545 results about "Heat effect" patented technology

The invention discloses a control method and system of a servo press, and relates to the field of press control, a force displacement curve is obtained in real time from a current punching period, a key feature vector of the force displacement curve is extracted, the key feature vector is compared with an ideal golden feature vector, and a multi-dimensional deviation vector is obtained. Particularly, a deviation decoupling method based on morphological analysis is introduced, and the total deviation can be accurately decomposed into a thermal drift compensation amount caused by the thermal effect of equipment and a material characteristic compensation coefficient caused by plate performance fluctuation by analyzing translation and zooming differences of a current curve and a gold curve in form. Therefore, independent and accurate compensation can be carried out for a physical source, the problems of information aliasing and compensation failure caused by the fact that disturbance sources cannot be distinguished in the prior art are effectively solved, intelligent and feed-forward type cooperative compensation for the next stamping period is achieved, and long-term stability and high precision of the production process are ensured.

The invention discloses a control method and system for enhancing repetition precision of a laser galvanometer, and the method comprises the steps: collecting laser power fluctuation and mirror surface temperature sequence data, obtaining a heat effect state vector through preprocessing, carrying out the noise interference updating of the heat effect state vector, inputting the heat effect state vector into a neural network model, and obtaining a preliminary thermal deformation predicted value; calculating an angle compensation parameter in combination with a preset compensation matrix to obtain a preliminary compensation signal; posterior state estimation correction is carried out, control parameters are adjusted, and enhanced compensation signals are obtained; then generating an instruction input sequence and carrying out iterative optimization to obtain an optimized angle compensation parameter; fusing position feedback to obtain a stable output track; and calculating the deviation between the angle compensation parameter and the real-time trajectory data, optimizing a heat effect state vector to obtain an optimized heat effect state vector, and recalculating the angle compensation parameter to obtain a final angle compensation parameter. According to the method, the track precision and stability of the laser galvanometer system under the complex heat effect can be remarkably improved.

The invention discloses a method and application for ultrasonic-assisted laser additive manufacturing of a multi-scale structure coupling high-toughness aluminum alloy, and the method comprises the steps that high-Ni-content alloy steel powder is refined through high-energy ball milling, and then the refined alloy steel powder is dispersed and distributed in Al-Mg-Sc-Er-Zr alloy powder; an ultrasonic energy field is introduced to assist selective laser melting to form mixed powder, the ultrasonic energy field assists in generating nonlinear effects such as cavitation, acoustic streaming and heat effect, defects such as air holes and cracks are overcome to eliminate residual stress, and the Marlangoni effect is accelerated to increase the solidification speed; and finally, the high-strength and high-toughness aluminum alloy which has high density and is composed of micron-scale, submicron-scale and nano-scale multi-scale phase structures is prepared. The production cost is low, and the room-temperature tensile properties of the prepared high-strength and high-toughness aluminum alloy are as follows: the strength is greater than 850 MPa, and the fracture strain is greater than 6%.

The invention discloses a marking path optimization method and system for a wiring terminal shell laser marking machine, and relates to the technical field of laser marking path planning, and the method comprises the following steps: obtaining the geometric information of a wiring terminal shell, identifying a marking area, and dividing the wiring terminal shell into a plurality of subfields according to the scanning range of a galvanometer; constructing a composite cost function according to a subfield division result, and solving a global optimal access sequence through a genetic algorithm by taking each subfield as an optimization node and the composite cost function as a target value; respectively optimizing the contour path and the filling path in the subfield to obtain an optimized local path; combining the global optimal access sequence with a local path, performing constraint verification on the path, generating an execution track, calling initial parameters according to material characteristics, and performing dynamic matching in combination with path characteristics; through coordinate registration, subfield division and path optimization, the problems of insufficient precision, low efficiency and poor heat effect control are solved.

The invention belongs to the technical field of electrical equipment safety monitoring, and provides an intelligent wire and cable distributed optical fiber temperature measurement early warning method and system, and the method comprises the steps: laying a distributed optical fiber temperature sensor network along a cable, and synchronously demodulating the temperature and strain information based on a distributed optical fiber sensing principle; the temperature, the strain information and the load current are uploaded to a cloud platform through a wireless communication module; operating a time-space fusion diagnosis model driven by a cable physical mechanism on a cloud platform to distinguish and position an abnormal overheating section caused by a current Joule heating effect, insulation loss or contact resistance dramatic increase; and after the abnormity is confirmed, the cloud platform generates a control instruction for the abnormal overheating section to cut off power supply, and an intelligent self-healing process can be started. According to the invention, physical root identification, accurate positioning and safe self-healing of the cable overheating fault are realized, and the safety of cable operation is greatly improved.

The utility model discloses a special rail for laser low-temperature cleaning based on a high-speed rail wheel set, which is characterized in that a section is cut from the middle of a traditional fixed rail, a movable rail capable of swinging is arranged, a train can be supported to pass through, a position can be reserved to lift a water tank, and the rim of a hub on one side of the wheel set can be submerged into the water tank for laser low-temperature cleaning. The laser-induced cavitation technology is used for low-temperature cleaning, the laser heat effect can be reduced, surface damage caused by the heat effect is avoided, the hub and the rim of the high-speed rail wheel set can be cleaned under the condition that the wheel set is not disassembled, and the cleaning period can be shortened.

The invention relates to insulation performance testing of superconducting equipment of an electric power system, in particular to a superconducting quench bubble, insulation barrier and liquid nitrogen composite insulation breakdown voltage testing method considering the influence of a bubble heat effect. Comprising the following steps: S1, acquiring the relation between the resistance and the surface temperature of the superconducting conductor in a quenching interval; s2, arranging a dielectric barrier member between the superconducting current limiting unit and the electrode; and S3, driving the superconducting current limiting unit to quench, and measuring the breakdown voltage between the superconducting current limiting unit and the first electrode. And S4, determining the representative value of the surface temperature of the superconducting conductor in the quenching process. And S5, performing heat and force coupling numerical simulation. And S6, measuring the change relation of the parameters of the insulation barrier along with the temperature. And S7, obtaining a key electrical parameter corresponding to the temperature parameter T in the step S5. According to the invention, accurate quantification of the influence of the quench bubble heat effect on the composite insulation breakdown characteristic is realized.

The invention provides a multi-energy-field auxiliary laser drilling method and device for a silicon carbide micropore with the large depth-diameter ratio, and relates to the technical field of hard and brittle material precision machining.The multi-energy-field auxiliary laser drilling method for the silicon carbide micropore with the large depth-diameter ratio comprises the following steps that a silicon carbide workpiece is ablated layer by layer through an ultrafast laser beam to form the micropore; and in the layer-by-layer ablation process, the workpiece or the ultrafast laser beam generates relative high-frequency micro-amplitude ultrasonic vibration in the axial direction of the micropore, and the low-temperature high-speed air flow is coaxially guided to an ablation point of the ultrafast laser beam so as to remove ablation products and cool the ablation point and the adjacent area of the ablation point. Through organic combination and synergistic effect of ultrafast laser ablation, ultrasonic vibration in the axial direction of a drill hole and coaxial low-temperature high-speed airflow, the problems that in the prior art, due to unsmooth chip removal of ablation products and the remarkable heat effect, the machining depth is limited, the hole wall quality is poor, and the machining efficiency is low are solved.

The invention discloses a heat conduction type heat dissipation cable, and relates to the technical field of heat dissipation cables, the heat conduction type heat dissipation cable comprises a central capillary main pipe, a plurality of conductor strands are arranged on the outer side of the central capillary main pipe, a heat dissipation ring is arranged on the other side of each conductor strand, and a plurality of first heat dissipation holes are integrally formed in the heat dissipation ring; according to the invention, heat generated by the conductor strands is quickly transmitted through the heat conducting column, and the magnetic conductive sheet and the magnetocaloric material sheet are matched to generate magnetocaloric effect by utilizing magnetic field intensity fluctuation caused by current change: when the current is increased, heat is released to strengthen evaporation of a working medium, and when the current is reduced, heat is absorbed to directly cool, so that a self-adaptive heat adjusting mechanism is formed; heat can be quickly transferred through evaporation-condensation of low-boiling-point fluid through phase change circulation of the central capillary main pipe and the branch capillary pipes, and multi-path heat dissipation of the heat dissipation ring and the fins is combined, so that the heat dissipation efficiency under different current loads is improved, and the problem of local overheating is effectively avoided.

The invention discloses a magnesium-based solid hydrogen storage tank integrated with a resistance heating and electromagnetic coupling magnetic field structure, which comprises a tank body and a control cabinet integrated on the outer side wall of the tank body, a plurality of electrode plates are arranged in the tank body, and the electrode plates are electrically connected with a power supply cabinet on the side wall of the tank body through tabs on the electrode plates. The inner space of the tank body is divided into a plurality of hydrogen storage spaces by the plurality of electrode plates, magnesium-based solid hydrogen storage materials containing magnetic alloy metal and carbon materials are added into the hydrogen storage spaces through material adding ports formed in the outer side wall of the tank body, a temperature sensor is arranged in each hydrogen storage space, and a pressure sensor is arranged at the top of the tank body; a hydrogen inlet / outlet is formed in the top end of the tank body; a communicating hole for communicating two adjacent hydrogen storage spaces is formed in the center of the electrode plate. Through the synergistic effect of an electric field and a magnetic field, the thermal management performance of the magnesium-based hydrogen storage material is effectively improved, the hydrogen desorption cold start time is shortened, the thermal effect influence in the hydrogen charging and desorption process is reduced, stress concentration caused by volume expansion is relieved, and the hydrogen storage and release performance of the magnesium-based material is improved.

The invention discloses a parameter prediction method and device, electronic equipment and a storage medium. According to the method and the device, the essential rule of a salt cavern gas storage system is described on the basis of a physical driving model; meanwhile, systematic errors, caused by parameter simplification, ignoring of shaft dynamic heat exchange and other effects, of a pure mechanism model are accurately learned and compensated by means of a data driving model, and advantage complementation is achieved through fusion of the two; the technical problem that systematic deviation is generated between model output and actual operation data due to the fact that rock and soil mechanical parameters are simplified, a fixed friction coefficient is adopted or a shaft dynamic heat exchange effect is ignored in an existing pure mechanism model under complex geological conditions can be solved. The technical effects of improving the accuracy and reliability of thermodynamic parameter prediction of the salt-cavern gas storage system, adapting to complex geological conditions and further guaranteeing stable operation of the compressed air energy storage system are achieved.

The invention discloses an aero-engine turbine blade material in-situ mechanical test system and method, and the system comprises a multi-axis loading unit which is used for simulating the multi-axis stress state of a turbine blade under an actual working condition; the high-temperature environment module is used for realizing local rapid heating of the sample; the in-situ observation system integrates a high-temperature microscope lens with a long working distance and a high-speed camera and is used for observing and recording microscopic damage evolution of the turbine blade sample in a high-temperature loading process in real time; and the control unit is internally provided with a temperature-stress decoupling control model and a microdefect identification model and is used for compensating the plastic deformation heat effect in real time and quantifying the damage factor D. Synchronous loading of centrifugal force is achieved through the three-axis servo actuator, composite stress is accurately reproduced, the load error is small, and the limitation that a traditional single-axis test cannot simulate the multi-source load of the blade is broken through. Meanwhile, plastic work-induced temperature rise interference is reduced, and the technical problem of data distortion caused by temperature drift in a high-temperature test is solved.

According to the substrate wiring packaging method, the substrate wiring packaging structure and the substrate wiring packaging carrier plate provided by the invention, the glass substrate with the surface sputtered with the heat conduction metal layer is firstly provided, then the bonding layer is formed on the heat conduction metal layer through spin coating, and then the reconfiguration wiring combination layer is formed on the bonding layer. And irradiating the heat-conducting metal layer by using white light, so that the bonding layer loses viscosity after being heated, and the glass substrate is peeled off. And then the bonding layer is removed through cleaning, and finally a single product is cut. Compared with the prior art, the heat conduction column provided by the embodiment of the invention can better realize heat conduction during irradiation, so that heat dissipation of the heat conduction metal layer is realized after the heat conduction metal layer is over-temperature, and in combination with low-temperature white light irradiation, heat is prevented from being excessively conducted to the bonding layer to generate a heat effect on the reconstructed wafer. Moreover, the heat-conducting metal layer and the glass substrate are peeled off together, so that subsequent etching removal is not needed, and the influence of an etching process on the reconstruction wiring structure is avoided.

A microclimate control system for an occupant includes a component that has a thermal effector that is configured to provide thermal conditioning to an occupant. An image capture unit is configured to receive an image of the occupant. A controller is in communication with the image capture unit, the controller includes an extractor algorithm that is configured to extract occupant personal parameters based upon the image. The controller includes a first estimator that is configured to predict an occupant clothing insulation value based upon the occupant personal parameters, and a second estimator is configured to predict occupant anthromorphic characteristics based upon the occupant personal parameters. The controller is configured to regulate the thermal effector based upon the occupant clothing insulation value and the occupant anthromorphic characteristics.

The invention discloses an ultrasonic and current-assisted bulging device and method for a metal special-shaped pipe fitting, and belongs to the field of material processing engineering. In order to solve the problems that some high-strength metal pipes are difficult to bulge, large in deformation resistance, prone to cracking and prone to local thinning, the metal pipes are heated through current, media in the metal pipes vibrate through an ultrasonic vibration system, the media in the metal pipes are pressurized through a pressure applying system, and the metal pipes are heated through the ultrasonic vibration system. By utilizing the characteristic that a medium in the metal tube is solid at room temperature and is liquid after being heated, the bulging process is completed for the metal tube. Through the current heat effect, the heating efficiency can be remarkably improved, and the forming efficiency and quality of the metal pipe are finally improved by utilizing the potential of the current in the aspect of improving the plasticity of the metal material. Ultrasonic vibration is applied to the metal pipe through the ultrasonic vibration device, the elongation and thickness uniformity of the material are effectively enhanced, and forming of the high-strength metal pipe is facilitated. The device and the method are mainly used for forming the difficult-to-deform metal pipe.

The invention relates to the technical field of rare earth permanent magnet material preparation, in particular to a method for preparing a neodymium-iron-boron magnet through ultrasonic-assisted screen printing and gradient temperature control. According to the preparation method, the nano aluminum oxide coating is prepared by adopting an ultrasonic-assisted screen printing technology, and the grain orientation degree and the microstructure uniformity are improved through the synergistic effect of an acoustic streaming effect, a heat effect and mechanical vibration energy generated by ultrasonic waves with the frequency of 20-30 kHz and the power density of 30-60 W / cm < 2 >; according to the invention, an Al-O-Si three-network structure is formed at a pre-sintering stage of 800 DEG C through nano aluminum oxide, so that the heat-resistant shrinkage stress is improved by 3 times; according to the temperature zone gradient temperature control diffusion process, the grain boundary structure is optimized, and the treatment time is shortened by more than 50%. The motor can be widely applied to new energy automobile driving motors and wind driven generators.

Disclosed in the present invention are a bionic electrothermal coupling composite material based on a pyroelectric effect, a medical kit and a use. The composite material subjected to corona poling treatment of the present invention has a surface potential of about 80 mv, the composite material can generate a pyroelectric effect by loading near-infrared light in vitro, and as can be seen from a diagram showing the variation of pyroelectric current with temperature, charge release occurs during temperature increase, thereby establishing correlation between electrical and thermal properties of a material, and realizing electrothermal effect-driven bionic coupling of the material. The synergistic effect of the piezoelectric properties and the pyroelectric effect is achieved by coupling, achieving the effects of promoting macrophage polarization and promoting tissue repair or healing. In exemplary embodiments, the charge generation capability of a material can be improved by controlling near-infrared light in vitro in a non-invasive manner, on-demand power supply based on a near-infrared light external field is realized, and the problem of insufficient long-term performance of a charged material after implanted into the body is solved.

The invention discloses a low-temperature liquid cavitation numerical prediction method considering different-scale heat effects, and belongs to the field of low-temperature liquid cavitation numerical prediction. The implementation method comprises the steps that a corresponding fluid domain geometric model is established, grids are divided, a computational fluid mechanics model is established under the macro-scale, a separation vortex DES turbulence model is adopted, a fluid volume VOF model is used for capturing a macro-scale cavity interface, and convective heat transfer correction under the macro-scale is conducted on a cavitation model; establishing a cavitation kinetic equation considering heat conduction correction under the mesoscale, solving resistance, volume force, additional mass force, pressure gradient force and lift force suffered by the mesoscale discrete cavitation by using a DBM discrete phase model, and obtaining a movement track of the discrete cavitation in a cavitation flow field; and calculating the unsteady cavitation flow by taking a steady result as an initial value to obtain a flow field characteristic under a macroscale and a discrete cavitation dynamic evolution process under a mesoscale, thereby realizing quantitative description and high-precision numerical prediction of the unsteady cavitation flow.

The invention relates to the technical field of circuit boards, in particular to an intelligent die cutting system for a flexible circuit board. The system comprises a data acquisition module used for acquiring traction data, laser heat effect data and material characteristic data of a material in a processing process; the data analysis module is used for determining the dynamic stress distribution of the material in the machining process based on the material characteristic data and according to the traction data, and determining the local expansion or contraction trend of the material based on the material characteristic data and according to the laser heat effect data; the data analysis module is further used for determining compensation parameters according to the dynamic stress distribution and the local expansion or contraction trend of the material; the laser cutting equipment is further connected with the data analysis module; and the laser cutting equipment is used for determining pulse parameters and a cutting track according to the compensation parameters and the material characteristic data, and cutting the flexible circuit board.

The present invention provides a rotating machine in which the gear housing is less susceptible to the heat effects from the housing cover. The rotating machine (30) includes: a gear housing (36) housing a large gear (34) and a small gear (35); a housing cover (42) configured to form a gap between it and the back of an impeller (41); a drive shaft (43) inserted into a hole (42a) in the housing cover (42) and connecting the impeller (41) and the small gear (35); a mounting part (51) provided on a portion of the opposing surface (37a) of the outer side of the gear housing (36) opposite to the housing cover (42), which is annular or arc-shaped with the rotation center axis of the impeller (41) as the center; and a heat insulation member (53) clamped between the mounting part (51) and the housing cover (42).

Provided is a pump device capable of suppressing deterioration of a transport fluid due to thermal effects. A pump device of the present disclosure includes: a pump configured to suck and discharge a transport fluid; a casing having an accommodation space in which the pump is accommodated; and a heat-generating component placed in the accommodation space together with the pump, and the casing includes an intake port for introducing gas for cooling the heat-generating component, into the accommodation space therethrough, and an exhaust port, located above the intake port, for discharging the gas around the heat-generating component to the outside of the casing therethrough.

The invention is applicable to the technical field of battery devices, and provides a battery device and electric equipment, the battery device comprises a shell part, and the shell part is used as an appearance part of the battery device. The shell part comprises a base body and a protective layer structure. The base body has a first outer surface facing an external environment of the battery device. The protective layer structure is arranged on the first outer surface. The protection layer structure comprises a heat insulation layer, a reflection layer and a pigment layer. The heat insulation layer is arranged on the first outer surface. The reflecting layer is arranged on the side, away from the first outer surface, of the heat insulation layer and used for reflecting infrared radiation and transmitting visible light. The pigment layer is arranged between the heat insulation layer and the reflection layer. The heat insulation layer obstructs heat transmission and reduces the influence of high temperature or low temperature of the external environment on the shell part and the interior of the shell part. The pigment layer colors the first outer surface. The reflecting layer reflects infrared light radiation to the external environment, the probability that heat radiation of infrared light is transmitted to the pigment layer is reduced, the probability that the pigment layer is decomposed due to the heat effect of the infrared light is reduced, and the color changing probability of the pigment layer is reduced.

The invention relates to the technical field of solar cell recycling and processing, in particular to an electric heating device for dismantling a module frame, which comprises a frame dismantling platform for supporting and limiting a photovoltaic panel, and further comprises at least one pair of oppositely arranged electrodes for clamping the upper side and the lower side of the frame of the photovoltaic panel; the driving unit is used for driving the electrode to execute a clamping action; and the heating control unit is used for supplying current to the clamped frame through an electrode so as to heat the clamped frame. The electrodes which are symmetrically arranged up and down are matched with the driving unit to clamp the whole frame, so that current is led in from the upper surface and the lower surface of the frame, the conductive contact area is increased, the current path is remarkably shortened, and compared with a traditional electric heating scheme, the current is uniformly distributed in the section of the frame, and the heating efficiency is improved. And the resistance heat effect can be synchronously and uniformly generated on the whole frame, so that the phenomena of local overheating and glue carbonization combustion caused by overhigh current density of an electrode contact point are avoided.

The utility model discloses ultrasonic cleaning equipment based on a Fresnel lens. The ultrasonic cleaning equipment comprises an ultrasonic generator; an ultrasonic transducer; the ultrasonic cleaning device comprises an ultrasonic transducer, a Fresnel lens and a cleaning container, the Fresnel lens is located between the output end of the ultrasonic transducer and the cleaning container, one end face of the Fresnel lens is tightly attached to an outer shell of the cleaning container, and the other end face of the Fresnel lens is tightly attached to the output end of the ultrasonic transducer; and the placing position of an object to be cleaned in the cleaning container is the focal point of the Fresnel lens. By means of the device, the sound pressure and the sound intensity of an accumulation area can be improved, the time of single-time cleaning is shortened, the energy utilization rate is improved, damage to samples caused by heat effect accumulation is avoided, and meanwhile damage to the surfaces of cleaned objects caused by uneven cavitation due to low power is avoided.

The invention relates to a local magnetothermal coupling biological rotating disc enhanced cold region sewage treatment method and system. The system comprises a reactor, a biological rotating disc for growing a biological membrane, a magnetic heat carrier, an alternating magnetic field generator and a motor for driving the biological rotating disc to rotate, the reactor comprises an air exposure area and a sewage area from top to bottom, a water inlet is formed in the lower part of the left side wall of the reactor, a water outlet flush with the water level of the sewage area is formed in the upper part of the right side wall, the reactor is further provided with vent holes, and the air exposure area is communicated with air through the vent holes; the biological rotating disc is partially immersed in the sewage area and partially exposed to the air exposure area in the radial direction; the air exposure area is located in the magnetic field action range of the alternating magnetic field generator, the magnetic heat carrier is arranged on at least one side of the biological rotating disc, and the magnetic heat carrier generates a magnetocaloric effect under the action of the magnetic field so as to increase the temperature of the biological membrane. According to the invention, the synergistic effect of precise heating of the biological membrane and the metabolic process of the biological membrane is realized, and the efficient and energy-saving sewage denitrification process at low temperature is realized.

The invention discloses a spaceflight structure strength analysis method based on a multi-physics field, which comprises the following steps: establishing a parameterized finite element model integrated with a friction heat generation effect by acquiring in-orbit temperature time sequence data and material creep characteristic parameters, and simulating inelastic strain accumulation of a structure under a thermal cycle load; a nonlinear damage model considering a creep-fatigue interaction effect is adopted to calculate an accumulated damage degree, an effective stiffness matrix is constructed to deduce a structure inherent frequency drift distance and a shape retention capability parameter, and finally, through a safety margin evaluation algorithm, the effective strength of a material and the maximum equivalent stress of the structure are dynamically compared, so that the performance of the material is evaluated. And accurate prediction of quantitative residual strength and safe service life is realized. According to the method, the technical problems that the local thermal coupling effect is not depicted enough and the creep fatigue nonlinear interaction effect is ignored are solved, and the precision and reliability of on-orbit performance degradation prediction of the spaceflight flexible structure are remarkably improved.

The invention provides a thermal resistance model construction method of an LDMOS (Laterally Diffused Metal Oxide Semiconductor) device, which is characterized in that a plurality of N-type doped isolation layers are formed on a substrate, an LDMOS structure is formed on each N-type doped isolation layer, all LDMOS structures are divided into different test groups according to different key sizes, and the key sizes at least comprise a total channel width and a cross index; measuring the thermal resistance of the LDMOS structure in each test group so as to respectively extract a thermal resistance value array of each group, and performing data fitting on the thermal resistance value array of each group so as to obtain a thermal resistance model of the relationship between the thermal resistance value of the LDMOS structure and the critical dimension; according to the method, the thermal resistance model of the full-size LDMOS device can be constructed by only utilizing a limited number of LDMOS structures in a primary tape, so that the thermal resistance of the LDMOS devices with different sizes can be predicted, the self-heating effect of the device can be accurately evaluated in the design stage, the device design is optimized, the development cost of the device is reduced, and the research and development period is shortened.

The utility model discloses a turnover embracing column support for accurate positioning and installation of a large-span orthogonal steel truss, which comprises a steel column, an annular steel column hoop is connected with the steel column through high-strength bolts, a triangular steel platform is welded with the annular steel column hoop, steel column brackets are arranged on two sides of the steel column, and the triangular steel platform is connected with the annular steel column hoop through high-strength bolts. The steel column bracket is used for being welded with a large-span orthogonal truss steel beam; steel column hoops are arranged on supports on the two sides of a large-span steel structure, a tripod steel platform is hinged to steel columns, and the tripod steel platform serves as a supporting point of the large-span steel truss and serves as a horse stool for welding a vertical component bracket and the large-span steel truss, so that a welder is helped to keep a welding piece at the correct position and angle, and the welding efficiency is improved. In the welding process of the large-span steel truss, the split heads can prevent a welding piece from displacing due to the influence of gravity or welding heat in the welding process, meanwhile, uniform supporting force can be provided, thermal deformation in the welding process can be reduced, the original shape and size of a steel structure can be kept, and therefore the welding precision and quality are guaranteed.

The application discloses a production line fault checking method based on a regional attention learning mechanism, relates to the technical field of production line fault checking, and synchronously collects low-frequency vibration, high-frequency acoustic emission and temperature time sequence signals, covers multidimensional fault characteristics such as mechanical wear, shaft misalignment and thermal effect abnormality, and solves the problem that traditional single signal detection is not complete. According to different signal characteristics, key abnormal characteristics are focused, redundant noise is filtered, and the effectiveness of the characteristics is improved. A collaborative degradation factor model is constructed based on health history data, the weight coefficient is dynamically adjusted through maintenance post-down rate feedback, the device working condition change is adapted, and the poor adaptability of the static model is avoided. The maintenance effect (collaborative degradation factor down rate) is quantitatively evaluated, accurate maintenance is guided, invalid maintenance is reduced, and the production line operation and maintenance efficiency is improved.

The present application relates to the technical field of micro-nano functional materials, and particularly relates to a high-efficiency light-heat conversion and wear-resistant super-hydrophobic coating, a preparation method thereof and an application thereof in ice prevention and removal, the preparation method adopts ammonium persulfate as an oxidant to initiate polymerization of pyrrole on the surface of halloysite nanotubes to generate polypyrrole, so as to obtain a halloysite nanotube composite material wrapped by polypyrrole. The super-hydrophobic coating is obtained by mixing the composite material with low-surface-energy polydimethylsiloxane, and the coating layer formed by the super-hydrophobic coating has the characteristics of high roughness and low surface energy, and thus has excellent hydrophobic performance. The coating layer also has good light-heat effect, flexibility, elasticity, mechanical performance, high-temperature resistance and durability. In addition, by adding hydrophobic nano-SiO2, the super-hydrophobic performance of the coating layer is further improved, and the hardness and wear resistance of the coating layer are also enhanced. Finally, the coating layer has excellent light absorption capacity and light-heat conversion efficiency, and realizes the performance of efficient protection and ice layer removal in the application of ice prevention and removal.