CN117915510B - Control system for constant power output of LED lamp - Google Patents

Abstract

The invention discloses a control system for constant power output of an LED lamp, which relates to the technical field of light control and effectively improves the brightness accuracy of the LED lamp. According to the invention, scene video data of each LED lamp and scene components in an application scene at different moments are collected, a scene three-dimensional image model is built according to the scene video data, the scene three-dimensional image model is divided into a plurality of scene sub-models, further, brightness values on each scene sub-model are obtained by analyzing color values of each model pixel in the scene three-dimensional image model at different moments, a standard brightness value change curve is built and marked on the scene three-dimensional image model, a plurality of illumination periods are set, the illumination periods are divided into a plurality of illumination periods, and further, corresponding lamplight brightness control instructions are generated and executed according to deviation conditions of the brightness values of each real-time scene sub-model in the real-time scene three-dimensional image model and the standard brightness value change curve corresponding to the brightness values.

Description

Control system for constant power output of LED lamp

Technical Field

The invention relates to the technical field of light control, in particular to a control system for constant power output of an LED lamp.

Background

The constant power control of an LED lamp is a technology for controlling the brightness of the LED lamp, which realizes constant power output by controlling the magnitude of current. The brightness of the LED lamp has a certain linear relation with the current, so that the aim of controlling the brightness can be fulfilled by controlling the current of the LED lamp. The principle of constant power control is to adjust the current according to the need to control the brightness under the condition of keeping the power output of the LED lamp constant.

The existing constant power control technology of the LED lamp has the following defects:

Linearity of control: some techniques may result in poor linearity of the brightness adjustment, i.e., the relationship between the adjustment amount and the brightness change is not sufficiently intuitive and accurate. This may result in the user not being able to accurately adjust the desired brightness.

Thermal management problems: because the working temperature of the LED lamp has great influence on the service life and the performance, the heat dissipation problem of the LED lamp needs to be considered during constant power control, and then the too fast working voltage change can cause the too large temperature change amplitude of the lamp bead, so that the lamp bead is invalid or the service life is shortened.

Therefore, it is a difficulty in the prior art to reduce the frequency of the variation of the voltage of the LED lamp while improving the accuracy of the brightness of the LED lamp, and therefore, a control system for constant power output of the LED lamp is provided.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a control system for constant power output of an LED lamp.

In order to achieve the above object, the present invention provides the following technical solutions:

The control system for constant power output of the LED lamp comprises a cloud computing platform, wherein the cloud computing platform is in communication connection with a scene data acquisition module, a scene data analysis module and a control instruction module;

The scene data acquisition module is used for acquiring scene video data of each LED lamp and scene components in the application scene at different moments;

the scene data analysis module is used for building a component three-dimensional image model and an LED (light emitting diode) searchlight three-dimensional image model according to scene video data, building a scene three-dimensional image model by splicing the component three-dimensional image model and the LED searchlight three-dimensional image model, dividing the scene three-dimensional image model into a plurality of scene sub-models, further obtaining brightness values on each scene sub-model by analyzing color values of each model pixel in the scene three-dimensional image model at different moments, and further building a standard brightness value change curve and labeling the standard brightness value change curve on the scene three-dimensional image model;

the control instruction module is used for setting a plurality of illumination periods, dividing the illumination periods into a plurality of illumination periods, and further generating and executing corresponding lamplight brightness control instructions according to the deviation condition of the brightness values of all real-time scene sub-models in the real-time scene three-dimensional image model and the standard brightness value change curves corresponding to the brightness values.

Further, the process for collecting the scene video data comprises the following steps:

the scene data acquisition module sets numbers for all LED lamps in an application scene and numbers for all scene components, divides the time of day into 24 moments, and then sends scene data acquisition instructions to cameras of all the LED lamps when one moment starts, receives scene video data acquired by all the cameras at the last moment, and sets numbers of corresponding LED lamps for all the scene video data.

Further, the process for establishing the assembly three-dimensional image model and the LED searchlighting three-dimensional image model comprises the following steps:

The scene data analysis module divides the scene video data into K pieces of scene image data according to frames, wherein K is a natural number larger than 0;

setting component characteristic points and LED characteristic points, rendering all scene image data through the component characteristic points and the LED characteristic points, and marking corresponding scene component pixels and LED lamp illumination pixels on each scene image data according to rendering results;

Respectively extracting scene component images of all scene components and LED lamp searchlight images of all LED lamps from all scene image data according to the labeling result;

establishing a corresponding component two-dimensional image model and a corresponding searchlight two-dimensional image model according to the scene component image and the LED searchlight image, and labeling numbers corresponding to the scene components and the LED lamps;

carrying out graying treatment on the component two-dimensional image model and the searchlight two-dimensional image model, and further obtaining color values of each model pixel on the component two-dimensional image model and the searchlight two-dimensional image model;

Setting a color value threshold for the component two-dimensional image model, comparing the color value of each model pixel in the component two-dimensional image model with the color value threshold, setting labels for model pixels with the color value greater than or equal to the color value threshold, and performing no operation for model pixels with the color value less than the color value threshold;

Connecting the pixels of the adjacent model with the labels, and further obtaining the appearance outline of the component in the two-dimensional image model of the corresponding component;

Setting a light source color value threshold for a two-dimensional image searchlighting model, comparing the two-dimensional image searchlighting model with the color values of all model pixels, setting labels for the model pixels with the color values larger than or equal to the light source color value, setting a unit range frame, and selecting the position of the model pixel with the label in the unit range frame from all the model pixels in the two-dimensional image searchlighting model through the unit range frame as the light source position of an LED lamp, and connecting the adjacent model pixels with the label to obtain the searchlighting outline in the corresponding two-dimensional image searchlighting model;

the scene data analysis module maps all the two-dimensional image models of all the scene components to each other, so as to establish a corresponding three-dimensional image model of the components, establishes an LED (light emitting diode) searchlighting three-dimensional image model by adopting the same method, and marks corresponding numbers on the three-dimensional image models of the components and the LED searchlighting three-dimensional image model.

Further, the process of building the three-dimensional image model of the scene according to the three-dimensional image model of the assembly and the LED searchlight three-dimensional image model comprises the following steps:

And according to the distribution of each LED lamp and the scene component in the application scene, splicing the LED searchlighting three-dimensional image model and the component three-dimensional image model at the same moment, so as to obtain the scene three-dimensional image model at different moments.

Further, the process of establishing the standard brightness value change curve comprises the following steps:

Dividing a three-dimensional image model of a scene into Num parts of scene sub-models with the same size, further counting color values of all model pixels in each scene sub-model, and recording the counted values as brightness values of the scene sub-models, wherein Num is a natural number larger than 0;

Re-stitching the scene sub-models at each moment to obtain a scene three-dimensional image model marked by brightness values, establishing Num one-dimensional time coordinate systems, and mapping the one-dimensional time coordinate systems on each scene sub-model in the scene three-dimensional image model;

24 time scales are arranged on the one-dimensional time coordinate system, m time sections are arranged between the time scales, and then the brightness value of each scene sub-model is updated along with the change of the time scales on the one-dimensional time coordinate system, and m is a natural number larger than 0;

summarizing a plurality of scene three-dimensional image models with different acquisition time but same time scales, generating a brightness change curve according to brightness value change conditions of scene sub-models at the same positions on each scene three-dimensional image model among the time scales, and establishing a two-dimensional coordinate system;

Mapping all brightness change curves on the same two-dimensional coordinate system, dividing all brightness change curves into a plurality of brightness coordinate points, accumulating brightness values of the brightness coordinate points with the same time coordinate value, taking an average value, marking the average value as a standard brightness value, connecting standard brightness value corresponding coordinate points under each time coordinate value to obtain a standard brightness value change curve between corresponding time scales, and marking the standard brightness value change curve on a corresponding scene three-dimensional image model.

Further, the dividing process of the illumination period includes:

The control instruction module sets 24 illumination periods according to the number of the time scales, divides each illumination period into m illumination periods according to the number of time sections divided among each time scale on the three-dimensional scene image model, marks each illumination period and each illumination period on the corresponding three-dimensional scene image model, and then the scene data analysis module establishes the corresponding three-dimensional real-time scene image model according to the real-time scene video data acquired by the scene data acquisition module, and divides Num real-time scene sub-models in the three-dimensional real-time scene image model.

Further, the process of judging the deviation condition of the brightness value of the real-time scene sub-model and the corresponding standard brightness value change curve comprises the following steps:

Establishing a two-dimensional rectangular coordinate system, generating corresponding real-time coordinates according to the brightness values of the real-time scene sub-model and the corresponding illumination period and time zone, mapping the corresponding standard brightness value change curve on the two-dimensional rectangular coordinate system;

obtaining the distance between the real-time coordinate and the standard brightness value change curve under the same time coordinate value, and setting a positive distance threshold and a negative distance threshold, wherein the positive distance threshold is a positive number, the negative distance threshold is a negative number, and if the distance between the real-time coordinate and the standard brightness value change curve is greater than the positive distance threshold, judging the partial brightness of the corresponding real-time scene sub-model;

if the distance between the real-time coordinates and the standard brightness value change curve is greater than a negative distance threshold, judging that the corresponding real-time scene sub-model is dark;

if the distance between the real-time coordinates and the standard brightness value change curve is greater than or equal to a negative distance threshold and less than or equal to a positive distance threshold, judging the normal of the corresponding real-time scene sub-model;

And further, according to the corresponding component three-dimensional image model in the scene three-dimensional image model of the real-time scene sub-model which is in dark or bright state.

Further, the generating process of the lamplight brightness control instruction comprises the following steps:

Establishing a relation between illumination brightness and voltage of each LED searchlighting three-dimensional image model: l=j×v ⁱ, where L represents the illumination brightness of the LED probe illuminating the three-dimensional image model, V represents the voltage value of the LED lamp, J and i represent the relationship constants, respectively represent the light efficiency and brightness index of the LED lamp;

and then obtaining the voltage relation between the LED searchlighting brightness and the voltage according to the relation between the searchlighting brightness and the voltage of the LED lamps, so that when the brightness value of each scene sub-model is in a standard brightness value change curve, the brightness value of each scene sub-model and the voltage relation of the related LED searchlighting three-dimensional image model are obtained: Where P represents a luminance value, a represents a total number of LED lamps associated with the corresponding scene sub-model, α _a and V _a represent a relationship proportionality constant and a voltage value between the a-th LED lamp and the scene sub-model, respectively, and α _a+…+α_A =1;

for any illumination period, judging whether each part of the corresponding component three-dimensional image model is in dark, bright or normal according to the brightness value of the corresponding scene sub-model of each component three-dimensional image model in the scene three-dimensional image model under the current condition when one illumination period in the illumination period is ended;

Generating corresponding lamplight brightness control instructions according to the current brightness of the LED searchlighting three-dimensional image model associated with each component three-dimensional image model;

summarizing the parts in dark or bright in the component three-dimensional image models related to the LED searchlighting three-dimensional image models, and further calculating the voltage values of the corresponding LED lamps in the next lighting period, wherein the calculation formula is as follows: Wherein P _{Standard of ,a} and P _{Real time ,a} respectively represent the standard brightness value and the real-time brightness value of the related part of the a-th component three-dimensional image model and the corresponding LED lamp, and V _{Instructions for} represents the voltage value of the corresponding LED lamp in the next illumination period;

And generating a light brightness control instruction according to the voltage value of the corresponding LED lamp when V _{Instructions for} represents the next illumination period, marking the number of the LED lamp, and controlling the brightness of the corresponding LED lamp through the light brightness control instruction.

Compared with the prior art, the invention has the beneficial effects that:

1. According to the invention, the scene video data of each LED lamp and each scene component in the application scene at different moments are collected, a scene three-dimensional image model is built according to the scene video data, the scene three-dimensional image model is divided into a plurality of scene sub-models, and further the brightness value on each scene sub-model is obtained by analyzing the color value of each model pixel in the scene three-dimensional image model at different moments, so that a standard brightness value change curve is built, and a data basis is provided for the follow-up judgment of the current condition of each scene component in the real-time application scene;

2. according to the invention, the brightness value of each scene sub-model and the voltage relation of the related LED searchlighting three-dimensional image model are established, and the brightness value in the real-time scene sub-model is substituted into the voltage relation, so that a corresponding lamplight brightness control instruction is generated, the brightness accuracy of the LED lamp is effectively improved, and the change frequency of the voltage of the LED lamp is effectively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application.

Fig. 1 is a schematic diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.

As shown in fig. 1, the control system for constant power output of the LED lamp comprises a cloud computing platform, wherein the cloud computing platform is in communication connection with a scene data acquisition module, a scene data analysis module and a control instruction module;

The scene data acquisition module is used for acquiring scene video data of each LED lamp and scene components in the application scene at different moments;

The scene data analysis module is used for establishing a component three-dimensional image model and an LED (light emitting diode) searchlighting three-dimensional image model according to scene video data, integrating the component three-dimensional image model and the LED searchlighting three-dimensional image model to obtain a scene three-dimensional image model, dividing the scene three-dimensional image model into a plurality of scene sub-models, further obtaining brightness values on each scene sub-model by analyzing color values of each model pixel in the scene three-dimensional image model at different moments, and further establishing a standard brightness value change curve and labeling the standard brightness value change curve on the scene three-dimensional image model;

the control instruction module is used for setting a plurality of illumination periods, dividing the illumination periods into a plurality of illumination periods, and further generating and executing corresponding lamplight brightness control instructions according to the deviation condition of the brightness values of all real-time scene sub-models in the real-time scene three-dimensional image model and the standard brightness value change curves corresponding to the brightness values.

Further, the working principle of the present invention is illustrated by the following examples:

the scene data acquisition module sets a number H ₁、H₂、……、H_n for each LED lamp in the application scene, wherein n is a natural number greater than 0;

the LED lamp is provided with a camera, wherein the shooting range of the camera is the same as the searchlighting range of the LED lamp;

The LED lamps in the application scene are scattered, a plurality of scene components exist in the application scene, and as the searchlighting ranges of the LED lamps are the same, the brightness of any one scene component in the application scene is influenced by a plurality of LED lamps at the same time;

The scene data acquisition module sets a number S ₁、S₂、S₃、……、S_m for each scene component, wherein m is a natural number larger than 0, and divides the time of day into 24 moments, so that each time a moment starts, the scene data acquisition mode sends scene data acquisition instructions to the cameras of each LED lamp, and receives scene video data acquired by each camera at the last moment;

and the scene data acquisition module sets the serial numbers of the corresponding LED lamps for each scene video data and sends all the scene video data to the scene data analysis module.

Further, after receiving the scene video data, the scene data analysis module divides the scene video data into K pieces of scene image data according to frames, wherein K is a natural number larger than 0;

setting component characteristic points and LED characteristic points, rendering all scene image data through the component characteristic points and the LED characteristic points, and marking corresponding scene component pixels and LED lamp illumination pixels on each scene image data according to rendering results;

Respectively extracting scene component images of all scene components and LED lamp searchlight images of all LED lamps from all scene image data according to the labeling result;

It should be noted that, overlapping portions exist between the LED lamp searchlight images of different LED lamps, and the LED lamp searchlight images are connected with the edge positions of the scene component images corresponding to the fields Jing Zujian in the searchlight range;

establishing a corresponding component two-dimensional image model and a corresponding searchlight two-dimensional image model according to the scene component image and the LED searchlight image, and labeling numbers corresponding to the scene components and the LED lamps;

carrying out graying treatment on the component two-dimensional image model and the searchlight two-dimensional image model, and further obtaining color values of each model pixel on the component two-dimensional image model and the searchlight two-dimensional image model;

Setting a color value threshold for the component two-dimensional image model, comparing the color value of each model pixel in the component two-dimensional image model with the color value threshold, setting labels for model pixels with the color value greater than or equal to the color value threshold, and performing no operation for model pixels with the color value less than the color value threshold;

Connecting the pixels of the adjacent model with the labels, and further obtaining the appearance outline of the component in the two-dimensional image model of the corresponding component;

Setting a light source color value threshold for a two-dimensional image searchlighting model, comparing the two-dimensional image searchlighting model with the color values of all model pixels, setting labels for the model pixels with the color values larger than or equal to the light source color value, setting a unit range frame, and selecting the position of the model pixel with the label in the unit range frame from all the model pixels in the two-dimensional image searchlighting model through the unit range frame as the light source position of an LED lamp, and connecting the adjacent model pixels with the label to obtain the searchlighting outline in the corresponding two-dimensional image searchlighting model;

the scene data analysis module maps all the two-dimensional image models of all the scene components to each other, so as to establish a corresponding three-dimensional image model of the components, establishes an LED (light emitting diode) searchlighting three-dimensional image model by adopting the same method, and marks corresponding numbers on the three-dimensional image models of the components and the LED searchlighting three-dimensional image model.

Further, the scene data analysis module is used for splicing the LED searchlight three-dimensional image model and the component three-dimensional image model at the same moment according to the distribution of each LED lamp and each scene component in the application scene, so as to obtain scene three-dimensional image models at different moments;

It should be noted that, because the searchlighting ranges of different LED lamps in the application scene are overlapped in a cross manner, different LED searchlighting three-dimensional image models in the scene three-dimensional image model are overlapped in a cross manner, so that the color values of model pixels in an overlapped state are also overlapped;

Dividing a three-dimensional image model of a scene into Num parts of scene sub-models with the same size, further counting color values of all model pixels in each scene sub-model, and recording the counted values as brightness values of the scene sub-models, wherein Num is a natural number larger than 0;

Re-stitching the scene sub-models at each moment to obtain a scene three-dimensional image model marked by brightness values, establishing Num one-dimensional time coordinate systems, and mapping the one-dimensional time coordinate systems on each scene sub-model in the scene three-dimensional image model;

24 time scales are arranged on the one-dimensional time coordinate system, m time sections are arranged between the time scales, and then the brightness value of each scene sub-model is updated along with the change of the time scales on the one-dimensional time coordinate system, and m is a natural number larger than 0;

summarizing a plurality of scene three-dimensional image models with different acquisition time but same time scales, generating a brightness change curve according to brightness value change conditions of scene sub-models at the same positions on each scene three-dimensional image model among the time scales, and establishing a two-dimensional coordinate system;

Mapping all brightness change curves on the same two-dimensional coordinate system, dividing all brightness change curves into a plurality of brightness coordinate points, accumulating brightness values of the brightness coordinate points with the same time coordinate value, taking an average value, marking the average value as a standard brightness value, connecting standard brightness value corresponding coordinate points under each time coordinate value to obtain a standard brightness value change curve between corresponding time scales, and marking the standard brightness value change curve on a corresponding scene three-dimensional image model.

Further, the scene data analysis module sends the scene three-dimensional image model under each time scale to the control instruction module;

The control instruction module sets 24 illumination periods according to the number of the time scales, divides each illumination period into m illumination periods according to the number of time sections divided among the time scales on the three-dimensional image model of the scene, and marks each illumination period and each illumination period on the corresponding three-dimensional image model of the scene;

the scene data analysis module further adopts a method for establishing a scene three-dimensional image model, establishes a corresponding real-time scene three-dimensional image model according to the real-time scene video data acquired by the scene data acquisition module, and divides Num real-time scene sub-models in the real-time scene three-dimensional image model;

And matching corresponding scene three-dimensional image models according to the illumination period of the real-time scene video data, and matching each scene sub-model in the scene three-dimensional image models with each real-time scene sub-model in the real-time scene three-dimensional image models, so as to judge whether the brightness value of the real-time scene sub-model deviates or not through a standard brightness value change curve in the scene sub-model.

Further, a two-dimensional rectangular coordinate system is established, corresponding real-time coordinates are generated according to the brightness values of the real-time scene sub-model and the corresponding illumination periods and time sections of the real-time scene sub-model and are mapped on the two-dimensional rectangular coordinate system, and meanwhile, corresponding standard brightness value change curves are mapped on the two-dimensional rectangular coordinate system;

Calculating the distance between the real-time coordinate and the standard brightness value change curve under the same time coordinate value, and setting a positive distance threshold and a negative distance threshold, wherein the positive distance threshold is a positive number, and the negative distance threshold is a negative number;

if the distance between the real-time coordinates and the standard brightness value change curve is greater than a positive distance threshold, judging the partial brightness of the corresponding real-time scene sub-model;

if the distance between the real-time coordinates and the standard brightness value change curve is greater than a negative distance threshold, judging that the corresponding real-time scene sub-model is dark;

if the distance between the real-time coordinates and the standard brightness value change curve is greater than or equal to a negative distance threshold and less than or equal to a positive distance threshold, judging the normal of the corresponding real-time scene sub-model;

Furthermore, according to the corresponding component three-dimensional image model in the scene three-dimensional image model of the real-time scene sub-model which is in dark or bright state, it is required to say that for any one real-time scene sub-model, the situation that a plurality of component three-dimensional image models are simultaneously corresponding exists.

Further, establishing a relation between illumination brightness and voltage of each LED probe three-dimensional image model: l=j×v ⁱ, where L represents the illumination brightness of the LED probe illuminating the three-dimensional image model, V represents the voltage value of the LED lamp, J and i represent the relationship constants, respectively represent the light efficiency and brightness index of the LED lamp;

and then obtaining the voltage relation between the LED searchlighting brightness and the voltage according to the relation between the searchlighting brightness and the voltage of the LED lamps, so that when the brightness value of each scene sub-model is in a standard brightness value change curve, the brightness value of each scene sub-model and the voltage relation of the related LED searchlighting three-dimensional image model are obtained: Where P represents a luminance value, a represents a total number of LED lamps associated with the corresponding scene sub-model, α _a and V _a represent a relationship proportionality constant and a voltage value between the a-th LED lamp and the scene sub-model, respectively, and α _a+…+α_A =1;

for any illumination period, judging whether each part of the corresponding component three-dimensional image model is in dark, bright or normal according to the brightness value of the corresponding scene sub-model of each component three-dimensional image model in the scene three-dimensional image model under the current condition when one illumination period in the illumination period is ended;

Generating corresponding lamplight brightness control instructions according to the current brightness of the LED searchlighting three-dimensional image model associated with each component three-dimensional image model;

summarizing the parts in dark or bright in the component three-dimensional image models related to the LED searchlighting three-dimensional image models, and further calculating the voltage values of the corresponding LED lamps in the next lighting period, wherein the calculation formula is as follows: Wherein P _{Standard of ,a} and P _{Real time ,a} respectively represent the standard brightness value and the real-time brightness value of the related part of the a-th component three-dimensional image model and the corresponding LED lamp, and V _{Instructions for} represents the voltage value of the corresponding LED lamp in the next illumination period;

And generating a light brightness control instruction according to the voltage value of the corresponding LED lamp when V _{Instructions for} represents the next illumination period, marking the number of the LED lamp, and controlling the brightness of the corresponding LED lamp through the light brightness control instruction.

The above embodiments are only for illustrating the technical method of the present invention and not for limiting the same, and it should be understood by those skilled in the art that the technical method of the present invention may be modified or substituted without departing from the spirit and scope of the technical method of the present invention.

Claims (6)

1. The control system for the constant power output of the LED lamp comprises a cloud computing platform and is characterized in that the cloud computing platform is in communication connection with a scene data acquisition module, a scene data analysis module and a control instruction module;

The scene data acquisition module is used for acquiring scene video data of each LED lamp and scene components in the application scene at different moments;

The scene data analysis module is used for building a component three-dimensional image model and an LED (light emitting diode) searchlight three-dimensional image model according to scene video data, building a scene three-dimensional image model by splicing the component three-dimensional image model and the LED searchlight three-dimensional image model, dividing the scene three-dimensional image model into a plurality of scene sub-models, obtaining brightness values on each scene sub-model by analyzing color values of each model pixel in the scene three-dimensional image model at different moments, and further building a standard brightness value change curve and labeling the standard brightness value change curve on the scene three-dimensional image model;

the control instruction module is used for setting a plurality of illumination periods, dividing the illumination periods into a plurality of illumination periods, and further generating and executing corresponding lamplight brightness control instructions according to the deviation conditions of the brightness values of all real-time scene sub-models in the real-time scene three-dimensional image model and the standard brightness value change curves corresponding to the brightness values;

the process for judging the deviation condition of the brightness value of the real-time scene sub-model and the corresponding standard brightness value change curve comprises the following steps:

Establishing a two-dimensional rectangular coordinate system, generating corresponding real-time coordinates according to the brightness values of the real-time scene sub-model and the corresponding illumination period and time zone, mapping the corresponding standard brightness value change curve on the two-dimensional rectangular coordinate system;

obtaining the distance between the real-time coordinate and the standard brightness value change curve under the same time coordinate value, and setting a positive distance threshold and a negative distance threshold, wherein the positive distance threshold is a positive number, the negative distance threshold is a negative number, and if the distance between the real-time coordinate and the standard brightness value change curve is greater than the positive distance threshold, judging the partial brightness of the corresponding real-time scene sub-model;

if the distance between the real-time coordinates and the standard brightness value change curve is greater than a negative distance threshold, judging that the corresponding real-time scene sub-model is dark;

if the distance between the real-time coordinates and the standard brightness value change curve is greater than or equal to a negative distance threshold and less than or equal to a positive distance threshold, judging the normal of the corresponding real-time scene sub-model;

Further, according to the corresponding component three-dimensional image model in the scene three-dimensional image model of the real-time scene sub-model which is in dark or bright state;

the generation process of the lamplight brightness control instruction comprises the following steps:

establishing a relation between illumination brightness and voltage of each LED searchlighting three-dimensional image model: Wherein L represents illumination brightness of the LED searchlighting three-dimensional image model, V represents voltage value of the LED lamp, J and i represent relation constants, and respectively represent luminous efficiency and brightness index of the LED lamp;

And then according to the relation between the searchlighting brightness and the voltage of the LED lamp, when the brightness value of each scene sub-model is in a standard brightness value change curve between each time scale, the voltage relation between the brightness value of each scene sub-model and the related LED searchlighting three-dimensional image model is obtained: ; where P represents the luminance value, a represents the total number of LED lamps associated with the corresponding scene sub-model, AndRespectively represent the relation proportionality constant and the voltage value between the a-th LED lamp and the scene sub-model, and；

For any illumination period, judging whether each part of the corresponding component three-dimensional image model is in dark, bright or normal according to the brightness value of the corresponding scene sub-model of each component three-dimensional image model in the scene three-dimensional image model under the current condition when one illumination period in the illumination period is ended;

Generating corresponding lamplight brightness control instructions according to the current brightness of the LED searchlighting three-dimensional image model associated with each component three-dimensional image model;

Summarizing the parts in dark or bright in the component three-dimensional image models related to the LED searchlighting three-dimensional image models, and further calculating the voltage values of the corresponding LED lamps in the next lighting period ，Representing the voltage value of the corresponding LED lamp in the next illumination period;

According to And generating a light brightness control instruction corresponding to the voltage value of the LED lamp when the next illumination period is represented, marking the number of the LED lamp, and controlling the brightness of the corresponding LED lamp through the light brightness control instruction.

2. The system for controlling constant power output of an LED lamp according to claim 1, wherein the process of collecting the scene video data comprises:

The scene data acquisition module sets numbers for all the LED lamps and all the scene components in the application scene, divides the time of day into 24 moments, further sends scene data acquisition instructions to the cameras of all the LED lamps when one moment starts, receives scene video data acquired by all the cameras at the last moment, and sets the numbers of the corresponding LED lamps for all the scene video data.

3. The system for controlling constant power output of an LED lamp according to claim 2, wherein the process for creating the assembly three-dimensional image model and the LED-probe three-dimensional image model comprises:

The scene data analysis module divides the scene video data into K pieces of scene image data according to frames, wherein K is a natural number larger than 0;

setting component characteristic points and LED characteristic points, rendering all scene image data through the component characteristic points and the LED characteristic points, and marking corresponding scene component pixels and LED lamp illumination pixels on each scene image data according to rendering results;

Respectively extracting scene component images of all scene components and LED lamp searchlight images of all LED lamps from all scene image data according to the labeling result;

establishing a corresponding component two-dimensional image model and a corresponding searchlight two-dimensional image model according to the scene component image and the LED searchlight image, and labeling numbers corresponding to the scene components and the LED lamps;

carrying out graying treatment on the component two-dimensional image model and the searchlight two-dimensional image model, and further obtaining color values of each model pixel on the component two-dimensional image model and the searchlight two-dimensional image model;

Setting a color value threshold for the component two-dimensional image model, comparing the color value of each model pixel in the component two-dimensional image model with the color value threshold, setting labels for model pixels with the color value greater than or equal to the color value threshold, and performing no operation for model pixels with the color value less than the color value threshold;

Connecting the pixels of the adjacent model with the labels, and further obtaining the appearance outline of the component in the two-dimensional image model of the corresponding component;

setting a light source color value threshold for a two-dimensional image model to be detected, comparing the two-dimensional image model to color values of all model pixels, setting labels for the model pixels with the color values larger than or equal to the light source color value, setting a unit range frame, traversing all model pixels in the two-dimensional image model to be detected through the unit range frame, further selecting the position of the model pixel with the labels in the unit range frame as the light source position of an LED lamp, and further connecting the adjacent model pixels with the labels to obtain a detection outline in the corresponding two-dimensional image model;

And mapping all the two-dimensional image models of all the scene components to each other, further establishing a corresponding three-dimensional image model of the components, simultaneously establishing an LED (light emitting diode) searchlighting three-dimensional image model by adopting the same method, and labeling corresponding numbers on the three-dimensional image models of the components and the LED searchlighting three-dimensional image model.

4. A control system for constant power output of an LED lamp according to claim 3, wherein the process of building a three-dimensional image model of a scene from said assembly three-dimensional image model and an LED-probe three-dimensional image model comprises:

And according to the distribution of each LED lamp and the scene component in the application scene, splicing the LED searchlighting three-dimensional image model and the component three-dimensional image model at the same moment, so as to obtain the scene three-dimensional image model at different moments.

5. The system for controlling constant power output of an LED lamp according to claim 4, wherein the step of establishing a standard luminance value variation curve comprises:

Dividing a three-dimensional image model of a scene into Num parts of scene sub-models with the same size, further counting color values of all model pixels in each scene sub-model, and recording the counted values as brightness values of the scene sub-models, wherein Num is a natural number larger than 0;

Re-stitching the scene sub-models at each moment to obtain a scene three-dimensional image model marked by brightness values, establishing Num one-dimensional time coordinate systems, and mapping the one-dimensional time coordinate systems on each scene sub-model in the scene three-dimensional image model;

24 time scales are arranged on the one-dimensional time coordinate system, m time sections are arranged between the time scales, and then the brightness value of each scene sub-model is updated along with the change of the time scales on the one-dimensional time coordinate system, and m is a natural number larger than 0;

summarizing a plurality of scene three-dimensional image models with different acquisition time but same time scales, generating a brightness change curve according to brightness value change conditions of scene sub-models at the same positions on each scene three-dimensional image model among the time scales, and establishing a two-dimensional coordinate system;

Mapping all brightness change curves on the same two-dimensional coordinate system, dividing all brightness change curves into a plurality of brightness coordinate points, accumulating brightness values of the brightness coordinate points with the same time coordinate value, taking an average value, marking the average value as a standard brightness value, connecting standard brightness value corresponding coordinate points under each time coordinate value to obtain a standard brightness value change curve between corresponding time scales, and marking the standard brightness value change curve on a corresponding scene three-dimensional image model.

6. The LED lamp constant power output control system of claim 5, wherein said dividing of said illumination period comprises:

The control instruction module sets 24 illumination periods according to the number of the time scales, divides each illumination period into m illumination periods according to the number of time sections divided among each time scale on the three-dimensional scene image model, marks each illumination period and each illumination period on the corresponding three-dimensional scene image model, and then the scene data analysis module establishes the corresponding three-dimensional real-time scene image model according to the real-time scene video data acquired by the scene data acquisition module, and divides Num real-time scene sub-models in the three-dimensional real-time scene image model.