663 results about "Ir laser" patented technology

A method of making a vacuum insulating panel, the vacuum insulating panel comprising a first glass substrate, a second glass substrate, a plurality of spacers provided in a gap between at least the first and second glass substrates, and a seal provided between at least the first and second glass substrates, the seal comprising a first seal layer and / or a second seal layer. The method may include laser heating, using a laser beam from a continuous wave near-IR laser, seal material in order to form the first seal layer; wherein the laser heating may include causing the laser beam to move at a lateral speed of from about 5-70 mm / second relative to the substrates and the first seal material so that the laser beam at least partially passes through at least one of the glass substrates and impinges upon at least the second seal layer in order to heat the second seal layer and fire and / or sinter the first seal material thereby forming the first seal layer.

The invention discloses a solar cell defect detection method based on a multi-mode sensing technology. The system comprises the following steps: 1, multi-modal data acquisition: acquiring multi-modal data in real time by using four sensing technologies of near-infrared laser, area array visible light, PL and EL; 2, multi-modal data processing: carrying out denoising, edge detection and feature extraction on the acquired near-infrared, visible light, PL and EL images by adopting a mixed image processing algorithm to obtain key defect features; 3, multi-modal data fusion: combining a multi-modal data fusion method with a decision-making level strategy, synthesizing different technical data, improving the detection precision, and classifying, positioning and labeling the defects of cracks, broken gates, scratches, depressions, poor welding and hot spots by using a convolutional neural network to ensure accurate distinguishing of surface and internal defects; and 4, defect marking and production line adjustment: marking defects and adjusting the production line through a feedback and automatic control module, and feeding back a real-time visual result to a management layer.

A method of making a vacuum insulating panel, the vacuum insulating panel including a first glass substrate, a second glass substrate, a plurality of spacers provided in a gap between at least the first and second glass substrates, and a seal provided between at least the first and second glass substrates, the seal comprising a first seal layer. The method may include: providing first seal material for the first seal layer in a location at least partially between at least the first and second glass substrates; laser heating, using a laser beam from a continuous wave near-IR laser, the first seal material in order to form the first seal layer; wherein said laser heating may comprise using the laser beam, having a size of from about 2-15 mm, so that the laser beam at least partially passes through at least one of the glass substrates to fire and / or sinter the first seal material thereby forming the first seal layer, in a manner so that the first seal layer a density of from about 2.8-4.0 g / cm3; and after forming the first seal layer, evacuating the gap to a pressure less than atmospheric pressure.

The invention relates to the field of diameter measurement, in particular to a steel wire rope infrared laser diameter detection device and method, and the device comprises an installation seat which is connected with a measurement assembly used for measuring the diameter of a steel wire rope. According to the invention, through cooperation between the two mounting ring plates and the limiting rollers correspondingly limited on the two mounting ring plates, a steel wire rope to be measured is supported and limited, and then through cooperation between the laser emitting end and the laser receiving end correspondingly connected in the two mounting ring plates, the steel wire rope to be measured is measured. The steel wire rope diameter measuring device achieves the effect of measuring the diameter of a steel wire rope in a non-contact mode, effectively reduces friction and vibration during relative sliding of the steel wire rope and the shell through cooperation of a limiting roller and a buffer spring, and improves the measuring precision.

The invention discloses an airborne laser radar sounding data processing method and system, and relates to the technical field of marine surveying and mapping and earth observation, and the method comprises the following steps: collecting original full-waveform data of an airborne laser radar sounding system, the original full-waveform data comprising infrared laser channel data and blue-green laser multichannel data; joint denoising processing is carried out on the original full-waveform data to obtain denoised waveform data, and the joint denoising processing comprises background noise modeling and removing based on machine learning and random noise filtering based on frequency domain low-pass filtering; a collaborative joint denoising strategy is formed by fusing background noise modeling based on machine learning and frequency domain low-pass filtering based on signal-to-noise ratio optimization. According to the method, complex background noise can be accurately estimated and removed, random noise can be adaptively filtered out, weak underwater echo signals are reserved to the maximum extent, and the problem of water depth information loss caused by excessive smoothness is effectively avoided.

An additive manufacturing method based on micro-selective laser melting technology. By using a spot size of 30 μm or less, a metal powder layer thickness of 10 μm or less and ultrafine metal powders having a D90 particle size of 30 μm or less, and in combination with the control of a scanning laser power, a scanning rate, a linear energy density and a volumetric energy density within specific ranges, the method can print complex-structured metal parts having extremely high resolutions and surface smoothness, and can obtain a high-density internal structure of a component even under a relatively low energy density or power condition, thereby effectively protecting an optical system. Moreover, a printed component exhibits a defect-free microstructure, and has excellent electrical properties, thermal properties and mechanical properties. Particularly, ultrafine grains and a high dislocation density provide superior mechanical properties compared to conventional manufacturing materials. An infrared laser device can be used, thereby achieving low costs.

The invention discloses a flow-type Raman sorting method and a high-luminous-flux flow-type Raman sorting device, and the method comprises the following steps: carrying out coincident focusing on Raman laser and near-infrared laser captured by a light trap to form a Raman excitation detection site, and arranging the Raman excitation detection site at the tip of the outer end of a tail end electrode in a chip dielectric focusing electrode; the photo-thermal oscillation near-infrared laser is focused on a tail end electrode in a dielectric focusing electrode of the chip and does not coincide with a Raman excitation detection site; through switching of light trap capture near-infrared laser and photo-thermal oscillation near-infrared laser, a single cell sample is captured and fixed at a Raman excitation detection site through light trap capture force generated by the light trap capture near-infrared laser or bubbles are generated through a photo-thermal effect generated by the photo-thermal oscillation near-infrared laser; the cell sample adhered to the tail end electrode in the dielectric focusing electrode is oscillated and separated through the bubbles. Compared with the prior art, the device has the beneficial effects that the organic combination of optical trap capture and dielectric capture sample oscillation functions can be realized, the switching is convenient, flexible, rapid, simple and reliable in use, the instrument cost is greatly reduced, the application range of the instrument is effectively widened, and the device has very strong universality.

The invention relates to a microscope system, in particular to a confocal microscope system of a short-wave infrared band. The system comprises a bright / dark field microscopy subsystem, a photon emission microscopy subsystem, a short wave infrared laser scanning confocal microscopy subsystem, a fluorescence confocal microscopy subsystem and a control module. According to the system provided by the invention, the short-wave infrared fluorescence lifetime curve can be obtained through the electro-luminescence emission and / or photoluminescence emission of the semiconductor device in the integrated circuit, so that the defect type of the semiconductor can be judged. Besides, the system adopts a multi-subsystem optical path multiplexing structure in structural design, short-wave infrared fluorescence generated by exciting a defect or a failure point is collected while observation is facilitated, high integration level is achieved, and observation, positioning and failure analysis of the defect or the failure point can be achieved only by using a single system provided by the invention.

The invention discloses a copper-chromium alloy contact part and a preparation method thereof, and belongs to the technical field of contact material processing. The preparation method comprises the steps that a substrate is installed, a cursor is printed on the substrate, and the cursor is consistent with the bottom face of a copper-chromium alloy contact target part in specification; bonding the connecting surface of the base body on the substrate to obtain a connected material; the connecting surface is matched with the cursor on the substrate; the connected material is fixed in a printing bin, infrared laser printing is conducted on the printing face of the base body according to preset laser additive manufacturing parameters, and a copper-chromium alloy contact part printing piece is obtained; and the copper-chromium alloy contact part printing piece is taken out to be subjected to solid solution heat treatment and separation, then groove position and inner hole machining is carried out, and a copper-chromium alloy contact target part is obtained. By means of the method, the high-strength and high-compactness copper-chromium alloy contact can be obtained.

The invention belongs to the technical field of electronic packaging defect detection, and particularly discloses a semiconductor packaging welding spot defect detection system and a detection method thereof.The system comprises an infrared excitation module and an ultrasonic signal processing module; a to-be-detected packaging sample wafer is arranged on a laser emergent light path of the infrared excitation module during detection, and is positioned in a detection focus area of the ultrasonic signal processing module; the infrared excitation module scans a to-be-tested packaging sample wafer by using the output infrared laser so as to thermally excite the internal structure of the to-be-tested packaging sample wafer and primarily generate an ultrasonic signal; when the infrared excitation module scans, the ultrasonic signal processing module synchronously detects a first ultrasonic signal generated by each scanning position point on the to-be-detected packaging sample wafer, and determines a welding spot defect detection result of the to-be-detected packaging sample wafer based on the first ultrasonic signal of each scanning position point. According to the invention, the precision and sensitivity of semiconductor packaging welding spot defect detection can be effectively improved.

The invention relates to an image processing method based on AI, and the method comprises the following steps: collecting RGB, infrared and laser radar multi-mode images, integrating environment sensor data, enabling 2D images, 3D point clouds, video streams and environment parameters to be compatible, improving the definition of low-quality images in real time based on a low-illumination adaptive network, and improving the image quality in real time. Simulating different noise and shielding conditions by using a GAN generative adversarial network, and aligning timestamps of multi-source data and a space coordinate system based on self-supervised learning; and in combination with a super Ethernet transmission technology, low-delay multi-node data synchronization is realized, and collaboration of edge end real-time processing and cloud deep analysis is supported. Compared with a traditional method, the real-time processing speed is increased by 5 times, the industrial defect detection false alarm rate is reduced by 30%, cloud dependence is reduced through edge calculation, the hardware cost is reduced by 40%, the limitation of a single scene is broken through through a dynamic architecture, cross-modal fusion and industry customization design, and the industrial defect detection method has good application prospects. And an innovative path with universality and vertical depth is provided for AI image processing.

The embodiment of the present application provides an aluminum-copper dissimilar metal composite laser welding method and an aluminum-copper welding joint, which relates to the field of laser welding technology. The aluminum-copper dissimilar metal composite laser welding method of the embodiment of the present application includes the following steps: S1, stacking and relatively fixing aluminum metal plates and copper metal plates to obtain parts to be welded; S2, combining blue laser, point infrared laser and ring infrared laser, and focusing them to the welding position on the surface of the parts to be welded to form a composite laser beam; S3, welding the parts to be welded in an oscillating manner by keeping the composite laser beam. The aluminum-copper dissimilar metal composite laser welding method and the aluminum-copper welding joint of the embodiment of the present application can reduce the porosity in the weld and improve the mechanical properties and ductility of the weld.

The invention provides a system and a method for automatically optimizing the power of a frequency doubling laser, and relates to the technical field of laser. The high-temperature frequency doubling furnace comprises an LBO crystal and a heating sheet, the LBO crystal is used for carrying out high-temperature frequency doubling on laser emitted by the infrared laser, and the heating sheet is used for heating the LBO crystal; the dichroic mirror is used for transmitting the frequency-doubled laser and reflecting and filtering the non-frequency-doubled laser; the spectroscope is used for dividing the frequency-doubled laser into reflected light and transmitted light; the power meter is used for measuring the power of the reflected light; and the temperature controller is used for controlling the heating plate to heat the LBO crystal according to the reflected light power fed back by the power meter so as to adjust the temperature of the LBO crystal and enable the power of the reflected light to fluctuate within a preset range. According to the method, the frequency doubling power of the laser subjected to high-temperature frequency doubling through the LBO crystal can be kept stable and is not influenced by environment temperature fluctuation.

The invention discloses an equipment welding method and system in a space environment, equipment and a medium, relates to the technical field of space welding, and solves the problem of camera overexposure caused by strong light reflection by setting an exposure mode of an HDR camera into a short exposure mode to shoot an image on a sunny side. Meanwhile, welding arc light and metal surface reflection light are extracted by using a multispectral sensor, so that the metal reflection light and the welding arc light are distinguished; the exposure mode of the multi-angle camera set is set to be a long exposure mode on the shady face, infrared laser is matched to irradiate the welding position to shoot images, the image brightness is continuously enhanced, meanwhile, a thermal imaging sensor is used for recognizing the images, and therefore the problem that equipment generates low-temperature deformation during low illumination is solved; therefore, the welding seam position of the sunny side can be identified according to the position of the welding arc light, the welding seam position of the shady side can be identified through brightness compensation on the shady side, meanwhile, the welding problem of the sunny side and the shady side is solved, and the welding precision in the space environment is improved.

The invention discloses an ultra-long-distance infrared laser module supporting frame with a vibration-proof structure, and particularly relates to the field of laser modules, the ultra-long-distance infrared laser module supporting frame comprises a linear driving mechanism, the output end of the linear driving mechanism is provided with a vibration-proof adjusting mechanism, the vibration-proof adjusting mechanism comprises a first supporting frame, and the first supporting frame is provided with a rotatable second supporting frame; a rotatable mounting seat is arranged on the second supporting frame and used for mounting a generator module, and the angle of the output end of the generator module is adjusted through rotation of the mounting seat, so that the output end of the generator module vertically irradiates the water bottom all the time. By arranging the anti-vibration adjusting mechanism, the angle of the generator module is adjusted through swinging of the first supporting frame, the second supporting frame and the mounting base, the anti-vibration performance of the generator module can be improved, the output end of the generator module can perpendicularly irradiate the water bottom all the time, imaging integrity and coherence in the data acquisition process are ensured, and the data acquisition efficiency is improved. And the accuracy of imaging data is improved.

The invention discloses a preparation method of copper-based composite powder with high infrared laser absorptivity and a reaction device of the copper-based composite powder, and belongs to the technical field of metal additive manufacturing. The preparation method of the copper-based composite powder comprises the following steps that copper powder is subjected to acid pickling pretreatment, Cu2O-coated Cu powder is prepared through air suspension dynamic etching, the Cu2O-coated Cu powder is purified, and the prepared composite powder is of a core-shell structure and comprises a copper core and a cuprous oxide modified shell wrapping the surface of the copper core; by means of the structure, the absorptivity of the copper powder to near-infrared laser of 1064 nm and the like can be remarkably improved to 30% or above, and therefore the problems that pure copper is poor in melting and multiple in forming defect due to high reflectivity in laser additive manufacturing are effectively solved. The composite powder can be directly used for existing selective laser melting or directional energy deposition equipment, has great significance in achieving high-density copper part forming under medium power, and is convenient to prepare, low in cost and high in practicability.

The invention discloses a brush wire rigidity detection device for an aero-engine brush seal, belongs to the technical field of aero-engine seal part testing devices, and solves the problem of accurate detection of the brush wire rigidity of the brush seal. Comprising a high-precision annular base (with a sliding rail), a three-axis displacement adjustable sliding block assembly and a bimodal displacement monitoring system composed of a high-speed microscopic vision acquisition module and an infrared laser displacement sensing device. A high-pressure sealed cabin is arranged on the periphery of the base, an intelligent pressure applying mechanism based on the cam-sliding block principle is arranged in the center of the base, a servo motor drives a cam disc to convert rotary motion into high-precision radial displacement, and a force sensing module and a safety gap are integrated to form pressure closed-loop control. The sample fixing device is compatible with samples with different diameters through adjustment of an electrodeless light ring, and a high-frequency vibration exciter simulates a working environment. Force is applied through the pressure applying mechanism, displacement is monitored through the bimodal system, and the rigidity of the brush wire is accurately measured.

The invention discloses an inversion method for obtaining an N2O gas volume mixing ratio profile based on a short-wave infrared laser occultation detection technology. The inversion method comprises the following steps: calculating a short-wave infrared atmospheric refractive index profile at the center position of an N2O gas absorption spectral line; calculating a collision parameter profile according to the short-wave infrared atmospheric refractive index profile, respectively calculating atmospheric transmittance profiles of an N2O gas absorption spectral line and a reference spectral line based on normalized energy data of infrared laser occultation detection, and executing Abel integral inverse transformation on a difference value between the atmospheric transmittance profiles to obtain an N2O gas absorption coefficient profile; converting the N2O gas absorption coefficient profile into an N2O gas initial volume mixing ratio profile; and by taking the N2O gas initial volume mixing ratio profile as an initial value, carrying out analog calculation on an atmospheric transmittance profile after N2O gas absorption, constructing a cost function, carrying out iterative optimization, outputting an N2O gas volume mixing ratio profile, and obtaining a final inversion result. According to the method, the inversion precision is improved.

The invention discloses a metal oxide nano material as well as a preparation method and application thereof, and belongs to the technical field of laser preparation of metal oxides. According to the preparation method disclosed by the invention, the metal salt powder on the surface of the substrate material is treated by utilizing infrared laser, and under the action of the infrared laser, the infrared laser, the metal salt powder and the substrate material generate light-substance interaction including heat transfer and deformation, so that the metal salt powder and the substrate material are subjected to heat transfer and deformation; the metal salt powder is subjected to a chemical reaction, and a large amount of continuous nano metal oxide materials are generated on the surface of the substrate material; the metal oxide nano material obtained by the invention has the advantages of short laser processing time, high energy density, wide material application range and the like, and the product generated by laser processing has the advantages of good crystallinity, patterning and in-situ generation.

A high-strength multi-functional coating with a multi-level structure, and a preparation method thereof are provided. In this application, a high-efficiency cladding method based on infrared laser-plasma synchronous compounding is adopted to prepare a micro-scale columnar crystal structure that is perpendicular to a substrate and serves as a pure thermally and electrically conductive channel, and to prepare submicro- and nano-scale ceramic reinforcement phases between columnar crystals, where the submicro- and nano-scale ceramic reinforcement phases are distributed along grain boundaries. The multi-level organizational structure of this application can simultaneously improve the hardness, wear resistance, and electrical and thermal conductivities of a cladding layer for a copper alloy and can improve the reliability of damage protection for a copper alloy component used in an extreme environment.

The invention is suitable for the technical field of three-dimensional planting management, and particularly relates to a three-dimensional planting field management method and system, and the method comprises the steps: dividing a three-dimensional agricultural planting region, cutting the planting region into a plurality of blocks, collecting the growth data of all agricultural plants through video monitoring equipment disposed in the planting region in advance, and storing the collected growth data in a database; identifying a risk point location, selecting an infrared anchor point, starting a laser generator integrated in the video monitoring equipment in advance, and projecting infrared laser to the infrared anchor point; sending a working instruction to the inspection equipment, shooting a snapshot of the planting area, reading the projection positions of the infrared anchor points, integrating all the infrared anchor points, generating an anchor point group, and positioning the real-time position of the inspection equipment when the real-time position coincides with the projection positions. By determining the management report, defective plants in three-dimensional planting can be found in time, health management of agricultural plants is enhanced, and intelligence and refinement of agricultural production are effectively improved.

The invention discloses a microphone device and method capable of locating a sound source and a digital human device.The device comprises a plurality of basic units and a signal processing module, and each basic unit is composed of pickup microphones annularly and evenly arranged at intervals and an infrared laser distance measuring sensor located in the center; the plurality of basic units are arranged to form a ranging microphone array matrix. The signal processing module synchronously collects a sound signal of the pickup microphone and a distance signal of the infrared laser distance measuring sensor, and firstly processes the sound signal based on a TDOA algorithm to obtain a two-dimensional plane coordinate of a sound source; and positioning a corresponding basic unit according to the two-dimensional plane coordinate, calling a distance signal of an infrared laser distance measuring sensor in the unit, calculating a vertical distance between the sound source and the array matrix in combination with the two-dimensional coordinate, and finally determining a three-dimensional coordinate of the sound source. According to the invention, high-precision sound source three-dimensional positioning is realized.

The utility model discloses a capsule endoscope convenient for on-off control, which comprises a capsule shell, and a battery, a circuit board, a chip, an antenna, a lens module and an LED (light-emitting diode) are arranged in the capsule shell; the device further comprises an infrared photoresistor, an infrared laser light source, an ultraviolet photoresistor and an ultraviolet laser light source. The LED, the infrared photoresistor and the ultraviolet photoresistor are all installed on the lens module, and the infrared photoresistor and the ultraviolet photoresistor are connected with the chip and controlled by the chip. The infrared laser light source and the ultraviolet laser light source are positioned outside the capsule shell; the infrared laser light source is matched with an infrared photoresistor; and the ultraviolet laser light source is matched with the ultraviolet photoresistor. On and off of the capsule endoscope are achieved through irradiation of the infrared laser light source and the ultraviolet laser light source, the capsule endoscope can be matched with a single-lens capsule endoscope and a double-lens capsule endoscope, contact between the capsule endoscope and the outside is reduced under the condition that the size and the shell integrity of the capsule endoscope are not changed, and regular inspection tour and electric quantity checking of the capsule endoscope are facilitated.

The invention belongs to the technical field of metal-based composite material additive manufacturing, and particularly relates to ultrasonic-assisted green laser equipment for copper-based diamond cooling fin machining, which comprises a rack, a printing cabin, a green laser machining system, an ultrasonic-assisted system, a powder spreading system, a gas control system, an intelligent control system and an online monitoring system. By integrating a green laser processing system and an ultrasonic auxiliary system, an ultrasonic-green laser-powder multi-energy field coupling processing system is constructed, the wavelength of green laser is 532 nm, the absorption rate of copper is increased, and compared with traditional infrared laser, low-power and high-efficiency melting of copper can be achieved, the diamond graphitization risk is reduced from the angle of a heat source, and the production cost is reduced. Ultrasonic vibration is transmitted to a molten pool through a substrate coupling type structure, by means of the cavitation effect and the acoustic streaming effect, the interface wettability of copper and diamond is effectively improved, the interface bonding force is enhanced, the interface thermal resistance is reduced, meanwhile, grains are refined, pores are eliminated, residual stress is reduced, and the comprehensive performance of the cooling fin is remarkably improved.

The invention relates to the technical field of metallurgy preparation of heterogeneous materials, in particular to an efficient laser cladding preparation method of nickel-based superalloy on the surface of copper alloy, which comprises the following steps: increasing the absorptivity of the copper alloy to infrared laser through preheating, and carrying out laser cladding on GH3625 alloy on the surface of Cu-Cr-Zr alloy through regulating and controlling the components of a copper alloy / nickel alloy intermediate layer, so as to prepare the nickel-based superalloy on the surface of Cu-Cr-Zr alloy. And formation of a microstructure in the non-equilibrium solidification process is controlled, the process is optimized, and the mechanical property of the material is improved. According to the method, the intermediate layer is utilized to perform non-equilibrium state metallurgy preparation of the GH3625 alloy on the surface of the Cu-Cr-Zr base material, compared with the method without adding the intermediate layer, after the intermediate layer is added, the content of the copper element in a molten pool is increased, liquid-phase separation is promoted, a large-range Ni-Cr core shell is formed to serve as a low-energy nucleation site, crystal grains are refined, and the performance of the Cu-Cr-Zr alloy is improved. Further, a fine grain strengthening effect is achieved; the thickness of the element diffusion layer is also increased by adding the middle layer, the element uniformity is promoted, the dependence on Malangori is reduced, the heat input is reduced, the optimization of process parameters is realized, and the mechanical property of the heterogeneous material is further improved.

To sufficiently activate impurities to form a collector layer and a cathode layer.SOLUTION: A method includes preparing a semiconductor substrate 10, ion-implanting a second impurity I2 of a second conductivity type that constitutes a collector layer 21 from the other surface 10b side, ion-implanting a third impurity I3 of a first conductivity type that constitutes a cathode layer 22 from the other surface 10b side, irradiating with a Gr laser to activate the second impurity I2 and the third impurity I3 located on the other surface 10b side to form a first collector layer 21a and a first cathode layer 22a that are portions of the collector layer 21 and the cathode layer 22 on the other surface 10b side, and after irradiating with the Gr laser, irradiating with an Ir laser to activate the second impurity I2 located between the first collector layer 21a and the FS layer 20 and the third impurity I3 located between the first cathode layer 22a and the FS layer 20 to form a second collector layer 21b and a second cathode layer 22b.SELECTED DRAWING: Figure 3F

The invention relates to the technical field of hybrid bonding, in particular to a laser-assisted hybrid bonding interconnection method, which comprises the following steps of: S1, processing the surface of a wafer to enable the to-be-bonded surface of the wafer to be flat; s2, cleaning a to-be-bonded surface of the wafer, and removing organic pollutants and an oxide layer; s3, aligning and fitting the surfaces to be bonded of the two wafers; s4, enabling the to-be-bonded surfaces to comprise dielectric layers and metal interconnection points, irradiating the dielectric layers with infrared laser, and carrying out the interconnection of the dielectric layers of the two to-be-bonded surfaces; and S5, the metal interconnection points are heated by blue laser, and the metal interconnection points of the two surfaces to be bonded are interconnected. In the hybrid bonding stage, the infrared laser and the blue laser are used for bonding the dielectric layer and the metal interconnection point respectively, partitioned irradiation and differentiated heating of the metal interconnection point and the dielectric layer are achieved, the problems of interface warping, microcracks and other thermal damage are effectively avoided, and the interconnection quality and the packaging reliability are improved.

The invention discloses an integrated nano platform for bimodal detection and synergistic sterilization of pathogenic bacteria as well as a preparation method and application of the integrated nano platform, and belongs to the technical field of food safety. The platform is composed of a multifunctional nano probe (MPDA / Pd SA-DA-CDs / Apt) and a magnetic separation assembly (MNRs / PGA / AM). The probe integrates enzyme-like catalysis and photo-thermal performance and is used for generating colorimetric and photo-thermal dual-mode signals so as to realize high-sensitivity and high-reliability detection of pathogenic bacteria. The magnetic separation assembly is used for specifically capturing and enriching target bacteria and eliminating matrix interference. After detection is positive, the platform can immediately start secondary propulsion synergistic sterilization: firstly, the action distance is shortened through magnetic aggregation, and then pathogenic bacteria are efficiently inactivated and biological membranes are disintegrated by utilizing the synergistic effect of near-infrared laser excitation photothermal effect and active oxygen. According to the invention, the integration of detection and disinfection is realized, the operation is convenient, and the method has important application value in the fields of food safety and biomedicine.

An apparatus and method directed to sample characterization with an AFM using a pulsed IR laser in force volume mode, i.e., force volume mode combined with AFM-IR, referred to herein as FV AFM-IR. In this way, lateral forces are suppressed during probe positioning, and precise force control allows adjusting the tip-sample interaction force, including keeping the tip-sample interaction force constant or exerting pulling forces. Nano-spectroscopic measurements with sub-20 nm, and even sub-10 nm resolution can be acquired together with nano-mechanical and other property measurements. Notably, probe resonance shifts can be compensated with frequency tracking methods, and signal normalization by the Q-factor can be used to ensure that the extracted light-induced surface pulse force is substantially independent of damping.

The embodiment of the invention provides an infrared touch control device, projection equipment and an infrared touch control method, which are used for solving the technical problem of insufficient convenience of the existing key type interaction mode. The infrared touch device comprises a frame shell, an infrared laser transmitter, an infrared camera and a function processing circuit. According to the infrared touch device, the projector is used for projecting a control menu picture, an invisible infrared light plane is formed through the infrared laser transmitter, the control menu picture and the infrared light plane jointly form a virtualized interaction interface, and then interaction behaviors of a user are sensed in real time through the infrared camera. Therefore, seamless fusion of the interactive behavior and visual feedback of the user is realized, and the instant response touch function provided by the physical touch screen is reproduced by adopting different technical paths, so that the interactive process is simpler, more visual, more natural and more convenient, and the user experience is greatly optimized.