177 results about "Co2 laser" patented technology

The invention discloses a PCB (printed circuit board) hard board drilling process method, which is characterized in that two lasers with different wavelengths are used for processing a PCB hard board blind hole, one light source adopts picosecond ultraviolet laser, and the other light source adopts CO2 laser; according to the method, by means of the characteristics that picosecond ultraviolet laser has high absorptivity and small focusing light spots on metal materials such as bright copper, high-precision, high-quality and low-heat-influence windowing operation is carried out on the surface of the bright copper, and small blind holes smaller than micrometers are formed; by utilizing the characteristics that CO2 laser has high absorptivity and large focusing light spots on non-metallic materials such as glass fibers, high-efficiency, high-reliability and no-damage bottom copper degumming operation is carried out in a round window after windowing, and a deep blind hole with the depth larger than 0.5 mm is realized.

The invention discloses an HDI micro blind hole laser drilling processing method and system, and relates to the field of HDI drilling processing, CO2 laser drilling is firstly carried out on a plate, then UV laser shaping is carried out, finally quality detection is carried out, and the core is that a plurality of local datum points distributed in a matrix mode are preset on the HDI plate to be processed. In the CO2 laser drilling process, the drilling task and the positioning action of the local datum point are executed alternately through a control program. By periodically measuring the actual position of the adjacent local datum point in the machining period, the dynamic position offset generated in the area due to the heat effect can be captured in real time, and the machining coordinates of the follow-up target drilling point in the area can be corrected in real time through the offset. The continuous local dynamic compensation effectively overcomes the dynamic thermally induced deformation problem which cannot be handled by the traditional single global correction, so that the drilling precision in the large-size and high-density machining process is ensured.

The invention discloses a high-precision circuit board laser drilling process, and particularly relates to the technical field of circuit board processing, and the high-precision circuit board laser drilling process comprises the following steps: step 1, selecting a high-quality base material and a copper-clad layer, and carrying out pretreatment on the base material, the pretreatment comprises cleaning and deoxidation, and the interaction efficiency of laser and the material is improved; 2, according to the design requirement of the circuit board, the position needing to be drilled and the aperture size are determined and completed through CAD software, a drilling data file is generated, the circuit board to be drilled is fixed to a drilling machine, and it is guaranteed that the board face is smooth and free of deformation; thirdly, a CO2 laser is selected, light beam focusing, laser power stability and laser beam uniformity of laser drilling equipment are optimized, and stability and accuracy of laser are guaranteed. According to the invention, high-precision laser drilling processing can be realized, the drilling processing quality of the circuit board can be ensured, the processing defective rate is obviously reduced, the popularization and the use are facilitated, and meanwhile, the method is suitable for a modern production process.

The invention belongs to the technical field of mid-infrared photoelectric detectors, and particularly relates to a mid-infrared photoelectric detector based on an ultra-thin metasurface and a preparation method thereof.The method comprises the steps that firstly, a substrate and an element atomic material are provided, an ellipsometry test is conducted to obtain dielectric functions of the substrate and the element atomic material, the dielectric functions serve as input to be substituted into finite element software, and the finite element software serves as the input to obtain the ultra-thin metasurface-based mid-infrared photoelectric detector; theoretical modeling design is carried out on the metasurface, the metasurface is manufactured after the appropriate metasurface size is obtained, then reflectivity and transmissivity tests under different polarizations are carried out on the metasurface through an ellipsometry test, a metal layer is deposited on the metasurface through a standard electron beam evaporation technology to serve as an electrode, and the metasurface is manufactured. And finally, a CO2 laser is selected to irradiate the metasurface in a photoelectric detection experiment. By optimizing the structure parameters and the material performance of the metasurface, middle and far infrared broadband absorption, efficient photo-thermal conversion and photoelectric response are achieved, and therefore the problems that in the prior art, the corresponding wavelength is short, devices are heavy, and the detection efficiency is insufficient are solved.

The invention belongs to the technical field of laser wire stripping machines, and particularly discloses a deflection type double-head laser wire stripping machine which comprises a first machine frame and a second machine frame, the second machine frame is arranged on one side of the first machine frame, a cutting mechanism is arranged on the inner side of the first machine frame, and a placing table is fixedly connected to the top of the second machine frame; the cutting assembly is arranged, the double-laser-source modules adopt beam splitter prisms or double independent optical fiber lasers, CO2 laser and optical fiber double-waveband combination is supported, different insulation and metal materials are adapted, a driving motor is used for driving a rotating shaft to drive a connecting rod to rotate, and the two double-laser-source modules are driven to rotate by + / -30 degrees through mechanical deflection to reduce cutting dead angles. And the CCD measuring module is used for detecting the outer diameter of the wire rod and feeding back the detection result to a console, so that a worker can conveniently adjust the rotating angle of the double-laser-source modules, the cutting effect is improved, and the machining efficiency can be effectively improved through synchronous operation of the two double-laser-source modules.

The invention relates to the technical field of precision and ultra-precision machining, and discloses a CO2 full-laser machining device and method for a fused quartz micro convex lens array. The three-axis motion platform is arranged on the supporting platform; the pulse CO2 laser is used for generating a processing laser beam; the light beam transmission system sequentially comprises a light beam combining module, a light beam adjusting module, a light splitting module, a light beam guiding module, a scanning galvanometer and a focusing field lens along a laser beam path; the main light beam is guided to the scanning galvanometer through the light beam guiding module and is emitted to a fused quartz workpiece after being focused through the focusing field lens; the contour detection unit is used for taking morphology data of the micro-lens array in situ; the temperature monitoring unit is used for measuring the temperature of the processing area; the control unit is connected with the three-axis motion platform, the contour detection unit, the temperature monitoring unit and the pulse CO2 laser, and is used for adjusting the laser power and the displacement of the three-axis motion platform according to detection data; the device has the characteristics of high efficiency, high precision, non-contact processing and small heat influence.

The invention relates to the technical field of laser beam shaping, discloses an active test method and system for a circuit breaker, and is used for solving the problem that the self-adaptive shaping capability of a CO2 laser beam is difficult to improve by the existing method. Firstly, a stable light path is constructed, and the stability of the light path is ensured through mechanical limiting, a thermal management module and multi-stage optical alignment; then low-power calibration is carried out, a deformable mirror initial driving table is generated through a least square inversion algorithm, and a flat-topped beam reference is established; data are collected through a wavefront sensor, a high-order mode is reconstructed, the voltage of a deformable mirror is dynamically refreshed, and wavefront control and scanning motion synchronization is ensured in combination with scanning galvanometer time sequence synchronization, closed-loop control and exception handling; monitoring the temperature of the deformable mirror, starting water-cooling adjustment, and correcting the driving table to cope with the heat effect; finally, a safety system is constructed, laser power, wavefront distortion and deformable mirror stroke parameters are monitored, dry gas purging is conducted on the diffractive optical element regularly, and safety guarantee and performance verification of the whole process are achieved.

Process for manufacturing of LIG-electrodes suitable for manufacturing electrodes in fuel cells, in batteries or as electrochemical sensors through carbonization of polymers by CO2 laser treatment under ambient conditions, LIG-electrodes obtainable by such process and their uses in the electrochemical field.

The invention discloses a CO2 laser and ultrafast laser hybrid welding system and method and a welded quartz glass optical element. The method comprises the steps that S1, at least two to-be-welded materials are clamped so that to-be-welded interfaces can make close contact; s2, ultrafast laser is adopted to conduct instantaneous heating and melting on the local area of the interface to be welded in the action area of the low-flux CO2 laser, and meanwhile auxiliary heat is provided by the low-flux CO2 laser; s3, after ultrafast laser local welding is completed, low-flux CO2 laser is adopted for continuing heating in the action area; s4, the position of the to-be-welded material is adjusted, and the to-be-welded interface which is not welded enters the action area; the steps S2-S3 are repeated until all the to-be-welded interfaces are welded and annealed; and S5, the welding area is naturally cooled, and composite welding is completed. By applying double laser, the temperature gradient is remarkably reduced, and thermal deformation is reduced; and CO2 laser post-welding annealing is carried out, so that the interface stress is effectively eliminated.

The invention belongs to the technical field of optical fiber sensing, and provides an optical fiber microstructure biosensor for detecting alpha fetoprotein and a preparation method thereof, and the method comprises the following steps: step 1, synthesizing a gold nanorod; 2, selecting a single-mode optical fiber for real-time monitoring, removing a coating layer, placing the single-mode optical fiber in a fusion splicer, drawing to obtain a micro-conical optical fiber, enabling CO2 laser to act on a conical waist area of the micro-conical optical fiber to manufacture a cone, taking out the optical fiber, and cooling and curing to obtain an optical fiber microstructure sensor; step 3, immersing a sensing area of the optical fiber microstructure sensor into NaOH, washing and drying, and immersing the sensing area into an MPTMS-ethanol solution; washing is carried out, and then the sensing area is immersed in a GNRs-PEG-COOH solution; washing and drying, immersing the sensing area in an EDC / NHS mixed solution for soaking, washing and drying, and putting the sensing area in an mAb solution for soaking; and washing and drying to obtain the optical fiber microstructure biosensor.

The invention discloses an inner-layer resistor laser cutting and anti-oxidation resistor precision improving processing method, which comprises the following steps: determining laser cutting parameters according to the material, the size and the required resistance value change of a resistor, and making preparation before resistor laser cutting; the prepared resistor is accurately positioned on a laser cutting station table, and a proper cutting method is selected for cutting the resistor on the laser cutting station table; the laser cutting machine is used for cutting the resistor according to preset parameters, the surface of the cut resistor is detected, and the edge of the resistor etched twice is trimmed, so that the precision of the resistor in the width direction can be + / -5 [mu] m, the resistance tolerance is improved from + / -10% to + / -2%, and the precision of the resistor in the width direction can be improved from + / -10% to + / -2%. The laser cutting resistor is used for carrying out size finishing on the finished resistor, the resistor with irregular edges is subjected to CO2 laser light path finishing, the resistor size is neat, the size is better close to the theoretical value width, and after etching and laser finishing of the resistor are finished, resistor layer protection is achieved in the mode that the resistor is covered with resin.

The invention discloses an intelligent temperature control health care patch and a preparation method thereof, and belongs to the technical field of medical instruments. The health care patch comprises a surface layer (a CO2 laser drilling PET film and a fluorosilane coating), a temperature control layer (paraffin / mesoporous silica composite phase change material), a medicine layer (wormwood essential oil-paraffin / sodium alginate microcapsules) and a bonding layer (silicone adhesive / hydrogenated castor oil). Ventilation and sweat prevention are achieved through the laser micropores and the hydrophobic coating, the phase change material composite system provides + / -1.4 DEG C temperature control precision, and the 48-hour medicine volatilization loss rate is only 3.2%. The preparation method adopts vacuum impregnation, low-temperature crosslinking and gradient curing processes, and interlayer bubble-free combination and efficient production are realized. The product has thermal therapy accuracy, medicine long-acting slow release property and skin adaptability, and is suitable for the field of chronic pain and joint nursing.

The invention discloses a remote sensing detection method, device and system for an early fire point, and the method comprises the steps: controlling an aerosol laser radar to scan a target region, and judging whether an aerosol plume exists in the target region or not according to the spatial and temporal distribution of aerosol; when the aerosol plume exists in the target area, the CO2 laser radar is controlled to carry out CO2 concentration detection on the scanning area where the aerosol plume is located, one or more concentration profiles are obtained, CO2 concentration distribution is determined according to the CO2 concentration profiles, and whether a CO2 high-value area exists in the area where the aerosol plume is located or an adjacent area or not is judged according to the CO2 concentration distribution. And when the CO2 high-value area exists in the area where the aerosol plume is located or the adjacent area, the occurrence position of the fire behavior is determined according to the area where the aerosol plume and / or the CO2 high-value area is located. By detecting the joint distribution of the aerosol plume and the CO2 high-value region, the interference of aerosol particles such as cloud and mist is eliminated, the influence of carbon sources such as vegetation can also be eliminated, and the problems of low early fire point recognition accuracy and slow response speed are solved.

The invention provides an electromagnetic field constraint system and constraint method for a CO2 laser amplifier, and the system comprises a spiral electrode which is wound on a discharge tube of the CO2 laser amplifier, the spiral electrode comprises a first DC positive electrode, a radio frequency positive electrode, a second DC positive electrode and a ground electrode which are sequentially and adjacently arranged, and the current flows through the first DC positive electrode in the electric field direction from the first DC positive electrode to the ground electrode. The electric field direction of the current from the second direct current positive electrode to the ground electrode is partially perpendicular to the electric field direction of the current from the radio frequency positive electrode to the ground electrode; the CO2 laser amplifier discharge tube and the Helmholtz coil are coaxially arranged, and the magnetic field direction of the Helmholtz coil is perpendicular to the electric field direction from the radio frequency positive electrode to the ground electrode. In the discharge area of the CO2 laser amplifier, the strong electromagnetic field restraint system is adopted, the vertical alternating high-voltage electric field and the vertical alternating high-voltage magnetic field are used for restraining plasma movement, the electro-optical conversion efficiency can reach about 20%, the CO2 laser power can be effectively improved, and the arc discharge problem under the high radio frequency power injection condition is avoided.

The invention provides a high-precision voltage-stabilizing constant-current power supply for continuous discharge of a CO2 laser, which relates to the technical field of high-voltage voltage-stabilizing constant-current power supplies and comprises a high-voltage direct-current voltage-stabilizing power supply and a high-impedance amplification loop. The high-voltage direct-current voltage-stabilized power supply is boosted by a transformer, rectified by a rectifier bridge and stabilized by a filter capacitor, and continuously adjustable high-voltage output of 0-30kV is provided; the high-impedance amplification loop is composed of an operational amplifier, a three-stage triode amplification circuit and an electronic tube, the output impedance reaches up to 650 megohms, and the high-impedance amplification loop has the excellent constant-current characteristic. The power supply can accurately adjust the output current in the range of 0-30mA, the current fluctuation is less than one thousandth, the power supply can continuously and stably operate for more than 18 hours, and the power supply is suitable for laser discharge control in a high-temperature and high-density plasma environment. According to the invention, high-precision output is realized by adopting common performance devices, the advantages of voltage resistance, overload resistance and cost are considered, and the problems of poor current stability and inconvenient adjustment of a traditional laser power supply are solved.

The utility model discloses a modularized CO2 laser ink-jet printer, which relates to the technical field of laser ink-jet printing and comprises an ink-jet printer main body, a second moving mechanism is mounted at the bottom of the ink-jet printer main body, and a first moving mechanism is mounted at the bottom of the second moving mechanism. By means of the design, rapid installation and disassembly of the code spraying device body are guaranteed, the modular replacement efficiency is improved, later maintenance and replacement of different types of code spraying devices are facilitated, in addition, a second moving plate has the function of flexibly adjusting the position of the code spraying device through pushing of a second air cylinder, and the code spraying device is convenient to use. Accurate positioning of the code spraying device under different working conditions is ensured, stable sliding and linear movement of the second moving plate are further ensured through the guiding effect of the second sliding rail and the limiting rod, deviation and vibration are reduced, and code spraying precision and code spraying definition are improved.

The present invention provides a flexible lactate and pH dual-function sensor and its preparation method and application. The preparation method comprises the following steps: (1) coating a mixed slurry of hydroxyethyl cellulose and sodium lignin sulfonate on a polyethersulfone film, and using a CO2 laser to engrave the polyethersulfone film to obtain an ‑O‑S / PES‑LIG electrode, wherein the ‑O‑S / PES‑LIG electrode comprises a first functional region and a second functional region. (2) modifying polyaniline in the first functional region and modifying an enzyme immobilization layer composed of Prussian blue and lactate oxidase in the second functional region; (3) arranging a reference electrode in the peripheral area of ​​the first functional region and the second functional region of the ‑O‑S / PES‑LIG electrode, and drop-coating a conductive slurry. The sensor of the present invention has the characteristics of good flexibility and adaptability, controllable enzyme activity, and high structural integration, and can achieve synchronous and accurate detection of key metabolic indicators such as lactate and pH.

The trachea cannula comprises a cannula body, a fixing air bag, an anti-burning air bag and an anti-burning layer, on the first hand, the cannula body can be a hose, the cannula body can directly pass through the glottis, it is avoided that airflow influences the stability of tissue in an operation area, and the operation stability and safety are guaranteed; secondly, an anti-burning air bag can be arranged on the subglottic part, the air pipe and the glottis are directly blocked through the anti-burning air bag after the anti-burning air bag is ventilated, and the subglottic air pipe is prevented from being damaged by CO2 laser in the operation process; thirdly, the surface of the anti-burning air bag is covered with an anti-burning layer made of a contractile flame-retardant material, and serious complications caused by spontaneous combustion induced in the CO2 laser operation process can be prevented; fourthly, through the arrangement of an anti-burning air bag and an anti-burning layer, the gap between the glottis and the airway can be completely sealed conveniently, and the situation that bleeding and seepage flow into the airway in the operation process to cause related complications of the lung is prevented.

The invention discloses an all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive manufacturing. The all-quartz multi-component Raman signal online detection module comprises a node-free negative curvature hollow-core optical fiber with side micropores, a multimode optical fiber, a single-mode optical fiber plated with a ceramic film, a semicircular micro-channel, a quartz slurry packaging layer and a quartz fixing base, a micro-scale micropore is processed on the side surface of a node-free negative-curvature hollow fiber by utilizing picosecond laser, a multimode fiber, the node-free negative-curvature hollow fiber with the side micropore and a single-mode fiber are welded into a whole, the single-mode fiber is ground into a slice by utilizing an optical fiber grinding technology, and a ceramic membrane is deposited on the end surface of the slice single-mode fiber. Picosecond laser is used for scanning the quartz fixing base layer by layer so as to process a semicircular micro-channel for placing the sensor, and CO2 laser is used for scanning, depositing and curing the quartz slurry packaging layer layer by layer so as to package the sensor. According to the invention, the to-be-detected substance is injected into the all-quartz sensor, so that on-line detection of multi-component Raman signals can be realized in high electromagnetic interference environments such as electric power and the like.

The invention provides a variable-depth multi-step ablation inhibition method for CO2 laser ablation knife lines of a fused quartz element, and belongs to the field of laser processing of optical elements. The invention aims to solve the problems that medium-frequency ripples are generated during conventional ablation of a fused quartz element, namely high processing knife lines influence the light transmission, and the service performance of a functional microstructure and the surface quality of a processing element are greatly influenced. According to the method, a processing strategy of gradually decreasing the ablation depth and a dislocation processing method adopted in each step of ablation processing are adopted, so that the height of the ablated knife lines on the processed surface of the fused quartz element can be effectively reduced, the surface roughness after processing is further reduced, the light transmission performance and the light transmission performance of a processed microstructure are improved, and the quality of the processed fused quartz element is ensured.

The utility model discloses gantry type five-axis CO2 laser cutting equipment, and relates to the technical field of laser cutting. Comprising an equipment cabinet, an upper cover is fixedly connected to the top face of the equipment cabinet, a five-axis movement mechanism, a clamping jig and a laser are arranged in the upper cover, a light outlet nozzle used for conveying laser emitted by the laser is installed at the end, facing the clamping jig, of the five-axis movement mechanism, and the five-axis movement mechanism is arranged above the clamping jig; an automatic roller shutter door is installed on one side of the upper cover, a U-shaped groove is formed in the top face of the side, facing the automatic roller shutter door, of the equipment cabinet, and a smoke suction mechanism is arranged on the inner wall, facing the automatic roller shutter door, of the U-shaped groove. A feeding mechanism used for conveying the PE film is arranged on one side of the equipment cabinet, and the feeding mechanism is arranged on one side of the automatic roller shutter door and communicates with the U-shaped groove. The special-shaped component machining device is suitable for various shapes, can effectively machine complex special-shaped components in a wider compatible range, and can meet various parameter requirements.

The utility model relates to the technical field of optical fiber cladding processing, in particular to CO2 laser etching optical fiber cladding processing equipment which comprises a machine frame and an optical fiber body, two clamping assemblies used for clamping the optical fiber body are symmetrically arranged on the front side of the machine frame, and an X-axis overall driving mechanism used for driving the clamping assemblies to move is fixedly installed at the inner bottom of the front side of the machine frame. According to the device, an ablation mechanism and a scattering mechanism are combined, high-efficiency stripping of cladding light power is achieved, the performance of an optical fiber in laser transmission, sensing and other applications is greatly improved through the characteristic, energy loss and signal interference caused by cladding light are effectively reduced, the CO2 laser ablation technology is adopted, and the laser ablation efficiency is improved. The device can accurately control the distance and the ablation depth in the etching process, optical fibers with different specifications and requirements can be finely processed by adjusting parameters of the laser emission assembly, it is ensured that etching of each part meets the preset standard, and the consistency and stability of processing are greatly improved.

This application provides a sheet-like spinel cobalt ferrite, its preparation method, and its application, belonging to the field of solid oxide battery technology. In this application, a Co source and an Fe source are dissolved in deionized water, citric acid is added and stirred until homogeneous, then heated in a water bath until the solution becomes a reddish-brown transparent gel. The gel is then dried and ground to obtain a first powder. The first powder is then subjected to two CO2 laser-induced oxidation processes in air at a laser power of x to obtain a second powder. Wherein, 4W < x ≤ 10W. Finally, the second powder is washed and dried to obtain a sheet-like spinel cobalt ferrite. Compared with ordinary spinel cobalt ferrite, using the aforementioned sheet-like spinel cobalt ferrite as a cathode material in SOFC can reduce the polarization impedance of the battery by 0.023 Ωcm. 2 The maximum power density increased by 0.38 W / cm². ‑2 This improves the oxygen reduction activity and stability of SOFCs. Furthermore, using CO2 laser-induced methods simplifies the preparation process, reduces time costs, and increases production efficiency.

This invention provides a sterile filling method and system that avoids or reduces the risk of disinfectant residue and achieves effective sterilization in a short time. One sterile filling method is a method for filling a sterilized container with contents, comprising: laser irradiation treatment, irradiating the container or container preform with a CO2 laser to sterilize the container surface; and filling treatment, filling the container with contents.

The present invention discloses a CO2 band ultra-low absorption double-sided anti-reflection film and a preparation method thereof, and a CO2 laser band ultra-low absorption double-sided anti-reflection film, wherein the structure of the film is: Air / qHpL / Sub / pLqH / Air; wherein Sub represents a substrate; H represents a high-refractive-index film material ZnSe film layer; L represents a low-refractive-index film layer, and L is a mixed film layer of two low-refractive-index film materials L1 film layer and L2 film layer. The refractive indices of the two low-refractive-index film materials L1 film layer and L2 film layer are both 1-1.6. The low-refractive-index film material L1 film layer and the low-refractive-index film material L2 film layer are made of different materials. The optical thickness ratio of the low-refractive-index film material L1 film layer: the low-refractive-index film material L2 film layer is controlled within a range of 1:3-1:6. The present invention coats a film system on both sides of the zinc selenide substrate and combines two low-refractive index film materials for mixed plating to achieve 10600nm anti-reflection, reduce absorption, and improve transmittance. The average transmittance is greater than 99.7%, the single-side reflection is less than 0.1%, and the absorption is reduced from the original 0.3% to less than 0.1%. The laser damage threshold is tested from the original 6000W / CM 2 Increased to 10000W / CM 2 .

The invention discloses a circuit board processing method and a circuit board. The method comprises the following steps: carrying out plasma cleaning on a copper-clad substrate and spraying a nano-scale photo-sensitive adhesive; engraving a circuit pattern by using femtosecond laser, and selectively etching a copper layer in combination with an ultrasonic-assisted acidic etching solution; through holes are formed through a CO2 laser and mechanical drilling composite process, and hole metallization is realized by adopting chemical copper plating and pulse electroplating; copper ion recovery and etching liquid regeneration are carried out on the waste etching liquid, and meanwhile, supercritical CO2 fluid is adopted for cleaning and stripping the photo-sensitive resist. Through innovative process combination, the problems of low efficiency, high pollution and insufficient precision in the prior art are solved.

The invention provides a three-step polishing method for suppressing high-frequency errors in CO2 laser polishing of a fused quartz element, and belongs to the technical field of laser processing of optical elements. The invention aims to solve the problem that the optical transmission performance and the laser damage resistance of a fused quartz element are severely influenced by medium-high frequency error induced far-field light modulation and high-frequency error induced near-field light field enhancement when the fused quartz element is processed by laser. The method comprises the first step of laser preheating, the second step of high-speed multi-layer polishing and the third step of low-speed single-layer polishing, laser polishing movement tracks and polishing parameters of the corresponding steps are drawn, medium-high frequency and high-frequency errors of the surface of the fused quartz element subjected to laser polishing are greatly reduced, the machined surface almost has no surface knife lines, and the surface quality is improved. And the far-field light modulation and near-field light field enhancement effects are effectively reduced.

The application discloses a paper-based microfluidic intelligent wound monitoring bandage based on a laser-induced graphene electrode array and a preparation and signal processing method thereof. The bandage comprises a calcium alginate / zinc oxide antibacterial base, a wax-printed paper-based lateral chromatographic microfluidic channel layer, a CO2 laser direct writing LIG multifunctional electrode array, a colorimetric indication area, an NFC wireless communication module and a silver nanowire electrically controlled drug release module. The LIG electrode is fixed and modified by enzymes to detect uric acid, lactic acid, glucose and pH value respectively; the paper-based colorimetric disc detects bacterial protease and TNF-alpha; the NFC radio frequency field provides energy to realize battery-free operation. The built-in signal processing method comprises temperature compensation, cross interference elimination, multi-parameter fusion infection risk scoring and double-threshold closed-loop drug delivery decision. The preparation process mainly uses laser direct writing, screen printing and ion crosslinking, has low material cost and is green and environmentally friendly, and is suitable for closed-loop monitoring and treatment of chronic wounds at home and in clinic.

The application discloses a chamfering device and a processing method. The chamfering device comprises a laser emitting assembly, a positioning assembly and a transmission assembly. The laser emitting assembly comprises a laser source and a laser cutting head. The laser source is used for providing a CO2 laser beam for chamfering. The laser cutting head is used for converting the CO2 laser beam into a defocused CO2 laser beam and emitting the defocused CO2 laser beam to a chamfering edge of a workpiece to be processed. The positioning assembly is used for adjusting the relative posture of the laser cutting head and the workpiece to be processed, so that the defocused CO2 laser beam is irradiated to the chamfering edge at a preset incident angle. The transmission assembly is used for driving the relative movement of the laser emitting assembly and the workpiece to be processed, so that the defocused CO2 laser beam moves along the chamfering edge, and the chamfering processing of the chamfering edge is realized. The chamfering device utilizes the defocused CO2 laser beam to irradiate the chamfering edge for chamfering, and has the advantages of good processing environment, no water pollution, no abrasive wear, low noise and the like.

The invention relates to a maintenance method (25) for monitoring and maintaining electric compressors (7), in particular for circulating a laser gas (4) in a CO2 laser system (1), comprising the method steps of: b) reducing (26) a compressor speed (27) of the electric compressor (7) by changing a drive mode of an electric drive unit (22) of the electric compressor (7) into a generator mode; c) determining (32) a speed reduction by detecting the compressor speed (27) as a function of time (30); d) comparing (36) the speed reduction, in particular a deceleration curve (31), with at least one stored reference speed reduction (33); e) outputting (37) a maintenance recommendation on the basis of the comparison from method step d).