199 results about "Thermal balance" patented technology

The invention discloses a temperature compensation method and system, and the method comprises the steps: receiving a valve block temperature signal collected by a temperature sensor integrated with a pressure sensor in a closed gas supply unit, and an electronic element temperature and environment temperature signal collected by a temperature sensor on a control unit PCB, generating an initial temperature-working condition data set by combining the power of the air pump and the working duration of the electromagnetic valve; performing thermal resistance network modeling on the initial temperature-working condition data set, constructing a multi-node thermal characteristic matrix, and decomposing the matrix into a plurality of sub-matrixes; performing real-time operation on the sub-matrix by using a dynamic heat balance algorithm to generate a temperature estimation result of the key component; and generating a temperature compensation control instruction according to the temperature estimation result of the key component. According to the embodiment of the invention, the temperature of the key component can be accurately estimated, dynamic compensation is realized, and the control precision and stability of the closed gas supply unit are improved.

The invention discloses a heat dissipation control method and device of a liquid cooling charging pile and a medium, is applied to a liquid cooling control panel, and relates to the technical field of electric vehicle charging, and the method comprises the steps: collecting the original temperature data of a plurality of key nodes in a charging pile liquid cooling system in real time; the key node at least comprises a charging gun head and a cooling liquid inlet / outlet; comparing the original temperature data with a preset multi-stage temperature threshold value, and determining a current thermal state of the charging pile liquid cooling system according to a comparison result; according to the current thermal state, control parameters of a heat dissipation actuator in the charging pile liquid cooling system are generated through a pre-constructed temperature control engine; and generating a heat dissipation driving signal based on the control parameter, and sending the heat dissipation driving signal to a heat dissipation actuator so as to adjust the operation state of the heat dissipation actuator, so that the temperature of the charging pile liquid cooling system is maintained within the target temperature range. And according to different thermal state intelligent switching control strategies, it is ensured that the liquid cooling system can quickly respond and maintain the optimal thermal balance under any working condition.

The invention discloses a thermodynamic system parameter distribution method and device, and the method comprises the steps: S1, analyzing a block definition diagram and an internal block diagram from a SysML model to obtain a module structure description, a module value attribute, an interface specification of an equipment unit and a thermodynamic parameter description, and generating an analysis result, the analysis result comprises equipment unit port and connector information. And S2, based on the analysis result, mapping the equipment module to a simulation software element through name matching, and generating a steady-state thermal simulation model. And S3, associating the module value attributes with element attributes of the steady-state thermal simulation model through a parameter mapping mechanism, and generating attribute mapping data. And S4, generating a complementation parameter list according to the external design value and the heat balance demand. Therefore, the efficiency and accuracy of parameter allocation are improved, manual intervention is reduced, and it is ensured that the allocation result meets the requirements of system performance.

The invention relates to the technical field of polycrystalline silicon preparation, and discloses a polycrystalline silicon reduction furnace intelligent regulation and control system based on multi-parameter prediction, which is based on full-dimensional data such as current, raw material purity, silicon rod temperature and the like acquired by a multi-parameter sensing module, and realizes the intelligent regulation and control of a polycrystalline silicon reduction furnace through a burst interference quantification sub-module in a bidirectional linkage fusion prediction module. The deviation entropy quantification interference intensity of the multi-parameter change rate is calculated, migration learning emergency correction terms are synchronously called to dynamically compensate prediction errors, meanwhile, the one-way dependence defect is broken through, and a dynamic physical boundary is provided for a data driving prediction constraint module through physics, electrode contact resistance and in-furnace heat balance parameters; the NMPC module takes a bidirectional fusion high-precision predicted value as a target, solves a multi-target optimization control sequence and issues and executes the multi-target optimization control sequence, and the closed-loop iterative optimization module synchronously updates physical and data model parameters through incremental learning on the basis of an actual regulation and control effect, so that the problems of current regulation lag and formula parameter stiffness are solved, and long-term stable operation of the reduction furnace is supported.

The invention relates to the technical field of power equipment monitoring and fault diagnosis, and discloses a power transformer fault early warning method and system. The method comprises the following steps: acquiring a load current sequence, an environment temperature sequence and a top oil temperature sequence of a transformer; calculating an initial actually measured temperature rise based on the top oil temperature and the environment temperature, and determining thermal response lag time through cross-correlation analysis; carrying out translation correction on the load current according to the lag time, and constructing a time-aligned excitation input set and an actually measured temperature rise sequence based on a common effective time window; substituting the excitation input set into a thermal circuit model based on a thermal balance differential equation to calculate a theoretical reference temperature rise, calculating a residual error in combination with an actually measured temperature rise sequence, performing moving average filtering, and constructing a fault feature vector; and inputting the fault feature vector into a fault diagnosis classification model to determine a fault type and severity, and generating a grading early warning instruction according to the fault type and severity. According to the method, thermal hysteresis interference can be eliminated, and accurate quantitative early warning of the latent thermal fault of the transformer under the dynamic working condition is realized.

The invention relates to the field of polyimide films, and discloses a catalytic polyimide film with a low thermal expansion coefficient and a preparation method thereof, the catalytic polyimide film comprises 43-47% of a rigid polyimide material, 28-32% of a flexible polyimide material, 4-6% of a dynamic cross-linking agent, 7-9% of a component agent, and the balance of a solvent; the dynamic cross-linking agent comprises maleimide terminated polyamide and a difuran compound, and the ratio of the maleimide terminated polyamide to the difuran compound is 3: 2. Through the synergistic effect of constructing a stable framework by a rigid polyimide material, buffering stress by a flexible polyimide material and uniformly dissipating heat by flaky boron nitride, a chemical regulation and control system of'rigid constraint-flexible buffering-heat conduction balance 'is formed, thermal expansion is inhibited from the molecular level, and compared with a traditional physical method which purely depends on external force or a single component, the thermal expansion coefficient is greatly improved. According to the system, through complementation of chemical mechanisms of all components, the dimensional stability under temperature fluctuation is improved to a new height, and the problem that the thermal expansion coefficient in a wide temperature range is difficult to control is solved.

The invention discloses a control method, and particularly relates to an energy storage power converter self-adaptive control method based on digital twinning, which comprises the following steps: step 1, digital twinning model synchronization and state sensing; step 2, multi-target collaborative optimization based on prediction; and step 3, optimizing instruction issuing and physical system execution. Through real-time prediction and optimization of the digital twinborn model, it is ensured that the power switch tube always works in a zero-voltage switching state, switching loss is effectively reduced, and overall efficiency is improved. Dynamic thermal balance management is realized by combining thermal model prediction, local overheating is avoided, the service life of devices is prolonged, and the reliability of long-term operation of the system is enhanced.

The invention discloses an infiltration type energy storage spraying temperature control integrated system based on intelligent adjustment, and belongs to the technical field of heat management of energy storage batteries. The system intelligently analyzes battery temperature data through the main control module, and dynamically adjusts the working mode (heating or heat dissipation) of the temperature control device and a heat-conducting medium conveying path (passing through the battery monitoring unit and then the battery pack, or passing through the battery pack and then the battery monitoring unit), thereby realizing bidirectional heat path control. The core of the system lies in software innovation such as a multi-mode adjustment algorithm, a thermal runaway prediction model and a self-adaptive spraying strategy, thermal management efficiency can be optimized according to the real-time state of the battery, energy consumption is reduced, and thermal balance is improved. Compared with the prior art, the system reduces the dependence on a complex mechanical structure through modularized intelligent control, and remarkably improves the safety and energy efficiency ratio of the energy storage system. Further, a digital twinborn simulation module is introduced into the system, control parameters are optimized in real time through virtual mapping, and graded response of thermal runaway is achieved in combination with a gradient spraying strategy.

The invention relates to the technical field of cable production and manufacturing and automation control, in particular to an energy-saving cable extrusion production process control system, which comprises a data acquisition module for acquiring real-time working condition parameters of an extrusion production line; the rheological thermal coupling analysis module is used for resolving the shear heat contribution rate under the current working condition; the heat engine response decoupling module is used for determining a heat engine response lag time difference between mechanical shear heat and machine barrel heat conduction; the energy efficiency optimization calculation module is configured to generate a dynamic heat balance control strategy aiming at an unsteady state working condition according to the heat engine response lag time difference and a preset unit output ratio energy consumption target; the self-adaptive execution module is configured to output a cooperative control instruction for a heating and cooling system and a screw driving system based on the dynamic heat balance control strategy so as to realize minimization of system energy consumption; according to the method, the common energy confrontation phenomenon of alternate operation of heating and cooling in traditional control is solved, and the energy consumption in the transition process is greatly reduced.

The invention relates to the field of thermal power generating unit thermodynamic equilibrium adjustment, and provides a thermal power generating unit thermodynamic equilibrium adjustment system and method, and the system comprises a multi-source data collection module which is used for collecting multi-source data in the operation of a thermal power generating unit in real time; the thermodynamic state evaluation module is used for constructing a thermodynamic system dynamic model and calculating a current thermodynamic equilibrium state index; the multi-level coordinated regulation and control module is used for generating a multivariable coordinated control instruction according to the current thermodynamic equilibrium state index and the control strategy; the self-adaptive optimization decision module is used for dynamically adjusting a control strategy based on the historical operation data and the real-time thermal state; and the actuating mechanism driving module is used for converting the multivariable coordination control instruction into an operation signal and driving an actuating mechanism to act. The thermal power state of the thermal power generating unit can be comprehensively and accurately monitored, the dynamic response speed and the control precision are improved, the adaptability and the robustness of different working conditions are enhanced, reliable execution of an adjusting instruction is ensured, and the operation economical efficiency and the environment-friendly performance of the unit are effectively improved.

The present application belongs to the technical field of modular multilevel converter, and particularly relates to a kind of MMC half-bridge sub-module inter-thermal balance control method.The present application takes voltage balance principle and junction temperature balance principle as core, by predicting the junction temperature trend of half-bridge sub-module switching device in next control cycle, the junction temperature of half-bridge sub-module switching device and capacitor voltage are combined to set weight factor C for half-bridge sub-module switching control, which can realize the junction temperature balance of switching device between different half-bridge sub-modules in the same bridge arm.By taking half-bridge sub-module as the research object, and considering the temperature of the four switching tubes in its topology, the thermal balance control of MMC under different operating modes can be realized.By embedding the junction temperature control variable into the voltage balance algorithm and ensuring the stable operation of the MMC system, the junction temperature balance effect of the switching devices between the half-bridge sub-modules can be effectively improved, which can effectively reduce the pressure of uneven thermal stress distribution between the half-bridge sub-modules and improve the operation reliability of the MMC system.

The invention discloses an SOEC temperature control system based on off-line identification of a heat transfer mechanism model, and the system achieves the decoupling of parameter obtaining and temperature control execution through the mode of obtaining a heat balance equivalent parameter through the off-line identification of a pre-constructed system identification target function, does not need to achieve the online parameter identification, and can achieve the real-time temperature control. The environment temperature is used when the feed-forward power is calculated, so that the capability of inhibiting disturbance generated by the change of the environment temperature can be improved, stable and high-precision temperature control can be ensured, meanwhile, heat balance equivalent parameters are adopted, the temperature dynamic characteristics can be accurately described, known disturbance can be effectively compensated in the feed-forward link, and the stability of the feed-forward power is improved. And the response speed and the robustness are obviously improved. Calculation of the feedforward control signal and the feedback control signal is based on real-time measurement data instead of depending on simulation data or data obtained through an offline experiment, and the control accuracy is improved.

The invention provides a thermal balance calculation method and device of a differential mechanism, the differential mechanism, a storage medium and an electronic device.The method comprises the steps that geometric parameters of a planetary gear and a half axle gear of the differential mechanism, the rotating speed of the half axle gear and the input torque are obtained; calculating contact pressure data between the planetary gear and the half axle gear according to the geometric parameters and the input torque; calculating a friction pair bearing characteristic number of the differential according to the contact pressure data; acquiring the friction coefficient in the differential according to the characteristic number of the friction pair bearing; calculating the total friction loss power of the differential according to the friction coefficient, the half axle gear rotating speed and the contact pressure data; and the cooling oil amount needed by the differential in unit time is calculated according to the friction loss total power and the lubricating oil parameters. According to the embodiment, a scheme for accurately calculating the cooling lubricating oil amount of the differential mechanism is achieved, a forced lubrication differential mechanism structure is provided, and the problems of reliability and efficiency caused by cooling lubrication of the differential mechanism in the related technology are solved.

This invention discloses a dual-frequency composite induction strengthening process for medium carbon steel, gradient hardened layer parts, and a production system. The process includes: selecting SAE 1045 medium carbon steel and performing quenching and tempering pretreatment; precision machining to form outer circular channels and inner ball channels; performing dual-frequency composite induction hardening on the outer circular channels and inner ball channels respectively, i.e., preheating to 680-750℃ with medium-frequency current, then rapidly heating to 880-920℃ with high-frequency current followed by spray cooling, and using thermal balance control to form a gentle transition zone with a width of 2-5mm between the two hardened zones, where the hardness gradient along the axial line connecting the two hardened zones does not exceed ΔHRC10 / mm; finally, low-temperature tempering. This invention also discloses wear-resistant parts with a dual-layer composite hardened layer structure and a gradient transition zone prepared using this process, as well as an online composite strengthening production system. This invention replaces low-carbon alloy steel with medium-carbon steel and replaces overall carburizing with local dual-frequency induction hardening, which can reduce raw material costs and energy consumption, reduce deformation, and obtain a hardened layer that meets the depth requirements, thus realizing online continuous production of heat treatment and machining.

The application relates to the technical field of data regulation, in particular to an intelligent control method for an air conditioning system for temperature control of a server room, which comprises the following steps: acquiring temperature data, wind direction data and load power data of each monitoring position in a time monitoring window of the server room; acquiring temperature data and total load data of a corresponding channel position of each air conditioner; obtaining a thermal regulation demand index according to the fluctuation of the temperature data, the difference of the wind direction data of each monitoring position, and the change coordination between the temperature data and the load power data; obtaining a thermal radiation characteristic index according to the change coordination of the temperature data of adjacent channel positions and the change coordination of the total load data of the adjacent channel positions; and regulating the air conditioner temperature according to the thermal regulation demand index and the thermal radiation characteristic index corresponding to each air conditioner. The application makes the temperature regulation result more reasonable, realizes dynamic thermal balance among different channels and maintains the temperature stability of the server room.

The invention discloses a laser heat treatment method and device for a high-pressure gas lamp, and belongs to the technical field of gas discharge lamps. Setting a standard heating rate, a standard cooling rate, a first heat preservation temperature, a first heat preservation time, a second heat preservation temperature and a second heat preservation time; a two-stage heating method is adopted, and the actual heating rate is regulated and controlled in cooperation with a temperature control system; after heat preservation is finished, the temperature control system carries out cooling operation; and the temperature control system regulates and controls the actual cooling rate according to the standard cooling rate until the actual temperature is reduced to the room temperature. By adopting the device and the method disclosed by the invention, performance stabilization treatment can be carried out on the finished high-pressure gas lamp, so that each component in the high-pressure gas lamp reaches a heat balance state, the residual stress of a quartz bulb shell is eliminated, and the stability of the product performance is ensured; early failure products are effectively screened, and the reliability of follow-up factory lamps is ensured.

The invention relates to the technical field of artificial intelligence, and discloses a method for adaptively adjusting the ratio of an improver based on an AI (artificial intelligence) algorithm, according to the method, multi-field parameters are obtained by using a composite material micro pile embedded with a sensing array, and the evolution trend of a stratum is predicted through a heat-water-force multi-field coupling evolution model. And an artificial intelligence algorithm calculates a modifying agent proportion vector changing along with depth according to a prediction result, and drives a grouting system to adjust the concentration of the active component. And the physical boundary of the micro pile group is utilized to guide a flow field to form a transverse overlapping reinforcing belt. The phase change component in the modifier releases latent heat at a preset temperature, and intervenes in formation heat balance in cooperation with physical heat barrier of the micro piles. And the system executes parameter inversion through measured data and updates an algorithm weight. According to the method, accurate matching of the treatment scheme and stratum heterogeneity is achieved, frost heaving deformation of the foundation is effectively restrained, and the structural stability of the high and cold large-thickness foundation is guaranteed.

The application discloses a parameter determination method and device, and relates to the technical field of electric vehicles. The method comprises the following steps: determining a first coefficient according to test data of a first test, wherein the first test is a test in which a battery reaches thermal equilibrium under the same initial battery temperature, different ambient temperatures and different cooling liquid temperatures; determining a second coefficient according to test data of a second test, wherein the second test is a test in which the battery reaches thermal equilibrium under the same initial battery temperature, the same cooling liquid temperature and different ambient temperatures; determining a temperature curve for realizing thermal equilibrium of the battery according to the first coefficient, the second coefficient and a predefined thermal equilibrium relationship; and determining the shortest time required for the battery to reach thermal equilibrium under different ambient temperatures, and corresponding cooling liquid temperatures and third thermal equilibrium temperatures according to the temperature curve. The scheme shortens the test period, reduces the cost input and is convenient to operate.

The utility model belongs to the technical field of micro-channel reaction equipment, and particularly discloses a micro-channel reactor which comprises a cooling water pipe, a feeding pipe, a plurality of U-shaped pipes and a discharging pipe, the cooling water pipe is communicated with a plurality of water feeding pipes, each water feeding pipe is communicated with two water feeding branch pipes, the plurality of U-shaped pipes are sequentially communicated in an S shape, and the discharging pipe is communicated with the U-shaped pipes. Each water feeding branch pipe is communicated with the connecting position of the corresponding U-shaped pipe, each U-shaped pipe is composed of a jacketed pipe and an inner pipe, the jacketed pipes are connected to the inner pipes in a sleeved mode, the feeding pipe, the discharging pipe and the U-shaped pipes are all communicated with water return pipes, each water return pipe is provided with a water return thermometer and a water return valve, and the connecting position of each U-shaped pipe is provided with a water feeding thermometer. The micro-channel reactor can effectively improve the reaction uniformity, stabilize the pressure and improve the production safety, the design of the jacketed pipe can effectively reduce heat loss and maintain the heat balance of a reaction system, cooling water enters the multiple branch pipes synchronously, and the stability of the temperature and the pressure of the inner pipe can be maintained.

The application discloses a MiniLED chromatic aberration suppression method based on a thermal balance packaging structure and a display device, relates to the technical field of semiconductor display, and comprises a composite substrate, a thermoelectric cooler (TEC) array, a MiniLED chip array, a phase change material layer and a dynamic temperature control system; the MiniLED chromatic aberration suppression display method based on the thermal balance packaging structure comprises the following steps: S1, preparing the composite substrate: adopting a copper-graphene composite material as the substrate, forming a microchannel with a width of 200 mu m and a depth of 150 mu m in the substrate by laser etching; S2, the thermoelectric cooler (TEC) array: distributing TEC units on the back of the substrate according to regions; S3, the die bonding process: using high-thermal-conductivity silver glue to fix the MiniLED chip, applying a 5N die bonding pressure and curing at 80 DEG C; S4, filling the phase change material, which is suitable for solving the chromatic aberration problem caused by uneven temperature distribution and realizing high-precision display control of chromatic aberration.

The invention relates to the technical field of metal hydrogenation, and discloses a metal hydride preparation method, which comprises: S1, gas introduction: continuously introducing hydrogen gas with a pressure of 1-6 MPa and a temperature of 50-500 DEG C into a vertical reactor to form an upflow from bottom to top; and S2, hydrogenation: continuously feeding metal powder with the particle size of less than 2000 microns through a feeding pipe, carrying out hydrogenation reaction under the lifting of ascending airflow, discharging the product from an air outlet pipe along with the airflow, and starting a reaction heat exchanger to control the temperature and maintain the temperature required by the reaction. According to the method, metal powder is suspended and dispersed through ascending airflow, gas-solid contact is enhanced, and the reaction efficiency is improved; upflow has the functions of reaction and heat dissipation, reaction heat is timely guided out through convection, and caking or melting caused by local overheating is prevented; by combining temperature regulation and control of the reaction heat exchanger, dynamic heat balance is realized, the reaction stability is effectively guaranteed, the purity and granularity uniformity of the product are remarkably improved, and the method is suitable for continuous and high-quality metal hydride preparation.

The application discloses a kind of building indoor temperature prediction method and system based on thermal resistance-thermal capacity model, the method of the present application includes the heat flow in the heat transfer process of building indoor temperature is regarded as electric current, temperature difference is regarded as voltage, thermal resistance and thermal capacity correspond to resistance and capacitance respectively, the temperature transfer system of building indoor temperature is simplified and constructed to obtain the thermal resistance-thermal capacity model consisting of thermal resistance and thermal capacity;Thermal balance equation of thermal resistance-thermal capacity model is constructed;Parameter identification is carried out on thermal balance equation;The identified parameter is substituted into thermal balance equation to predict building indoor temperature.The present application aims to solve the problem that the existing building indoor temperature prediction grey box model has poor interpretability, improve the accuracy and interpretability of building indoor temperature prediction.

This application provides a projection device. The projection device includes a housing assembly, a first lens, and an electronic device. The housing assembly includes a wall and a first locking position extending from the inner wall of the wall toward the interior of the wall; the first lens is engaged with the first locking position, separating a first chamber and a second chamber of the wall; the electronic device is at least partially disposed in the second chamber; an opening is formed between the first lens and the inner wall of the wall, the opening connecting the first chamber and the second chamber, allowing heat generated by the electronic device to be transferred from the second chamber to the first chamber through the opening. By providing an opening on the housing assembly connecting the first and second chambers, this application allows heat generated by the electronic device in the second chamber to diffuse to the first chamber, thereby enabling the projection device to reach thermal equilibrium more quickly, avoiding prolonged high temperatures in the second chamber, extending the lifespan of the projection device, and improving the user experience.

This invention relates to the field of circuit thermal equalization analysis technology, and particularly to a method, device, equipment, and storage medium for thermal equalization adjustment of three-phase drive circuits. The method analyzes the sampling voltages of the first, second, and third phases according to a preset linear mapping formula to obtain the maximum junction temperature difference. If the maximum junction temperature difference is less than a hysteresis threshold, the reference duty cycle of the first, second, and third phases is analyzed based on the current operating conditions and a preset amplitude coefficient to obtain a thermal equalization adjustment command. By acquiring the characteristic voltage of the IGBT and obtaining the maximum junction temperature difference through linear mapping, the degree of thermal imbalance is quantified. Adjustment is triggered using the hysteresis threshold, and an equalization command is generated by combining the three-phase reference duty cycle to accurately optimize the junction temperature distribution, reduce the temperature difference, extend device life, and improve the reliability and stability of the three-phase drive circuit.

The invention relates to the technical field of flat valves, and discloses a self-sensing heat balance regulation and control high-temperature flat valve which comprises a valve body, a valve cover, a valve seat arranged in the valve body, a gate plate ascending and descending in the valve body to open and close a flow channel, a valve rod connected with the gate plate and a self-sensing heat balance regulation and control system. The self-sensing heat balance regulation and control system comprises a multi-parameter sensing unit and a control unit, wherein the multi-parameter sensing unit comprises a plurality of sensors used for acquiring temperatures, opening and closing torques and medium pressures of all positions of a flat valve; the regulation and control unit is configured to generate a thermal imbalance state criterion based on the detection data of the plurality of sensors and output a regulation and control instruction; and the valve rod position adjusting unit is arranged at the valve rod penetrating-out channel of the valve cover, is matched with the valve rod, and is configured to automatically correct the position of the valve rod under the triggering of the regulation and control instruction. The state of the valve is monitored in real time, the geometric center of the valve rod is actively adjusted, the action reliability of the valve under temperature fluctuation is ensured, and equipment faults caused by heat jamming are avoided.

The application discloses a method for improving current efficiency of an electrolytic cell, and relates to the technical field of electrolytic aluminum, which guarantees stable thermal balance of the electrolytic cell and improves current efficiency. The main technical scheme of the application is as follows: the method for improving current efficiency of the electrolytic cell comprises the following steps: S1, parameter acquisition and configuration; S2, target parameter determination and configuration; S3, current state parameter setting; S4, voltage additional amount calculation; S5, aluminum fluoride addition amount calculation; S6, voltage regulation execution; and S7, aluminum fluoride feeding control.

The present application relates to the technical field of industrial automation instrument and intelligent sensor detection, in particular to a pressure transmitter debugging and checking method; comprising parameter acquisition, thermal hysteresis evolution, error calculation and pressure reconstruction module; the method collects temperature and pressure data in non-steady state environment; the core is to calculate the internal temperature by using the filling liquid thermal hysteresis model, combine the transient pseudo pressure with the viscoelastic hysteresis error model, calculate the error caused by thermal imbalance and material hysteresis, and reconstruct the real steady state pressure; the present application realizes the change from static waiting to dynamic prediction, eliminates the thermal balance waiting time through prediction, and greatly improves the production efficiency.

The invention provides a corrosion-resistant methanol engine wet cylinder sleeve, and belongs to the technical field of internal combustion engines. The methanol engine wet cylinder sleeve is composed of a stainless steel 2507 matrix, and the stainless steel 2507 matrix comprises the following chemical components in percentage by weight: less than or equal to 0.03% of C; chromium (Cr): 24.0%-26.0%; 3%-5% of Mo (molybdenum); 6.0%-8.0% of nickel (Ni); copper Cu: less than or equal to 0.5%; mn: less than or equal to 1.2%; si: less than or equal to 0.8%; less than or equal to 0.035% of phosphorus P; 0.24% to 0.32% of nitrogen N; and the balance of Fe and inevitable impurities. And a lift reticulate pattern structure is honed on the inner surface. The corrosion problem of the methanol engine cylinder sleeve can be effectively solved; the honing surface of 15-30 degrees is arranged on the inner side of the cylinder sleeve to process reticulate patterns, necessary lubricating oil can be stored, and therefore abrasion reduction in the piston operation process is achieved; the cooling area base body is thinned, the annular heat dissipation ribs are additionally arranged on the base body, the heat exchange effect is enhanced, and heat balance of engine cooling is guaranteed.

The invention discloses an electronic thermometer capable of quickly measuring body temperature. A heating source 1 with controllable temperature, a thermistor 2 for dynamically monitoring heat balance and a thermistor 3 for sensing body temperature are used in the thermometer as shown in the attached drawing to jointly form a heating and temperature measuring system, so that the body temperature can be quickly measured.

The application relates to a micro-nano scale indentation test method for high-temperature yield strength of materials, and belongs to the technical field of material strength test, which comprises the following steps: S1, fixing a sample to be tested on a sample table, and vacuumizing a sample bin; S2, temperature matching of the sample to be tested and a flat pressure head, so that thermal equilibrium is achieved between the flat pressure head and the sample to be tested; S3, indentation test of the sample to be tested by the flat pressure head, and obtaining a curve of displacement and load change with time; S4, non-parametric regression method is used to smooth the displacement load or displacement time curve, then the curve is differentiated, an analysis area is selected on the differentiated curve, and a segmented linear function is used for fitting to obtain a yield point, and yield strength of the sample is calculated according to the load of the yield point and the diameter of the flat pressure head. The method provided by the application can obtain yield strength at room temperature and above room temperature which is difficult to measure by conventional methods, and has high test precision and small uncertainty.