Distributed LED lamp control system based on light modulator control

Abstract

The invention belongs to the technical field of light modulator control, and particularly relates to a distributed LED lamp control system based on light modulator control, which analyzes the physical position of each lamp in a place through a power line carrier phase difference, synchronously fuses the illuminance, target density and gas concentration data of the corresponding position, generates a coordinate-bound logic scene label, and displays the coordinate-bound logic scene label. And dynamically generating a dimming instruction of each lamp in a place based on label multi-dimensional feature fusion, performing dimming instruction set classification according to a lamp driving protocol type, realizing instruction issuing in combination with communication window segmentation control and a dimming parameter sorting strategy, performing brightness adjustment after analysis by a lamp terminal, and in the process of controlling the lamp by a dimmer, adjusting the brightness of the lamp by the dimmer. Driving current fluctuation is monitored in real time, local compensation is executed, a constant-current standby mode is switched when abnormity is detected, cooperative control, system linkage brightness adjustment and emergency early warning of a single light modulator on multiple types of lamps in a large area are achieved, and the safety response capacity of the system to a complex environment is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of dimmer control, and specifically relates to a distributed LED lighting control system based on dimmer control. Background Art

[0002] As the core component for controlling the brightness of lamps, the dimmer realizes the dynamic control of the lamp brightness by precisely adjusting the voltage or current. The traditional fixed brightness mode is difficult to meet the energy-saving and personalized requirements, while the dimmer can adjust the illuminance in real time according to the ambient light intensity, personnel activities, etc., creating diverse scenarios while improving energy efficiency. With the development of intelligent and distributed control technologies, the dimmer has evolved from a single manual device to a network node, working in coordination with sensors and lamps to build a flexible and efficient lighting network.

[0003] Existing dimmer control lamp technologies have involved various solutions and are widely used in the lighting field. For example, a dimmer and dimming and color mixing control method based on power line carrier, with the dimmer disclosed in Chinese Patent Publication No. CN117896883B, which consists of a phase-cut carrier controller, a main power supply, a detection circuit, a drive circuit, and an MOS transistor. By retaining each half-wave waveform of the power frequency alternating current and avoiding the chopping of the whole wave, the energy storage capacitor of the main power supply can be reduced while still maintaining the lamp output, realizing the miniaturized design of dimming and color mixing drive.

[0004] Another Chinese Patent Publication No. CN112437516A discloses a digital timing dimmer control circuit, which includes a setting module, a control module, a dimming control module, and a dimming module. The setting module obtains the timing time and light intensity signals set by the user, the control module generates a control signal, the dimming control module converts it into a dimming signal, and finally the dimming module realizes the adjustment of the light intensity. Its advantage is that it can control the switch-on and -off of the lamp and adjust the brightness according to the user's needs.

[0005] Although the above-mentioned solutions related to dimmer control of lamps are proposed, they still have the common limitations of the existing technologies, specifically manifested as follows: 1. The existing technologies adopt the "one lamp, one dimmer" architecture. When deployed in large spaces, the number of dimmers increases linearly with the number of lamps, resulting in complex wiring, high equipment costs, and increased system management difficulty due to decentralized control, making it difficult to achieve global collaborative optimization.

[0006] 2. Existing dimmers only support a single drive protocol and are difficult to be compatible with multiple types of light sources such as thyristor LED lamps and 0-10V controlled lamps mixed in a venue. The system is forced to be divided into multiple independent control islands, and it is impossible to establish a unified control strategy.

[0007] 3. Existing technologies mostly focus on data such as brightness, color temperature, and target density, lacking the integrated monitoring of gas concentration parameters in the venue. They cannot achieve emergency responses such as gas anomaly warnings through the linkage of dimmers and lamps, reducing the comprehensive safety performance of the system. Summary of the Invention

[0008] To overcome the drawbacks in the background technology, the embodiment of the present invention provides a distributed LED lamp control system based on dimmer control, which can effectively solve the problems involved in the above background technology.

[0009] The object of the present invention can be achieved through the following technical solutions: A distributed LED lamp control system based on dimmer control includes: an environmental perception module, a dimming decision module, an instruction issuing module, and an execution control module.

[0010] The environmental perception module is connected to the dimming decision module, the dimming decision module is connected to the instruction issuing module, and the instruction issuing module is connected to the execution control module.

[0011] The environmental perception module analyzes the physical positions of each lamp in the venue through power line carrier phase difference, synchronously integrates the illuminance, target density, and gas concentration data at the corresponding positions, and generates a logical scene label bound to coordinates.

[0012] The dimming decision module generates dimming instructions for each lamp in the venue through dynamic scene adaptation decision based on the multi-dimensional feature fusion of the logical scene label.

[0013] The instruction issuing module classifies the dimming instruction set according to the type of lamp drive protocol, and realizes the instruction issuing by combining the communication window segment control and the dimming parameter sorting strategy.

[0014] The execution control module: The lamp terminal analyzes the dimming instruction to execute the brightness adjustment, monitors the fluctuation of the lamp drive current in real time to carry out local compensation, and switches to the constant current standby mode when an anomaly is detected.

[0015] Compared with the existing technology, the embodiment of the present invention has at least the following advantages or beneficial effects: (1) The present invention realizes the automatic calibration of the physical coordinates of the lamps through the power line carrier phase difference, constructs the mapping relationship between the lamp logical scene and the real space, supports a single dimmer to perceive and control the lighting environment of the lamp cluster, reduces the number of dimmer deployments in large-area venues, and reduces the wiring complexity, thus significantly improving the global collaborative control efficiency.

[0016] (2) Based on multi-dimensional features such as illuminance and target density of the lighting logic scene, the present invention dynamically generates dimming instructions. Combining the instruction classification and distribution strategy, it can be compatible with the drive protocols of lamps of different brands and models, breaking the limitation of traditional dimmers on a single lamp type, achieving unified control of multiple types of lamps, improving system flexibility, and reducing procurement and maintenance costs caused by device heterogeneity.

[0017] (3) The present invention integrates illuminance, target density, and gas concentration data, and through the linkage of the dimmer and the lamp, it performs brightness adjustment and emergency warning. For example, when detecting excessive gas, the lamp fixes its brightness and displays a preset warning color temperature, enhancing the system's safety response ability to complex environments.

[0018] (4) During the process of the dimmer controlling the lamp, the present invention monitors the driving current fluctuation in real time and performs local compensation. If an abnormality is detected, it automatically switches to the constant current standby mode, effectively avoiding brightness fluctuations or lamp losses caused by unstable current, and ensuring the smoothness and accuracy of brightness adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the following drawings.

[0020] Figure 1 It is a schematic diagram of the module connection of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the power line topology map constructed during the process of the present invention using triangular positioning to solve the physical position coordinates of each lamp in the venue.

[0022] Figure 3 It is a schematic diagram of the specific instruction distribution logic of the instruction distribution module of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] 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 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 fall within the protection scope of the present invention.

[0024] Referring to Figure 1 As shown, the present invention provides a distributed LED lamp control system based on dimmer control, including: an environmental perception module, a dimming decision module, an instruction distribution module, and an execution control module.

[0025] The environment perception module is connected to the dimming decision-making module, the dimming decision-making module is connected to the instruction issuing module, and the instruction issuing module is connected to the execution control module.

[0026] The environment perception module analyzes the physical positions of the lamps in the venue through power line carrier phase difference, synchronously fuses the illuminance, target density and gas concentration data at the corresponding positions, and generates a logical scene label with coordinate binding.

[0027] In a preferred embodiment of the present invention, the physical positions of the lamps in the venue are obtained as follows: a high-frequency carrier signal is injected into the output circuits of the lamps in the venue through the carrier signal generator built in the dimmer, the phase offset of the echo signals of the lamps in the venue is measured, and the physical position coordinates of the lamps in the venue are calculated by using triangulation positioning in combination with the preset multi-loop topology parameters of the dimmer.

[0028] It should be noted that the frequency of the above high-frequency carrier signal needs to match the impedance characteristics of LED lamps of different drive protocol types. For example, to be compatible with the impedance characteristics of thyristor dimming circuits and 0-10V dimming circuits, the frequency range of the high-frequency carrier signal can be set to 50kHz-150kHz.

[0029] The above preset multi-loop topology parameters of the dimmer include the line direction of the high-frequency carrier signal injected by the dimmer, the physical position coordinates of each branch point of the power line, the characteristic frequency band of the corresponding impedance mutation point, and the physical distance between the corresponding dimmers.

[0030] It should be added that the premise of the above step of calculating the physical position coordinates of the lamps in the venue by using triangulation positioning is as follows: this triangulation positioning method is based on the power line carrier positioning characteristics under a single dimmer architecture, and its core lies in virtualizing the power line branch points into positioning reference points through the preset multi-loop topology parameters of the dimmer. Specifically, the propagation path of the high-frequency carrier signal follows the "dimmer - power line - output circuits of each lamp" transmission model, and the received echo signals of each lamp are all composite echo signals, including power line branch point signals (including the position and delay information of the power line branch points) and lamp signals (including the phase offset characteristics and delay information of the lamps), where the power line branch points are junction boxes or circuit breakers.

[0031] The specific calculation steps are as follows: Step S101, use the carrier signal generator built in the dimmer to inject a carrier signal into the power line, receive the reflection signals generated by each impedance mutation point in the power line, record the propagation delay and arrival direction angle of the signals reaching the dimmer, and calculate the electrical distance between each impedance mutation point and the dimmer based on the time domain reflectometer ranging formula.

[0032] Step S102: Compare the electrical distances between each impedance mutation point and the dimmer with the physical distances of each branch point in the preset multi-loop topology parameters of the dimmer relative to the dimmer, establish the mapping relationship between the impedance mutation point and the branch point, and exclude the reverse path interference through the signal arrival direction angle, so as to generate a power line topology diagram with the dimmer as the starting node, including the main path (power line) and branch paths (output loops of each lamp). For details, please refer to Figure 2 .

[0033] Step S103: Perform fast Fourier transform on the echo signals of each lamp, separate the power line branch point signals and lamp signals contained in the echo signals, extract the delay information stored in the lamp signals (specifically, the transmission delay of the lamp signals arriving at the dimmer), and combine the signal angular frequency derived from the high-frequency carrier signal frequency using the angular frequency formula. Define the phase offset of each lamp echo signal as the product of the transmission delay of its lamp signal arriving at the dimmer and the signal angular frequency, and further calculate the physical distance between each lamp and the dimmer in the venue based on the wavelength conversion.

[0034] Step S104: Based on the power line branch point signals (the number of signals is not limited) separated from the lamp echo signals, extract the independent transmission paths for the dimmer to inject high-frequency carrier signals into each lamp in the power line topology diagram, determine the position coordinates P1 of the nearest branch point of the lamp and the physical distance L1 between this branch point and the dimmer. Combining the physical position coordinates P0 of the dimmer and the physical distance D between the lamp and the dimmer (where D > L1), use the formula to calculate the physical position coordinates of the lamp, where is the last coordinate of the independent transmission path for the dimmer to inject high-frequency carrier signals into the lamp.

[0035] It should also be added that the specific physical meaning of the above formula for calculating the physical position coordinates of the lamp is as follows: represents the vector from the branch point P1 to the end of the branch, defining the extension direction of the branch, represents scaling the total remaining distance according to the ratio of the branch direction, so as to obtain the actual displacement vector. Finally, the physical position coordinates P2 of the lamp are obtained by superimposing the displacement vector on the branch point P1.

[0036] Assume P1(0, 0), (6, 8), L1 = 5, D = 10. The vector from the branch point P1 to the end of the branch is determined to be (6, 8), and the scaling ratio is 0.5. Then the physical position coordinates of the lamp are calculated to be (3, 4).

[0037] In a preferred embodiment of the present invention, the generation process of the logical scenario tags is as follows: The sensors deployed inside the venue are used to collect real-time data on instantaneous illuminance, target density, and gas concentration. The minimum monitoring unit is delimited according to the detection radius of the gas sensors in the sensor cluster. The venue space grid is divided based on a preset volume, and the divided grids are marked as sensing and monitoring grids.

[0038] It should be noted that the above-mentioned sensor cluster includes a photoresistor sensor, a target monitoring sensor, and a gas sensor. Among them, the target monitoring sensor varies according to the venue. For example, when the target is a crowd, an infrared sensor array can be used.

[0039] The gas concentration data includes, but is not limited to, hydrogen sulfide, ammonia, and carbon dioxide concentrations.

[0040] Extract the monitoring values of various gas concentrations collected in real time by each sensing and monitoring grid in the venue, compare them with the preset concentration standards of the corresponding gas types, quantify the exceeding standard ratios of various gas concentration monitors, and determine the gas safety levels of each sensing and monitoring grid in the venue based on the preset gas safety level determination rules.

[0041] It should be added that the specific quantification process of the above-mentioned exceeding standard ratios of various gas concentration monitors is as follows: The preset concentration standard includes a preset concentration compliance threshold and its compliance determination direction. If the comparison direction of a certain gas concentration monitoring value with its preset concentration compliance threshold is the same as the compliance determination direction, then the exceeding standard ratio of this gas concentration monitor is quantified as 0. Otherwise, calculate the absolute difference between the gas concentration monitoring value and its preset concentration compliance threshold, and use the calculation result of the ratio of the absolute difference to its preset concentration compliance threshold as the exceeding standard ratio.

[0042] The above-mentioned preset gas safety level determination rules specifically include: specifying the range intervals of the exceeding standard ratios of various gas concentration monitors corresponding to each gas safety level, determining the gas safety levels corresponding to the exceeding standard of various gas concentration monitors based on the exceeding standard ratios of various gas concentration monitors quantified by the sensing and monitoring grids in the venue, and selecting the lowest gas safety level as the gas safety level of the sensing and monitoring grids in the venue. The specification of the range intervals of the exceeding standard ratios of various gas concentration monitors corresponding to each gas safety level can refer to industry standard guidelines, such as GB / T50493-2019 and GBZ2.1, to clarify the safety concentration limits and alarm setting rules of various gases.

[0043] Integrate the target density value, instantaneous illuminance, and gas safety level of the sensing and monitoring grid to generate the logical scenario tags of each sensing and monitoring grid in the venue.

[0044] In a preferred embodiment of the present invention, the generation process of the logical scenario tags further includes: planning the polyhedron boundary of the lighting responsibility area according to the physical position coordinates of the lamps.

[0045] It should be noted that the lighting responsibility area planning is determined by the lamp beam angle parameter and the installation height.

[0046] When there is a spatial intersection between the lighting responsibility area of the lamp and the sensing monitoring grid, and the volume ratio of the intersection space to the sensing monitoring grid reaches the preset volume ratio, the logical scene label of the sensing monitoring grid is bound to the physical position coordinates of the lamp.

[0047] If a lamp is bound with multiple logical scene labels, label integration processing is performed according to the rule of replacing with the lowest gas safety level and taking the average values of the target density value and the instantaneous illuminance respectively, so as to obtain the logical scene labels bound to the coordinates of each lamp in the venue.

[0048] In the embodiment of the present invention, the automatic calibration of the physical coordinates of the lamp is realized through the power line carrier phase difference, the mapping relationship between the logical scene of the lamp and the real space is constructed, the lighting environment of the lamp cluster can be sensed and controlled by a single dimmer, the number of dimmer deployments in a large-area venue is reduced, and the wiring complexity is reduced, thereby significantly improving the global collaborative control efficiency.

[0049] The dimming decision module generates dimming instructions for each lamp in the venue based on the multi-dimensional feature fusion of the logical scene label through dynamic scene adaptation decision-making.

[0050] In a preferred embodiment of the present invention, the generation of the dimming instructions for each lamp in the venue is as follows: If it is detected that the gas safety level in the logical scene label bound to the lamp reaches or is lower than the preset warning level, the emergency dimming mode of the lamp is triggered and a locked dimming instruction including fixed color temperature and brightness parameters is generated.

[0051] If it is detected that the gas safety level is higher than the preset warning level, the following steps are executed: (1) Based on the physical position of the lamp, match the spatial function attributes of the venue, and call the preset target density-illuminance mapping table associated with the spatial function attributes of the venue. The mapping table includes the non-linear mapping relationship between the target density interval and the reasonable illuminance interval.

[0052] (2) Obtain the reasonable illuminance interval associated with the target density value in the logical scene label bound to the lamp.

[0053] (3) When the instantaneous illuminance exceeds the reasonable illuminance interval, execute: i. Calculate the absolute value of the deviation and the first-order derivative between the instantaneous illuminance and the reasonable illuminance interval. ii. Input the absolute value of the deviation and the first-order derivative into the preset fuzzy rule base, output the fuzzy set of the dimming amplitude and determine the dimming amplitude. iii. Perform gradient difference constraint verification on the dimming amplitude to generate an effective dimming instruction.

[0054] It should be noted that the specific calculation process of the absolute value of the deviation between the instantaneous illuminance and the reasonable illuminance range and its first derivative is as follows: If the instantaneous illuminance is greater than the upper limit value of the reasonable illuminance range, the absolute value of the deviation is the difference between the instantaneous illuminance and the upper limit value of the range; if the instantaneous illuminance is less than the lower limit value of the reasonable illuminance range, the absolute value of the deviation is the absolute difference between the instantaneous illuminance and the lower limit value of the range. The first derivative of the instantaneous illuminance and the reasonable illuminance range is used to quantify the light change rate, specifically the difference in instantaneous illuminance between the current time point and the previous time point, further the ratio result with the sampling interval between the two time points.

[0055] The above-mentioned preset fuzzy rule base is a series of "condition-action" rules predefined based on expert experience or historical data. Its core function is to map the fuzzy state combination of the absolute value of the deviation of the instantaneous illuminance (the difference between the current light and the target range) and its first derivative (the light change rate) to the action trend of the dimming amplitude. Each rule contains the following elements:

[0056] State conditions: The fuzzy state combination of the absolute value of the deviation (such as "small, medium, large") and the first derivative (such as "negative fast, negative slow, zero, positive slow, positive fast"), and the membership degree is calculated by a triangular or trapezoidal membership function (for example, when the absolute value of the deviation is "large", the membership degree is 0.8, and when the first derivative is "positive fast", the membership degree is 0.6).

[0057] Action trend: The fuzzy instruction corresponding to the dimming amplitude (such as "substantially reduce", "slightly increase").

[0058] Rule confidence: Take the minimum value of the membership degrees of the input variables (for example, if the deviation membership degree is 0.8 and the derivative membership degree is 0.6, then the rule confidence is 0.6).

[0059] The specific output process of the above dimming amplitude fuzzy set is as follows: The absolute value of the deviation and the first derivative are fuzzified, mapped to fuzzy linguistic variables through membership functions, and given membership degree values. Retrieve each matching rule triggered by the fuzzy state combination of the input variables from the preset fuzzy rule base, truncate (crop according to confidence) and aggregate the output fuzzy sets of each matching rule, usually using the maximum value or summation method. For example, if the membership degree of "medium amplitude reduction" in Rule 1 is truncated to 0.7 and the "large amplitude reduction" in Rule 2 is truncated to 0.6, a continuous membership degree distribution may be formed in the dimming amplitude range [-20%, -10%] after aggregation. The aggregated fuzzy set is converted into an accurate dimming amplitude value through defuzzification. Common methods include the centroid method (calculating the centroid position of the membership degree distribution) or the maximum membership degree method (taking the value corresponding to the highest point of the membership degree). For example, if the centroid of the aggregated fuzzy set corresponds to a dimming amplitude of -15%, the system initially determines that the brightness needs to be reduced by 15%. In this process, the numerical size of the deviation determines the main direction of dimming (such as reducing brightness when exceeding the upper limit), while the first derivative affects the urgency of adjustment (such as a larger amplitude compensation is required when the light intensity continues to rise). The two work together to make the output not only correct the current deviation but also predict the trend to avoid lag.

[0060] (4)When the instantaneous illuminance is within the reasonable illuminance range, an empty-value dimming command is automatically generated.

[0061] In a preferred embodiment of the present invention, the dimming command includes a lamp type identification code, a dimming amplitude, a dimming direction code, and a color temperature parameter. Among them, the color temperature parameter of the lamp is locked at a preset warning color temperature in the emergency dimming mode, and the default color temperature parameter configuration of the lamp is retained in the non-emergency dimming mode.

[0062] The embodiment of the present invention integrates illuminance, target density, and gas concentration data, and through the dimmer, the lamps are linked to perform brightness adjustment and emergency warning. For example, when the detected gas exceeds the standard, the light is fixed at a certain brightness and the preset warning color temperature is displayed, improving the safety response ability of the system to complex environments.

[0063] The command issuing module classifies the dimming command set according to the lamp driving protocol type, and realizes command issuing by combining communication window segmented control and dimming parameter sorting strategy.

[0064] Refer to Figure 3 As shown in the figure, in a preferred embodiment of the present invention, the command issuing process is as follows: Based on the driving protocol type mapped by the lamp type identification code, the dimming commands of each lamp in the venue are classified into a parallel issuing command set and a serial issuing command set.

[0065] The preset communication time window is divided into three equal-length sub-windows: the first, the second, and the third. In the first sub-window, each dimming command including the preset warning color temperature is issued.

[0066] In the second sub-window, the parallel issued instruction set is synchronously sent through an independent physical channel, and the serial issued instruction set is sequentially issued through a shared bus after being sorted in descending order according to the weighted result of the absolute value of the dimming amplitude and the dimming direction.

[0067] It should be noted that the specific process of obtaining the weighted result of the absolute value of the dimming amplitude and the dimming direction is as follows: if the dimming direction is upward, the dimming direction coefficient is defined as 1; if the dimming direction is downward, the dimming direction coefficient is defined as -1. The product of the absolute value of the dimming amplitude and the dimming direction coefficient defined by the dimming direction is respectively multiplied by their corresponding preset weights and then accumulated. The accumulated result is the weighted result, which is used to convert the physical meaning (intensity and direction) of the dimming amplitude into a quantifiable priority index. Among them, the preset weights corresponding to the absolute value of the dimming amplitude and the dimming direction coefficient defined by the dimming direction should follow that the preset weight of the absolute value of the dimming amplitude is greater than the preset weight of the dimming direction coefficient defined by the dimming direction, and the sum of the two preset weights is 1, such as 0.7 and 0.3.

[0068] It should also be noted that if the parallel issued instruction set can correspond to the dimming instructions of all thyristor LED lamps deployed inside the venue, the serial issued instruction set can correspond to the dimming instructions of all 0-10V control lamps deployed inside the venue, and the sequential issuance of the serial issued instruction set through the shared bus is obtained based on the 485 communication protocol conversion.

[0069] In the third sub-window, uncompleted instructions are detected and a retransmission mechanism is triggered.

[0070] In a preferred embodiment of the present invention, the duration of each sub-window adopts a dynamic adjustment method, including: if the instructions in the first sub-window are completed in advance, the remaining duration is merged into the second sub-window.

[0071] If the second sub-window times out without completion, it occupies the duration of the third sub-window to cover the remaining instructions.

[0072] The embodiments of the present invention dynamically generate dimming instructions based on multi-dimensional features such as the illuminance and target density of the lighting logic scene of the lamps. Combining the instruction classification and issuance strategy, it can be compatible with the drive protocols of lamps of different brands and models, break the limitation of traditional dimmers on a single lamp type, and realize the unified control of multi-type lamps, which not only improves the flexibility of the system but also reduces the procurement and maintenance costs caused by equipment heterogeneity.

[0073] For the execution control module, the lamp terminal parses the dimming instructions to execute brightness adjustment, monitors the fluctuation of the lamp drive current in real time to carry out local compensation, and switches to the constant current standby mode when an abnormality is detected.

[0074] In a preferred embodiment of the present invention, the implementation of the local compensation is as follows: The ripple amplitude of the lamp drive current is monitored in real time, and the captured peak value of the lamp drive current fluctuation is compared with a preset current allowable fluctuation threshold. When the peak value of the lamp drive current fluctuation exceeds the threshold and the exceeding ratio is less than the preset ratio limit, the change trend of the peak value of the lamp drive current fluctuation is identified to determine the lamp brightness compensation direction.

[0075] It should be added that the linear slope of the peak value of the lamp drive current fluctuation within the least squares fitting window is obtained. If the value of the linear slope is greater than 0, it indicates that the peak value of the lamp drive current fluctuation shows an upward trend, and the lamp brightness needs to be reduced in the reverse direction, that is, the lamp brightness compensation direction is negative compensation. If the value of the linear slope is less than 0, it indicates that the peak value of the lamp drive current fluctuation shows a downward trend, and the lamp brightness compensation direction is positive compensation.

[0076] The duration and amplitude of the current fluctuation of the lamp are synchronously collected to generate a brightness compensation amount, and the brightness compensation amount combined with the brightness compensation direction is superimposed on the original dimming instruction. When it is detected that the peak value of the lamp drive current fluctuation falls back within the threshold range, the lamp brightness is controlled to gradually return to the original instruction target value.

[0077] In a preferred embodiment of the present invention, the switching of the constant current standby mode is as follows: When it is detected that the peak value of the lamp drive current fluctuation continuously exceeds the threshold for a first preset duration, or the exceeding ratio is greater than or equal to the preset ratio limit, it is determined that the lamp drive current is in an abnormal state.

[0078] The main drive circuit of the lamp is cut off, and the constant current standby mode is switched to maintain the basic lighting of the lamp. The state of the main drive module is cyclically detected in the constant current standby mode. If the abnormal state still persists after a second preset duration, power-off protection is triggered and a fault message is reported.

[0079] In the process of the dimmer controlling the lamp, the present invention embodiment monitors the drive current fluctuation in real time and performs local compensation. If an abnormality is detected, the constant current standby mode is automatically switched, effectively avoiding brightness fluctuations or lamp losses caused by unstable current, and ensuring the smoothness and accuracy of brightness adjustment.

[0080] Declaration: The core of the invention system lies in achieving unified control of LED lamps with different drive protocol types in a venue through a single dimmer. For the convenience of subsequent analysis, the specific implementation methods mostly take the thyristor LED lamps and 0-10V controlled lamps deployed inside the synchronous control venue as examples to demonstrate the compatible control ability of the dimmer for two typical drive protocol lamps. It should be clear that this example is only for illustrating the specific application scenarios of the invention technical solution, and the protection scope of the present invention is not limited to thyristor and 0-10V protocol lamps. Its innovative architecture is also applicable to LED lamps of other types of drive protocols, aiming to provide a universal unified control solution for lighting systems with multi-protocol hybrid deployment.

[0081] The above formulas are all dimensionless and take their numerical values for calculation. The formulas are obtained by collecting a large amount of data and performing software simulation to obtain a formula that is closest to the actual situation. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0082] The above embodiments can be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented using software, the above embodiments can be implemented in whole or in part in the form of a computer program product.

[0083] Those of ordinary skill in the art can realize that the modules and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0084] In addition, the functional modules in each embodiment of the present application can be integrated into one processing module, or each module can exist physically alone, or two or more modules can be integrated into one module.

[0085] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

[0086] Finally, the above is only the preferred embodiment of the present invention and is not used to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A distributed LED lamp control system based on dimmer control, characterized in that, The system includes: An environmental perception module that analyzes the physical positions of each lamp in the venue through power line carrier phase difference, synchronously fuses the illuminance, target density, and gas concentration data at the corresponding positions, and generates a logical scene tag with coordinate binding; A dimming decision module that generates dimming instructions for each lamp in the venue through dynamic scene adaptation decision-making based on the multi-dimensional feature fusion of the logical scene tag; An instruction issuing module that classifies the dimming instruction set according to the type of lamp driving protocol, and realizes instruction issuing by combining communication window segment control and dimming parameter sorting strategy; An execution control module that the lamp terminal analyzes the dimming instruction to execute brightness adjustment, monitors the lamp driving current fluctuation in real time to carry out local compensation, and switches to the constant current standby mode when an abnormality is detected.

2. The distributed LED lamp control system based on dimmer control according to claim 1, wherein: The physical positions of each lamp in the venue are obtained through the following process: A high-frequency carrier signal is injected into the output loop of each lamp in the venue through the built-in carrier signal generator of the dimmer, the phase offset of the echo signal of each lamp in the venue is measured, and combined with the preset multi-loop topology parameters of the dimmer, the physical position coordinates of each lamp in the venue are calculated by triangulation.

3. A distributed LED lamp control system based on a dimmer control, characterized in that: The logical scene tag is generated through the following process: The sensor cluster deployed in the venue is used to collect the instantaneous illuminance, target density, and gas concentration data in real time. The minimum monitoring unit is delimited according to the detection radius of the gas sensor in the sensor cluster, the venue space grid is divided based on the preset volume, and the divided grid is marked as a sensing monitoring grid; Extract the monitoring values of various gas concentrations collected in real time by each sensing monitoring grid in the venue, compare them with the preset concentration standards of the corresponding gas types, quantify the exceeding standard ratio of various gas concentration monitors, and determine the gas safety level of each sensing monitoring grid in the venue based on the preset gas safety level determination rule; Based on the target density value, instantaneous illuminance, and gas safety level of the sensing monitoring grid, generate the logical scene tag of each sensing monitoring grid in the venue.

4. A distributed LED lamp control system based on a dimmer control according to claim 3, characterized in that: The logical scene tag generation process also includes: Planning the polyhedron boundary of the lighting responsibility area according to the lamp physical position coordinates; When there is a spatial intersection between the lamp lighting responsibility area and the sensing monitoring grid, and the volume ratio of the intersection space to the sensing monitoring grid reaches the preset volume ratio, bind the logical scene tag of the sensing monitoring grid with the physical position coordinates of the lamp; If a lamp binds multiple logical scene tags, the label integration process is carried out according to the rule of replacing with the lowest gas safety level and taking the average value of the target density value and the instantaneous illuminance respectively, so as to obtain the logical scene tag bound to the coordinates of each lamp in the venue.

5. A distributed LED lamp control system based on a dimmer control, characterized in that: The generation of the dimming instruction for each lamp in the venue is as follows: If it is detected that the gas safety level in the logical scene tag bound to the lamp reaches or is lower than the preset warning level, trigger the lamp emergency dimming mode and generate a locked dimming instruction including fixed color temperature and brightness parameters; If the detected gas safety level is higher than the preset warning level, the following steps are executed: (1) Based on the physical location of the lamp, match the functional attributes of the site space, and call the target density-illuminance mapping table associated with the functional attributes of the site space. The mapping table includes the non-linear mapping relationship between the target density interval and the reasonable illuminance interval; (2) Obtain the reasonable illuminance interval associated with the target density value in the logical scene label bound to the lamp; (3) When the instantaneous illuminance exceeds the reasonable illuminance interval, execute: i. Calculate the absolute value of the deviation and the first derivative between the instantaneous illuminance and the reasonable illuminance interval; ii. Input the absolute value of the deviation and the first derivative into the preset fuzzy rule base, output the fuzzy set of the dimming amplitude and determine the dimming amplitude; iii. Perform gradient difference constraint verification on the dimming amplitude to generate an effective dimming instruction; (4) When the instantaneous illuminance is within the reasonable illuminance interval, automatically generate a null dimming instruction.

6. The distributed LED lamp control system based on dimmer control according to claim 5, wherein: The dimming instruction includes the lamp type identification code, the dimming amplitude, the dimming direction code, and the color temperature parameter. Among them, in the emergency dimming mode, the color temperature parameter of the lamp is locked to the preset warning color temperature, and in the non-emergency dimming mode, the default color temperature parameter configuration of the lamp is retained.

7. A distributed LED lamp control system based on a dimmer control, characterized in that: The instruction sending process is as follows: Based on the drive protocol type mapped by the lamp type identification code, classify the dimming instructions of each lamp in the site into a parallel sending instruction set and a serial sending instruction set; Divide the preset communication time window into three equally long first, second, and third sub-windows; Send each dimming instruction including the preset warning color temperature in the first sub-window; In the second sub-window, synchronously send the parallel sending instruction set through an independent physical channel, and sequentially send the serial sending instruction set through a shared bus after sorting in descending order according to the weighted result of the absolute value of the dimming amplitude and the dimming direction; In the third sub-window, detect the uncompleted instructions and trigger the retransmission mechanism.

8. A distributed LED lamp control system based on a dimmer control, characterized in that: The duration of each sub-window adopts a dynamic adjustment method, including: if the instructions in the first sub-window are completed in advance, the remaining duration is merged into the second sub-window; If the second sub-window times out and is not completed, it occupies the duration of the third sub-window to cover the remaining instructions.

9. A distributed LED lamp control system based on a dimmer control, characterized in that: The process of local compensation is as follows: Monitor the ripple amplitude of the lamp drive current in real time, compare the captured peak value of the lamp drive current fluctuation with the preset current allowable fluctuation threshold. When the peak value of the lamp drive current fluctuation exceeds the threshold and the exceeding ratio is less than the preset ratio limit, identify the change trend of the peak value of the lamp drive current fluctuation to determine the lamp brightness compensation direction; Synchronously collect the duration and amplitude of the current fluctuation of the lamp to generate the brightness compensation amount, superimpose the brightness compensation amount combined with the brightness compensation direction on the original dimming instruction. When it is detected that the peak value of the lamp drive current fluctuation falls back within the threshold range, control the lamp brightness to gradually return to the original instruction target value.

10. A distributed LED lamp control system based on dimmer control according to claim 9, characterized in that: The process of switching to the constant current standby mode is as follows: When it is detected that the peak value of the lamp drive current fluctuation continuously exceeds the threshold for the first preset duration, or the exceeding ratio is greater than or equal to the preset ratio limit, it is determined that the lamp drive current is in an abnormal state; Cut off the main drive circuit of the lamp, switch to the constant current standby mode to maintain the basic lighting of the lamp, and cyclically detect the status of the main drive module in the constant current standby mode. If the abnormal status still persists after the second preset duration, trigger power-off protection and report the fault information.

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