CN108225407B - Circular knitting machine needle cylinder detection system and circular knitting machine needle cylinder detection method - Google Patents
Circular knitting machine needle cylinder detection system and circular knitting machine needle cylinder detection method Download PDFInfo
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- CN108225407B CN108225407B CN201611155349.8A CN201611155349A CN108225407B CN 108225407 B CN108225407 B CN 108225407B CN 201611155349 A CN201611155349 A CN 201611155349A CN 108225407 B CN108225407 B CN 108225407B
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention relates to a needle cylinder detection system of a circular knitting machine, which comprises: a rotating part for supporting and rotating the needle cylinder of the circular knitting machine; the image acquisition unit is used for acquiring images of the needle slot of the needle cylinder of the circular knitting machine; an image processing section that obtains a groove width and a groove depth of the needle groove by processing the image acquired by the image acquisition unit; a smoothness detection unit that detects the smoothness of the needle groove; and a determination unit for determining whether the needle groove is acceptable or not based on the groove width and the groove depth of the needle groove obtained by the image processing unit and the smoothness of the needle groove detected by the smoothness detection unit, wherein the rotation unit rotates the cylinder of the circular knitting machine by a corresponding angle based on the groove width of the needle groove obtained by the image processing unit. Therefore, the needle cylinder detection system of the circular knitting machine can realize detection automation and improve detection precision and detection efficiency.
Description
Technical Field
The invention relates to a large circular knitting machine needle cylinder detection system and a large circular knitting machine needle cylinder detection method.
Background
The cylinder of a circular knitting machine is an important component for knitting machines. In the prior art, the detection of the cylinder of the circular knitting machine is realized in a manual (non-automatic) mode. For example, a vernier caliper is adopted to detect the width and the depth of a needle groove of a cylinder of a circular knitting machine; the smoothness of the needle groove of the cylinder of the circular machine is felt only by following the needle. Thus, whether each needle groove of the needle cylinder of the circular knitting machine is qualified or not is judged.
However, the detection accuracy and the detection efficiency are low when the circular knitting machine needle cylinder is detected in a manual mode.
Disclosure of Invention
The present invention is to solve the above problems, and an object of the present invention is to provide a great circle machine cylinder detection system and a great circle machine cylinder detection method that can achieve detection automation and improve detection accuracy and detection efficiency.
In order to achieve the above object, the present invention relates to a cylinder detecting system for a circular knitting machine, including: a rotating part for supporting and rotating the needle cylinder of the circular knitting machine; the image acquisition unit is used for acquiring images of the needle slots of the needle cylinder of the circular knitting machine; an image processing section that obtains a groove width and a groove depth of the needle groove by processing the image acquired by the image acquisition unit; a smoothness detection unit that detects the smoothness of the needle groove; and a determination unit that determines whether or not the needle groove is acceptable based on the groove width and the groove depth of the needle groove obtained by the image processing unit and the smoothness of the needle groove detected by the smoothness detection unit, wherein the rotation unit rotates the cylinder of the circular knitting machine by a corresponding angle based on the groove width of the needle groove obtained by the image processing unit.
In addition, in a cylinder detecting system of a circular knitting machine according to the present invention, the image capturing unit includes: the circular knitting machine comprises a first camera, a second camera, a first sliding table and a second sliding table, wherein the first camera is used for shooting the outer side face of the circular knitting machine needle cylinder, the second camera is used for shooting the upper face or the lower face of the circular knitting machine needle cylinder, the first camera is made to slide along the first radial direction of the circular knitting machine needle cylinder, the first tangential direction and the axial direction which are orthogonal to the first radial direction, and the second camera is made to slide along the second radial direction of the circular knitting machine needle cylinder, the second tangential direction and the axial direction which are orthogonal to the second radial direction.
In addition, in the cylinder detecting system of a circular knitting machine according to the present invention, the rotary unit is an index dial, and the cylinder detecting system of a circular knitting machine further includes: and a position deviation calculation unit that calculates a position deviation value of the needle groove based on the groove width of the needle groove obtained by the image processing unit after the circular knitting machine cylinder is rotated by the index dial, the first and second slide tables causing the first and second cameras to slide in the circumferential direction by the position deviation value calculated by the position deviation calculation unit, respectively.
Further, in a cylinder inspection system of a circular knitting machine according to the present invention, the smoothness inspection unit includes: force transducer, with force transducer connects the needle that sets up and makes force transducer with along the needle along the third radial with the axial and gliding third slip table, the third slip table makes along the needle along third radial sliding inserts follow behind the needle groove axial slip, thereby force transducer is right the resistance that the needle received is detected in the same direction.
In order to achieve the above object, a cylinder detecting method for a circular knitting machine according to the present invention includes: according to the circular knitting machine needle cylinder detection system, the image acquisition process is used for acquiring the image of the needle groove of the circular knitting machine needle cylinder; an image processing step of processing the image acquired in the image acquisition step to obtain a groove width and a groove depth of the needle groove; a smoothness detection step of detecting the smoothness of the needle groove; a determination step of determining whether or not the needle groove is acceptable based on the groove width and the groove depth of the needle groove obtained in the image processing step and the smoothness of the needle groove detected in the smoothness detection step; and a rotation step of rotating the cylinder of the circular knitting machine by a corresponding angle according to the groove width of the needle groove obtained in the image processing step.
According to the circular knitting machine needle cylinder detection system and the circular knitting machine needle cylinder detection method, detection automation can be realized, and detection precision and detection efficiency can be improved.
Drawings
FIG. 1 is a top view of a large circular knitting machine cylinder detection system according to an embodiment of the present invention;
FIG. 2 is a perspective view of a large circular knitting machine cylinder detection system according to an embodiment of the present invention;
FIG. 3 is an enlarged view of area A of FIG. 2;
FIG. 4 is a block line diagram of a large circular knitting machine cylinder detection system according to an embodiment of the present invention;
FIG. 5 is a side view of the cylinder of the circular knitting machine taken by the first camera;
FIG. 6 is a bottom view of the cylinder of the circular knitting machine taken by the second camera;
FIG. 7 is a schematic view of a down needle insertion slot;
FIG. 8 is a schematic view of the needle sliding within the needle slot;
fig. 9 is a flowchart of a method for detecting a cylinder of a circular knitting machine according to an embodiment of the present invention.
Detailed Description
Hereinafter, a cylinder checking system and a cylinder checking method according to an embodiment of the present invention will be described in detail with reference to the drawings.
Needle cylinder detection system of circular knitting machine
The configuration of the cylinder checking system 100 according to the embodiment of the present invention will be described in detail with reference to fig. 1 to 8.
As shown in fig. 1 to 6, a cylinder detection system 100 of a circular knitting machine according to an embodiment of the present invention includes: a rotating part 2 for supporting and rotating the cylinder 1 of the circular knitting machine; the image acquisition unit 3 is used for acquiring images of the needle groove 11 of the needle cylinder 1 of the circular knitting machine; an image processing section 4 for processing the image acquired by the image acquisition unit 3 to obtain a groove width W and a groove depth D of the needle groove 11; a smoothness detection unit 5 that detects the smoothness of the needle groove 11; and a judgment unit 6 for judging whether or not the needle groove 11 is acceptable based on the groove width W and the groove depth D of the needle groove 11 obtained by the image processing unit 4 and the smoothness of the needle groove 11 detected by the smoothness detection unit 5.
The rotor 2 supports the circular knitting machine cylinder 1 from the inside (inner periphery) of the circular knitting machine cylinder 1. Further, the rotating section 2 is an index dial, and includes: a base 21, a rotatable shaft 22 provided on the base 21, and a holder 23 which abuts the inside of the cylinder 1 and supports the cylinder 1. The rotating shaft 22 is connected to a motor, not shown, and is rotated by driving of the motor. A bracket 23 is provided at one end (upper end) of the rotary shaft 22. The holder 23 is composed of a plurality of (three) support rods 231 extending in the radial direction and screws 232. One end (base end) of the support rod 231 is fixedly connected to one end (upper end) of the rotary shaft 22, and a screw 232 is screwed to the other end (tip end). The support is achieved by pressing the tip of the screw 232 against the inside of the cylinder 1 of the circular knitting machine. And, the supporting of the great circular knitting machine needle cylinder with different diameters is realized by adjusting the screw 232.
The image pickup unit 3 includes: the circular knitting machine comprises a first camera 31 for shooting the outer side surface of the circular knitting machine cylinder 1, a second camera 32 for shooting the upper surface or the lower surface of the circular knitting machine cylinder 1, a first sliding table 33 for sliding the first camera 31 along the radial direction of the circular knitting machine cylinder 1 and the tangential direction orthogonal to the radial direction, and a second sliding table 34 for sliding the second camera along the axial direction and the tangential direction of the circular knitting machine cylinder 1. In the present embodiment, since the opening of the needle groove 11 faces downward, the second camera 32 is provided on the lower surface of the circular knitting machine cylinder 1 in accordance with this, and photographs the lower surface of the circular knitting machine cylinder 1.
The first slide table 33 includes: a first fixed guide 331, a first slide guide 332, a second slide guide 333, and a first slider 334. Wherein the first stationary guide 331 extends in a first tangential direction orthogonal to the first radial direction. The first slide guide 332 is engaged with the first fixed guide 331 so as to be slidable (movable) in a first tangential direction. Further, the first sliding guide 332 extends in the first radial direction. The second slide guide 333 is engaged with the first slide guide 332 so as to be slidable (movable) in the first radial direction. The first slider 334 is engaged with the second slide guide 333 so as to be slidable (movable) in the axial direction, and is fixedly connected to the first camera 31. Further, the first slide table 33 further includes: and a motor (not shown) for sliding the first slide guide 332, the second slide guide 333, and the first slider 334. The first slide guide 332 is slid in the first tangential direction by driving of the first slide guide motor, so that positional deviation adjustment of the first camera 31, which will be described later, is performed. The second slide guide 333 is slid in the first radial direction by the driving of the second slide guide motor, so that the focusing of the first camera 31 is achieved. The first slider 334 is driven by the motor to slide along the axial direction, so that the large circular knitting machine needle cylinders with different sizes can be shot.
The second slide table 34 includes: a second fixed guide 341, a third sliding guide 342, a fourth sliding guide 343, and a second slider 344. Wherein the second stationary guide 341 extends in a second tangential direction orthogonal to the second radial direction. The third sliding guide 342 is engaged with the second fixed guide 341 in such a manner as to be slidable (movable) in the second tangential direction. Further, the third slide guide 342 extends in the axial direction. The fourth slide guide 343 is engaged with the third slide guide 342 so as to be slidable (movable) in the second radial direction. The second slider 344 is engaged with the fourth slide guide 343 so as to be slidable (movable) in the axial direction, and is fixedly connected to the first camera 31. Further, the second slide table 34 further includes: and a motor (not shown) for sliding the third slide guide 342, the fourth slide guide 343, and the second slider 344. The third slide guide 342 is slid in the second tangential direction by the driving of the third slide guide motor, so that the positional deviation adjustment of the second camera 32, which will be described later, is performed. The fourth sliding guide rod 343 is driven by the motor to slide along the second radial direction, so that the large circular knitting machine cylinders with different sizes can be photographed. The second slider 344 is slid in the axial direction by the driving of the second slider with the motor, so that the focusing of the second camera 32 is achieved.
The image processing unit 4 processes the side surface image captured by the first camera 31 to obtain the groove width W of the needle groove 11. For example, the groove width W of the needle groove 11 may be an average groove width of the needle groove 11. Further, the image processing section 4 processes the lower surface image captured by the second camera 32 to obtain the depth D of the needle groove 11.
The smoothness detection unit 5 includes: a force sensor 51, a needle 52 connected to the force sensor 51, and a third slide table 53 for sliding the force sensor 51 and the needle 52 in a third radial direction and an axial direction.
The third slide table 53 includes: a third fixed guide 531, a fifth slide guide 532, and a third slider 533. Wherein the third stationary guide 531 extends in the axial direction. The fifth slide guide 532 is engaged with the third fixed guide 531 so as to be slidable (movable) in the axial direction. Further, a fifth sliding guide 532 extends in a third radial direction. The third slider 533 is engaged with the fifth slide guide 532 so as to be slidable (movable) in the third radial direction, and is fixedly connected to the force sensor 51. Further, the third slide table 53 further includes: and a motor (not shown) for sliding the fifth slide guide 532 and the third slider 533. The third slider 533 is slid in the third radial direction by the driving of the third slider motor, so that the needle 52 is inserted into the needle groove 11 (see fig. 7). The fifth slide guide 532 is driven by the third slide guide motor to slide in the axial direction, so that the force sensor 51 detects the resistance applied to the needle 52 (see fig. 8). Therefore, the third sliding table 53 enables the needle guiding 52 to slide along the axial direction after being inserted into the needle groove 11 in the third radial direction, so that the force sensor 51 can detect the resistance (smoothness) borne by the needle guiding 52. In the present embodiment, the resistance applied to the needle 52 is preferably the maximum resistance applied to the needle 52. Of course, the resistance force applied to the needle 52 may be the average resistance force applied to the needle 52.
The judgment unit 6 judges whether or not the needle groove 11 is acceptable based on the groove width W and the groove depth D of the needle groove 11 obtained by the image processing unit 4 and the smoothness of the needle groove 11 detected by the smoothness detection means 5. Specifically, the judgment section 6 compares the groove width W, the groove depth D, and the smoothness of the groove 11 with the acceptable groove width range, the acceptable groove depth range, and the acceptable smoothness range set in advance, and judges the groove 11 as defective as long as one of the parameters of the groove width W, the groove depth D, and the smoothness of the groove 11 is not within the acceptable range; when the groove width W, the groove depth D, and the smoothness of the needle groove 11 are within the above-described acceptable ranges, the needle groove 11 is determined to be acceptable. The great circle machine cylinder detecting system 100 further includes a pass range setting unit (not shown) that is set so that a pass groove width range, a pass groove depth range, and a pass smoothness range can be changed according to different specifications of great circle machine cylinders.
The cylinder checking system 100 according to the embodiment of the present invention further includes an angle calculating unit 7. The angle calculating unit 7 calculates an angle corresponding to the needle groove 11 based on the diameter or radius of the cylinder 1 of the circular knitting machine input (set) in advance and the groove width W of the needle groove 11 obtained by the image processing unit 4.
After the judgment unit 6 has finished judging whether or not the needle groove 11 is acceptable, the rotation unit 2 rotates the circular knitting machine cylinder 1 by a corresponding angle based on the groove width W of the needle groove 11 obtained by the image processing unit 4. Specifically, the rotating unit 2 rotates the cylinder 1 by the angle calculated by the angle calculating unit 7.
In addition, since the rotary part 2 is an index dial in the present embodiment, the rotary part 2 may not rotate the cylinder 1 by a precise angle corresponding thereto, and a positional deviation of the needle groove 11 may occur. When the rotary unit 2 employs an index dial, the cylinder detection system 100 according to the embodiment of the present invention further includes a positional deviation calculation unit 8. After the circular knitting machine cylinder 1 is rotated by the rotating unit 2 (index dial), the positional deviation calculating unit 8 calculates a positional deviation value of the needle groove 11 based on the groove width W of the needle groove 11 obtained by the image processing unit 4. Specifically, after the circular knitting machine cylinder 1 is rotated by the rotating unit 2 (index dial), the positional deviation calculating unit 8 calculates a positional deviation value from a deviation angle generated after the circular knitting machine cylinder 1 is rotated and a diameter or a radius of the circular knitting machine cylinder 1 input (set) in advance.
The first slide table 33 slides the first camera 31 along the first tangential direction by the positional deviation value calculated by the positional deviation calculation section 8. Similarly, the second slide table 34 slides the second imaging section 32 along the second tangential direction by the positional deviation value calculated by the positional deviation calculation section 8. Thereby, an automatic accurate positioning of each needle groove by the first camera 31 and the second camera 32 is achieved.
Next, the next needle groove 11 is detected. After the detection of all the needle grooves 11 is completed, the yield of the needle grooves 11 is counted. Thus, according to the circular knitting machine cylinder detection system 100 according to the embodiment of the present invention, detection automation can be achieved, and detection accuracy and detection efficiency can be improved.
Method for detecting needle cylinder of circular knitting machine
As shown in fig. 9, the method for detecting a cylinder of a circular knitting machine according to the embodiment of the present invention includes: an image acquisition step S101 for acquiring an image of the needle groove 11 of the cylinder 1 of the circular knitting machine; an image processing step S102 of obtaining the groove width and the groove depth of the needle groove 11 by processing the image acquired in the image acquisition step S101; a smoothness detection step S103 of detecting the smoothness of the needle groove; a determination step S104 of determining whether or not the needle groove 11 is acceptable based on the groove width and the groove depth of the needle groove 11 obtained in the image processing step S102 and the needle groove smoothness detected in the smoothness detection step S103. After the determination step S104 is completed, the circular knitting machine cylinder 1 is rotated by a corresponding angle according to the groove width of the needle groove 11 obtained in the image processing step S102.
The image capturing step S101, the image processing step S102, the smoothness detecting step S103, and the judging step S104 of the method for inspecting a cylinder of a circular knitting machine are realized by the image capturing unit 3, the image processing unit 4, the smoothness detecting unit 5, and the judging unit 6 of the system 100 for inspecting a cylinder of a circular knitting machine, respectively. Furthermore, the rotation of the cylinder 1 of the circular knitting machine is effected by the rotor 2. Thus, according to the method for detecting a cylinder of a circular knitting machine according to the embodiment of the present invention, detection automation can be achieved, and detection accuracy and detection efficiency can be improved.
Claims (3)
1. The big circular knitting machine needle cylinder detection system is characterized by comprising:
a rotating part for supporting and rotating the needle cylinder of the circular knitting machine;
the image acquisition unit is used for acquiring images of the needle slots of the needle cylinder of the circular knitting machine; wherein the image acquisition unit comprises: the circular knitting machine comprises a first camera for shooting the outer side surface of the circular knitting machine needle cylinder, a second camera for shooting the upper surface or the lower surface of the circular knitting machine needle cylinder, a first sliding table for enabling the first camera to slide along a first radial direction of the circular knitting machine needle cylinder, a first tangential direction orthogonal to the first radial direction and an axial direction, and a second sliding table for enabling the second camera to slide along a second radial direction of the circular knitting machine needle cylinder, a second tangential direction orthogonal to the second radial direction and the axial direction;
an image processing section that obtains a groove width and a groove depth of the needle groove by processing the image acquired by the image acquisition unit;
a smoothness detection unit that detects the smoothness of the needle groove;
a determination unit that determines whether or not the needle groove is acceptable based on the groove width and the groove depth of the needle groove obtained by the image processing unit and the smoothness of the needle groove detected by the smoothness detection unit,
the rotating part rotates the needle cylinder of the circular knitting machine by a corresponding angle according to the groove width of the needle groove obtained by the image processing part;
wherein, the rotation part is indexing type carousel, big circular knitting machine syringe detecting system still includes: and a position deviation calculation unit that calculates a position deviation value of the needle groove based on the groove width of the needle groove obtained by the image processing unit after the circular knitting machine cylinder is rotated by the index dial, wherein the first and second slide tables slide the first and second cameras in a circumferential direction, respectively, by the position deviation value calculated by the position deviation calculation unit.
2. The great circle machine syringe detection system of claim 1,
the smoothness detection unit includes: the force sensor, the needle and the third sliding table make the force sensor and the needle slide along a third radial direction and the axial direction,
the third sliding table enables the clockwise needle to be inserted into the needle groove in a sliding mode in the third radial direction and then slides in the axial direction, and therefore the force sensor detects resistance borne by the clockwise needle.
3. A method for detecting a cylinder of a circular knitting machine, which is performed by the system for detecting a cylinder of a circular knitting machine according to any one of claims 1 to 2, and comprises the steps of:
an image acquisition step of acquiring an image of a needle groove of a needle cylinder of a circular knitting machine;
an image processing step of processing the image acquired in the image acquisition step to obtain a groove width and a groove depth of the needle groove;
a smoothness detection step of detecting the smoothness of the needle groove;
a determination step of determining whether or not the needle groove is acceptable based on the groove width and the groove depth of the needle groove obtained in the image processing step and the smoothness of the needle groove detected in the smoothness detection step;
after the judgment step is completed, the cylinder of the circular knitting machine is rotated by a corresponding angle according to the groove width of the needle groove obtained in the image processing step.
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| CN201611155349.8A CN108225407B (en) | 2016-12-14 | 2016-12-14 | Circular knitting machine needle cylinder detection system and circular knitting machine needle cylinder detection method |
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| CN1898033A (en) * | 2003-12-30 | 2007-01-17 | 赞鸿制造业私人有限公司 | Fastener inspection system |
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