1697 results about "Laser engraving" patented technology

The invention relates to the technical field of machining precision control, in particular to a laser carving precision control method and system.The laser carving precision control system comprises a feature collecting unit, a model building and analyzing unit, a dynamic threshold value adjusting unit and an online incremental learning unit, and the feature collecting unit collects vibration, current and temperature data through a multi-source sensor array; the model construction analysis unit realizes dynamic prediction of processing parameters by combining a bidirectional long-short-term memory network with an attention mechanism, and the dynamic threshold adjustment unit dynamically updates parameters of a numerical control system based on a material hardness real-time detection and thermal coupling model. The online incremental learning unit automatically generates training samples through error data, continuously optimizes model parameters and constructs a'data acquisition-intelligent modeling-dynamic compensation-model evolution 'closed loop, so that accurate prediction and adaptive adjustment of machining parameters are realized, and the adaptability of the manufacturing process to multi-variety and small-batch working conditions is remarkably improved.

The invention relates to the technical field of laser engraving, and discloses a laser engraving method and system capable of automatically correcting coordinates of a galvanometer and a camera, and the method comprises the following steps: calculating a target conversion coefficient based on a calibration size and a pixel size of an image collected by the camera, and controlling the galvanometer to perform laser etching on a cross mark on the surface of a PCB (Printed Circuit Board), recording origin data of a galvanometer coordinate system; adjusting the position of the camera to enable the cross center of the view of the camera to coincide with the cross mark, and calculating the coordinate offset; coordinate space transformation is carried out on all the points to be machined, and galvanometer marking coordinate data are obtained; after laser engraving is carried out on the galvanometer marking coordinate data, an engraving area image is collected, the position residual error and the size proportion deviation are calculated, laser engraving is carried out again, and a laser engraving result is obtained. The technical problem that the visual positioning coordinate and the galvanometer marking coordinate in the laser engraving system are not consistent is effectively solved.

The invention relates to the technical field of the manufacturing industry, and discloses a high-integration variable-focus laser engraving control method and system, and the method comprises the steps: carrying out the high-frequency data collection of the surface of a workpiece through a sensor array, and obtaining an initial surface state data set; and analyzing surface tiny differences by using the feature extraction model, and determining a dynamic trend distribution diagram. A real-time monitoring technique is employed to track the surface change, and focus position correction is triggered when it is detected that the height fluctuation exceeds a threshold. And adjusting the focus position according to a deviation correction algorithm, and driving an execution mechanism to carry out real-time correction. And the processing effect is analyzed and evaluated through data comparison, a parameter optimization instruction is generated, and the dynamic adjustment control model is called to finely adjust operation parameters. And finally outputting a processing quality evaluation result, and generating a complete log file. Real-time precision monitoring and dynamic adjustment in the complex surface machining process are achieved, the machining precision and stability are improved, and the high-end manufacturing standard requirement is met.

The invention relates to a system and method for the digital authentication and / or digital enhancement of real-world physical items by integrating laser engraving, blockchain, optical scanning, multi-component code verification and information processing technologies to create permanent, secure, connected asset identifiers in both digital and physical formats for physical item anti-counterfeiting, anti-theft, item provenance and information storage applications. The present invention also relates to a system and method for the creation of unique non-fungible digital tokens which can be permanently connected or paired to unique physical items in the real world via the use of laser engraving techniques and multi-component information or QR code designs that are laser engraved on a physical item, and then optically scanned by anyone with a smartphone. The present invention also relates to a system and method that integrates non-fungible digital token software technology with laser engraving hardware techniques and multi-component information processing methods for the secure, permanent and traceable digital proof of ownership of a unique physical item, and also for physical data security protection against the forgery, copy or theft of unique digital information codes, digital asset data and non-fungible digital tokens that are connected or paired to unique physical items.

The invention relates to the technical field of laser processing, in particular to a double-laser processing device. Comprising a first laser transmitter and a second laser transmitter, the laser engraving machine further comprises a laser engraving head, a rear reflector switching mechanism, a middle reflector switching mechanism and a front reflector adjusting mechanism. The front reflector adjusting mechanism comprises a first front reflector, a second front reflector and a front adjusting mechanism; the middle reflector switching mechanism comprises a first middle reflector, a second middle reflector and a middle switching mechanism; the rear reflector switching mechanism comprises a first rear reflector, a second rear reflector and a rear switching mechanism. By arranging the reflector switching mechanism, when different lasers need to be used, the corresponding reflectors are switched, the absorption loss of the lasers can be effectively reduced, and the laser utilization rate is improved.

A separating structure of a laser engraving machine having a base seat, a transport mechanism, and a separating mechanism. The base seat has a waiting area for the workpieces being stacked and a processing area, the transport mechanism includes a driving source and a transfer member electrically connected to the driving source, the transfer member carries the workpieces, the separating mechanism is arranged on the waiting area and has two forks that are capable of switching between a standby position and a detached position. When the forks are located at the standby position, the workpieces are stacked on the transfer member. When the forks are located at the detached position, the forks carry the other workpieces above the workpiece carried by the transfer member, the driving source drives the transfer member to move to the processing area for processing the workpiece.

A laser and cutting machining apparatus includes a laser cutting device, and the laser cutting device includes a housing, a guide plain shaft, and a machining mechanism. The guide plain shaft is arranged in the housing, and the machining mechanism includes a laser shell slidably connected to the guide plain shaft, a laser device arranged in the laser shell, and a cutter mechanism arranged in the laser shell; the laser device and the cutter mechanism is movable with the laser shell along the guide plain shaft relative to the housing. The laser and cutting machining apparatus integrates the laser device and the cutter mechanism, is simple and convenient to operate, and can perform laser engraving and cutter cutting on a workpiece by a laser or a cutter, thereby achieving the tabletop and miniaturized configuration of the laser and cutting machining apparatus.

The invention belongs to the technical field of droppers, and particularly relates to an intelligent pre-assembling platform and a pre-assembling method for an integral dropper of a contact network, and the intelligent pre-assembling platform comprises an automatic feeding system, an automatic laser etching system, a mechanical arm flexible assembling system, a tension / length detection system, a crimping process detection system, a bundling and labeling system, a rack, an auxiliary device and a quick-changing device, the dropper wire feeding system comprises a wire feeding wheel, a wire winding device, a straightening device, a fusing device and a servo length control device; the mechanical arm flexible assembly system comprises a six-axis mechanical arm and a crimping quick-change device; the auxiliary device comprises a secondary positioning mechanism, a heart-shaped ring / crimping pipe spacing control mechanism and a transfer printing device; the quick-change device is composed of a hydraulic cylinder, a crimping die and a quick-change transition block. According to the invention, the pre-assembling time of a single dropper is shortened, the dropper assembling process is shortened, the dropper pre-assembling device is suitable for dropper pre-assembling with different specification requirements, a crimping die is convenient to replace, meanwhile, personnel distinguishing is convenient, and finished products are not damaged in the bundling process.

The invention relates to the technical field of laser engraving, and discloses copper-plated steel roller surface embossing laser engraving equipment and an embossing plate roller manufacturing method.The copper-plated steel roller surface embossing laser engraving equipment comprises a bottom plate. The carving machine comprises a bottom plate, a plurality of fixing frames arranged on the side wall of the bottom plate, supporting plates arranged on the two corresponding fixing frames and carving units arranged on the supporting plates, and each carving unit comprises a cleaning component and a carving component which are arranged between the two supporting plates; by arranging the cleaning component, the rotating air outlet ring can directly act auxiliary air on welding slag in a carving area in a spiral flowing mode, the welding slag is better blown out of the carving area, the blown welding slag is collected in the collecting box through mutual cooperation with the collecting assembly, the blown welding slag is prevented from falling into the carving area again, and the carving efficiency is improved. And the engraving precision and the production quality are effectively improved.

The utility model provides a line repairing type high-definition laser plate roller engraving device which comprises a machine frame, a supporting frame is fixedly installed on the top of the machine frame, an X-axis driving mechanism is arranged on the supporting frame, a Y-axis driving mechanism is installed at the moving end of the X-axis driving mechanism, an installation base is installed at the moving end of the Y-axis driving mechanism, and a line repairing type high-definition laser plate roller engraving device is installed on the installation base. A laser engraving head is fixedly mounted on the mounting seat, a rotary clamping mechanism used for concentrically positioning and clamping a plate roller and driving the plate roller to rotate is mounted on the rack through a distance adjusting mechanism, and a lifting mechanism capable of lifting the plate roller is arranged on the rack. The distance adjusting mechanism is matched with the rotary clamping mechanism to clamp the printing rollers with different lengths, and during clamping, the axis line of the printing roller can be quickly positioned, so that the axis line of the printing roller and the axis line of the rotary shaft rod are positioned on the same straight line, and the engraving precision is further ensured.

The utility model discloses a circuit board bearing jig and processing equipment, and belongs to the technical field of laser engraving, in the circuit board bearing jig, a driving assembly drives a negative pressure adsorption platform to be lifted, so that the negative pressure adsorption platform jacks up a circuit board to be separated from a conveying mechanism, the circuit board is supported on the negative pressure adsorption platform, and the circuit board is clamped on the negative pressure adsorption platform; the adsorption force generated by the negative pressure adsorption platform enables the circuit board to be flatly laid on the negative pressure adsorption platform and to be fixed, thereby preventing the circuit board from warping, and improving the position precision and the yield of two-dimensional code engraving. In addition, the circuit board is fixed through pressure difference generated by adsorption, and compared with a mechanical clamping and fixing mode, the surface quality of the circuit board is protected.

The invention relates to the technical field of laser processing, in particular to a linear laser engraving method and a laser engraving machine. The linear laser engraving method comprises the steps that a laser engraving path is obtained according to an engraving line pattern, the laser engraving path comprises a plurality of line segments, and the laser engraving path is split into a plurality of target line segment laser engraving paths; acquiring a moving path of a laser engraving head according to the laser engraving path; in combination with the engraving parameters, speed changes of the laser engraving head when the laser engraving head goes through the laser engraving paths of the target line segments are obtained; and the moving path or / and the laser projection state of the laser engraving head are / is adjusted, so that the energy per unit length of the laser projected to the laser engraving path of the original target line segment is within the error range. The carving depth of the carved pattern is consistent, and the visual sense is good.

The invention relates to the technical field of electronic recording carriers, in particular to an RFID electronic tag and a manufacturing method thereof. The method comprises the following steps that a small antenna packaged with a chip is attached to the attaching surface of bearing base cloth and fixed through dispensing, wherein non-imitation cloth of the bearing base cloth is composed of fabric; pressing the pressing cloth strip and the bearing base cloth through a roll-to-roll pressing process, so that the pressing cloth strip covers the electronic tag body and forms a clamping and fixing structure; arranging a plurality of electronic tag bodies on a base band in an array form, and conveying the electronic tag bodies to a roll-to-roll detection device to carry out functionality and consistency testing; after the test is completed, carrying out surface printing, laser code engraving and UV code printing on the electronic tag body; and obtaining target product information and writing the target product information into the RFID chip. According to the invention, efficient production of the RFID electronic tag is realized through a roll-to-roll pressing and fixing technology, so that the production efficiency is improved, and the tag identification performance and traceability are improved.

The automatic laser engraving equipment comprises a tire conveying mechanism, L-shaped fixed supporting plates are arranged on the two longitudinal sides of the tire conveying mechanism, a fixed mounting frame is arranged between the tops of the L-shaped fixed supporting plates, and a laser engraving assembly is slidably connected between the two transverse ends of the top of the fixed supporting frame in the longitudinal direction; an overturning assembly is arranged on one longitudinal side of the laser engraving assembly and is in sliding connection with the top of the fixed mounting frame in the longitudinal direction. The device has the beneficial effects that the device is reasonable in design, stable and firm in overall structure and high in practicability; the rubber tire laser engraving device is simple in structure, convenient to use, capable of achieving double-face laser engraving of the rubber tire and improving the rubber tire production and machining efficiency, capable of positioning and clamping the rubber tire so as to guarantee the position stability of the rubber tire in the laser engraving machining process and improve the effect and precision of laser engraving machining of the rubber tire, and suitable for application and popularization.

The invention discloses a preparation process of a sintering kiln silicon carbide guide roller with thermal shock resistance and high-temperature corrosion resistance. The process comprises the following steps: sequentially carrying out surface pretreatment such as reticulate pattern laser engraving, sand blasting and cleaning and drying on a silicon carbide guide roller substrate; performing plasma spraying on a pure aluminum oxide coating after preheating; carrying out segmented laser remelting on the coating to improve the compactness; and finally, coating the nano silicon carbide slurry, calcining and curing. The thermal shock resistance and the high-temperature corrosion resistance of the guide roller are remarkably improved by enhancing the binding force of the coating through laser engraving, optimizing the density of the coating through laser remelting and combining post-treatment of nano silicon carbide slurry, and the service life of the guide roller in a lithium battery positive electrode material sintering kiln is prolonged.

The invention discloses a focusing method of a laser, a focusing control device and laser etching equipment, and the focusing method of the laser comprises the steps: taking a current reference height as a starting point, and determining a plurality of different laser heights of the laser according to a current height adjustment step pitch; at each laser height, a laser device is controlled to form a plurality of light spots through laser etching, and the average diameter of the light spots corresponding to each laser height is determined; determining whether the laser height corresponding to the minimum light spot average diameter meets a preset focusing qualification condition or not; if not, the next reference height and the next height adjustment step pitch are determined according to the size relation of the light spot average diameters corresponding to the multiple different laser heights, and the steps are repeated till the laser height corresponding to the minimum light spot average diameter meets the preset focusing qualification condition. According to the technical scheme provided by the invention, laser focusing is accurately and efficiently completed, and the stability and improvement of the laser etching process quality are ensured.

The invention relates to the technical field of PCB inspection, and discloses a laser engraving device of a PCB appearance detection system, the laser engraving device comprises a fixing frame, the upper surface of the fixing frame is fixedly connected with a first motor, the output end of the first motor is fixedly provided with a rotating rod, the outer wall of the rotating rod is fixedly connected with a rotating plate, and the rotating plate is fixedly connected with a rotating shaft. A first rotating shaft is fixedly connected to the interior of the rotating plate, a rotating block is rotatably connected to the outer wall of the first rotating shaft, a second rotating shaft is fixedly connected to the interior of the rotating block, a sliding plate is rotatably connected to the outer wall of the second rotating shaft, a limiting block is fixedly connected to the upper surface of the sliding plate, and a limiting strip is slidably connected to the interior of the limiting block. The first motor is started to drive the rotating rod to rotate, through cooperation of the rotating plate, the first rotating shaft, the rotating block, the second rotating shaft, the sliding plate, the limiting block, the connecting plate, the spring and the clamping plates, the distance between the clamping plates is adjusted, the effect of being suitable for PCBs of different sizes and fixing the PCBs is achieved, and the stability in the transferring process is guaranteed.

Embodiments of methods of creating a gasket for parts used in semiconductor processing are provided herein. In some embodiments, a method of creating a gasket includes: applying an elastomer material on a surface of a part used for substrate processing; and laser engraving the elastomer material to form the elastomer gasket to define a sealing surface on the part.

The invention discloses a laser engraving machine, and belongs to the technical field of laser engraving. A laser engraving machine comprises a base and further comprises an outer cover fixedly installed at the upper end of the base, an engraving head is installed in the outer cover, and a base fan is fixedly provided with a laser emitter matched with the engraving head. The mounting seat is fixedly connected to the base, a mounting groove is formed in the mounting seat, an engraving disc is mounted at an upper end opening of the mounting groove, through holes which are uniformly distributed are formed in the engraving disc, negative pressure holes are formed in the rear wall of the mounting seat, and the air suction ends of the negative pressure holes face the mounting groove and the upper surface and the lower surface of the engraving disc. A pollution discharge hole communicated with the mounting groove is formed in the bottom of the base; a workpiece is automatically adsorbed to the surface of the engraving disc, the workpiece can be automatically fixed, in the engraving process, even if small-amplitude vibration occurs, an engraved object cannot move, and then the engraving precision is guaranteed.

The present invention relates to the technical field of laser processing, and particularly to a dual-source laser engraving machine. It includes a frame, on which there are two laser emitters, a front mirror assembly, a laser engraving head, and an intermediate mirror unit; the two laser emitters respectively emit a first laser and a second laser; the front mirror assembly includes a first front mirror and a second front mirror, and a displacement mechanism for changing the position of the first front mirror or / and the second front mirror; the intermediate mirror unit includes a first intermediate mirror and a second intermediate mirror, and further includes a switching mechanism for switching the positions of the first intermediate mirror and the second intermediate mirror; the displacement mechanism is connected to the switching mechanism through a transmission unit and acts synchronously. The intermediate mirror unit of the present invention can effectively reduce the loss of the laser and improve the utilization rate by setting the ability to switch the first front mirror and the second front mirror.

The invention relates to the technical field of flexible sweat sensors, in particular to a preparation method and application of a laser-induced graphene oxide nanofiber membrane. Comprising the following steps: S1, preparing a graphene oxide nanofiber membrane through an electrostatic spinning process; s2, carrying out laser reduction on the graphene oxide nanofiber membrane, namely engraving an electrode pattern on the graphene oxide nanofiber membrane by adopting a laser, and reducing on the electrode pattern of the graphene oxide nanofiber membrane to generate an LGNF electrode; s3, performing hydrophobic treatment on the graphene oxide spinning fiber membrane; s4, catalytic particles and enzyme are modified on the LGNF electrode, and the laser-induced graphene oxide nanofiber membrane is prepared. The method is simple, efficient, convenient and easy to implement, low in requirement for manufacturing equipment and capable of well achieving mass production, and the sensor prepared through the method can spontaneously absorb sweat to the surface of the electrode to achieve sweat monitoring, so that the hydrophilicity of graphene can be effectively improved, and the electrochemical performance of graphene is improved.

The invention discloses an anti-fingerprint scratch-resistant ink coating heat transfer printing process, which comprises the following steps of: heating and melting modified ink, coating the modified ink on transfer printing paper, drying, engraving a design pattern by using laser, adhering the transfer printing paper and a transfer printing base material, carrying out hot-pressing transfer printing, and irradiating by using ultraviolet light to finish ink heat transfer printing. The modified ink is prepared from the following raw materials in parts by weight: 20-30 parts of modified resin, 20-25 parts of flax wax, 15-20 parts of beewax, 15-20 parts of castor oil, 8-10 parts of a reinforcing additive, 3-5 parts of modified filler, 1-1.5 parts of KH570, 0.5-1 part of benzoin diethyl ether and 15-20 parts of pigment, and the raw materials are subjected to double-bond polymerization in the raw material mixing and illumination process, so that the cross-linking curing sites of the ink are increased; through cooperation with a layered structure of a modified filler base material graphene, the scratch resistance of the ink is improved, and meanwhile, the reinforcing additive contains flurane, long-chain alkyl and polysiloxane chain segments, so that residues of fingerprints on the surface of the ink can be reduced.

The invention discloses a wheel hub supporting device for wheel hub laser engraving, and relates to the technical field of laser engraving cutting machines, a wheel hub is clamped through an electric telescopic rod, a fixing plate, a sliding rod and a clamping plate, when the clamping force is too large, the clamping plate is stressed to move inwards to be matched with the sliding rod, a limiting rod and a clamping groove plate, so that the fixing plate cannot continue to move forwards; when one side of the hub is engraved, the clamping plate stops moving, in this way, the clamping plate conducts anti-clamping measures on the hub during clamping, improper clamping possibly enables the hub to locally bear overlarge stress, and hidden damage such as microscopic cracks is generated on the surface or the internal structure of the hub. The whole fixing device is turned over through the driving frame and the electric telescopic rod, namely, a hub is turned over, the whole production process can be smoother through turning-over operation, the equipment downtime caused by hub assembling and disassembling is shortened, and the equipment utilization rate and the production efficiency are improved.

The invention discloses a primary impedance qualification design method for a PCB (Printed Circuit Board) process, which comprises the following steps of: measuring a medium thickness gradient, slicing a sample on a laminated PCB, measuring the thickness of a medium layer at each point by adopting a metallographic microscope, recording a board edge region, importing measured data into CAM (Computer Aided Manufacturing) software to generate a medium thickness distribution cloud picture, and dividing a compensation region; surface copper is measured, a thickness gauge is used for measuring the thickness of copper on the plate edge and in the plate after the ceramic plate is ground, and a comparison table of the copper thickness difference value and the line width deviation is established; compensation area division: dividing a board edge area, a transition area and an in-board area on the surface of the PCB by laser engraving; length compensation is carried out, 0.1 mi and 0.3 mi of medium thickness compensation and copper thickness compensation are carried out on the plate edge area, 0.05 mi and 0.15 mi of medium thickness compensation and copper thickness compensation are carried out on the transition area, and the total compensation amount of the plate edge area and the total compensation amount of the transition area are kept to be 0.4 mi and 0.2 mi respectively. The problems that in the prior art, a traditional PCB uniformization compensation design cannot adapt to regional process differences in actual production and multi-impedance-line cooperative regulation and control cannot be achieved are solved.

The invention discloses a multi-mark automatic laser carving method and system combined with industrial vision and a medium, and relates to the related technical field of laser carving, and the method comprises the steps that a product to be subjected to laser carving of an automatic laser carving machine is obtained; generating laser etching content and performing control mining on the laser etching module in combination with the product feature data; performing multi-dimensional risk prediction on the laser etching analysis scheme according to a laser etching risk predictor; if the laser etching risk prediction result does not meet the laser etching risk constraint, variation adjustment is carried out, and a candidate laser etching group is established; a laser etching global optimization mechanism is introduced for optimization analysis, and a laser etching optimization strategy is determined; and the product to be subjected to laser etching is conveyed to a preset position, and the laser etching module is synchronously started to execute the laser etching optimization strategy. The technical problems that in the prior art, the multi-mark product laser etching efficiency is low, the laser etching scheme lacks risk assessment optimization, and the laser etching product quality consistency is poor are solved, and the technical effects that the multi-mark product laser etching automation and production efficiency are improved, and the product laser etching quality consistency and stability are improved are achieved.

The invention discloses a machining control method and system for a laser engraving machine, and belongs to the technical field of laser engraving machines. The machining control method comprises the steps that a closed contour, a gradually-changed filling area and a high-precision edge in a pattern are automatically recognized; a cutting path is optimized in combination with an improved ant colony algorithm and a hierarchical genetic algorithm, and meanwhile, a real-time obstacle avoidance subsystem is included to avoid collision; an S-shaped acceleration and deceleration curve planner and a laser power dynamic compensation model are used for optimizing the motion process and laser output. According to the machining control method for the laser engraving machine, automatic and intelligent control over the whole process from design file import to machining completion is achieved, the machining efficiency and accuracy are improved, and the machining cost and risk are remarkably reduced.

The invention relates to the technical field of laser engraving and discloses a laser engraving control method and device based on laser scanning, and the method comprises the steps that target imaging operation is conducted on a workpiece according to determined target parameters of the workpiece to be engraved, imaging data of the workpiece is obtained, and the target parameters comprise the material, transparency, the current position and the like; according to the imaging data of the workpiece, the target parameters and expected workpiece imaging data, laser engraving parameters corresponding to the workpiece are determined, laser engraving operation is conducted on the workpiece according to the laser engraving parameters corresponding to the workpiece, and a to-be-judged workpiece is obtained; according to the expected workpiece imaging data, whether the to-be-judged workpiece meets the carving success condition or not is judged, and if yes, the to-be-judged workpiece is determined as the target carving workpiece, so that it is ensured that energy of laser on the surface of the workpiece is evenly distributed, and the carving accuracy and uniformity of the workpiece are improved; and therefore, the definition and the edge flatness of the carved pattern are improved, and the carved appearance effect of the workpiece is improved.

The invention relates to a self-adhesion breathable laser-induced graphene film and a preparation method thereof. The self-adhesion breathable laser-induced graphene film is used for electromyographic signal detection. The method comprises the following steps: mixing a PDMS stock solution and a curing agent, coating a PET film with the mixture, covering a PI film, and curing to form the base plate. Then, PI powder and a PDMS solution are mixed, a curing agent and polyethylene glycol are added to adjust the adhesiveness, the mixture is dropped into a base plate after dilution, and vacuum defoaming and spin coating are conducted. The preparation method comprises the following steps: preparing a PEG film, inserting a micro-needle template, curing, pouring an Ecoflex solution, curing again, pulling out the micro-needle template to obtain a PI / PDMS / PEG film with breathability and self-adhesion, performing laser engraving by using a carbon dioxide laser to generate laser-induced graphene, and finally obtaining the self-adhesion breathable laser-induced graphene film. According to the membrane, human body surface electromyogram signals are collected by utilizing the characteristics of high conductivity and low signal-to-noise ratio of laser-induced graphene, the adhesion is adjusted through polyethylene glycol, the air permeability is realized through a microneedle template method, the application scene of a device is expanded, and an electrode patch capable of monitoring for a long time is provided for human body physiological signal detection.

The invention relates to a large-breadth flexible damage sensing material and a preparation method thereof, belongs to the field of intelligent material preparation, and solves the problem that large-scale preparation of the large-breadth flexible damage sensing material is difficult in the prior art. The invention discloses a large-breadth flexible damage sensing material and a preparation method thereof. The large-breadth flexible damage sensing material comprises a flexible substrate layer, a conductive layer and a packaging layer, wherein the conductive layer is superposed on the flexible substrate layer; the packaging layer covers the conductive layer; the conductive layer is made of a laser-engraved polyimide film, a functional laser-induced graphene structure and an auxiliary separation structure which are etched by a laser engraving machine are arranged on the conductive layer, and the auxiliary separation structure comprises a film through hole and an edge cutting line; the large-breadth flexible damage sensing material provided by the invention is high in fineness, stable in performance and capable of meeting large-breadth sensing application, the preparation method of the large-breadth flexible damage sensing material is simple in step and high in preparation efficiency, and the large-breadth flexible damage sensing material which is stable in performance and high in fineness can be prepared in batches.