CN106932099B - A kind of multispectral Online color-difference measurement instrument and its application - Google Patents
A kind of multispectral Online color-difference measurement instrument and its application Download PDFInfo
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- CN106932099B CN106932099B CN201710343225.0A CN201710343225A CN106932099B CN 106932099 B CN106932099 B CN 106932099B CN 201710343225 A CN201710343225 A CN 201710343225A CN 106932099 B CN106932099 B CN 106932099B
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- 238000005259 measurement Methods 0.000 title claims abstract description 36
- 239000000523 sample Substances 0.000 claims abstract description 58
- 238000012545 processing Methods 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000007639 printing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 7
- 238000004737 colorimetric analysis Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 claims description 4
- 244000174681 Michelia champaca Species 0.000 claims description 3
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000013528 artificial neural network Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000009123 feedback regulation Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000005286 illumination Methods 0.000 description 3
- 238000011897 real-time detection Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J3/52—Measurement of colour; Colour measuring devices, e.g. colorimeters using colour charts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D25/00—Control of light, e.g. intensity, colour or phase
- G05D25/02—Control of light, e.g. intensity, colour or phase characterised by the use of electric means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
- G01J2003/466—Coded colour; Recognition of predetermined colour; Determining proximity to predetermined colour
Abstract
The invention belongs to optical detecting instrument fields, and disclose a kind of multispectral Online color-difference measurement instrument, including observation ball, shifting axle, spectrometer, data processing module, control module and position detecting device, observing ball includes industrial camera, integrating sphere light source and fibre-optical probe, industrial camera is connect with data processing module, and fibre-optical probe is connect with the spectrometer；Spectrometer has external trigger module and data transmission module, and external trigger module is connect with the control module, and data transmission module is connect with data processing module；Control module connects the position detecting device, is positioned with reading location information and the measuring targets of object under test, then controls spectrometer by external trigger module again and measures.The present invention improves online quality of colour detection efficiency, effectively reduces rejection rate by the automatic control to ink usage, product quality and production efficiency can be greatly improved.
Description
Technical field
The invention belongs to optical detecting instrument field, more particularly, to a kind of multispectral Online color-difference measurement instrument and its
Using.
Background technique
In the industrial production, quality control is highly important link, and quality of colour control is even more the most important thing.Now
The chromatism measurement mode that most enterprises use is still worker and is sampled the measurement for being carried out color difference using off-line device, offline
Color detection product it is very mature, but make inefficiency in this way and can not real-time detection go out misalignment, make
It obtains rejection rate to improve, and destruction may be generated to product, so that product quality is difficult to effectively improve.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of multispectral Online color-difference measurement instrument
And its application, multispectral Online color-difference measurement instrument direct-on-line real-time detection product color difference, it finds to stop automatically when substandard product
Line is simultaneously alarmed, to realize effective control to product quality.
To achieve the above object, it is proposed, according to the invention, provide a kind of multispectral Online color-difference measurement instrument, which is characterized in that
Including observation ball, shifting axle, spectrometer, data processing module, control module and position detecting device, wherein
The observation ball includes industrial camera, integrating sphere light source and fibre-optical probe, and the shell of the industrial camera is mounted on
On the shifting axle, the integrating sphere light source and the fibre-optical probe are installed on the shell of the industrial camera, and institute
State angle formed by the axis of fibre-optical probe and the axis of the industrial camera lens be acute angle, the industrial camera by serial ports with
Data processing module connection, the fibre-optical probe are connect by optical cable with the spectrometer；
The spectrometer has external trigger module and data transmission module, and the external trigger module and the control module connect
It connects, the data transmission module is connect with the data processing module；
The control module connects the position detecting device, to read the location information and measuring targets of object under test
It is positioned, spectrometer is then controlled by external trigger module again and is measured.
Preferably, the industrial camera is installed on the shifting axle by link activity.
Preferably, the observation ball is provided with that multiple and they are installed on the shifting axle.
Preferably, the quantity of the spectrometer is consistent with the quantity of the industrial camera.
Preferably, the data processing module includes product selecting module, data acquisition module and real-time monitoring module,
In,
The product selecting module is used to carry out the selection of object under test；
The acquisition that the data acquisition module is used to carry out chromatism data is shown comprising color difference chart module, color difference number
According to module and parameter setting module, the color difference chart module is sat for real-time display chromatic curve and in △ L* △ a* △ b*
It marks on a map middle display △ L* △ a* △ b* color difference components, then using the maximum color difference components of the numerical value of acquisition as adjustment ink usage
With reference to wherein △ L* represents luminance deviation, illustrates that sample is brighter than standard sample when taking positive value, on the contrary then darker；△a*
Red green axis deviation is represented, illustrates that sample is partially redder than standard sample when taking positive value, it is on the contrary then partially green；It is inclined that △ b* represents champac axis
Difference illustrates that sample is partially more yellow than standard sample when taking positive value, on the contrary then partially blue；The chromatism data module is used for color difference number
It is shown according to table and the query function of data is provided；The parameter setting module is used for the setting of measurement parameter；
The real-time monitoring module, which is used to show, to be observed the monitored picture passed back of ball and measures auxiliary positioning a little,
And it is alarmed when color difference is more than threshold value by alarm.
Other side according to the invention additionally provides the side of multispectral Online color-difference measurement instrument adjustment ink in printing press
Method, which comprises the following steps:
1) shifting axle is installed in the rack of printing machine；
2) observation ball is moved to above standard sample to carry out parameter calibration, to determine standard sample L*a*b* value；
3) observation ball is moved to above standard white plate to carry out white calibration, for determining the L*a*b* of reference white
Value；
4) observation ball is moved to measurement position, starts to measure and opens production line；
5) spectrometer reads reflected light wavelength, to obtain tristimulus values, and then obtains the L*a*b* value of sample；
6) the L*a*b* value of data processing equipment step 2) Plays sample, the L*a*b* value of step 3) Plays white and
The L*a*b* value of sample carries out Colorimetry in step 5), obtains the △ L* △ a* △ b* value and color difference of sample
Value, and by the △ L* △ a* △ b* value of acquisition, value of chromatism and at this time ink usage deposit database in case subsequent processing and
Analysis；
7) real-time display is carried out to Colorimetry result；
8) relationship analysis that ink usage and color difference quality are carried out using neural network, obtains ink usage and color difference quality
Relational model, feedback regulation is carried out to the ink usage of production line using this model.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
1) the observation ball of this multispectral Online color-difference measurement instrument be placed in above sample to be tested to product carry out data acquisition with
And real-time monitoring, be accurately positioned by position of the position detecting device to sample to be tested, when position detecting device navigate to
Constantly control module controls multispectral instrument progress data acquisition by external trigger mode and is sent to data processing dress sample
It sets and is shown and handled, to improve online quality of colour detection efficiency；
2) present invention carries out control to ink usage according to collected data to color difference the form of quality closed-loop control,
Rejection rate is effectively reduced by the automatic control to ink usage, product quality and production efficiency can be greatly improved.
Detailed description of the invention
Fig. 1 is simplified schematic diagram when multispectral Online color-difference measurement instrument adjusts ink on the printer in the present invention；
Fig. 2 is the structural schematic diagram that ball is observed in the present invention；
Fig. 3 is the structural block diagram of multispectral Online color-difference measurement instrument in the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Referring to Fig.1~Fig. 3, a kind of multispectral Online color-difference measurement instrument, including observation ball 6, shifting axle 5, spectrometer, data
Processing module, control module and position detecting device, wherein
The observation ball 6 includes industrial camera 61, integrating sphere light source 63 and fibre-optical probe 62, the industrial camera 61 it is outer
Shell is mounted on the shifting axle 5, and the integrating sphere light source 63 and the fibre-optical probe 62 are installed in the industrial camera 61
Shell on, and angle formed by the axis of the axis of the fibre-optical probe 62 and 61 camera lens of industrial camera is acute angle, institute
It states industrial camera 61 to connect by serial ports with data processing module, the fibre-optical probe 62 is connected by optical cable and the spectrometer
It connects；
The spectrometer has external trigger module and data transmission module, and the external trigger module and the control module connect
It connects, the data transmission module is connect with the data processing module；
The control module connects the position detecting device, to read the location information of object under test 3 and to determinand
Body 3 is positioned, and is then controlled spectrometer by external trigger module again and is measured.
Further, the industrial camera 61 is installed on the shifting axle 5 by link activity, and such industrial camera 61 is just
Position can be adjusted along the longitudinal sliding motion of shifting axle 5.
Further, the observation ball 6 is provided with that multiple and they are installed on the shifting axle 5, in this way observation ball 6
It can be shot in the big visual angle compared.
Further, the quantity of the spectrometer is consistent with the quantity of the industrial camera 61.Each spectrometer corresponding one
A industrial camera 61, industrial camera 61 are connected with data processing module, the case where for monitoring measurement point and carry out measurement point
Auxiliary positioning avoids the data of read error；The daylighting of industrial camera 61 is similarly from integrating sphere light source 63.
Further, the data processing module includes product selecting module, data acquisition module and real-time monitoring module,
In,
The product selecting module is used to carry out the selection of object under test 3；
The acquisition that the data acquisition module is used to carry out chromatism data is shown comprising color difference chart module, color difference number
According to module and parameter setting module, the color difference chart module is sat for real-time display chromatic curve and in △ L* △ a* △ b*
It marks on a map middle display color difference components, then using the maximum color difference components of the numerical value of acquisition as the reference of adjustment ink usage, wherein △
L* represents luminance deviation, illustrates that sample is brighter than standard sample when taking positive value, on the contrary then darker；It is inclined that △ a* represents red green axis
Difference illustrates that sample is partially redder than standard sample when taking positive value, on the contrary then partially green；△ b* represents champac axis deviation, takes positive value
When illustrate that sample is partially more yellow than standard sample, it is on the contrary then partially blue；The chromatism data module is for showing chromatism data table
Show and the query function of data is provided；The parameter setting module is used for the setting of measurement parameter；
The real-time monitoring module is used to show that the monitored picture that observation ball 6 is passed back and the auxiliary measured a little to be fixed
Position, and alarmed when color difference is more than threshold value by alarm.
Other side according to the invention additionally provides the side of multispectral Online color-difference measurement instrument adjustment ink in printing press
Method, which comprises the following steps:
1) shifting axle 5 is installed in the rack of printing machine；
2) observation ball 6 is moved to 2 top of standard sample to carry out parameter calibration, to determine standard sample L*a*b* value；
3) observation ball 6 is moved to 4 top of standard white plate to carry out white calibration, for determining the L*a* of reference white
B* value；
4) observation ball 6 is moved to measurement position, starts to measure and open production line 1；
5) spectrometer reads reflected light wavelength, to obtain tristimulus values, and then obtains the L*a*b* value of sample；
6) the L*a*b* value of data processing equipment step 2) Plays sample, the L*a*b* value of step 3) Plays white and
The L*a*b* value of sample carries out Colorimetry in step 5), obtains the △ L* △ a* △ b* value and color difference of sample
Value, and by the △ L* △ a* △ b* value of acquisition, value of chromatism and at this time ink usage deposit database in case subsequent processing and
Analysis；
7) real-time display is carried out to calculated result；
8) relationship analysis that ink usage and color difference quality are carried out using neural network, obtains ink usage and color difference quality
Relational model, feedback regulation is carried out to the ink usage of production line 1 using this model.
As shown in Fig. 2, being combined into observation ball 6 by integrating sphere light source 63, industrial camera 61 and fibre-optical probe 62.Such as Fig. 1 institute
Show, observation ball 6 is placed in above sample to be tested, can be moved on shifting axle 5 to measure different location, can on a shifting axle 5
To place multiple observation balls 6.Standard white plate 4 and sample are used for the parameter calibration of multispectral instrument.
As shown in figure 3, the fibre-optical probe 62 of observation ball 6 is connected with spectrometer, spectrometer and industrial camera 61 pass through serial ports
It is connected with data processing module；The external trigger end of spectrometer is connected with control module, and control module passes through position detecting device pair
Measurement point is positioned, and an external trigger signal control spectrometer collection data are issued when navigating to measurement point.Of the invention
Position detecting device is preferably mounted to encoder and photoelectric sensor on production line 1.
Data processing module can carry out the selection of product category, and be carried out in real time by industrial camera 61 to measurement point
Monitoring, carries out data acquisition by spectrometer and is analyzed, real-time display measurement result, and the record of production is stored in backstage
It is for future reference in database.When color difference goes beyond the scope alarm.
The test side of multispectral instrument is connect with fibre-optical probe 62, is placed in right above product, is carried out using integrating sphere light source 63
Illumination, to guarantee the uniform of illumination, is reduced to minimum for illumination bring measurement error.
The external trigger end of multispectral instrument is connect with control module, and control module is using encoder and photoelectric sensor to measurement
Point is positioned, and issuing trigger signal makes spectrometer read data.
Each spectrometer corresponds to an industrial camera 61, and industrial camera 61 is connected with computer, for monitoring measurement point
Situation and the auxiliary positioning for carrying out measurement point, avoid the data of read error.The light source of industrial camera 61 equally uses integrating sphere
Light source 63.
The Survey Software of top layer is developed using c++ and qt quick technology, and cooperation Database Systems carry out production number
According to preservation and analysis work, and measurement is planned as a whole, the interface of multichannel multimetering is provided.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (4)
1. the method for multispectral Online color-difference measurement instrument adjustment ink in printing press, which is characterized in that the multispectral color difference is online
Detector includes observation ball, shifting axle, spectrometer, data processing module, control module and position detecting device, wherein described
Observing ball includes industrial camera, integrating sphere light source and fibre-optical probe, and the shell of the industrial camera is mounted on the shifting axle,
The integrating sphere light source and the fibre-optical probe are installed on the shell of the industrial camera, and the axis of the fibre-optical probe
Angle formed by line and the axis of the industrial camera lens is acute angle, and the industrial camera is connected by serial ports and data processing module
It connects, the fibre-optical probe is connect by optical cable with the spectrometer；There is the spectrometer external trigger module and data to transmit mould
Block, the external trigger module are connect with the control module, and the data transmission module is connect with the data processing module；Institute
It states control module and connects the position detecting device, positioned with reading location information and the measuring targets of object under test,
Then it controls spectrometer by external trigger module again to measure, the position detecting device is the coding of installation in the production line
Device and photoelectric sensor；The data processing module includes product selecting module, data acquisition module and real-time monitoring module, institute
Product selecting module is stated for carrying out the selection of object under test；The acquisition that the data acquisition module is used to carry out chromatism data is aobvious
Show comprising color difference chart module, chromatism data module and parameter setting module, the color difference chart module are used for real-time display
Chromatic curve and △ L* △ a* △ b* color difference components are shown in △ L* △ a* △ b* coordinate diagram, then the numerical value of acquisition is maximum
Color difference components as adjustment ink usage reference, wherein △ L* represents luminance deviation, illustrates sample when taking positive value
It is brighter than standard sample, it is on the contrary then darker；△ a* represents red green axis deviation, illustrates that sample is more inclined than standard sample when taking positive value
It is red, it is on the contrary then partially green；△ b* represents champac axis deviation, illustrates that sample is partially more yellow than standard sample when taking positive value, on the contrary then inclined
It is blue；The chromatism data module is for showing chromatism data table and providing the query function of data；The parameter setting
Module is used for the setting of measurement parameter；The real-time monitoring module is used to show the monitored picture and surveyed that observation ball is passed back
The auxiliary positioning of point is measured, and is alarmed when color difference is more than threshold value by alarm；Method includes the following steps:
1) shifting axle is installed in the rack of printing machine；
2) observation ball is moved to above standard sample to carry out parameter calibration, to determine standard sample L*a*b* value；
3) observation ball is moved to above standard white plate to carry out white calibration, for determining the L*a*b* value of reference white；
4) observation ball is moved to measurement position, starts to measure and opens production line；
5) spectrometer reads reflected light wavelength, to obtain tristimulus values, and then obtains the L*a*b* value of sample；
6) data processing equipment according to the L*a*b* value of step 2) Plays sample, the L*a*b* value of step 3) Plays white and
The L*a*b* value of sample carries out Colorimetry in step 5), obtains the △ L* △ a* △ b* value and color difference of sample
Value, and by the △ L* △ a* △ b* value of acquisition, value of chromatism and at this time ink usage deposit database in case subsequent processing and
Analysis；
7) real-time display is carried out to Colorimetry result；
8) relationship analysis that ink usage and color difference quality are carried out using neural network, obtains the pass of ink usage and color difference quality
It is model, carries out feedback regulation using ink usage of this model to production line.
2. the method for multispectral Online color-difference measurement instrument adjustment ink in printing press according to claim 1, which is characterized in that
The industrial camera is installed on the shifting axle by link activity.
3. the method for multispectral Online color-difference measurement instrument adjustment ink in printing press according to claim 1, which is characterized in that
The observation ball is provided with that multiple and they are installed on the shifting axle.
4. the method for multispectral Online color-difference measurement instrument adjustment ink in printing press according to claim 3, which is characterized in that
The quantity of the spectrometer is consistent with the quantity of the industrial camera.
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| WO2022037062A1 (en) * | 2020-08-17 | 2022-02-24 | 武汉钢铁有限公司 | On-line color difference measurement system and method |
| CN113485700B (en) * | 2021-07-07 | 2022-06-28 | 华中科技大学鄂州工业技术研究院 | Design method and device of optical-mechanical-electrical modular control software based on Qt |
| CN113777056A (en) * | 2021-08-13 | 2021-12-10 | 昆山格博尔智能科技有限责任公司 | Ink color matching detection method based on multispectral CMOS image chip |
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| CN102607704A (en) * | 2012-03-20 | 2012-07-25 | 苏州大学 | Color measuring device and method for colored holographic picture |
| CN104568154A (en) * | 2014-12-25 | 2015-04-29 | 北京凌云光技术有限责任公司 | Printed matter color quality detection method and system |
| CN104848943A (en) * | 2015-05-18 | 2015-08-19 | 上海新纤仪器有限公司 | Textile chroma and color difference testing device and testing method thereof |
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| CN102466520B (en) * | 2010-11-11 | 2014-12-17 | 香港纺织及成衣研发中心 | Multispectral imaging color measurement system and imaging signal processing method thereof |
| US9747681B2 (en) * | 2013-03-27 | 2017-08-29 | Prosper Creative Co., Ltd. | Measuring apparatus, measurement method, information processing apparatus, and measurement program |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607704A (en) * | 2012-03-20 | 2012-07-25 | 苏州大学 | Color measuring device and method for colored holographic picture |
| CN104568154A (en) * | 2014-12-25 | 2015-04-29 | 北京凌云光技术有限责任公司 | Printed matter color quality detection method and system |
| CN104848943A (en) * | 2015-05-18 | 2015-08-19 | 上海新纤仪器有限公司 | Textile chroma and color difference testing device and testing method thereof |
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