A computerized flat knitting machine non-adjustment system

Abstract

The present invention discloses a computerized flat knitting machine debugging-free system, which comprises a plurality of multi-channel constant-tension yarn length measuring devices. The plurality of multi-channel constant-tension yarn length measuring devices are connected to a textile equipment system. Each multi-channel constant-tension yarn length measuring device can respectively control the tension, yarn length and use of the yarns on multiple yarn paths. Each multi-channel constant-tension yarn length measuring device includes a main CPU and a plurality of yarn feeding devices. Each yarn feeding device includes a yarn wheel driven by a motor, a tension sensor and a yarn speed detection device. Wherein, a textile program is imported into the main CPU. The main CPU can, according to the textile program, compare the tension and yarn speed detected by the tension sensor and the yarn speed detection device with the parameters set in the textile program, control the rotation speed of the motor, and adjust the stitch density of the computerized flat knitting machine through the multi-channel constant-tension yarn length measuring device, so that the yarn tension and yarn length meet the requirements of the textile program. This device can simultaneously meet the yarn feeding requirements of multiple yarn paths, meet the requirements of constant tension control, real-time tension data providing, etc., and there is no need to individually debug each yarn path.

Description

Technical Field

[0001] The present invention relates to the technical field of computer flat knitting machines, and more particularly to a computer flat knitting machine debugging-free system. Background Art

[0002] Existing computer flat knitting machines form textiles through multiple groups of yarns, adopting a single-wire single-control method. The constant tension control and yarn length measurement of each yarn are two independent systems. When changing textile processes, separate debugging is required, making the debugging of computer flat knitting machines cumbersome and the structure bloated when knitting various different fabrics. Moreover, the existing equipment judges the change of yarn tension by detecting the length of the yarn entering and leaving the yarn, and at the same time adjusts the tension through the tension adjustment in the middle position to make the tension at the output position consistent with the tension at the input position, maintaining a relatively stable tension at the output end. This method is suitable for the reciprocating working mode of computer flat knitting machines. When the yarn nozzle moves back, the existing equipment can tighten the yarn, and when the yarn nozzle moves forward, the existing equipment relaxes the yarn. Currently, there are the following problems: 1. The tension control process is not clear. Only relying on the change of yarn length to judge the tension change is inconvenient to use and the effect is not intuitive. 2. The control range is limited. The current equipment mainly relies on the tensioning structure stored in the middle to control the tension. Once the length of the flat knitting machine exceeds the adjustable range of the tensioning structure, this tension control function will fail. 3. The applicable range is small. It is only applicable to the reciprocating knitting mode. The existing equipment does not apply power to the yarn, that is, it cannot achieve constant tension control at a low tension level, nor can it meet the constant tension demand for continuous yarn use. Summary of the Invention

[0003] The purpose of the present invention is to provide a computer flat knitting machine debugging-free system to solve the problems mentioned in the above background art.

[0004] To achieve the above purpose, the present invention adopts the following technical solution:

[0005] A computer flat knitting machine debugging-free system includes multiple multi-channel constant tension yarn length measuring devices. The multiple multi-channel constant tension yarn length measuring devices are connected to the textile equipment system. Each multi-channel constant tension yarn length measuring device can separately control the tension, yarn length and use of the yarns on multiple yarn paths. Each multi-channel constant tension yarn length measuring device includes a main CPU and multiple yarn feeding devices. The yarn feeding device is connected to the main CPU. Each yarn feeding device corresponds to a yarn path, and the yarn is conveyed on the yarn feeding device. Each yarn feeding device includes a yarn wheel driven by a motor, a tension sensor and a yarn speed detection device. Among them, the textile program is imported into the main CPU. The main CPU can, according to the textile program, based on the tension and yarn speed detected by the tension sensor and the yarn speed detection device, and compare with the parameters set in the textile program, control the motor to rotate the speed of the yarn wheel, and adjust the stitch density of the computer flat knitting machine through the multi-channel constant tension yarn length measuring device, so that the yarn tension and yarn length meet the requirements of the textile program.

[0006] Preferably, the main CPU calculates the yarn length according to the yarn feeding speed detected by the yarn speed detection device.

[0007] Preferably, the yarn speed detection device is a motor Hall sensor, which is used to monitor the rotation speed of the motor. According to the motor rotation speed, the main CPU can calculate the yarn length.

[0008] Preferably, the yarn speed detection device includes a yarn guide wheel, on which magnets are arranged along its radial direction. The yarn speed detection device is provided with a magnetic encoder, which is connected to the main CPU. During the yarn feeding process, the yarn bypasses the yarn guide wheel, and the magnetic encoder detects the position change of the magnets, calculates the number of rotations of the yarn guide wheel, and further calculates the yarn length.

[0009] Preferably, the main CPU can read the textile program stored in an external device or directly read the textile program stored inside the main CPU.

[0010] Preferably, the main CPU is connected to a motor coil control circuit for controlling the rotation of the motor; the main CPU is also connected to a tension sensor through a tension sensor interface circuit.

[0011] Preferably, each multi-channel constant tension yarn length measuring device can communicate with other multiple multi-channel constant tension yarn length measuring devices through a CAN bus and can also communicate with a textile equipment system through the CAN bus.

[0012] Preferably, the main CPU is also connected to a display screen, through which a human-machine interface can be used to display and set parameters such as the tension, yarn length, and usage of each multi-channel constant tension yarn length measuring device.

[0013] Preferably, the multi-channel constant tension yarn length measuring device further includes a plurality of yarn break alarm circuits, and each yarn corresponds to one yarn break alarm circuit.

[0014] Preferably, the main CPU is also connected to a motor current detection circuit for monitoring the motor current during the operation of the motor, so as to prevent the circuit from being burned out due to overcurrent or overload.

[0015] Compared with the prior art, the present invention has at least the following advantages:

[0016] The present invention can replace the left and right elastic edge wire frames of a flat knitting machine. The present invention is equipped with an electronic pressure sensor that applies the strain effect, which can accurately measure the real-time tension data of each yarn. Based on parameters such as the magnitude and change rate of the tension data, according to the actual tension requirements of the woven fabric, the motor is controlled to rotate the yarn wheel, driving the yarn to advance, and the rotation speed is accurately controlled to make the yarn tension meet the preset tension requirements, ensuring that the yarn tension of the same fabric structure is constant. At the same time, the rotation amount of the yarn guide wheel is accurately measured by a magnetic encoder to obtain the real-time yarn feeding length, and the error is compared with the theoretical yarn length. If the error exceeds the set value, the stitch density of the flat knitting machine will be adjusted through a multi-channel constant tension yarn length measuring device. Through software and hardware design, this device can simultaneously meet the requirements of multi-channel yarn feeding, constant tension control, real-time tension data provision, etc. In actual production, for different textile fabrics, there is no need to individually debug each yarn path. As long as the pattern of each fabric is set, by inputting parameters such as yarn tension and yarn length into each flat knitting machine through this system, the tension and length of each yarn path are directly controlled by this system, which will achieve the product uniformity of mass production and improve production efficiency, providing feasibility for the intelligent workshop of flat knitting machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of a multi-channel constant tension yarn length measuring device according to an embodiment of the present invention.

[0018] Figure 2 It is a structural block diagram of the device of the present invention.

[0019] Figure 3 It is a schematic connection structure diagram of the main chip control according to an embodiment of the present invention.

[0020] Figure 4 It is a circuit diagram of the main CPU according to an embodiment of the present invention.

[0021] Figure 5 It is a circuit diagram of the motor coil control circuit and the motor current detection circuit of the present invention.

[0022] Figure 6 It is a circuit diagram of the 485 interface circuit of the present invention.

[0023] Figure 7 It is a circuit diagram of the tension sensor interface of the present invention.

[0024] Figure 8 It is a circuit diagram of the broken yarn detection of the present invention.

[0025] Figure 9 It is a power supply circuit diagram of the present invention.

[0026] Figure 10 It is a schematic diagram of the path of the yarn of the present invention

[0027] Labels in the figure: 1 - Yarn feeding device; 2 - Yarn guide wheel; 3 - Yarn wheel; 4 - Pressure sensor; 5 - Yarn. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present invention clearer, the following provides a detailed description in conjunction with the accompanying drawings and specific implementation manners. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0029] It should be noted that when an element is referred to as "fixedly provided on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to an element or there may be intermediate elements at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation manners.

[0030] Refer to Figures 1-10 , this embodiment discloses a computerized flat knitting machine non - debugging system, including a plurality of multi - path constant - tension yarn length measuring devices. The multi - path constant - tension yarn length measuring devices are communicatively connected to the textile equipment system through a CAN bus, and each of the multi - path constant - tension yarn length measuring devices can communicate with other multiple multi - path constant - tension yarn length measuring devices through the CAN bus.

[0031] Each of the multi - path constant - tension yarn length measuring devices can respectively control the tension, yarn length and use of the yarns on multiple yarn paths. Among them, each of the multi - path constant - tension yarn length measuring devices includes a main CPU and a plurality of yarn feeding devices. Each yarn feeding device corresponds to one yarn path, and the yarn is conveyed on the yarn feeding device. In this embodiment, each multi - path constant - tension yarn length measuring device controls the tension, yarn length and use of the yarns on 8 yarn paths. The main CPU includes main chip 1 and main chip 2, and main chip 1 and main chip 2 respectively control the tension, yarn length and use of the yarns on 4 yarn paths. Each of the yarn feeding devices includes a yarn wheel 3 driven by a motor and a tension sensor 4; main chip 1 and main chip 2 are respectively connected to a motor coil control circuit for controlling the rotation of the motor. The motor coil control circuit is as Figure 5 shown, and the motor coil control circuit is composed of 3 IR2103 motor drive chips and their peripheral circuits. The motor of each yarn feeding device is connected to a motor coil control circuit; main chip 1 and main chip 2 are also respectively connected to a tension sensor through a tension sensor interface circuit. The tension sensor interface circuit is as Figure 7 shown. The tension sensor is used to monitor the tension of the yarn, and the tension sensor uses an electronic pressure sensor applying the strain effect.

[0032] The yarn feeding device further includes a yarn speed detection device for monitoring the yarn feeding speed. The main chip 1 and the main chip 2 respectively calculate the yarn length according to the detected yarn feeding speed.

[0033] In one embodiment, the yarn speed detection device is a motor Hall sensor. The motor Hall sensor is connected to the motor yarn control circuit through a motor Hall wiring circuit. The motor Hall sensor is used to monitor the rotation speed of the motor. The yarn is wound around the yarn wheel 3. When the motor rotates, the yarn wheel 3 rotates accordingly. One rotation of the yarn wheel 3 corresponds to a certain length of the yarn. The main CPU can calculate the number of rotations of the yarn and the corresponding yarn length according to the motor rotation speed.

[0034] In another embodiment, the yarn speed detection device includes a yarn guiding wheel 2. A magnet is arranged on the yarn guiding wheel 2 along its radial direction. The yarn speed detection device has a magnetic encoder. The magnetic encoder is connected to the main CPU. Each yarn bypasses the yarn guiding wheel. During the yarn feeding process, when the yarn guiding wheel rotates, the magnet rotates accordingly. The magnetic encoder detects the change in the position of the magnet and calculates the number of rotations of the yarn guiding wheel. The main CPU calculates the yarn length according to the number of rotations of the yarn guiding wheel.

[0035] The main CPU can read the textile program stored in an external device, or directly read the textile program stored inside the main CPU. This textile program mainly includes the parameters preset for different yarns in different textile processes, such as tension, yarn length, yarn usage, etc. In this embodiment, each multi-channel constant tension yarn length measuring device includes a USB interface circuit connected to the main CPU. Through the USB interface circuit, the textile program stored in the USB flash drive can be read into the main CPU. The main CPU is also connected to a display screen through a 485 interface circuit. The circuit diagram of the 485 interface is as Figure 6 shown, or the main CPU can be connected to the display screen through a CAN bus. The display screen is a touch screen. Through this display screen, a human-machine interface for displaying and setting the tension, yarn length, usage and other parameters of each multi-channel constant tension yarn length measuring device can be provided, and program calls can be made through the human-machine interface of this device.

[0036] The multi-channel constant tension yarn length measuring device further includes a plurality of yarn break alarm circuits. The circuit diagram of the yarn break alarm circuit is as Figure 8 shown. Each yarn corresponds to a yarn break alarm circuit, which is used to alarm the breakage of the yarn of this path and transmit the yarn break alarm signal to the textile equipment system.

[0037] Preferably, the main CPU is further connected to a motor current detection circuit for monitoring the current during the operation of the motor, so as to prevent the circuit from being burned out due to overcurrent or overload.

[0038] This device is connected to a power supply circuit, which is as follows Figure 9 shown, and is used to supply power to the motor and the main CPU. The power supply circuit includes a power supply voltage monitoring circuit, which is used to provide an analog signal to the main CPU for real-time monitoring of the power supply voltage. The power supply circuit also includes a power-off signal generation circuit, which provides a digital signal to the main CPU when power is off, preparing for the main CPU to save data.

[0039] In the specific implementation process, each yarn bypasses the yarn guide wheel and the yarn wheel in turn during the yarn feeding process, passes through the tension sensor, and imports the textile program into the main CPU. The main CPU can calculate the yarn length based on the tension and yarn speed detected by the tension sensor and the yarn speed detection device according to the textile program, compare it with the parameters set in the textile program, control the rotation speed of the motor to drive the yarn wheel, drive the yarn of this path forward, and adjust the stitch density of the flat knitting machine through the multi-channel constant tension yarn length measuring device, so that the yarn tension and length meet the requirements of the textile program. The multi-channel constant tension yarn length measuring device can control multiple yarns to carry out the textile process at the same time, and control the tension and length of each yarn at the same time, so that each yarn is knitted according to the parameters set in the textile program, so that the flat knitting machine does not need to be debugged when changing the textile process.

[0040] This invention is equipped with an electronic pressure sensor that applies the strain effect, which can accurately measure the real-time tension data on the yarn. According to the parameters such as the magnitude and change rate of the tension data, and according to the actual tension requirements of the knitted fabric, the motor is controlled to drive the power wheel to drive the yarn forward, and the rotation speed is accurately controlled to make the yarn tension meet the preset tension requirements, ensuring that the yarn tension of the same fabric structure is constant. At the same time, the rotation amount of the yarn guide wheel is accurately measured by the magnetic encoder to obtain the real-time yarn feeding length, and compared with the theoretical yarn length for error. If the error exceeds the set value, the stitch density of the flat knitting machine will be adjusted through the multi-channel constant tension yarn length measuring device. This device can meet the requirements of multi-channel yarn feeding, constant tension control, and real-time tension data provision through software and hardware design. In actual production, for different textile fabrics, there is no need to debug each yarn path separately. As long as the pattern of each fabric is set, by inputting parameters such as yarn tension and yarn length into each flat knitting machine through this device, this device controls the yarn to be knitted according to the set parameter values, realizing no debugging, achieving the product unity of mass production, and improving production efficiency. It provides feasibility for the intelligent workshop of flat knitting machines.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A computer flat knitting machine non - debugging system, characterized in that, It includes multiple multi-channel constant-tension yarn length measuring devices. The multiple multi-channel constant-tension yarn length measuring devices are connected to the textile equipment system. Each multi-channel constant-tension yarn length measuring device can respectively control the tension, yarn length and use of the yarns on multiple yarn paths; Each multi-channel constant-tension yarn length measuring device includes a main CPU and multiple yarn feeding devices; The yarn feeding device is connected to the main CPU; Each yarn feeding device corresponds to one yarn path, and the yarn is conveyed on the yarn feeding device. Each yarn feeding device includes a yarn wheel driven by a motor, a tension sensor and a yarn speed detection device; The yarn speed detection device includes a yarn guiding wheel, a magnet is arranged along the radial direction of the yarn guiding wheel, the yarn speed detection device is provided with a magnetic encoder, and the magnetic encoder is connected to the main CPU. During the yarn feeding process, the yarn bypasses the yarn guiding wheel, the magnetic encoder detects the change in the position of the magnet, calculates the number of rotations of the yarn guiding wheel, and further calculates the yarn length; The main CPU is connected with a motor coil control circuit for controlling the rotation of the motor; The main CPU is also connected with a tension sensor through a tension sensor interface circuit; Among them, the textile program is imported into the main CPU. The main CPU can, according to the textile program, based on the tension and yarn speed detected by the tension sensor and the yarn speed detection device, and compare with the parameters set in the textile program, control the rotation speed of the motor to drive the yarn wheel, and adjust the stitch density of the flat knitting machine through the multi-channel constant-tension yarn length measuring device, so that the yarn tension and yarn length meet the requirements of the textile program; Each multi-channel constant-tension yarn length measuring device can communicate with other multiple multi-channel constant-tension yarn length measuring devices through the CAN bus, and can communicate with the textile equipment system through the CAN bus.

2. The computer flat knitting machine non-adjustment system according to claim 1, wherein The main CPU calculates the yarn length according to the yarn feeding speed detected by the yarn speed detection device.

3. The computer flat knitting machine non-adjustment system according to claim 2, wherein, The yarn speed detection device is a motor Hall sensor, and the motor Hall sensor is used to monitor the rotation speed of the motor. According to the motor rotation speed, the main CPU can calculate the yarn length.

4. The computer flat knitting machine non-adjustment system according to claim 1, characterized in that The main CPU can read the textile program stored in an external device, or directly read the textile program stored inside the main CPU.

5. The computerized flat knitting machine non-adjustment system according to claim 1, wherein, The main CPU is also connected with a display screen, and through this display screen, a human-machine interface for displaying and setting the tension and yarn length use parameters of each multi-channel constant-tension yarn length measuring device can be provided.

6. The computerized flat knitting machine non-adjustment system according to claim 1, characterized in that, The multi-channel constant-tension yarn length measuring device also includes multiple yarn breakage alarm circuits, and each yarn path corresponds to one yarn breakage alarm circuit.

7. The computer flat knitting machine debugging-free system according to claim 1, characterized in that, The main CPU is also connected with a motor current detection circuit for monitoring the motor during operation to prevent the circuit from being burned out due to overcurrent or overload.

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