CN115866831B - Indoor LED voltage control method and system based on Markov model - Google Patents
Indoor LED voltage control method and system based on Markov model Download PDFInfo
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- CN115866831B CN115866831B CN202211663569.7A CN202211663569A CN115866831B CN 115866831 B CN115866831 B CN 115866831B CN 202211663569 A CN202211663569 A CN 202211663569A CN 115866831 B CN115866831 B CN 115866831B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The application relates to the technical field of LED voltage control, in particular to an indoor LED voltage control method and system based on a Markov model, which are applied to any LED, wherein the method comprises the following steps: s1, acquiring indoor illumination intensity L in real time according to acquisition time interval delta t b The method comprises the steps of carrying out a first treatment on the surface of the S2, collecting the illumination intensity L b And user-defined indoor illumination intensity L a Leading in a Markov model to obtain a target voltage value U; and S3, adjusting the output voltage value of the LED according to the target voltage value U. According to the application, the acquired result is calculated by combining with the Markov model, and the model result is accurately applied, so that the accuracy of illumination data is improved, the stability of the LED control state is enhanced, and the energy consumption and the resource waste are prevented.
Description
Technical Field
The application relates to the technical field of LED voltage control, in particular to an indoor LED voltage control method and system based on a Markov model.
Background
At present, most illumination products only can meet basic illumination functions, the intelligent degree is low, and a simple, convenient and efficient control system for automatically adjusting brightness is lacked. The simple lighting system is still applied to places such as schools and office buildings where a large number of lighting equipment are needed, and only full power or zero power output (namely on or off) can cause a large amount of electric energy loss, so that the use process is unstable, and other more problems such as flickering or eye injury are easily caused. The current light adjusting mode is a mechanical addition and subtraction mode, namely, the increase or decrease of the total luminous intensity is achieved by controlling the number of the lighting lamps; one method is an electrical control method, namely, various dimmers are used to change the working voltage or current of the lamp, so as to adjust the luminous intensity of the lamp, but the first type of the current large-scale lighting equipment can only be adopted in the scene of large-scale lighting equipment, and the brightness of a power supply can not be changed according to the current illumination intensity, so that the electric energy consumption and the resource waste are caused.
Disclosure of Invention
The application aims to provide an indoor LED voltage control method and system based on a Markov model, which are used for calculating an acquisition result by combining the Markov model, and accurately applying the model result, so that the accuracy of illumination data is improved, the stability of an LED control state is enhanced, and energy consumption and resource waste are prevented.
To achieve the purpose, the application adopts the following technical scheme:
an indoor LED voltage control method based on a Markov model is applied to any one LED and comprises the following steps:
s1, acquiring indoor illumination intensity L in real time according to acquisition time interval delta t b ；
S2, collecting the illumination intensity L b And user-defined indoor illumination intensity L a Leading in a Markov model to obtain a target voltage value U;
and S3, adjusting the output voltage value of the LED according to the target voltage value U.
Preferably, in S2, the illumination intensity L to be collected b And user-defined indoor illumination intensity L a Introducing a Markov model to obtain a target voltage value U, wherein the method comprises the following steps of:
s21, collecting the illumination intensity L b And user-defined indoor illumination intensity L a Converted into a corresponding luminous flux T by the formula (3) a And T b And calculating the light flux difference k of the two through a formula (4);
T＝L·Ω (3)
wherein T represents luminous flux, unit lm; l represents the illumination intensity, unit cd; omega represents a unit solid angle, unit sr;
k＝T a -T b (4)
s22, judging whether the light flux difference k of the two is zero, if so, not adjusting, and returning to the step S1; if not, then step S23 is performed;
s23, luminous flux T b The light flux difference k of the two is substituted into formula (5):
T b(t+Δt) -T b(t) ＝kT b(t) Δt (5)
wherein when Δt approaches 0, there is:
after separating the variables, the following are obtained:
T b(t) ＝T b(t＝0) e kt (7)
wherein T is b(t＝0) Indoor luminous flux recorded at the current moment; t (T) b(t) Is the indoor target luminous flux at the time t after the delta t time; Δt is a set acquisition time interval;
s24, according to the target luminous flux T b(t) Substituting formula (8):
U(t)＝mT b(t) (8)
wherein U (t) is a target voltage value after the delta t moment, and the unit is V; m is a fixed conversion coefficient between luminous flux and supply voltage.
Preferably, in S3, the output voltage value of the LED is adjusted according to the target voltage value U, specifically, the duty ratio of the output PWM is changed by changing the auto reload value of the timer.
An indoor LED voltage control system based on a marsase model is applied to any LED, and adopts an indoor LED voltage control method based on a marsase model as described above, comprising:
the illumination acquisition sensor is used for acquiring indoor illumination intensity L in real time according to an acquisition time interval delta t b ；
The main control unit is used for collecting the illumination intensity L b And user-defined indoor illumination intensity L a Leading in a Markov model to obtain a target voltage value U;
and the LED driver is used for adjusting the output voltage value of the LED according to the target voltage value U.
Preferably, the main control unit comprises a calculation module;
the computing module is used for realizing the following steps:
s21, collecting the illumination intensity L b And user-defined indoor illumination intensity L a Converted into a corresponding luminous flux T by the formula (3) a And T b And calculating the light flux difference k of the two through a formula (4);
T＝L·Ω (3)
wherein T represents luminous flux, unit lm; l represents the illumination intensity, unit cd; omega represents a unit solid angle, unit sr;
k＝T a -T b (4)
s22, judging whether the light flux difference k of the two is zero, if so, not adjusting, and returning to the step S1; if not, then step S23 is performed;
s23, luminous flux T b The light flux difference k of the two is substituted into formula (5):
T b(t+Δt) -T b(t) ＝kT b(t) Δt (5)
wherein when Δt approaches 0, there is:
after separating the variables, the following are obtained:
T b(t) ＝T b(t＝0) e kt (7)
wherein T is b(t＝0) Indoor luminous flux recorded at the current moment; t (T) b(t) Is the indoor target luminous flux at the time t after the delta t time; Δt is a set acquisition time interval;
s24, according to the target luminous flux T b(t) Substituting formula (8):
U(t)＝mT b(t) (8)
wherein U (t) is a target voltage value after the delta t moment, and the unit is V; m is a fixed conversion coefficient between luminous flux and supply voltage.
Preferably, the main control unit further comprises a timing module;
the timing module is used for changing the duty ratio of the output PWM by changing the automatic reloading value of the timer.
One of the above technical solutions has the following beneficial effects: the obtained result is calculated by combining with a Markov model, and the model result is accurately applied, so that the accuracy of illumination data is improved, the stability of the LED control state is enhanced, and the energy consumption and the resource waste are prevented.
Drawings
FIG. 1 is a schematic flow chart of an indoor LED voltage control method based on a Markov model;
FIG. 2 is a control schematic diagram of the present application in a method for controlling LED voltage in a room based on a Markov model;
FIG. 3 is a schematic diagram of the structure of the LED voltage control system in a room based on the Markov model;
Detailed Description
The technical scheme of the application is further described below by the specific embodiments with reference to the accompanying drawings.
In order to make the technical scheme clearer, a marsase model is summarized:
the marsase model assumes: in an independent biological population, the rate of change of the number of biological populations is a constant lambda that remains unchanged.
Description of the Markass model problem: let x denote time, y denote the number of organism populations, and the rate of change of the organism populations be λ. According to the assumption that the change rate lambda value is unchanged in the Markov model, the change quantity of the biological population quantity is as follows in any given time period delta x:
y(x+Δx)-y(x)＝λy(x)Δx (1)
model solving: taking according to the assumption formula (2)The solution of the differential equation can be found as:
y＝y 0 e λx (2)
the technical scheme provides an indoor LED voltage control method based on a Markov model based on the principle of the Markov model, which is applied to any LED as shown in figure 1 and comprises the following steps:
s1, acquiring indoor illumination intensity L in real time according to acquisition time interval delta t b ；
S2, collecting the illumination intensity L b And user-defined indoor illumination intensity L a Leading in a Markov model to obtain a target voltage value U;
and S3, adjusting the output voltage value of the LED according to the target voltage value U.
According to the technical scheme, in order to solve the current large-adaptability dimming problem, the acquired result is calculated by combining with the Markass model, and the model result is accurately applied, so that the accuracy of illumination data is improved, the stability of the LED control state is enhanced, and the energy consumption and the resource waste are prevented.
Further describing, as shown in FIG. 2, in S2, the illumination intensity L to be collected b And user-defined indoor illumination intensity L a Introducing a Markov model to obtain a target voltage value, wherein the method comprises the following steps of:
s21, collecting the illumination intensity L b And user-defined indoor illumination intensity L a Converted into a corresponding luminous flux T by the formula (3) a And T b And calculating the light flux difference k of the two through a formula (4);
T＝L·Ω (3)
wherein T represents luminous flux, unit lm; l represents the illumination intensity, unit cd; omega represents a unit solid angle, unit sr;
k＝T a -T b (4)
s22, judging whether the light flux difference k of the two is zero, if so, not adjusting, and returning to the step S1; if not, then step S23 is performed;
s23, luminous flux T b The light flux difference k of the two is substituted into formula (5):
T b(t+Δt) -T b(t) ＝kT b(t) Δt (5)
wherein when Δt approaches 0, there is:
after separating the variables, the following are obtained:
T b(t) ＝T b(t＝0) e kt (7)
wherein T is b(t＝0) Indoor luminous flux recorded at the current moment; t (T) b(t) Is the indoor target luminous flux at the time t after the delta t time; Δt is a set acquisition time interval;
s24, according to the target luminous flux T b(t) Substituting formula (8):
U(t)＝mT b(t) (8)
wherein U (t) is a target voltage value after the delta t moment, and the unit is V; m is a fixed conversion coefficient between luminous flux and supply voltage.
Further describing, in S3, the output voltage value of the LED is adjusted according to the target voltage value, specifically, the duty ratio of the output PWM is changed by changing the auto reload value of the timer.
In order to prevent the problem that the abrupt change of voltage is not suitable for light or dazzling in the visual brightness adjusting process, the effect of gradual change of voltage and brightness is achieved by changing the automatic reloading value of the singlechip timer in the adjusting process. The application not only can meet the brightness required by a user by adjusting the output voltage value of the LED, but also can make the working environment comfortable so as to achieve the purposes of increasing the output, reducing accidents, saving energy and reducing consumption.
As shown in fig. 3, an indoor LED voltage control system based on a marsase model is applied to any one LED, and adopts an indoor LED voltage control method based on a marsase model as described above, including:
the illumination acquisition sensor is used for acquiring indoor illumination intensity L in real time according to an acquisition time interval delta t b ；
A main control unit, wherein the main control unit,for collecting the intensity L of the illumination b And user-defined indoor illumination intensity L a Leading in a Markov model to obtain a target voltage value U;
and the LED driver is used for adjusting the output voltage value of the LED according to the target voltage value U.
According to the technical scheme, the indoor LED lamp is controlled by the indoor LED voltage control system based on the Markass model, so that the illumination intensity of the LED can be automatically adjusted, and the problem that the adjustment efficiency of the existing household intelligent lighting system is low is solved.
Further stated, the said master control unit includes the calculation module;
the computing module is used for realizing the following steps:
s21, collecting the illumination intensity L b And user-defined indoor illumination intensity L a Converted into a corresponding luminous flux T by the formula (3) a And T b And calculating the light flux difference k of the two through a formula (4);
T＝L·Ω (3)
wherein T represents luminous flux, unit lm; l represents the illumination intensity, unit cd; omega represents a unit solid angle, unit sr;
k＝T a -T b (4)
s22, judging whether the light flux difference k of the two is zero, if so, not adjusting, and returning to the step S1; if not, then step S23 is performed;
s23, luminous flux T b The light flux difference k of the two is substituted into formula (5):
T b(t+Δt) -T b(t) ＝kT b(t) Δt (5)
wherein when Δt approaches 0, there is:
after separating the variables, the following are obtained:
T b(t) ＝T b(t＝0) e kt (7)
wherein T is b(t＝0) Indoor luminous flux recorded at the current moment; t (T) b(t) Is the indoor target luminous flux at the time t after the delta t time; Δt is a set acquisition time interval;
s24, according to the target luminous flux T b(t) Substituting formula (8):
U(t)＝mT b(t) (8)
wherein U (t) is a target voltage value after the delta t moment, and the unit is V; m is a fixed conversion coefficient between luminous flux and supply voltage.
Further describing, the main control unit further comprises a timing module;
the timing module is used for changing the duty ratio of the output PWM by changing the automatic reloading value of the timer.
The technical principle of the present application is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the application and should not be taken in any way as limiting the scope of the application. Other embodiments of the application will occur to those skilled in the art from consideration of this specification without the exercise of inventive faculty, and such equivalent modifications and alternatives are intended to be included within the scope of the application as defined in the claims.
Claims (2)
1. An indoor LED voltage control method based on a Markov model is characterized by being applied to any LED and comprising the following steps:
s1, acquiring indoor illumination intensity L in real time according to acquisition time interval delta t b ；
S2, collecting the illumination intensity L b And user-defined indoor illumination intensity L a Leading in a Markov model to obtain a target voltage value U;
s3, adjusting the output voltage value of the LED according to the target voltage value U;
in S2, the light intensity L to be collected b And user-defined indoor illumination intensity L a Introducing a Markov model to obtain a target voltage value, wherein the method comprises the following steps of:
s21, the collected illumination intensityDegree L b And user-defined indoor illumination intensity L a Converted into a corresponding luminous flux T by the formula (3) a And T b And calculating the light flux difference k of the two through a formula (4);
（3）
wherein T represents luminous flux, unit lm; l represents the illumination intensity, unit cd; omega represents a unit solid angle, unit sr;
（4）
s22, judging whether the light flux difference k of the two is zero, if so, not adjusting, and returning to the step S1; if not, then step S23 is performed;
s23, luminous flux T b The light flux difference k of the two is substituted into formula (5):
（5）
wherein when Δt approaches 0, there is:
（6）
after separating the variables, the following are obtained:
（7）
wherein the method comprises the steps ofIndoor luminous flux recorded at the current moment; />Is the indoor target luminous flux at the time t after the delta t time;Δt is a set acquisition time interval;
s24, substituting the target luminous flux into a formula (8):
（8）
wherein U (t) is a target voltage value after the delta t moment, and the unit is V; m is a fixed conversion coefficient between luminous flux and supply voltage;
in S3, the output voltage value of the LED is adjusted according to the target voltage value U, specifically, the duty ratio of the output PWM is changed by changing the auto reload value of the timer.
2. An indoor LED voltage control system based on a marsase model, which is applied to any LED and adopts an indoor LED voltage control method based on a marsase model as claimed in claim 1, comprising:
the illumination acquisition sensor is used for acquiring indoor illumination intensity L in real time according to an acquisition time interval delta t b ；
The main control unit is used for collecting the illumination intensity L b And user-defined indoor illumination intensity L a Leading in a Markov model to obtain a target voltage value U;
the LED driver is used for adjusting the output voltage value of the LED according to the target voltage value U;
the main control unit comprises a calculation module;
the computing module is used for realizing the following steps:
s21, collecting the illumination intensity L b And user-defined indoor illumination intensity L a Converted into a corresponding luminous flux T by the formula (3) a And T b And calculating the light flux difference k of the two through a formula (4);
（3）
wherein T represents luminous flux, unit lm; l represents the illumination intensity, unit cd; omega represents a unit solid angle, unit sr;
（4）
s22, judging whether the light flux difference k of the two is zero, if so, not adjusting, and returning to the step S1; if not, then step S23 is performed;
s23, luminous flux T b The light flux difference k of the two is substituted into formula (5):
（5）
wherein when Δt approaches 0, there is:
（6）
after separating the variables, the following are obtained:
（7）
wherein the method comprises the steps ofIndoor luminous flux recorded at the current moment; />Is the indoor target luminous flux at the time t after the delta t time; Δt is a set acquisition time interval;
s24, substituting the target luminous flux into a formula (8):
（8）
wherein U (t) is a target voltage value after the delta t moment, and the unit is V; m is a fixed conversion coefficient between luminous flux and supply voltage;
the main control unit also comprises a timing module;
the timing module is used for changing the duty ratio of the output PWM by changing the automatic reloading value of the timer.
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