CN112796036A - Bobbin state detection method - Google Patents
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- CN112796036A CN112796036A CN202011603835.8A CN202011603835A CN112796036A CN 112796036 A CN112796036 A CN 112796036A CN 202011603835 A CN202011603835 A CN 202011603835A CN 112796036 A CN112796036 A CN 112796036A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C3/00—Braiding or lacing machines
- D04C3/48—Auxiliary devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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- Knitting Machines (AREA)
- Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
Abstract
A bobbin state detection method belongs to the technical field of mechanical automation of knitting machines. The invention aims at the problems that the existing bobbin state is manually and visually identified, the working strength is high and the identification result is unreliable. The method comprises the steps of detecting an empty yarn state, and acquiring a current bobbin image when a bobbin moves to a detection end by adopting a visual detection module; judging the current state of the bobbin by adopting a visual processing module according to the bobbin image, and sending a stop instruction when the judgment result is in an empty state; and controlling the motion of the bobbin by adopting a PLC servo control module, and stopping the bobbin at a specified position when receiving the stop instruction. The invention replaces the high-intensity and missing detection process of manual visual identification, and lightens the working intensity.
Description
Technical Field
The invention relates to a bobbin state detection method, and belongs to the technical field of mechanical automation of knitting machines.
Background
The knitting machine needs to visually recognize the empty bobbin state during the process of knitting the cable. At present, the identification of the state of the empty wire adopts manual visual identification, the identification work intensity is high, and the requirement on the technical proficiency is high. For the work posts with strong mobility, a great deal of time is spent on training the recognition capability of workers, so that the manpower resource is wasted, and the reliability of the recognition result is difficult to ensure.
Disclosure of Invention
The invention provides a bobbin state detection method, aiming at the problems that the existing bobbin state is manually and visually identified, the working strength is high and the identification result is unreliable.
The bobbin state detection method comprises the steps of detecting the empty yarn state,
collecting a current bobbin image when the bobbin moves to a detection end by adopting a visual detection module;
judging the current state of the bobbin by adopting a visual processing module according to the bobbin image, and sending a stop instruction when the judgment result is in an empty state;
and controlling the motion of the bobbin by adopting a PLC servo control module, and stopping the bobbin at a specified position when receiving the stop instruction.
According to the bobbin state detection method, the visual detection module comprises a kilomega industrial Ethernet camera, a first metal proximity switch, an annular light supplement lamp and a polaroid, and the visual detection module is fixed on a knitting machine to which the bobbin belongs through a mechanical support;
the kilomega industrial Ethernet camera is fixed on the mechanical support, and the installation position of the kilomega industrial Ethernet camera corresponds to the detection end, so that the bobbin is imaged at the center of the visual field of the bobbin; the first metal proximity switch is arranged in a sliding groove of the mechanical support and can move along the sliding groove; the first metal proximity switch is used for sending a trigger signal to the industrial Ethernet camera and the annular light supplement lamp when the bobbin moves to the detection end, so that the annular light supplement lamp sends a light supplement signal when the industrial Ethernet camera collects images; and the image acquisition end of the industrial Ethernet camera is provided with a polaroid.
According to the bobbin state detection method, the visual processing module judges the current state of the bobbin and comprises the following steps:
performing RGB color space conversion on the bobbin image, performing HSV color space conversion, and then sequentially performing binarization, median filtering and morphological filtering to define an ROI processing area; and extracting the outline of the ROI processing area, calculating the empty yarn proportion of the bobbin according to the outline extraction result, and judging that the current state of the bobbin is the empty yarn state when the calculation result is smaller than a set threshold value.
According to the bobbin state detection method, the PLC servo control module is in data communication with the visual processing module through a TCP protocol.
According to the bobbin state detection method, the PLC servo control module comprises a touch screen, and an automatic stop function key and a visual stop function key are preset in the touch screen;
when the PLC servo control module receives the stop instruction, the bobbin is decelerated according to a preset deceleration mode; the bobbin is stopped at the designated position by an automatic stop function key or a visual stop function key selected by a user.
According to the bobbin state detection method of the present invention, the step of stopping the bobbin at a predetermined position by the user selecting the automatic stop function key comprises:
when the PLC servo control module receives the stop instruction, a user selects an automatic stop function key, and a counter of the PLC servo control module is started to reset for counting; and when the count value of the counter reaches the preset count value, sending a stop instruction to the knitting machine to enable the bobbin to stop at the designated position.
According to the bobbin state detection method of the present invention, the user selecting the visual stop function key to stop the bobbin at the designated position includes:
and when the PLC servo control module receives the stop instruction, a user selects a visual stop function key to visually send the stop instruction to the knitting machine by manually pressing a stop button on the operation panel when the bobbin reaches the designated position, so that the bobbin is stopped at the designated position.
The bobbin state detection method according to the present invention further includes:
arranging a metal gasket on the upper surface of the tensioner in the direction after the yarn breakage of the bobbin;
a second metal proximity switch is arranged on the mechanical support, so that the axis of the second metal proximity switch is coincided with the axis of the tensioner after the bobbin is broken, and the second metal proximity switch is away from the metal gasket by a preset distance;
and when the second metal proximity switch senses a position signal of the metal gasket, a disconnection signal is sent to the PLC servo control module.
The invention has the beneficial effects that: the invention adopts the visual processing technology to detect the running state of the bobbin of the knitting machine, combines visual identification, visual processing and servo control, realizes the detection of the empty yarn state of the bobbin, and can greatly reduce the working strength of workers; and because the manual operation is separated, the invention can continuously work with high strength continuously, and the working efficiency of the knitting machine can be greatly improved.
According to the invention, the corresponding trigger pulse signal generated by the metal proximity switch is used for controlling the camera to acquire an image, the visual processing module is used for accurately identifying the empty thread state in the bobbin image, and the servo control system is further linked to control the start and stop of the knitting machine for thread changing operation, so that the high-strength and missing detection process of manual visual identification is replaced, and the working strength is reduced.
Drawings
Fig. 1 is a flow chart of a bobbin state detection method according to the present invention;
fig. 2 is a flow chart of the visual processing module judging the current state of the bobbin;
FIG. 3 is a schematic structural diagram of a mechanical support, wherein FIG. 1 is a chute for mounting a first metal proximity switch; and 2, a mounting hole is used for mounting a second metal proximity switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
In a first embodiment, as shown in fig. 1 to 3, the present invention provides a bobbin state detection method, including empty thread state detection,
collecting a current bobbin image when the bobbin moves to a detection end by adopting a visual detection module;
judging the current state of the bobbin by adopting a visual processing module according to the bobbin image, and sending a stop instruction when the judgment result is in an empty state;
and controlling the motion of the bobbin by adopting a PLC servo control module, and stopping the bobbin at a specified position when receiving the stop instruction.
The embodiment can be additionally provided with a display module for displaying the rotating information and state of the knitting machine.
The visual processing module can perform corresponding processing on the image on the industrial control host and judge whether the currently acquired image has an empty line state. The PLC servo control module can respond to the judgment result of the empty wire state in time to control the start and stop of the braiding machine.
Further, as shown in fig. 3, the visual detection module includes a gigabit industrial ethernet camera, a first metal proximity switch, an annular light supplement lamp, and a polarizer, and is fixed on the knitting machine to which the bobbin belongs through a mechanical bracket;
the kilomega industrial Ethernet camera is fixed on the mechanical support, and the installation position of the kilomega industrial Ethernet camera corresponds to the detection end, so that the bobbin is imaged at the center of the visual field of the bobbin; the first metal proximity switch is arranged in a chute 1 of the mechanical support and can move along the chute 1; the first metal proximity switch is used for sending a trigger signal to the industrial Ethernet camera and the annular light supplement lamp when the bobbin moves to the detection end, so that the annular light supplement lamp sends a light supplement signal when the industrial Ethernet camera collects images; and the image acquisition end of the industrial Ethernet camera is provided with a polaroid.
The first metal proximity switch can detect a signal when the bobbin rotates to a position designated by the visual field of the camera, and generates a trigger pulse to trigger the camera to acquire an image; the arrangement of annular light filling lamp and polaroid has guaranteed jointly that the camera can gather a suitable and less picture of interference of exposure for subsequent image processing.
In this embodiment, when the spool moved to the camera detection end under the control of the PLC servo control module, a metal proximity switch could sense the signal generated by the metal disc on the spool base, and then trigger the gigabit industrial Ethernet camera, the photographing mode of the camera is preset to be a hardware triggering mode. And judging the image acquired by the camera, and stopping the empty bobbin at a specified position to wait for the yarn changing operation under the control of the PLC servo control module when the judgment result is in an empty yarn state.
According to the embodiment, the camera is triggered through hardware, light is supplemented by the light source in the imaging process, and subsequent image processing is combined, so that the empty line detection of the bobbin is realized, and the accurate identification of the bobbin at different running speeds can be realized.
The arrangement position of the kilomega industrial Ethernet camera needs to ensure that the bobbin image acquired every time is in the center of the visual field of the bobbin image, so that the continuous vision processing algorithm can be processed quickly. Under the general condition, the moving track of the red and green yarn tubes of the knitting machine in the space plane is fixed, so that a picture with a fixed angle can be taken by placing a camera at a fixed position, and the position of the yarn tubes is detected by combining a first metal proximity switch, so that the image acquired by the camera each time is in the central position.
The laser proximity sensor is compared with the metal proximity switch in an experiment, and the metal proximity switch is selected to effectively avoid signal interference because the edge of the bobbin is metal.
The sliding groove 1 of the mechanical support can be a long groove with the length of 50mm, as shown in fig. 3, the first metal proximity switch can be conveniently moved, and the trigger point can be adjusted, so that an image acquired after the camera is triggered is always in the center of the image view in the subsequent debugging process.
The design of annular light filling lamp is the environmental change of considering industrial field, can avoid the influence of ambient light to camera exposure after adding the light filling. The polaroid can filter the interference of the light filling lamp on the light reflected by the white fiber on the bobbin, and an image reflected by only the white fiber is obtained; meanwhile, the surrounding environment is relatively dark in the image, so that the target and the environment background color after subsequent binarization can be obviously distinguished conveniently.
Because the rotation of the yarn tubes on the knitting machine is divided into two yarn tubes with red and green different rotation directions, the vision detection modules are correspondingly provided with two sets and respectively correspondingly detect the red and green yarn tubes. The mounting position of the visual detection module and the position of the first metal proximity switch are related to the processing of a visual processing algorithm, so that the mounting position of the visual detection module and the fine adjustment position of the proximity switch are very critical steps. The visual inspection module is characterized in that the camera view center line is parallel to the proximity switch, and when the bobbin rotates to the position where the proximity switch stops operating, the bobbin image collected by the camera is exactly the center of the image. The key part of the fine tuning is to fine tune the proximity switch, and the sensing distance sensed by the proximity switch is 10 mm. Therefore, the proximity switch can be moved along the chute 1 in fig. 3, the calibration of the central position of the image is carried out by matching with a test program, and the position is finely adjusted to enable the central position of the image bobbin acquired after triggering to be located at the center of the image. Cameras corresponding to red and green yarn tubes need to be calibrated respectively, and only different camera IP addresses need to be switched.
The periphery of the visual detection module can be integrally provided with a protective cover so as to be beneficial to on-site industrial protection. Due to the fixed position of the camera, fine adjustment can be performed according to the situation of the site only by moving the proximity switch along the chute 1. The visual detection module is fixed on the mechanical support, and the mechanical support is fixed on the table top of the knitting machine, so that the position of the visual detection module relative to the rotating track of the red and green yarn bobbin on the table top of the knitting machine is fixed, the required image can be obtained only by adjusting the position of the proximity switch, and the variable needing intermediate adjustment is simplified.
Still further, as shown in fig. 2, the judging, by the vision processing module, the current state of the bobbin includes:
performing RGB color space conversion on the bobbin image, performing HSV color space conversion, and then sequentially performing binarization, median filtering and morphological filtering to define an ROI processing area; and extracting the outline of the ROI processing area, calculating the empty yarn proportion of the bobbin according to the outline extraction result, and judging that the current state of the bobbin is the empty yarn state when the calculation result is smaller than a set threshold value.
When the target bobbin is a full bobbin, the contour extraction result is a rectangular area, and a constant value can be obtained through calculation. And when the bobbin is empty, the calculation result of the contour extraction is obviously smaller than the constant. Therefore, the set threshold value can be selected according to the constant, and whether the collected yarn tube is empty can be judged by comparing the calculation result of the contour extraction with the set threshold value.
The binaryzation treatment can be used for distinguishing the white color of the fiber on the bobbin from the surrounding environment to obtain the difference between the white color and the surrounding environment. And after binarization, carrying out filtering processing on the image, wherein the filtering processing comprises median filtering and morphological filtering, adding an ROI (region of interest) area to the area of the bobbin shaft at the center position of the image, extracting the outline of the bobbin in the ROI area, and further calculating the proportion of the blank line. The calculated length of the area outline is used as a calculated proportion, the empty line state is set as a threshold value according to the proportion, and the empty line state is considered to be the empty line state when the proportion is less than the threshold value.
And further, the PLC servo control module is in data communication with the visual processing module through a TCP protocol.
The vision processing module can comprise a main control computer, and the main control computer can be in data communication with the PLC servo control module through a TCP/IP protocol. The main control computer can be programmed by Python3.7.5 as a server side. The PLC servo control module can be used as a client and always waits for the main control computer to send an instruction.
And the main control computer sends a stop instruction to the client when the bobbin is empty, and the client responds to the stop instruction to control the knitting machine to stop moving so as to perform thread changing operation. After the thread changing is finished, the knitting machine can be started again to operate through the PLC servo control module, so that the knitting machine operates at a specified speed.
The operation interface of the main control computer can set the two-stage speed of the braiding machine, and the speed reduction operation speed is executed after the empty line state is found.
Still further, the PLC servo control module comprises a touch screen, and an automatic stop function key and a visual stop function key are preset in the touch screen;
when the PLC servo control module receives the stop instruction, the bobbin is decelerated according to a preset deceleration mode; the bobbin is stopped at the designated position by an automatic stop function key or a visual stop function key selected by a user.
An operating panel can be arranged at the operating position of yarn tube yarn changing, two mechanical switch buttons are arranged, one is used for starting the knitting machine to run, and the other is used for stopping the knitting machine to run.
The visual processing module can send a deceleration instruction to the PLC servo control module when detecting the empty yarn state of the bobbin, the PLC servo control module can operate according to the deceleration speed set by a user, and then the automatic stop or visual stop function is selected on the touch screen.
As an example, the step of stopping the bobbin at the designated position by the user selecting the automatic stop function key includes:
when the PLC servo control module receives the stop instruction, a user selects an automatic stop function key, and a counter of the PLC servo control module is started to reset for counting; and when the count value of the counter reaches the preset count value, sending a stop instruction to the knitting machine to enable the bobbin to stop at the designated position to wait for the yarn changing operation. The automatic stop function key can start the counter function of the PLC servo control module.
As an example, the user selecting the visual stop function key to stop the bobbin at the designated position includes:
and when the PLC servo control module receives the stop instruction, a user selects a visual stop function key to visually send the stop instruction to the knitting machine by manually pressing a stop button on the operation panel when the bobbin reaches the designated position, so that the bobbin is stopped at the designated position. In this way, the speed reduction state of the knitting machine is observed manually, and when the empty bobbin is waiting to rotate to the position suitable for operation visually, the motion of the knitting machine is stopped by manually pressing a stop button, and then the thread changing operation is carried out.
Both of the above two modes can be selectively realized in the touch screen display interface.
Under the mode of selecting the visual stop function key, the knitting machine enters into an automatic deceleration mode after the bobbin is in an empty state, the knitting machine stops running and enters into a thread changing operation when the empty bobbin is manually waited to rotate to a proper operation position, and the empty bobbin can be manually observed to rotate to a target position according to an empirical value to stop the empty bobbin.
The automatic stopping function is that the yarn bobbins with red and green colors are respectively determined according to the number of the yarn bobbins rotating through the detection position of the camera, the approach switch signal of the detection position of the camera can be accessed into a DI port of the PLC for counting, and the yarn bobbins automatically stop when the counting reaches a set value, and enter the yarn changing operation. After the thread changing operation is finished, the start button is manually pressed, the PLC servo control system sends a command of the rotation of the knitting machine to the main control computer, and the main control computer starts to carry out image acquisition and processing operations after receiving a state command of the running knitting machine and waits for the detection of an empty thread state.
Still further, as shown in fig. 3, the present embodiment further includes a disconnection state detection:
arranging a metal gasket on the upper surface of the tensioner in the direction after the yarn breakage of the bobbin;
a second metal proximity switch is arranged in a mounting hole 2 of the mechanical support, so that the axis of the second metal proximity switch is coincident with the axis of the tensioner after the bobbin is broken, and the second metal proximity switch is away from the metal gasket by a preset distance;
and when the second metal proximity switch senses a position signal of the metal gasket, a disconnection signal is sent to the PLC servo control module.
The invention can also realize the detection of the yarn breakage condition of the yarn bobbin. The braider can be stopped at a position convenient for workers to carry out wire breakage processing in a wire breakage state through the induction signal of the second metal proximity switch and the control of the PLC servo control module.
The broken line is expressed as that the line in the line outgoing direction of the bobbin is accidentally broken in the weaving process, and the bobbin corresponding to the broken line is not in an empty line state, so that the broken line cannot be identified through the visual processing module. The current solution for thread breakage is to run the braiding machine at a reduced speed and look for thread breakage spools visually, which is inefficient. According to the embodiment, non-contact broken line detection is realized in a metal proximity switch mode, and the limitation of the running speed is avoided.
The second metal proximity switch can adopt an M18 size, and the distance of the induction iron is 15 mm; as shown in fig. 3, the second metal proximity switch is installed on the installation hole 2, and the distance from the axis to the bottom edge of the mechanical support can be 65 mm; the distance between the screw of the plastic tensioner carried by the spool in the state without wires and the bottom edge of the mechanical support is 65mm, and the distance is consistent with the center of the second metal proximity switch. The plastic tensioner shell carried by the yarn bobbin shaft is a circle with the diameter of 32mm, and the yarn bobbin shaft is fixed on the center by using an M4 socket head cap screw. The gasket of the socket head cap screw is changed into a galvanized iron metal gasket with the inner diameter of 5mm, the outer diameter of 30mm and the thickness of 1mm or 2mm, so that the induction area of the plastic tensioner and the second metal proximity switch can be increased. The metal gasket can also be an element for increasing the content of metal iron in the shell of the plastic tensioner in other forms, and the second metal proximity switch can acquire an induction signal conveniently. The inner hexagonal carbon steel screw can be changed into a screw with larger size and high iron content by changing the inner hexagonal carbon steel screw to replace the arrangement of a metal gasket; or the shell of the slip ring is changed into a shell with higher iron content to increase the induction area with the second metal proximity switch.
The mode of increasing the metal gasket does not influence the use of the existing equipment, and has small engineering quantity and low cost. After the metal proximity switch detects the broken wire, the broken wire spool can be automatically transferred to a manual operation area through the PLC servo control module to wait for processing.
The center of the screw of the tensioner is 65mm of the ground of the metal bracket under the condition of no string. Since the tensioner base can accumulate a great deal of fiber in the industrial field, the center of the tensioner is not at 65mm but higher than the position in the case of wire breakage, so that the metal proximity switch adopting M18 is positioned at the height of 65mm of the metal bracket, and the problem can be solved. Referring to fig. 3, in the installation position of the second metal proximity switch, the bobbin tensioner is pulled to the top end in the normal working process, and the distance between the top end and the second metal proximity switch is about 45mm, so that the phenomenon of misoperation is avoided. When the second metal proximity switch senses the tensioner under the condition of wire breakage, a new counter can be reset, and when the numerical value of the counter is equal to the red-green spool count value arranged on the touch screen, the knitting machine stops and stops at the position which can be manually operated to perform wire breakage treatment. After the thread breakage is processed, a mechanical start button on the operation panel beside the thread breakage is manually pressed, the braiding machine normally operates, and the problem that manual speed reduction visual identification is needed is solved.
The method of the invention is tested on site, and the test data shows that:
a high-speed section: the testing speed is 1000 r/min-1500 r/min, the speed of the bobbin corresponding to the fastest speed 1500r/min of the bobbin is 10/s, namely 100ms is rotated by one bobbin.
A low-speed stage: within the test speed of 1000r/min, the identification of the yarn tube is accurate.
Identification accuracy: 95 percent.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (8)
1. A bobbin state detection method is characterized by comprising the steps of detecting an empty yarn state,
collecting a current bobbin image when the bobbin moves to a detection end by adopting a visual detection module;
judging the current state of the bobbin by adopting a visual processing module according to the bobbin image, and sending a stop instruction when the judgment result is in an empty state;
and controlling the motion of the bobbin by adopting a PLC servo control module, and stopping the bobbin at a specified position when receiving the stop instruction.
2. A bobbin state detecting method according to claim 1,
the visual detection module comprises a kilomega industrial Ethernet camera, a first metal proximity switch, an annular light supplement lamp and a polaroid, and is fixed on a knitting machine to which the bobbin belongs through a mechanical support;
the kilomega industrial Ethernet camera is fixed on the mechanical support, and the installation position of the kilomega industrial Ethernet camera corresponds to the detection end, so that the bobbin is imaged at the center of the visual field of the bobbin; the first metal proximity switch is arranged in a sliding groove of the mechanical support and can move along the sliding groove; the first metal proximity switch is used for sending a trigger signal to the industrial Ethernet camera and the annular light supplement lamp when the bobbin moves to the detection end, so that the annular light supplement lamp sends a light supplement signal when the industrial Ethernet camera collects images; and the image acquisition end of the industrial Ethernet camera is provided with a polaroid.
3. The bobbin state detection method according to claim 2, wherein the judging of the current state of the bobbin by the visual processing module includes:
performing RGB color space conversion on the bobbin image, performing HSV color space conversion, and then sequentially performing binarization, median filtering and morphological filtering to define an ROI processing area; and extracting the outline of the ROI processing area, calculating the empty yarn proportion of the bobbin according to the outline extraction result, and judging that the current state of the bobbin is the empty yarn state when the calculation result is smaller than a set threshold value.
4. A bobbin state detecting method according to claim 3,
and the PLC servo control module is in data communication with the visual processing module through a TCP protocol.
5. A bobbin state detecting method according to claim 4,
the PLC servo control module comprises a touch screen, and an automatic stop function key and a visual stop function key are preset in the touch screen;
when the PLC servo control module receives the stop instruction, the bobbin is decelerated according to a preset deceleration mode; the bobbin is stopped at the designated position by the user selecting the automatic stop function key or the visual stop function key.
6. A bobbin state detecting method according to claim 5,
enabling the bobbin to stay at the designated position by the user selecting the automatic stop function key comprises the following steps:
when the PLC servo control module receives the stop instruction, a user selects an automatic stop function key, and a counter of the PLC servo control module is started to reset for counting; and when the count value of the counter reaches the preset count value, sending a stop instruction to the knitting machine to enable the bobbin to stop at the designated position.
7. A bobbin state detecting method according to claim 5,
the user selects the visual stop function key to stop the bobbin at the designated position, and the visual stop function key comprises the following steps:
and when the PLC servo control module receives the stop instruction, a user selects a visual stop function key to visually send the stop instruction to the knitting machine by manually pressing a stop button on the operation panel when the bobbin reaches the designated position, so that the bobbin is stopped at the designated position.
8. A bobbin state detecting method according to any one of claims 2 to 7, further comprising a broken state detecting step of:
arranging a metal gasket on the upper surface of the tensioner in the direction after the yarn breakage of the bobbin;
a second metal proximity switch is arranged on the mechanical support, so that the axis of the second metal proximity switch is coincided with the axis of the tensioner after the bobbin is broken, and the second metal proximity switch is away from the metal gasket by a preset distance;
and when the second metal proximity switch senses a position signal of the metal gasket, a disconnection signal is sent to the PLC servo control module.
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| CN113807348A (en) * | 2021-08-24 | 2021-12-17 | 许继集团有限公司 | High-voltage cable target identification and positioning method and device |
| CN114232203A (en) * | 2021-12-13 | 2022-03-25 | 宜兴市新立织造有限公司 | Three-dimensional abnormal-shape integral automatic weaving device |
| CN115183703A (en) * | 2022-09-08 | 2022-10-14 | 江阴市东昊不锈钢管有限公司 | Image data processing system for smooth appraisal of stainless steel pipe opening |
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| CN114232203A (en) * | 2021-12-13 | 2022-03-25 | 宜兴市新立织造有限公司 | Three-dimensional abnormal-shape integral automatic weaving device |
| CN115183703A (en) * | 2022-09-08 | 2022-10-14 | 江阴市东昊不锈钢管有限公司 | Image data processing system for smooth appraisal of stainless steel pipe opening |
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