CN114126144B - LED light modulator and dimming system based on pulse width modulation - Google Patents
LED light modulator and dimming system based on pulse width modulation Download PDFInfo
- Publication number
- CN114126144B CN114126144B CN202111472238.0A CN202111472238A CN114126144B CN 114126144 B CN114126144 B CN 114126144B CN 202111472238 A CN202111472238 A CN 202111472238A CN 114126144 B CN114126144 B CN 114126144B
- Authority
- CN
- China
- Prior art keywords
- period
- environment
- light intensity
- current
- led dimmer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 claims abstract description 108
- 230000002159 abnormal effect Effects 0.000 claims abstract description 30
- 238000004891 communication Methods 0.000 claims abstract description 3
- 230000007613 environmental effect Effects 0.000 claims description 54
- 230000009466 transformation Effects 0.000 claims description 33
- 238000005286 illumination Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 26
- 230000008569 process Effects 0.000 claims description 20
- 230000001502 supplementing effect Effects 0.000 claims description 9
- 230000005856 abnormality Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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]
- H05B45/10—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]
- H05B45/10—Controlling the intensity of the light
- H05B45/12—Controlling the intensity of the light using optical feedback
-
- 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
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
-
- 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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
-
- 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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention belongs to the technical field of LED dimmers, and is used for solving the problem that the existing LED dimming system cannot capture the abnormal working state of the LED dimmer according to the abnormal degree of the environment and natural light, in particular to an LED dimming system based on pulse width modulation, which comprises a dimming processor, wherein the dimming processor is in communication connection with an environment detection module, a light detection module, a current detection module and a service life early warning module; the environment detection module is used for detecting and analyzing the use environment of the led dimmer to obtain an environment early warning period and sending the early warning period to the light detection module through the dimming processor; according to the invention, the environment detection module is used for detecting and analyzing the use environment of the led dimmer to obtain the environment coefficient, and meanwhile, the environment coefficient difference value of each period is used for obtaining the ring system difference, so that the led dimmer is preferentially detected in the period when the current of the led dimmer is detected.
Description
Technical Field
The invention belongs to the technical field of led dimmers, and particularly relates to an led dimmer and a dimming system based on pulse width modulation.
Background
The LED intelligent dimming system is an electrical accessory for changing luminous flux and adjusting illuminance, so that various novel LED lamps achieve high-quality lighting effect, and can be widely applied to occasions such as hotel rooms, venue exhibition halls and the like.
The existing led dimming system does not have the function of detecting the use state of the dimmer through environment detection and natural light analysis, and because the automatic light supplementing system of the dimmer can automatically supplement light through a pulse width modulation mode when the environment and the natural light are abnormal, the abnormal degree of the environment and the natural light determines the safety degree of the automatic light supplementing of the dimmer, and the existing led dimming system does not have the function of capturing the abnormal working state of the led dimmer according to the abnormal degree of the environment and the natural light, so that certain potential safety hazards exist when the led dimmer is used.
Disclosure of Invention
The invention aims to provide a pulse width modulation-based led dimmer and a dimming system, which are used for solving the problem that the existing led dimming system cannot capture the abnormal working state of the led dimmer according to the abnormal degree of the environment and natural light;
the technical problems to be solved by the invention are as follows: how to provide a dimming system capable of analyzing the use state of the led dimmer according to the use environment and natural light of the led dimmer.
The aim of the invention can be achieved by the following technical scheme:
The led dimming system based on pulse width modulation comprises a dimming processor, wherein the dimming processor is in communication connection with an environment detection module, a light detection module, a current detection module and a life early warning module;
The environment detection module is used for detecting and analyzing the use environment of the led dimmer to obtain an environment early warning period and sending the early warning period to the light detection module through the dimming processor;
The light detection module is used for detecting and analyzing natural light of the LED dimmer working environment to obtain a light intensity early warning period, matching the environment early warning period with the light intensity early warning period and obtaining a current detection period through a matching result;
The current detection module detects and analyzes the current safety of the led dimmer in a current detection period to judge whether the current of the led dimmer control circuit is normal or not;
And the life early warning module is used for carrying out early warning analysis on the residual life of the led dimmer.
Further, the specific process of environment detection includes: acquiring an air temperature value of an environment where the led dimmer is used and marking the air temperature value as KW, and acquiring an air humidity value of the environment where the led dimmer is used and marking the air humidity value as KS, through a formulaObtaining an environmental coefficient HJ of the led dimmer, wherein alpha 1 and alpha 2 are proportionality coefficients, and alpha 1 is more than alpha 2 is more than 0; acquiring an environmental coefficient of the led dimmer when the led dimmer works on the previous day, dividing the working time of the led dimmer on the previous day into time periods i, i=1, 2, …, n, marking the initial environmental coefficient of the time period i as HJic, marking the end environmental coefficient of the time period i as HJiz, obtaining a ring system difference HCi of the time period i through a formula HCi= | HJiz-HJic |, and marking the time period with the largest value of the ring system difference HCi as an environmental fluctuation time period; and acquiring all the environmental fluctuation time periods within nearly thirty days, marking three time periods marked as the most times of the environmental fluctuation time periods as environmental early-warning time periods, and marking the average environmental coefficient of the environmental early-warning time periods as HJp.
Further, the specific process of detecting the natural light of the led dimmer working environment includes: the illumination intensity of the led dimmer surface is obtained and marked as GQ, and the illumination intensity GQ is compared with illumination thresholds GQmax and GQmin:
if GQ is less than or equal to GQmin, the light detection module sends a light supplementing signal and a current detection signal to the dimming processor;
If GQmin is smaller than GQ and smaller than GQmax, the light detection module sends a light supplementing signal to the dimming processor;
If GQ is more than or equal to GQmax, the light detection module sends a lamp-closing signal to the dimming processor;
Acquiring the illumination intensity of the led dimmer when the led dimmer works on the previous day, marking the initial environmental coefficient of the period i as GQic, marking the end environmental coefficient of the period i as GQiz, obtaining the light intensity difference GQi of the period i through a formula GQi = | GQiz-GQic |, and marking the period with the maximum value of the light intensity difference GQi as a light intensity fluctuation period; acquiring all light intensity fluctuation time periods within nearly thirty days, marking three time periods marked as the light intensity fluctuation time periods with the largest frequency as light intensity early warning time periods, marking the average illumination intensity of the light intensity early warning time periods as GQp, and matching the environment early warning time periods with the light intensity early warning time periods: the light detection module sends the current detection period to the dimming processor, and the dimming processor sends the current detection period to the current detection module after receiving the current detection period.
Further, the matching process of the environment early warning period and the light intensity early warning period comprises the following steps: if the environment early-warning period is completely matched with the light intensity early-warning period, marking the environment early-warning period or the light intensity early-warning period as a current detection period; if one or two periods in the environment early-warning period are matched with the light intensity early-warning period, marking the period matched with the environment early-warning period and the light intensity early-warning period as a current detection period; if the environment early-warning period and the light intensity early-warning period are not matched, the environment early-warning period and the light intensity early-warning period with the largest marked times are marked as current detection periods.
Further, the current safety detection process of the led dimmer includes: the method comprises the steps of obtaining a current maximum value DLd and a current minimum value DLx of a led dimmer control circuit in a current detection period, and comparing the current maximum value DLd and the current minimum value DLx with current threshold values DLmax and DLmin respectively: if DLd is more than or equal to DLmax, judging that the current of the LED dimmer control circuit is unsafe; if DLx is less than or equal to DLmin, determining that the LED dimmer control circuit is insufficient in power supply; if DLd is less than Dlmax and DLx is more than DLmin, carrying out transformation analysis on the led control circuit;
The transformation analysis process comprises the following steps: and obtaining a time difference SC of the current reaching the maximum value and the minimum value of the current of the control circuit, obtaining a power transformation rate BD of the current detection period through a formula BD= (DLd-DLx)/SC, comparing the power transformation rate BD with power transformation thresholds BDmin and BDmax, and judging whether the current is normal or not through a comparison result.
Further, the comparison process of the transformation ratio BD and the transformation threshold BDmin, BDmax includes:
if BD is more than or equal to BDmax, judging that the current is abnormal, wherein the abnormal level of the current is one level, and the current detection module sends a one-level abnormal signal to the dimming processor;
If BDmin is less than BD and less than BDmax, judging that the current is abnormal, and the abnormal level of the current is two-level, and sending a two-level abnormal signal to the dimming processor by the current detection module;
if BD is less than or equal to BDmin, judging that the current is normal, and sending a current normal signal to the dimming processor by the current detection module.
Further, the early warning analysis process of the remaining life of the led dimmer comprises the following steps:
Obtaining a life coefficient SM of the led dimmer through a formula SM=t1× HJp +t2× GQp, wherein t1 and t2 are both proportional coefficients, and the values of t1 and t2 are judged by the comparison result of the environmental influence value and the light intensity influence value;
Comparing the life factor SM of the led dimmer with a life threshold SMmax: if the life coefficient SM is smaller than the life threshold SMmax, judging that the led dimmer operates normally; if the life coefficient SM is greater than or equal to the life threshold SMmax, the led dimmer is judged to be abnormal in operation, and the life early-warning module sends a life early-warning signal to the dimming processor.
Further, the value determining process of the scaling coefficients t1 and t2 includes: the method comprises the steps of marking the quantity of environment early warning periods and light intensity early warning periods with first-class abnormality levels in nearly thirty days as HY1 and GY1 respectively, marking the quantity of environment early warning periods and light intensity early warning periods with second-class abnormality levels in nearly thirty days as HY2 and GY2 respectively, and respectively obtaining an environment influence value HX and a light intensity influence value GX through formulas HX=β1xHY1+β2xHY2 and GX=β1xHY1+β2xHY2, wherein β1 and β2 are proportionality coefficients, and β1 > β2 > 0;
comparing the environmental impact value with the light intensity impact value:
If the environmental impact value HX is greater than the light intensity impact value GX, determining that the environmental impact is an important impact factor of the power transformation rate, t1=1.5, t2=1;
If the environmental impact value HX is smaller than the light intensity impact value GX, determining that the light intensity impact is an important impact factor of the power transformation rate, t1=1, t2=1.5;
if the environmental impact value HX is equal to the light intensity impact value GX, it is determined that both the light intensity impact and the environmental impact are key impact factors of the power transformation ratio, t1=t2=1.25.
The utility model provides a led light modulator based on pulse width modulation, includes the mainboard, the mainboard openly is provided with first display screen, second display screen and manual knob, first display screen is used for showing led light modulator's environmental factor, the second display screen is used for showing led light modulator's illumination intensity, manual knob is used for manual regulation to led light modulator.
The invention has the following beneficial effects:
1. The environment detection module is used for detecting and analyzing the use environment of the led dimmer to obtain an environment coefficient, meanwhile, the environment coefficient difference of each period is obtained, the period with the largest ring coefficient difference value represents the largest change amplitude of the environment coefficient of the environment where the led dimmer is positioned in the period, namely, the possibility that the led has abnormal current of the led dimmer control circuit in the period is highest, and the led dimmer control circuit is preferentially detected in the period when the current of the led dimmer is detected, so that the aim of key investigation in key periods is fulfilled;
2. Detecting and analyzing natural light of the LED dimmer working environment through a light detection module to obtain a light intensity early warning period, judging whether light supplementing treatment is needed or not through a comparison result of illumination intensity and an illumination threshold value, and simultaneously, obtaining a current detection period through matching analysis of the light intensity early warning period and the environment early warning period, wherein the current detection period is the period with the highest risk;
3. The current detection module is used for carrying out current analysis on the current detection period to obtain a power transformation rate, and judging whether the current is normal or not according to a comparison result of the power transformation rate and a power transformation threshold value, so that the running state of the led dimmer is monitored according to a current normal analysis result, and the use safety performance of the led dimmer is ensured;
4. The life early warning module calculates the average illumination intensity and the average environment coefficient to obtain a life coefficient, and early warns the life of the led dimmer in advance according to the comparison result of the life coefficient and the life threshold value, so that the led dimmer can be replaced in time when being near scrapped.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a side view of a structure according to a first embodiment of the present invention;
Fig. 2 is a schematic block diagram of a second embodiment of the present invention.
In the figure: 1. a main board; 2. a first display screen; 3. a second display screen; 4. a manual knob;
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, a led dimmer based on pulse width modulation, which comprises a main board 1, the front of the main board 1 is provided with a first display screen 2, a second display screen 3 and a manual knob 4, the first display screen 2 is used for displaying the environmental coefficient of the led dimmer, the environmental coefficient is obtained by analysis of an environmental detection module, the second display screen 3 is used for displaying the illumination intensity of the led dimmer, the illumination intensity is directly acquired by an illumination sensor, the illumination sensor is a sensor for detecting the illumination intensity, the illumination intensity is simply referred to as illumination, the working principle is that the illumination intensity value is converted into a voltage value, and the manual knob 4 is used for manually adjusting the led dimmer.
Example two
As shown in fig. 2, a led dimming system based on pulse width modulation includes a dimming processor, where the dimming processor is communicatively connected with an environment detection module, a light detection module, a current detection module, and a lifetime early warning module;
The environment detection module is used for detecting and analyzing the use environment of the led dimmer through temperature data and humidity data, wherein the temperature data is an air temperature value of the use environment of the led dimmer, the air temperature value is directly acquired by a temperature sensor, the temperature sensor is a sensor capable of sensing temperature and converting the temperature into an available output signal, the temperature sensor is a core part of a temperature measuring instrument and is divided into two types of thermal resistors and thermocouples according to the characteristics of sensor materials and electronic elements, the humidity data is an air humidity value of the use environment of the led dimmer, the air humidity value is directly acquired by a humidity sensor, the humidity sensor is an instrument capable of converting a humidity signal into a voltage signal, the humidity sensor is widely used at present, the humidity sensor can well monitor the humidity in the environment, and the environment detection module has important application in the aspects of food protection, environment detection and the like, and the specific environment detection process comprises: acquiring an air temperature value of an environment where the led dimmer is used and marking the air temperature value as KW, and acquiring an air humidity value of the environment where the led dimmer is used and marking the air humidity value as KS, through a formula Obtaining an environment coefficient HJ of the led dimmer, wherein the environment coefficient HJ is a numerical value for reflecting the suitability of the working environment of the led dimmer, and the lower the numerical value of the environment coefficient HJ is, the higher the suitability of the working environment of the led dimmer is; wherein, alpha 1 and alpha 2 are both proportional coefficients, and alpha 1 is more than alpha 2 is more than 0; acquiring an environmental coefficient of the led dimmer when the led dimmer works on the previous day, dividing the working time of the led dimmer on the previous day into time periods i, i=1, 2, …, n, marking the initial environmental coefficient of the time period i as HJic, marking the end environmental coefficient of the time period i as HJiz, and obtaining a ring system difference HCi of the time period i through a formula HCi= | HJiz-HJic |, wherein the ring system difference HCi is a numerical value representing the variation amplitude of the environmental coefficient in the time period, and the larger the numerical value of the ring system difference is, the larger the variation amplitude of the environmental coefficient in the corresponding time period is; marking the period with the largest ring system difference HCi value as an environment fluctuation period; acquiring all environment fluctuation time periods within nearly thirty days, marking three time periods marked as the environment fluctuation time periods with the largest frequency as environment early warning time periods, marking the average environment coefficient of the environment early warning time periods as HJp, sending the environment early warning time periods to a dimming processor by an environment detection module, and sending the environment early warning time periods to a light detection module after the environment early warning time periods are received by the dimming processor.
The light detection module is used for detecting and analyzing natural light of the led dimmer working environment, and the detection and analysis process of the natural light comprises the following steps: the illumination intensity of the led dimmer surface is obtained and marked as GQ, and the illumination intensity GQ is compared with illumination thresholds GQmax and GQmin:
if GQ is less than or equal to GQmin, the light detection module sends a light supplementing signal and a current detection signal to the dimming processor;
If GQmin is smaller than GQ and smaller than GQmax, the light detection module sends a light supplementing signal to the dimming processor;
if GQ is more than or equal to GQmax, the light detection module sends a lamp-closing signal to the dimming processor.
Acquiring the illumination intensity of the led dimmer when the led dimmer works on the previous day, marking the initial environmental coefficient of the period i as GQic, marking the end environmental coefficient of the period i as GQiz, obtaining the light intensity difference GQi of the period i through a formula GQi = | GQiz-GQic |, and marking the period with the maximum value of the light intensity difference GQi as a light intensity fluctuation period; acquiring all light intensity fluctuation time periods within nearly thirty days, marking three time periods marked as the light intensity fluctuation time periods with the largest frequency as light intensity early warning time periods, marking the average illumination intensity of the light intensity early warning time periods as GQp, and matching the environment early warning time periods with the light intensity early warning time periods: if the environment early-warning period is completely matched with the light intensity early-warning period, marking the environment early-warning period or the light intensity early-warning period as a current detection period; if one or two periods in the environment early-warning period are matched with the light intensity early-warning period, marking the period matched with the environment early-warning period and the light intensity early-warning period as a current detection period; if the environment early-warning period and the light intensity early-warning period are not matched, marking the environment early-warning period and the light intensity early-warning period with the most marked times as current detection periods; the light detection module sends the current detection period to the dimming processor, and the dimming processor sends the current detection period to the current detection module after receiving the current detection period.
The current detection module detects and analyzes the current safety of the led dimmer in the current detection period after receiving the current detection period, and the current safety detection process of the led dimmer comprises the following steps: the method comprises the steps of obtaining a current maximum value DLd and a current minimum value DLx of a led dimmer control circuit in a current detection period, and comparing the current maximum value DLd and the current minimum value DLx with current threshold values DLmax and DLmin respectively: if DLd is more than or equal to DLmax, judging that the current of the LED dimmer control circuit is unsafe; if DLx is less than or equal to DLmin, determining that the LED dimmer control circuit is insufficient in power supply; if DLd is less than Dlmax and DLx is more than DLmin, carrying out transformation analysis on the led control circuit;
the transformation analysis process comprises the following steps: obtaining a time difference SC between a current maximum value and a current minimum value of a control circuit, obtaining a power transformation rate BD of a current detection period through a formula BD= (DLd-DLx)/SC, wherein the power transformation rate BD is a value representing the current change amplitude, the higher the value of the power transformation rate is, the larger the change amplitude of the current in a corresponding period is, the lower the working safety of the led dimmer in the corresponding period is, and comparing the power transformation rate BD with power transformation thresholds BDmin and BDmax:
if BD is more than or equal to BDmax, judging that the current is abnormal, wherein the abnormal level of the current is one level, and the current detection module sends a one-level abnormal signal to the dimming processor;
If BDmin is less than BD and less than BDmax, judging that the current is abnormal, and the abnormal level of the current is two-level, and sending a two-level abnormal signal to the dimming processor by the current detection module;
if BD is less than or equal to BDmin, judging that the current is normal, and sending a current normal signal to the dimming processor by the current detection module.
The method comprises the steps of marking the quantity of environment early warning periods and light intensity early warning periods with first-class abnormality levels in nearly thirty days as HY1 and GY1 respectively, marking the quantity of environment early warning periods and light intensity early warning periods with second-class abnormality levels in nearly thirty days as HY2 and GY2 respectively, and respectively obtaining an environment influence value HX and a light intensity influence value GX through formulas HX=β1xHY1+β2xHY2 and GX=β1xHY1+β2xHY2, wherein the environment influence value and the light intensity influence value respectively represent the influence degree of environment conversion and illumination intensity switching on the current stability of a led dimmer control circuit, wherein both β1 and β2 are proportionality coefficients, and β1 > β2 > 0;
comparing the environmental impact value with the light intensity impact value:
If the environmental impact value HX is greater than the light intensity impact value GX, determining that the environmental impact is an important impact factor of the power transformation rate, t1=1.5, t2=1;
If the environmental impact value HX is smaller than the light intensity impact value GX, determining that the light intensity impact is an important impact factor of the power transformation rate, t1=1, t2=1.5;
if the environmental impact value HX is equal to the light intensity impact value GX, it is determined that both the light intensity impact and the environmental impact are key impact factors of the power transformation ratio, t1=t2=1.25.
The life early warning module is used for carrying out early warning analysis on the residual life of the led dimmer, and the early warning analysis process of the residual life of the led dimmer comprises the following steps:
Obtaining a life coefficient SM of the led dimmer through a formula SM=t1× HJp +t2× GQp, wherein t1 and t2 are both proportional coefficients, and the values of t1 and t2 are judged by the comparison result of the environmental influence value and the light intensity influence value;
Comparing the life factor SM of the led dimmer with a life threshold SMmax: if the life coefficient SM is smaller than the life threshold SMmax, judging that the led dimmer operates normally; if the life coefficient SM is greater than or equal to the life threshold SMmax, the led dimmer is judged to be abnormal in operation, and the life early-warning module sends a life early-warning signal to the dimming processor.
When the LED dimming system based on pulse width modulation works, an environment detection module is adopted to detect and analyze the use environment of the LED dimmer to obtain an environment early warning period, and the early warning period is sent to a light detection module through a dimming processor; detecting and analyzing natural light of the LED dimmer working environment by adopting a light detection module to obtain a light intensity early warning period, matching the environment early warning period with the light intensity early warning period, and obtaining a current detection period through a matching result; the current detection module detects and analyzes the current safety of the led dimmer in a current detection period to judge whether the current of the led dimmer control circuit is normal or not; and adopting a life early-warning module to perform early-warning analysis on the residual life of the led dimmer.
The foregoing is merely illustrative of the structures of this invention and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the invention or from the scope of the invention as defined in the accompanying claims.
The formulas are all formulas obtained by collecting a large amount of data for software simulation and selecting a formula close to a true value, and coefficients in the formulas are set by a person skilled in the art according to actual conditions; such as: formula (VI)Collecting a plurality of groups of sample data by a person skilled in the art and setting a corresponding environmental coefficient for each group of sample data; substituting the set environmental coefficient and the acquired sample data into a formula, forming a binary one-time equation set by any two formulas, screening the calculated coefficient and taking an average value to obtain values of alpha 1 and alpha 2 of 2.54 and 1.78 respectively;
The size of the coefficient is a specific numerical value obtained by quantizing each parameter, so that the subsequent comparison is convenient, and the size of the coefficient depends on the number of sample data and the corresponding environment coefficient is preliminarily set for each group of sample data by a person skilled in the art; as long as the proportional relation between the parameter and the quantized value is not affected, for example, the environmental coefficient is directly proportional to the value of the temperature value.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (5)
1. The led dimming system based on pulse width modulation comprises a dimming processor, and is characterized in that the dimming processor is in communication connection with an environment detection module, a light detection module, a current detection module and a life early warning module;
The environment detection module is used for detecting and analyzing the use environment of the led dimmer to obtain an environment early warning period and sending the early warning period to the light detection module through the dimming processor;
The light detection module is used for detecting and analyzing natural light of the LED dimmer working environment to obtain a light intensity early warning period, matching the environment early warning period with the light intensity early warning period and obtaining a current detection period through a matching result;
The current detection module detects and analyzes the current safety of the led dimmer in a current detection period to judge whether the current of the led dimmer control circuit is normal or not;
the life early warning module is used for carrying out early warning analysis on the residual life of the led dimmer;
the specific process of environment detection comprises the following steps: acquiring an air temperature value of an environment where the led dimmer is used and marking the air temperature value as KW, and acquiring an air humidity value of the environment where the led dimmer is used and marking the air humidity value as KS, through a formula Obtaining an environmental coefficient HJ of the led dimmer, wherein alpha 1 and alpha 2 are proportionality coefficients, and alpha 1 is more than alpha 2 is more than 0; acquiring an environmental coefficient of the led dimmer when the led dimmer works on the previous day, dividing the working time of the led dimmer on the previous day into time periods i, i=1, 2, …, n, marking the initial environmental coefficient of the time period i as HJic, marking the end environmental coefficient of the time period i as HJiz, obtaining a ring system difference HCi of the time period i through a formula HCi= | HJiz-HJic |, and marking the time period with the largest value of the ring system difference HCi as an environmental fluctuation time period; acquiring all environment fluctuation time periods within nearly thirty days, marking three time periods marked as the most times of the environment fluctuation time periods as environment early warning time periods, and marking the average environment coefficient of the environment early warning time periods as HJp;
The specific process for detecting the natural light of the led dimmer working environment comprises the following steps: the illumination intensity of the led dimmer surface is obtained and marked as GQ, and the illumination intensity GQ is compared with illumination thresholds GQmax and GQmin:
if GQ is less than or equal to GQmin, the light detection module sends a light supplementing signal and a current detection signal to the dimming processor;
If GQmin is smaller than GQ and smaller than GQmax, the light detection module sends a light supplementing signal to the dimming processor;
If GQ is more than or equal to GQmax, the light detection module sends a lamp-closing signal to the dimming processor;
acquiring the illumination intensity of the led dimmer when the led dimmer works on the previous day, marking the initial environmental coefficient of the period i as GQic, marking the end environmental coefficient of the period i as GQiz, obtaining the light intensity difference GQi of the period i through a formula GQi = | GQiz-GQic |, and marking the period with the maximum value of the light intensity difference GQi as a light intensity fluctuation period; acquiring all light intensity fluctuation time periods within nearly thirty days, marking three time periods marked as the light intensity fluctuation time periods with the largest frequency as light intensity early warning time periods, marking the average illumination intensity of the light intensity early warning time periods as GQp, and matching the environment early warning time periods with the light intensity early warning time periods: the light detection module sends the current detection period to the dimming processor, and the dimming processor sends the current detection period to the current detection module after receiving the current detection period;
The matching process of the environment early warning period and the light intensity early warning period comprises the following steps: if the environment early-warning period is completely matched with the light intensity early-warning period, marking the environment early-warning period or the light intensity early-warning period as a current detection period; if one or two periods in the environment early-warning period are matched with the light intensity early-warning period, marking the period matched with the environment early-warning period and the light intensity early-warning period as a current detection period; if the environment early-warning period and the light intensity early-warning period are not matched, the environment early-warning period and the light intensity early-warning period with the largest marked times are marked as current detection periods.
2. The led dimming system based on pulse width modulation of claim 1, wherein the led dimmer current safety detection process comprises: the method comprises the steps of obtaining a current maximum value DLd and a current minimum value DLx of a led dimmer control circuit in a current detection period, and comparing the current maximum value DLd and the current minimum value DLx with current threshold values DLmax and DLmin respectively: if DLd is more than or equal to DLmax, judging that the current of the LED dimmer control circuit is unsafe; if DLx is less than or equal to DLmin, determining that the LED dimmer control circuit is insufficient in power supply; if DLd is less than Dlmax and DLx is more than DLmin, carrying out transformation analysis on the led control circuit;
The transformation analysis process comprises the following steps: and obtaining a time difference SC of the current reaching the maximum value and the minimum value of the current of the control circuit, obtaining a power transformation rate BD of the current detection period through a formula BD= (DLd-DLx)/SC, comparing the power transformation rate BD with power transformation thresholds BDmin and BDmax, and judging whether the current is normal or not through a comparison result.
3. The led dimming system based on pulse width modulation as set forth in claim 2, wherein the comparison process of the transformation ratio BD and the transformation threshold values BDmin, BDmax comprises:
if BD is more than or equal to BDmax, judging that the current is abnormal, wherein the abnormal level of the current is one level, and the current detection module sends a one-level abnormal signal to the dimming processor;
If BDmin is less than BD and less than BDmax, judging that the current is abnormal, and the abnormal level of the current is two-level, and sending a two-level abnormal signal to the dimming processor by the current detection module;
if BD is less than or equal to BDmin, judging that the current is normal, and sending a current normal signal to the dimming processor by the current detection module.
4. A led dimming system based on pulse width modulation as claimed in claim 3, wherein the early warning analysis process of the remaining lifetime of the led dimmer comprises:
Obtaining a life coefficient SM of the led dimmer through a formula SM=t1× HJp +t2× GQp, wherein t1 and t2 are both proportional coefficients, and the values of t1 and t2 are judged by the comparison result of the environmental influence value and the light intensity influence value;
Comparing the life factor SM of the led dimmer with a life threshold SMmax: if the life coefficient SM is smaller than the life threshold SMmax, judging that the led dimmer operates normally; if the life coefficient SM is greater than or equal to the life threshold SMmax, the led dimmer is judged to be abnormal in operation, and the life early-warning module sends a life early-warning signal to the dimming processor.
5. The led dimming system based on pwm according to claim 4, wherein the scaling coefficients t1 and t2 are determined by: the method comprises the steps of marking the quantity of environment early warning periods and light intensity early warning periods with first-class abnormality levels in nearly thirty days as HY1 and GY1 respectively, marking the quantity of environment early warning periods and light intensity early warning periods with second-class abnormality levels in nearly thirty days as HY2 and GY2 respectively, and respectively obtaining an environment influence value HX and a light intensity influence value GX through formulas HX=β1xHY1+β2xHY2 and GX=β1xHY1+β2xHY2, wherein β1 and β2 are proportionality coefficients, and β1 > β2 > 0;
comparing the environmental impact value with the light intensity impact value:
If the environmental impact value HX is greater than the light intensity impact value GX, determining that the environmental impact is an important impact factor of the power transformation rate, t1=1.5, t2=1;
If the environmental impact value HX is smaller than the light intensity impact value GX, determining that the light intensity impact is an important impact factor of the power transformation rate, t1=1, t2=1.5;
if the environmental impact value HX is equal to the light intensity impact value GX, it is determined that both the light intensity impact and the environmental impact are key impact factors of the power transformation ratio, t1=t2=1.25.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472238.0A CN114126144B (en) | 2021-12-06 | 2021-12-06 | LED light modulator and dimming system based on pulse width modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472238.0A CN114126144B (en) | 2021-12-06 | 2021-12-06 | LED light modulator and dimming system based on pulse width modulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114126144A CN114126144A (en) | 2022-03-01 |
| CN114126144B true CN114126144B (en) | 2024-05-10 |
Family
ID=80366989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111472238.0A Active CN114126144B (en) | 2021-12-06 | 2021-12-06 | LED light modulator and dimming system based on pulse width modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114126144B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116887495A (en) * | 2023-07-18 | 2023-10-13 | 国能(肇庆)热电有限公司 | Intelligent light control system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204859696U (en) * | 2015-08-13 | 2015-12-09 | 苏州中泽光电科技有限公司 | LED responds to dimming system |
| CN205693934U (en) * | 2016-06-04 | 2016-11-16 | 杭州乐图光电科技有限公司 | A kind of commercial intelligent illuminating system based on WIFI controlled in wireless |
| CN211720780U (en) * | 2019-06-11 | 2020-10-20 | 上海亚明照明有限公司 | Monitoring system for health state of lighting equipment |
| CN112074039A (en) * | 2019-06-11 | 2020-12-11 | 上海亚明照明有限公司 | System, method, terminal and medium for monitoring health state of lighting equipment |
| CN112165749A (en) * | 2020-09-21 | 2021-01-01 | 中车长春轨道客车股份有限公司 | Urban railway train passenger room lamp dimming detection device |
| CN112888110A (en) * | 2021-01-22 | 2021-06-01 | 江苏叶迪车灯股份有限公司 | Step-up and step-down type constant current driver for high-power LED module |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6906502B2 (en) * | 2002-11-14 | 2005-06-14 | Fyre Storm, Inc. | Method for regulating an output voltage of a power coverter |
| US8222832B2 (en) * | 2009-07-14 | 2012-07-17 | Iwatt Inc. | Adaptive dimmer detection and control for LED lamp |
| TW201112872A (en) * | 2009-09-30 | 2011-04-01 | Hui Yang Technology Co Ltd | LED dimming apparatus, circuit and method thereof |
| US10568180B2 (en) * | 2015-05-05 | 2020-02-18 | Arkalumen Inc. | Method and apparatus for controlling a lighting module having a plurality of LED groups |
| TW201740771A (en) * | 2016-05-04 | 2017-11-16 | Idea Pond Llc | Adaptive flashlight control module |
-
2021
- 2021-12-06 CN CN202111472238.0A patent/CN114126144B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204859696U (en) * | 2015-08-13 | 2015-12-09 | 苏州中泽光电科技有限公司 | LED responds to dimming system |
| CN205693934U (en) * | 2016-06-04 | 2016-11-16 | 杭州乐图光电科技有限公司 | A kind of commercial intelligent illuminating system based on WIFI controlled in wireless |
| CN211720780U (en) * | 2019-06-11 | 2020-10-20 | 上海亚明照明有限公司 | Monitoring system for health state of lighting equipment |
| CN112074039A (en) * | 2019-06-11 | 2020-12-11 | 上海亚明照明有限公司 | System, method, terminal and medium for monitoring health state of lighting equipment |
| CN112165749A (en) * | 2020-09-21 | 2021-01-01 | 中车长春轨道客车股份有限公司 | Urban railway train passenger room lamp dimming detection device |
| CN112888110A (en) * | 2021-01-22 | 2021-06-01 | 江苏叶迪车灯股份有限公司 | Step-up and step-down type constant current driver for high-power LED module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114126144A (en) | 2022-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20210231269A1 (en) | Light and Light Sensor | |
| CN103209526B (en) | The method of LED illumination system and control LED illumination system | |
| CN102077691B (en) | Light fitting and control method | |
| US20030234621A1 (en) | Electrical control for an led light source, including dimming control | |
| JP2019537824A (en) | Lighting monitoring | |
| CN102026436B (en) | Led traffic signal with synchronized power pulse circuit | |
| KR101676440B1 (en) | Backlight unit, including plural light sources, driving method thereof, and error detection method thereof | |
| CN103052200B (en) | Lighting Control Assembly and control method thereof | |
| CN104219835B (en) | Driving device and method of LED lighting device | |
| JP2017500714A (en) | Lighting system | |
| CN114126144B (en) | LED light modulator and dimming system based on pulse width modulation | |
| CN102280089A (en) | Light emitting diode (LED) backlight driving method and circuit and liquid crystal display device | |
| US20110285320A1 (en) | Power supply for an airfield led sign | |
| CN202002725U (en) | Equipment for measuring light source parameters | |
| CN105848393A (en) | Fault detection apparatus and method | |
| Khairudin et al. | Development of fuzzy logic control for indoor lighting using leds group | |
| CN109842086A (en) | Arc photosensor self checking method and device, arc protection equipment based on triangular wave driving source | |
| CN118112961A (en) | Intelligent energy-saving control management system for building electrical equipment | |
| CN211720780U (en) | Monitoring system for health state of lighting equipment | |
| Perumal et al. | Measurement, Simulation, and Quantification of Lighting-Space Flicker Risk Levels Using Low-Cost TCS34725 Colour Sensor and IEEE 1789-2015 Standard | |
| CN117310548A (en) | Online detection equipment for service life of lamp | |
| CN205067589U (en) | Cubical switchboard thermote | |
| CN203827591U (en) | Lamp fault detection and illumination monitoring circuit for public lighting facilities | |
| CN102340919A (en) | System and method for detecting fault of LED illumination equipment | |
| TWI804943B (en) | Light device control system, light device controller and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |