CN108004673B - Automatic missing stitch detection alarm device for computerized flat knitting machine - Google Patents
Automatic missing stitch detection alarm device for computerized flat knitting machine Download PDFInfo
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- CN108004673B CN108004673B CN201711334899.0A CN201711334899A CN108004673B CN 108004673 B CN108004673 B CN 108004673B CN 201711334899 A CN201711334899 A CN 201711334899A CN 108004673 B CN108004673 B CN 108004673B
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- knitting machine
- flat knitting
- controller
- computerized flat
- photoelectric sensor
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
- D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
- D04B35/20—Indicating, warning, or safety devices, e.g. stop motions responsive to defects, e.g. holes, in knitted products
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Abstract
The invention discloses an automatic missed stitch detection alarm device for a computerized flat knitting machine, which comprises a controller, a position groove, a moving block, a light source emitter and a photoelectric sensor, wherein the controller is installed on a roller stand of the computerized flat knitting machine, the position groove is embedded into the roller stand and is arranged in parallel with the photoelectric sensor, the moving block is matched with the position groove and can move along the position groove, the light source emitter is arranged on the moving block and is arranged in parallel with the photoelectric sensor and a roller, and the photoelectric sensor is installed on the roller stand, is vertical to the roller stand and is arranged in parallel with the roller. The controller also comprises a power supply circuit, a storage circuit, a serial communication interface circuit, a digital input circuit, a digital output circuit, a reset button, an LED nixie tube display and other peripheral auxiliary circuits. The invention has reasonable structure and convenient installation, automatically realizes missing stitch detection and alarm prompt, and can greatly improve the yield of the computerized flat knitting machine.
Description
Technical Field
The invention relates to the technical field of automatic control, in particular to an automatic missing stitch detection alarm device for a computerized flat knitting machine.
Background
In recent years, with the continuous development of the garment and textile industry, the sewing equipment industry is continuously upgraded, and various sewing equipment is continuously emerged. Of course, various types of auxiliary members are indispensable in the sewing machine. Missed stitches in a sewing product are common problems, and the traditional solution is that the missed checking phenomenon still occurs through manual detection, so that the defective rate of the product is high, and the overall quality of the processed product is influenced.
The computerized flat knitting machine is a double-needle plate latch needle weft knitting loom. The cam device is like a group of plane cams, the stitch of a knitting needle can enter the groove of the cam, the cam is moved, the knitting needle is forced to do regular lifting motion in the needle groove of the needle plate, and the yarn can be knitted into knitted fabric through the action of the needle hook and the needle latch. In the ascending process of the knitting needle, the coil gradually withdraws from the needle hook, the needle latch is opened, and the withdrawing needle latch is hung on the needle rod; during the descending process of the knitting needle, the needle hook hooks the newly laid yarn and draws and bends the newly laid yarn into a coil, meanwhile, the original coil is separated from the needle hook, the new coil passes through the old coil and is connected with the old coil in series, and the coil strings knitted by a plurality of knitting needles are mutually connected to form the knitted fabric.
During the knitting process of the computerized flat knitting machine, the phenomenon of stitch loop drop is called miss stitch, wherein the latch needle is not hooked to the newly laid yarn or is hooked to the yarn but is separated from the needle hook again after being looped. The main reasons for the occurrence of missed stitches are: the cam device is bad or worn, the yarn feeding is improper, the knitting needle is not good enough, the machine shakes, the yarn nozzle parking point position, the needle selecting mechanism of high and low butts and the like.
The missed stitch is one of the common problems which are difficult to debug in the knitting process of the computerized flat knitting machine, and the key problem of developing the computerized flat knitting machine is how to deal with the missed stitch generated in the knitting process and how to improve the device to realize automatic missed stitch detection.
For computerized flat knitting machines, common faults come from both mechanical and electrical control aspects. The electric control system has a diagnosis function, and generally, when a machine has a fault, the electric control system can prompt an alarm and prompt components and parts with the fault, such as poor cropping, yarn breakage, a front probe error and the like, so that the reason is only needed to be found according to the prompt. Aiming at missed diagnosis faults or defects, the improved device realizes automatic missed needle detection and automatic prompting or alarming function of an electric control system, and the requirement in the industry application is particularly urgent.
Disclosure of Invention
1. The invention aims to provide a novel method.
Aiming at the problems, the invention provides the computerized flat knitting machine missed stitch detection device which is reasonable in structural design, convenient to operate, high in efficiency, high in automation degree and good in flexibility.
2. The technical scheme adopted by the invention is disclosed.
An automatic missed stitch detection alarm device for a computerized flat knitting machine comprises a controller, a position groove, a movable block, a light source emitter and a photoelectric sensor, wherein the controller is installed on a roller frame of the computerized flat knitting machine, the position groove is embedded into the roller frame and is arranged in parallel with the photoelectric sensor, the movable block is matched with the position groove and can move along the position groove, the light source emitter is arranged on the movable block and is arranged in parallel with the photoelectric sensor and a roller, the photoelectric sensor is installed on the roller frame and is arranged in parallel with the roller frame and is vertical to the roller frame, the controller further comprises a power circuit, a storage circuit, a serial communication interface circuit, a digital input circuit, a digital output circuit, a reset button and an LED (light-emitting diode) nixie tube display, the controller is connected with a main controller of the computerized flat knitting machine through the serial communication interface circuit and sends missed stitch detection information and an alarm prompt to the main, the controller is connected with the photoelectric sensor through a digital input circuit to receive photoelectric sensing signals, and analyzes and processes the signals through a specific algorithm so as to judge whether needle leakage occurs.
Still further, the controller includes a core processor, which is a digital signal processor, model number TMS320f 2812.
Furthermore, the controller is connected with the light source emitter through a digital output circuit, and sends a control signal to start or stop the light source emitter.
Furthermore, the controller prompts the times of missed stitches through an LED nixie tube display, and after the device is reset, the initial prompting digit automatically returns to zero.
Furthermore, an InP substrate, an InP buffer layer, an InGaAs photosensitive layer, an InP cap layer, a second electrode, a first electrode and an electrode lead arranged at one end of the second electrode are sequentially stacked in the photoelectric sensor, and the second electrode is a transparent electrode.
Further, the semiconductor device further comprises a passivation layer arranged on the side walls of the InGaAs photosensitive layer and the InP cap layer.
Furthermore, an antireflection layer is disposed on the second electrode for reducing the reflected light of the second electrode and/or the InP cap.
3. The technical effect produced by the invention.
The invention has reasonable structure and convenient installation, automatically realizes missing stitch detection and alarm prompt, and can greatly improve the yield of the computerized flat knitting machine.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention.
Fig. 2 is a schematic view of a photoelectric sensor according to the present invention.
Detailed Description
Example 1
An automatic missing stitch detection alarm device for a computerized flat knitting machine comprises a controller, a position groove, a moving block, a light source emitter and a photoelectric sensor.
The controller is installed on a roller frame of the computerized flat knitting machine, the position groove is embedded into the roller frame and is arranged in parallel with the photoelectric sensor, the moving block is matched with the position groove and can move along the position groove, the light source emitter is arranged on the moving block and is arranged in parallel with the photoelectric sensor and the roller, and the photoelectric sensor is installed on the roller frame, is vertical to the roller frame and is arranged in parallel with the roller.
Example 2
An automatic missing stitch detection alarm device for a computerized flat knitting machine comprises a controller, a position groove, a moving block, a light source emitter and a photoelectric sensor.
The controller comprises a core processor which adopts a digital signal processor and is of a model TMS320f 2812. The controller also comprises a power supply circuit, a storage circuit, a serial communication interface circuit, a digital input circuit, a digital output circuit, a reset button, an LED digital tube display and other peripheral auxiliary circuits.
The controller is connected with a main controller of the computerized flat knitting machine through a serial communication interface circuit, sends missing stitch detection information and alarm prompts to the main controller, receives control signals of the main controller, and starts or stops the device to work. The controller is connected with the photoelectric sensor through a digital input circuit to receive photoelectric sensing signals, and the controller analyzes and processes the signals through a specific algorithm so as to judge whether missing stitches occur. The controller is connected with the light source emitter through the digital output circuit, sends a control signal and starts or stops the light source emitter to work. The controller prompts the times of missed stitches through an LED nixie tube display, and after the device is reset, the initial prompting digit automatically returns to zero.
Example 3
An automatic missing stitch detection alarm device for a computerized flat knitting machine comprises a controller, a position groove, a moving block, a light source emitter and a photoelectric sensor.
The photoelectric sensor is internally sequentially provided with an InP substrate, an InP buffer layer, an InGaAs photosensitive layer, an InP cap layer, a second electrode, a first electrode and an electrode lead arranged at one end of the second electrode in a stacking mode, and the second electrode is a transparent electrode. The semiconductor device also comprises a passivation layer arranged on the side walls of the InGaAs photosensitive layer and the InP cap layer. And the second electrode is also provided with an antireflection layer for reducing the reflected light of the second electrode and/or the InP cap.
The computerized flat knitting machine starts to work, a main controller of the computerized flat knitting machine sends a signal to a controller of the device, the controller starts the device to work and controls a moving block to move to a proper position, a light source emitter emits light to irradiate on the cloth, and a photoelectric sensor collects image signals. If no missing stitch occurs in the cloth, the image signal is analyzed and processed by the controller to be in accordance with a preset range; if the cloth has missed stitches, the image signals are changed, the image signals are analyzed and processed by the controller, the image signals do not conform to the preset range, missed stitch detection information and an alarm prompt are sent to a main controller of the computerized flat knitting machine, and the number of times of missed stitches is increased by one when the LED nixie tube displayer prompts.
Claims (7)
1. A automatic missed stitch detection alarm device for computerized flat knitting machine, its characterized in that: the controller is arranged on a roller frame of the computerized flat knitting machine, the position groove is embedded into the roller frame and is arranged in parallel with the photoelectric sensor, the moving block is matched with the position groove and can move along the position groove, the light source emitter is arranged on the moving block and is arranged in parallel with the photoelectric sensor and the roller, the photoelectric sensor is arranged on the roller frame, is vertical to the roller frame and is arranged in parallel with the roller, the controller also comprises a power circuit, a storage circuit, a serial communication interface circuit, a digital input circuit, a digital output circuit, a reset button and an LED digital tube display, the controller is connected with a main controller of the computerized flat knitting machine through the serial communication interface circuit, sends the missing needle detection information and the alarm prompt to the main controller, and receives the control signal of the main controller, the controller is connected with the photoelectric sensor through a digital input circuit to receive photoelectric sensing signals, and analyzes and processes the photoelectric sensing signals through a specific algorithm so as to judge whether needle leakage occurs.
2. The automatic missing stitch detection alarm device for the computerized flat knitting machine according to claim 1, wherein: the controller comprises a core processor, and a digital signal processor is adopted, and the model is TMS320f 2812.
3. The automatic missing stitch detection alarm device for the computerized flat knitting machine according to claim 1, wherein: the controller is connected with the light source emitter through the digital output circuit, sends a control signal and starts or stops the light source emitter to work.
4. The automatic missing stitch detection alarm device for the computerized flat knitting machine according to claim 1, wherein: the controller prompts the times of missed stitches through an LED nixie tube displayer, and after the device is reset, initial prompt digits automatically return to zero.
5. The automatic missing stitch detection alarm device for the computerized flat knitting machine according to claim 1, wherein: the photoelectric sensor is internally sequentially provided with an InP substrate, an InP buffer layer, an InGaAs photosensitive layer, an InP cap layer, a second electrode, a first electrode and an electrode lead arranged at one end of the second electrode in a stacking mode, and the second electrode is a transparent electrode.
6. The automatic missing stitch detection alarm device for the computerized flat knitting machine according to claim 5, wherein: the semiconductor device also comprises a passivation layer arranged on the side walls of the InGaAs photosensitive layer and the InP cap layer.
7. The automatic missing stitch detection alarm device for the computerized flat knitting machine according to claim 5, wherein: and the second electrode is also provided with an antireflection layer for reducing the reflected light of the second electrode and/or the InP cap layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711334899.0A CN108004673B (en) | 2017-12-14 | 2017-12-14 | Automatic missing stitch detection alarm device for computerized flat knitting machine |
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| CN201711334899.0A CN108004673B (en) | 2017-12-14 | 2017-12-14 | Automatic missing stitch detection alarm device for computerized flat knitting machine |
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| CN108004673B true CN108004673B (en) | 2020-11-03 |
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| US3345835A (en) * | 1964-12-11 | 1967-10-10 | Appalachian Electronic Instr | Retro-reflective stop motion system |
| US5854683A (en) * | 1997-10-24 | 1998-12-29 | Keane; Barry P. | Optical web defect detection system |
| CN101182668A (en) * | 2007-12-13 | 2008-05-21 | 何峰 | Novel |
| CN103469472B (en) * | 2013-09-13 | 2016-03-09 | 中国科学院上海光学精密机械研究所 | Needle of needleloom on-line measuring device and detection method |
| CN206408354U (en) * | 2016-12-09 | 2017-08-15 | 广东华中科技大学工业技术研究院 | A kind of auxiliary drive mechanism of straight-bar machines vision-based detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2224577A1 (en) * | 1972-05-19 | 1973-11-29 | Harrico Developments Ltd | Material fault detection - during prodn by sensor whose output signal is compared with another signal |
| CN2045389U (en) * | 1988-03-04 | 1989-10-04 | 刘元庆 | Photoelectric type detector for leaking sewing of knitting machine |
| DE4001650A1 (en) * | 1989-01-31 | 1990-08-02 | Raz Trikot | Circular knitting machine - has sensor and circuit to identify imperfections in the fabric |
| TW359704B (en) * | 1996-04-26 | 1999-06-01 | China Textile Inst | Method of on-line computer-aided detection for clothes produced by a circular knitting machine |
| CN104101612A (en) * | 2014-06-24 | 2014-10-15 | 杭州利珀科技有限公司 | Plane material surface defect detection device and detection module thereof |
| CN205248286U (en) * | 2015-11-27 | 2016-05-18 | 安徽润尔光电科技有限公司 | Novel photoelectric detector |
| CN107144570A (en) * | 2017-04-28 | 2017-09-08 | 东华大学 | A kind of tufting machine row's yarn error-detecting method based on machine vision |
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