CN108195469A - A kind of portable color measurement instrument - Google Patents
A kind of portable color measurement instrument Download PDFInfo
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- CN108195469A CN108195469A CN201810116882.6A CN201810116882A CN108195469A CN 108195469 A CN108195469 A CN 108195469A CN 201810116882 A CN201810116882 A CN 201810116882A CN 108195469 A CN108195469 A CN 108195469A
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- 238000005259 measurement Methods 0.000 title claims abstract description 242
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- 239000004033 plastic Substances 0.000 claims abstract description 5
- 229920003023 plastic Polymers 0.000 claims abstract description 5
- 239000000523 sample Substances 0.000 claims description 98
- 238000012937 correction Methods 0.000 claims description 19
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- 238000000151 deposition Methods 0.000 claims 1
- 238000010422 painting Methods 0.000 claims 1
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- 230000002349 favourable effect Effects 0.000 abstract description 3
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- 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
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- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
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Abstract
A kind of portable color measurement instrument of the present invention belongs to the color measuring apparatus of field of optical measurements.The appearance of the portable color measurement instrument of the present invention is cuboid, and top design has handle, measures button and touch screen displays, and bottom is designed with measurement window and equipped with measurement bottom cover.Portable color measurement instrument is made of components such as light source, integrating sphere, condenser, monochromator, array CCD sensor, analog-digital converter, microprocessor, memory, power supplys.Light is measured after integrating sphere collection homogenizes, after being divided and measured by high-resolution monochromator and array CCD sensor, color parameter is calculated by microprocessor with reference to standards such as ISO.Excellent design ensures that portable color measurement instrument has high certainty of measurement, favorable repeatability, measurement efficiency is high, easy to carry, the advantages of easy to operate, can be widely applied to the raw material at the fields such as cloth, paper, dyestuff, coating, beverage, plastics production line scene and the color measuring of product.
Description
Technical field
The invention belongs to the color measuring apparatus in optical gauge field, and in particular to a kind of portable color measuring
Instrument.
Background technology
The article that people can see all has certain color, therefore color is a kind of important sense organ body of the mankind
It tests.In daily life, people can be by simple red, orange, yellow, green, blue, indigo, purple come to the article observed by it
Color carries out qualitative description.But in some specific production fields, then need by specific parameter come to measured material
Color be quantitatively described.
Function of the common spectrophotometer in terms of optical measurement is very powerful, can measure the transmissivity of material, reflection
The parameters such as rate, absorptivity, solution concentration.The color of different materials can certainly accurately be measured, and can be specific
The colour space in be quantitatively described by specific parameter come the color to measured material.But common spectrophotometer
It is cumbersome in the onsite application of production line, it is mainly manifested in：First, the volume of common spectrophotometer is all huger, no
It is easy to carry, and the requirement to use environment is very high, needs to cook up special space to put and operate；Second is that common point
The photometric operating method of light is more complicated, needs the personnel by professional training that can just operate the computer；Third, common light splitting
Photometer generally all uses the measurement method of length scanning, and the time of measuring of single sample is longer, and measurement efficiency is relatively low.
For some specific production fields, such as the production fields such as cloth, paper, dyestuff, coating, beverage, plastics, often
It often needs to carry out timely, quick measurement and record to the raw material of production line different location and the color scene of product, this will
Color measurement instrument used in asking has measurement efficiency height, easy to carry, simple operation and other advantages.
Invention content
The color of raw material and product for the fields such as cloth, paper, dyestuff, coating, beverage, plastics production line scene
In time, quick measurement demand, the present invention provides a kind of portable color measurement instruments, have high certainty of measurement, repeatability
Good, measurement efficiency is high, and small volume and less weight is easy to carry, it is easy to operate the advantages of.
A kind of appearance of portable color measurement instrument of the present invention is rectangular shape, and a length of 18 ~ 25cm of cuboid is long
Cube it is wide it is consistent with high size be 8 ~ 12cm.There is handle easy to carry at the top of the portable color measurement instrument and operate,
In one end of handle, there are one measure button to control the measurement of portable color measurement instrument.The portable color measurement instrument
Top is there are one touch screen displays, for selecting and showing measurement data.There are one the bottoms of the portable color measurement instrument
Circular measurement window, aperture are 0.5 ~ 1.0cm, and when measuring, ligh trap or standard white plate or sample are just placed in measurement window
At mouthful and next to measurement window.The side of the portable color measurement instrument is used to charge to instrument power source equipped with USB interface
And data transmission, and be used to start or close instrument equipped with power switch.The portable color measurement instrument bottom surface surrounding design
There is small dent.
The portable color measurement instrument is equipped with measurement bottom cover, and the measurement bottom cover is cuboid trough-like shapes, whole
The length of body and wide size are consistent with the length of portable color measurement instrument and wide size, a height of 1 ~ 2cm.The measurement bottom cover
Sidewall thickness is 0.1 ~ 0.2cm, is matched with the small dent of portable color measurement instrument bottom surface surrounding, and when measurement just covers portable
The bottom of formula color measurement instrument, so as to eliminate influence of the surrounding environment light to measurement result.In the measurement bottom cover with it is portable
The matched position of measurement window of formula color measurement instrument there are one circular setting-out groove, for place ligh trap or standard white plate or
Sample.For the portable color measurement instrument equipped with planchet, the size of the planchet and setting-out in measurement bottom cover are recessed
The size matching of slot.The planchet can place solid sample, liquid sample, powder sample, particulate samples, and using integration
Ball collects the reflected light of sample（The reflected light of all directions including sample reflection）, thus portable color measurement instrument can be right
The material sample of the variforms such as solid-state, liquid, powder, particle carries out color measuring, has very extensive application field.
The portable color measurement instrument is connect by optical measurement unit, microprocessor, memory, touch screen displays, USB
The components such as mouth, power supply, cable, shell form.
The optical measurement unit is by light source, integrating sphere, condenser, monochromator, array CCD sensor, analog-digital converter
Composition.The light source is stroboscopic light sources, and the effective wavelength range of spectrum is 360 ~ 800nm, when the flash intensity of light source and flash of light
Between by chip controls so that the luminous flux to glisten every time is very high, and ensures that the luminous flux that glistens every time is consistent, can be effective
Improve the signal-to-noise ratio of instrument.The radius size of the integrating sphere is 2.5 ~ 5cm, and the white diffusing reflection that inside is coated with high reflectance applies
Layer can play good homogenization, and collect all reflected lights reflected through sample to measuring light（No matter sample is minute surface
Reflection or diffusing reflection）.The condenser mainly carries out convergence effect to measuring light, preferably to enter monochromator.It is described
Monochromator uses fixed wave length structure, and function is acted on for light splitting, i.e., is monochromatic light by the measurement photodegradation that entrance slit enters,
And it is projected by corresponding exit slit.The array CCD sensor is close to monochromator exit slit, for measuring each exit slit
The light intensity of corresponding wavelength.The effect of the analog-digital converter is to be converted into the analog signal that array CCD sensor measurement obtains
Microprocessor is transmitted further to after digital signal and carries out data processing.
Initial data of the microprocessor acquired in for processing and calculating optical measuring unit, calculates sample
Color parameter, and communicate with components such as memory, touch screen displays, USB interfaces.
The touch screen displays are used to show current measurement data, and can select to check historical measurement data.
The memory is used to store measurement data and internal algorithm.
The power supply is chargeable lithium ion battery, for powering to components such as optical measurement unit, microprocessors.
The operation principle of the portable color measurement instrument is：During measurement, touch and measure button, existed by the light that light source is sent out
It is homogenized inside integrating sphere by multiple diffusing reflection, while the reflected light of sample is homogenized by integrating sphere collection, measures light by accumulating
The thang-kng window of bulb separation side, which projects, reaches condenser, enters monochromator by entrance slit after condenser convergence, inside monochromator
The optical elements such as grating will to measure photodegradation be monochromatic light, and projected by corresponding exit slit；Again by array CCD sensor
The light intensity for obtaining corresponding wavelength is measured, and is converted to the analog signal that array CCD sensor measurement obtains by analog-digital converter
Digital signal, and be transferred to microprocessor and carry out data processing.Microprocessor combination zero point correction and the number of standard white plate calibration
According to calculating the reflectance spectrum of sample.Sample is further calculated according to the reflectance spectrum of sample to exist
Color parameter in the different colour spaces.The color parameter obtained is measured to be shown by touch screen displays, while deposited by memory
Storage is called for the later stage.The internal algorithm of the portable color measurement instrument refers to the computational methods of the standards such as ISO, ASTM, GB/T,
Ensure from raw measurement data to color parameter conversion method accurately and reliably.
The measurement procedure of the portable color measurement instrument is as described below.
（1）Carry out zero point correction.
Ligh trap is placed in the setting-out groove for measuring bottom cover, portable color measurement instrument, which is placed on, to be measured on bottom cover, is measured
The side wall of bottom cover is matched with the small dent of portable color measurement instrument bottom surrounding, just covers the bottom of portable color measurement instrument
Portion, then ligh trap face and the closely measurement window of portable color measurement instrument.It touches and measures button, the light beam that light source generates enters
Integrating sphere by repeatedly diffusing reflection homogenizes, while be irradiated to the light on ligh trap and absorbed by ligh trap inside integrating sphere, measures light by accumulating
The thang-kng window directive condenser of bulb separation side, monochromator entrance slit is converged to, and will measure light by monochromator by condenser
The monochromatic light of different wave length is resolved into, is projected by corresponding exit slit, then corresponding wavelength is gone out by array CCD sensor measurement
Light intensity.Through analog-digital converter by array CCD sensor measurement to analog signal be converted to digital data transmission to microprocessor,
It is stored in memory for use by the calibration data as zero after microprocessor calculation processing.
（2）Carry out the calibration of standard white plate.
Standard white plate is placed in the setting-out groove for measuring bottom cover, portable color measurement instrument, which is placed on, to be measured on bottom cover,
The side wall for measuring bottom cover is matched with the small dent of portable color measurement instrument bottom surrounding, just covers portable color measurement instrument
Bottom, then standard white plate face and the closely measurement window of portable color measurement instrument.It touches and measures button, what light source generated
Light beam enters integrating sphere, by repeatedly diffusing reflection homogenizes, while the reflected light of standard white plate is collected by integrating sphere inside integrating sphere
It homogenizes, measures thang-kng window directive condenser of the light by integrating sphere side, monochromator entrance slit is converged to by condenser, and by
Monochromator will measure photodegradation into the monochromatic light of different wave length, be projected by corresponding exit slit, then surveyed by array CCD sensor
Measure the light intensity of corresponding wavelength.Through analog-digital converter by array CCD sensor measurement to analog signal be converted to digital signal
Microprocessor is transferred to, is stored in memory for use by the calibration data as standard white plate after microprocessor calculation processing.
（3）It carries out sample measurement and obtains color parameter.
Sample is positioned in planchet, and the planchet for installing sample is placed in the setting-out groove for measuring bottom cover
Interior, portable color measurement instrument, which is placed on, to be measured on bottom cover, measures the side wall of bottom cover and portable color measurement instrument bottom surrounding
The matching of small dent, just cover the bottom of portable color measurement instrument, then sample face and closely portable color survey
Measure the measurement window of instrument.It touches and measures button, the light beam that light source generates enters integrating sphere, by diffusing reflection multiple inside integrating sphere
It homogenizes, while the reflected light of sample is homogenized by integrating sphere collection, measures light and gathered by the thang-kng window directive of integrating sphere side
Light microscopic converges to monochromator entrance slit, and will measure monochromatic light of the photodegradation into different wave length by monochromator by condenser, by
Corresponding exit slit projects, then goes out the light intensity of corresponding wavelength by array CCD sensor measurement.Through analog-digital converter by array
The analog signal that ccd sensor measures is converted to digital data transmission to microprocessor, microprocessor combination zero point correction and
The data of standard white plate calibration calculate the reflectance spectrum of sample.It is further according to the reflectance spectrum of sample
Calculate color parameter of the sample in the different colour spaces.It measures the color parameter obtained to be shown by touch screen displays, together
When by memory carry out storage for the later stage call.
The different colour spaces may be used to represent the color parameter of sample, and can in the portable color measurement instrument
To select switching between these different colour spaces, the used colour space includes the CIE1931 XYZ colour spaces, CIELAB colors
Space, the CIELUV colour spaces.
The portable color measurement instrument can select one to measure sample as reference in sample measurement is carried out
Sample, in the measurement for carrying out other samples, portable color measurement instrument can measure and calculate sample and reference sample
Colour difference.
The portable color measurement instrument is required for carrying out zero point correction and standard before each unlatching carries out sample measurement
The calibration of blank.After having carried out zero point correction and standard white plate calibration every time, after the sample for carrying out certain number measures, it is necessary to
Zero point correction is re-started to calibrate with standard white plate.The precision measured to ensure sample, in zero point correction twice and standard white plate
The number of sample measurement can be carried out between calibration no more than 100 times.
Compared with prior art, a kind of portable color measurement instrument of the invention mainly has the advantage that and gain effect.
（1）Light source used is stroboscopic light sources in the optical measurement unit of the portable color measurement instrument of the present invention, and light source
Flash intensity and flash time by chip controls, it is ensured that the luminous flux to glisten every time is very high, and ensures that the light that glistens every time leads to
It is good to measure consistency, effectively raises the signal-to-noise ratio of instrument；Integrating sphere used, which can be good at collecting, homogenizes measuring beam, high
The monochromator and array CCD sensor of resolution ratio have high measurement accuracy；Excellent design is with being equipped with so that portable face
Color measuring instrument has the advantages of high certainty of measurement, favorable repeatability, stability is good.
（2）The portable color measurement instrument of the present invention is real using the monochromator of fixed wave length structure and array CCD sensor
Existing multi-wavelength measures simultaneously, and the time of measuring of single sample is short, and measurement efficiency is high, is well suited for the on-the-spot test work of production line.
（3）The internal algorithm of the portable color measurement instrument of the present invention is with reference to the calculating side of the standards such as ISO, ASTM, GB/T
Method, it is ensured that from raw measurement data to color parameter conversion method accurately and reliably.
（4）The perfect in shape and function of the portable color measurement instrument of the present invention, can measure and calculate sample in not homochromy sky
Between color parameter, measurement data is stored automatically；And reference sample can be set, instrument can calculate automatically during measurement
Colour difference between sample and reference sample；Operation interface is friendly, can be selected by touch screen displays in not homochromy sky
Between middle display sample measurement parameter, and can call and check historical measurement data；It is equipped with USB interface, Neng Goushi
Now with extraneous accessible communication.
（5）The portable color measurement instrument of the present invention have the advantages that it is small, light-weight, easy to carry, it is very applicable
It measures and records in the quick of color parameter of the raw material and product at production line scene.
（6）The portable color measurement instrument of the present invention it is easy to operate, it is convenient to measure, and only operating personnel need to be carried out simple
Training explanation can carry out production line sample color measuring work.
（7）The portable color measurement instrument of the present invention can measure the material sample of variform, including solid sample, liquid
Aspect product, powder sample, particulate samples can be widely applied to the production of the fields such as cloth, paper, dyestuff, coating, beverage, plastics
The raw material at line scene and the color measuring of product.
Description of the drawings
The portable color measurement instrument schematic top plan views of Fig. 1.
The portable color measurement instrument elevational schematic views of Fig. 2.
The portable color measurement instrument schematic side views of Fig. 3.
The portable color measurement instrument internal structure schematic diagrams of Fig. 4.
The portable color measurement instrument operation principle schematic diagrams of Fig. 5.
It is marked in figure：101-handle, 102-measure button, 103-touch screen displays, 104-portable color measuring
The small dent of instrument bottom surrounding, 201-measurement bottom cover, 202-sample, the side wall of 203-measurement bottom cover, 301-light source,
302-integrating sphere, 303-thang-kng window, 304-measurement window, 305-condenser, 306-monochromator, 307-array CCD
Sensor, 308-analog-digital converter, 309-microprocessor, 310-power supply, 311-memory, 312-USB interface.
Specific embodiment
In order to more clearly describe present disclosure, present disclosure is carried out below with reference to accompanying drawings and embodiments
Narration in detail.It should be appreciated that the following examples are in order to further illustrate the present invention, it is not intended to limit present disclosure.
In the present embodiment, the appearance of portable color measurement instrument be rectangular shape, specifically as shown in Figure 1, Figure 2, Fig. 3 institutes
Show.A length of 20cm of the portable color measurement instrument, it is wide consistent with high size for 10cm.On portable color measurement instrument top
Portion has handle 101 easy to carry and operates, and in one end of handle, there are one measure button 102 to control portable color measuring
The measurement of instrument.There are one touch screen displays 103 at the top of portable color measurement instrument, for selecting and showing measurement data.Just
Taking the bottom of formula color measurement instrument, there are one circular measurement window 304, aperture 0.5cm.In portable color measurement instrument
Side be used for equipped with USB interface 312 to instrument power source charging and data transmission, and equipped with power switch for starting or close
Instrument.Portable color measurement instrument bottom surface surrounding has small dent 104.
The portable color measurement instrument of the present embodiment, which is equipped with, measures bottom cover 201, as shown in Fig. 3, Fig. 4.The measurement
Bottom cover is cuboid trough-like shapes, and whole length and wide size are consistent with the length of portable color measurement instrument and wide size
Respectively 20cm and 10cm, a height of 2cm.The thickness for measuring the side wall 203 of bottom cover is 0.2cm, with portable color measurement instrument bottom
The small dent 104 of face surrounding matches, and when measurement just covers the bottom of portable color measurement instrument, so as to eliminate ambient enviroment
Influence of the light to measurement result.In the measurement bottom cover and there are one the matched positions of measurement window of portable color measurement instrument
Circular setting-out groove, for placing ligh trap or standard white plate or sample 202.The portable color measurement instrument equipped with
Planchet, the size of the planchet are matched with measuring the size of setting-out groove in bottom cover.The planchet can place solid-state
Sample, liquid sample, powder sample, particulate samples, and using the reflected light of integrating sphere collection sample（Including each of sample reflection
The reflected light in a direction）, thus portable color measurement instrument can be to the material of the variforms such as solid-state, liquid, powder, particle
Sample carries out color measuring, has very extensive application field.
The portable color measurement instrument of the present embodiment is shown by optical measurement unit, microprocessor 309, memory 311, touch screen
Show that the components such as device 103, USB interface 312, power supply 310, cable, shell form, as shown in Figure 4.
The optical measurement unit of the present embodiment is by light source 301, integrating sphere 302, condenser 305, monochromator 306, array CCD
Sensor 307, analog-digital converter 308 form.The light source 301 is stroboscopic light sources, the effective wavelength range of spectrum for 360 ~
800nm, the flash intensity and flash time of light source are by chip controls so that the luminous flux to glisten every time is very high, and ensures every
The luminous flux of secondary flash of light is consistent, can effectively improve the signal-to-noise ratio of instrument.The radius size of the integrating sphere 302 is 4cm, interior
Portion is coated with the white diffusing reflection coating of high reflectance, can play good homogenization, and collect anti-through sample to measuring light
All reflected lights penetrated（Sample is mirror-reflection or diffusing reflection）.The condenser 305 mainly converges to measuring light
Poly- effect, preferably to enter monochromator.The monochromator 306 is fixed wave length structure, and function is acted on for light splitting, will
The measurement photodegradation that entrance slit enters is monochromatic light, and is projected by corresponding exit slit.The array CCD sensor 307
It is close to 306 exit slit of monochromator, for measuring the light intensity of each exit slit corresponding wavelength.The work of the analog-digital converter 308
Be by array CCD sensor 307 measure obtained analog signal be converted into being transmitted further to after digital signal microprocessor 309 into
Row data processing.
Initial data of the microprocessor 309 of the present embodiment acquired in for processing and calculating optical measuring unit, calculates
Go out the color parameter of sample, and communicate with components such as memory 311, touch screen displays 103, USB interfaces 312.
The touch screen displays 103 of the present embodiment can select to check that history measures number for showing current measurement data
According to.
The memory 311 of the present embodiment is used to store measurement data and internal algorithm.
The power supply 310 of the present embodiment is chargeable lithium ion battery, for portions such as optical measurement unit, microprocessors
Part is powered.
The operation principle of portable color measurement instrument in the present embodiment is as shown in Figure 5：During measurement, touch and measure button,
Homogenized inside integrating sphere 302 by multiple diffusing reflection by the light that light source 301 is sent out, at the same the reflected light of sample 202 by
Integrating sphere collection homogenizes, and measures light and projects arrival condenser 305 by the thang-kng window 303 of integrating sphere side, condenser 305 converges
Monochromator 306 is entered by entrance slit afterwards, it is monochromatic light that the optical elements such as grating inside monochromator 306, which will measure photodegradation,
And it is projected by corresponding exit slit；The light intensity for obtaining corresponding wavelength is measured by array CCD sensor 307 again, and is turned by modulus
Array CCD sensor 307 is measured the analog signal obtained and is converted to digital signal, and be transferred to microprocessor 309 by parallel operation 308
Carry out data processing.Microprocessor 309 combines the reflection that the data that zero point correction is calibrated with standard white plate calculate sample
Rate spectrum further calculates color parameter of the sample in the different colour spaces according to the reflectance spectrum of sample.
It measures the color parameter obtained to be shown by touch screen displays 103, while storage is carried out by memory 311 and is called for the later stage.It is described
The internal algorithm of portable color measurement instrument is with reference to the computational methods of the standards such as ISO, ASTM, GB/T, it is ensured that from original measurement number
According to color parameter conversion method accurately and reliably.
The measurement procedure of the portable color measurement instrument of the present embodiment is as described below, with reference to figure 4, Fig. 5.
（1）Carry out zero point correction.
Ligh trap is placed in the setting-out groove for measuring bottom cover 201, portable color measurement instrument, which is placed on, measures bottom cover 201
On, the side wall 203 for measuring bottom cover 201 is matched with the small dent 104 of portable color measurement instrument bottom surrounding, is just covered portable
The bottom of formula color measurement instrument, then ligh trap face and the closely measurement window 304 of portable color measurement instrument.It touches and measures button
102, the light beam that light source 301 generates enters integrating sphere 302, and by 302 inside of integrating sphere, repeatedly diffusing reflection homogenizes, and is irradiated to simultaneously
Light on ligh trap is absorbed by ligh trap, thang-kng window 303 directive condenser 305 of the light by 302 side of integrating sphere is measured, by condenser
305 converge to the entrance slit of monochromator 306, and will measure monochromatic light of the photodegradation into different wave length by monochromator 306, by right
The exit slit answered projects, then the light intensity of corresponding wavelength is measured by array CCD sensor 307.Through analog-digital converter 308 by battle array
The analog signal that row ccd sensor 307 measures is converted to digital data transmission to microprocessor 309, is counted by microprocessor 309
Calibration data after calculation processing as zero is stored in memory 311 for use.
（2）Carry out the calibration of standard white plate.
Standard white plate is placed in the setting-out groove for measuring bottom cover 201, portable color measurement instrument is placed on measurement bottom cover
On 201, the side wall 203 for measuring bottom cover 201 is matched with the small dent 104 of portable color measurement instrument bottom surrounding, is just covered
The bottom of portable color measurement instrument, then standard white plate face and the closely measurement window 304 of portable color measurement instrument.It touches
Button 102 is measured, the light beam that light source generates enters integrating sphere 302, and repeatedly diffusing reflection homogenizes by 302 inside of integrating sphere, simultaneously
The reflected light of standard white plate is homogenized by integrating sphere collection, measures thang-kng window 303 directive condenser of the light by 302 side of integrating sphere
305,306 entrance slit of monochromator is converged to, and will measure photodegradation into different wave length by monochromator 306 by condenser 305
Monochromatic light is projected by corresponding exit slit, then the light intensity of corresponding wavelength is measured by array CCD sensor 307.Turn through modulus
The analog signal that array CCD sensor 307 measures is converted to digital data transmission to microprocessor 309 by parallel operation 308, by micro-
It is stored in memory 311 for use as the calibration data of standard white plate after 309 calculation processing of processor.
（3）It carries out sample measurement and obtains color parameter.
Sample is positioned in planchet, and by the planchet for installing sample be placed in measure bottom cover 201 setting-out it is recessed
In slot, portable color measurement instrument, which is placed on, to be measured on bottom cover 201, measures the side wall 203 of bottom cover 201 and portable color measuring
The small dent 104 of instrument bottom surrounding matches, and just covers the bottom of portable color measurement instrument, then sample face and closely
The measurement window 304 of portable color measurement instrument.It touches and measures button 102, the light beam that light source generates enters integrating sphere 302, passes through
Crossing 302 inside of integrating sphere, repeatedly diffusing reflection homogenizes, while the reflected light of sample 202 is homogenized by integrating sphere collection, measures light
By the 303 directive condenser 305 of thang-kng window of 302 side of integrating sphere, 306 entrance slit of monochromator is converged to by condenser 305,
And photodegradation will be measured into the monochromatic light of different wave length by monochromator 306, it is projected by corresponding exit slit, then by array CCD
Sensor 307 measures the light intensity of corresponding wavelength.The simulation for measuring array CCD sensor 307 through analog-digital converter 308 is believed
Digital data transmission number is converted to microprocessor 309, microprocessor 309 combines the number that zero point correction and standard white plate are calibrated
According to calculating the reflectance spectrum of sample 202.Sample is further calculated according to the reflectance spectrum of sample
In the CIE1931 XYZ colour spaces, CIELAB color space, the color parameter in the CIELUV colour spaces.Measure the color parameter obtained
It is shown by touch screen displays 103, while storage is carried out by memory 311 and is called for the later stage.
In the present embodiment, the portable color measurement instrument is required for carrying out before each unlatching carries out sample measurement
The calibration of zero point correction and standard white plate.Zero point correction has been carried out every time with after standard white plate calibration, carrying out certain number
After sample measures, it is necessary to re-start zero point correction and be calibrated with standard white plate.The precision measured to ensure sample, in zero twice
The number of sample measurement can be carried out between calibration and standard white plate calibration no more than 100 times.
Portable color measurement instrument in the present embodiment has high certainty of measurement, and favorable repeatability, measurement efficiency is high, small
Skilful light, easy to carry, simple operation and other advantages.
Claims (9)
1. a kind of portable color measurement instrument, it is characterised in that：Portable color measurement instrument has high certainty of measurement, repeatability
Good, measurement efficiency is high, and small volume and less weight is easy to carry, it is easy to operate the advantages of, can be widely applied to cloth, paper, dyestuff, painting
The raw material at production line scene in the fields such as material, beverage, plastics and the color measuring of product.
2. a kind of portable color measurement instrument according to claim 1, it is characterised in that：The portable color measurement instrument
Appearance for rectangular shape, a length of 18 ~ 25cm of cuboid, cuboid it is wide consistent with high size for 8 ~ 12cm；It is described
Portable color measurement instrument top design has handle, measures button and touch screen displays；The bottom of the portable color measurement instrument
For portion's design there are one circular measurement window, aperture is 0.5 ~ 1.0cm；The lateral layout of the portable color measurement instrument has
USB interface, and be used to start or close instrument equipped with power switch；The portable color measurement instrument bottom surface surrounding is designed with small
Dent；The portable color measurement instrument is equipped with measurement bottom cover, measures the side wall of bottom cover and the bottom of portable color measurement instrument
The small dent matching of face surrounding, when measurement, just cover the bottom of portable color measurement instrument so as to eliminate surrounding environment light to surveying
Measure the influence of result；There are one circular with the matched position of measurement window of portable color measurement instrument in the measurement bottom cover
Setting-out groove, for placing ligh trap or standard white plate or sample to be tested；The portable color measurement instrument is equipped with planchet, institute
The size for stating planchet is matched with measuring the size of setting-out groove in bottom cover；The planchet can place solid sample, liquid
Sample, powder sample, particulate samples, and using the reflected light of integrating sphere collection sample（All directions including sample reflection
Reflected light）, thus portable color measurement instrument can measure the material sample of the variforms such as solid-state, liquid, powder, particle
Color.
3. a kind of portable color measurement instrument according to claim 1, it is characterised in that：The portable color measurement instrument
It is made of components such as optical measurement unit, microprocessor, memory, touch screen displays, USB interface, power supply, cable, shells.
4. a kind of portable color measurement instrument according to claim 3, it is characterised in that：The optical measurement unit is by light
Source, integrating sphere, condenser, monochromator, array CCD sensor, analog-digital converter composition；The light source be stroboscopic light sources, spectrum
Effective wavelength range for 360 ~ 800nm, the flash intensity and flash time of light source are by chip controls so that the light to glisten every time
Flux is very high, and ensures that the luminous flux to glisten every time is consistent, can effectively improve the signal-to-noise ratio of instrument；The integrating sphere
Radius size is 2.5 ~ 5cm, and inside is coated with the white diffusing reflection coating of high reflectance, and measurement light can be played and homogenized well
Effect, and collect all reflected lights reflected through sample（Sample is mirror-reflection or diffusing reflection）；The condenser master
Convergence effect is carried out to measuring light, preferably to enter monochromator；The monochromator is fixed wave length structure, and function is
Light splitting acts on, i.e., is monochromatic light, and projected by corresponding exit slit by the measurement photodegradation that entrance slit enters；The array
Ccd sensor is close to the exit slit of monochromator, for measuring the light intensity of each exit slit corresponding wavelength；The analog-digital converter
Effect be to be converted into being transmitted further to microprocessor after digital signal by the analog signal that array CCD sensor measurement obtains to carry out
Data processing.
5. a kind of portable color measurement instrument according to claim 3, it is characterised in that：The portable color measurement instrument
Operation principle be：It during measurement, touches and measures button, the light sent out by light source is even by multiple diffusing reflection inside integrating sphere
Change, while the reflected light of sample is homogenized by integrating sphere collection, measure light and arrival is projected by the thang-kng window of integrating sphere side
Condenser enters monochromator after condenser convergence by entrance slit, and the optical elements such as grating inside monochromator will measure light point
It solves as monochromatic light, and is projected by corresponding exit slit；The light intensity of corresponding wavelength is obtained by array CCD sensor measurement again, and
The analog signal that array CCD sensor measurement obtains is converted into digital signal, and be transferred to microprocessor by analog-digital converter
Carry out data processing；Microprocessor combination zero point correction and the data of standard white plate calibration calculate the reflectivity light of sample
Spectrum, color parameter of the sample in the different colour spaces is further calculated according to the reflectance spectrum of sample；It measures
The color parameter obtained is shown by touch screen displays, while is carried out storage by memory and called for the later stage；The portable color
The internal algorithm of measuring instrument is with reference to the computational methods of the standards such as ISO, ASTM, GB/T, it is ensured that joins from raw measurement data to color
Number conversion method is accurately and reliably.
6. a kind of portable color measurement instrument according to claim 3, it is characterised in that：The portable color measurement instrument
Measurement procedure it is as described below：
（1）Carry out zero point correction
Ligh trap is placed in the setting-out groove for measuring bottom cover, portable color measurement instrument, which is placed on, to be measured on bottom cover, measures bottom cover
Side wall matched with the small dent of portable color measurement instrument bottom surrounding, just cover the bottom of portable color measurement instrument,
Then ligh trap face and the closely measurement window of portable color measurement instrument；It touches and measures button, the light beam that light source generates enters product
Bulb separation by repeatedly diffusing reflection homogenizes, while be irradiated to the light on ligh trap and absorbed by ligh trap inside integrating sphere, measures light by integrating
The thang-kng window directive condenser of ball side converges to monochromator entrance slit, and will measure light point by monochromator by condenser
Solution is projected, then go out the light of corresponding wavelength by array CCD sensor measurement into the monochromatic light of different wave length by corresponding exit slit
By force；Through analog-digital converter by array CCD sensor measurement to analog signal be converted to digital data transmission to microprocessor, by
It is stored in memory for use as the calibration data of zero after microprocessor calculation processing；
（2）Carry out the calibration of standard white plate
Standard white plate is placed in the setting-out groove for measuring bottom cover, portable color measurement instrument, which is placed on, to be measured on bottom cover, is measured
The side wall of bottom cover is matched with the small dent of portable color measurement instrument bottom surrounding, just covers the bottom of portable color measurement instrument
Portion, then standard white plate face and the closely measurement window of portable color measurement instrument；It touches and measures button, the light beam that light source generates
Into integrating sphere, by repeatedly diffusing reflection homogenizes inside integrating sphere, while the reflected light of standard white plate is homogenized by integrating sphere collection,
Light is measured by the thang-kng window directive condenser of integrating sphere side, monochromator entrance slit is converged to, and by monochrome by condenser
Device will measure photodegradation into the monochromatic light of different wave length, be projected by corresponding exit slit, then gone out by array CCD sensor measurement
The light intensity of corresponding wavelength；Through analog-digital converter by array CCD sensor measurement to analog signal be converted to digital data transmission
To microprocessor, it is stored in memory for use by the calibration data as standard white plate after microprocessor calculation processing；
（3）It carries out sample measurement and obtains color parameter
Sample is positioned in planchet, and the planchet for installing sample is placed in the setting-out groove for measuring bottom cover, just
The formula color measurement instrument of taking, which is placed on, to be measured on bottom cover, measures the small recessed of the side wall of bottom cover and portable color measurement instrument bottom surrounding
Trace matches, just cover the bottom of portable color measurement instrument, then sample face and closely portable color measurement instrument
Measurement window；It touching and measures button, the light beam that light source generates enters integrating sphere, by repeatedly diffusing reflection homogenizes inside integrating sphere,
The reflected light of sample is homogenized by integrating sphere collection simultaneously, measures thang-kng window directive condenser of the light by integrating sphere side,
Monochromator entrance slit is converged to, and will measure monochromatic light of the photodegradation into different wave length by monochromator by condenser, by corresponding to
Exit slit project, then go out by array CCD sensor measurement the light intensity of corresponding wavelength；Array CCD is passed through analog-digital converter
The analog signal that sensor measures is converted to digital data transmission to microprocessor, microprocessor combination zero point correction and standard white
The data of plate calibration calculate the reflectance spectrum of sample；It is further calculated according to the reflectance spectrum of sample
Color parameter of the sample in the different colour spaces；The color parameter obtained is measured to be shown by touch screen displays, while by depositing
Reservoir carries out storage and is called for the later stage.
7. a kind of portable color measurement instrument according to claim 6, it is characterised in that：The portable color measurement instrument
The different colour spaces may be used to represent the color parameter of sample, and can be selected between these different colour spaces
Switching, the used colour space include the CIE1931 XYZ colour spaces, CIELAB color space, the CIELUV colour spaces.
8. a kind of portable color measurement instrument according to claim 6, it is characterised in that：The portable color measurement instrument
In sample measurement is carried out, one can be selected to measure sample and be used as with reference to sample, in the measurement of the other samples of progress,
Portable color measurement instrument can measure and calculate sample and the colour difference of reference sample.
9. a kind of portable color measurement instrument according to claim 6, it is characterised in that：The portable color measurement instrument
Before each unlatching carries out sample measurement, it is required for carrying out the calibration of zero point correction and standard white plate；Zero school is carried out every time
After the accurate calibration with standard white plate, after the sample for carrying out certain number measures, it is necessary to re-start zero point correction and standard white plate
Calibration；The precision measured to ensure sample can carry out sample measurement between zero point correction twice and standard white plate calibration
Number is no more than 100 times.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810116882.6A CN108195469B (en) | 2018-02-06 | 2018-02-06 | Portable color measuring instrument |
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|---|---|---|---|
| CN201810116882.6A CN108195469B (en) | 2018-02-06 | 2018-02-06 | Portable color measuring instrument |
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| CN108195469B CN108195469B (en) | 2021-03-02 |
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