WO2022037062A1 - 在线色差检测***及检测方法 - Google Patents

在线色差检测***及检测方法 Download PDF

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Publication number
WO2022037062A1
WO2022037062A1 PCT/CN2021/082741 CN2021082741W WO2022037062A1 WO 2022037062 A1 WO2022037062 A1 WO 2022037062A1 CN 2021082741 W CN2021082741 W CN 2021082741W WO 2022037062 A1 WO2022037062 A1 WO 2022037062A1
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sample
colorimeter
reflected light
tested
standard
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PCT/CN2021/082741
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English (en)
French (fr)
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周小舟
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武汉钢铁有限公司
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Priority claimed from CN202010825184.0A external-priority patent/CN111811654A/zh
Priority claimed from CN202021716198.0U external-priority patent/CN212621091U/zh
Application filed by 武汉钢铁有限公司 filed Critical 武汉钢铁有限公司
Priority to US17/764,986 priority Critical patent/US20220357270A1/en
Publication of WO2022037062A1 publication Critical patent/WO2022037062A1/zh

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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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/251—Colorimeters; Construction thereof
    • 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
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • 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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274—Calibration, base line adjustment, drift correction

Definitions

  • the invention belongs to the field of color difference detection, and more particularly, relates to an online color difference detection system and a detection method.
  • chromatic aberration include front and rear chromatic aberration, local chromatic aberration, chromatic aberration in the same batch of coils, and chromatic aberration between different batches.
  • CIE XYZ CIE XYZ
  • Hunterlab lab CIE l*a*b*
  • All color-related industries in the world refer to this standard as a quantification and judgment index.
  • EN13523, ASTM D2244, ISO7724, JIS Z8730 and GB/T13448 all use Hunterlab lab and CIE l*a*b* chromaticity space standards.
  • the visual inspection method must not only have a suitable environment and a light source that meets the requirements, but also require that the grader has normal vision, undergoes strict training, and has rich experience in color discrimination.
  • the human eye is easily fatigued and easily interfered by various factors, so that the detected results often fail to meet the requirements.
  • Color difference detection is a monotonous and heavy repetitive labor for workers, which is labor-intensive.
  • the detection results will be affected by the experience, proficiency and some subjective factors of the inspectors, lack of consistency and reliability, and the detection results will easily make the upstream and downstream of the industry. Conflicts and disputes arose between them.
  • Another method of local sampling is the color difference standard release and arbitration method defined in various standards in the world.
  • the off-line automation of unit local sampling is low, the detection speed is slow, and the production cycle is increased. And the representativeness of sampling is poor, which cannot reflect the color difference index of all products.
  • the existing online equipment has problems such as inconsistency between the measured value and the offline desktop colorimeter value, drift of the measured value data, and inability to automatically calibrate, so it can only be used as a display reference and cannot be used as a test data that has the level of product test release and quality assurance. .
  • the present invention proposes an online color difference detection system and detection method. Adjusted so that the error between the reflected light received by the reflected light measuring device of the offline benchtop colorimeter and the angle of the vertical line of the sample to be tested is within plus or minus 1 degree, and then the product can be obtained as a product that can be released and recorded in the quality assurance certificate. Test data.
  • an online color difference detection system including: an online non-contact color difference meter and a bracket;
  • the online non-contact colorimeter is located on the support, and the light source emitted by the online non-contact colorimeter is directed to the sample to be tested, so as to perform color difference detection on the sample to be tested;
  • the angle between the reflected light received by the reflected light measuring device of the online non-contact colorimeter and the vertical line of the sample to be tested is the difference between the angle of the reflected light received by the reflected light measuring device of the offline desktop colorimeter and the vertical line of the tested sample.
  • the error is within plus or minus 1 degree.
  • the inclination angle of the online non-contact colorimeter is adjusted, so that the angle between the reflected light received by the reflected light measuring device of the online non-contact colorimeter and the perpendicular to the sample to be measured is the same as the reflection of the offline desktop colorimeter.
  • the error between the reflected light received by the light measuring device and the angle of the perpendicular to the sample to be measured is within plus or minus 1 degree.
  • the angle between the reflected light received by the reflected light measuring device of the online non-contact colorimeter and the perpendicular to the sample to be measured is the angle between the reflected light received by the reflected light measuring device of the offline benchtop colorimeter and the perpendicular to the measured sample Consistent.
  • the system further comprises: an automatic verification device;
  • the automatic calibration device is connected with the online non-contact colorimeter, and is used to control the online non-contact colorimeter to move above the calibration standard in the automatic calibration device according to a first preset period, so as to The on-line non-contact colorimeter is calibrated by the measured calibration standard data.
  • the system further comprises: an automatic standard sample device;
  • the automatic standard sample device is connected with the online non-contact colorimeter, and is used for controlling the online non-contact colorimeter to move above the calibration standard in the automatic sample standard device according to a second preset period, so as to The on-line non-contact colorimeter is made to update the target value with the measured calibration target data.
  • the automatic standard sample device is used to control the movement of the on-line non-contact colorimeter, so that the on-line non-contact colorimeter uses a light source to illuminate the standard sample, and converts it to use L 0 under the CIE LAB standard.
  • a 0 and b 0 values are used as standard sample data, and the standard sample data is stored in the standard sample value in the database.
  • the on-line non-contact colorimeter is further configured to issue an alarm signal when the average color difference of any area in the tested sample exceeds the preset threshold, and simultaneously record the color difference information and the lateral sum of the area.
  • Vertical coordinate the average color difference of any area in the tested sample exceeds the preset threshold
  • the on-line non-contact colorimeter is also used to save the color difference information of the tested sample in the database, so as to facilitate information query.
  • an online color difference detection method comprising:
  • the error between the angle and the reflected light received by the reflected light measuring device of the off-line desktop colorimeter and the angle of the vertical line of the tested sample is within plus or minus 1 degree;
  • the light source emitted by the online non-contact colorimeter is directed to the sample to be tested, so as to perform color difference detection on the sample to be tested.
  • the method further includes:
  • the online non-contact colorimeter is controlled to move above the calibration standard in the automatic calibration device according to a first preset cycle, so that the online non-contact colorimeter passes the measured calibration standard. sample data for correction.
  • the method further includes:
  • the on-line non-contact colorimeter is controlled to move above the calibration standard in the automatic standard device according to the second preset cycle by the automatic standard device, so that the on-line non-contact colorimeter passes the measured calibration standard.
  • the sample data updates the target value.
  • the online non-contact colorimeter can regularly measure the corresponding standard sample data during measurement, and constantly refresh the standard sample value in the system. Therefore, the drift direction of the standard sample value and the measured value is consistent, and the measured value can be solved. The problem of data drift can greatly improve the accuracy of the measured value
  • the on-line color difference detection system and method that can be used as product release standard detection can be realized and integrated through the present invention, which can realize accurate, continuous and effective color difference value detection on products, and improve the accuracy and objectivity of product quality monitoring and release, Reduce labor intensity.
  • FIG. 1 is a schematic structural diagram of an online color difference detection system provided by an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of angle adjustment of an online non-contact colorimeter provided by an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an online color difference detection system provided by an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of an online color difference detection method provided by an embodiment of the present invention.
  • 1 is an online non-contact colorimeter
  • 2 is a transverse moving beam
  • 3 is a column
  • 4 is a sample that is tested continuously running
  • 5 is an automatic calibration device
  • 6 is an automatic standard device
  • 7 is an offline desktop color difference 8
  • 9 is the reflected light measuring instrument
  • 10 is the sample reflected light.
  • FIG. 1 is a schematic structural diagram of an online color difference detection system provided by an embodiment of the present invention, including: an online non-contact color difference meter 1 and a support;
  • the online non-contact colorimeter 1 is located on the bracket, and the light source emitted by the online non-contact colorimeter 1 points to the sample 4 to be tested, and the online non-contact colorimeter 1 moves laterally on the bracket to detect the color difference of the sample 4 to be tested. ;
  • the bracket includes: a transverse moving beam 2 and a column 3; the column 3 is used to support the transverse moving beam 2, and the online non-contact colorimeter 1 is installed on the transverse moving beam 2. on the beam 2, and can move laterally on the traverse moving beam 2.
  • the angle between the reflected light 10 received by the reflected light measuring device 9 of the online non-contact colorimeter 1 and the perpendicular to the sample 4 to be tested is the same as the reflected light received by the reflected light measuring device of the offline desktop colorimeter 7
  • the error between the angle with the perpendicular line of the sample 4 to be tested is within plus or minus 1 degree.
  • the angle of the reflected light received by the reflected light measuring device 9 of the online non-contact colorimeter 1 and the perpendicular to the sample 4 to be tested is the same as the angle of the offline desktop colorimeter 7.
  • the angle error between the reflected light received by the reflected light measuring device and the vertical line of the sample 4 to be tested is within plus or minus 1 degree.
  • the angle of the reflected light received by the reflected light measuring device 9 of the online non-contact colorimeter 1 and the perpendicular to the sample 4 to be tested is the same as the offline desktop colorimeter.
  • the reflected light received by the reflected light measuring device 7 is consistent with the angle of the vertical line of the sample 4 to be tested.
  • the on-line non-contact colorimeter 1 uses the LED light source 8 to illuminate the sample, the reflected light measuring device 9 receives the reflected light of the sample to be measured, and the lens in the on-line non-contact colorimeter 1 collects the reflected light and directly hits the Diffraction gratings. Diffraction gratings split the received reflected light into component wavelengths of light that are measured and converted into useful color data by a matrix of silicon diodes.
  • FIG. 2 is a schematic diagram of the angle adjustment of an online non-contact colorimeter provided by the embodiment of the present invention.
  • the measured value of the offline desktop colorimeter is used as the industry standard, according to the regulations in the national standard.
  • the angle of the offline benchtop colorimeter is used to adjust the online non-contact colorimeter.
  • the reflected light measuring device 9 of the online non-contact colorimeter 1 The error between the angle of the received reflected light 10 and the perpendicular to the sample 4 under test and the angle of the reflected light received by the reflected light measuring device of the offline benchtop colorimeter 7 and the perpendicular to the tested sample 4 is within plus or minus 1 degree.
  • the angle of the reflected light received by the reflected light measuring device 9 of the online non-contact colorimeter 1 and the perpendicular to the sample 4 to be measured is measured with the reflected light of the offline desktop colorimeter 7.
  • the angle error between the reflected light received by the detector 9 and the sample 4 under test is within plus or minus 1 degree.
  • the system also includes: an automatic calibration device 5 and an automatic standard sample device 6;
  • the automatic calibration device 5 is connected with the online non-contact colorimeter 1, and is used to control the online non-contact colorimeter 1 to move above the calibration standard in the automatic calibration device 5 according to the first preset cycle, so that the online non-contact colorimeter 1 is moved
  • the colorimeter 1 is calibrated by the measured calibration standard data
  • the first preset period may be determined according to actual needs, which is not uniquely limited in this embodiment of the present invention. For example, set the time interval or the number of meters to be detected, so that every first preset period, the online non-contact colorimeter 1 is moved to the top of the calibration standard in the automatic calibration device 5, The online non-contact colorimeter 1 collects the calibration standard sample data, and then performs calibration through the measured calibration standard sample data.
  • the online non-contact colorimeter 1 can be regularly calibrated by the automatic calibration device 5 to correct the measurement accuracy of the head of the online non-contact colorimeter 1 .
  • the automatic standard device 6 is connected to the online non-contact colorimeter 1, and is used to control the online non-contact colorimeter 1 to move to the top of the calibration standard in the automatic standard device 6 according to the second preset cycle, so as to make the online non-contact colorimeter 1 move above the calibration standard.
  • the colorimeter 1 updates the target value through the measured calibration target data.
  • the second preset period may be determined according to actual needs, and is not uniquely limited in this embodiment of the present invention. For example, setting the time interval or the number of meters to be detected and other variables are set, so that every first preset period, the online non-contact colorimeter 1 is moved above the calibration standard in the automatic standard device 6, The online non-contact colorimeter 1 collects the calibration standard data, and then refreshes the original standard data according to the measured calibration standard data.
  • the standard sample value can be updated regularly through the automatic standard sample device 6 to correct the measurement accuracy of the online non-contact colorimeter 1 .
  • the extraction of color features and the calculation of color difference can be based on the CIE LAB color space model.
  • CIE LAB uses the L, a and b coordinate axes to define the CIE color space, and all colors can use the three L, a, and b axes to define the CIE color space. numerical representation.
  • the lightness index L (brightness axis) represents black and white, 0 is black, 100 is white, and between 0 and 100 is gray;
  • the product index b yellow-blue axis
  • the positive value is yellow
  • the negative value is blue.
  • the automatic standard sample device 6 is used to control the movement of the on-line non-contact colorimeter, so that the on-line non-contact colorimeter uses the LED light source to illuminate the standard sample, and converts it to use L 0 under the CIE LAB standard.
  • a 0 and b 0 values are used as the standard data, and the standard data is stored in the standard value in the database.
  • the online non-contact colorimeter 1 is used to perform multi-point continuous scanning detection on the moving sample to be tested, and use an LED light source to illuminate the sample to be tested, and convert it to use L under the CIE LAB standard,
  • the a and b values are used as the measured values, and the difference ⁇ L between the L value of the tested sample and the standard sample value L 0 is obtained respectively, the difference ⁇ a between the a value of the tested sample and the standard sample value a 0 , the tested sample
  • the preset threshold is the threshold when the product is qualified, and can be determined according to the actual situation.
  • the online non-contact colorimeter 1 is also used to issue an alarm signal when the average color difference of any area in the tested sample 4 exceeds a preset threshold, and simultaneously record the color difference information and the horizontal and vertical coordinates of the area.
  • the online non-contact colorimeter 1 is also used to save the color difference information of the sample 4 to be tested in the database, so as to facilitate information query.
  • the invention realizes and integrates an online color difference detection system and method that can be used as a product release standard detection, can realize accurate, continuous and effective color difference value detection on products, improve the accuracy and objectivity of product quality monitoring and release, and reduce manual labor. strength.
  • FIG. 4 is a schematic flowchart of an online color difference detection method provided by an embodiment of the present invention, including:
  • the method also includes:
  • the automatic calibration device 5 controls the movement of the online non-contact colorimeter 1 to move above the calibration standard in the automatic calibration device 5 according to the first preset period, so that the online non-contact colorimeter 1 passes the measured calibration standard. sample data for correction.
  • the method also includes:
  • the online non-contact colorimeter 1 is controlled to move above the calibration standard in the automatic standard device 6 according to the second preset cycle by the automatic standard device 6, so that the online non-contact colorimeter 1 passes the measured calibration standard Data update target value.
  • the movement of the online non-contact colorimeter 1 is controlled by the automatic standard device 6, so that the online non-contact colorimeter 1 uses the LED light source to illuminate the standard sample, and converts it to use L 0 under the CIE LAB standard.
  • a 0 and b 0 values are used as the standard data, and the standard data is stored in the standard value in the database.
  • the above method further includes: when the average color difference of any area in the tested sample exceeds a preset threshold by the online non-contact colorimeter 1, an alarm signal is issued, and the color difference information and the horizontal direction of the area are recorded at the same time. and vertical coordinates.
  • the above method further includes: storing the color difference information of the tested sample in the database by the online non-contact colorimeter 1, so as to facilitate information query.
  • the invention realizes and integrates an online color difference detection method that can be used as a product release standard detection, can realize accurate, continuous and effective color difference value detection on products, improve the accuracy and objectivity of product quality monitoring and release, and reduce labor intensity.
  • the C409 color coating unit of a steel company's cold rolling plant has been tested online according to this plan, and a total of hundreds of colors have been tested.
  • the material speed is stable from 30-230 m/min, and the equipment operation stability reaches more than 99.5%.
  • the measured value and sampling The offline laboratory comparison meets the accuracy range required in EN13523, ASTM D2244, ISO7724, JIS Z8730 and GB/T13448.
  • the measurement repeatability ⁇ E fluctuation is less than 0.1, and the error between the off-line laboratory product release measurement ⁇ E is less than 0.2, achieving a technological breakthrough in this field.
  • the system is less disturbed by the external environment, and has the advantages of high detection accuracy, fast speed and good stability.
  • Table 1 The experimental results are shown in Table 1 below.
  • the sea blue standard sample* is the standard sample value
  • the sea blue sample is the sample to be tested
  • the error ⁇ E between the ⁇ E obtained by the online color difference detection system of the present invention and the offline equipment fluctuates less than 0.1, which satisfies the product release of the offline laboratory.
  • the error between measurements of ⁇ E is less than the release criterion of 0.2.

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Abstract

一种在线色差检测***及检测方法，属于色差检测领域，***包括：在线非接触式色差仪(1)及支架；在线非接触式色差仪(1)位于支架上，且在线非接触式色差仪(1)发射出的光源指向被测样品(4)，以对被测样品(4)进行色差检测；其中，在线非接触式色差仪(1)的反射光测量器(9)接收的反射光线(10)与被测样品(4)垂线的角度与离线台式色差仪(7)的反射光测量器接收的反射光线与被测样品(4)垂线的角度之间的误差在正负1度以内。通过将在线非接触式色差仪(1)测量值调校成与离线台式色差仪(7)测量数值一致，提高测量值的准确性，进而获取可作为具备产品检测放行和记入质保书级别的检测数据。

Description

在线色差检测***及检测方法 技术领域
本发明属于色差检测领域，更具体地，涉及一种在线色差检测***及检测方法。
背景技术
随着世界经济的高速发展，社会生活水平的显著提高，人们对商品多元化需求分类细化。
在冶金、造纸、塑料、皮革及布匹等卷材印染行业中，测定染色卷材之间的色差在工业生产中有着相当重要的意义，特别是生产厂产品与标准样品之间的色差是质量管理的一项核心指标。
同时，常见的色差类别有前后色差，局部色差，同批次卷材中会产生色差，不同批次间也会产生色差。目前世界上色彩的量化主要有三种指标模式：CIE XYZ,Hunterlab lab和CIE l*a*b*为全球开始采用。世界上各与颜色相关的行业均引用此标准作为量化和判定指标，例如EN13523、ASTM D2244、ISO7724、JIS Z8730和GB/T13448中均使用Hunterlab lab和CIE l*a*b*色度空间标准。
目前，世界上所有卷材印染行业的色差检测环节仍依靠人眼目测完成和进行局部抽样使用专业的测色仪进行接触式的离线测量两种形式进行。
这两种形式中目测方法除了必须有适宜的环境和符合要求的光源外，而且还要求评级人视力正常，且经过严格训练，有丰富的辨色经验。除此之外人眼容易疲劳，易受多种因素干扰，从而使检测出来的结果很多时候不能达到要求。色差检测对工人来说是一种单调繁重的重复性劳动，劳动强度大。更为关键的是，人眼检测以及通过色差仪的离线检测，检测结果 都会受检验人员的经验、熟练程度以及一些主观因素的影响，缺乏一致性和可靠性，检测结果容易使产业上下游之间产生矛盾和纠纷。
另外一种局部抽样的方法也是目前世界上各类标准中定义的色差标准放行和仲裁方法，单位局部取样进行离线的自动化程度低，检测速度慢，增加了生产周期。并且取样代表性差，不能反映全部产品的色差指标情况。
现有的在线设备存在测量值与离线台式色差仪数值不一致、测量值数据漂移、无法自动校验等问题，因此仅能作为显示参考而无法作为具备产品检测放行和记入质保书级别的检测数据。
因此，为适应全球工业现代化发展的需要，研究一种在线色差检测***和方法对推动世界在线色差检测技术尤为重要。
发明内容
针对现有技术的以上缺陷或改进需求，本发明提出了一种在线色差检测***及检测方法，通过将在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度调整成与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度之间的误差在正负1度以内，进而获取可作为具备产品检测放行和记入质保书级别的检测数据。
为实现上述目的，按照本发明的一个方面，提供了一种在线色差检测***，包括：在线非接触式色差仪及支架；
所述在线非接触式色差仪位于所述支架上，且所述在线非接触式色差仪发射出的光源指向被测样品，以对所述被测样品进行色差检测；
其中，所述在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度之间的误差在正负1度以内。
优选地，调整所述在线非接触式色差仪的倾斜角度，以使所述在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度之间 的误差在正负1度以内。
优选地，所述在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度一致。
优选地，所述***还包括：自动校验装置；
所述自动校验装置与所述在线非接触式色差仪连接，用于按照第一预设周期控制所述在线非接触式色差仪移动至所述自动校验装置中的校正标样上方，以使所述在线非接触式色差仪通过测量的校正标样数据进行校正。
优选地，所述***还包括：自动标样装置；
所述自动标样装置与所述在线非接触式色差仪连接，用于按照第二预设周期控制所述在线非接触式色差仪移动至所述自动标样装置中的校正标样上方，以使所述在线非接触式色差仪通过测量的校正标样数据更新标样值。
优选地，所述自动标样装置，用于控制所述在线非接触式色差仪的移动，以使所述在线非接触式色差仪使用光源照射标样样品，转换成CIE LAB标准下使用L 0，a 0和b 0值作为标样数据，并将所述标样数据存入数据库中的标样值中。
优选地，所述在线非接触式色差仪在所述支架上横向移动，以对移动的所述被测样品进行多点连续扫描检测，并使用光源照射所述被测样品，转换成CIE LAB标准下使用L，a和b值作为测量值，并分别获取所述被测样品的L值与所述标样值L 0之间差值ΔL，所述被测样品的a值与所述标样值a 0之间差值Δa，所述被测样品的b值与所述标样值b 0之间差值Δb，并由ΔE＝(ΔL 2+Δa 2+Δb 2) 1/2得到平均色差ΔE，根据所述平均色差ΔE与预设阈值之间的关系判断所述被测样品是否合格。
优选地，所述在线非接触式色差仪，还用于在所述被测样品中任意一块区域的平均色差超过所述预设阈值时，发出警报信号，同时记录色差信 息和该区域的横向和纵向坐标。
优选地，所述在线非接触式色差仪，还用于将所述被测样品的色差信息保存在所述数据库中，以便于信息查询。
按照本发明的另一方面，提供了一种在线色差检测方法，包括：
调整在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度，使得所述在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度之间的误差在正负1度以内；
所述在线非接触式色差仪发射出的光源指向被测样品，以对所述被测样品进行色差检测。
优选地，所述方法还包括：
通过自动校验装置按照第一预设周期控制所述在线非接触式色差仪移动至所述自动校验装置中的校正标样上方，以使所述在线非接触式色差仪通过测量的校正标样数据进行校正。
优选地，所述方法还包括：
通过自动标样装置按照第二预设周期控制所述在线非接触式色差仪移动至所述自动标样装置中的校正标样上方，以使所述在线非接触式色差仪通过测量的校正标样数据更新标样值。
总体而言，通过本发明所构思的以上技术方案与现有技术相比，能够取得下列有益效果：
(1)通过将在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度调教成与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度之间的误差在正负1度以内，以使在线非接触式色差仪测量值与离线台式色差仪测量值满足误差要求，提高测量值的准确性，进而获取可作为具备产品检测放行和记入质保书级别的检测数据。
(2)采用自动校验装置使在线非接触式色差仪在测量时可以定期进行 标定以大幅提高测量值的准确性。
(3)通过自动标样装置使在线非接触式色差仪在测量时可以定期测量对应标样数据，不断刷新***内的标样值，因此标样值和测量值的漂移方向一致，解决测量值数据的漂移问题，可以大幅提高测量值的准确性
(4)通过本发明来实现和集成可作为产品放行标准检测的在线色差检测***和方法，可实现产品上准确连续有效进行色差值检测，提升产品质量监控和放行的准确性和客观性，降低人工劳动强度。
附图说明
图1是本发明实施例提供的一种在线色差检测***的结构示意图；
图2是本发明实施例提供的一种在线非接触式色差仪角度调校示意图；
图3是本发明实施例提供的一种在线色差检测***的结构示意图；
图4是本发明实施例提供的一种在线色差检测方法的流程示意图；
其中，1为在线非接触式色差仪，2为横移移动横梁，3为立柱，4为被测连续运行的样品，5为自动校验装置，6为自动标样装置，7为离线台式色差仪，8为色差仪光源，9为反射光测量器，10为样品反射光。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。此外，下面所描述的本发明各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。
在本发明实例中，“第一”、“第二”等是用于区别不同的对象，而不必用于描述特定的顺序或先后次序。
实施例一
如图1所示是本发明实施例提供的一种在线色差检测***的结构示意图，包括：在线非接触式色差仪1及支架；
在线非接触式色差仪1位于支架上，且在线非接触式色差仪1发射出的光源指向被测样品4，在线非接触式色差仪1在支架上横向移动以对被测样品4进行色差检测；
作为一种优选的实施方式，如图1所示，该支架包括：横移移动横梁2及立柱3；立柱3用于支撑横移移动横梁2，在线非接触式色差仪1安装在横移移动横梁2上，且可以在横移移动横梁2上进行横向移动。
如图2所示，其中，在线非接触式色差仪1的反射光测量器9接收的反射光线10与被测样品4垂线的角度与离线台式色差仪7的反射光测量器接收的反射光线与被测样品4垂线的角度之间的误差在正负1度以内。
进一步地，通过调整在线非接触式色差仪1的倾斜角度，以使在线非接触式色差仪1的反射光测量器9接收的反射光线与被测样品4垂线的角度与离线台式色差仪7的反射光测量器接收的反射光线与被测样品4垂线的角度误差在正负1度以内。
更进一步地，通过调整在线非接触式色差仪1的倾斜角度，以使在线非接触式色差仪1的反射光测量器9接收的反射光线与被测样品4垂线的角度与离线台式色差仪7的反射光测量器接收的反射光线与被测样品4垂线的角度一致。
在本发明实施例中，在线非接触式色差仪1使用LED光源8照射样品，反射光测量器9接收被测样品的反射光，在线非接触式色差仪1内透镜收集反射的光直接射到衍射光栅，衍射光栅将接收到的反射光分光成各组分波长的光，这些散射光被硅二极管矩阵测量并转换成有用的颜色数据。
在本发明实施例中，如图2所示是本发明实施例提供的一种在线非接触式色差仪角度调校示意图，目前离线台式色差仪的测量值被作为行业标准，根据国标里面规定的离线台式色差仪的角度，对在线非接触式色差仪进行调校。为保证在线非接触色差仪1测量数据与离线台式色差仪7的测量数据满足误差要求，从而可以作为产品放行标准检测的在线色差检测系 统，调整在线非接触式色差仪1的反射光测量器9接收的反射光线10与被测样品4垂线的角度与离线台式色差仪7的反射光测量器接收的反射光线与被测样品4垂线的角度之间的误差在正负1度以内。例如：如果离线台式色差仪7的反射光测量器9接收的反射光线与被测样品4垂线的角度和在线非接触色差仪1的反射光测量器9接收的反射光线与被测样品4垂线的角度相差较大时，需要对在线非接触色差仪1机头角度进行调整至误差在正负1度以内。如图2所示，具体调整量为：角C＝角a-角b，使得角d＝角a±1°。
也就是说，通过调整在线非接触色差仪1的角度使得在线非接触色差仪1的反射光测量器9接收的反射光线与被测样品4垂线的角度与离线台式色差仪7的反射光测量器9接收的反射光线与被测样品4的角度误差在正负1度以内。
如图3所示，该***还包括：自动校验装置5及自动标样装置6；
自动校验装置5与在线非接触式色差仪1连接，用于按照第一预设周期控制在线非接触式色差仪1移动至自动校验装置5中的校正标样上方，以使在线非接触式色差仪1通过测量的校正标样数据进行校正；
其中，第一预设周期可以根据实际需要确定，本发明实施例不做唯一性限定。如设定隔多长时间或者检测多少米数等变量进行设定，这样每隔第一预设周期，就将在线非接触式色差仪1移动至自动校验装置5中的校正标样上方，在线非接触式色差仪1就采集校正标样数据，进而通过测量的校正标样数据进行校正。
在本发明实施例中，通过自动校验装置5可以使在线非接触式色差仪1定期进行校验，修正在线非接触式色差仪1机头的测量准确性。
自动标样装置6与在线非接触式色差仪1连接，用于按照第二预设周期控制在线非接触式色差仪1移动至自动标样装置6中的校正标样上方，以使在线非接触式色差仪1通过测量的校正标样数据更新标样值。
其中，第二预设周期可以根据实际需要确定，本发明实施例不做唯一性限定。如设定隔多长时间或者检测多少米数等变量进行设定，这样每隔第一预设周期，就将在线非接触式色差仪1移动至自动标样装置6中的校正标样上方，在线非接触式色差仪1就采集校正标样数据，进而根据测量的校正标样数据刷新原有的标样数据。
通过自动标样装置6可以定期更新标样值，修正在线非接触式色差仪1的测量准确性。
在本发明实施例中，颜色特征的提取以及色差的计算可以基于CIE LAB颜色空间模型，CIE LAB使用L，a和b坐标轴定义CIE颜色空间，所有颜色都可以用L、a、b这三个数值表示。其中，明度指数L(亮度轴)，表示黑白，0为黑色，100为白色，0～100之间为灰色；色品指数a(红绿轴)，正值为红色，负值为绿色；色品指数b(黄蓝轴)，正值为黄色，负值为蓝色。
在本发明实施例中，自动标样装置6，用于控制在线非接触式色差仪的移动，以使在线非接触式色差仪使用LED光源照射标样样品，转换成CIE LAB标准下使用L 0，a 0和b 0值作为标样数据，并将标样数据存入数据库中的标样值中。
在本发明实施例中，在线非接触式色差仪1，用于对移动的被测样品进行多点连续扫描检测，并使用LED光源照射所述被测样品，转换成CIE LAB标准下使用L，a和b值作为测量值，并分别获取被测样品的L值与标样值L 0之间差值ΔL，被测样品的a值与标样值a 0之间差值Δa，被测样品的b值与标样值b 0之间差值Δb，并由ΔE＝(ΔL 2+Δa 2+Δb 2) 1/2得到平均色差ΔE，根据平均色差ΔE与预设阈值之间的关系判断所述被测样品是否合格。
其中，预设阈值是设定产品合格时的阈值，可以根据实际情况确定。
进一步地，在线非接触式色差仪1，还用于在被测样品4中任意一块区域的平均色差超过预设阈值时，发出警报信号，同时记录色差信息和该区域的横向和纵向坐标。
进一步地，在线非接触式色差仪1，还用于将被测样品4的色差信息保存在数据库中，以便于信息查询。
通过本发明来实现和集成可作为产品放行标准检测的在线色差检测***和方法，可实现产品上准确连续有效进行色差值检测，提升产品质量监控和放行的准确性和客观性，降低人工劳动强度。
实施例二
图4是本发明实施例提供的一种在线色差检测方法的流程示意图，包括：
S1：将在线非接触式色差仪1的反射光测量器接收的反射光线与被测样品4垂线的角度调校成与离线台式色差仪7的反射光测量器接收的反射光线与被测样品4垂线角度之间的误差在正负1度以内；
S2：在线非接触式色差仪1发射出的光源指向被测样品4，以对被测样品4进行色差检测。
进一步地，该方法还包括：
通过自动校验装置5按照第一预设周期控制在线非接触式色差仪1的移动移动至自动校验装置5中的校正标样上方，以使在线非接触式色差仪1通过测量的校正标样数据进行校正。
进一步地，该方法还包括：
通过自动标样装置6按照第二预设周期控制在线非接触式色差仪1的移动至自动标样装置6中的校正标样上方，以使在线非接触式色差仪1通过测量的校正标样数据更新标样值。
在本发明实施例中，通过自动标样装置6控制在线非接触式色差仪1的移动，以使在线非接触式色差仪1使用LED光源照射标样样品，转换成CIE LAB标准下使用L 0，a 0和b 0值作为标样数据，并将标样数据存入数据库中的标样值中。
在本发明实施例中，通过在线非接触式色差仪1，用于对移动的被测样 品进行多点连续扫描检测，并使用LED光源照射被测样品，转换成CIE LAB标准下使用L，a和b值作为测量值，并分别获取被测样品的L值与标样值L 0之间差值ΔL，被测样品的a值与标样值a 0之间差值Δa，被测样品的b值与标样值b 0之间差值Δb，并由ΔE＝(ΔL 2+Δa 2+Δb 2) 1/2得到平均色差ΔE，根据平均色差ΔE与预设阈值之间的关系判断所述被测样品是否合格。
在本发明实施例中，上述方法还包括：由在线非接触式色差仪1在被测样品中任意一块区域的平均色差超过预设阈值时，发出警报信号，同时记录色差信息和该区域的横向和纵向坐标。
在本发明实施例中，上述方法还包括：由在线非接触式色差仪1将被测样品的色差信息保存在数据库中，以便于信息查询。
通过本发明来实现和集成可作为产品放行标准检测的在线色差检测方法，可实现产品上准确连续有效进行色差值检测，提升产品质量监控和放行的准确性和客观性，降低人工劳动强度。
实施例三
某钢铁公司冷轧厂C409彩涂机组按此方案进行在线测试，共测试上百种颜色，材料速度从30-230米/分下运行稳定，设备运行稳定性达到99.5％以上，测量值与取样离线检验室比对满足EN13523、ASTM D2244、ISO7724、JIS Z8730和GB/T13448中要求的精度范围。测量重复性ΔE波动小于0.1，与离线检验室产品放行测量ΔE之间的误差小于0.2，实现该领域的技术颠覆性突破。***受外界环境干扰较小，具有检测精度高、速度快、稳定性好的优点。实验结果如下表1所示。
表1
Figure PCTCN2021082741-appb-000001
Figure PCTCN2021082741-appb-000002
其中，表1中，海蓝标样*是标样值，海蓝试样是待检测样本，采用本发明的在线色差检测***得到的ΔE与离线设备的误差ΔE波动小于0.1，满足离线检验室产品放行测量ΔE之间的误差小于0.2的放行标准。
需要指出，根据实施的需要，可将本申请中描述的各个步骤/部件拆分为更多步骤/部件，也可将两个或多个步骤/部件或者步骤/部件的部分操作组合成新的步骤/部件，以实现本发明的目的。
本领域的技术人员容易理解，以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种在线色差检测***，其特征在于，包括：在线非接触式色差仪及支架；
    所述在线非接触式色差仪位于所述支架上，且所述在线非接触式色差仪发射出的光源指向被测样品，以对所述被测样品进行色差检测；
    其中，所述在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度之间的误差在正负1度以内。
  2. 根据权利要求1所述的***，其特征在于，调整所述在线非接触式色差仪的倾斜角度，以使所述在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度之间的误差在正负1度以内。
  3. 根据权利要求1或2所述的***，其特征在于，所述在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度一致。
  4. 根据权利要求3所述的***，其特征在于，所述***还包括：自动校验装置；
    所述自动校验装置与所述在线非接触式色差仪连接，用于按照第一预设周期控制所述在线非接触式色差仪移动至所述自动校验装置中的校正标样上方，以使所述在线非接触式色差仪通过测量的校正标样数据进行校正。
  5. 根据权利要求4所述的***，其特征在于，所述***还包括：自动标样装置；
    所述自动标样装置与所述在线非接触式色差仪连接，用于按照第二预设周期控制所述在线非接触式色差仪移动至所述自动标样装置中的校正标样上方，以使所述在线非接触式色差仪通过测量的校正标样数据更新标样 值。
  6. 根据权利要求2所述的***，其特征在于，所述在线非接触式色差仪在所述支架上横向移动，以对移动的所述被测样品进行多点连续扫描检测，并使用光源照射所述被测样品，转换成CIE LAB标准下使用L，a和b值作为测量值，并分别获取所述被测样品的L值与所述标样值L 0之间差值ΔL，所述被测样品的a值与所述标样值a 0之间差值Δa，所述被测样品的b值与所述标样值b 0之间差值Δb，并由ΔE＝(ΔL 2+Δa 2+Δb 2) 1/2得到平均色差ΔE，根据所述平均色差ΔE与预设阈值之间的关系判断所述被测样品是否合格。
  7. 根据权利要求6所述的***，其特征在于，所述在线非接触式色差仪，还用于在所述被测样品中任意一块区域的平均色差超过所述预设阈值时，发出警报信号，同时记录色差信息和该区域的横向和纵向坐标。
  8. 一种在线色差检测方法，其特征在于，包括：
    调整在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度，使得所述在线非接触式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度与离线台式色差仪的反射光测量器接收的反射光线与被测样品垂线的角度之间的误差在正负1度以内；
    所述在线非接触式色差仪发射出的光源指向被测样品，以对所述被测样品进行色差检测。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    通过自动校验装置按照第一预设周期控制所述在线非接触式色差仪移动至所述自动校验装置中的校正标样上方，以使所述在线非接触式色差仪通过测量的校正标样数据进行校正。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    通过自动标样装置按照第二预设周期控制所述在线非接触式色差仪移动至所述自动标样装置中的校正标样上方，以使所述在线非接触式色差仪 通过测量的校正标样数据更新标样值。
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