Remote fault monitoring method and system for automatic control of laser

Abstract

The invention relates to the technical field of program control, and particularly discloses a remote fault monitoring method and system for automatic control of a laser, and the method comprises the following three core steps: firstly, monitoring the operation states of the laser and an optical resonant cavity in real time, analyzing operation stability parameters, and analyzing and judging whether to start remote regulation or not based on a preset threshold value and an algorithm; the laser is ensured to work in an optimal state; secondly, after remote regulation and control, regulation and control effective indexes are continuously tracked, regulation and control effects are evaluated, and meanwhile, potential fault risks are screened and preliminary early warning is triggered in combination with parameter changes after regulation and control; and finally, deeply mining fault characteristic parameters to grade fault severity. According to the method, a closed-loop system from operation monitoring, regulation and control optimization to fault early warning is constructed, traditional passive maintenance is converted into active prevention, the equipment shutdown risk and the operation and maintenance cost are effectively reduced, and the intelligent management level and reliability of the laser system are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of program control, in particular to a remote fault monitoring method and system for automatic control of a laser. BACKGROUND

[0002] Under the background of wide application of laser technology, the traditional on-site maintenance mode of laser has problems such as response lag, high labor cost and inability to monitor in real time. The LAC system is connected with multiple sensors, and the data collected by the sensors are converted into TCP / IP network signals by a MOXA serial device server, and then transmitted to the LAC system. For example, the LAC system is connected with a vibration sensor, the vibration sensor is installed on a fixed support or base of the optical resonant cavity of the laser, the vibration amplitude of the optical resonant cavity of the laser is monitored in real time, combined with other sensor data, the working state of the laser is judged, and at the same time, relying on the TCP / IP protocol, instructions are sent to the built-in execution element (such as a pump power adjustment module) of the laser device through a local area network or a public network, parameter adjustment is completed, and remote fault monitoring is realized.

[0003] For example, the patent for invention with publication number CN117032035A discloses a laser management system and method thereof. The laser management system comprises an MCU and an FPGA, which are connected through SPI communication. The MCU is integrated with a first fault collection module for collecting laser fault information. The first fault collection module is connected with a storage module. The MCU is connected with an upper computer. The FPGA comprises a second fault collection module for collecting laser fault information. The second fault collection module is connected with a register module. The register module is connected with a control module.

[0004] For example, the patent for invention with publication number CN116700144A discloses a remote diagnosis method, system and equipment for laser numerical control, which belongs to the technical field of remote diagnosis. The method is used to solve the technical problems of low diagnosis efficiency and complicated maintenance work of the existing fault diagnosis system. The method comprises the following steps: constructing a fault tree of the laser numerical control machine tool according to the fault knowledge of the laser numerical control machine tool; matching layer by layer in the fault tree according to the fault symptom information to determine a preliminary fault node; performing fuzzy reasoning in all child nodes of the preliminary fault node through a fuzzy reasoning algorithm to determine a final fault node; the final fault node corresponds to a bottom event in the fault tree; and feeding back specific fault information corresponding to the bottom event to a user end to enable the user to handle the fault.

[0005] However, in the implementation of the embodiments of the present application, it is found that the above-mentioned technology at least has the following technical problems: the current LAC system adopts a one-way adjustment mode, so that the system cannot confirm whether the adjustment achieves the expected effect, and it is more difficult to cope with the dynamic changes of the device state in complex fault scenarios, resulting in poor device operation stability and low fault handling efficiency. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a remote fault monitoring method and system for automatic control of a laser, which can effectively solve the problems involved in the background art.

[0007] To achieve the above-mentioned purposes, the present application is implemented by the following technical solutions: the first aspect of the present application provides a remote fault monitoring method for automatic control of a laser, comprising: step one, monitoring the running state of the laser, simultaneously acquiring and analyzing the running stability parameters of the optical resonant cavity of the laser, and determining whether to remotely control the running process of the laser; step two, after the remote control is completed, continuously monitoring the optical resonant cavity of the laser, collecting and analyzing the effective indicators of the remote control of the optical resonant cavity of the laser, determining whether the remote control of the optical resonant cavity of the laser is effective, simultaneously acquiring the running stability coefficient improvement rate of the optical resonant cavity of the laser after the control, and thereby determining whether to perform fault early warning on the optical resonant cavity of the laser; and step three, acquiring and analyzing the fault characteristic parameters of the optical resonant cavity of the laser, thereby realizing the hierarchical early warning of the optical resonant cavity of the laser.

[0008] The second aspect of the present application provides a remote fault monitoring system for automatic control of a laser, comprising: a running monitoring and control decision module for monitoring the running state of the laser, simultaneously acquiring and analyzing the running stability parameters of the optical resonant cavity of the laser, and determining whether to remotely control the running process of the laser; a control effect evaluation and fault preliminary judgment module for continuously monitoring the optical resonant cavity of the laser after the remote control is completed, collecting and analyzing the effective indicators of the remote control of the optical resonant cavity of the laser, determining whether the remote control of the optical resonant cavity of the laser is effective, simultaneously acquiring the running stability coefficient improvement rate of the optical resonant cavity of the laser after the control, and thereby determining whether to perform fault early warning on the optical resonant cavity of the laser; and a fault characteristic analysis and hierarchical early warning module for acquiring and analyzing the fault characteristic parameters of the optical resonant cavity of the laser, thereby realizing the hierarchical early warning of the optical resonant cavity of the laser.

[0009] Compared with the prior art, the embodiments of the present application have at least the following advantages or beneficial effects: (1) The present application provides a remote fault monitoring method and system for automatic control of a laser, which realizes intelligent management of the optical resonant cavity of the laser through a closed-loop process of monitoring, regulation, evaluation and early warning, from real-time monitoring and regulation decision-making of the operating state, to accurate evaluation and preliminary judgment of the regulation effect, to deep analysis and hierarchical early warning of fault characteristics, each link is closely linked and progressive; not only can it actively optimize the resonant cavity operating parameters to ensure stable and efficient output of the laser, but also can discover potential faults in advance through multi-dimensional data analysis, change post-maintenance to pre-prevention, significantly reduce equipment downtime risk and operation and maintenance cost, and improve the reliability and intelligent level of the laser system.

[0010] (2) The operation monitoring and regulation decision-making module can quickly determine whether the laser deviates from the optimal operating state and timely decide whether to start remote regulation by real-time acquisition of key operating parameters of the laser and optical resonant cavity, construction of a comprehensive operating state perception network, and analysis based on preset threshold and intelligent algorithm. This active intervention mechanism effectively avoids performance degradation or equipment damage caused by abnormal parameters, ensures that the laser is always in an efficient and stable working state, and lays a solid data foundation for subsequent regulation and early warning.

[0011] (3) After remote regulation, the regulation effective indicators of the optical resonant cavity are continuously tracked, and the actual effect of the regulation measures is objectively evaluated to prevent resource waste or performance deterioration caused by ineffective regulation. At the same time, in combination with the operating state change parameters after regulation, early fault signs can be captured to realize preliminary screening and early warning of faults. This linkage mechanism of "regulation-evaluation-prediction" not only ensures the accuracy of the regulation strategy, but also significantly improves the timeliness of fault early warning, effectively reducing the probability of fault occurrence.

[0012] (4) The fault characteristic analysis and hierarchical early warning module can scientifically classify the severity of faults by deeply mining the fault characteristic parameters of the optical resonant cavity, from slight performance degradation to urgent equipment failure. Different levels of early warning information can guide maintenance personnel to take differentiated treatment measures to avoid excessive maintenance or response lag. This fine hierarchical early warning mechanism significantly improves fault handling efficiency, optimizes operation and maintenance resource allocation, and maximizes the reduction of production interruptions caused by faults. BRIEF DESCRIPTION OF DRAWINGS

[0013] The present application is further illustrated by the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present application. For ordinary skilled persons in the art, other drawings can be obtained without creative labor on the basis of the following drawings.

[0014] Figure 1 The present application is further illustrated by the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present application. For ordinary skilled persons in the art, other drawings can be obtained without creative labor on the basis of the following drawings.

[0015] Figure 2 A schematic diagram of a system module connection of the present application.

[0016] Figure 3 A schematic diagram of a method step flow for operation monitoring and control decision of a laser optical resonator cavity of the present application.

[0017] Figure 4 A schematic diagram of a method step flow for remote control of a laser optical resonator cavity of the present application.

[0018] Figure 5 A schematic diagram of a step flow for whether to perform fault early warning on a remote control result of the present application.

[0019] Figure 6 A schematic diagram of a step flow for fault early warning of a laser optical resonator cavity of the present application. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0021] Referring to Figure 1 As shown in the drawings, the present application provides a remote fault monitoring method for automatic control of a laser, comprising: step one, monitoring the running state of the laser, simultaneously acquiring and analyzing the running stability parameters of a laser optical resonator cavity, and determining whether to perform remote control on the running process of the laser; step two, after the remote control is completed, continuously monitoring the laser optical resonator cavity, collecting and analyzing the effective indexes of the remote control of the laser optical resonator cavity, determining whether the remote control of the laser optical resonator cavity is effective, simultaneously acquiring the running stability coefficient improvement rate of the laser optical resonator cavity after the control, and thereby determining whether to perform fault early warning on the laser optical resonator cavity; and step three, acquiring and analyzing the fault characteristic parameters of the laser optical resonator cavity, and thereby realizing the hierarchical early warning of the laser optical resonator cavity.

[0022] The application uses LRC laser automatic control software, LRC is a software capable of realizing laser remote control, and its main functions include: remote operation of equipment, monitoring of real-time state of equipment and daily automatic backup of laser configuration; the LAC system (a software for remote control and monitoring of laser equipment) is connected with the MOXA equipment through the TCP / IP protocol, and the MOXA equipment (serial equipment server) is connected with the laser through the RS232 serial communication, wherein TCP / IP represents that the computer performs remote management on the laser through wired (such as network cable) or wireless (such as WiFi) mode with the help of a local area network or a public network; RS232 refers to an interface standard for serial data communication, which is used for realizing short-distance data transmission between devices.

[0023] Specifically, the running stability parameters of the optical resonant cavity of the laser are acquired and analyzed, and the specific analysis process is as follows: the running stability parameters of the optical resonant cavity of the laser include a mode volume factor of the optical resonant cavity, a cavity temperature gradient factor of the optical resonant cavity and a vibration spectrum energy factor of the optical resonant cavity.

[0024] It should be explained that the mode volume factor represents the deviation degree between the mode volume of the optical resonant cavity in the first period and the reference mode volume; the cavity temperature gradient factor represents the proportional relationship between the cavity temperature gradient of the optical resonant cavity in the first period and the defined cavity temperature gradient; and the vibration spectrum energy factor represents the proportional relationship between the vibration spectrum energy of the optical resonant cavity in the first period and the defined vibration spectrum energy.

[0025] The influence degree of the mode volume factor, the cavity temperature gradient factor and the vibration spectrum energy factor on the running stability coefficient of the optical resonant cavity is quantified by introducing the influence coefficient from the control database, and various degrees are coupled, so as to obtain the running stability coefficient of the optical resonant cavity of the laser in the first period; the running stability coefficient of the optical resonant cavity of the laser in the first period represents the stability degree when the optical resonant cavity runs in the first period, and the specific evaluation mode is as follows: ; ; ; ; In the formula, is the running stability coefficient of the optical resonant cavity of the laser in the first period, is the mode volume factor of the optical resonant cavity, is the mode volume of the optical resonant cavity in the first period, is the reference mode volume preset in the control database, is the cavity temperature gradient factor of the optical resonant cavity, a cavity temperature gradient of the optical resonator in the first period, a preset defined cavity temperature gradient in the control database, a vibration spectrum energy factor of the optical resonator, a vibration spectrum energy of the optical resonator in the first period, a preset defined vibration spectrum energy in the control database, an influence force coefficient corresponding to a preset mode volume factor in the control database, an influence force coefficient corresponding to a preset cavity temperature gradient factor in the control database, an influence force coefficient corresponding to a preset vibration spectrum energy factor in the control database.

[0026] It needs to be explained that the above-mentioned mode volume represents the spatial volume occupied by the electromagnetic field energy of a certain specific mode (usually the fundamental mode) in the laser resonator. The resonator model is established by using optical simulation software (such as COMSOL multiphysics simulation software), the cavity mirror parameters and the gain distribution of the working substance are input, and the mode volume is directly simulated and output. The above-mentioned cavity temperature gradient represents the difference in the spatial temperature distribution of each component of the resonator. The two-dimensional temperature field distribution image can be obtained by using an infrared thermal imager, and the temperature difference between any two points can be analyzed by using a thermal imager software (such as an Arite thermal imaging software), and the spatial temperature gradient can be calculated by combining the pixel spacing. The above-mentioned vibration spectrum energy represents the energy distribution of each frequency component in the frequency domain of the vibration signal. The vibration signal can be collected by a vibration sensor, and the energy distribution of each frequency component can be obtained by analyzing and processing the signal after signal conditioning by a spectrum analyzer (such as a Fourier transform algorithm).

[0027] The above-mentioned reference mode volume represents the reference value of the mode volume; the above-mentioned defined cavity temperature gradient represents the maximum value allowed by the cavity temperature gradient; and the above-mentioned defined vibration spectrum energy represents the maximum value allowed by the vibration spectrum energy.

[0028] The influence coefficient corresponding to the mode volume factor represents the influence degree of a unit value of the mode volume on the operation stability coefficient; the influence coefficient corresponding to the cavity temperature gradient factor represents the influence degree of a unit value of the cavity temperature gradient on the operation stability coefficient; the influence coefficient corresponding to the vibration spectrum energy factor represents the influence degree of a unit value of the vibration spectrum energy on the operation stability coefficient; the control database stores the mapping relationship of the mode volume factor and the influence coefficient corresponding thereto, the mapping relationship of the cavity temperature gradient factor and the influence coefficient corresponding thereto, and the mapping relationship of the vibration spectrum energy factor and the influence coefficient corresponding thereto; for example, the mode volume factor, the cavity temperature gradient factor and the vibration spectrum energy factor are input into the control database, and the control database can match the influence coefficient corresponding to the mode volume factor, the influence coefficient corresponding to the cavity temperature gradient factor and the influence coefficient corresponding to the vibration spectrum energy factor; the influence coefficient corresponding to the mode volume factor, the influence coefficient corresponding to the cavity temperature gradient factor and the influence coefficient corresponding to the vibration spectrum energy factor all have a value range of 0 to 1.

[0029] The temperature gradient changes the cavity geometry and material properties through thermal expansion or contraction, directly affects the mode volume, and at the same time causes thermal stress to induce structural vibration, changing the distribution of vibration spectrum energy (such as natural frequency shift); the high frequency component in the vibration spectrum energy is converted into heat energy through friction, damping and other mechanisms, aggravating the temperature gradient inside the cavity, while the structural micro-deformation caused by vibration will react on the mode volume (such as the change of cavity boundary conditions leading to mode detuning); the change of mode volume (such as the reduction of laser cavity mode volume) may affect the energy deposition distribution through the light-heat effect, indirectly modulating the temperature gradient, while the mode competition or coupling process may excite structural vibration, changing the frequency component of vibration energy.

[0030] The mode volume factor reflects the deviation degree of the actual mode volume from the reference value, the greater the deviation, the more significant the deviation of the light field distribution (such as the mode matching degree) in the optical resonant cavity from the ideal state, leading to mode competition, energy leakage or mode distortion, causing output power fluctuation, beam quality degradation, and thus reducing the operation stability coefficient; the greater the temperature gradient factor, the more significant the non-uniformity of thermal expansion or contraction of the cavity material, which will destroy the phase matching condition of the resonant cavity, causing frequency drift or mode jump, and thus reducing the operation stability coefficient; the greater the vibration spectrum energy factor, the more significant the influence of mechanical disturbance on the resonant cavity, and thus reducing the operation stability coefficient.

[0031] Specifically, whether to remotely regulate and control the operation process of the laser is judged, and the specific judgment process is as follows: The running stability coefficient of the laser optical resonant cavity in the first period is compared with the running stability threshold of the laser optical resonant cavity; if the running stability coefficient of the laser optical resonant cavity in the first period is greater than or equal to the running stability threshold of the laser optical resonant cavity, it is judged that remote regulation and control of the running process of the laser is not needed; if the running stability coefficient of the laser optical resonant cavity in the first period is less than the running stability threshold of the laser optical resonant cavity, it is judged that remote regulation and control of the running process of the laser is needed.

[0032] It needs to be explained that the running stability threshold of the laser optical resonant cavity represents the minimum value of the running stability coefficient allowed in the control database.

[0033] Further, the running process of the laser is remotely regulated and controlled, and the specific regulation and control process is: based on the running stability coefficient of the laser optical resonant cavity in the first period and the running stability threshold of the laser optical resonant cavity, the running stability deviation value of the laser optical resonant cavity in the first period is obtained, and the running stability deviation value of the laser optical resonant cavity in the first period is compared with the running stability deviation threshold of the laser optical resonant cavity.

[0034] The above-mentioned obtaining of the running stability deviation value of the laser optical resonant cavity in the first period refers to subtracting the running stability threshold of the laser optical resonant cavity from the running stability coefficient of the laser optical resonant cavity in the first period, and then processing the result with the running stability threshold of the laser optical resonant cavity. The final result is the running stability deviation value of the laser optical resonant cavity in the first period; the running stability deviation threshold of the laser optical resonant cavity represents the maximum running stability deviation value allowed in the control database.

[0035] If the running stability deviation value of the laser optical resonant cavity in the first period is less than the running stability deviation threshold of the laser optical resonant cavity, the pump power reduction coefficient is matched from the control database based on the running stability deviation value of the laser optical resonant cavity in the first period, so as to reduce the pump power.

[0036] The above-mentioned matching of the pump power reduction coefficient from the control database based on the running stability deviation value of the laser optical resonant cavity in the first period has a specific matching process: the control database stores the pump power reduction coefficient corresponding to each running stability deviation value interval. The obtained running stability deviation value is input into the control database, and the control database can match the corresponding running stability deviation value interval. The pump power reduction coefficient corresponding to the interval is the required reduction coefficient. The obtained pump power reduction coefficient is multiplied by the original pump power, and the result is the pump power that needs to be adjusted to; the above-mentioned pump power reduction coefficient is less than 1, which represents the proportion of the pump power that needs to be reduced.

[0037] If the operation stability deviation value of the laser optical resonant cavity in the first period is greater than or equal to the operation stability deviation threshold value of the laser optical resonant cavity, the laser operation power reduction coefficient is matched from the control database based on the operation stability deviation value of the laser optical resonant cavity in the first period, so as to reduce the laser operation power, and the emergency warning information is pushed to the operation and maintenance platform.

[0038] It should be explained that the above-mentioned emergency warning information includes the specific time of emergency warning triggering, the operation stability deviation value, etc.; the above-mentioned first period refers to the time length for studying the operation stability of the laser optical resonant cavity, and the specific period length is determined by the relevant technical personnel; the laser operation power reduction coefficient is matched from the control database based on the operation stability deviation value of the laser optical resonant cavity in the first period, and the specific matching process is as follows: the control database stores the laser operation power reduction coefficient corresponding to each operation stability deviation value interval, the obtained operation stability deviation value is input into the control database, the control database can match the corresponding operation stability deviation value interval, and then the laser operation power reduction coefficient corresponding to the interval is the required reduction coefficient. The laser operation power reduction coefficient obtained is multiplied by the original laser operation power, and the result obtained is the laser operation power that needs to be adjusted; the laser operation power reduction coefficient is less than 1, indicating that the laser operation power needs to be reduced by a certain proportion.

[0039] Specifically, the effective indicators of the remote control of the laser optical resonant cavity are collected and analyzed, and the specific analysis process is as follows: the effective indicators of the remote control of the laser optical resonant cavity include the cavity loss difference factor of the optical resonant cavity, the cavity vibration amplitude factor of the optical resonant cavity, and the beam quality factor of the optical resonant cavity; the operation stability coefficient of the laser optical resonant cavity in the second period is obtained.

[0040] It should be explained that the above-mentioned cavity loss difference factor represents the deviation degree between the cavity loss difference value of the optical resonant cavity in the second period and the reference cavity loss difference value; the above-mentioned cavity vibration amplitude factor represents the proportional relationship between the cavity vibration amplitude of the optical resonant cavity in the second period and the defined cavity vibration amplitude; and the above-mentioned beam quality factor represents the deviation degree between the beam quality of the optical resonant cavity in the second period and the reference quality.

[0041] The influence coefficient is introduced from the control database to respectively quantify the influence degree of the cavity loss difference factor, the cavity vibration amplitude factor and the beam quality factor on the remote control effective index, and the running stability coefficient of the laser optical resonant cavity in the second period is quantified by the influence coefficient to quantify the influence degree of the running stability coefficient of the laser optical resonant cavity in the second period on the remote control effective index, various degrees are coupled, and the remote control effective index of the laser optical resonant cavity in the second period is obtained; The remote control effective index of the laser optical resonant cavity in the second period indicates that in the second period after the laser optical resonant cavity is remotely controlled, the degree of reaching the preset target in the control database, and the specific evaluation method is: ; ; ; ; In the formula, is the remote control effective index of the laser optical resonant cavity in the second period, is the running stability coefficient of the laser optical resonant cavity in the second period, is the cavity loss difference factor of the optical resonant cavity, is the cavity loss difference of the optical resonant cavity in the second period, is the preset reference cavity loss difference in the control database, is the cavity vibration amplitude factor of the optical resonant cavity, is the cavity vibration amplitude of the optical resonant cavity in the second period, is the preset cavity vibration amplitude in the control database, is the beam quality factor of the optical resonant cavity, is the beam quality of the optical resonant cavity in the second period, is the preset reference beam quality in the control database, is the influence coefficient corresponding to the preset cavity loss difference factor in the control database, is the influence coefficient corresponding to the preset cavity vibration amplitude factor in the control database, is the influence coefficient corresponding to the preset beam quality factor in the control database, is the control influence coefficient corresponding to the preset running stability coefficient in the control database.

[0042] It needs to be explained that the above cavity loss difference represents the difference in the degree of light energy attenuation at different modes or different positions, which can be obtained by the ring-down cavity method; the above cavity vibration amplitude represents the maximum displacement of the cavity (or the cavity mirror) from the equilibrium position during mechanical vibration, which can be obtained by laser interference method; the above beam quality represents the focusing ability, energy concentration degree and transmission characteristics of the laser beam, which can be obtained by the beam parameter analyzer.

[0043] The above reference cavity loss difference represents the reference value of the cavity loss difference; the above defined cavity vibration amplitude represents the maximum value allowed by the cavity vibration amplitude; the above reference beam quality represents the reference value of the beam quality.

[0044] The influence coefficient corresponding to the cavity loss difference factor represents the influence degree of the unit numerical change of the cavity loss difference on the remote control effective index; the influence coefficient corresponding to the cavity vibration amplitude factor represents the influence degree of the unit numerical change of the cavity vibration amplitude on the remote control effective index; the influence coefficient corresponding to the beam quality factor represents the influence degree of the unit numerical change of the beam quality on the remote control effective index; the control influence coefficient corresponding to the running stability coefficient represents the influence degree of the unit numerical change of the running stability coefficient on the remote control effective index; the control database stores the mapping relationship between the cavity loss difference factor and its corresponding influence coefficient, the mapping relationship between the cavity vibration amplitude factor and its corresponding influence coefficient, the mapping relationship between the beam quality factor and its corresponding influence coefficient, and the mapping relationship between the running stability coefficient and its corresponding control influence coefficient; for example, by inputting the cavity loss difference factor, the cavity vibration amplitude factor, the beam quality factor and the running stability coefficient into the control database, the control database can match the influence coefficient corresponding to the cavity loss difference factor, the influence coefficient corresponding to the cavity vibration amplitude factor, the influence coefficient corresponding to the beam quality factor and the control influence coefficient corresponding to the running stability coefficient; the influence coefficient corresponding to the cavity loss difference factor, the influence coefficient corresponding to the cavity vibration amplitude factor, the influence coefficient corresponding to the beam quality factor and the control influence coefficient corresponding to the running stability coefficient all have a value range between 0 and 1.

[0045] If the cavity vibration amplitude of the laser is large, it will cause the cavity mirror to shake, resulting in an increase in the cavity loss. At the same time, the vibration will also make the laser beam unstable, and the beam quality will deteriorate, and the focusing effect and energy concentration degree will decrease; the larger the cavity loss difference, the more energy loss during the transmission of the laser in the resonant cavity, and the more energy loss, the more chaotic the laser mode, the fewer the fundamental modes, and the lower the beam quality; moreover, the loss is unstable, and the laser output power will also fluctuate, and the running stability coefficient will decrease; the poor beam quality, such as inaccurate focusing, cannot guarantee stable effect in actual use (such as laser cutting), and the running stability coefficient also decreases; The greater the difference in cavity loss factor, the more energy is wasted inside the laser, and the more difficult it is to adjust it to the ideal state by remote control, thereby reducing the effective index of remote control; the greater the vibration amplitude of the cavity, the more unstable the laser, thereby reducing the effective index of remote control; the greater the beam quality factor, the more difficult it is to correct it to a high-quality state by remote control, thereby reducing the effective index of remote control; the higher the running stability coefficient, the better the state of the laser itself, and the better the effect of remote control.

[0046] Further, whether the remote control of the laser optical resonant cavity is effective is judged by comparing the effective index of remote control of the laser optical resonant cavity in the second period with the effective threshold of remote control.

[0047] The above-mentioned effective threshold of remote control refers to the minimum value of the effective index of remote control allowed in the control database; the above-mentioned second period refers to the time length for studying the effective index of remote control of the laser, and the specific period length is determined by relevant technical personnel.

[0048] If the effective index of remote control of the laser optical resonant cavity in the second period is greater than or equal to the effective threshold of remote control, it is judged that the remote control of the laser optical resonant cavity is effective; if the effective index of remote control of the laser optical resonant cavity in the second period is less than the effective threshold of remote control, it is judged that the remote control of the laser optical resonant cavity is ineffective, and the process of remote control of the laser optical resonant cavity is adjusted, and the specific adjustment process is: obtaining the proportion of high-order modes of the laser optical resonant cavity in the second period, and comparing the proportion of high-order modes of the laser optical resonant cavity in the second period with the threshold of the proportion of high-order modes.

[0049] The above-mentioned proportion of high-order modes represents the proportion of the energy of "high-order modes" in the total energy of the laser beam, which can be obtained by a beam quality analysis instrument (such as a photodetector array); the above-mentioned threshold of the proportion of high-order modes represents the maximum value of the proportion of high-order modes allowed in the control database.

[0050] If the proportion of high-order modes of the laser optical resonant cavity in the second period is greater than the threshold of the proportion of high-order modes, the deviation value of the proportion of high-order modes of the laser optical resonant cavity in the second period is obtained based on the proportion of high-order modes of the laser optical resonant cavity in the second period and the threshold of the proportion of high-order modes, and the aperture reduction coefficient is matched from the control database based on the deviation value of the proportion of high-order modes of the laser optical resonant cavity in the second period, thereby reducing the light transmission aperture of the mode selection diaphragm in the optical resonant cavity.

[0051] The high-order mode proportion deviation value of the laser optical resonant cavity in the second period is obtained by subtracting the high-order mode proportion threshold from the high-order mode proportion of the laser optical resonant cavity in the second period, taking the absolute value of the processing result, and then performing ratio processing on the high-order mode proportion threshold. The final result is the high-order mode proportion deviation value of the laser optical resonant cavity in the second period. The light transmission aperture reduction coefficient is matched from the control database based on the high-order mode proportion deviation value of the laser optical resonant cavity in the second period. The specific matching process is as follows: the control database stores the light transmission aperture reduction coefficients corresponding to each high-order mode proportion deviation value interval. The obtained high-order mode proportion deviation value is input into the database. The control database can match the corresponding high-order mode proportion deviation value interval. The light transmission aperture reduction coefficient corresponding to the interval is the required reduction coefficient. Multiply the original light transmission aperture by the light transmission aperture reduction coefficient. The result is the size of the light transmission aperture that needs to be adjusted.

[0052] If the high-order mode proportion of the laser optical resonant cavity in the second period is less than or equal to the high-order mode proportion threshold, the gain medium shortening coefficient is matched from the control database based on the high-order mode proportion deviation value of the laser optical resonant cavity in the second period. Thus, the gain medium length is reduced, the spatial hole burning effect is reduced, and the high-order mode competition is reduced.

[0053] It should be explained that the gain medium shortening coefficient is matched from the control database based on the high-order mode proportion deviation value of the laser optical resonant cavity in the second period. The specific matching process is as follows: the control database stores the gain medium shortening coefficients corresponding to each high-order mode proportion deviation value interval. The obtained high-order mode proportion deviation value is input into the database. The control database can match the corresponding high-order mode proportion deviation value interval. The gain medium shortening coefficient corresponding to the interval is the required shortening coefficient. Multiply the original gain medium by the gain medium shortening coefficient. The result is the size of the gain medium that needs to be adjusted. The gain medium shortening coefficient is less than 1, indicating that the gain medium needs to be reduced.

[0054] Further, it is determined whether to perform fault warning on the laser optical resonant cavity. The specific analysis process is as follows: based on the running stability coefficient of the laser optical resonant cavity in the first period and the running stability coefficient of the laser optical resonant cavity in the second period, the running stability coefficient improvement rate of the laser optical resonant cavity in the second period is obtained. The running stability coefficient improvement rate of the laser optical resonant cavity in the second period is compared with the laser optical resonant cavity running stability coefficient improvement rate threshold.

[0055] The operation stability coefficient improvement rate of the laser optical resonant cavity in the second period refers to dividing the operation stability coefficient of the laser optical resonant cavity in the second period by the operation stability coefficient of the laser optical resonant cavity in the first period, and then percentage processing the result, and finally obtaining the result, which is the operation stability coefficient improvement rate of the laser optical resonant cavity in the second period. The laser optical resonant cavity operation stability coefficient improvement rate threshold refers to the minimum value of the optical resonant cavity operation stability coefficient improvement rate allowed in the control database.

[0056] If the operation stability coefficient improvement rate of the laser optical resonant cavity in the second period is greater than or equal to the laser optical resonant cavity operation stability coefficient improvement rate threshold, it is determined that no fault warning is given to the laser optical resonant cavity. If the operation stability coefficient improvement rate of the laser optical resonant cavity in the second period is less than the laser optical resonant cavity operation stability coefficient improvement rate threshold, it is determined that a fault warning is given to the laser optical resonant cavity.

[0057] The fault warning of the laser optical resonant cavity refers to pushing the fault warning information to the operation and maintenance platform. The fault warning information includes the specific time of triggering the fault warning, the operation stability coefficient improvement rate, etc.

[0058] Specifically, the fault characteristic parameters of the laser optical resonant cavity are obtained and analyzed. The specific analysis process is as follows: the fault characteristic parameters of the laser optical resonant cavity include the cavity mirror reflectivity drop rate factor and the wavelength drift amount factor of the optical resonant cavity.

[0059] It should be explained that the cavity mirror reflectivity drop rate factor represents the proportional relationship between the cavity mirror reflectivity drop rate of the optical resonant cavity in the third period and the defined cavity mirror reflectivity drop rate. The wavelength drift amount factor represents the proportional relationship between the wavelength drift amount of the optical resonant cavity in the third period and the defined wavelength drift amount.

[0060] The operation stability coefficient of the laser optical resonant cavity in the third period and the remote control effective index of the laser optical resonant cavity in the third period are obtained. The influence coefficient is introduced from the control database to quantize the influence degree of the cavity mirror reflectivity drop rate factor and the wavelength drift amount factor on the optical resonant cavity fault warning index, and at the same time, the influence degree of the operation stability coefficient of the laser optical resonant cavity in the third period and the remote control effective index of the laser optical resonant cavity in the third period on the optical resonant cavity fault warning index is quantized by the influence coefficient. Coupling various degrees to obtain the fault warning index of the laser optical resonant cavity in the third period.

[0061] The fault warning index of the laser optical resonant cavity in the third period represents the emergency degree of the fault of the optical resonant cavity in the third period, and the specific evaluation method is as follows: ; ; ; In the formula, is the failure early warning index of the optical resonant cavity of the laser in the third period, is the remote control effective index of the optical resonator of the laser in the third period, is the operation stability coefficient of the optical resonator of the laser in the third period, is the cavity mirror reflectivity decline rate factor of the optical resonator, is the cavity mirror reflectivity decline rate of the optical resonator in the third period, is the preset defined cavity mirror reflectivity decline rate in the control database, is the wavelength shift amount factor of the optical resonator, is the wavelength shift amount of the optical resonator in the third period, is the preset defined wavelength shift amount in the control database, is the influence coefficient corresponding to the cavity mirror reflectivity decline rate factor preset in the control database, is the influence coefficient corresponding to the wavelength shift amount factor preset in the control database, is the failure influence coefficient corresponding to the remote control effective index preset in the control database, is the failure influence coefficient corresponding to the operation stability coefficient preset in the control database.

[0062] It needs to be explained that the above-mentioned cavity mirror reflectivity decline rate represents the decay speed of the reflectivity of the mirror (cavity mirror) in the laser resonator with time or the number of uses, which can be obtained by using a spectral reflectivity measuring instrument combined with an optical path switching device; the above-mentioned wavelength shift amount represents the deviation value of the actual output wavelength of the laser or optical signal from the theoretically designed wavelength (or initial wavelength), which can be obtained by a spectral analyzer (such as a grating spectrometer).

[0063] The above-mentioned defined cavity mirror reflectivity decline rate represents the maximum value allowed by the cavity mirror reflectivity decline rate; the above-mentioned defined wavelength shift amount represents the maximum value allowed by the wavelength shift amount.

[0064] The influence coefficient corresponding to the cavity mirror reflectivity drop rate factor represents the influence degree of a unit value of the cavity mirror reflectivity drop rate on the fault early warning index; the influence coefficient corresponding to the wavelength shift amount factor represents the influence degree of a unit value of the wavelength shift amount on the fault early warning index; the fault influence coefficient corresponding to the remote regulation effective index represents the influence degree of a unit value of the remote regulation effective index on the fault early warning index; the fault influence coefficient corresponding to the operation stability coefficient represents the influence degree of a unit value of the operation stability coefficient on the fault early warning index; the control database stores the mapping relationship between the cavity mirror reflectivity drop rate factor and the influence coefficient corresponding thereto, the mapping relationship between the wavelength shift amount factor and the influence coefficient corresponding thereto, the mapping relationship between the remote regulation effective index and the fault influence coefficient corresponding thereto, and the mapping relationship between the operation stability coefficient and the fault influence coefficient corresponding thereto; for example, the cavity mirror reflectivity drop rate factor, the wavelength shift amount factor, the remote regulation effective index, and the operation stability coefficient are input into the control database, and the control database can match the influence coefficient corresponding to the cavity mirror reflectivity drop rate factor, the influence coefficient corresponding to the wavelength shift amount factor, the fault influence coefficient corresponding to the remote regulation effective index, and the fault influence coefficient corresponding to the operation stability coefficient; the influence coefficient corresponding to the cavity mirror reflectivity drop rate factor, the influence coefficient corresponding to the wavelength shift amount factor, the fault influence coefficient corresponding to the remote regulation effective index, and the fault influence coefficient corresponding to the operation stability coefficient all have a value range of 0 to 1.

[0065] The cavity mirror reflectivity drop indicates that the light reflection is less and less, which leads to an increase in the temperature inside the laser, thereby increasing the wavelength shift amount of the laser; the cavity mirror reflectivity drop leads to unstable laser energy, which results in poor laser power and quality, and thus the operation stability coefficient is low; the greater the wavelength shift, the lower the cavity resonance efficiency, thereby resulting in a decrease in the operation stability coefficient; the greater the remote regulation effective index, the more effective the regulation, and the higher the operation stability coefficient.

[0066] The greater the cavity mirror reflectivity drop rate factor, the faster the cavity mirror reflectivity drops than expected, the energy loss in the cavity is intensified, and the laser is prone to problems such as insufficient power and unstable mode, thereby increasing the fault early warning index; the greater the wavelength shift amount factor, the more the laser wavelength deviates from the standard value, which leads to the laser being unable to meet the specific application requirements, such as communication signal transmission errors and poor material processing effects, thereby increasing the fault early warning index; the greater the operation stability coefficient, the more stable the laser works, and the less likely the laser is to malfunction; the smaller the remote regulation effective index, the more difficult it is for remote regulation to improve the laser condition, and the more likely the problem is to accumulate and cause a fault, thereby increasing the early warning index.

[0067] Specifically, the hierarchical early warning of the laser optical resonant cavity is specifically analyzed as follows: the fault early warning index of the laser optical resonant cavity in the third period is compared with the first early warning index and the second early warning index.

[0068] The first early warning index refers to the value in the control database for judging no early warning and critical fault early warning of the laser optical resonant cavity; the second early warning index refers to the value in the control database for judging critical fault early warning and out-of-control early warning of the laser optical resonant cavity; it should be noted that the first early warning index is less than the second early warning index; the third period refers to the time length for studying the fault early warning index of the laser, and the specific period length is determined by the relevant technical personnel.

[0069] If the fault early warning index of the laser optical resonant cavity in the third period is less than the first early warning index, no early warning is needed; if the fault early warning index of the laser optical resonant cavity in the third period is greater than or equal to the first early warning index and less than or equal to the second early warning index, critical fault early warning information is pushed to the operation and maintenance platform, and a first early warning deviation value of the laser optical resonant cavity in the third period is obtained based on the fault early warning index of the laser optical resonant cavity in the third period and the first early warning index; a pump power secondary reduction coefficient is matched from the control database based on the first early warning deviation value of the laser optical resonant cavity in the third period, the pump power is further reduced, and a cavity mirror angle fine tuning instruction is generated.

[0070] The critical fault early warning information includes the specific time of triggering the critical fault early warning, the first early warning deviation value, etc.; the first early warning deviation value of the laser optical resonant cavity in the third period is obtained by subtracting the fault early warning index of the laser optical resonant cavity in the third period from the first early warning index; the processing result is further processed by ratio, and the final result is the first early warning deviation value of the laser optical resonant cavity in the third period; the pump power secondary reduction coefficient is matched from the control database based on the first early warning deviation value of the laser optical resonant cavity in the third period, and the specific matching process is as follows: the control database stores the pump power secondary reduction coefficient corresponding to each first early warning deviation value interval, the obtained first early warning deviation value is input into the control database, the control database can match the corresponding first early warning deviation value interval, and the pump power secondary reduction coefficient corresponding to the interval is the required secondary reduction coefficient; the pump power secondary reduction coefficient obtained is multiplied by the original pump power, and the result is the pump power that needs to be adjusted to; the pump power secondary reduction coefficient is less than 1, indicating the proportion of the pump power that needs to be reduced again.

[0071] If the fault early warning index of the laser optical resonant cavity in the third period is greater than the second early warning index, the out-of-control early warning information is pushed to the operation and maintenance platform, and a second early warning deviation value of the laser optical resonant cavity in the third period is obtained based on the fault early warning index of the laser optical resonant cavity in the third period and the second early warning index. A laser operating power secondary reduction coefficient is matched from the control database based on the second early warning deviation value of the laser optical resonant cavity in the third period, the laser operating power is further reduced, a cooling system circulation rate improvement coefficient is matched from the control database based on the second early warning deviation value of the laser optical resonant cavity in the third period, and the circulation rate of the cooling system is improved.

[0072] Need to be explained, the above out-of-control early warning information includes the specific time of triggering the out-of-control early warning information, the second early warning deviation value, etc.; the above obtaining the second early warning deviation value of the laser optical resonant cavity in the third period refers to the difference processing of the fault early warning index of the laser optical resonant cavity in the third period and the second early warning index; the processing result is further processed by ratio, and the final result is the second early warning deviation value of the laser optical resonant cavity in the third period; the above matching the laser operating power secondary reduction coefficient from the control database based on the second early warning deviation value of the laser optical resonant cavity in the third period, the specific matching process is: the control database stores the laser operating power secondary reduction coefficient corresponding to each second early warning deviation value interval, the obtained second early warning deviation value is input into the control database, the control database can match the corresponding second early warning deviation value interval, and the laser operating power secondary reduction coefficient corresponding to the interval is the required laser operating power secondary reduction coefficient. The obtained laser operating power secondary reduction coefficient is multiplied by the original laser operating power, and the result obtained is the laser operating power that needs to be adjusted; the above laser operating power secondary reduction coefficient is less than 1, indicating that the laser operating power needs to be reduced twice.

[0073] The above matching the cooling system circulation rate improvement coefficient from the control database based on the second early warning deviation value of the laser optical resonant cavity in the third period, the specific matching process is: the control database stores the cooling system circulation rate improvement coefficient corresponding to each second early warning deviation value interval, the obtained second early warning deviation value is input into the control database, the control database can match the corresponding second early warning deviation value interval, and the cooling system circulation rate improvement coefficient corresponding to the interval is the required cooling system circulation rate improvement coefficient. The obtained cooling system circulation rate improvement coefficient is multiplied by the original cooling system circulation rate, and the result obtained is the cooling system circulation rate that needs to be adjusted; the above cooling system circulation rate improvement coefficient is greater than 1, indicating the number of times the cooling system circulation rate needs to be improved.

[0074] Reference Figure 2As shown, the second aspect of the present application provides a remote fault monitoring system for automatic control of a laser, comprising: a running monitoring and regulation decision module, a regulation effect evaluation and fault preliminary judgment module, a fault feature analysis and hierarchical early warning module, and a control database.

[0075] The running monitoring and regulation decision module is connected to the regulation effect evaluation and fault preliminary judgment module, the regulation effect evaluation and fault preliminary judgment module is connected to the fault feature analysis and hierarchical early warning module, the running monitoring and regulation decision module is connected to the fault feature analysis and hierarchical early warning module, and the three are collectively connected to the control database; the control database is used to store various parameters involved in the remote fault monitoring system for automatic control of a laser.

[0076] Referring to Figure 3 As shown in the step flowchart of the running monitoring and regulation decision method of the optical resonant cavity of the laser of the present application, the flow starts with obtaining an optical resonant cavity running stability coefficient, and comparing it with an optical resonant cavity running stability threshold value; if the optical resonant cavity running stability coefficient is greater than or equal to the optical resonant cavity running stability threshold value, it indicates that the resonant cavity is in good working condition and does not need to be adjusted; if the optical resonant cavity running stability coefficient is less than the threshold value, the optical resonant cavity running stability deviation value is further obtained and compared with the running stability deviation threshold value; when the optical resonant cavity running stability deviation value is less than the optical resonant cavity running stability deviation threshold value, the system reduces the pump power based on the deviation value, thereby reducing heat accumulation and energy loss; if the optical resonant cavity running stability deviation value is greater than or equal to the optical resonant cavity running stability deviation threshold value, the system will reduce the laser running power based on the deviation value, thereby relieving the thermal effect and reducing the system pressure, and at the same time pushing an emergency early warning information to the operation and maintenance platform to prompt the staff to pay attention to the abnormal situation in time.

[0077] Referring to Figure 4 As shown in the step flowchart of the remote regulation method of the optical resonant cavity of the laser of the present application, after the running stability coefficient processing is completed, the system obtains a remote regulation effective index and compares it with a remote regulation effective threshold value; if the remote regulation effective index is greater than or equal to the remote regulation effective threshold value, it indicates that the remote regulation effect meets the standard and does not need to be adjusted; if the remote regulation effective index is less than the remote regulation effective threshold value, the fundamental mode proportion needs to be improved to optimize the performance; the specific way is to obtain a high-order mode proportion, if the high-order mode proportion is greater than a high-order mode proportion threshold value, the system reduces the light transmission aperture based on the high-order mode proportion deviation value; if the high-order mode proportion is less than or equal to the high-order mode proportion threshold value, the gain medium length is shortened based on the high-order mode proportion deviation value.

[0078] Referring to Figure 5As shown in the flowchart of the steps for determining whether to issue a fault warning for the remote control result of the present invention, after the adjustment is completed, the system obtains the improvement rate of the operating stability coefficient of the optical resonant cavity in the second cycle and compares it with the improvement rate threshold. If the improvement rate of the operating stability coefficient of the optical resonant cavity in the second cycle is greater than or equal to the improvement rate threshold, it is determined that no fault warning is required; if it is less than the improvement rate threshold, the fault warning process is entered.

[0079] Reference Figure 6 As shown in the step flow diagram of the fault warning of the laser optical resonator of the present invention, after entering the fault warning process, the system obtains the optical resonator fault warning index and compares it with the first warning index and the second warning index; if the fault warning index is less than the first warning index, it indicates that the system status is normal and no adjustment is required; if the first warning index is greater than or equal to the fault warning index and less than or equal to the second warning index, the system will push critical fault warning information to the operation and maintenance platform, and at the same time reduce the pump power based on the first warning deviation value, and generate instructions to fine-tune the cavity mirror angle, intervening in advance to avoid the deterioration of the fault; if the fault warning index is greater than the second warning index, the system will push out-of-control warning information to the operation and maintenance platform, further reduce the laser operating power based on the second deviation value, and at the same time improve the circulation efficiency of the cooling system to fully ensure the stable operation of the system.

[0080] The operation monitoring and control decision module is used to monitor the operating status of the laser, and at the same time obtain and analyze the operating stability parameters of the laser optical resonator to determine whether the laser operation process should be remotely controlled; the control effect evaluation and fault initial judgment module is used to continuously monitor the laser optical resonator after the remote control is completed, collect and analyze the effective indicators of the remote control of the laser optical resonator, determine whether the remote control of the laser optical resonator is effective, and obtain the improvement rate of the operating stability coefficient of the laser optical resonator after control, so as to determine whether to issue a fault warning for the laser optical resonator; the fault feature analysis and graded warning module is used to obtain and analyze the fault feature parameters of the laser optical resonator, so as to realize graded warning for the laser optical resonator.

[0081] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the present invention, they should all fall within the scope of protection of the present invention.

Claims

1. A remote fault monitoring method for automatic laser control, characterized in that: include: Step 1: Monitor the operating status of the laser, obtain and analyze the operating stability parameters of the laser optical resonator, and determine whether to remotely control the operation of the laser; Step 2: After the remote control is completed, continuously monitor the laser optical resonator, collect and analyze the effective indicators of the remote control of the laser optical resonator, determine whether the remote control of the laser optical resonator is effective, and obtain the improvement rate of the operation stability coefficient of the laser optical resonator after the control, so as to determine whether to issue a fault warning for the laser optical resonator; Step 3: Obtain and analyze the fault characteristic parameters of the laser optical resonator, thereby achieving graded early warning of the laser optical resonator.

2. The remote fault monitoring method for automatic laser control according to claim 1, characterized in that: The specific analysis process of obtaining and analyzing the operating stability parameters of the laser optical resonator is as follows: The operational stability parameters of the laser optical resonant cavity include a mode volume factor of the optical resonant cavity, a cavity temperature gradient factor of the optical resonant cavity, and a vibration spectrum energy factor of the optical resonant cavity; The influence coefficients are introduced from the control database to quantify the influence of the mode volume factor, cavity temperature gradient factor, and vibration spectrum energy factor on the operation stability coefficient of the optical resonator. The various degrees are coupled to obtain the operation stability coefficient of the laser optical resonator in the first cycle. The operation stability coefficient of the laser optical resonant cavity in the first cycle represents the stability of the optical resonant cavity when it operates in the first cycle.

3. The remote fault monitoring method for automatic laser control according to claim 2, characterized in that: The specific process of determining whether to remotely control the operation of the laser is as follows: comparing the operation stability coefficient of the laser optical resonant cavity in the first cycle with the operation stability threshold of the laser optical resonant cavity; If the operation stability coefficient of the laser optical resonant cavity in the first cycle is greater than or equal to the operation stability threshold of the laser optical resonant cavity, it is determined that there is no need to remotely control the operation process of the laser; If the operation stability coefficient of the laser optical resonant cavity in the first cycle is less than the operation stability threshold of the laser optical resonant cavity, it is determined that the operation process of the laser is remotely controlled.

4. The remote fault monitoring method for automatic laser control according to claim 3, characterized in that: The operation process of the laser is remotely controlled, and the specific control process is as follows: obtaining an operation stability deviation value of the laser optical resonator in the first cycle based on an operation stability coefficient of the laser optical resonator in the first cycle and an operation stability threshold value of the laser optical resonator, and comparing the operation stability deviation value of the laser optical resonator in the first cycle with the operation stability deviation threshold value of the laser optical resonator; If the operation stability deviation value of the laser optical resonator in the first cycle is less than the operation stability deviation threshold of the laser optical resonator, matching a pump power reduction coefficient from a control database based on the operation stability deviation value of the laser optical resonator in the first cycle, thereby reducing the pump power; If the operation stability deviation value of the laser optical resonator in the first cycle is greater than or equal to the operation stability deviation threshold of the laser optical resonator, the laser operation power reduction coefficient is matched from the control database based on the operation stability deviation value of the laser optical resonator in the first cycle, thereby reducing the laser operation power, and at the same time pushing emergency warning information to the operation and maintenance platform.

5. The remote fault monitoring method for automatic laser control according to claim 1, characterized in that: The effective indicators of remote control of the laser optical resonator are collected and analyzed, and the specific analysis process is as follows: The effective indicators for remote control of the laser optical resonant cavity include the intracavity loss difference factor of the optical resonant cavity, the cavity vibration amplitude factor of the optical resonant cavity, and the beam quality factor of the optical resonant cavity; Obtaining the operational stability coefficient of the laser optical resonator in the second cycle; The influence coefficients are introduced from the control database to quantify the influence of the intracavity loss difference factor, cavity vibration amplitude factor, and beam quality factor on the remote control effective index. At the same time, the influence coefficients are used to quantify the influence of the operation stability coefficient of the laser optical resonator in the second cycle on the remote control effective index. The various degrees are coupled to obtain the remote control effective index of the laser optical resonator in the second cycle. The remote control effectiveness index of the laser optical resonant cavity in the second cycle indicates the extent to which the preset target in the control database can be achieved in the second cycle after the laser optical resonant cavity is remotely controlled.

6. The remote fault monitoring method for automatic laser control according to claim 1, characterized in that: The specific analysis process for determining whether the remote control of the laser optical resonant cavity is effective is as follows: Comparing the remote control effective index of the laser optical resonator in the second cycle with the remote control effective threshold; If the remote control effectiveness index of the laser optical resonator in the second cycle is greater than or equal to the remote control effectiveness threshold, then it is determined that the remote control of the laser optical resonator is effective; If the remote control effectiveness index of the laser optical resonator in the second period is less than the remote control effectiveness threshold, it is determined that the remote control of the laser optical resonator is invalid, and the remote control process of the laser optical resonator is adjusted. The specific adjustment process is: obtaining the high-order mode ratio of the laser optical resonator in the second period, and comparing the high-order mode ratio of the laser optical resonator in the second period with the high-order mode ratio threshold; If the high-order mode ratio of the laser optical resonator in the second period is greater than a high-order mode ratio threshold, obtaining a high-order mode ratio deviation value of the laser optical resonator in the second period based on the high-order mode ratio of the laser optical resonator in the second period and the high-order mode ratio threshold, and matching a light transmission aperture reduction coefficient from a control database based on the high-order mode ratio deviation value of the laser optical resonator in the second period, thereby reducing the light transmission aperture of the mode selection aperture in the optical resonator; If the high-order mode ratio of the laser optical resonator in the second period is less than or equal to the high-order mode ratio threshold, a gain medium shortening coefficient is matched from a control database based on a deviation value of the high-order mode ratio of the laser optical resonator in the second period, thereby reducing the gain medium length.

7. The remote fault monitoring method for automatic laser control according to claim 1, characterized in that: The specific analysis process of determining whether to issue a fault warning for the laser optical resonator is as follows: obtaining an improvement rate of the operation stability coefficient of the laser optical resonator in the second period based on an operation stability coefficient of the laser optical resonator in the first period and an operation stability coefficient of the laser optical resonator in the second period, and comparing the improvement rate of the operation stability coefficient of the laser optical resonator in the second period with a threshold value of the improvement rate of the operation stability coefficient of the laser optical resonator; If the operation stability coefficient improvement rate of the laser optical resonator in the second cycle is greater than or equal to the operation stability coefficient improvement rate threshold of the laser optical resonator, it is determined that no fault warning is issued for the laser optical resonator; If the operation stability coefficient improvement rate of the laser optical resonator in the second period is less than the operation stability coefficient improvement rate threshold of the laser optical resonator, it is determined that a fault warning is issued for the laser optical resonator.

8. The remote fault monitoring method for automatic laser control according to claim 1, characterized in that: The specific analysis process of obtaining and analyzing the fault characteristic parameters of the laser optical resonator is as follows: The fault characteristic parameters of the laser optical resonant cavity include a cavity mirror reflectivity drop factor of the optical resonant cavity and a wavelength drift factor of the optical resonant cavity; Obtaining an operational stability coefficient of the laser optical resonant cavity in the third period and a remote control effective index of the laser optical resonant cavity in the third period; The influence coefficients are introduced from the control database to quantify the influence of the cavity mirror reflectivity drop rate factor and the wavelength drift factor on the optical resonator fault warning index. At the same time, the influence coefficients are used to quantify the influence of the operation stability coefficient of the laser optical resonator in the third cycle and the remote control effectiveness index of the laser optical resonator in the third cycle on the optical resonator fault warning index. These various degrees are coupled to obtain the fault warning index of the laser optical resonator in the third cycle. The fault warning index of the laser optical resonant cavity in the third cycle indicates the urgency of the failure of the optical resonant cavity in the third cycle.

9. The remote fault monitoring method for automatic laser control according to claim 8, characterized in that: The specific analysis process of the graded warning for the laser optical resonator is as follows: comparing a fault warning index of the laser optical resonator in the third cycle with the first warning index and the second warning index; If the fault warning index of the laser optical resonator in the third cycle is less than the first warning index, no warning is required; If the fault warning index of the laser optical resonator in the third cycle is greater than or equal to the first warning index and less than or equal to the second warning index, the critical fault warning information is pushed to the operation and maintenance platform. At the same time, based on the fault warning index of the laser optical resonator in the third cycle and the first warning index, the first warning deviation value of the laser optical resonator in the third cycle is obtained. Based on the first warning deviation value of the laser optical resonator in the third cycle, the pump power quadratic reduction coefficient is matched from the control database to further reduce the pump power, and a cavity mirror angle fine-tuning instruction is generated at the same time. If the fault warning index of the laser optical resonator in the third cycle is greater than the second warning index, the out-of-control warning information is pushed to the operation and maintenance platform. At the same time, based on the fault warning index and the second warning index of the laser optical resonator in the third cycle, the second warning deviation value of the laser optical resonator in the third cycle is obtained. Based on the second warning deviation value of the laser optical resonator in the third cycle, the laser operating power secondary reduction coefficient is matched from the control database to further reduce the laser operating power. Based on the second warning deviation value of the laser optical resonator in the third cycle, the cooling system circulation rate increase coefficient is matched from the control database to increase the circulation rate of the cooling system.

10. A system using the remote fault monitoring method for automatic laser control according to any one of claims 1 to 9, characterized in that: include: The operation monitoring and control decision module is used to monitor the operating status of the laser, obtain and analyze the operating stability parameters of the laser optical resonator, and determine whether to remotely control the operation process of the laser; The control effect evaluation and fault initial diagnosis module is used to continuously monitor the laser optical resonator after remote control is completed, collect and analyze the effective indicators of the remote control of the laser optical resonator, determine whether the remote control of the laser optical resonator is effective, and obtain the improvement rate of the operating stability coefficient of the laser optical resonator after control, so as to determine whether to issue a fault warning for the laser optical resonator; The fault feature analysis and graded warning module is used to obtain and analyze the fault feature parameters of the laser optical resonator, thereby achieving graded warning for the laser optical resonator.

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