An event-based adaptive lighting energy saving control method and system

Abstract

The application discloses an event-based adaptive lighting energy-saving control method and system, and relates to the field of lighting energy saving.The method comprises the following steps: determining the opening time and the closing time of the lighting lamp according to the road surface brightness, the sunset time of the date and the sunrise time of the next day of the date; taking the opening time as the starting time and the closing time as the ending time; when the number of target objects at the current time is greater than a preset threshold, determining the opening number of the lighting lamp and the interval time of the opened lighting lamps, taking the maximum lighting brightness data of the lighting lamp as the brightness value, and calculating the voltage value of each opened lighting lamp; otherwise, when the current time is earlier than the preset closing time, calculating the voltage value of each opened lighting lamp according to a preset dimming brightness change function; when the current time is equal to the preset closing time, calculating the voltage value of each opened lighting lamp.The application can realize more efficient and energy-saving lighting.

Description

Technical Field

[0001] The present invention relates to the field of lighting energy saving, and in particular to an event-based adaptive lighting energy saving control method and system. Background Art

[0002] Global energy shortages and environmental pollution are becoming increasingly prominent amidst rapid economic growth. Lighting is a major source of energy consumption, and lighting redundancy has long been a critical issue that needs to be addressed. This redundancy primarily manifests in ineffective lighting occupying significant amounts of time. For example, streetlights on both sides of a road remain fully illuminated during periods of low traffic and pedestrian activity. This relatively low lighting utilization significantly wastes precious electricity resources. Therefore, research into more efficient and energy-saving lighting control solutions has long been a hot topic in this field.

[0003] To address this issue, existing technologies have focused on research into luminescent materials, power sources, energy storage, driver power supplies, and lighting control, and have achieved significant progress. Among traditional lighting materials, high- and low-pressure sodium lamps offer advantages over fluorescent and halogen lamps, such as higher luminous efficacy and a longer lifespan. They are widely used in highways, cities, and arterial roads. Urban streets and highways are primarily powered by these high- and low-pressure sodium lamps, providing significant convenience for daily life. Furthermore, it is worth noting that with the continuous advancement of semiconductor compounds, LED lighting has become the next generation of lighting that is most likely to replace traditional light sources worldwide. Compared to traditional lighting sources, it offers advantages such as high efficiency, low power consumption, energy conservation and environmental protection, low voltage drive, fast response, compact size, easy assembly and combination, DC drive, no flicker, and long service life. Demand for LED lighting is increasing in a wide range of applications, such as signal indication, display, and lighting. Currently, LED lighting boasts safety, environmental friendliness, and a long lifespan. In terms of electricity sources, thermal and hydropower generation have always been the primary sources. With technological advancements, emerging energy sources such as nuclear power, wind power, tidal power, biomass power, hydrogen power, and solar power have gradually replaced resource-intensive thermal power generation. These energy sources, such as nuclear power, wind power, tidal power, biomass power, hydrogen power, and solar power, are now integrated into the main grid and distributed to every household. Regarding energy storage, the development of battery technology has provided an effective solution for the problem of large-scale storage of electricity for immediate use. In the field of battery research and development, lead-acid batteries, based on chemical reactions, were the first to gain widespread attention. Due to their large inventory, safe and recyclable charge and discharge cycles, they are widely used in the power, automotive, and aerospace industries. Furthermore, lithium battery technology has advanced rapidly, and with its advantages of higher efficiency, larger capacity, higher recharge cycles, and smaller size, they are widely used in consumer electronics, electric vehicles, and satellites. The development of energy storage technology has greatly improved the utilization rate of electricity resources. In terms of driver power, the corresponding driver power supply varies significantly depending on the luminescent material and lighting principle. Different driver power supply methods also significantly affect luminous efficiency and service life. Therefore, designing an effective lighting driver power supply is also an effective means of implementing energy-saving lighting. For example, LED driver power supplies typically convert primary AC power into the required secondary DC power as input power, essentially converting the power supply to a specific voltage / current to drive the LED. The output power is generally a constant current whose voltage varies with the LED's forward voltage. Its core components include input filters, switch controllers, inductors, MOS switches, feedback resistors, and output filters. Lighting control has evolved through two stages: manual switching and automatic switching.The manual switch is arranged for a specific person to manually turn on or turn off the lighting power switch according to lighting needs, such as insufficient light in the evening, at night, in the morning, and in extremely low visibility caused by extreme weather and meteorological conditions. The automatic switch is realized by cooperating with a certain timer to realize the timing of turning on or off the lighting, or by using a certain controller and sensor detection technology to detect the light intensity to determine whether the lighting condition is met, and whether the pedestrian passes through or leaves the place to automatically realize the unattended function of the lighting lamp. Compared with the manual switch, the lighting utilization rate is greatly improved. The above-mentioned methods provide effective technical means for energy-saving lighting, and also make outstanding contributions to green environmental protection and efficient use of energy.

[0004] Although the above-mentioned schemes effectively solve the problem of energy-saving lighting, there are still some deficiencies, such as a long research and development period of the luminescent material, certain technical barriers, and a certain lag in the popularization and promotion of new materials. The existing power sources including new energy technologies have been in a slow development stage for a long time, and there has been no essential breakthrough in principle. Only some progress has been made in non-core aspects such as power generation efficiency, and the power generation capacity is not enough to completely replace the existing thermal power generation capacity. Therefore, in the short term, it is difficult to solve the problem of energy-saving lighting from the power generation end. Although the electricity storage technology has made great progress in recent years, it has high investment cost, short service life, limited charge and discharge times, high maintenance cost, high risk of fire, high maintenance and recovery cost, and other shortcomings, which greatly limit its use. Compared with these, the lighting control method seems to be a flexible and controllable energy-saving lighting method. However, the lighting switch control method based on infrared, grating and sound sensor detection technology still has some deficiencies. Usually, the lighting is triggered only when the pedestrian passes through the detection point, or almost all lighting switches are triggered due to unexpected noise, which inevitably leads to low effective lighting and poor energy-saving effect. SUMMARY

[0005] The purpose of the present application is to provide an event-based adaptive lighting energy-saving control method and system, which can effectively balance the relationship between lighting and energy saving, and realize more efficient and energy-saving lighting.

[0006] To achieve the above purpose, the present application provides the following solutions:

[0007] An event-based adaptive lighting energy-saving control method, the method comprising:

[0008] acquiring the distance between adjacent lighting lamps, the road brightness at the current time, the motion speed of the target object at the current time, the number of the target object at the current time, and the maximum number of the target object; the current time includes year, month, date and time;

[0009] Determining the on and off times of lighting fixture switches based on the road surface brightness, the sunset time of the date, and the sunrise time of the day after the date;

[0010] Taking the opening time as the starting time and the closing time as the ending time, determining whether the number of the target objects at the current time is greater than a preset threshold;

[0011] When the number of target objects at the current moment is greater than a preset threshold, the number of lighting fixtures to be turned on and the interval time for turning on the lighting fixtures are determined based on the movement speed of the target objects and the distance between them, and the voltage value of each of the turned-on lighting fixtures is calculated using the maximum lighting brightness data of the lighting fixtures as the brightness value; wherein, the lighting fixture corresponding to the target object at the current moment is the first lighting fixture to be turned on, and the lighting fixtures of the number to be turned on are turned on in sequence along the movement direction of the target object;

[0012] When the number of the target objects at the current moment is less than or equal to the preset threshold value, and the current moment is earlier than the preset timed off time, determining the first brightness value of the lighting fixtures turned on at the current moment according to a preset dimming brightness change function, and calculating the voltage value of each of the turned-on lighting fixtures;

[0013] When the number of target objects at the current moment is less than or equal to the preset threshold value, and the current moment is equal to the preset timed off time, the second brightness value of the lighting fixture turned on at the current moment is calculated based on the maximum and minimum values ​​of the average brightness of the road surface, the maximum number of the target objects, and the number of target objects at the current moment, and the voltage value of each of the turned-on lighting fixtures is calculated.

[0014] Optionally, determining the on and off times of the lighting fixture switches based on the road surface brightness, the sunset time of the date, and the sunrise time of the day after the date specifically includes:

[0015] Calculating the sunrise time and the sunset time according to the current time;

[0016] Determining whether the current time is later than or equal to the sunset time;

[0017] When the current time is later than or equal to the sunrise time, determining whether the road surface brightness is less than or equal to a preset brightness threshold;

[0018] When the road surface brightness is less than or equal to a preset brightness threshold, turning on each of the lighting fixtures to obtain the turning-on time;

[0019] Determine whether the current time is later than or equal to the sunrise time;

[0020] When the current time is later than or equal to the sunrise time, determining whether the road surface brightness is greater than or equal to the preset brightness threshold;

[0021] When the road surface brightness is greater than or equal to the preset brightness threshold, each of the lighting fixtures is turned off to obtain the turning-off time.

[0022] Optionally, the formula for determining the number of lighting fixtures to be turned on is:

[0023] ;

[0024] in, The number of lighting fixtures turned on; is the line of sight; The distance between adjacent lighting fixtures.

[0025] Optionally, the formula for determining the interval time for turning on the lighting fixture is:

[0026] ;

[0027] in, The interval time for turning on lighting fixtures; The distance between adjacent lighting fixtures; is the moving speed of the target object at the current moment.

[0028] Optionally, the preset dimming brightness change function is:

[0029] ;

[0030] in, is the brightness value of the turned-on lighting fixture; For the current moment; is the maximum average brightness of the road surface.

[0031] Optionally, the calculation formula for the second brightness value is:

[0032] ;

[0033] in, is the brightness value of the turned-on lighting fixture; is the maximum average brightness of the road surface; is the minimum average brightness of the road surface; is the number of target objects at the current moment; The maximum number of target objects.

[0034] An event-based adaptive lighting energy-saving control system, the system comprising a plurality of independent control devices; each of the control devices comprises:

[0035] An event detection module, configured to detect attributes of an event; the event being a moving object, person, and / or animal that can trigger the lighting fixture to turn on; the attributes including direction of movement, speed, and distance from the lighting fixture;

[0036] A sensor module for detecting time and road brightness;

[0037] a control module, connected to the event detection module and the sensor module, respectively, for applying an event-based adaptive lighting energy-saving control method to generate a driving signal and a control signal for the lighting fixtures based on the attributes and time of the event and the brightness of the road surface; the driving signal includes a voltage value of each of the turned-on lighting fixtures; and the control signal includes the number of turned-on lighting fixtures and the interval between turning on the lighting fixtures;

[0038] A driving module, connected to the control module, for turning on or off the lighting fixture according to the driving signal;

[0039] a communication module, connected to the control module and used for transmitting control signals;

[0040] The independent control devices are connected via a communication module.

[0041] Optionally, each of the independent control devices further includes a power processing module; the power processing module is used to supply power to the event detection module, the sensor module, the control module, the drive module and the communication module.

[0042] Optionally, the power processing module includes a transformer, a rectifier, a filter and a voltage conversion chip connected in sequence.

[0043] Optionally, each of the independent control devices further includes a positioning module; the positioning module is connected to the control module; the positioning module is used to locate the longitude coordinates of the location of the lighting fixture.

[0044] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0045] The present invention discloses an event-based adaptive lighting energy-saving control method and system, which determines the on and off times of lighting fixtures according to the road brightness, the sunset time of a date, and the sunrise time of the day after the date; takes the on time as the starting time and the off time as the ending time, and judges whether the number of target objects at the current time is greater than a preset threshold; when the number of target objects at the current time is greater than the preset threshold, determines the number of lighting fixtures to be turned on and the interval time of turning on the lighting fixtures according to the movement speed and spacing of the target objects, and calculates the voltage value of each lighting fixture to be turned on with the maximum lighting brightness data of the lighting fixture as the brightness value; when the number of target objects at the current time is less than or equal to the preset threshold, and the current time is earlier than the preset timed off time When the number of target objects at the current moment is less than or equal to the preset threshold value, and the current moment is equal to the preset timed off time, the second brightness value of the lighting fixture turned on at the current moment is calculated according to the maximum and minimum values ​​of the average brightness of the road surface, the maximum number of target objects and the number of target objects at the current moment, and the voltage value of each lighting fixture turned on is calculated. The present invention adjusts the brightness of the lighting fixture by triggering an event. When an event is triggered, the brightness of the lighting fixture is increased. When there is no event, the lighting fixture is in a low-power working state, effectively balancing the relationship between lighting and energy saving, and achieving more efficient and energy-saving lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 This is a schematic diagram of the effect of event-based adaptive lighting energy-saving control;

[0048] Figure 2 This is a schematic diagram of the hardware connection structure of the street light control node;

[0049] Figure 3 This is the hardware circuit schematic diagram of the minimum controller system;

[0050] Figure 4 This is the hardware circuit schematic diagram of the time module;

[0051] Figure 5 This is the hardware circuit schematic diagram of the communication module;

[0052] Figure 6 This is the circuit schematic diagram of the power processing module;

[0053] Figure 7 This is the hardware circuit schematic diagram of the brightness detection module;

[0054] Figure 8 This is the hardware circuit schematic diagram of the radar event detection module;

[0055] Figure 9 This is the hardware circuit schematic diagram of the Beidou positioning module;

[0056] Figure 10 This is the schematic diagram of the control circuit based on relay and PWM pulse width modulation;

[0057] Figure 11 This is a flow chart of the event-based adaptive lighting energy-saving control method provided by the present invention. DETAILED DESCRIPTION

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0059] The purpose of the present invention is to provide an event-based adaptive lighting energy-saving control method and system, aiming to effectively balance the relationship between lighting and energy saving and achieve more efficient and energy-saving lighting.

[0060] Building on existing technologies, this paper designs an event-based adaptive lighting energy-saving control method and system that effectively balances lighting and energy conservation. It also provides specific system design solutions for lighting energy-saving control in several specific scenarios. This invention integrates electronic circuit technology, detection technology, positioning technology, and communication technology to address energy-saving issues in civilian lighting. It can be widely applied to indoor hall lighting in large buildings, urban street lighting, and path lighting along campuses and parks.

[0061] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0062] Example 1

[0063] like Figure 1 As shown, the event-based adaptive lighting energy-saving control method in this embodiment includes:

[0064] Step S1: Obtain the distance between adjacent lighting fixtures, the road surface brightness at the current moment, the movement speed of the target object at the current moment, the number of the target objects at the current moment, and the maximum number of the target objects; the current moment includes year, month, date and time.

[0065] Step S2: determining the on-time and off-time of the lighting fixture switch according to the road surface brightness, the sunset time of the date, and the sunrise time of the day after the date.

[0066] S2 specifically includes:

[0067] Step S21: Calculate the sunrise time and the sunset time according to the current time.

[0068] Step S22: Determine whether the current time is later than or equal to the sunset time.

[0069] Step S23: When the current time is later than or equal to the sunrise time, determine whether the road surface brightness is less than or equal to a preset brightness threshold.

[0070] Step S24: When the road surface brightness is less than or equal to a preset brightness threshold, each of the lighting fixtures is turned on to obtain the turn-on time.

[0071] Step S25: Determine whether the current time is later than or equal to the sunrise time.

[0072] Step S26: When the current time is later than or equal to the sunrise time, determine whether the road surface brightness is greater than or equal to the preset brightness threshold.

[0073] Step S27: When the road surface brightness is greater than or equal to the preset brightness threshold, each of the lighting fixtures is turned off to obtain the turning-off time.

[0074] Step S3: Taking the opening time as the starting time and the closing time as the ending time, it is determined whether the number of the target objects at the current time is greater than a preset threshold.

[0075] Step S4: When the number of the target objects at the current moment is greater than a preset threshold, the number of lighting fixtures to be turned on and the interval time for turning on the lighting fixtures are determined according to the movement speed of the target objects and the distance between them, and the voltage value of each of the turned-on lighting fixtures is calculated using the maximum lighting brightness data of the lighting fixtures as the brightness value; wherein, the lighting fixture corresponding to the target object at the current moment is taken as the first lighting fixture to be turned on, and the number of lighting fixtures to be turned on are turned on in sequence along the movement direction of the target object.

[0076] Step S5: when the number of the target objects at the current time is less than or equal to the preset threshold, and the current time is earlier than the preset time-off time, determining a first brightness value of the lighting lamps turned on at the current time according to a preset gradual dimming brightness change function, and calculating a voltage value of each of the lighting lamps turned on.

[0077] Step S6: when the number of the target objects at the current time is less than or equal to the preset threshold, and the current time is equal to the preset time-off time, calculating a second brightness value of the lighting lamps turned on at the current time according to the maximum value and the minimum value of the average brightness of the road surface, and the maximum number of the target objects and the number of the target objects at the current time, and calculating a voltage value of each of the lighting lamps turned on.

[0078] In actual application, the present application comprises three parts of adaptive control of lighting switch, adaptive control of lighting brightness, and advanced opening-lagged closing and adaptive control of brightness.

[0079] The first part is adaptive control of lighting switch.

[0080] The sunrise and sunset of a day can be obtained according to the day length divided by the time of noon, the time of noon can be obtained according to the time zone and the longitude, and the time zone can be obtained according to the longitude; the day length can be calculated according to the solar declination and the latitude, and the calculated day length is taken as the reference time for turning off and turning on the street lamps, and the calculation process is as follows:

[0081] Firstly, the current year, month and day time is obtained, and the number of days from January 1 of the current year to the current date is calculated num The current solar declination is calculated according to the following equation

[0082] (1);

[0083] Let The polar day and the polar night are determined according to the following logic:

[0084] , (2);

[0085] The Beidou data is read to obtain the longitude position data of the current street lamp, and the time zone of the current street lamp is calculated according to the longitude position data:

[0086] (3);

[0087] If and , the day length of the current street lamp is calculated according to the following equation:

[0088] ​(4);

[0089] From this, the solar noon time can be calculated according to the following equation:

[0090] (5);

[0091] Then calculate the sunrise time according to the following equation and sunset time for:

[0092] (6);

[0093] (7);

[0094] Although lighting can be adaptively controlled according to the sunrise and sunset times, there is a certain difference between the road surface brightness that people feel at sunrise and sunset in real life and the road surface brightness at sunset and sunrise times calculated theoretically. For example, at the theoretically calculated sunset time, the actual road surface brightness can fully meet the traffic safety needs, and it may only really affect the vision of traffic participants after a period of time; on the contrary, before the theoretically calculated sunrise time, the actual road surface brightness can also fully meet the vision needs of traffic participants. It can be seen from this that the actual lighting on and off time should be appropriately adjusted based on the theoretically calculated time to achieve the goal of effectively saving electric energy resources within a reasonable road surface brightness range. On the other hand, meteorological conditions are also an important factor in determining lighting. For example, rain, snow, heavy fog and cloudy days caused by strong convection may cause the road surface brightness to drop sharply, thereby affecting the safety of traffic participants. According to the "Urban Road Lighting Design Standard" (CJJ45-2015), at sunset, the road surface brightness should be adjusted according to the theoretical calculation time. and sunrise time , the average brightness of the road surface should meet the maximum average brightness and minimum average brightness To solve this problem, the present invention uses a brightness sensor to detect the road brightness condition, and sets a time threshold based on experience. , the lighting switch adaptive control algorithm is designed as follows:

[0095] ;

[0096] ;

[0097] The second part is adaptive control of lighting brightness.

[0098] The adaptive control algorithm for lighting switches in the first part can adaptively adjust the lighting switch time according to the actual average brightness of the road surface, which can not only ensure driving safety but also achieve the goal of energy saving. After the lighting is turned on, there is still room for energy saving. For example, during the time period when there are no pedestrians and vehicles, the lighting can be turned off or the lighting brightness can be lowered to further save electricity, while during the time period when there are pedestrians and vehicles, the maximum lighting brightness can be turned on. In order to balance the needs of lighting and saving electricity, the present invention uses road brightness, traffic flow and parking sight distance as the main parameters for designing the adaptive adjustment algorithm for lighting brightness. The maximum traffic capacity allowed for the road is determined based on the road type and the "Urban Road Engineering Design Code" (CJJ37-2012). and minimum traffic flow , and the corresponding maximum average road brightness and minimum value , and calculate the actual lighting brightness and traffic flow The functional relationship between them is:

[0099] (8);

[0100] Considering that at night or when there are no vehicles or pedestrians on the road for a long time, if the maximum lighting brightness is maintained continuously, it will cause a huge waste of electricity. Or according to equation (8), maintaining the minimum lighting brightness with the minimum traffic flow will inevitably cause a great impact on traffic participants. To this end, this design proposes an event-based lighting brightness adaptive adjustment algorithm, which uses the method of turning on the maximum lighting and dimming the rear brightness by forward speed tracking, in order to achieve the purpose of further balancing lighting and energy saving. The main idea of ​​the algorithm is: during sunset, according to the expected lighting brightness Calculate the required lighting intensity:

[0101] (9);

[0102] After the lighting is turned on, the road traffic volume is detected. If the traffic volume is large, the required lighting brightness is calculated according to equation (8); otherwise, the lighting should be turned off or turned on based on the minimum traffic volume. However, when pedestrians or vehicles appear by chance, the maximum lighting brightness is turned on ahead of them in the direction of their advance. , the number of lights turned on Consider the driver's stopping sight distance The stopping sight distance refers to the shortest driving distance required for the driver to stop safely in front of the obstacle from the moment he sees it. , braking distance from the start of braking to a complete stop and safe distance The stopping sight distance is:

[0103] (10);

[0104] To keep the front of the vehicle always open lighting, designed at a certain time interval Turn on the lighting fixtures forward; when the vehicle passes the streetlights, the streetlights are turned off at a certain time interval or adjusted to the lighting brightness when the vehicle has the least traffic flow according to equation (8). In equation (10), is the driver's reaction time, generally 2.5s; is the braking coefficient, generally between 1.2 and 1.4; The longitudinal slope coefficient of the road is +2 when going uphill and -2 when going downhill; The longitudinal friction coefficient between the road surface and the tire varies with different tire, road surface, braking and other conditions. The calculation of the stopping sight distance is generally based on the wet state of the road surface; the safety distance Generally, it is taken as (5-10m); The driving speed is 85% of the maximum speed when the road design speed is 120-80km / h; 90% of the maximum speed when the road design speed is 60-40km / h; and 100% of the maximum speed when the road design speed is 30-20km / h.

[0105] In order to maximize the balance between lighting brightness and energy saving after the street lights are turned on, the present invention designs an event-based adaptive lighting brightness adjustment algorithm. The algorithm reads the current time through the Beidou positioning chip and detects the current road traffic volume through radar. From sunset to sunrise, if the system time is within the street light on time period, the lighting brightness is calculated according to equation (9); when the street lights are turned on, the lighting brightness is calculated according to equation (8). If the radar detects an event during this period, the movement speed of the event is read and the parking sight distance is calculated according to equation (10). Then, based on the event movement speed and the parking sight distance, the number of lights that need to be turned on in front of the event, as well as the order and interval between the lights, are calculated. In order to ensure the short-term brightness requirements, these street lights will be turned on to the maximum brightness. The specific content of the event-based adaptive lighting brightness adjustment algorithm is as follows:

[0106] ;

[0107] ;

[0108] Algorithms 1 and 2 determine the time when the lighting is turned on and off and the basic method for adaptively adjusting the lighting brightness after it is turned on. According to the lighting brightness requirements under different conditions, it needs to be converted into a control loop PWM pulse width cycle. The present invention adjusts the lighting brightness Normalization process to get PWM pulse width percentage:

[0109] (11);

[0110] The third part is the advanced opening, delayed closing and brightness adaptive control.

[0111] After the streetlight is turned on, there is a considerable amount of ineffective lighting for a considerable period of time. In order to improve energy saving and lighting effects, this design proposes a streetlight advance start-up and delayed tracking dimming algorithm based on the aforementioned algorithm. The main idea of ​​the algorithm is: after the light is turned on, if the radar detects an event, it reads the event's movement speed and calculates the stopping sight distance according to equation (10). Then, based on the event's movement speed and stopping sight distance, it calculates the number of lights that need to be turned on in front of the event, as well as the order and interval between these lights. The first streetlight controller that detects the event sends the streetlight ID number that needs to be turned on in the direction of movement through the wireless communication module. These streetlight IDs that receive the turn-on command turn on the streetlight without delay and turn the brightness to the maximum, with the PWM duty cycle adjusted to a maximum of 1. When the event leaves the lighting range of the current ID streetlight, it means that the radar of the streetlight ID cannot detect the event. At this time, the streetlight controller starts the timer and reduces the lighting brightness according to the exponential relationship according to the timer count until the timer ends, and calculates the lighting brightness according to equation (8). This allows us to achieve the goal of turning on streetlights in advance to improve illumination when incidents occur, and to reduce the lighting brightness through delayed tracking to achieve energy saving. The specific process is shown in Algorithm 3.

[0112] ;

[0113] The specific working process of the present invention is as follows:

[0114] Step 1: Initialize the hardware circuit and software program parameters, configure the street light ID, radar module, brightness detection module and PWM cycle parameters, etc.; set the street light distance, maximum speed limit, expected brightness, maximum flow rate, and driver reaction time. and the maximum brightness value.

[0115] Step 2: Call Algorithm 1 to perform adaptive control on the street light switch;

[0116] Step 3: After the streetlight is turned on, if the lighting brightness needs to be adjusted, call Algorithm 2 to adaptively adjust the lighting brightness based on the event;

[0117] Step 4: After the streetlights are turned on, if the road is in a period of low traffic with no pedestrians or vehicles for a long time, in case of an accidental event, Algorithm 3 is called to turn on the streetlights at the highest brightness in advance. If the streetlight radar cannot detect the event, delayed tracking is initiated to reduce the lighting brightness.

[0118] Step 5: When the system detects that the current time is close to sunrise, it calls Algorithm 1 to perform adaptive shutdown control on the street lighting.

[0119] The present invention can save a lot of electricity expenses in lighting occasions, and at the same time increase the viewing experience in some roads, parks, campuses, riverside / coastal places, etc. In addition, it is easy to use, cost-effective, and easier to realize expansion functions.

[0120] Example 2

[0121] The present invention provides an event-based adaptive lighting energy-saving control system, the system comprising a plurality of independent control devices; each of the control devices comprises:

[0122] The event detection module is used to detect the attributes of an event; the event is a moving object, person and / or animal that can trigger the lighting fixture to turn on; the attributes include movement direction, travel speed and distance from the lighting fixture.

[0123] The sensor module is used to detect the time and the brightness of the road surface.

[0124] A control module is connected to the event detection module and the sensor module respectively, and is used to apply an event-based adaptive lighting energy-saving control method according to the attributes and time of the event and the brightness of the road surface to generate drive signals and control signals for the lighting fixtures; the drive signal includes the voltage value of each of the turned-on lighting fixtures; and the control signal includes the number of turned-on lighting fixtures and the interval time for turning on the lighting fixtures.

[0125] The driving module is connected to the control module and is used to turn on or off the lighting fixture according to the driving signal.

[0126] The communication module is connected to the control module and is used to transmit control signals.

[0127] The independent control devices are connected via a communication module.

[0128] As a specific embodiment, each independent control device further includes a power processing module; the power processing module is used to power the event detection module, the sensor module, the control module, the drive module, and the communication module. Each independent control device further includes a positioning module; the positioning module is connected to the control module and is used to locate the longitude coordinates of the lighting fixture.

[0129] The power processing module includes a transformer, a rectifier, a filter and a voltage conversion chip connected in sequence.

[0130] In this invention, external moving objects that can trigger the lighting fixtures to turn on, such as pedestrians and vehicles, are defined as events. The lighting fixture control logic is triggered according to the change in the motion state of the event to maximize the lighting efficiency. In this invention, a separate control module is configured for each independent controlled object in the lighting scene, namely the lighting fixture, and a wireless communication module is used to realize data transmission between them. The design uses an event detection module to effectively detect the movement direction, speed and distance of the event from the current lighting fixture. Specifically, a radar event detection module is used, that is, Figure 8 The LD303-24G radar module in the system works according to radar detection principles. It scans the relative distance of vehicles or pedestrians from the radar installation point (streetlight), then divides the distance by the time difference to obtain the real-time distance and location. The brightness module detects road brightness and determines the current light level, which serves as a factor in controlling the on / off switching of lighting fixtures. The time module determines the current time, which serves as an important factor in controlling the on / off switching of lighting fixtures. The power module provides power to the lighting fixtures and control module, providing 220V AC power to high-power lighting fixtures and converting it into power for the control module. The lighting driver module controls the on / off switching of lighting fixtures by receiving signals from the controller, and also has a dimming function. The hardware of the control system mainly includes the lower-power STC15W201S series microcontroller as the core component of the control module; the power module, the lighting driver circuit, the RS232 serial bus communication module, which includes a wireless communication module based on PTR2000 and an LD303-24G radar module for event detection, the Beidou positioning module UM220-IV, and the IIC serial bus detection module, which includes a road brightness detection module based on GY30 and a time module based on DS1302. Each unit module works in coordination to complete analysis, decision-making, and execution. The overall working principle of the hardware circuit is as follows: Figure 2 shown.

[0131] The power processing module consists of a transformer, a rectifier bridge, a filter, and a voltage conversion chip. The transformer input is 220V AC, which is converted to 5V. The 5V then needs to be rectified to a 5V DC signal by a silicon stack (rectifier bridge). However, since the DC signal still pulsates, it is not suitable for powering the chip. Therefore, it passes through a capacitor in the filter circuit to rectify and remove burrs and other noise. Only then can the processed signal be supplied to other electrical components and chips. To enable communication between the various streetlight nodes, this design uses a PTR2000 wireless communication module based on a serial protocol. To detect events and their speed, this design uses an LD303-24G LiDAR module. The controller receives detected event status as an interrupt using a serial protocol. Furthermore, to detect road brightness, a GY30 photosensor is integrated into the sensor. The detected light intensity is used as one of the criteria for determining whether to turn on the lamp or the intensity of the light. A DS1302-based clock module is integrated into the design to determine the real-time status of the event. The sunrise and sunset times of each day are used as one of the important bases for determining whether to turn on the lighting or the lighting intensity of the lamps. The Beidou positioning module UM220-IV is used to locate the longitude and latitude coordinates of the street lamps and determine the theoretical times of sunrise and sunset. As the only controlled object of this design is the lighting fixture, a control circuit based on relays and PWM pulse width modulation is designed. This circuit can provide the corresponding power supply voltage according to the driving power required by the lighting fixture. The controller used in the design is STC15W201S-SOP16, which has an integrated crystal oscillator circuit and can be set between 5MHz and 35MHz through programming (#define MAIN_Fosc 12000000L). Figures 3 to 10 The component parameters are shown in Table 1.

[0132] ;

[0133] Based on the streetlight control module, a communication module between lighting nodes is used to achieve data transmission between each other, thereby achieving the goal of energy-saving lighting. The core concept of the lighting energy-saving control method is that when the event detection module is triggered by a motion event, the control module determines whether the distance between the event and the lighting fixture is within the lighting range based on the data provided by the detection module. Specifically, the control module determines the relative distance between the event and the lighting fixture detected by the laser radar installed on the lighting fixture control module. If the event is within the lighting range, the lighting driver module is controlled to turn on the lighting fixture. In addition, the main difference between the present invention and existing energy-saving lighting methods is that the event status data provided by the detection module is used to determine the direction of the event's movement. A number of streetlights in that direction are pre-activated based on the event's movement speed. The number of streetlights activated is directly related to the event's movement speed. The faster the speed, the more streetlights in the direction of the event are activated, and the faster the activation speed. When the event passes through the lighting node, the streetlights are controlled to turn off and / or reduce their brightness at a certain speed from the farthest to the nearest direction based on its movement direction. During this process, the illumination can be gradually reduced according to the characteristics of the lamps until they are completely shut down. In addition, for some events such as pedestrians, they may stay briefly or remain stationary within the lighting range. The detection module can determine whether there is an event within the current lighting range of the lamp based on the micro-movement of the event, and then determine whether the lighting is turned on.

[0134] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0135] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An event-based adaptive lighting energy-saving control method, characterized in that: The method comprises: Obtaining the distance between adjacent lighting fixtures, the road surface brightness at the current moment, the movement speed of the target object at the current moment, the number of the target objects at the current moment, and the maximum number of the target objects; the current moment includes year, month, date, and time; Determining the on and off times of lighting fixture switches based on the road surface brightness, the sunset time of the date, and the sunrise time of the day after the date; Taking the opening time as the starting time and the closing time as the ending time, determining whether the number of the target objects at the current time is greater than a preset threshold; When the number of target objects at the current moment is greater than a preset threshold, the number of lighting fixtures to be turned on and the interval time for turning on the lighting fixtures are determined based on the movement speed of the target objects and the distance between them, and the voltage value of each of the turned-on lighting fixtures is calculated using the maximum lighting brightness data of the lighting fixtures as the brightness value; wherein, the lighting fixture corresponding to the target object at the current moment is the first lighting fixture to be turned on, and the lighting fixtures of the number to be turned on are turned on in sequence along the movement direction of the target object; When the number of target objects at the current moment is less than or equal to the preset threshold value, and the current moment is earlier than the preset timed off time, determining the first brightness value of the lighting fixtures turned on at the current moment according to a preset dimming brightness change function, and calculating the voltage value of each of the turned-on lighting fixtures; When the number of target objects at the current moment is less than or equal to the preset threshold value, and the current moment is equal to the preset timed off time, the second brightness value of the lighting fixture turned on at the current moment is calculated based on the maximum and minimum values ​​of the average brightness of the road surface, the maximum number of the target objects, and the number of target objects at the current moment, and the voltage value of each of the turned-on lighting fixtures is calculated.

2. The event-based adaptive lighting energy-saving control method according to claim 1, characterized in that: Determining the on and off times of lighting fixture switches based on the road surface brightness, the sunset time of the date, and the sunrise time of the day after the date, specifically including: Calculating the sunrise time and the sunset time according to the current time; Determining whether the current time is later than or equal to the sunset time; When the current time is later than or equal to the sunrise time, determining whether the road surface brightness is less than or equal to a preset brightness threshold; When the road surface brightness is less than or equal to a preset brightness threshold, turning on each of the lighting fixtures to obtain the turning-on time; Determine whether the current time is later than or equal to the sunrise time; When the current time is later than or equal to the sunrise time, determining whether the road surface brightness is greater than or equal to the preset brightness threshold; When the road surface brightness is greater than or equal to the preset brightness threshold, each of the lighting fixtures is turned off to obtain the turning-off time.

3. The event-based adaptive lighting energy-saving control method according to claim 1, characterized in that: The formula for determining the number of lighting fixtures to be turned on is: Among them, Num on is the number of lighting fixtures turned on; S is the viewing distance; L dis The distance between adjacent lighting fixtures.

4. The event-based adaptive lighting energy-saving control method according to claim 1, characterized in that: The formula for determining the interval time for turning on lighting fixtures is: Among them, Int on L is the interval time for turning on lighting fixtures; dis is the distance between adjacent lighting fixtures; v is the moving speed of the target object at the current moment.

5. The event-based adaptive lighting energy-saving control method according to claim 1, characterized in that: The preset dimming brightness change function is: f(n)=L ave.max e 1-κ ; Where f(n) is the brightness value of the turned-on lighting fixture; κ is the current moment; L ave.max is the maximum average brightness of the road surface.

6. The event-based adaptive lighting energy-saving control method according to claim 1, characterized in that: The calculation formula of the second brightness value is: Where, f(n) is the brightness value of the turned-on lighting fixture; L ave.max is the maximum average brightness of the road surface; L ave.min is the minimum average brightness of the road surface; n is the number of target objects at the current moment; N max The maximum number of target objects.

7. An event-based adaptive lighting energy-saving control system, characterized in that: The system includes a plurality of independent control devices; Each of the control devices comprises: An event detection module, configured to detect attributes of an event; the event being a moving object, person, and / or animal that can trigger the lighting fixture to turn on; the attributes including direction of movement, speed, and distance from the lighting fixture; A sensor module for detecting time and road brightness; a control module, connected to the event detection module and the sensor module, respectively, for applying the event-based adaptive lighting energy-saving control method according to any one of claims 1 to 6 to generate a driving signal and a control signal for the lighting fixtures based on the attributes and time of the event and the brightness of the road surface; the driving signal includes a voltage value of each of the turned-on lighting fixtures; and the control signal includes the number of turned-on lighting fixtures and the interval time between turning on the lighting fixtures; A driving module, connected to the control module, for turning on or off the lighting fixture according to the driving signal; a communication module, connected to the control module and used for transmitting control signals; The independent control devices are connected via a communication module.

8. The event-based adaptive lighting energy-saving control system according to claim 7, characterized in that: Each of the independent control devices further includes a power processing module; the power processing module is used to supply power to the event detection module, the sensor module, the control module, the drive module and the communication module.

9. The event-based adaptive lighting energy-saving control system according to claim 8, characterized in that: The power processing module includes a transformer, a rectifier, a filter and a voltage conversion chip which are connected in sequence.

10. The event-based adaptive lighting energy-saving control system according to claim 7, characterized in that: Each of the independent control devices further includes a positioning module; the positioning module is connected to the control module; the positioning module is used to locate the longitude coordinates of the location of the lighting fixture.

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