CN102858073A - Measuring method and measuring device of output light parameters of lighting device and lighting system - Google Patents
Measuring method and measuring device of output light parameters of lighting device and lighting system Download PDFInfo
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Abstract
The invention provides a method, a device and a system for measuring output light parameters of a lighting system. The method includes obtaining all single color electric signals in mixed light output by the lighting system, respectively conducting demodulation processing according to each single color electric signals to obtain all single color signal sequences corresponding to all lamps, conducting average calculation respectively according to each single color signal sequence to obtain signal sequence average corresponding to each single color signal sequence and conducting light parameter calculation according to the signal sequence average to obtain output light parameter of each lamp. The lighting system comprises one or a plurality of lamps, and the output light parameters comprise light quantity parameters, color coordinate parameters and color temperature parameters. The method, the device and the system achieve the effect that output light parameters of a single lamp can be utilized to accurately control the working state of the lighting system.
Description
Technical field
The present invention relates to the lighting apparatus field, in particular to a kind of method of measurement, device and illuminator of lighting device output optical parameter.
Background technology
Existing illuminator is comprised of a plurality of led chips or a plurality of LED lamp usually, and the light that these light sources send is mixed together in the space, is very difficult to the measurement of single led chip or single led lamp output optical parameter.Usually adopt two kinds of methods to solve this problem in the prior art.First method is to adopt photosensor array to carry out multimetering, and estimates the luminous flux of each led light source with the mapping relations between the photosensor array according to the led light source array.But, this method requires the quantity of optical sensor to equate with the quantity of led light source at least, but photosensor array is installed outside led light source very large difficulty is arranged.Second method adds it based on the principle of visible light communication with the flag information of each led light source and drives in signal.Like this, receiving terminal only needs the flag information of each led light source of extraction from the mixed light signal of output to come each led light source is distinguished.This method only needs one or much smaller than the optical sensor of led light source quantity, but need to carry out CDMA to the driving signal of each led light source with communication software, TDMA, or the demodulation of FDMA, comprise the LED light signal that modulation (LED end) or demodulation (receiving terminal) are received, because modulation and demodulation needs the algorithm of more complicated, the signal of each light source is processed, arithmetic speed and the memory space of processor there is higher requirement.Take the FDMA(frequency division multiple access) be example, the designated different base frequency of the driving signal of two led light sources---be f1, f2, as shown in Figure 1, with these two known frequencies the mixed light signal is carried out filtering at receiving terminal and can estimate respectively their luminous intensity amplitude, such as A1, A2.
Luminous flux can only be described light intensity (being brightness), can not describe the color of light.Yet, even if in the constant situation of light intensity, if the color of light changes, can think that equally illuminator lost efficacy.Above-mentioned two kinds of methods all can only be extracted the luminous flux of single led light source from the light signal that a plurality of led light sources mix, can't measure the output optical color parameter of illuminator.For addressing this problem, there are two kinds of methods can measure the chromaticity coordinates of light in the prior art, the first is used CDMA technology and is distinguished that the monochromatic LED lamp of a plurality of different colours is at the output light intensity of certain impact point, and calculate the chromaticity coordinates of measured target point place mixed lights with these monochromatic intensity, but this method can not be distinguished the chromaticity coordinates of certain LED lamp output light from mixed light; Second method adopts tristimulus colour examining transducer to measure the illuminant color coordinate.Tristimulus colour examining transducer is comprised of three groups of photodiodes and high sensitive filter usually, the XYZ tristimulus values of transducer output RGB or CIE.Fig. 2 shows the structural representation of prior art color measuring device, and particularly, color measuring device is tristimulus colour examining transducer, and wherein, 12,14,16 is filter, and 18,20,22 is optical sensor.Yet, the chromaticity coordinates 24,26, the 28th of tristimulus colour examining transducer output, the chromaticity coordinates of mixed light, and can not distinguish the chromaticity coordinates of Different Light in the mixed light, the operating state of illuminator can not be accurately reflected according to the optical color parameter of mixed light, thereby the work of illuminator can not be accurately controlled.
To sum up, in the prior art or can only distinguish the intensity of Different Light in the mixed light signal, can only survey the chromaticity coordinates of mixed light, and can not distinguish Different Light at the chromaticity coordinates of certain impact point, Different Light also never was suggested the chromaticity coordinates of certain impact point and the technology of colour temperature in can automatic distinguishing mixed light signal, according to these parameters of the mixed light of illuminator output, can not detect accurately and control illuminator.
For in the prior art because according to the parameter of illuminator output mixed light illuminator being monitored, and the problem that can not accurately monitor and control the illuminator operating state of bringing not yet proposes effective solution at present.
Summary of the invention
Illuminator is monitored because of the parameter of exporting mixed light according to illuminator for correlation technique, and the problem that can not accurately monitor and control the illuminator operating state of bringing, effective solution is not yet proposed at present, for this reason, main purpose of the present invention is to provide a kind of method of measurement, device and illuminator of illuminator output optical parameter, to address the above problem.
To achieve these goals, according to an aspect of the present invention, provide a kind of method of measurement of illuminator output optical parameter, the method comprises: obtain all the monochromatic signals of telecommunication in the illuminator output mixed light, wherein, illuminator comprises one or more light fixtures; Carry out respectively demodulation process according to each monochromatic signal of telecommunication, to obtain and corresponding all the monochrome signal sequences of each light fixture; According to the respectively value of the averaging calculating of each monochrome signal sequence, to obtain the burst average corresponding with each monochrome signal sequence; Carry out optical parameter according to the burst average and calculate, to obtain the output optical parameter of each light fixture, wherein, the output optical parameter comprises luminous flux parameter, chromaticity coordinates parameter and color temperature parameters.
Further, the step of obtaining all monochromatic signals of telecommunication of illuminator output mixed light comprises: the mixed light that obtains illuminator output; According to the mixed light processing that filters, to obtain all the monochromatic light signals in the mixed light; Carry out respectively signal of telecommunication conversion according to each monochromatic light signal, to obtain the monochromatic signal of telecommunication.
Further, carrying out optical parameter according to the burst average calculates, step with the output optical parameter of obtaining each light fixture comprises: according to the calculating of multiplying each other of burst average and the first calibration coefficient, with the chromaticity coordinates parameter in the output optical parameter of obtaining each light fixture.
Further, in the calculating of multiplying each other according to burst average and the first calibration coefficient, after the chromaticity coordinates parameter of obtaining each light fixture, method also comprises: carry out Coordinate Conversion according to the chromaticity coordinates parameter, to obtain the xyz coordinate; Carry out colour temperature according to the xyz coordinate and calculate, with the color temperature parameters in the output optical parameter of obtaining each light fixture.
Further, carrying out optical parameter according to the burst average calculates, step with the output optical parameter of obtaining each light fixture comprises: according to the calculating of multiplying each other of burst average and the second calibration coefficient, with the luminous flux parameter in the output optical parameter of obtaining each light fixture.
Further, carry out respectively mean value computation according to each monochrome signal sequence, comprise with the step of obtaining the burst average corresponding with each monochrome signal sequence: carry out respectively Amplitude Estimation according to each monochrome signal sequence and calculate, to obtain the amplitude of each monochrome signal sequence; Input signal according to amplitude and illuminator calculates according to first formula value of averaging, and to obtain each monochrome signal serial mean, wherein, the first formula is: the duty ratio of average=amplitude * input signal.
To achieve these goals, according to an aspect of the present invention, provide a kind of measurement mechanism of illuminator output optical parameter, this device comprises: deriving means, be used for obtaining all monochromatic signals of telecommunication of illuminator output mixed light, wherein, illuminator comprises one or more light fixtures; Signal receiving device is connected with the first deriving means, is used for carrying out respectively demodulation process according to each monochromatic signal of telecommunication, to obtain and corresponding all the monochrome signal sequences of each light fixture; Signal processing apparatus is connected with signal receiving device, is used for according to the respectively value of the averaging calculating of each monochrome signal sequence, to obtain the burst average corresponding with each monochrome signal sequence; Calculation element is connected with signal processing apparatus, is used for carrying out optical parameter according to the burst average and calculates, and to obtain the output optical parameter of each light fixture, wherein, the output optical parameter comprises luminous flux parameter, chromaticity coordinates parameter and color temperature parameters.
Further, deriving means comprises: filtering apparatus, be used for obtaining the mixed light of illuminator output, and according to the mixed light processing that filters, to obtain all the monochromatic light signals in the mixed light; Optical sensor is connected with filtering apparatus, is used for carrying out respectively signal of telecommunication conversion according to each monochromatic light signal, to obtain the monochromatic signal of telecommunication.
Further, calculation element comprises: the first calculator, be connected with signal processing apparatus, and be used for according to the calculating of multiplying each other of burst average and the first calibration coefficient, with the chromaticity coordinates parameter in the output optical parameter of obtaining each light fixture.
Further, calculation element also comprises: the first transducer, be connected with the first calculator, and be used for carrying out Coordinate Conversion according to the chromaticity coordinates parameter, to obtain the xyz coordinate; The second calculator is connected with the first transducer, is used for carrying out colour temperature according to the xyz coordinate and calculates, with the color temperature parameters in the output optical parameter of obtaining each light fixture.
Further, calculation element also comprises: the 3rd calculator, be connected with signal processing apparatus, and be used for according to the calculating of multiplying each other of burst average and the second calibration coefficient, with the luminous flux parameter in the output optical parameter of obtaining each light fixture.
Further, signal processing apparatus comprises: the 4th calculator, be connected with signal receiving device, and be used for carrying out respectively Amplitude Estimation according to each monochrome signal sequence and calculate, to obtain the amplitude of each monochrome signal sequence; The 5th calculator is connected with the 4th calculator, is used for calculating according to first formula value of averaging according to the input signal of amplitude and illuminator, and to obtain each monochrome signal serial mean, wherein, the first formula is: the duty ratio of average=amplitude * input signal.
To achieve these goals, according to an aspect of the present invention, provide a kind of measuring system of illuminator output optical parameter, this system comprises: the measurement mechanism of illuminator output optical parameter.
By illuminator method of measurement of the present invention, device and illuminator, the output optical signal of single light fixture and the method that this signal is processed are extracted in employing from the mixed light of illuminator output, get access to the output optical parameter of single light fixture, because the output optical parameter of single light fixture can accurately reflect the operating state of illuminator, thereby can control the light intensity of illuminator according to the output light flux parameter of each light fixture, accurately control the color output of illuminator by chromaticity coordinates parameter and color temperature parameters, each light fixture color change in the colour temperature of white light and the illuminator, solved in the prior art because according to the parameter of illuminator output mixed light illuminator being monitored, and the problem that can not accurately monitor and control the illuminator operating state of bringing has realized accurately controlling by the output optical parameter of single light fixture the effect of illuminator operating state.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the application's prior art modulation signal;
Fig. 2 is the structural representation according to the application's color measuring device;
Fig. 3 is the structural representation according to the measurement mechanism of the illuminator output optical parameter of the embodiment of the invention;
Fig. 4 is the detailed construction schematic diagram according to measurement mechanism embodiment illustrated in fig. 3;
Fig. 5 is the flow chart according to the method for measurement of the illuminator output optical parameter of the embodiment of the invention;
Fig. 6 is the structural representation according to the illuminator of the embodiment of the invention; And
Fig. 7 is the driving signal schematic representation according to illuminator embodiment illustrated in fig. 6.
Embodiment
Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Fig. 3 is the structural representation according to the measurement mechanism of the illuminator output optical parameter of the embodiment of the invention.Fig. 4 is the detailed construction schematic diagram according to measurement mechanism embodiment illustrated in fig. 3.
As shown in Figure 3 and Figure 4, this device comprises: deriving means 10, be used for obtaining all monochromatic signals of telecommunication that illuminator is exported mixed light, and wherein, illuminator comprises one or more light fixtures; Signal receiving device 30 is connected with the first deriving means 10, is used for carrying out respectively demodulation process according to each monochromatic signal of telecommunication, to obtain and corresponding all the monochrome signal sequences of each light fixture; Signal processing apparatus 50 is connected with signal receiving device 30, is used for according to the respectively value of the averaging calculating of each monochrome signal sequence, to obtain the burst average corresponding with each monochrome signal sequence; Calculation element 70 is used for carrying out optical parameter according to the burst average and calculates, and to obtain the output optical parameter of each light fixture, wherein, the output optical parameter comprises luminous flux parameter, chromaticity coordinates parameter and color temperature parameters.
Adopt the measurement mechanism of illuminator output optical parameter of the present invention, obtain all the monochromatic signals of telecommunication in the mixed light of illuminator output by deriving means, then signal receiving device carries out demodulation process to this signal of telecommunication, to obtain all monochrome signal sequences corresponding with each light fixture, signal processor is to the calculating of above-mentioned monochrome signal sequence value of averaging, after getting access to the burst average corresponding with each monochrome signal sequence, calculation element carries out optical parameter according to the burst average and calculates, and gets access to the light output parameter of each light fixture.Export the measurement mechanism of optical parameter by the illuminator that adopts the application, from the mixed light of illuminator output, extract the output optical signal of single light fixture, and this signal processed, get access to the output optical parameter of single light fixture, the output optical parameter of single light fixture can accurately reflect the operating state of illuminator, thereby can control the light intensity of illuminator according to the output light flux parameter of each light fixture, accurately control the color output of illuminator by chromaticity coordinates parameter and color temperature parameters, each light fixture color change in the colour temperature of white light and the illuminator, solved in the prior art because according to the parameter of illuminator output mixed light illuminator being monitored, and the problem that can not accurately monitor and control the illuminator operating state of bringing has realized accurately controlling by the output optical parameter of single light fixture the effect of illuminator operating state.
Wherein, illuminator can comprise n light fixture, light fixture can be led chip or LED lamp, the LED lamp can comprise monochromatic LED chip or multi-colored led chip, thus, light fixture can be the white light that is fixed in certain reference color temperature, also can be the adjustable lampion of color, and the light that these light sources send mixes the mixed light that becomes illuminator output in the space; The monochromatic signal of telecommunication can be R, G, three monochromatic signals of telecommunication of B, also can be X, the Y of CIE, the signal of telecommunication of three coordinates of Z.
Particularly, according to Fig. 4 as can be known the application's measurement mechanism can comprise one or more deriving means 10 and signal receiving device 30 and signal processing apparatus 50.When deriving means 10 obtains all monochromatic signals of telecommunication in the mixed light and is R, G, three monochromatic signals of telecommunication of B, signal receiving device 30 carries out demodulation process to three monochromatic signals of telecommunication respectively, obtain with each light fixture to three corresponding monochrome signal sequences, then signal processing apparatus 50 calculates three monochrome signal sequence values of averaging of each light fixture respectively, to obtain the average of three monochrome signal sequences of each light fixture, calculation element 70 is according to the output optical parameter of this each light fixture of mean value computation afterwards; When deriving means 10 obtained the signal of telecommunication of X, Y that all monochromatic signals of telecommunication in the mixed light are CIE, three coordinates of Z, the processing procedure the when processing procedure of signal processing apparatus 50 and the calculation element 70 monochromatic signals of telecommunication is R, G, three monochromatic signals of telecommunication of B with the monochromatic signal of telecommunication was consistent.By signal receiving device 30 the monochromatic signal of telecommunication in the illuminator output mixed light that gets access to is carried out demodulation process, get access to the burst of single light fixture, and then burst processed the output optical parameter of obtaining single light fixture, can obtain the output intensity of each light fixture, the state of photochromic coloured silk according to the output optical parameter of each light fixture, thereby accurately know the operating state of illuminator, so that the user can control illuminator according to these parameters.
Particularly, as shown in Figure 4, in the application's testing apparatus, 30 pairs of monochromatic signals of telecommunication of signal receiving device carry out demodulation process, therefrom extract the monochrome signal sequence corresponding to single led light fixture, demodulation method is determined by the driving signal of illuminator, such as when using the TDMA technology, signal receiving device 30 can read monochrome signal sequence corresponding to certain single lamp according to prior official hour sheet, wherein, timeslice is a time interval, in the interval of some timeslices, only have a LED lamp luminescence, therefore at this moment between in the section, light signal is single, but not stack.
In above-described embodiment of the application, deriving means 10 can comprise: filtering apparatus, be used for obtaining the mixed light of lighting device output, and according to the mixed light processing that filters, to obtain all the monochromatic light signals in the mixed light; Optical sensor is connected with filtering apparatus, is used for carrying out respectively signal of telecommunication conversion according to each monochromatic light signal, to obtain the monochromatic signal of telecommunication.Wherein, deriving means 10 can be realized by the tristimulus color measuring device, each tristimulus color measuring device can comprise three colour examining passages, every the colour examining passage comprises respectively a filtering apparatus and an optical sensor, and filtering apparatus can be filter, and filter can be only responsive to a kind of color among the RGB, also can be only to the some sensitivities in the XYZ coordinate of CIE, mixed light is by filtering apparatus like this, output be a monochromatic light signal, such as being R light signal or G light signal or B light signal; Optical sensor can be photodiode, also can be phototriode.
Particularly, Fig. 4 shows the process of a tristimulus colour examining passage and the processing of this channel signal, in Fig. 4, optical sensor is photodiode, optical sensor is converted to the signal of telecommunication with the monochromatic light signal of the mixed light by filtering apparatus, and this signal of telecommunication is voltage or the current signal that is directly proportional with the intensity of this monochromatic light signal.Wherein, the signal of telecommunication is generally the current signal that is directly proportional with the luminous flux (being light intensity) of monochromatic light signal of the mixed light that receives on the optical sensor photosurface, and this current signal can be converted to the voltage signal that is directly proportional with current signal by outer meeting resistance.
Above-described embodiment according to the application, signal processing apparatus 50 can comprise: the first calculator, be connected with signal processing apparatus 50, be used for according to the calculating of multiplying each other of burst average and the first calibration coefficient, with the chromaticity coordinates parameter in the output optical parameter of obtaining each light fixture.
Particularly, the first calculator is processed each the monochrome signal sequence that obtains according to signal processing apparatus 50 average is carried out multiplication with the first calibration coefficient and is calculated, and obtains the chromaticity coordinates parameters of different monochromes in the output optical parameter of respectively corresponding each light fixture.Wherein, the first calibration coefficient can obtain from the technical data of optical sensor, also can draw by experiment, can also estimate by debugging, calibration stage after lamp installation.
In above-described embodiment of the application, calculation element 70 can also comprise: the first transducer, be connected with the first calculator, and be used for carrying out Coordinate Conversion according to the chromaticity coordinates parameter, to obtain the xyz coordinate; The second calculator is connected with the first transducer, is used for carrying out colour temperature according to the xyz coordinate and calculates, with the color temperature parameters in the output optical parameter of obtaining each light fixture.Wherein, the normalized form and the parameter that provide according to CIE, as follows counting colour temperature:
(1) converts RGB or XYZ coordinate to the xyz coordinate;
(2) with (x
e, y
e) central point of expression (x, y) coordinate, and according to (x
e, y
e) calculating backslash rate n=(x-x
e)/(y-y
e);
(3) at (x, y) coordinate near central point (x
e=0.3356, y
e=0.1691) or reference color temperature at 3000K-50, in the situation between the 000K, with following formula counting colour temperature (representing with CCT):
CCT(x,y)=A
0+A
1exp(-n/t
1)+A
2exp(-n/t
2)+A
3exp(-n/t
3)，
The parameter here is A
0=-949.86315, A
1=6253.80338, A
2=28.70599, A
3=0.00004, t
1=0.92159, t
2=0.20039, t
3=0.07125.
(4) at (x, y) coordinate near central point (x
e=0.3356, y
e=0.1691), or reference color temperature in the situation of 000K, is used the following formula counting colour temperature at 50000-800:
CCT(x,y)=449n
3+3525n
2-6823.3n+5520.33。
Particularly, the first transducer is changed according to the chromaticity coordinates parameter that the first calculator calculates, be converted into the xyz coordinate, then the second calculator carries out colour temperature calculating according to the xyz coordinate, get access to the color temperature parameters in each light fixture output optical parameter, above-mentioned the first transducer and the second calculator can be arranged in as shown in Figure 4 the colour temperature calculation element.
In above-described embodiment of the application, if the filtering apparatus that uses is respectively to a kind of sensitivity among the RGB, the formula that provides according to the CIE1931 standard so can calculate the XYZ coordinate of CIE, then the xyz coordinate of CIE can be derived again from the XYZ coordinate of CIE, and then the color temperature parameters of single led lamp can be drawn according to the xyz coordinate Calculation according to known formula; If the filtering apparatus that uses is responsive to the some coordinates in the XYZ coordinate of CIE respectively, then XYZ coordinate can be converted to the xyz coordinate, then calculate the colour temperature of single led lamp.
Above-described embodiment according to the application, calculation element 70 can also comprise: the 3rd calculator, be connected with signal processing apparatus 50, be used for according to the calculating of multiplying each other of burst average and the second calibration coefficient, with the luminous flux parameter in the output optical parameter of obtaining each light fixture.
Particularly, because the luminous flux that receives on the optical sensor photosurface also is directly proportional with the total light flux that LED sends, average and the second calibration coefficient that the application processes the monochrome signal sequence that obtains by the 3rd calculator according to signal processing apparatus 50 carry out multiplication calculating, obtain the luminous flux parameter in each light fixture output optical parameter.Wherein, the first calibration coefficient can obtain from the technical data of optical sensor, also can draw by experiment, can also estimate by debugging, calibration stage after lamp installation.
In above-described embodiment of the application, signal processing apparatus 50 can comprise: the 4th calculator, be connected with signal receiving device 30, and be used for carrying out respectively Amplitude Estimation according to each monochrome signal sequence and calculate, to obtain the amplitude of each monochrome signal sequence; The 5th calculator is connected with the 4th calculator, is used for calculating according to first formula value of averaging according to the input signal of amplitude and lighting device, and to obtain each monochrome signal serial mean, wherein, the first formula is: the duty ratio of average=amplitude * input signal.
Particularly, the 4th calculator carries out respectively Amplitude Estimation according to each monochrome signal sequence and calculates, and estimates the amplitude of each monochrome signal sequence, and then the 5th calculator calculates the average of this monochrome signal sequence according to the duty ratio of the driving signal of illuminator.Wherein, Amplitude Estimation can adopt any signal amplitude commonly used to estimate or the envelope algorithm for estimating, take the demodulation of FDMA(frequency division) as example, above-mentioned Amplitude Estimation can realize by the following method:
(1) the mixed light signal that transducer is recorded carries out bandpass filtering: suppose that illuminator comprises a plurality of LED lamps, the base frequency of i led light source is f
i, the filter that is used for this LED light signal of filtration is g
i(t)=2g (t) cos (2 π f
iT), wherein g (t) is a rectangular window function that length is T sampling period;
(2) estimation can be carried out according to following formula the processing of Amplitude Estimation through the envelope of the light signal (representing with s) of i LED of filtering:
Fig. 5 is the flow chart according to the method for measurement of the illuminator output optical parameter of the embodiment of the invention.As shown in Figure 5, the method comprises the steps:
Step S102 obtains all monochromatic signals of telecommunication that illuminator is exported mixed light, and wherein, illuminator comprises one or more light fixtures.
Wherein, illuminator can comprise n light fixture, light fixture can be led chip or LED lamp, the LED lamp can comprise monochromatic LED chip or multi-colored led chip, thus, light fixture can be the white light that is fixed in certain reference color temperature, also can be the adjustable lampion of color, and the light that these light sources send mixes the mixed light that becomes illuminator output in the space.And as shown in Figure 4, the monochromatic signal of telecommunication of the mixed light that deriving means 10 gets access to can be R, G, three monochromatic signals of telecommunication of B, also can be x, the y of CIE, the signal of telecommunication of three coordinates of z.
Step S104 carries out respectively demodulation process according to each monochromatic signal of telecommunication, to obtain and corresponding all the monochrome signal sequences of each light fixture.
Step S106 is according to the respectively value of the averaging calculating of each monochrome signal sequence, to obtain the burst average corresponding with each monochrome signal sequence.
Step S108 carries out optical parameter according to the burst average and calculates, and to obtain the output optical parameter of each light fixture, wherein, the output optical parameter comprises luminous flux parameter, chromaticity coordinates parameter and color temperature parameters.
Adopt the method for measurement of illuminator output optical parameter of the present invention, by all the monochromatic signals of telecommunication in the mixed light that obtains illuminator output, then this signal of telecommunication is carried out demodulation process, to obtain all monochrome signal sequences corresponding with each light fixture, and according to the calculating of above-mentioned monochrome signal sequence value of averaging, after getting access to the burst average corresponding with each monochrome signal sequence, carry out optical parameter according to the burst average and calculate, get access to the light output parameter of each light fixture.Export the method for measurement of optical parameter by the illuminator that adopts the application, from the mixed light of illuminator output, extract the light signal of single light fixture, and this signal processed, get access to the output optical parameter of single light fixture, the output optical parameter of single light fixture can accurately reflect the operating state of illuminator, thereby can control the light intensity of illuminator according to the output light flux parameter of each light fixture, accurately control the color output of illuminator by chromaticity coordinates parameter and color temperature parameters, each light fixture color change in the colour temperature of white light and the illuminator, solved in the prior art because according to the parameter of illuminator output mixed light illuminator being monitored, and the problem that can not accurately monitor and control the illuminator operating state of bringing has realized accurately controlling by the output optical parameter of single light fixture the effect of illuminator operating state.
Particularly, step S104 and step S106 can realize by the following method: all monochromatic signals of telecommunication that obtain in the mixed light when deriving means 10 are R, G, during three monochromatic signals of telecommunication of B, signal receiving device 30 carries out demodulation process to three monochromatic signals of telecommunication respectively, obtain with each light fixture to three corresponding monochrome signal sequences, then signal processing apparatus 50 calculates three monochrome signal sequence values of averaging of each light fixture respectively, to obtain the average of three monochrome signal sequences of each light fixture, calculation element 70 is according to the output optical parameter of this each light fixture of mean value computation afterwards; When deriving means 10 obtained all monochromatic signals of telecommunication in the mixed light and is the signal of telecommunication of three coordinates of XYZ of CIE, the processing procedure the when processing procedure of signal processing apparatus 50 and the calculation element 70 monochromatic signals of telecommunication is R, G, three monochromatic signals of telecommunication of B with the monochromatic signal of telecommunication was consistent.By signal receiving device 30 the monochromatic signal of telecommunication in the illuminator output mixed light that gets access to is carried out demodulation process, get access to the burst of single light fixture, and then burst processed the output optical parameter of obtaining single light fixture, can obtain the output intensity of each light fixture, the state of photochromic coloured silk according to the output optical parameter of each light fixture, thereby accurately know the operating state of illuminator, so that the user can control illuminator according to these parameters.
Particularly, as shown in Figure 4, in the application's method of testing, 30 pairs of monochromatic signals of telecommunication of signal receiving device carry out demodulation process, therefrom extract the monochrome signal sequence corresponding to single led light fixture, demodulation method is determined by the driving signal of illuminator, such as when using the TDMA technology, signal receiving device 30 can read monochrome signal sequence corresponding to certain single lamp according to prior official hour sheet, wherein, timeslice is a time interval, in the interval of some timeslices, only have a LED lamp luminescence, therefore at this moment between in the section, light signal is single, but not stack.
In above-described embodiment of the application, the step of obtaining all monochromatic signals of telecommunication of illuminator output mixed light comprises: the mixed light that obtains illuminator output; According to the mixed light processing that filters, to obtain all the monochromatic light signals in the mixed light; Carry out respectively signal of telecommunication conversion according to each monochromatic light signal, to obtain the monochromatic signal of telecommunication.
Particularly, at first deriving means 10 can get access to respectively three monochromatic light coordinates of the output mixed light of illuminator by three colour examining passages of tristimulus color measuring device.These three monochromatic coordinates can be three monochromatic light coordinates of RGB, also can be three monochromatic light coordinates of the XYZ of CIE, then by optical sensor light signal are converted to the signal of telecommunication.As shown in Figure 6, optical sensor is converted to the signal of telecommunication with the monochromatic light signal of the mixed light by filtering apparatus, and this signal of telecommunication is voltage or the current signal that is directly proportional with the intensity of this monochromatic light signal.Wherein, the signal of telecommunication is generally the current signal that is directly proportional with the luminous flux (being light intensity) of monochromatic light signal of the mixed light that receives on the optical sensor photosurface, and this current signal can be converted to the voltage signal that is directly proportional with current signal by outer meeting resistance.
In above-described embodiment of the application, carrying out optical parameter according to the burst average calculates, step with the output optical parameter of obtaining each light fixture comprises: according to the calculating of multiplying each other of burst average and the first calibration coefficient, with the chromaticity coordinates parameter in the output optical parameter of obtaining each light fixture.
Particularly, the average of each the monochrome signal sequence that obtains according to processing and the first calibration coefficient carry out multiplication and calculate, and obtain different monochromatic chromaticity coordinates parameters in the output optical parameter of respectively corresponding each light fixture.Wherein, the first calibration coefficient can obtain from the technical data of optical sensor, also can draw by experiment, can also estimate by debugging, calibration stage after lamp installation.
In above-described embodiment of the application, in the calculating of multiplying each other according to burst average and the first calibration coefficient, after the chromaticity coordinates parameter of obtaining each light fixture, method can also comprise: carry out Coordinate Conversion according to the chromaticity coordinates parameter, to obtain the xyz coordinate; Carry out colour temperature according to the xyz coordinate and calculate, with the color temperature parameters in the output optical parameter of obtaining each light fixture.Wherein, the normalized form and the parameter that provide according to CIE, as follows counting colour temperature:
(1) converts RGB or XYZ coordinate to the xyz coordinate;
(2) with (x
e, y
e) central point of expression (x, y) coordinate, and according to (x
e, y
e) calculating backslash rate n=(x-x
e)/(y-y
e);
(3) at (x, y) coordinate near central point (x
e=0.3356, y
e=0.1691) or reference color temperature at 3000K-50, in the situation between the 000K, with following formula counting colour temperature (representing with CCT):
CCT(x,y)=A
0+A
1exp(-n/t
1)+A
2exp(-n/t
2)+A
3exp(-n/t
3)，
The parameter here is A
0=-949.86315, A
1=6253.80338, A
2=28.70599, A
3=0.00004, t
1=0.92159, t
2=0.20039, t
3=0.07125.
(4) at (x, y) coordinate near central point (x
e=0.3356, y
e=0.1691), or reference color temperature in the situation of 000K, is used the following formula counting colour temperature at 50000-800:
CCT(x,y)=449n
3+3525n
2-6823.3n+5520.33。
Particularly, in the calculating of multiplying each other according to burst average and the first calibration coefficient, after the chromaticity coordinates parameter of obtaining each light fixture, with chromaticity coordinates parameter conversion xyz coordinate, then carrying out colour temperature according to the xyz coordinate calculates, get access to the color temperature parameters in each light fixture output optical parameter, if the filtering apparatus that uses is respectively to a kind of sensitivity among the RGB, the formula that provides according to the CIE1931 standard so can calculate the XYZ coordinate of CIE, then the xyz coordinate of CIE can be derived again from the XYZ coordinate of CIE, and then the color temperature parameters of single led lamp can be drawn according to the xyz coordinate Calculation according to known formula; If the filtering apparatus that uses is responsive to the some coordinates in the XYZ coordinate of CIE respectively, then XYZ coordinate can be converted to the xyz coordinate, and then calculates the colour temperature of single led lamp.
In above-described embodiment of the application, wherein, carrying out optical parameter according to the burst average calculates, step with the output optical parameter of obtaining each light fixture comprises: according to the calculating of multiplying each other of burst average and the second calibration coefficient, with the luminous flux parameter in the output optical parameter of obtaining each light fixture.
Particularly, because the luminous flux that receives on the optical sensor photosurface also is directly proportional with the total light flux that LED sends, the method of present embodiment calculates the luminous flux of LED lamp by the following method: average and the second calibration coefficient of processing the monochrome signal sequence that obtains according to signal processing apparatus 50 carry out multiplication calculating, obtain the luminous flux parameter in each light fixture output optical parameter.Wherein, the first calibration coefficient can obtain from the technical data of optical sensor, also can draw by experiment, can also estimate by debugging, calibration stage after lamp installation.
In above-described embodiment of the application, carry out respectively mean value computation according to each monochrome signal sequence, comprise with the step of obtaining the burst average corresponding with each monochrome signal sequence: carry out respectively Amplitude Estimation according to each monochrome signal sequence and calculate, to obtain the amplitude of each monochrome signal sequence; Input signal according to amplitude and illuminator calculates according to first formula value of averaging, and to obtain each monochrome signal serial mean, wherein, the first formula is: the duty ratio of average=amplitude * input signal.
Particularly, carry out respectively Amplitude Estimation according to each monochrome signal sequence and calculate, estimate the amplitude of each monochrome signal sequence, then calculate the average of this monochrome signal sequence according to the duty ratio of the driving signal of illuminator.Wherein, Amplitude Estimation can adopt any signal amplitude commonly used to estimate or the envelope algorithm for estimating, take the demodulation of FDMA(frequency division) as example, above-mentioned Amplitude Estimation can realize by the following method:
(1) the mixed light signal that transducer is recorded carries out bandpass filtering: suppose that illuminator comprises a plurality of LED lamps, the base frequency of i led light source is f
i, the filter that is used for this LED light signal of filtration is g
i(t)=2g (t) cos (2 π f
iT), wherein g (t) is a rectangular window function that length is T sampling period;
(2) estimation can be carried out according to following formula the processing of Amplitude Estimation through the envelope of the light signal (representing with s) of i LED of filtering:
Need to prove, can in the computer system such as one group of computer executable instructions, carry out in the step shown in the flow chart of accompanying drawing, and, although there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
Fig. 6 is the structural representation according to the illuminator of the embodiment of the invention.Fig. 7 is the driving signal schematic representation according to illuminator embodiment illustrated in fig. 6.
As shown in Figure 6 and Figure 7, this illuminator can comprise one or more light fixtures, can also comprise: the measurement mechanism of illuminator output optical parameter.
Adopt illuminator of the present invention, measurement mechanism by illuminator output optical parameter, obtain the output optical parameter of extracting single light fixture in the mixed light of illuminator output, thereby can control the light intensity of illuminator according to the output light flux parameter of each light fixture, accurately control the color output of illuminator by chromaticity coordinates parameter and color temperature parameters, each light fixture color change in the colour temperature of white light and the illuminator, solved in the prior art because according to the parameter of illuminator output mixed light illuminator being monitored, and the problem that can not accurately monitor and control the illuminator operating state of bringing has realized accurately controlling by the output optical parameter of single light fixture the effect of illuminator operating state.
Wherein, as shown in Figure 6, illuminator can comprise n light fixture, light fixture can be led chip or LED lamp, the LED lamp can comprise monochromatic LED chip or multi-colored led chip, and thus, light fixture can be the white light that is fixed in certain reference color temperature, also can be the adjustable lampion of color, the light that these light sources send mixes the mixed light that becomes illuminator output in the space; The monochromatic signal of telecommunication can be R, G, three monochromatic signals of telecommunication of B, also can be X, the Y of CIE, the signal of telecommunication of three coordinates of Z.
Particularly, as shown in Figure 6 and Figure 7, this illuminator can comprise one or more deriving means 10 and signal processing unit, and signal receiving device 30 and signal processing apparatus 50 can be arranged in the signal processing unit.When deriving means 10 obtains all monochromatic signals of telecommunication in the mixed light and is R, G, three monochromatic signals of telecommunication of B, signal receiving device 30 carries out demodulation process to three monochromatic signals of telecommunication respectively, obtain three the monochrome signal sequences corresponding with each light fixture, then signal processing apparatus 50 calculates three monochrome signal sequence values of averaging of each light fixture respectively, to obtain the average of three monochrome signal sequences of each light fixture, calculation element 70 is according to the output optical parameter of this each light fixture of mean value computation afterwards; When deriving means 10 obtained the signal of telecommunication of X, Y that all monochromatic signals of telecommunication in the mixed light are CIE, three coordinates of Z, the processing procedure the when processing procedure of signal processing apparatus 50 and the calculation element 70 monochromatic signals of telecommunication is R, G, three monochromatic signals of telecommunication of B with the monochromatic signal of telecommunication was consistent.By signal receiving device 30 the monochromatic signal of telecommunication in the illuminator output mixed light that gets access to is carried out demodulation process, get access to the burst of single light fixture, and then burst processed the output optical parameter of obtaining single light fixture, can obtain the output intensity of each light fixture, the state of photochromic coloured silk according to the output optical parameter of each light fixture, thereby accurately know the operating state of illuminator, so that the user can control illuminator according to these parameters.
In addition, the light fixture of illuminator can be by the driving signal of receiving demodulation, driving by led driver is luminous, as shown in Figure 7, the driving signal of the chip receiving demodulation of the LED lamp in the illuminator, in the present embodiment, with the driving signal of pwm signal (pulsewidth restituted signal) as the LED lamp, wherein, modulation signal can be according to the CDMA of standard, TDMA, or the FDMA communication technology is determined, for example, if restituted signal is FDMA, then the base frequency of the led chip in the driving signal of different LED lamps or the single lamp is different and unique.As shown in Figure 4, in the application's illuminator, 30 pairs of monochromatic signals of telecommunication of signal receiving device carry out demodulation process, therefrom extract the monochrome signal sequence corresponding to single led light fixture, demodulation method is determined by the driving signal of illuminator, such as when using the TDMA technology, signal receiving device 30 can read monochrome signal sequence corresponding to certain single lamp according to prior official hour sheet, wherein, timeslice is a time interval, in the interval of some timeslices, only has a LED lamp luminescence, therefore at this moment between in the section, light signal is single, but not stack.
From above description, can find out, the present invention has realized following technique effect: by extract the light signal of single light fixture from the mixed light of illuminator output, and this signal processed, get access to the output optical parameter of single light fixture, the output optical parameter of single light fixture can accurately reflect the operating state of illuminator, thereby can control the light intensity of illuminator according to the output light flux parameter of each light fixture, accurately control the color output of illuminator by chromaticity coordinates parameter and color temperature parameters, each light fixture color change in the colour temperature of white light and the illuminator, solved in the prior art because according to the parameter of illuminator output mixed light illuminator being monitored, and the problem that can not accurately monitor and control the illuminator operating state of bringing has realized accurately controlling by the output optical parameter of single light fixture the effect of illuminator operating state.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the method for measurement of an illuminator output optical parameter is characterized in that, comprising:
Obtain all the monochromatic signals of telecommunication in the illuminator output mixed light, wherein, described illuminator comprises one or more light fixtures;
Carry out respectively demodulation process according to each described monochromatic signal of telecommunication, to obtain and corresponding all the monochrome signal sequences of each described light fixture;
According to the respectively value of the averaging calculating of each described monochrome signal sequence, to obtain the burst average corresponding with each described monochrome signal sequence;
Carry out optical parameter according to described burst average and calculate, to obtain the output optical parameter of each described light fixture, wherein, described output optical parameter comprises luminous flux parameter, chromaticity coordinates parameter and color temperature parameters.
2. method according to claim 1 is characterized in that, the step of obtaining all monochromatic signals of telecommunication of illuminator output mixed light comprises:
Obtain the mixed light of described illuminator output;
According to the processing that filters of described mixed light, to obtain all the described monochromatic light signals in the described mixed light;
Carry out respectively signal of telecommunication conversion according to each described monochromatic light signal, to obtain the described monochromatic signal of telecommunication.
3. method according to claim 1 is characterized in that, carries out optical parameter according to described burst average and calculates, and comprises with the step of the output optical parameter of obtaining each described light fixture:
According to the calculating of multiplying each other of described burst average and the first calibration coefficient, with the chromaticity coordinates parameter in the described output optical parameter of obtaining each described light fixture.
4. method according to claim 3 is characterized in that, in the calculating of multiplying each other according to described burst average and the first calibration coefficient, after the described chromaticity coordinates parameter of obtaining each described light fixture, described method also comprises:
Carry out Coordinate Conversion according to described chromaticity coordinates parameter, to obtain the xyz coordinate;
Carry out colour temperature according to described xyz coordinate and calculate, with the color temperature parameters in the described output optical parameter of obtaining each light fixture.
5. method according to claim 1 is characterized in that, carries out optical parameter according to described burst average and calculates, and comprises with the step of the output optical parameter of obtaining each described light fixture:
According to the calculating of multiplying each other of described burst average and the second calibration coefficient, with the luminous flux parameter in the described output optical parameter of obtaining each described light fixture.
6. method according to claim 1 is characterized in that, carries out respectively mean value computation according to each described monochrome signal sequence, comprises with the step of obtaining the burst average corresponding with each described monochrome signal sequence:
Carry out respectively Amplitude Estimation according to each described monochrome signal sequence and calculate, to obtain the amplitude of each described monochrome signal sequence;
Input signal according to described amplitude and described illuminator calculates according to first formula value of averaging, and to obtain each described monochrome signal serial mean, wherein, described the first formula is: the duty ratio of average=amplitude * input signal.
7. the measurement mechanism of an illuminator output optical parameter is characterized in that, comprising:
Deriving means is used for obtaining all monochromatic signals of telecommunication that illuminator is exported mixed light, and wherein, described illuminator comprises one or more light fixtures;
Signal receiving device is connected with described the first deriving means, is used for carrying out respectively demodulation process according to each described monochromatic signal of telecommunication, to obtain and corresponding all the monochrome signal sequences of each described light fixture;
Signal processing apparatus is connected with described signal receiving device, is used for according to the respectively value of the averaging calculating of each described monochrome signal sequence, to obtain the burst average corresponding with each described monochrome signal sequence;
Calculation element, be connected with described signal processing apparatus, be used for carrying out optical parameter according to described burst average and calculate, to obtain the output optical parameter of each described light fixture, wherein, described output optical parameter comprises luminous flux parameter, chromaticity coordinates parameter and color temperature parameters.
8. device according to claim 7 is characterized in that, described deriving means comprises:
Filtering apparatus is used for obtaining the mixed light of described illuminator output, and according to the processing that filters of described mixed light, to obtain all the described monochromatic light signals in the described mixed light;
Optical sensor is connected with described filtering apparatus, is used for carrying out respectively signal of telecommunication conversion according to each described monochromatic light signal, to obtain the described monochromatic signal of telecommunication.
9. device according to claim 7 is characterized in that, described calculation element comprises:
The first calculator is connected with described signal processing apparatus, is used for according to the calculating of multiplying each other of described burst average and the first calibration coefficient, with the chromaticity coordinates parameter in the described output optical parameter of obtaining each described light fixture.
10. device according to claim 9 is characterized in that, described calculation element also comprises:
The first transducer is connected with described the first calculator, is used for carrying out Coordinate Conversion according to described chromaticity coordinates parameter, to obtain the xyz coordinate;
The second calculator is connected with described the first transducer, is used for carrying out colour temperature according to described xyz coordinate and calculates, with the color temperature parameters in the described output optical parameter of obtaining each light fixture.
11. device according to claim 7 is characterized in that, described calculation element also comprises:
The 3rd calculator is connected with described signal processing apparatus, is used for according to the calculating of multiplying each other of described burst average and the second calibration coefficient, with the luminous flux parameter in the described output optical parameter of obtaining each described light fixture.
12. device according to claim 7 is characterized in that, described signal processing apparatus comprises:
The 4th calculator is connected with described signal receiving device, is used for carrying out respectively Amplitude Estimation according to each described monochrome signal sequence and calculates, to obtain the amplitude of each described monochrome signal sequence;
The 5th calculator, be connected with described the 4th calculator, be used for calculating according to first formula value of averaging according to the input signal of described amplitude and described illuminator, to obtain each described monochrome signal serial mean, wherein, described the first formula is: the duty ratio of average=amplitude * input signal.
13. an illuminator comprises one or more light fixtures, it is characterized in that, comprising: the measurement mechanism of the described illuminator output of any one optical parameter in the claim 7 to 12.
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