Laser optical axis calibration device and calibration method

Abstract

The present invention relates to the field of laser calibration technology, and specifically to a laser optical axis calibration device and calibration method. The device includes an optical axis offset detection module, a calibration parameter calculation module, a dynamic adjustment implementation module, and a calibration effect evaluation module. In the present invention, by real-time monitoring of the laser transmitter output, the instantaneous deviation evaluation and dynamic calibration of the optical axis enhance response speed and accuracy. Data analysis technology is used to predict the optical axis offset trend, effectively control the future offset path, reduce non-critical calibration, and thus improve the long-term performance and stability of the equipment. Dynamic adjustment measures are adopted to fine-tune the position of the angle adjuster and optical elements to ensure high calibration accuracy and reduce energy loss and equipment wear. The calibration effect evaluation of the vibration sensor provides instant feedback for the operation, increases the transparency of the calibration process, and enables operators to make more accurate decisions based on detailed data, thereby enhancing the reliability and operational efficiency of the calibration task.

Description

Technical Field

[0001] The present invention relates to the technical field of laser calibration, and in particular to a laser optical axis calibration device and a calibration method. Background Art

[0002] The field of laser calibration technology involves leveraging the high directivity and collimation of lasers to ensure precise alignment of mechanical equipment, components, or systems. This technology is widely used in industrial automation, precision engineering, mechanical manufacturing, and research and development to improve the operational accuracy and efficiency of equipment. Laser calibration technology enables equipment to maintain high precision over long periods of operation, reducing mechanical wear and extending equipment life. This technology involves using laser transmitters and receivers to detect and adjust the relative positions of equipment components to ensure they operate on a predetermined, precise trajectory.

[0003] Among them, the laser optical axis calibration device is a device used to adjust and correct the laser beam path to ensure the correct alignment of the optical axis. This device is mainly used in laser systems to ensure the linearity and accuracy of laser output, thereby improving the effect and accuracy of laser processing, measurement or transmission. The optical axis calibration device includes a laser emission source, an adjustment mechanism and a detection unit. Through fine mechanical adjustment and optical monitoring, it can achieve precise alignment of the optical axis. This device has important applications in optical experiments, precision processing, long-distance communications and scientific research.

[0004] Existing technologies primarily rely on manual periodic inspection and adjustment, lacking real-time data monitoring and immediate feedback mechanisms. This results in a slow calibration response and an inability to effectively address the immediate changes in equipment under complex operating environments. In existing technologies, optical axis calibration is reactive, meaning adjustments are only made after significant deviation occurs. This approach leads to increased mechanical wear and shortened equipment life. The lack of advanced data analysis makes it difficult to accurately predict long-term optical axis deviation trends, making proactive maintenance or adjustments impossible. These technical limitations not only impact equipment operating efficiency and output quality, but also increase maintenance costs and downtime, reducing overall production efficiency. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a laser optical axis calibration device and calibration method.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a laser optical axis calibration device comprising:

[0007] The optical axis offset detection module measures the deviation between the current optical element position and the preset target based on the real-time output data of the laser transmitter, including angular error and position offset, obtains preliminary deviation evaluation data, analyzes the optical axis offset trend, and generates optical axis offset trend analysis results;

[0008] The calibration parameter calculation module predicts the offset path of the optical axis in a future time period based on the optical axis offset trend analysis result, calculates the adjustment value of the angle adjuster, maintains the optical axis on a predetermined trajectory, obtains calibration parameter adjustment recommendation data, sets laser calibration parameters according to the calibration parameter adjustment recommendation data, and generates calibration adjustment control operation parameter values;

[0009] The dynamic adjustment implementation module adjusts the angle adjuster of the laser, modifies the position and angle of the optical element, and adjusts the optical axis based on the calibration adjustment control operating parameter value, generates an optical axis adjustment execution record, provides feedback on the adjustment effect based on the optical axis adjustment execution record, adjusts the optical axis to a preset accuracy standard, and obtains an overview of the adjusted optical axis data;

[0010] The calibration effect evaluation module evaluates the accuracy of the optical axis after calibration based on the overview of the adjusted optical axis data. It detects the alignment accuracy of the optical axis and the target optical path through a vibration sensor and compares it with industry standards. It verifies and records the success rate of the optical axis calibration to obtain an overview of the laser optical axis calibration effect.

[0011] As a further solution of the present invention, the steps for obtaining the optical axis offset trend analysis result are specifically as follows:

[0012] Based on the real-time output data of the laser transmitter, the position parameter set of the optical element is extracted, including the angular coordinates and position offset. The basic deviation data of the optical element relative to the target position is determined through real-time measurement, and the preliminary deviation data of the optical axis position is obtained.

[0013] The preliminary deviation data of the optical axis position is called and the deviation trend fitting operation is performed in combination with the real-time time series parameters using the formula:

[0014]

[0015] Calculate the optical axis offset trend value and generate the optical axis offset trend fitting result, where T t Indicates the trend value at time point t, d i Indicates the deviation value of the i-th sample in the deviation data set, w i represents the dynamic weight corresponding to the i-th sample, and n represents the total number of samples;

[0016] Based on the optical axis offset trend fitting result and combined with the change rate of the original deviation record, the trend adjustment parameter is dynamically adjusted, and the optical axis offset trend analysis result is generated through the trend value and the target optical axis position.

[0017] As a further solution of the present invention, the step of obtaining the calibration parameter adjustment recommendation data is specifically as follows:

[0018] Extracting time series data of the optical axis offset path in a future time period from the optical axis offset trend analysis result, performing weighted difference processing on the data and the original optical axis offset data set to obtain an optical axis offset change rate matrix;

[0019] The optical axis offset change rate matrix is ​​cross-matched with the predetermined trajectory offset function, and the fitting path is optimized by residual error, using the formula:

[0020]

[0021] Calculate the optimal fitting value between the current trajectory of the optical axis and the predetermined trajectory at time t to obtain the predicted offset adjustment path of the optical axis, where ΔP k Represents the offset of the optical axis in the kth time period, Δt k represents the time difference of the kth period, P k is the current offset position of the optical axis, T k is the position of the predetermined trajectory, O1 and O2 are the weight parameters of the fitting adjustment, and f(t) represents the optimal fitting value between the current trajectory of the optical axis and the predetermined trajectory at time t;

[0022] According to the offset amount in the offset adjustment path predicted by the optical axis and combined with the adjustment parameter sensitivity of the angle adjuster, the required adjustment angle value is analyzed, and the angle value and the calibration adjustment recommendation function are superimposed and analyzed to obtain calibration parameter adjustment recommendation data.

[0023] As a further solution of the present invention, the step of obtaining the calibration adjustment control operation parameter value is specifically as follows:

[0024] Adjust the recommended data based on the calibration parameters, identify key parameter nodes, classify and organize key node data, set checkpoints for preliminary screening, verify whether each parameter is within the tolerance limit, remove data items that do not meet the standards, and build a parameter organization framework;

[0025] Based on the parameter arrangement framework, adjust the parameters category by category, subdivide the calibration range of each parameter, reset the parameter items that exceed the error range, and correct each parameter to the specified accuracy range through adjustment operations to obtain a detailed parameter adjustment list;

[0026] By means of the refined parameter adjustment list, the parameter settings in the laser device are adjusted, including the adjustment of the laser output power and the optical path direction, and the laser device is adjusted by real-time feedback to obtain calibration adjustment control operation parameter values.

[0027] As a further solution of the present invention, the steps of obtaining the optical axis adjustment execution record are specifically as follows:

[0028] Based on the angle adjuster adjustment amount and the optical axis offset parameter in the calibration adjustment control operation parameter value, the difference between the current adjustment offset data of the optical axis and the initial angular position of the optical element is calculated, the angle range of the optical element that needs to be adjusted is analyzed, and an initial plan for adjusting the angle of the optical element is established;

[0029] Based on the initial scheme for adjusting the angle of the optical element, the sensitivity parameters and adjustment step size of the laser angle adjuster are used to optimize the adjustment path of the optical element, using the formula:

[0030]

[0031] Calculate the adjustment value of the optical element angle and generate an optical element adjustment execution plan, where θ represents the adjustment value of the optical element angle, Δα is the deviation between the initial angle of the optical element and the target angle, Δβ is the deviation between the initial position of the optical element and the target position, and w1 and w2 are adjustment sensitivity weight parameters;

[0032] According to the optical element adjustment execution plan, the adjustment path of the laser angle adjuster is recorded in the optical axis log, and combined with the real-time optical axis offset correction value, an optical axis adjustment execution record is established.

[0033] As a further solution of the present invention, the steps for obtaining the adjusted optical axis data overview are specifically as follows:

[0034] Based on the optical axis adjustment execution record, the initial angle and displacement parameters of the optical axis are extracted, the angle offset values ​​in the adjustment record are compared with the target values ​​section by section using a segmented verification method, the difference range of each stage is recorded, and the cumulative deviation statistics are performed step by step to generate an optical axis offset trend table;

[0035] Based on the optical axis offset trend table, the offset value and corresponding parameters of each stage are called, the angle and displacement of the optical axis are adjusted, and the parameter superposition correction is performed on the adjustment stage to obtain the optical axis correction parameter table;

[0036] Based on the optical axis correction parameter table, the adjusted optical axis is continuously tested to measure and record the repeatability parameters and operational stability of the optical axis. Each set of test data is summarized, and the average value of each indicator in the test is statistically calculated to generate an overview of the adjusted optical axis data.

[0037] As a further solution of the present invention, the steps for obtaining the summary of the laser optical axis calibration effect are specifically as follows:

[0038] Based on the adjusted optical axis data overview, a vibration sensor is used to collect a real-time vibration signal of the alignment of the optical axis with the target optical path, an optical axis offset vector is analyzed, a main frequency characteristic parameter of the vibration signal is extracted, and an optical axis alignment characteristic parameter set is generated;

[0039] The data in the optical axis alignment characteristic parameter set is used in combination with the main frequency characteristic parameters for evaluation. The deviation between the optical axis alignment offset and the industry standard is calculated using the formula:

[0040]

[0041] Generate optical axis alignment deviation evaluation results, where P is the optical axis alignment deviation, A is the industry standard benchmark value, B is the average value of the optical axis offset vector, F is the main frequency characteristic parameter, V is the variance of the optical axis offset vector, and Q1, Q2, and Q3 are the weight adjustment coefficients of each parameter;

[0042] The optical axis alignment deviation evaluation result is analyzed for difference with the threshold range. When the evaluation result is less than the threshold, a calibration success status is recorded; otherwise, a calibration failure status is recorded to obtain a summary of the laser optical axis calibration effect.

[0043] A laser optical axis calibration method is performed based on the above-mentioned laser optical axis calibration device, comprising the following steps:

[0044] S1: Based on the real-time output data of the laser transmitter, the angular error and position offset between the current position of the optical element and the preset target are measured, each measurement result is recorded, the periodic change of the offset is analyzed, and the stability data is extracted to obtain preliminary deviation assessment data;

[0045] S2: By performing a time series analysis on the preliminary deviation assessment data, identifying the deviation trend, using a linear prediction model to predict the deviation path in the future time period, combining the original data with the real-time updated data for comparative analysis, and obtaining the optical axis deviation trend analysis results;

[0046] S3: adjusting input parameters of the angle adjuster according to the optical axis offset trend analysis result, fine-tuning the parameters, and verifying the adjusted parameters to obtain calibration parameter adjustment recommendation data;

[0047] S4: Adjust the recommended data according to the calibration parameters, adjust the laser angle and position, feedback the adjustment effect through the angle sensor, monitor each offset and correction during the adjustment process in real time, record the adjustment data, and form an optical axis adjustment execution record;

[0048] S5: Evaluate the data in the optical axis adjustment execution record using a vibration sensor, compare with industry standards, analyze the alignment accuracy and stability after the optical axis calibration, and generate a summary of the laser optical axis calibration effect.

[0049] Compared with the prior art, the advantages and positive effects of the present invention are:

[0050] In the present invention, by real-time monitoring of the output data of the laser transmitter, the instant deviation evaluation and dynamic calibration of the optical axis are realized, and the response speed and accuracy of the calibration are improved. When analyzing the optical axis offset trend, data analysis technology is used to accurately predict the offset path of the optical axis in the future time period, which not only reduces the need for over-calibration but also optimizes the long-term performance and stability of the equipment. The adoption of dynamic adjustment implementation ensures higher calibration accuracy by fine-tuning the position of the angle adjuster and optical elements, reduces energy waste and potential equipment loss caused by inaccurate calibration, and provides real-time feedback on the calibration effect evaluation monitored by the vibration sensor, making the calibration process more transparent. Operators can make decisions based on accurate data, further improving the reliability and efficiency of the calibration work. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a flow chart of the device of the present invention;

[0052] Figure 2 This is a flow chart of the optical axis offset trend analysis results in the present invention;

[0053] Figure 3 A flow chart showing recommended data for adjusting calibration parameters in the present invention;

[0054] Figure 4 A flow chart for calibrating and adjusting control operation parameter values ​​in the present invention;

[0055] Figure 5 A flowchart showing the execution record of the optical axis adjustment in the present invention;

[0056] Figure 6 A flow chart summarizing the adjusted optical axis data in the present invention;

[0057] Figure 7 Flowchart summarizing the laser optical axis calibration effect in the present invention. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0059] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0060] See also Figure 1 The present invention provides a technical solution: a laser optical axis calibration device comprising:

[0061] The optical axis offset detection module measures the deviation between the current optical element position and the preset target based on the real-time output data of the laser transmitter, including angular error and position offset, obtains preliminary deviation evaluation data, analyzes the optical axis offset trend, and generates optical axis offset trend analysis results;

[0062] The calibration parameter calculation module predicts the optical axis offset path in the future time period based on the optical axis offset trend analysis results, calculates the adjustment value of the angle adjuster, maintains the optical axis on the predetermined trajectory, obtains calibration parameter adjustment recommendation data, sets the laser calibration parameters according to the calibration parameter adjustment recommendation data, and generates calibration adjustment control operation parameter values;

[0063] The dynamic adjustment implementation module adjusts the control operating parameter values ​​based on the calibration, adjusts the laser angle adjuster, modifies the position and angle of the optical element, and adjusts the optical axis. It generates an optical axis adjustment execution record, provides feedback on the adjustment effect based on the optical axis adjustment execution record, adjusts the optical axis to the preset accuracy standard, and obtains an overview of the adjusted optical axis data.

[0064] The calibration effect evaluation module evaluates the accuracy of the optical axis calibration based on an overview of the adjusted optical axis data. It uses a vibration sensor to detect the alignment accuracy of the optical axis and the target light path, and compares it with industry standards. It verifies and records the success rate of the optical axis calibration to obtain an overview of the laser optical axis calibration effect.

[0065] The preliminary deviation assessment data includes angle error measurement value, position offset index, and environmental variable analysis; the optical axis offset trend analysis results include trend slope, historical comparison reference, and predicted offset limit; the calibration parameter adjustment recommendation data includes adjustment angle requirement, trajectory fine positioning, and effect prediction analysis; the calibration adjustment control operation parameter values ​​include precise angle adjustment, optical component position adjustment, and light intensity adjustment range; the optical axis adjustment execution record includes angle adjustment log, light intensity adjustment record, and execution time log; the overview of the adjusted optical axis data includes the optical axis position record after calibration, accuracy change analysis, and execution efficiency; the summary of the laser optical axis calibration effect includes accuracy compliance evaluation, industry standard satisfaction, and calibration success score.

[0066] See also Figure 2 , the specific steps for obtaining the optical axis offset trend analysis results are as follows:

[0067] Based on the real-time output data of the laser transmitter, the position parameter set of the optical element is extracted, including the angular coordinates and position offset. The basic deviation data of the optical element relative to the target position is determined through real-time measurement, and the preliminary deviation data of the optical axis position is obtained.

[0068] The real-time output data of the laser transmitter is based on the position parameters of the measured optical element, and the angle and position offset of the optical element relative to the target position are extracted. The obtained angle coordinate and offset data sets are compared and analyzed, and the position state of the optical element is determined by the analytical positioning method. The obtained real-time position is compared with the preset target position point by point, the deviation data is extracted and the deviation change trend is recorded. Through preliminary processing of the deviation data, it is divided into an angle error data set and a position offset data set to ensure that different types of data meet the classification requirements of subsequent calculations. The fluctuation characteristics of the deviation change are further evaluated in combination with the time series, and excessive deviations or abnormal fluctuation points are eliminated or corrected. At the same time, the mean and variance of the angle error and position offset are calculated to quantify the current deviation characteristics and obtain preliminary deviation data of the optical axis position.

[0069] Call the preliminary deviation data of the optical axis position and perform deviation trend fitting calculation in combination with real-time time series parameters using the formula:

[0070]

[0071] Calculate the optical axis offset trend value and generate the optical axis offset trend fitting result, where T t Indicates the trend value at time point t, d i Indicates the deviation value of the i-th sample in the deviation data set, w i represents the dynamic weight corresponding to the i-th sample, and n represents the total number of samples;

[0072] The benefit of the formula is that by introducing the weight parameter wi By weighting the data at different time points, the data at key time points contribute more to the calculation results, reducing the data smoothing problem caused by the ordinary mean, thereby improving the actual reliability and accuracy of the calculation;

[0073] Deviation data set d i = [0.2, 0.5, -0.1, 0.4] is obtained by real-time recording of the optical axis offset angle and position, and outliers are removed after preliminary data cleaning;

[0074] Weight parameter w i = [1, 0.8, 0.6, 1.2] determined by time series importance analysis, such as giving higher weights to recent time points, and adjusting the dynamic distribution as the deviation changes;

[0075] Substitute specific values ​​into the formula:

[0076]

[0077] The result shows that the offset trend value of the optical axis at time point t is 0.2833, which represents the weighted comprehensive trend value of the deviation. This result is directly used for subsequent trend fitting and dynamic adjustment to ensure the accuracy of trend calculation.

[0078] Based on the optical axis offset trend fitting results and the change rate of the original deviation record, the trend adjustment parameters are dynamically adjusted, and the optical axis offset trend analysis results are generated through the trend value and the target optical axis position;

[0079] The optical axis offset trend fitting result is called, combined with the historical data of the optical element, and by analyzing the difference between the change rate and the target position, the optical axis offset data in the historical records are first segmented according to the time series, and the change rate and mean of each segment are extracted. Then, the multivariate fitting method is used to analyze the relationship between the change rate and the offset trend value, and the trend fluctuation at each time point is further judged. When the fluctuation amplitude exceeds the set threshold, the weight parameter is adjusted to reduce its impact on the overall trend result. At the same time, the current trend fitting result is corrected based on the change of the slope of the fitting curve. Combined with the difference between the historical data records and the current trend value, the final trend analysis is optimized by dynamically adjusting the trend adjustment parameters to ensure that the trend calculation is consistent with the actual data, and generate the optical axis offset trend analysis result.

[0080] See also Figure 3 ,The specific steps for obtaining the calibration parameter adjustment recommended data are:

[0081] Extract the time series data of the optical axis offset path in the future time period from the optical axis offset trend analysis results, perform weighted difference processing on the data and the original optical axis offset dataset to obtain the optical axis offset change rate matrix;

[0082] Based on the results of optical axis offset trend analysis and the basic information of historical optical axis offset data sets, the time series data of the offset path are first sliced ​​and segmented. The distribution of data points after segmentation corresponds to the time interval one by one. Then, the offset increment and change rate of each data segment are calculated. The calculation results are used to generate the optical axis offset change rate matrix. Each row of the matrix represents the optical axis offset change characteristics within a time segment. The increment calculation process depends on the difference between the start and end position data points of each time period and the time difference ratio. The values ​​are filled into the corresponding positions of the matrix in turn. Each value in the matrix represents the change rate of the optical axis offset within adjacent time steps. Normalization processing is performed after ensuring the integrity of the offset data.

[0083] The optical axis offset change rate matrix is ​​cross-matched with the predetermined trajectory offset function, and the fitting path is optimized through the residual, using the formula:

[0084]

[0085] Calculate the optimal fitting value between the current trajectory of the optical axis and the predetermined trajectory at time t to obtain the predicted offset adjustment path of the optical axis, where ΔP k Represents the offset of the optical axis in the kth time period, Δt k represents the time difference of the kth period, P k is the current offset position of the optical axis, T k is the position of the predetermined trajectory, O1 and O2 are the weight parameters of the fitting adjustment, and f(t) represents the optimal fitting value between the current trajectory of the optical axis and the predetermined trajectory at time t;

[0086] The benefit of this formula is that it improves the adaptability and accuracy of the traditional residual matching calculation method by introducing multiple weight parameters O1 and O2, combining the time difference and offset position, and thus optimizes the fitting path result.

[0087] ΔP k Obtained by differential calculation, based on the start and end offset values ​​of each time segment;

[0088] Example: If the starting offset value of the kth segment is 5 and the ending offset value is 8, then ΔP k =8-5=3,Δt k is the length of the time segment, which can be obtained by the difference between time points;

[0089] Example: If the time segment starts at 2 seconds and ends at 4 seconds, then Δt k =4-2=2, offset position P k and trajectory target T k For the given data, if they are 6 and 5 respectively, the weight parameters O1 and O2 are set to 0.7 and 0.3 through optimization, and substituted into the formula:

[0090]

[0091] f(t)=|1.5+4.2-1.5|=|4.2|=4.2

[0092] The results show that the optimal fitting value between the current trajectory of the optical axis and the predetermined trajectory at time t is 4.2, and the numerical result represents the residual value of the offset matching between the current optical axis and the target.

[0093] Based on the offset amount in the offset adjustment path predicted by the optical axis and the sensitivity of the adjustment parameters of the angle adjuster, the required adjustment angle value is analyzed, and the angle value is superimposed and analyzed with the calibration adjustment recommendation function to obtain the calibration parameter adjustment recommendation data;

[0094] Through each step offset in the future offset adjustment path of the optical axis, the adjustment range and sensitivity parameters of the angle regulator are called. First, the offset adjustment value in each time segment is distributed and analyzed, and the normalized offset adjustment value is obtained through normalization calculation. The normalized offset value is then multiplied by the sensitivity parameter of the angle regulator. The dot product result represents the angle value range that the regulator needs to adjust at each step. These adjustment ranges are uniformly formatted and their mean is calculated. The mean result is checked with the maximum adjustment value range of the regulator. When the offset adjustment value exceeds the maximum adjustment range of the regulator, the adjustment path value is reallocated, and the adjustment path is gradually optimized until the offset adjustment path is completely matched with the sensitivity range. Finally, the calibration parameter adjustment recommended data is obtained by superimposing the calculation with the preset calibration adjustment function.

[0095] See also Figure 4 , the steps for obtaining the calibration adjustment control operation parameter value are as follows:

[0096] Adjust the recommended data based on the calibration parameters, identify the key nodes of the parameters, classify and organize the key node data, set checkpoints for initial screening, verify whether each parameter is within the tolerance limit, remove data items that do not meet the standards, and build a parameter sorting framework;

[0097] The key nodes are screened by the parameter importance ranking method and the key levels are divided according to the importance weight distribution. The key node data are classified and sorted. The node database is established using the classification rules and the associated parameters are adjusted with priority. Check points are set for preliminary screening. In the preliminary screening stage, an acceptable tolerance range is set for each node data. By gradually checking whether the parameter values ​​of each node meet the predetermined standard range, each parameter is verified to be within the tolerance limit. Check points are used for step-by-step recursive verification to ensure that no key nodes or redundant data items are missed, and data items that do not meet the standards are removed. By analyzing the non-compliant items one by one, the source and cause of their deviation are determined, and a parameter sorting framework is constructed. At the same time, the function of automatically recording the key attributes of the sorted parameters and classification is added. This framework can be directly used as the basic data for parameter tuning.

[0098] Based on the parameter arrangement framework, adjust the parameters category by category, subdivide the calibration range of each parameter, reset the parameter items that exceed the error range, and correct each parameter to the specified accuracy range through adjustment operations to obtain a detailed parameter adjustment list;

[0099] By setting adjustment priority rules for each category, subdividing the calibration range for each category, and adopting a step-by-step reduction of the error range, the accuracy and precision of the range are ensured, and the parameter items that exceed the error range are reset, and the deviation of each parameter is corrected to the minimum error value in the current category, the deviation is gradually reduced, and the re-calibration step after adjustment is completed. Through adjustment operations, it is ensured that the deviation adjustment does not affect the accuracy of the parameter, and each parameter is corrected to within the specified accuracy range. Each parameter after correction is classified and recorded to obtain a detailed parameter adjustment list, which contains the final adjustment value of all parameters, the error range and the correlation matrix between the adjustment values, to ensure that the list can be directly linked to the subsequent equipment settings and reduce the accumulation of deviations in multi-stage operations.

[0100] By refining the parameter adjustment list, adjusting the parameter settings in the laser equipment, including the adjustment of the laser output power and the direction of the optical path, the laser equipment is adjusted in real time to obtain the calibration adjustment control operation parameter values;

[0101] According to the parameter items in the adjustment list, the corresponding hardware controls in the laser equipment are set in sequence, including fine-tuning of the laser output power, adopting a step-by-step adjustment mode to reduce the immediate impact of the hardware load on the output, and adjusting the direction of the optical path. Real-time monitoring is set in the adjustment steps, and the angle range of the optical path adjustment is divided into refined angle intervals. After each adjustment, real-time feedback is provided to monitor the stability of the laser output power and the optical path deviation value. The accumulated deviation of the laser equipment is adjusted through real-time feedback until the parameters meet the requirements of the calibration list, and the calibration adjustment control operation parameter value is obtained. All adjusted data will be synchronized to the equipment record to ensure the traceability and consistency of subsequent operations.

[0102] See also Figure 5 The specific steps for obtaining the optical axis adjustment execution record are as follows:

[0103] Based on the angle adjuster adjustment value and the optical axis offset parameter in the calibration adjustment control operation parameter value, the difference between the current adjustment offset data of the optical axis and the initial angle position of the optical element is calculated, the angle range that the optical element needs to be adjusted is analyzed, and an initial plan for adjusting the angle of the optical element is established;

[0104] The parameters are analyzed separately, and the difference between the current optical axis offset data obtained in real time and the target optical axis position data is calculated to generate an optical axis offset vector. The offset vector is then decomposed into two components in the horizontal direction and the vertical direction to represent the change characteristics of the angular offset and position offset of the optical axis. In each direction after decomposition, the required adjustment step and adjustment path are calculated respectively. To avoid excessive or insufficient adjustment, the adjustment sensitivity parameters of the angle adjuster and the adjustment upper limit of the optical element are combined to gradually adjust the path planning to form an adjustment path table consisting of multiple fine-tuning points. The angle change and corresponding timestamp of each adjustment node are recorded in the path table. Finally, the initial scheme for the angle adjustment of the optical element is generated by integrating all path points and their adjustment characteristics.

[0105] Based on the initial scheme for adjusting the angle of the optical element, the sensitivity parameters and adjustment step size of the laser angle adjuster are used to optimize the adjustment path of the optical element using the formula:

[0106]

[0107] Calculate the adjustment value of the optical element angle and generate an optical element adjustment execution plan, where θ represents the adjustment value of the optical element angle, Δα is the deviation between the initial angle of the optical element and the target angle, Δβ is the deviation between the initial position of the optical element and the target position, and w1 and w2 are adjustment sensitivity weight parameters;

[0108] The benefit of this formula is that by simultaneously considering the offsets of both angle adjustment and position adjustment, the final adjustment path is optimized, ensuring that the adjustment value meets the accuracy requirements while avoiding over-adjustment.

[0109] Δα is the deviation between the initial angle and the target angle of the optical element, which is obtained in real time from the angle adjuster sensor. If the initial angle is 45 and the target angle is 50, then Δα = 50-45 = 5. Δβ is the deviation between the initial position and the target position of the optical element, which is measured by the position sensor. If the initial position is 20 and the target position is 30, then Δβ = 30-20 = 10. w1 and w2 are weight parameters, which are the sensitivity setting values ​​for angle adjustment and position adjustment, respectively. Referring to the response characteristics and operation priority of the device, w1 = 0.5 and w2 = 0.8 are taken. Substitute them into the formula:

[0110]

[0111] The result indicates that the angle of the optical element that needs to be adjusted is 16.01. This value is used to control the angle setting of the optical element and is updated to the adjustment operation record to ensure that the optical axis is adjusted to the optimal state.

[0112] According to the optical element adjustment execution plan, the adjustment path of the laser angle adjuster is recorded in the optical axis log, and the optical axis adjustment execution record is established in combination with the real-time optical axis offset correction value;

[0113] First, the adjustment path is segmented and analyzed. Each adjustment path is recorded in segments according to the time interval and offset change trend. At the same time, a time series adjustment record table is generated. By reading the angle change and position adjustment of each segment in the table, the cumulative adjustment of each time step is calculated in turn, and the cumulative adjustment data is gradually compared with the real-time offset correction value. If the adjustment exceeds the sensitivity range of the regulator, the subsequent adjustment data in the time series is redistributed to ensure that the adjustment path meets the executable range of the regulator. Subsequently, a set of time-angle curves are calculated based on the adjustment path and the correction value. The specific adjustment values ​​of the key adjustment points are obtained by marking the key points of the curve and mapping them with the correction values. Finally, the adjustment value and the corresponding timestamp are input into the optical axis adjustment execution record module to form an optical axis adjustment execution record.

[0114] See also Figure 6 , the steps to obtain the overview of the adjusted optical axis data are as follows:

[0115] Based on the optical axis adjustment execution record, the initial angle and displacement parameters of the optical axis are extracted. The angle offset values ​​in the adjustment record are compared with the target values ​​section by section using a segmented verification method. The difference range of each stage is recorded, and the cumulative deviation statistics are performed step by step to generate an optical axis offset trend table.

[0116] By conducting a detailed analysis of the initial state of the optical axis, the precise value of the starting angle and the initial displacement value are obtained. The angle offset value in the adjustment record is compared with the target value section by section using a segmented verification method. The record is divided into equidistant time periods or adjustment step intervals. The actual offset data in the adjustment record is extracted interval by interval and compared with the target parameter value. The difference range of each stage is recorded. When recording the difference range, it is divided into positive deviation and negative deviation. At the same time, the frequency of occurrence of each type of deviation and its distribution during the adjustment process are recorded, and step-by-step cumulative deviation statistics are performed. A step-by-step accumulation method is used to ensure the true reflection of the cumulative error, and an optical axis offset trend table is generated. This table not only contains the overall offset trend, but also contains segmented trend curves and comparison of the effects of staged adjustments, further providing data support for subsequent calibration.

[0117] Based on the optical axis offset trend table, call the offset value and corresponding parameters of each stage, adjust the angle and displacement of the optical axis, perform parameter superposition correction on the adjustment stage, and obtain the optical axis correction parameter table;

[0118] Analyze the correlation between the offset value and the optical axis adjustment operation, refine the adjustment range and derive the corresponding correction parameters through the step-by-step calculation of the parameters in each stage, adjust the angle and displacement of the optical axis, record each correction step in real time during the adjustment process, and compare the real-time recording results with the target values ​​in the trend table one by one, gradually correct the parameters that exceed the range, perform parameter superposition correction on the adjustment stage, and add an error backoff mechanism in the parameter superposition process, that is, perform step-by-step callback adjustment on some parameters with large cumulative errors to ensure that the cumulative error does not exceed the allowable range in the trend table, and obtain the optical axis correction parameter table, which contains the final value of the corrected parameters in each stage and the correction accuracy range, providing an executable standard for subsequent optical axis testing and optimization.

[0119] Based on the optical axis correction parameter table, conduct continuous operation tests on the adjusted optical axis, measure and record the repeatability parameters and operation stability of the optical axis, summarize each set of test data, calculate the average value of each indicator in the test, and generate an overview of the adjusted optical axis data;

[0120] The initial operating state of the optical axis is set according to the parameter values ​​recorded in the correction parameter table. During the test, the stability indicators and repeatability data of the optical axis during operation are recorded one by one. The fluctuation amplitude and repeatability deviation value of the optical axis in different operating stages are obtained through multiple continuous operations. The repeatability parameters and operating stability of the optical axis are measured and recorded. At the same time, the stability change curve within the differentiated operating time period is extracted, and each group of test data is summarized and divided into three categories: high stability, medium stability and low stability. The average value of each indicator in the test is statistically calculated, and the average value is compared with the operating standard to generate an overview of the adjusted optical axis data. The overview not only includes the overall trend data of the adjusted optical axis operation, but also classifies and summarizes the fluctuation range of each group of data, providing reference data for the subsequent optimization and maintenance of the optical axis operation.

[0121] See also Figure 7 The steps for obtaining the summary of the laser optical axis calibration effect are as follows:

[0122] Based on the adjusted optical axis data overview, a vibration sensor is used to collect real-time vibration signals of the alignment between the optical axis and the target optical path. The optical axis offset vector is analyzed, and the main frequency characteristic parameters of the vibration signal are extracted to generate a set of optical axis alignment characteristic parameters.

[0123] The real-time vibration signal of the optical axis aligned with the target optical path is collected by a vibration sensor. The collected vibration signal includes instantaneous amplitude, frequency component and phase information. The vibration signal is first normalized, and the amplitude value obtained from each sampling is mapped to a standardized interval for subsequent processing. The frequency with the largest amplitude in the frequency distribution is extracted as the main frequency eigenvalue. The time series signal is divided into equally spaced intervals, and the mean and standard deviation of the amplitude in each interval are calculated as the statistical features of the offset vector. A comprehensive analysis method in the time domain and frequency domain is used to extract the main offset trend in the signal. The optical axis alignment characteristics are represented by a matrix combining the main frequency eigenvalue and the statistical characteristics to generate a set of optical axis alignment feature parameters for subsequent analysis and calibration evaluation.

[0124] The data in the optical axis alignment characteristic parameter set is used in combination with the main frequency characteristic parameters for evaluation. The deviation between the optical axis alignment offset and the industry standard is calculated using the formula:

[0125]

[0126] Generate optical axis alignment deviation evaluation results, where P is the optical axis alignment deviation, A is the industry standard benchmark value, B is the average value of the optical axis offset vector, F is the main frequency characteristic parameter, V is the variance of the optical axis offset vector, and Q1, Q2, and Q3 are the weight adjustment coefficients of each parameter;

[0127] The formula is beneficial in that by introducing the main frequency characteristic parameters, the mean and variance of the offset vector, and combining them with the weight adjustment coefficient, it can quantify the contribution of different signal characteristics to the optical axis calibration accuracy, thereby improving the adaptability and accuracy of complex signals.

[0128] The average value of the vibration signal offset vector is calculated by the interval mean of the normalized amplitude signal, and its value is set to B = 0.03. The main frequency characteristic parameter is extracted by frequency domain analysis, and its value is set to F = 20. The variance of the offset vector is obtained by the square of the signal interval standard deviation, and its value is set to V = 0.0004. The industry benchmark value is assumed to be A = 0.05. The weight adjustment coefficient is selected based on the data sensitivity, and is set to Q1 = 0.4, Q2 = 0.3, and Q3 = 0.3 respectively;

[0129] Calculate the weighted contribution of each item according to the formula:

[0130] B·Q1=0.03·0.4=0.012

[0131] F·Q2=20·0.3=6

[0132]

[0133] Substitute the calculated results into the formula to calculate the optical axis alignment deviation:

[0134] P=|0.05-(0.012+6+0.02)|=|0.05-6.032|=5.982

[0135] The result shows that the comprehensive deviation value of the optical axis alignment is 5.982, which is significantly higher than the reasonable threshold, indicating that the calibration deviation is large and the calibration result does not meet the industry standard requirements, and further adjustment of the alignment accuracy is required.

[0136] Analyze the difference between the optical axis alignment deviation evaluation result and the threshold range. If the evaluation result is less than the threshold, the calibration is recorded as successful. Otherwise, the calibration is recorded as failed. The laser optical axis calibration effect summary is obtained.

[0137] Based on the comprehensive evaluation results of the optical axis alignment deviation, they are compared with the set optical axis calibration success threshold. First, the alignment deviation results in the historical calibration data records are used as input, and the reasonable threshold range is calculated through the mean and standard deviation. The real-time signal deviation value is detected using dynamic window technology to determine whether the current deviation value is less than the reasonable threshold, and the data points that meet the conditions are recorded. If the absolute difference between the real-time signal deviation value and the threshold is significantly larger, it is automatically marked as a calibration failure state. At the same time, the change trend of the deviation value in the dynamic record is analyzed to determine whether the current calibration process has reached a stable state. If the success rate is lower than the standard requirement, the optical axis position is adjusted according to the deviation result to obtain a summary of the laser optical axis calibration effect.

[0138] The laser optical axis calibration method is performed based on the above-mentioned laser optical axis calibration device, and includes the following steps:

[0139] S1: Based on the real-time output data of the laser transmitter, the angular error and position offset between the current position of the optical element and the preset target are measured, each measurement result is recorded, the periodic change of the offset is analyzed, and the stability data is extracted to obtain preliminary deviation assessment data;

[0140] S2: By performing time series analysis on the preliminary deviation assessment data, the deviation trend is identified, and the linear prediction model is used to predict the deviation path in the future time period. The original data is combined with the real-time updated data for comparative analysis to obtain the optical axis deviation trend analysis results;

[0141] S3: Based on the results of the optical axis offset trend analysis, adjust the input parameters of the angle adjuster, fine-tune the parameters, and verify the adjusted parameters to obtain recommended calibration parameter adjustment data;

[0142] S4: Adjust the recommended data according to the calibration parameters, adjust the laser angle and position, feedback the adjustment effect through the angle sensor, monitor each offset and correction in real time during the adjustment process, record the adjustment data, and form an optical axis adjustment execution record;

[0143] S5: Use a vibration sensor to evaluate the data in the optical axis adjustment execution record, compare it with industry standards, analyze the alignment accuracy and stability of the optical axis after calibration, and generate a summary of the laser optical axis calibration results.

[0144] The above are merely preferred embodiments of the present invention and do not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A laser optical axis calibration device, characterized in that: The device comprises: The optical axis offset detection module measures the deviation between the current optical element position and the preset target based on the real-time output data of the laser transmitter, including angular error and position offset, obtains preliminary deviation evaluation data, analyzes the optical axis offset trend, and generates optical axis offset trend analysis results; The calibration parameter calculation module predicts the offset path of the optical axis in a future time period based on the optical axis offset trend analysis result, calculates the adjustment value of the angle adjuster, maintains the optical axis on a predetermined trajectory, obtains calibration parameter adjustment recommendation data, sets laser calibration parameters according to the calibration parameter adjustment recommendation data, and generates calibration adjustment control operation parameter values; The dynamic adjustment implementation module adjusts the angle adjuster of the laser, modifies the position and angle of the optical element, and adjusts the optical axis based on the calibration adjustment control operating parameter value, generates an optical axis adjustment execution record, provides feedback on the adjustment effect based on the optical axis adjustment execution record, adjusts the optical axis to a preset accuracy standard, and obtains an overview of the adjusted optical axis data; The calibration effect evaluation module evaluates the accuracy of the optical axis after calibration based on the overview of the adjusted optical axis data. It detects the alignment accuracy of the optical axis and the target optical path through a vibration sensor and compares it with industry standards. It verifies and records the success rate of the optical axis calibration to obtain an overview of the laser optical axis calibration effect.

2. The laser optical axis calibration device according to claim 1, characterized in that: The steps for obtaining the optical axis deviation trend analysis result are specifically as follows: Based on the real-time output data of the laser transmitter, the position parameter set of the optical element is extracted, including the angular coordinates and position offset. The basic deviation data of the optical element relative to the target position is determined through real-time measurement, and the preliminary deviation data of the optical axis position is obtained. The preliminary deviation data of the optical axis position is called and the deviation trend fitting operation is performed in combination with the real-time time series parameters using the formula: ： Calculate the optical axis offset trend value and generate the optical axis offset trend fitting result, where: Indicates a time point The trend value of Indicates the deviation in the data set The deviation value of the sample item, Indicates the The dynamic weight corresponding to the item sample, represents the total number of samples; Based on the optical axis offset trend fitting result and combined with the change rate of the original deviation record, the trend adjustment parameter is dynamically adjusted, and the optical axis offset trend analysis result is generated through the optical axis offset trend value and the target optical axis position.

3. The laser optical axis calibration device according to claim 2, characterized in that: The steps for obtaining the calibration parameter adjustment recommendation data are specifically as follows: Extracting time series data of the optical axis offset path in a future time period from the optical axis offset trend analysis result, performing weighted difference processing on the data and the original optical axis offset data set to obtain an optical axis offset change rate matrix; The optical axis offset change rate matrix is ​​cross-matched with the predetermined trajectory offset function, and the fitting path is optimized by residual error, using the formula: : Calculate the time between the current trajectory of the optical axis and the predetermined trajectory The optimal fitting value on the optical axis is obtained to obtain the offset adjustment path predicted by the optical axis, where represents the offset of the optical axis in the kth time period, represents the time difference of the kth period, is the current offset position of the optical axis, is the predetermined trajectory position, and is the weight parameter for fitting adjustment, Indicates the time difference between the current trajectory of the optical axis and the predetermined trajectory The best fitting value on ; According to the offset amount in the offset adjustment path predicted by the optical axis and combined with the adjustment parameter sensitivity of the angle adjuster, the required adjustment angle value is analyzed, and the angle value and the calibration adjustment recommendation function are superimposed and analyzed to obtain calibration parameter adjustment recommendation data.

4. The laser optical axis calibration device according to claim 3, characterized in that: The steps for obtaining the calibration adjustment control operation parameter value are specifically as follows: Based on the calibration parameter adjustment recommendation data, identify the key nodes of the laser calibration parameters, classify and organize the key node data, set check points for preliminary screening, verify whether each laser calibration parameter is within the tolerance limit, remove data items that do not meet the standards, and build a laser calibration parameter organization framework; Based on the laser calibration parameter arrangement framework, the laser calibration parameters are adjusted category by category, the calibration range of each laser calibration parameter is subdivided, and the laser calibration parameter items that exceed the error range are reset. Through the adjustment operation, each laser calibration parameter is corrected to the specified accuracy range, and a detailed laser calibration parameter adjustment list is obtained; By refining the laser calibration parameter adjustment list, the laser calibration parameter settings in the laser device are adjusted, including the adjustment of the laser output power and the optical path direction, and the laser device is adjusted by real-time feedback to obtain the calibration adjustment control operation parameter value.

5. The laser optical axis calibration device according to claim 4, characterized in that: The steps for obtaining the optical axis adjustment execution record are specifically as follows: Based on the angle adjuster adjustment amount and the optical axis offset parameter in the calibration adjustment control operation parameter value, the difference between the current adjustment offset data of the optical axis and the initial angular position of the optical element is calculated, the angle range of the optical element that needs to be adjusted is analyzed, and an initial plan for adjusting the angle of the optical element is established; Based on the initial scheme for adjusting the angle of the optical element, the sensitivity parameters and adjustment step size of the laser angle adjuster are used to optimize the adjustment path of the optical element, using the formula: : Calculate the adjustment value of the optical element angle and generate the optical element adjustment execution plan, where: Indicates the adjustment value of the optical element angle, is the deviation between the initial angle and the target angle of the optical element, is the deviation between the initial position and the target position of the optical element, To adjust the sensitivity weight parameter; According to the optical element adjustment execution plan, the adjustment path of the laser angle adjuster is recorded in the optical axis log, and combined with the real-time optical axis offset correction value, an optical axis adjustment execution record is established.

6. The laser optical axis calibration device according to claim 5, characterized in that: The steps for obtaining the adjusted optical axis data overview are specifically as follows: Based on the optical axis adjustment execution record, the initial angle and displacement parameters of the optical axis are extracted, and the angle offset values ​​in the optical axis adjustment execution record are compared with the target values ​​section by section using a segmented verification method. The difference range of each stage is recorded, and the cumulative deviation statistics are performed step by step to generate an optical axis offset trend table; Based on the optical axis offset trend table, the offset value and corresponding parameters of each stage are called, the angle and displacement of the optical axis are adjusted, and the parameter superposition correction is performed on the adjustment stage to obtain the optical axis correction parameter table; Based on the optical axis correction parameter table, the adjusted optical axis is continuously tested to measure and record the repeatability parameters and operational stability of the optical axis. Each set of test data is summarized, and the average value of each indicator in the test is statistically calculated to generate an overview of the adjusted optical axis data.

7. The laser optical axis calibration device according to claim 6, characterized in that: The steps for obtaining the summary of the laser optical axis calibration effect are as follows: Based on the adjusted optical axis data overview, a vibration sensor is used to collect a real-time vibration signal of the alignment of the optical axis with the target optical path, an optical axis offset vector is analyzed, a main frequency characteristic parameter of the vibration signal is extracted, and an optical axis alignment characteristic parameter set is generated; The data in the optical axis alignment characteristic parameter set is used in combination with the main frequency characteristic parameters for evaluation. The deviation between the optical axis alignment offset and the industry standard is calculated using the formula: ： Generates optical axis alignment deviation evaluation results, where is the optical axis alignment deviation, The industry standard benchmark value, is the average value of the optical axis offset vector, is the main frequency characteristic parameter, is the variance of the optical axis offset vector, is the weight adjustment coefficient of each parameter; The optical axis alignment deviation evaluation result is analyzed for difference with the threshold range. When the evaluation result is less than the threshold, a calibration success status is recorded; otherwise, a calibration failure status is recorded to obtain a summary of the laser optical axis calibration effect.

8. A laser optical axis calibration method, characterized in that: The laser optical axis calibration device according to any one of claims 1 to 7 comprises the following steps: Based on the real-time output data of the laser transmitter, the angular error and position offset between the current position of the optical element and the preset target are measured, each measurement result is recorded, the periodic change of the offset is analyzed, and the stability data is extracted to obtain preliminary deviation assessment data; By performing a time series analysis on the preliminary deviation assessment data to identify the deviation trend, a linear prediction model is used to predict the deviation path in the future time period, and a comparative analysis is conducted between the original data and the real-time updated data to obtain the optical axis deviation trend analysis results; According to the optical axis offset trend analysis result, adjusting the input laser calibration parameters of the angle adjuster, fine-tuning the laser calibration parameters, and verifying the adjusted laser calibration parameters to obtain calibration parameter adjustment recommendation data; Adjust the recommended data according to the calibration parameters, adjust the laser angle and position, feedback the adjustment effect through the angle sensor, monitor each offset and correction during the adjustment process in real time, record the adjustment data, and form an optical axis adjustment execution record; The data in the optical axis adjustment execution record is evaluated using a vibration sensor, compared with industry standards, and the alignment accuracy and stability after the optical axis calibration are analyzed to generate a summary of the laser optical axis calibration effect.

Images