CN106017340A - Light-transmitting container wall thickness detection apparatus and method based on machine vision - Google Patents
Light-transmitting container wall thickness detection apparatus and method based on machine vision Download PDFInfo
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- CN106017340A CN106017340A CN201610525734.0A CN201610525734A CN106017340A CN 106017340 A CN106017340 A CN 106017340A CN 201610525734 A CN201610525734 A CN 201610525734A CN 106017340 A CN106017340 A CN 106017340A
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- 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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- G—PHYSICS
- 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
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- G—PHYSICS
- 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
- G01N2021/845—Objects on a conveyor
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Abstract
The invention provides a light-transmitting container wall thickness detection apparatus and method based on machine vision. The light-transmitting container wall thickness detection apparatus comprises a light source, a light splitting system, a detection lens, a spectrum detection instrument and a data processing unit. According to the light-transmitting container wall thickness detection apparatus, through the lens with quite large axial dispersion, incident light is enabled to be separate at focus points with different wavelengths in an axial direction and be distributed at a tangent direction vertical to a point to be measured of a glass bottle. By use of the lens with a large-value aperture, it can be ensured that accurate thickness information can still be detected when the glass bottle is under centrifugation rotation to a certain degree. By use of a white LED white-light source, the apparatus is enabled to be applied to transparent glass bottles with various colors. The apparatus is applied to online rapid and accurate real-time detection of the machine vision. The apparatus and method can accurately and stably measure thickness information of an online rotation moving bottle body and provide a basis for quality detection of glass bottles and other light-transmitting containers. The apparatus can still be applied to thickness detection of such flat-plate-shaped objects as glass plates and the like.
Description
Technical field
The present invention relates to field of optical detection, being specifically related to one, to carry out contactless machine vision online
The detection device and method of vial wall thickness.
Background technology
At present, empty bottle, pharmaceuticals industry quickly grow, but the backwardness that domestic enterprise's production technology is relative,
Substandard product the most easily occurs.In order to ensure product quality, need to dispatch from the factory at bottle
Carry out various detection before, and the concordance of glass container product wall thickness is to ensure that the one of vial quality
Individual important indicator.Domestic vial production and processing business currently mainly uses the side of contact vial thickness measuring
Formula detects, but this detection mode exists low precision, low velocity and the shortcoming of high detection cost,
A kind of contactless on-line checking mode more stable, at a high speed is extremely urgent.
Existing non contact thickness gaging detection equipment is mainly laser imaging method, i.e. based on laser at glass
Bottle front and rear wall reflection light point distance carrys out calculated wall thickness.The light source of this equipment is semiconductor laser so that it is to
Vial surface emitting light beam, a part of light is in outer wall generation direct reflection, and another part light is then
Enter bottle through outer wall, go out from outer wall refraction after inwall reflects, meeting into reflexive property
This hot spot A, B can be received at 2 by CCD camera on direction, due to the existence of bottle thickness,
Then there is certain spacing in two hot spots, can obtain bottle thickness and two light by certain mathematical algorithm
Relation between speckle spacing, laser incident angle and bottle refractive index, so after equipment is built,
Bottle thickness can be obtained by variable spot separation.From the point of view of in principle very simply, but in reality,
The spot number many more than two that CCD collects, the most also laser emission point O point the most inside and outside wall
Two mirror image luminous point O ' and O ", O ' point and A point, O on CCD imaging surface " put and B point position
Close, A, B point hot spot is differentiated and forms certain interference, directly contribute wall thickness inaccurate.Additionally,
Bottle is slight in rotating can make incident luminous point position on bottle unstable the most with one heart, there is CCD
The situation that target surface cannot collect.As can be seen here, it is inaccurate that this kind of optical detecting method has thickness measuring,
And the shortcoming of relatively low accuracy of detection.
Therefore, the currently used method existence ratio carrying out container wall thickness detection based on laser imaging method
More serious problem, it is difficult to meet advantage accurate, efficient, easy-to-use in commercial production.
Summary of the invention
It is desirable to provide one can efficiently and accurately by non-contacting mode to light transmission container,
The especially wall thickness of glass body carries out the device that detects and corresponding detection method.
Specifically, on the one hand, the present invention provides a kind of light transmission container wall thickness based on machine vision to examine
Survey device, it is characterised in that described light transmission container Wall Thickness Testing Device includes: light source, beam splitting system,
Detector lens, spectrum detection instrument, data processing unit,
Described light source is for producing the irradiation light of the visible light wave range with continuous or quasi-continuous spectrum；
Described beam splitting system is used for receiving described irradiation light, being sent to described detector lens, and
Reflection light from described detector lens is delivered to described spectrum detection instrument；
Described detector lens for focusing to light transmission container to be measured will be from institute by described irradiation light
The reflection light stating light transmission container is sent to described beam splitting system；
The spectrum of light, and the spectrum that will be obtained is reflected described in described spectrum detection instrument Real-time Collection
Information sends to described data processing unit；
Described data processing unit determines the wall thickness of described light transmission container based on described spectral information.
Further, described detector lens is axial dispersion camera lens, and described axial dispersion camera lens is by described
The different wavelengths of light irradiated in light focuses on the various location on optical axis.
Further, described beam splitting system includes 3 groups of lens and 1 component optical device, first group of lens
Light beam from described light source is changed into a collimated beam, is irradiated to described light-splitting device, light beam
After arriving second group of lens convergence through described light-splitting device, output is to described detector lens；Work as light beam
After described detector lens returns, arrive second group of lens and become collimated beam, through light-splitting device
Reflecting interface, major part luminous reflectance is to three lens cluster, after described three lens cluster converges,
Output is to described spectrum detection instrument.
Further, described data processing unit based in described reflection light spectrum corresponding to container inner wall,
The wavelength value of the reflection peak of outer wall, calculates the wall thickness of described light transmission container.
Further, between described detector lens and described beam splitting system by the first transmission optical waveguide that
This optic communication, the two ends of described first transmission optical waveguide are coupling in described inspection by fiber waveguide interface respectively
Survey input and the outfan of described beam splitting system of camera lens.
Further, by the second transmission optical waveguide light each other between described beam splitting system and described light source
Communication, the two ends of described second transmission optical waveguide are coupling in described light splitting system by fiber waveguide interface respectively
The input of system and the outfan of described light source.
On the other hand, the present invention provides a kind of light transmission container method for testing wall thickness based on machine vision,
It is characterized in that, described method includes:
Step 1), produce the irradiation light of visible light wave range with continuous spectrum or quasi-continuous spectrum；
Step 2), described irradiation light is radiated on tested light transmission container by detector lens；
Step 3), receive from described tested light transmission container reflection reflection light and by described reflection light
Deliver to spectrum detection instrument to obtain the spectrum of described reflection light；
Step 4), extract in the spectrum of described reflection light corresponding to described light transmission container inwall and
Wavelength at two reflection peaks of outer wall；
Step 5), based at two reflection peaks wavelength calculate described tested light transmission container wall thickness.
Further, described detector lens is axial dispersion camera lens, and described axial dispersion camera lens is by described
The different wavelengths of light irradiated in light focuses on the various location on optical axis.
Further, described irradiation light is radiated in described detector lens by a beam splitting system, from institute
State the described reflection light that detector lens is reflected back and be delivered to described spectrogrph after described beam splitting system light splitting.
In a kind of preferred implementation, described detection method also includes determining two based on following step
The wavelength of reflection peak:
Step (5.1) carries out dark noise removal to measured spectroscopic data；
Step (5.2) utilizes gaussian filtering to be smoothed the spectroscopic data removing dark noise；
Step (5.3) sets threshold value T (T > 0) rising for Detection curve or declining；
Step (5.4) selectes area-of-interest, and extracts at a predetermined interval from selected area-of-interest
Array, sets out with the starting point in the array of area-of-interest, calculates the follow-up spectrum of currency successively
Value and the difference of forerunner's spectral value；
Step (5.5), if described difference is more than T, assert that the curve of spectrum is in propradation labelling
It is 1, if this difference is less than-T, thinks that the curve of spectrum is in decline state and is labeled as-1, if should
More than-T and less than T, difference then thinks that curve is in level and is labeled as 0；
It is 1 continuously that data after labelling are found out left side mark value by design filtering core by step (5.6)
Right side mark value array index corresponding to the value of-1 continuously；
The first two in obtained all maximum is more than the maximum of predetermined threshold by step (5.7),
As bimodal.
The detection device of the present invention, as machine vision on-line detecting system, possesses at a high speed, stable, high
The advantage of precision.
The present invention uses confocal thickness measurement technology, in order to obtain measurement effect more stable, high-precision, essence
Degree can reach micron order.The present invention is by having the white light of continuous spectrum through axial dispersing optics system
, there is dispersion hot spot in bottle wall vertical line direction in system, and two band meters being reflected back by front and rear wall calculate wall
Thick.
Incident ray different wave length convergent point in the axial direction is made by having the camera lens of larger axis crossed disperstion
Separately, and be distributed in and be perpendicular to vial tested point tangential direction.The camera lens using large-numerical aperture is true
Protect and thickness information accurately also can be detected under a certain degree of centrifugal rotation of vial；And make glass
Glass bottle tested point all can be detected relative in camera lens optical axis ± 15 degree, has higher measurement stability,
Under mechanical system for the lower slightly precision of domestic vial streamline, there is well adapting to property, permissible
The one-tenth-value thickness 1/10 that the stably measured vial cycle rotates.
Use the beam splitting system of the present invention, it is achieved that direction isolation well, be greatly reduced light source
Light echo interference, it is ensured that spectrogrph obtains relatively high s/n ratio information.This beam splitting system has light path conjugation
Symmetry.
White light source is applicable to assorted Clear glass bottles and jars.Preferably LED white light source.Apparatus of the present invention
It is applicable to machine vision detect the most in real time online.Apparatus and method of the present invention can be accurate
Really stably measure the thickness information of online rotary motion bottle, provide for vial quality testing and depend on
According to.
Accompanying drawing explanation
Fig. 1 is the structural representation of the detection device in the embodiment of the present invention；
Fig. 2 is the vial to be detected schematic diagram on transporter during detected camera lens irradiation；
Fig. 3 is the detailed configuration schematic diagram of the detection device in the embodiment of the present invention；
Fig. 4 is the vial to be measured light path schematic diagram during illuminated；
Fig. 5 is the spectrum schematic diagram that detection obtains.
In figure, each labelling is respectively as follows:
1: vial to be measured
2: detector lens
3: beam splitting system
4: light source module
5: fiber spectrometer
6: computer
7: transmission optical waveguide
8: data wire
21: fiber waveguide interface
30: rotating device
31: lens
32: light-splitting device
33: fiber waveguide interface
40: online transporter
41:LED white light lamp bead
Detailed description of the invention
Embodiment 1
As it is shown in figure 1, in the present embodiment, detection device includes: detector lens 2, beam splitting system 3,
Highlighted LED white light source 4, fiber spectrometer 5 and spectroscopic data processing module 6 are (at the present embodiment
In realized by computer).Fig. 1 also show vial 1 to be measured, transmission optical waveguide 7 and data wire
8。
Highlighted LED white light source 4 can send white light as continuous spectrum light source, can be suitable for colors
Bottle, and there is stronger light power.Certainly, it should be appreciated by those skilled in the art that light source is permissible
It is the white light of different-colour, it would however also be possible to employ halogen light source or other light sources.
The irradiation light that highlighted LED white light source 4 produces transmits through transmission optical waveguide 7, transmission optical waveguide
One end of 7 couples with highlighted LED white light source 4, and the other end couples with beam splitting system 3.Light splitting system
Light is irradiated in system 3 reception, and through another transmission optical waveguide 7, received irradiation light is sent to inspection
Survey camera lens 2.Beam splitting system 3 has good isolation.Transmission optical waveguide of the present invention is preferred
For transmitting the multimode lightguide of visible light wave range.
Detector lens 2 focuses to irradiating light on the outer surface of vial 1 to be measured.Detector lens 2 is excellent
Choosing uses axial dispersion camera lens, and so, send due to highlighted LED white light source 4 is continuous spectrum
Light, after warp beam crossed disperstion lens focus so that the minimum focus point of visible ray different wave length hot spot indulge
To distribution on one wire, this line is perpendicular to bottle tested surface.Incide the light one on vial surface
Dividing and reflect at outer wall, a part reflects into glass and occurs reflection to reflect away from outer wall at inwall,
The hot spot color of twice return is different, and the hot spot wavelength returned in other words is different.Focus on glass to be measured
The light of two kinds of wavelength on the outer surface of bottle 1 and inner surface can occur stronger reflection, two surfaces
After reflected light back is returned, detector lens 2 can be incident to, after detector lens 2 is to reflection light collimation
Through transmission optical waveguide 7, return in beam splitting system 3.
Axially the operating distance scope of dispersion camera lens is to the axle of short wavelength's convergent point from long wavelength's convergent point
To distance, also referred to as measuring scope, the inside and outside wall of vial to be measured could effectively be examined in such range
Survey, so when building system, for the bottle of different thicknesses, being necessary to ensure that during detection at wall to be measured
In the range of measuring.
Beam splitting system 3 is by the incident illumination from highlighted LED white light source 4 and from detector lens 2
Reflection light carries out light splitting so that reflection light another light exit outgoing from beam splitting system, through transmission light
Waveguide 7 enters into fiber spectrometer 5.
Fiber spectrometer 5 measures the spectrum of reflection light in real time, and by measured spectral transmissions extremely
Spectroscopic data processing module 6.Spectroscopic data processing module 6 spectrum based on described reflection light determines described
The wall thickness of light transmission container.In the strength information that fiber spectrometer is recorded by spectroscopic data processing module 6
At maximum, wavelength is set up with vial thickness and is contacted, and obtains thickness information.
Axially the axial chromatic dispersion effects of the dispersion camera lens LED white light source 4 for being used is to lead to
Measure acquisition after in advance, i.e. can be expressly understood that the light of different wave length gathers through axial dispersion camera lens
Defocused, the light of focus location and any two wavelength range difference in the axial direction.The present invention
It is exactly to utilize this principle, once it is determined that focus on the inner surface of vial 1 to be measured and outer surface
The wavelength of light, the crest of the light i.e. reflected by vial 1 to be measured, it is possible to true based on two crests
Determine the distance between vial inner and outer wall.
It is illustrated in figure 2 the view when vial is detected.When detecting,
Vial is to transmit continuously, at detection device, arranges autobiography device 30, is put by vial 1 to be measured
On rotating device 30, rotating device 30 then moves along with conveyer belt 40.Detector lens 2
Optical axis direction crosses vial center, so measures one-tenth-value thickness 1/10 the most accurate, as shown in Figure 4.
Embodiment 2
In the present embodiment, one more specifically implementation is given.
Fig. 3 depicts the detailed structure of all parts.As it can be seen, light source 4 includes that LED is white
Light lamp bead the 41, first battery of lens 31-1, the first fiber waveguide interface 33-1 (SMA905).Beam splitting system
3 include: the second fiber waveguide interface 33-2, the 3rd fiber waveguide interface 33-3 and the 4th fiber waveguide interface 33-4,
Second battery of lens 31-2, the 3rd battery of lens 31-3 and the 4th battery of lens 31-4 and light-splitting device 32,
Optical lens 2 includes the 5th fiber waveguide interface 21.Beam splitting system 2 and light source 4, fiber spectrometer 5
And connected by transmission optical waveguide 7-1,7-2 and 7-3 between detector lens 2.
The light that LED white light lamp bead 41 sends becomes directional light after the first battery of lens 31-1 collimation, should
Directional light is through the transmission optical waveguide 7-1 and the second battery of lens 31-2 of 50 μm core diameters, and the second battery of lens will
Light beam from highlighted LED white light source 4 is changed into a collimated beam, enters into light-splitting device 32,
Irradiate light transmission light-splitting device 32 and through the 3rd battery of lens 31-4 outgoing with above-mentioned same type, light beam
Convergence is a hot spot, and the second fiber waveguide 7-2 is placed in this convergence position；Second fiber waveguide 7-2 will be irradiated
Light is delivered to detector lens 2, and detector lens is axial dispersion camera lens, by the effect of axial dispersion camera lens
Produce axial dispersion, after receiving the reflection light that camera lens transmission is returned after testing, become one through battery of lens
Bundle directional light, is reflexed to the battery of lens of same type, and pools a hot spot coupling by light-splitting device
Close and enter in fiber waveguide 7-3 connecting fiber spectrometer.Light-splitting device 32 has polarization choosing for reflecting surface
The prism of selecting property or light splitting piece.
Vial 1 to be detected is delivered to detect position by conveyer belt, and now the inside and outside wall of bottle all falls within detection
In the range of the measurement of camera lens, and being provided with rotating device on transporter, bottle is placed on this rotation dress
Put.The light that LED white light source sends through beam splitting system 3 from detector lens 2 port outgoing, warp
Return detector lens 2 after crossing the reflection of bottle inside and outside wall, again pass by beam splitting system 3 and arrive fiber spectrometer
5, the wavelength of the computer control system two very big intensity by obtaining from fiber spectrometer 5 calculates
Wall thickness at tested point on vial to be detected.
As it is shown in figure 5, inventors herein have recognized that, measure vial wall thickness and measure simple glass
It is to exist to compare significant difference.When inventor have found measurement vial, at two of which maximum
Wavelength and vial wall thickness there is numerical relation.
H is the one-tenth-value thickness 1/10 of vial tested point；
f(λ1)、f(λ2) it is the operating distance of wavelength at two maximum, i.e. measure lens light output end and arrive
Converge minimum light speckle distance；
θ is the incident illumination producing second the maximum angle of incidence size at vial outer wall；
N is vial refractive index value.
Although according to mode above, it is possible to obtain the distance of glass wall thickness, but the most not considering
To signal noise problem.
In order to obtain data more accurately, it is thus achieved that after spectral information data, spectroscopic data processing module 6
Need to carry out certain process and obtain spectral information more accurately.The process done has in spectrum picture dark
The removal of noise, the display of thickness cycle and the removal of wherein Null Spot.
The source of dark noise has three kinds, and one is that the fiber waveguide other end plug end face connecting detector lens returns
The reflection light returned；Two is the interference of ambient light, and ambient light enters from detector lens end thus forms interference；
Three is the veiling glare formed in optical waveguide coupled transmission, and its size is long by type of optical waveguide, fiber waveguide
Short and the impact of light source；Wherein maximum with the first source impact.So dark noise is formed and causes optical fiber
The spectral information that spectrogrph obtains has a fixing end and makes an uproar, and its size is along with CCD in spectrogrph
The time of integration, the intensity of light source, optical waveguide coupled efficiency etc. changes, and spectral shape is LED white light source
Spectral information.Remove dark noise process include: first in detection range without bottle time, carry out
Signals collecting, this signal is dark-noise signal；Then put vial to be measured, obtain one added with bottle
The signal of body information, the latter deducts the former, then obtain is the signal of single glass bottle.
Remove bottle tested point inside and outside wall to be measured returns after dark noise spectral information as it is shown in figure 5, its
Accurately extracting of middle bimodal is the basis precisely recording one-tenth-value thickness 1/10.
The extraction thinking of bimodal is to find in spectrogrph this one-dimensional data of ccd array 1 × N to compare
Abscissa value corresponding to obvious two peak values, say, that find in one-dimensional data in all maximum
The value of the abscissa corresponding to the first two higher value.
First the actual spectrum data of bottle to be measured are obtained, after i.e. original spectral data deducts dark noise
Spectroscopic data, and utilize gaussian filtering to come smoothed data elimination noise, the pretreatment of complete paired data.
Then threshold value T (T > 0) risen or decline is set for Detection curve, from selected interested
The starting point in region is set out, and calculates the follow-up spectral value of currency and the difference of forerunner's spectral value successively,
If this difference is more than T, think that the curve of spectrum is in propradation and is labeled as 1, if this difference is little
Then think that the curve of spectrum is in decline state and is labeled as-1 in-T, if this difference more than-T and is less than
T then thinks that curve is in level and is labeled as 0；Afterwards the data after labelling are filtered by design
Core just can find out mark value on the left of those be continuously on the right side of in the of 1 mark value continuously corresponding to the value of-1
Array index.The first two in all maximum in two the i.e. one-dimensional datas of array index that finally will obtain
Higher value, is bimodal.The method is high for location bimodal locating accuracy, greatly avoids
The interference that noise extracts for peak position.
Carry out bottle to be measured on this basis with detector lens relative to the regulation of position, accomplish system building
The most accurate the most effective.
The Real time displaying of thickness One-Point-Value and periodic quantity thereof compare obtain bimodal spectral curve, more
For get information about bottle to be measured per time the thickness information of tested point inscribed.At the ripple obtaining bimodal correspondence
After long value, carry out above-mentioned mathematical operation and just can get one-tenth-value thickness 1/10, along with the rotation of bottle, then can obtain
Periodic quantity to bottle thickness；The most exportable time arranges, for on-line checking system with the data of one-tenth-value thickness 1/10
The demand of system makes reference, and such as the maximin in extracting cycle value, does difference with this and obtains bottle to be measured thickness
Thin difference, i.e. quantifies inhomogeneities.Additionally, at molding line or dark bottle there may be to be measured
The phenomenon that some inwall reflection light is weak or reflection direction deviation is big thus cannot be detected, such data
One-tenth-value thickness 1/10 after process is invalid, and Null Spot is the most excessive relative to normal value, sets fixing in algorithm
Threshold value, the value outside threshold range can make the judgement of Null Spot.
Although it should be noted that the description present invention carried out above in conjunction with vial, but originally
Skilled person should be appreciated that, however not excluded that can apply the present invention to the distance of smooth surface object
Measuring, the material of testee can be plastics, papery, glass, pottery, metal.
Although the principle of the present invention being described in detail above in conjunction with the preferred embodiments of the present invention,
It should be appreciated by those skilled in the art that above-described embodiment is only the exemplary implementation to the present invention
Explanation, not the present invention is comprised the restriction of scope.Details in embodiment is not intended that this
The restriction of bright scope, without departing from the spirit and scope of the present invention, any based on the present invention
The equivalent transformation of technical scheme, simple replacement etc. obviously change, and all fall within the present invention and protect model
Within enclosing.
Claims (9)
1. a light transmission container Wall Thickness Testing Device based on machine vision, it is characterised in that described
Light transmission container Wall Thickness Testing Device includes: light source, beam splitting system, detector lens, spectrum detection instrument,
Data processing unit,
Described light source is for producing the irradiation light of the visible light wave range with continuous or quasi-continuous spectrum；
Described beam splitting system is used for receiving described irradiation light, being sent to described detector lens, and in the future
Described spectrum detection instrument is delivered to from the reflection light of described detector lens；
Described detector lens for focusing to light transmission container to be measured will be from described by described irradiation light
The reflection light of light container is sent to described beam splitting system；
The spectrum of light, and the spectral information that will be obtained is reflected described in described spectrum detection instrument Real-time Collection
Send to described data processing unit；
Described data processing unit determines the wall thickness of described light transmission container based on described spectral information.
Light transmission container Wall Thickness Testing Device based on machine vision the most according to claim 1,
It is characterized in that, described detector lens is axial dispersion camera lens, and described axial dispersion camera lens is by described photograph
Penetrate the various location that the different wavelengths of light in light focuses on optical axis.
Light transmission container Wall Thickness Testing Device based on machine vision the most according to claim 1,
It is characterized in that, described beam splitting system includes 3 groups of lens and 1 component optical device, and first group of lens will
Light beam from described light source is changed into a collimated beam, is irradiated to described light-splitting device, and light beam is saturating
Crossing described light-splitting device and arrive after second group of lens converge, output is to described detector lens；When light beam from
After described detector lens returns, arrive second group of lens and become collimated beam, through light-splitting device
Reflecting interface, major part luminous reflectance to three lens cluster, after described three lens cluster converges, defeated
Go out to described spectrum detection instrument.
Light transmission container Wall Thickness Testing Device based on machine vision the most according to claim 1,
It is characterized in that, described data processing unit based in described reflection light spectrum corresponding to container inner wall,
The wavelength value of the reflection peak of outer wall, calculates the wall thickness of described light transmission container.
Light transmission container Wall Thickness Testing Device based on machine vision the most according to claim 1,
It is characterized in that, between described detector lens and described beam splitting system by the first transmission optical waveguide each other
Optic communication, the two ends of described first transmission optical waveguide are coupling in described detection by fiber waveguide interface respectively
The input of camera lens and the outfan of described beam splitting system.
Light transmission container Wall Thickness Testing Device based on machine vision the most according to claim 5,
It is characterized in that, led to by the second transmission optical waveguide light each other between described beam splitting system and described light source
Letter, the two ends of described second transmission optical waveguide are coupling in described beam splitting system by fiber waveguide interface respectively
Input and the outfan of described light source.
7. a light transmission container method for testing wall thickness based on machine vision, it is characterised in that described
Method includes:
Step 1), produce the irradiation light of visible light wave range with continuous spectrum or quasi-continuous spectrum；
Step 2), described irradiation light is radiated on tested light transmission container by detector lens；
Step 3), receive from described tested light transmission container reflection reflection light and described reflection light is delivered to
Spectrum detection instrument is to obtain the spectrum of described reflection light；
Step 4), extract the inner and outer wall corresponding to described light transmission container in the spectrum of described reflection light
Two reflection peaks at wavelength；
Step 5), based at two reflection peaks wavelength calculate described tested light transmission container wall thickness.
Light transmission container method for testing wall thickness based on machine vision the most according to claim 7,
It is characterized in that, described detector lens is axial dispersion camera lens, and described axial dispersion camera lens is by described photograph
Penetrate the various location that the different wavelengths of light in light focuses on optical axis.
Light transmission container method for testing wall thickness based on machine vision the most according to claim 7,
It is characterized in that, described irradiation light is radiated in described detector lens by a beam splitting system, from described
The described reflection light that detector lens is reflected back is delivered to described spectrogrph after described beam splitting system light splitting.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107870149A (en) * | 2017-11-01 | 2018-04-03 | 武汉能斯特科技有限公司 | A kind of method and apparatus of spectrum of measurement and application thereof |
| CN108362702A (en) * | 2017-12-14 | 2018-08-03 | 北京木业邦科技有限公司 | A kind of defect of veneer detection method, system and equipment based on artificial intelligence |
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| CN114375383A (en) * | 2019-07-12 | 2022-04-19 | 蒂阿马公司 | Apparatus and method for measuring wall thickness of glass container |
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| CN107870149B (en) * | 2017-11-01 | 2020-07-31 | 武汉能斯特科技有限公司 | Method and device for measuring spectrum and use thereof |
| CN107870149A (en) * | 2017-11-01 | 2018-04-03 | 武汉能斯特科技有限公司 | A kind of method and apparatus of spectrum of measurement and application thereof |
| CN108362702A (en) * | 2017-12-14 | 2018-08-03 | 北京木业邦科技有限公司 | A kind of defect of veneer detection method, system and equipment based on artificial intelligence |
| CN108875124A (en) * | 2018-04-26 | 2018-11-23 | 哈尔滨工业大学 | Extract the maximum backoff algorithm of confocal axial response curve peak position |
| CN108875124B (en) * | 2018-04-26 | 2022-04-01 | 哈尔滨工业大学 | Maximum value compensation algorithm for extracting peak value position of confocal axial response curve |
| CN108871212A (en) * | 2018-07-06 | 2018-11-23 | 杭州前茂保健食品有限公司 | A kind of vial Wall Thickness Testing Device |
| CN108871212B (en) * | 2018-07-06 | 2020-07-24 | 山东景耀玻璃集团有限公司 | Glass bottle wall thickness detection device |
| CN114375383A (en) * | 2019-07-12 | 2022-04-19 | 蒂阿马公司 | Apparatus and method for measuring wall thickness of glass container |
| CN112147622A (en) * | 2020-09-02 | 2020-12-29 | Oppo（重庆）智能科技有限公司 | Distance measuring device, distance measuring method, camera and electronic equipment |
| CN112147622B (en) * | 2020-09-02 | 2024-02-06 | Oppo广东移动通信有限公司 | Distance measuring device, distance measuring method, camera and electronic equipment |
| CN112344865A (en) * | 2020-11-06 | 2021-02-09 | 中国船舶重工集团公司第七0七研究所 | Hemisphere harmonic oscillator wall thickness and wall thickness uniformity in-situ measurement system and method |
| CN114608455A (en) * | 2020-12-09 | 2022-06-10 | 青岛荣泰玻璃制品有限公司 | Glass wine bottle wall thickness tester and use method thereof |
| CN113790674A (en) * | 2021-08-06 | 2021-12-14 | 河北光兴半导体技术有限公司 | Measuring method, processor and measuring device for glass product |
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