31 results about "Virtual temperature" patented technology

Methods and apparatuses for providing virtual temperature sensor to control temperatures in a data processing system. In one aspect, a data processing system includes a virtual temperature sensor to provide system temperature for different system configurations, and a controller coupled to the sensor to control operations of the data processing system according to the virtual temperature. The virtual temperature sensor typically derives the temperature of a particular configuration of the data processing system using mathematical models or one or more operating parameters of the data processing system. In one example, the mathematical models include a characterization table which provides the measured temperature data from various system configurations. These measurements are performed with temperature sensors positioned in ideal locations for different configuration, and are preprocessed to provide the virtual temperature computation. The characterization table also includes thermal characteristics, such as thermal time constant and thermal resistance, of the critical components at multiple thermal control states.

A method for determining the efficiency of a diesel oxidation catalyst (DOC) having an inlet and an outlet for the flow of an exhaust gas stream in an exhaust system used in conjunction with an electronic controlled internal combustion engine equipped with an Electronic Control Unit (ECU) having memory, comprising:

determining temperature of the exhaust gas stream at the DOC inlet;

determining temperature of the exhaust gas stream at the DOC outlet;

determining the energy released from the DOC; and

comparing an actual change in temperature of the DOC out to a virtual temperature of the DOC out to determine whether the combustion efficiency of the DOC is below a predetermined value.

The invention discloses a fuzzy control based air conditioner control method and device. The method comprises the following steps of: obtaining a target set temperature T set of an air conditioner and an external environment temperature T external of the air conditioner, and determining initial operation frequency F initial of a compressor of the air conditioner; obtaining an internal environment temperature T internal of the air conditioner, and calculating a difference value delta T between the internal environment temperature T interval of the air conditioner and the target set temperature T set of the air conditioner; judging whether a virtual temperature control condition is met or not according to the external environment temperature T external of the air conditioner; and if the virtual temperature control condition is not met, taking the difference value delta T as temperature difference between the internal environment temperature T internal of the air conditioner and the target set temperature T of the air conditioner, and regulating initial operation frequency F initial of the compressor of the air conditioner. The fuzzy control based air conditioner control method solves the problem that air conditioner fuzzy control in the prior art is not intelligent enough, and improves intelligent control of the air conditioner.

The invention relates to an ultralow-attenuation and large-effective-area single-mode optical fiber. The ultralow-attenuation and large-effective-area single-mode optical fiber comprises a core layer and covering layers, and is characterized in that the radius r1 of the core layer is 5mum to 8mum; the relative refractive index deltan1 of the core layer is 0 to 0.20 percent; an inner covering layer, a concave inner covering layer and an outer covering layer covers the core layer in sequence from outside to inside; the radius r2 of the inner covering layer is 8.5 to 12 mum and the relative refractive index deltan2 of the inner covering layer is smaller than or equal to 0.20 percent; the radius r3 of the concave inner covering layer is 12.5mum to 30mum and the relative refractive index deltan3 of the concave inner covering layer is smaller than or equal to 0.40 percent; the outer covering layer is a full fluorine-doped silicon dioxide glass layer and the relative refractive index deltan4 of the outer covering layer is smaller than or equal to 0.20 percent. By reasonably designing a waveguide structure and a material component of the core covering layer, viscosity matching and optical fiber stress of each part of the optical fiber are optimized, and an ultralow-attenuation performance of the single-mode optical fiber is realized. A fluorine-doped silicon dioxide outer covering layer structure is utilized, and material relaxation time of each part of an optical fiber material is changed, so that virtual temperature of the optical fiber is changed, an optical fiber section is simplified and stable control of optical fiber parameters is realized.

The invention discloses a temperature-based topological optimization method for comparing manufacturability constraint of connectivity. The method aims at considering the connectivity constraint in the material additive manufacturing process into a topological optimization model so as to realize the one-time manufacturing of topological optimization structures. According to the method, high-thermal conductivity self-heating materials are virtually added at the openings and holes, thermal insulation materials are virtually added in the structural areas, the borders are set as heat dissipation borders, and the connectivity constraint of the structures is equivalent to that the maximum temperature value of the structures under a virtual temperature field is less than a constant. The physical significance of the constraint is clear, the mathematical expression form of the constraint is simple and the sensitivity information of the constraint can be solved, so that beneficial effect is brought to the solution on the basis of a gradient optimization algorithm. Through considering the connectivity constraint of the structures in the topological optimization design, the occurrence of inner enclosed openings and holes in the topological optimum structures can be effectively avoided; and when the material additive manufacturing process is adopted, one-time moulding can be carried out, so that secondary processing is avoided.

The invention discloses a method for calibrating the temperature coefficient of an optical fiber gyroscope temperature control device based on least squares. Connect 3 groups of fixed resistance resistors to the temperature measurement circuit of the fiber optic gyro temperature control device respectively, and the fixed resistance value is used as the input signal of the temperature measurement circuit of the fiber optic gyro temperature control device to collect virtual temperature data, and remove the virtual temperature whose temperature value is not a constant value Data, use the least squares algorithm to fit the three sets of virtual temperature data respectively, and obtain the temperature coefficient when the fitting error index is satisfied, and finally use the fixed resistance value as the input of the temperature measurement circuit of the fiber optic gyro temperature control device for measurement, and compare with The standard temperature value corresponding to the fixed resistance resistor is compared. If the error is less than 0.03°C, the calibration is completed. Otherwise, the circuit board of the temperature control device needs to be checked and re-calibrated. The invention has the characteristics of simple operation and accurate calibration, thereby improving the temperature measurement accuracy of the optical fiber gyroscope.

The invention discloses an atmospheric optical turbulence intensity measurement, evaluation and correction method, and is applied to the technical field of atmospheric optical turbulence intensity measurement. The method comprises the following specific steps: sampling high-frequency sound imaginary temperature time series data in real time by adopting a high-precision ultrasonic anemograph, and preprocessing the sound imaginary temperature time series data, and obtaining atmospheric temperature time series data; converting two-point temperature difference of a time interval into space two-point temperature difference according to a preset sampling frequency value, a scale value of an inertia zone, statistical time and a wind speed average value in the statistical time, and measuring a temperature structure constant in real time by a single-point structure function method; and calculating a temperature structure constant value by a single-point spectrum method, and evaluating and correcting the temperature structure constant value obtained by the single-point structure function method from the value range of the spectrum power rate to obtain an accurate value of the temperature structure constant. A guarantee is provided for continuously obtaining accurate optical turbulence intensity for a long time all day long.

The invention discloses a new method for real-time measuring optical turbulent flow intensity by an ultrasonic anemometer, comprising: measuring sound virtual temperature by a high precision ultrasonic anemometer, correcting the sound virtual temperature to obtain temperature, under the Taylor assume, and converting temperature time sequence data measured at a space point into a temperature difference between two space points, to real-time measure the optical turbulent flow. The method overcomes disadvantages that a micro temperature probe is easy to be polluted because of elements like dust and strong wind in a using process of temperature fluctuation measurement, and has characteristics that the optical turbulent flow intensity can be unattendedly, long-time and continuously measured even under severe environments like sea atmosphere environment, high temperature environment, psychro-environment and windy weather.

The invention provides a virtual temperature sensor, a temperature measurement method, a motor over-temperature protection system and an automobile. The virtual temperature sensor is used for acquiring the temperature of a multi-phase winding of a motor, and comprises a plurality of winding temperature nodes arranged on phases of the winding correspondingly, a temperature test node arranged on a certain phase of the winding or an iron core of the motor, a motor cooling node arranged at the cooling position of the motor, and a plurality of equivalent thermal resistors arranged among the nodes;and the virtual temperature sensor calculates and obtains the temperature of each winding temperature node by using a thermal network method, and outputs the maximum value in the temperature of phasesof the winding as the temperature of the motor winding. The virtual temperature sensor can accurately output the highest temperature of the motor winding when the motor is in some special working conditions (such as a low-speed climbing working condition and a locked-rotor working condition) so that over-temperature protection can be timely carried out on the motor, and the influence of over-temperature of each phase of the winding on the service life of the motor is avoided.

A machine learning device includes a virtual temperature model calculating unit having an equation including a first coefficient for determining a heat generation amount and a second coefficient for determining a heat dissipation amount. The virtual temperature model calculating unit is configured to calculate virtual temperature data by estimating a temperature of a specific portion of a machine by the equation using heat generation factor data. A thermal displacement model calculating unit is configured to calculate, using the calculated virtual temperature data and actual temperature data acquired from at least one temperature sensor mounted to a portion other than the specific portion, an error between thermal displacement estimated by the equation and actually measured thermal displacement, in which the virtual temperature model calculating unit performs machine learning to search for the first coefficient and the second efficient so that the error is minimized.

The embodiment of the invention discloses a method for simulating a transient temperature field equation numerical value, and belongs to the petroleum and natural gas engineering temperature field numerical simulation technology, and solves the problems of large simulated temperature field calculation amount and low efficiency in the prior art. The method comprises the following steps of multiplying virtual temperature fields on two sides of a transient temperature field equation, and carrying out partial integration to obtain a variational form of the original transient temperature field equation; decomposing the solved temperature field u into a form containing time and space function product summation; substituting the separation form into a variational format, fixing a time domain, deducing an equation about X in a space domain, fixing the space domain, and deducing an equation about T in the time domain; solving the equation about X and the equation about T through an alternatingdirection iteration method, repeating the process to obtain the value of each Xm and the value of each Tm, multiplying and accumulating the Xm and the Tm, and outputting a temperature field u. The method is mainly used for simulating the numerical value of the transient temperature field equation.

A film coating system and a material deposition method are disclosed. The film coating system can accurately control deposition of a film material in a rigorous evaporation environment, avoids measuring or monitoring of temperature or the thickness of a film layer, and reduces the cost for film preparation. The film coating system can achieve a needed thickness of the film layer and guarantee the uniformity of the film layer. The material deposition method includes: putting an evaporation material into a crucible in a vacuum process chamber, heating the evaporation material in the crucible by controlling the output power of a heater controlled by a heater controller with the heater controller being based on a physical model and a virtual temperature sensor model, calculating a first temperature by the physical model, calculating a second temperature by the virtual temperature sensor model, adjusting the power of the heater based on the difference between the first temperature and the second temperature; generating film material steam, and depositing the film material onto a substrate by condensation of the film material steam on the substrate.

The invention provides a control device of an electric motor of the transverse machine tripod base sliding frame which can avoid reduced waving efficiency and the short service life caused by the heat even using the cheap electric motor with the load balance rating value by the usual motor under the maximum load weaving situation. In the stated time period, a torque monitor (14) monitors the load torque as the man electric motor (10). A temperature deducing circuit (16) calculates the temperature of the electric motor based on the average load torque of the monitoring result of the torque monitor (14). A protecting circuit (15) compares the virtual temperature to the predetermined allowed temperature. When the virtual temperature excesses the allowed temperature, the invention reduces the speed coefficient to 0.9 for the speed limitation. Under the condition that the virtual temperature is restored, the invention restores the speed coefficient to the original value 1.0.

The invention discloses a system and method for fast positioning the alarming position of a flash furnace. A three-dimensional model of the flash furnace and a three-dimensional monitoring module of the three-dimensional model are established, and XYZ coordinates of virtual temperature points corresponding to actual temperature points of the flash furnace one to one are marked on the three-dimensional model of the flash furnace; a database is established and data interaction between the database and the three-dimensional monitoring module as well as between the database and a PLC control module of the flash furnace is established; data of the actual temperature points of the flash furnace are read through the PLC control module and transmitted to the database to be collected, and real-time data, collected by the database, of the actual temperature points are read through the three-dimensional monitoring module and displayed on the virtual temperature points of the three-dimensional model of the flash furnace in a one-to-one correspondence mode; when a certain actual temperature point of the flash furnace breaks down, the corresponding virtual temperature point is visually displayed on the three-dimensional model through the three-dimensional monitoring module, and therefore the corresponding alarming position on the flash furnace can be fast positioned.

The invention relates to the technical field of thermal performance experiments, and discloses an experimental method for measuring an equivalent mixing coefficient of a rod bundle channel, which comprises the following steps of: building an experimental model; inserting a plurality of experiment rods into a cavity, the experiment rod dividing the cavity into a plurality of sub-channels which are communicated with one another; injecting water with the temperature of T1 into the cavity; injecting water with the temperature of T2 into the center of the cavity, T2 being greater than T1; measuring the temperatures in the sub-channels to obtain actual temperature values; taking n numbers in the range of 0-0.5 as virtual turbulence exchange coefficients; inputting the virtual turbulence exchange coefficients into a COBRA program, and calculating virtual temperature values corresponding to the virtual turbulence exchange coefficients by using the COBRA program; comparing the virtual temperature values with the actual temperature values, and defining the virtual temperature value closest to the actual temperature value as a determined temperature value; and determining a virtual turbulence exchange coefficient corresponding to the temperature value, namely the rod bundle channel mixing coefficient. According to the invention, the equivalent mixing coefficient of a rod bundle channel can be determined.

A cooler system includes a plurality of cooler units; a condensed water flow path, an aqueous medium in the condensed water flow path sequentially flowing through each of the cooler units; a cooling water flow path, an aqueous medium in the cooling water flow path sequentially flowing through each of the cooler units in a flow direction opposite to a flow direction of the aqueous medium in the condensed water flow path; a plurality of current sensors used for detecting working currents of the cooler units; water temperature sensors used for detecting an entering water temperature and a leaving water temperature of the cooling water flow path; at least one virtual temperature sensor arranged between the cooler units and used for acquiring a middle water temperature between the cooler units; and a controller.