CN117479388B - Power supply control system and method for smart city illumination - Google Patents

Abstract

The invention provides a power supply control system and a power supply control method for smart city lighting, wherein a lighting unit, a sensing unit, a switch unit, a power supply unit, a communication unit and a control unit are arranged in a city lighting lamp, the sensing unit comprises a visual sensing unit and a light intensity detection unit and is used for acquiring environment sensing data of the city lighting lamp, a server generates a power supply control instruction of the city lighting lamp according to the environment sensing data, the switch unit is connected between the lighting unit and the power supply unit, the communication unit receives the power supply control instruction from the server, and the second control unit controls the switch unit to switch on power supply circuits of the lighting unit and the power supply unit according to the power supply control instruction, so that the power supply time of lighting facilities can be reasonably configured, and the problems that the lighting facilities are wasted in electric energy due to early starting and normal traffic due to late starting are solved while centralized power supply impact on a power grid is avoided.

Description

Power supply control system and method for smart city illumination

Technical Field

The invention relates to the technical field of public lighting control, in particular to a power supply control system and method for smart city lighting.

Background

Urban public lighting systems are important public infrastructures closely related to life of people, and with the acceleration of urban process, the demand and construction scale of the urban public lighting facilities are increasingly increased, and the traditional urban public lighting technology cannot meet the use demands of smart cities. On one hand, the traditional urban public lighting technology has larger energy requirement and consumption, and the use of a large number of public lighting facilities brings great burden to urban electricity consumption; on the other hand, the traditional urban public lighting system has a plurality of defects in management, so that the urban public lighting system has the problems of high equipment maintenance cost and serious lamp and cable theft. In order to solve the problems, the intelligent urban illumination technology is developed, and the comprehensive application of the intelligent perception technology, the Internet of things technology and the big data technology is combined on the basis of the illumination technology, so that the urban public illumination is greatly improved in energy consumption and management.

Because urban public lighting system mainly is used for night traffic lighting, consequently can tap into the mains supply in the evening and start illumination usually, though current LED street lamp starting current is little, the electric wire netting simultaneously usually can reserve certain surplus and bear this kind of extra electric load in order to avoid the overload problem of electric wire netting, and current wisdom urban lighting technology also generally can adopt decentralized control mode to the orderly street lamp of opening of timesharing subregion to avoid intensively opening the impact electric wire netting, lead to electric wire netting voltage fluctuation, influence electric wire netting power supply quality. However, the same city will not generally have too large a longitude span, which means that in different areas of the same city, even in the areas most eastern and most western, the night time of the areas most distant will not have a substantial difference, and a large number of public lighting facilities are started by dividing into areas, which will pull the starting time long, i.e. some areas need to start lighting at night, or some areas still wait for lighting to start after night, the former causes unnecessary electric energy waste, and the latter causes some areas not to be lighted in time, which affects normal traffic.

Disclosure of Invention

Based on the problems, the invention provides a power supply control system and a power supply control method for smart city lighting, which can reasonably configure the power supply time of lighting facilities, avoid centralized power supply from impacting a power grid, and solve the problems that the lighting facilities are started too early to waste electric energy and too late to influence normal traffic.

In view of this, a first aspect of the present invention proposes a power supply control system for smart city lighting, comprising a server for performing power supply control of city lighting and a city lighting fixture connected to the server, the server comprising a first control unit and a first communication unit, the city lighting fixture comprising a lighting unit, a sensing unit for acquiring environmental perception data of the city lighting fixture, a switching unit, a power supply unit, a second communication unit and a second control unit, the sensing unit comprising a visual sensing unit and a light intensity detection unit, the first control unit generating a power supply control instruction of the city lighting fixture from the environmental perception data, the switching unit being connected between the lighting unit and the power supply unit, the second communication unit establishing a communication connection with the first communication unit to receive the power supply control instruction from the first control unit, the second control unit controlling the switching unit to switch on a line of the lighting unit and the power supply unit in accordance with the power supply control instruction, the first control unit being configured to:

Determining a first lighting lamp of a busy road section and a first sub-period of a second sunset period corresponding to the first lighting lamp according to historical environment perception data, wherein the ending time of the first sub-period is the sunset time of the current city on the same day;

determining the first sunset time period based on a first subperiod of the second sunset time period, wherein the first sunset time period and the second sunset time period are continuous time periods connected end to end, and the sunset time of the current city on the day falls into the range of the second sunset time period;

acquiring real-time environment perception data of the urban lighting lamp in the first sunset period;

dividing urban lighting fixtures except the first lighting fixtures into second lighting fixtures of a non-busy road section occupied area and third lighting fixtures of a non-busy road section unoccupied area according to real-time environment perception data of the first sunset period;

the number of the second lighting fixtures and the number of the third lighting fixtures are respectively obtained;

determining a second sub-period and a third sub-period of the second sunset period according to the number of the second lighting fixtures and the third lighting fixtures, wherein the second sub-period corresponds to the second lighting fixtures, and the third sub-period corresponds to the third lighting fixtures;

And controlling the first lighting lamp, the second lighting lamp and the switching unit of the third lighting lamp to switch on power supply lines of the lighting unit and the power supply unit of the first lighting lamp, the second lighting lamp and the third lighting lamp respectively in the first subperiod, the second subperiod and the third subperiod.

A second aspect of the present invention proposes a power supply control method for smart city lighting, comprising:

determining a first lighting lamp of a busy road section and a first sub-period of a second sunset period corresponding to the first lighting lamp according to historical environment perception data, wherein the ending time of the first sub-period is the sunset time of the current city on the same day;

determining the first sunset time period based on a first subperiod of the second sunset time period, wherein the first sunset time period and the second sunset time period are continuous time periods connected end to end, and the sunset time of the current city on the day falls into the range of the second sunset time period;

acquiring real-time environment perception data of the urban lighting lamp in the first sunset period;

dividing urban lighting fixtures except the first lighting fixtures into second lighting fixtures of a non-busy road section occupied area and third lighting fixtures of a non-busy road section unoccupied area according to real-time environment perception data of the first sunset period;

The number of the second lighting fixtures and the number of the third lighting fixtures are respectively obtained;

determining a second sub-period and a third sub-period of the second sunset period according to the number of the second lighting fixtures and the third lighting fixtures, wherein the second sub-period corresponds to the second lighting fixtures, and the third sub-period corresponds to the third lighting fixtures;

and controlling the first lighting lamp, the second lighting lamp and the switching unit of the third lighting lamp to switch on power supply lines of the lighting unit and the power supply unit of the first lighting lamp, the second lighting lamp and the third lighting lamp respectively in the first subperiod, the second subperiod and the third subperiod.

Further, in the power supply control method for smart city lighting, the step of determining the first lighting fixture and the first sub-period of the second sunset period corresponding to the first lighting fixture according to the historical environment sensing data specifically includes:

acquiring historical environment perception data of each urban road section within a period of time, wherein the historical environment perception data comprises visual image data acquired by a perception unit of one or more urban lighting fixtures in each urban road section;

counting the people flow and/or the vehicle flow of each city road section according to the historical environment perception data;

When the human flow and/or the vehicle flow of any city road section is greater than a preset flow threshold value, determining the city road section as a busy road section;

and determining the urban lighting lamp arranged in the busy road section as a first lighting lamp.

Further, in the power supply control method for smart city lighting described above, after the step of determining the city lighting fixture set in the busy road section as the first lighting fixture, the method further includes:

counting the total number of the first lighting fixtures；

Obtaining preconfigured time-sharing power supply speedThe time-sharing power supply speed is the number of urban lighting fixtures for turning on a power supply switch in unit time;

calculating the power supply duration of the first lighting lamp:

；

determining the power supply reference time of the current city on the same day according to the real-time environment sensing dataThe power supply reference time ∈>Sunset time of the current city>And sunset period offset of the same day +.>Calculating to obtain;

according to the power supply time length of the first lighting lampDetermining a first target point in time:

；

setting the first target time pointIs +.>The period in between is determined as a first sub-period of the second sunset period.

Further, in the power supply control method for smart city lighting, the step of determining the second sub-period and the third sub-period of the second sunset period according to the number of the second lighting fixtures and the third lighting fixtures specifically includes:

Respectively counting the total number of the second lighting lampsAnd the total number of said third lighting fixtures +.>；

Obtaining preconfigured time-sharing power supply speedThe time-sharing power supply speed is the number of urban lighting fixtures for turning on a power supply switch in unit time;

respectively calculating the power supply duration of the second lighting lamp and the third lighting lamp:

；

determining the power supply reference time of the current city on the same day according to the real-time environment sensing dataThe power supply reference time ∈>Sunset time of the current city>And sunset period offset of the same day +.>Calculating to obtain;

according to the power supply time length of the second lighting lampAnd the power supply duration of the third lighting fixture +.>Determining a third target time point and a fourth target time point:

；

the sunset time is setAnd the third target time point +.>The period in between is determined as a second sub-period of the second sunset period;

setting the third target time pointAnd the fourth target time point +.>The period in between is determined as a third sub-period of the second sunset period.

Further, in the power supply control method for smart city lighting, the step of determining the first sunset period based on the first subinterval of the second sunset period specifically includes:

Acquiring a preconfigured first sunset period length；

According to the first sunset period lengthDetermining a second target point in time:

；

setting the second target time pointAnd the first target time point +.>The period in between is determined as the first sunset period.

Further, in the power supply control method for smart city lighting, the power supply reference time of the current city day is determined according to the real-time environment sensing dataThe method specifically comprises the following steps:

acquiring a second target time point of the dayIs set to be equal to or greater than the standard brightness of the sunset time period, which is preset>；

Based on the second target point in timeIs said second target point in time +.>City average luminance +.>；

Calculating the city average brightnessDifference between standard brightness and sunset period ∈>：

；

According to the difference valueCalculating the sunset period offset:

，

wherein the method comprises the steps ofIs a sunset period offset coefficient;

calculating the power supply reference time of the current city on the same day:

。

further, in the power supply control method for smart city lighting described above, the power supply control method is configured to control the power supply according to the difference valueBefore the step of calculating the sunset period offset, the method further comprises the following steps:

Obtaining a preconfigured brightness monitoring time lengthAnd luminance prediction duration +.>；

Acquiring brightness data of a brightness monitoring period from the real-time environment sensing data, wherein the starting time of the brightness monitoring period isThe end time of the brightness monitoring period is the second target time point +.>；

Predicting luminance data of a luminance prediction period based on the luminance data of the luminance monitoring period, the starting time of the luminance prediction period beingThe end time of the luminance prediction period is +.>；

Fitting a luminance variation curve function of the luminance prediction period using luminance data of the luminance prediction period;

calculating the end time of the brightness change curve function in the brightness prediction period asSlope at;

determining the slope as the sunset period offset coefficient。

Further, in the power supply control method for smart city lighting, the step of dividing the city lighting fixtures except the first lighting fixture into a second lighting fixture of a people area of a less busy road section and a third lighting fixture of an unmanned area of the less busy road section according to the real-time environment sensing data of the first sunset period specifically includes:

acquiring visual image data of the first sunset period from the real-time environment sensing data;

Determining whether a human body and/or a moving vehicle exists in an illumination range corresponding to each urban illumination lamp except the first illumination lamp according to the visual image data;

when a human body and/or a moving vehicle exists in the illumination range corresponding to any one of the urban illumination lamps except the first illumination lamp, determining the corresponding urban illumination lamp as a second illumination lamp;

otherwise, the corresponding urban lighting lamp is determined to be the third lighting lamp.

Further, in the power supply control method for smart city lighting, after determining whether a human body and/or a moving vehicle exists in a lighting range corresponding to each city lighting fixture except the first lighting fixture according to the visual image data, the method further includes:

when a moving human body or a moving vehicle is detected in an illumination range corresponding to any one of the urban illumination lamps, acquiring the moving direction and the moving speed of the human body or the vehicle;

determining the third target time point according to the moving direction and the moving speed of the human body or the vehicleUrban lighting fixtures that passed before;

Bringing the human body or the vehicle to the third target time pointThe previously passed urban lighting fixture is determined as the second lighting fixture.

The invention provides a power supply control system and a power supply control method for smart city lighting, wherein a lighting unit, a sensing unit, a switch unit, a power supply unit, a communication unit and a control unit are arranged in a city lighting lamp, the sensing unit comprises a visual sensing unit and a light intensity detection unit and is used for acquiring environment sensing data of the city lighting lamp, a server generates a power supply control instruction of the city lighting lamp according to the environment sensing data, the switch unit is connected between the lighting unit and the power supply unit, the communication unit receives the power supply control instruction from the server, and the second control unit controls the switch unit to switch on power supply circuits of the lighting unit and the power supply unit according to the power supply control instruction, so that the power supply time of lighting facilities can be reasonably configured, and the problems that the lighting facilities are wasted in electric energy due to early starting and normal traffic due to late starting are solved while centralized power supply impact on a power grid is avoided.

Drawings

FIG. 1A is a schematic diagram of a power control system for smart city lighting provided in accordance with one embodiment of the present invention;

FIG. 1B is a schematic view of an urban lighting fixture according to one embodiment of the present invention;

FIG. 2 is a flow chart of a power control method for smart city lighting provided in one embodiment of the present invention;

fig. 3 is a schematic diagram of a first sunset period and a second sunset period in a power supply control method for smart city lighting according to an embodiment of the present invention.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, the term "plurality" means two or more, unless explicitly defined otherwise, the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements 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. The terms "coupled," "mounted," "secured," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of this specification, the terms "one embodiment," "some implementations," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

A power supply control system and method for smart city lighting according to some embodiments of the present invention are described below with reference to the accompanying drawings.

As shown in fig. 1A and 1B, a first aspect of the present invention proposes a power supply control system for smart city lighting, including a server for performing power supply control of city lighting and a city lighting fixture connected to the server, the server including a first control unit and a first communication unit, the city lighting fixture including a lighting unit, a sensing unit, a switching unit, a power supply unit, a second communication unit, and a second control unit, the sensing unit being configured to acquire environmental sensing data of the city lighting fixture, the sensing unit including a visual sensing unit and a light intensity detection unit, the first control unit generating a power supply control instruction of the city lighting fixture according to the environmental sensing data, the switching unit being connected between the lighting unit and the power supply unit, the second communication unit establishing a communication connection with the first communication unit to receive the power supply control instruction from the first control unit, the second control unit controlling the switching unit to turn on a power supply line of the lighting unit and the power supply unit according to the power supply control instruction.

Specifically, the vision sensing unit is used for detecting human bodies and vehicles around the urban illumination lamp, and the light intensity detection unit is used for detecting the light intensity of the position of the urban illumination lamp. Preferably, the vision sensing unit is an infrared image sensor, and is used for acquiring infrared vision image data in the illumination range of the urban illumination lamp.

Fig. 1A is a schematic diagram of a power supply control system for smart city lighting according to some embodiments of the present invention, where connection lines in fig. 1A represent communication control connection relationships between units in the power supply control system.

Fig. 1A is a schematic diagram of an urban lighting fixture according to some embodiments of the present invention, and connection lines in fig. 1B represent a power supply connection relationship between a power supply unit in the urban lighting fixture and other units.

As shown in fig. 2, the first control unit is configured to:

determining a first lighting lamp of a busy road section and a first sub-period of a second sunset period corresponding to the first lighting lamp according to historical environment perception data, wherein the ending time of the first sub-period is the sunset time of the current city on the same day;

Determining the first sunset time period based on a first subperiod of the second sunset time period, wherein the first sunset time period and the second sunset time period are continuous time periods connected end to end, and the sunset time of the current city on the day falls into the range of the second sunset time period;

acquiring real-time environment perception data of the urban lighting lamp in the first sunset period;

dividing urban lighting fixtures except the first lighting fixtures into second lighting fixtures of a non-busy road section occupied area and third lighting fixtures of a non-busy road section unoccupied area according to real-time environment perception data of the first sunset period;

the number of the second lighting fixtures and the number of the third lighting fixtures are respectively obtained;

determining a second sub-period and a third sub-period of the second sunset period according to the number of the second lighting fixtures and the third lighting fixtures, wherein the second sub-period corresponds to the second lighting fixtures, and the third sub-period corresponds to the third lighting fixtures;

and controlling the first lighting lamp, the second lighting lamp and the switching unit of the third lighting lamp to switch on power supply lines of the lighting unit and the power supply unit of the first lighting lamp, the second lighting lamp and the third lighting lamp respectively in the first subperiod, the second subperiod and the third subperiod.

Specifically, the continuous time periods in which the first sunset time period and the second sunset time period are connected end to end means that the end time of the first sunset time period is the start time of the second sunset time period, the sunset time of the current city day falls within the range of the second sunset time period means that the sunset time of the current city day is later than the start time of the second sunset time period and earlier than the end time of the second sunset time period, see fig. 3, whereinCorresponding to said first sunset period, < > about->Corresponding to said second sunset period, < > in->、/>、/>The first sub-period, the second sub-period and the third sub-period respectively correspond to the second sunset period. The sunset time of the current city on the same day can be obtained by inquiring on a website of a weather bureau or an astronomical platform, and can also be obtained through an API (Application Programming Interface ) provided by a third party service website. The first sunset time period is a time period before sunset time of the current city, and the server acquires historical environment sensing data and environment sensing data of the first sunset time period to distinguish types of the city lighting lamps before approaching the sunset time, so that a corresponding power supply sequence of the city lighting lamps is determined.

The environment sensing data comprise visual image data and light intensity data of the periphery of the urban illumination lamp, which are detected by the urban illumination lamp through sensing units such as a visual sensing unit and a light intensity detection unit in the first sunset period and the second sunset period. The historical context awareness data is context awareness data stored by the server for a first sunset period and a second sunset period of each day over a period of time, such as a week or a month. The real-time environment sensing data refers to environment sensing data obtained by the server from a sensing unit of each urban lighting fixture in real time.

Further, in the power supply control system for smart city lighting described above, in the step of determining a first lighting fixture and a first sub-period of the second sunset period corresponding to the first lighting fixture according to the historical environment awareness data, the first control unit is configured to:

acquiring historical environment perception data of each urban road section within a period of time, wherein the historical environment perception data comprises visual image data acquired by a perception unit of one or more urban lighting fixtures in each urban road section;

Counting the people flow and/or the vehicle flow of each city road section according to the historical environment perception data;

when the human flow and/or the vehicle flow of any city road section is greater than a preset flow threshold value, determining the city road section as a busy road section;

and determining the urban lighting lamp arranged in the busy road section as a first lighting lamp.

Specifically, the time period refers to a preset statistical time length of the historical environmental awareness data, which is generally a time range covered by pushing forward for one week based on the current day, the statistical time length is too long, the data correlation is poor, and the statistical time period can cause the data accuracy to be inconsistent. The urban road section comprises a part of segmented or complete road section of a driving road and a pedestrian road, which are provided with urban illumination lamps, and it is known that for some urban roads with larger lengths and more entrances and exits, the difference of the flow of people and vehicles in different segments is larger, and the urban road section is divided according to the lengths and the number of entrances and exits.

Further, in the above power supply control system for smart city lighting, after the step of determining the city lighting fixtures set in the busy road section as the first lighting fixtures, the first control unit is configured to:

Counting the total number of the first lighting fixtures；

Obtaining preconfigured time-sharing power supply speedThe time-sharing power supply speed is the number of urban lighting fixtures for turning on a power supply switch in unit time；

Calculating the power supply duration of the first lighting lamp:

；

determining the power supply reference time of the current city on the same day according to the real-time environment sensing dataThe power supply reference time ∈>Sunset time of the current city>And sunset period offset of the same day +.>Calculating to obtain;

according to the power supply time length of the first lighting lampDetermining a first target point in time:

；

setting the first target time pointIs +.>The period in between is determined as a first sub-period of the second sunset period.

Specifically, the total number of the first lighting fixtures refers to the number of the first lighting fixtures determined as the first lighting fixtures in the current city. With continued reference to FIG. 3, the first target point in time is shown in FIG. 3Said sunset time->The sunset time +.>The sequence and the magnitude relation between the two. It should be noted that, in addition to the effect of sunset on the overall ambient brightness of the city, weather is also an important factor affecting the overall ambient brightness of the city, such as rainy days, foggy days, or cloudy days with heavy clouds, in which the intensity of the urban ambient light drops very rapidly before sunset, and it is necessary to adjust the time of the first sunset period and the second sunset period by a certain time offset, that is, the sunset period offset.

Further, in the above power supply control system for smart city lighting, in the step of determining the second and third sub-periods of the second sunset period according to the number of the second and third lighting fixtures, the first control unit is configured to:

respectively counting the total number of the second lighting lampsAnd the total number of said third lighting fixtures +.>；

Obtaining preconfigured time-sharing power supply speedThe time-sharing power supply speed is the number of urban lighting fixtures for turning on a power supply switch in unit time;

respectively calculating the power supply duration of the second lighting lamp and the third lighting lamp:

；

determining a current city from real-time context awareness dataReference time of power supply on the day of the cityThe power supply reference time ∈>Sunset time of the current city>And sunset period offset of the same day +.>Calculating to obtain;

according to the power supply time length of the second lighting lampAnd the power supply duration of the third lighting fixture +.>Determining a third target time point and a fourth target time point:

；

the sunset time is setAnd the third target time point +.>The period in between is determined as a second sub-period of the second sunset period;

Setting the third target time pointAnd the fourth target time point +.>The period in between is determined as a third sub-period of the second sunset period.

Further, in the above power supply control system for smart city lighting, in the step of determining the first sunset period based on the first subinterval of the second sunset period, the first control unit is configured to:

acquiring a preconfigured first sunset period length；

According to the first sunset period lengthDetermining a second target point in time:

；

setting the second target time pointAnd the first target time point +.>The period in between is determined as the first sunset period.

Likewise, the second target point in time is shown in FIG. 3The third target time point +.>The fourth target time point +.>Precedence and size relationships with other time points.

Further, in the power supply control system for smart city lighting, the power supply reference time of the current city day is determined according to the real-time environment sensing dataIn the step (a), the first control unit isIs configured to:

acquiring a second target time point of the dayIs set to be equal to or greater than the standard brightness of the sunset time period, which is preset >；

Based on the second target point in timeIs said second target point in time +.>City average luminance +.>；

Calculating the city average brightnessDifference between standard brightness and sunset period ∈>：

；

According to the difference valueCalculating the sunset period offset:

，

wherein the method comprises the steps ofIs a sunset period offset coefficient;

calculating the power supply reference time of the current city on the same day:

。

specifically, the real-time environmental awareness data of the second target time point includes the light intensity of the position of each urban lighting fixture obtained by the sensing unit of the urban lighting fixture, and it should be understood that, because the urban lighting fixtures are installed at relatively wide positions, such as roads, squares, parks, and the like, the brightness of the positions of the urban lighting fixtures at other positions is generally not too different except for the positions where the buildings and plants are relatively dense, so in the technical scheme of the invention, the obtaining of the real-time environmental awareness data of the second target time point on the same day can be the obtaining of the real-time environmental awareness data of part of the urban lighting fixtures, for example, selecting one urban lighting fixture from each region to obtain the environmental awareness data of the urban lighting fixtures, so as to reduce the data size and improve the processing efficiency.

Further, in the power supply control system for smart city lighting described above, the power supply control system is configured to control the power supply according to the difference valuePrior to the step of calculating the sunset period offset, the first control unit is configured to:

obtaining a preconfigured brightness monitoring durationAnd luminance prediction duration +.>；

Acquiring brightness data of a brightness monitoring period from the real-time environment sensing data, wherein the starting time of the brightness monitoring period isThe end time of the brightness monitoring period is the second target time point +.>；

Predicting luminance data of a luminance prediction period based on the luminance data of the luminance monitoring period, the starting time of the luminance prediction period beingThe end time of the luminance prediction period is +.>；/>

Fitting a luminance variation curve function of the luminance prediction period using luminance data of the luminance prediction period;

calculating the end time of the brightness change curve function in the brightness prediction period asSlope at;

determining the slope as the sunset period offset coefficient。

Specifically, the luminance prediction durationMay be +.A. for a period of time in the past, for example, for the past week or month>Average value of (2).

In some embodiments of the present invention, the step of predicting the luminance data of the luminance prediction period according to the luminance data of the luminance monitoring period may be fitting a luminance variation curve function corresponding to the luminance data of the luminance monitoring period, and calculating the luminance data of the luminance prediction period according to the luminance variation curve function. In some embodiments of the present invention, the step of predicting the luminance data of the luminance prediction period according to the luminance data of the luminance monitoring period may be training a luminance prediction model of the sunset period by using historical environment sensing data, and predicting the luminance data of the luminance prediction period based on the luminance prediction model.

Further, in the above power supply control system for smart city lighting, in the step of dividing the city lighting fixtures other than the first lighting fixtures into the second lighting fixtures of the non-busy road section occupied area and the third lighting fixtures of the non-busy road section occupied area according to the real-time environment awareness data of the first sunset period, the first control unit is configured to:

acquiring visual image data of the first sunset period from the real-time environment sensing data;

determining whether a human body and/or a moving vehicle exists in an illumination range corresponding to each urban illumination lamp except the first illumination lamp according to the visual image data;

when a human body and/or a moving vehicle exists in the illumination range corresponding to any one of the urban illumination lamps except the first illumination lamp, determining the corresponding urban illumination lamp as a second illumination lamp;

otherwise, the corresponding urban lighting lamp is determined to be the third lighting lamp.

Specifically, the visual image data includes infrared visual image data, and whether a human body exists in the illumination range of the urban illumination lamp can be recognized through the infrared visual image data. Because a large number of vehicles are often parked on each road side in a city for a long time, the vehicles are not started and no personnel are in the vehicle, and therefore, the stationary vehicle in the illumination range of the urban illumination lamp is not used as a condition for dividing the second illumination lamp and the third illumination lamp, but in some cases, for example, the vehicle is parked temporarily, a driver or a passenger is still on the vehicle or an engine of the vehicle is still in a starting state, and the vehicle is in a stationary state, but the unmanned vehicle parked on a roadside for a long time is different, and information such as the temperature of a human body or the engine on the vehicle can be obtained through the infrared visual image data, so that the information can be distinguished.

In some embodiments of the present invention, the server presets coordinate data of an illumination range corresponding to each urban illumination lamp, and determines whether the human body or the vehicle passes through the illumination range of a certain urban illumination lamp by matching the position of the human body or the vehicle with the coordinate data. In some embodiments of the present invention, whether the position of the human body or the vehicle is within the illumination range of a certain urban illumination lamp is determined by a specific rule, for example, coordinate data of an installation position of each urban illumination lamp is stored in a server, and a circular area with a preset distance as a radius centered on the installation position of each urban illumination lamp is determined as the illumination range of the urban illumination lamp.

Further, in the above power supply control system for smart city lighting, after the step of determining whether a human body and/or a moving vehicle is present in the illumination range corresponding to each of the city lighting fixtures other than the first lighting fixture by the visual image data, the first control unit is configured to:

when a moving human body or a moving vehicle is detected in an illumination range corresponding to any one of the urban illumination lamps, acquiring the moving direction and the moving speed of the human body or the vehicle;

Determining the third target time point according to the moving direction and the moving speed of the human body or the vehicleUrban lighting fixtures that passed before;

bringing the human body or the vehicle to the third target time pointThe previously passed urban lighting fixture is determined as the second lighting fixture.

In the foregoing embodiment, the third target point in time is determined based on the moving direction and the moving speed of the human body or the vehicleThe step of the previously passed urban lighting fixture specifically refers to the human body or the vehicle being +_ at the third target point in time>Past the lighting range of these urban lighting fixtures.

As shown in fig. 2, a second aspect of the present invention proposes a power supply control method for smart city lighting, comprising:

determining a first lighting lamp of a busy road section and a first sub-period of a second sunset period corresponding to the first lighting lamp according to historical environment perception data, wherein the ending time of the first sub-period is the sunset time of the current city on the same day;

determining the first sunset time period based on a first subperiod of the second sunset time period, wherein the first sunset time period and the second sunset time period are continuous time periods connected end to end, and the sunset time of the current city on the day falls into the range of the second sunset time period;

Acquiring real-time environment perception data of the urban lighting lamp in the first sunset period;

dividing urban lighting fixtures except the first lighting fixtures into second lighting fixtures of a non-busy road section occupied area and third lighting fixtures of a non-busy road section unoccupied area according to real-time environment perception data of the first sunset period;

the number of the second lighting fixtures and the number of the third lighting fixtures are respectively obtained;

determining a second sub-period and a third sub-period of the second sunset period according to the number of the second lighting fixtures and the third lighting fixtures, wherein the second sub-period corresponds to the second lighting fixtures, and the third sub-period corresponds to the third lighting fixtures;

and controlling the first lighting lamp, the second lighting lamp and the switching unit of the third lighting lamp to switch on power supply lines of the lighting unit and the power supply unit of the first lighting lamp, the second lighting lamp and the third lighting lamp respectively in the first subperiod, the second subperiod and the third subperiod.

Specifically, the continuous time periods in which the first sunset time period and the second sunset time period are connected end to end means that the end time of the first sunset time period is the start time of the second sunset time period, the sunset time of the current city day falls within the range of the second sunset time period means that the sunset time of the current city day is later than the start time of the second sunset time period and earlier than the end time of the second sunset time period, see fig. 3, wherein Corresponding to said first sunset period, < > about->Corresponding to said second sunset period, < > in->、/>、/>The first sub-period, the second sub-period and the third sub-period respectively correspond to the second sunset period. The sunset time of the current city on the same day can be obtained by inquiring on a website of a weather bureau or an astronomical platform, and can also be obtained through an API (Application Programming Interface ) provided by a third party service website. The first sunset time period is a time period before sunset time of the current city, and the server acquires historical environment sensing data and environment sensing data of the first sunset time period to distinguish types of the city lighting lamps before approaching the sunset time, so that a corresponding power supply sequence of the city lighting lamps is determined.

The environment sensing data comprise visual image data and light intensity data of the periphery of the urban illumination lamp, which are detected by the urban illumination lamp through sensing units such as a visual sensing unit and a light intensity detection unit in the first sunset period and the second sunset period. The historical context awareness data is context awareness data stored by the server for a first sunset period and a second sunset period of each day over a period of time, such as a week or a month. The real-time environment sensing data refers to environment sensing data obtained by the server from a sensing unit of each urban lighting fixture in real time.

Further, in the power supply control method for smart city lighting, the step of determining the first lighting fixture and the first sub-period of the second sunset period corresponding to the first lighting fixture according to the historical environment sensing data specifically includes:

acquiring historical environment perception data of each urban road section within a period of time, wherein the historical environment perception data comprises visual image data acquired by a perception unit of one or more urban lighting fixtures in each urban road section;

counting the people flow and/or the vehicle flow of each city road section according to the historical environment perception data;

when the human flow and/or the vehicle flow of any city road section is greater than a preset flow threshold value, determining the city road section as a busy road section;

and determining the urban lighting lamp arranged in the busy road section as a first lighting lamp.

Specifically, the time period refers to a preset statistical time length of the historical environmental awareness data, which is generally a time range covered by pushing forward for one week based on the current day, the statistical time length is too long, the data correlation is poor, and the statistical time period can cause the data accuracy to be inconsistent. The urban road section comprises a part of segmented or complete road section of a driving road and a pedestrian road, which are provided with urban illumination lamps, and it is known that for some urban roads with larger lengths and more entrances and exits, the difference of the flow of people and vehicles in different segments is larger, and the urban road section is divided according to the lengths and the number of entrances and exits.

Further, in the power supply control method for smart city lighting described above, after the step of determining the city lighting fixture set in the busy road section as the first lighting fixture, the method further includes:

counting the total number of the first lighting fixtures；

Obtaining preconfigured time-sharing power supply speedThe time-sharing power supply speed is the number of urban lighting fixtures for turning on a power supply switch in unit time;

calculating the power supply duration of the first lighting lamp:

；

determining the power supply reference time of the current city on the same day according to the real-time environment sensing dataThe power supply reference time ∈>Sunset time of the current city>And sunset period offset of the same day +.>Calculating to obtain;

according to the power supply time length of the first lighting lampDetermining a first target point in time:

；/>

setting the first target time pointIs +.>The period in between is determined as a first sub-period of the second sunset period.

Specifically, the total number of the first lighting fixtures refers to the number of the first lighting fixtures determined as the first lighting fixtures in the current city. With continued reference to FIG. 3, the first target point in time is shown in FIG. 3Said sunset time->The sunset time +. >The sequence and the magnitude relation between the two. It should be noted that, in addition to the effect of sunset on the overall ambient brightness of the city, weather is also an important factor affecting the overall ambient brightness of the city, such as rainy days, foggy days, or cloudy days with heavy clouds, in which the intensity of the urban ambient light drops very rapidly before sunset, and it is necessary to adjust the time of the first sunset period and the second sunset period by a certain time offset, that is, the sunset period offset.

Further, in the power supply control method for smart city lighting, the step of determining the second sub-period and the third sub-period of the second sunset period according to the number of the second lighting fixtures and the third lighting fixtures specifically includes:

respectively counting the total number of the second lighting lampsAnd the total number of said third lighting fixtures +.>；

Obtaining preconfigured time-sharing power supply speedThe time-sharing power supply speed is the number of urban lighting fixtures for turning on a power supply switch in unit time;

respectively calculating the power supply duration of the second lighting lamp and the third lighting lamp:

；

determining the power supply reference time of the current city on the same day according to the real-time environment sensing data The power supply reference time ∈>Sunset time of the current city>And sunset period offset of the same day +.>Calculating to obtain;

according to the power supply time length of the second lighting lampAnd the power supply duration of the third lighting fixture +.>Determining a third target time point and a fourth target time point:

；

the sunset time is setAnd the third target time point +.>The period therebetween is determined as a second sub of the second sunset periodA time period;

setting the third target time pointAnd the fourth target time point +.>The period in between is determined as a third sub-period of the second sunset period.

Further, in the power supply control method for smart city lighting, the step of determining the first sunset period based on the first subinterval of the second sunset period specifically includes:

acquiring a preconfigured first sunset period length；/>

According to the first sunset period lengthDetermining a second target point in time:

；

setting the second target time pointAnd the first target time point +.>The period in between is determined as the first sunset period.

Likewise, the second target point in time is shown in FIG. 3The third target time point +.>The fourth target time point +. >Precedence and size relationships with other time points.

Further, in the power supply control method for smart city lighting, the power supply reference time of the current city day is determined according to the real-time environment sensing dataThe method specifically comprises the following steps:

acquiring a second target time point of the dayIs set to be equal to or greater than the standard brightness of the sunset time period, which is preset>；

Based on the second target point in timeIs said second target point in time +.>City average luminance +.>；

Calculating the city average brightnessDifference between standard brightness and sunset period ∈>：

；

According to the difference valueCalculating the sunset period offsetThe amount is as follows:

，

wherein the method comprises the steps ofIs a sunset period offset coefficient;

calculating the power supply reference time of the current city on the same day:

。

specifically, the real-time environmental awareness data of the second target time point includes the light intensity of the position of each urban lighting fixture obtained by the sensing unit of the urban lighting fixture, and it should be understood that, because the urban lighting fixtures are installed at relatively wide positions, such as roads, squares, parks, and the like, the brightness of the positions of the urban lighting fixtures at other positions is generally not too different except for the positions where the buildings and plants are relatively dense, so in the technical scheme of the invention, the obtaining of the real-time environmental awareness data of the second target time point on the same day can be the obtaining of the real-time environmental awareness data of part of the urban lighting fixtures, for example, selecting one urban lighting fixture from each region to obtain the environmental awareness data of the urban lighting fixtures, so as to reduce the data size and improve the processing efficiency.

Further, in the power supply control method for smart city lighting described above, the power supply control method is configured to control the power supply according to the difference valuePrior to the step of calculating the sunset period offset, the first control unit is configured to:

obtaining a preconfigured brightness monitoring durationAnd luminance prediction duration +.>；

Acquiring brightness data of a brightness monitoring period from the real-time environment sensing data, wherein the starting time of the brightness monitoring period isThe end time of the brightness monitoring period is the second target time point +.>；

Predicting luminance data of a luminance prediction period based on the luminance data of the luminance monitoring period, the starting time of the luminance prediction period beingThe end time of the luminance prediction period is +.>；

Fitting a luminance variation curve function of the luminance prediction period using luminance data of the luminance prediction period;

calculating the end time of the brightness change curve function in the brightness prediction period asSlope at;

determining the slope as the sunset period offset coefficient。

Specifically, the luminance prediction period is longMay be +.A. for a period of time in the past, for example, for the past week or month>Average value of (2).

In some embodiments of the present invention, the step of predicting the luminance data of the luminance prediction period according to the luminance data of the luminance monitoring period may be fitting a luminance variation curve function corresponding to the luminance data of the luminance monitoring period, and calculating the luminance data of the luminance prediction period according to the luminance variation curve function. In some embodiments of the present invention, the step of predicting the luminance data of the luminance prediction period according to the luminance data of the luminance monitoring period may be training a luminance prediction model of the sunset period by using historical environment sensing data, and predicting the luminance data of the luminance prediction period based on the luminance prediction model.

Further, in the power supply control method for smart city lighting, the step of dividing the city lighting fixtures except the first lighting fixture into a second lighting fixture of a people area of a less busy road section and a third lighting fixture of an unmanned area of the less busy road section according to the real-time environment sensing data of the first sunset period specifically includes:

acquiring visual image data of the first sunset period from the real-time environment sensing data;

determining whether a human body and/or a moving vehicle exists in an illumination range corresponding to each urban illumination lamp except the first illumination lamp according to the visual image data;

when a human body and/or a moving vehicle exists in the illumination range corresponding to any one of the urban illumination lamps except the first illumination lamp, determining the corresponding urban illumination lamp as a second illumination lamp;

otherwise, the corresponding urban lighting lamp is determined to be the third lighting lamp.

Specifically, the visual image data includes infrared visual image data, and whether a human body exists in the illumination range of the urban illumination lamp can be recognized through the infrared visual image data. Because a large number of vehicles are often parked on each road side in a city for a long time, the vehicles are not started and no personnel are in the vehicle, and therefore, the stationary vehicle in the illumination range of the urban illumination lamp is not used as a condition for dividing the second illumination lamp and the third illumination lamp, but in some cases, for example, the vehicle is parked temporarily, a driver or a passenger is still on the vehicle or an engine of the vehicle is still in a starting state, and the vehicle is in a stationary state, but the unmanned vehicle parked on a roadside for a long time is different, and information such as the temperature of a human body or the engine on the vehicle can be obtained through the infrared visual image data, so that the information can be distinguished.

In some embodiments of the present invention, the server presets coordinate data of an illumination range corresponding to each urban illumination lamp, and determines whether the human body or the vehicle passes through the illumination range of a certain urban illumination lamp by matching the position of the human body or the vehicle with the coordinate data. In some embodiments of the present invention, whether the position of the human body or the vehicle is within the illumination range of a certain urban illumination lamp is determined by a specific rule, for example, coordinate data of an installation position of each urban illumination lamp is stored in a server, and a circular area with a preset distance as a radius centered on the installation position of each urban illumination lamp is determined as the illumination range of the urban illumination lamp.

Further, in the power supply control method for smart city lighting, after determining whether a human body and/or a moving vehicle exists in a lighting range corresponding to each city lighting fixture except the first lighting fixture according to the visual image data, the method further includes:

when a moving human body or a moving vehicle is detected in an illumination range corresponding to any one of the urban illumination lamps, acquiring the moving direction and the moving speed of the human body or the vehicle;

Determining the third target time point according to the moving direction and the moving speed of the human body or the vehicleUrban lighting fixtures that passed before;

bringing the human body or the vehicle to the third target time pointThe previously passed urban lighting fixture is determined as the second lighting fixture.

In the foregoing embodiment, the third target point in time is determined based on the moving direction and the moving speed of the human body or the vehicleThe step of the previously passed urban lighting fixture specifically refers to the human body or the vehicle being +_ at the third target point in time>Past the lighting range of these urban lighting fixtures.

It should be noted that in this document relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Embodiments in accordance with the present invention, as described above, are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (10)

1. A power supply control system for smart city lighting, comprising a server for performing city lighting power supply control and a city lighting fixture connected to the server, the server comprising a first control unit and a first communication unit, the city lighting fixture comprising a lighting unit, a sensing unit, a switching unit, a power supply unit, a second communication unit and a second control unit, the sensing unit being for obtaining environment sensing data of the city lighting fixture, the sensing unit comprising a visual sensing unit and a light intensity detection unit, the first control unit generating a power supply control instruction of the city lighting fixture from the environment sensing data, the switching unit being connected between the lighting unit and the power supply unit, the second communication unit establishing a communication connection with the first communication unit to receive the power supply control instruction from the first control unit, the second control unit controlling the switching unit to switch on a power supply line of the lighting unit and the power supply unit in accordance with the power supply control instruction, the first control unit being configured to:

Determining a first lighting lamp of a busy road section and a first sub-period of a second sunset period corresponding to the first lighting lamp according to historical environment perception data, wherein the ending time of the first sub-period is the sunset time of the current city on the same day;

determining a first sunset period based on a first subperiod of the second sunset period, wherein the first sunset period and the second sunset period are continuous periods connected end to end, and the sunset time of the current city on the day falls into the range of the second sunset period;

acquiring real-time environment perception data of the urban lighting lamp in the first sunset period;

dividing urban lighting fixtures except the first lighting fixtures into second lighting fixtures of a non-busy road section occupied area and third lighting fixtures of a non-busy road section unoccupied area according to real-time environment perception data of the first sunset period;

the number of the second lighting fixtures and the number of the third lighting fixtures are respectively obtained;

determining a second sub-period and a third sub-period of the second sunset period according to the number of the second lighting fixtures and the third lighting fixtures, wherein the second sub-period corresponds to the second lighting fixtures, and the third sub-period corresponds to the third lighting fixtures;

And controlling the first lighting lamp, the second lighting lamp and the switching unit of the third lighting lamp to switch on power supply lines of the lighting unit and the power supply unit of the first lighting lamp, the second lighting lamp and the third lighting lamp respectively in the first subperiod, the second subperiod and the third subperiod.

2. A power supply control method for smart city lighting, comprising:

determining a first lighting lamp of a busy road section and a first sub-period of a second sunset period corresponding to the first lighting lamp according to historical environment perception data, wherein the ending time of the first sub-period is the sunset time of the current city on the same day;

determining a first sunset period based on a first subperiod of the second sunset period, wherein the first sunset period and the second sunset period are continuous periods connected end to end, and the sunset time of the current city on the day falls into the range of the second sunset period;

acquiring real-time environment perception data of the urban lighting lamp in the first sunset period;

dividing urban lighting fixtures except the first lighting fixtures into second lighting fixtures of a non-busy road section occupied area and third lighting fixtures of a non-busy road section unoccupied area according to real-time environment perception data of the first sunset period;

The number of the second lighting fixtures and the number of the third lighting fixtures are respectively obtained;

determining a second sub-period and a third sub-period of the second sunset period according to the number of the second lighting fixtures and the third lighting fixtures, wherein the second sub-period corresponds to the second lighting fixtures, and the third sub-period corresponds to the third lighting fixtures;

and controlling the first lighting lamp, the second lighting lamp and the switching unit of the third lighting lamp to switch on power supply lines of the lighting unit and the power supply unit of the first lighting lamp, the second lighting lamp and the third lighting lamp respectively in the first subperiod, the second subperiod and the third subperiod.

3. The power supply control method for smart city lighting according to claim 2, wherein the step of determining a first lighting fixture and a first sub-period of the second sunset period corresponding to the first lighting fixture from historical environmental awareness data comprises:

acquiring historical environment perception data of each urban road section within a period of time, wherein the historical environment perception data comprises visual image data acquired by a perception unit of one or more urban lighting fixtures in each urban road section;

Counting the people flow and/or the vehicle flow of each city road section according to the historical environment perception data;

when the human flow and/or the vehicle flow of any city road section is greater than a preset flow threshold value, determining the city road section as a busy road section;

and determining the urban lighting lamp arranged in the busy road section as a first lighting lamp.

4. The power supply control method for smart city lighting according to claim 3, further comprising, after the step of determining the city lighting fixture set in the busy road section as the first lighting fixture:

counting the total number of the first lighting fixtures；

Obtaining preconfigured time-sharing power supply speedThe saidThe time-sharing power supply speed is the number of urban lighting lamps of which the power supply switch is turned on in unit time;

calculating the power supply duration of the first lighting lamp:

；

determining the power supply reference time of the current city on the same day according to the real-time environment sensing dataThe power supply reference time ∈>Sunset time of the current city>And sunset period offset of the same day +.>Calculating to obtain;

according to the power supply time length of the first lighting lampDetermining a first target point in time:

；

setting the first target time pointIs +. >The period in between is determined as a first sub-period of the second sunset period.

5. The power supply control method for smart city lighting according to claim 4, wherein the step of determining the second and third sub-periods of the second sunset period according to the number of the second and third lighting fixtures specifically comprises:

respectively counting the total number of the second lighting lampsAnd the total number of said third lighting fixtures +.>；

Obtaining preconfigured time-sharing power supply speedThe time-sharing power supply speed is the number of urban lighting fixtures for turning on a power supply switch in unit time;

respectively calculating the power supply duration of the second lighting lamp and the third lighting lamp:

；

determining the power supply reference time of the current city on the same day according to the real-time environment sensing dataThe power supply reference time ∈>Sunset time of the current city>And sunset period offset of the same day +.>Calculating to obtain;

according to the power supply time length of the second lighting lampAnd the power supply duration of the third lighting fixture +.>Determining a third target time point and a fourth target time point:

；

the sunset time is setAnd the third target time point +.>The period in between is determined as a second sub-period of the second sunset period;

Setting the third target time pointAnd the fourth target time point +.>The period in between is determined as a third sub-period of the second sunset period.

6. The power supply control method for smart city lighting according to claim 4 or 5, characterized in that the step of determining the first sunset period based on the first subinterval of the second sunset period comprises in particular:

acquiring a preconfigured first sunset period length；

According to the first sunset period lengthDetermining a second target point in time:

；

setting the second target time pointAnd the first target time point +.>The period in between is determined as the first sunset period.

7. The power supply control method for smart city lighting according to claim 6, wherein the power supply reference time of the current city day is determined based on real-time environment sensing dataThe method specifically comprises the following steps:

acquiring a second target time point of the dayIs provided with a pre-configured sunset time period standard luminance；

Based on the second target point in timeIs said second target point in time +.>City average luminance +.>；

Calculating the cityAverage brightnessDifference from the sunset period standard luminance:

；

According to the difference valueCalculating the sunset period offset:

；

wherein the method comprises the steps ofIs a sunset period offset coefficient;

calculating the power supply reference time of the current city on the same day:

。

8. the power supply control method for smart city lighting according to claim 7, wherein, in accordance with the difference valueBefore the step of calculating the sunset period offset, the method further comprises the following steps:

obtaining a preconfigured brightness monitoring time lengthAnd luminance prediction duration +.>；

Perception from the real-time environmentAcquiring brightness data of a brightness monitoring period from the data, wherein the starting time of the brightness monitoring period isThe end time of the brightness monitoring period is the second target time point +.>；

Predicting luminance data of a luminance prediction period from the luminance data of the luminance monitoring period at a second target point in timeFor the start time of the luminance prediction period, in +.>Predicting an end time of a period for the luminance;

fitting a luminance variation curve function of the luminance prediction period using luminance data of the luminance prediction period;

calculating the end time of the brightness change curve function in the brightness prediction period asSlope at;

determining the slope as the sunset period offset coefficient 。

9. The power supply control method for smart city lighting according to claim 5, wherein the step of dividing the city lighting fixtures other than the first lighting fixtures into a second lighting fixture of a non-busy road section occupied area and a third lighting fixture of a non-busy road section occupied area according to the real-time environment awareness data of the first sunset period specifically comprises:

acquiring visual image data of the first sunset period from the real-time environment sensing data;

determining whether a human body and/or a moving vehicle exists in an illumination range corresponding to each urban illumination lamp except the first illumination lamp according to the visual image data;

when a human body and/or a moving vehicle exists in the illumination range corresponding to any one of the urban illumination lamps except the first illumination lamp, determining the corresponding urban illumination lamp as a second illumination lamp;

otherwise, the corresponding urban lighting lamp is determined to be the third lighting lamp.

10. The power supply control method for smart city lighting according to claim 9, further comprising, after the step of determining from the visual image data whether a human body and/or a moving vehicle is present within a lighting range corresponding to each of the city lighting fixtures except the first lighting fixture:

When a moving human body or a moving vehicle is detected in an illumination range corresponding to any one of the urban illumination lamps, acquiring the moving direction and the moving speed of the human body or the vehicle;

determining the third target time point according to the moving direction and the moving speed of the human body or the vehicleUrban lighting fixtures that passed before;

bringing the human body or the vehicle to the third target time pointThe previously passed urban lighting fixture is determined as the second lighting fixture.