Dimming method of multifunctional mining lamp and related equipment

Abstract

The invention discloses a dimming method of a multifunctional mining lamp and related equipment. The method comprises the following steps: obtaining original illumination data and generating a panoramic illumination distribution diagram by sequentially lightening and controlling LEDs; performing polar coordinate system conversion and partition extraction on the illumination distribution diagram to obtain light spot deformation characteristics and brightness fluctuation characteristics, and calculating illumination transition continuity parameters; calculating an LED influence degree weight value according to a time sequence change rule of the feature data, and performing partition clustering; calculating a compensation parameter based on the initial parameter of the LED in each partition and generating a compensation sequence; and carrying out grading adjustment and dynamic correction on the LED according to the compensation sequence. According to the technical scheme, the mapping relation between the magnetic field interference and the LED luminous intensity fluctuation is established by analyzing the light spot distribution characteristics of the working plane, the spatial distribution characteristics of the annular LED array are combined, the partition dynamic compensation strategy is adopted, the problem of uneven illumination of the LED mining lamp in the high-intensity magnetic field environment is effectively solved, and the working efficiency is improved. And the lighting effect and the monitoring quality of an industrial site are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of LED lighting control, and particularly to a dimming method for a multi-functional industrial and mining lamp and related equipment. Background Art

[0002] With the rapid development of industrial intelligence, multi-functional industrial and mining lamps, as a new type of lighting equipment, have been widely used in industrial sites. Such industrial and mining lamps can provide lighting through an LED array and realize real-time monitoring of the working area through a camera, thus meeting the integrated requirements of modern industrial production for lighting and monitoring.

[0003] In industrial sites, strong magnetic field environments will be generated during the start-stop of large equipment and welding operations. These magnetic fields will interfere with the LED drive circuit, resulting in fluctuations in the luminous intensity of the LED light source. Since the industrial and mining lamp adopts the layout of an LED array, the magnetic field interference levels received by LEDs at different positions are different, and this differential interference will form a dynamically changing light distribution on the working plane. When this uneven light distribution is superimposed on the imaging process of the camera, the acquisition quality of the image will be reduced. At present, industrial and mining lamps generally adopt a lighting control method based on current or temperature feedback. This control method is difficult to respond in a timely manner to the dynamic change characteristics of the magnetic field intensity and distribution, and cannot effectively compensate for the uneven light caused by magnetic field interference, thus affecting the lighting effect and monitoring quality in industrial sites. Summary of the Invention

[0004] The main object of the present invention is to solve the technical problems of uneven lighting and reduced monitoring image quality existing in existing multi-functional industrial and mining lamps in a strong magnetic field environment.

[0005] The first aspect of the present invention provides a dimming method for a multi-functional industrial and mining lamp. The dimming method for the multi-functional industrial and mining lamp includes: By sequentially controlling the lighting of the LEDs, obtaining the original light data of each LED, and generating a panoramic light distribution map in combination with the spatial position information of the LEDs, recording the initial drive current value and the initial PWM duty cycle of each LED; Performing polar coordinate transformation and partition extraction on the light data in the panoramic light distribution map, obtaining the deformation characteristics and brightness fluctuation characteristics of each LED spot, and calculating the light transition continuity parameter according to the overlapping area of adjacent LED spots to generate spot feature data; According to the time-sequence change rules of the deformation characteristics, brightness fluctuation characteristics, and light transition continuity parameter in the spot feature data, calculating the influence degree weight value of the LED, and performing partition clustering on the LEDs based on the influence degree weight value to obtain a differential compensation partition; Calculate compensation parameters based on the initial drive current values and initial PWM duty cycles of each LED in the differential compensation zone, and prioritize the LEDs based on the compensation parameters to generate an LED compensation sequence; Gradually adjust the drive current values and PWM duty cycles of the LEDs according to the LED compensation sequence, and correct the compensation parameters based on the adjusted light data to complete dynamic compensation control.

[0006] Preferably, the multifunctional industrial and mining lamp includes a rotatable camera and an annular LED array surrounding the camera; The method of obtaining the original light data of each LED by sequentially controlling the lighting of the LEDs, and generating a panoramic light distribution map in combination with the spatial position information of the LEDs, and recording the initial drive current value and initial PWM duty cycle of each LED, includes: Divide the annular LED array into N sectors, each sector contains M LEDs, and based on the sector division, alternately light the LEDs in adjacent sectors to generate an LED lighting timing sequence; During the lighting of each LED, divide the 360-degree rotation scan of the camera into P sampling points, and record the light intensity value and camera rotation angle of the corresponding LED at each sampling point to generate angle-light intensity sampling data of the LED; According to the angle-light intensity sampling data, calculate the maximum light intensity value, minimum light intensity value and average light intensity value of each LED, and screen out the effective sampling data; Based on the effective sampling data and the rotation angle of the camera, determine the light coverage range of each LED to form a light distribution map of each LED; Overlay the light distribution maps of each LED in the order of the positions of the LEDs in the annular array to generate a panoramic light distribution map, and record the initial drive current value and initial PWM duty cycle of each LED during the lighting process.

[0007] Preferably, the step of dividing the 360-degree rotation scan of the camera into P sampling points during the lighting of each LED, and recording the light intensity value and camera rotation angle of the corresponding LED at each sampling point to generate angle-light intensity sampling data of the LED, includes: Before the LEDs are sequentially lit, perform a 360-degree background scan on the working environment, obtain a background image every 1 degree, and generate magnetic field interference intensity distribution data of the working environment by analyzing the pixel gray value fluctuations in the background image; Divide the magnetic field interference intensity distribution data into three interference levels: strong, medium, and weak. Based on the interference levels, arrange sampling points in the 360-degree rotation range. Specifically, set a sampling point every 3 degrees in the strong interference area, every 6 degrees in the medium interference area, and every 9 degrees in the weak interference area to form a position sequence of P sampling points. Light up the LEDs in the annular LED array in a clockwise direction. After each LED is lit, drive the camera to perform a 360-degree rotation scan according to the position sequence. When the camera rotates to each sampling point, obtain the LED illumination image corresponding to the sampling point, and extract the maximum pixel value in the central area from the LED illumination image as the illumination intensity value of the LED. Associate the camera rotation angle, LED illumination intensity value, and corresponding background image pixel value of each sampling point. Eliminate the environmental light interference by subtracting the background image pixel value from the LED illumination intensity value to generate the angle-intensity sampling data of the LED.

[0008] Preferably, perform polar coordinate transformation and partition extraction on the illumination data in the panoramic illumination distribution map to obtain the deformation characteristics and brightness fluctuation characteristics of each LED light spot. Calculate the illumination transition continuity parameter according to the overlapping area of adjacent LED light spots to generate the light spot feature data, including: Extract the boundary points of each LED light spot area in the panoramic illumination distribution map, and establish a polar coordinate system with the geometric center of the LED light spot as the pole. Convert the boundary points into polar coordinate representations to obtain the polar coordinate boundary data of the LED light spot. Truncate the polar coordinate boundary data at fixed radius intervals in the radial direction of the polar coordinate system, calculate the intersection coordinates of each truncated ring and the LED light spot, and use the deviation between the intersection coordinates and the nominal light spot radius of the LED as the light spot deformation characteristic. Perform equiangular interval sampling on the polar coordinate boundary data in the circumferential direction of the polar coordinate system, calculate the difference in illumination intensity between adjacent sampling points, and use the variation law of the illumination intensity difference with the angle as the brightness fluctuation characteristic. In the overlapping area of adjacent LED light spots, perform superposition calculation on the polar coordinate boundary data of the two LED light spots to obtain the illumination intensity distribution curve of the overlapping area, and use the change rate of the illumination intensity distribution curve as the illumination transition continuity parameter. Associate and combine the light spot deformation characteristics, brightness fluctuation characteristics, and illumination transition continuity parameters to generate the light spot feature data.

[0009] Preferably, calculating the influence degree weight value of the LED according to the deformation characteristics, brightness fluctuation characteristics and the time sequence change law of the illumination transition continuity parameter in the spot characteristic data, and performing partition clustering on the LED based on the influence degree weight value to obtain a differential compensation partition, including: Sampling the deformation characteristics, brightness fluctuation characteristics and illumination transition continuity parameter in the spot characteristic data according to the time series, and extracting the frequency components of each parameter through Fourier transform to obtain the time series change parameter of the spot characteristic; According to the time series change parameter, calculating the fluctuation period and fluctuation amplitude of each parameter in the spot characteristic data to obtain the time series change law of the spot characteristic; Based on the time series change law, quantifying the fluctuation degree of the spot characteristic data of each LED to obtain the influence degree weight value of the LED; Performing spatial distribution analysis on the influence degree weight value, and dividing the LEDs in the annular LED array with the difference value of the weight value less than the first preset threshold and adjacent positions into the same partition to obtain the initial partition of the LED; Performing time series correlation analysis on the LEDs in the initial partition, and adjusting the partition boundary based on the time series change law of the LED spot characteristic data to obtain a differential compensation partition.

[0010] Preferably, calculating the compensation parameter according to the initial drive current value and the initial PWM duty ratio of each LED in the differential compensation partition, and performing priority sorting on the LED based on the compensation parameter to generate an LED compensation sequence, including: Calculating the drive margin for the initial drive current value of each LED in the differential compensation partition, obtaining the maximum drive current adjustment range of the LED, and taking the product of the maximum drive current adjustment range and the influence degree weight value of the LED as the drive compensation coefficient of the LED; Performing peak analysis on the initial PWM duty ratio of each LED in the differential compensation partition, obtaining the maximum PWM adjustment range of the LED, and taking the product of the maximum PWM adjustment range and the influence degree weight value of the LED as the PWM compensation coefficient of the LED; According to the drive compensation coefficient and the PWM compensation coefficient, calculating the compensation combination value of the LED under two adjustment modes, and taking the compensation combination value as the compensation parameter of the LED; Classifying the LEDs in the differential compensation partition according to the size of the compensation parameter, and numbering the LEDs at the same level in the order of the LED positions to obtain the hierarchical compensation number of the LED; Arranging the hierarchical compensation numbers in descending order to generate an LED compensation sequence.

[0011] Preferably, the driving current value and PWM duty ratio of the LED are hierarchically adjusted according to the LED compensation sequence, and the compensation parameters are corrected based on the adjusted illumination data to complete the dynamic compensation control, including: The LEDs in the LED compensation sequence are divided into three compensation levels of large, medium, and small according to the size of the compensation parameters, and a driving current adjustment step and a PWM duty ratio adjustment step are set for the compensation parameters of each level to generate first hierarchical adjustment parameters; According to the first hierarchical adjustment parameters, the driving current value of each LED is adjusted first, and then the PWM duty ratio is adjusted to obtain the compensated illumination data after each adjustment, and the compensation response curve of the LED is obtained; Perform fluctuation analysis on the compensation response curve, calculate the deviation value of the compensated illumination data before and after adjustment, and use the ratio of the deviation value to the compensation parameter as the compensation effect coefficient; Based on the compensation effect coefficient, correct the adjustment step of the first hierarchical adjustment parameters to obtain second hierarchical adjustment parameters; Re - execute the compensation adjustment according to the second hierarchical adjustment parameters in the LED compensation sequence, dynamically correct the compensation parameters, and complete the dynamic compensation control.

[0012] Preferably, the step of dividing the LEDs in the LED compensation sequence into three compensation levels of large, medium, and small according to the size of the compensation parameters, and setting a driving current adjustment step and a PWM duty ratio adjustment step for the compensation parameters of each level to generate first hierarchical adjustment parameters includes: Perform temperature characteristic analysis on each LED in the LED compensation sequence, perform correlation calculation on the compensation parameter of the LED and the corresponding change amount of the LED junction temperature, and obtain the temperature sensitivity coefficient of the LED; Based on the temperature sensitivity coefficient, rearrange the LED compensation sequence, and classify the LEDs with a temperature sensitivity coefficient difference less than the second preset threshold into the same subsequence to generate a temperature grouping sequence; Sort the LEDs in the temperature grouping sequence according to the size of the compensation parameters, and divide the compensation parameters into threshold ranges of three levels of large, medium, and small according to the thermal accumulation effect of the LEDs to obtain hierarchical thresholds; Classify the LEDs according to the hierarchical thresholds, calculate the driving current adjustment step of each level based on the temperature sensitivity coefficient of the LED, calculate the PWM duty ratio adjustment step of each level based on the response time of the LED, and generate a step matrix; Map and combine the step matrix with the level information of the LEDs to generate first hierarchical adjustment parameters.

[0013] The second aspect of the present invention provides a dimming device for a multifunctional industrial and mining lamp, and the dimming device for the multifunctional industrial and mining lamp includes: A panoramic distribution map acquisition module, configured to obtain the original illumination data of each LED by sequentially controlling the lighting of the LEDs, and generate a panoramic illumination distribution map in combination with the spatial position information of the LEDs, and record the initial drive current value and the initial PWM duty cycle of each LED; A spot feature extraction module, configured to perform polar coordinate system conversion and partition extraction on the illumination data in the panoramic illumination distribution map, obtain the deformation features and brightness fluctuation features of each LED spot, and calculate the illumination transition continuity parameter according to the overlapping area of adjacent LED spots, and generate spot feature data; A partition clustering module, configured to calculate the influence degree weight value of the LED according to the temporal variation law of the deformation feature, brightness fluctuation feature and illumination transition continuity parameter in the spot feature data, and perform partition clustering on the LEDs based on the influence degree weight value to obtain a differential compensation partition; A compensation sequence generation module, configured to calculate compensation parameters according to the initial drive current value and the initial PWM duty cycle of each LED in the differential compensation partition, and perform priority sorting on the LEDs based on the compensation parameters to generate an LED compensation sequence; A dynamic compensation control module, configured to perform hierarchical adjustment on the drive current value and the PWM duty cycle of the LEDs according to the LED compensation sequence, and correct the compensation parameters based on the adjusted illumination data to complete the dynamic compensation control.

[0014] The third aspect of the present invention provides a dimming device for a multifunctional industrial and mining lamp, including: a memory and at least one processor, wherein instructions are stored in the memory, and the memory and the at least one processor are interconnected by a line; the at least one processor calls the instructions in the memory to enable the dimming device of the multifunctional industrial and mining lamp to execute the steps of the above-mentioned dimming method for the multifunctional industrial and mining lamp.

[0015] The fourth aspect of the present invention provides a computer-readable storage medium, in which instructions are stored, and when it runs on a computer, it enables the computer to execute the steps of the above-mentioned dimming method for the multifunctional industrial and mining lamp.

[0016] The technical solution provided by the embodiments of the present application, through the individual lighting control of the LEDs, obtains the original illumination data of each LED when it works alone, and generates a panoramic illumination distribution map in combination with the spatial position information of the LEDs. This independent acquisition method can accurately capture the illumination performance of each LED in a strong magnetic field environment, avoiding the illumination superposition interference when multiple LEDs work simultaneously.

[0017] After obtaining the panoramic light intensity distribution map, the method performs polar coordinate transformation and zonal extraction on the light data. The introduction of the polar coordinate system makes the spot analysis more suitable for the spatial characteristics of the annular LED array. By extracting the deformation characteristics and brightness fluctuation characteristics of the spots, and calculating the illumination transition continuity parameters of the overlapping regions of adjacent LED spots, the influence law of magnetic field interference on LED emission can be comprehensively reflected.

[0018] Based on the extracted spot feature data, the method analyzes its temporal variation law and calculates the degree weight value of each LED affected by the magnetic field. This weight calculation method based on temporal analysis can accurately reflect the differences in magnetic field interference on LEDs at different positions. By performing zonal clustering on adjacent LEDs with similar weight values, differential compensation zones are formed, laying a foundation for subsequent precise compensation.

[0019] In the compensation control link, the method calculates the compensation parameters according to the initial drive current value and the initial PWM duty cycle of the LEDs in each zone, determines the compensation priority based on the parameter size, and generates an LED compensation sequence. This zonal compensation strategy takes into account the spatial distribution characteristics of the LEDs, making the compensation more targeted.

[0020] When performing compensation, the method adjusts the drive current value and the PWM duty cycle of the LEDs in a hierarchical manner, and dynamically corrects the compensation parameters by real-time analyzing the light data after compensation. This dynamic compensation mechanism can respond in a timely manner to changes in magnetic field strength and distribution, continuously optimizing the illumination uniformity.

[0021] Through this complete processing flow from spot feature analysis to dynamic compensation control, the method establishes a mapping relationship between magnetic field interference and LED emission intensity fluctuation, realizes the adaptive compensation of the lighting system to a strong magnetic field environment, and solves the problem of uneven illumination of LED industrial and mining lamps in industrial sites. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 It is a schematic diagram of an embodiment of the dimming method for a multifunctional industrial and mining lamp in an embodiment of the present invention; Figure 2 It is a schematic diagram of an embodiment of the dimming device for a multifunctional industrial and mining lamp in an embodiment of the present invention; Figure 3Schematic diagram of an embodiment of the dimming device for the multi-functional industrial and mining lamp in the embodiments of the present invention; Figure 4 Schematic structural diagram of an embodiment of the multi-functional industrial and mining lamp of the dimming device of the present invention.

[0024] The realization of the object of the present invention, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0025] 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 work fall within the protection scope of the present invention.

[0026] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "and / or" throughout the text includes three solutions. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution that A and B are satisfied at the same time. In addition, the technical solutions between the embodiments can be combined with each other, and it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0028] An embodiment of the present application provides a dimming method for a multi-functional industrial and mining lamp. Figure 1 It is a flowchart of a dimming method for a multi-functional industrial and mining lamp provided by an embodiment of the present application. In this embodiment, the method includes: Please refer to Figure 1 , by sequentially controlling the lighting of the LEDs, obtaining the original illumination data of each LED, and generating a panoramic illumination distribution map in combination with the spatial position information of the LEDs, and recording the initial drive current value and the initial PWM duty cycle of each LED; In one embodiment of the present invention, the multifunctional industrial and mining lamp includes a rotatably arranged camera and an annular LED array surrounding the camera; By sequentially controlling the lighting of the LEDs, obtaining the original light intensity data of each LED, and combining the spatial position information of the LEDs to generate a panoramic light intensity distribution map, and recording the initial drive current value and the initial PWM duty cycle of each LED, including: Divide the annular LED array into N sectors, each sector contains M LEDs. Based on the sector division, alternately light the LEDs in adjacent sectors to generate an LED lighting sequence; During the lighting of each LED, divide the 360-degree rotation scan of the camera into P sampling points, and record the light intensity value and the camera rotation angle corresponding to the LED at each sampling point to generate angle-light intensity sampling data of the LED; According to the angle-light intensity sampling data, calculate the maximum light intensity value, the minimum light intensity value, and the average light intensity value of each LED, and screen out the valid sampling data; Based on the valid sampling data and the rotation angle of the camera, determine the light coverage range of each LED to form a light intensity distribution map of each LED; Overlay the light intensity distribution maps of each LED in the order of the positions of the LEDs in the annular array to generate a panoramic light intensity distribution map, and record the initial drive current value and the initial PWM duty cycle of each LED during the lighting process.

[0029] The following specifically describes the steps involved in the above embodiments: According to the annular structure characteristics of the industrial and mining lamp, divide the annular LED array into N sectors, each sector contains M LEDs. For example, the value of N can be selected as 8, and the specific value of M is not limited, and its value is greater than 2. Based on this sector division method, alternately control the lighting of the LEDs in adjacent sectors. For example, when the LEDs in sector 1 are lit one by one, the LEDs in sector 2 and sector 8 are in the off state. This alternating lighting method avoids the light interference between adjacent LEDs. The programmable controller performs the lighting and extinguishing operations of the LEDs according to the set sector sequence and time interval to generate an LED lighting sequence. In a strong magnetic field environment, when large equipment starts and stops, the alternating lighting mode of the LEDs in adjacent sectors can effectively identify the influence degree of magnetic field interference on the LEDs at different positions.

[0030] During each LED lighting period, the camera performs a 360-degree rotational scan. A stepper motor is used to drive the camera to rotate at a constant angular velocity. A sampling point is set every 10 degrees, for a total of 36 sampling points. At each sampling point, the camera captures the luminous image of the LED, calculates the average gray value of the central region of the image as the light intensity value of the LED, and simultaneously records the corresponding rotation angle of the camera. Since the magnetic field interference in the industrial site has the characteristic of uneven spatial distribution, collecting the light intensity data at multiple angles during each LED lighting period can comprehensively reflect the luminous characteristics of the LED in different directions. For the 36 groups of angle-light intensity data collected, the angle-light intensity sampling data of the LED is formed.

[0031] Statistical analysis is performed on the angle-light intensity sampling data of each LED. The maximum value, minimum value, and average value of the light intensity values at the 36 sampling points are calculated. Based on these three statistical values, a screening criterion is set: when the deviation of the light intensity value at a certain sampling point from the average value exceeds 20%, the data at that sampling point is marked as an outlier. This data screening method mainly targets the instantaneous strong magnetic field interference generated by welding in the industrial site. By removing the outliers, the effective sampling data with fluctuations within a reasonable range is retained.

[0032] The effective sampling data after screening is obtained by interpolation calculation to get the continuous light intensity curve of the LED. Combining with the rotation angle information of the camera, the light intensity coverage range of the LED is determined. Since the luminous angle of each LED in the annular LED array is 120 degrees, when determining the light intensity coverage range, the light intensity data within the 120-degree luminous angle is mainly analyzed. By analyzing the distribution law of the light intensity within the luminous angle range, a light intensity distribution map representing the luminous characteristics of a single LED is generated.

[0033] According to the layout characteristics of the annular LED array, the central angle between adjacent LEDs is 15 degrees. In the order of the positions of the LEDs in the annular array, the light intensity distribution maps of each LED are superimposed and calculated. During the superposition process, the light intensity values in the overlapping areas are processed by weighted average, and the weight coefficient is inversely proportional to the distance from the LED to the sampling point. This superposition method based on spatial position fully considers the luminous characteristics and installation positions of the LEDs, and finally generates a panoramic light intensity distribution map reflecting the light intensity state of the entire working plane. While generating the panoramic light intensity distribution map, the corresponding drive current value and PWM duty cycle when each LED is lit are recorded, and these initial parameters are used as the reference values for subsequent compensation and adjustment.

[0034] In an embodiment of the present invention, during each LED lighting period, the 360-degree rotational scan of the camera is divided into P sampling points. At each sampling point, the light intensity value of the corresponding LED and the rotation angle of the camera are recorded, and the angle-light intensity sampling data of the LED is generated, including: Before the LEDs are sequentially lit, a 360-degree background scan of the working environment is performed, and a background image is obtained every 1 degree. By analyzing the pixel gray value fluctuations in the background images, magnetic field interference intensity distribution data of the working environment is generated; The magnetic field interference intensity distribution data is divided into three interference levels: strong, medium, and weak. Sampling points are arranged in the 360-degree rotation range according to the interference levels. Among them, one sampling point is set every 3 degrees in the strong interference area, one sampling point is set every 6 degrees in the medium interference area, and one sampling point is set every 9 degrees in the weak interference area, forming a position sequence of P sampling points; The LEDs in the annular LED array are sequentially lit in the clockwise direction. After each LED is lit, the camera is driven to perform a 360-degree rotation scan according to the position sequence; When the camera rotates to each sampling point, the LED illumination image corresponding to the sampling point is obtained, and the maximum pixel value in the central area is extracted from the LED illumination image as the illumination intensity value of the LED; The camera rotation angle, LED illumination intensity value, and corresponding background image pixel value of each sampling point are associated, and the ambient light interference is eliminated by subtracting the background image pixel value from the LED illumination intensity value, generating LED angle-light intensity sampling data.

[0035] The following specifically describes the steps involved in the above embodiments: Before the LEDs are lit, the camera is driven by a stepper motor to perform a 360-degree environmental scan. The camera takes a background image every 1 degree of rotation, and the pixel gray value of each background image represents the environmental illumination intensity at that position. During image processing, the data within a 512×512 pixel range in the central area of the image is selected, and the average value of the pixel gray values in this area is calculated. By performing a gray value time series analysis on 360 consecutive background images, when the gray value of the background image at a certain angular position shows periodic fluctuations, it indicates that there is a magnetic field interference source in this area. In an industrial site, when a large lifting device is operating, the gray value fluctuation amplitude of the background image within a 90-degree range around it reaches 15%; when a welding device is working, the gray value fluctuation amplitude of the background image within a 45-degree range around it reaches 25%. By analyzing the fluctuation amplitude and frequency of the background image gray value, data representing the magnetic field interference distribution of the working environment is generated.

[0036] Based on the magnetic field interference intensity distribution data, the 360-degree rotation range is divided into three interference levels: when the fluctuation amplitude of the background image gray value exceeds 20%, the area is divided into a strong interference area; when the fluctuation amplitude is between 10% and 20%, it is divided into a medium interference area; when the fluctuation amplitude is less than 10%, it is divided into a weak interference area. A sampling point is set every 3 degrees in the strong interference area, and this dense sampling method targets the local influence of strong magnetic field sources such as welding equipment; a sampling point is set every 6 degrees in the medium interference area, which is suitable for the magnetic field interference generated by the operation of large equipment; a sampling point is set every 9 degrees in the weak interference area to meet the basic monitoring requirements. This differential sampling point arrangement method forms a position sequence containing 120 sampling points.

[0037] An LED driver is used to control the ring-by-ring lighting of the LEDs in the disc base of the industrial and mining lamp. With the camera as the center, the LEDs are lit in the order from the inner ring to the outer ring, and the LEDs within each ring are lit in a clockwise direction in turn. Suppose the industrial and mining lamp base is provided with 3 LED rings, the inner ring radius is 20 cm, the middle ring radius is 35 cm, the outer ring radius is 50 cm, and the center interval of adjacent LEDs is 15 degrees. When an LED is lit, the other LEDs located in the same radial direction remain extinguished, and the lighting interval of adjacent LEDs is set to 500 ms. In the industrial field, when a large device starts and stops every 5 seconds, this lighting interval can ensure that the light emission changes of a single LED during the start and stop of the device are collected.

[0038] During the rotation of the camera, every time it reaches the sampling point in the position sequence, the camera captures a frame of LED illumination image with a resolution of 1920×1080. To reduce the influence of edge divergence light, a 512×512 pixel area in the center of the image is selected as the effective analysis area, and the maximum pixel value in this area is extracted as the illumination intensity value of the LED in this direction. Since the industrial and mining lamp uses a multi-ring LED arrangement, the inner ring LEDs have a smaller light-emitting area but higher light intensity, while the outer ring LEDs have a larger light-emitting area but lower light intensity. This central area extraction method can accurately reflect the main light intensity distribution characteristics of the LEDs at different ring positions.

[0039] The data obtained for each sampling point is correlated to establish a data set that includes the camera rotation angle, the LED light intensity value, and the corresponding background image pixel values. By subtracting the background image pixel values at the corresponding angles from the LED light intensity values, the influence of ambient light on the measurement is eliminated. For example, in the welding operation area, where the background image pixel values fluctuate by 25%, the LED angle-light intensity sampling data obtained by this processing method only reflects the light-emitting characteristics of the LED itself, removing the interference of the welding arc. For LEDs at different ring positions, this processing method also takes into account the distance difference between the LED and the camera, and corrects the light intensity value through a distance compensation coefficient, so that the angle-light intensity sampling data can objectively reflect the actual light-emitting state of the LED.

[0040] Please continue to refer to Figure 1 , perform polar coordinate transformation and partition extraction on the light data in the panoramic light distribution map, obtain the deformation characteristics and brightness fluctuation characteristics of each LED light spot, and calculate the light transition continuity parameter based on the overlapping area of adjacent LED light spots to generate light spot feature data; In an embodiment of the present invention, the performing polar coordinate transformation and partition extraction on the light data in the panoramic light distribution map, obtaining the deformation characteristics and brightness fluctuation characteristics of each LED light spot, and calculating the light transition continuity parameter based on the overlapping area of adjacent LED light spots to generate light spot feature data includes: Extract the boundary points for each LED light spot area in the panoramic light distribution map, and establish a polar coordinate system with the geometric center of the LED light spot as the pole, convert the boundary points into polar coordinate representations, and obtain the polar coordinate boundary data of the LED light spot; Truncate the polar coordinate boundary data at fixed radius intervals in the radial direction of the polar coordinate system, calculate the intersection coordinates of each truncated ring and the LED light spot, and use the deviation of the intersection coordinates from the nominal light spot radius of the LED as the light spot deformation characteristic; Perform equiangular interval sampling on the polar coordinate boundary data in the circumferential direction of the polar coordinate system, calculate the difference in light intensity between adjacent sampling points, and use the variation law of the light intensity difference with the angle as the brightness fluctuation characteristic; In the overlapping area of adjacent LED light spots, perform superposition calculation on the polar coordinate boundary data of the two LED light spots to obtain the light intensity distribution curve of the overlapping area, and use the change rate of the light intensity distribution curve as the light transition continuity parameter; Correlate and combine the light spot deformation characteristic, brightness fluctuation characteristic, and light transition continuity parameter to generate light spot feature data.

[0041] The following specifically describes the steps involved in the above embodiments: Perform image processing on each LED spot area in the panoramic light intensity distribution map. By setting the light intensity threshold to 20% of the maximum value, extract the boundary points of the spot. The image processing system automatically calculates the centroid position of the spot area as the geometric center, sets this center point as the pole of the polar coordinate system, and establishes a local polar coordinate system. In this polar coordinate system, convert the rectangular coordinates (x, y) of the boundary points to polar coordinate representation (r, θ), where r represents the distance from the boundary point to the pole, and θ represents the angle of the boundary point relative to the reference axis. This conversion makes the position information of the boundary points more suitable for describing the characteristics of circular spots. For example, for the LEDs on the ring of an industrial and mining lamp, when it is affected by a 10 Hz alternating magnetic field, the boundary points of the spot show periodic radial fluctuations in polar coordinates.

[0042] In the polar coordinate system, set a radial truncation every 5 mm outward from the center of the spot until the entire spot area is covered. Calculate the intersection coordinates of each truncated ring and the spot boundary to obtain a set of sampling points describing the spot contour. Compare these intersection coordinates with the nominal spot radius of the LED without magnetic field interference (determined by the LED specification parameters) and calculate the deviation. Taking the outer ring LED of an industrial and mining lamp as an example, when it is close to the working area of a welding machine, the deviation of the spot radius in the direction of the welding machine current reaches 8 mm, while the deviation perpendicular to the current direction is only 2 mm. This non-uniform deformation characteristic directly reflects the directionality of the magnetic field interference.

[0043] In the processing of polar coordinate boundary data, take an angular sampling point every 10 degrees and calculate the difference in light intensity between adjacent sampling points. When the industrial and mining lamp is installed 2 meters away from a large device, the difference in light intensity between adjacent sampling points of the inner ring LED reaches 15% at the moment when the device starts, and drops to 5% when the device is running stably. This variation law of the light intensity difference with the angle reflects the dynamic impact of magnetic field interference on the light emission of the LED.

[0044] Since the industrial and mining lamp uses a multi-ring LED layout, the spots of adjacent LEDs overlap. In the overlapping area, numerically superimpose the polar coordinate boundary data of the two LEDs to obtain the light intensity distribution curve in this area. Calculate the change rate of this curve in the overlapping area, that is, the change speed of the light intensity with position. Under normal working conditions, the change rate of the light intensity distribution curve in the overlapping area remains within 0.2 / mm, while when affected by magnetic field interference, this value will rise to 0.5 / mm, indicating that the light uniformity is damaged.

[0045] Combine the spot deformation characteristics (characterized by the radial deviation) of each LED, the brightness fluctuation characteristics (characterized by the angular light intensity difference), and the illumination transition continuity parameter (characterized by the change rate of the light intensity distribution curve in the overlapping area) into a feature vector. This feature vector contains the complete information of the LED spot in three dimensions: geometric shape, brightness distribution, and transition characteristics. For each LED in the industrial and mining lamp, this multi-dimensional feature data can comprehensively describe its abnormal light-emitting state under magnetic field interference.

[0046] Please continue to refer to Figure 1 , calculate the influence degree weight value of the LED according to the temporal variation law of the deformation characteristic, brightness fluctuation characteristic, and illumination transition continuity parameter in the spot feature data, and perform partition clustering on the LED based on the influence degree weight value to obtain a differential compensation partition; In an embodiment of the present invention, the calculating the influence degree weight value of the LED according to the temporal variation law of the deformation characteristic, brightness fluctuation characteristic, and illumination transition continuity parameter in the spot feature data, and performing partition clustering on the LED based on the influence degree weight value to obtain a differential compensation partition includes: Sample the deformation characteristic, brightness fluctuation characteristic, and illumination transition continuity parameter in the spot feature data according to the time series, extract the frequency components of each parameter through Fourier transform, and obtain the temporal variation parameters of the spot feature; According to the temporal variation parameters, calculate the fluctuation period and fluctuation amplitude of each parameter in the spot feature data to obtain the temporal variation law of the spot feature; Based on the temporal variation law, quantify the fluctuation degree of the spot feature data of each LED to obtain the influence degree weight value of the LED; Perform spatial distribution analysis on the influence degree weight value, and divide the LEDs in the annular LED array with a weight value difference less than the first preset threshold and adjacent positions into the same partition to obtain the initial partition of the LED; Perform temporal correlation analysis on the LEDs in the initial partition, and adjust the partition boundary based on the temporal variation law of the LED spot feature data to obtain a differential compensation partition.

[0047] The following specifically describes the steps involved in the above embodiment: With a sampling interval of 50 ms, continuous sampling is carried out on the deformation characteristics, brightness fluctuation characteristics and illumination transition continuity parameters in the spot feature data, and the sampling duration is set to 10 seconds. Fast Fourier transform is performed on each group of sampling data to obtain the frequency spectrum distribution in the range of 0 - 100 Hz. In the industrial field, when large-scale lifting equipment starts and stops operating with a cycle of 5 seconds, the magnetic field interference generated by it appears as a fundamental frequency of 0.2 Hz and its harmonic components in the frequency spectrum; the 50 Hz power frequency magnetic field generated during the operation of the welding machine appears as a significant 50 Hz main frequency component in the frequency spectrum. This frequency domain analysis method resolves the magnetic field interference generated by different industrial equipment into specific frequency characteristics.

[0048] Based on the Fourier transform results, the periods and amplitudes corresponding to the main frequency components in the spot feature data are extracted. Taking the outer ring LEDs of the industrial and mining lamp as an example, when it is 1 meter away from the welding machine, the spot deformation characteristics show periodic changes at 50 Hz, and the maximum deformation reaches 15% of the nominal radius of the spot; the fluctuation amplitude of the illumination intensity at 50 Hz reaches 10% of the nominal value; the fluctuation amplitude of the illumination transition continuity parameter in the overlapping area reaches 0.3 / mm. These fluctuation parameters reflect the influence intensity of the magnetic field interference on the light-emitting characteristics of the LEDs.

[0049] According to the fluctuation characteristics of each parameter, the comprehensive fluctuation value of the LED spot is calculated. The weights assigned to the deformation characteristics, brightness fluctuation characteristics and illumination transition continuity parameters are 0.4, 0.4 and 0.2 respectively. The normalized fluctuation values of the three characteristics are weighted and summed to obtain the influence degree weight value of the LED. The weight distribution takes into account the influence degree of different characteristics on the LED lighting effect. For example, in the welding area, the influence of deformation and brightness fluctuation on the monitoring imaging quality is more significant.

[0050] Statistical analysis of the spatial distribution of the influence degree weight value of the LED is carried out to calculate the difference in weight values between adjacent LEDs. The first preset threshold is set to 0.2. When the difference in weight values between adjacent LEDs is less than 0.2, these LEDs are divided into the same partition. The selection of the threshold is based on the actual observations in the industrial field: in the working area of the welding machine, the difference in weight values between adjacent LEDs is usually above 0.3; while in the area where the equipment is operating normally, the difference in weight values between adjacent LEDs remains around 0.1.

[0051] Perform pairwise correlation analysis on the LEDs in the initial partition, and calculate the temporal correlation coefficient of the LED spot feature data. When the correlation coefficient is greater than 0.8, even if the weight value differences of these LEDs exceed the first preset threshold, they are merged into the same partition. This partition adjustment based on temporal correlation takes into account the spatial continuity characteristics of magnetic field interference. In an industrial site, LEDs affected by the same magnetic field source often exhibit similar temporal variation patterns. For example, within the operating range of a lifting device, although there are differences in the weight values of LEDs at different ring positions, their spot features all show the same 5-second periodic variation pattern.

[0052] Please continue to refer to Figure 1 , calculate compensation parameters according to the initial drive current values and initial PWM duty cycles of the LEDs in the differential compensation partition, and perform priority sorting on the LEDs based on the compensation parameters to generate an LED compensation sequence; In an embodiment of the present invention, the calculating compensation parameters according to the initial drive current values and initial PWM duty cycles of the LEDs in the differential compensation partition, and performing priority sorting on the LEDs based on the compensation parameters to generate an LED compensation sequence includes: Calculate the drive margin for the initial drive current values of the LEDs in the differential compensation partition, obtain the maximum drive current adjustment range of the LEDs, and take the product of the maximum drive current adjustment range and the influence degree weight value of the LEDs as the drive compensation coefficient of the LEDs; Perform peak analysis on the initial PWM duty cycles of the LEDs in the differential compensation partition, obtain the maximum PWM adjustment range of the LEDs, and take the product of the maximum PWM adjustment range and the influence degree weight value of the LEDs as the PWM compensation coefficient of the LEDs; According to the drive compensation coefficient and the PWM compensation coefficient, calculate the compensation combination value of the LEDs under the two adjustment methods, and take the compensation combination value as the compensation parameter of the LEDs; Classify the LEDs in the differential compensation partition according to the size of the compensation parameters, and number the LEDs of the same level in the order of the LED positions to obtain the hierarchical compensation numbers of the LEDs; Arrange the hierarchical compensation numbers in descending order to generate an LED compensation sequence.

[0053] The following specifically describes the steps involved in the above embodiments: Analyze and calculate the initial drive current values of each LED in the differential compensation zone to determine the drive margin for each LED. Taking the inner-ring LEDs of industrial and mining lamps as an example, when the initial drive current is 350 mA, according to the LED specification parameters, its maximum allowable drive current is 700 mA. Considering a 20% safety margin, the maximum drive current adjustment range is obtained as 280 mA. Multiply this adjustment range by the weight value of the LED's influence degree to obtain the drive compensation coefficient of the LED. For example, when the weight value of the LED's influence degree is 0.8, its drive compensation coefficient is 224 mA, indicating that this LED has a large current adjustment space under strong magnetic field interference.

[0054] Perform peak analysis on the initial PWM duty cycle of the LED and record the light-emitting characteristics of the LED at different duty cycles. For an LED with an initial PWM duty cycle of 60%, through actual measurement, it is found that: when the duty cycle exceeds 90%, the LED junction temperature rises significantly; when the duty cycle is lower than 20%, the light-emitting uniformity of the LED deteriorates. Therefore, the maximum PWM adjustment range of the LED is set to ±30%. Multiply this adjustment range by the weight value of the LED's influence degree to obtain the PWM compensation coefficient of the LED. This PWM range limitation considering temperature characteristics ensures the working stability of the LED during the compensation process.

[0055] Substitute the drive compensation coefficient and PWM compensation coefficient of each LED into the compensation combination formula: Compensation combination value = 0.6 × drive compensation coefficient / maximum drive current adjustment range + 0.4 × PWM compensation coefficient / maximum PWM adjustment range. The weight coefficients 0.6 and 0.4 here are determined based on the LED response characteristics: Drive current adjustment has a faster response speed and is suitable for coping with the rapid changes of the magnetic field; PWM adjustment has a smaller thermal effect and is suitable for long-term stable operation. Take the calculated compensation combination value as the compensation parameter of the LED.

[0056] According to the size range of the compensation parameters, divide the LEDs in the differential compensation zone into three levels: those with a compensation parameter greater than 0.8 are classified as high level, those between 0.5 - 0.8 are classified as medium level, and those less than 0.5 are classified as low level. Within each level, number them in the order of the LED's position in the circular array (from the inner ring to the outer ring, and in the clockwise direction within each ring). This grading method reflects the severity of the magnetic field interference on the LEDs, and the numbering in the position order facilitates the implementation of orderly compensation control.

[0057] Arrange the grading compensation numbers of all LEDs in descending order according to the compensation parameters to generate the final LED compensation sequence. This sorting method ensures the priority of compensation: the LEDs with stronger magnetic field interference are compensated first, thus quickly improving the lighting quality of the local area. In industrial field applications, the LEDs close to the welding machine usually have higher compensation parameters, and the priority compensation of these LEDs effectively suppresses the influence of the welding process on the lighting uniformity.

[0058] Please continue to refer to Figure 1 , and perform hierarchical adjustment on the drive current value and PWM duty cycle of the LEDs according to the LED compensation sequence, and correct the compensation parameters based on the adjusted lighting data to complete the dynamic compensation control.

[0059] In an embodiment of the present invention, the performing hierarchical adjustment on the drive current value and PWM duty cycle of the LEDs according to the LED compensation sequence, and correcting the compensation parameters based on the adjusted lighting data to complete the dynamic compensation control includes: Divide the LEDs in the LED compensation sequence into three compensation levels: large, medium, and small according to the size of the compensation parameters, and set the drive current adjustment step and PWM duty cycle adjustment step for the compensation parameters of each level to generate the first hierarchical adjustment parameters; According to the first hierarchical adjustment parameters, first adjust the drive current value of each LED, and then adjust the PWM duty cycle to obtain the compensated lighting data after each adjustment, and obtain the compensation response curve of the LEDs; Perform fluctuation analysis on the compensation response curve, calculate the deviation value of the compensated lighting data before and after adjustment, and use the ratio of the deviation value to the compensation parameter as the compensation effect coefficient; Based on the compensation effect coefficient, correct the adjustment step of the first hierarchical adjustment parameters to obtain the second hierarchical adjustment parameters; Execute the compensation adjustment again according to the LED compensation sequence with the second hierarchical adjustment parameters, dynamically correct the compensation parameters, and complete the dynamic compensation control.

[0060] The following specifically describes the steps involved in the above embodiment: According to the compensation parameters in the LED compensation sequence, the LEDs are divided into three compensation levels: those with compensation parameters greater than 0.8 are classified as the large level, those between 0.5 and 0.8 are classified as the medium level, and those less than 0.5 are classified as the small level. The drive current adjustment step size for the large-level LEDs is set to 30 mA, and the PWM duty cycle adjustment step size is set to 5%; for the medium level, they are 20 mA and 3% respectively; for the small level, they are 10 mA and 1% respectively. These adjustment step size values are set based on the response characteristics of the LEDs: in a strong magnetic field environment, when the magnetic field change rate generated by the start and stop of large equipment reaches 0.1 T / s, the large-level LEDs require a larger adjustment step size to respond quickly; while for LEDs with less interference, using a smaller adjustment step size can provide more precise control.

[0061] Use the LED driver to perform compensation control on the LEDs according to the first classification adjustment parameters. During the adjustment process, first adjust the drive current step by step from the initial value at the set step size. After each adjustment, wait for 50 ms to eliminate the current transient response. Collect the luminous image of the LEDs through a camera, and extract the average gray value within the range of 512×512 pixels in the central area of the image as the compensated illumination data. When the drive current is adjusted to the optimal value, then adjust the PWM duty cycle at the set step size and collect the corresponding compensated illumination data. Taking the outer-ring LEDs of industrial and mining lamps as an example, when it is in the working area of the welding machine, during the process of increasing the drive current from 350 mA to 440 mA, the illumination data of 4 adjustments are recorded to form the compensation response curve of the LEDs.

[0062] Perform data processing on the compensation response curve of the LEDs, and calculate the deviation between the illumination data of each sampling point and the reference value before adjustment. Divide the deviation value by the compensation parameter of the LEDs to obtain the compensation effect coefficient. Taking the middle-ring LEDs of industrial and mining lamps as an example, when its compensation parameter is 0.7, if the deviation of the adjusted illumination intensity is 14%, the compensation effect coefficient is 0.2, indicating that the current adjustment step size fails to fully utilize the compensation space.

[0063] Adjust the first classification adjustment parameters according to the size of the compensation effect coefficient: when the compensation effect coefficient is greater than 0.3, increase the drive current adjustment step size of the corresponding level by 50%, and increase the PWM duty cycle adjustment step size by 30%; when the compensation effect coefficient is less than 0.1, reduce the two adjustment step sizes by 30% and 20% respectively. This dynamic step size adjustment mechanism takes into account the response characteristics of the LEDs to magnetic field interference of different intensities: a larger adjustment step size is required in a strong magnetic field area to quickly reach the compensation target, while a smaller adjustment step size is required in a weak magnetic field area to avoid overcompensation.

[0064] Re - execute the compensation adjustment using the second hierarchical adjustment parameter. Calculate a new compensation effect coefficient after each round of compensation and continuously update the adjustment parameter. In practical applications, when large - scale equipment starts and stops operating with a 5 - second cycle, this dynamic compensation process can complete parameter optimization within one operating cycle, controlling the fluctuation of the LED luminous intensity within the range of ±5%. This dynamic compensation mechanism based on real - time feedback overcomes the influence of dynamic changes in magnetic field strength and distribution on the LED luminous uniformity.

[0065] In an embodiment of the present invention, the LEDs in the LED compensation sequence are divided into three compensation levels: large, medium, and small according to the size of the compensation parameter, and a driving current adjustment step and a PWM duty - cycle adjustment step are set for the compensation parameters of each level to generate a first hierarchical adjustment parameter, including: Perform a temperature characteristic analysis on each LED in the LED compensation sequence, correlate and calculate the compensation parameter of the LED with the corresponding change in the LED junction temperature to obtain the temperature sensitivity coefficient of the LED; Rearrange the LED compensation sequence based on the temperature sensitivity coefficient, and group the LEDs with a temperature sensitivity coefficient difference less than a second preset threshold into the same subsequence to generate a temperature grouping sequence; Sort the LEDs in the temperature grouping sequence according to the size of the compensation parameter, and divide the compensation parameter into threshold ranges of three levels: large, medium, and small according to the thermal accumulation effect of the LED to obtain hierarchical thresholds; Classify the LEDs according to the hierarchical thresholds, calculate the driving current adjustment step of each level based on the temperature sensitivity coefficient of the LED, and calculate the PWM duty - cycle adjustment step of each level based on the response time of the LED to generate a step - length matrix; Map and combine the step - length matrix with the LED level information to generate a first hierarchical adjustment parameter.

[0066] The following is a specific description of the steps involved in the above - mentioned embodiment: Use an infrared thermometer to monitor the temperature of each LED in the LED compensation sequence and record the change in the junction temperature of the LED under different compensation parameters. For example, when the compensation parameter of the inner - ring LED of an industrial and mining lamp increases from 0.3 to 0.8, the junction temperature rises by 15°C. Divide the change in the compensation parameter by the change in the junction temperature to obtain the temperature sensitivity coefficient of the LED, which reflects the response degree of the LED luminous characteristics to temperature changes. For the outer - ring LED of the industrial and mining lamp, due to better heat dissipation conditions, the junction temperature only rises by 8°C under the same change in the compensation parameter, and the temperature sensitivity coefficient is smaller, indicating that its luminous characteristics are more stable.

[0067] Rearrange the LED compensation sequence based on the temperature sensitivity coefficient, and set the second preset threshold to 0.05 °C⁻¹. When the difference in temperature sensitivity coefficients between two LEDs is less than 0.05 °C⁻¹, they are grouped into the same subsequence. The selection of this threshold is based on the measured data in the industrial field: in the welding area, the difference in temperature sensitivity coefficients between adjacent LEDs reaches 0.1 °C⁻¹; while in the normal working area, the difference in temperature sensitivity coefficients remains around 0.03 °C⁻¹. Through this grouping method, LEDs with similar temperature characteristics are processed centrally to form a temperature grouping sequence.

[0068] Sort the LEDs in each temperature grouping sequence in descending order according to the compensation parameter. At the same time, measure the temperature cumulative effect of the LEDs during continuous compensation adjustment: when the compensation parameter is greater than 0.8, the LED junction temperature rises by more than 20 °C within 5 minutes; when the compensation parameter is in the range of 0.5 - 0.8, the junction temperature rise is maintained at 10 - 15 °C; when the compensation parameter is less than 0.5, the junction temperature rise does not exceed 8 °C. Based on this thermal cumulative characteristic, divide the compensation parameter into the following threshold ranges: large level > 0.8, medium level 0.5 - 0.8, small level < 0.5.

[0069] Calculate the adjustment step size according to the physical characteristics of the LEDs: for LEDs with a temperature sensitivity coefficient greater than 0.1 °C⁻¹, the adjustment step size of the drive current is calculated as 10 mA × (1 - temperature sensitivity coefficient × 10) to reduce temperature fluctuations; the adjustment step size of the PWM duty cycle is determined based on the response time of the LED (the time required for the light intensity to reach stability from receiving the adjustment instruction). For every 1 ms increase in the response time, the adjustment step size decreases by 0.5%. Arrange these two types of adjustment step sizes of different level LEDs into a matrix to form a step size matrix. This calculation method comprehensively considers the temperature characteristics and dynamic response characteristics of the LEDs.

[0070] Perform a corresponding mapping between the step size matrix and the level information of the LEDs: associate the row vector of the large level LEDs with their temperature sensitivity coefficient and response time to obtain the actual adjustment parameters of this level; perform the same operation on the medium level and small level LEDs. The finally generated first-level adjustment parameters include the optimal adjustment scheme for each LED under the constraints of temperature and response characteristics. In industrial field applications, this hierarchical adjustment method based on temperature characteristics effectively controls the fluctuation of the LED junction temperature and extends the service life of the LEDs.

[0071] The dimming method of the multi-functional industrial and mining lamp in the embodiment of the present invention has been described above. Next, the dimming device of the multi-functional industrial and mining lamp in the embodiment of the present invention will be described. Please refer to Figure 2 In an embodiment, the dimming device of the multi-functional industrial and mining lamp in the embodiment of the present invention includes: The panoramic distribution map acquisition module 101 is configured to obtain the original illumination data of each LED by sequentially controlling the lighting of the LEDs, generate a panoramic illumination distribution map in combination with the spatial position information of the LEDs, and record the initial drive current value and the initial PWM duty cycle of each LED; The spot feature extraction module 102 is configured to perform polar coordinate transformation and partition extraction on the illumination data in the panoramic illumination distribution map, obtain the deformation features and brightness fluctuation features of each LED spot, calculate the illumination transition continuity parameter according to the overlapping area of adjacent LED spots, and generate spot feature data; The partition clustering module 103 is configured to calculate the influence degree weight value of the LEDs according to the temporal variation law of the deformation features, brightness fluctuation features and illumination transition continuity parameters in the spot feature data, and perform partition clustering on the LEDs based on the influence degree weight value to obtain a differential compensation partition; The compensation sequence generation module 104 is configured to calculate compensation parameters according to the initial drive current value and the initial PWM duty cycle of each LED in the differential compensation partition, sort the LEDs according to the priority based on the compensation parameters, and generate an LED compensation sequence; The dynamic compensation control module 105 is configured to perform hierarchical adjustment on the drive current value and the PWM duty cycle of the LEDs according to the LED compensation sequence, and correct the compensation parameters based on the adjusted illumination data to complete the dynamic compensation control.

[0072] Above Figure 2 The dimming device of the multi-functional industrial and mining lamp in the embodiment of the present invention is described in detail from the perspective of modular functional entities. Next, the dimming device of the multi-functional industrial and mining lamp in the embodiment of the present invention will be described in detail from the perspective of hardware processing.

[0073] Figure 3FIG. 0 is a schematic structural diagram of a dimming device for a multifunctional industrial and mining lamp provided by an embodiment of the present invention. The dimming device 200 of the multifunctional industrial and mining lamp may vary greatly due to different configurations or performances, and may include one or more processors (central processing units, CPU) 210 (for example, one or more processors) and a memory 220, and one or more storage media 230 (for example, one or more mass storage device ends) storing application programs 233 or data 232. Among them, the memory 220 and the storage media 230 may be transient storage or persistent storage. The program stored in the storage media 230 may include one or more modules (not shown in the figure), and each module may include a series of instruction operations on the dimming device 200 of the multifunctional industrial and mining lamp. Further, the processor 210 may be configured to communicate with the storage media 230 and execute a series of instruction operations in the storage media 230 on the dimming device 200 of the multifunctional industrial and mining lamp to implement the steps of the above-mentioned dimming method for the multifunctional industrial and mining lamp.

[0074] The dimming device 200 of the multifunctional industrial and mining lamp may further include one or more power supplies 240, one or more wired or wireless network interfaces 250, one or more input / output interfaces 260, and / or one or more operating systems 231, such as Windows Serve, Mac OS X, Unix, Linux, FreeBSD, etc. Those skilled in the art can understand that Figure 3 the shown structural diagram of the dimming device of the multifunctional industrial and mining lamp does not constitute a limitation on the dimming device of the multifunctional industrial and mining lamp provided by the present invention, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0075] Specifically, the dimming device 200 of the multifunctional industrial and mining lamp has a multifunctional industrial and mining lamp, and the multifunctional industrial and mining lamp includes a rotatably arranged camera 1 and a ring-shaped LED array 2 surrounding the camera. For details, see Figure 4 Since both the camera 1 and the ring-shaped LED array 2 (composed of multiple independently controllable LED chips) are relatively common structures at present, they will not be described in detail here.

[0076] The present invention also provides a computer-readable storage medium, which may be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium. Instructions are stored in the computer-readable storage medium, and when the instructions run on a computer, the computer is caused to execute the steps of the dimming method for the multifunctional industrial and mining lamp.

[0077] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, or units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0078] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0079] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A dimming method for a multifunctional mining lamp, characterized in that: include: By lighting up the LEDs one by one, the original illumination data of each LED is obtained, and a panoramic illumination distribution map is generated in combination with the spatial position information of the LEDs, and the initial driving current value and initial PWM duty cycle of each LED are recorded; Perform polar coordinate system conversion and partition extraction on the illumination data in the panoramic illumination distribution map to obtain deformation characteristics and brightness fluctuation characteristics of each LED light spot, and calculate illumination transition continuity parameters according to overlapping areas of adjacent LED light spots to generate light spot feature data; According to the deformation characteristics, brightness fluctuation characteristics and time-series variation rules of the light transition continuity parameters in the light spot feature data, the influence weight value of the LED is calculated, and the LED is partitioned and clustered based on the influence weight value to obtain differentiated compensation partitions; Calculating compensation parameters according to the initial driving current value and the initial PWM duty cycle of each LED in the differentiated compensation partition, and prioritizing the LEDs based on the compensation parameters to generate an LED compensation sequence; The driving current value and PWM duty cycle of the LED are adjusted in stages according to the LED compensation sequence, and the compensation parameters are corrected based on the adjusted illumination data to complete dynamic compensation control.

2. The dimming method of the multifunctional mining lamp according to claim 1, characterized in that: The multifunctional mining lamp comprises a rotatable camera and a ring-shaped LED array surrounding the camera; The LEDs are lit up and controlled in sequence to obtain the original illumination data of each LED, and a panoramic illumination distribution diagram is generated in combination with the spatial position information of the LEDs, and the initial driving current value and initial PWM duty cycle of each LED are recorded, including: The circular LED array is divided into N sectors, each sector contains M LEDs, and based on the sector division, the LEDs in adjacent sectors are alternately lit to generate an LED lighting sequence; During the lighting period of each LED, the 360-degree rotation scan of the camera is divided into P sampling points, and the corresponding LED light intensity value and camera rotation angle are recorded at each sampling point to generate LED angle-light intensity sampling data; According to the angle-light intensity sampling data, the maximum light intensity value, the minimum light intensity value and the average light intensity value of each LED are calculated, and the effective sampling data are screened; Determine the illumination coverage of each LED based on the effective sampling data and the rotation angle of the camera to form an illumination distribution map of each LED; The illumination distribution diagrams of each LED are superimposed according to the position sequence of the LED in the ring array to generate a panoramic illumination distribution diagram, and the initial driving current value and initial PWM duty cycle of each LED during the lighting process are recorded.

3. The dimming method of the multifunctional mining lamp according to claim 2, characterized in that: During each LED lighting period, the 360-degree rotation scan of the camera is divided into P sampling points, and the corresponding LED light intensity value and camera rotation angle are recorded at each sampling point to generate LED angle-light intensity sampling data, including: Before the LEDs are turned on one by one, a 360-degree background scan is performed on the working environment, and a background image is obtained every 1 degree. By analyzing the fluctuation of the pixel grayscale value in the background image, the magnetic field interference intensity distribution data of the working environment is generated; The magnetic field interference intensity distribution data is divided into three interference levels: strong, medium and weak, and sampling points are arranged in a 360-degree rotation range according to the interference level, wherein a sampling point is set every 3 degrees in the strong interference area, a sampling point is set every 6 degrees in the medium interference area, and a sampling point is set every 9 degrees in the weak interference area, forming a position sequence of P sampling points; The LEDs in the annular LED array are sequentially lit in a clockwise direction. After each LED is lit, the camera is driven to perform a 360-degree rotation scan according to the position sequence; When the camera rotates to each sampling point, an LED illumination image corresponding to the corresponding sampling point is obtained, and the maximum pixel value of the central area is extracted from the LED illumination image as the illumination intensity value of the LED; The camera rotation angle, LED light intensity value and corresponding background image pixel value of each sampling point are associated, and the ambient light interference is eliminated by subtracting the background image pixel value from the LED light intensity value to generate the LED angle-light intensity sampling data.

4. The dimming method of the multifunctional mining lamp according to claim 1, characterized in that: The polar coordinate system conversion and partition extraction of the illumination data in the panoramic illumination distribution map are performed to obtain the deformation characteristics and brightness fluctuation characteristics of each LED light spot, and the illumination transition continuity parameters are calculated according to the overlapping areas of adjacent LED light spots to generate light spot feature data, including: Extracting boundary points of each LED spot area in the panoramic illumination distribution map, establishing a polar coordinate system with the geometric center of the LED spot as the pole, converting the boundary points into polar coordinates, and obtaining polar coordinate boundary data of the LED spot; The polar coordinate boundary data is truncated in the radial direction of the polar coordinate system at fixed radius intervals, the intersection coordinates of each truncated circular ring and the LED light spot are calculated, and the deviation between the intersection coordinates and the LED nominal light spot radius is used as the light spot deformation feature; The polar coordinate boundary data is sampled at equal angle intervals in the circumferential direction of the polar coordinate system, the difference in light intensity between adjacent sampling points is calculated, and the variation law of the light intensity difference with angle is used as a brightness fluctuation feature; In the overlapping area of ​​adjacent LED light spots, the polar coordinate boundary data of two LED light spots are superimposed and calculated to obtain a light intensity distribution curve of the overlapping area, and the change rate of the light intensity distribution curve is used as a light transition continuity parameter; The light spot deformation characteristics, brightness fluctuation characteristics and illumination transition continuity parameters are associated and combined to generate light spot characteristic data.

5. The dimming method of the multifunctional mining lamp according to claim 1, characterized in that: The method calculates the influence weight value of the LED according to the deformation characteristics, brightness fluctuation characteristics and the time-series change law of the light transition continuity parameter in the light spot feature data, and partitions and clusters the LEDs based on the influence weight value to obtain differentiated compensation partitions, including: The deformation characteristics, brightness fluctuation characteristics and illumination transition continuity parameters in the light spot characteristic data are sampled in time series, and the frequency components of each parameter are extracted by Fourier transform to obtain the time series variation parameters of the light spot characteristics; According to the time series variation parameters, the fluctuation period and fluctuation amplitude of each parameter in the light spot characteristic data are calculated to obtain the time series variation law of the light spot characteristics; Based on the time series variation law, the fluctuation degree of the light spot characteristic data of each LED is quantified to obtain the influence degree weight value of the LED; Performing spatial distribution analysis on the influence degree weight values, dividing LEDs in the annular LED array whose weight value difference is less than a first preset threshold and whose positions are adjacent into the same partition, to obtain an initial partition of the LEDs; A time-series correlation analysis is performed on the LEDs in the initial partition, and the partition boundaries are adjusted based on the time-series variation rules of the LED light spot feature data to obtain differentiated compensation partitions.

6. The dimming method of the multifunctional mining lamp according to claim 1, characterized in that: The step of calculating compensation parameters according to the initial driving current value and the initial PWM duty cycle of each LED in the differentiated compensation partition, and prioritizing the LEDs based on the compensation parameters to generate an LED compensation sequence includes: Calculating the driving margin for the initial driving current value of each LED in the differentiated compensation partition, obtaining the maximum driving current adjustment range of the LED, and taking the product of the maximum driving current adjustment range and the influence degree weight value of the LED as the driving compensation coefficient of the LED; Performing peak value analysis on the initial PWM duty cycle of each LED in the differentiated compensation partition to obtain the maximum PWM adjustment range of the LED, and taking the product of the maximum PWM adjustment range and the influence weight value of the LED as the PWM compensation coefficient of the LED; Calculate the compensation combination value of the LED under two adjustment modes according to the driving compensation coefficient and the PWM compensation coefficient, and use the compensation combination value as the compensation parameter of the LED; The LEDs in the differentiated compensation partition are graded according to the compensation parameter size, and the LEDs of the same grade are numbered according to the position sequence of the LEDs to obtain the graded compensation number of the LEDs; The graded compensation numbers are arranged in descending order to generate an LED compensation sequence.

7. The dimming method of the multifunctional mining lamp according to claim 1, characterized in that: The step of adjusting the driving current value and the PWM duty cycle of the LED in stages according to the LED compensation sequence, and correcting the compensation parameters based on the adjusted illumination data to complete the dynamic compensation control includes: Divide the LEDs in the LED compensation sequence into three compensation levels of large, medium and small according to the size of the compensation parameters, and set the drive current adjustment step and the PWM duty cycle adjustment step for each level of compensation parameters to generate first hierarchical adjustment parameters; According to the first graded adjustment parameters, the driving current value of each LED is first adjusted, and then the PWM duty cycle is adjusted, and the compensated illumination data after each adjustment is obtained to obtain the compensation response curve of the LED; Performing fluctuation analysis on the compensation response curve, calculating the deviation value of the compensated illumination data before and after adjustment, and taking the ratio of the deviation value to the compensation parameter as the compensation effect coefficient; Based on the compensation effect coefficient, the adjustment step length of the first hierarchical adjustment parameter is corrected to obtain a second hierarchical adjustment parameter; The second graded adjustment parameters are re-compensated and adjusted according to the LED compensation sequence, and the compensation parameters are dynamically corrected to complete the dynamic compensation control.

8. The dimming method of the multifunctional mining lamp according to claim 7, characterized in that: The LEDs in the LED compensation sequence are divided into three compensation levels of large, medium and small according to the size of the compensation parameters, and a driving current adjustment step and a PWM duty cycle adjustment step are set for the compensation parameters of each level to generate the first hierarchical adjustment parameters, including: Perform temperature characteristic analysis on each LED in the LED compensation sequence, associate the compensation parameters of the LED with the corresponding LED junction temperature variation, and obtain the temperature sensitivity coefficient of the LED; Rearranging the LED compensation sequence based on the temperature sensitivity coefficient, classifying the LEDs whose temperature sensitivity coefficient difference is less than a second preset threshold into the same subsequence, and generating a temperature grouping sequence; The LEDs in the temperature grouping sequence are sorted according to the size of the compensation parameters, and the compensation parameters are divided into three levels of threshold ranges of large, medium and small according to the thermal accumulation effect of the LEDs to obtain a grading threshold; The LEDs are graded according to the grading threshold, and the drive current adjustment step of each grade is calculated based on the temperature sensitivity coefficient of the LED, and the PWM duty cycle adjustment step of each grade is calculated based on the response time of the LED to generate a step matrix; The step length matrix is ​​mapped and combined with the level information of the LED to generate a first grading adjustment parameter.

9. A multifunctional dimming device for mining lamps, characterized in that: The dimming device of the multifunctional mining lamp adopts the dimming method of the multifunctional mining lamp according to any one of claims 1 to 8, and the dimming device of the multifunctional mining lamp comprises: The panoramic distribution map acquisition module is used to obtain the original light data of each LED by lighting up the LEDs in sequence, and generate a panoramic light distribution map in combination with the spatial position information of the LEDs, and record the initial driving current value and initial PWM duty cycle of each LED; A light spot feature extraction module is used to perform polar coordinate system conversion and partition extraction on the light data in the panoramic light distribution map, obtain the deformation characteristics and brightness fluctuation characteristics of each LED light spot, and calculate the light transition continuity parameters according to the overlapping area of ​​adjacent LED light spots to generate light spot feature data; A partition clustering module, used to calculate the influence weight value of the LED according to the deformation characteristics, brightness fluctuation characteristics and time-series change law of the light transition continuity parameter in the light spot feature data, and partition and cluster the LED based on the influence weight value to obtain differentiated compensation partitions; A compensation sequence generation module, configured to calculate compensation parameters according to an initial driving current value and an initial PWM duty cycle of each LED in the differentiated compensation partition, and prioritize the LEDs based on the compensation parameters to generate an LED compensation sequence; The dynamic compensation control module is used to grade the driving current value and PWM duty cycle of the LED according to the LED compensation sequence, and calibrate the compensation parameters based on the adjusted illumination data to complete the dynamic compensation control.

10. A multifunctional dimming device for mining lamps, characterized in that: The dimming device of the multifunctional mining lamp comprises: a memory and at least one processor, wherein the memory stores instructions; The at least one processor calls the instruction in the memory to enable the dimming device of the multifunctional mining lamp to execute the steps of the dimming method of the multifunctional mining lamp as described in any one of claims 1-8.

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