12 results about "Thermodynamic temperature" patented technology

The invention provides a low-temperature fixed point thermodynamic temperature in-situ measurement and calibration device and method.The low-temperature fixed point thermodynamic temperature in-situ measurement and calibration device comprises a working cavity, a microwave resonant cavity and a fixed point coupling part are arranged in the working cavity in a sealed mode, a first thermometer is arranged on the microwave resonant cavity, and a second thermometer is arranged on the fixed point coupling part; a fixed point device and a second thermometer are arranged on the fixed point coupling part; the temperature control module is used for providing working temperature for the working cavity; the pressure control module is used for providing working pressure for the working cavity; and the acquisition module comprises an analyzer connected with the microwave resonant cavity and a temperature measurement bridge connected with the second thermometer, the analyzer is used for acquiring the microwave resonant frequency in the microwave resonant cavity, and the temperature measurement bridge is used for acquiring the resistance value of the second thermometer. According to the invention, the thermodynamic temperature T of the fixed point can be measured in situ, and the reproduction of the fixed point T90 is realized, so that the constructed R-T relationship of the standard resistance thermometer is more accurate.

The present invention discloses a thermodynamic temperature measurement device and method for synchronous measurement of multiple acoustic resonance frequencies. The signal generation module generates two or more sinusoidal voltage signals of different frequencies at the same time. After mixing and enhancement, the acoustic transducer generates sound waves of the same frequency as each sinusoidal voltage signal through mechanical vibration. The sound waves establish a sound field in the acoustic resonance cavity, so that the gas inside the acoustic resonance cavity generates vibrations of the corresponding frequency to achieve resonance. After the acoustic receiver is converted into a voltage signal, the signal demodulation module performs demodulation, and the signal processing module processes the demodulated signal to obtain the corresponding acoustic resonance frequency signal, and further calculates and obtains the corresponding thermodynamic temperature measurement result, thereby obtaining the final thermodynamic temperature measurement result. The present invention significantly accelerates the efficiency of measuring thermodynamic temperature by gas acoustic method by simultaneously performing excitation and measurement of two or more acoustic resonance frequencies while ensuring the measurement signal-to-noise ratio.

The invention relates to the field of thermophysical property measurement, and provides an in-situ measurement method and system for a density Virie coefficient and a characteristic thermodynamic temperature thereof, and the measurement method comprises the steps: S1, carrying out the in-situ measurement of the density Virie coefficient and the thermodynamic temperature: S10, carrying out the vacuum pumping of the measurement system, measuring the resonant frequency of a resonator in a vacuum state at a preset temperature, introducing a gas to be measured, and measuring the resonant frequency of the resonator under a preset pressure and a preset temperature; s11, according to the resonant frequency measurement result, calculating the experimental refractive index of the gas, and calculating the theoretical refractive index of the gas through a Virie state equation and a dielectric Virie theory; s12, iteratively solving to obtain experimental values Bexp of the thermodynamic temperature T and the density Virie coefficient; and S2, carrying out in-situ fitting or in-situ iteration on the characteristic temperature. Aiming at the problems of complex flow, poor measurement accuracy and the like of an existing measurement method, high-precision in-situ measurement of the gas density Virie coefficient and the characteristic temperature of the gas density Virie coefficient is realized.

This invention relates to a method and system for calculating and compensating the State of Charge (SOC) of a hydrogen storage system. The invention includes: real-time acquisition of the pressure and temperature of hydrogen gas within the storage container; correction of the pressure based on the pressure and temperature to obtain a standard pressure at 20°C; calculation of the initial SOC value using the pressure-temperature method based on the 20°C standard pressure; acquisition of the heat transfer coefficient, heat exchange area, real-time hydrogen storage mass, and hydrogen specific heat capacity at constant pressure within the storage container, and calculation of a thermal effect compensation coefficient based on the pressure change rate and temperature change rate; thermal effect compensation of the initial SOC value based on the thermal effect compensation coefficient to obtain a thermally compensated SOC value; correction of the hydrogen density based on the second virial coefficient of hydrogen, the real-time absolute pressure within the storage cylinder, and the real-time thermodynamic temperature to obtain a density correction coefficient; and correction of the thermally compensated SOC value based on the density correction coefficient to obtain the final SOC value. This invention improves the accuracy and stability of SOC calculation for hydrogen storage systems.

The present application relates to a kind of flame temperature distribution reconstruction methods based on complex dielectric constant model, comprising the following steps: first, the relationship model between relative dielectric constant ε r And conductivity σ With flame thermodynamic temperature T It is constructed;Second, a plurality of groups of flame different positions relative dielectric constant, conductivity and temperature data are collected, and the coefficient in the relationship model is determined;Third, the relative dielectric constant and conductivity distribution of flame are obtained using complex value capacitance tomography system, and the temperature of flame is calculated based on the relationship model to reconstruct the temperature distribution of flame.

This invention discloses a design method for a highly sensitive graphene temperature sensor, belonging to the field of micro-nano sensing technology. The method includes the following steps: S1, constructing a graphene geometric structure model and optimizing the structure; S2, introducing electron-phonon coupling to optimize the structure; S3, calculating the band structure based on the optimized structure; S4, calculating the temperature at a given temperature based on the band data. v F S5, based on v F S6. Calculate resistivity; S7. Set different thermodynamic temperatures and repeat steps S2 to S5; S8. Fit the resistivity-temperature change curve and calculate the temperature coefficient of resistance; S9. Construct a high-sensitivity graphene temperature sensor based on the temperature coefficient of resistance. The method of this invention does not rely on mobility models or empirical fitting parameters. It can self-consistently and quantitatively predict the temperature resistance characteristics of graphene based on the intrinsic response of the electronic structure, providing a theoretical basis for the design of high-sensitivity graphene temperature sensors.

The invention discloses a method for evaluating the service life of a building shock insulation support and application. According to the method, the aging time t at the critical value of the horizontal equivalent stiffness change rate is obtained through the horizontal equivalent stiffness change rate-aging time curve of the support sample, and then the service life of the support is evaluated through the fitting straight line of the aging time t and the thermodynamic temperature. The deduced evaluation method is simple, the adopted horizontal equivalent stiffness is matched with the actual use environment of the product, the test period can be greatly shortened, and safe use of the building is guaranteed more reliably.

The application provides a kind of gas temperature and humidity measurement control method, system and measuring equipment, it is related to gas temperature and humidity measurement control field, the method utilizes the sound speed value and sound attenuation coefficient of ultrasonic signal to the gas to be measured in transmission pipeline accurate calculation, utilize the thermodynamic temperature value and water vapor molar fraction value of the gas to be measured that the acoustic characteristics obtained are accurately calculated, and finally realize the high-precision temperature and humidity measurement of the gas to be measured.The ultrasonic transmitter and receiver used in the method are all arranged outside the transmission pipeline, realizing the non-contact measurement of the gas to be measured, and the correlation between the acoustic characteristics and physical characteristics of the gas to be measured is fully considered in the measurement and calculation process, which greatly improves the temperature and humidity measurement accuracy of the gas to be measured.

The invention discloses a desuperheater outlet soft measurement control method, system, equipment and medium, and relates to the technical field of temperature measurement, and the method comprises the steps: carrying out the fault judgment of a desuperheater outlet temperature measurement element, activating a soft measurement sensing array, calculating the specific enthalpy and temperature of outlet steam through a thermodynamic temperature calculation model, and calculating the temperature of the outlet steam. In combination with a heat balance water flow backstepping model, the real-time safety state of the boiler is evaluated by inputting demand setting and data screening, dynamically calculating the real-time desuperheating water flow and comprehensively analyzing the outlet steam temperature and the desuperheating water flow, and a result is packaged and sent to a boiler operation and maintenance center. The technical problem that in the prior art, when a temperature measuring element or a flow meter breaks down, a desuperheater system cannot be accurately monitored, regulated and controlled in real time, and the safety and stability of a boiler system are affected is solved, and the technical effects that the real-time performance and accuracy of data monitoring of the desuperheater system are guaranteed, and the safety and stability of the boiler system are improved are achieved.

The application provides a kind of gas temperature and humidity measurement control method, system and measuring equipment, it is related to gas temperature and humidity measurement control field, the method utilizes the sound speed value and sound attenuation coefficient of ultrasonic signal to the gas to be measured in transmission pipeline accurate calculation, utilize the thermodynamic temperature value and water vapor molar fraction value of the gas to be measured that the acoustic characteristics obtained are accurately calculated, and finally realize the high-precision temperature and humidity measurement of the gas to be measured.The ultrasonic transmitter and receiver used in the method are all arranged outside the transmission pipeline, realizing the non-contact measurement of the gas to be measured, and the correlation between the acoustic characteristics and physical characteristics of the gas to be measured is fully considered in the measurement and calculation process, which greatly improves the temperature and humidity measurement accuracy of the gas to be measured.

The application discloses a cold storage unit fault early warning system and method based on predictive maintenance, and belongs to the technical field of cold storage unit fault early warning, and comprises: a delay dynamic calibration module, which is used for synchronously collecting multi-source operation signals of the cold storage unit and dynamically calibrating the physical propagation delay of fluid state and mechanical response; a signal decoupling and residual extraction module, which is used for time domain alignment based on the physical propagation delay, cancellation processing of compressor vibration signals and thermodynamic signals to extract mechanical residual features; a cross-domain evolution state identification module, which is used for identifying the running period evolution state in combination with the mechanical residual features and macroscopic thermodynamic parameters, and estimating the refrigerant migration mass fraction according to the thermodynamic temperature difference driving force in the shutdown period to identify the shutdown period evolution state; and an advanced intervention and defense control module, which is used for executing advanced compensation intervention or pre-defense starting control according to the evolution state, so that the accurate perception and advanced defense of the cold storage unit fault early warning are realized.

The invention provides a fused quartz element CO2 laser annealing method and system based on hypothetical temperature, and belongs to the field of engineering optics. The problems that in the CO2 laser polishing process of the fused quartz element, the material modification degree and residual stress are too large, and consequently the element deforms and even cracks are formed are solved. The fused quartz element is subjected to laser surface scanning, proper annealing parameters are adopted, the surface layer temperature is controlled to be higher than the material softening temperature (1700K) and lower than the material melting temperature (2293K), and the thermodynamic temperature cooling speed of the material is reduced, so that the hypothetical temperature of the surface layer material is greatly reduced, and the surface modification degree and the residual stress are reduced; and finally, laser annealing of the fused quartz element is realized.