CN117858301A

CN117858301A - LED driving circuit, power supply and classroom energy-saving lighting system, method and medium

Info

Publication number: CN117858301A
Application number: CN202410104652.3A
Authority: CN
Inventors: 吴明峰
Original assignee: Rhythm Lighting Technology Zhongshan Co ltd
Current assignee: Rhythm Lighting Technology Zhongshan Co ltd
Priority date: 2024-01-24
Filing date: 2024-01-24
Publication date: 2024-04-09

Abstract

The invention discloses an LED driving circuit, a power supply, a classroom energy-saving lighting system, a method and a medium. According to the embodiment of the invention, the LED driving power supply is integrated in the lamp tube, so that after the lamp tube is in a problem, fault elimination can be completed only by replacing the lamp tube, and compared with the traditional mode that the lamp tube and the driving power supply are arranged separately, the difficulty in installation and maintenance is greatly reduced. The classroom energy-saving illumination method provided by the embodiment of the invention can effectively reduce the energy consumption of the partial illumination lamp in the original natural light illumination sufficient area, thereby greatly saving the energy consumption.

Description

LED driving circuit, power supply and classroom energy-saving lighting system, method and medium

Technical Field

The invention relates to the technical field of energy-saving illumination, in particular to an LED driving circuit, a power supply, a classroom energy-saving illumination system, a classroom energy-saving illumination method and a classroom energy-saving illumination medium.

Background

Along with development of science and technology and economy, lamps in classrooms are updated, at present, an updated product mainly uses LEDs as main light sources, but an existing LED lighting circuit mainly adopts a mode of directly driving the LEDs to emit light by using a direct current power supply, so that self-adaptive adjustment of lighting intensity cannot be well realized, and when mains supply fluctuates, the light emission is easy to fluctuate. In addition, the conventional classroom lighting lamp can generally only illuminate with a single brightness, which is easy to cause great energy waste.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides an LED driving circuit which can realize self-adaptive adjustment and reduce the condition of illumination fluctuation.

The invention also provides an LED driving power supply, a classroom energy-saving lighting system, a classroom energy-saving lighting method and a computer-readable storage medium.

An LED driving circuit according to an embodiment of the first aspect of the present invention includes:

the input end of the input rectifying unit is used for being connected with an illumination alternating current power supply;

a transformer unit having a primary with a first winding, a second winding, and a secondary with a third winding; one end of the first winding is electrically connected with the output end of the input rectifying unit, and the other end of the first winding is electrically connected with the source electrode of the MOS tube; one end of the second winding is electrically connected with the ground wire; one end of the third winding is electrically connected with the ground wire;

the resonance pulse control unit is provided with a driving working voltage end, a driving pulse output end and a feedback signal receiving end; the other end of the second winding is electrically connected with the driving working voltage end through a rectifying and voltage stabilizing circuit; the driving pulse output end is electrically connected with the grid electrode of the MOS tube, and the drain electrode of the MOS tube is electrically connected with the ground wire;

The input end of the output rectifying unit is electrically connected with the other end of the third winding, and the output end of the output rectifying unit is electrically connected with one end of the LED lighting unit;

one end of the sampling resistor is electrically connected with the other end of the LED lighting unit, and the other end of the sampling resistor is electrically connected with the ground wire;

the feedback unit is provided with a feedback input end, a reference voltage end and a feedback output end, wherein the feedback input end is electrically connected with one end of the sampling resistor, the reference voltage end is used for accessing reference voltage, and the feedback output end is electrically connected with the feedback signal receiving end; the resonance pulse control unit is used for adjusting the output state of the driving pulse output end according to the voltage change of one end of the sampling resistor.

The LED driving circuit provided by the embodiment of the invention has at least the following beneficial effects:

the current flowing through the LED lighting unit can be converted into voltage through the sampling resistor, and then the voltage can be fed back through the feedback unit, so that the resonance pulse control unit can adjust the duty ratio of the resonance pulse according to current fluctuation, and therefore larger fluctuation of illumination of the LED lighting unit is avoided.

According to some embodiments of the invention, the feedback unit comprises:

the positive input end of the operational amplification unit is used for being connected with the reference voltage, and the negative input end of the operational amplification unit is electrically connected with one end of the sampling resistor;

and the first input end of the optical coupling module is used for being connected with a second working voltage, the second input end of the optical coupling module is electrically connected with the output end of the operational amplification unit, the first output end of the optical coupling module is electrically connected with the feedback signal receiving end, and the second output end of the optical coupling module is electrically connected with the ground wire.

An LED driving power supply according to an embodiment of the second aspect of the present invention includes:

an LED driving circuit as described above;

the local control unit is respectively and electrically connected with one end of the sampling resistor and the reference voltage end;

and the local carrier communication module is used for carrying out carrier communication with the main controller through an illumination alternating current power line for providing the illumination alternating current power.

The LED driving power supply provided by the embodiment of the invention has at least the following beneficial effects:

the LED driving power supply adopts all the technical schemes of the LED driving circuit of the above embodiment, so that the LED driving power supply has at least all the beneficial effects brought by the technical schemes of the above embodiment. And the voltage value of the reference voltage can be adjusted through the local control unit so as to adjust the illumination intensity of the illumination lamp, and meanwhile, the carrier communication between the local control unit and the main control unit can be realized through the local carrier communication module, so that a foundation can be uniformly regulated and controlled for a plurality of illumination lamps by the main control unit, and the carrier communication mode is adopted without increasing extra wire cost and labor cost.

A classroom energy saving lighting system according to an embodiment of the third aspect of the present invention includes:

each lighting lamp comprises a lamp shade and a lamp tube, wherein the lamp tube comprises a lamp tube shell, the LED lighting units and the LED driving power supply, wherein the LED lighting units and the LED driving power supply are all arranged in the lamp tube shell, and the LED driving power supply is positioned at one side in the lamp tube shell; the lamp tube shell is connected to the lampshade through the power supply clamping terminals at the two ends;

the main control device comprises a power supply voltage detection unit, a voltage-adjustable device, a main control carrier communication module and a main control unit; the input side of the voltage-adjustable device is used for accessing to the mains supply, the output side is used for outputting the illumination alternating current power supply, and the voltage-adjustable device can adjust the power supply voltage value of the illumination alternating current power supply; the power supply voltage detection unit is used for detecting a power supply voltage value of the lighting alternating current power supply; the main control carrier communication module is used for carrying out data interaction with the local carrier communication module in each lighting lamp through the lighting alternating current power line; the main control device is used for adjusting the power supply voltage value of the lighting alternating current power supply output by the voltage-adjustable device according to the power supply voltage value.

The classroom energy-saving lighting system provided by the embodiment of the invention has at least the following beneficial effects:

according to the embodiment of the invention, the LED driving power supply is integrated in the lamp tube, after the lamp has a problem, the fault elimination can be completed only by replacing the lamp tube, compared with the traditional mode that the lamp tube and the driving power supply are arranged separately, the difficulty in installation and maintenance is greatly reduced, the labor cost of installation and maintenance is reduced, the plurality of lamp tubes can realize unified power supply and control through the main control device, and when the voltage of the commercial power is reduced for a long time, the voltage of the lamp tube can be regulated through the voltage regulating device, so that the power supply voltage to the lamp tube is ensured, and the stability of the brightness of the lamp tube during illumination is further ensured.

According to some embodiments of the invention, a first quick-connection structure is arranged on the side surface of the lampshade of each lighting lamp; the classroom energy-saving lighting system further comprises a plurality of CCD camera units, each CCD camera unit is arranged on a multidirectional rotation mounting seat, and each multidirectional rotation mounting seat is mounted on the lampshade through a second quick connection structure and the first quick connection structure; the metal fixing structure at the end part of the lamp tube shell is provided with a communication connection port, and the CCD camera unit is electrically connected with the local control unit in the lamp tube shell through the communication connection port; each CCD camera unit is used for collecting CCD image data of the wall surface or the ground in the teaching room.

According to some embodiments of the invention, the main control device further comprises a display control device electrically connected with the main control unit.

According to a classroom energy-saving lighting method of a fourth aspect of the present invention, which is applied to the classroom energy-saving lighting system described above, a plurality of lighting fixtures are arranged in two dimensions at the top of the classroom, and the fields of view of the CCD camera units mounted on the lighting fixtures located at the periphery are set at an angle obliquely downward toward the wall surface of the classroom, and the fields of view of the CCD camera units mounted on the lighting fixtures located in the middle area are set at an angle in plan view toward the ground of the classroom; the illumination area of each illumination lamp comprises an independent illumination area and an overlapping illumination area overlapped with the adjacent illumination lamp, and the corresponding relation between each independent illumination area and each overlapping illumination area and the field of view of the CCD camera unit is determined;

the classroom energy-saving illumination method comprises the following steps:

responding to an illumination adjustment instruction, continuously acquiring first CCD image data acquired by each CCD camera unit with a visual field facing a classroom wall and second CCD image data acquired by each CCD camera unit with a visual field facing the classroom ground, and determining current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area according to the first CCD image data and the second CCD image data;

Adjusting the illumination power of a plurality of illumination lamps according to the current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area, so that the adjusted current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area is between an illumination intensity preset low threshold and an illumination intensity preset high threshold, and generating an illumination adjustment completion instruction, wherein an eye protection illumination intensity range is arranged between the illumination intensity preset low threshold and the illumination intensity preset high threshold;

stopping acquiring the first CCD image data and the second CCD image data in response to the illumination adjustment completion instruction;

wherein the determining current illumination intensity information corresponding to each of the independent illumination areas and each of the overlapping illumination areas according to the first CCD image data and the second CCD image data includes:

wall surface image extraction is carried out on the first CCD image data so as to obtain wall surface CCD image data;

extracting a ground image from the second CCD image data to obtain ground CCD image data;

determining gray information of a plurality of pieces of wall CCD image data, and determining regional wall illumination intensity data according to the gray information, wherein the regional wall illumination intensity data comprises current illumination intensity information corresponding to each region in the wall CCD image data;

Determining gray information of a plurality of pieces of ground CCD image data, and determining regional ground illumination intensity data according to the gray information, wherein the regional ground illumination intensity data comprises current illumination intensity information corresponding to each region in the ground CCD image data;

and determining the current illumination intensity information corresponding to each independent illumination area and each overlapped illumination area according to the area wall illumination intensity data and the area ground illumination intensity data.

The classroom energy-saving illumination method provided by the embodiment of the invention has at least the following beneficial effects:

the CCD camera unit is used for collecting illumination information, compared with a detection mode of single-point detection photosensitive devices such as a photosensitive diode and a photosensitive resistor, the illumination intensity of a reaction area can be better, objects such as shadows and tables and chairs in CCD image data which are directly collected can be cut, and CCD image data only containing wall surface features or ground features can be used, so that gray information of the wall surface and the ground in a classroom can be accurately determined, current illumination intensity information is further determined, illumination power of illumination lamps corresponding to each illumination area is adjusted, and the current illumination intensity information in the classroom is in an eye protection illumination intensity range. The classroom energy-saving lighting method of the embodiment of the invention directly adjusts the power of the lighting lamp according to the current lighting intensity information in the classroom, and natural light exists in the classroom, so the embodiment of the invention is essentially the application logic of incremental lighting, thereby effectively reducing the energy consumption of the lighting lamp in the area where the natural light is sufficient, and greatly saving the energy consumption. In addition, the camera applied in the embodiment of the invention adopts a quick connection mode, and can be quickly replaced when faults occur or maintenance is needed.

According to some embodiments of the invention, the adjusting the illumination power of the plurality of illumination lamps according to the current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area includes:

if the current illumination intensity information corresponding to the independent illumination area is lower than an illumination intensity preset low threshold or higher than an illumination intensity preset high threshold, adjusting the illumination power of the illumination lamp corresponding to the independent illumination area so that the adjusted current illumination intensity information of the independent illumination area is in the eye-protection illumination intensity range and is close to the middle value of the eye-protection illumination intensity range;

if the current illumination intensity information corresponding to the overlapped illumination areas is lower than the illumination intensity preset low threshold, determining the current illumination intensity information of the independent illumination areas corresponding to each illumination lamp corresponding to the overlapped illumination areas, and increasing the illumination power of each illumination lamp corresponding to the overlapped illumination areas according to the current illumination intensity information, so that the adjusted current illumination intensity information corresponding to the overlapped illumination areas is in the eye protection illumination intensity range;

If the current illumination intensity information corresponding to the overlapped illumination areas is higher than the preset illumination intensity high threshold, determining the current illumination intensity information of the independent illumination areas corresponding to each illumination lamp corresponding to the overlapped illumination areas, and reducing the illumination power of each illumination lamp corresponding to the overlapped illumination areas according to the current illumination intensity information, so that the adjusted current illumination intensity information corresponding to the overlapped illumination areas is in the eye protection illumination intensity range.

According to some embodiments of the invention, the adjusting the illumination power of the illumination lamp corresponding to the independent illumination area includes:

determining a first power adjustment value according to the current illuminance information corresponding to the independent illumination area, a preset illuminance adjustment change curve relationship and an intermediate value of the eye-protection illumination intensity range; the illumination adjustment change curve relation represents a corresponding relation between the power change and the illumination intensity change of the illumination lamp;

and adjusting the illumination power according to the first power adjustment value.

According to some embodiments of the present invention, the adjusting the illumination power of each of the illumination lamps corresponding to the overlapping illumination areas according to the size of the current illumination intensity information includes:

Determining a first power adjustment weight corresponding to each lighting lamp according to current lighting intensity information of an independent lighting area corresponding to each lighting lamp corresponding to the overlapped lighting area;

determining a second power adjustment value according to the current illuminance information corresponding to the overlapped illumination area, the illuminance adjustment change curve relation obtained in advance and the preset low threshold of the illumination intensity;

dividing the second power adjustment value according to the first power adjustment weight corresponding to each lighting lamp to obtain a third power adjustment value corresponding to each lighting lamp corresponding to the overlapped lighting area;

and adjusting the illumination power according to the third power adjustment value corresponding to each illumination lamp.

According to some embodiments of the present invention, the determining the first power adjustment weight corresponding to each lighting fixture according to the current lighting intensity information of the independent lighting area corresponding to each lighting fixture corresponding to the overlapped lighting area includes:

determining a low threshold illuminance difference value between the current illumination intensity information of the independent illumination area corresponding to each illumination lamp corresponding to the overlapped illumination area and the preset illumination intensity low threshold;

And determining a first power adjustment weight corresponding to the lighting lamp according to the plurality of low-threshold illuminance differences.

determining a second power adjustment weight corresponding to each lighting lamp according to the current lighting intensity information of the independent lighting area corresponding to each lighting lamp corresponding to the overlapped lighting area;

determining a fourth power adjustment value according to the current illuminance information corresponding to the overlapped illumination area, the illuminance adjustment change curve relation obtained in advance and the preset low threshold of the illumination intensity;

dividing the third power adjustment value according to the second power adjustment weight corresponding to each lighting lamp to obtain a fifth power adjustment value corresponding to each lighting lamp corresponding to the overlapped lighting area;

and adjusting the illumination power according to the fifth power adjustment value corresponding to each illumination lamp.

According to some embodiments of the present invention, the determining the second power adjustment weight corresponding to each lighting fixture according to the current lighting intensity information of the independent lighting area corresponding to each lighting fixture corresponding to the overlapped lighting area includes:

Determining a high threshold illuminance difference value between the current illumination intensity information of the independent illumination area corresponding to each illumination lamp corresponding to the overlapped illumination area and the preset illumination intensity low threshold;

and determining a second power adjustment weight corresponding to the lighting lamp according to the Gao Menxian illuminance difference values.

According to some embodiments of the invention, the determining the regional wall illumination intensity data according to the gray information includes:

determining regional wall surface illumination intermediate intensity data according to the gray information;

acquiring the included angle information between the CCD camera unit and the wall surface corresponding to the gray information;

and correcting the middle intensity data of the regional wall surface illumination by utilizing the included angle information to obtain the regional wall surface illumination intensity data.

According to some embodiments of the invention, the classroom energy-saving lighting method further comprises:

determining whether personnel information exists through a plurality of the first CCD image data and a plurality of the second CCD image data;

and adjusting the on-off states of a plurality of the lighting lamps according to the personnel information.

According to some embodiments of the invention, the illumination adjustment instruction is generated once every predetermined time of illumination adjustment.

A computer-readable storage medium according to an embodiment of the fifth aspect of the present invention stores computer-executable instructions for performing the classroom energy-saving lighting method as described in the above-described fourth aspect embodiment. The computer readable storage medium adopts all the technical schemes of the classroom energy-saving lighting method of the above embodiments, so that the computer readable storage medium has at least all the beneficial effects brought by the technical schemes of the above embodiments.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a circuit configuration diagram of an LED driving circuit according to an embodiment of the present invention;

FIG. 2 is a system diagram of a classroom energy-saving lighting system provided by an embodiment of the present invention;

fig. 3 is a schematic perspective view of a lighting fixture according to an embodiment of the invention;

fig. 4 is a schematic bottom view of a lighting fixture according to an embodiment of the invention;

fig. 5 is a flowchart of a classroom energy-saving illumination method according to an embodiment of the present invention.

Reference numerals:

an input rectifying unit 110, a transformer unit 120, a resonance pulse control unit 130, an output rectifying unit 140, a feedback unit 150, a local control unit 160, a local carrier communication module 170, a CCD camera unit 180,

A power supply voltage detection unit 210, a voltage-adjustable device 220, a main control carrier communication module 230, a main control unit 240, a display control device 250,

The lamp shade 310, the first quick connection structure 311, the lamp tube 320, the metal fixing structure 321, and the LED lighting unit 330.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, the description of first, second, etc. is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be determined reasonably by a person skilled in the art in combination with the specific content of the technical solution.

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings, in which it is apparent that the embodiments described below are some, but not all embodiments of the invention.

Referring to fig. 1, fig. 1 is a circuit diagram of an LED driving circuit according to an embodiment of the present invention, the LED driving circuit including: an input rectifying unit 110, a transformer unit 120, a resonant pulse control unit 130, an output rectifying unit 140, a sampling resistor and feedback unit 150;

An input rectifying unit 110, the input end of which is used for being connected with an illumination alternating current power supply;

a transformer unit 120 having a primary with a first winding, a second winding, and a secondary with a third winding; one end of the first winding is electrically connected with the output end of the input rectifying unit 110, and the other end of the first winding is electrically connected with the source electrode of the MOS tube; one end of the second winding is electrically connected with the ground wire; one end of the third winding is electrically connected with the ground wire;

the resonance pulse control unit 130 is provided with a driving working voltage end, a driving pulse output end and a feedback signal receiving end; the other end of the second winding is electrically connected with a driving working voltage end through a rectification voltage stabilizing circuit; the driving pulse output end is electrically connected with the grid electrode of the MOS tube, and the drain electrode of the MOS tube is electrically connected with the ground wire;

the output rectifying unit 140, the input end of which is electrically connected with the other end of the third winding, and the output end of which is electrically connected with one end of the LED lighting unit 330;

one end of the sampling resistor is electrically connected with the other end of the LED lighting unit 330, and the other end of the sampling resistor is electrically connected with the ground wire;

the feedback unit 150 is provided with a feedback input end, a reference voltage end and a feedback output end, wherein the feedback input end is electrically connected with one end of the sampling resistor, the reference voltage end is used for accessing reference voltage, and the feedback output end is connected with the feedback signal receiving end; the resonant pulse control unit 130 is configured to adjust an output state of the driving pulse output terminal according to a voltage variation of one end of the sampling resistor.

Referring to fig. 1, the resonant pulse control unit 130 may output a resonant pulse, so that the voltage state of the first winding of the transformer unit 120 may be adjusted to affect the working states of the second winding and the third winding, and the output voltage of the second winding may be rectified and stabilized to be 12V to supply power to the resonant pulse control unit 130, so that the resonant pulse control unit 130 works, and the output voltage of the third winding may be further rectified, and then provide illumination for the LED illumination unit 330. The LED driving circuit of the embodiment of the present invention can convert the current flowing through the LED lighting unit 330 into the voltage through the sampling resistor, and further can perform feedback through the feedback unit 150, so that the resonant pulse control unit 130 can adjust the duty ratio of the resonant pulse according to the current fluctuation, thereby avoiding the occurrence of larger fluctuation of the illumination of the LED lighting unit 330.

In some embodiments, the feedback unit 150 includes an operational amplification unit and an optocoupler module;

the positive input end of the operational amplification unit is used for accessing reference voltage, and the negative input end of the operational amplification unit is electrically connected with one end of the sampling resistor;

The first input end of the optical coupling module is used for being connected with the second working voltage, the second input end of the optical coupling module is electrically connected with the output end of the operational amplification unit, the first output end of the optical coupling module is electrically connected with the feedback signal receiving end, and the second output end of the optical coupling module is electrically connected with the ground wire.

Referring to fig. 1, the current flowing through the sampling resistor is converted into a voltage and then output to the operational amplification unit, and compared with the reference voltage, so that the voltage to be adjusted can be output through the operational amplification unit when the current fluctuates, and further transmitted to the resonant pulse control unit 130 through the optocoupler module, so that the resonant pulse control unit 130 can realize self-adaptive adjustment.

The embodiment of the invention also provides an LED driving power supply, which comprises the LED driving circuit, a local control unit 160 and a local carrier communication module 170; the local control unit 160 is electrically connected with one end of the sampling resistor and the reference voltage end respectively; the local carrier communication module 170 is configured to perform carrier communication with the main controller through an illumination ac power line that provides an illumination ac power.

The LED driving power supply provided by the embodiment of the invention has at least all the beneficial effects brought by the technical scheme of the embodiment because the LED driving power supply adopts all the technical schemes of the LED driving circuit of the embodiment. And the voltage value of the reference voltage can be adjusted through the local control unit 160 so as to adjust the illumination intensity of the illumination lamp, and meanwhile, the carrier communication between the local control unit 160 and the main control unit can be realized through the local carrier communication module 170, so that a foundation can be laid for the main control unit to uniformly regulate and control a plurality of illumination lamps, and an additional wire cost and labor cost are not increased by adopting a carrier communication mode.

As shown in fig. 2, the embodiment of the invention further provides a classroom energy-saving lighting system, which comprises a plurality of lighting fixtures and a main control device;

a plurality of lighting fixtures, each lighting fixture comprising a lamp housing 310 and a lamp tube 320, the lamp tube 320 comprising a lamp tube housing, an LED lighting unit 330 and an LED driving power supply according to claim 3 both disposed in the lamp tube housing, and the LED driving power supply being disposed at one side in the lamp tube housing; the two ends of the lamp tube shell are provided with power clamping terminals, the input end of the input rectifying unit 110 is electrically connected with the power clamping terminals, and the lamp tube shell is clamped into the lamp shade 310 through the power clamping terminals at the two ends;

the main control device comprises a power supply voltage detection unit 210, a voltage-adjustable device 220, a main control carrier communication module 230 and a main control unit 240; the input side of the voltage-adjustable device is used for accessing to the mains supply, the output side is used for outputting the illumination alternating current power supply, and the voltage-adjustable device 220 can adjust the power supply voltage value of the illumination alternating current power supply; the supply voltage detection unit 210 is configured to detect a supply voltage value of the illumination ac power supply; the main control carrier communication module 230 is used for performing data interaction with the local carrier communication module 170 in each lighting fixture through the lighting alternating current power line; the main control device is used for adjusting the power supply voltage value of the lighting alternating current power supply output by the voltage-adjustable device 220 according to the power supply voltage value.

Referring to fig. 4, the lighting lamp adopts an integrated lamp, the LED driving power source is integrally disposed in the lamp tube 320 and is located at one side of the lamp tube 320, two sides of the lamp tube 320 are generally disposed as metal fixing structures 321 to fix the glass part structure of the lamp tube 320, the LED driving power source can be integrally disposed in the metal fixing structures 321, and power clamping terminals are disposed on the end faces of the metal fixing structures 321 at two ends, so that the LED driving power source can be electrically connected with the power clamping seats in the lamp shade 310 through the power clamping terminals, and further the local carrier communication module 170 can realize carrier communication with the master control device through the lighting ac power line.

For the main control device, the power supply voltage detection unit 210 can detect the power supply voltage value of the output side of the voltage regulator 220, so that when the voltage of the output side is reduced for a long time, the voltage can be increased by the voltage regulator 220, and the stability of the power consumption voltage of one side of the lighting lamp is ensured.

According to the lighting lamp provided by the embodiment of the invention, the LED driving power supply is integrated in the lamp tube 320, after a lamp has a problem, fault elimination can be completed only by replacing the lamp tube 320, compared with the traditional mode that the lamp tube 320 and the driving power supply are arranged separately, the difficulty in installation and maintenance is greatly reduced, the labor cost of installation and maintenance is reduced, the multiple lamp tubes 320 can realize unified power supply and control through the main control device, and when the voltage of the commercial power is reduced for a long time, the voltage of the power supply to the lighting lamp can be regulated through the voltage regulating device 220, so that the stability of the brightness of the lamp during lighting is further ensured.

In some embodiments, the voltage-adjustable device 220 may use a transformer with a secondary side capable of adjusting the position, and the voltage adjustment may be accomplished by driving the motor to rotate. It should be noted that, when the mains supply fluctuates slightly, the lighting will not be affected, and if the mains supply is lowered or raised for a long time, the voltage regulation can be completed by the voltage regulator 220.

In some embodiments, the side of the lampshade 310 of each lighting fixture is provided with a first quick-connection structure 311; the classroom energy-saving lighting system further comprises a plurality of CCD camera units 180, wherein each CCD camera unit 180 is arranged on a multidirectional rotation mounting seat, and each multidirectional rotation mounting seat is mounted on the lampshade 310 through a second quick-connection structure and a first quick-connection structure 311; the metal fixing structure 321 at the end part of the lamp tube shell is provided with a communication connection port, and the CCD camera unit 180 is electrically connected with the local control unit 160 in the lamp tube shell through the communication connection port; each of the CCD camera units 180 is used for collecting CCD image data of the wall or floor in the classroom. The CCD image data may be collected by the CCD image unit 180, and the illumination intensity information of the region may be reflected by using the gray information of the CCD image data, and typically, the illumination intensity information and the gray information are in positive correlation. Referring to fig. 3, the ccd camera unit 180 may be quickly fixed on the lighting fixture through the second quick-connection structure and the first quick-connection structure 311, and the viewing direction may be adjusted by rotating the mounting base in multiple directions. The first quick-connect structure 311 may be set as a screw hole on the side of the lamp housing 310, the screw holes may be set as a plurality of screw holes, the second quick-connect structure may be set as a bolt structure, and then the installation position may be changed by changing the screw hole connected by the bolt structure. In addition, in order to facilitate the transmission of the collected CCD image data to the main control device, the metal fixing structure 321 is provided with a communication connection port, and the CCD camera unit 180 may be further connected to the local control unit 160 through the communication connection port after being connected to the communication connection port.

Referring to fig. 2, in some embodiments, the master control apparatus further includes a display control apparatus 250 electrically connected to the master control unit 240. The display control device 250 can be convenient for controlling all lights, and can be used for finding and consulting by related personnel in time after the fault occurs. The display control device 250 can adopt a liquid crystal touch screen or a combined structure of a display and keys.

Referring to fig. 5, the embodiment of the invention further provides a classroom energy-saving lighting method, which comprises the following steps:

in response to the illumination adjustment instruction, continuously acquiring first CCD image data acquired by each CCD camera unit 180 with a visual field facing the wall surface of the classroom and second CCD image data acquired by each CCD camera unit 180 with a visual field facing the ground of the classroom, and determining current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area according to the first CCD image data and the second CCD image data;

adjusting the illumination power of a plurality of illumination lamps according to the current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area, so that the adjusted current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area is between an illumination intensity preset low threshold and an illumination intensity preset high threshold, and generating an illumination adjustment completion instruction, wherein an eye protection illumination intensity range is formed between the illumination intensity preset low threshold and the illumination intensity preset high threshold;

the method for determining the current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area according to the first CCD image data and the second CCD image data comprises the following steps:

determining gray information of the plurality of wall CCD image data, and determining regional wall illumination intensity data according to the gray information, wherein the regional wall illumination intensity data comprises current illumination intensity information of each region in the corresponding wall CCD image data;

determining gray information of the plurality of ground CCD image data, and determining regional ground illumination intensity data according to the gray information, wherein the regional ground illumination intensity data comprises current illumination intensity information corresponding to each region in the ground CCD image data;

and determining the current illumination intensity information corresponding to each independent illumination area and each overlapped illumination area according to the wall illumination intensity data of the plurality of areas and the ground illumination intensity data of the plurality of areas.

In order to better describe the classroom energy-saving lighting method of the embodiment of the invention, an applied classroom energy-saving lighting system is further described, in the classroom energy-saving lighting system of the embodiment, a plurality of lighting lamps are arranged in two dimensions at the top of the classroom, the field of view of the CCD camera unit 180 arranged on the lighting lamps at the periphery is arranged towards the wall surface of the classroom at an angle of oblique downward, and the field of view of the CCD camera unit 180 arranged on the lighting lamps at the middle area is arranged towards the ground of the classroom at an angle of overlook; the illumination area of each illumination fixture includes an independent illumination area and an overlapping illumination area overlapping with an adjacent illumination fixture, and the correspondence of each independent illumination area and each overlapping illumination area to the field of view of the CCD camera unit 180 is determined. When determining the overlapping area, the angle of illumination needs to be considered, and when the angle of illumination is too large, the illumination is attenuated more, so that the influence on the current illumination intensity information in the overlapping area is not considered, and therefore, when determining the illumination intensity information, the overlapping area needs to be determined only by a certain angle and the height of the illumination lamp, for example, only the area of 0 to 30 degrees is considered.

The change of natural light usually does not have abrupt change, so that the illumination intensity of the illumination lamp does not need to be adjusted all the time, and in the embodiment, the illumination adjustment is triggered by adopting a mode of regularly generating illumination adjustment instructions.

After detecting the illumination adjustment instruction, the CCD image pickup unit 180 starts continuously collecting the first CCD image data and the second CCD image data until detecting that the illumination adjustment completion instruction is stopped. After the first CCD image data and the second CCD image data are acquired, the influence of the interference objects is removed from the first CCD image data and the second CCD image data, only the wall surface part and the ground part are intercepted to obtain the wall surface CCD image data and the ground CCD image data, then the gray information of the wall surface CCD image data and the ground CCD image data can be acquired, and the illumination intensity is determined according to the gray information to obtain the current illumination intensity information. After obtaining the current illumination intensity information of all the areas corresponding to the wall surface CCD image data and the ground CCD image data, the corresponding relation between the CCD camera unit 180 and each independent illumination area and each overlapping illumination area can be utilized to determine the current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area, and finally, power adjustment can be performed on each illumination lamp according to the current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area, so that the current illumination intensity information corresponding to each independent illumination area and each overlapping illumination area is in the eye protection illumination intensity range. In addition, the adjustment of the illumination power can be achieved by adjusting the reference voltage of the operational amplification unit.

Compared with a detection mode of single-point detection photosensitive devices such as a photosensitive diode and a photosensitive resistor, the illumination intensity of a reaction area can be better, and objects such as shadows and tables and chairs in directly collected CCD image data can be cut, so that CCD image data only comprising wall features or ground features can be used, gray information of the wall and the ground in a classroom can be accurately determined, current illumination intensity information can be further determined, illumination power of illumination lamps corresponding to each illumination area is adjusted, and the current illumination intensity information in the classroom is in an eye protection illumination intensity range. The classroom energy-saving lighting method of the embodiment of the invention directly adjusts the power of the lighting lamp according to the current lighting intensity information in the classroom, and natural light exists in the classroom, so the embodiment of the invention is essentially the application logic of incremental lighting, thereby effectively reducing the energy consumption of the lighting lamp in the area where the natural light is sufficient, and greatly saving the energy consumption. In addition, the camera applied in the embodiment of the invention adopts a quick connection mode, and can be quickly replaced when faults occur or maintenance is needed.

In some embodiments, adjusting the illumination power of the plurality of illumination fixtures according to the current illumination intensity information corresponding to each independent illumination region and each overlapping illumination region includes:

if the current illumination intensity information corresponding to the independent illumination area is lower than the illumination intensity preset low threshold or higher than the illumination intensity preset high threshold, adjusting the illumination power of the illumination lamp corresponding to the independent illumination area so that the current illumination intensity information of the adjusted independent illumination area is in the eye-protection illumination intensity range and is close to the middle value of the eye-protection illumination intensity range;

if the current illumination intensity information corresponding to the overlapped illumination areas is lower than the illumination intensity preset low threshold, determining the current illumination intensity information of the independent illumination areas corresponding to each illumination lamp corresponding to the overlapped illumination areas, and increasing the illumination power of each illumination lamp corresponding to the overlapped illumination areas according to the size of the current illumination intensity information so that the adjusted current illumination intensity information corresponding to the overlapped illumination areas is in the eye-protection illumination intensity range;

if the current illumination intensity information corresponding to the overlapped illumination areas is higher than the illumination intensity preset high threshold, determining the current illumination intensity information of the independent illumination areas corresponding to each illumination lamp corresponding to the overlapped illumination areas, and reducing the illumination power of each illumination lamp corresponding to the overlapped illumination areas according to the size of the current illumination intensity information so that the adjusted current illumination intensity information corresponding to the overlapped illumination areas is in the eye-protection illumination intensity range.

In actual adjustment, if the independent illumination area needs to be adjusted first, and the current illumination intensity in the independent illumination area is adjusted to be near the middle value of the eye-protection illumination intensity range during adjustment, the adjustment can be stopped. And because each independent illumination area corresponds to one illumination lamp, the adjustment process is extremely fast.

After the adjustment of the independent illumination areas is finished or the adjustment of the independent illumination areas is not needed, if the adjustment of the illumination intensity of the overlapping illumination areas is carried out before the adjustment, the current illumination information of all the independent illumination areas and the overlapping illumination areas needs to be acquired again, and then the adjustment is carried out, in the adjustment process, firstly, whether the illumination intensity range exceeds or is lower than the eye protection illumination intensity range needs to be considered, and for the overlapping illumination areas higher than the eye protection illumination intensity range, the overlapping illumination areas are considered to be obtained by overlapping illumination of a plurality of illumination lamps, therefore, the current illumination intensity information of the independent illumination areas corresponding to each illumination lamp affecting the overlapping illumination areas needs to be determined firstly, the stronger the current illumination intensity information has a larger influence on the overlapping illumination areas, and therefore, more illumination power needs to be adjusted when the adjustment is carried out, the adjustment mode does not have a larger influence on the independent illumination areas with the current illumination intensity information being positioned at the edge of the eye protection illumination intensity range, and therefore, the situation that the independent illumination areas are separated from the eye protection illumination intensity range due to the adjustment of the overlapping areas is avoided; similarly, for the overlapping illumination area lower than the eye-protection illumination intensity range, the overlapping illumination area is obtained by overlapping illumination of a plurality of illumination lamps, so that the current illumination intensity information of the independent illumination area corresponding to each illumination lamp affecting the overlapping illumination area needs to be determined, the lower the current illumination intensity information is, the larger the influence on the overlapping illumination area is, and therefore, when the adjustment is performed, more illumination power needs to be adjusted, in this way, the influence on the independent illumination area of which the current illumination intensity information is at the edge of the eye-protection illumination intensity range is not larger, and the situation that the independent illumination area is separated from the eye-protection illumination intensity range due to adjustment of the overlapping area is avoided.

In some embodiments, adjusting the illumination power of the illumination fixture corresponding to the independent illumination area includes:

determining a first power adjustment value according to current illuminance information corresponding to an independent illumination area, a preset illuminance adjustment change curve relationship and an intermediate value of an eye-protection illumination intensity range; the illumination adjustment change curve relation characterizes the corresponding relation between the power change and the illumination intensity change of the illumination lamp;

When the independent illumination area needs to be adjusted, the intermediate value of the eye-protection illumination intensity range is taken as a target, and the illuminance adjustment change curve relationship is taken as an adjustment basis, so that a first power adjustment value required by adjusting the current illuminance information to the intermediate value of the eye-protection illumination intensity range can be rapidly determined, and illumination power can be directly adjusted according to the first power adjustment value, so that the current illumination intensity information of the illumination lamp is changed to the intermediate value of the eye-protection illumination intensity range. The corresponding relation between the illumination adjustment change curve relation characterizes the illumination lamp power change and the illumination intensity change, and can be obtained by constructing a simulation scene in a factory in advance, wherein the simulation scene mainly is obtained by obtaining the corresponding relation between the illumination intensity change and the lamp power change, so that the corresponding power change can be rapidly determined according to the illumination intensity change, and the illumination power and the current are positively correlated, and therefore, the illumination power can be adjusted by adjusting the reference voltage of the feedback unit 150.

In some embodiments, the step of increasing the illumination power of each illumination lamp corresponding to the overlapping illumination area according to the size of the current illumination intensity information includes:

determining a first power adjustment weight corresponding to each lighting lamp according to the current lighting intensity information of the independent lighting area corresponding to each lighting lamp corresponding to the overlapped lighting area;

determining a second power adjustment value according to current illuminance information corresponding to the overlapped illumination area, a preset illuminance adjustment change curve relationship and an illumination intensity preset low threshold;

When the current illumination information of the overlapped illumination areas is lower than the preset low threshold value of illumination intensity, firstly avoiding illumination influence of each illumination lamp on the independent illumination areas after adjustment, for example, because the illumination intensity of each independent illumination area exceeds the preset high threshold value of illumination intensity due to high power adjustment; therefore, when the illumination intensity is lower than the preset low threshold value, less adjustment is required for the illumination lamps which are more far than the preset low threshold value of the illumination intensity, based on the principle, the first power adjustment weight corresponding to each illumination lamp corresponding to the overlapped illumination area can be determined, meanwhile, the second power adjustment value is determined by utilizing the current illumination information corresponding to the overlapped illumination area, the pre-acquired illumination adjustment change curve relationship and the preset low threshold value of the illumination intensity, the third power adjustment value of each illumination lamp corresponding to the overlapped illumination area can be determined by dividing the second power adjustment value by utilizing the first power adjustment weight, and then, adjustment can be completed by each illumination lamp according to the respective corresponding third power adjustment value.

In some embodiments, determining the first power adjustment weight corresponding to each lighting fixture according to the current lighting intensity information of the independent lighting region corresponding to each lighting fixture corresponding to the overlapping lighting region includes:

determining a low threshold illuminance difference value between the current illumination intensity information of the independent illumination area corresponding to each illumination lamp corresponding to the overlapped illumination area and an illumination intensity preset low threshold;

When the first power adjustment weight is used, in order to basically avoid that the current illumination intensity information of the independent illumination areas corresponding to the single illumination lamp exceeds the illumination intensity preset high threshold, the first power adjustment weight is calculated by using the difference value between the current illumination intensity information of the independent illumination areas and the illumination intensity preset low threshold, and the low threshold illumination difference value which is used as the current illumination intensity information of the independent illumination areas and the illumination intensity preset low threshold is used as a first power adjustment weight redistribution basis, the distribution principle is that the larger the low threshold illumination difference value is, the smaller the first power adjustment weight is distributed, so that the redistribution of the first power adjustment weights of the illumination lamps corresponding to all the independent illumination areas is completed, and therefore, when the illumination intensity of a certain independent illumination area reaches the illumination intensity preset high threshold, any weight is basically not distributed, and the situation that the overlapping illumination areas are regulated to have larger influence on the independent illumination areas is fundamentally avoided. In some embodiments, when the illumination intensity of a certain independent illumination area reaches the preset high threshold of illumination intensity, the corresponding first power adjustment weight may be directly assigned to zero, so that the situation that the preset high threshold of illumination intensity is exceeded is fundamentally avoided.

In some embodiments, reducing the illumination power of each illumination fixture corresponding to the overlapping illumination area according to the size of the current illumination intensity information includes:

determining a fourth power adjustment value according to current illumination information corresponding to the overlapped illumination area, a preset illumination adjustment change curve relation and an illumination intensity preset low threshold;

When the current illumination information of the overlapped illumination areas is higher than the preset high threshold value of illumination intensity, firstly avoiding illumination influence on the independent illumination areas after each illumination lamp is adjusted, for example, because the power is reduced, a certain independent illumination area is lower than the preset low threshold value of illumination intensity; therefore, when the illumination intensity is higher than the preset low threshold value, less adjustment is needed for the illumination lamps which are lower than the preset high threshold value of the illumination intensity, based on the principle, the second power adjustment weight corresponding to each illumination lamp corresponding to the overlapped illumination area can be determined, meanwhile, the fourth power adjustment value is determined by utilizing the current illumination information corresponding to the overlapped illumination area, the preset illumination adjustment change curve relationship and the preset high threshold value of the illumination intensity, the fifth power adjustment value of each illumination lamp corresponding to the overlapped illumination area can be determined by dividing the fourth power adjustment value by utilizing the second power adjustment weight, and then, adjustment can be completed by each illumination lamp according to the corresponding fifth power adjustment value.

In some embodiments, determining the second power adjustment weight corresponding to each lighting fixture according to the current lighting intensity information of the independent lighting region corresponding to each lighting fixture corresponding to the overlapping lighting region includes:

determining a high threshold illuminance difference value between the current illumination intensity information of the independent illumination area corresponding to each illumination lamp corresponding to the overlapped illumination area and an illumination intensity preset low threshold;

and determining a second power adjustment weight corresponding to the lighting lamp according to the plurality of high-threshold illuminance differences.

When the second power adjustment weight is used, in order to basically avoid that the current illumination intensity information of the independent illumination area corresponding to the single illumination lamp is lower than the illumination intensity preset low threshold, the second power adjustment weight is calculated by using the difference value between the current illumination intensity information of the independent illumination area and the illumination intensity preset high threshold, and the difference value between the current illumination intensity information of the independent illumination area and the illumination intensity preset high threshold is used as a second power adjustment weight redistribution basis, the distribution principle is that the larger the high threshold illumination difference value is, the smaller the second power adjustment weight is distributed, so that the redistribution of the second power adjustment weights of the illumination lamps corresponding to all the independent illumination areas is completed, and therefore, when the illumination intensity of a certain independent illumination area reaches the illumination intensity preset low threshold, the weight is basically not distributed, and the situation that the overlapping illumination area is regulated to have larger influence on the independent illumination area is fundamentally avoided. In some embodiments, when the illumination intensity of a certain independent illumination area reaches the preset low threshold of illumination intensity, the corresponding second power adjustment weight may be directly assigned to zero, so that the situation that the illumination intensity is lower than the preset low threshold of illumination intensity is fundamentally avoided.

In some embodiments, determining regional wall illumination intensity data from gray scale information comprises:

acquiring the included angle information between the CCD camera unit 180 and the wall surface corresponding to the gray information;

It should be noted that, the included angle information will affect the gray information, so when there is an included angle between the CCD camera unit 180 and the wall surface, correction is needed by using the included angle information, where the larger the angle represented by the included angle information is, the smaller the illumination intensity corresponding to the same gray is.

In some embodiments, the classroom energy-saving lighting method further comprises:

determining whether personnel information exists through the plurality of first CCD image data and the plurality of second CCD image data;

and adjusting the on-off states of the plurality of lighting fixtures according to the personnel information.

The first CCD image data and the plurality of second CCD image data can be used for directly detecting personnel distribution conditions in classrooms, and under a careful scene, the lighting fixtures of the unmanned area can be extinguished, so that the energy is further saved. The automatic operation may be automatically triggered by inputting a learning time into the main control device. In addition, manual triggering may also be performed by the display control device 250.

In some embodiments, the illumination adjustment instructions are generated once every interval of the illumination adjustment preset time. The natural light change is not abrupt, so the illumination adjustment command may be generated once every interval of illumination adjustment preset time, for example: 1 minute, 10 minutes, etc.

It should be noted that, in the embodiment of the present invention, when the main control unit 240 and the local control unit 160 lose communication, the main control unit may display the CCD image data through the display control device 250 when the main control unit cannot receive the CCD image data. Each LED driving unit may be provided with a unique code so that the main control unit performs the dimming operation and the alarm operation described above.

Furthermore, an embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions that are executed by a processor or a control unit, so that the processor performs the classroom energy-saving lighting method in the above embodiment, for example, performs the method described above.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media or non-transitory media and communication media or transitory media. The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk DVD or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims

1. An LED driving circuit, comprising:

2. An LED driving power supply, comprising:

the LED driving circuit of claim 1;

3. A classroom energy-efficient lighting system, comprising:

a plurality of lighting fixtures, each lighting fixture comprises a lamp shade and a lamp tube, the lamp tube comprises a lamp tube shell, the LED lighting units and the LED driving power supply as set forth in claim 2, which are all arranged in the lamp tube shell, and the LED driving power supply is positioned at one side in the lamp tube shell; the lamp tube shell is connected to the lampshade through the power supply clamping terminals at the two ends;

4. The classroom energy-saving lighting system of claim 3 wherein the side of the lamp housing of each of the lighting fixtures is provided with a first quick-connect structure; the classroom energy-saving lighting system further comprises a plurality of CCD camera units, each CCD camera unit is arranged on a multidirectional rotation mounting seat, and each multidirectional rotation mounting seat is mounted on the lampshade through a second quick connection structure and the first quick connection structure; the metal fixing structure at the end part of the lamp tube shell is provided with a communication connection port, and the CCD camera unit is electrically connected with the local control unit in the lamp tube shell through the communication connection port; each CCD camera unit is used for collecting CCD image data of the wall surface or the ground in the teaching room.

5. A classroom energy-saving lighting method, characterized in that it is applied to the classroom energy-saving lighting system as claimed in claim 4, wherein a plurality of lighting fixtures are arranged in two dimensions at the top of the classroom, and the field of view of the CCD camera unit mounted on the lighting fixtures located at the periphery is set at an angle obliquely downward toward the wall surface of the classroom, and the field of view of the CCD camera unit mounted on the lighting fixtures located in the middle area is set at an angle from the top toward the ground of the classroom; the illumination area of each illumination lamp comprises an independent illumination area and an overlapping illumination area overlapped with the adjacent illumination lamp, and the corresponding relation between each independent illumination area and each overlapping illumination area and the field of view of the CCD camera unit is determined;

the classroom energy-saving illumination method comprises the following steps:

6. The classroom energy-saving lighting method as set forth in claim 5, wherein said adjusting the lighting power of the plurality of lighting fixtures according to the current lighting intensity information corresponding to each of the independent lighting areas and each of the overlapping lighting areas comprises:

7. The classroom energy-saving lighting method as set forth in claim 6, wherein said adjusting the lighting power of the lighting fixtures corresponding to the independent lighting areas comprises:

8. The classroom energy-saving lighting method as set forth in claim 6, wherein said adjusting the lighting power of each of said lighting fixtures corresponding to said overlapping lighting area according to the size of the current lighting intensity information comprises:

9. The classroom energy-saving lighting method as set forth in claim 6, wherein said reducing the lighting power of each of said lighting fixtures corresponding to said overlapping lighting area according to the size of the current lighting intensity information comprises:

10. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the classroom energy-saving lighting method of any one of claims 5-9.