303 results about "Ir laser" patented technology

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 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 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 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.

The invention discloses a water-based environment-friendly coating and local printing transfer paper thereof, and particularly relates to the technical field of water-based environment-friendly coatings. The water-based environment-friendly coating is prepared from a water-based epoxy ester dispersion, an organic silicon modified polyvinyl butyral emulsion, a gas-phase method aluminum oxide nano dispersion, a fluorocarbon surfactant, a self-crosslinking polyether thickening agent and a propylene glycol methyl ether acetate-water azeotropic quick-drying auxiliary agent. According to the coating, through cooperation of specific components and process control, the drying speed is remarkably increased, the surface drying time is shortened, meanwhile, shrinkage cavities are eliminated, the hardness of the coating is enhanced, and the edge transfer precision is improved. Corona treatment is adopted for the corresponding local printing transfer paper, gravure precise coating, infrared pre-drying and gradient hot air drying are matched, and finally clear separation and transfer of a coating are achieved through infrared laser scanning. The whole system is a water-based formula, is environment-friendly and safe, is suitable for the field of high-end printing, and has the comprehensive advantages of high drying speed, high precision, strong adhesive force, simplified process and the like.

The invention discloses a laser deicing method and device based on ice layer thickness and surface state recognition, belongs to the technical field of fan blade deicing, and aims to solve the problems of low efficiency, large energy loss and high blade damage risk caused by incapability of accurately sensing the ice layer state in the conventional fan blade laser deicing technology. The system comprises an active sensing module and a laser clearing module. The active sensing module measures the thickness and the surface state of an ice layer through infrared laser, and performs multi-dimensional monitoring in combination with a laser radar, a camera and a thermal infrared imager. And the laser clearing module dynamically adjusts laser parameters for deicing according to the sensing result. According to the invention, a non-contact ice thickness measurement method based on infrared laser and a surface state identification method based on relative illumination intensity are created for the first time, and accurate sensing of the ice layer state is realized. A laser and a power supply are fully integrated in the unmanned aerial vehicle, the constraint of a ground platform and optical fibers is eliminated, and the deicing task of the fan blade is accurately completed.

A signal filtering and concentration inversion method for infrared laser detection, implemented through a signal filtering and concentration inversion system for infrared laser detection, includes the following steps: S1, building a transmissive-type infrared laser gas detection system at an on-site detection location, setting fixed parameter information, and establishing normal communication on an optical detection part and obtaining a first-harmonic signal; S2, performing amplification-processing on the first-harmonic signal to obtain a second-harmonic signal, and introducing the second-harmonic signal into a laser filtering-processing model to obtain a denoised second-harmonic signal; S3, inputting the first-harmonic signal and the denoised second-harmonic signal into a concentration inversion model to obtain a concentration signal of a to-be-detected gas; and S4, determining, based on the concentration signal of the to-be-detected gas, whether a hazardous gas limit has been exceeded at the on-site detection location.

The invention belongs to the technical field of flexible electronics and sensing, and relates to a stepped multi-mode flexible sensor based on laser-induced graphene and a preparation method of the stepped multi-mode flexible sensor. The sensor comprises a humidity sensitive layer, a pressure sensitive layer, a strain sensitive layer and a temperature sensitive layer which are sequentially stacked in a stepped mode from top to bottom, each sensitive layer comprises a flexible substrate, a laser-induced graphene (LIG) electrode and a connecting area penetrating through the flexible substrate, and the sensitive layers are connected in series through the connecting areas. Through an infrared laser processing method, all the sensitive layers are broken through, all the sensing sensitive layers are communicated, and assembling is carried out. And independent sensing of each physical quantity is realized by leading out a corresponding port on each sensing sensitive layer. According to the stepped structure, spatial isolation is carried out through the flexible substrate, signal crosstalk is reduced, low-cost and high-precision manufacturing is achieved in combination with the laser direct writing process, and the stepped structure is suitable for the fields of medical health monitoring, industrial equipment diagnosis, intelligent robots and the like.

The invention discloses an automatic welding process combining laser scanning with visual inspection. The process specifically comprises four working procedures of laser scanning before welding, automatic wire feeding, automatic welding and online tracking detection in welding. The specific implementation effects of each process are as follows: the pre-welding laser line scanner scans a weldment by emitting a laser beam to extract three-dimensional information of the weldment, so that a welding route is conveniently planned, and a walking route is fed back to the control cabinet; the control system can receive an instruction to control the driving system to carry out an automatic welding process, so that the welding gun reaches a specified position to carry out automatic welding; in the welding process, the infrared laser tracker dynamically tracks the welding gun, corrects the walking route and guides the compound eye camera to conduct visual inspection so as to judge the welding quality, and the machining targets that components at the welding seam connecting position are uniform, and the welding seam surface is high in quality and low in defect are achieved.

The invention discloses a tapping and drilling integrated intelligent numerical control lathe, and relates to the technical field of numerical control lathes, the tapping and drilling integrated intelligent numerical control lathe comprises a machine shell, a first servo motor and a threaded rod, a sliding groove is formed in the lower portion of the interior of the machine shell, the U-shaped plate is fixed to the bottom end of the interior of the machine shell, the first servo motor is fixed to the bottom end of the interior of the machine shell, and the threaded rod is fixed to the bottom end of the interior of the machine shell. The threaded rod is rotatably installed on the left side and the right side of the inner wall of the U-shaped plate in a penetrating mode, the left end of the threaded rod is fixedly connected with the right end of a rotating shaft of the first servo motor, a non-self-locking type threaded groove is formed in the outer wall of the threaded rod, and an inner screw pipe is engaged with the outer wall of the threaded groove of the threaded rod and is slidably installed in the inner wall of a sliding groove of the machine shell; according to the device, the drilling position is pre-positioned through infrared laser by means of the tapping drill bit, and therefore the problem that workpieces are unqualified due to the fact that the tapping drilling position deviates is avoided.

Disclosed in the present invention are a reaction device for narrow-band luminescence indium phosphide quantum dots, and a method for producing narrow-band luminescence indium phosphide quantum dots using the reaction device. The reaction device comprises a high gravity device and a photothermal device, wherein the high gravity device comprises a housing, an electric motor, a rotating disk, shear packing, a liquid distributor, a reaction chamber, a packing cover, a gas outlet, a liquid outlet and liquid inlets; and the photothermal device comprises a laser heating device, a circuit and water cooling device, a reflective layer and a laser controller. In the present invention, infrared laser is coupled into a high gravity reactor, and solvent media such as water or organic compounds are used to absorb infrared light and convert same into thermal energy to raise the temperature of the high gravity reactor, so as to initiate a nucleation reaction of a reactant precursor in a "micro-droplet reactor", thereby realizing the controllable growth of quantum dots in the micro-droplet reactor; and then nanoparticles of uniform size are finally obtained by means of controlling the laser irradiation and heating duration.

An aerosol-generating element for generating an aerosol in a shisha device, the aerosol-generating element includes a receptacle for receiving an aerosol-forming substrate and a photonic device configured to generate a beam of IR radiation. The aerosol-generating element is arranged to heat the aerosol-forming substrate by directing the beam of IR radiation onto the aerosol-forming substrate. The photonic device includes an IR laser diode. The range of wavelengths of the beam of IR radiation is from 1300 nanometers to 2000 nanometers.

This application discloses a battery string and its fabrication method, as well as a photovoltaic module. The fabrication method of the battery string includes the following steps: providing a plurality of battery cells, electrical connectors, and a protective layer; wherein adjacent battery cells are partially overlapped, each battery cell includes a current collecting layer, the electrical connectors are connected to the current collecting layers of the battery cells, and the electrical connectors have a designated area to be broken by a laser; the protective layer is disposed between the battery cells and the electrical connectors, and the protective layer corresponds to the designated area; the laser is applied to the designated area to break the electrical connector; wherein the protective layer includes a film layer with an absorbance greater than or equal to 50%, and / or a film layer with a reflectance greater than or equal to 65%; when the laser is an infrared laser, the protective layer includes a film layer with an absorbance greater than or equal to 50% and a film layer with a reflectance greater than or equal to 65%. This application can effectively enhance the protection effect of the battery cells when the laser breaks the electrical connectors, reducing the possibility of battery cell damage or breakage.

The invention provides a temperature control method of an intermediate infrared laser, and relates to the technical field of lasers. The temperature control method comprises the steps that the reference temperature T0 of the intermediate infrared laser is set, and driving current is injected into the intermediate infrared laser; in any nth period of the driving current, initial temperature parameters of the intermediate infrared laser are collected, and an initial temperature control curve T (n) of the nth period is formed; forming a reference temperature curve T1 (n) in the nth period based on the initial temperature control curve T (n); forming a gradient temperature control curve of the nth period based on the initial temperature control curve T (n), the reference temperature curve T1 (n) and the reference temperature T0; and forming temperature control data based on the gradient temperature control curve, and storing the temperature control data in the temperature control device, so that the temperature control device performs temperature control on the intermediate infrared laser according to the temperature control data. The invention further provides electronic equipment and a temperature control device.

The invention discloses a double-beam scanning photoelectric sensor and a control method, and aims to solve the problem of false triggering when an existing sensor detects an object with a gap or high light reflection. The sensor is mainly composed of a light beam transmitting module, a light beam receiving module, a control processing module and an output module. Wherein the light beam emitting module is composed of two independent infrared lasers and can synchronously emit parallel light beams with the diameter of 1.0-2.0 mm; a state machine logic unit is arranged in the control processing module, output is triggered only when two paths of signals exceed a set threshold value by comparing the intensity of the double-beam signals in real time, and the current output state is maintained when any path of signal is lost; the output module provides an uninterrupted NPN / PNP switching signal. Through double-beam cooperative scanning and special control logic, stable detection can be provided for regular gap objects such as printed circuit boards and trays, transparent or highly reflective materials can be effectively handled, and the false triggering rate is remarkably reduced while the detection reliability is improved.

The application relates to the field of laser technology, in particular to a device and a method for generating wide-tuning narrow-line-width mid-infrared laser, wherein the pump light emitted by a nanosecond pulse OPO base frequency pump source is reflected to a beam splitter by a full reflection mirror after passing through a first adjuster; the pump light emitted by a continuous wave OPO base frequency pump source is irradiated to the beam splitter after passing through a second adjuster; the two beams of pump light are combined after passing through the beam splitter, are focused after passing through a plano-convex lens, are irradiated to a first plano-concave full reflection mirror, and then are transmitted to a nonlinear crystal to generate signal light and idler mid-infrared laser through nonlinear frequency conversion; the idler mid-infrared laser and the residual pump light are transmitted to a doublet mirror and are separated by the doublet mirror; the signal light is reflected to the nonlinear crystal in sequence through a second plano-concave full reflection mirror, a first plane full reflection mirror, a second plane full reflection mirror and the first plano-concave full reflection mirror, and an oscillation closed loop is formed. The application realizes that the pulse OPO outputs a pulse with a line width less than 90 MHz in the tuning range, and the extraction efficiency of the idler light is as high as 9.3%.

The application discloses a kind of based on molten pool state feedback's titanium alloy laser welding pore control method and system, by design adjustable electromagnetic stirring power and frequency electromagnetic generating module connection magnetic field exerting component, establish the matching process parameter library of electromagnetic stirring and laser welding, cooperative adjustment infrared blue light composite laser welding process parameter, including infrared laser power, blue light laser power, welding speed and defocusing amount.Again using high-speed camera device carries infrared thermal imaging monitoring molten pool state, simultaneously construct real-time monitoring and feedback control system, to realize titanium alloy welding overall closed-loop control.Adopt the method of the application can realize the stirring of molten pool in laser welding process, make pore effectively escape, avoid the pore defect caused by gas not in time to escape under the condition that laser welding cooling speed is faster.Titanium alloy laser welding pore rate is reduced to 2% and below, compared with traditional laser welding method reduces more than 80%, significantly improves welding quality stability.

The utility model relates to the technical field of automatic alignment devices, and discloses an automatic alignment device for a formwork, which comprises a pouring furnace body, a control computer is fixedly mounted on the left side of the pouring furnace body, and an infrared laser generator and a camera are fixedly mounted on the inner side of the top of the pouring furnace body. A double-shaft moving platform is fixedly mounted on the inner side of the bottom of the pouring furnace body, an ash removal mechanism is arranged outside the double-shaft moving platform, and a formwork table placing mechanism is arranged on the top of the top ash removal mechanism. According to the automatic alignment device for the mold shell, the position of the mold shell can be adjusted in a two-way mode through transmission of the arranged double-shaft moving platform, then the device adapts to diversified production of poured products, meanwhile, the position of the mold shell can be adjusted under assistance of an infrared laser generator and a camera, and a sealing rotating cover drives an air outlet pipe to rotate; and dust and chippings on the surface of the threaded rod in the double-shaft moving platform are removed, and the operation stability of the automatic mold shell alignment device is improved.

The present application relates to the technical field of welding positioning and machine vision, and particularly relates to a part positioning device for a welding machine tool, which comprises a protection window, an objective lens, a quarter-wave plate, a polarization beam splitter prism and an imaging unit located at the transmission end of the polarization beam splitter prism, which are arranged in sequence along the same main optical axis; further comprising a laser emission unit connected to the side end of the polarization beam splitter prism; further comprising a calculation and output unit electrically connected to the imaging unit; wherein the laser emission unit emits linearly polarized near-infrared laser, which is reflected by the polarization beam splitter prism and then irradiated to the workpiece surface along the main optical axis through the quarter-wave plate and the objective lens in sequence; the return light from the workpiece passes through the objective lens and the quarter-wave plate in sequence along the main optical axis; in the present application, the emission and imaging share the same main optical axis, which is naturally aligned with the movement direction of the machine tool, the shielding and blind area are significantly reduced, and the cross light and ghost image are effectively suppressed, so that the precise positioning of the weld path is completed.

The present application relates to the technical field of agricultural equipment, and discloses an alfalfa planting and topdressing device and a topdressing method, which comprise: a lightweight mobile frame, a connecting head connected with a power end, a front wheel and an infrared laser radar arranged at the front end, and an adjustable rear wheel group arranged at the rear end; a multi-modal detection unit integrated with the front wheel, a detection surface of the multi-modal detection unit and a scanning direction of the infrared laser radar form a spatial orthogonal layout, and the multi-modal detection unit comprises: a rolling trigger type gamma ray sensor which periodically emits rays while rotating with the front wheel; through the cooperative work of the multi-modal detection unit, the present device realizes comprehensive perception of soil deep nutrients, ion concentration, surface moisture and plant canopy, combines the terrain scanning function of the infrared laser radar, and dynamically generates a fertilizer formula and adjusts fertilization parameters, so that the precision and adaptability of fertilization are significantly improved, and the limitations of traditional single detection means are avoided.

The utility model relates to the technical field of seedling raising devices, in particular to a seedling raising device for rice planting, which comprises a rotating disc, a sprinkler pipe, a light shield, a seedling raising box and an adjustable seedling raising hopper, through the design that the rotary sprinkling pipe is matched with multiple groups of spray pipes, uniform sprinkling of a water and fertilizer solution in the seedling raising box is realized, the problem of uneven dryness and humidity caused by traditional manual watering is avoided, root rot or local drought is effectively prevented, and the germination rate and the seedling uniformity are improved; the adjustable seedling raising hopper driven by an air cylinder is adopted, the seedling raising depth can be flexibly adjusted according to the root system requirements of different rice varieties, the root system growth environment is optimized, the transplanting survival rate is increased, the light shield is provided with an adjustable light source, the seedling raising state is monitored in combination with an infrared laser, precise light supplementing or shading is achieved, and the illumination requirements of different growth stages are met; healthy growth of seedlings is promoted, and the overall seedling raising effect is improved.

The present application relates to the technical field of wireless charging, and particularly relates to a safety interlocking system for infrared laser long-distance wireless charging; through cooperation of spatial distribution of multiple photodiodes and hardware structure, when the light path is invaded by foreign matters, the control circuit can quickly cut off the high-power laser output, and the three-dimensional layout eliminates the spatial blind area of single-point detection, the polarization discrimination element in the transmitting end device and the phase delay element in the receiving end device are combined to construct an optical encryption closed loop, only the light received by the sensor after being inversely reflected to the receiving end rotatable polarization state is allowed, the in-phase polarized light reflected by ordinary mirror foreign matters is effectively blocked, the risk of mirror deception reflection attack in the high-power scene is greatly reduced, and through the pure hardware phase-locked loop frequency decoding circuit, only the reflected light output logic level carrying the preset modulation frequency is output, direct current and low-frequency interference of sunlight and illumination light sources are filtered from the physical layer.

The utility model discloses a high-precision laser cutting machine capable of achieving infrared laser ranging, and belongs to the technical field of cutting machines. The high-precision laser cutting machine capable of achieving infrared laser distance measurement comprises a cutting machine tool, a laser cutting assembly is installed on the cutting machine tool, a feeding belt and a material conveying roller are installed on the portions, on the two sides of the laser cutting assembly, of the cutting machine tool, and two infrared laser measuring instruments are arranged at the end, close to the material conveying roller, of the cutting machine tool. According to the high-precision laser cutting machine capable of achieving infrared laser distance measurement, the infrared laser measuring instrument is used for monitoring the position and the deflection condition of a plate in real time, automatic adjustment is achieved, the cutting accuracy and consistency are greatly improved, cutting errors caused by misalignment of materials are reduced through an effective deflection correction mechanism, and therefore the rejection rate is reduced, and the production efficiency is improved. The independently-controlled belt body allows optimization treatment for plates of different shapes and sizes, and the application range of the equipment is widened.

The invention discloses an ultrasonic infrared laser device for detecting a vertical shaft pilot tunnel, and the device comprises a mounting seat plate which is disposed in a cutterhead crown. The device mounting frame is mounted on the mounting seat plate; the ultrasonic radar and the infrared laser are both mounted on the device mounting rack; the control box is connected with the ultrasonic radar and the infrared laser; the system comprises an integrated sensor, an adjustable installation structure and a wireless control system, the integrated sensor is provided with a wireless sensor, the terminal host is provided with a wireless receiver, the control box can transmit data to the wireless receiver in a wireless mode, and the terminal host analyzes the blockage condition through the data. An ultrasonic radar and an infrared laser are integrated, and the complementary advantages of long ultrasonic detection distance and clear infrared laser contour recognition are utilized to accurately recognize the anomalies such as blockage and collapse in the pilot tunnel.

The application discloses a comprehensive testing device for the thermophysical properties of ceramic materials, and aims to improve the accuracy of the testing device for the thermophysical properties of ceramic materials.The comprehensive testing device for the thermophysical properties of ceramic materials comprises an insulation box, a testing box, a top testing device, an in-box testing device and a cooling and atmosphere control device, the testing box is arranged in the insulation box, uniform temperature plates are arranged on the left and right box walls and the bottom box wall of the testing box, heating rods are arranged on the outer plate surfaces of the uniform temperature plates, the top testing device is arranged on the top of the testing box, the top testing device comprises two laser scanning range finders, heat insulation glass, a thermal radiation tester and a cooling cavity, and the cooling and atmosphere control device is arranged on the outer box wall of the insulation box.The application adopts a more accurate infrared laser scanning range finding method to test the thermal expansion coefficient, and the thermal radiation intensity of the ceramic material is tested during the testing process, so that the heat insulation performance of the ceramic material during service is evaluated.

This invention relates to an animal behavior detection device and method based on an infrared laser light sheet. The detection device includes a test platform module, an optical path module, an imaging module, and a control module. The test platform module includes a through-hole and a light-transmitting aperture for placing the animal to be tested. The optical path module employs a Powell prism structure, with a one-dimensional laser line generated by the optical path module aligned with the light-transmitting aperture. When the animal behavior detection device is in use, the one-dimensional laser line generated by the optical path module fills the light-transmitting aperture. The imaging module's first camera records changes in reflected light signals, while a second camera uses a beam splitter to record animal behavior. The control module is connected to the first and second cameras, sending trigger signals to them and recording the image data transmitted back by the first and second cameras for subsequent experimental analysis. This invention features a simple and flexible device structure. Parameters such as the light source wavelength and the height of the padding can be adjusted according to the characteristics of the experimental animals.

The utility model discloses a step slope angle rapid measuring device for an open-pit mine, which relates to the technical field of step blasting of open-pit mines and comprises a fixed arm, a protractor, a vertical direction determining piece, an adjusting arm, an infrared laser transmitter and an angle indicating piece. The vertical direction determining piece is arranged on the fixed arm so as to determine that the fixed arm is in a vertical state and enable the bottom edge of the protractor to be in a vertical state, and the adjusting arm is rotationally connected with the protractor and can rotate around the axis of the protractor. The infrared laser emitter is fixedly connected to the end, away from the axis of the protractor, of the adjusting arm so as to emit laser and be positioned to the step slope bottom position, the extension line of the laser penetrates through the axis of the protractor, the angle indicating piece is arranged on the adjusting arm and can indicate the angle when the adjusting arm rotates to the measuring position, the structure is simple, and use is convenient. Use is convenient, and the construction progress is effectively guaranteed.

The invention relates to a method for determining the blood alcohol content (BAC) of a person in a vehicle (1), comprising the following steps: acquiring one or more images of the person in the vehicle (1) by means of one or more imaging units (2) arranged on the vehicle; the images are analyzed through a data processing unit (3), and human body data and face data of the person are determined through a database (5); calculating three-dimensional target vectors V1 and / or V2 of the mouth and / or nose of the person relative to an alcohol air detector (4) arranged in the vehicle (1) according to the facial data, in particular an infrared laser spectrometer for directional non-contact detection; the alcohol air detector (4) is started, and the expiratory alcohol concentration (BRAC) of the mouth and nose area of the person is measured in combination with the target vector V1 and / or V2; calculating a correction coefficient K in combination with human body data (especially gender, weight, age and / or height) of the person; and determining the blood alcohol content through a formula BAC = K * BRAC.

The invention provides a large aspect ratio conductive circuit ink-jet printing method, which specifically comprises the following steps: in an ink-jet printing process, controlling an emission angle of an infrared laser, keeping an intersection point of laser emitted by the infrared laser and an ink droplet falling track of a printing head above a printing substrate, and presintering and curing ink droplets before the ink droplets fall on the surface of the printing substrate; the invention further provides an ink-jet printing device for the conductive circuit with the large height-width ratio and an application method of the ink-jet printing device. The nano-silver ink for ink-jet printing is rapidly sintered through laser in the flying process, the high-performance conductive trace can be directly manufactured on the substrate, and the manufacturing efficiency and the quality of the final electronic trace are remarkably improved through the collaborative process of presintering in the ink droplet flying process and synchronously preheating the substrate; the large-aspect-ratio conductive circuit ink-jet printing device for achieving the method is simple in structure, flexible and convenient to operate and high in practicability, and the focusing accuracy of laser and ink droplets is improved.

The utility model relates to perpendicularity detection technical field especially is a tower crane perpendicularity detection device, including a plurality of independent setting emission end and with a plurality of emission end cooperation setting receiving end, the emission end can be detached and installed on the standard knot of tower crane, the emission end includes the shell, and the one side end of shell one side is equipped with battery compartment, the inside of this battery compartment is provided with detachable battery module, and the one side of battery compartment is provided with infrared laser emission module, the utility model discloses that laser measurement technology provides real -time, continuous perpendicularity detection, and the measurement result has the high stability and repeatability, whether in the dynamic state when tower crane operation, or under the static state, can keep consistent measurement accuracy, so that the tower crane can real -time correction perpendicularity in the construction process, ensure the stability of tower body, reduce the security risk caused by deviation, provide strong guarantee for the safety of engineering construction.