18 results about "Equivalent temperature" patented technology

The invention provides a temperature compensation method and system of a mass flowmeter, and relates to the technical field of mass flowmeters.The method comprises the steps that a space temperature field and a strain field covering a whole measuring pipe body are obtained, and a distributed heat-force coupling state is constructed; configuring a primary disturbance parameter set, projecting the primary disturbance parameter set to a natural vibration mode space, and constructing an equivalent temperature disturbance quantity; configuring the excitation frequency of dual-frequency vibration excitation; inputting a double-frequency response result into a temperature-flow decoupling model, and inversely constructing a temperature compensation factor; calculating an original estimated value of the flow, constructing a temperature compensation amount, fusing the original estimated value of the flow, and outputting a measurement result. The technical problem that in the prior art, due to the fact that single-point temperature measurement cannot accurately decouple the temperature effect under the complex working condition, measurement of the mass flow meter is inaccurate is solved, the space temperature field and the strain field of the whole measurement pipe body are obtained, self-adaptive compensation is conducted on sensitivity drifting of the measurement pipe, and the measurement accuracy is improved. And the measurement precision of the mass flow meter is improved.

This invention provides a method for simulating buckling of subsea pipelines based on the pipeline element method, addressing the problems of low computational efficiency, complex modeling, and low accuracy in existing methods. Based on Euler-Bernoulli beam theory, this invention models the pipeline as a series of efficient pipeline elements. Internal pressure is converted into equivalent temperature rise, and the effective thermal expansion force generated by the effective temperature rise is applied to both ends of the pipeline element to construct the total potential energy equation. The second derivative of the total potential energy equation is performed to obtain the tangent stiffness matrix of the pipeline element. An updated Lagrange method is used for coordinate transformation. The secant relationship is used to calculate the pipeline element and soil resistance. A Newton-Raphson incremental-iterative numerical program is established to perform nonlinear analysis of the pipeline, progressively solving for the deformation and stress of the pipeline under complex loads. This invention significantly reduces the number of elements, improves computational efficiency, and accurately simulates nonlinear pipe-soil interactions. It is applicable to various pipelines, including short pipes, long pipes, and corroded pipes, as well as complex working conditions such as high temperature and high pressure.

The invention relates to the technical field of urban green land planning, in particular to a landscape configuration method and system for improving the thermal equivalent temperature of an urban green land in a hot-summer and cold-winter region, and the method comprises the steps: carrying out the simulation of various green land layouts through the fusion of historical weather and wind data, screening out a target layout with the lowest physiological equivalent temperature, and carrying out the simulation of the layout. The restriction of summer high temperature on leisure activities of citizens is effectively relieved, and the core function of the green land is guaranteed. Through element effect analysis and response surface modeling, synergistic interaction and antagonism among different landscape elements (vegetation, water and permeable pavement) are quantitatively identified, cooling benefit weakening caused by improper configuration is avoided, and a design decision is more scientific in basis. And finally, constructing an overall optimization model which takes the physiological equivalent temperature minimization as a target and takes the cost constraint and the element value constraint into consideration, and solving an optimal element configuration scheme which takes the cooling effect and the economical efficiency into consideration. And an operable technical path is provided for high-quality and refined design of the urban green land.

This invention relates to the field of environmental control technology, and discloses an AI-based predictive adaptive environmental regulation method and system for prefabricated cabins. The method includes calculating the equivalent temperature and humidity within the prefabricated cabin; acquiring predicted temperature and humidity sequences over a time range t; determining the start-up and shutdown timing of the equipment based on a comparison of the predicted temperature and humidity sequences with environmental parameter limits; and continuing to acquire predicted data after the equipment completes the start-up and shutdown commands. This invention avoids conflicting operation and ineffective start-up and shutdown by constructing a dynamic control mechanism for the equipment; simultaneously, it achieves predictive proactive control to prevent environmental parameters within the prefabricated cabin from exceeding safety thresholds. Combined with dual operating modes, it flexibly switches control strategies according to the type of equipment within the prefabricated cabin, effectively reducing environmental fluctuations and suppressing condensation within the cabin, thereby reducing the equipment failure rate.

The invention relates to a deep sea sound velocity profile simulation device and an experiment method, and the device comprises a simulation pool which is connected with a plurality of layering partition plates in a plugging manner, the layering partition plates are sequentially arranged at intervals in the height direction of the simulation pool, and the simulation pool is divided into a plurality of equivalent temperature jump interlayers and a plurality of equivalent salt jump interlayers from top to bottom through the layering partition plates; the multiple equivalent temperature jump interlayers and the multiple equivalent salt jump interlayers are each provided with a water injection opening. The simulated seawater comprises upper-layer simulated seawater located in the multiple equivalent temperature jump interlayers and lower-layer simulated seawater located in the multiple equivalent salt jump layers, the salinity of the upper-layer simulated seawater is constant, the temperature of the upper-layer simulated seawater is sequentially decreased from top to bottom, and the temperature of the lower-layer simulated seawater is constant, and the salinity of the lower-layer simulated seawater is sequentially increased from top to bottom. The device can be used as a key means of onshore hydroacoustic experiments and replacement and supplement of offshore experiments, the experiment cost is greatly reduced, the experiment efficiency is improved, the safety risk is reduced, and the device has high economic value and engineering application potential.

The invention provides a method and a system for constructing a thermal hydroelastic equivalent model, and the method comprises the steps: obtaining the structural dynamic characteristics of a real aircraft in a target thermal environment through thermal-fluid-solid multi-physics field coupling simulation, and taking the structural dynamic characteristics as a target value of equivalent design; decoupling the aerodynamic thermal environment influence represented by the target value, and equivalently converting the aerodynamic thermal environment influence into design requirements for physical attributes of an equivalent model at normal temperature; based on the design requirements, an equivalent model with the structural dynamic characteristics matched with the target value under the normal temperature condition is designed through inversion of an optimization method. According to the design method of the thermodynamic elasticity model of the equivalent temperature effect, the influence of the temperature on the structure is equivalent to weakening of the structural strength, and related research on the thermodynamic elasticity can be carried out in a conventional hypersonic wind tunnel.

This invention discloses a structural thermo-mechanical coupling method and apparatus considering isogeometric analysis, belonging to the field of thermodynamics. The method includes: S1. Establishing an isogeometric NURBS model: providing the basis for expressing geometric and physical fields for thermo-mechanical coupling analysis, achieving seamless integration of CAD and CAE; S2. Calculating the transient temperature field based on the central difference method: obtaining the temperature distribution of the structure at different times, providing temperature input for subsequent thermo-mechanical coupling; S3. Transforming the temperature field into equivalent temperature loads: converting the thermal effects caused by temperature changes into equivalent loads identifiable by structural mechanics analysis; S4. Solving the stiffness equation of the structure under the combined action of external forces and temperature: obtaining the displacement matrix of the structural control points; S5. Solving the structural coupling field based on the displacement matrix: obtaining all key physical quantities in the thermo-mechanical coupling field, completing the coupling analysis. This invention can verify the feasibility of applying isogeometric analysis in coupled fields.

The invention discloses an intelligent temperature measuring method for coal field fire extinguishing advanced detection drilling, an intelligent temperature measuring device for coal field fire extinguishing advanced detection drilling, intelligent temperature measuring equipment and a computer readable storage medium. Two independent temperature sensors are integrated at the end of the probe to synchronously collect temperature information in a drill hole. In the measurement process, the system carries out real-time comparative analysis on data of the two sensors, judges the working states of the sensors according to the deviation degree of the two sensors, executes self-adaptive weighted fusion output when the deviation is in a normal range, and automatically identifies an abnormal sensor and switches to a single-sensor reliable mode when the deviation exceeds a threshold value. In addition, the system establishes a dynamic thermal response compensation model according to thermal inertia parameters of the sensor, corrects a transient measurement value in the moving process of the probe in real time, and outputs a compensated steady-state equivalent temperature. According to the invention, the problems of insufficient temperature measurement reliability and thermal response lag of a traditional single sensor are effectively solved.

The invention relates to the technical field of environment control, and discloses a prefabricated cabin self-adaptive environment adjusting method and system based on AI prediction, and the method comprises the steps: calculating the equivalent temperature and equivalent humidity in a prefabricated cabin; acquiring a predicted temperature sequence and a predicted humidity sequence within the time t range; determining the start-stop time of the equipment according to the comparison result of the predicted temperature sequence and the predicted humidity sequence with the environmental parameter limit value; and the equipment continuously obtains the prediction data after finishing the start-stop instruction. By constructing a dynamic regulation and control mechanism of the equipment, conflict operation and invalid start and stop of the equipment are avoided; meanwhile, predictive active regulation and control are achieved, environmental parameters in the prefabricated cabin are prevented from breaking through a safety threshold value, a dual-working mode is matched, control strategies are flexibly switched according to equipment types in the prefabricated cabin, environmental fluctuation is effectively reduced, condensation in the cabin is restrained, and therefore the equipment operation fault occurrence rate is reduced.

The invention discloses a rolling bearing bench test air cooling convection dissipation influence assessment method, which comprises the steps of collecting basic parameters of a rolling bearing bench test, including environmental parameters and cooling air flow field parameters; carrying out a rolling bearing bench test, and collecting temperature data, environment state data and flow data of cooling air of the rolling bearing in the test in real time; based on the basic parameters, the temperature data, the environment state data and the cooling air flow data, thermal physical property parameters of the air and the cooling air in the real-time state and the nominal state are calculated; calculating a convection dissipation coefficient under the comparison of a real-time state and a nominal state in the test based on the parameter; the bearing temperature collected in real time is converted into the equivalent temperature in the nominal state based on the coefficient, and then compliance judgment of the bearing performance is carried out; according to the method, the fairness and comparability of test results are enhanced, and a more scientific and reliable basis is provided for quality evaluation, performance comparison and compliance authentication of bearing products.

The invention belongs to the technical field of temperature monitoring, particularly relates to a temperature monitoring method and system for Chinese mugwort active ingredient storage equipment, and solves the problem that the temperature in the Chinese mugwort storage equipment is difficult to intelligently monitor, regulate and control by the existing temperature control technology. The monitoring method comprises the following steps: S1, carrying out weighted fusion on real-time temperature data of a plurality of sensors, and calculating to obtain an in-cabin reference temperature at the current moment; s2, calculating an equivalent temperature integral value for representing the accumulated loss risk of the active component; correcting a spatial thermal field distribution weight coefficient based on the equivalent temperature integral value; s3, selecting or configuring a corresponding prediction model, and resolving a temperature prediction value in a future short-time domain; and S4, generating and outputting a temperature regulation and control instruction. According to the method, the temperature change is pre-judged and intervened in advance, passive response type control is changed into active preventive regulation, and the medicinal value of Chinese mugwort is guaranteed.

The application provides a temperature compensation method and system of a mass flowmeter, and relates to the technical field of mass flowmeters.The method comprises the following steps: obtaining a spatial temperature field and a strain field covering the entire measuring pipe body, and constructing a distributed thermal-mechanical coupling state; configuring a primary disturbance parameter set, projecting it to an intrinsic vibration mode space, and constructing an equivalent temperature disturbance quantity; configuring an excitation frequency of a dual-frequency vibration excitation; inputting a dual-frequency response result into a temperature-flow decoupling model, and inversely constructing a temperature compensation factor; calculating a flow original estimation value, constructing a temperature compensation quantity, performing flow original estimation value fusion, and outputting a measurement result. The application solves the technical problem that the measurement of the mass flowmeter is inaccurate due to the fact that single-point temperature measurement cannot accurately decouple the temperature effect under complex working conditions in the prior art, obtains the spatial temperature field and the strain field of the entire measuring pipe body, adaptively compensates the sensitivity drift of the measuring pipe, and improves the measurement accuracy of the mass flowmeter.

This application provides a temperature control method and system for a dual-zone substrate heater. The temperature control method includes acquiring a first equivalent temperature and a first target temperature of the inner zone heating element, and a second equivalent temperature and a second target temperature of the outer zone heating element; in response to receiving an operating condition switching command, obtaining a first compensation power based on the target operating condition and the first target temperature, and obtaining a second compensation power based on the target operating condition and the second target temperature; determining a first base power based on the first equivalent temperature and the first target temperature, and determining a second base power based on the second equivalent temperature and the second target temperature; within the same control cycle after receiving the operating condition switching command, obtaining a first target power of the inner zone heating element based on the first base power and the first compensation power, and obtaining a second target power of the outer zone heating element based on the second base power and the second compensation power. The temperature control method of this application can cope with instantaneous disturbances caused by sudden changes in operating conditions and adapt to various operating conditions and temperature changes.

A thermal displacement estimating method includes: detecting each temperature of a predetermined heat generating portion and a predetermined main body structure portion by a temperature measurement device; and estimating a thermal displacement of the heat generating portion by an estimation model based on a detected temperature. The estimating of the thermal displacement includes: obtaining a conversion coefficient equivalent temperature change amount equivalent to a change amount of a conversion coefficient before and after a cooling capacity change from a relationship between a predetermined cooling heat amount of a cooling device and the conversion coefficient between the temperature and the displacement for estimating the thermal displacement from the detected temperature and / or a cooling heat amount equivalent temperature change amount equivalent to a changed heat amount before and after the cooling capacity change from a relationship between the predetermined cooling heat amount and a temperature equivalent to the cooling heat amount.

The invention discloses a bolt axial force measurement method based on a non-uniform temperature field, and relates to the technical field of bolt axial force measurement. Taking the bolt as a cylinder, establishing a temperature field model in a radial-axial section, converting the temperature field model into a two-dimensional model under a Cartesian coordinate system, describing the distribution of a temperature field to obtain a temperature field equation, setting a bolt boundary to meet a Dirichlet boundary condition, and obtaining a temperature distribution analytical solution of the bolt according to a superposition principle and a variable separation method; establishing a propagation time functional from an incidence point to a receiving point based on the Fermat principle, solving an extreme value and obtaining a control equation, and solving a propagation path in combination with a preset boundary condition; the propagation path length is corrected, the equivalent temperature is solved, and the axial force is calculated by adopting a double-wave method in combination with the sound time-axial force-temperature relation and utilizing the equivalent temperature. By solving the bolt temperature field distribution, the ultrasonic propagation path and the equivalent temperature, accurate compensation of the temperature error is realized, and the bolt axial force measurement accuracy can be effectively improved.

The invention discloses an aerogel felt performance evaluation method applied to frozen soil heat insulation, and relates to the technical field of frozen soil environment, and the method comprises the following steps: under a controlled one-dimensional heat transfer condition, determining corrected heat flux density acting on an aerogel felt sample; calculating to obtain equivalent thermal resistance of the aerogel felt sample in corresponding compaction and contact states; constructing a frozen soil interface temperature prediction model, and calculating to obtain a frozen soil temperature margin; constructing an equivalent heat flux model, and calculating a corresponding equivalent frozen soil interface temperature and an equivalent temperature margin; constructing a degradation thermal resistance model, correcting the equivalent thermal resistance to obtain degradation thermal resistance, and further calculating a thermal risk amplification coefficient; and calculating and constructing a normalized safety evaluation index based on the degradation temperature margin. According to the method, the engineering thermal load, the aerogel felt equivalent thermal resistance, the thermal load fluctuation conversion and the water-containing degradation effect are uniformly incorporated into the same evaluation chain, so that the conversion from a single material parameter to an engineering applicability index is realized.

The invention provides a thermal management control method and a vehicle, and relates to the technical field of thermal management, and the method comprises the steps: determining the predicted temperature of each heat source based on the actually measured temperature, the temperature measurement noise and the model estimation temperature, and determining the temperature weight coefficient corresponding to each heat source based on the actually measured state parameters; determining a global equivalent temperature based on the actually measured state parameter, the predicted temperature and the temperature weight coefficient of the heat source so as to perform thermal management control based on the global equivalent temperature; wherein the model estimation temperature is determined based on a pre-constructed multi-heat-source temperature coupling state model. According to the method, the multi-heat-source temperature coupling state model is constructed, multiple heat sources of which the temperature is independently controlled originally are brought into a unified thermodynamic framework, a foundation is laid for achieving a global collaborative optimization heat management strategy, the generated global equivalent temperature overall plans the heat management requirement of a multi-heat-source system with a single target, and the heat management efficiency is improved. And the heat redundancy exchange phenomenon caused by control strategy splitting in a traditional scheme is reduced.

The present application belongs to the technical field of fan rotating speed adjustment, and particularly relates to a heat dissipation fan rotating speed adjustment circuit and a control method thereof, aiming to solve the problems of independent power supply, single parameter, inaccurate adjustment and insufficient protection of the prior art. The method reuses the power supply circuit of the fan and LED series lamp beads, collects double parameters through a negative temperature coefficient thermistor and a humidity sensor, and calculates an equivalent temperature value through humidity compensation. According to the comparison result of the equivalent temperature value and a preset threshold value, the on-off state and duty cycle of a switch unit are controlled to realize multi-stage adaptive rotating speed adjustment. The actual rotating speed is obtained by detecting the current of the fan power supply circuit, and the deviation is fine-tuned by adjusting the on-off frequency. When the equivalent temperature value is greater than or equal to the limit protection temperature, the alarm, power consumption reduction and maximum rotating speed protection are triggered until the temperature drops below the high temperature threshold. The method does not require independent power supply, is accurate in adjustment, optimizes energy consumption, and is suitable for high-power LED lamp efficient heat dissipation.