886 results about "Heat effect" patented technology

The invention relates to the field of abrasion morphology determination and abrasion loss calculation, and discloses an abrasion morphology and contact stress analysis and prediction method and system based on a rough contact surface, a medium and equipment, and the method comprises the steps: constructing a dynamic contact model, and obtaining an accurate movement rule and a stress analysis result of a moving mechanical component; constructing a three-dimensional rough surface digital twinborn model conforming to an actual contact surface; establishing a contact stress field multi-physical field analysis model to obtain elastic deformation and a friction heat effect; based on the contact stress distribution and the local wear rate which are obtained in real time, carrying out dynamic reconstruction on the wear morphology, and establishing a nonlinear iteration relation between the wear loss and the contact stress distribution; determining an accurate boundary condition based on an accurate movement rule and a stress analysis result of the moving mechanical component, and constructing a failure criterion based on contact stress gradient mutation and surface roughness evolution; key parameters are calibrated through experiments, and a mapping relation database of wear rate-stress state-morphological characteristics is established so as to carry out friction wear analysis.

The invention relates to the technical field of connector monitoring, in particular to a method and a system for monitoring faults of a connector in real time. The method comprises the following steps: acquiring object data of a connector, acquiring operating environment parameters including temperature, humidity, current, voltage and vibration conditions, and comprehensively evaluating the operating state of the connector; the mechanical toughness deterioration trend of the connector is detected, the gradual change failure condition of the contact interface is further analyzed, and the dynamic power attenuation degree of the connector is predicted; analyzing an internal component loss condition caused by the heat effect, and detecting a fatigue aggravation condition in the connector; and the aging trend of the assembly is evaluated according to the fatigue aggravation degree, the overall stability degradation degree of the connector is further evaluated, accurate monitoring of the connector fault is finally realized, and connector fault data is obtained. According to the invention, the connector fault identification is optimized, so that the connector fault identification is more accurate.

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 an HDI micro blind hole laser drilling processing method and system, and relates to the field of HDI drilling processing, CO2 laser drilling is firstly carried out on a plate, then UV laser shaping is carried out, finally quality detection is carried out, and the core is that a plurality of local datum points distributed in a matrix mode are preset on the HDI plate to be processed. In the CO2 laser drilling process, the drilling task and the positioning action of the local datum point are executed alternately through a control program. By periodically measuring the actual position of the adjacent local datum point in the machining period, the dynamic position offset generated in the area due to the heat effect can be captured in real time, and the machining coordinates of the follow-up target drilling point in the area can be corrected in real time through the offset. The continuous local dynamic compensation effectively overcomes the dynamic thermally induced deformation problem which cannot be handled by the traditional single global correction, so that the drilling precision in the large-size and high-density machining process is ensured.

The invention relates to the technical field of graphene, and discloses a deep skin anti-wrinkle beauty instrument applying a graphene electrothermal effect and a control method, the method comprises the following steps: pre-activating a graphene electrothermal film to obtain a negative temperature coefficient resistance characteristic parameter; performing contact state detection and multi-parameter analysis on the target area to obtain personalized temperature control parameters; pWM sectional power control is carried out on the graphene electrothermal film based on the personalized temperature control parameters and the negative temperature coefficient resistance characteristic parameters, and a staged heating temperature output strategy is obtained; real-time feedback adjustment is carried out based on a staged heating temperature output strategy, and a stable temperature control signal is obtained; the graphene electrothermal film is subjected to gradual cooling power adjustment according to the stable temperature control signal, meanwhile, the safe stop state of the beauty instrument is confirmed, the unique characteristic that the resistance value is reduced when the temperature of the graphene material rises is utilized, and compared with a traditional linear resistance material, the temperature control precision and the response speed are higher.

The invention relates to the technical field of numerical control machining, in particular to an automatic input system and method for geometric parameters of a numerical control tool. The method comprises the following steps of obtaining point cloud data and material characteristics of a tool, removing abnormal points to clean the data, extracting the edge contour of the tool, performing geometric parameter mapping through the edge contour, determining geometric characteristics of the tool, reconstructing a tool framework, obtaining a numerical control machining task, and performing cutting load simulation on the reconstructed tool. Analyzing the initial wear data, performing heat effect prediction based on cutting load, calculating the thermal deformation degree of the cutter, performing deformation compensation on the initial wear data, generating geometric deformation data, drawing a deformation-time curve, performing time sequence tracking parameter compensation according to the change process of the cutter, and realizing real-time recording and updating. According to the method, the management efficiency and the machining precision of the numerical control tool are integrally improved, and the stability and predictability of the production process are enhanced.

The invention belongs to the field of magnetic refrigeration materials, and particularly discloses a gadolinium-based molybdate magnetic refrigeration material and a preparation method and application thereof. The gadolinium-based molybdate magnetic refrigeration material comprises GdXMoO4, wherein X is F, Cl, Br or I; the magnetic phase change temperature of the gadolinium-based molybdate magnetic refrigeration material is less than 2K, and the maximum magnetic entropy change of the gadolinium-based molybdate magnetic refrigeration material is greater than or equal to 12J. Kg <-1 >. K <-1 > when the magnetic field change is 0-50kOe. The gadolinium-based molybdate magnetic refrigeration material disclosed by the invention has extremely low magnetic phase transition temperature, has relatively high magnetocaloric efficiency in a low magnetic field, is an extremely low temperature region magnetic refrigeration material with excellent performance, and has a wide application prospect in the field of extremely low temperature magnetic refrigeration.

The invention provides a photo-thermal super-hydrophobic energy storage material, a preparation method thereof and application of the photo-thermal super-hydrophobic energy storage material in anti-icing and deicing, and belongs to the technical field of anti-icing and deicing. The photo-thermal super-hydrophobic energy storage material provided by the invention comprises an energy storage coating and a photo-thermal super-hydrophobic layer which are sequentially arranged from bottom to top, the energy storage coating comprises the following components: first resin and phase change energy storage microcapsules distributed in the first resin; the components of the photo-thermal super-hydrophobic layer comprise second resin and a photo-thermal inorganic material distributed in the second resin; the surface of the photo-thermal super-hydrophobic layer is provided with a micro-nano structure. Efficient anti-icing / deicing is achieved through the synergistic effect of the photothermal effect, the energy storage characteristic and the super-hydrophobicity, and the result of the embodiment shows that the anti-icing duration of the coating prepared through the method reaches 1.5 times that of a traditional super-hydrophobic surface. Meanwhile, under the illumination condition, the temperature of the coating can be increased to about 50 DEG C within 2000 s, and ice can rapidly fall off from the surface of the coating.

The invention relates to a Raman nondestructive testing system for cultural heritage based on a cooling device. Comprising a vacuum chamber, and the vacuum chamber is used for placing a sample and receiving Raman scattering signals generated by the light inlet module penetrating through the vacuum chamber, irradiating the surface of the cultural relic sample and exciting the sample; the cooling device module is connected with the vacuum chamber and is used for efficiently cooling the vacuum chamber and preventing the cultural relic sample from being damaged by a laser heat effect; the control and data processing module is used for monitoring and adjusting the laser power, the chamber pressure and the temperature of the sample table in real time, analyzing the collected Raman spectrum data and outputting a detection result; the laser energy density at the sample can be effectively reduced, and the cultural relic sample is prevented from being damaged due to strong light focusing irradiation; meanwhile, efficient collection of Raman signals in a large light spot range is achieved through the beam expander and the signal collection module, and the problem that the signal strength is weakened is solved.

The invention discloses a 3D printing path optimization method for a multi-joint industrial robot, and relates to the field of 3D printing path optimization. The method comprises the steps that a normalized torque load index is generated according to the joint torque of the mechanical arm, and a layer cutting thickness sequence is generated in combination with the model surface curvature; a vibration risk index is constructed through the joint angular acceleration, the attitude interpolation weight is dynamically adjusted, and an attitude interpolation trajectory is generated; according to the distribution characteristics of the temperature field around the path point, calculating a thermal coupling factor, generating a thermal avoidance path offset, and correcting the path point; calculating a collision risk score based on the minimum Euclidean distance between the path point and the obstacle model; and fusing the cutting layer thickness, the vibration risk, the thermal coupling factor and the collision risk score, and constructing a global path scoring function. Through comprehensive consideration of mechanical arm load, vibration risk, heat accumulation and collision risk, printing precision and quality are effectively improved, path smoothness is optimized, vibration and heat influences are reduced, material deformation is avoided, and stability of the printing process is ensured.

The invention discloses an ultraviolet laser enhanced plasma electrolytic polishing method for an aluminum-based silicon carbide composite material, which is characterized in that the conductive performance of a reinforced phase SiC material is locally improved by utilizing the synergistic effect of the local thermal effect and the photoelectric effect of ultraviolet laser, and meanwhile, uniform-speed polishing of a metal aluminum matrix and the reinforced phase SiC material is achieved by virtue of plasma discharge. And the machining efficiency is obviously improved, a machined surface with higher quality compared with traditional machining and single plasma electrolytic polishing is obtained, and further application and popularization of the aluminum-based silicon carbide composite material are facilitated.

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 relates to the technical field of chip etching, in particular to a high-precision etching method and device for the surface of a photoelectric chip. The method comprises the following steps: determining a laser response relation value according to line characteristics of an etching contour corresponding to angular points in an etching path of a laser beam in the surface etching process of the photoelectric chip, angle changes between different angular points and a response relation between energy scattering rates; determining a scanning oscillation risk value at the angular point position according to the attenuation condition of the etching scanning speed of the laser beam; dynamic errors are introduced based on the scanning oscillation risk values, and the heat loss probability of the laser beam characteristics is determined; determining adjustment coefficients for etching to different angular points by combining the laser response relation value and the heat loss probability; and adjusting the etching scanning speed of the laser equipment in real time by adjusting the coefficient. By dynamically adjusting the etching scanning speed of the laser beam, the balance between the heat effect and the processing quality is accurately controlled, and the consistency of the processing efficiency and the path shape is considered.

The control device comprises a control module, an ice melting power supply module, a boundary switch, a short circuit switch and an ice melting switch, the boundary switch, the short circuit switch, the ice melting switch and a protection switch are arranged on a high-voltage cable, and the control module sequentially drives the boundary switch, the short circuit switch, the ice melting switch and the protection switch to execute state switching through action instructions. The conduction control of the ice melting loop is realized; the control module integrates a finite element algorithm function, collects current, voltage and temperature distribution parameters in an ice melting loop in real time, and dynamically corrects ice melting current parameters through three-dimensional electromagnetic-thermal coupling field simulation; setting a parametric modeling unit, and calculating an optimal voltage regulation gear based on a heat balance equation and a Joule heat effect to realize adaptive voltage regulation; the demarcation switch, the short circuit switch and the ice melting switch are arranged, the effect of cable short circuit heating ice melting is achieved by sequentially controlling the on-off states of all the switches, finite element real-time simulation and parameterization voltage regulation decision are combined, and the cable ice melting efficiency, reliability and safety are remarkably improved.

The invention relates to a light / heat / magnetic detachable high-strength polyurethane adhesive as well as a preparation method and application thereof. The light / heat / magnetic detachable high-strength polyurethane adhesive comprises a polyurethane adhesive and a functional filler. According to the light / heat / magnetic detachable high-strength polyurethane adhesive prepared by the preparation method disclosed by the invention, the colloid is black, and the adhesive has excellent light absorption performance and can realize rapid separation of an adhesive interface under infrared irradiation through a heat effect; meanwhile, the ferroferric oxide can be vibrated and heated under the action of an external magnetic field due to the magnetic response characteristic of the ferroferric oxide, so that fracture and separation of the adhesive layer are promoted. By means of the technology, efficient and reversible disassembly of parts bonded through the hot melt adhesive is achieved, possibility is provided for recycling and reusing of bonding materials and devices, and the problem that traditional polyurethane hot melt adhesive cannot be recycled is solved.

The invention discloses a Cu2WS4-CuBi2O4 composite material with a photothermal effect and a preparation method and application thereof.The Cu2WS4-CuBi2O4 composite material is supported by CuBi2O4 of a rod-shaped structure, flaky Cu2WS4 is loaded on the surface of the rod-shaped CuBi2O4 through the interface regulation and control effect of a surfactant by adopting a hydrothermal method, and a Z-type heterojunction with the photothermal effect is formed; in an antibiotic degradation system, the Cu2WS4-CuBi2O4 composite material shows good photocatalytic performance and degradation effect under the synergistic effect of a photothermal effect and a PDS advanced oxidation process. The device is simple to prepare, stable in structure, high in repeatability and free of secondary pollution, and can meet laboratory and industrial requirements.

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%.

According to the chip resistor and the preparation method thereof, the laser wire cutting grooves adjacent to the left electrode and the right electrode are formed in the resistance layer through laser cutting, the resistance value of the resistor can be accurately adjusted and controlled, the manufacturing precision and consistency of the resistor are improved, the laser cutting mode is optimized through diagonal cutting, and the production efficiency is improved. The laser wire cutting groove is limited at the diagonal position and is adjacent to the front electrode, and the heat effect of the resistor is correspondingly controlled, so that the heat dissipation performance is improved; according to the chip resistor, through a multi-layer protection structure formed by the first protection layer made of the glass material and the second protection layer made of the epoxy resin material, the invasion of moisture, chemical corrosion and mechanical damage is effectively prevented, the service life of the resistor in a severe environment is remarkably prolonged, and particularly, through the third protection layer made of the resin silver material, the service life of the resistor is prolonged. The anti-corrosion performance of the electrode part is enhanced, so that the resistor can keep stable electrical performance during long-time work.

To provide a bed structure, a heat source, a magnetic refrigeration apparatus with improved performance, and a method for manufacturing the bed structure.SOLUTION: A bed structure (10) is used in a magnetic refrigeration apparatus and equipped with a plurality of particles (11). The particles (11) have a magnetocaloric effect. Flow channels (14) through which fluid passes are formed between the particles (11). The bed structure (10) has a structure in which thermal conduction between the particles (11) is suppressed. The heat source comprises an application part which applies a magnetic field to the bed structure and particles. The heat source has a plurality of kinds of particles with different magnetocaloric effects. The magnetic refrigeration apparatus is equipped with a heat source and a moving part which moves fluid performing heat exchange with the particles.SELECTED DRAWING: Figure 1

The invention provides a laser marking system and method for metal surface dazzling and coloring, and relates to the technical field of metal surface laser precision machining.The system integrates a femtosecond laser, a nanosecond laser, an optical bread board, a lifting platform, an electric rotating slide, a scanning galvanometer, a focusing lens, a computer control system and an adsorption platform; two laser marking processes of colorful marking and coloring marking are innovatively combined; the femtosecond laser device achieves a colorful effect on the metal surface through ultrashort pulses, and the nanosecond laser device generates a colorful effect of various colors through the heat effect. Automatic switching of the two lasers is controlled through the lifting platform, the computer automatically recognizes the drawing and document process type, and multi-color-zone pattern marking is efficiently completed. The system is simple in structure and convenient to operate, can meet the high-precision double-process marking requirement of the metal surface, and is widely applied to the fields of consumer electronics, anti-counterfeiting technologies and the like.

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 discloses a high-voltage switch equipment fault prediction method and system, and relates to the technical field of high-voltage switch monitoring, and the method comprises the steps: extracting key operation parameters of high-voltage switch equipment during high-load operation, and building a heat effect dynamic model through combining the structure information of the equipment, comprising a working condition classification unit, a heat conduction heat dissipation unit and a load-temperature coupling unit, key operation parameters are collected in real time and input into a heat effect dynamic model, a load-temperature change curve is generated, fault features are extracted, high-load operation fault prediction is carried out, and scientific decision response is provided by quantifying risk levels. According to the method and the device, the technical problems of inaccurate fault prediction and low equipment operation reliability caused by the fact that the existing high-voltage switch equipment fault prediction cannot dynamically reflect the heat effect change under high-load operation are solved, and the technical effect of improving the fault prediction accuracy and the operation reliability of the high-voltage switch equipment under the high-load operation condition is achieved.

The invention discloses a radio frequency chip heat effect compensation system and method based on multi-physics field coupling, the system comprises a radio frequency chip body, a multi-physics field coupling calculation module, a temperature sensor array and a dynamic compensation algorithm module, and the method comprises the following steps: evaluating frequency deviation caused by a heat effect; collecting multi-point temperature data and converting the multi-point temperature data into frequency drift data; regional temperature regulation and control are executed through a temperature control array, and frequency drift is eliminated. The compensation effect is evaluated in real time, and compensation parameters are dynamically optimized. According to the invention, predictive compensation of frequency drift is realized, the compensation precision is improved by 2-3 times, and the response speed is improved by 5-10 times; the system has self-adaption and self-learning capabilities and can adapt to rapid temperature change as high as 0.5 DEG C / s, and the technical breakthrough that the system is more and more accurate is realized; while the performance is greatly improved, the frequency stability reaches 10 <-8 > magnitude, the phase noise is reduced by 12 dBc / Hz, the power is saved by more than 80%, the area is increased by less than 2 mm < 2 >, and the technical contradiction of high performance and inevitable high power consumption is 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 provides an MOF-based derivative composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalysts. The MOF is quenched in the soluble metal salt solution after being calcined, the MOF derivative material formed through calcination can be rapidly cooled through quenching, a large number of defects are formed on the surface of the MOF derivative material, on one hand, the number of oxygen vacancies can be increased through the defects, and the oxygen vacancies are beneficial to electron transmission and improvement of the catalytic effect; on the other hand, the metal loading capacity can be improved, the binding force between the MOF derivative material and the metal is high, the MOF derivative material is not prone to falling off, and the photocatalyst has good stability. According to the method, metal ions can be promoted to be reduced to form metal simple substances or metal clusters through reduction treatment, and the metals can generate heat when being used as the photocatalyst, so that oxygen vacancies and the metals generate light-heat effect for concerted catalysis, and the degradation effect of the photocatalyst on antibiotics is further improved.

The invention discloses application of potassium-based rare earth fluoride in magnetic refrigeration and a magnetic refrigeration device, and belongs to the field of magnetic functional materials. The series of magnetic card materials are single-phase potassium-based gadolinium fluoride, and the chemical formula is KGdF4. The series of magnetic card materials can obtain a large magnetocaloric effect under a low driving magnetic field, and a 0-5kOe, 0-10kOe or 0-20kOe variable magnetic field is applied to the series of magnetic card materials. Under a magnetic field of 0-20 kOe, isothermal magnetic entropy changes of 29.18 J * kg <-1 > * K <-1 >, 27.92 J * kg <-1 > * K <-1 > and 31.99 J * kg <-1 > * K <-1 > are obtained at the temperature of 2K. When the cubic phase KGdF4 does not have an external magnetic field, the specific heat peak value at a low-temperature 2K position reaches 19.20 J * kg <-1 > * K <-1 >; and when the external magnetic field is increased to 2T, the low-temperature specific heat peak value reaches 72.15 J * kg <-1 > * K <-1 >.

The invention discloses a micro-motion control device for online compensation of optical axis offset, which comprises an optical end mechanism and a base, a plurality of micro-motion driving rods are connected in parallel between the optical end mechanism and the base, a plurality of micro-displacement sensors are arranged on one side of the optical end mechanism, and the optical end mechanism comprises a mirror frame. According to the invention, the optical tail end mechanism, the micro-motion driving rods and the micro-displacement sensor are arranged and are matched with one another, and the lengths of the six micro-motion driving rods are respectively adjusted, so that the lens can be driven to realize any posture on six degrees of freedom in a small range, and meanwhile, measured data can be compensated in real time through feedback closed-loop control; the infrared imaging system has the advantages that the control precision is improved, the optical axis deviation of the infrared imaging system caused by the heat effect can be compensated, the optical lens can be controlled in a closed-loop manner by arranging the measuring element and the feedback ring, the control precision of the whole equipment is high, the stability can be kept in a complex mechanical environment, and the imaging quality of the system is ensured.