CN111118762A - Sewing machine and thin and thick material detection device thereof - Google Patents
Sewing machine and thin and thick material detection device thereof Download PDFInfo
- Publication number
- CN111118762A CN111118762A CN202010114366.7A CN202010114366A CN111118762A CN 111118762 A CN111118762 A CN 111118762A CN 202010114366 A CN202010114366 A CN 202010114366A CN 111118762 A CN111118762 A CN 111118762A
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- thin
- sewing machine
- processor
- detection device
- thick material
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a sewing machine and a thin and thick material detection device thereof, wherein the thin and thick material detection device comprises a linear grating sheet synchronously linked with a presser foot, a photoelectric switch fixed on a machine head and a processor connected with the photoelectric switch; according to the thin and thick material detection device provided by the invention, the linear grating sheet and the photoelectric switch are utilized to convert the seam material thickness information into the number of pulses, and the thickness of the seam material is judged according to the number of the pulses.
Description
Technical Field
The invention relates to the technical field of sewing machine detection, in particular to a thin and thick material detection device of a sewing machine. In addition, the invention also relates to a sewing machine comprising the thin and thick material detection device.
Background
With the development of the machine manufacturing and electronic information industries, sewing machines are increasingly developing towards automation and intellectualization, and some parameters of the sewing machines need to be automatically adjusted and identified so as to improve the production efficiency.
As the load of the sewing machine, the thickness and the texture of the cloth can directly influence the sewing effect, and especially some high-end machines have strict requirements on front and back seam fixing stitches. At present, the common sewing machine cannot identify the thickness of cloth, an operator needs to observe the thickness of the cloth and manually adjust the sewing speed according to the thickness of the cloth, the operation is complicated, and the judgment of human eyes is unreliable; more advanced sewing machines have cloth thickness detection function, and the detection of the thin and thick materials is realized mainly by using Hall and correlation type sensors, but the detection methods have the problems that output analog signals are easy to interfere, the detection precision is not high, and the like.
Therefore, the method for detecting the thickness of the sewing material with high detection precision and strong anti-interference capability is a technical problem which needs to be solved by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a thin and thick material detection device of a sewing machine, which has high detection precision, high response speed and strong anti-interference capability. Another object of the present invention is to provide a sewing machine including the above thin and thick material detecting device.
In order to solve the above technical problem, the present invention provides a thin and thick material detecting device for a sewing machine, comprising:
a linear grating sheet synchronously linked with the presser foot;
the photoelectric switch is fixed on the machine head and used for detecting the upward displacement of the linear grating sheet when the presser foot is lifted, generating digital pulse signals with different numbers and feeding the digital pulse signals back to the processor;
and the processor is connected with the photoelectric switch and is used for counting the pulse number N of the received digital pulse signal and judging the thickness of the sewing material according to the pulse number N.
Preferably, the processor is electrically connected with a spindle motor of the sewing machine, and the processor is further configured to adjust the rotation speed of the spindle motor according to the pulse number N.
Preferably, when N > NValve with a valve bodyWhen the thickness of the material is thick, the processor controls the spindle motor to rotate by n1Running when N is less than or equal to NValve with a valve bodyWhen the material is thin, the processor controls the spindle motor to rotate by n2Running; wherein N isValve with a valve bodyDetermining a threshold value, n, for a predetermined number of pulses1And n2For a preset spindleMotor speed, 0 < n1＜n2。
Preferably, the digital pulse signal processing device further comprises an operation panel connected with the processor and used for setting a number threshold of the digital pulse signals, and a display screen used for displaying the pulse number N is arranged on the operation panel.
The invention also provides a sewing machine comprising the thin and thick material detection device.
Preferably, the sewing machine is an over-sewing machine, the linear grating sheet is mounted on the presser foot, the sewing machine is a flat sewing machine or a flat sewing machine, and the linear grating sheet is mounted on a linkage mechanism of the presser foot.
The invention provides a thin and thick material detection device of a sewing machine, which comprises a linear grating sheet synchronously linked with a presser foot, a photoelectric switch fixed on a machine head and a processor connected with the photoelectric switch, wherein when the presser foot is lifted, the linear grating sheet is synchronously linked with the presser foot, the photoelectric switch can detect the upward displacement of the linear grating sheet and output different numbers of digital pulse signals to the processor according to the upward displacement, and the processor obtains the pulse number of the digital pulse signals through counting and judges the thin and thick of a sewing material according to the pulse number N; because the thickness of seam material is different, and the distance that the presser foot lifted on the relative platen is different, and the pulse quantity that outputs through photoelectric switch is different, consequently utilizes the pulse quantity that photoelectric switch output can accurate detection seam material's thickness, detects the precision height, and is difficult for receiving other factor interference.
The sewing machine provided by the invention comprises the thin and thick material detection device, and the thin and thick material detection device has the technical effects, so that the sewing machine also has the same technical effects, and the detailed description is omitted.
Drawings
FIG. 1 is a schematic diagram of a thin and thick material detection device according to an embodiment of the present invention;
fig. 2 is a system connection block diagram of an embodiment of the thin and thick material detection apparatus provided in the present invention.
The drawings are numbered as follows:
the device comprises a linear grating sheet 1, a photoelectric switch 2, a processor 3, a spindle motor 4 and an operation panel 5.
Detailed Description
The core of the invention is to provide a thin and thick material detection device of a sewing machine, which has high detection precision, high response speed and strong anti-interference capability. The other core of the invention is to provide a sewing machine comprising the thin and thick material detection device.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of a thin and thick material detection device according to an embodiment of the present invention; fig. 2 is a system connection block diagram of an embodiment of the thin and thick material detection apparatus provided in the present invention.
The invention provides a thin and thick material detection device of a sewing machine, which mainly comprises a linear grating sheet 1, a photoelectric switch 2 and a processor 3 connected with the photoelectric switch 2, wherein the linear grating sheet 1 is fixedly connected with a presser foot, when the presser foot moves, the linear grating sheet 1 can be synchronously linked with the presser foot, the photoelectric switch 2 is fixed on a machine head, when the presser foot is lifted, the photoelectric switch 2 can detect the upward displacement of the linear grating sheet 1 and output different numbers of digital pulse signals to the processor 3 according to the upward displacement, the processor 3 obtains the pulse number of the digital pulse signals through counting, and the thin and thick material is judged according to the pulse number N.
It should be noted that, the combination of the linear grating sheet 1 and the photoelectric switch 2 is equivalent to a grating sensor, and the working principle thereof is to convert the displacement into a pulse signal, one linear grating sheet 1 is provided with a plurality of dense equidistant and parallel scribed lines, the linear grating sheet 1 is placed in the groove-shaped photoelectric switch 2, the moving position of the linear grating sheet 1 is converted into a series of pulse signals through the photoelectric switch 2, the displacement of the linear grating sheet 1 relative to the photoelectric switch 2 is different, and the number of pulses output by the photoelectric switch 2 is different.
The presser foot is a component for applying pressure on the surface of the sewing material on the sewing machine, the thickness of the sewing material is different, the lifting distance of the presser foot relative to the bedplate is different, and the lifting distance of the presser foot relative to the bedplate is the thickness of the sewing material.
When the presser foot is lifted, photoelectric switch 2 is fixed, linear grating piece 1 takes place the synchronous linkage along with the presser foot, to thin material, the distance of lifting on the presser foot is little, linear grating piece 1 is little relative to the displacement that shifts up of photoelectric switch 2, and then the pulse number that photoelectric switch 2 exported is few, to thick material, the distance of lifting on the presser foot is big, linear grating piece 1 is big relative to the displacement that shifts up of photoelectric switch 2, and then the pulse number that photoelectric switch 2 exported is many, consequently, the pulse quantity that photoelectric switch 2 generated can accurately detect the thickness of seam material, it is high to detect the precision, and be difficult for receiving other factor interference.
The smaller the interval between the scribed lines on the linear grating sheet 1 is, the higher the precision is, and specifically, the linear grating sheet 1 with different subdivision precisions can be selected according to the detection precision requirement so as to meet the detection requirement.
It can be understood that, in the thin and thick material detection device of the sewing machine provided by the invention, the installation positions of the linear grating sheet 1 and the photoelectric switch 2 can be interchanged, namely, the linear grating sheet 1 can be fixed on the machine head, and the photoelectric switch 2 is fixedly connected with the presser foot, so that the thin and thick material detection of the sewing material can be realized; however, in practical applications, since the optoelectronic switch needs to be connected to the processor through a signal line, the optoelectronic switch is preferably installed in a fixed position to ensure stable signal transmission.
Furthermore, after the thickness of the sewing material is detected, the needle moving speed of the sewing machine can be adjusted according to whether the sewing material belongs to a thin material or a thick material, and therefore the stitch regularity of sewing is guaranteed.
In order to improve the automation degree of the sewing machine, the thin and thick material detection device provided by the invention can preferably automatically adjust the needle moving speed according to the thickness of the sewing material after detecting the thickness of the sewing material, specifically, the processor 3 is electrically connected with the spindle motor 4 of the sewing machine, and after the processor 3 obtains the pulse number N of the digital pulse signal through counting, the rotating speed of the spindle motor 4 is adjusted according to the pulse number N, so that the needle moving speed is adjusted. As can be appreciated, a processorThe 3 can be the original motor controller on the sewing machine, and the processing program which can process the signal output by the photoelectric switch 2 can be directly written in the motor controller. The rotation speed of the spindle motor 4 is adjusted according to the number of pulses N, and the specific implementation manner thereof is various, and in one embodiment, the material to be sewn can be divided into a thin material and a thick material, and a pulse number judgment threshold N is preset in the program of the processor 3 in advanceValve with a valve bodyAnd two spindle motors 4 rpm n1And n2Wherein 0 < n1＜n2The unit can be r/min, and after the processor 3 obtains the pulse number N of the digital pulse signal through counting, whether N is larger than N is judgedValve with a valve bodyIf N is greater than NValve with a valve bodyIf the sewing material is thick, the processor 3 controls the spindle motor 4 to rotate at the rotating speed n1Running if N is not more than NValve with a valve bodyIf the sewing material is thin, the processor 3 controls the spindle motor 4 to rotate at the speed n2And (5) operating.
Wherein, the application is to NValve with a valve body、n1And n2The specific numerical value of (A) is not limited, and can be adjusted and selected according to factors such as sewing material, sewing requirement and the like.
In actual production, cloth with different thicknesses can be sequentially placed under the presser foot, corresponding pulse number information is acquired through thin materials and thick materials, and the pulse number judgment threshold value N is carried outValve with a valve bodyAnd (4) calibrating to determine the range of the thin and thick materials so as to realize the detection of the thin and thick materials.
Specifically, the pulse number judgment threshold value N may be set through the operation panel 5Valve with a valve bodyThe operation panel 5 is connected with the processor 3, a display screen for displaying the pulse number N is arranged on the operation panel 5, and when the pulse number judgment threshold value is calibrated, the pulse number N corresponding to different cloth materials is displayed in real time through the display screen, so that corresponding operation of workers is facilitated.
Of course, the seam material can be divided into three or more grades according to the thickness of the seam material, and each grade corresponds to one rotating speed and is also within the protection scope of the invention.
In summary, the thin and thick material detection device provided by the invention converts the seam material thickness information into the number of pulses by using the linear grating sheet and the photoelectric switch, and judges the thickness of the seam material according to the number of the pulses.
In addition to the above-mentioned thin and thick material detecting device, a sewing machine including the above-mentioned thin and thick material detecting device is provided in the embodiments of the present invention, and the structure of other parts of the sewing machine refers to the prior art, and is not described herein again.
Specifically, the sewing machine may be a overedger, a flat-bed sewing machine or a flat-seam sewing machine; for the overedger, can directly install straight line grating piece 1 on the presser foot, for flush joint machine or flat seaming machine, receive structural constraint, inconvenient install straight line grating piece 1 on the presser foot, then can install straight line grating piece 1 on the link gear of presser foot.
In the description of the present application, it is to be understood that the terms "upper", "lower", and the like refer to orientations or positional relationships based on those shown in the drawings, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
It should be noted that, in the description, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and similar parts between the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant part can be referred to the method part for description.
The sewing machine and the thin and thick material detection device thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (6)
1. A thin and thick material detection device of a sewing machine is characterized by comprising:
a linear grating sheet (1) synchronously linked with the presser foot;
the photoelectric switch (2) is fixed on the machine head, and the photoelectric switch (2) is used for detecting the upward displacement of the linear grating sheet (1) when the presser foot is lifted, generating digital pulse signals with different numbers and feeding the digital pulse signals back to the processor (3);
and the processor (3) is connected with the photoelectric switch (2) and is used for counting the pulse number N of the received digital pulse signal and judging the thickness of the sewing material according to the pulse number N.
2. The thin and thick material detection device according to claim 1, wherein the processor (3) is electrically connected with a spindle motor (4) of a sewing machine, and the processor (3) is further used for adjusting the rotating speed of the spindle motor (4) according to the pulse number N.
3. The thin and thick material detection device according to claim 2, wherein when N > N, N is greater thanValve with a valve bodyWhen the thickness of the material is thick, the processor (3) controls the spindle motor (4) to rotate by n1Running when N is less than or equal to NValve with a valve bodyWhen the sewing material is thin, the processor (3) controls the spindle motor (4) to rotate by n2Running; wherein N isValve with a valve bodyDetermining a threshold value, n, for a predetermined number of pulses1And n2For the preset rotation speed of the spindle motor (4), n is more than 01＜n2。
4. The thin and thick material detection device according to claim 3, further comprising an operation panel (5) connected to the processor (3) and configured to set a number threshold of the digital pulse signals, wherein a display screen for displaying the number N of pulses is disposed on the operation panel (5).
5. A sewing machine characterized by comprising the thin and thick material detection device according to any one of claims 1 to 4.
6. The sewing machine according to claim 5, characterized in that the sewing machine is an overlock machine, the linear grating sheet (1) is mounted on the presser foot, the sewing machine is a flat sewing machine or a flat sewing machine, and the linear grating sheet (1) is mounted on a linkage mechanism of the presser foot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010114366.7A CN111118762A (en) | 2020-02-24 | 2020-02-24 | Sewing machine and thin and thick material detection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010114366.7A CN111118762A (en) | 2020-02-24 | 2020-02-24 | Sewing machine and thin and thick material detection device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111118762A true CN111118762A (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010114366.7A Pending CN111118762A (en) | 2020-02-24 | 2020-02-24 | Sewing machine and thin and thick material detection device thereof |
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| CN103409952A (en) * | 2013-08-22 | 2013-11-27 | 新杰克缝纫机股份有限公司 | Laser-detection-based industrial sewing machine control system and method |
| CN203393435U (en) * | 2013-07-11 | 2014-01-15 | 温州亿生科技有限公司 | Comprehensive control system of sewing machine |
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2020
- 2020-02-24 CN CN202010114366.7A patent/CN111118762A/en active Pending
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|---|---|---|---|---|
| JPS6355955B2 (en) * | 1980-05-29 | 1988-11-04 | Tsueperu Myubetsuku Yarumyuuesu Konfuekushioipari Jepujara | |
| CN1891887A (en) * | 2005-06-28 | 2007-01-10 | 杜尔克普-阿德勒股份公司 | Sewing machine |
| CN201062315Y (en) * | 2007-06-21 | 2008-05-21 | 深圳市英特曼贸易有限公司 | Press-foot cloth-pressing height regulating mechanism of computerized embroidery machine |
| CN203393435U (en) * | 2013-07-11 | 2014-01-15 | 温州亿生科技有限公司 | Comprehensive control system of sewing machine |
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Application publication date: 20200508 |