242 results about "Laser intensity" patented technology

The invention relates to the field of gravity measurement, and aims to provide a small-size high-precision gravimeter based on an anti-magnetic suspension principle. The gravimeter comprises a low-frequency magnetic potential well unit, a suspension mechanical oscillator unit, a displacement detection unit and a cavity enclosing unit, and lens groups of the low-frequency magnetic potential well unit, the suspension mechanical oscillator unit and the displacement detection unit are all located in a cavity of a heat preservation shell on the innermost side. According to the invention, a measurement environment without external influence can be provided for the displacement detection of the suspension oscillator, the adjustment of the frequency in the vertical direction in a magnetic suspension potential well is resisted, the movement of an object to be measured is reflected by the voltage fluctuation brought by the laser intensity change measured by the photoelectric converter, and the high-precision gravity measurement is realized; the vibrator adopts a magnetic suspension mode and does not make mechanical contact with the environment, and long-term irreversible deformation can be avoided; and a temperature control and magnetic shielding device or other auxiliary equipment with a large volume is not needed, so that the gravimeter is small in overall size, convenient to move, low in cost and beneficial to popularization.

The invention discloses a LiDAR-IMU-camera tight coupling positioning and mapping method and device for a mobile platform, and belongs to the technical field of robot SLAM. Synchronously triggering the color camera, the laser radar and the IMU through hardware, and unifying timestamps; performing compensation and distortion removal on the laser point cloud motion by the IMU data; based on curvature, intensity and density self-adaptive downsampling, local plane fitting errors are used for distributing observation weights; the IMU pre-integration pose is used as an initial value, point-to-surface registration of the weighted point cloud and the local map is carried out, and a laser-IMU tight coupling odometer factor is obtained; the color image and the laser intensity graph are fused into a multi-mode loopback descriptor, and loopback factors are generated through global retrieval and geometric verification; and inputting an odometer, an IMU, a laser loopback factor and a visual loopback factor into an increment factor graph optimizer, jointly solving a global optimal key frame pose, and outputting a dense laser point cloud map and a color visual point cloud map. The method can be operated in real time on an embedded platform, effectively inhibits drifting, and realizes centimeter-level global consistent positioning and mapping.

The invention discloses an all-optical three-dimensional scanning confocal fluorescent microscopic imaging device and an implementation method thereof. According to the invention, through a deep learning driven adaptive regulation and control method, CNN is adopted to process spatial distribution data and dynamically regulate and control a phase hologram and the light intensity and phase compensation of a laser, so that the focal point of exciting light is subjected to aberration-free axial displacement, a bidirectional parallel optical scanning track of a two-dimensional scanning system is optimized, and all-optical three-dimensional scanning is realized; lSTM and TCN are combined to obtain a time sequence dependency relationship, a laser light source, an adjustable diaphragm, an electric focus-adjustable lens and a photoelectric detector are integrally controlled, efficient synchronization and automatic operation and high-speed axial focusing adjustment are realized, errors and time sequence mismatch are eliminated, optical characteristics of different samples and environmental interference are automatically adapted, and high-quality imaging is kept. The robustness and the applicable scene range of the system are improved; the method is used for model biological embryo real-time tracking, intracellular signal molecule dynamic visualization, cell membrane protein migration and aggregation observation and intracellular organelle interaction tracking.

The invention relates to the technical field of temperature monitoring, in particular to a welding joint temperature monitoring method in a thermoplastic composite material welding scene, which comprises the following steps: acquiring temperature data of different positions of a thermoplastic composite material in the welding scene at each acquisition moment to form a temperature image point matrix at each acquisition moment; acquiring fluctuation data of the temperature image point matrix at each temperature fluctuation moment; dividing each fluctuation data cluster of fluctuation data in the temperature image point matrix at each temperature fluctuation moment; calculating a fluctuation distribution factor at each temperature fluctuation moment; obtaining a temperature abrupt change factor of each fluctuation data cluster of the temperature image point matrix at each temperature fluctuation moment; acquiring a fluctuation abrupt change factor at each temperature fluctuation moment; acquiring the laser intensity nonuniform weight at each temperature fluctuation moment; and monitoring the temperature of the welding joint in the thermoplastic composite material welding scene based on the uneven weight of the laser intensity. The accuracy of welding joint temperature monitoring is improved.

The invention relates to the technical field of lane edge detection, and provides a multi-source feature lane edge line identification method and system based on a scoring mechanism, and the method comprises the following steps: obtaining and preprocessing road point cloud data, and obtaining road region point cloud data; the color information and the laser intensity information are fused for scoring, and the road area point cloud is processed to obtain a lane line point cloud; for the lane line point cloud, extracting boundary points based on the central main axis and the normal feature jump score to obtain an edge line of each lane line; and performing smooth fitting on the edge line of the lane line to obtain a fitted lane edge line. According to the method, the color and laser intensity double-scoring function is constructed, the intensity threshold is adaptively determined through the OTSU algorithm, and the intensity threshold and RGB color difference are subjected to weighted fusion, so that the recognition accuracy and continuity of the lane marking points are effectively improved, and the problems of extraction fracture, misrecognition and the like in a traditional method are solved.

The invention relates to a multi-pass cell cavity structure capable of realizing single-concentration standard gas rapid double-point calibration, which is characterized by comprising a laser device, a cavity mirror I with an entrance port, a cavity mirror II with an entrance port, a reflecting mirror and a detector, and the laser device, the reflecting mirror and the detector are positioned on the outer side of the cavity mirror I; the first cavity mirror and the second cavity mirror are oppositely arranged, a double-face cavity mirror is arranged between the first cavity mirror and the second cavity mirror, emitted light of the laser enters the light cavity between the first cavity mirror and the second cavity mirror from the incidence port according to the incidence angle designed by the multi-pass cell, goes back and forth in the light cavity for multiple times and then is emitted out from the incidence port, and emitted emergent light enters the detector through the reflecting mirror. The detector is used for measuring laser intensity changes. The multi-pass cell cavity is ingenious in structure, double-point calibration based on single-concentration standard gas can be achieved through the additionally-arranged double-face cavity mirror, the calibration frequency can be reduced, the calibration rate can be increased, then the standard gas for calibration can be saved subsequently, the use cost can be reduced, and the use experience can be enhanced.

The invention relates to the technical field of ultrasonic sensors, and discloses an optical fiber end face integrated micro-cavity sonic sensor which comprises a seven-core optical fiber, two light propagation waveguides, a coupling waveguide, a supporting assembly, a micro disc, a light emitter and a photoelectric detector, the two light propagation waveguides are arranged on the end face of the seven-core optical fiber, the coupling waveguide is arranged between the two light propagation waveguides, and the supporting assembly is arranged on the end face of the seven-core optical fiber. A supporting assembly is arranged on the end face of the seven-core optical fiber, a micro disc is arranged on the top of the supporting assembly, and the first fiber core and the second fiber core are connected with an external light emitter and an external photoelectric detector respectively. The wavelength of the laser output by the light emitter is locked at the linear slope of the micro-disk harmonic peak, the radius and the effective refractive index of the micro-disk are changed through the action of ultrasonic waves on the micro-disk and vibration, the harmonic peak drifts and the intensity of the output laser is changed, and then the ultrasonic waves are detected; compared with the prior art, ultrasonic waves are detected through a micro-disk resonance and laser sideband locking method, and the problem of electromagnetic interference can be effectively avoided by utilizing the optical principle.

The invention discloses an underwater navigation positioning method and system based on supercontinuum laser intensity correlation. The system comprises a master control system, a transmitting end underwater base station and a receiving end underwater carrier. The method comprises the following steps: firstly, a main control system generates a super-continuum laser signal with pseudo-random code information, the super-continuum laser signal is separated into optical signals of different wavelength channels through a light splitting module, and the optical signals are respectively sent to underwater base stations uniquely corresponding to the wavelength channels and are emitted; then the underwater carrier receives optical signals from a plurality of base stations, identifies a signal source base station according to wavelength identification, performs correlation operation with a locally copied pseudo-random code sequence, determines signal arrival time TOA and calculates a pseudo-range; and finally, resolving the three-dimensional coordinate and local clock error result of the underwater carrier by combining the pseudo-ranges, absolute positions and transmission delays of the underwater carrier and the at least four base stations. According to the invention, high-precision and high-robustness absolute positioning of the underwater environment is realized, and the reliability of long-time positioning and navigation of the underwater robot is enhanced.

The invention relates to a laser crystal non-radiative decay life measurement method based on relaxation oscillation frequency analysis of a solid laser, which comprises the following core steps of: firstly, acquiring a laser intensity noise spectrum in real time by adopting a self-zero beat noise detection device (2) in a stable operation state of the solid laser (1); obtaining a relaxation oscillation frequency measured value of the laser through spectral line feature analysis; secondly, a relaxation oscillation frequency theoretical model is built based on a laser rate equation, and a theoretical function curve graph with the non-radiative decay life of the laser crystal as an independent variable and the relaxation oscillation frequency as a dependent variable is built in combination with actual operation parameters (including pumping power, cavity structure parameters and crystal characteristics) of the laser; and finally, matching the actually measured relaxation oscillation frequency with the frequency value in the theoretical curve, and determining the non-radiative decay life value of the laser crystal through abscissa inversion. The method breaks through the limitation of a traditional measurement method, can realize non-intrusive high-precision measurement in a continuous working state of the laser, and is particularly suitable for in-situ characterization and life evaluation of non-radiation attenuation dynamics of the laser crystal in a solid laser system.

The invention discloses a tunnel brightness measurement method based on point cloud intensity, which belongs to the technical field of tunnel illumination, and comprises the following steps: establishing an object reflection model, determining received laser power Pr based on a Lambert model, and correcting the distance d between the object surface and a laser reflector based on the Lambert model, and then introducing a BRDF model to correct the included angle theta between the incident light and the surface of the object so as to eliminate the influence of the two factors of the incident angle and the distance on the laser intensity value to obtain the object reflectivity rho1 and fr under the condition of the point cloud intensity I, and finally calculating the road surface brightness after reflection of the side wall of the tunnel. According to the invention, brightness measurement is carried out from the perspective of a three-dimensional laser scanning technology, a new brightness measurement method is provided, a tunnel brightness detection model considering multi-dimensional space parameters is established, the change of tunnel light environment characteristics is comprehensively analyzed, and a multi-dimensional space brightness detection model is provided in an active light detection form.

Disclosed in the present invention are an optical apparatus for measuring a nanoparticle concentration and a measurement method thereof. The optical apparatus comprises a sample cell, a rotary wheel installed with a neutral-density filter, an APD detector, a PD detector, a laser device, a lens, a data acquisition card and a control unit, wherein a laser emitted by the laser device passes through the lens to illuminate a sample in the sample cell; in a transmission direction, the intensity of the transmitted laser is measured by means of the PD detector; and a scattered signal from the sample is accepted at a 90° or in a backward direction by the APD detector connected to an optical fiber. The measurement method comprises: measuring a volume fraction Φ of a sample by means of a transmitted laser intensity signal and a light extinction method; measuring a particle size distribution of the sample by means of a scattered laser signal and a dynamic light scattering method; and calculating a volume fraction Φi and a number concentration of each particle size peak by means of the volume fraction Φ and the particle size distribution. The present invention combines a light extinction method and a dynamic light scattering method to implement the measurement of both a volume concentration and a number concentration of a sample.

The invention relates to a laser processing system (1) having at least one laser source (3, 4) for generating a plurality of mutually independent laser intensity distributions (5, 6). The laser processing system (1) comprises a control device (7) for controlling the laser power levels (P1, P2, 13, 14) and / or the beam quality levels (K1, K2, 14, 16) of the laser intensity distributions (5, 6) independently of one another. The laser processing system (1) is designed to vary the laser power levels (P1, P2, 13, 15) and / or the beam quality levels (K1, K2, 14, 16) of the laser intensity distributions (5, 6) differently from one another within each laser pulse by means of the control device (7). The invention also relates to a corresponding method for processing material (2) by means of corresponding laser radiation (5, 6).

The invention provides a laser shock strengthening rapid coating method, and belongs to the technical field of laser strengthening. The laser shock peening rapid coating method comprises the following steps that the surface of a substrate material is pretreated, and the substrate material to be coated is obtained; coating the surface of the substrate material to be coated with a coating material to form a coating layer; an absorption layer and a restraint layer are arranged on the surface of the coating layer, and a substrate material to be reinforced is obtained; and the substrate material to be strengthened is subjected to laser shock treatment, then cooling and cleaning are conducted, and the substrate material with the strengthened surface is obtained. According to the rapid coating method for laser shock peening, the materials and the thicknesses of the absorption layer and the restraint layer are specially limited, so that laser can act on the coating to the maximum extent, the coating material can form a compactly-attached coating on the surface of the substrate material more quickly, and the bonding strength between the coating and the substrate material is remarkably improved.

The application relates to a detection method and system for measuring residual oxygen concentration by laser, and relates to the field of gas concentration detection. The method comprises the following steps: selecting laser with oxygen absorption peak wavelength as detection laser, applying a periodically changed modulation signal to form a modulation laser and irradiate the headspace, demodulating a direct current component from the modulation laser passing through the headspace, calculating a deviation rate according to the direct current component and a reference direct current, judging whether the deviation rate is within a threshold value, feeding back and adjusting the laser wavelength if the deviation rate is not within the threshold value, and finally outputting a laser intensity attenuation curve of residual oxygen to obtain the residual oxygen concentration. The detection system comprises an optical subsystem, an electrical subsystem, a feedback control subsystem and a data processing subsystem. The application can accurately measure the residual oxygen concentration in the headspace, effectively detect and correct the laser wavelength drift, and improve the measurement precision and stability.

The utility model belongs to the technical field of optical instruments, and particularly relates to an optical tweezer optical path module and a cell optimization system. The optical tweezer optical path module comprises a supporting base, a laser head mounting seat and a multi-stage attenuation module. The laser head mounting seat is arranged on the supporting base and is used for mounting a laser emitting head for emitting laser; and the multi-stage attenuation module is arranged on the supporting base and comprises a plurality of reflection attenuation mirror groups which are arranged on the light path at intervals, and each reflection attenuation mirror group is used for attenuating the laser intensity and changing the laser direction. The optical tweezer optical path module provided by the utility model has a multi-attenuation mechanism, and a relatively large attenuation multiple range is easier to realize, so that laser power adjustment in a relatively large range is realized, the laser power dynamic adjustment capability is favorably improved, the laser intensity is finely controlled, and cells are not damaged when various cells are fixed through an optical trap formed by laser.

In an example, the present invention provides a system including a light source configured to generate a laser. The system has an optical enhancement cavity coupled to the light source and configured to increase an intensity of the laser and a cavity dumper coupled to the optical enhancement cavity. The system has an acoustic wave coupled to the cavity dumper to diffract the laser.

The invention discloses a method for calculating and eliminating laser intensity modulation and carrier phase delay in a modulation absorption frequency stabilization system, and belongs to the technical field of semiconductor laser frequency stabilization and precision detection. In order to improve the stability and accuracy of the output center frequency of the laser, a modulation absorption frequency stabilization system is built; executing a coarse adjustment stage of laser intensity modulation and carrier phase delay parameters, and obtaining a phase difference between light frequency modulation and light intensity modulation; a fine stepping optimization stage is executed, laser intensity modulation and carrier phase delay parameter calculation are completed, and the updated phase corresponding to the maximum peak-to-peak value of the light intensity absorption 1f signal and the phase corresponding to the maximum value of the extreme value difference of the light intensity absorption 2f signal are obtained; performing elimination processing to obtain a light intensity absorption 1f signal after elimination processing; and for the modulation absorption frequency stabilization system, residual light intensity fluctuation caused by current modulation on the tunable semiconductor DFB laser is eliminated by using a light intensity stabilization device. The stability and the accuracy of the output center frequency of the laser are improved.

The present application relates to the technical field of sensor data calibration, and specifically relates to a multi-sensor data calibration processing method, system and medium, the method comprising: obtaining at least two sensor data and standard second harmonic signal data; obtaining the second harmonic signal data corresponding to the laser intensity signal from the sensor data; determining the harmonic abnormal feature, the first difference rate and the second difference rate according to the second harmonic signal data and the standard second harmonic signal data; determining the calibration error parameter according to the harmonic abnormal feature, the first difference rate and the second difference rate; based on the calibration error parameter, the initial detected target gas concentration is calibrated to obtain the calibrated target gas concentration. The present application can correct the initial detected target gas concentration according to the calibration error parameter, improve the calibration accuracy, and further reduce the deviation between the sensor detected gas concentration and the real gas concentration.

The present invention relates to the technical field related to linear guide rails, and specifically to a linear guide rail straightness monitoring device and system. The linear guide rail straightness monitoring device comprises a laser emitting module, a light guiding hole and a laser receiving module. The laser emitting module is fixedly mounted on a emitting module mounting seat, the light guiding hole is arranged on a guide rail slide, the laser receiving module is fixedly mounted on a receiving module mounting seat, the emitting module mounting seat and the receiving module mounting seat are both fixedly mounted on the linear guide rail, and the linear guide rail is fixedly mounted on a machine tool body through a connecting seat; the laser emitted by the laser emitting module passes through the light guiding hole, and is received by the laser receiving module. When the guide rail slide and the linear guide rail are offset in position, the amount of laser light passing through the light guiding hole will change, which will cause the laser intensity received by the laser receiving module to change, thereby realizing real-time monitoring of the relative positions of the guide rail slide and the linear guide rail, thereby achieving the purpose of monitoring the straightness of the guide rail.

The invention discloses a method for simulating non-uniform light spots, which comprises the following steps of: determining the number of required laser sources according to the light intensity distribution in the shape of the simulated non-uniform light spots, arranging a plurality of laser sources at the same laser transmitting end, and controlling the central position of the light spots by adjusting the orientation and the pitching angle of each laser source, so as to simulate the non-uniform light spots. The divergence angle, the energy and the intensity distribution of the light spots of each laser source are adjusted, so that different light spots irradiated on the target plate by different laser sources are staggered and superposed to form different light intensity areas; calculating an atmospheric attenuation coefficient of the atmospheric transmittance according to the atmospheric environment parameters, and adjusting the laser intensity of a laser source of the laser transmitting end according to the atmospheric attenuation coefficient; and constructing an atmospheric turbulence simulation model, outputting fluctuation data of the atmospheric turbulence on the laser intensity, propagation direction, phase and frequency of the laser source according to the input atmospheric environment parameters, obtaining adjustment parameters of the laser source corresponding to the fluctuation data by adopting a Fourier transform spectrum inversion method, and adjusting the laser source.

A method for characterizing a resonator element (102) is provided, the method comprising the steps of providing laser light having a tunable carrier frequency and coupling at least a first portion of the laser light into a resonator element (102) having a plurality of carrier resonances (3000) for the carrier frequency of the laser light, wherein adjacent carrier resonances (3000) are spaced apart from one another within a spectral range by a free spectral range (FSR). The method further includes modulating the intensity and / or phase of the portion of the laser light coupled into the resonator element (102) with a first modulation frequency (1001) and a second modulation frequency (1002) to generate, for each carrier resonance (3000), at least two sideband resonances (3001) spaced from the carrier resonance (3000) by the first modulation frequency (1001) and at least two sideband resonances (3002) spaced from the carrier resonance (3000) by the second modulation frequency (1002), wherein the first modulation frequency (1001) and the second modulation frequency (1002) are integer multiples of the free spectral range and are different from each other. The method further includes tuning the carrier frequency of the laser light at a predetermined tuning speed and measuring the intensity of the laser light transmitted and / or reflected by the resonator element (102) while tuning the carrier frequency. Furthermore, the method includes measuring a tuning time elapsed in tuning the carrier frequency across four adjacent sideband resonances (3001, 3002), the tuning time corresponding to the time required to change the tunable carrier frequency from a value corresponding to the first of the four sideband resonances to the last.The method further includes determining the spacing between multiple carrier resonances (3000) within the spectral range using the measured intensity of the laser light transmitted and / or reflected by the resonator element (102), the first modulation frequency (1001), the second modulation frequency (1002), and the tuning time measured when tuning the carrier frequency across four adjacent sideband resonances (3001, 3002).

The utility model discloses a cutting and developing device for steel pipe processing, include: the base plate, the outer wall fixedly connected with the guiding device and the flattening device of base plate top, the inner wall sliding connection has cutting device of guiding device, the utility model relates to steel pipe cutting and developing technical field, this guiding device and flattening device, through fixed plate, threaded rod and the resistance board form "screw thread adjustment and clamping fixed " structure, and the operator can accurately control the resistance board spacing through rotating threaded rod, firmly fixed in the mounting hole with flame cutting nozzle, ensure that the flame nozzle always aligns the bus direction of steel pipe, simultaneously, the MSE-V-ONE laser doppler velocimetry sensor real -time monitoring steel pipe moving speed and position, not only can judge whether the steel pipe reaches the cutting area through the reflected laser intensity, but also can feed back the speed signal to the PLC controller, and dynamically match the gas supply amount of flame cutting nozzle and the conveying speed of steel pipe.

The invention relates to the technical field of power grid operation, and provides a power grid operation safety distance accurate sensing device and method in a non-fixed scene, and the device comprises a hardware device and terminal software which is in communication connection with the hardware device. The hardware device is integrated and deployed on a movable support or a holder, and comprises a laser radar sensor which is used for rapidly scanning a power grid operation scene and obtaining three-dimensional point cloud data including three-dimensional coordinates, laser intensity and echo information; the high-definition visible light camera is approximately parallel to the optical axis of the laser radar sensor and is used for collecting real-time video images of the operation scene; an AI visual analysis module and a point cloud processing unit are arranged in the embedded processor; and the terminal software is deployed on the edge computing equipment or the background server and is used for receiving and processing the data from the hardware device. According to the invention, the safe distance can be accurately sensed.

The invention discloses an underground oil casing laser perforation device, which belongs to the technical field of petroleum drilling and comprises the following steps: acquiring perforation parameter state data, perforation environment state data, light beam quality influence data and current perforation state data; generating a perforation parameter state index and a perforation state environment index according to the perforation parameter state data and the perforation environment state data, and obtaining a perforation basic coefficient according to the perforation parameter state index and the perforation state environment index; generating a light beam quality influence factor according to the light beam quality influence data, and acquiring a perforation collaboration coefficient of the current perforation depth and the light beam linear velocity in the current perforation state data under the condition of the current light beam quality influence factor; constructing a laser intensity adjustment model to generate a laser intensity adjustment value according to the collaboration of the current perforation depth and the light beam linear velocity, the perforation basic coefficient and the current laser intensity; according to the invention, deep penetration perforation of the oil casing can be realized by dynamically regulating and controlling laser parameters.

The invention discloses a gas absolute concentration calibration-free measuring device and method based on a photoinduced thermoelastic spectrum. The device comprises a signal generator, a laser, a laser collimation system, a laser intensity modulator controller, a laser intensity modulator, a gas chamber, a lens, a quartz tuning fork, a lock-in amplifier and a computer. The invention provides a gas absolute concentration calibration-free measurement method based on a photoinduced thermoelastic spectrum by utilizing an intensity modulation technology on the basis of the photoinduced thermoelastic characteristic of a quartz tuning fork, and the method avoids the unavoidable calibration technical process in the photoinduced thermoelastic spectrum technology all the time. And a new technical scheme is provided for solving the problems of weak anti-interference capability and poor long-term stability of a sensor system caused by the method. The detection device disclosed by the invention has the advantages of high sensitivity, strong disturbance immunity, low cost and the like.

A method for manufacturing a vehicle crash pad includes heating a skin layer using a heater, attaching a cushion layer to the skin layer, placing a lower mold and an upper mold relative to a fabric including the skin layer and the cushion layer, forming a molded member on the lower mold, vacuum molding. The upper mold is lowered to perform the vacuum molding. The method further includes a laser processing of the fabric and molded member using a processing system, where a sensor senses the fabric and molded member, and based on sensed data, a through-hole is defined by adjusting the intensity of a laser's light irradiated to the fabric and molded member.

A device includes a grouping of N qubits, where N is equal to two or more, and a coherent light source configured to, given selected values for a set of parameters of at least a first and a second laser pulse, the parameters selected from a relative phase shift, a laser frequency, a laser intensity, and a pulse duration: apply at least the first and second laser pulses to all qubits within the grouping of N qubits, thereby coupling a non-interacting quantum state |1 to an interacting excited state |r, such that each qubit that begins in quantum state |1 returns to the state |1 upon completion of the at least first and second laser pulses, and such that qubits in the grouping are mutually blockaded.

The present invention relates to the field of laser cutting control technology, and in particular to a laser processing method, device, equipment and system for metal workpieces. The method calculates the benchmark cutting speed and laser power range of the metal workpiece to be processed from the historical cutting data of the processed workpiece that has been processed. The low processing quality of the current workpiece can be effectively quantified based on the distribution volatility and degree of change of the scattered laser intensity. The probability of metal overheating is further obtained based on the surface temperature of the workpiece. Furthermore, the direction of laser power adjustment in the current state can be determined based on the probability of metal overheating, and the power adjustment amount obtained in combination with the low processing quality can realize adaptive adjustment of the power of the laser cutting process. The present invention ensures the cutting quality of the metal workpiece by monitoring the quality status of the metal workpiece in the laser cutting process in real time and adaptively adjusting the laser cutting parameters according to the quality status.

The invention belongs to the technical field of optical fiber device preparation and sensing, and discloses a honeycomb disc spring type sensing structure and a processing and using method. The polymer spring structure integrally manufactured on the end face of the optical fiber based on the two-photon polymerization 3D printing technology provides a sensing basis for high-precision micro stress detection. The polymer probe with the width smaller than 10 microns realizes the stress detection function of a micro-nano region, and the photocuring processing precision of the structure can be realized by adjusting a series of parameters, such as laser intensity, scanning speed and cutting layering gaps. Experimental results show that the sensing structure can realize high-sensitivity microstress or strain sensing demodulation in a range of 100 mu epsilon to 300 mu epsilon, keeps the structure stable and realizes repeated detection. According to the method, sensing structures suitable for various micro stress and strain ranges can be manufactured by adjusting structural parameters according to user requirements.

The application relates to a laser speckle image denoising method and device, which combines the complementary advantages of a laser intensity image and a laser phase image, extracts and fuses a contour feature map of a laser speckle image and a curvature feature map and a normal vector feature map of a laser phase image, provides a neural network with abundant geometric context, and further adds geometric feature constraints in the neural network to form a hierarchical system. The synergistic effect of the geometric constraints enables the denoising model to accurately maintain the edge contour, local surface morphology, surface orientation and overall topological structure of the image when removing speckle noise, significantly improves the geometric structure integrity of the denoised image, and effectively solves the problem that denoising and structure preservation are difficult to balance and diagnostic information is lost in the background technology. The application provides a more reliable and accurate solution for medical imaging application scenarios, and has significant technical progress and application value.