63 results about "Carbon dioxide laser" patented technology

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.

The application discloses a kind of carbon dioxide laser pulse signal quality detection and anti-interference control method and system, it is related to the field of device using stimulated emission, this method includes: when enabling effective state indication is effective, external pulse width modulation signal is sampled, and the sequence of multiple-point sampling buffer is obtained, the rising edge and the falling edge of external pulse width modulation signal are determined, and the pulse period measurement value and the pulse width measurement value of current pulse are calculated;Determine the preset duty cycle interval to which the duty cycle of current pulse belongs, and generate a duty cycle interval flag;Measure power measurement value, and compare with the proportional threshold value generated based on current pulse width measurement value, to determine power abnormal state;When power abnormal state is abnormal, determine shielding period in preset mapping table according to duty cycle interval flag, generate protection control signal, and perform anti-interference control to laser. By implementing the present application, abnormal detection and anti-interference control of laser output in a larger duty cycle range can be realized.

The invention discloses a preparation method of a high-sensitivity room-temperature flexible hydrogen sulfide gas sensor, which comprises the following steps: preparing a laser-induced graphene interdigital electrode in one step by using a carbon dioxide laser, depositing tungsten trioxide microspheres on the surface of LIG by using a film pressing technology so as to construct the hydrogen sulfide gas sensor, and forming a P-N heterojunction with the LIG, thereby obtaining the high-sensitivity room-temperature flexible hydrogen sulfide gas sensor. The response amount of the sensor is greatly improved through the heterojunction structure, the theoretical detection limit is as low as 774 ppt, and the actual detection limit is 3 ppb. The preparation method of the high-sensitivity room-temperature flexible hydrogen sulfide gas sensor provided by the invention has the advantages of high sensitivity, working at room temperature, low detection limit and long-term stability of more than seven months, and can be widely applied to the field of wearable gas monitoring.

The utility model discloses a two-fold carbon dioxide laser support, which relates to the technical field of laser supports, and adopts the technical scheme that the two-fold carbon dioxide laser support comprises a two-fold carbon dioxide laser body, two fixed support assemblies are sleeved outside the two-fold carbon dioxide laser body, and each fixed support assembly comprises a support base device; the two-fold carbon dioxide laser support comprises a support base device, a support fixing device is arranged at the top of the support base device, and an adjusting unit is connected between the support base device and the support fixing device. The rotating wheel is rotated, the rotating wheel rotates to drive the threaded column to rotate, the threaded column rotates to enable the lower fixing block to move longitudinally through threaded fit with the threaded groove, then the two-fold carbon dioxide laser body moves longitudinally, and the longitudinal position of the two-fold carbon dioxide laser body is finely adjusted.

The present invention relates to the technical field of heat treatment. A heat treatment device, comprising a furnace, which has an observation window opened on the furnace body and quartz glass inlaid in the observation window; further comprising an industrial personal computer. The industrial personal computer is connected to an infrared temperature imager and a first pan-tilt unit; the first pan-tilt unit is arranged outside the furnace body, and the infrared temperature imager is mounted on the first pan-tilt unit, the infrared temperature imager facing the quartz glass. A light-transmitting window is opened on the furnace body of the furnace. The industrial personal computer is connected to a second pan-tilt unit and a carbon dioxide laser; the carbon dioxide laser is fixed on the second pan-tilt unit, a light outlet of the carbon dioxide laser facing the light-transmitting window. The industrial personal computer uses the infrared temperature imager to capture temperature imaging of a workpiece being processed, identifies a low-temperature region on said workpiece, adjusts the carbon dioxide laser to face the low-temperature region, and starts the carbon dioxide laser to provide supplementary heating.

The utility model relates to the technical field of carbon dioxide laser treatment, in particular to a carbon dioxide laser therapeutic instrument which comprises a machine shell, one side of the top end of the machine shell is in threaded connection with a light guide arm, a touch control screen is embedded in the top end of the machine shell, and a laser power source is installed in the machine shell. A control panel is installed in the machine shell and located on one side of the laser power source, and a circulating cooling mechanism is further arranged in the machine shell. The water tank is made of transparent acrylic, the water level of the water tank can be observed through the front window of the machine shell, when water needs to be added, the funnel is inserted into the water inlet, the water filling function is achieved through the funnel, the ventilation valve is arranged on the water tank and has the function of ventilation and watertightness, and the situation that water cannot be injected due to the fact that a water tank circulation system is a closed system is prevented. Meanwhile, drainage can be completed through the water outlet, and the problem that according to an existing therapeutic apparatus, water injection and drainage are not convenient to conduct in a closed water tank in a closed machine box is solved.

The utility model relates to the technical field of carbon dioxide laser therapeutic instruments, in particular to a water circulation heat dissipation system of a carbon dioxide laser therapeutic instrument, which comprises a case, a display screen is mounted at the top end of the case, a control panel is embedded in the case, and a water circulation heat dissipation mechanism is mounted in the case. The water circulation heat dissipation mechanism comprises a water tank, a water pump, a water flow switch and a laser tube, the water tank is installed on the surface of the case through an installation hoop, the water pump and the water flow switch are fixed to the inner wall of the case through bolts, and the water outlet end of the water pump communicates with the water inlet end of the water flow switch through a pipeline; and a laser tube is arranged on one side of the water flow switch. According to the utility model, the water flow switch is used for displaying and alarming, and laser emission operation cannot be carried out, so that laser emission cannot be carried out in all operations when no water circulation exists in the laser tube.

The invention discloses a carbon dioxide laser safety protection method and system based on directional coupling, and relates to the field of devices utilizing stimulated emission, and the method comprises the steps: collecting a forward signal outputted by a power supply of a carbon dioxide laser and a reverse signal reflected by a load through a directional coupler, and determining a forward voltage and a reverse voltage; calculating a reflection coefficient according to the forward voltage and the backward voltage, and calculating a voltage standing wave ratio according to the reflection coefficient; collecting audio data in the operation process of the carbon dioxide laser through an audio sensor, and extracting to obtain audio features; when the voltage standing wave ratio exceeds a normal operation threshold value, determining a first fault judgment result based on the voltage standing wave ratio; the audio features are matched with a preset fault feature library, and a second fault judgment result is determined; and based on the first fault determination result and the second fault determination result, generating a fault processing instruction and executing the fault processing instruction. According to the invention, the equipment maintenance efficiency can be improved.

The invention discloses a radio-frequency pulse power supply for a radio-frequency carbon dioxide laser, and the power supply comprises an input unit which inputs a radio-frequency signal; the first-stage power amplification unit is used for receiving the radio frequency signal, amplifying power and outputting a first-stage amplified radio frequency signal; the first-stage power distribution unit receives the first-stage amplification radio frequency signal and equally divides the first-stage amplification radio frequency signal into two paths of first-stage distribution radio frequency signals with the same power for output; the second-stage power distribution units are arranged in pairs, receive the first-stage distribution radio-frequency signals, uniformly divide the first-stage distribution radio-frequency signals into two paths of second-stage distribution radio-frequency signals with the same power through voltage reduction and transformation, and output the two paths of second The second-stage power amplification unit receives one path of second-stage distribution radio frequency signal, amplifies power and outputs a second-stage amplification radio frequency signal; the power synthesis unit is used for receiving the four paths of secondary amplification radio-frequency signals and synthesizing the four paths of secondary amplification radio-frequency signals into high-power radio-frequency signals for output through boost transformation; and the output unit receives and outputs the high-power radio frequency signal. Through multi-stage amplification and multi-stage synthesis, pulse signal output with hundreds of watts to kilowatt peak power is realized.

The utility model discloses a carbon dioxide laser with a discharge tube supporting structure, which relates to the technical field of lasers and comprises a gas storage tube, a water cooling tube, a discharge tube, a spiral supporting plate and an elastic supporting blade. A sealing cavity is formed between the water-cooling pipe and the discharge pipe, a water inlet pipe and a water outlet pipe are fixed to the side wall of the water-cooling pipe and are both connected with the side wall of the gas storage pipe in a penetrating mode, the spiral supporting plate is located in the sealing cavity and coaxially arranged on the outer side wall of the discharge pipe in a sleeving mode, the two ends of the spiral supporting plate are arranged in a staggered mode, and one end of the spiral supporting plate is fixed to the inner side wall of the water-cooling pipe. The other end of the spiral supporting plate is fixed on the outer side wall of the discharge tube, and the spiral supporting plate has elasticity along the axis direction of the discharge tube; one end of each elastic supporting blade is fixed on the side wall of the spiral supporting plate, and the other end of each elastic supporting blade abuts against the inner side wall of the water-cooled tube, so that the discharge tube can be prevented from being damaged by impact in the length direction or the radial direction of the laser in the normal use and transportation process of the carbon dioxide laser.

A pulse type carbon dioxide laser control method, system, medium and product, relates to the field of devices utilizing stimulated emission, and the method comprises: collecting a pulse signal of a target laser to obtain historical voltage data; determining a historical reference period, a historical pulse width and a historical peak voltage, and calculating a historical duty cycle; obtaining a pulse signal of a current period to obtain current voltage data and determine a current period starting time; inputting the historical duty cycle, the historical peak voltage and the current voltage data into a data simulation model to obtain a predicted duty cycle and a predicted peak voltage of the current period; determining a maximum allowed duty cycle corresponding to the predicted peak voltage, and taking the smaller value between the predicted duty cycle and the maximum allowed duty cycle as a target duty cycle; calculating a target pulse width and a signal adjustment period; and generating a driving pulse signal and outputting the driving pulse signal to a resonant cavity. By implementing the present application, damage of a triode caused by overvoltage or heat accumulation can be avoided, thereby reducing maintenance cost.

The invention discloses a radio frequency carbon dioxide laser fast switch control method based on acousto-optic modulation, which is applied to a radio frequency carbon dioxide laser and comprises the following steps: initializing system monitoring and parameter configuration; loading a driving signal to generate effective light; comprising the following steps: applying a driving signal to an acousto-optic modulator by using a control module, and exciting ultrasonic waves to form a phase grating in the acousto-optic modulator; enabling a laser beam output by the laser resonant cavity to enter the phase grating at a Bragg angle to form deflected effective light; outputting laser and performing feedback optimization; comprising the steps that laser is output, characteristic parameters of the output laser are monitored, and when it is monitored that the characteristic parameters of the current output laser are lower than target values of the characteristic parameters of the laser, a control module is used for selecting PID control to optimize driving signals; cutting off the driving signal and absorbing invalid light; comprising the steps that when laser output needs to be closed, a control module is used for stopping an acousto-optic modulator from applying a driving signal, and laser output is stopped. According to the invention, the requirements of high-precision and high-speed laser processing can be met.

The invention discloses a carbon dioxide laser tube, which relates to the technical field of laser tubes and comprises a discharge tube, a discharge tube attachment bracket, a water cooling tube, a gas return tube, a gas storage tube, a total reflection mirror, a total reflection mirror tube orifice, an anode, an anode tungsten rod, an output mirror, an output mirror tube orifice, a cathode and a cathode tungsten rod, the discharge tube is arranged in the discharge tube attachment bracket in a penetrating manner; the discharge tube attachment bracket is arranged in the water cooling tube in a penetrating manner; the outer wall of the discharge tube attachment support makes contact with and fixes the water cooling tube, and the inner wall of the discharge tube attachment support makes contact with and fixes the discharge tube. According to the invention, spikes in the background technology are replaced by the discharge tube attachment bracket, so that the straightness of the discharge tube can be ensured, and the laser beam quality, the output power and the cutting performance are improved.

The utility model provides a carbon dioxide laser packaging device, which relates to the technical field of packaging devices and comprises a packaging box and a carbon dioxide laser mechanism, the carbon dioxide laser mechanism is embedded in the carbon dioxide laser mechanism, and the packaging box is provided with a packaging bottom plate at an opening at one end of the carbon dioxide laser mechanism. A packaging top plate is arranged at the opening of the other end of the packaging box, first heat dissipation fins are arranged at the end, close to the carbon dioxide laser mechanism, of the packaging box, the heat dissipation effect of the first heat dissipation fins is improved through a heat dissipation assembly, and during use, by starting a heat dissipation mechanism, external air enters a heat dissipation pipe after passing through an air inlet and a connecting pipe; at the moment, air in the heat dissipation pipe is distributed to each heat dissipation fin under the action of the air outlet, heat volatilization of the second heat dissipation fins is accelerated, in the exhaust process of the heat dissipation pipe, under the action of the sound absorption sleeve, airflow vibration is reduced, and sound generated by airflow blowing out is weakened.

The application discloses a fixing device for transporting negative electrodes of a carbon dioxide laser, relates to the technical field of carbon dioxide lasers, and comprises a tray, a plurality of accommodating grooves are formed in the tray, and each accommodating groove is provided with a clamping structure; the clamping structure comprises two hollow shells and a base, the base is fixed in the corresponding accommodating groove, a centering mechanism for enabling the two hollow shells to approach each other is arranged on the outer side of the base; a soft body one is filled and fixed to the inner side of the hollow shell, and a soft body two is embedded and fixed to the top of the base. The clamping structure adopts a soft wrapping design, that is, the negative electrode is placed in a soft material, and then the soft material wraps the whole negative electrode; the soft material can deform according to the outer contour of the negative electrode, so that better fixing is realized, various specifications of negative electrodes can be wrapped and clamped, the fixture customization is not needed, and the sealing and fixing form can prevent external damage.

This invention discloses an acousto-optic Q-switching method for carbon dioxide lasers, specifically relating to the field of acousto-optic Q-switching of lasers. It addresses the problem that existing Q-switching control methods rely on fixed delays or single feedback, making it difficult to adapt to changes in discharge state, resulting in large pulse energy fluctuations and poor stability. By acquiring and segmenting the voltage and current waveforms within each discharge cycle, multi-dimensional features of the pre-ionization, main discharge, and relaxation stages are extracted to construct a full-cycle state vector. Based on this state vector, a timing prediction network is used to output the Q-switching turn-on delay and acousto-optic diffraction efficiency setpoints for the next cycle, achieving dynamic prediction and adaptive adjustment of Q-switching parameters. This improves the stability and consistency of laser pulse output, enhances peak power control accuracy and adaptability under different operating conditions, while reducing the reliance on manual experience for parameter tuning and improving the long-term reliability and robustness of the system.

The application discloses a kind of carbon dioxide laser signal monitoring and safety protection method and system;The method comprises: collecting the pulse width modulation signal parameter of carbon dioxide laser, power detection information, temperature information and configuration parameter;Based on the various parameters and information collected, multi-level coordinated protection control is carried out;Multi-level collaborative protection control includes: obtaining the state flag of laser, trend early warning flag and configuration bit flag;Based on causal logic, multi-signal linkage and trend verification, fault classification is carried out;According to fault type, model or power level, working condition, safety difficulty and trend early warning flag, five-dimensional determination is carried out to determine fault level;According to fault level, model or power level, working condition and safety difficulty, four-dimensional adaptation is carried out to adapt to different protection actions.The application can realize comprehensive monitoring of carbon dioxide laser parameters, and carry out flexible and multi-level coordinated safety protection control according to the monitoring result.

The utility model discloses an adjustable carbon dioxide laser metal head, which comprises a gas storage tube, a metal head adhered to the positive electrode end of the gas storage tube, a reflecting mirror adhered to the back surface of the metal head, a positive electrode metal cap mounted on the outer side of the reflecting mirror, an adjustable metal head adhered to the negative electrode end of the reflecting mirror, and four adjusting bolts uniformly distributed on the outer diameter of the adjustable metal head, an output lens is pasted on the back face of the adjustable metal head, the adjusting bolt is used for finely adjusting the angle of the adjustable metal head and changing the position of the output lens so as to change a laser light path and adjust the light spot shape, and a negative electrode metal cap is installed on the outer side of the output lens. The adjustable metal head is installed at the negative electrode end of the laser, and forces in four directions are generated on the adjustable metal head by screwing or unscrewing four adjusting bolts located in the circumferential direction of the outer diameter of the adjustable metal head, so that the adjustable metal head is slightly deformed, the position of an output lens is adjusted, a laser light path is changed, and the shape of a light spot is adjusted. And enabling the carbon dioxide laser to output a base film or a low-order film.

The utility model provides a power supply circuit for a radio frequency carbon dioxide laser and wire stripping laser equipment. The power supply circuit comprises a programmable controller, a first resistor and a second resistor, the pulse output end of the programmable controller is used for outputting first PWM voltage, the first resistor and the second resistor are sequentially connected to the pulse output end in series, and the series connection point between the first resistor and the second resistor is connected with the first power supply end of electric equipment through a wire. One end, far away from the series connection point, of the second resistor is connected with a second power supply end of the electric equipment through a wire, and second PWM voltage is provided for the electric equipment through the first power supply end and the second power supply end; wherein the resistance ratio of the first resistor to the second resistor is not smaller than 19: 5 and not larger than 21: 3, and the electric equipment is a radio frequency carbon dioxide laser. Through the PWM power supply circuit, an original programmable controller does not need to be replaced, and under the condition that the original programmable controller is not replaced, the system is suitable for various industrial sites, and the cost is reduced.

The application discloses a ten-thousand-watt radio frequency fast-axis flow carbon dioxide laser, which comprises a discharge electrode and a discharge glass tube with a hollow tube wall; the discharge electrode is arranged on the outer wall of the discharge glass tube; the discharge glass tube comprises a water inlet hole and a water outlet hole, and the water inlet hole and the water outlet hole are communicated with the hollow tube wall to form a cooling water channel; the water inlet hole is arranged at the exhaust end of the radio frequency fast-axis flow carbon dioxide laser, and the water outlet hole is arranged at the air inlet end of the radio frequency fast-axis flow carbon dioxide laser; a radio frequency power supply and a radio frequency adapter are connected with the discharge module and used for adjusting the temperature of the exhaust end of the radio frequency fast-axis flow carbon dioxide laser. The radio frequency adapter is arranged, so that the ten-thousand-watt radio frequency fast-axis flow carbon dioxide laser can reduce the temperature of the high-temperature gas discharged from the exhaust end of the discharge tube in a water cooling mode, the temperature of the air inlet end and the exhaust end of the discharge tube is maintained stable, the laser can obtain higher gain, and the output power of the laser is improved.

The utility model relates to surgical instrument technical field, concretely is a new -type vagina retractor for carbon dioxide laser gynecological operation, including retractor shell, the mirror surface observation mechanism is fixedly installed in retractor shell inside, the retractor shell includes the bottom mounting seat and the tubular body, the tubular body one side is provided with the light -transmitting port in the end, the light -transmitting port is closed window with the open -and -close type buckle, the bottom mounting seat both sides are provided with fixed screw hole, the mirror surface observation mechanism includes mirror surface, fixed block, mounting block, tubular positioning member and light -reflecting area. The light -transmitting port of this retractor is equipped with the closed window, can effectively isolate the body fluid with external environment, avoid cross infection, improve medical security. Through the retractor shell of tubular design, and the retractor shell variable cross section angle region is all round angle design, more accord with the ergonomics principle, the doctor operation is convenient, make the retractor in the use process, can effectively avoid the tissue damage, reduce the patient's uncomfortable feeling.

This application provides a testing device and system for testing the diffusion combustion characteristics of aluminum-containing solid fuel. The device includes an oxidizer supply unit, an ignition unit, and a reaction unit. The oxidizer supply unit stores oxidizer. The ignition unit has a laser emitting section and an angle adjustment section, the angle adjustment section being used to adjust the laser emission angle. The reaction unit has a covering section, a rectifying section, and aluminum solid fuel disposed in the rectifying section. The rectifying section is connected to the oxidizer supply unit, and the covering section is used to cover the aluminum solid fuel in the rectifying section. The observation unit can record the combustion process of the aluminum solid fuel. Through the coordinated design of the oxidizer supply unit, ignition unit, reaction unit, and observation unit, a testing device capable of simulating the diffusion combustion flow field environment of a solid-liquid rocket engine is constructed. The ignition unit is a combination of a carbon dioxide laser and a corner mirror, achieving non-contact precise ignition and avoiding interference with the flow field.

The utility model belongs to the technical field of carbon dioxide laser cutting, and particularly relates to a carbon dioxide laser cutting machine cutting head dustproof device which comprises a side fixing plate, an upper fixing plate and an upper connecting beam are fixedly installed on the inner end face of the side fixing plate, and a front connecting beam, a front opening cover and a rear opening cover are fixedly installed on the inner end face of the upper fixing plate. And a cutting driving mechanism and a dustproof wire groove are arranged in the upper fixing plate. By arranging the cover plate and the dustproof groove, interference of dust on the cutting head is effectively blocked, and the cutting precision and the edge quality are improved; abrasion of dust to the cutting head is reduced, and the service life of the cutting head is prolonged; the dustproof device is simple in structure and easy to clean and maintain, and the equipment maintenance cost is reduced; and the downtime caused by blockage or damage of the cutting head is reduced, and the production efficiency is improved.

The invention provides a high-purity graphene powder mass production device and a manufacturing method, the device comprises a hollow annular pipe body, the annular pipe body comprises a plurality of arc bent pipes and a plurality of connecting pieces, a flow channel is arranged in each arc bent pipe, an annular wall space is arranged in the circumferential annular wall of each connecting piece, and the flow channel is communicated with the annular wall space; the inner side wall of the connecting piece is provided with at least one annular wall flow channel, the annular wall space is communicated with the flow channel through the annular wall flow channel, and at least one arc bent pipe of the annular pipe body is provided with a slot seam. The feeding barrel is arranged above the annular pipe body in a communicating manner; the plurality of fans are correspondingly arranged and connected to the plurality of connecting pieces, each fan is provided with an air outlet pipe, and the air outlet pipes are communicated with the annular wall spaces of the connecting pieces; the carbon dioxide laser irradiators irradiate the annular pipe body; one end of the collecting plate is provided with a particle screen, and the particle screen is designed to correspond to the size and the shape of the flow channel; therefore, excellent production economic benefits can be obtained.

The utility model provides a kind of light beam feedback control device of radio frequency carbon dioxide laser, it is related to the light beam feedback control device technical field of laser, including, laser body, the outer surface of the laser body is provided with moving assembly, the moving assembly includes fixed block, the outer surface of the fixed block is equipped with sliding slot, the inner wall of the sliding slot is slidably connected with slider, the outer surface of the slider is fixedly connected with rotating block.In the utility model, the device is set by moving assembly, motor can drive rotating block to rotate, rotating block will drive mirror to rotate, the light of laser body can be irradiated on mirror through light beam port, mirror will be reflected by round hole, by rotating rotating block and mirror so that the light beam of radio frequency carbon dioxide laser can be rotated at multiple angles, so as to improve the flexibility of the light beam of radio frequency carbon dioxide laser.

The invention discloses a pulse type carbon dioxide laser control method and system, a medium and a product, and relates to the field of devices utilizing stimulated emission, and the method comprises the steps: collecting a pulse signal of a target laser, and obtaining historical voltage data; determining a historical reference period, a historical pulse width and a historical peak voltage, and calculating a historical duty ratio; acquiring a pulse signal of a current period, obtaining current voltage data, and determining a starting moment of the current period; inputting the historical duty ratio, the historical peak voltage and the current voltage data to a data simulation model to obtain a predicted duty ratio and a predicted peak voltage of the current period; determining the maximum allowable duty ratio corresponding to the predicted peak voltage, and taking the smaller one of the predicted duty ratio and the maximum allowable duty ratio as a target duty ratio; calculating a target pulse width and a signal adjustment period; and generating a driving pulse signal and outputting to the resonant cavity. By implementing the application, the triode can be prevented from being damaged due to overvoltage or heat accumulation, so that the maintenance cost is reduced.

The invention discloses a carbon dioxide laser metal head capable of being accurately adjusted, which comprises an adjustable metal head, the adjustable metal head is bonded with a gas storage tube behind the adjustable metal head, a reflecting mirror is arranged at the position, close to the gas storage tube, in the adjustable metal head, and the outer wall of the adjustable metal head is rotationally connected with a plurality of adjusting assemblies with fine-adjusting angles. The adjusting assembly comprises a hollow adjusting screw, a steel ball is arranged in the adjusting screw, a pressing rod is installed below the steel ball, and the pressing rod is connected with the adjusting screw in a screwed mode. A bolt adjusting structure is changed into a combined structure of the adjusting screw, the steel ball and the pressing rod, so that the problems of the original structure in the aspects of adjusting smoothness, adjusting precision, assembling reliability and long service life are solved, and the performance of the carbon dioxide laser is improved.

The application discloses a preparation method of an AgNWs@LiG@PDMS sandwich structure flexible SERS substrate, characterized by the following steps: a carbon dioxide laser is used to prepare laser-induced graphene (LiG), then the LiG is completely transferred to a PDMS flexible substrate through a polydimethylsiloxane (PDMS) transfer strategy, a LiG@PDMS double-layer structure is obtained, silver nanowires (AgNWs) are spin-coated on the surface of the double-layer structure, and finally, the AgNWs@LiG@PDMS sandwich structure flexible surface-enhanced Raman spectroscopy (SERS) substrate is prepared. The advantage of the AgNWs / LiG@PDMS sandwich structure flexible material as the SERS substrate material lies in that the PDMS provides a flexible substrate and has good tensile resistance, but the AgNWS is directly coated on the hydrophobic PDMS surface, and the Ag nanowires are prone to falling off, the LiG layer is beneficial to the deposition and stability of the AgNWS, and the good conductivity of the LiG is helpful to the SERS performance of the Ag nanowires.

The invention discloses a sweat collecting module for absorbing skin sweat. The sweat collection module comprises a first base film, a hydrophilic laser-induced graphene (LIG) layer prepared on the first base film by using a carbon dioxide laser, and a hydrophobic laser-induced graphene (LIG) microarray prepared by carrying out secondary laser scanning on the hydrophilic laser-induced graphene (LIG) layer. According to the sweat collecting module, efficient and active sweat capturing can be achieved, and the module is of a composite structure subjected to precise patterning design. The super-hydrophobic microarray on the upper layer serves as a physical barrier, sweat is restrained in a specific hydrophilic channel, and disordered spreading and volatilization of the sweat in the collecting cavity are effectively prevented. According to the collaborative design of the hydrophilic substrate and the hydrophobic array, strong capillary force is created, and rapid and efficient capture and enrichment of trace sweat are achieved. The sweat collecting capacity of the substrate is obviously superior to that of a traditional substrate lacking the micro-nano structure design.

The application discloses a kind of carbon dioxide laser as heat source's optical fiber bonding equipment and method, equipment includes operating platform, carbon dioxide laser, optical path mechanism, five-dimensional translation stage and micro magnification system;The top of operating platform is installed with the vacuum chamber that can be opened and closed, vacuum chamber is communicated with vacuumizing equipment, and observation window and laser window are installed on vacuum chamber;Carbon dioxide laser is installed at the bottom of operating platform;Optical path mechanism includes the steering mirror group that is installed in operating platform top surface in sequence, four corner light cone and annular parabolic mirror;Four corner light cone is installed with dispersed mirror piece group around;Five-dimensional translation stage is installed on operating platform;First clamp and second clamp are installed on five-dimensional translation stage;Micro magnification system is installed on operating platform, and it is towards five-dimensional translation stage, and micro magnification system is arranged opposite observation window.This application can realize the bonding connection of optical fiber and end cap or other optical devices under low temperature condition, effectively improve the success rate of bonding.