High-precision multi-channel data acquisition method

Abstract

The invention discloses a high-precision multi-channel data acquisition method, relates to the technical field of multi-channel data acquisition, and is used for solving the problem that the risk of beam mode distortion caused by pumping current fluctuation is increased. Pumping current is acquired in a laser cavity to calculate a fluctuation coefficient, and an alternating-current impedance amplitude is acquired in combination with impedance detection; carrying out standardized multiplication to generate an electric strength coefficient, calibrating a statistical coefficient in time to obtain a reference threshold value, calling a gain factor, obtaining a light beam radius variable quantity by using an extra-cavity detector, calculating a down-regulation ratio to obtain a down-regulation threshold value, comparing the electric strength coefficient with the down-regulation threshold value, and if a light beam mode is distorted, carrying out standard multiplication; if yes, triggering the multi-channel wavefront sensing array to collect information and check triggering consistency, and if not, correcting a current fluctuation coefficient based on light beam intensity, combining impedance to generate an update coefficient, comparing the update coefficient with a down-regulation threshold value, and if the update coefficient exceeds the limit, triggering an alarm and outputting a protection instruction; and beam mode distortion caused by pumping current fluctuation is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of multi-channel data acquisition technology, and more specifically, to a high-precision multi-channel data acquisition method. Background Technology

[0002] As lasers develop towards higher power, higher stability, and narrower linewidth, the accuracy of laser cavity current driving, AC impedance characteristics, and beam mode stability have become key factors affecting laser output performance. Traditional laser cavity parameter monitoring methods usually rely on single-point acquisition and single signal processing, making it difficult to synchronously and accurately quantify the electric intensity, pump current fluctuations, and beam mode distortion within the laser cavity under dynamic operating conditions.

[0003] Currently, in order to improve detection accuracy, researchers have attempted to introduce multi-channel wavefront sensing arrays, extracavity beam detectors, and current detection modules to work together. However, existing multi-channel data acquisition systems have the following shortcomings:

[0004] In existing technologies, the triggering time of multi-channel acquisition units is prone to deviation. Beam mode distortion is determined based on empirical thresholds without considering dynamic correction. Furthermore, when the laser output state changes rapidly, the triggering of protection actions is easily delayed. It is impossible to fully utilize the high-confidence data of local channels to correct the overall detection results, resulting in phase mismatch during signal fusion, a high misjudgment rate, and an increased risk of beam mode distortion caused by pump current fluctuations. Therefore, a high-precision multi-channel data acquisition method is proposed.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a high-precision multi-channel data acquisition method, which solves the problems mentioned in the background art by employing a multi-channel wavefront sensing and dynamic threshold correction fusion algorithm for electrical intensity.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-precision multi-channel data acquisition method, comprising the following steps:

[0008] Step S1: Inside the laser cavity, collect the laser pump current and calculate the current fluctuation coefficient, detect the AC impedance inside the laser cavity, and calculate the electric intensity coefficient inside the laser cavity based on the current fluctuation coefficient.

[0009] Step S2: Set the calibration time, obtain the electrical intensity reference threshold within the calibration time, call the gain factor in the gain factor database, collect the change in the radius of the external beam through the external beam detector, combine the gain factor to generate the reduction ratio of the electrical intensity reference threshold, and calculate the reduction threshold by combining the electrical intensity reference threshold with the reduction ratio.

[0010] Step S3: Compare the electrical intensity coefficient with the down-adjustment threshold to determine whether the current laser cavity beam mode is distorted. If the beam mode is distorted, trigger the multi-channel wavefront sensor array to collect beam information and call the clock data to verify whether the time triggering of each channel is consistent.

[0011] Step S4: When the time trigger is inconsistent, select the beam information of the subset channel to correct the current fluctuation coefficient and generate an updated electrical intensity coefficient. Compare the updated electrical intensity coefficient with the lowered threshold to determine whether to trigger an alarm. When an alarm is triggered, generate a protection action command.

[0012] In a preferred embodiment, in step S1, a laser pump current signal is acquired in the laser cavity by a current acquisition device installed in the laser pump source and converted into a laser pump current value to generate a time-series current data sequence.

[0013] Calculate the mean and standard deviation of the time-series current data series;

[0014] The ratio of the mean of the time-series current data sequence to the standard deviation of the time-series current data sequence is used as the current fluctuation coefficient.

[0015] In a preferred embodiment, in step S1, the current amplitude, voltage amplitude, and phase difference of the response voltage signal and the response current signal are acquired by an impedance detection device.

[0016] Based on the definition of impedance, the AC impedance is calculated as follows: ;

[0017] in, Voltage amplitude, The current amplitude, For phase difference, Let j be the natural constant and j be the imaginary unit. AC impedance;

[0018] The magnitude of the AC impedance is calculated, and the product of the current fluctuation coefficient and the magnitude of the AC impedance after standardization is used as the electrical intensity coefficient.

[0019] In a preferred embodiment, in step S2, a calibration time interval is set during the operation of the laser cavity;

[0020] The electrical intensity coefficients within the calibration time interval are statistically analyzed to obtain time-series data of the electrical intensity coefficients.

[0021] The mean of the time series data of the electrical intensity coefficient is calculated, and the mean electrical intensity coefficient is used as the reference threshold for electrical intensity.

[0022] Retrieve gain factors from the gain factor database;

[0023] The output beam radius is detected by a beam detector installed outside the laser cavity. The change in the external beam radius is obtained by subtracting the output beam radius from the reference beam radius of the laser cavity.

[0024] In a preferred embodiment, in step S2, the down-adjustment ratio of the electrical intensity reference threshold is calculated based on the change in beam radius and the gain factor;

[0025] The electrical intensity down-adjustment threshold is calculated based on the electrical intensity baseline threshold and the down-adjustment ratio:

[0026] ;

[0027] in, To lower the threshold for electrical intensity, The reference threshold for electrical strength, This is the rate at which the electrical strength reference threshold is lowered.

[0028] In a preferred embodiment, in step S3, if the electrical intensity coefficient is greater than the down-adjustment threshold, it is determined that the current laser cavity beam mode is in a distorted state.

[0029] Conversely, the current laser beam mode within the cavity is determined to be in a normal state.

[0030] When the current laser beam mode in the cavity is determined to be distorted, beam information is acquired through a multi-channel wavefront sensor array.

[0031] In a preferred embodiment, in step S3, a preset acquisition window is set, and the beam information of each channel is acquired by a multi-channel wavefront sensor array deployed in the laser cavity within the acquisition window. At the same time, clock data is called to record the timestamp of the acquisition of the beam information of each channel.

[0032] The beam information is obtained by acquiring the beam intensity value of each channel through a multi-channel wavefront sensing array;

[0033] If the timestamps of all channels fall within the preset acquisition time window, it is determined that the acquisition time of multiple channels is consistent.

[0034] Otherwise, it is determined that the timing of multi-channel acquisition is inconsistent.

[0035] In a preferred embodiment, in step S4, when the timing triggers of multi-channel acquisition are inconsistent, the average value of the beam intensity of each channel is calculated to obtain the reference beam intensity.

[0036] Channels with beam intensity values ​​lower than the reference beam intensity are marked, and the beam intensity difference is obtained by subtracting the maximum and minimum values ​​of the marked channel's beam intensity.

[0037] The ratio of the intensity difference to the intensity of the reference beam is used as a correction factor.

[0038] In a preferred embodiment, in step S4, the product of the correction factor and the current fluctuation coefficient is used as the corrected current fluctuation coefficient.

[0039] The corrected current fluctuation coefficient is calculated based on the AC impedance, and the corrected electrical intensity coefficient is used as the updated electrical intensity coefficient.

[0040] If the updated electrical intensity coefficient exceeds the lowering threshold, an alarm is triggered and a protection action command is generated; otherwise, no alarm is triggered.

[0041] The technical effects and advantages of this invention are as follows:

[0042] This invention generates an electrical intensity coefficient by acquiring the laser pump current within the laser cavity, calculating the current fluctuation coefficient, and combining it with the AC impedance amplitude obtained by an impedance detection device at the operating frequency band. These two values ​​are then multiplied after standardization. Next, within a set calibration time interval, the electrical intensity coefficient is statistically calculated to obtain an electrical intensity reference threshold. Simultaneously, gain factors are retrieved from a gain factor database, and the beam radius change is acquired using an external beam detector to calculate the reduction ratio of the electrical intensity reference threshold, resulting in an electrical intensity reduction threshold. The electrical intensity coefficient is compared with the reduction threshold. When beam mode distortion exists, a multi-channel wavefront sensing array is triggered to acquire beam information, and the timing consistency of each channel is verified using clock data. If the multi-channel triggering is consistent, data reliability is maintained; if the triggering is inconsistent, a correction factor is calculated based on the beam intensity of each channel to correct the current fluctuation coefficient, and an updated electrical intensity coefficient is generated based on the AC impedance. Finally, the updated electrical intensity coefficient is compared with the lowered threshold. If the limit is exceeded, an alarm is triggered and a protection action command is output, thereby effectively avoiding beam pattern distortion caused by pump current fluctuations and significantly improving the synchronization accuracy of multi-channel data acquisition and the response speed of laser protection actions. Attached Figure Description

[0043] Figure 1 This is a flowchart illustrating the implementation of a high-precision multi-channel data acquisition method according to the present invention.

[0044] Figure 2This is a schematic diagram illustrating the steps of a high-precision multi-channel data acquisition method according to the present invention. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] This invention generates an electrical intensity coefficient by acquiring the laser pump current within the laser cavity, calculating the current fluctuation coefficient, and combining it with the AC impedance amplitude obtained by an impedance detection device at the operating frequency band. These two values ​​are then multiplied after standardization. Next, within a set calibration time interval, the electrical intensity coefficient is statistically calculated to obtain an electrical intensity reference threshold. Simultaneously, gain factors are retrieved from a gain factor database, and the beam radius change is acquired using an external beam detector to calculate the reduction ratio of the electrical intensity reference threshold, resulting in an electrical intensity reduction threshold. The electrical intensity coefficient is compared with the reduction threshold. When beam mode distortion is detected, a multi-channel wavefront sensor array is triggered to acquire beam information, and the timing consistency of each channel is verified using clock data. If the multi-channel triggers are consistent, data reliability is maintained; if the triggers are inconsistent, a correction factor is calculated based on the beam intensity of each channel to correct the current fluctuation coefficient, and an updated electrical intensity coefficient is generated based on the AC impedance. Finally, the updated electrical intensity coefficient is compared with the reduction threshold. If the threshold is exceeded, an alarm is triggered and a protection action command is output, effectively preventing beam mode distortion caused by pump current fluctuations.

[0047] Example 1

[0048] Please see Figures 1 to 2 A high-precision multi-channel data acquisition method, the specific operation process is as follows:

[0049] Step S1: Inside the laser cavity, collect the laser pump current and calculate the current fluctuation coefficient, detect the AC impedance inside the laser cavity, and calculate the electric intensity coefficient inside the laser cavity based on the current fluctuation coefficient.

[0050] Step S2: Set the calibration time, obtain the electrical intensity reference threshold within the calibration time, call the gain factor in the gain factor database, collect the change in the radius of the external beam through the external beam detector, combine the gain factor to generate the reduction ratio of the electrical intensity reference threshold, and calculate the reduction threshold by combining the electrical intensity reference threshold with the reduction ratio.

[0051] Step S3: Compare the electrical intensity coefficient with the down-adjustment threshold to determine whether the current laser cavity beam mode is distorted. If the beam mode is distorted, trigger the multi-channel wavefront sensor array to collect beam information and call the clock data to verify whether the time triggering of each channel is consistent.

[0052] Step S4: When the time trigger is inconsistent, select the beam information of the subset channel to correct the current fluctuation coefficient and generate an updated electrical intensity coefficient. Compare the updated electrical intensity coefficient with the lowered threshold to determine whether to trigger an alarm. When an alarm is triggered, generate a protection action command.

[0053] The specific implementation is as follows:

[0054] In step S1, the laser pump current signal is acquired in the laser cavity by a current acquisition device installed in the laser pump source and converted into a laser pump current value to generate a time-series current data sequence.

[0055] The mean and standard deviation of the time-series current data series are calculated using the following formulas:

[0056] ;

[0057] in, The mean of the time-series current data sequence. Let N be the nth laser pump current value, and N be the total number of laser pump current values. This represents the standard deviation of the time-series current data sequence.

[0058] The ratio of the mean of the time-series current data sequence to the standard deviation of the time-series current data sequence is used as the current fluctuation coefficient.

[0059] The current fluctuation coefficient reflects the relative fluctuation amplitude of the laser pump current and characterizes the pumping stability within the laser cavity.

[0060] It should be noted that the pump current acquisition device refers to a measuring device used to acquire the output current signal of the laser pump source in real time. It can convert the laser pump current into a digitally processable signal and convert it into a current value.

[0061] Simultaneously, the AC impedance within the laser cavity is detected. During the laser cavity's operation, an AC excitation signal is introduced within the laser cavity's operating frequency band by an impedance detection device. This AC excitation signal, after passing through the cavity's equivalent circuit, generates a response voltage signal and a response current signal. The response voltage signal and response current signal are simultaneously sampled to extract the current amplitude, voltage amplitude, and phase difference.

[0062] Based on the definition of impedance, the AC impedance is calculated using the following formula:

[0063] ;

[0064] in, Voltage amplitude, The current amplitude, For phase difference, Let j be the natural constant and j be the imaginary unit. It represents the AC impedance.

[0065] It should be noted that the impedance detection device is an electrical detection module consisting of an excitation unit, a sampling unit, and a signal processing unit. The excitation unit is used to provide a stable AC excitation source, the sampling unit is used to synchronously acquire voltage and current signals, and the signal processing unit is used to calculate the amplitude and phase of the sampled data and output impedance parameters.

[0066] Further calculate the amplitude of the AC impedance, and use the product of the current fluctuation coefficient and the amplitude of the AC impedance after standardization as the electrical intensity coefficient.

[0067] The electrical intensity coefficient is a comprehensive parameter obtained by multiplying the current fluctuation coefficient by the AC impedance amplitude. It is used to simultaneously reflect the dynamic stability of the laser cavity at the electrical level and the cavity's response capability to current fluctuations. The current fluctuation coefficient characterizes the relative instability of the pump current, while the AC impedance amplitude characterizes the cavity's load-bearing characteristics and response intensity under AC excitation. The electrical intensity coefficient obtained by combining the two quantifies the amplification effect of electrical disturbances in the laser cavity on pump stability.

[0068] It should be noted that the standardization methods include, but are not limited to, standard linear transformation based on interval scaling, statistical Z-Score standardization, or normalization based on nonlinear mapping functions. The application methods of standardization will not be elaborated here.

[0069] By simultaneously acquiring the pump current fluctuation coefficient and AC impedance within the laser cavity and combining them to obtain the electrical intensity coefficient, a comprehensive quantification of the electrical disturbance and pump stability of the laser cavity is achieved, thereby accurately reflecting the stability characteristics of the laser cavity during dynamic operation.

[0070] In step S2, during the operation of the laser cavity, a calibration time interval is set, denoted as . Within the calibration time interval, statistical processing is performed on the time-series data based on the electrical intensity coefficient to calculate the mean electrical intensity coefficient within the calibration time interval, and the mean electrical intensity coefficient is defined as the electrical intensity reference threshold.

[0071] After obtaining the electrical intensity reference threshold, the gain factor matching the current working conditions is retrieved through the gain factor database. The gain factor database is a preset multi-dimensional parameter table, with the laser operating wavelength and pump power as index variables. Each set of laser operating wavelength and pump power corresponds to a unique gain factor. The laser operating wavelength provided by the laser control module and the pump power provided by the pump source power control module are read. The laser operating wavelength and pump power are used as input parameters to retrieve the gain factor from the gain factor database and output the corresponding gain factor.

[0072] The output beam radius is detected by a beam detector installed outside the laser cavity, and the two-dimensional intensity distribution of the output beam spot is acquired. The output beam radius is obtained by Gaussian fitting. The change in the external beam radius is obtained by subtracting the output beam radius from the reference beam radius of the laser cavity.

[0073] ;

[0074] in, This represents the change in the radius of the external beam. The current output beam radius, The reference beam radius.

[0075] like This indicates that the output light spot is diverging; if This indicates that the output light spot has shrunk.

[0076] It should be noted that the beam detector is a measuring device used to acquire the spatial intensity distribution of the output beam outside the cavity. It includes an imaging sensing unit and a signal processing unit. The imaging sensing unit is a CMOS type optical sensor used to convert the two-dimensional intensity distribution of the beam into an electrical signal. The signal processing unit digitizes the acquired two-dimensional intensity data and outputs a beam spot distribution matrix, providing raw data for subsequent beam radius calculation. The Gaussian fitting method is a mathematical processing method based on the beam intensity distribution model. The reference beam radius refers to the output beam radius measured and stored during the initialization and calibration phase. Under stable operating conditions of the laser cavity, the two-dimensional intensity distribution of the output beam is acquired by the beam detector, and the beam radius is calculated using the Gaussian fitting method as the reference beam radius.

[0077] The down-adjustment ratio of the electrical intensity reference threshold is calculated based on the change in beam radius and the gain factor. The specific calculation formula is as follows:

[0078] ;

[0079] in, This is the reduction ratio of the electrical strength reference threshold. This represents the change in the radius of the external beam. As the reference beam radius, It is the gain factor.

[0080] After obtaining the baseline threshold for electrical intensity and the downgrade ratio, the electrical intensity downgrade threshold is further calculated using the following formula:

[0081] ;

[0082] in, To lower the threshold for electrical intensity, The reference threshold for electrical strength, This is the rate at which the electrical strength reference threshold is lowered.

[0083] The electrical intensity reduction threshold is used as a corrected reference value to determine whether the current electrical intensity coefficient exceeds the safe range, thus providing a direct basis for the subsequent beam mode distortion determination and compensation mechanism.

[0084] By calculating the reference threshold of electrical intensity within the calibration time and generating the electrical intensity reduction threshold by combining the gain factor and the change in beam radius, dynamic correction of the threshold is achieved, avoiding the judgment deviation caused by the fixed threshold, thereby improving the accuracy and adaptability of beam mode determination.

[0085] In step S3, if the electrical intensity coefficient is greater than the down-adjustment threshold, the current laser cavity beam mode is determined to be in a distorted state; otherwise, the current laser cavity beam mode is determined to be in a normal state.

[0086] When the current laser cavity beam mode is determined to be distorted, beam information is acquired through a multi-channel wavefront sensor array.

[0087] A preset acquisition window is set up. Within the acquisition window, the beam information of each channel is acquired by a multi-channel wavefront sensor array deployed in the laser cavity. At the same time, clock data is called to record the acquired beam information of each channel.

[0088] The beam information is obtained by acquiring the beam intensity value of each channel through a multi-channel wavefront sensing array;

[0089] If the timestamps of all channels fall within the preset acquisition time window, the acquisition time triggers of the multiple channels are considered to be consistent; otherwise, the acquisition time triggers of the multiple channels are considered to be inconsistent.

[0090] The beam pattern is determined to be distorted by comparing the current electrical intensity coefficient with the down-adjustment threshold. When the beam pattern is distorted, the multi-channel wavefront sensor array is triggered to collect beam information. The timing of each channel's collection is checked using clock data to ensure the synchronization of multi-channel beam information and avoid compensation errors caused by channel asynchrony.

[0091] It should be noted that the preset acquisition window is a fixed time interval pre-set within the laser cavity for the multi-channel wavefront sensing array. It determines whether the timestamp of each channel falls within the preset acquisition window. For example, the preset acquisition window is set to 10 microseconds. The multi-channel wavefront sensing array is an optical sensing device deployed within the laser cavity, consisting of multiple wavefront detection channels. Each channel independently acquires the beam information of the laser beam at the corresponding channel position. The clock data is a high-precision time reference in the multi-channel wavefront sensing array, used to record the timestamp of the beam information acquired by each channel.

[0092] By comparing the electrical intensity coefficient with the electrical intensity reduction threshold in real time, and triggering a multi-channel wavefront sensor array to collect beam information when the beam mode is distorted, and combining this with clock data for synchronization verification, timely detection and synchronization protection of beam mode anomalies are achieved, thereby ensuring the reliability and consistency of data acquisition.

[0093] In step S4, when the timing of multi-channel acquisition is inconsistent, the average value of the beam intensity of each channel is calculated to obtain the reference beam intensity. Channels with beam intensity values ​​lower than the reference beam intensity are marked, and the difference between the maximum and minimum values ​​of the beam intensity of the marked channels is obtained to obtain the light intensity difference.

[0094] The ratio of the light intensity difference to the intensity of the reference beam is used as a correction factor, and the product of the correction factor and the current fluctuation coefficient is used as the corrected current fluctuation coefficient.

[0095] When the correction factor is greater than 1, it indicates that the beam intensity value deviates significantly from the reference beam intensity, and the influence of laser pump current fluctuations on beam mode distortion is higher; when the correction factor is less than 1, it indicates that the beam intensity value deviates slightly from the reference beam intensity, and the influence of laser pump current fluctuations on beam mode distortion is lower.

[0096] The corrected current fluctuation coefficient is calculated based on the AC impedance, and the corrected current intensity coefficient is used as the updated current intensity coefficient.

[0097] Fluctuations in the laser pump current can lead to beam pattern fluctuations or deviations in beam intensity. When the triggering of the multi-channel wavefront sensing array is inconsistent, the beam intensity of some channels will deviate from the normal value, reflecting that the current fluctuation of the corresponding channel is large. The average beam intensity of each channel is calculated as the reference beam intensity, and the light intensity difference of channels with lower light intensity is analyzed. The ratio of the light intensity difference to the reference beam intensity is determined as the correction factor. Furthermore, the correction factor is combined with the original current fluctuation coefficient to quantify the distortion effect of laser pump current fluctuation on beam pattern and is used to correct the current fluctuation coefficient.

[0098] The updated electrical strength coefficient is compared with the lowered threshold. If the updated electrical strength coefficient exceeds the lowered threshold, an alarm is triggered and a protection action command is generated. Otherwise, no alarm is triggered.

[0099] The alarm trigger includes issuing an abnormal signal to indicate that the current laser operating status is abnormal, and the protection action command is to reduce the laser pump current to prevent further distortion of the beam mode.

[0100] By calculating correction factors for multi-channel beam information, the current fluctuation coefficient is corrected and an updated electrical intensity coefficient is generated. This coefficient is then compared with the lowered threshold to trigger an alarm, thus realizing a dynamic compensation and protection mechanism for abnormal beam patterns, which effectively improves the stability and safety of the system.

[0101] The above formulas are all dimensionless calculations. The formulas are derived from software simulations based on a large amount of collected data to obtain the most recent real-world results. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0102] The above embodiments can be implemented, in whole or in part, by software, hardware, firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0103] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0104] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0105] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0106] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0107] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0108] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0109] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0110] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0111] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0112] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the above specification.

Claims

1. A high-precision multi-channel data acquisition method, characterized in that: The method comprises the following steps: Step S1: In the laser cavity, the laser pumping current is collected and the current fluctuation coefficient is calculated, the alternating current impedance in the laser cavity is detected, and the electric intensity coefficient in the laser cavity is calculated in combination with the current fluctuation coefficient; Step S2: Set the calibration time, obtain the electric intensity reference threshold value within the calibration time, call the gain factor of the gain factor database, collect the cavity outside beam radius variation through the cavity outside beam detector, generate the down-regulation ratio of the electric intensity reference threshold value in combination with the gain factor, and calculate the down-regulation threshold value of the electric intensity reference threshold value and the down-regulation ratio; Step S3: The electric intensity coefficient is compared with the down-regulation threshold value to determine whether the beam mode in the current laser cavity is distorted, and the multi-channel wavefront sensing array is triggered to collect the beam information when the beam mode is distorted, and the clock data is verified to determine whether the time triggered by each channel is consistent; Step S4: When the time triggered is inconsistent, the beam information of the subset channel is selected to correct the current fluctuation coefficient and generate the updated electric intensity coefficient, and the updated electric intensity coefficient is compared with the down-regulation threshold value to determine whether the alarm is triggered, and the protection action instruction is generated when the alarm is triggered.

2. The high-precision multi-channel data acquisition method according to claim 1, wherein: in step S1, the laser pumping current signal is obtained in the laser cavity through the current collection device installed on the laser pumping source and converted into the laser pumping current value, and the time sequence current data sequence is generated; the mean value of the time sequence current data sequence and the standard deviation of the time sequence current data sequence are calculated; the ratio of the mean value of the time sequence current data sequence to the standard deviation of the time sequence current data sequence is taken as the current fluctuation coefficient.

3. The high-precision multi-channel data acquisition method according to claim 2, wherein: in step S1, the current amplitude, voltage amplitude and phase difference of the response voltage signal and response current signal are collected through the impedance detection device; the amplitude of the alternating current impedance is calculated, and the product of the current fluctuation coefficient and the amplitude of the alternating current impedance after standardization processing is taken as the electric intensity coefficient.

4. The high-precision multi-channel data acquisition method according to claim 1, wherein: According to the impedance definition formula, the alternating current impedance is calculated: ; wherein is the voltage amplitude, is the current amplitude, is the phase difference, is the natural constant, j is the imaginary unit, is the alternating current impedance; in step S2, during the operation of the laser cavity, a calibration time interval is set; the electric intensity coefficients in the calibration time interval are counted to obtain the time sequence data of the electric intensity coefficients; the mean value of the time sequence data of the electric intensity coefficients is calculated to obtain the electric intensity reference threshold value as the electric intensity reference threshold value; the gain factor is called through the gain factor database; the output beam radius is detected through the beam detector installed outside the laser cavity, the output beam radius is subtracted from the reference beam radius of the laser cavity, and the cavity outside beam radius variation is obtained.

5. The high-precision multi-channel data acquisition method according to claim 4, wherein: in step S2, the down-regulation ratio of the electric intensity reference threshold value is calculated based on the beam radius variation and the gain factor; the electric intensity down-regulation threshold value is calculated based on the electric intensity reference threshold value and the down-regulation ratio:

6. The high-precision multi-channel data acquisition method according to claim 1, wherein: in step S3, if the electric intensity coefficient is greater than the down-regulation threshold value, it is judged that the beam mode in the current laser cavity is in a distorted state; ； wherein is the electrical strength down threshold, is the electrical strength reference threshold, is the down ratio of the electrical strength reference threshold. ​ ​ Conversely, it is judged that the current laser cavity beam mode is normal state; When it is judged that the current laser cavity beam mode is distortion state, the light beam information is collected through the multi-channel wavefront sensing array.

7. The high-precision multi-channel data acquisition method of claim 6, wherein: In step S3, a preset acquisition window is set, and the light beam information of each channel is collected through the multi-channel wavefront sensing array arranged in the laser cavity within the acquisition window, and the clock data is called to record the time stamp of the light beam information of each channel; The light beam information is the light beam intensity value of each channel obtained through the multi-channel wavefront sensing array; If the time stamps of all channels fall within the preset acquisition time window, it is determined that the time trigger of multi-channel acquisition is consistent; Otherwise, it is determined that the time trigger of multi-channel acquisition is inconsistent.

8. The high-precision multi-channel data acquisition method of claim 7, wherein: In step S4, when the time trigger of multi-channel acquisition is inconsistent, the average value of the light beam intensity values of each channel is calculated to obtain the reference light beam intensity; The channels with light beam intensity values lower than the reference light beam intensity are marked, and the difference between the maximum value and the minimum value of the light beam intensity values of the marked channels is obtained to obtain the light intensity difference value; The ratio of the light intensity difference value to the reference light beam intensity is taken as the correction factor.

9. The high-precision multi-channel data acquisition method of claim 8, wherein: In step S4, the product of the correction factor and the current fluctuation coefficient is taken as the corrected current fluctuation coefficient; Based on the corrected current fluctuation coefficient, the corrected electric intensity coefficient is calculated by combining the alternating current impedance, and the corrected electric intensity coefficient is taken as the updated electric intensity coefficient; If the updated electric intensity coefficient exceeds the downshift threshold, it is judged that the alarm is triggered and the protection action instruction is generated, otherwise, it is judged that the alarm is not triggered.

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