CN112601315A - Intelligent lighting system based on cloud platform and brightness and full-color adjusting method thereof - Google Patents

Intelligent lighting system based on cloud platform and brightness and full-color adjusting method thereof Download PDF

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Publication number
CN112601315A
CN112601315A CN202011580101.2A CN202011580101A CN112601315A CN 112601315 A CN112601315 A CN 112601315A CN 202011580101 A CN202011580101 A CN 202011580101A CN 112601315 A CN112601315 A CN 112601315A
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led lamp
cloud platform
brightness
color
lamp group
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Inventor
蒋义钐
蔡启博
王玉成
阮秀凯
崔桂华
岳虹宇
闫正兵
张杨
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Intelligent Lock Research Institute Of Wenzhou University
Wenzhou Zhian Yunlian Network Technology Co ltd
Wenzhou Jingcai Optoelectronics Co ltd
Wenzhou University
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Intelligent Lock Research Institute Of Wenzhou University
Wenzhou Zhian Yunlian Network Technology Co ltd
Wenzhou Jingcai Optoelectronics Co ltd
Wenzhou University
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Priority to CN202011580101.2A priority Critical patent/CN112601315A/en
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current

Abstract

The invention provides an intelligent lighting system based on a cloud platform, which comprises the cloud platform, a control device and an LED lamp bank, wherein the cloud platform, the control device and the LED lamp bank are sequentially connected; the cloud platform receives an adjusting instruction of brightness or full color of the LED lamp group by a user and issues the adjusting instruction to the control device; the control device forms a PWM signal with corresponding level and duty ratio according to a brightness or full-color adjusting instruction issued by the cloud platform, and is used for controlling the output current of each LED lamp in the LED lamp group to change from 0% to 100% so as to adjust the brightness of the LED lamp group; or controlling the RGB chromaticity coordinate value of each LED lamp in the LED lamp group to adjust the color of the LED lamp group. By implementing the invention, the problems of single function and energy waste of the traditional LED intelligent lighting system are solved.

Description

Intelligent lighting system based on cloud platform and brightness and full-color adjusting method thereof
Technical Field
The invention relates to the technical field of intelligent lighting systems, in particular to an intelligent lighting system based on a cloud platform and a brightness and full-color adjusting method thereof.
Background
Along with the development of economy, the level of electronization and automation in daily life of people is continuously improved. In today with increasingly competitive competition, the use of data and IT technology is undoubtedly an important means for how to efficiently manage, effectively control cost and improve self competitiveness. In the background of such times, the development of intelligent lighting is just a new development trend.
The LED light source has the characteristics of high brightness and low energy consumption, and is widely applied to various illumination occasions. With the rapid development of LED technology in recent years, the functions of emerging lighting products are continuously improved. Nowadays, LED products are various in types, complete in functions and well applied to different fields. Meanwhile, the LED technology is continuously being innovated, new materials with special functions are coming out, and the LED production technology is getting mature. With the increasing performance and decreasing cost of LEDs over the future, coupled with the new worldwide ban on incandescent lamps, the market share of semiconductor lighting will expand rapidly.
However, the traditional LED intelligent lighting system not only has a single function, but also wastes energy, and obviously cannot meet the needs of the contemporary society. Therefore, improvements and enhancements of intelligent lighting systems are imminent.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to provide an intelligent lighting system based on a cloud platform and a brightness and full-color adjusting method thereof, and solve the problems of single function and energy waste of the traditional LED intelligent lighting system.
In order to solve the technical problem, an embodiment of the invention provides an intelligent lighting system based on a cloud platform, which comprises the cloud platform, a control device and an LED lamp set, wherein the cloud platform, the control device and the LED lamp set are sequentially connected; wherein the content of the first and second substances,
the cloud platform is used for receiving a brightness or full-color adjusting instruction of the LED lamp group by a user and sending the brightness or full-color adjusting instruction to the control device;
the control device is used for forming a PWM signal with corresponding level and duty ratio according to a brightness or full-color adjusting instruction issued by the cloud platform, and is used for controlling the output current of each LED lamp in the LED lamp group to change from 0% to 100% so as to adjust the brightness of the LED lamp group; or controlling the RGB chromaticity coordinate value of each LED lamp in the LED lamp group to adjust the color of the LED lamp group.
Wherein, the cloud platform is an Ali cloud IOT platform.
The control device comprises a raspberry pi control module and a PWM signal driving module which are sequentially connected; wherein the content of the first and second substances,
the raspberry pi control module is connected with the cloud platform and used for forming PWM signals with corresponding levels and duty ratios according to brightness or full-color adjusting instructions issued by the cloud platform;
the PWM signal driving module is connected with the LED lamp group and used for controlling the output current of each LED lamp in the LED lamp group to change from 0% to 100% to adjust the brightness of the LED lamp group or controlling the RGB chromaticity coordinate value of each LED lamp in the LED lamp group to adjust the color of the LED lamp group according to the PWM signal of the corresponding level and duty ratio; the PWM signal driving module is a UCS2903B device for PWM constant current output.
The LED lamp group is formed by connecting 6 full-color LEDs of 0.5W in series.
The embodiment of the invention also provides a brightness and full-color adjusting method of the intelligent lighting system based on the cloud platform, which is realized on the intelligent lighting system based on the cloud platform, and the method comprises the following steps:
step S1, the control device obtains a brightness or full-color adjusting instruction of the LED lamp set on the cloud platform by the user;
step S2, the control device forms a PWM signal with corresponding level and duty ratio according to the received brightness or full-color adjusting instruction, so as to control the output current of each LED lamp in the LED lamp group to change from 0% to 100% to adjust the brightness of the LED lamp group; or controlling the RGB chromaticity coordinate value of each LED lamp in the LED lamp group to adjust the color of the LED lamp group.
Wherein, the step S2 specifically includes:
if the control device receives a brightness adjusting instruction, a PWM signal with a corresponding level and a constant duty ratio is formed to control the output current of each LED lamp in the LED lamp group to change from 0% to 100% so as to adjust the brightness of the LED lamp group.
Wherein the step S2 further includes:
if the control device receives a full-color adjusting instruction, PWM signals with corresponding levels and different duty ratios are formed to control RGB chromaticity coordinate values of the LED lamps in the LED lamp set to adjust the colors of the LED lamp set.
Wherein according to the formula
Figure BDA0002865784480000031
Obtaining the duty ratio of the PWM signal; wherein the content of the first and second substances,
Dr、Dg、Dbthe duty ratio of PWM signals of RGB three primary colors;
Lmis the luminous flux of the mixed color light to be modulated, and
Figure BDA0002865784480000032
(x, y) is the chromaticity coordinate of the color to be exchanged;
(xr，yr)，(xg，yg),(xb，yb) The coordinates of the vertex R, the vertex G and the vertex B of the chromaticity triangle are respectively.
Wherein the method further comprises:
-3.000x as a function of the chromaticity coordinate according to the blackbody radiation locus2+2.870x-0.275, and a known color temperature TcpCalculating chromaticity coordinates of typical daylight by the following formula (4) or (5); wherein the content of the first and second substances,
if T is more than or equal to 4000Kcp≤7000K，
Figure BDA0002865784480000033
If 7000K is less than or equal to Tcp≤25000K，
Figure BDA0002865784480000041
The embodiment of the invention has the following beneficial effects:
the method is characterized in that a cloud platform is used for receiving a brightness or full-color adjusting instruction of a user for an LED lamp set, and a PWM signal with corresponding level and duty ratio is formed through a control device according to the brightness or full-color adjusting instruction so as to control the output current of each LED lamp in the LED lamp set to change from 0% to 100% to adjust the brightness of the LED lamp set; or the RGB chromaticity coordinate values of all the LED lamps in the LED lamp group are controlled to adjust the color of the LED lamp group, so that the problems of single function and energy waste of the traditional LED intelligent lighting system are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a schematic diagram of a connection structure of an intelligent lighting system based on a cloud platform according to an embodiment of the present invention;
fig. 2 is an xy chromaticity diagram used in a color matching process in an application scene of the cloud platform based intelligent lighting system according to the embodiment of the present invention;
fig. 3 is a flowchart of a method for adjusting brightness and full color of an intelligent lighting system based on a cloud platform according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present invention, an intelligent lighting system based on a cloud platform includes a cloud platform 1, a control device 2, and an LED lamp set 3, which are connected in sequence; wherein the content of the first and second substances,
the cloud platform 1 is used for receiving a brightness or full-color adjusting instruction of the LED lamp group 3 performed by a user and sending the brightness or full-color adjusting instruction to the control device 2; the cloud platform 1 is an Aliskive IOT platform.
The control device 2 is used for forming a PWM signal with a corresponding level and a duty ratio according to a brightness or full-color adjusting instruction issued by the cloud platform 1, and is used for controlling the output current of each LED lamp in the LED lamp group 3 to change from 0% to 100% so as to adjust the brightness of the LED lamp group 3; or controlling the RGB chromaticity coordinate values of the LED lamps in the LED lamp group 3 to adjust the color of the LED lamp group 3. The control device 2 comprises a raspberry pi control module and a PWM signal driving module which are connected in sequence; the raspberry pi control module is connected with the cloud platform 1 and used for forming a PWM signal with corresponding level and duty ratio according to a brightness or full-color adjusting instruction issued by the cloud platform 1; the PWM signal driving module is connected with the LED lamp group 3 and used for controlling the output current of each LED lamp in the LED lamp group 3 to change from 0% to 100% according to the PWM signal of the corresponding level and duty ratio so as to adjust the brightness of the LED lamp group 3; or controlling the RGB chromaticity coordinate value of each LED lamp in the LED lamp group 3 to adjust the color of the LED lamp group 3; the PWM signal driving module is a UCS2903B device for PWM constant current output.
The LED lamp group 3 adopts 6 full-color LEDs of 0.5W which are connected in series.
In the embodiment of the present invention, the cloud platform 1 provides two user-oriented and development-oriented platforms, namely, a management portal and a developer portal, and further includes four modules, which are respectively: a core component module, which comprises equipment control, data storage, an alarm engine, route distribution, equipment connection, protocol analysis and the like; a configuration management module comprises alarm rule configuration, alarm disposal configuration, protocol model management and alarm information management; the operation and maintenance module comprises work order management, routing inspection management, operation and maintenance record and fault processing record; and fourthly, a basic information management module which comprises equipment management, application management, user management and equipment/application information statistics. At this time, the device is accessed to the platform by the access process and the operation method provided by the cloud platform 1. The basic steps can be divided into login and registration, product creation, equipment addition, definition of a thing model, Aries cloud configuration and Modbus variable addition. Meanwhile, a system name is created on a product management page, and a node type, a networking mode and a data format are set. Nodes and gateways of the lamps are established on the cloud platform, and different data points including color data, switch data and other information are arranged in a single lamp node.
The raspberry group control module in the control device 2 selects the raspberry group for four generations, and provides a unified control instruction for the whole intelligent lighting system. The control command is compatible with common lamps, color temperature lamps and colored lamps, all the lamps can be turned on/off, the color temperature lamps can adjust the color temperature, and the colored lamps can adjust the color.
The raspberry group receives data from the serial port, analyzes the received data, makes corresponding action on the LED lamp group 3 if the received data are useful lamp control instructions, and discards the data if the received data are not useful lamp control instructions. When the raspberry party lamp control instruction is analyzed, the address bit is firstly analyzed, and after the address bit is successfully acquired, the corresponding PWM output interface is adjusted, so that a PWM signal with a corresponding level and a duty ratio is formed.
And a PWM signal driving module in the control device 2 adjusts the light of the LED lamp group 3 according to the PWM signal of the corresponding level and duty ratio, and controls the output current of each LED lamp in the LED lamp group 3 to change from 0% to 100%.
Of course, based on the principle that the three primary colors of red, green and blue of a full-color LED are independent from each other, and all other colors can be obtained by mixing the three primary colors in a certain proportion, the color of the LED lamp group 3 is adjusted by controlling the RGB chromaticity coordinate values of the LED lamps in the LED lamp group 3 by using the colorimetry principle in combination with the 1931CIE (international commission on illumination) x-y standard chromaticity system.
In the embodiment of the present invention, the duty ratio of the adjustment signal and the chromaticity coordinate of the corresponding color can be described by using the PWM dimming with an appropriate functional relationship. The duty ratio of the LED pulse width modulation signal is changed, the chromaticity coordinate value of the LED pulse width modulation signal cannot be influenced, the luminous flux of the element can be correspondingly and linearly changed, the luminous flux and the duty ratio can be subjected to proportional approximation in engineering, and then the relevant function relation of the chromaticity coordinate and the duty ratio can be obtained by combining the Grassmann color mixing law:
Figure BDA0002865784480000061
wherein D isr、Dg、DbThe duty ratio of PWM signals with three primary colors; l ismThe luminous flux of the mixed color light to be adjusted; (x, y) is the chromaticity coordinate of the color to be exchanged; (x)r，yr)，(xg，yg),(xb，yb) The coordinates of the vertex R, the vertex G and the vertex B of the chromaticity triangle are respectively.
The selection of the chromaticity coordinate value cannot exceed the range of the RGB triangle, the setting of the luminous flux cannot exceed the maximum luminous flux value, and the luminous flux of the three-primary-color mixed light simultaneously satisfies the following three formulas, so that the dimming and toning functions of the system can be normally carried out. The maximum luminous flux can be modified according to equation 1:
Figure BDA0002865784480000071
it should be noted that the realization of full-color illumination makes the lamp body illumination application more flexible, can be applicable to the illumination of multiple occasion. However, the lamp designed by the invention is more suitable for indoor illumination application, and in the indoor illumination, the most frequently used function is white light illumination. Most of the black body traces are contained in the RGB triangle in the chromaticity diagram, and white light with any color temperature can be mixed theoretically. Simulating white light of different color temperatures can make the system better used for daily illumination.
Therefore, the RGB triangle in the chromaticity diagram contains most of the black body trace, and theoretically white light of any color temperature can be mixed.
The chromaticity coordinates of the blackbody radiation locus have the following relationship:
y＝-3.000x2+2.870x-0.275 (3)
wherein (x, y) is the chromaticity coordinate of the blackbody radiation locus.
From the correlated known color temperature TcpThe chromaticity coordinates of typical daylight are calculated by:
when 4000K is less than or equal to TcpWhen the temperature is less than or equal to 7000K:
Figure BDA0002865784480000072
when 7000K is less than or equal to TcpWhen the K is less than or equal to 25000K:
Figure BDA0002865784480000073
where K is the color temperature unit and x is the abscissa of the white light in the chromaticity diagram.
In the case of a known correlated color temperature, the required chromaticity coordinate values can be determined in combination with equations (3) to (5), and in combination with equations (1) to (2), the required duty cycle and the corresponding maximum luminous flux value can be determined, so that white light illumination adjustment with a color temperature between 4000K and 25000K can be performed.
In one embodiment, as shown in FIG. 2, the three vertices of the triangle represent the three coordinates of red, green, and blue light, respectively, and the triangle encompasses most of the colors in the chromaticity system. In the actual color matching process, the color matching process may be subdivided.
Firstly, determining a coordinate M to be matched with colors in a chromaticity diagram;
secondly, mixing red light and blue light to obtain an intermediate color P, wherein the specific position of P on the R, B connecting line is determined by the color matching proportion of R and B according to the Grassmann color mixing principle;
finally, the target color M is mixed by the intermediate color P and the green light by applying the same principle. The target color M can be chosen arbitrarily among the RGB triangles.
Thus by controlling R, G, B the different proportions, the mixing results in all colors contained within the triangle RGB.
Furthermore, the mixing ratio between the pulse width modulation methods R, G, B with high precision can be used for precise control, so that precise dimming and color mixing can be realized.
In addition, most of the black body traces are included in the RGB triangle in fig. 2, and white light of any color temperature can be mixed according to the function expression formula of the traces, so as to generate different lighting effects and adapt to various lighting requirements.
As shown in fig. 3, in an embodiment of the present invention, a method for adjusting brightness and full color of an intelligent lighting system based on a cloud platform is provided, where the method is implemented on the intelligent lighting system based on the cloud platform, and the method includes the following steps:
step S1, the control device obtains a brightness or full-color adjusting instruction of the LED lamp set on the cloud platform by the user;
step S2, the control device forms a PWM signal with corresponding level and duty ratio according to the received brightness or full-color adjusting instruction, so as to control the output current of each LED lamp in the LED lamp group to change from 0% to 100% to adjust the brightness of the LED lamp group; or controlling the RGB chromaticity coordinate value of each LED lamp in the LED lamp group to adjust the color of the LED lamp group.
Wherein, the step S2 specifically includes:
if the control device receives a brightness adjusting instruction, a PWM signal with a corresponding level and a constant duty ratio is formed to control the output current of each LED lamp in the LED lamp group to change from 0% to 100% so as to adjust the brightness of the LED lamp group.
Wherein the step S2 further includes:
if the control device receives a full-color adjusting instruction, PWM signals with corresponding levels and different duty ratios are formed to control RGB chromaticity coordinate values of the LED lamps in the LED lamp set to adjust the colors of the LED lamp set.
Wherein according to the formula
Figure BDA0002865784480000091
Obtaining the duty ratio of the PWM signal; wherein the content of the first and second substances,
Dr、Dg、Dbthe duty ratio of PWM signals of RGB three primary colors;
Lmis the luminous flux of the mixed color light to be modulated, and
Figure BDA0002865784480000092
(x, y) is the chromaticity coordinate of the color to be exchanged;
(xr，yr)，(xg，yg),(xb，yb) The coordinates of the vertex R, the vertex G and the vertex B of the chromaticity triangle are respectively.
Wherein the method further comprises:
-3.000x as a function of the chromaticity coordinate according to the blackbody radiation locus2+2.870x-0.275, and a known color temperature TcpCalculating chromaticity coordinates of typical daylight by the following formula (4) or (5); wherein the content of the first and second substances,
if T is more than or equal to 4000Kcp≤7000K，
Figure BDA0002865784480000093
If 7000K is less than or equal to Tcp≤25000K，
Figure BDA0002865784480000094
The embodiment of the invention has the following beneficial effects:
the method is characterized in that a cloud platform is used for receiving a brightness or full-color adjusting instruction of a user for an LED lamp set, and a PWM signal with corresponding level and duty ratio is formed through a control device according to the brightness or full-color adjusting instruction so as to control the output current of each LED lamp in the LED lamp set to change from 0% to 100% to adjust the brightness of the LED lamp set; or the RGB chromaticity coordinate values of all the LED lamps in the LED lamp group are controlled to adjust the color of the LED lamp group, so that the problems of single function and energy waste of the traditional LED intelligent lighting system are solved.
It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.

Claims (9)

1. An intelligent lighting system based on a cloud platform is characterized by comprising the cloud platform, a control device and an LED lamp bank which are sequentially connected; wherein the content of the first and second substances,
the cloud platform is used for receiving a brightness or full-color adjusting instruction of the LED lamp group by a user and sending the brightness or full-color adjusting instruction to the control device;
the control device is used for forming a PWM signal with corresponding level and duty ratio according to a brightness or full-color adjusting instruction issued by the cloud platform, and is used for controlling the output current of each LED lamp in the LED lamp group to change from 0% to 100% so as to adjust the brightness of the LED lamp group; or controlling the RGB chromaticity coordinate value of each LED lamp in the LED lamp group to adjust the color of the LED lamp group.
2. The cloud platform-based smart lighting system of claim 1, wherein the cloud platform is an Aliskian IOT platform.
3. The cloud platform-based intelligent lighting system of claim 1, wherein the control device comprises a raspberry pi control module and a PWM signal driving module connected in sequence; wherein the content of the first and second substances,
the raspberry pi control module is connected with the cloud platform and used for forming PWM signals with corresponding levels and duty ratios according to brightness or full-color adjusting instructions issued by the cloud platform;
the PWM signal driving module is connected with the LED lamp group and used for controlling the output current of each LED lamp in the LED lamp group to change from 0% to 100% to adjust the brightness of the LED lamp group or controlling the RGB chromaticity coordinate value of each LED lamp in the LED lamp group to adjust the color of the LED lamp group according to the PWM signal of the corresponding level and duty ratio; the PWM signal driving module is a UCS2903B device for PWM constant current output.
4. The cloud platform-based smart lighting system of claim 1, wherein the LED light group is formed by connecting 6 full-color LEDs of 0.5W in series.
5. A brightness and full-color adjusting method for an intelligent lighting system based on a cloud platform is characterized in that the method is implemented on the intelligent lighting system based on the cloud platform according to any one of claims 1 to 4, and the method comprises the following steps:
step S1, the control device obtains a brightness or full-color adjusting instruction of the LED lamp set on the cloud platform by the user;
step S2, the control device forms a PWM signal with corresponding level and duty ratio according to the received brightness or full-color adjusting instruction, so as to control the output current of each LED lamp in the LED lamp group to change from 0% to 100% to adjust the brightness of the LED lamp group; or controlling the RGB chromaticity coordinate value of each LED lamp in the LED lamp group to adjust the color of the LED lamp group.
6. The method for adjusting brightness and full color of the intelligent lighting system based on the cloud platform according to claim 5, wherein the step S2 specifically includes:
if the control device receives a brightness adjusting instruction, a PWM signal with a corresponding level and a constant duty ratio is formed to control the output current of each LED lamp in the LED lamp group to change from 0% to 100% so as to adjust the brightness of the LED lamp group.
7. The cloud platform based intelligent lighting system brightness and full color adjusting method according to claim 5, wherein the step S2 further comprises:
if the control device receives a full-color adjusting instruction, PWM signals with corresponding levels and different duty ratios are formed to control RGB chromaticity coordinate values of the LED lamps in the LED lamp set to adjust the colors of the LED lamp set.
8. The cloud platform-based intelligent lighting system brightness and full-color adjusting method according to claim 7, wherein the adjustment is based on a formula
Figure FDA0002865784470000021
Obtaining the duty ratio of the PWM signal; wherein the content of the first and second substances,
Dr、Dg、Dbthe duty ratio of PWM signals of RGB three primary colors;
Lmis the luminous flux of the mixed color light to be modulated, and
Figure FDA0002865784470000031
(x, y) is the chromaticity coordinate of the color to be exchanged;
(xr，yr)，(xg，yg),(xb，yb) The coordinates of the vertex R, the vertex G and the vertex B of the chromaticity triangle are respectively.
9. The cloud platform-based intelligent lighting system brightness and full-color adjustment method of claim 8, wherein the method further comprises:
-3.000x as a function of the chromaticity coordinate according to the blackbody radiation locus2+2.870x-0.275, and a known color temperature TcpCalculating chromaticity coordinates of typical daylight by the following formula (4) or (5); wherein the content of the first and second substances,
if T is more than or equal to 4000Kcp≤7000K，
Figure FDA0002865784470000032
If 7000K is less than or equal to Tcp≤25000K，
Figure FDA0002865784470000033
CN202011580101.2A 2020-12-28 2020-12-28 Intelligent lighting system based on cloud platform and brightness and full-color adjusting method thereof Pending CN112601315A (en)

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Application publication date: 20210402