A multi-band fusion industrial detection light source regulation method, system and medium

Abstract

The application provides a multi-band fusion industrial detection light source regulation method, system and medium, the method comprising: outputting a multi-band initial light source based on a quantum dot tuning wide spectrum emission mechanism; performing coordinated emission and time-sharing triggering on the multi-band initial light source based on a time sequence matrix to obtain a multi-band corresponding multi-path excitation light source; performing multi-band spectrum fusion and light mixing processing on the multi-band corresponding multi-path excitation light source based on an optical path transmission efficiency model to obtain a fusion light source; calculating a spectrum drift amount corresponding to a real-time temperature of a light source chip based on a spectrum drift function; calculating spectrum compensation information based on the spectrum drift amount, dynamically compensating the spectrum drift amount according to the spectrum compensation information, and performing spectrum drift dynamic correction; through multi-band light source fusion light mixing processing, and real-time analysis of the spectrum drift amount, spectrum dynamic correction is realized according to the thermal feedback of the real-time temperature of the light source chip, the emission center drift phenomenon caused by temperature drift is effectively eliminated, and the detection performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of light source control, in particular to a multi-waveband fusion industrial detection light source regulation method and system and a medium. BACKGROUND

[0002] In modern industrial nondestructive testing (NDT) systems, the development of light source technology has a direct impact on detection accuracy, material adaptability, detection speed, and cost control. Traditional industrial detection scenarios often use multiple independent waveband light source systems, such as ultraviolet light (UV, wavelength usually between 320-400 nm) for surface micro-crack detection, infrared light (IR, wavelength generally between 900-1500 nm) for thermal imaging analysis, visible light (VIS, wavelength between 400-700 nm) for structure characterization and surface reflection imaging, etc. This multi-waveband split system has obvious defects such as complex structure, high cost, difficult synchronization control, and frequent system maintenance.

[0003] Multi-waveband fusion detection technology is becoming a current research hotspot, and its core idea is to integrate multiple spectral bands of radiation into a unified emission system to achieve wide-spectrum excitation and multi-target imaging. Previous multi-waveband light source fusion technologies generally have the following technical bottlenecks:

[0004] Incomplete or discontinuous spectral coverage: existing LEDs and lasers are often limited to certain narrow waveband ranges, making it difficult to achieve continuous wide-spectrum output from UV to near-infrared.

[0005] High structural complexity: multi-waveband systems require the combination of multiple independent light-emitting modules, which guide different light sources through mirrors, filter wheels, and other mechanisms, resulting in a bloated optical system.

[0006] Slow system response: due to the physical independence of multiple light sources, it is difficult to quickly implement time-sharing excitation of different wavebands, which cannot meet the real-time requirements of dynamic detection.

[0007] High energy consumption and uneven light intensity: the superposition of multiple independent light sources significantly increases energy consumption, and the alignment of multiple waveband spots is difficult, affecting detection accuracy.

[0008] Therefore, there is an urgent need for a technical means that can achieve coordinated light emission of UV, VIS, and IR on a single device platform, with spectral adjustability, time-sharing controllability, and high-speed response, to meet the future needs of integration, high integration, and intelligentization of multi-type industrial detection. SUMMARY

[0009] The embodiment of the application aims to provide a multi-band fusion industrial detection light source regulation method, system and medium, which realizes light spectrum dynamic correction through multi-band light source fusion light mixing processing and real-time analysis of light spectrum drift, effectively eliminates the emission center drift phenomenon caused by temperature drift, and improves detection performance.

[0010] The embodiment of the application also provides a multi-band fusion industrial detection light source regulation method, which comprises the following steps:

[0011] Based on the quantum dot tuning wide spectrum emission mechanism, the light emitting chip array and the spectrum conversion type quantum dot coating are deployed to output a multi-band initial light source;

[0012] A timing matrix is constructed, and the multi-band initial light source is cooperatively emitted and time-division triggered based on the timing matrix to obtain a multi-band corresponding multi-path excitation light source;

[0013] A light path transmission efficiency model is constructed, and the multi-band corresponding multi-path excitation light source is subjected to multi-band spectrum fusion and light mixing processing based on the light path transmission efficiency model to obtain a fusion light source;

[0014] The real-time temperature of the light source chip is acquired, and the light spectrum drift corresponding to the real-time temperature of the light source chip is calculated based on a light spectrum drift function;

[0015] Spectrum compensation information is calculated based on the light spectrum drift, and the light spectrum drift is dynamically compensated according to the spectrum compensation information to perform light spectrum drift dynamic correction.

[0016] Optionally, in the multi-band fusion industrial detection light source regulation method described in the embodiment of the application, the spectrum fusion step is as follows:

[0017] The detection task corresponding band requirement vector is set:

[0018] ,

[0019] The time window scheduling function is set for each band , which satisfies:

[0020] .

[0021] The total light spectrum excitation matrix is defined as:

[0022] .

[0023] Optionally, in the multi-band fusion industrial detection light source regulation method described in the embodiment of the application, a timing matrix T is constructed, which is represented as:

[0024] ,

[0025] wherein: indicates the on-off control state of the i-th waveband in the j-th time slice, 1 indicates on, and 0 indicates off; m is the number of wavebands; and n is the total number of time slices.

[0026] Optionally, in the multi-waveband fusion industrial detection light source regulation method provided in the embodiments of the present application, the light path transmission efficiency model is:

[0027] ,

[0028] wherein: is the wavelength-dependent transmittance of the j-th optical element; and n is the total number of elements passed in the light path.

[0029] Optionally, in the multi-waveband fusion industrial detection light source regulation method provided in the embodiments of the present application, the light source chip integrates multiple thermocouple nodes to collect temperature data T in real time, and the spectral drift function is:

[0030] ,

[0031] wherein is the thermal drift coefficient of the i-th waveband quantum dot, is the calibration temperature, when , the or the scheduling time is automatically adjusted to compensate for the total output spectral drift amount, which is:

[0032] .

[0033] Optionally, in the multi-waveband fusion industrial detection light source regulation method provided in the embodiments of the present application, the drift of a certain waveband before compensation is , and the drift after compensation is , and the formula is as follows:

[0034] ,

[0035] The closer the value of to 1, the more effective the compensation system is. When the actual environmental temperature changes from 25°C to 45°C, the original drift is 18 nm, and the drift after compensation is controlled within 2 nm, it is concluded that:

[0036] ,

[0037] That is, the thermal compensation efficiency reaches 89%.

[0038] In a second aspect, the embodiments of the present application provide a multi-band fusion industrial detection light source regulation system, which comprises a memory and a processor, the memory comprising a multi-band fusion industrial detection light source regulation method program, and the multi-band fusion industrial detection light source regulation method program is executed by the processor to realize the following steps:

[0039] A multi-band initial light source is output by deploying a light-emitting chip array and a spectral conversion type quantum dot coating based on a quantum dot tuning wide spectrum emission mechanism;

[0040] A timing matrix is constructed, and the multi-band initial light source is cooperatively emitted and time-division triggered based on the timing matrix to obtain a multi-band corresponding multi-path excitation light source;

[0041] A light path transmission efficiency model is constructed, and the multi-band corresponding multi-path excitation light source is subjected to multi-band spectrum fusion and light mixing based on the light path transmission efficiency model to obtain a fusion light source;

[0042] A real-time temperature of the light source chip is acquired, and a spectral drift amount corresponding to the real-time temperature of the light source chip is calculated based on a spectral drift function;

[0043] Spectral compensation information is calculated based on the spectral drift amount, and the spectral drift amount is dynamically compensated according to the spectral compensation information to perform spectral drift dynamic correction.

[0044] Optionally, in the multi-band fusion industrial detection light source regulation system described in the embodiments of the present application, the spectrum fusion step is as follows:

[0045] A detection task corresponding band requirement vector is set:

[0046] ,

[0047] A time window scheduling function is set for each band , which satisfies:

[0048] .

[0049] A total spectrum excitation matrix is defined as:

[0050] .

[0051] Optionally, in the multi-band fusion industrial detection light source regulation system described in the embodiments of the present application, a timing matrix T is constructed, which is represented as:

[0052] ,

[0053] Wherein: represents the on-off control state of the i th band in the j th time slice, 1 represents on, and 0 represents off; m is the number of bands; and n is the total number of time slices.

[0054] In a third aspect, the embodiments of the present application further provide a computer readable storage medium, wherein a multi-band fusion industrial detection light source regulation method program is included, and the multi-band fusion industrial detection light source regulation method program is executed by a processor to implement the steps of the multi-band fusion industrial detection light source regulation method according to any one of the above.

[0055] As can be seen from the above, the multi-band fusion industrial detection light source regulation method, system and medium provided by the embodiments of the present application can output a multi-band initial light source by deploying a light-emitting chip array and a spectral conversion type quantum dot coating based on a quantum dot tuning wide spectrum emission mechanism; construct a time sequence matrix, and perform cooperative emission and time-sharing triggering on the multi-band initial light source based on the time sequence matrix to obtain a multi-band corresponding multi-path excitation light source; construct a light path transmission efficiency model, and perform multi-band spectrum fusion and light mixing processing on the multi-band corresponding multi-path excitation light source based on the light path transmission efficiency model to obtain a fusion light source; obtain a real-time temperature of a light source chip, calculate a spectral drift amount corresponding to the real-time temperature of the light source chip based on a spectral drift function; calculate spectral compensation information based on the spectral drift amount, dynamically compensate the spectral drift amount according to the spectral compensation information, and perform spectral drift dynamic correction; perform multi-band light source fusion and light mixing processing, and analyze the spectral drift amount in real time, and realize spectral dynamic correction according to thermal feedback of the real-time temperature of the light source chip, effectively eliminate the emission center drift phenomenon caused by temperature drift, and improve detection performance. BRIEF DESCRIPTION OF DRAWINGS

[0056] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0057] Figure 1 The flow chart of the multi-band fusion industrial detection light source regulation method provided by the embodiments of the present application;

[0058] Figure 2 The block diagram of the multi-band fusion industrial detection light source regulation system provided by the embodiments of the present application;

[0059] Figure 3 The cross-sectional view of the quantum dot multi-layer coating structure of the multi-band fusion industrial detection light source regulation system provided by the embodiments of the present application;

[0060] Figure 4 The spectral fusion path and GRIN optical component layout of the multi-band fusion industrial detection light source regulation system provided by the embodiments of the present application;

[0061] In the figure, 1, the bottom light source chip, 2, the UV response layer; 3, the VIS modulation layer; 4, the IR extension layer; 5, the colloidal carrier material; 6, the UV / VIS / IR input waveguide; 7, the GRIN lens group; 8, the multi-band aspheric mirror; 9, the fiber shaper and output equalization panel. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0063] It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0064] Please refer to Figure 1 , Figure 1 is a flow chart of a multi-band fusion industrial detection light source regulation method in some embodiments of the present application. The multi-band fusion industrial detection light source regulation method is used in a terminal device. The multi-band fusion industrial detection light source regulation method comprises the following steps:

[0065] S101, based on the quantum dot tuning wide spectrum emission mechanism, the light emitting chip array and the spectral conversion type quantum dot coating are disposed, and a multi-band initial light source is output;

[0066] S102, a time sequence matrix is constructed, and the multi-band initial light source is cooperatively emitted and time-division triggered based on the time sequence matrix, to obtain a multi-band corresponding multi-path excitation light source;

[0067] Specifically, by introducing a scheduling matrix T and a scheduling function , a system dynamic scheduling model is established, which has the ability of fast response and multi-task switching. This mechanism allows the system to switch different bands at sub-millisecond level, while considering the selectivity of the detection area and the energy concentration, filling the short board of traditional light sources which can only emit light statically;

[0068] S103, construct a light path transmission efficiency model, perform multi-band spectrum fusion and light mixing processing on the multi-channel excitation light source corresponding to the multi-band based on the light path transmission efficiency model, to obtain a fused light source;

[0069] S104, obtain the real-time temperature of the light source chip, calculate the spectral drift amount corresponding to the real-time temperature of the light source chip based on the spectral drift function;

[0070] S105, calculate spectral compensation information based on the spectral drift amount, dynamically compensate the spectral drift amount according to the spectral compensation information, and perform spectral drift dynamic correction.

[0071] It should be noted that the quantum dot tuning wide spectrum emission mechanism is to use quantum dots (Quantum Dots, QD) as a light modulation and wavelength expansion mechanism. Quantum dot materials have a quantum confinement effect (Quantum Confinement Effect) that their energy band width depends on the size of the particles, so their emission wavelength can be adjusted by controlling the particle size d, and the basic relationship is:

[0072] ,

[0073] wherein:

[0074] h is the Planck constant;

[0075] c is the speed of light;

[0076] is the intrinsic energy band width of the material;

[0077] is the radius of the quantum dot;

[0078] , are the effective mass of the electron and the hole, respectively;

[0079] is the reduced Planck constant.

[0080] It should be noted that the multi-band chip array design and quantum dot matching method is as follows:

[0081] First, select a representative light emitting diode (LED) and laser diode (LD) chip array, covering the following intervals:

[0082] UV chip array: the center wavelength is , and the power range is ;

[0083] VIS chip array: center wavelength ;

[0084] IR chip array: center wavelength .

[0085] Integrating these chip array planes into a composite emission panel, the single panel output aperture is unified to , ensuring the consistency of the post-stage light mixing. Depositing quantum dot coating on top of all chips, its particle size distribution function is defined as:

[0086] ,

[0087] where:

[0088] d is the particle size;

[0089] is the target center particle size of the i-th quantum dot;

[0090] is the standard deviation of the particle size distribution, controlling its spectral width.

[0091] By controlling , the peak emission of different wavebands is matched. For example, to match 365nm emission, CdSe / ZnS quantum dot material with is selected.

[0092] As shown in Figure 3 , the quantum dot multilayer coating structure includes, from bottom to top, a bottom light source chip 1, a UV response layer 2 (particle size d≈2nm); a VIS tuning layer 3 (particle size d≈4nm); an IR extension layer 4 (particle size d≈6nm) and a colloidal carrier material 5.

[0093] By using quantum dot multilayer coating to achieve wideband coverage, through the design of multilayer quantum dots of different particle sizes and materials, the continuous excitation and adjustable control of a single light-emitting chip group in the range of 350-1500nm are realized, which is incomparable to the traditional LED+filter system.

[0094] By selecting quantum dots (such as CdSe, InP, PbS, etc.) of different particle sizes and materials, continuous wavelength coverage from 350nm (deep ultraviolet) to 1500nm (near infrared) can be achieved. A three-layer quantum dot composite film is designed, each layer is customized for different waveband requirements, and its excitation response efficiency function is defined as:

[0095] ,

[0096] where:

[0097] λ represents the wavelength value of the light being considered, which is a variable used to calculate the excitation response efficiency at that wavelength;

[0098] UV, VIS and IR regions, respectively;

[0099] is the dominant emission wavelength for the layer;

[0100] is the bandwidth adjustment factor;

[0101] is the modulation gain parameter.

[0102] According to embodiments of the present application, the spectral fusion step is as follows:

[0103] Set the waveband requirement vector for the detection task:

[0104] ,

[0105] represent the different center wavelengths (or wavebands) required in the detection task, in nanometers (nm).

[0106] For each waveband, set the time window scheduling function satisfies:

[0107] ,

[0108] represents the start time of turning on the i-th waveband light source.

[0109] represents the end time of turning off the i-th waveband light source.

[0110] The total spectral excitation matrix is defined as:

[0111] .

[0112] is a time window scheduling function (Time Window Scheduling Function) for controlling whether the i-th waveband is activated at time t.

[0113] represents the maximum output power (Maximum Power Output) of the i-th waveband.

[0114] It should be noted that the spectral output modeling and energy efficiency optimization method is as follows:

[0115] Considering the total light output as the combination of multiple sub-sources and their excited coating, the total radiant intensity is expressed as:

[0116] ,

[0117] wherein:

[0118] P i (t) is the power output of the i th sub light source at time t;

[0119] R i (t) is the response function of the quantum dot film layer it covers.

[0120] A gain coefficient is introduced which is adjusted by FPGA in real time to calibrate the energy balance and thermal management optimization of each waveband:

[0121] ,

[0122] P i (t) represents the real-time power output of the i th waveband (or sub light source) at time t. S i j represents the on-off control state of the i th waveband at the j th time slice in the timing matrix T.

[0123] The optimization objective function is to maximize the available light intensity while minimizing the thermal load The following optimization model is established:

[0124] ,

[0125] P i (t) represents the maximum optimization of the function (i.e. the power output of the i th sub light source at time t);

[0126] λ min represents the minimum wavelength value (unit: nm) of interest to the system;

[0127] λ max represents the maximum wavelength value (unit: nm) of interest to the system;

[0128] wherein P en is the energy penalty coefficient, Q represents the total heat dissipation.

[0129] According to an embodiment of the present application, the timing matrix T is constructed and represented as:

[0130] ,

[0131] wherein S i j represents the on-off control state of the i th waveband at the j th time slice, 1 represents on and 0 represents off; m is the number of wavebands; n is the total number of time slices.

[0132] According to the embodiment of the present application, since the multi-band light source has the characteristics of strong wavelength difference and different divergence angles, a composite light output path (as shown in Figure 4 ) is designed, which includes a UV / VIS / IR input waveguide,

[0133] three GRIN lens groups, a multi-band aspheric lens, a fiber shaper and an output equalization panel.

[0134] The coupling is realized by using a gradient refractive index (GRIN) lens group, wherein each band corresponds to an independent input port, and finally the aspheric coupling lens is synthesized to a single output aperture light path transmission efficiency model:

[0135] ,

[0136] Among them: is the wavelength-dependent transmittance of the jth optical element; n is the total number of elements passed in the light path. By measuring the transmission efficiency data of different spectra, the fitting curve of is constructed and is compensated in reverse to realize the final spectral output equalization.

[0137] According to the embodiment of the present application, the light source chip integrates multiple thermocouple nodes to collect temperature data T in real time, and the spectral drift function is:

[0138] ,

[0139] Among them is the thermal drift coefficient of the i-th band quantum dot, is the calibration temperature, when , automatically adjust or dispatch time , to compensate the total output spectral drift amount:

[0140] .

[0141] According to the embodiment of the present application, the drift of a certain band before compensation is , and after compensation, it is , and the formula is as follows:

[0142] ,

[0143] The thermal drift compensation efficiency (the, rmal drift suppression efficiency) is used to measure the effectiveness of the spectral thermal drift compensation system;

[0144] The value is closer to 1, the more effective the compensation system, the actual environmental temperature changes from 25℃ to 45℃, the original drift is 18nm, and after compensation, it is controlled within 2nm, and the following is obtained:

[0145] ,

[0146] That is, the compensation efficiency reaches 89%.

[0147] According to the embodiment of the application, a complete performance function system is established to evaluate the comprehensive performance of the application, covering luminous efficiency, spectral balance, thermal drift compensation ability, system response time and energy consumption indicators.

[0148] 1. Comprehensive luminous efficiency index :

[0149] Considering the power output of the light-emitting chip of all wavebands, the quantum dot conversion efficiency, the light path transmittance, the total light output power of the system is:

[0150] ,

[0151] The system luminous efficiency is defined as:

[0152] ,

[0153] The higher the index, the higher the multi-waveband energy output per unit input energy, which is beneficial to improve the detection sensitivity.

[0154] 2. Spectral balance factor :

[0155] Because the uneven energy of different wavebands will lead to the decrease of the signal-to-noise ratio of some detection items, a spectral energy balance factor is introduced:

[0156] ,

[0157] Wherein:

[0158] is the actual energy of waveband i;

[0159] is the arithmetic mean of all ;

[0160] When , it indicates that the energy distribution of each waveband tends to be uniform, which is an excellent index of light mixing system regulation effect.

[0161] 3. Response time index : ​​​

[0162] FPGA trigger response latency consists of the following three parts:

[0163] Light source circuit switching delay ;

[0164] Scheduling instruction parsing delay ;

[0165] Optical response delay ;

[0166] The total response time is:

[0167] ,

[0168] The slowest band response in the measured system is about 750μs, which is much lower than that of traditional mechanical filter wheel systems (20~100ms), and can meet the requirements of high-speed online detection.

[0169] 4. Individual unit thermal energy consumption System heat dissipation balance model:

[0170] The system heat consumption per unit time is:

[0171] ,

[0172] in This refers to the heat-to-electricity conversion efficiency, i.e., the portion that is not converted into light energy. The heat dissipation system utilizes thermal conductivity k and thermal resistance... Fan airflow v jointly regulates plate temperature Establish the steady-state thermal equilibrium equation:

[0173] ,

[0174] Adjustment With thermally conductive material k, the chip can be stabilized at This ensures the stability and lifespan of quantum dots.

[0175] Practical application example:

[0176] Example 1: Detection of cracks on steel surfaces.

[0177] Traditional UV fluorescence detection requires high-intensity 365nm wavelength excitation, supplemented by visible light for background observation. This system achieves this through the following scheduling:

[0178] Time slice Excite the UV365 band, power set to =4W, to excite fluorescence;

[0179] Time slice : Turn off UV, turn on VIS 530nm for image background shooting;

[0180] Time slice : Collect images and synthesize output;

[0181] The strategy cycle is 10ms, the frame rate is 100Hz, the operation time is effectively reduced, and the detection area can be dynamically switched.

[0182] Example two: package temperature uniformity detection.

[0183] In a semiconductor packaging process, the temperature in the device solder joint or resin needs to be measured in real time and non-contact. The system operates in the following mode:

[0184] Start the IR band (940-1450nm);

[0185] Set the thermal imaging window and integrate the IR thermal detector synchronously;

[0186] Scan the whole board at a frequency of 200Hz to generate a thermal distribution map;

[0187] Since the system response time is less than 1ms, the detection period can be shortened to 5ms, and the efficiency is improved by at least 5 times compared with the traditional infrared lamp system.

[0188] Industrial adaptation expansion:

[0189] The present application has the advantages of compact structure, programmability, adjustable spectrum, excellent thermal management, and high industrial adaptability:

[0190] Highly integrated package detection: for mobile phones, automotive electronics, BGA solder joint thermal imaging;

[0191] Space composite material detection: identify interlayer defects by alternating UV and IR scanning;

[0192] Food and pharmaceutical industry: used for visible-near infrared absorption detection of moisture content and impurities;

[0193] Rail transit and rail monitoring: high-frequency and rapid scanning of microcracks;

[0194] In each scene, the scheduling strategy T can be defined and the task-driven spectral intelligent light source system in a true sense is realized.

[0195] As Figure 2 shown, in a second aspect, the embodiments of the present application provide a multi-band fusion industrial detection light source control system, which comprises a memory and a processor, the memory comprises a multi-band fusion industrial detection light source control method program, and the multi-band fusion industrial detection light source control method program is executed by the processor to realize the following steps:

[0196] The light-emitting chip array and the spectral conversion type quantum dot coating are disposed based on a quantum dot tuning wide spectrum emission mechanism, and a multi-band initial light source is output;

[0197] A timing matrix is constructed, and the multi-band initial light source is cooperatively emitted and triggered in time based on the timing matrix, so that a multi-band corresponding multi-path excitation light source is obtained;

[0198] A light path transmission efficiency model is constructed, and the multi-band corresponding multi-path excitation light source is subjected to multi-band spectrum fusion and light mixing based on the light path transmission efficiency model, so that a fusion light source is obtained;

[0199] The real-time temperature of the light source chip is acquired, and the spectral drift amount corresponding to the real-time temperature of the light source chip is calculated based on a spectrum drift function;

[0200] Spectrum compensation information is calculated based on the spectral drift amount, and the spectral drift amount is dynamically compensated according to the spectrum compensation information, so that spectrum drift dynamic correction is performed.

[0201] According to the embodiment of the present application, the spectrum fusion step is as follows:

[0202] The detection task corresponding band requirement vector is set:

[0203] ,

[0204] The time window scheduling function is set for each band , and the following conditions are met:

[0205] .

[0206] The total spectrum excitation matrix is defined as:

[0207] .

[0208] According to the embodiment of the present application, the timing matrix T is constructed and represented as:

[0209] ,

[0210] Wherein: Indicates the on-off control state of the i th band in the j th time slice, 1 indicates on, and 0 indicates off; m is the number of bands; n is the total number of time slices.

[0211] According to the embodiment of the present application, due to the characteristics of strong wavelength difference and different divergence angles of the multi-band light source, a composite derived light path (such as Figure 4 indicated) including UV / VIS / IR input waveguide,

[0212] 3 GRIN lens groups, multi-band aspheric lens, fiber shaper and output equalization panel.

[0213] Coupling is realized by using a gradient refractive index (GRIN) lens group, wherein each waveband corresponds to an independent input port, and finally an aspheric coupling lens is used to synthesize the single output aperture.

[0214] ,

[0215] Wherein: is the wavelength-dependent transmittance of the jth optical element; n is the total number of elements passed in the optical path. By measuring the transmittance efficiency data of different spectra, we construct the fitting curve of and compensate in reverse to realize the final spectral output equalization.

[0216] According to the embodiment of the application, the light source chip integrates multiple thermocouple nodes to collect temperature data T in real time, and the spectral drift function is:

[0217] ,

[0218] Wherein is the thermal drift coefficient of the i-th waveband quantum dot, is the calibration temperature, when , automatically adjust or dispatch time , the total output spectral drift is:

[0219] .

[0220] According to the embodiment of the application, the drift of a certain waveband before compensation is , and after compensation, it is , the formula is as follows:

[0221] ,

[0222] The closer the value of to 1, the more effective the compensation system is. When the measured ambient temperature changes from 25 to 45℃, the original drift is 18nm, and after compensation, it is controlled within 2nm, and it is obtained that:

[0223]

[0224] That is, the thermal compensation efficiency reaches 89%.

[0225] According to the embodiment of the application, it also includes: to evaluate the comprehensive performance of the application, a complete performance function system is established, covering luminous efficiency, spectral equalization degree, thermal drift compensation ability, system response time and energy consumption indicators.

[0226] 1. Integrated light emitting efficiency index :

[0227] Considering the light emitting chip power output of all wavebands , quantum dot conversion efficiency , light path transmittance , the total light output power of the system is:

[0228] ,

[0229] The system light emitting efficiency is defined as:

[0230] ,

[0231] The higher this index is, the higher the multi-waveband energy output per unit input energy, which is beneficial to improve the detection sensitivity.

[0232] 2. Spectral equalization factor :

[0233] Since the uneven energy of different wavebands will lead to the decline of the signal-to-noise ratio of some detection items, we introduce the spectral energy equalization factor:

[0234] ,

[0235] Where:

[0236] is the actual energy of waveband i;

[0237] is the arithmetic mean of all ;

[0238] When , it means that the energy distribution of each waveband tends to be uniform, which is an excellent index for the control effect of the mixed light system.

[0239] 3. Response time index :

[0240] The FPGA trigger response delay is composed of the following three parts:

[0241] Light source circuit switching delay ;

[0242] Scheduling instruction analysis delay ;

[0243] Optical response delay ;

[0244] The total response time is:

[0245] ;

[0246] The slowest band response in the actual system is about 750μs, which is much lower than the traditional mechanical filter wheel system (20~100ms), and can meet the needs of high-speed online detection.

[0247] 4. Single thermal energy consumption Balanced model of system heat dissipation:

[0248] The system heat consumption per unit time is:

[0249] ,

[0250] Where is the thermal-to-electric conversion efficiency, i.e., the part that is not converted into light energy. The heat dissipation system adjusts the plate temperature through thermal conductivity k, thermal resistance , and fan flow rate v, and establishes a steady-state heat balance equation:

[0251] ,

[0252] Adjusting v and thermal conductivity material k can stabilize the chip at , ensuring the stability and life of quantum dots.

[0253] Actual application examples:

[0254] Example 1: Steel surface crack detection.

[0255] Traditional UV fluorescence detection requires high-intensity 365nm waveband light excitation, and is assisted by visible light for background observation. This system adjusts as follows:

[0256] Time slice : Excite UV365 band, power set to =4W, excite fluorescence;

[0257] Time slice : Turn off UV, turn on VIS530nm for image background shooting;

[0258] Time slice : Collect images and synthesize output;

[0259] This strategy has a cycle of 10ms and a frame rate of 100Hz, effectively reducing operation time and allowing dynamic switching of detection areas.

[0260] Example 2: Package temperature uniformity detection.

[0261] During the semiconductor packaging process, real-time non-contact temperature measurement of device solder joints or resin is required. The system operates in the following mode:

[0262] Start IR band (940~1450nm);

[0263] Set up thermal imaging window, integrate IR thermal detector synchronously;

[0264] Scan the whole board at 200Hz frequency, realize thermal distribution map generation;

[0265] Since the system response time is less than 1ms, the detection period can be shortened to 5ms, and the efficiency is improved by at least 5 times compared with the traditional infrared lamp system.

[0266] Industrial adaptation expansion:

[0267] The application has compact structure, programmability, adjustable spectrum, excellent heat management and high industrial adaptability:

[0268] Highly integrated package detection: for mobile phone, automobile electronics, BGA solder joint thermal imaging;

[0269] Space composite material detection: identify interlayer defects by alternating UV and IR scanning;

[0270] Food and pharmaceutical industry: used for visible-near infrared absorption detection of moisture content and impurities;

[0271] Rail transit and rail monitoring: high-frequency rapid scanning of microcracks;

[0272] Each scene can be defined and scheduling strategy T, to realize the "task-driven spectral intelligent light source system" in a true sense.

[0273] The third aspect of the application provides a computer readable storage medium, and the readable storage medium includes a multi-band fusion industrial detection light source control method program. When the multi-band fusion industrial detection light source control method program is executed by a processor, the steps of the multi-band fusion industrial detection light source control method of any one of the above are realized.

[0274] The application discloses a multi-band fusion industrial detection light source regulation method and system and a medium. The method comprises the following steps: a quantum dot tuning wide spectrum emission mechanism is used to deploy a light emitting chip array and a spectrum conversion type quantum dot coating to output a multi-band initial light source; a time sequence matrix is constructed, and the multi-band initial light source is subjected to cooperative emission and time-sharing triggering based on the time sequence matrix to obtain a multi-band corresponding multi-path excitation light source; a light path transmission efficiency model is constructed, and the multi-band corresponding multi-path excitation light source is subjected to multi-band spectrum fusion and light mixing processing based on the light path transmission efficiency model to obtain a fusion light source; real-time temperature of the light source chip is acquired, a spectrum drift amount corresponding to the real-time temperature of the light source chip is calculated based on a spectrum drift function; spectrum compensation information is calculated based on the spectrum drift amount, and the spectrum drift amount is dynamically compensated according to the spectrum compensation information to perform spectrum drift dynamic correction; the multi-band light source fusion light mixing processing is performed, and the spectrum drift amount is analyzed in real time, and spectrum dynamic correction is realized according to the thermal feedback of the real-time temperature of the light source chip, the emission center drift phenomenon caused by temperature drift is effectively eliminated, and the detection performance is improved.

[0275] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other manners. The above described device embodiments are only schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling, direct coupling or communication connection between the components can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0276] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units; they can be located in one place or distributed on multiple network units; and part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0277] In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be realized in the form of hardware or in the form of hardware plus software functional unit.

[0278] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by relevant hardware of program instructions, and the foregoing program can be stored in a readable storage medium, and the program executes the steps of the above-mentioned method embodiments when executed; and the foregoing storage medium includes various media capable of storing program codes, such as a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disc or an optical disc.

[0279] Alternatively, the integrated unit of the present application can be stored in a readable storage medium if it is realized in the form of a software function module and sold or used as an independent product. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product in essence or in the form of a part of the prior art that makes a contribution, and the software product is stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the method described in the embodiments of the present application. The foregoing storage medium includes various media capable of storing program codes, such as a mobile storage device, a ROM, a RAM, a magnetic disc or an optical disc.

Claims

1. A method for controlling industrial detection light sources through multi-band fusion, characterized in that, include: Based on the quantum dot tuned broadband emission mechanism, a light-emitting chip array and a spectrally transforming quantum dot coating are combined to output a multi-band initial light source; A timing matrix is ​​constructed, and based on the timing matrix, multi-band initial light sources are coordinated to emit and time-division trigger to obtain multi-channel excitation light sources corresponding to multiple bands. A light path transmission efficiency model is constructed, and based on the light path transmission efficiency model, multi-band spectral fusion and light mixing processing are performed on multi-band excitation light sources corresponding to multiple bands to obtain a fused light source. Obtain the real-time temperature of the light source chip, and calculate the spectral shift corresponding to the real-time temperature of the light source chip based on the spectral shift function. Spectral compensation information is calculated based on spectral drift, and dynamic compensation of spectral drift is performed based on spectral compensation information to correct spectral drift dynamics. The spectral fusion steps are as follows: Define the band requirement vector corresponding to the detection task: ； These represent different center wavelengths or bands required in the detection task, and the unit is nanometers; For each band, set a time window scheduling function. ,satisfy: ； Indicates the first The start-up time of each band of light source; Indicates the first The shutdown end time of each band of light source; The total spectral excitation matrix is ​​defined as: ； It is a time window scheduling function used to control the first... Each band in time Is it activated? Indicates the first Maximum output power of each band.

2. The multi-band fusion industrial detection light source control method according to claim 1, characterized in that, Constructing the time series matrix , is represented as: ； in: Indicates the first The band in the first The on / off control status of each time slice, 1 indicates on, 0 indicates off; Number of bands; This represents the total number of time slices.

3. The multi-band fusion industrial detection light source control method according to claim 2, characterized in that, The optical path transmission efficiency model is as follows: ； in: For the first The wavelength of each optical element depends on its transmittance; This represents the total number of elements passing through the optical path.

4. A multi-band fusion industrial inspection light source control system, characterized in that, The system includes a memory and a processor. The memory contains a program for a multi-band fusion industrial detection light source control method. When the program for the multi-band fusion industrial detection light source control method is executed by the processor, it performs the following steps: Based on the quantum dot tuned broadband emission mechanism, a light-emitting chip array and a spectrally transforming quantum dot coating are combined to output a multi-band initial light source; A timing matrix is ​​constructed, and based on the timing matrix, multi-band initial light sources are coordinated to emit and time-division trigger to obtain multi-channel excitation light sources corresponding to multiple bands. A light path transmission efficiency model is constructed, and based on the light path transmission efficiency model, multi-band spectral fusion and light mixing processing are performed on multi-band excitation light sources corresponding to multiple bands to obtain a fused light source. Obtain the real-time temperature of the light source chip, and calculate the spectral shift corresponding to the real-time temperature of the light source chip based on the spectral shift function. Spectral compensation information is calculated based on spectral drift, and dynamic compensation of spectral drift is performed based on spectral compensation information to correct spectral drift dynamics. The spectral fusion steps are as follows: Define the band requirement vector corresponding to the detection task: ； These represent different center wavelengths or bands required in the detection task, and the unit is nanometers; For each band, set a time window scheduling function. ,satisfy: ； Indicates the first The start-up time of each band of light source; Indicates the first The shutdown end time of each band of light source; The total spectral excitation matrix is ​​defined as: ； It is a time window scheduling function used to control the first... Each band in time Is it activated? Indicates the first Maximum output power of each band.

5. The multi-band fusion industrial detection light source control system according to claim 4, characterized in that, Constructing the time series matrix , is represented as: ； in: Indicates the first The band in the first The on / off control status of each time slice, 1 indicates on, 0 indicates off; Number of bands; This represents the total number of time slices.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a multi-band fusion industrial detection light source control method program. When the multi-band fusion industrial detection light source control method program is executed by a processor, it implements the steps of the multi-band fusion industrial detection light source control method as described in any one of claims 1 to 3.

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