143 results about "Arc voltage" patented technology

The invention relates to the technical field of welding automation, and discloses an intelligent welding system for an electric pole steel reinforcement framework. The system comprises a welding execution module, a multi-mode sensing module, an edge calculation module, a real-time regulation and control module and a system control center. Synchronous collection and real-time analysis of images, temperature and sound signals of a welding pool area are achieved, so that defects such as air holes, slag inclusion and incomplete fusion can be recognized online in a key time window when the welding pool is not solidified, and time delay caused by a traditional off-line detection mode is thoroughly eliminated. Through a real-time regulation and control module, on the basis of a multi-target optimization decision and parameter self-adaptive adjustment mechanism, the system can dynamically adjust key process parameters such as welding current, arc voltage and welding speed at the moment of identifying defect germination or process deviation, and real-time intervention and closed-loop control on welding quality are achieved; therefore, the final formation of defect welding seams is avoided fundamentally, and the rework rate and the material waste are remarkably reduced.

The invention relates to the technical field of ammeter fault detection, and provides an intelligent ammeter series arc fault detection method, system and device, a medium and equipment, and the method comprises the steps: firstly obtaining an ammeter data set of an intelligent ammeter, which comprises a pre-ammeter voltage, a post-ammeter voltage and a total loop current in a continuous power frequency period, and then carrying out the division through a sliding time window, obtaining a plurality of ammeter data windows; for each window, calculating a voltage difference sequence and a dynamic loss impedance sequence; when the absolute value of the total loop current is smaller than a preset threshold value, determining the current zero-break interval of each power frequency period and the current zero-break time corresponding to the window; determining an arc voltage estimation value according to a voltage difference between non-zero-break intervals in the zero-break interval; and finally, integrating the current zero break time, the arc voltage estimated value and the dynamic loss impedance of each window to judge whether a series arc fault exists, and if so, triggering a protection action. According to the embodiment of the invention, high-reliability identification of the series arc fault is realized.

A converter station AC filter group circuit breaker abnormal arcing modeling analysis method comprises the following steps: firstly, carrying out time mark alignment, amplitude calibration and filtering de-noising on wave recording signals such as AC bus voltage and filter branch current to obtain high-quality input data; then, combining a primary wiring diagram, enabling an alternating current system to be equivalent to an ideal power supply and series impedance, enabling circuit breaker arcing to be equivalent to arc resistance changing along with time, and constructing an equivalent circuit model comprising the power supply, the impedance, a capacitor, an electric reactor and dynamic arc resistance; establishing a state space equation according to a voltage and current constraint relation, and performing time domain solution by adopting a two-step two-order or three-order diagonal implicit Runge-Kutta method to obtain voltage and current responses of the whole process of the fault; on this basis, the arc resistance change is inversed according to the ratio of arc voltage to current, the current zero passage is identified through the resistance symbol change at adjacent moments, and the zero passage section is smoothed; and finally, the inversion result is verified again by means of the simplified equivalent model.

The invention provides a circuit breaker contact ablation evaluation method and device, electronic equipment and a storage medium, and the method comprises the steps: collecting a test current and a mechanical stroke curve of a pull rod of a hydraulic mechanism of a to-be-tested circuit breaker in a breaking test process of the to-be-tested circuit breaker; collecting a first arc voltage waveform of a main contact and a second arc voltage waveform of an arc contact of the circuit breaker to be tested; evaluating the ablation state of the main contact by using the test current and the first arc voltage waveform; and evaluating the ablation state of the arc contact by using the first arc voltage waveform, the mechanical stroke curve and the second arc voltage waveform. According to the scheme, the ablation states of the main contact and the arc contact are evaluated through the test current, the mechanical stroke curve and the arc voltage waveform, the ablation states can be evaluated without enabling the circuit breaker to be separated from a normal working state or a test state, and the evaluation efficiency is improved.

The invention discloses a surface arcing voltage prediction method based on an electric field feature set and a terminal. The method comprises the following steps: measuring a voltage data set of surface arcing voltage of an insulating material under different environmental factors through tests; constructing an electric field distribution simulation model of surface arcing based on the test parameters, outputting an electric field distribution original data set by the electric field distribution simulation model, and extracting a corresponding electric field feature set from each electric field distribution original data; and carrying out model training based on the voltage data set and the corresponding electric field feature set, and carrying out surface arcing voltage prediction by using a surface arcing voltage prediction model obtained by training, so that accurate and rapid prediction of the surface arcing voltage of the insulating material in the wet and dirty environment can be realized. And an effective technical support is provided for external insulation design and state evaluation of the electrical equipment.

The invention discloses a pulse welding droplet transition control method, system and device and a storage medium, and the method comprises the steps that a first pulse parameter of a main pulse and a second pulse parameter of a micro pulse for welding are initialized, and the micro pulse is used for being superposed on a peak stage of the main pulse to form a target pulse sequence; a pulse current waveform of the target pulse sequence is determined according to the first pulse parameter and the second pulse parameter, and target welding current is generated according to the pulse current waveform; the target metal material is welded according to the target welding current, and a real-time molten drop image and a real-time arc voltage are collected; determining the diameter deviation of the molten drop according to the real-time molten drop image, determining the arc voltage deviation according to the real-time arc voltage, and optimizing the first pulse parameter and the second pulse parameter according to the diameter deviation of the molten drop and the arc voltage deviation. The method improves the welding seam forming quality and the metal welding quality, and can be widely applied to the technical field of metal welding.

The invention discloses a welding power supply extension module integrating arc voltage tracking and welding machine control functions and a welding control method, and belongs to the technical field of electric arc welding. In order to solve the problems that arc voltage tracking and welding machine control are mutually independent and cannot cooperate in real time in the existing TIG welding process, so that the welding process is tedious in operation and unstable in quality, the system comprises a core processor for executing an arc voltage tracking control algorithm and a welding parameter adjusting algorithm; the signal conditioning circuit is used for collecting and conditioning a current signal and a voltage signal output by the welding power supply; the welding power supply control module is provided with a plurality of interface circuits used for being connected with welding power supplies of different interface types; the core processor receives state information of the welding process through the high-speed communication module and generates a first control instruction used for adjusting output parameters of a welding power source and a second control instruction used for adjusting the height of a welding gun according to the state information and current signals and voltage signals collected by the signal conditioning circuit. The method is used for electric arc welding.

A unit pole of a double-breakpoint switch belongs to the technical field of low-voltage electric appliances. Comprising a shell, static contacts, a bridge-type moving contact, an arc extinguish chamber and a rotating shaft, the static contacts, the bridge-type moving contact, the arc extinguish chamber and the rotating shaft are located in the shell, the bridge-type moving contact is installed in the rotating shaft and comprises a pair of moving contact arms which extend out of the rotating shaft in a back-to-back mode, the static contacts are in a flat plate shape and are arranged on the top wall and the bottom wall in the shell respectively, and the arc extinguish chamber is arranged in the shell. The arc extinguish chambers are arranged in the shell and are in contact fit with the movable contact arms respectively, the movable contact arms form a < shape when making contact with the static contact, and the arc extinguish chambers are located on the left side and the right side in the shell respectively. The arc extinguish chamber has the advantages that the space occupied by the static contact in the shell is reduced, so that the space for placing the arc extinguish chamber can be increased, the arc extinguish chamber can obtain a larger space in the array direction of the grid sheets, more grid sheets can be stacked, the arc voltage can be improved, and the arc can be extinguished quickly; and meanwhile, the requirement of high-voltage breaking is met.

The invention discloses a contact ablation assessment method and system in an SF6 circuit breaker breaking test, and relates to the field of contact ablation assessment, and the method comprises the steps: connecting an arc voltage divider in parallel at two ends of an SF6 circuit breaker, deploying a displacement sensor, and starting a main contact and arc contact breaking test; in the test process, arc voltage, current magnitude, contact displacement and voltage waveform data are acquired in real time through a high-frequency data acquisition system, denoising processing is performed on the voltage waveform data, and starting time, duration time and peak voltage of the arc are extracted; establishing a regression relation model between the arc duration time and the current magnitude according to the arc duration time and the current magnitude; and evaluating the ablation degree of the main contact through the regression relation model between the arc duration and the current magnitude, evaluating the ablation degree of the arc contact through the contact displacement, and generating a real-time contact health evaluation report according to the ablation evaluation result. And the evaluation efficiency is effectively improved.

The invention relates to the technical field of welding control, in particular to a welding control method and system for a tank body welding machine. The method comprises the steps that in the arc starting stage, the change rate of contact resistance is calculated in real time, when the change rate is larger than a preset change rate threshold value, main welding current is switched, a welding wire is drawn back to complete arc starting, and in the steady-state welding stage, the reference height of a welding gun is calculated based on the rotation angle of a tank body and pre-stored weld joint contour data; performing fast Fourier transform on the arc voltage, calculating an arc form factor, weighting deviation between the target arc voltage and the arc voltage by using the arc form factor to obtain a welding gun height compensation amount, generating a wire feeding speed regulation factor based on the arc form factor, and regulating a reference wire feeding speed to obtain a welding gun height compensation value; and the welding gun reference height and the welding gun height compensation amount are superposed to generate a welding gun height instruction. According to the scheme, arcing can be accurately controlled, the reliability of height tracking of the welding gun and the self-adaptive wire feeding speed are improved, and the welding seam quality is improved.

This invention discloses a plasma generator, including a rear electrode assembly and an output electrode assembly. The output electrode assembly includes an output electrode connected to the rear electrode assembly. The inner cavity of the output electrode includes a first compression section, a throat straight section, and a first expansion section connected sequentially at their ends along the medium flow direction. Along the medium flow direction: the cross-sectional area of ​​the first compression section gradually decreases, the cross-sectional area of ​​the throat straight section remains constant, and the cross-sectional area of ​​the first expansion section gradually increases. In the plasma generator provided in this application, by first compressing and then expanding the medium within the inner cavity of the output electrode, under the same power conditions, the electrode ablation rate is reduced by increasing the arc voltage and decreasing the operating current. Therefore, the service life of the plasma generator provided in this application is extended.

The invention relates to an SF6 circuit breaker breaking capacity evaluation method and device based on an arc black box model and a medium. The method comprises the steps that a voltage value and a current value in the breaking process of an SF6 circuit breaker are collected; collecting an arcing interval input charge quantity and gas pressure in an arc extinguish chamber under the current on-off working condition; a fitting arc voltage curve is calculated through the voltage value and the current value in the breaking process, and a set of Mayr model parameters are selected according to the difference value between the fitting arc quenching peak and the actual arc quenching peak of the fitting arc voltage curve; substituting the Mayr model parameters, the input charge quantity and the gas pressure in the arc extinguish chamber into a dimensionless relational expression constructed based on dimensional analysis for solving to obtain an on-off constant, determined by historical on-off test data, of the SF6 circuit breaker; and calculating the predicted arc extinguishing peak voltage of the to-be-evaluated SF6 circuit breaker under each on-off working condition so as to evaluate the on-off capability of the to-be-evaluated SF6 circuit breaker. Compared with the prior art, the method has the advantages of low cost, high efficiency, high universality and the like.

The invention relates to the technical field of disconnecting switches, in particular to a switching device with an arc extinguishing system, which comprises a base, a cover body matched with the base and an enclosed cavity arranged between the base and the cover body, the enclosed cavity comprises shells stacked from top to bottom, and a rotary contact mechanism, a static contact, a medium cover and a transmission mechanism are arranged in the shells; the rotary contact mechanism can rotate around the central axis and is used for being connected with the static contact to achieve closing or being disconnected to achieve opening. According to the switching device with the arc extinguishing system, the core problems that the voltage boosting of a small-size single-pole switch is limited, the arc extinguishing is difficult and the like are effectively solved. Through the synchronous action of the sickle-shaped dielectric cover and the rotary contact mechanism, the static contact is coated and the arc path is cut off during opening, and an arc-resistant gas-generating insulating material is matched, so that the arc voltage can be quickly increased, the disconnection voltage of products with the same volume is increased to more than DC800V from DC400V, and the industrial voltage specification requirements of 400V and more are met.

The application provides a circuit breaker contact ablation evaluation method and device, electronic equipment and a storage medium. The method comprises the following steps: collecting a test current and a mechanical stroke curve of a hydraulic mechanism pull rod of a to-be-tested circuit breaker during a breaking test of the to-be-tested circuit breaker, and collecting a first arc voltage waveform of a main contact of the to-be-tested circuit breaker and a second arc voltage waveform of an arc contact; evaluating an ablation state of the main contact by using the test current and the first arc voltage waveform; and evaluating an ablation state of the arc contact by using the first arc voltage waveform, the mechanical stroke curve and the second arc voltage waveform. The ablation states of the main contact and the arc contact are evaluated by using the test current, the mechanical stroke curve and the arc voltage waveform, so that the ablation state can be evaluated without causing the circuit breaker to be separated from a normal working state or a test state, and the evaluation efficiency is improved.

The invention relates to the technical field of low-voltage switching devices, in particular to an arc extinguishing device and a circuit breaker. The arc extinguishing device provided by the invention comprises a contact system, an arc extinguishing chamber and an arc running piece, the arc extinguish chamber comprises a plurality of grid sheets, and all the grid sheets are sequentially arranged at intervals to form a grid sheet group; the arc running piece is arranged on one side of the notch of the grid piece group along the arrangement direction of the grid pieces, and the arc running piece is electrically connected with the contact system; at least one bending part is arranged on the arc running piece in the arc running direction of the arc running piece, the bending part protrudes towards the notch side of the grid piece set, and the bending part and the grid pieces form breakdown points. The arc running piece is provided with at least one bending part along the arc running direction, the bending part protrudes towards one side of the notch of the grid piece group and is matched with the grid piece in the arc extinguish chamber to form a breakdown point, an electric arc is guided to be broken down and transferred towards the end part on the arc running piece through the breakdown point, and repeated advance and retreat are avoided, so that the arc voltage can be pulled up more quickly, and the product performance is improved.

The present application relates to a kind of medium voltage DC hybrid circuit breaker in vacuum mechanical switch high arc voltage implementation method, based on the basic principle of natural commutation of DC breaking, form arc voltage promotion method, propose the overall technical scheme based on high arc voltage vacuum fast mechanical switch, provide theory and technical basis for the research and development of natural commutation type medium voltage DC circuit breaker, engineering application.Through external transverse magnetic field (external transverse magnetic field, ETMF) to make up for the shortage of its own magnetic field.When vacuum switch is directly used for low voltage DC breaking, external transverse magnetic field control plays a crucial role.The effect of transverse magnetic field on vacuum arc is to improve the voltage of vacuum arc, force the current of DC loop to zero, thereby realizing the DC breaking of vacuum switch.Improve the rapidity and reliability of current transfer, expand the application scenario of natural commutation mode, improve the arc voltage of fast mechanical switch, improve commutation and breaking performance.

The application discloses a kind of switch arc voltage measuring device and measuring method, measuring device includes measurement capacitor unit, signal acquisition unit and data processing unit;Measurement capacitor unit includes high-voltage arm measurement capacitor and low-voltage arm measurement capacitor;Signal acquisition unit is connected with low-voltage arm measurement capacitor, and it is configured to corresponding acquisition and pre-processing of the voltage signal input to low-voltage arm measurement capacitor;Data processing unit and signal acquisition unit are connected, and it is configured to determine the arc voltage of the break of the switch contact end to be measured according to the voltage signal data after pre-processing, and in combination with the voltage division ratio relationship of high-voltage arm measurement capacitor and low-voltage arm measurement capacitor.The switch arc voltage measuring device and measuring method provided by the application can realize real-time measurement of switch arc voltage by using capacitor voltage division principle, and will not affect the normal work and insulation performance of switch device.

The invention discloses a long pulse debugging method for a large-area thermionic cathode ion source, and belongs to the technical field of thermionic cathode ion sources, and the method comprises the steps: carrying out the air inlet vacuum debugging after the ion source is assembled; the insulation and voltage endurance capability is improved through cold high-voltage exercise; turning off high voltage, lighting a lamp filament, applying arc voltage, and cleaning the cavity through arc chamber plasma discharge; the extraction voltage is gradually applied to perform beam extraction exercise, and beam transmission is optimized through diversion coefficient scanning; and finally, the diversion coefficient is reduced, the pulse width is prolonged, and long-pulse discharge debugging is realized. According to the method, a systematic debugging process from vacuum verification, insulation and voltage resistance, cavity cleaning to beam extraction and long pulse discharge is established, the stability and reliability of the ion source can be effectively improved, the breakdown risk is reduced, and a technical basis is provided for long-term stable operation of a large-area hot cathode ion source in the future.

The invention discloses a road bridge expansion joint welding device, which belongs to the technical field of road bridge expansion joint welding and comprises a welding system body and a real-time control system arranged in the welding system body. The real-time control system comprises an arc voltage / current sensor module, a signal conditioning and collecting module, a main controller module, a welding power source interface module, a degaussing coil driving module, a robot servo driving module, a man-machine interaction and monitoring module and an offline calibration data storage module. The output end of the arc voltage / current sensor module is connected to the input end of the signal conditioning and collecting module. According to the method, welding arc signals are collected to recognize magnetic deflection blow, the deflection angle and magnetic field distribution are dynamically calculated, measures such as pulse modulation, active demagnetization or track compensation are adopted for autonomous decision, the incomplete fusion defect caused by residual magnetism is eliminated, the anchoring welding quality is ensured, and early brittle failure and failure caused by hidden danger welding spots are avoided.

The utility model relates to the technical field of surfacing equipment, and discloses plasma powder centrifugal machine blade surfacing equipment which comprises a base, a floor positioner, a running mechanism, an oscillator mechanism, a powder feeder, a plasma welding gun, a power supply control integrated cabinet, a cooling water tank and an upper computer system. The oscillator mechanism is mounted on a moving part of the running mechanism; all core units such as the landing positioner, the electric lead screw operating mechanism, the oscillator, the arc voltage heightening device, the powder feeder and the plasma power supply are integrally controlled through the upper computer system, full-automatic accurate control over the whole surfacing process is achieved, and dependence on skills of operators is greatly reduced; accurate execution and repeatability of process parameters are guaranteed, and stability and consistency of surfacing quality are improved fundamentally.

The application discloses a kind of arc extinguishing assembly and direct current arc extinguishing chamber, belong to low-voltage electrical apparatus field, a kind of arc extinguishing assembly, including integral arc runner, the rear side of integral arc runner is provided with two groups of split arc runner group, the rear side of split arc runner group is provided with arc guide piece;A kind of direct current arc extinguishing chamber, including arc extinguishing chamber base, the inside of arc extinguishing chamber base is provided with protection assembly, the lower of arc extinguishing chamber base is provided with left side plate and right side plate, left side plate and right side plate are provided with above-mentioned arc extinguishing assembly between, the lower of arc extinguishing assembly is provided with left gas blowing piece and right gas blowing piece.The application is on the basis of existing appearance size, by changing the layout of arc runner to increase the number of arc runner, to realize DC2000V and DC2500V operating voltage requirement;The application is to increase the number of grid piece, increase left and right arrangement scheme design, this arrangement can make the number of arc runner increase 1.5-2 times, greatly improve arc voltage.

The invention discloses an arc suppression coil power distribution network arc grounding fault distance measurement method based on line double-end data analysis. The method comprises the steps that 1, phase sequence currents and phase sequence voltages of the two sides of a fault section are acquired; step 2, calculating fault point equivalent arc current and fault point equivalent arc voltage, constructing a fault point arc volt-ampere characteristic curve, and solving an arc grounding fault transition resistance curve; step 3, intercepting a resistance curve, extracting a steady-state arcing time period and calculating the resistance of the steady-state arcing time period; step 4, solving the accurate fault distance measurement function by using the accurate fault distance measurement function to obtain suspected fault points, and constructing a suspected fault point array; step 5, based on the suspected fault point array, setting suspected fault intervals with different lengths, solving positions and center points; step 6, setting a suspected fault interval length, and repeating the step 5 to obtain a position and a suspected fault distance array x; and step 7, eliminating abnormal values by using a quartile method, and determining a fault distance of final positioning.

The present invention provides a pulsed arc welding tracing control method, control device, welding system, welding program, and welding power supply that, even when using the pulsed arc welding method, are not affected by the pulse shape of the welding current and arc voltage, and furthermore, enable the extraction of highly accurate information on the change in protrusion length, even for portions that do not actually appear as changes in current. [Solution] A pulsed arc welding tracking control method in which the amount of electrical change X detected during weaving includes at least a welding current detection signal Io, an arc voltage detection signal Vo, a predetermined set voltage Vset, and a predetermined current conversion characteristic value Char as parameters, a predetermined period Tf is defined as one interval, the average value Yn of the amount of electrical change X in each interval is calculated, and based on the average value Yn, information on the protrusion change in the groove is extracted to track the weld line.

The invention discloses an intelligent welding system and method based on multi-information fusion and self-adaptive control, and relates to the field of automatic welding, and the method comprises the following steps: collecting a molten pool area image, welding current and arc voltage signals in a welding process through a visual sensing module and an arc sensing module to obtain a synchronous sensing data set; a molten pool area image in the synchronous sensing data set is preprocessed, geometrical characteristic parameters of a molten pool are extracted, welding current and arc voltage signals in the synchronous sensing data set are analyzed, arc electric signal characteristics are extracted, and a multi-dimensional characteristic parameter set is obtained; and inputting the multi-dimensional characteristic parameter set into a pre-generated welding process cause and effect graph model for reasoning calculation, and outputting a welding seam tracking deviation and a penetration state index. Feedforward-feedback composite control over the welding process is achieved, and the welding quality, stability and consistency under the complex working condition are improved.

This utility model relates to the technical field of arc voltage hybrid circuit breakers, and more particularly to a hybrid molded case circuit breaker based on arc voltage. It includes a circuit breaker body, a front panel for wiring ports, wiring ports, and screw-type terminals. A connecting wire guide mechanism is provided on the front panel for the wiring ports, and the connecting wire guide mechanism includes a concave clamp plate. A locking screw is connected to the front of the concave clamp plate, and a limiting protrusion is connected to the center of the top of the concave clamp plate. In this utility model, after the circuit breaker connecting wire is fixed by the screw-type terminals, the front end of the connecting wire can be placed in an anti-bending tube. This not only ensures that the front end of the connecting wire will not be dented, but also protects the front end of the wire, preventing increased friction between the wire and the wall panel at the bend, which could lead to short circuits and increased electrical safety risks.

The utility model discloses a miniature circuit breaker operating mechanism, which relates to the technical field of low-voltage electric appliances, and comprises a left shell, a right shell, a handle, a lock catch, a contact seat and a moving contact, one end of the handle is linked with a jump pin through a U-shaped connecting rod, the middle part of the jump pin is rotatably connected with the contact seat, the middle part of the lock catch is rotatably connected with a fixed column, and the fixed column is fixedly connected with the left shell. The operating mechanism is of a four-connecting-rod structure, the length and the angle of the connecting rods are adjusted, the length and the angle of the connecting rods are adjusted, the length and the angle of the connecting rods are adjusted, the contact seat is arranged below the lock catch, one side of the contact seat is rotatably connected with the moving contact through the fixing pin, and the reset torsion spring is arranged below the contact seat. The arc voltage can be instantaneously increased and the arc current can be limited during the protection action of the switch, the contact is not easy to break down when the arc voltage is increased, the reliable opening and closing can be ensured, the included angle between the buckling surface of the lock catch and the jump buckle and the horizontal plane is 115-120 degrees, the tripping force is within 1.0 N, and the phenomenon of buckle sliding cannot be caused.

The invention discloses a photovoltaic system DC arc fault diagnosis method and device under multiple operation conditions, and belongs to the technical field of photovoltaic system fault diagnosis. The method comprises the following steps: acquiring time sequence electrical parameters of the photovoltaic system in various operation states, wherein the time sequence electrical parameters comprise direct current inverter current, direct current inverter voltage, arc current and arc voltage; preprocessing the time sequence electrical parameters, and extracting multi-dimensional features including basic statistical features, time-frequency complexity features and time-domain features; and an ensemble learning model is adopted to classify the extracted features, the ensemble learning model comprises an ExtraTrees model and a LightGBM model, prediction results of the two models are fused through an adaptive fusion strategy based on dynamic confidence weighting, and a fault diagnosis result is output. Real arc faults and electrical parameter fluctuation caused by normal operation actions can be effectively distinguished under various operation conditions, so that interference is remarkably reduced, and the detection precision and the arc recognition capability are improved.

The application provides a short-circuit welding method and device. The method comprises: detecting the arc voltage in real time during the short-circuit welding process; determining whether a transient short-circuit abnormality, a top wire abnormality, a long-time arc abnormality, or a continuous short-circuit abnormality occurs in a first welding cycle based on the detection result of the arc voltage; adjusting the current and the duration at the initial stage of the arc and the waveform coefficient of the arc current in the next welding cycle of the first welding cycle when the transient short-circuit abnormality occurs; adjusting the given value of the arc voltage in the next welding cycle when the top wire abnormality occurs; adjusting the arc reference voltage and the arc voltage slope in the next welding cycle when the long-time arc abnormality occurs; and adjusting the given value of the arc voltage in the next welding cycle when the continuous short-circuit abnormality occurs. Through the method, the arc can be stabilized, and the spatter can be reduced. Moreover, the short-circuit transition can be uniform, so that the welding quality is improved.

The present application relates to the technical field of welding process, disclose a kind of laser electric arc composite welding weld penetration control method and system, the method includes: based on the infrared thermal radiation signal of welding pool constructs pool three-dimensional temperature field;Based on the specific element spectral line intensity of the plasma optical spectrum signal in the welding pool, the pool metal vapor concentration is calibrated;The pool three-dimensional temperature field and the pool metal vapor concentration are coupled analysis, and the pool state characteristics of the welding pool are obtained;Based on the pool state characteristics dynamic division laser-arc energy distribution ratio;Based on the laser-arc energy distribution ratio, the offset position of laser focal point in weld depth direction is adjusted, and the arc voltage waveform is adjusted by inverter power supply;The present application can improve the efficiency of a kind of laser electric arc composite welding weld penetration control.

The invention relates to the technical field of automatic operation, in particular to a welding robot welding path optimization method and system based on data driving. The method comprises the following steps: presetting a heat-machine coupling model and setting an initial sensitivity coefficient; welding current and arc voltage are collected in real time in the welding process, instantaneous thermal power is calculated, time integration is carried out, and an accumulated enthalpy value is obtained; inputting the accumulated enthalpy value into a heat-machine coupling model to obtain a theoretical deformation predicted value, and calculating an actually measured deformation estimated value based on a difference value between the arc voltage and the reference voltage; constructing a sliding time window, calculating a residual sequence, and integrating to obtain a drift characteristic value; and updating the sensitivity coefficient based on the drift characteristic value, and correcting the reference position coordinates of the welding robot by using the deformation compensation amount to generate a welding gun position compensation instruction. According to the method, submillimeter-level dynamic compensation of thermal deformation of the workpiece is achieved through a sensitivity self-adaptive correction mechanism of residual integration, and the tracking precision and consistency of a welding path are remarkably improved.