Illumination control method and system based on centralized constant-voltage power supply

Abstract

The invention relates to the technical field of program control systems, in particular to an illumination control method and system based on centralized constant-voltage power supply. Comprising the following steps: S1, collecting a control turn-on signal and a control turn-off signal of the lighting equipment, and obtaining the turn-on rise time, the turn-off fall time and the total response period of the lighting equipment; based on the start-up time, the turn-off fall time and the total response period, dividing the lighting equipment into start response delay equipment, turn-off response delay equipment and overall response delay equipment; and S2, obtaining a power supply radius over-limit group and a power supply radius normal group based on the start response delay equipment, the turn-off response delay equipment and the overall response delay equipment, and extracting an ambient light interference parameter and an equipment aging attenuation parameter. Synchronous response and energy-saving stable operation of a lighting system are realized by dynamically identifying and responding slow equipment, accurately positioning a power supply group, generating a control signal in combination with environment and aging parameters and adopting a jump grouping and step strategy.

Description

Technical Field

[0001] The present invention relates to the technical field of program control systems, and in particular to a lighting control method and system based on centralized constant voltage power supply. Background Art

[0002] At present, large-space lighting systems generally adopt a distributed single-lamp control mode. Each lighting device needs to be independently configured with a driving power supply and a controller, resulting in high system complexity and multiple fault points. Traditional AC power supply has the risk of leakage, and a large number of high-altitude maintenance operations increase safety risks. Although centralized constant voltage power supply has been introduced to reduce hardware costs, there are still serious defects in the program control level: the voltage attenuation of long-distance power supply causes the edge device to respond lag, and the ambient light interference and equipment aging further amplify the timing inaccuracy; the existing technology relies on fixed threshold classification or unified advance control signals, and cannot coordinately process multi-dimensional variables such as power supply radius attenuation, environmental parameter fluctuations, and device state degradation, resulting in a disconnect between control instructions and device responses. Especially in large-scale systems, the coupling effect of voltage fluctuations and response delays exacerbates program out-of-control, which not only causes asynchronous lighting actions and energy waste, but also exacerbates the risk of high-altitude operations due to frequent maintenance. Therefore, there is an urgent need for a program control system that integrates the advantages of centralized power supply and adaptive decision-making to achieve precise coordination of instructions and responses while reducing hardware complexity. Summary of the invention

[0003] In order to overcome the disadvantage of program runaway of multi-variable coupling, the present invention provides a lighting control method and system based on centralized constant voltage power supply.

[0004] The technical implementation scheme of the present invention is: a lighting control method based on centralized constant voltage power supply, comprising the following steps: S1: Collecting a control on signal and a control off signal of the lighting device to obtain a startup rise time, a shutdown fall time and a total response cycle of the lighting device; based on the startup rise time, the shutdown fall time and the total response cycle, the lighting device is divided into a startup slow response device, a shutdown slow response device and an overall slow response device; S2: Based on the startup slow response device, the shutdown slow response device and the overall slow response device, a power supply radius exceeding limit group and a power supply radius normal group are obtained, and ambient light interference parameters and device aging attenuation parameters are extracted; based on the ambient light interference parameters and the device aging attenuation parameters, an ambient light influence degree coefficient and an aging influence degree coefficient are calculated; S3: Based on the ambient light influence coefficient and the aging influence coefficient, determine the actual control signal issuance time of the lighting device using an adaptive control formula; based on the actual control signal issuance time, perform jump grouping on the lighting devices to obtain several types of centralized constant voltage power supply groups; S4: Based on the several types of centralized constant - voltage power - supply groups, with the time when the actual control signal is sent as the benchmark, perform stepped control on the several types of centralized constant - voltage power - supply groups.

[0005] Preferably, collecting the control - on signal and control - off signal of the lighting device, and obtaining the start - up rise time, turn - off fall time, and total response period of the lighting device includes: Taking the time from when the control - on signal is sent until the brightness of the lighting device reaches the set brightness value as the start - up rise time; Taking the time from when the control - off signal is sent until the brightness of the lighting device drops to the extinction threshold as the turn - off fall time; Taking the sum of the start - up rise time and the turn - off fall time as the total response period.

[0006] Preferably, based on the start - up rise time, turn - off fall time, and total response period, classifying the lighting devices into start - up response - sluggish devices, turn - off response - sluggish devices, and overall response - sluggish devices includes: Calculating the average value and standard deviation of the start - up rise time, turn - off fall time, and total response period of N lighting devices to obtain the start - up rise time threshold, turn - off fall time threshold, and total response period threshold; If the start - up rise time of the lighting device is greater than the start - up rise time threshold, then classify the lighting device as a start - up response - sluggish device; If the turn - off fall time of the lighting device is greater than the turn - off fall time threshold, then classify the lighting device as a turn - off response - sluggish device; If the total response period of the lighting device is greater than the total response period threshold, then classify the lighting device as an overall response - sluggish device.

[0007] Preferably, based on the start - up response - sluggish devices, turn - off response - sluggish devices, and overall response - sluggish devices, obtaining the power - supply radius over - limit group and the power - supply radius normal group, and extracting the ambient light interference parameter and the device aging attenuation parameter includes: Based on the spatial positions of the start - up response - sluggish devices, turn - off response - sluggish devices, and overall response - sluggish devices, select the device distance farthest from the controller as the power - supply radius critical value; Classify the lighting devices with a distance exceeding the power - supply radius critical value into the power - supply radius over - limit group, and the remaining devices into the power - supply radius normal group; Based on the response - time difference between the power - supply radius over - limit group and the power - supply radius normal group, extract the ambient light interference parameter; Based on the response - time dispersion within the power - supply radius over - limit group and the power - supply radius normal group, extract the device aging attenuation parameter.

[0008] Preferably, calculating the environmental light influence degree coefficient and the aging influence degree coefficient based on the environmental light interference parameter and the device aging attenuation parameter includes: calculating the environmental light influence degree coefficient through the environmental light influence degree coefficient formula, and the environmental light influence degree coefficient formula is as follows,

[0010] where, is the environmental light influence degree coefficient, is the environmental light interference parameter, is the environmental light attenuation factor, is the comprehensive deviation of the response time; calculating the aging influence degree coefficient through the aging influence degree coefficient formula, and the aging influence degree coefficient formula is as follows,

[0011] where, is the aging influence degree coefficient, is the device aging attenuation parameter, is the aging enhancement factor.

[0012] Preferably, determining the actual control signal emission time of the lighting device based on the environmental light influence degree coefficient and the aging influence degree coefficient includes: the adaptive control formula is as follows,

[0013] where is the actual control signal emission time, is the reference control time, is the environmental light compensation gain, is the aging compensation gain.

[0014] Preferably, based on the actual control signal emission time, performing a jump grouping on the lighting devices to obtain several types of centralized constant voltage power supply groups, including: Marking the lighting devices with a difference between the actual control signal emission time and the reference control time greater than the compensation threshold as time-sensitive devices; Marking the lighting devices with a difference between the actual control signal emission time and the reference control time less than or equal to the compensation threshold as time-independent devices; Generating grouping grid points at fixed intervals on the spatial distribution map of all lighting devices; Randomly selecting lighting devices within a preset radius range centered on the grouping grid points to form grouping units; The grouping units simultaneously include the time-sensitive devices and the time-independent devices; Merging the groups with insufficient device numbers in adjacent grouping units to form several types of centralized constant voltage power supply groups.

[0015] Preferably, based on the several types of centralized constant - voltage power - supply groups, taking the time when the actual control signal is issued as a reference, perform stepped control on the several types of centralized constant - voltage power - supply groups, including: Calculate the proportion of time - sensitive devices in each centralized constant - voltage power - supply group, group them in ascending order according to the proportion, and generate an ordered power - supply group sequence; Taking the group with the lowest proportion as the reference group, subsequent groups increase the delay step by step according to the sorting order, and the delay time of each level is a fixed step size ; Each group of devices performs unified actions according to the group execution time, and time - sensitive devices need to additionally superimpose their own delay compensation amounts; Determine the execution time through the execution - time control formula.

[0016] Preferably, the determination of the execution time through the execution - time control formula includes: The execution - time control formula is as follows,

[0017] where, is the execution time of the th centralized constant - voltage power - supply group, is the reference control time, is the stepped - time step size, is the number of devices that need to be delayed in the group, is the total number of devices in the group, is the maximum number of stepped levels.

[0018] Preferably, the lighting control system based on centralized constant - voltage power supply includes: Device response classification module: Collect the start - stop signals of lighting devices, calculate the start - up rise time, turn - off fall time and total response period, and classify start - up - sluggish / turn - off - sluggish / overall - sluggish devices based on the mean threshold; Radius and parameter extraction module: Divide the power - supply radius over - limit groups and normal groups according to the spatial positions of the sluggish devices, and extract the response - time differences between groups and the within - group dispersion; Adaptive control grouping module: Combine the ambient - light influence coefficient and the aging influence coefficient, calculate the time when the actual control signal is issued through the adaptive formula, and perform jump - type spatial grouping based on the time - sensitive markers; Stepped execution module: Sort in ascending order according to the proportion of time - sensitive devices in the group, and increase the delay amount group by group according to the execution - time formula to achieve stepped control.

[0019] Beneficial effects: By dynamically identifying devices with slow startup response, devices with slow shutdown response, and devices with overall slow response, the present invention accurately locates the groups with over-limit power supply radius and the normal groups; based on the ambient light interference parameters and device aging attenuation parameters, integrating the ambient light influence degree coefficient and the aging influence degree coefficient, driving the adaptive control formula to generate the actual control signal emission time, effectively offsetting the timing deviation of voltage attenuation and ambient interference; using jump grouping to construct a hybrid power supply unit, forcibly coupling time-sensitive devices and time-independent devices, and suppressing the impact of sudden loads through in-group current buffering; finally, relying on the stepped control strategy, triggering the ordered power supply group sequence in ascending order of the proportion of time-sensitive devices, combining in-group compensation and inter-group peak shifting delay, realizing the millisecond-level synchronous response of a large range of lighting devices, significantly reducing grid fluctuations and improving energy utilization efficiency. Description of the Drawings

[0020] Figure 1 is a flowchart of the lighting control method based on centralized constant voltage power supply of the present invention; Figure 2 is a structural diagram of the lighting control system based on centralized constant voltage power supply of the present invention. Detailed Embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1: A lighting control method based on centralized constant voltage power supply, as Figure 1 shown, includes the following steps: S1: Collect the control start signal and control stop signal of the lighting device, and obtain the startup rise time, shutdown fall time, and total response period of the lighting device; based on the startup rise time, shutdown fall time, and total response period, divide the lighting device into a startup response slow device, a shutdown response slow device, and an overall response slow device; S2: Based on the startup response slow device, the shutdown response slow device, and the overall response slow device, obtain the group with over-limit power supply radius and the group with normal power supply radius, and extract the ambient light interference parameter and the device aging attenuation parameter; based on the ambient light interference parameter and the device aging attenuation parameter, calculate the ambient light influence degree coefficient and the aging influence degree coefficient; S3: Based on the ambient light influence degree coefficient and the aging influence degree coefficient, use the adaptive control formula to determine the actual control signal emission time of the lighting device; based on the actual control signal emission time, perform a jump grouping on the lighting device to obtain several types of centralized constant voltage power supply groups; S4: Based on the several types of centralized constant voltage power supply groups, with the actual control signal emission time as the benchmark, perform a stepped control on the several types of centralized constant voltage power supply groups.

[0023] Collect the control on signal and control off signal of the lighting device to obtain the start-up rise time, turn-off fall time and total response period of the lighting device, including: Use the time from the emission of the control on signal to the moment when the brightness of the lighting device reaches the set brightness value as the start-up rise time; Use the time from the emission of the control off signal to the moment when the brightness of the lighting device drops to the extinction threshold as the turn-off fall time; Use the sum of the start-up rise time and the turn-off fall time as the total response period.

[0024] It should be noted that in a large-scale lighting system with centralized power supply, due to line voltage drop, ambient light interference or aging, the response to control instructions by remote devices often shows delays or out-of-sync; this solution clearly defines three core performance parameters, laying a foundation for subsequent identification of devices with slow response (slow start-up, slow turn-off, overall slow).

[0025] Data acquisition method: Start-up rise time: from the moment when the controller issues the "on" instruction to the moment when the device brightness rises to the preset value (such as 1000 (lux)); Turn-off fall time: from the moment when the controller issues the "off" instruction to the moment when the device brightness drops to the extinction threshold (such as 50 (lux)); Total response period: automatically calculate the sum of the above two times.

[0026] Example: For example, after a lamp receives the "on" signal, it takes 200 milliseconds to go from 0 to 1000 (lux) (start-up rise time); after receiving the "off" signal, it takes 80 milliseconds to go from 1000 (lux) to 50 (lux) (turn-off fall time); the total response period is 280 milliseconds.

[0027] Based on the start-up rise time, turn-off fall time and total response period, classify the lighting devices into start-up response slow devices, turn-off response slow devices and overall response slow devices, including: Calculate the average value and standard deviation of the start-up rise time, turn-off fall time and total response period of N lighting devices to obtain the start-up rise time threshold, turn-off fall time threshold and total response period threshold; If the start-up rise time of the lighting device is greater than the start-up rise time threshold, classify the lighting device as a start-up response slow device; If the turn-off decay time of the lighting device is greater than the turn-off decay time threshold, the lighting device is classified as a device with a slow turn-off response. If the total response period of the lighting device is greater than the total response period threshold, the lighting device is classified as a device with an overall slow response.

[0028] It should be noted that the calculation formula for the turn-on rise time threshold is as follows.

[0029] Where is the turn-on rise time threshold, is the average turn-on rise time, is the standard deviation of the turn-on rise time, is the sensitivity coefficient; The calculation formula for the turn-off decay time threshold is as follows.

[0031] Where is the turn-off decay time threshold, is the average turn-off decay time, is the standard deviation of the turn-off decay time; The calculation formula for the total response period threshold is as follows.

[0032] Where is the total response period threshold, is the average total response period, is the standard deviation of the total response period; Dynamically set the judgment criteria for slow response through statistical methods: calculate the average value of the response times of all devices (reflecting the overall performance level), calculate the standard deviation (quantifying the performance differences between devices), threshold = average value + k × standard deviation, ensuring that only abnormally slow devices are marked; classify and identify three types of problem devices: slow start, slow turn-off, and overall slow.

[0033] Illustrated by an example, taking the warehouse scenario as an example: calculate the average value and standard deviation: turn-on rise time: = 210ms, = 80ms, take k = 1.8 → = 210 + 1.8×80 = 354 ms. Equipment classification: Equipment A (edge): Startup time 350 ms < 354 ms → Normal; Equipment B (aging): Startup time 380 ms > 354 ms → Slow startup response; Equipment C (fault): Shutdown time 320 ms > threshold 285 ms → Slow shutdown response; Control optimization: Equipment B is sent a startup signal 230 ms in advance, and Equipment C is instructed to execute the shutdown instruction 150 ms later. The overall synchronization error is reduced from > 200 ms to < 50 ms.

[0034] Based on the equipment with slow startup response, the equipment with slow shutdown response, and the equipment with overall slow response, obtain the group with excessive power supply radius and the group with normal power supply radius, and extract the ambient light interference parameter and the equipment aging attenuation parameter, including: Based on the spatial positions of the equipment with slow startup response, the equipment with slow shutdown response, and the equipment with overall slow response, select the distance of the equipment farthest from the controller as the critical value of the power supply radius; Classify the lighting equipment with a distance exceeding the critical value of the power supply radius into the group with excessive power supply radius, and classify the remaining equipment into the group with normal power supply radius; Based on the response time difference between the group with excessive power supply radius and the group with normal power supply radius, extract the ambient light interference parameter; Based on the response time dispersion within the group of the group with excessive power supply radius and the group with normal power supply radius, extract the equipment aging attenuation parameter.

[0035] It should be noted that the response time difference refers to the difference in the average response time between the group with excessive power supply radius and the normal group, which is used to quantify the ambient light interference intensity; The response time dispersion refers to the standard deviation of the response times of the equipment within the same power supply group, which is used to characterize the aging dispersion degree of the devices.

[0036] Separate the power supply radius and the environmental / aging factors through the coupled analysis of spatial position and response characteristics: Critical value of the power supply radius: Select the distance of the farthest slow equipment (such as 50 meters) to ensure that the excessive group includes all areas with severe voltage attenuation; Ambient light interference parameter: Since the excessive group is close to the window, its average response delay is significantly higher than that of the normal group (the difference quantifies the light interference intensity); Aging attenuation parameter: The standard deviation of the response times of the equipment within the same group (such as σ = 85 ms in the excessive group), which reflects the aging dispersion degree of the devices (the larger the standard deviation, the more severe the aging difference).

[0037] Example illustration (continuing from the previous example), spatial grouping: the farthest device with slow startup is 55 meters away from the controller → power supply radius critical value = 55 meters, overlimit group: 32 lights (> 55 meters area, near the window), normal group: 88 lights (≤ 55 meters area), parameter extraction: response time difference: average startup time of overlimit group 380ms - normal group 260ms = 120ms → ambient light interference parameter, response time dispersion: standard deviation of startup time within the overlimit group σ = 85ms → equipment aging attenuation parameter; the formula for response time difference is as follows,

[0038] where, is the average response time (ms) of the overlimit group for the power supply radius, is the average response time (ms) of the normal group for the power supply radius, is the ambient light interference parameter (the larger the difference, the stronger the impact of ambient light); the formula for response time dispersion is as follows,

[0039] where, is the response time of a single device within the group (ms), is the average response time of this group (ms), is the number of devices within the group, is the equipment aging attenuation parameter (the larger the standard deviation, the more significant the aging difference).

[0040] Based on the ambient light interference parameter and the equipment aging attenuation parameter, calculate the ambient light influence degree coefficient and the aging influence degree coefficient, including: Calculate the ambient light influence degree coefficient through the ambient light influence degree coefficient formula, and the ambient light influence degree coefficient formula is as follows,

[0041] where, is the ambient light influence degree coefficient, is the ambient light interference parameter, is the ambient light attenuation factor, is the comprehensive deviation of response time; calculate the aging influence degree coefficient through the aging influence degree coefficient formula, and the aging influence degree coefficient formula is as follows,

[0042] where, is the aging influence degree coefficient, is the equipment aging attenuation parameter, is the aging enhancement factor.

[0043] It should be noted that the comprehensive deviation of the response time refers to the weighted comprehensive offset of the start-up, shutdown, and total response time of the lighting device relative to the system mean value, which is used to evaluate the degree of individual abnormality.

[0044] If , it is determined that the ambient light interference is dominant, is the ambient light dominant threshold; If , it is determined that the device aging is dominant, is the aging dominant threshold.

[0045] Ambient light influence degree coefficient ( ): Exponential decay model indicates that the device's own abnormality ( ) will weaken the performance of ambient light interference; Example: Devices near the window have a slow response due to sunlight interference, but if their own performance is good ( is small), then increases significantly Aging influence degree coefficient ( ): ( ) indicates that the aging problem becomes prominent as the device abnormality degree increases; Example: Even if the aging device is not near the window, due to being large, it still makes increase; Determination of the dominant factor: (such as > 2.0 → ambient light dominant → need dimming compensation; (such as > 1.5 → aging dominant → need delay compensation; Example (continuing the previous example), device data: Device near the window edge: = 120ms, = 0.3 (mild abnormality), internally aging device: = 85ms, = 0.8 (severe abnormality), calculation (assuming = = 1): Device near the window: = 0.78; ; → ambient light dominant → reduce the reference brightness by 30%; Internally aging device: = 0.68;; → mixed factors → superposition compensation (delay 150ms + brightness fine-tuning 5%); The formula for the comprehensive deviation of the response time is as follows,

[0046] Among them, and are the start-up rise time, shutdown fall time, and total response cycle respectively, and the weights + + = 1, the greater the anomaly the closer it is to 1.

[0047] Based on the environmental light influence degree coefficient and the aging influence degree coefficient, use the adaptive control formula to determine the actual control signal emission time of the lighting device, including: The adaptive control formula is as follows,

[0048] where, is the actual control signal emission time, is the reference control time, is the environmental light compensation gain, is the aging compensation gain.

[0049] It should be noted that the adaptive formula dynamically adjusts the signal emission time to solve the timing misalignment caused by environmental light and aging: Environmental light compensation term: , strengthen the early triggering of devices with high environmental light interference (such as devices near the window need to be lit earlier), suppress the overcompensation of self-abnormal devices ( is large); Aging compensation term: linearly amplify the aging influence ( ), add a delayed turn-off to aging devices, ensure that severely abnormal devices ( is large) obtain sufficient compensation, reference time: is the theoretical control time under ideal conditions.

[0050] Example illustration (continuing the previous example) parameter setting: = 0ms (reference time), = 50, = 30, = = 1; Devices near the window (dominated by environmental light, = 0.78, = 0.3): ; = → Turn on 21.4ms earlier (compensate for sunlight interference); Internally aging devices ( = 0.68, = 0.8): ; = 15.2ms → Turn off 15.2ms later (avoid afterglow residue).

[0051] Based on the actual control signal emission time, perform a jump grouping on the lighting devices to obtain several types of centralized constant-voltage power supply groups, including: Mark the lighting devices with a difference between the actual control signal emission time and the reference control time greater than the compensation threshold as time-sensitive devices; Mark the lighting devices with a difference between the actual control signal emission time and the reference control time less than or equal to the compensation threshold as time-independent devices; On the spatial distribution map of all lighting devices, generate grouping grid points at fixed intervals; Centered on the grouping grid points, randomly select lighting devices within a preset radius to form grouping units; The grouping units simultaneously include the time-sensitive devices and the time-independent devices; Merge the groups with insufficient device numbers in adjacent grouping units to form several types of centralized constant-voltage power supply groups.

[0052] It should be noted that through the spatio-temporal decoupling grouping strategy, the problem of collaborative out-of-control caused by the interweaving of voltage fluctuations and response differences is solved: Time-sensitive marking: Distinguish high-compensation-demand devices (sensitive) from stable devices (independent) based on the adaptive compensation amount (the difference from the reference time); Jump spatial grouping: The fixed grid breaks the physical proximity constraint; Randomly select devices within the preset radius, and force mixed grouping (coexistence of sensitive + independent devices); Group structure optimization: Merge small units to form power supply groups of moderate scale to ensure constant-voltage stability; Core value: The sudden loads of sensitive devices are buffered by the independent devices within the group, and spatial dispersion avoids local voltage collapse.

[0053] Example illustration, in a large-scale warehouse lighting system: Marking result: Devices in the near-window area (need to be turned on in advance due to sunlight interference) → Time-sensitive devices; Devices in the internal core area (stable response) → Time-independent devices; Grouping scenario: Centered on virtual grid points; Random selection: 1 near-window sensitive device + 2 shelf area independent devices + 1 aisle aging device; Form a mixed power supply unit; Operation dynamics: When the sensitive device acts in advance, the independent device provides current buffering; At the same time, the delayed turn-off requirement of the aging device is coordinated within the group.

[0054] Based on the several types of centralized constant-voltage power supply groups, with the actual control signal emission time as the reference, perform stepped control on the several types of centralized constant-voltage power supply groups, including: Calculate the proportion of time-sensitive devices in each centralized constant-voltage power supply group, arrange the groups in ascending order according to the proportion, and generate an ordered power supply group sequence; Taking the group with the lowest proportion as the reference group, the subsequent groups increase the delay step by step according to the sorting order, and the delay time for each level is a fixed step ; Each group of devices performs actions uniformly according to the group execution time. Time-sensitive devices need to additionally superimpose their own delay compensation amounts. The execution time is determined by the execution time control formula.

[0055] It should be noted that the stepped control achieves global synchronization through inter-group peak shaving execution and intra-group collaborative compensation: Group sorting logic: Sort in ascending order according to the proportion of time-sensitive devices. The group with a low proportion (high stability) executes first and serves as the reference time sequence anchor point; Stepped delay superposition: Subsequent groups gradually increase the fixed step delay (δ) according to the sorting order, forming a wavy action sequence to disperse the grid impact; Intra-group double compensation: The whole group executes the basic action at the unified time; Time-sensitive devices additionally superimpose their own compensation amounts (such as advancing / delaying).

[0056] Example: There are 5 constant-voltage power supply groups (G1 - G5) in a warehouse, and the proportion of time-sensitive devices in each group is: G1(40%), G2(15%), G3(60%), G4(25%), G5(10%). Let the fixed step δ = 50ms.

[0057] Steps: Sorting: Sort in ascending order according to the proportion: G5(10%) → G2(15%) → G4(25%) → G1(40%) → G3(60%). Reference and delay: G5 executes at the reference time T. Subsequent groups are delayed in turn: G2 executes at T + 50ms, G4 executes at T + 100ms, G1 executes at T + 150ms, and G3 executes at T + 200ms. Intra-group actions: For example, the devices in group G1 perform actions uniformly at the moment of T + 150ms. However, the devices marked as "time-sensitive" in group G1 (accounting for 40%) need to additionally add or subtract their own specific compensation time amounts (such as advancing 20ms or delaying 30ms) on the basis of T + 150ms.

[0058] The execution time is determined by the execution time control formula, including: The execution time control formula is as follows,

[0059] Among them, is the execution time of the centralized constant-voltage power supply group, which is the reference control time, is the stepped time step, is the number of devices that need to be delayed in the group, is the total number of devices in the group, and is the maximum stepped level number.

[0060] It should be noted that the formula is used to dynamically calculate the execution time of each group of lighting devices to achieve stepped peak shaving control: Core logic: Map the proportion of devices that need to be delayed in the group ( ) to the discrete stepped levels (by rounding), and then multiply by the fixed step , superimposed on the reference time . Function: Disperse the power grid load: The delay between groups increases according to the step level to avoid voltage fluctuations caused by simultaneous actions; Adaptive grouping: The group with a high proportion of delayed devices is assigned a larger delay amount, and the stable group (low proportion group) is given priority to execute.

[0061] Example illustration: Assume the parameters of a certain power supply group: = 4 (number of devices requiring delay), = 10 (total number of devices in the group), = 5 (maximum step level), = 50 ms (step size), = 0 ms (reference time). Calculation process: Calculate the delay ratio: 4 / 10 = 0.4, map the step level: , execution time: = 0 + 50×2 = 100 ms. Result: All devices in this group execute actions at the 100 ms moment uniformly, and time-sensitive devices are additionally superimposed with their own compensation amounts (such as advanced / delayed).

[0062] Embodiment 2: On the basis of Embodiment 1, for a lighting control system based on centralized constant-voltage power supply, as Figure 2 shown, it includes: Device response classification module: Collect the start / stop signals of lighting devices, calculate the start-up rise time, turn-off fall time, and total response cycle, and classify start-up slow / drop-off slow / overall slow devices based on the mean threshold; Radius and parameter extraction module: Divide the power supply radius overrun group and the normal group according to the spatial positions of the slow devices, and extract the response time difference between groups and the within-group dispersion; Adaptive control grouping module: Combine the ambient light influence coefficient and the aging influence coefficient, calculate the actual control signal emission time through an adaptive formula, and perform jump-type spatial grouping based on the time-sensitive mark; Step execution module: Sort in ascending order according to the proportion of time-sensitive devices within the group, and increase the delay amount group by group with the execution time formula to achieve step control.

[0063] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lighting control method based on centralized constant voltage power supply, characterized in that Including the following steps: S1: Collect the control turn-on signal and control turn-off signal of the lighting device, and obtain the start-up rise time, turn-off fall time, and total response period of the lighting device; Based on the start-up rise time, turn-off fall time, and total response period, classify the lighting device into a start-up response slow device, a turn-off response slow device, and an overall response slow device; S2: Based on the start-up response slow device, turn-off response slow device, and overall response slow device, obtain a power supply radius overlimit group and a power supply radius normal group, and extract the ambient light interference parameter and device aging attenuation parameter; Based on the ambient light interference parameter and the device aging attenuation parameter, calculate the ambient light influence degree coefficient and the aging influence degree coefficient; S3: Based on the ambient light influence degree coefficient and the aging influence degree coefficient, use the adaptive control formula to determine the actual control signal emission time of the lighting device; Based on the actual control signal emission time, perform a jump grouping on the lighting device to obtain several types of centralized constant voltage power supply groups; S4: Based on the several types of centralized constant voltage power supply groups, perform a stepped control on the several types of centralized constant voltage power supply groups with the actual control signal emission time as the reference.

2. The lighting control method based on centralized constant voltage power supply according to claim 1, characterized in that The collecting the control turn-on signal and control turn-off signal of the lighting device, and obtaining the start-up rise time, turn-off fall time, and total response period of the lighting device includes: Taking the time from the emission of the control turn-on signal to the lighting device reaching the set brightness value as the start-up rise time; Taking the time from the emission of the control turn-off signal to the lighting device's brightness dropping to the extinction threshold as the turn-off fall time; Taking the sum of the start-up rise time and the turn-off fall time as the total response period.

3. The lighting control method based on centralized constant voltage power supply according to claim 1, characterized in that The classifying the lighting device into a start-up response slow device, a turn-off response slow device, and an overall response slow device based on the start-up rise time, turn-off fall time, and total response period includes: Calculating the average value and standard deviation of the start-up rise time, turn-off fall time, and total response period of N lighting devices to obtain the start-up rise time threshold, turn-off fall time threshold, and total response period threshold; If the start-up rise time of the lighting device is greater than the start-up rise time threshold, classify the lighting device as a start-up response slow device; If the turn-off fall time of the lighting device is greater than the turn-off fall time threshold, classify the lighting device as a turn-off response slow device; If the total response period of the lighting device is greater than the total response period threshold, classify the lighting device as an overall response slow device.

4. The lighting control method based on centralized constant voltage power supply according to claim 1, characterized in that The obtaining a power supply radius overlimit group and a power supply radius normal group, and extracting the ambient light interference parameter and device aging attenuation parameter based on the start-up response slow device, turn-off response slow device, and overall response slow device includes: Based on the spatial positions of the start-up response slow device, turn-off response slow device, and overall response slow device, select the device distance farthest from the controller as the power supply radius critical value; Classify the lighting devices with a distance exceeding the power supply radius critical value into the power supply radius overlimit group, and the remaining devices into the power supply radius normal group; Extract the ambient light interference parameter based on the response time difference between the over-limit power supply radius group and the normal power supply radius group; Extract the equipment aging attenuation parameter based on the response time dispersion within the over-limit power supply radius group and the normal power supply radius group.

5. The lighting control method based on centralized constant voltage power supply according to claim 1, characterized in that, Calculating the ambient light influence degree coefficient and the aging influence degree coefficient based on the ambient light interference parameter and the equipment aging attenuation parameter includes: calculating the ambient light influence degree coefficient through the ambient light influence degree coefficient formula, and the ambient light influence degree coefficient formula is as follows, ； wherein, is the environmental light influence degree coefficient, is the environmental light interference parameter, is the environmental light attenuation factor, is the comprehensive deviation of response time; the aging influence degree coefficient is calculated by the aging influence degree coefficient formula, and the aging influence degree coefficient formula is as follows, ; Among them, is the aging influence degree coefficient, is the equipment aging attenuation parameter, is the aging enhancement factor.

6. The lighting control method based on centralized constant voltage power supply according to claim 1, characterized in that, Determining the actual control signal emission time of the lighting equipment based on the ambient light influence degree coefficient and the aging influence degree coefficient by using the adaptive control formula includes: the adaptive control formula is as follows, ； Among them, is the actual control signal emission time, is the reference control time, is the ambient light compensation gain, is the aging compensation gain.

7. The lighting control method based on centralized constant voltage power supply according to claim 1, characterized in that, Based on the actual control signal emission time, perform a jump grouping on the lighting equipment to obtain several types of centralized constant voltage power supply groups, including: Mark the lighting equipment with the difference between the actual control signal emission time and the reference control time greater than the compensation threshold as time-sensitive equipment; Mark the lighting equipment with the difference between the actual control signal emission time and the reference control time less than or equal to the compensation threshold as time-independent equipment; On the spatial distribution map of all lighting equipment, generate grouping grid points at fixed intervals; Taking the grouping grid points as the center, randomly select lighting equipment within a preset radius to form a grouping unit; The grouping unit contains both the time-sensitive equipment and the time-independent equipment; Merge the groups with insufficient equipment quantity in adjacent grouping units to form several types of centralized constant voltage power supply groups.

8. The lighting control method based on centralized constant voltage power supply according to claim 1, characterized in that, Based on the several types of centralized constant voltage power supply groups, perform a stepped control on the several types of centralized constant voltage power supply groups with the actual control signal emission time as the reference, including: Calculate the proportion of time-sensitive equipment in each centralized constant voltage power supply group, sort the groups in ascending order according to the proportion, and generate an ordered power supply group sequence; Taking the group with the lowest proportion as the reference group, the subsequent groups increase the delay step by step according to the sorting order, and the delay time of each level is a fixed step size ; Each group of equipment performs unified actions according to the group execution time, and the time-sensitive equipment needs to additionally superimpose its own delay compensation amount; Determine the execution time through the execution time control formula.

9. The lighting control method based on centralized constant voltage power supply according to claim 8, characterized in that The determination of the execution time through the execution time control formula includes: the execution time control formula is as follows, ； Among them, is the execution time of the centralized constant voltage power supply group, is the reference control time, is the step time step, is the number of devices that need to be delayed in the group, is the total number of devices in the group, is the maximum number of steps. is the maximum number of steps.

10. A lighting control system based on centralized constant voltage power supply, which is used to implement the lighting control method based on centralized constant voltage power supply according to any one of claims 1-9, characterized in that, Including: Equipment response classification module: Collect the start-stop signals of the lighting equipment, calculate the start-up rise time, turn-off fall time and total response cycle, and classify the start-up slow / turn-off slow / overall slow equipment based on the mean threshold; Radius and parameter extraction module: Divide the over-limit power supply radius group and the normal group according to the spatial positions of the slow equipment, and extract the response time difference between groups and the dispersion within groups; Adaptive control grouping module: Combine the ambient light influence coefficient and the aging influence coefficient, calculate the actual control signal emission time through the adaptive formula, and perform jump spatial grouping based on the time-sensitive mark; Stepped execution module: Sort in ascending order according to the proportion of time-sensitive equipment in the group, and gradually increase the delay amount for each group according to the execution time formula to achieve stepped control.

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