LED integrated module direct current illumination control method and system

Abstract

The invention relates to the technical field of LED lamps, in particular to an LED integrated module direct current illumination control method and system, and the method comprises the steps: collecting the historical operation data of a to-be-detected LED lamp in an LED integrated module and the electrical data of a direct current bus; determining a plurality of lightening durations and power standard-reaching durations of the to-be-detected LED lamp based on the historical operation data of the to-be-detected LED lamp; determining the energy loss degree of the to-be-detected LED lamp based on the plurality of lightening durations and the plurality of power standard-reaching durations; correcting the energy loss degree based on the electrical parameters of the direct current bus in the plurality of power standard-reaching durations to obtain a power regulation and control coefficient; and performing power regulation and control on the to-be-detected LED lamp based on the power regulation and control coefficient. According to the method, the output power of the to-be-detected LED lamp can be accurately regulated and controlled, and the illumination quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED lamps, in particular to a LED integrated module direct current lighting control method and system. BACKGROUND

[0002] During the use of LED lamps, the internal driver aging can cause the light flux to decrease and the response to delay. In order to maintain the lighting quality, it is usually necessary to compensate the driving power.

[0003] However, the existing compensation technology is difficult to distinguish whether the performance decrease is caused by the internal device aging or the external power grid fluctuation. If the external power grid fluctuation is mistakenly judged as aging and the power is blindly increased, not only the lighting quality cannot be improved, but also the invalid energy waste and equipment overheating are caused. SUMMARY

[0004] The present application aims to provide a LED integrated module direct current lighting control method and system, which aims to solve the technical problems of inaccurate power compensation, low energy utilization rate and decreased lighting quality caused by the inability to accurately distinguish the internal aging of the LED module and the external power supply interference in the prior art, and the technical scheme adopted is as follows: The present application provides a LED integrated module direct current lighting control method, comprising: collecting historical operation data of a to-be-detected LED lamp in a LED integrated module and electrical data of a direct current bus; determining a plurality of lighting durations and power compliance durations of the to-be-detected LED lamp based on the historical operation data of the to-be-detected LED lamp, one lighting duration being a duration between sensing a person and lighting of the to-be-detected LED lamp in one lighting process, and one power compliance duration being a duration between lighting and reaching a rated power of the to-be-detected LED lamp in one lighting process; determining an energy loss degree of the to-be-detected LED lamp based on the plurality of lighting durations and the plurality of power compliance durations; correcting the energy loss degree based on electrical parameters of the direct current bus in the plurality of power compliance durations to obtain a power regulation coefficient; and regulating the power of the to-be-detected LED lamp based on the power regulation coefficient.

[0005] Optionally, the historical operation data includes a sensing time, a lighting time and a rated power time of the to-be-detected LED lamp in a plurality of lighting processes, and the determination of the plurality of lighting durations and the power compliance durations of the to-be-detected LED lamp based on the historical operation data of the to-be-detected LED lamp comprises: determining a duration between the sensing time and the lighting time in each lighting process as the lighting duration in each lighting process, the sensing time being a time when the to-be-detected LED lamp senses a person; and determining a duration between the lighting time and the rated power time in each lighting process as the power compliance duration in each lighting process, the rated power time being a time when the to-be-detected LED lamp initially reaches the rated power.

[0006] Optionally, the energy loss degree of the LED lamp under test is determined based on the average value of the plurality of lighting durations and the absolute value of the difference between the lighting durations in each two adjacent lighting processes, the delay fluctuation of the LED lamp under test is determined; the standard deviation of the plurality of power compliance durations is used to determine the light output fluctuation of the LED lamp under test; and the energy loss degree is determined based on the delay fluctuation and the light output fluctuation of the LED lamp under test.

[0007] Optionally, the electrical parameters include current and voltage, and the energy loss degree is corrected based on the electrical parameters of the DC bus in the plurality of power compliance durations to obtain the power regulation coefficient, which includes: determining the current sequence and the voltage sequence of the DC bus in each power compliance duration; determining the external interference correction factor of the LED lamp under test based on the changes of the current sequence and the voltage sequence in the plurality of power compliance durations; and correcting the energy loss degree based on the external interference correction factor to obtain the power regulation coefficient.

[0008] Optionally, the external interference correction factor of the LED lamp under test is determined based on the changes of the current sequence and the voltage sequence in the plurality of power compliance durations, which includes: determining the voltage fluctuation intensity of the DC bus in each power compliance duration based on the voltage sequence in each power compliance duration; determining the power conservation deviation of the LED lamp under test based on the voltage sequence and the current sequence in each power compliance duration; and determining the external interference correction factor of the LED lamp under test based on the voltage fluctuation intensity and the power conservation deviation in each power compliance duration.

[0009] Optionally, the power regulation of the LED lamp under test based on the power regulation coefficient includes: obtaining the current actual output power of the LED lamp under test; correcting the current actual output power based on the power regulation coefficient to obtain a target output power; and controlling the operation of the LED lamp under test based on the target output power.

[0010] Optionally, the method further includes: obtaining the actual output power of all LED lamps in the LED integrated module at a plurality of collection time points in a historical time period; determining the absolute value of the difference between the actual output power and the rated power of each LED lamp at each collection time point; determining the average rated difference of each LED lamp based on the average value of the absolute value of the difference between the actual output power and the rated power of each LED lamp at a plurality of collection time points; and determining the LED lamp under test from the LED integrated module based on the average rated difference of each LED lamp.

[0011] Optionally, the determining the LED lamp to be detected from the LED integrated module based on the average rated difference of each LED lamp comprises: arranging the average rated differences of all the LED lamps in descending order to obtain a difference sequence; determining absolute values of differences between adjacent average rated differences in the difference sequence; determining a difference threshold as a mean value of target adjacent average rated differences, the target adjacent average rated differences being adjacent average rated differences with the maximum absolute values of the differences; and determining the LED lamp with the average rated difference greater than the difference threshold as the LED lamp to be detected.

[0012] Optionally, after the power regulation coefficient is used to regulate the power of the LED lamp to be detected, the method further comprises: obtaining the lighting duration and the power compliance duration of the LED lamp to be detected in at least two subsequent lighting processes; determining whether the current regulation is compliant based on the lighting duration and the power compliance duration in the at least two lighting processes; and in the case that the current regulation is not compliant, re-determining the power regulation coefficient and regulating the power of the LED lamp to be detected based on the re-determined power regulation coefficient.

[0013] The application also provides an LED integrated module direct-current lighting control system, which comprises a data acquisition unit, a data processing unit and a power execution unit. The data acquisition unit is configured to acquire historical operation data of an LED lamp to be detected in an LED integrated module and electrical data of a direct-current bus. The data processing unit is configured to determine a plurality of lighting durations and power compliance durations of the LED lamp to be detected based on the historical operation data of the LED lamp to be detected. One lighting duration is a duration from sensing a person to lighting of the LED lamp to be detected in one lighting process, and one power compliance duration is a duration from lighting to reaching a rated power of the LED lamp to be detected in one lighting process. The data processing unit is further configured to determine an energy loss degree of the LED lamp to be detected based on the plurality of lighting durations and the plurality of power compliance durations. The data processing unit is further configured to correct the energy loss degree based on electrical parameters of the direct-current bus in the plurality of power compliance durations to obtain a power regulation coefficient. The power execution unit is configured to regulate the power of the LED lamp to be detected based on the power regulation coefficient.

[0014] The application has the following beneficial effects: The application can accurately eliminate the interference of direct-current bus voltage fluctuation on aging evaluation by introducing an external interference correction factor. This makes the power regulation coefficient compensate only for the real internal device degradation, avoiding false overcompensation due to external power grid fluctuations. Compared with the traditional constant luminous flux control, the application effectively eliminates invalid power output while ensuring the lighting quality throughout the life cycle, achieving energy efficiency optimization at the system level. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 A method flow chart of an LED integrated module direct current lighting control method provided by an embodiment of the present application; Figure 2 A method flow chart of another LED integrated module direct current lighting control method provided by an embodiment of the present application; Figure 3 A structure diagram of an LED integrated module direct current lighting control system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0017] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined invention purposes, the specific embodiments, structures, features and effects of the LED integrated module direct current lighting control method and system according to the present application are described in detail below in combination with the drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0019] Promoting energy saving and emission reduction in the industry and achieving sustainable development has become an important path, which not only helps to alleviate the power supply pressure during the peak electricity consumption period, but also helps to ensure the overall stability of the power grid. In this context, the energy saving effect of LED lighting in industrial scenarios is increasingly attracting widespread attention. Detection of LED lamp lighting loss has become a key link to ensure the effectiveness of energy saving and emission reduction.

[0020] In the intelligent LED lamp sensing system, the LED integrated module, as the intelligent terminal of the lighting system regulation and control, controls the whole process from "input" to "effective light output" of energy. Its goal is to obtain the most, most durable and most accurate effective light with the least energy input. However, there may be some LED lamps in the LED integrated module that take too long to reach the rated power after sensing people, causing energy loss. Therefore, the start-up response in the LED system needs to be regulated and controlled so that the energy loss is maintained within a controllable range.

[0021] The application provides an LED integrated module direct current lighting control method and system.

[0022] Please refer to Figure 1 , which shows a method flowchart of the LED integrated module direct current lighting control method provided by an embodiment of the application.

[0023] As Figure 1 shown, the LED integrated module direct current lighting control method comprises S101-S105.

[0024] S101, historical operation data of a to-be-detected LED lamp in an LED integrated module and electrical data of a direct current bus are collected.

[0025] It should be understood that the to-be-detected LED lamp is a sensing lamp, which is immediately started and begins to illuminate when a person is sensed by an infrared sensor. The purpose of safety, energy saving and automation is achieved. The direct current bus is a common power trunk for supplying power to the entire LED integrated module.

[0026] Optionally, the to-be-detected LED lamp can be an LED lamp with energy loss in the LED integrated module, or can be any LED lamp in the LED integrated module.

[0027] It should be understood that the historical operation data of the to-be-detected LED lamp comprises operation data at multiple collection time points in a historical time period.

[0028] Optionally, the historical operation data can comprise current, voltage and power, and the electrical data of the direct current bus can comprise current and voltage of the direct current bus.

[0029] Optionally, the historical time period can be determined according to the number of times of lighting of the to-be-detected LED lamp, for example, the historical time period needs to ensure that at least 50 lighting data are collected.

[0030] Optionally, since the to-be-detected LED lamp is a sensing lamp, the historical operation data further comprises a time point at which the to-be-detected LED lamp (specifically, a human body infrared sensor) senses a person and a time point at which the to-be-detected LED lamp receives a lighting instruction.

[0031] Optionally, the time point at which the person is sensed can be determined by monitoring stable jumping (usually from low to high) of an output level of the human body infrared sensor.

[0032] S102, multiple lighting durations of the to-be-detected LED lamp and a power compliance duration are determined based on the historical operation data of the to-be-detected LED lamp.

[0033] wherein, one lighting duration is a duration from the time when the LED lamp under test senses a person to the time when the LED lamp under test is lit in one lighting process, and one power reaching duration is a duration from the time when the LED lamp under test is lit to the time when the LED lamp under test reaches the rated power in one lighting process.

[0034] It should be understood that one lighting process represents one lighting.

[0035] In an optional implementation, the historical running data includes the sensing time, the lighting time and the rated power time of the LED lamp under test in multiple lighting processes, the sensing time is the time when the LED lamp under test senses a person, the lighting time is the time when the LED lamp under test receives a lighting instruction, and the rated power time is the time when the LED lamp under test reaches the rated power for the first time.

[0036] Optionally, the duration between the sensing time and the lighting time in each lighting process can be determined as the lighting duration in each lighting process, and the duration between the lighting time and the rated power time in each lighting process can be determined as the power reaching duration in each lighting process.

[0037] It should be understood that the lighting duration represents the response speed of the LED lamp under test, and if the durations of multiple lighting durations of the LED lamp under test fluctuate greatly, it indicates that the response of the LED lamp under test is delayed. The power reaching duration represents the ability of the LED lamp to stably output light, and if the differences of multiple power reaching durations of the LED lamp under test are large, it indicates that the LED lamp under test has unstable light output, and the internal power management or constant current driving circuit of the LED lamp under test may be abnormal.

[0038] S103, determining the energy loss degree of the LED lamp under test based on the multiple lighting durations and the multiple power reaching durations.

[0039] It should be understood that the energy loss degree is used to represent the degree of energy loss of the LED lamp under test due to the recession of internal components.

[0040] In an implementation of the embodiments of the present application, the delay fluctuation of the LED lamp under test can be determined based on the average value of the multiple lighting durations and the absolute value of the difference of the lighting durations between every two adjacent lighting processes, the light output fluctuation of the LED lamp under test can be determined based on the standard deviation of the multiple power reaching durations, and then the energy loss degree can be determined based on the delay fluctuation and the light output fluctuation of the LED lamp under test.

[0041] It should be understood that the delay fluctuation of the LED lamp under test is used to represent the degree of fluctuation of the delay time from the sensing to the lighting, and the greater the delay fluctuation, the more intense the fluctuation of the delay time.

[0042] Optionally, the delay fluctuation of one LED lamp under test satisfies the following formula:

[0043] wherein, represents the delay variability of the LED lamp to be detected, represents the first lighting duration of the LED lamp to be detected, represents the first lighting duration of the LED lamp to be detected, represents the first lighting duration of the LED lamp to be detected, represents the first lighting duration of the LED lamp to be detected, represents the first lighting duration of the LED lamp to be detected, represents the first lighting duration of the LED lamp to be detected, represents the first lighting duration of the LED lamp to be detected, represents the number of lighting durations, represents a normalization function, for example, max-min normalization, for mapping values to the range [0, 1] and eliminating the dimension effect.

[0044] In combination with the formula, it should be understood that, represents the delay variability of the LED lamp to be detected, the larger the value, the longer the lighting duration of the LED lamp to be detected; represents the delay variability of the LED lamp to be detected, the larger the value, the longer the lighting duration of the LED lamp to be detected; represents the instability and volatility of the response duration of the LED lamp to be detected in the process of continuous multiple starts, the larger the value, the greater the volatility of the response time of the LED lamp to be detected; represents the instability and volatility of the response duration of the LED lamp to be detected in the process of continuous multiple starts, the larger the value, the greater the volatility of the response time of the LED lamp to be detected; represents the instability and volatility of the response duration of the LED lamp to be detected in the process of continuous multiple starts, the larger the value, the greater the volatility of the response time of the LED lamp to be detected; represents the instability and volatility of the response duration of the LED lamp to be detected in the process of continuous multiple starts, the larger the value, the greater the volatility of the response time of the LED lamp to be detected; represents the instability and volatility of the response duration of the LED lamp to be detected in the process of continuous multiple starts, the larger the value, the greater the volatility of the response time of the LED lamp to be detected;

[0045] It should be noted that the multiple lighting durations are at least two lighting durations, is an integer greater than or equal to 2.

[0046] It should be understood that the standard deviation of the multiple power compliance durations can reflect the fluctuation degree of the light output of the LED lamp to be detected, the larger the standard deviation, the more serious the situation that the LED lamp to be detected takes different lengths of time to reach the rated power, which implies that the internal driving circuit of the LED lamp to be detected has a large fluctuation in the ability to establish and maintain stable output power, which is an important representation of the performance degradation of internal components. Therefore, the greater the light output variability, the greater the energy consumption.

[0047] Optionally, the value of the standard deviation of the multiple power compliance durations after normalization (for example, max-min normalization) can be determined as the light output variability.

[0048] Optionally, the product of the delay fluctuation and the light output fluctuation can be determined as the energy loss degree.

[0049] Optionally, weights can be assigned to the delay fluctuation and the light output fluctuation respectively based on actual requirements, and then a weighted sum is performed to obtain the energy loss degree.

[0050] For example, the weights of the delay fluctuation and the light output fluctuation can be 0.5 respectively.

[0051] In the embodiments of the present application, the internal loss of the LED lamp to be detected is comprehensively evaluated by analyzing the delay fluctuation of the lighting duration and the fluctuation of the power compliance duration, which can more accurately and comprehensively capture the degradation trend and unstable state of the performance of the LED lamp to be detected, so that the evaluation of the energy loss degree is more comprehensive and sensitive.

[0052] In S104, the energy loss degree is corrected based on the electrical parameters of the DC bus in the plurality of power compliance durations to obtain a power regulation coefficient.

[0053] It should be understood that when the internal loss of the LED lamp to be detected is small, but the external factors (for example, power supply fluctuation) cause the duration for the LED lamp to be detected to reach the rated power to be long, the energy loss degree calculated above will also be high. At this time, the energy loss degree of the LED lamp to be detected determined above needs to be corrected downward.

[0054] Here is an example of a specific situation of an external factor: for example, if there is a situation that when the LED lamp is on, other high-power loads connected to the DC bus are also working, causing the DC bus voltage to instantaneously decrease. At this time, the driver of the LED lamp to be detected needs more time to charge the internal capacitor and establish a stable output power under the lower input voltage, so that the time for the LED lamp to be detected to reach the rated power becomes longer.

[0055] In the embodiments of the present application, whether there is external power supply fluctuation and the size of the power supply fluctuation can be determined through the electrical parameters of the DC bus.

[0056] It can be understood that the current and voltage follow the basic laws of electricity and the control logic of the system. According to Ohm's law, on the line resistance: voltage is equal to the product of current and resistance, so whether the change amount of the current is consistent with the change amount of the voltage in the power compliance duration of the LED lamp to be detected is analyzed. If the change is consistent, it means that there is external power supply fluctuation.

[0057] In one implementation of this application, the current sequence and voltage sequence of the DC bus can be determined within each power compliance period; based on the changes in the current sequence and voltage sequence within the multiple power compliance periods, the external interference correction factor of the LED lamp to be tested can be determined; based on the external interference correction factor, the energy loss degree can be corrected to obtain the power regulation coefficient.

[0058] Optionally, current and voltage sequences can be extracted from the electrical data of the DC bus according to the time sequence.

[0059] Optionally, the current sequence and voltage sequence can be sequences arranged in time sequence.

[0060] It should be understood that this external interference correction factor is used to characterize the degree to which the operating performance of the LED lamp under test is affected by DC bus interference.

[0061] In one alternative implementation, the voltage fluctuation intensity of the DC bus within each power-capped duration can be determined based on the voltage sequence within each power-capped duration; the power conservation deviation of the LED under test can be determined based on the voltage and current sequences within each power-capped duration; and the external interference correction factor of the LED under test can be determined based on the voltage fluctuation intensity and power conservation deviation within each power-capped duration.

[0062] Optionally, the intensity of the voltage fluctuation can be determined based on the average voltage of a voltage sequence and the difference between adjacent voltages in the voltage sequence.

[0063] Optionally, the voltage fluctuation intensity of the DC bus within a power compliance period satisfies the following formula:

[0064] in, Indicates the duration of power reaching the target. Voltage fluctuation intensity of the internal DC bus Indicates the LED light to be tested Rated voltage, Indicates the duration of power reaching the target. The average value of the voltage sequence within, Indicates the duration of power reaching the target. The voltage sequence within For the voltage difference between adjacent voltages, Indicates the duration of power reaching the target. The voltage sequence within For the voltage difference between adjacent voltages, Indicates the duration of power reaching the target. The number of voltages in the voltage sequence within. This represents the number of adjacent voltages in a voltage sequence. This indicates taking the absolute value. and This represents the weighting coefficient, the value of which can be set according to the actual application scenario. For example, in the absence of specific requirements, and Each can take the value 1.

[0065] Based on this formula, it should be understood that This indicates that it is an LED light to be tested. The average voltage provided by the DC bus relative to the LED under test over a period of time when the power is within the specified range. The degree of deviation from the required rated voltage; the larger the value, the greater the deviation and the greater the voltage fluctuation. This represents the average magnitude of the "acceleration" of voltage changes. The larger the value, the more unstable the voltage changes and the greater the intensity of voltage fluctuations.

[0066] It should be understood that this power conservation deviation is used to characterize the difference between the actual power variation of the LED lamp under test and the ideal constant power characteristics.

[0067] Optionally, multiple instantaneous power values ​​can be determined from the current and voltage at the same moment in the current and voltage sequences, and then the standard deviation of these multiple instantaneous power values ​​can be determined as the power conservation deviation.

[0068] It should be understood that the smaller the deviation of the power conservation, the stronger the ability of the LED lamp under test to maintain constant power characteristics when the voltage fluctuates, and the more likely its behavior is a normal response caused by external bus voltage fluctuations.

[0069] It should be understood that the external interference correction factor is used to characterize the historical probability that the performance changes of the LED lamp under test are affected by external power supply fluctuations. The larger the value, the greater the probability that the performance changes of the LED lamp under test are affected by external power supply fluctuations.

[0070] Optionally, the external interference correction factor for the LED lamp under test satisfies the following formula:

[0071] in, Indicates the LED light to be tested External interference correction factor Indicates the duration of power reaching the target. Voltage fluctuation intensity of the internal DC bus Indicates the duration of power reaching the target. Deviation of power conservation within the range, This indicates the number of times the power reached the target. This represents the preset minimum value, for example, 10. -6This is used to prevent the denominator from being 0.

[0072] Based on this formula, it should be understood that The larger the value, the more severe the fluctuation in DC bus voltage. At the same time, the smaller the deviation in power conservation, the more coordinated the fluctuation is with the change in bus current. That is, when the voltage changes, the current changes proportionally and synchronously, which conforms to the characteristics of a linear system characterized by Ohm's law. This indicates that the startup process encountered typical external grid interference caused by the connection or disconnection of a high-power linear load. Therefore, the larger the external interference correction factor, the more severe the external interference.

[0073] Optionally, the power regulation coefficient satisfies the following formula:

[0074] in, Indicates the LED light to be tested The power regulation coefficient, Indicates the LED light to be tested Energy loss rate Indicates the LED light to be tested External interference correction factor For the natural constant An exponential function with base 0. This represents a normalization function, such as max-min normalization, used to normalize the values ​​of all LEDs to be tested in the LED module. Normalize the values ​​to the range [0, 1].

[0075] It should be noted that when all the LEDs to be tested in the LED module... When the maximum and minimum values ​​are equal, the output value of the normalization function is defined as 0.

[0076] In this formula, This can be understood as an attenuation factor, which is a correction factor for external disturbances. A larger value indicates a higher likelihood of external interference, and the attenuation factor... The smaller, the better The greater the downward correction force, the higher the power regulation coefficient obtained. The smaller.

[0077] In this embodiment, the impact of external interference is quantified by analyzing the dynamic changes in the current and voltage of the DC bus during the power compliance period. Specifically, the external interference correction factor is calculated by analyzing the voltage fluctuation intensity and the consistency of voltage and current changes, thereby correcting the external influence and making the obtained power regulation coefficient more applicable to the internal loss of the LED lamp under test.

[0078] S105. Power regulation of the LED lamp under test is performed based on the power regulation coefficient.

[0079] In an alternative implementation, the current actual output power of the LED lamp to be detected can be acquired first; then the current actual output power is corrected based on the power regulation coefficient to obtain a target output power; and then the LED lamp to be detected is controlled to operate based on the target output power.

[0080] It should be understood that when the LED lamp to be detected is lighted, by adjusting the output power, the charging process of the internal energy storage element (such as a capacitor in the driving circuit) can be accelerated, thereby shortening the power compliance duration for reaching the rated working state.

[0081] Optionally, the target output power of the LED lamp to be detected satisfies the following formula:

[0082] wherein, the target output power of the LED lamp to be detected, the power regulation coefficient of the LED lamp to be detected, the actual output power of the LED lamp to be detected, the maximum allowable adjustment gain.

[0083] For example, the maximum allowable adjustment gain may be 0.2, i.e. the maximum upward adjustment is 20%.

[0084] It should be understood in connection with the formula that the target output power is adjusted upward on the basis of the actual output power to compensate for the light efficiency drop caused by the aging of the lamp, and the upward adjustment range is the power regulation coefficient.

[0085] Optionally, in order to ensure electrical safety, a rated power upper limit can be set, and after obtaining the target output power, the target output power is compared with the rated power upper limit. When the target output power is less than or equal to the rated power upper limit, the target output power can be taken as a control instruction and sent to the driver corresponding to the LED lamp to be detected, so that the driver controls the actual output power of the LED lamp to be detected to be stabilized around the target output power. When the target output power is greater than the rated power upper limit, the rated power upper limit is taken as a control instruction and sent to the driver corresponding to the LED lamp to be detected.

[0086] ​​​In one implementation of this application, after power regulation of the LED lamp under test based on the power regulation coefficient, the effect of the regulation can be checked. Specifically, the lighting duration and power compliance duration of the LED lamp under test in at least two subsequent lighting processes are obtained; based on the lighting duration and power compliance duration in the at least two lighting processes, it is determined whether the current regulation meets the standard; if the current regulation does not meet the standard, the power regulation coefficient is re-determined, and power regulation of the LED lamp under test is performed based on the re-determined power regulation coefficient.

[0087] It should be understood that checking the LED light's illumination process at least twice can verify the stability and effectiveness of the LED light under test, preventing accidental compliance from affecting the test results.

[0088] Optionally, a lighting duration threshold and a power compliance duration threshold can be set separately. If the lighting duration of two separate events is less than or equal to the lighting duration threshold and the power compliance duration of two separate events is less than or equal to the power compliance duration threshold, the current regulation is deemed to have met the standard.

[0089] Optionally, the difference between the two lighting durations and the difference between the two power compliance durations can be further determined. If the difference between the two lighting durations is less than the difference threshold and the difference between the two power compliance durations is less than the difference threshold, the current regulation is deemed to have met the standard.

[0090] Optionally, the lighting duration threshold, the power compliance duration threshold, and the difference threshold can be determined according to the requirements of the LED light. For example, the lighting duration threshold can be 1 second, the power compliance duration threshold can be 0.5 seconds, and the difference threshold can be 0.1 seconds.

[0091] Optionally, if the target is met, the LED under test can continue to be controlled based on the target output power.

[0092] In this embodiment, by introducing an external interference correction factor, the interference of DC bus voltage fluctuations on aging assessment can be accurately eliminated. This ensures that the power regulation coefficient only compensates for the actual degradation of internal components, avoiding erroneous overcompensation caused by external power grid fluctuations. Compared to traditional constant luminous flux control, this application effectively eliminates ineffective power output while ensuring lighting quality throughout the entire life cycle, achieving system-level energy efficiency optimization.

[0093] Combination Figure 1 ,like Figure 2 As shown, in one implementation of this application embodiment, before the above-described S101, the LED integrated module DC lighting control method further includes S201-S204.

[0094] S201, acquiring actual output powers of all LED lamps in the LED integrated module at a plurality of collection time instants in a historical time period.

[0095] Optionally, the historical time period can be 24 hours before the current time instant.

[0096] Optionally, the actual current and the actual voltage of each LED lamp in the historical time period can be collected based on a preset frequency, and then the actual output power of each collection time instant can be determined based on the actual current and the actual voltage of each collection time instant.

[0097] S202, determining a difference absolute value between the actual output power and the rated power of each LED lamp at each collection time instant.

[0098] Optionally, the rated power of each LED lamp can be acquired from model information of each LED lamp.

[0099] It should be understood that the difference absolute value represents a degree of deviation of an LED lamp from an ideal working state at a collection time instant.

[0100] S203, determining an average rated difference of each LED lamp based on a mean value of the difference absolute values between the actual output power and the rated power of each LED lamp at the plurality of collection time instants.

[0101] It should be understood that the average rated difference of an LED lamp represents an average level of overall deviation of the actual output power of the LED lamp from the rated power in the historical time period. The greater the average rated difference, the greater the power fluctuation of the lamp, and the higher the risk of external power supply abnormality (such as poor line contact) or internal failure (such as driver element recession) of the lamp; the smaller the average rated difference, the higher the consistency between the actual voltage provided to the LED lamp and the rated voltage value designed for the LED lamp, and the higher the efficiency and safety of the lamp.

[0102] Optionally, the average rated difference of an LED lamp satisfies the following formula:

[0103] wherein, represents the average rated difference of the i-th LED lamp, represents the actual output power of the i-th LED lamp at the collection time instant t, represents the rated power of the i-th LED lamp, represents the number of collection time instants. According to the formula, it should be understood that, represents the average rated difference of the i-th LED lamp, represents the actual output power of the i-th LED lamp at the collection time instant t,

[0104] ​​​the absolute value of the difference between the actual output power and the rated power of the i-th LED lamp at the collection moment, the absolute value of the difference between the actual output power and the rated power of the i-th LED lamp at the collection moment, the absolute value of the difference between the actual output power and the rated power of the i-th LED lamp at the collection moment, the absolute value of the difference between the actual output power and the rated power of the i-th LED lamp at the collection moment, the absolute value of the difference between the actual output power and the rated power of the i-th LED lamp at the collection moment.

[0105] S204, determining the LED lamp to be detected from the LED integrated module based on the average rated difference of each LED lamp.

[0106] In an alternative implementation, the average rated differences of all LED lamps can be arranged in descending order to obtain a difference sequence; the absolute value of the difference between adjacent average rated differences in the difference sequence is determined; the average of the target adjacent average rated differences is determined as the difference threshold; and the LED lamp with the average rated difference greater than the difference threshold is determined as the LED lamp to be detected.

[0107] wherein the target adjacent average rated difference is the adjacent average rated difference with the maximum absolute value of the difference.

[0108] It should be understood that the adjacent average rated difference with the maximum absolute value of the difference is the demarcation point of the difference mutation in the difference sequence, and the difference sequence can be divided into two parts based on the demarcation point, i.e., the left side is the higher average rated difference and the right side is the smaller average rated difference.

[0109] Therefore, the average of the two adjacent average rated differences at the demarcation point is determined as the difference threshold, and the LED lamp with the average rated difference greater than the difference threshold (i.e., the sequence on the left side of the demarcation point) is determined as the LED lamp to be detected, which can mark the LED lamp with relatively abnormal external power supply or high internal fault risk.

[0110] For example, assuming that the LED integrated module has 10 LED lamps, the average rated differences are 0.8, 0.75, 0.7, 0.2, 0.18, 0.15, 0.12, 0.1, 0.08, and 0.05 after sorting, the target adjacent average rated differences are 0.7 and 0.2, and the difference threshold is 0.45. The LED lamp with the average rated difference greater than 0.45 (i.e., the first three) is determined as the LED lamp to be detected.

[0111] The embodiments of the present application also provide an LED integrated module direct current lighting control system, which can implement any one of the above LED integrated module direct current lighting control methods. As shown in FIG. 3, the LED integrated module direct current lighting control system 30 includes a data collection unit 301, a data processing unit 302, and a power execution unit 303. Figure 3

[0112] ​The data acquisition unit 301 is configured to acquire historical operation data of the LED lamp to be detected and electrical data of the DC bus in the LED integrated module.

[0113] The data processing unit 302 is configured to determine a plurality of lighting time lengths and power up-to-standard time lengths of the LED lamp to be detected based on the historical operation data of the LED lamp to be detected.

[0114] One of the lighting time lengths is a time length from sensing a person to lighting of the LED lamp to be detected in one lighting process, and one of the power up-to-standard time lengths is a time length from lighting to reaching a rated power of the LED lamp to be detected in one lighting process.

[0115] The data processing unit 302 is further configured to determine an energy loss degree of the LED lamp to be detected based on the plurality of lighting time lengths and the plurality of power up-to-standard time lengths.

[0116] The data processing unit 302 is further configured to correct the energy loss degree based on electrical parameters of the DC bus in the plurality of power up-to-standard time lengths to obtain a power regulation coefficient.

[0117] The power execution unit 303 is configured to regulate power of the LED lamp to be detected based on the power regulation coefficient.

[0118] It should be noted that the above-mentioned sequence of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multi-task processing and parallel processing are also possible or can be advantageous.

[0119] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each of the embodiments mainly describes the difference from other embodiments.

Claims

1. A DC lighting control method for an LED integrated module, characterized in that, include: Collect historical operating data of the LED lamps under test and electrical data of the DC bus in the LED integrated module; Based on the historical operating data of the LED lamp under test, multiple lighting durations and power compliance durations of the LED lamp under test are determined. A lighting duration is the time from when the LED lamp under test senses a person to when it lights up during the lighting process. A power compliance duration is the time from when the LED lamp under test lights up to when it reaches the rated power during the lighting process. Based on the multiple lighting durations and multiple power compliance durations, the energy loss of the LED lamp under test is determined; Based on the electrical parameters of the DC bus during the multiple power compliance periods, the energy loss is corrected to obtain the power regulation coefficient. The power of the LED lamp under test is regulated based on the power regulation coefficient.

2. The LED integrated module DC lighting control method according to claim 1, characterized in that, The historical operating data includes the sensing time, lighting time, and rated power time of the LED under test during multiple lighting processes. The determination of multiple lighting durations and power compliance durations of the LED under test based on the historical operating data includes: The duration between the sensing moment and the lighting moment during each light-on process is defined as the lighting duration during each light-on process, where the sensing moment is the moment when the LED light to be tested senses a person; The duration between the lighting moment and the rated power moment during the lighting process of each lamp is defined as the power attainment time during the lighting process of each lamp, and the rated power moment is the moment when the LED lamp under test first reaches the rated power.

3. The LED integrated module DC lighting control method according to claim 1, characterized in that, The determination of the energy loss of the LED lamp under test based on the multiple lighting durations and the multiple power compliance durations includes: The delay fluctuation of the LED lamp under test is determined based on the average value of the multiple lighting durations and the absolute value of the difference in lighting duration between two adjacent lamps. The light output fluctuation of the LED lamp under test is determined based on the standard deviation of the multiple power compliance times. The energy loss rate is determined based on the delay fluctuation and the light output fluctuation of the LED lamp under test.

4. The LED integrated module DC lighting control method according to claim 1, characterized in that, The electrical parameters include current and voltage. The energy loss is corrected based on the electrical parameters of the DC bus within the multiple power compliance periods to obtain the power regulation coefficient, including: Determine the current sequence and voltage sequence of the DC bus for each power compliance period; Based on the changes in current and voltage sequences within the multiple power compliance periods, the external interference correction factor for the LED lamp under test is determined. The power regulation coefficient is obtained by correcting the energy loss degree based on the external interference correction factor.

5. The LED integrated module DC lighting control method according to claim 4, characterized in that, The determination of the external interference correction factor for the LED lamp under test based on the changes in the current sequence and voltage sequence within the multiple power compliance periods includes: Based on the voltage sequence within each power compliance period, determine the voltage fluctuation intensity of the DC bus within each power compliance period; Based on the voltage and current sequences within each power compliance period, the power conservation deviation of the LED lamp under test is determined. Based on the voltage fluctuation intensity and power conservation deviation within each power compliance period, the external interference correction factor for the LED lamp under test is determined.

6. The LED integrated module DC lighting control method according to claim 1, characterized in that, The power regulation of the LED lamp under test based on the power regulation coefficient includes: Obtain the current actual output power of the LED light to be tested; The target output power is obtained by correcting the current actual output power based on the power regulation coefficient. The operation of the LED lamp under test is controlled based on the target output power.

7. The LED integrated module DC lighting control method according to claim 1, characterized in that, The method further includes: Obtain the actual output power of all LEDs in the LED integrated module at multiple sampling times within a historical time period; Determine the absolute value of the difference between the actual output power and the rated power of each LED at each data acquisition time; The average rated difference of each LED is determined based on the average absolute value of the difference between the actual output power and the rated power of each LED at multiple sampling times. The LED to be tested is determined from the LED integrated module based on the average rated difference of each LED.

8. The LED integrated module DC lighting control method according to claim 7, characterized in that, The step of determining the LED to be tested from the LED integrated module based on the average rated difference of each LED includes: Arrange the average rated differences of all LED lights in descending order to obtain the difference sequence; Determine the absolute value of the difference between adjacent average nominal differences in the difference sequence; The mean of the average nominal difference between adjacent targets is determined as the difference threshold, wherein the average nominal difference between adjacent targets is the average nominal difference between adjacent targets with the largest absolute value of the difference. LEDs with an average rated difference greater than the difference threshold are identified as LEDs to be tested.

9. The LED integrated module DC lighting control method according to claim 1, characterized in that, After adjusting the power of the LED lamp under test based on the power regulation coefficient, the method further includes: The duration of illumination and the duration of power compliance of the LED light under test are obtained in at least two subsequent lighting processes. Based on the lighting duration and power compliance duration during the at least two lighting processes, determine whether the current adjustment meets the standard. If the current adjustment fails to meet the requirements, the power adjustment coefficient is redefined, and the power of the LED lamp under test is adjusted based on the redefined power adjustment coefficient.

10. A DC lighting control system for an integrated LED module, characterized in that, The system includes: a data acquisition unit, a data processing unit, and a power execution unit; The data acquisition unit is used to collect historical operating data of the LED lamps under test in the LED integrated module and electrical data of the DC bus; The data processing unit is used to determine multiple lighting durations and power compliance durations of the LED lamp under test based on the historical operating data of the LED lamp under test. A lighting duration is the time from when the LED lamp under test is sensed by a person to when it is lit during the lighting process of a lamp. A power compliance duration is the time from when the LED lamp under test is lit to when it reaches the rated power during the lighting process of a lamp. The data processing unit is also used to determine the energy loss of the LED lamp under test based on the multiple lighting durations and multiple power compliance durations; The data processing unit is also used to correct the energy loss degree based on the electrical parameters of the DC bus within the multiple power compliance periods to obtain the power regulation coefficient; A power execution unit is used to regulate the power of the LED lamp under test based on the power regulation coefficient.

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