CN106841235B - Image extraction device and image imaging method based on machine vision fabric weaving flower-shaped pattern - Google Patents
Image extraction device and image imaging method based on machine vision fabric weaving flower-shaped pattern Download PDFInfo
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- CN106841235B CN106841235B CN201710082062.5A CN201710082062A CN106841235B CN 106841235 B CN106841235 B CN 106841235B CN 201710082062 A CN201710082062 A CN 201710082062A CN 106841235 B CN106841235 B CN 106841235B
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
Abstract
the invention relates to an image extraction device and an image imaging method based on machine vision fabric weaving flower-shaped patterns, which comprises the following steps: the fabric with weaving flower-shaped patterns is used as a measured object; the linear array camera is used for acquiring the imaging of the weaving flower-shaped pattern; the image processor is used for receiving and processing the image signal output by the linear array camera; a light source for polishing the fabric; because the fabric weaving flower-shaped pattern floats on the fabric surface, the optical axis of the linear light source and the optical axis of the linear array camera need to intersect above the fabric surface; and respectively adjusting the optical axis of the light source, the optical axis of a lens of the linear array camera and the included angle between the optical axis and the plane of the fabric according to the concave-convex degree of the pattern formed by floating on the front surface of the fabric, thereby completing the image extraction of the fabric weaving pattern. The invention extracts clear images and provides good conditions for subsequent accurate image acquisition and software operation processing.
Description
Technical Field
The invention particularly relates to an image extraction device and an image imaging method based on machine vision fabric weaving flower-shaped patterns, and belongs to the technical field of textile printing and dyeing equipment.
background
The fabric with weaving flower shape is commonly called jacquard in the industry, namely, warp yarns or weft yarns (warp knitting yarns or weft knitting yarns) are woven into a flower shape pattern with a raised three-dimensional shape on the fabric in an intricate manner during weaving, and the fabric woven by the method is called the jacquard. In the finishing process of the jacquard fabric after printing and dyeing, the tension is uneven, the weft yarn of the fabric is easy to deform and is often called as bias weft, so that the weaving pattern of the fabric can generate bias displacement in the width direction, the quality of finished fabrics is directly influenced, and the bias index of the fabric is increasingly emphasized. The traditional method for detecting the fabric skewness adopts a photoelectric transmission type detection mode, namely, a plurality of groups of light sources and detection elements, namely integrated silicon photocells are respectively arranged on two sides of the fabric, parallel light emitted by the light sources uniformly penetrates through the fabric to be detected, an image of a fabric weft is imaged on the integrated silicon photocells through an optical system, when the form of the weft changes, the integrated silicon photocells output signals change, and the signals are processed and converted to obtain the weft deformation angle value.
when a photoelectric transmission type detection mode is adopted, for the area where the area of the woven flower-shaped pattern is larger than the working area of an integrated silicon photocell of a certain group of detection elements, the photoelectric transmission type detection mode can only obtain the inherent intricate weft yarn shape of the flower-shaped pattern, and can not judge the positive and true weft yarn deformation angle value of the fabric in the width direction; for heavy fabrics, parallel light emitted by a light source cannot penetrate through the fabric to be detected at all, and photoelectric transmission type detection cannot work. The weft yarn deformation angle value of the heavy fabric cannot be detected. This has greatly limited the application of the photoelectric transmission detection method and has not been solved well.
Disclosure of Invention
the invention aims to provide an image extraction device and an image imaging method for extracting clear images of fabric weaving flower patterns and providing good conditions for accurate acquisition of subsequent images and operation processing of software, and aims to overcome the defects of the prior art.
in order to achieve the above object, a first technical solution of the present invention is: an image extraction device based on machine vision fabric weaving flower patterns, comprising:
The fabric with weaving flower-shaped patterns is used as a measured object;
the linear array camera is used for acquiring the imaging of the weaving flower-shaped pattern;
the first cloth guide piece and the second cloth guide piece are used for guiding the running of the fabric;
the image processor is used for receiving and processing image signals output by the linear array camera, and is electrically connected with the linear array camera or connected with an optical fiber;
a light source for polishing the fabric;
the camera collimation mechanism is used for adjusting an included angle between a lens optical axis m of the linear array camera and a fabric plane or adjusting an included angle between the lens optical axis m of the linear array camera and a light source optical axis n of a light source;
the light source collimation mechanism is used for adjusting an included angle between a light source light axis n of the light source and a lens light axis m of the linear array camera or adjusting an included angle between the light source light axis n of the light source and a fabric plane;
the linear array camera is fixedly connected with the camera collimation mechanism;
the camera collimation mechanism is fixedly connected with the frame;
The light source is fixedly connected with the light source collimation mechanism;
the light source collimation mechanism is fixedly connected with the frame;
the innovation points are as follows: the linear array camera and the light source are arranged on the same side of the fabric between the first fabric guide piece and the second fabric guide piece and are arranged along the moving direction V of the fabric plane in sequence or in reverse sequence, and the optical axis m of the lens of the linear array camera is intersected with the optical axis n of the light source above the surface of the fabric;
when the sequences are arranged in sequence: the intersection point of the lens light axis m of the linear array camera and the light source light axis n of the light source above the surface of the fabric is point O,
the included angle alpha between the lens optical axis m of the linear array camera and the moving direction V of the fabric plane is 5 degrees ~ 85 degrees,
the included angle beta between the light source light axis n of the light source and the lens light axis m of the linear array camera is 5 degrees ~ 85 degrees,
the included angle alpha and the included angle beta are in the same first plane, the first plane is perpendicular to the fabric plane, and the moving direction V of the first plane and the fabric plane is parallel;
when the sequences are arranged in the reverse order: the intersection point of the lens light axis m of the linear array camera and the light source light axis n of the light source above the surface of the fabric is a point O',
the included angle alpha' between the light source light axis n of the light source and the moving direction V of the fabric plane is 5 degrees ~ 85 degrees,
the included angle beta' between the lens optical axis m of the linear array camera and the light source optical axis n of the light source is 5 degrees ~ 85 degrees,
the angle α 'and the angle β' are in the same second plane, which is perpendicular to the plane of the fabric and which is parallel to the direction of movement V of the plane of the fabric.
In the first technical solution, the light source is a white light source.
in the first technical solution, the line camera is a color camera or a monochrome camera.
in order to achieve the above object, a second technical solution of the present invention is: the image imaging method based on the machine vision fabric weaving flower-shaped pattern adopts the image extraction device based on the machine vision fabric weaving flower-shaped pattern, and is characterized by comprising the following steps of:
a. under the condition that the linear array camera and the light source are arranged on the same side of the fabric between the first fabric guide part and the second fabric guide part and are sequentially arranged along the moving direction V of the fabric plane:
when the fabric starts to run between the first and second guides in the direction of movement V of the plane of the fabric,
adjusting a camera collimation mechanism to enable an included angle alpha between a lens optical axis m of the linear array camera and the moving direction V of the fabric plane to be 5 degrees ~ 85 degrees;
adjusting a light source collimation mechanism to enable an included angle beta between a light source optical axis n of a light source and a lens optical axis m of the linear array camera to be 5 degrees ~ 85 degrees;
adjusting the camera collimation mechanism and the light source collimation mechanism to enable a lens light axis m of the linear array camera to be intersected with a light source light axis n of the light source (3) above the surface of the fabric;
starting the image processor and continuously receiving the flower pattern images output by the linear array camera;
Fine-tuning the light source collimation mechanism to ensure that the image processed by the image processor has the maximum contrast;
Fine-tuning the camera collimation mechanism to make the image processed by the image processor have maximum definition;
seventhly, fine adjustment is carried out on the light source collimation mechanism and the camera collimation mechanism, so that the gray value calculated by the image processor meets the requirement of extracting the weft yarn deformation angle value;
b. under the condition that the linear array camera and the light source are arranged on the same side of the fabric between the first fabric guide part and the second fabric guide part and are arranged along the moving direction V of the fabric plane in a reverse order:
when the fabric starts to run between the first and second guides in the direction of movement V of the plane of the fabric,
adjusting a light source collimation mechanism to enable an included angle alpha' between a light source light axis n of a light source and the moving direction V of the fabric plane to be 5 degrees ~ 85 degrees;
adjusting a camera collimation mechanism to enable an included angle beta' between a lens optical axis m of the linear array camera and a light source optical axis n of a light source to be 5 degrees ~ 85 degrees;
Adjusting the light source collimation mechanism and the camera collimation mechanism to enable a light source light axis n of the light source and a lens light axis m of the linear array camera to intersect with the upper side of the surface of the fabric;
starting the image processor and continuously receiving the flower pattern images output by the linear array camera;
fine-tuning the light source collimation mechanism to ensure that the image processed by the image processor has the maximum contrast;
Fine-tuning the camera collimation mechanism to make the image processed by the image processor have maximum definition;
and seventhly, fine adjustment is performed on the light source alignment mechanism and the camera alignment mechanism, so that the gray value calculated by the image processor meets the requirement of extracting the weft deformation angle value.
the invention has the positive effects that: after the image extraction device for weaving the flower-shaped patterns on the basis of the machine vision fabric is adopted, clear images are extracted, and good conditions are provided for accurate acquisition of subsequent images and operation processing of software. After the image imaging method of weaving the flower-shaped patterns on the basis of the machine vision fabric is adopted, the flower-shaped patterns woven on the fabric float on the surface of the fabric, so that the optical axis of the light source and the optical axis of the lens of the linear array camera are required to be superposed (intersected) on the surface of the fabric; still need respectively according to the unsmooth degree that floats in the positive constitution decorative pattern of fabric, adjust the camera lens optical axis of linear array camera and the contained angle between the light source light axis of light source respectively and the fabric respectively, here, still need to guarantee the optical axis of linear array camera and the lens optical axis of light source and intersect on the fabric surface, only so can obtain the image of gathering and not have the shadow, no dead angle, the image edge is clear.
drawings
FIG. 1 is a schematic structural view of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Detailed Description
the invention is further illustrated, but not limited, by the following examples in connection with the accompanying drawings.
Example 1
as shown in fig. 1, an image extracting apparatus for weaving a flower pattern based on a machine vision fabric includes:
the fabric 1 with the weaving flower-shaped pattern is used as a measured object;
the linear array camera 2 is used for acquiring the imaging of the weaving flower-shaped pattern;
a first cloth guide 6 and a second cloth guide 9 for guiding the running of the fabric 1;
The image processor 7 is used for receiving and processing the image signals output by the line camera 2, and the image processor 7 is electrically connected with the line camera 2 or connected with an optical fiber;
a light source 3 for polishing the fabric 1;
a camera collimation mechanism 4 for adjusting the included angle alpha between the lens optical axis m of the linear array camera 2 and the plane of the fabric 1
the light source collimation mechanism 5 is used for adjusting an included angle beta between a light source light axis n of the light source 3 and a lens light axis m of the linear array camera 2;
the linear array camera 2 is fixedly connected with the camera collimation mechanism 4;
the camera collimation mechanism 4 is fixedly connected with the frame 8;
the light source 3 is fixedly connected with the light source collimation mechanism 5;
the light source collimation mechanism 5 is fixedly connected with the frame 8;
the linear array camera 2 and the light source 3 are arranged on the same side of the fabric 1 between the first fabric guide 6 and the second fabric guide 9 and are arranged along the moving direction V of the plane of the fabric 1 in sequence or in reverse sequence, and the optical axis m of the lens of the linear array camera 2 is intersected with the optical axis n of the light source 3 above the surface of the fabric 1;
when arranged in the order of fig. 1: the intersection point of the lens light axis m of the linear array camera 2 and the light source light axis n of the light source 3 intersecting above the surface of the fabric 1 is point O,
the included angle alpha between the lens optical axis m of the linear array camera 2 and the moving direction V of the plane of the fabric 1 is 5 degrees ~ 85 degrees,
the included angle beta between the light source light axis n of the light source 3 and the lens light axis m of the linear array camera 2 is 5 degrees ~ 85 degrees,
The angle α and the angle β are in the same first plane, which is perpendicular to the plane of the fabric 1 and parallel to the direction of movement V of the plane of the fabric 1.
In the image extraction device based on the machine vision fabric weaving flower-shaped pattern, the light source 3 adopts a white light source.
The line camera 2 is a color camera or a monochrome camera.
example 2
as shown in fig. 2, an image extracting apparatus for weaving a flower pattern based on a machine vision fabric includes:
The fabric 1 with the weaving flower-shaped pattern is used as a measured object;
the linear array camera 2 is used for acquiring the imaging of the weaving flower-shaped pattern;
A first cloth guide 6 and a second cloth guide 9 for guiding the running of the fabric 1;
the image processor 7 is used for receiving and processing the image signals output by the line camera 2, and the image processor 7 is electrically connected with the line camera 2 or connected with an optical fiber;
a light source 3 for polishing the fabric 1;
the camera collimation mechanism 4 is used for adjusting an angle included angle beta' between a lens optical axis m of the linear array camera 2 and a light source optical axis n of the light source 3;
the light source collimation mechanism 5 is used for adjusting an included angle alpha' between a light source light axis n of the light source 3 and the plane of the fabric 1;
The linear array camera 2 is fixedly connected with the camera collimation mechanism 4;
the camera collimation mechanism 4 is fixedly connected with the frame 8;
The light source 3 is fixedly connected with the light source collimation mechanism 5;
the light source collimation mechanism 5 is fixedly connected with the frame 8;
the linear array camera 2 and the light source 3 are arranged on the same side of the fabric 1 between the first fabric guide 6 and the second fabric guide 9 and are arranged along the moving direction V of the plane of the fabric 1 in sequence or in reverse sequence, and the optical axis m of the lens of the linear array camera 2 is intersected with the optical axis n of the light source 3 above the surface of the fabric 1;
When arranged in reverse order in fig. 2: the intersection point of the lens light axis m of the line camera 2 and the light source light axis n of the light source 3 intersecting above the surface of the fabric 1 is the point O',
the included angle alpha' between the light source light axis n of the light source 3 and the moving direction V of the plane of the fabric 1 is 5-85 degrees,
the included angle beta' between the lens optical axis m of the linear array camera 2 and the light source optical axis n of the light source 3 is 5 degrees ~ 85 degrees,
the angle α 'is in the same second plane as the angle β', which is perpendicular to the plane of the fabric 1 and parallel to the direction of movement V of the plane of the fabric 1.
in the image extraction device based on the machine vision fabric weaving flower-shaped pattern, the light source 3 adopts a white light source.
the line camera 2 is a color camera or a monochrome camera.
example 3
as shown in fig. 1, an image imaging method based on machine vision fabric weaving flower pattern, which uses the image extraction device based on machine vision fabric weaving flower pattern as above, includes the following steps:
under the condition that the line camera 2 and the light source 3 are arranged on the same side of the fabric 1 between the first fabric guide 6 and the second fabric guide 9 and are sequentially arranged along the moving direction V of the plane of the fabric 1:
when the fabric 1 starts running between the first cloth guide 6 and the second cloth guide 9 in the direction of movement V in the plane of the fabric 1,
adjusting a camera collimation mechanism 4 to enable an included angle alpha between a lens optical axis m of the linear array camera 2 and the moving direction V of the plane of the fabric 1 to be 5 degrees ~ 85 degrees;
adjusting a light source collimation mechanism 5 to enable an included angle beta between a light source light axis n of a light source 3 and a lens light axis m of the linear array camera 2 to be 5 degrees ~ 85 degrees;
adjusting the camera collimation mechanism 4 and the light source collimation mechanism 5 to enable a lens light axis m of the linear array camera 2 and a light source light axis n of the light source 3 to intersect above the surface of the fabric 1;
starting the image processor 7 and continuously connecting the flower-shaped pattern images output by the linear array camera 2;
fine-tuning the light source collimation mechanism 5 to ensure that the image processed by the image processor 7 has the maximum contrast;
fine-tuning the camera collimation mechanism 4 to make the image processed by the image processor 7 have maximum definition;
and seventhly, fine adjustment is performed on the light source collimation mechanism 5 and the camera collimation mechanism 4, so that the gray value calculated by the image processor 7 meets the requirement of extracting the weft deformation angle value.
Example 4
as shown in fig. 2, an image imaging method based on machine vision fabric weaving flower pattern, which uses the image extraction device based on machine vision fabric weaving flower pattern as above, includes the following steps:
Under the condition that the line camera 2 and the light source 3 are arranged on the same side of the fabric 1 between the first fabric guide 6 and the second fabric guide 9 and are arranged along the moving direction V of the plane of the fabric 1 in a reverse order:
when the fabric 1 starts running between the first cloth guide 6 and the second cloth guide 9 in the direction of movement V in the plane of the fabric 1,
adjusting the light source collimation mechanism 5 to enable an included angle alpha' between a light source light axis n of the light source 3 and the moving direction V of the plane of the fabric 1 to be 5 degrees ~ 85 degrees;
adjusting a camera collimation mechanism 4 to enable an included angle beta' between a lens optical axis m of the linear array camera 2 and a light source optical axis n of the light source 3 to be 5 degrees ~ 85 degrees;
adjusting the light source collimation mechanism 5 and the camera collimation mechanism 4 to enable a light source light axis n of the light source 3 and a lens light axis m of the linear array camera 2 to intersect with the upper part of the surface of the fabric 1;
starting the image processor 7 and continuously connecting the flower-shaped pattern images output by the linear array camera 2;
fine-tuning the light source collimation mechanism 5 to ensure that the image processed by the image processor 7 has the maximum contrast;
Fine-tuning the camera collimation mechanism 4 to make the image processed by the image processor 7 have maximum definition;
and seventhly, fine adjustment is performed on the light source collimation mechanism 5 and the camera collimation mechanism 4, so that the gray value calculated by the image processor 7 meets the requirement of extracting the weft deformation angle value.
the first cloth guide 6 and the second cloth guide 9 can be cloth guide rollers, cloth guide rods or cloth guide plates.
The working process of the invention is as follows: when the fabric 1 with the weaving flower-shaped patterns moves between the first fabric guide 6 and the second fabric guide 9, machine vision is adopted to collect the weaving patterns floating on the front surface of the fabric, and the weaving flower-shaped patterns of the fabric float on the surface of the fabric, so that the optical axis of the linear light source and the optical axis of the linear array camera have intersection above the surface of the fabric; still according to the unsmooth degree that floats in the positive constitution decorative pattern of fabric, adjust camera collimation mechanism and light source collimation mechanism respectively, promptly: adjusting an included angle alpha between a lens optical axis m of the linear array camera and a fabric plane, adjusting an included angle beta between a light source optical axis n of the light source and the lens optical axis m of the linear array camera, or adjusting an included angle alpha 'between a light source optical axis n of the light source and the fabric plane and adjusting an angle included angle beta' between the lens optical axis m of the linear array camera and the light source optical axis n of the light source.
here, it still needs to be ensured that the light axis of the light source of the linear light source and the light axis of the lens of the linear camera intersect above the surface of the fabric, and only then, the acquired image is free of shadow, dead angle and clear in image edge.
in summary, the image extraction device for weaving the flower-shaped pattern on the basis of the machine vision fabric completes the image extraction of the flower-shaped pattern woven on the fabric by changing the included angle between the optical axis of the linear light source and the optical axis of the lens of the linear array camera and the fabric plane and ensuring the intersection of the optical axis of the light source of the linear light source and the optical axis of the lens of the linear array camera above the fabric surface, thereby providing good conditions for the accurate acquisition of subsequent images and the operational processing of software.
Claims (4)
1. an image extraction device based on machine vision fabric weaving flower patterns, comprising:
The fabric (1) with the weaving flower-shaped pattern is used as a measured object;
the linear array camera (2) is used for acquiring the imaging of the weaving flower-shaped pattern;
a first cloth guide (6) and a second cloth guide (9) for guiding the running of the fabric (1);
the image processor (7) is used for receiving and processing image signals output by the linear array camera (2), and the image processor (7) is electrically connected with the linear array camera (2) or connected with an optical fiber;
a light source (3) for polishing the fabric (1);
the camera collimation mechanism (4) is used for adjusting an included angle between a lens optical axis m of the linear array camera (2) and the plane of the fabric (1) or adjusting an included angle between the lens optical axis m of the linear array camera (2) and a light source optical axis n of the light source (3);
The light source collimation mechanism (5) is used for adjusting an included angle between a light source light axis n of the light source (3) and a lens light axis m of the linear array camera (2) or adjusting an included angle between the light source light axis n of the light source (3) and the plane of the fabric (1);
The linear array camera (2) is fixedly connected with the camera collimation mechanism (4);
the camera collimation mechanism (4) is fixedly connected with the frame (8);
the light source (3) is fixedly connected with the light source collimation mechanism (5);
The light source collimation mechanism (5) is fixedly connected with the rack (8);
The method is characterized in that: the linear array camera (2) and the light source (3) are arranged on the same side of the fabric (1) between the first fabric guide (6) and the second fabric guide (9) and are arranged along the moving direction V of the plane of the fabric (1) in sequence or in reverse sequence, and the optical axis m of the lens of the linear array camera (2) is intersected with the optical axis n of the light source (3) above the surface of the fabric (1);
When the sequences are arranged in sequence: the intersection point of the lens optical axis m of the linear array camera (2) and the light source optical axis n of the light source (3) which are intersected above the surface of the fabric (1) is an O point,
the included angle alpha between the lens optical axis m of the linear array camera (2) and the moving direction V of the plane of the fabric (1) is 5 degrees ~ 85 degrees,
the included angle beta between the light source light axis n of the light source (3) and the lens light axis m of the linear array camera (2) is 5 degrees ~ 85 degrees,
The included angle alpha and the included angle beta are in the same first plane, the first plane is perpendicular to the plane of the fabric (1), and the first plane is parallel to the moving direction V of the plane of the fabric (1);
when the sequences are arranged in the reverse order: the intersection point of the lens optical axis m of the linear array camera (2) and the light source optical axis n of the light source (3) which are intersected above the surface of the fabric (1) is an O' point,
the included angle alpha' between the light source optical axis n of the light source (3) and the moving direction V of the plane of the fabric (1) is 5 degrees ~ 85 degrees,
the included angle beta' between the lens optical axis m of the linear array camera (2) and the light source optical axis n of the light source (3) is 5 degrees ~ 85 degrees,
the angle alpha 'and the angle beta' are in the same second plane, which is perpendicular to the plane of the fabric (1) and which is parallel to the direction of movement V of the plane of the fabric (1).
2. the machine-vision fabric-weaving-pattern-based image extraction device of claim 1, characterized in that: the light source (3) adopts a white light source.
3. the image extraction device based on machine vision fabric weaving flower pattern of claim 1 or 2, characterized in that: the line camera (2) is a color camera or a monochrome camera.
4. A method for imaging an image of a machine vision based fabric weaving flower pattern, using the apparatus for extracting an image of a machine vision based fabric weaving flower pattern according to any one of claims 1 to 3, the method comprising the steps of:
a. under the condition that the linear array camera (2) and the light source (3) are arranged on the same side of the fabric (1) between the first fabric guide (6) and the second fabric guide (9) and are sequentially arranged along the moving direction V of the plane of the fabric (1):
firstly, when the fabric (1) starts to run between the first cloth guide (6) and the second cloth guide (9) along the moving direction V of the plane of the fabric (1),
adjusting a camera collimation mechanism (4) to enable an included angle alpha between a lens optical axis m of the linear array camera (2) and the moving direction V of the plane of the fabric (1) to be 5 degrees ~ 85 degrees;
adjusting a light source collimation mechanism (5) to enable an included angle beta between a light source light axis n of a light source (3) and a lens light axis m of the linear array camera (2) to be 5 degrees ~ 85 degrees;
adjusting the camera collimation mechanism (4) and the light source collimation mechanism (5) to enable a lens light axis m of the linear array camera (2) and a light source light axis n of the light source (3) to be intersected above the surface of the fabric (1);
starting the image processor (7) and continuously connecting the flower-shaped pattern images output by the linear array camera (2);
fine-tuning the light source collimation mechanism (5) to ensure that the image processed by the image processor (7) has the maximum contrast;
Fine-tuning the camera collimation mechanism (4) to ensure that the image processed by the image processor (7) has the maximum definition;
seventhly, fine adjustment is carried out on the light source collimation mechanism (5) and the camera collimation mechanism (4), so that the gray value calculated by the image processor (7) meets the requirement of extracting the weft yarn deformation angle value;
b. under the condition that the linear array camera (2) and the light source (3) are arranged on the same side of the fabric (1) between the first fabric guide (6) and the second fabric guide (9) and are arranged along the moving direction V of the plane of the fabric (1) in a reverse order:
Firstly, when the fabric (1) starts to run between the first cloth guide (6) and the second cloth guide (9) along the moving direction V of the plane of the fabric (1),
adjusting the light source collimation mechanism (5) to enable an included angle alpha' between a light source optical axis n of the light source (3) and the moving direction V of the plane of the fabric (1) to be 5 degrees ~ 85 degrees;
adjusting a camera collimation mechanism (4) to enable an included angle beta' between a lens optical axis m of the linear array camera (2) and a light source optical axis n of the light source (3) to be 5 degrees ~ 85 degrees;
adjusting the light source collimation mechanism (5) and the camera collimation mechanism (4) to enable a light source light axis n of the light source (3) and a lens light axis m of the linear array camera (2) to be intersected above the surface of the fabric (1);
starting the image processor (7) and continuously connecting the flower-shaped pattern images output by the linear array camera (2);
fine-tuning the light source collimation mechanism (5) to ensure that the image processed by the image processor (7) has the maximum contrast;
Fine-tuning the camera collimation mechanism (4) to ensure that the image processed by the image processor (7) has the maximum definition;
and (c) fine-tuning the light source collimation mechanism (5) and the camera collimation mechanism (4), so that the gray value calculated by the image processor (7) meets the requirement of extracting the weft deformation angle value.
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| CN201546094U (en) * | 2009-09-22 | 2010-08-11 | 上海祥网瑞电子科技有限公司 | Fabric detection device |
| CN201648816U (en) * | 2010-03-26 | 2010-11-24 | 顾金华 | Automatic weft straightener based on machine vision |
| CN102221558A (en) * | 2011-06-09 | 2011-10-19 | 洛阳方智测控股份有限公司 | Charge coupled device (CCD) detection device for automatic burling machine |
| CN203191320U (en) * | 2013-04-03 | 2013-09-11 | 杭州赤霄科技有限公司 | Image acquisition device for planar array material surface detection |
| CN203337567U (en) * | 2013-07-18 | 2013-12-11 | 常州市宏大电气有限公司 | Fabric detection device based on machine vision |
| CN205484100U (en) * | 2016-01-11 | 2016-08-17 | 深圳市麦克斯泰有限公司 | Flaw off -line monitoring system of cloth |
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2017
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