Omnidirectional optical half-wave oscillator design method and system

Abstract

The invention discloses an omni-directional optical half-wave oscillator design method and system, and the method comprises the steps: arranging a plurality of light-emitting units in a rotationally symmetrical geometric layout based on the symmetry and continuity requirements of light spots, and determining the minimum number of units through restraining the maximum azimuth angle interval between adjacent units not to exceed a preset threshold value, thereby enabling the superposed light spots to approach a circle; a light spot uniformity quantitative evaluation mechanism is introduced, a dynamic evaluation index is generated by calculating the ratio of the light spot area to the perimeter, and the unit number and the arrangement mode are optimized in real time; light spot distribution curves under different arrangements are simulated in combination with the divergence characteristics of the light emitting units, parameters are adjusted through iteration until evaluation indexes reach a preset range, and the optimal radiation array configuration is determined. The problem of strict alignment in traditional optical communication is solved, multi-terminal parallel receiving is supported, and the system has remarkable advantages in the aspects of providing uniform illumination, improving mobile communication stability, ensuring electromagnetic compatibility, achieving energy feeding and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of lighting and wireless optical communication, and in particular to a design method and system of an omnidirectional optical half-wave oscillator. Background Art

[0002] Wireless optical communication has attracted much attention due to its high data transmission rate and low transmission delay, but the high directivity of optical signals makes the alignment problem a major obstacle in practical applications. To overcome this problem, a variety of auxiliary alignment technologies have been proposed and applied, such as automatic alignment using cameras and optoelectronic components (such as PIN diodes). These technologies determine the relative position between the moving target and the fixed base station through communication, and then deduce the actual position of the target. However, these auxiliary alignment schemes have obvious limitations: first, when the target moves fast and the response time of the pan-tilt adjustment is limited, the real-time and accuracy of the alignment will be affected; second, the traditional point-to-point communication method is difficult to meet the needs of multiple users accessing at the same time, and it is also impossible to achieve the effective integration of lighting and communication functions. At present, there is no simple and easy-to-implement solution that can simultaneously achieve alignment, multi-user support and lighting communication integration.

[0003] It should be noted that the information disclosed in the above background technology section is only used for understanding the background of the present application, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the invention

[0004] The main purpose of the present invention is to provide an omnidirectional optical half-wave oscillator design method and system to overcome the problems of strict alignment requirements, uneven lighting, inability to support multiple users, complex equipment system structure and high cost of use in wireless optical communications in the prior art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A method for designing an omnidirectional optical half-wave oscillator comprises the following steps: S1. Omnidirectional optical radiation array design: Based on the symmetry and continuity requirements of the target light spot, multiple light-emitting units are arranged in a rotationally symmetrical geometric layout, and the minimum number of light-emitting units is determined by constraining the maximum azimuth angle interval between adjacent light-emitting units not to exceed a preset threshold, so that the envelope of the superimposed light spot approaches a circle; S2. Quantitative evaluation of light spot uniformity: by calculating the ratio of the area to the perimeter of the light spot shape, a quantitative evaluation index is generated to dynamically characterize the degree of proximity of the light spot to the ideal circle, and the number and arrangement of light-emitting units are optimized according to the evaluation index; S3. Optical radiation parameter verification: Based on the divergence characteristics of the light-emitting unit, simulate the spot distribution curve under different arrangement numbers, and iteratively adjust the number and layout of the light-emitting units until the quantitative evaluation index reaches the preset optimization range to determine the final omnidirectional radiation array configuration.

[0006] Furthermore, in step S1, the rotationally symmetric geometric layout is achieved by: Based on the radiation divergence angle of each light-emitting unit, a Lambertian radiation model is established in which the luminous intensity decays with the emission angle, and the minimum number of light-emitting units is determined by constraining the azimuth angle interval between adjacent light-emitting units to not exceed half of the radiation divergence angle.

[0007] Furthermore, in step S2, the generation of the quantitative evaluation index specifically includes: For the superimposed light spot envelope, the sum of the irradiances of each light-emitting unit at the target measurement point is calculated, where the irradiance of a single light-emitting unit is determined by the emission angle attenuation function and the inverse square relationship of the distance in its Lambertian radiation model, and the optimization direction of the light spot shape is dynamically characterized by the ratio of the area to the perimeter.

[0008] Furthermore, in step S3, the optical radiation parameter verification specifically includes: According to the Lambertian radiation model, the irradiance distribution curve of the light spot under different numbers of light-emitting units is simulated, and the quantitative evaluation index is made close to the preset threshold by iteratively adjusting the number and azimuth interval, and finally the symmetrical layout parameters of the omnidirectional radiation array are obtained.

[0009] Furthermore, in step S1, the rotationally symmetric geometric layout is achieved by: The light-emitting units are arranged in a regular polygonal geometric structure, and the radii of the inscribed circle and the circumscribed circle of the light spot envelope are made close by adjusting the number of light-emitting units, thereby improving the circularity of the light spot; The minimum number of light-emitting units is determined by the following constraints: (a) The light-emitting unit array must satisfy rotational symmetry distribution to eliminate the unevenness of the light spot shape; (b) The azimuth angle interval between adjacent light-emitting units must be smaller than the characteristic threshold corresponding to the radiation divergence angle of the light-emitting unit to avoid the discretization effect of the light spot envelope.

[0010] In step S3, the optical radiation parameter verification further includes: According to the relationship between the regular polygonal geometric structure and the radius of the light spot envelope, the number of light-emitting units is dynamically optimized so that the irradiance distribution curve of the light spot gradually approaches the ideal circle.

[0011] Furthermore, in step S2, the calculation of the quantitative evaluation index specifically includes: Generate a normalized roundness value based on the ratio of the area of ​​the light spot envelope to the square of the perimeter, and determine the optimization direction of the light spot shape by dynamically comparing the roundness value with a preset ideal threshold; The closer the roundness value is to 1, the closer the light spot envelope is to an ideal circle, and the roundness value shows a nonlinear growth trend with the increase in the number of light-emitting units.

[0012] Furthermore, in step S1, the determination of the minimum number of light-emitting units further includes: According to the radiation divergence angle characteristics of the light-emitting unit, the light spot roundness change curve under different arrangement numbers is simulated, and the number of light-emitting units corresponding to the significant decrease in the roundness value growth rate is selected as the optimal configuration; The critical point at which the roundness value growth rate significantly decreases is dynamically calibrated by analyzing the correlation between the spot symmetry and the arrangement quantity.

[0013] Furthermore, in step S3, the simulation verification specifically includes: According to the characteristics of different radiation divergence angles, a mapping relationship model between the spot roundness and the number of light-emitting units is established, and the roundness value is made to reach a preset optimization range by iteratively adjusting the number of light-emitting units and the arrangement azimuth angle interval; Among them, in the mapping relationship model, the circularity of the light spot shows a change rule that it first rises rapidly and then tends to saturation as the number of light-emitting units increases, and the optimization interval is determined according to the starting point of the saturation area.

[0014] Further, when the preset half-power divergence angle of the light-emitting unit is 60 degrees, the light-emitting unit array is composed of at least twelve light-emitting units, arranged in a regular polygonal geometric structure with a number of sides equal to the number of light-emitting units, and the azimuth interval between adjacent light-emitting units is less than or equal to 30 degrees. When the preset half-power divergence angle of the light-emitting unit is 180 degrees, the light-emitting unit array is composed of at least six light-emitting units, arranged in a regular polygonal geometric structure with a number of sides equal to the number of light-emitting units, and the azimuth interval between adjacent light-emitting units is less than or equal to 60 degrees.

[0015] Furthermore, the light emitting unit is an LED.

[0016] An omnidirectional optical half-wave oscillator system includes a light-emitting unit array module, wherein the light-emitting unit array module is formed by a plurality of light-emitting units being evenly arranged in a circular array, and the geometric layout thereof is dynamically configured into one of the following two modes according to a preset half-power divergence angle: When the preset half-power divergence angle of the light-emitting unit is 60 degrees, the light-emitting unit array is composed of at least twelve light-emitting units, arranged in a regular polygonal geometric structure with a number of sides equal to the number of light-emitting units, and the azimuth interval between adjacent light-emitting units is less than or equal to 30 degrees; When the preset half-power divergence angle of the light-emitting unit is 180 degrees, the light-emitting unit array is composed of at least six light-emitting units, arranged in a regular polygonal geometric structure with a number of sides equal to the number of light-emitting units, and the azimuth angle interval between adjacent light-emitting units is less than or equal to 60 degrees.

[0017] Furthermore, the light emitting unit is an LED.

[0018] The present invention has the following beneficial effects: The present invention proposes an omnidirectional optical half-wave oscillator design method and system, which are applied to wireless optical communication. Through the rotationally symmetric LED array layout and optimized spot uniformity control technology, the alignment problem caused by the high directivity of traditional optical signals is effectively solved, and the communication stability and transmission efficiency in mobile scenarios are significantly improved. The system uses pulse modulation signals in the visible light band to transmit information, achieving high-speed communication while ensuring the lighting quality, and converts the energy in the received signal into power supply for the terminal equipment through the energy recovery function, which significantly improves energy efficiency and reduces dependence on traditional power supply methods. The omnidirectional radiation design not only supports multi-terminal parallel reception and enhances the system's concurrent communication capabilities, but also has excellent anti-interference performance, can resist local occlusion and angle deviation in complex environments, and ensure stable communication quality. In addition, the solution maintains the electromagnetic compatibility of the system by avoiding the risk of electromagnetic radiation, and has both dynamic lighting performance and multi-functional integration characteristics. It is suitable for a variety of scenarios such as indoors, cities, and underwater, and provides an efficient, reliable and environmentally friendly communication and power supply integrated solution for smart terminals.

[0019] Specifically, the technical advantages of the present invention are mainly reflected in the following aspects: (1) Omnidirectional radiation can evenly distribute optical signals over a large area, eliminating the need for strict alignment between the transmitter and the receiver, ensuring effective signal reception even when the position of the user or device changes; (2) Omnidirectional light simulates uniform solar radiation, and because its flickering frequency is much higher than the human eye's perception range (e.g., above 1 kHz), the lighting and communication functions do not affect the lighting quality. Compared with traditional energy-saving lamps, it has superior dynamic lighting performance; (3) Since omnidirectional light can cover a wide area, the same light source can transmit signals in multiple directions at the same time, thereby supporting parallel reception by multiple terminal devices, greatly improving the system's concurrent communication capabilities and application flexibility; (4) It uses pulse modulation signals in the visible light band, which does not generate electromagnetic interference and is conducive to maintaining good electromagnetic compatibility. While achieving communication and lighting, it effectively feeds power to various terminal devices by extracting energy from the received signal, thereby replacing the inconvenience caused by traditional wired or battery power supply, reducing the size and cost of terminal devices, and greatly extending their standby time. (5) The omnidirectional radiation design can effectively resist local occlusion, angle deviation and environmental interference, thereby enhancing the overall stability and reliability of the system, and is particularly suitable for use in dynamic or complex environments.

[0020] (6) Indoors, in cities, underwater or other environments, since the receiver may be at various angles, omnidirectional transmission can ensure that no matter how the receiver is placed, it can receive a signal of sufficient strength, ensuring that the communication quality does not fluctuate significantly due to environmental changes.

[0021] Other beneficial effects of the embodiments of the present invention will be further described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figures 1A to 1C Schematic diagram of the light intensity cross-sectional distribution curve for different LED arrangement numbers n.

[0023] Figure 2 It is a schematic diagram of the geometric relationship between the LED and the measuring point in the present invention; Figure 3 A schematic diagram of the positional relationship between the arrangement of multiple LEDs and the measurement points in the present invention; Figure 4 for Figure 3 The light intensity distribution diagram produced by the LED arrangement on the hemispherical surface shown; Figure 5 This is the cross-sectional light intensity roundness curve for different LED arrangement numbers.

[0024] Figure 6 The figure is a flow chart of a method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] See also Figure 6 The embodiment of the present invention provides an omnidirectional optical half-wave oscillator design method, comprising the following steps: Step S1. Omnidirectional optical radiation array design: Based on the symmetry and continuity requirements of the target light spot, multiple light-emitting units (such as light-emitting diodes (LEDs)) are arranged in a rotationally symmetrical geometric layout, and the minimum number of light-emitting units is determined by constraining the maximum azimuth angle interval between adjacent light-emitting units not to exceed a preset threshold, so that the envelope of the superimposed light spot approaches a circle; Step S2. Quantitative evaluation of light spot uniformity: by calculating the ratio of the area to the perimeter of the light spot shape, a quantitative evaluation index is generated to dynamically characterize the degree of proximity of the light spot to the ideal circle, and the number and arrangement of light-emitting units are optimized according to the evaluation index; Step S3. Optical radiation parameter verification: Based on the divergence characteristics of the light-emitting units, the spot distribution curves under different arrangement numbers are simulated, and the number and layout of the light-emitting units are iteratively adjusted until the quantitative evaluation index reaches the preset optimization range, thereby determining the final omnidirectional radiation array configuration.

[0028] In some embodiments, in step S1, the rotationally symmetric geometric layout is achieved in the following manner: based on the radiation divergence angle of each light-emitting unit, a Lambertian radiation model in which the luminous intensity decays with the output angle is established, and the minimum number of light-emitting units is determined by constraining the azimuthal angle interval between adjacent light-emitting units to not exceed half of the radiation divergence angle.

[0029] In some embodiments, in step S2, the generation of the quantitative evaluation index specifically includes: calculating the sum of the irradiances of each light-emitting unit at the target measurement point for the superimposed light spot envelope, wherein the irradiance of a single light-emitting unit is determined by the emission angle attenuation function and the inverse square relationship of the distance in its Lambertian radiation model, and dynamically characterizing the optimization direction of the light spot shape by the ratio of the area to the perimeter.

[0030] In some embodiments, in step S3, the optical radiation parameter verification specifically includes: according to the Lambertian radiation model, simulating the irradiance distribution curve of the light spot under different numbers of light-emitting units, and iteratively adjusting the number and azimuth interval so that the quantitative evaluation index approaches a preset threshold, and finally obtaining the symmetrical layout parameters of the omnidirectional radiation array.

[0031] In some embodiments, in step S1, the rotationally symmetric geometric layout is achieved by arranging the light-emitting units in a regular polygonal geometric structure, and adjusting the number of light-emitting units so that the radii of the inscribed circle and the circumscribed circle of the light spot envelope are close to each other, thereby improving the circularity of the light spot; wherein the minimum number of light-emitting units is determined by the following constraints: (a) the light-emitting unit array must satisfy the rotationally symmetric distribution to eliminate the unevenness of the light spot shape; (b) the azimuthal angle interval between adjacent light-emitting units must be less than the characteristic threshold corresponding to the radiation divergence angle of the light-emitting unit to avoid the discretization effect of the light spot envelope.

[0032] In some embodiments, in step S3, the optical radiation parameter verification further includes: dynamically optimizing the number of light-emitting units according to the relationship between the regular polygonal geometric structure and the radius of the light spot envelope, so that the irradiance distribution curve of the light spot gradually approaches an ideal circle.

[0033] In some embodiments, in step S2, the calculation of the quantitative evaluation index specifically includes: generating a normalized roundness value based on the ratio of the area of ​​the light spot envelope to the square of the circumference, and judging the optimization direction of the light spot shape by dynamically comparing the roundness value with a preset ideal threshold; wherein, the closer the roundness value is to 1, the closer the light spot envelope is to an ideal circle, and the roundness value shows a nonlinear growth trend with the increase in the number of light-emitting units.

[0034] In some embodiments, in step S1, the determination of the minimum number of light-emitting units further includes: based on the radiation divergence angle characteristics of the light-emitting units, simulating the spot roundness change curve under different arrangement numbers, and selecting the corresponding number of light-emitting units when the roundness value growth rate drops significantly as the optimal configuration; wherein the critical point where the roundness value growth rate drops significantly is dynamically calibrated by analyzing the correlation between the spot symmetry and the arrangement number.

[0035] In some embodiments, in step S3, the simulation verification specifically includes: establishing a mapping relationship model between the circularity of the light spot and the number of light-emitting units for different radiation divergence angle characteristics, and iteratively adjusting the number of light-emitting units and the arrangement azimuth intervals so that the roundness value reaches a preset optimization range; wherein, in the mapping relationship model, the circularity of the light spot shows a change pattern of first rapidly rising and then tending to saturation with the increase in the number of light-emitting units, and the optimization range is determined according to the starting point of the saturation area.

[0036] In some embodiments, when the preset half-power divergence angle of the light-emitting unit is 60 degrees, the light-emitting unit array is composed of at least twelve light-emitting units, arranged in a regular polygon geometric structure with the number of sides equal to the number of light-emitting units, and the azimuth angle interval between adjacent light-emitting units is less than or equal to 30 degrees. In other embodiments, when the preset half-power divergence angle of the light-emitting unit is 180 degrees, the light-emitting unit array is composed of at least six light-emitting units, arranged in a regular polygon geometric structure with the number of sides equal to the number of light-emitting units, and the azimuth angle interval between adjacent light-emitting units is less than or equal to 60 degrees.

[0037] An embodiment of the present invention further provides an omnidirectional optical half-wave dipole system, including a light-emitting unit array module, which is formed by uniformly arranging a plurality of light-emitting units (such as LEDs) in a circular array, and its geometric layout is dynamically configured into one of the following two modes according to the preset half-power divergence angle: When the preset half-power divergence angle of the light-emitting unit is 60 degrees, the light-emitting unit array is composed of at least twelve light-emitting units, arranged in a regular polygon geometric structure with the number of sides equal to the number of light-emitting units, and the azimuth angle interval between adjacent light-emitting units is less than or equal to 30 degrees; When the preset half-power divergence angle of the light-emitting unit is 180 degrees, the light-emitting unit array is composed of at least six light-emitting units, arranged in a regular polygon geometric structure with the number of sides equal to the number of light-emitting units, and the azimuth angle interval between adjacent light-emitting units is less than or equal to 60 degrees.

[0038] The following further describes specific embodiments of the present invention, its algorithm examples and experimental verification.

[0039] An omnidirectional optical half-wave dipole method and system specifically include the following steps: (1) Emission model of a single LED The emission intensity of a single LED generally follows the Lambert model, and its emission intensity distribution can be expressed as:

[0040] where is the angle between the emitted light ray and the normal of the LED, is the emission intensity in the normal direction. The constant m is the order of the Lambert source, which is determined by the divergence angle of the LED:

[0041] where is the half-power full-width divergence angle of the LED, then formula (1) can be expressed as:

[0042] (2) Irradiance of the LED at the measurement point Since LED is a Lambertian light source, its luminous intensity varies only with the polar angle. Related to the azimuth The light intensity is inversely proportional to the square of the distance, that is, . Therefore, at point Measured light intensity It can be expressed as:

[0043] (3) Calculation of irradiance of multiple LEDs at the measurement point when n The same LEDs work together at a point in space When , the total light intensity is the linear superposition of the individual contributions of each LED. The total light intensity at can be expressed as:

[0044] in For the number i The light intensity formed by the LED chip at this point.

[0045] (4) Design of omnidirectional optical half-wave oscillator Under the Lambertian light source model, if all LEDs are arranged in the same position and direction, then n At what value, the shape of the light spot after superposition is exactly the same as the shape of the light spot of a single LED, only the intensity is enhanced. At this time, the circularity of the light spot is determined by the divergence angle of a single LED. Decide, with n Not relevant.

[0046] However, when LEDs are arranged in a circular array or other symmetrical pattern, increasing n The symmetry of the light spot can be improved. At this time, the light spot is close to a circle, and a more ideal light spot shape can be obtained by optimizing the LED arrangement.

[0047] Conditions for optimal spot symmetry In order to obtain a light spot that is closest to an ideal circle, the LED arrangement should meet the following two conditions: 1. Symmetry requirements: The geometric distribution of the LED array needs to satisfy rotational symmetry to reduce the unevenness of the light spot shape.

[0048] 2. Minimum spacing constraint: The spacing between LEDs should be smaller than the characteristic size of the light spot to avoid discretization effects and thus improve the continuity of the light spot envelope.

[0049] When the above conditions are met, the optimal number of LEDs is It can be expressed as:

[0050] in is the minimum azimuth spacing between LEDs, which must satisfy . n The value of should take into account the LED divergence angle , to optimize optical uniformity.

[0051] LED arrangement geometry have n When the LEDs are arranged in a straight n When it is a polygon, the envelope of the spot is closest to a circle, and the radius of the inscribed circle r The radius of its circumscribed circle (omnidirectional light envelope) R The relationship is approximately:

[0052] when n As it gradually increases to infinity, the regular polygon gradually approaches a circle. At this time, the radius of the inscribed circle is r The radius of the circumcircle R equal, that is, the envelope of the optical radiation is a perfect circle.

[0053] (5) Omnidirectional light spot shape evaluation criteria In practical applications, due to the number of LEDs arranged n It is impossible to approach infinity, and the generated optical radiation still has deviations, so it is necessary to quantify the shape of the light spot. Usually, roundness is used to measure the degree of closeness of the light spot to the ideal circle, and its definition is as follows:

[0054] in is the spot shape area, P is the spot envelope circumference, the closer the roundness is to 1, the closer the spot is to the ideal circle. n As it increases, the roundness of the light spot gradually increases, approaching the ideal circle.

[0055] (6) Calculation Assume LED half-power divergence angle ,but

[0056] That is, when the LEDs are arranged in a regular dodecagon, the light spot is closest to a circle.

[0057] Examples The geometric relationship diagram of the LED chip and the measurement point is as follows Figure 2As shown, LED is an incoherent light source, and the intensity of the light emitted by multiple LED chips can be directly added after superposition. The light emission of a single LED chip conforms to the model of Lambertian light source, and its luminous intensity distribution can be expressed as:

[0058] in is the angle between the outgoing light and the normal of the LED chip, is the luminous intensity in the normal direction. The constant m is the order of the Lambertian light source, which is determined by the divergence angle of the LED chip:

[0059] in It is the half-power full-width divergence angle of the LED chip.

[0060] The relationship between the multiple LED arrangement and the measurement point is as follows: Figure 3 As shown, this figure is only used as an example. When calculating the light intensity distribution of different LED chip arrangements, different geometric relationships should be used for calculation. Figure 3 In, at point Measured light intensity The superposition of light emitted by 9 LED chips:

[0061] in is the light intensity generated by the LED chip numbered n at this point. Since the radiation distribution characteristics of the Lambertian light source are rotationally symmetrical, the light intensity and angle Not relevant, that is:

[0062] According to the geometric relationship,

[0063] in i and j It is the serial number of the LED chip in the high-power LED package, indicating that the LED chip is located in the package. i Line j List. and Respectively represent the position of the LED chip relative to the central LED chip, , , unit is millimeters.

[0064] Substituting formula (4) and (5) into (3), we can get The light intensity is:

[0065] According to formula (6), the normalized light intensity distribution of the LED chipset on the unit sphere can be calculated as follows: Figure 4 The light intensity distribution of the LED package is still similar to the Lambertian light source law as a whole, but because the LED chips are arranged in a rectangular shape, the distribution of light intensity at certain positions shows rectangular characteristics, which is somewhat different from the ideal circle.

[0066] When there are n LEDs, in order to obtain a light spot shape that is closest to an ideal circle, the LED arrangement should meet the following two conditions: 1. Symmetry requirements: The geometric distribution of the LED array needs to satisfy rotational symmetry to ensure uniform radiation distribution.

[0067] 2. Minimum spacing constraint: The spacing between LEDs should be smaller than the characteristic size of the light spot to avoid discretization effects and thus improve the continuity of the light spot envelope.

[0068] When the above conditions are met, the optimal number of LEDs is It can be expressed as:

[0069] in is the minimum azimuth spacing between LEDs, which must satisfy . n The value of should take into account the LED divergence angle , to optimize optical uniformity.

[0070] When LEDs are arranged in a circular array or other symmetrical manner, increasing n It can improve the symmetry of the light spot. In practical applications, due to the number of LEDs arranged n It is impossible to approach infinity, and the generated optical radiation still has deviations, so it is necessary to quantify the shape of the light spot. Usually, roundness is used to measure the degree of closeness of the light spot to the ideal circle, and its definition is as follows:

[0071] in is the spot shape area, P is the spot envelope circumference, the closer the roundness is to 1, the closer the spot is to the ideal circle. n As it increases, the roundness of the light spot gradually increases, approaching the ideal circle.

[0072] According to the above calculation method, the half-power divergence angle is used The LEDs are simulated to simulate the light intensity cross-sectional distribution curve and the roundness of the curve under different LED arrangement numbers n. The LED position is located at the midpoint of each side of the regular polygon. Figures 1A to 1CAs shown in the figure, the distribution of the light intensity of the cross section is obtained when n=1~6. It can be found that when n gradually increases, the roundness of the light intensity distribution of the cross section gradually increases.

[0073] like Figure 5 As shown in the figure, the roundness curve of the cut surface light intensity with different LED arrangement numbers n is analyzed. When n increases from 3 to 6, the roundness of the cut surface light intensity increases very rapidly. When n=6, its roundness is 0.9851, which is very close to the ideal circle. When n increases from 7 to 12, the curve tends to be flat. At this time, increasing the number of LED arrangements has little effect on the increase of roundness. Therefore, it can be concluded that at the half-power divergence angle In this case, considering the symmetry and shape of the light spot, n=6 is the approximate optimal LED arrangement number.

[0074] In summary, the present invention proposes an omnidirectional optical half-wave oscillator design method and system, which effectively overcomes the problems of strict alignment requirements, uneven lighting, inability to support multiple users, complex equipment system structure and high cost of use in wireless optical communications in the prior art. The embodiments of the present invention can achieve optical radiation characteristics similar to those of a half-wave oscillator through different numbers of light emitting diode (LED) modules and base units of different shapes. The present invention can not only simulate the uniform lighting effect of the sun, but also effectively solve the problem of traditional alignment difficulties in wireless optical communications, thereby significantly improving the communication stability and transmission efficiency in mobile scenarios.

[0075] Specifically, the system uses pulse modulation signals in the visible light band to transmit information. Because its frequency is much higher than the human eye's perception range (for example, above 1 kHz), it can achieve communication functions without causing any interference to the lighting quality. In addition, since the modulation signal does not generate electromagnetic radiation, it helps maintain the excellent electromagnetic compatibility of the system and avoids the risk of electromagnetic pollution that may be caused by traditional radio frequency communications.

[0076] Furthermore, the present invention also has an energy recovery function, that is, in the process of realizing lighting and communication, by effectively extracting energy from the received signal, it can provide power support to various terminal devices. This feature not only improves the overall energy efficiency of the system, but also expands the application prospects of wireless optical communication in power supply for smart terminals.

[0077] The omnidirectional optical half-wave oscillator method and system of the present invention have significant advantages in providing uniform lighting, improving mobile communication stability, ensuring electromagnetic compatibility, and realizing energy feeding. Compared with traditional lighting products such as energy-saving lamps, its dynamic lighting performance and multi-functional integration are more outstanding.

[0078] The technical advantages of the present invention are mainly reflected in: (1) Omnidirectional radiation can evenly distribute optical signals over a large area, eliminating the need for strict alignment between the transmitter and the receiver, ensuring effective signal reception even when the position of the user or device changes; (2) Omnidirectional light simulates uniform solar radiation, and because its flickering frequency is much higher than the human eye's perception range (e.g., above 1 kHz), the lighting and communication functions do not affect the lighting quality. Compared with traditional energy-saving lamps, it has superior dynamic lighting performance; (3) Since omnidirectional light can cover a wide area, the same light source can transmit signals in multiple directions at the same time, thereby supporting parallel reception by multiple terminal devices, greatly improving the system's concurrent communication capabilities and application flexibility; (4) It uses pulse modulation signals in the visible light band, which does not generate electromagnetic interference and is conducive to maintaining good electromagnetic compatibility. While achieving communication and lighting, it effectively feeds power to various terminal devices by extracting energy from the received signal, thereby replacing the inconvenience caused by traditional wired or battery power supply, reducing the size and cost of terminal devices, and greatly extending their standby time. (5) The omnidirectional radiation design can effectively resist local occlusion, angle deviation and environmental interference, thereby enhancing the overall stability and reliability of the system, and is particularly suitable for use in dynamic or complex environments.

[0079] (6) Indoors, in cities, underwater or other environments, since the receiver may be at various angles, omnidirectional transmission can ensure that no matter how the receiver is placed, it can receive a signal of sufficient strength, ensuring that the communication quality does not fluctuate significantly due to environmental changes.

[0080] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, without departing from the concept of the present invention, it can also make several substitutions or modifications to these described embodiments, and these substitutions or modifications should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the absence of mutual contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

Claims

1. A method for designing an omnidirectional optical half-wave oscillator, characterized in that: The following steps are involved: S1. Omnidirectional optical radiation array design: Based on the symmetry and continuity requirements of the target light spot, multiple light-emitting units are arranged in a rotationally symmetrical geometric layout, and the minimum number of light-emitting units is determined by constraining the maximum azimuth angle interval between adjacent light-emitting units not to exceed a preset threshold, so that the envelope of the superimposed light spot approaches a circle; S2. Quantitative evaluation of light spot uniformity: by calculating the ratio of the area to the perimeter of the light spot shape, a quantitative evaluation index is generated to dynamically characterize the degree of proximity of the light spot to the ideal circle, and the number and arrangement of light-emitting units are optimized according to the evaluation index; S3. Optical radiation parameter verification: Based on the divergence characteristics of the light-emitting unit, simulate the spot distribution curve under different arrangement numbers, and iteratively adjust the number and layout of the light-emitting units until the quantitative evaluation index reaches the preset optimization range to determine the final omnidirectional radiation array configuration.

2. The omnidirectional optical half-wave oscillator design method according to claim 1, characterized in that: In step S1, the rotationally symmetric geometric layout is achieved by: Based on the radiation divergence angle of each light-emitting unit, a Lambertian radiation model is established in which the luminous intensity decays with the emission angle, and the minimum number of light-emitting units is determined by constraining the azimuth angle interval between adjacent light-emitting units to not exceed half of the radiation divergence angle; In step S2, the generation of the quantitative evaluation index specifically includes: For the superimposed light spot envelope, the sum of the irradiances of each light-emitting unit at the target measurement point is calculated, wherein the irradiance of a single light-emitting unit is determined by the emission angle attenuation function and the inverse square relationship of the distance in its Lambertian radiation model, and the optimization direction of the light spot shape is dynamically characterized by the ratio of the area to the perimeter; In step S3, the optical radiation parameter verification specifically includes: According to the Lambertian radiation model, the irradiance distribution curve of the light spot under different numbers of light-emitting units is simulated, and the quantitative evaluation index is made close to the preset threshold by iteratively adjusting the number and azimuth interval, and finally the symmetrical layout parameters of the omnidirectional radiation array are obtained.

3. The omnidirectional optical half-wave oscillator design method according to claim 1, characterized in that: In step S1, the rotationally symmetric geometric layout is achieved by: The light-emitting units are arranged in a regular polygonal geometric structure, and the radii of the inscribed circle and the circumscribed circle of the light spot envelope are made close by adjusting the number of light-emitting units, thereby improving the circularity of the light spot; The minimum number of light-emitting units is determined by the following constraints: (a) The light-emitting unit array must satisfy rotational symmetry distribution to eliminate the unevenness of the light spot shape; (b) The azimuth angle interval between adjacent light-emitting units must be smaller than the characteristic threshold corresponding to the radiation divergence angle of the light-emitting unit to avoid the discretization effect of the light spot envelope; In step S3, the optical radiation parameter verification specifically includes: According to the relationship between the regular polygonal geometric structure and the radius of the light spot envelope, the number of light-emitting units is dynamically optimized so that the irradiance distribution curve of the light spot gradually approaches the ideal circle.

4. The omnidirectional optical half-wave oscillator design method according to claim 2, characterized in that: In step S2, the calculation of the quantitative evaluation index specifically includes: Generate a normalized roundness value based on the ratio of the area of ​​the light spot envelope to the square of the perimeter, and determine the optimization direction of the light spot shape by dynamically comparing the roundness value with a preset ideal threshold; The closer the roundness value is to 1, the closer the light spot envelope is to an ideal circle, and the roundness value shows a nonlinear growth trend with the increase in the number of light-emitting units.

5. The omnidirectional optical half-wave oscillator design method according to claim 1, characterized in that: In step S1, the determination of the minimum number of light-emitting units specifically includes: According to the radiation divergence angle characteristics of the light-emitting unit, the light spot roundness change curve under different arrangement numbers is simulated, and the number of light-emitting units corresponding to the significant decrease in the roundness value growth rate is selected as the optimal configuration; The critical point at which the roundness value growth rate significantly decreases is dynamically calibrated by analyzing the correlation between the spot symmetry and the arrangement quantity.

6. The omnidirectional optical half-wave oscillator design method according to claim 5, characterized in that: In step S3, the simulation verification specifically includes: According to the characteristics of different radiation divergence angles, a mapping relationship model between the spot roundness and the number of light-emitting units is established, and the roundness value is made to reach a preset optimization range by iteratively adjusting the number of light-emitting units and the arrangement azimuth angle interval; Among them, in the mapping relationship model, the circularity of the light spot shows a change rule that it first rises rapidly and then tends to saturation as the number of light-emitting units increases, and the optimization interval is determined according to the starting point of the saturation area.

7. The omnidirectional optical half-wave oscillator design method according to claim 1, characterized in that: When the preset half-power divergence angle of the light-emitting unit is 60 degrees, the light-emitting unit array is composed of at least twelve light-emitting units, arranged in a regular polygonal geometric structure with a number of sides equal to the number of light-emitting units, and the azimuth interval between adjacent light-emitting units is less than or equal to 30 degrees; When the preset half-power divergence angle of the light-emitting unit is 180 degrees, the light-emitting unit array is composed of at least six light-emitting units, arranged in a regular polygonal geometric structure with a number of sides equal to the number of light-emitting units, and the azimuth angle interval between adjacent light-emitting units is less than or equal to 60 degrees.

8. The method for designing an omnidirectional optical half-wave oscillator according to any one of claims 1 to 7, characterized in that: The light emitting unit is an LED.

9. An omnidirectional optical half-wave oscillator system, characterized in that: The light emitting unit array module includes a plurality of light emitting units evenly arranged in a circular array, and the geometric layout thereof is dynamically configured into one of the following two modes according to a preset half-power divergence angle: When the preset half-power divergence angle of the light-emitting unit is 60 degrees, the light-emitting unit array is composed of at least twelve light-emitting units, arranged in a regular polygonal geometric structure with a number of sides equal to the number of light-emitting units, and the azimuth interval between adjacent light-emitting units is less than or equal to 30 degrees; When the preset half-power divergence angle of the light-emitting unit is 180 degrees, the light-emitting unit array is composed of at least six light-emitting units, arranged in a regular polygonal geometric structure with a number of sides equal to the number of light-emitting units, and the azimuth angle interval between adjacent light-emitting units is less than or equal to 60 degrees.

10. The omnidirectional optical half-wave oscillator system according to claim 9, characterized in that: The light emitting unit is an LED.

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