CN109211405A - A kind of electric light source stroboscopic analysis method based on spectrum analysis - Google Patents
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Abstract
The electric light source stroboscopic analysis method based on spectrum analysis that the invention discloses a kind of, comprising: select tested lamps and lanterns, acquire spatial distribution data；Spectroflash ratio is calculated, by spectroflash ratio compared with spectrometer signal-to-noise ratio, and stroboscopic is tentatively judged whether there is, if being unsatisfactory for condition, continues to analyze；It calculates and is no less than the corresponding lumen fraction of 50 groups of spatial distributions；It is fitted the function expression of lumen fraction R (t), and calculates flicker frequency f and visual flicker percentage, lamps and lanterns stroboscopic situation is judged according to flicker frequency f and visual flicker percentage, output lamps and lanterns flicker frequency and visual flicker percentage, analysis terminate.This method only needs that electric light source stroboscopic quantitative analysis can be carried out using most basic, the most popular equipment spectrometer of optical research analysis, and relevant calculation parameter and process physical meaning are clear.
Description
Technical field
The present invention relates to Healthy Lighting fields, more particularly to the electric light source stroboscopic analysis method based on spectrum analysis.
Background technique
The stroboscopic of electric light source refer to electric light source issue light be at any time in quick, duplicate variation so that light source bounce and
It is unstable, the phenomenon that causing luminous flux of light source to fluctuate.It is main to generate electric light source stroboscopic reason are as follows: light source power supply frequency is low, voltage
The factors such as big, the light source luminescent principle of fluctuation cause.Current research shows that the harm of electric light source stroboscopic is main are as follows: illusion causes work
Hurt accident；Induce photosensitive personnel's epileptics, migraine, nausea etc.；Teen-age glasses are injured, myopia is caused.
Attention with people to light health, current many consumers can taken pictures when choosing electric light source using mobile phone
Or under camera shooting state, alignment target electric light source is sentenced by whether occurring striped or the different scintillation of light and shade on viewing screen
Disconnected surveyed electric light source whether there is stroboscopic phenomenon.This method only can be rough qualitative judgement, can not accurate quantification study electric light source
Stroboscopic phenomenon.The authoritative institutions such as IEEE often pass through measurement electric light source illumination change over time, calculate scintillation index, stroboscopic depth,
Modulation depth, fluctuation depth etc., quantitative study electric light source stroboscopic phenomenon.But this method needs to utilize light source stroboscopic tester, number
Word oscillograph etc., equipment is relatively expensive, and popularity is lower.
Therefore it provides a kind of using the transient state spatial distribution number for being tested electric light source in spectrometer high frequency acquisition certain time
According to by the preliminary stroboscopic situation for judging electric light source of peak value flashing of spatial distribution；Recycle photopic vision spectral luminous efficiency function V
(λ), the relative light intensity flashing state arrived by Matlab the Fitting Calculation eye-observation and frequency, careful analysis electric light source stroboscopic feelings
Condition can effectively avoid using the expensive professional equipment such as light source stroboscopic tester, be of great significance.
Summary of the invention
It is existing based on spectrum analysis quantitative analysis electric light source stroboscopic the purpose of the invention is to realize to utilize conventional spectrograph
As proposing and calculating spectroflash by transient state spatial distribution data first and judge tested electric light source than preliminary whether there is or not stroboscopics；Again
It according to photopic vision spectral luminous efficiency function is combined, is fitted by using not less than 8 rank Fourier spaces, calculates flicker frequency and view
Feel flashing percentage quantitative analysis electric light source stroboscopic；Finally by corresponding threshold decision electric light source, whether there is or not stroboscopics.
The present invention is realized by following technical proposals.
A kind of electric light source stroboscopic analysis method based on spectrum analysis, includes the following steps:
Step 1, tested lamps and lanterns are selected, spatial distribution P (λ) data are acquired；
Step 2, spectroflash ratio SFP is calculated, spectroflash ratio SFP is sentenced compared with spectrometer Signal to Noise Ratio (SNR), and tentatively
Disconnected whether to have stroboscopic, if SFP≤3 × SNR, lamps and lanterns are without stroboscopic；Analysis terminates；If SFP 3 × SNR of >, continues to analyze；
Step 3, it calculates and is no less than the corresponding lumen fraction R (t) of 50 groups of spatial distribution P (λ):
By OriginPro software, the photopic vision light that CIE (International Commission on Illumination) is provided using Asym2Sig function
Spectrum luminous efficiency function V (λ) is fitted；Using Excel software, it is fitted and is expressed according to photopic vision spectral luminous efficiency function V (λ)
Formula calculates the functional value with spatial distribution P (λ) same scan step-length, and calculates and be no less than 50 groups of P (λ) × V (λ)；It utilizes
The Integrate function of OriginPro software calculates and is no less than 50 lumen fraction R (t)；
Step 4, it is fitted the function expression of lumen fraction R (t), and calculates flicker frequency f and visual flicker percentage
VFP；
Step 5, lamps and lanterns stroboscopic situation is judged according to flicker frequency f and visual flicker percentage VFP:
If f >=400Hz or VFP≤1%, lamps and lanterns terminate without stroboscopic, analysis；
If f < 400Hz or VFP > 1%, lamps and lanterns have stroboscopic, output lamps and lanterns flicker frequency f and visual flicker hundred
Score VFP, analysis terminate.
For above-mentioned technical proposal, there are also further preferred schemes by the present invention:
Further, in the step 1), spatial distribution P (λ) data is acquired, are obtained by following step:
1a) selection needs the lamps and lanterns studied, its normal work is made under 220V, 50Hz alternating current；
High frequency light spectrometer 1b) is utilized in darkroom, the time of integration is not more than 1ms, acquires tested lamps and lanterns not less than in 50ms
380-780nm visible light wave range spatial distribution P (λ) data obtain no less than 50 groups of spatial distribution P (λ) data.
Further, it in the step 2), calculates spectroflash ratio SFP and is obtained by following step:
No less than 50 groups of spatial distribution P 2a) are drawn in a width figure using OriginPro, Matlab and Excel software
(λ)；
2b) find the peak-peak P (λ) in no less than 50 groups of spatial distribution P (λ)max, and no less than 50 groups of spectrum point
Minimum peak P (λ) in cloth P (λ)min；
The spectroflash ratio SFP of the lamps and lanterns 2c) is calculated using formula (1).
Further, the step 4) carries out according to the following procedure:
4a) using the tool box cftool in Matlab software, using logical not less than 8 rank Fourier spaces fitting light relatively
Measure the function expression of R (t)；
4b) according to the function expression of lumen fraction R (t), drawn using OriginPro software, by cycle of oscillation pair
T between seasonable1With t2, calculate flicker frequency f=1/ (t2-t1)；
4c) by the functional image of lumen fraction R (t), the maximum value R (t) of lumen fraction R (t) is foundmaxWith minimum
Value R (t)min, computation vision flashing percentage VFP.
The present invention has the advantages that due to taking above technical scheme
The analysis method first by be no less than 50 groups of spatial distribution P (λ) can quicklook observation electric light source stroboscopic feelings
Condition, calculating spectroflash ratio SFP simply can tentatively judge electric light source stroboscopic situation.It is fitted photopic vision spectral luminous efficiency function V
(λ), lumen fraction R (t) and its function expression are calculated, and calculates flicker frequency f and visual flicker percentage VFP, can had
Effect avoids the quantitative analysis of electric light source stroboscopic must be using equipment such as light source stroboscopic tester, digital oscilloscopes.This method only needs benefit
Electric light source stroboscopic quantitative analysis, relevant calculation ginseng can be carried out by researching and analysing most basic, most popular equipment spectrometer with optics
It is several clear with process physical meaning.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not
Inappropriate limitation of the present invention is constituted, in the accompanying drawings:
Fig. 1 is the electric light source stroboscopic research method flow chart based on spectrum analysis；
Fig. 2 is 50 groups of spatial distribution P (λ) figures of incandescent lamp 380-780nm wave band；
Fig. 3 is 50 R (t) of incandescent lamp and its Fourier space fitted figure；
Fig. 4 is 50 groups of spatial distribution P (λ) of LED filament lamp 380-780nm wave band and its partial enlarged view；
Fig. 5 is 50 R (t) of LED filament lamp and its Fourier space fitted figure；
Fig. 6 is 50 groups of spatial distribution P (λ) of iodine-tungsten lamp 380-780nm wave band and its partial enlarged view；
Fig. 7 is 50 R (t) of iodine-tungsten lamp and its Fourier space fitted figure.
Specific embodiment
Below in conjunction with attached drawing and specific embodiment, the present invention will be described in detail, herein illustrative examples of the invention
And explanation is used to explain the present invention, but not as a limitation of the invention.
Embodiment 1:
The present embodiment is the frequency using present invention analysis 20W incandescent lamp under 220V, 50Hz alternating current in course of normal operation
It dodges, the specific steps are as follows: referring to Fig. 1, Fig. 2, Fig. 3.
Step 1, tested lamps and lanterns are selected, spatial distribution P (λ) data are acquired:
It selects 20W incandescent lamp 1a) to be tested lamps and lanterns, it is allowed to work normally under 220V, 50Hz alternating current；
The Ocean Optics UBS2000+ type spectrometer that Ocean Optics of the U.S. 1b) are utilized in darkroom, when integral
Between 1ms, acquire incandescent lamp 50ms in 380-780nm visible light wave range spatial distribution P (λ) data, i.e. 50 groups of spatial distribution P (λ)
Data.
Step 2, spectroflash ratio SFP is calculated, and tentatively judges whether there is stroboscopic:
50 groups of spatial distribution P (λ) 2a) are drawn in a width figure using softwares such as OriginPro, Matlab, Excel；
2b) find the peak-peak P (λ) in 50 groups of spatial distribution P (λ)maxAnd in 50 groups of spatial distribution P (λ) most
Small leak P (λ)min, numerical value is respectively 50356,30073；
The spectroflash ratio SFP=50.44% of the lamps and lanterns 2c) is calculated using formula (6).
2d) Ocean Optics UBS2000+ type spectrometer Signal to Noise Ratio (SNR)=0.4% of Ocean Optics of the U.S.,
SFP 3 × SNR of >, continues to analyze.
Step 3, the corresponding lumen fraction R (t) of 50 groups of spatial distribution P (λ) is calculated:
3a) by OriginPro software, CIE (International Commission on Illumination) nineteen twenty-four is provided using Asym2Sig function
Photopic vision spectral luminous efficiency function V (λ) be fitted, fitting result be formula (7), coefficient R2=0.99903
Excel software 3b) is utilized, according to photopic vision spectral luminous efficiency function V (λ) fitting expression, is calculated and spectrum point
The functional value of cloth P (λ) same scan step-length 0.37nm, and calculate 50 groups of P (λ) × V (λ).
The Integrate function of 3c) utilizing OriginPro software, calculates 50 lumen fraction R (t) of incandescent lamp, counts
It calculates formula and sees formula (8)
Step 4,50 lumen fraction R (t) for being fitted incandescent lamp change with time function expression, and calculate flashing
Frequency f and visual flicker percentage VFP:
4a) using the tool box cftool in Matlab software, using 50 phases of 8 rank Fourier spaces fitting incandescent lamp
To the function expression of luminous flux R (t), fitting result is shown in formula (9), coefficient R2=0.8993, root-mean-square error RMSE=
4.038×103
4b) according to the function expression of lumen fraction R (t), incandescent lamp lumen fraction is drawn using OriginPro software
The Fourier space of R (t) is fitted image, is fitted in determining a cycle by incandescent lamp Fourier space and corresponds to t2With t1, t2=
32.4ms、t1=19.5ms calculates incandescent lamp flicker frequency f=1/ (t2-t1)=77.52Hz.
4c) by the functional image of incandescent lamp lumen fraction R (t), amplitude maximum R (t) is foundmaxWith minimum value R
(t)min, R (t)max=4558034, R (t)min=1616767.Computation vision flashes percentage VFP=95.27%, calculation formula
See formula (10)
Step 5, incandescent lamp stroboscopic situation is judged according to flicker frequency f and visual flicker percentage VFP:
Because of VFP=95.27% > 1%, therefore lamps and lanterns have stroboscopic, export incandescent lamp flicker frequency f=77.52Hz, vision
Percentage VFP=95.27% is flashed, analysis terminates.
Embodiment 2:
The present embodiment is to utilize present invention analysis 20W LED filament lamp under 220V, 50Hz alternating current in course of normal operation
Stroboscopic, the specific steps are as follows: referring to Fig. 1, Fig. 4, Fig. 5.
Step 1, tested lamps and lanterns are selected, spatial distribution P (λ) data are acquired:
1a) selecting global certain esbablished corporation 20W LED filament lamp is tested lamps and lanterns, allowed under 220V, 50Hz alternating current its just
Often work；
The FX2000 fiber spectrometer of Shanghai Fu Xiang optics limited liability company, the time of integration 1b) are utilized in darkroom
1ms acquires 380-780nm visible light wave range spatial distribution P (λ) data, i.e. 50 groups of spatial distribution P (λ) in LED filament lamp 50ms
Data.
Step 2, spectroflash ratio SFP is calculated, and tentatively judges whether there is stroboscopic:
50 groups of spatial distribution P (λ) 2a) are drawn in a width figure using softwares such as OriginPro, Matlab, Excel；
2b) LED filament light Spectral structure partial enlargement finds the peak-peak P (λ) in 50 groups of spatial distribution P (λ)max,
And the minimum peak P (λ) in 50 groups of spatial distribution P (λ)min, numerical value is respectively 55463,54295；
The spectroflash ratio SFP=2.13% of the lamps and lanterns 2c) is calculated using formula (11).
2d) FX2000 fiber spectrometer Signal to Noise Ratio (SNR)=0.25%, SFP > 3 of Shanghai Fu Xiang optics limited liability company
× SNR continues to analyze.
Step 3, the corresponding lumen fraction R (t) of 50 groups of spatial distribution P (λ) is calculated:
3a) by OriginPro software, CIE (International Commission on Illumination) nineteen twenty-four is provided using Asym2Sig function
Photopic vision spectral luminous efficiency function V (λ) be fitted, fitting result be formula (12), coefficient R2=0.99903
Excel software 3b) is utilized, according to photopic vision spectral luminous efficiency function V (λ) fitting expression, is calculated and spectrum point
The functional value of cloth P (λ) same scan step-length 0.31nm, and calculate 50 groups of P (λ) × V (λ).
The Integrate function of 3c) utilizing OriginPro software, calculates 50 lumen fraction R of LED filament lamp
(t), calculation formula is shown in formula (13)
Step 4, be fitted LED filament lamp 50 lumen fraction R (t) function expression, and calculate flicker frequency f with
Visual flicker percentage VFP:
4a) using the tool box cftool in Matlab software, using the 50 of 8 rank Fourier spaces fitting LED filament lamp
The function expression of a lumen fraction R (t), fitting result are shown in formula (14), coefficient R2=0.8623, root-mean-square error
RMSE=439.8
4b) according to the function expression of LED filament lamp R (t) (14), it is opposite that LED filament lamp is drawn using OriginPro software
The Fourier space of luminous flux R (t) is fitted image, is fitted in determining a cycle by LED filament lamp Fourier space and corresponds to t2
With t1, t2=23.2ms, t1=38.1ms calculates LED filament lamp flicker frequency f=1/ (t2-t1)=67.11Hz.
4c) by the functional image of LED filament lamp lumen fraction R (t), amplitude maximum R (t) is foundmaxWith minimum value R
(t)min, R (t)max=4119260, R (t)min=4098905.Computation vision flashes percentage VFP=0.50%, calculation formula
See formula (15)
Step 5, LED filament lamp stroboscopic situation is judged according to flicker frequency f and visual flicker percentage VFP:
Because of VFP=0.50% < 1%, therefore the LED filament lamp, without stroboscopic, analysis terminates.
Embodiment 3:
The present embodiment is the frequency using present invention analysis 20W iodine-tungsten lamp under 220V, 50Hz alternating current in course of normal operation
It dodges, the specific steps are as follows: referring to Fig. 1, Fig. 6, Fig. 7.
Step 1, tested lamps and lanterns are selected, spatial distribution P (λ) data are acquired:
1a) selecting national certain large enterprise 20W iodine-tungsten lamp is tested lamps and lanterns, allows its normal work under 220V, 50Hz alternating current
Make；
The Ocean Optics UBS2000+ type spectrometer that Ocean Optics of the U.S. 1b) are utilized in darkroom, when integral
Between 1ms, acquire iodine-tungsten lamp 50ms in 380-780nm visible light wave range spatial distribution P (λ) data, i.e. 50 groups of spatial distribution P (λ)
Data.
Step 2, spectroflash ratio SFP is calculated, and tentatively judges whether there is stroboscopic:
50 groups of spatial distribution P (λ) 2a) are drawn in a width figure using softwares such as OriginPro, Matlab, Excel；
2b) iodine-tungsten lamp spatial distribution partial enlargement finds the peak-peak P (λ) in 50 groups of spatial distribution P (λ)max, and
Minimum peak P (λ) in 50 groups of spatial distribution P (λ)min, numerical value is respectively 55056,52992；
The spectroflash ratio SFP=3.82% of iodine-tungsten lamp 2c) is calculated using formula (16).
2d) Ocean Optics UBS2000+ type spectrometer Signal to Noise Ratio (SNR)=0.4% of Ocean Optics of the U.S.,
SFP 3 × SNR of > needs to continue to analyze.
Step 3, the corresponding lumen fraction R (t) of 50 groups of spatial distribution P (λ) of iodine-tungsten lamp is calculated:
3a) by OriginPro software, CIE (International Commission on Illumination) nineteen twenty-four is provided using Asym2Sig function
Photopic vision spectral luminous efficiency function V (λ) be fitted, fitting result be formula (17), coefficient R2=0.99903
Excel software 3b) is utilized, according to photopic vision spectral luminous efficiency function V (λ) fitting expression, is calculated and spectrum point
The functional value of cloth P (λ) same scan step-length 0.37nm, and calculate 50 groups of P (λ) × V (λ).
The Integrate function of 3c) utilizing OriginPro software, calculates 50 lumen fraction R (t) of iodine-tungsten lamp, counts
It calculates formula and sees formula (18)
Step 4, it is fitted the function expression of 50 lumen fraction R (t) of iodine-tungsten lamp, and calculates flicker frequency f and view
Feel flashing percentage VFP:
4a) using the tool box cftool in Matlab software, using 50 phases of 8 rank Fourier spaces fitting iodine-tungsten lamp
To the function expression of luminous flux R (t), fitting result is shown in formula (19), coefficient R2=0.8724, root-mean-square error RMSE=
2431。
4b) according to the function expression of iodine-tungsten lamp lumen fraction R (t) (19), iodine-tungsten lamp is drawn using OriginPro software
The Fourier space of lumen fraction R (t) is fitted image, is fitted in determining a cycle by iodine-tungsten lamp Fourier space and corresponds to t2
With t1, t2=32.4ms, t1=27.2ms calculates iodine-tungsten lamp flicker frequency f=1/ (t2-t1)=192.31Hz.
4c) by the functional image of iodine-tungsten lamp lumen fraction R (t), amplitude maximum R (t) is foundmaxWith minimum value R
(t)min, R (t)max=4600707, R (t)min=4426747.Computation vision flashes percentage VFP=3.85%, calculation formula
See formula (15)
Step 5, LED filament lamp stroboscopic situation is judged according to flicker frequency f and visual flicker percentage VFP:
Because of f=192.31 < 400Hz, and VFP=3.85% > 1%, therefore the iodine-tungsten lamp has stroboscopic, exports the iodine-tungsten lamp
Flicker frequency f=192.31, visual flicker percentage VFP=3.85%.Analysis terminates.
The present invention is not limited to the above embodiments, on the basis of technical solution disclosed by the invention, the skill of this field
For art personnel according to disclosed technology contents, one can be made to some of which technical characteristic by not needing creative labor
A little replacements and deformation, these replacements and deformation are within the scope of the invention.
Claims (6)
1. a kind of electric light source stroboscopic analysis method based on spectrum analysis, which is characterized in that include the following steps:
Step 1, tested lamps and lanterns are selected, spatial distribution P (λ) data are acquired；
Step 2, spectroflash ratio SFP is calculated, by spectroflash ratio SFP compared with spectrometer Signal to Noise Ratio (SNR), and tentatively judgement is
No to have stroboscopic, if SFP≤3 × SNR, lamps and lanterns are without stroboscopic；Analysis terminates；If SFP 3 × SNR of >, continues to analyze；
Step 3, it calculates and is no less than the corresponding lumen fraction R (t) of 50 groups of spatial distribution P (λ):
By OriginPro software, the photopic vision spectral luminous efficiency that International Commission on Illumination is provided using Asym2Sig function
Function V (λ) is fitted；Using Excel software, according to photopic vision spectral luminous efficiency function V (λ) fitting expression, calculate with
The functional value of spatial distribution P (λ) same scan step-length, and calculate and be no less than 50 groups of P (λ) × V (λ)；Utilize OriginPro software
Integrate function, calculate be no less than 50 lumen fraction R (t)；
Step 4, it is fitted the function expression of lumen fraction R (t), and calculates flicker frequency f and visual flicker percentage VFP；
Step 5, lamps and lanterns stroboscopic situation is judged according to flicker frequency f and visual flicker percentage VFP:
If f >=400Hz or VFP≤1%, lamps and lanterns terminate without stroboscopic, analysis；
If f < 400Hz or VFP > 1%, lamps and lanterns have stroboscopic, output lamps and lanterns flicker frequency f and visual flicker percentage
VFP, analysis terminate.
2. the electric light source stroboscopic analysis method according to claim 1 based on spectrum analysis, which is characterized in that the step
1) in, spatial distribution P (λ) data is acquired, are obtained by following step:
1a) selection needs the lamps and lanterns analyzed, its normal work is made under 220V, 50Hz alternating current；
High frequency light spectrometer 1b) is utilized in darkroom, the time of integration is not more than 1ms, acquires tested lamps and lanterns and is no less than 380- in 50ms
780nm visible light wave range spatial distribution P (λ) data obtain no less than 50 groups of spatial distribution P (λ) data.
3. the electric light source stroboscopic analysis method according to claim 1 based on spectrum analysis, which is characterized in that the step
2) it in, calculates spectroflash ratio SFP and is obtained by following step:
No less than 50 groups of spatial distribution P (λ) 2a) are drawn in a width figure using OriginPro, Matlab and Excel software；
2b) find the peak-peak P (λ) in no less than 50 groups of spatial distribution P (λ)max, and no less than 50 groups of spatial distribution P
Minimum peak P (λ) in (λ)min；
The spectroflash ratio SFP of the lamps and lanterns 2c) is calculated using formula (1)
4. the electric light source stroboscopic analysis method according to claim 1 based on spectrum analysis, which is characterized in that the step
3) in, fitting function such as following formula:
Independent variable X corresponds to the wavelength X in photopic vision spectral luminous efficiency function V (λ) in formula, and dependent variable y corresponds to photopic vision light
It composes luminous efficiency function V (λ), y0、A、Xc、W1、W2、W3For coefficient to be determined.
5. the electric light source stroboscopic analysis method according to claim 1 based on spectrum analysis, which is characterized in that the step
3) in, function expression such as following formula:
6. the electric light source stroboscopic analysis method according to claim 1 based on spectrum analysis, which is characterized in that the step
4) it carries out according to the following procedure:
4a) using the tool box cftool in Matlab software, using the letter of 8 rank Fourier spaces fitting lumen fraction R (t)
Number expression formula, fitting formula are shown in formula (4)
In formula, x is that the wavelength t, Y that independent variable corresponds to lumen fraction R (t) are that dependent variable corresponds to lumen fraction R (t),
a0、ai, b, w be coefficient to be determined；
4b) according to the function expression of lumen fraction R (t), drawn using OriginPro software, by cycle of oscillation to it is corresponding when
Between t1With t2, calculate flicker frequency f=1/ (t2-t1)；
4c) by the functional image of lumen fraction R (t), the maximum value R (t) of lumen fraction R (t) is foundmaxWith minimum value R
(t)min, computation vision flashes percentage VFP, and calculation formula is shown in formula (5):
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| CN114845060B (en) * | 2021-02-02 | 2024-05-10 | 光宝科技新加坡私人有限公司 | System and method for detecting flicker frequency and electronic device comprising same |
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