5013 results about "Thermal source" patented technology

The invention relates to the technical field of electrical digital data processing, and discloses a train ice melting simulation optimization method of an electromagnetic thermal coupling model fused with a deep learning method, which comprises the following steps of: inputting a geometric representation tensor and a physical working condition parameter vector containing an electromagnetic excitation frequency and a reference environment temperature into a feature mapping neural network; outputting a dual-channel space source item tensor containing basic heat source power density and a heat source to temperature change sensitivity distribution matrix through nonlinear convolution operation; constructing a heat conduction discrete numerical value evolution operator configured with an active item linear correction interface; time stepping operation is executed according to the heat conduction time scale, a basic heat source is corrected in real time through the Hadamard product of a sensitivity distribution matrix and temperature deviation, and an operator is substituted for solution. On the premise that electromagnetic-thermal nonlinear coupling characteristics are reserved, decoupling of the time scale is achieved, and the calculation efficiency in high-frequency physical field simulation is effectively improved.

The invention relates to the technical field of process optimization, in particular to a collaborative optimization analysis method for multi-station tower drum welding. In order to solve the problem that cooperative control of tower drum multi-station welding is difficult, firstly, multi-mode sensing data of welding seam vision, arc sensing, thermal field distribution and welding voiceprint are loaded, a fusion evaluation model is constructed to obtain a welding seam deviation value and a sensor confidence score, and the health state of a sensor is judged according to a threshold value; and a corresponding fault-tolerant reconstruction control mode is triggered to obtain welding tracking control parameters, then a multi-station welding heat source model is loaded, thermal interference is decoupled in combination with the control parameters and thermal field data, multiple stations are cooperatively regulated and controlled, a cooperative control instruction is output and executed, and welding process optimization is achieved.

The invention relates to the technical field of precision manufacturing, and discloses a high-precision numerical control machine tool thermal error compensation method and system.The method comprises the steps that temperature data of key parts of a machine tool are collected in real time through a sensor array, and temperature distribution is generated through preprocessing; simulating a heat propagation path based on finite element analysis to obtain thermal deformation distribution; quantizing contribution values of multiple heat sources to cutter position offset by adopting a neural network model; when the contribution value exceeds a threshold value, activating a cooling system compensation mechanism to generate an offset correction amount; the correction is fused into a machine tool control system to optimize a tool path, and the thermal error model is dynamically updated based on the deviation between the actual machining position and the predicted deformation; and finally, a self-adaptive control strategy is generated in combination with the working condition parameters and the heat source contribution value, and accurate control over thermal errors is achieved through real-time feedback circulation. The method can solve the problem of low machine tool thermal error control precision in the prior art.

The invention relates to an energy-saving control strategy for a medical building air-conditioning ventilation system based on climate change characteristics and load prediction. The energy-saving control strategy comprises the following steps of: acquiring all original data by utilizing various sensors, actuators and the like of a sensing layer; calculating, optimizing and deciding on an intelligent control layer (including building comprehensive cooling and heating load prediction, clean operation department area cooling and heating demand calculation, dynamic water supply temperature optimization, a particle swarm optimization (PSO) algorithm for domain optimization, constraint check and other algorithm modules) on a central management server; and an optimization result is issued to the execution layer and the executed equipment layer, so that energy-saving control is finally realized. The method overcomes the defects that the existing hospital building load prediction technology mostly adopts a macroscopic and rough prediction model, and the global optimization particle swarm optimization algorithm is slow in convergence and long in solving time when coping with a large medical building adopting multiple types of cold and heat source equipment. The device is suitable for large-scale hospital projects in hot-summer and warm-winter areas.

The invention belongs to the technical field of additive manufacturing, and particularly relates to a strong electromagnetic pulse-ultrasonic auxiliary electric arc additive manufacturing platform. The platform body is provided with an upper substrate used for providing an initial plane for electric arc additive manufacturing; the water cooling device comprises a water cooling box used for containing cooling water, and the substrate is contained in the water cooling box; the base plate locking clamp comprises a positioning clamping table and a clamping device. The positioning clamping table and the clamping device are arranged on the two sides of the upper base plate and matched to form a fixing structure for fixing the relative positions of the upper base plate and the platform body. The welding gun head is connected with the six-axis mechanical arm and is used for carrying out additive manufacturing on the upper substrate; the clamping device and the welding gun head are arranged on the two opposite sides of the upper base plate in a spaced mode. And the clamping device is partially arranged outside the water cooling box. The clamping device and the welding gun head are arranged on the two sides of the water cooling box respectively, space interference between the clamping device and the welding gun head in the working process can be effectively avoided, meanwhile, a principle heat source of the clamping device can be guaranteed, and normal work of the clamping device is guaranteed.

The invention discloses a synchronous reluctance motor magnetothermal coupling rapid calculation method based on a dynamic thermal network, and belongs to the technical field of motors. Comprising the following steps: calculating motor loss by adopting a finite element electromagnetic field model, and calculating a convective heat transfer coefficient by adopting a finite element fluid field model; constructing a three-dimensional thermal network comprising conduction, contact, convection thermal resistance, thermal capacity and a heat source, and solving to obtain an average temperature and a boundary temperature of component nodes; constructing a sub-domain temperature field calculation model of the heat source component, and calculating temperature distribution in combination with boundary conditions; introducing average temperature compensation thermal resistance and carrying out dynamic correction; carrying out magnetothermal coupling iteration, and updating the loss and the temperature until the precision is met; and introducing maximum temperature compensation thermal resistance into the thermal network, and solving to obtain an average temperature and a maximum temperature transient temperature rise curve of each component. Based on the technical means of combining electromagnetic field and fluid field finite element simulation with thermal network and subdomain temperature field calculation, efficient calculation of magnetothermal coupling of the synchronous reluctance motor is achieved.

The invention relates to the technical field of radiator monitoring, and particularly discloses a radiator heat dissipation performance dynamic test system, which is characterized in that a heat source simulation body is arranged on a heat transfer interface of a radiator, and a high-fidelity dynamic electric power load is applied to the heat source simulation body to simulate an actual working condition; radiating a microwave detection signal to a space where the heat source simulator is located and receiving a multi-path scattering response signal; the three-dimensional dielectric constant dynamic distribution of the heat source simulation body is reconstructed by solving the inverse scattering problem fused with the space-time constraint; according to the material dielectric constant-temperature relation mapping, three-dimensional temperature field dynamic distribution is generated; and finally, intelligently identifying and extracting a migration track and a temperature change curve of the highest temperature point in the space from the continuous time sequence temperature field data, and taking the migration track and the temperature change curve as a direct evaluation basis for the dynamic heat dissipation performance of the radiator. According to the method, lossless, full-field, real-time visualization and quantitative analysis of the migration process of the dynamic hot spots in the hidden heat source are realized, and the authenticity of the dynamic heat test is improved.

The invention relates to the field of flow-state solidified soil, and discloses flow-state solidified soil prepared from construction waste, preparation equipment and a preparation method. The pre-dehydration module is used for controlling the water content of discharged materials to be less than or equal to 14%; the system further comprises a main drying system, an auxiliary material adding device, a water adding device and mixing equipment. The main drying system comprises a high-temperature drying area, a high-temperature buffering area and a heat preservation discharging area which are arranged in the vertical direction, materials treated by the pre-dehydration module are lifted into the high-temperature drying area through lifting equipment, the main drying system comprises at least two sets of material conveying belts, and a plurality of hot air openings are evenly formed in the top of the high-temperature drying area; an inlet of the hot air pipe is communicated with an air cavity heated by a heat source; a recovery channel communicating with the portion, close to the bottom, of the heat preservation discharging area is arranged on one side of the main drying system, and an obliquely-arranged dust baffle is arranged in the recovery channel. According to the invention, the problems of fluctuation of construction waste sources and large change of material moisture content in the prior art are solved.

The invention discloses a novel induction-type magneto-thermo-acoustic detection method for the conductivity of a supercapacitor, and relates to the technical field of nondestructive material detection.The method comprises the steps that a steady-state static magnetic field and a pulse alternating magnetic field are introduced to form a composite excitation field, and a magneto-acoustic effect and a thermo-acoustic effect are simultaneously and cooperatively excited in a solid-state electrode material; the magnetoacoustic-thermoacoustic coupling effect is formed, eddy current induced by a pulse alternating magnetic field in the material not only generates joule heat, but also generates a direct carrier of Lorentz force under the action of a steady-state static magnetic field, the two physical effects are derived from the same electromagnetic excitation process, but the mechanisms for generating acoustic signals are complementary to each other, so that the effect of the magnetoacoustic-thermoacoustic coupling is achieved. The two effects are coupled as a unified sound source item, a sound pressure wave equation is established, the equation describes a sound field excitation process under the combined action of a force source and a heat source, the coupling mechanism remarkably enhances the strength and information abundance of ultrasonic signals, and the inherent defect that a single thermoacoustic detection method is insensitive to a high-conductivity material is overcome.

The utility model provides a peak-shaving steam supply system for deep waste heat utilization of a thermoelectric unit, which deeply recovers cold end waste heat and flue gas waste heat of a cogeneration unit, is coupled with a two-stage compression heat pump, extracts waste heat to heat demineralized water, and serves as a primary heat source for supplying industrial steam, so that the waste heat participates in external heat supply; the superheater utilizes the generating capacity of the unit to enable industrial steam to reach steam supply parameters, the waste heat of the unit and the generating capacity are combined for external steam supply, the circulating heat efficiency is improved, the steam supply capacity is improved, meanwhile, the on-grid electricity is reduced, thermoelectric decoupling is achieved, the unit adjusting operation interval is expanded, the operation cost and pollutant emission are reduced, and peak regulation or spot transaction earnings are improved. And a clean, low-carbon, flexible, efficient, economical and energy-saving combined heat and power generation system is constructed.

The invention discloses an automatic identification method for hot spot defects of a photovoltaic module based on thermal infrared imaging, relates to the technical field of defect identification, and aims to improve the environmental adaptation precision and the multi-frequency thermal wave penetration coverage dimension in the detection process of the hot spot defects of the photovoltaic module, realize efficient and accurate multi-frequency excitation parameter configuration and environmental thermal noise suppression and improve the detection accuracy of the hot spot defects of the photovoltaic module. The defect identification accuracy and the fault diagnosis reliability level in the operation and maintenance process of the photovoltaic module are remarkably improved, the situation that response of fixed excitation parameter setting to actual thermophysical property changes is insufficient is effectively prevented, depth deviation and defect misjudgment caused by experience judgment are avoided, the pertinence and defect identification effect of final heat source distribution field reconstruction are effectively improved, and the method is suitable for large-scale popularization and application. And determining the packaging layer to which the defect influencing the performance of the photovoltaic module belongs, and ensuring that the defect layering identification measure is highly matched with the actual heat source depth distribution risk.

The embodiment of the invention provides a thermal power plant waste heat gradient utilization management method and system, belongs to the field of energy and power engineering, and aims at solving the problems that in the prior art, waste heat gradient matching is unreasonable, the low-temperature waste heat recovery efficiency is low, and the system integration degree is insufficient. The method comprises the following steps: constructing a multi-physics field coupling digital twinborn model and performing real-time correction; establishing a dynamic matching matrix of the residual heat source and the heat consumption load based on balance analysis; solving a Pareto optimal operation scheme through a multi-objective optimization model; and generating and issuing a cooperative control instruction. The system comprises a panoramic data sensing module, a digital twin modeling module, a balance and optimization decision module and a cooperative control instruction generation module. Through global optimization and dynamic regulation and control, the waste heat utilization efficiency, the economical efficiency and the equipment reliability are remarkably improved.

The invention discloses an energy storage battery thermal diffusion modeling method based on P2D-solid heat transfer coupling, and relates to the technical field of energy storage battery thermal management. The method comprises the following steps: constructing a pseudo two-dimensional (P2D) electrochemical model and a three-dimensional heat conduction model of a single battery, and calculating lithium ion concentration, potential and corresponding heat source distribution; mapping the obtained heat source as a volume heat source to a thermal model and realizing bidirectional feedback; setting a thermal runaway triggering condition to simulate temperature rise abrupt change; battery SOH state modeling is introduced, and the aging process is dynamically corrected and reflected through material parameters; finally, time domain simulation is carried out, and temperature field evolution and safety behavior prediction in the whole life cycle are obtained. According to the method, the coupling process of the microelectrochemical reaction and the macroscopic temperature change of the battery can be captured at the same time, the thermal diffusion characteristics of different decline stages are accurately described, and visual modeling of thermal runaway behaviors is supported. The method has the remarkable advantages of high precision, high applicability, perfect safety assessment capability and the like.

The invention provides a liquid cooling plate flow channel design optimization method and device based on topological optimization and a liquid cooling plate, and relates to the technical field of thermal management, and the method comprises the steps: S1, determining the geometric parameters of the liquid cooling plate according to the size of a battery module, constructing a double-layer two-dimensional design domain, and setting material, heat source and boundary conditions; s2, a topological optimization algorithm is adopted, material distribution is represented with a relative density variable, a multi-objective function giving consideration to the maximum heat exchange amount and the minimum pressure drop is constructed, a clear fluid-solid interface is obtained through density filtering and a projection function, and a target double-layer two-dimensional flow channel contour is obtained through iterative solution under volume fraction constraint; and S3, taking the target double-layer two-dimensional flow channel contour as a cross section to carry out spatial stretching bending deformation, and generating a double-layer special-shaped flow channel structure with a diffusion layer and a collection layer. According to the method, global optimization of two-dimensional topological optimization and three-dimensional geometric reconstruction are fused, the contradiction between the heat dissipation performance and the flow resistance is effectively solved, and a high-performance heat dissipation solution is provided for battery thermal management.

The invention belongs to the field of power equipment boxes, and particularly relates to a power equipment box with an efficient heat dissipation function, and the power equipment box comprises a power equipment box body, a metal column, a communication pipeline, a mounting plate, a communication assembly, a control assembly and a water-cooling radiator, and the control assembly comprises a controller, a mounting sleeve plate and a temperature sensor. The controller is installed on the outer wall of the power equipment box body, the installation sleeve plate is fixedly connected to the inner wall of the metal column, and the temperature sensor is installed on the inner wall of the installation sleeve plate. According to the structure of the aluminum alloy metal columns arranged in the matrix mode and the outer wall arc-shaped cooling fins, the metal columns can accurately correspond to core heating components in the box to efficiently absorb heat, the heat exchange area between the cooling fins and air is greatly expanded, the passive heat dissipation capacity is enhanced, meanwhile, cold water in the metal columns can store heat, the water temperature rising speed is delayed, and the heat dissipation efficiency is improved. The problems that in a traditional heat dissipation mode, correspondence between a metal heat dissipation part and a heating source is poor, the heat exchange area is limited, and the heat dissipation efficiency is low due to the fact that heat is absorbed only through a single medium are solved.

The invention relates to a transformer substation bird three-dimensional positioning method and system based on double thermal infrared imagers, and belongs to the technical field of transformer substation safety monitoring. The system comprises a data acquisition module, a background heat source filtering module, a three-dimensional coordinate fusion module, a deep learning recognition module, a multi-modal meteorological compensation module, a trajectory prediction and early warning module and a data output and linkage control module. The method comprises the following steps: acquiring data cooperatively through double thermal infrared imagers, accurately identifying a bird target by using a deep learning model after background filtering and temperature threshold preliminary screening, calculating a three-dimensional space position of the bird target through coordinate fusion, and dynamically optimizing detection parameters in combination with real-time meteorological data. And finally, an improved Kalman filtering algorithm is adopted to predict a bird movement track, and early warning and linkage with a bird repelling device are realized. The problems of inaccurate positioning, poor environmental adaptability, early warning lag and the like in the prior art are solved, and the accuracy, the reliability and the active defense capability of bird monitoring of the transformer substation are improved.

The invention relates to a heat transfer system (10) with a heat source (14) and a heat sink (50), wherein the heat source (14) has a heat discharge arrangement (34) for heat discharge from the heat source (14) by means of a working fluid (12), wherein within the heat discharge arrangement (34) the working fluid (12) can be thermally coupled or coupled to the heat source (14), and wherein by means of the working fluid (12) the heat source (14) can be thermally coupled or coupled to the heat sink (50).A high and defined heat transfer over a large operating temperature range can be achieved by the heat transfer arrangement (34) comprising at least two stages arranged parallel in terms of flow, a first stage (36) and a second stage (42), for heat transfer from the heat source (14) to the working fluid (12), wherein the stages (36, 42) are designed such that they have a different thermal resistance between the heat source (14) and the working fluid (12).

A three-dimensional vapor chamber module is configured to be thermally coupled to a heat source. The three-dimensional vapor chamber module includes a first vapor chamber, a second vapor chamber, at least one first heat pipe and a plurality of boiling enhancement structures. The first vapor chamber has a first fluid chamber, and the first vapor chamber is configured to be thermally coupled to the heat source. The second vapor chamber has a second fluid chamber. The first heat pipe has a first fluid channel, and the first fluid channel communicates with the first fluid chamber and the second fluid chamber. The boiling enhancement structures are respectively disposed on the first vapor chamber and the second vapor chamber.

The invention discloses an optimal control method for metering a cold and heat storage air conditioning system in a laboratory, and relates to the technical field of optimal control, and the method comprises the following steps: predicting hourly cold load and heat load in a future preset period, and generating hourly load prediction data; obtaining time-of-use electricity price information, and generating electricity price time period division data; formulating an energy storage strategy based on hourly load prediction data and electricity price time division data; the method specifically comprises the steps that in the valley electricity price period, when it is predicted that a load demand exists in the future peak electricity price period, a cold and heat source module is controlled to operate, energy is stored in a cold and heat storage module till the rated capacity is reached or the valley period is ended, and the temperature and humidity in a laboratory are maintained within a first set range through a tail end processing module in the energy storage period; and formulating an energy release and conventional operation strategy based on hourly load prediction data, electricity price time division data and the real-time energy storage state of the cold storage and heat storage module. The method has the effect of improving the optimization control efficiency.

The invention discloses a liquid cooling case overload monitoring method based on an intelligent sensor. The method comprises the following steps: deploying a sensor network at a key node of a cooling flow channel of a liquid cooling case; all the sensors are connected with an edge computing gateway; the edge computing gateway synchronously collects data of the sensor and generates a time sequence data set; dynamically calculating the overall heat dissipation power P (t), the system flow resistance coefficient K (t) and a parameter eta (t) representing the cooling efficiency based on the time sequence data set; comparing the calculated value with a reference value, and performing overload risk assessment by applying a preset judgment logic; when the evaluation result exceeds a preset risk threshold value, triggering overload early warning, and generating a control instruction; and according to historical operation data of the system, carrying out periodic self-adaptive calibration on the reference value. By deploying the sensor network at the key node of the liquid cooling case and analyzing the collected data through the edge computing gateway, the response speed and the control precision of the system to the dynamic change of the heat source power are improved.

The present invention belongs to the technical field of material machining, and relates to a die-free mirror-image-based fiber placement method and a die-free mirror-image-based fiber placement system, which place fibers in a mirror symmetry manner without requiring dies, thereby improving the flexibility and efficiency of production. The method comprises: acquiring in real time the temperature and pressure of fibers; by using a temperature difference and a pressure difference, calculating the output power of a heater and a modified value of a path of a fiber placement tail end movement mechanism; and optimizing controller parameters by means of reinforcement learning, so as to realize stable control over the temperature and pressure. The system comprises a hardware portion and a control system, wherein the hardware portion includes components such as a pressure component and a heat source, and the control system performs adjustment on the basis of real-time feedback, thereby ensuring the quality of fiber placement. The present invention solves the problem of it being difficult to accurately control the temperature and pressure during die-free mirror-image-based fiber placement, and improves the performance of composite products.

An ice making module (100), and an ice maker and refrigerator having same. In the ice making module (100), a lifting device drives an upper die (26) to ascend or descend. After descending, the upper die (26) matches with a lower die (13) to form a plurality of ice making cavities. The top of the upper die (26) is provided with a plurality of water inlet holes, which are respectively in communication with the cavities. A quantitative water supply system (7) is in communication with the water inlet holes (261) to achieve quantitative water supply. The lower die (13) is connected to a turning device. The bottom of the lower die (13) is attached to a heat transfer block (12). Further comprised is a separation apparatus and / or a vent hole (122). The separation apparatus is used for separating the heat transfer block (12) and the lower die (13). The vent hole (122) communicates a gap between the heat transfer block (12) and the lower die (13). By means of the present ice making module (100), ice can be rapidly made, the dies can be rapidly separated from the heat source, the dies are easy to turn over, and the ice maker can collect overflow water to prevent the overflow water from soaking the device. The refrigerator is connected in series with an evaporator (33) of the ice making module (100) by means of an evaporator (102) of the refrigerator, or directly uses air from an air port of an air duct of a freezing chamber of the refrigerator to cool the dies, thereby saving energy.

The invention discloses the technical field of DIC measurement, and discloses a high-temperature DIC measurement thermal disturbance elimination device based on dual-channel common-optical-axis projection speckles and a method thereof.The device comprises a test piece, a speckle generation module, an illumination module, an image acquisition module, a heat source module and a common-optical-axis adjustment module, and the surface of the test piece is provided with an AB double-color speckle structure; the AB double-color speckle structure comprises an A-color projection speckle and a B-color free speckle, the A color and the B color are both blue or green and are different, and the common optical axis adjusting module enables a projection light path to coincide with the optical axis of the camera; according to the method, images are synchronously acquired through two channels, A-color projection speckles and B-color free speckles are extracted through different channels, thermal disturbance is eliminated in combination with a displacement difference model, the thermal disturbance elimination effect is remarkable, lateral hot airflow interference can be avoided, additional high-price equipment is not needed, the system is miniaturized, the cost is low, and the method is suitable for large-scale popularization and application. The method is suitable for various measurement scenes in a field high-temperature thermal disturbance environment, and is high in universality and good in real-time performance.

The invention relates to the technical field of power equipment monitoring and temperature sensors, and discloses a distribution box internal hot spot positioning method and system based on temperature field reconstruction. The method comprises the steps of obtaining an infrared thermal image of the outer wall of the distribution box; main loop and branch current signals are synchronously collected; extracting surface temperature distribution characteristics of the shell; constructing an internal electromagnetic heat source model; an internal three-dimensional temperature field is generated through multi-physics field coupling inversion calculation; and identifying the over-threshold region and outputting the spatial coordinates thereof. The system comprises an infrared thermal imaging module, a current acquisition module, a feature extraction module, a heat source modeling module, a temperature field reconstruction module and a hot spot positioning output module. According to the invention, a built-in sensor is not needed, non-contact, intrinsically safe and centimeter-level precision hot spot real-time positioning is realized, and the reliability and intelligent operation and maintenance level of a power distribution system are improved.

A method for optimizing process parameters of friction stir welding with synchronous rolling and a related device are provided. A heat source model is applied to a system finite element model, and heat transfer simulation is performed on the welding and cooling processes of friction stir welding. Furthermore, contact relationships and mechanical action relationships between a stirring tool finite element model and a weldment finite element model and between a roller finite element model and the weldment finite element model are applied in the system finite element model. Thermal-mechanical simulation is performed on the welding process, the cooling process and a clamp release process of friction stir welding with synchronous rolling with a temperature field result obtained from heat transfer simulation as an input. Based on the welding stress and welding deformation results obtained from thermal-mechanical simulation, process parameters are adjusted and re-simulated until optimal parameters are obtained.

Thermocompression bonding head fixture designs and techniques for use thereof are provided. In one aspect, an exemplary bonding head fixture includes: a workpiece contact surface; at least one recess in the workpiece contact surface; and heat passages leading into and out of the at least one recess. In another aspect, an exemplary bonding head includes: a bonding head fixture having a workpiece contact surface, at least one recess in the workpiece contact surface, and heat passages leading into and out of the at least one recess; and a heat source connected to at least one of the heat passages. Methods for use of the present bonding head fixtures are also provided.

This invention discloses a spot-and-ring laser filler wire welding method, comprising the following steps: cleaning the surface and bevel of the welding plate, and fixing the welding plate on a welding fixture; using a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding of the welding plate; adjusting the defocusing amount, setting the diameter of the circular spot, and setting the diameter of the annular spot; setting the power of the circular spot and the power of the annular spot; setting the welding speed and the wire feeding speed; starting the welding system to perform welding, selecting the number of welding passes until the welding plate completes the butt welding. This invention uses a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding. The circular spot is used to melt the filler wire to perform laser filler wire welding, and the annular spot is used to heat the sidewalls, preventing sidewall melting defects. This can avoid sidewall incomplete fusion defects during narrow-gap welding of thick plates.

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 provides a control method and device for a multi-heat-source heat supply system. The control method and device can be applied to the technical field of intelligent heat supply. The method comprises the following steps: performing nonlinear conversion on initial prediction characteristics obtained by performing gating processing on respective characteristic sequences of meteorological information and previous load information of a building to obtain load prediction information of a heat supply system, and performing fusion processing on node information, branch pipe information and respective constraint conditions in previous operation information of a heat supply pipe network to obtain load prediction information of the heat supply system; water and heat distribution information of the heat supply pipe network is obtained; on the basis of the load prediction information, the hydrothermal distribution information and a target function, start-stop combination information and load distribution information of the multiple heat supply devices in the target time window are determined, and the target function is determined by energy cost information, load fluctuation information of the heat supply devices and start-stop times; and converting the start-stop combination information and the load distribution information into a control instruction and sending the control instruction to execution equipment so as to carry out heat supply control on the heat supply system.

The invention discloses an evaporation pressure reference controller for a lithium bromide absorption refrigeration system. The evaporation pressure reference controller comprises a pressure detection unit, a reference unit, a comparison unit and an execution unit. The pressure detection unit detects absolute pressure in the evaporator in real time; the reference unit provides a reference signal of the target evaporation pressure; the comparison unit outputs a pressure deviation signal; and the execution unit adjusts the circulation volume of the lithium bromide solution so as to approach to the solution circulation volume under the full-load design working condition of the system, and the adjustment benchmark is the full-load design working condition of the system. The evaporation pressure serves as an absolute physical reference, the solution circulation amount is dynamically adjusted, the system is made to adapt to the heat source load, the concentration automatically avoids the crystallization line, and the functions of load monitoring, crystallization early warning, energy efficiency calculation and the like are provided. And the device is suitable for various low-grade heat source scenes such as hot water, steam and flue gas, can be used for new machine manufacturing and stock transformation, and reduces the equipment size and the manufacturing cost.