CN101620179A - Scanning type glass color difference measuring device and measuring method thereof - Google Patents

Abstract

The invention discloses a scanning type glass color difference measuring device and a measuring method thereof. A track (7) which is parallel to a driving roller (10) is arranged on the upper parts of brackets (11), a slide block (5) is arranged on the track (7), an optic probe (6) is arranged on the slide block (5), photoelectric switches (4) and (8) of a position sensor (12) are respectively arranged on the brackets (11), a light source beam of the optic probe (6) vertically irradiates the surface of a glass band (9), a receiving beam receives characteristic light reflected by the glass band (9), enters a color difference data collector (15) to realize data collection and pretreatment and enters an industrial personal computer (13) to realize data pretreatment, and a parameter relevant to color difference is calculated. Compared with the traditional fixed-point type measuring system, the scanning type glass color difference measuring device can completely reflect an integral color difference index of a glass plate, is more suitable for monitoring the glass color difference parameter on line and has quick and accurate measuring effect and stable measuring result; and the measuring method is simple and easy, low in cost and beneficial to increasing the enterprise production efficiency.

Description

Scanning type glass color difference measuring device and measuring method thereof

Technical field

The present invention relates to coated glass production, quality monitoring field, relate in particular to the coated glass optical parametric---the on-line monitoring method and the pick-up unit of aberration.

Background technology

Coated glass is in one or more layers metal of glass surface coating, metal oxide or other inorganic material, to change the optical property of glass, satisfies some particular requirement.Aberration is an important indicator of weighing the coated glass quality, and it has represented the consistance of coated glass surface color.Therefore detect the aberration of coated glass,, realize that the robotization control of coating performance and technological parameter interaction and performance optimization design all have important practical significance for detecting the coated glass quality, improve the plated film CONTROL PROCESS, improving coating performance.

At present, existing off-line measurement and online fixed-point type are measured two kinds of methods, and these two kinds of methods all have its limitation: off-line measurement, and production efficiency is low, the detection real-time is poor, in real time the CONTROL PROCESS link; Online fixed-point type is measured, and what time fixes sampling by several probes are set, and can not reflect the glass tape integral performance parameter comprehensively.Increase probe number gesture amount simply and certainly will cause cost to improve, also can bring inconvenience simultaneously to installation.And the consistance of each probe also be cannot say for sure to demonstrate,prove.

Summary of the invention

In order to solve the automatic problems of measurement of the glass tape aberration on coated glass in the prior art, the especially production line, the invention provides a kind of scanning type glass color difference measuring device and measuring method thereof.Labour intensity was big when this invention had solved and manually carried out chromatism measurement at the glass production line scene, efficient is low and online fixed-point type is measured problems such as measurement effect difference.

To achieve these goals, technical solution of the present invention is: a kind of scanning type glass color difference on-line measurement device is provided, and described device comprises the live-roller (10) of glass production line gearing and the glass tape (9) that live-roller (10) is carried.Wherein, the a pair of measurement bracket (11) that is positioned at glass production line live-roller (10) both sides is fixed on the base (1), the track (7) that is parallel to live-roller (10) is installed on the top of described measurement bracket (11), and track (7) is provided with slide block (5), and optic probe (6) is installed on it.Motor (3) and electric machine controller (2) are installed on a side of measurement bracket (11), and motor (3) drives slide block (5) by driving-belt and goes up slip at track (7), and described track (7) is vertical with the direction of motion of glass tape (9).Optic probe (6) lower end is L to the distance of glass tape (9), L=20mm～120mm.Optic probe (6) is a multiple beams of optical fiber, and described multiple beams of optical fiber comprises light source beam and receives restraints, and optic probe (6) is a reflection-type, and light source assembly and reception probe assembly are all in glass tape (9) the same side;

Two side stands (11) are gone up the optoelectronic switch (4 of installation site sensor (12) respectively, 8), the data line of position transducer (12) is connected to slave computer (14), and slave computer (14) connects electric machine controller (2), and the RS232 serial ports of slave computer (14) is connected to the RS232 serial ports of industrial computer (13); The data line of optic probe (6) is connected to chromatism data collector (15), and chromatism data collector (15) output line connects the USB interface of industrial computer (13);

The operating system of industrial computer (13) adopts Windows XP or above version; The measurement control software of industrial computer (13) is write with the BCB exploitation, and the function of measurement control software has: system reset and self check; Fixed point off-line measurement standard model and two kinds of mode of operations of scanning on-line measurement are arranged; Before measuring beginning, can carry out the setting of original reference data and correlation parameter, and have the parameters memorizing function;

Position by the optic probe (6) of slave computer (14) control effectively is consistent the measuring position realization measurement synchronization with industrial computer (13).

The data processing of industrial computer (13) and curve tracing display: data storage is gone into database, the inquiry of historical data, report output, is exceeded standard and report to the police and Long-distance Control.

The method that the present invention measures glass color difference is to use scanning type glass color difference measuring device.Optic probe (6) is a multiple beams of optical fiber, comprise light source beam and receive bundle, use scanning type glass color difference measuring device, the light source beam vertical irradiation receives bundle and receives from the characteristic light of sample reflected back to glass tape (9) surface, enters chromatism data collector (15) and realizes data acquisition and pre-service, then entering industrial computer (13) realization data handles again, analysis meter is calculated various parameters (spectral reflectance, tristimulus values, the L relevant with aberration ^*, a ^*, b ^*); Meanwhile, the location machinery that the directions X motor (3) of slave computer (14) control drives is realized synchronously the positional information feedback industrial computer (13) of optic probe (6).Industrial computer (13) is handled reflected spectrum data, obtains the parameter information of this measurement point, draws and goes out aberration, spectral reflectance, tristimulus values, L at industrial computer (13) screen display ^*, a ^*, b ^*Automatically evaluate the aberration quality grade of glass tape (9), data storage is gone into database, realizes exceeding standard works of treatment such as warning, classification mark.The good and bad real-time that directly influences measuring accuracy and measurement of the performance of chromatism data collector (15).Then sampled point is many soon for sampling processing speed, and measurement result representative good can reflect the aberration index of whole glass tape more comprehensively, really.

The invention has the beneficial effects as follows:

1. scan-type noncontact on-line measurement can be measured the aberration parameter of plurality of specifications product on the glass production line in real time;

2. more traditional off-line, fixed point On-line Measuring Method, representative error is little, and the precision height has reflected product integral color consistance more truly;

3. data management science, convenient inquiry;

4. measuring process full automation, measuring speed is fast, the efficient height;

Verified measuring accuracy, repeatability, stability and the reliability of system after tested, shown that apparatus of the present invention performance can satisfy the commercial Application demand.Adopt coated glass aberration pick-up unit of the present invention, by using exotic material preparing department sub-unit, can shift to an earlier date the installation site of (at annealing kiln) measurement mechanism, more timely, advantageously obtain measurement parameter information feedback technology controlling and process link, improve the production efficiency of enterprise, promote the practical value of measurement mechanism.The present invention can be applied to other fields of measurement that colour consistency is had requirement.

Description of drawings

Fig. 1 is the structural representation of scanning type glass color difference measuring device;

Fig. 2 is the measurement track synoptic diagram of scanning type glass color difference measuring device;

Fig. 3 is that the present invention detects the control system block diagram;

Fig. 4 is scanning type glass color difference measuring device on-line measurement L ^*, a ^*, b ^*Curve;

Fig. 5 is a scanning type glass color difference measuring device on-line measurement chromatic curve.

In above-mentioned accompanying drawing, 1. base, 2. electric machine controller, 3. motor, 4. optoelectronic switch, 5. slide block, 6. optic probe, 7. track, 8. optoelectronic switch, 9. glass tape, 10. live-roller, 11. support, 12. position transducers, 13. industrial computers, 14. slave computer, 15. chromatism data collectors, 16. measurement control softwares, 17. input-output device, 18. controlled topworkies

Fig. 1 is that the present invention is used for measuring glass sample and is used for the schematic diagram of on-line measurement glass tape aberration, Base 1 fixation measuring support 11, track 7 are positioned at directly over industry spot live-roller 10 and the glass tape 9, Motor 3 and electric machine controller 2 are installed on support 11 1 sides, by belt driving band movable slider 5 and On optic probe 6 slide at track 7, optoelectronic switch 4,8 lays respectively at support 11 both sides and uses Position with monitoring slide block 5.

Fig. 2 is optic probe 6 and slide block 5 edges and glass tape 9 directions of motion, and namely Y-direction is vertical Directions X track 7 slides, and forming the scanning survey track is m.

Fig. 3 detects control system to consist of and relation. Industrial computer 13 is directly controlled the chromatism data collector 15 and carry out duplex communication with slave computer 14. Optic probe 6 and slide block 5 are by being subjected to slave computer 14 controls Motor 3 transmissions realize scanning survey. 17 is input-output equipment: key-press input and demonstration output. Controlled executing agency 18 can be mark output or classification stepping subsystem etc.

Embodiment

Embodiment

The present invention is further illustrated below in conjunction with embodiment, is intended to help the reader to understand essence of the present invention better, but enforcement of the present invention and protection domain are not constituted any restriction.

Use scanning type glass color difference measuring device on-line measurement production line glass color difference parameter.Chromatism data collector 15 adopts a fiber spectrometer with USB2.0 interface, and this spectrometer adopts ILX554 type 2048 pixel line array CCD detectors, and focal length 75mm, measurement wavelength coverage are that 200～1100nm, highest resolution are 0.04nm; It is the low-voltage halogen tungsten of 360nm～2000nm that light source adopts wavelength coverage, and its stability is less than 2%.

Optic probe 6 is a multi-core fiber, comprises light source beam and receive surveying bundle.The optical axis that sends light from light source beam is perpendicular to glass tape 9 surfaces, and its launch spot is the about 10mm of diameter on glass tape 9 surfaces at 60mm place at L.The reflected light on coated glass surface enters to receive surveys bundle optical fiber, thereafter send into spectrometer, spectrometer is constantly gathered spectral information, and pass in the industrial computer 13 by USB interface, industrial computer 13 is finished these spectroscopic datas and is calculated and handle, and demonstrate glass color difference, spectral reflectance, tristimulus values, L in real time ^*, a ^*, b ^*

Slave computer 14 control motor 3 and motor drivers 2 drive slide block 5 and optic probe 6 by belt, and it is slided along directions X track 7.And the U type optoelectronic switch by being installed on support 11 both sides 4,8 is realized the position limitation protection control of motors.Meanwhile slave computer 14 also carries out real-time Communication for Power with industrial computer 13: slave computer 14 is in real time with the positional information feedback industrial computers 13 of optic probe 6, and monitors the control command from industrial computer 13, operation such as realize start and stop, commutation, the speed change of motor and reset.

Optoelectronic switch 4,8 its models are PM-T44P;

Motor 3 is selected 56BYG type two-phase hybrid stepping motor for use, and controller 2 models are SH-20403;

Slave computer 14 adopts AT89S52 type single-chip microcomputer.

The debugging of system for convenience, the stepper motor driver that has adopted general single chip to control.With several reset key control step motors 3 reset, speed, direction etc.Being furnished with LCD and status indicator lamp simultaneously shows.

Electric power system: each parts of system all have the civil power of 220V@50Hz by individual event 1KVA AC voltage regulator, transformer step-down in machine, rectification and voltage stabilizing power supply.Wind-cooling heat dissipating.

The inner connection: a cable is connected to the RS232 serial ports of industrial computer 13 from the RS232 serial ports of slave computer 14; Article one, the chromatism data collector 15 of cable from reflection type optical sensor 19 exports the USB interface of industrial computer 13 to.

Calibration: be placed on several standard models of examining and determine through metering section on the measurement zone, the measured value that can calibrate aberration by measurement.

Automatically calculate modified value and measurement result is revised by industrial computer.

This device track 7 long 2500mm are installed between Coated Glass Line annealed zone and the branch section, and the scope of glass tape 9 pull speed Vy is 250～500 meters/hour; Set the speed Vy=60mm/s of glass tape 9, slide block 5 travelling speed Vx=120mm/s measure track m and the horizontal angle of glass tape this moment

τ=83ms integral time that the initialization system aberration is gathered, then 1/ τ=12 points/s;

$V_m=\sqrt{V_x^2+{\mathrm{<figure-callout\; id="2"\; label="V\; y"\; filenames="A2009100751000015H3.png"\; state="\{\{state\}\}">V</figure-callout>}}_y^{}}=134\mathrm{mm}/s$

When system scan moved, every approximately 11mm was with regard to some values of chromatism of energy measurement on glass tape like this;

As the glass tape lateral length is 2000mm, then delegation's track while scan length m

$m=\frac{1}{\cos \mathrm{\&alpha;}}=2000/0.894=2236\mathrm{mm}$

But scanning delegation measuring point is counted n

n＝2236/11＝203

Every about 10mm of spot diameter can truly reflect laterally consistency of colour of glass tape surface substantially.The color difference typical value of system scan delegation is 1.77NBS as calculated, less than the 3NBS of GB requirement.

The embodiment of the invention adopts the one way scanning survey, and the backhaul of promptly popping one's head in is not measured; Can realize the round trip scanning survey to the system software correct, the backhaul of promptly popping one's head in is also measured.

The chromatism measurement method

Observation condition: CIE196410 ° of visual field X ₁₀Y ₁₀Z ₁₀Colorimeter system;

Standard illuminants: D ₆₅

The color space: CIE1976L ^*a ^*b ^*The color space;

Measuring method: spectrophotometric colorimetry;

Sample: Qinhuangdao glass factory provides the coated glass sample that detects through national glass quality inspection center, and its color parameter is L ^*=43; a ^*=7.5; b ^*=-35;

Measure and calculation procedure:

One, the measurement of spectral reflectance

The measuring method of spectral reflectance has three kinds of the direct method of measurement, the substitution method of measurement and monochromatic light road mensurations, and wherein the step of the substitution method of measurement is:

(1) adopts the double light path spectrophotometer; (2) the reference beam window is placed the reference blank; (3) the working stamndard blank is contained in the measuring beam window, measures its spectral response reading; (3) replace the working stamndard blank by sample, directly measure the spectral response reading of sample; (4) calculate the spectral reflectance of sample by formula (1).

$\mathrm{\&rho;}\left(\mathrm{\&lambda;}\right)=\frac{r\left(\mathrm{\&lambda;}\right)}{r_0\left(\mathrm{\&lambda;}\right)}\&CenterDot;{\mathrm{\&rho;}}_0\left(\mathrm{\&lambda;}\right)---\left(1\right)$

In order to weaken the influence to measuring of instrument internal noise and environment temperature, we adopt the improved substitution method of measurement, and the unglazed spectroscopic data that enters need be measured or load to this method---half-light spectrum number of responses;

1. the response of half-light spectrum is measured

Since gather the used spectrometer of spectrum to responsive to temperature, under normal operation, the charge carrier that produces by thermal excitation, making is not having can there be undesirable dark current under the situation of illumination yet, so this part signal need be removed.In view of the above formula (1) is improved to:

$\mathrm{\&rho;}\left(\mathrm{\&lambda;}\right)=\frac{r\left(\mathrm{\&lambda;}\right)-d\left(\mathrm{\&lambda;}\right)}{r_0\left(\mathrm{\&lambda;}\right)-d\left(\mathrm{\&lambda;}\right)}\&CenterDot;{\mathrm{\&rho;}}_0\left(\mathrm{\&lambda;}\right)---\left(2\right)$

In the formula, ρ (λ) is the spectral reflectance of sample, ρ ₀(λ) be the spectral reflectance of working stamndard blank, r (λ) is the spectral response reading of sample, r ₀(λ) be the spectral response reading of working stamndard blank, d (λ) is the unglazed spectroscopic data that enters, and data see Table 1.

2. working stamndard blank spectral response number and spectral reflectance thereof are measured

The selection of standard white plate: standard white plate can be divided into transmission standard white plate, working stamndard blank and reference blank.We select the reference blank for use, and it is that device is at the reference beam window, as calibration or the reference standard when measuring.Have sufficient diffusing characteristic diffuser, spectral reflectance height, spectral selectivity are little in 380～780nm wavelength coverage, and certain mechanical strength and optical stability are arranged.

Table 1

3. setting integral time is 100ms, and the spectral response of measuring samples is counted r (λ);

4. will record data substitution formula (2) and calculate sample spectra reflectance;

5. color parameter is set relatively;

Aberration is meant that the reflection colour of coated glass compares the difference degree aspect color or brightness with standard sample of photo.So before the measurement glass color difference, need to measure or load earlier the color of standard sample of photo, promptly relative color parameter.The reference parameter that present embodiment adopts is: L ^*=43; a ^*=7.5; b ^*=-35.

Two, the computing method of tristimulus values

Object color is divided into reverberation body colour and transparent objects look, and what coated glass aberration on-line detecting system was measured is the reflection colour on coated glass surface.The tristimulus values X of reflection colour, Y, Z computing formula are:

$X=K\underset{\mathrm{\&lambda;}}{\mathrm{\&Sigma;}}S\left(\mathrm{\&lambda;}\right)\stackrel{\&OverBar;}{x}\left(\mathrm{\&lambda;}\right)\mathrm{\&rho;}\left(\mathrm{\&lambda;}\right)\mathrm{\&Delta;\&lambda;}$

$Y=K\underset{\mathrm{\&lambda;}}{\mathrm{\&Sigma;}}S\left(\mathrm{\&lambda;}\right)\stackrel{\&OverBar;}{y}\left(\mathrm{\&lambda;}\right)\mathrm{\&rho;}\left(\mathrm{\&lambda;}\right)\mathrm{\&Delta;\&lambda;}---\left(3\right)$

$Z=K\underset{\mathrm{\&lambda;}}{\mathrm{\&Sigma;}}S\left(\mathrm{\&lambda;}\right)\stackrel{\&OverBar;}{z}\left(\mathrm{\&lambda;}\right)\mathrm{\&rho;}\left(\mathrm{\&lambda;}\right)\mathrm{\&Delta;\&lambda;}$

In the formula, S (λ) is that the relative spectral power of standard sources distributes, ρ (λ) is the spectral reflectance of sample, Δ λ is the wavelength interval, x (λ), y (λ), z (λ) are the color matching function in the CIE1931 standard colorimetric system, if replenish standard colorimetric system with CIE1964, then use color matching function x ₁₀(λ), y ₁₀(λ), z ₁₀(λ), K is a transformation coefficient, and its value is $K=\frac{100}{\underset{\mathrm{\&lambda;}}{\mathrm{\&Sigma;}}S\left(\mathrm{\&lambda;}\right)\stackrel{\&OverBar;}{y}\left(\mathrm{\&lambda;}\right)\mathrm{\&Delta;\&lambda;}}.$

The numerical value of weighting coefficient S (λ) x (λ), S (λ) y (λ), S (λ) z (λ) is by the regulation in State Standard of the People's Republic of China GB3979-83 table 1 " weighting coefficient of CIE standard illuminants and CIE1931 standard colorimetric observer color matching function " and the table 2 " weighting coefficient of CIE standard illuminants and CIE1964 standard colorimetric observer color matching function ".

Obtain tristimulus values XYZ, according to CIE1976L ^*a ^*b ^*Color space formula (4-1,4-2,4-3) and colour difference formula (5) can calculate the sample aberration.

CIE1976L ^*a ^*b ^*The color space is called for short the CIELAB color space, by rectangular coordinate L ^*, a ^*, b ^*Constitute.Wherein, lightness index L ^*By formula (4-1) calculates.

L ^*＝116(Y/Y _n) ^1/3-16，Y/Y _n＞0.008856 (4-1)

L ^*＝903.3(Y/Y _n)，Y/Y _n≤0.008856

If X/X _n, Y/Y _n, Z/Z _nValue all greater than 0.008856 o'clock, chromaticity index a ^*And b ^*By formula (4-2) calculates; Work as X/X _n, Y/Y _n, Z/Z _nValue was less than 0.008856 o'clock, and chromaticity index by formula (4-3) calculates.

a ^*＝500[(X/X _n) ^1/3-(Y/Y _n) ^1/3] (4-2)

b ^*＝200[(Y/Y _n) ^1/3-(Z/Z _n) ^1/3]

a ^*＝500[f(X/X _n)-f(Y/Y _n)] (4-3)

b ^*＝200[f(Y/Y _n)-f(Z/Z _n)]

In the formula, f (q)=7.787 (q)+16/116, q represents X/X _n, Y/Y _nOr Z/Z _n

ΔE ^* _ab＝[(ΔL ^*) ²+(Δa ^*) ²+(Δb ^*) ²] ^1/2 (5)

In the formula, Δ E ^* _AbBe L ^*a ^*b ^*The aberration of two testees in the colour system, Δ L ^*Be L ^*a ^*b ^*The lightness index L of two testees in the colour system ^* ₁And L ^* ₂Poor, Δ a ^*, Δ b ^*Be L ^*a ^*b ^*The chromaticity index of two testees is poor in the colour system.

System's transversal scanning records the L of each point ^*, a ^*, b ^*The curve of parameter as shown in Figure 4, record a little color data and the chromatic curve between the Standard Colors parameter as shown in Figure 5, whole points of system scan delegation gained and the aberration mean value between the Standard Colors parameter are 1.77NBS as calculated, less than 3NBS, meet State Standard of the People's Republic of China's regulation.

Claims (7)

1. scanning type glass color difference measuring device, described device comprise the live-roller (10) of glass production line gearing and the glass tape (9) that live-roller (10) is carried, and it is characterized in that:

The a pair of measurement bracket (11) that is positioned at glass production line live-roller (10) both sides is fixed on the base (1), the track (7) that is parallel to live-roller (10) is installed on the top of described measurement bracket (11), track (7) is provided with slide block (5), described slide block (5) is gone up optic probe (6) is installed, motor (3) drives slide block (5) by driving-belt and goes up slip at track (7), and described track (7) is vertical with the direction of motion of glass tape (9);

Two side stands (11) are gone up the optoelectronic switch (4 of installation site sensor (12) respectively, 8), the data line of position transducer (12) is connected to slave computer (14), slave computer (14) connects electric machine controller (2), electric machine controller (2) connects motor (3), and the RS232 serial ports of slave computer (14) is connected to the RS232 serial ports of industrial computer (13); The data line of optic probe (6) is connected to chromatism data collector (15), and chromatism data collector (15) output line connects the USB interface of industrial computer (13);

The operating system of industrial computer (13) adopts Windows XP or above version; The measurement control software (16) of industrial computer (13) is write with BCB, and the function of measurement control software (16) has: system reset and self check; Fixed point off-line measurement standard model and two kinds of mode of operations of scanning on-line measurement are arranged; Before measuring beginning, can carry out the setting of original reference data and correlation parameter, and have the parameters memorizing function;

Position by the optic probe (6) of slave computer (14) control effectively is consistent the measuring position realization measurement synchronization with industrial computer (13).

The data processing of industrial computer (13) and curve tracing display: data storage is gone into database, the inquiry of historical data, report output, is exceeded standard and report to the police and Long-distance Control.

2. scanning type glass color difference measuring device according to claim 1 is characterized in that: optic probe (6) lower end is L to the distance of glass tape (9), L=20mm～120mm.

3. scanning type glass color difference measuring device according to claim 1 and 2 is characterized in that: optic probe (6) is a multiple beams of optical fiber, and described multiple beams of optical fiber comprises light source beam and receives bundle.

4. scanning type glass color difference measuring device according to claim 1 is characterized in that: optic probe (6) is a reflection-type, and light source assembly and reception probe assembly are all in glass tape (9) the same side.

5. the measuring method of a scanning type glass color difference measuring device according to claim 1 is characterized in that: said method comprising the steps of:

(5.1) the light source beam vertical irradiation of optic probe (6) receives bundle and receives from the characteristic light of glass tape (9) reflected back to the surface of glass tape (9), enters chromatism data collector (15) and realizes data acquisition and pre-service;

(5.2) above-mentioned collection and preprocessed data enter industrial computer (13) and realize that data handle again, and analysis meter is calculated the parameter relevant with aberration, as spectral reflectance, tristimulus values, L ^*, a ^*, b ^*

(5.3) meanwhile, electric machine controller (2) the control motor (3) of slave computer (14) control drives slide block (5) and optic probe (6), and the positional information feedback industrial computer (13) of optic probe (6) is realized synchronously;

(5.4) industrial computer (13) is handled reflected spectrum data, obtains the parameter information of this measurement point, draws and goes out glass color difference, spectral reflectance, tristimulus values, L at industrial computer (13) screen display ^*, a ^*, b ^*Automatically evaluate the aberration quality grade of glass tape (9), data storage is gone into database, realizes exceeding standard warning, classification mark work of treatment.

6. according to the measuring method of the described scanning type glass color difference measuring device of claim 5, it is characterized in that: the measuring process of spectral reflectance is as follows in the step (5.2):

(6.1) the unglazed spectroscopic data d (λ) that enters---the response of half-light spectrum is measured;

(6.2) working stamndard blank spectral response is counted r ₀(λ);

(6.3) the spectral reflectance ρ of working stamndard blank ₀(λ);

(6.4) the spectral response reading r (λ) of sample measures;

(6.5) substitution formula (2) obtains sample spectra reflectance;

$\mathrm{\&rho;}\left(\mathrm{\&lambda;}\right)=\frac{r\left(\mathrm{\&lambda;}\right)-d\left(\mathrm{\&lambda;}\right)}{r_0\left(\mathrm{\&lambda;}\right)-d\left(\mathrm{\&lambda;}\right)}\&CenterDot;{\mathrm{\&rho;}}_0\left(\mathrm{\&lambda;}\right)---\left(2\right)$

In the formula:

The spectral reflectance of ρ (λ)-sample;

ρ ₀(λ)-spectral reflectance of working stamndard blank;

The spectral response reading of r (λ)-sample;

r ₀(λ)-the spectral response reading of working stamndard blank;

D (the λ)-unglazed spectroscopic data that enters.

7. according to the measuring method of the described scanning type glass color difference measuring device of claim 5, it is characterized in that: the calculation procedure of tristimulus values is as follows in the step (5.2):

The tristimulus values X of reflection colour, Y, Z computing formula are:

$X=K\underset{\mathrm{\&lambda;}}{\mathrm{\&Sigma;}}S\left(\mathrm{\&lambda;}\right)\stackrel{\&OverBar;}{x}\left(\mathrm{\&lambda;}\right)\mathrm{\&rho;}\left(\mathrm{\&lambda;}\right)\mathrm{\&Delta;\&lambda;}$

$Y=K\underset{\mathrm{\&lambda;}}{\mathrm{\&Sigma;}}S\left(\mathrm{\&lambda;}\right)\stackrel{\&OverBar;}{y}\left(\mathrm{\&lambda;}\right)\mathrm{\&rho;}\left(\mathrm{\&lambda;}\right)\mathrm{\&Delta;\&lambda;}---\left(3\right)$

$Z=K\underset{\mathrm{\&lambda;}}{\mathrm{\&Sigma;}}S\left(\mathrm{\&lambda;}\right)\stackrel{\&OverBar;}{z}\left(\mathrm{\&lambda;}\right)\mathrm{\&rho;}\left(\mathrm{\&lambda;}\right)\mathrm{\&Delta;\&lambda;}$

In the formula:

The relative spectral power of S (λ)-standard sources distributes;

The spectral reflectance of ρ (λ)-sample;

Δ λ-wavelength interval;

Color matching function in x (λ), y (λ), z (the λ)-CIE1931 standard colorimetric system if replenish standard colorimetric system with CIE1964, is then used color matching function x ₁₀(λ), y ₁₀(λ), z ₁₀(λ);

The K-transformation coefficient, its value is $K=\frac{100}{\underset{\mathrm{\&lambda;}}{\mathrm{\&Sigma;}}S\left(\mathrm{\&lambda;}\right)\stackrel{\&OverBar;}{y}\left(\mathrm{\&lambda;}\right)\mathrm{\&Delta;\&lambda;}};$

The numerical value of weighting coefficient S (λ) x (λ), S (λ) y (λ), S (λ) z (λ) is by the regulation in State Standard of the People's Republic of China GB3979-83 table 1 " weighting coefficient of CIE standard illuminants and CIE1931 standard colorimetric observer color matching function " and the table 2 " weighting coefficient of CIE standard illuminants and CIE1964 standard colorimetric observer color matching function ";

Obtain tristimulus values XYZ, according to CIE1976 L ^*a ^*b ^*Color space formula (4-1,4-2,4-3) and colour difference formula (5) can calculate the sample aberration;

CIE1976 L ^*a ^*b ^*The color space is called for short the CIELAB color space, by rectangular coordinate L ^*, a ^*, b ^*Constitute; Wherein, lightness index L ^*By formula (4-1) calculates:

L ^*＝116(Y/Y _n) ^1/3-16，Y/Y _n＞0.008856

(4-1)

L ^*＝903.3(Y/Y _n)，Y/Y _n≤0.008856

If X/X _n, Y/Y _n, Z/Z _nValue all greater than 0.008856 o'clock, chromaticity index a ^*And b ^*By formula (4-2) calculates; Work as X/X _n, Y/Y _n, Z/Z _nValue was less than 0.008856 o'clock, and chromaticity index by formula (4-3) calculates:

a ^*＝500[(X/X _n) ^1/3-(Y/Y _n) ^1/3] (4-2)

b ^*＝200[(Y/Y _n) ^1/3-(Z/Z _n) ^1/3]

a＝500[f(X/X _n)-f(Y/Y _n)] (4-3)

b ^*＝200[f(Y/Y _n)-f(Z/Z _n)]

In the formula:

f(q)＝7.787(q)+16/116；

Q represents X/X _n, Y/Y _nOr Z/Z _n

ΔE ^* _ab＝[(ΔL ^*) ²+(Δa ^*) ²+(Δb ^*) ²] ^1/2 (5)

In the formula:

Δ E ^* _Ab-L ^*a ^*b ^*The aberration of two testees in the colour system;

Δ L ^*-L ^*a ^*b ^*The lightness index L of two testees in the colour system ^* ₁And L ^* ₂Poor;

Δ a ^*, Δ b ^*-L ^*a ^*b ^*The chromaticity index of two testees is poor in the colour system.

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