 mm, has motion and horizontal adjustment functions, and has a 25*25 mm M6 threaded array hole on the upper surface. The displacement device 102 is welded on the customized adapter plate 103 and fixed on the damping vibration isolation optical platform by 15 M6 screws. The size of the customized adapter plate is 400*300*10 mm. The displacement device 102 includes a vertical slide rail 104 and a horizontal slide rail 105; the vertical motion range is 0-1.5 m.

[0036] In order to ensure the position adjustment of the measuring instrument and the horizontal position of the corridor, a horizontal slide rail 105 and a horizontal carrying slider 106 are installed on the vertical slide rail 104; the slider movement range is 0-0.3m, and both moving sliders are controlled by brake motors with a maximum movement speed of 10 mm / s. The brake motor is controlled by a dual-axis motion controller; Figure 4 As shown, the horizontal slide rail 105 includes two locations for installing instruments, namely the horizontal carrying slider 106 and the horizontal rail end connector 107; both locations have two rows of 25*25 mm M6 threaded array holes with 5 holes in each row for fixing instruments. The system includes a variety of real-time monitoring equipment, one type of which requires real-time horizontal position adjustment, including a high-speed camera 3 and an infrared thermal imager 5, fixed to the horizontal carrying slider 106; the other type does not require horizontal position adjustment or horizontal position fixation, including a laser diameter gauge 2 and a Doppler velocimeter, fixed to the end of the horizontal slide rail 105; all instruments can be selected according to experimental requirements, and the fixed equipment is fixed with the M6 ​​screws provided with the instrument. To ensure load safety, only one instrument is installed at each location, and the weight of each instrument does not exceed 5 kg. The dual-axis motion controller and all measuring instruments are directly or indirectly connected to a computer 7 through a data acquisition instrument 6 to realize the function of real-time monitoring of various parameters of the fiber forming process.

[0037] During use, the fiber is extruded from the spinneret micropores 8 at the end of the spinning assembly, enters the tunnel 11, and is cooled and solidified by the cooling blowing device 10. The transmitter 202 of the laser diameter gauge 2 of this embodiment is located at one end of the fiber 9 to be measured, and the receiver 201 of the laser diameter gauge 2 is located at the other end of the fiber 9 to be measured, so as to accurately measure the diameter of the fiber. The high-speed camera 3 can capture the detailed changes in the fiber forming process, providing researchers with intuitive and clear image data; the Doppler velocimeter can monitor the movement speed of the fiber in real time, helping to control the production rhythm and efficiency; the infrared thermal imager 5 can detect the temperature changes in the fiber forming process, providing an important reference for temperature control. The present invention integrates a variety of monitoring equipment into a multi-directional motion device, which is easy to control the measurement position of each monitoring equipment, and all measurement data are imported into the computer in real time. The computer also controls the movement of the lifting device, thereby monitoring various parameters of the fiber forming process in real time.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A real-time monitoring system for a fiber forming process, characterized in that: The invention comprises a platform base (101); a displacement device (102) is fixedly connected to the platform base (101); the displacement device (102) comprises a vertical slide rail (104) and a horizontal slide rail (105) which are vertically connected to each other; the horizontal slide rail (105) can move up and down along the vertical slide rail (104); a laser diameter gauge (2), a high-speed camera (3), a speed meter (4) and an infrared thermal imager (5) are installed on the horizontal slide rail (105); the laser diameter gauge (2), the high-speed camera (3), the speed meter (4) and the infrared thermal imager (5) are electrically connected to a computer.

2. A real-time monitoring system for fiber forming process according to claim 1, characterized in that: A horizontal carrying slider (106) and a connecting piece (107) are installed on the horizontal slide rail (105); a high-speed camera (3) and an infrared thermal imager (5) are fixedly connected to the horizontal carrying slider (106), and the horizontal carrying slider (106) can drive the high-speed camera (3) and the infrared thermal imager (5) to slide on the horizontal slide rail (105); the connecting piece (107) is located at one end of the horizontal slide rail (105), and the connecting piece (107) is used to fix the laser diameter meter (2) and the speed meter (4) on the horizontal slide rail (105).

3. A real-time monitoring system for fiber forming process according to claim 2, characterized in that: The connecting piece (107) has a plurality of threaded holes for threadedly connecting the laser diameter measuring instrument (2) and the speed measuring instrument (4).

4. A real-time monitoring system for fiber forming process according to claim 2, characterized in that: The horizontal carrying sliding block (106) is fixedly connected to the high-speed camera (3) and the infrared thermal imager (5) respectively by threaded connection.

5. A real-time monitoring system for fiber forming process according to claim 1, characterized in that: An adapter plate (103) is also fixed on the platform base (101); the adapter plate (103) is a right-angled triangle structure, and two right-angled sides of the adapter plate (103) are respectively connected to the upper surface of the platform base (101) and the vertical slide rail (104).

6. A real-time monitoring system for fiber forming process according to claim 5, characterized in that: The adapter plate (103) is connected to the platform base (101) and the vertical slide rail (104) respectively by welding or threaded connection.

7. A real-time monitoring system for fiber forming process according to claim 1, characterized in that: The laser diameter meter (2) and the speed meter (4) are electrically connected to a computer (7) via a data acquisition device (6).

8. A real-time monitoring system for fiber forming process according to claim 1, characterized in that: The platform base (1) is a damping vibration isolation optical platform.

9. A real-time monitoring system for fiber forming process according to claim 1, characterized in that: The velocimeter (4) is a Doppler velocimeter.

10. A real-time monitoring method for a fiber forming process, characterized in that: A real-time monitoring system for a fiber forming process according to any one of claims 1 to 8, comprising the following steps: The fiber production equipment is turned on, and after the produced silk is stable, the vertical slide rail (104) and the horizontal slide rail (105) are adjusted to the preset position of the fiber to be measured, and after the data is collected, the vertical slide rail (104) and the horizontal slide rail (105) are adjusted again to collect data at other positions; after all data are collected, the fiber production equipment is turned off, the horizontal slide rail (105) is moved to the lowest point, the laser diameter meter (2), the high-speed camera (3), the speed meter (4) and the infrared thermal imager (5) are removed, and the power is turned off.

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