CN208013080U - One kind detecting Plastic foreign fiber device based on polarization state detection technique - Google Patents
One kind detecting Plastic foreign fiber device based on polarization state detection technique Download PDFInfo
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- CN208013080U CN208013080U CN201820343247.7U CN201820343247U CN208013080U CN 208013080 U CN208013080 U CN 208013080U CN 201820343247 U CN201820343247 U CN 201820343247U CN 208013080 U CN208013080 U CN 208013080U
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Abstract
The utility model discloses a kind of based on polarization state detection technique detection Plastic foreign fiber device, including polarization camera, lighting mechanism, the polarizer, background board, image collection processing system, described image acquisition processing system is connected with polarization camera, the lighting mechanism is polarized by the polarizer, it is polarized illumination environment to make the lighting environment of fiber to be detected, the background board is located at one end of lighting mechanism, the polarization camera is located at the other end of lighting mechanism, and carries out total reflection polarization state imaging to fiber to be detected.The device can be applied in cotton mill in isomerism fabric sorting equipment, for detecting the polypropylene fiber silk in spinning material, plastics and mulch etc. and the close foreign peoples's substance of cotton color.It solves and cannot distinguish between white and the defect of transparent class plastic substance using visible light and ultraviolet light.
Description
Technical field
The utility model is related to a kind of textile apparatus, and Plastic is detected based on polarization state detection technique more particularly, to one kind
Foreign fiber device.
Background technology
In the production process of cotton yarn, generally use isomerism fabric sorting machine distinguishes cotton fiber and other and cotton fiber
Color differs larger foreign fiber, and is difficult to differentiate between (such as white polypropylene fiber silk, plastics with foreign fiber similar in cotton color
Foreign fiber etc.), existing isomerism fabric sorting machine acquires visible spectrum hypograph by using colored CCD, utilizes color zones
Divide different cotton fibers and foreign fiber, this detection mode that can only identify colorful substance, transparent and white impurity is detected
Production requirement cannot be met.Therefore, it is necessary to provide a kind of new detection device to solve the above problems.
Utility model content
The purpose of this utility model is to provide a kind of bases that can accurately distinguish cotton fiber and Plastic foreign fiber
Plastic foreign fiber device is detected in polarization state detection technique.
To achieve the goals above, the used technical solution of the utility model is as described below：
One kind detecting Plastic foreign fiber device based on polarization state detection technique, including polarizes camera, lighting mechanism, rises
Inclined device, background board, image collection processing system, described image acquisition processing system are connected with polarization camera, the flare-aircraft
Structure is polarized by the polarizer, and it is polarized illumination environment to make the lighting environment of fiber to be detected, and the background board is located at flare-aircraft
One end of structure, the polarization camera is located at the other end of lighting mechanism, and carries out total reflection polarization state imaging to fiber to be detected.
The lighting mechanism uses white LED light source, the white LED light source to be provided by white light LEDs fluorescent tube；The white light
The polarizer is provided with before LED lamp tube, 0 degree of the polarizer use is polarized, to realize that linearly polarized light illuminates.
The white LED light source is arranged in the both sides of fiber to be detected, and the white light LEDs fluorescent tube close to polarization camera side is
6-8 roots, arc-shaped arrangement carry out the irradiation of primary illumination effect；It is transmitted using two white light LEDs fluorescent tubes close to background board side
Light filling.
A white light LEDs fluorescent tube, the brightness for adjusting background luminance and fiber to be detected are provided with before the background board
Comparison meets detection use environment requirement.
The white LED light source is symmetrically discharged in the both sides of fiber to be detected, and obverse and reverse detects simultaneously, using 10-
14 white light LEDs fluorescent tubes.
The polarization camera polarizes camera using Stokes vectors, and Stokes vectors polarization camera mechanism uses three lines
Or four line line-scan digital cameras, plate polarizing coating before each photoelectric sensor, using 0 degree, 45 degree, 90 degree of three angle analyzings come
Shoot the polarization image of object.
The Stokes vectors polarization camera is provided with gray scale photoelectric sensor.
The polarization camera carries out total reflection polarization state using total reflection prism using total reflection polarization camera to object
Imaging, the total reflection polarize in camera and are provided with S-polarization detection sensor and P polarization detection sensor.
The polarization camera carries out total reflection polarization state using total reflection prism using total reflection polarization camera to object
Imaging, the total reflection polarization camera is using R, G, B wherein some color decomposition at the polarization camera of two polarization states.
The sensor uses linear array photoelectric sensors or face array photoelectric sensor.
Compared with prior art, it is anisotropic fine to be based on total reflection principle polarization state detection technique detection Plastic for the utility model
The advantageous effect of dimension device is：The utility model can accurately distinguish out very much cotton fiber and with similar in cotton fiber color
Foreign fiber improves production efficiency, makes up and detects deficiency under existing visible light wave range and ultraviolet band.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model embodiment 1；
Fig. 2 is the first structural schematic diagram of total reflection polarization camera in Fig. 1；
Fig. 3 is second of structural schematic diagram of total reflection polarization camera in Fig. 1；
Fig. 4 is the structural schematic diagram of the utility model embodiment 2；
Fig. 5 is the schematic diagram of Stokes vectors polarization camera in Fig. 4.
Specific implementation mode
The utility model is further described below with reference to specific embodiment.
As shown in Figure 1, the utility model offer is a kind of different based on total reflection principle polarization state detection technique detection Plastic
Property fiber plant, including：Lighting mechanism 2 for providing illumination to fiber 7 to be detected, for rising for lighting mechanism light source polarization
Inclined device structure 3, and polarize camera 1, image collection processing system 5 and polarization phase for being totally reflected the total reflection of polarization state detection
Machine 1 is connected.The total reflection polarizes camera 1, and total reflection polarization imaging is realized using prism.
In the present embodiment, the lighting mechanism 2 is arranged using combination, including main front side-illuminated 6-8 root white LED lamps
Pipe, is arranged using arc, ensures that lighting environment is uniform, and is divided into two groups up and down, and there are gap 6, the total reflection polarizations for centre
Camera 1 carries out image acquisition from gap 6.In 7 other side of fiber to be detected using 2 transmitting white light LED lamp tubes 21 as benefit
Radiant.The lighting mechanism 2, which needs to be polarized device 3, to be polarized, and provides linearly polarized light lighting environment, each polarizer is in photograph
On front side of bright light tube group, ensure that the spectrum being irradiated on fiber 7 to be detected is linearly polarized light.The polarizer 3 is polarized using 0 degree,
Linearly polarized light illumination is provided.
Further, the lighting mechanism 2 further includes the light source 22 of adjusting 4 brightness of background board, for adjusting background
The brightness contrast of brightness and fiber to be detected meets detection use environment requirement.
In use, the light of the white light LEDs fluorescent tube irradiation, which is polarized device, plays to the rear, formation linearly polarized light illumination, irradiation
On fiber 7 to be detected, camera 1 is polarized to image objects by total reflection, excludes polarization state image under the total reflection of object.
Since light is electromagnetic wave, according to the vectorial property of electromagnetic wave, by vibration vector be decomposed into vertical component S components and
Horizontal component p-component, when light is with brewster angle incidence, reflected light and refraction light are orthogonal.This angle is deviated from, it will
There is part non-polarized light to be mingled in polarised light.Our this light are referred to as partial poolarized light, and partial polarization just has degree.
For natural light, P components and S components all exist, and only there are one shake direction, i.e., only S for linearly polarized light
Component does not have P components.Since linearly polarized light is in vertical incidence, the only S components in vertical incidence face, without the parallel plane of incidence
P components, and natural light S components and P components all exist, and can be very good the polarization that reflected light is distinguished in detection according to the principle
State.
According to principles above, when detecting cotton fiber and fibre different with gloss, it is only necessary to polarizing light irradiation is used, due to cotton
Flower is diffuse reflector, and polarised light becomes natural light after diffusing reflection；And the smooth object in surfaces such as mulch, white polypropylene fiber silk or
Object with gloss is passing through mirror-reflection and transmission, birefringence etc., changes the polarization state of incident light, to change S points
Amount and the size of P components can distinguish cotton fiber and different fibre well according to the polarization state of body surface reflected light.
According to principles above, using known polarization state (can be line partially, circle partially etc.) controllable light source 2 (can be LED,
Fluorescent tube, existing LED light source can) irradiation be detected scene, incident light is reflected by examined object, as shown in Fig. 2, phase
Machine 1 obtains the light for having object to be reflected back by camera lens or microscope group 11, and by two points of mirrors in camera or prism group 10 by its
Two polarization states are decomposed into, are s polarised lights and p-polarization light respectively, the s polarised lights in the light vector (electric field vector)
Direction of vibration is perpendicular to the plane of incidence；The direction of vibration of p-polarization light in light vector is parallel to the plane of incidence；The plane of incidence is interface normal
The plane formed with the wave vector direction of incident ray, camera synchronize the image for obtaining s and p-polarization state, arrive photoelectric sensor 8 respectively
On 9, corresponding is photoelectric sensor Ys and Yp, and photoelectric sensor can be linear array or face battle array, to obtain detected material
The polarization image of body.And image collection processing system 5, the image obtained by camera is handled, and handling result is led to
Know the executing agency using the device or interconnection architecture.
In Fig. 2, the camera that total reflection polarization camera can be made of s and two polarization states of p, two photoelectric sensors point
Solve two polarization states, Y=Ys+Yp.Visible light is completed to realize with polarized light detection principle work one.
In Fig. 3, total reflection polarization camera can also pass through R, G, B in addition to the camera being made of s and two polarization states of p
One of Color Channel G sensor (can also be R, B) can be used for example in wherein two polarization states of some color decomposition
It is Gs and Gp that s, which is obtained, with two polarization states of p, can be formed in this way by G=Gs+Gp, then with other two Color Channel R, B
The image that RGB is indicated.Visible light is completed to realize with polarized light detection principle work one.
Wherein, the R channel sensors 20, Gs channel sensors 21, Gp channel sensors 22, B channel sensors 23 be all
Signal is passed in camera lens or microscope group 11 by prism group 10.
The camera that the polarization camera mechanism is made of s and two polarization states of p is the phase using two photoelectric sensors
Machine, internal photoelectric sensor is by optical spectroscopic prism, the optics for making object same position be reflected back, along same optical axis,
It is reflected into corresponding photoelectric sensor.
Using the polarization camera of R, G, B threeway road sensor, R, G, B three-colour sensor and p in the polarization camera mechanism
Polarization state is used in combination with s polarization states.By one of Color Channel, G=Gp+Gs obtains G channel datas, obtains simultaneously
R, G, B and s polarization state and p-polarization state of object to be detected.
Or R=Rp+Rs is used, R channel datas are obtained, while obtaining R, G, B and s polarization state and p of object to be detected
Polarization state.
Or B=Bp+Bs is used, channel B data are obtained, while obtaining R, G, B and s polarization state and p of object to be detected
Polarization state.
The polarization camera mechanism is using 2 or the camera of multiple photoelectric sensors, photoelectric sensor parallel arrangement, structure
At multi-thread camera.
Schematically the utility model and embodiments thereof are described above, description is not limiting, attached drawing
Shown in also be the utility model one of embodiment, actual structure is not limited to this.So if this field
Those of ordinary skill enlightened by it, without deviating from the purpose of the present invention, not inventively design
Frame mode similar with the technical solution and embodiment, all should belong to the protection range of the utility model.
In the embodiments of the present invention 2, as shown in figure 4, the utility model offer is a kind of inclined based on Stokes formula
Polarization state detection technique detects Plastic foreign fiber device, including：Lighting mechanism 2 for providing illumination to fiber to be detected,
Multi-angle polarization camera mechanism 1 for optical imagery.The lighting mechanism 2 uses 12 white light LEDs fluorescent tubes, using left and right
Symmetry arrangement, 6, left side LED lamp tube combine arrangement up and down, are equipped with the polarizer 3 in LED lamp tube front end, ensure light source emergent light
For linearly polarized light, linearly polarized light lighting environment is provided.
In light intensity and spectrum, the polarization state of light is loaded with many useful informations.Stokes formula are explained and describe part
Or whole polarization states.Stokes parameters in Stokes formula, i.e. polarization angle (line partially or circle inclined), degree of polarization, can basis
Formula sets or obtains, it is special may be used 0 degree, 45 degree, three angle analyzings such as 90 degree shoot the polarization image of object
(other angles for meeting Stokes formula can be selected), as shown in figure 5, and using 0 degree of 30,45 degree of camera, 31,90 degree of camera
Camera 32 distinguishes substance to be checked using the calculating of Stokes formula from cotton.
In use, the lighting mechanism 2 uses 12 white light LEDs fluorescent tube symmetry arrangements, fluorescent tube quantity can be with according to application
Adjustment, using 0 degree of polarizing coating polarizer 3, is polarized on front side of light source, provides polarized illumination environment.
Preferably, multi-angle polarization camera mechanism can shoot same object in 0 degree, 45 degree, 90 degree analyzing
Polarization image calculates the polarization state of object by computer control system according to Stokes principle.
Using known polarization state (can be line partially, circle partially etc.) controllable light source 2 (can be LED, fluorescent tube, existing
LED light source can) irradiation is detected scene, incident light reflected by examined object, and camera 1 passes through camera lens or microscope group 11 obtains
There is the light that object is reflected back, and multiple polarization angles (such as 0 are broken down by two points of mirrors in camera or prism group 10
Degree, 45 degree, 90 degree, according in Stokes formula selection polarization angle with quantity photoelectric sensor reception, can be linear array or
Person's face array photoelectric sensor, surface are coated with the polarizing coating of respective angles), wherein photoelectric sensor 33 can select to install additional, obtain
Take the normal brightness image of testee.Image collection processing system 5 handles the image obtained by camera, and will place
Manage executing agency or interconnection architecture of the result notice using the device.
Compared with prior art, it is anisotropic fine to be based on Stokes formula polarization state detection techniques detection Plastic for the utility model
The advantageous effect of dimension device is：The utility model can accurately distinguish out very much cotton fiber and with similar in cotton fiber color
Foreign fiber improves production efficiency.
In the structural schematic diagram of embodiment, camera internal photoelectric sensor ensures multiple sensors by optical prism group
Reflected light at the same position of acquisition, is imaged by same optical axis.Can also be that its camera internal photoelectric sensor is placed in parallel,
Such as can be multi-thread line-scan digital camera.
In the present embodiment 2, multi-angle polarizes camera and uses 4 line black and white cameras, wherein plated film on three sensors, point
Not Du 0 degree, 45 degree, 90 degree of polarizing coating analyzings, to obtain the polarization image under object all angles.Wherein multi-angle polarizes camera
3 or more area array cameras can also be used to combine, increase by 0 degree, 45 degree, 90 degree of analyzer analyzings before each camera, pass through figure
As integration technology is demarcated, polarization image under different angle is obtained under same target.
When light wave is reflected or transmitted from dielectric surface, polarization state may change, change and the incidence of polarization state
State, the dielectric surface state of light are related.The different conditions (roughness, voidage, water content) of different objects or object of the same race
There may be different polarization states.The intensity and polarization state that light is described using Stokes vector, utilize Stokes vector
Equation can calculate the polarization state of body surface reflected light.
The utility model is solved cannot distinguish between white and the defect of transparent class plastic substance using visible light and ultraviolet light,
Using Polarization Detection principle, camera is polarized using total reflection polarization camera or stoke vector, using polarized illumination, for
Cotton is diffuse reflector, and plastics substance has mirror-reflection and total reflection with different polarization states, extracts the inclined of object
Polarization state is imaged, to realize the rejecting of Plastic foreign fiber.
Schematically the utility model and embodiments thereof are described above, description is not limiting, attached drawing
Shown in also be the utility model one of embodiment, actual structure is not limited to this.So if this field
Those of ordinary skill enlightened by it, without deviating from the purpose of the present invention, not inventively design
Frame mode similar with the technical solution and embodiment, all should belong to the protection range of the utility model.
Claims (10)
1. one kind detecting Plastic foreign fiber device based on polarization state detection technique, which is characterized in that including polarization camera, shine
Bright mechanism, the polarizer, background board, image collection processing system, described image acquisition processing system are connected with polarization camera, institute
It states lighting mechanism to be polarized by the polarizer, it is polarized illumination environment, the background board position to make the lighting environment of fiber to be detected
In one end of lighting mechanism, the polarization camera is located at the other end of lighting mechanism, and to fiber to be detected be totally reflected partially
Polarization state is imaged.
2. according to claim 1 detect Plastic foreign fiber device based on polarization state detection technique, which is characterized in that
The lighting mechanism uses white LED light source, the white LED light source to be provided by white light LEDs fluorescent tube；The white light LEDs fluorescent tube
Before be provided with the polarizer, use 0 degree of the polarizer is polarized, to realize linearly polarized light illumination.
3. according to claim 2 detect Plastic foreign fiber device based on polarization state detection technique, which is characterized in that
The white LED light source is arranged in the both sides of fiber to be detected, and the white light LEDs fluorescent tube close to polarization camera side is 6-8 roots, is in
Arc arrangement carries out the irradiation of primary illumination effect；Close to background board side light filling is transmitted using two white light LEDs fluorescent tubes.
4. according to claim 3 detect Plastic foreign fiber device based on polarization state detection technique, which is characterized in that
A white light LEDs fluorescent tube is provided with before the background board, the brightness contrast for adjusting background luminance and fiber to be detected meets
Detect use environment requirement.
5. according to claim 2 detect Plastic foreign fiber device based on polarization state detection technique, which is characterized in that
The white LED light source is symmetrically discharged in the both sides of fiber to be detected, and obverse and reverse detects simultaneously, using 10-14 root white lights
LED lamp tube.
6. according to claim 5 detect Plastic foreign fiber device based on polarization state detection technique, which is characterized in that
The polarization camera polarizes camera using Stokes vectors, and Stokes vectors polarization camera mechanism uses three lines or four lines
Line-scan digital camera plates polarizing coating before each photoelectric sensor, and object is shot using 0 degree, 45 degree, 90 degree of three angle analyzings
Polarization image.
7. according to claim 6 detect Plastic foreign fiber device based on polarization state detection technique, which is characterized in that
The Stokes vectors polarization camera is provided with gray scale photoelectric sensor.
8. according to claim 3 detect Plastic foreign fiber device based on polarization state detection technique, which is characterized in that
The polarization camera is using total reflection polarization camera, and using total reflection prism, total reflection polarization state imaging is carried out to object, described
It is provided with S-polarization detection sensor and P polarization detection sensor in total reflection polarization camera.
9. according to claim 3 detect Plastic foreign fiber device based on polarization state detection technique, which is characterized in that
The polarization camera is using total reflection polarization camera, and using total reflection prism, total reflection polarization state imaging is carried out to object, described
Total reflection polarization camera is using R, G, B wherein some color decomposition at the polarization camera of two polarization states.
10. according to claim 6 detect Plastic foreign fiber device based on polarization state detection technique, feature exists
In the sensor uses linear array photoelectric sensors or face array photoelectric sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820343247.7U CN208013080U (en) | 2018-03-13 | 2018-03-13 | One kind detecting Plastic foreign fiber device based on polarization state detection technique |
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| CN201820343247.7U CN208013080U (en) | 2018-03-13 | 2018-03-13 | One kind detecting Plastic foreign fiber device based on polarization state detection technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111507962A (en) * | 2020-04-17 | 2020-08-07 | 无锡雪浪数制科技有限公司 | Cotton sundry identification system based on depth vision |
| CN112880600A (en) * | 2021-04-29 | 2021-06-01 | 深圳博升光电科技有限公司 | Imaging device and equipment for detecting glass |
-
2018
- 2018-03-13 CN CN201820343247.7U patent/CN208013080U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111507962A (en) * | 2020-04-17 | 2020-08-07 | 无锡雪浪数制科技有限公司 | Cotton sundry identification system based on depth vision |
| CN111507962B (en) * | 2020-04-17 | 2023-08-29 | 无锡雪浪数制科技有限公司 | Cotton interior sundry identification system based on depth vision |
| CN112880600A (en) * | 2021-04-29 | 2021-06-01 | 深圳博升光电科技有限公司 | Imaging device and equipment for detecting glass |
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