A lighting control method and system for automatically adjusting a lighting range

Abstract

The application discloses a lighting control method and system for automatically adjusting a lighting range, and belongs to the field of lighting management.The lighting control method comprises the following steps: a human infrared sensor is used to collect human infrared signals of a current space environment in real time; a photosensitive sensor is used to collect ambient light intensity of the current space environment in real time; a signal conditioning circuit is used to condition the human infrared signals and the ambient light intensity; a signal control circuit is used to convert the conditioned human infrared signals and the ambient light intensity; and a single-chip microcomputer system is used to receive the converted human infrared signals and the ambient light intensity, output PWM signals with different duty cycles according to the human infrared signals and the ambient light intensity, control the operation of a matrix lamp, and then adjust the brightness of the matrix lamp, so that the lighting range is automatically adjusted.The application can automatically turn off the light when there is no one in the current space environment and automatically turn on the light when there is someone, so that intelligent closed-loop control of the matrix lamp is realized.

Description

Technical Field

[0001] This invention belongs to the field of lighting management technology, specifically relating to a lighting control method and system for automatically adjusting the lighting range. Background Technology

[0002] Currently, there are two main types of control methods for existing matrix lighting fixtures: one is traditional manual switch control, and the other integrates an infrared sensing module into the switch. Although the latter achieves a certain degree of automation, both still rely on the switching mechanism and lack truly intelligent control logic. Regarding brightness adjustment, existing matrix lighting control systems cannot respond to the actual expansion needs of the illuminated area; that is, brightness cannot automatically increase as the illuminated area expands. The only way to increase overall brightness is to add more matrix lighting fixtures. This method of supplementing light by fixture is not only inefficient but also wastes resources and causes uneven illuminance. There is an urgent need to introduce a more intelligent and scalable dimming control scheme to achieve automatic adjustment of the lighting range. Summary of the Invention

[0003] To address the problems existing in the prior art, the present invention provides a lighting control method and system for automatically adjusting the lighting range.

[0004] The technical solution adopted by this invention to solve the technical problem is as follows:

[0005] The present invention provides a lighting control system for automatically adjusting the lighting range, which mainly includes:

[0006] Human infrared sensor, used to collect human infrared signals in the current space environment in real time;

[0007] A photosensitive sensor is used to collect the ambient light intensity of the current space environment in real time.

[0008] Signal conditioning circuitry is used to condition human infrared signals and ambient light intensity;

[0009] The signal control circuit is used to convert the conditioned human infrared signal into ambient light intensity.

[0010] The microcontroller system receives the human infrared signal and ambient light intensity converted by the signal control circuit. Based on the human infrared signal and ambient light intensity, it outputs PWM signals with different duty cycles to control the matrix lamps, thereby adjusting the brightness of the matrix lamps and automatically adjusting the lighting range.

[0011] Furthermore, the system also includes a display screen connected to the microcontroller system, used to display human infrared signals, current ambient brightness, matrix lamp brightness, and matrix lamp color data.

[0012] Furthermore, the system also includes buttons 1, 2, 3, 4, and 5 installed on the display screen; buttons 1, 2, 3, 4, and 5 are respectively used to switch control modes, control the matrix lights to turn on and off, adjust the brightness of the matrix lights, control the matrix lights to turn off at a set time, and control the color change of the LEDs in the matrix lights.

[0013] Pressing the button once activates manual control mode, while pressing the button twice activates automatic control mode.

[0014] Pressing button two once turns on the matrix lights, and pressing button two twice turns off the matrix lights.

[0015] Pressing the button once activates the three-dimensional matrix light fixture at low brightness, pressing the button twice activates the three-dimensional matrix light fixture at medium brightness, and pressing the button three times activates the three-dimensional matrix light fixture at high brightness.

[0016] Pressing the button once sets the matrix lights to automatically turn off after 15 minutes.

[0017] Pressing the button once turns the LEDs in the five-dimensional matrix light fixture white; pressing the button twice turns the LEDs yellow; and pressing the button three times turns the LEDs warm white.

[0018] Furthermore, the matrix lighting fixture consists of multiple LEDs arranged in a rectangular array, each of which is independently controlled; the matrix lighting fixture is provided with multiple independent light-emitting zones, each of which consists of the same type and number of LEDs.

[0019] The present invention provides a lighting control method for automatically adjusting the lighting range, which mainly includes the following steps:

[0020] Step S1: Synchronously collect human infrared signals and ambient light intensity data, process them sequentially through the signal conditioning circuit and the signal control circuit, and then transmit them to the microcontroller system;

[0021] Step S2: The microcontroller system executes the dual-sensor zone closed-loop adaptive control algorithm to realize intelligent closed-loop control of the matrix lamps, automatically adjust the lighting range, and realize that the lamps are on when people are present and off when no one is present.

[0022] Step S3: The system cyclically collects two sensor signals, updates the lighting status of the independent light-emitting zones and the corresponding PWM signal duty cycle in real time, and dynamically adjusts the lighting range and brightness to form a dynamic closed-loop control of signal acquisition, logic operation and lighting adjustment.

[0023] Furthermore, the specific implementation process of the dual-sensor partitioned closed-loop adaptive control algorithm is as follows:

[0024] S201: Execute the anti-shake delay filtering and personnel status judgment algorithm;

[0025] The inputs to the anti-shake delay filtering and judgment algorithm are the human infrared level, the unmanned timer, and the 300-second departure delay threshold, and the output is the indoor person / unmanned sign.

[0026] S202: When a person is detected, execute the matching algorithm between the spatial distribution area of ​​the person and the independent luminous zone. Rely on the human infrared signal to determine the spatial distribution area of ​​the person and match the corresponding independent luminous zone. Change the lighting range by selectively turning on the number of independent luminous zones.

[0027] S203: Execute the ambient light piecewise linear dimming algorithm;

[0028] The duty cycle of the PWM signal is calculated based on the linear mapping relationship between the standardized ambient light intensity value and the duty cycle of the PWM signal. This PWM signal is then used to drive the pre-determined independent light-emitting zones on the matrix lamps to turn on.

[0029] Furthermore, in step S201, after reading the infrared level of the human body, a second sample is taken at a 200ms interval. The person status is only updated when the two sample values ​​are consistent, thus filtering out instantaneous jitter. When there is no one for a continuous period of time, the timer is incremented. After 300 seconds, it is determined that no one is present and the lights are turned off. If less than 300 seconds have passed, the lights remain on. When no one is detected, all PWM channels are set to 0 and the matrix lights are turned off. When someone is detected, the timer is immediately reset and the person is marked as present in the room. The person status is then provided to the matching algorithm between the person spatial distribution area and the independent light-emitting zone.

[0030] Furthermore, in step S203, the light averaging filtering algorithm is first executed, with the input being the photosensitive voltage collected by the photosensitive sensor and the output being the ambient light intensity standardized from 0 to 100.

[0031] Furthermore, in step S203, the automatic mode dual-sensor fusion dimming algorithm is then executed, with the input being the person's status and the standardized ambient light intensity value, and the output being a PWM signal duty cycle of 0~100%.

[0032] Furthermore, the rules for the linear mapping relationship are as follows:

[0033] (1) High light range: L≥5000lux, D=20%, low brightness output;

[0034] (2) Medium illumination range: 1000 lux < L < 5000 lux, D = 100 - L ÷ 50. The stronger the ambient light intensity, the linearly lower the duty cycle of the PWM signal, resulting in medium brightness output.

[0035] (3) Low light range: L≤1000lux, D=90%, high brightness output;

[0036] Where L is the ambient light intensity, in lux; and D is the PWM signal duty cycle, ranging from 0 to 100%.

[0037] The beneficial effects of this invention are:

[0038] The present invention provides a lighting control method and system for automatically adjusting the lighting range, which can automatically turn off the lights when no one is present and automatically turn on the lights when someone is present, based on the human infrared signal and ambient light intensity of the current spatial environment. It can also automatically adjust the lighting range, thereby realizing intelligent closed-loop control of matrix lighting fixtures. Attached Figure Description

[0039] Figure 1 The present invention provides a structural block diagram of a lighting control system for automatically adjusting the lighting range.

[0040] Figure 2 A flowchart of a lighting control method for automatically adjusting the lighting range provided by the present invention.

[0041] In the diagram, the components are: 1. Human infrared sensor; 2. Photosensitive sensor; 3. Signal conditioning circuit; 4. Signal control circuit; 5. Microcontroller system; 6. Display screen; 7. Matrix lamp; 8. Button 1; 9. Button 2; 10. Button 3; 11. Button 4; 12. Button 5. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the accompanying drawings.

[0043] In a first aspect, the present invention provides a lighting control system for automatically adjusting the lighting range.

[0044] like Figure 1 As shown, the present invention provides a lighting control system for automatically adjusting the lighting range, which specifically includes the following modules:

[0045] Human infrared sensor 1, photosensitive sensor 2, signal conditioning circuit 3, signal control circuit 4, microcontroller system 5, display screen 6, matrix lamp 7, button 1 8, button 2 9, button 3 10, button 4 11 and button 5 12.

[0046] Human infrared sensor 1 and photosensitive sensor 2 are respectively connected to signal conditioning circuit 3. Signal conditioning circuit 3 is connected to signal control circuit 4. Signal control circuit 4 is connected to microcontroller system 5. Microcontroller system 5 is connected to display screen 6 and matrix lamp 7. Display screen 6 is equipped with multiple buttons, namely button 1 8, button 2 9, button 3 10, button 4 11 and button 5 12.

[0047] According to the present invention, the human infrared sensor 1 is mainly used to collect human infrared signals in the current spatial environment (such as a classroom) in real time, and send the collected human infrared signals to the signal conditioning circuit 3 for further processing.

[0048] According to the present invention, the photosensitive sensor 2 is mainly used to collect the ambient light intensity of the current spatial environment (such as a classroom) in real time, and send the collected ambient light intensity to the signal conditioning circuit 3 for further processing.

[0049] According to this invention, the signal conditioning circuit 3 mainly consists of three parts: a preamplifier sub-circuit, an RC low-pass filter sub-circuit, and a 3.3V level clamping sub-circuit. The human infrared sensor 1 outputs a weak analog voltage at the millivolt level, which is first sent to the preamplifier sub-circuit to amplify the signal and eliminate noise interference from ambient heat sources and airflow. The two sensor signals (human infrared signal and ambient light intensity) pass through the RC low-pass filter sub-circuit to filter out high-frequency interference and light flicker noise. Finally, the 3.3V level clamping sub-circuit limits the signal amplitude to the standard range of 0~3V. The signal conditioning circuit 3 can amplify, reduce noise, and normalize the original analog signals collected by the human infrared sensor 1 and the photosensitive sensor 2, and output a standard analog signal that is compatible with the back-end signal control circuit 4, preventing signal distortion and sampling deviation, and ensuring signal conversion accuracy.

[0050] According to the present invention, the signal control circuit 4 may specifically be an A / D converter, which is mainly used to convert analog signals into digital signals.

[0051] According to this invention, the microcontroller system 5 can be implemented using an STM32F103C8T chip. The microcontroller system 5 is mainly used to receive the human infrared signal and ambient light intensity processed by the signal control circuit 4, and to determine whether there is anyone in the current spatial environment (such as a classroom) based on the human infrared signal. When someone is detected, the microcontroller system 5 outputs PWM signals with different duty cycles according to the human infrared signal and ambient light intensity to control the matrix lamp 7 to turn on, thereby adjusting the brightness of the matrix lamp 7 to adapt to the light saturation of the human eye. When no one is detected, the matrix lamp 7 is turned off.

[0052] According to the present invention, the display screen 6 may specifically be an OLED display screen, mainly used to display data such as human infrared signals, current ambient brightness, brightness of matrix lamps 7, and color of matrix lamps 7.

[0053] According to the present invention, buttons 8, 9, 10, 11, and 12 are mainly used to switch control modes (automatic control mode / manual control mode), control the turning on and off of the matrix lamp 7, adjust the brightness of the matrix lamp 7, control the timed shutdown of the matrix lamp 7, and control the color change of the LEDs in the matrix lamp 7. Specifically:

[0054] Button 18 is mainly used for switching control modes: pressing button 18 once is manual control mode, and pressing button 18 twice is automatic control mode;

[0055] Button 29 is mainly used for start control: pressing button 29 once turns on matrix lamp 7, and pressing button 29 twice turns off matrix lamp 7;

[0056] Button 3.10 is mainly used for brightness control: pressing button 3.10 once will set matrix lamp 7 to low brightness (30% of total brightness), pressing button 3.10 twice will set matrix lamp 7 to medium brightness (60% of total brightness), and pressing button 3.10 three times will set matrix lamp 7 to high brightness (100% of total brightness).

[0057] Button 4.11 is mainly used for timer control: pressing button 4.11 once sets matrix lamp 7 to automatically turn off after 15 minutes.

[0058] Button 512 is mainly used for light color control: pressing button 512 once turns the LEDs in matrix lamp 7 white, pressing button 512 twice turns the LEDs in matrix lamp 7 yellow, and pressing button 512 three times turns the LEDs in matrix lamp 7 warm white.

[0059] According to the present invention, the matrix lamp 7 can be composed of multiple LEDs arranged in a rectangular array, and each LED can be controlled independently, such as independently adjusting its brightness, turning it on or off, thereby precisely controlling the illumination angle and illumination range of the matrix lamp 7.

[0060] According to the present invention, the matrix lamp 7 is provided with multiple independent light-emitting zones, and each independent light-emitting zone is composed of the same type and the same number of LEDs.

[0061] This invention provides a lighting control system for automatically adjusting the lighting range, mainly including two control modes: automatic control mode and manual control mode. In automatic control mode, the system executes a dual-sensor zone closed-loop adaptive control algorithm to automatically adjust the lighting range. In manual control mode, the system uses buttons 1 (8), 2 (9), 3 (10), 4 (11), and 5 (12) to switch control modes, turn on and off matrix lamps 7, adjust the brightness of matrix lamps 7, time off matrix lamps 7, and control the color change of LEDs in matrix lamps 7. The timed off control process for matrix lamps 7 is as follows: the system combines the timer switch marker, preset duration, and the timing result of the second / minute counter to run a timed off countdown interrupt algorithm. Timing only begins when the timer function is active, incrementing the counter by one for each second. When the accumulated seconds reach 60, the count is incremented by one minute. When the total timing duration reaches the user-set value, the system forcibly turns off all lights, clears all parameters related to the timer, and ends the current timing process.

[0062] Secondly, the present invention provides a lighting control method for automatically adjusting the lighting range.

[0063] This invention provides a lighting control method for automatically adjusting the lighting range, which is mainly applied in automatic control mode. Its core means is to identify the spatial distribution area of ​​people and automatically control multiple independent light-emitting zones on the matrix lamp 7 to selectively turn on or off. By changing the number of independent light-emitting zones turned on, the space covered by the light is changed, thereby realizing automatic adjustment of the lighting range.

[0064] like Figure 2 As shown, this invention provides a lighting control method for automatically adjusting the lighting range. This method achieves automatic adjustment of the lighting range by executing a dual-sensor zoned closed-loop adaptive control algorithm serially at fixed cycles. The device is initialized upon power-up: pin 5 of the microcontroller system, human infrared sensor 1, photosensor 2, signal conditioning circuit 3, signal control circuit 4, display screen 6, two timers, buttons 8, 9, 10, 11, and 12. The default mode is automatic, lights are off, and the timer is reset. The device continuously cycles: sequentially reading human infrared signals, ambient light intensity data, and button operation parameters; sequentially executing anti-shake delay filtering and personnel status judgment algorithms, and ambient light segmented linear dimming algorithms; the two timers interrupt independently run in the background without main loop processing; each cycle refreshes display screen 6 to show all operating parameters, and after a short delay to stabilize, the entire process is repeated. The specific implementation process is as follows:

[0065] Step S1: Synchronously collect human infrared signals and ambient light intensity data, process them sequentially through signal conditioning circuit 3 and signal control circuit 4, and then transmit them to the microcontroller system 5;

[0066] Step S2: The microcontroller system 5 executes the dual-sensor zone closed-loop adaptive control algorithm to realize intelligent closed-loop control of the matrix lamp 7, automatically adjust the lighting range, and realize that the lamp is on when there are people and off when there are no people.

[0067] Specifically, the implementation process of the dual-sensor zoned closed-loop adaptive control algorithm is as follows:

[0068] S201: Execute the anti-shake delay filtering and personnel status judgment algorithm;

[0069] The inputs to the anti-shake delay filtering and judgment algorithm are the human infrared level, the unmanned timer, and the 300-second departure delay threshold. The output is the indoor presence / unmanned sign.

[0070] Specifically, after reading the infrared level of the human body, a second sample is taken at a 200ms interval. The person status is only updated when the two sample values ​​are consistent. Instantaneous jitter is filtered out, i.e., signal interruption caused by the person being still or the human infrared sensor 1 being briefly blocked, to avoid frequent start-stop malfunctions of the matrix light fixture 7. When there is no one for a continuous period of time, the timer is incremented. After 300 seconds, it is determined that no one is present and the light is turned off. If less than 300 seconds have passed, the light remains on. When no one is detected, all PWM channels are set to 0 and the matrix light fixture 7 is turned off. When someone is detected, the timer is immediately reset and the person is marked as present in the room. The person status is then provided to the matching algorithm between the person spatial distribution area and the independent light-emitting zone.

[0071] S202: Algorithm for matching the spatial distribution area of ​​executors with independent light-emitting zones;

[0072] When a person is detected, the algorithm for matching the spatial distribution area of ​​the person with the independent luminous zone is executed. The spatial distribution area of ​​the person is determined by the infrared signal of the human body, and the corresponding independent luminous zone is matched. The illumination range is changed by selectively activating the number of independent luminous zones.

[0073] S203: Execute the ambient light piecewise linear dimming algorithm;

[0074] S2031: Illumination mean filtering algorithm;

[0075] The input to the light averaging filtering algorithm is the photosensitive voltage collected by the photosensitive sensor 2, and the output is the ambient light intensity standardized from 0 to 100.

[0076] Specifically, 8 sets of raw ambient light intensity data were collected at 5ms intervals. The maximum and minimum values ​​were removed, and the average value of the remaining 6 sets was taken. Then, the average value was converted into a 0~100 standardized ambient light intensity value.

[0077] S2032: Automatic mode dual-sensor fusion dimming algorithm;

[0078] The automatic mode dual-sensor fusion dimming algorithm takes the person status (indoor occupied / unoccupied indicator) and standardized ambient light intensity value as input, and outputs a PWM signal duty cycle of 0~100%.

[0079] Specifically, the automatic mode dual-sensor fusion dimming algorithm calculates the PWM signal duty cycle based on the linear mapping relationship between standardized ambient light intensity values ​​and PWM signal duty cycles. This PWM signal is then used to drive the pre-defined independent light-emitting zones on the matrix luminaire 7 to turn on. The specific implementation principle of the linear mapping relationship is as follows:

[0080] Let the ambient light intensity be L (unit: lux) and the PWM signal duty cycle be D (value range: 0~100%). The rules for the linear mapping relationship are as follows:

[0081] (1) High light range: L≥5000lux, D=20%, low brightness output;

[0082] (2) Medium illumination range: 1000 lux < L < 5000 lux, D = 100 - L ÷ 50. The stronger the ambient light intensity, the linearly lower the duty cycle of the PWM signal, resulting in medium brightness output.

[0083] (3) Low light range: L≤1000lux, D=90%, high brightness output.

[0084] S204: Tri-color LED PWM dimming interrupt algorithm;

[0085] A high-frequency dimming waveform is generated based on the duty cycle of the output PWM signal (0-100%) and the color temperature index.

[0086] Specifically, 100 counting units are set as a complete dimming cycle. When the count value is less than the preset duty cycle, the independent light-emitting zone of the corresponding color channel remains lit. The system turns on one of the white light, yellow light or warm white light channels separately according to the color temperature index. The three color channels are controlled independently. The system avoids light flicker by continuously outputting high-frequency dimming waveforms.

[0087] Step S3: The system cyclically collects two sensor signals (human infrared signal and ambient light intensity), updates the lighting status of independent light-emitting zones and the corresponding PWM signal duty cycle in real time, and dynamically adjusts the lighting range and light brightness to form a dynamic closed-loop control of "signal acquisition-logic operation-light adjustment".

[0088] The application scenarios are illustrated below:

[0089] When this invention is applied to a classroom, the matrix lighting fixture 7 is equipped with four independent light-emitting zones: two independent light-emitting zones in the front row and two independent light-emitting zones in the back row. The specific implementation process is as follows:

[0090] The system simultaneously collects infrared signals from human bodies and ambient light intensity within the classroom. When the system detects that only the front row of the classroom is occupied based on the infrared signals, it determines that only the two independent luminous zones in the front row need to be activated. During the day, with natural light (L=6000 lux) and a PWM signal duty cycle (D=20%), this provides low-brightness lighting in a small area. When the system detects activity throughout the entire classroom based on the infrared signals, it determines that all four independent luminous zones need to be activated. In the evening, with natural light (L=600 lux) and a PWM signal duty cycle (D=90%), this provides high-brightness lighting in a large area.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lighting control system for automatically adjusting the lighting range, characterized in that, include: Human infrared sensor, used to collect human infrared signals in the current space environment in real time; A photosensitive sensor is used to collect the ambient light intensity of the current space environment in real time. Signal conditioning circuitry is used to condition human infrared signals and ambient light intensity. The signal control circuit is used to convert the conditioned human infrared signal into ambient light intensity. The microcontroller system receives human infrared signals and ambient light intensity converted by the signal control circuit. Based on the human infrared signals and ambient light intensity, it outputs PWM signals with different duty cycles to control the matrix lamps, thereby adjusting the brightness of the matrix lamps and automatically adjusting the lighting range.

2. The lighting control system for automatically adjusting the lighting range according to claim 1, characterized in that, It also includes a display screen connected to the microcontroller system, used to display human infrared signals, current ambient brightness, matrix lamp brightness, and matrix lamp color data.

3. A lighting control system for automatically adjusting the lighting range according to claim 2, characterized in that, It also includes buttons 1, 2, 3, 4, and 5 installed on the display screen; buttons 1, 2, 3, 4, and 5 are respectively used to switch control modes, control the matrix lights to turn on and off, adjust the brightness of the matrix lights, control the timed shutdown of the matrix lights, and control the color change of the LEDs in the matrix lights; Pressing the button once activates manual control mode, while pressing the button twice activates automatic control mode. Pressing button two once turns on the matrix lights, and pressing button two twice turns off the matrix lights. Pressing the button once activates the three-dimensional matrix light fixture at low brightness, pressing the button twice activates the three-dimensional matrix light fixture at medium brightness, and pressing the button three times activates the three-dimensional matrix light fixture at high brightness. Pressing the button once sets the matrix lights to automatically turn off after 15 minutes. Pressing the button once turns the LEDs in the five-dimensional matrix light fixture white; pressing the button twice turns the LEDs yellow; and pressing the button three times turns the LEDs warm white.

4. A lighting control system for automatically adjusting the lighting range according to claim 1, characterized in that, The matrix lighting fixture consists of multiple LEDs arranged in a rectangular array, each of which is independently controlled; the matrix lighting fixture has multiple independent light-emitting zones, each of which consists of the same type and number of LEDs.

5. A lighting control method for automatically adjusting the lighting range, implemented using a lighting control system for automatically adjusting the lighting range as described in any one of claims 1-4, characterized in that, Includes the following steps: Step S1: Synchronously collect human infrared signals and ambient light intensity data, process them sequentially through the signal conditioning circuit and the signal control circuit, and then transmit them to the microcontroller system; Step S2: The microcontroller system executes the dual-sensor zone closed-loop adaptive control algorithm to realize intelligent closed-loop control of the matrix lamps, automatically adjust the lighting range, and realize that the lamps are on when people are present and off when no one is present. Step S3: The system cyclically collects two sensor signals, updates the lighting status of the independent light-emitting zones and the corresponding PWM signal duty cycle in real time, and dynamically adjusts the lighting range and brightness to form a dynamic closed-loop control of signal acquisition, logic operation and lighting adjustment.

6. The lighting control method for automatically adjusting the lighting range according to claim 5, characterized in that, The specific implementation process of the dual-sensor partitioned closed-loop adaptive control algorithm is as follows: S201: Execute the anti-shake delay filtering and personnel status judgment algorithm; The inputs to the anti-shake delay filtering and judgment algorithm are the human infrared level, the unmanned timer, and the 300-second departure delay threshold, and the output is the indoor person / unmanned sign. S202: When a person is detected, execute the matching algorithm between the spatial distribution area of ​​the person and the independent luminous zone. Rely on the human infrared signal to determine the spatial distribution area of ​​the person and match the corresponding independent luminous zone. Change the lighting range by selectively turning on the number of independent luminous zones. S203: Execute the ambient light piecewise linear dimming algorithm; The duty cycle of the PWM signal is calculated based on the linear mapping relationship between the standardized ambient light intensity value and the duty cycle of the PWM signal. This PWM signal is then used to drive the pre-determined independent light-emitting zones on the matrix lamps to turn on.

7. The lighting control method for automatically adjusting the lighting range according to claim 6, characterized in that, In step S201, after reading the infrared level of the human body, a second sample is taken at a 200ms interval. The person status is only updated when the two sample values ​​are consistent, filtering out instantaneous jitter. When there is no one for a continuous period of time, the timer is incremented. After 300 seconds, it is determined that no one is present and the lights are turned off. If less than 300 seconds have passed, the lights are kept on. When no one is detected, all PWM channels are set to 0 and the matrix lights are turned off. When someone is detected, the timer is immediately reset and someone is marked in the room. The person status is then provided to the matching algorithm between the person spatial distribution area and the independent light-emitting zone.

8. The lighting control method for automatically adjusting the lighting range according to claim 6, characterized in that, In step S203, the average illumination filtering algorithm is first executed. Its input is the photosensitive voltage collected by the photosensitive sensor, and its output is the ambient light intensity standardized from 0 to 100.

9. A lighting control method for automatically adjusting the lighting range according to claim 8, characterized in that, In step S203, the automatic mode dual-sensor fusion dimming algorithm is then executed. Its inputs are the personnel status and the standardized ambient light intensity value, and its output is a PWM signal duty cycle of 0~100%.

10. A lighting control method for automatically adjusting the lighting range according to claim 6, characterized in that, The rules for the linear mapping relationship are as follows: (1) High light range: L≥5000lux, D=20%, low brightness output; (2) Medium illumination range: 1000 lux < L < 5000 lux, D = 100 - L ÷ 50. The stronger the ambient light intensity, the linearly lower the duty cycle of the PWM signal, resulting in medium brightness output. (3) Low light range: L≤1000lux, D=90%, high brightness output; Where L is the ambient light intensity, in lux; and D is the PWM signal duty cycle, ranging from 0 to 100%.

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