49 results about "Temperature coefficient" patented technology

The invention provides a temperature sensor and a temperature detection method. The temperature sensor comprises a temperature sensing module, a current frequency conversion module and a counting module. The temperature sensing module comprises a first P-type MOSFET, a second P-type MOSFET and a bias unit, the source end of the first P-type MOSFET is connected to power supply voltage, and the gate end and the drain end of the first P-type MOSFET are in short circuit; the source end of the second P-type MOSFET is connected to the power supply voltage, and the gate end and the drain end of the second P-type MOSFET are in short circuit; the bias unit is used for providing bias current, so that the first P-type MOSFET and the second P-type MOSFET respectively generate first temperature sensing current and second temperature sensing current which are related to temperature and have different temperature coefficients under the action of the bias current; the current frequency conversion module is used for converting the first temperature-sensing current and the second temperature-sensing current into a first clock signal and a second clock signal after mirror image duplication is carried out on the first temperature-sensing current and the second temperature-sensing current respectively; the counting module is used for counting the first clock signal and the second clock signal and reading temperature data.

The invention discloses a telescope main reflection surface shape real-time evaluation and on-demand adjustment integration method. An adjustment reference attitude and a reference temperature field are used as error zero points, and the whole process is calculated based on relative quantity. A gravity deformation database, a three-dimensional Chebyshev (or Legendre) temperature basis function unit response deformation database and a temperature control actuator unit temperature change influence matrix database are established offline. Regular least square fitting is performed on temperature sensor data on line to obtain a temperature coefficient, linear combination is performed to obtain relative displacement caused by temperature, the relative displacement and relative displacement caused by gravity are superposed to form relative node coordinates, and a reference surface is fitted to output a surface shape relative RMS. And solving quadratic programming based on first-order linearization under temperature upper and lower limits and smoothness constraint to obtain an actuator temperature increment instruction, and issuing the actuator temperature increment instruction, thereby realizing closed-loop compensation without online thermal-structural coupling and absolute morphology measurement.

A positive temperature coefficient (PTC) heater apparatus is provided. The PTC heater apparatus includes a PTC heater, a resistance temperature detector (RTD) sensor mounted to the PTC heater and a controller logic unit electrically connected to the RTD sensor to receive readings of the RTD sensor, which, when the PTC heater is powered on, indicate whether the PTC heater is faulty.

A system and method provide on-line, wafer-level, die-level, or package-level thermal calibration of an integrated measurement resistor with a single temperature insertion. The system includes a measurement resistor integrated on a substrate with an unknown temperature coefficient and a temperature reference sensor thermally coupled to the measurement resistor. A measurement circuit measures an indication of a resistance of the measurement resistor. An electrically-controllable integrated heat source is operated by a controller to change a temperature of the measurement resistor and the temperature reference sensor and stores values of the resistance indication and the sensed temperature corresponding to multiple temperatures of the temperature of the measurement resistor and the temperature reference sensor. The controller generates or approximates a mathematical relationship between the resistance of the measurement resistor and the temperature of the measurement resistor and the temperature reference sensor from the stored values.

This invention provides a method, apparatus, and system for multi-point temperature correction of an array induction logging tool. The method includes: acquiring measurement signals from the array induction logging tool during temperature changes, the measurement signals being detected by a preset number of temperature sensors; constructing a temperature coefficient matrix for each temperature sensor based on the measurement signal, resulting in a preset number of temperature coefficient matrices; calculating a temperature correction coefficient matrix based on each temperature coefficient matrix; acquiring actual measurement signals from the array induction logging tool downhole, and performing temperature correction on the measured signals based on the temperature correction coefficient matrix. The multi-point temperature correction method for an array induction logging tool provided by this invention can calculate the temperature correction coefficient matrix based on the actual measurement signals and correct the measured signals based on the temperature correction coefficient matrix, thus avoiding errors caused by formation temperature changes and improving the accuracy and reliability of the array induction logging tool.

This invention discloses a temperature measuring device and an aerosol generating apparatus, comprising a magnetic field generator, a heating component, and a PCB board. The magnetic field generator generates a changing magnetic field; the heating component is partially disposed within the magnetic field and in contact with the aerosol substrate; the PCB board is connected to both the magnetic field generator and the heating component. The heating component generates heat under the influence of the magnetic field to heat the aerosol substrate. The heating component has a positive or negative temperature coefficient of resistance, and the PCB board determines the temperature of the heating component based on its resistance value when heated. This invention employs a temperature measuring device with a positive or negative temperature coefficient of resistance, i.e., directly measuring the resistance of the heating component and determining its temperature based on its temperature coefficient of resistance. This method yields higher temperature accuracy, and the overall structure of the temperature measuring device is simpler and more integrated, thereby reducing product size and production costs.

The application discloses a cable life prediction method based on an improved electromagnetic-thermal field coupling model, and comprises the following steps: firstly, a temperature coefficient and a proportional coefficient are used to respectively establish an insulation material thermal conductivity coefficient and temperature relationship and a convection heat transfer coefficient and temperature relationship, and the two relationships are used together with a conductor resistivity and temperature relationship as an electromagnetic-thermal field coupling relationship, thereby forming an improved electromagnetic-thermal field coupling model; then, a chaotic grey wolf optimization algorithm is used to identify the optimal temperature coefficient and the proportional coefficient of the insulation material in the improved electromagnetic-thermal field coupling model, and on this basis, the conductor temperature is calculated; finally, a multivariate linear regression is used to establish a conductor temperature analytical model, and an Arrhenius model is used to establish a cable life analytical model. The application solves the problem of large error of a traditional electromagnetic-thermal field coupling calculation method under a high temperature operation condition of a cable, and realizes online prediction of the cable life.

The application provides a distributed rotary scanning probe structure parameter calibration method, and relates to the field of precise optical measurement instrument calibration, and specifically comprises the following steps: establishing a measurement model of a rotary scanning probe; placing a temperature sensor at a heat generating part in a distance measuring system, recording the change relationship between the distance measuring value and the temperature in the stationary working state of the rotary scanning probe, and calibrating the temperature coefficient; performing temperature compensation on the original distance measuring value to obtain a compensated distance measuring value; according to the internal structure of the rotary scanning probe, an initial calibration value is given, point cloud data is subjected to least square ellipse fitting processing, and a fitted radius value is obtained; the fitted radius value of each group of point cloud data is compared with the true circle radius, a PSO-LM hybrid algorithm is used for iteration, and the optimal calibrated structure parameter is obtained. The technical scheme of the application overcomes the problems of the prior art, such as complicated operation, poor fault tolerance and unsuitability for rapid calibration requirements in the production site.

The utility model relates to oil field casing drilling, in particular to a sensor for casing screwing-on measurement, and aims to solve the problem that the error correction result is inaccurate due to the temperature difference between the placement position of a temperature sensor and the patch position of a strain gauge and the self measurement error of the temperature sensor. According to the utility model, through the arrangement of the PCB groove, the radio frequency antenna groove and the battery hole, the number of turns of thread rotation in the threaded connection process of casing drilling equipment and the torque generated during thread matching can be monitored at the same time, and the quality of threaded connection between equipment can be ensured more effectively. And the design of a Wheatstone bridge temperature compensation circuit can be completed according to the sensitivity of the negative temperature coefficient of the strain gauge and the resistance change of the positive temperature coefficient. Through the feedback mechanism of the compensation circuit, the reduction of the output voltage of the strain gauge Wheatstone bridge circuit caused by the temperature can be effectively compensated.

This application relates to a resistance temperature coefficient testing device, comprising: a controller; a temperature control stage assembly electrically connected to the controller, the temperature control stage assembly being used to place a sample to be tested, allowing the sample to be subjected to multiple different temperature environments; a temperature testing element for detecting the temperature value at the location where the sample is placed on the temperature control stage assembly; a resistance detection structure including a clamping assembly and at least one pair of probes, the clamping assembly clamping the sample to the temperature control stage assembly, and the probes simultaneously contacting the sample to form a detection circuit to detect the resistance value of the sample; the clamping assembly including a mounting plate having multiple equally spaced mounting holes, into which the probes are inserted. This device can solve the problem of the inability to quantitatively control the probe spacing during repeated testing, improving testing accuracy; in addition, the multiple equally spaced mounting holes on the mounting plate can simultaneously fix multiple pairs of probes, enabling simultaneous testing at multiple sites and improving testing efficiency.

The application discloses a simple and high-precision constant-temperature tank based on logarithmic operation, wherein a detecting element and a heating element are R1 and R2, R1, R2, R3 and R4 constitute a measuring bridge, P1 is used for adjusting the ratio of R3 and R4, the voltage of two opposite diagonal points A-B of the bridge enters operational amplifiers A1 and A2, A1 and A2 are in-phase outputs, and two diodes are connected to two opposite-phase terminals for correcting the nonlinearity of the temperature coefficient of the heating element, so that A1 and A2 each constitute a logarithmic amplifier with the diodes, the outputs of A1 and A2 control transistors TR3 and TR4 respectively, and then control the adjusting tubes TR1 and TR2 of a constant-current voltage stabilizer, the voltage Eo between the emitters of TR1 and TR2 is always kept unchanged, the current io passing through the bridge is also supplied by a constant-current source, and the constant-temperature tank dynamically maintains constant temperature.

The invention discloses a hierarchical alignment method and system for a multi-modal perception data set of a soft manipulator, and the method achieves the coverage of a whole process from data quality evaluation to feature space alignment to semantic consistency optimization through the three-stage design of single-modal noise evaluation, feature-level adaptive alignment and semantic-level constraint alignment. The limitation that a traditional method only pays attention to single-level alignment is broken through, and the model can gradually adapt to the complex characteristics of touch multi-mode perception. Secondly, an adaptive temperature function is designed based on modal pair comprehensive reliability, and a strict monotone mapping relation between temperature coefficients and modal noise characteristics is established, so that a high-noise modal pair automatically obtains a relatively large temperature coefficient to enhance robustness, and a low-noise modal pair automatically obtains a relatively small temperature coefficient to improve alignment precision; the technical problem that the fixed temperature coefficient cannot adapt to the touch multi-mode heterogeneous noise characteristic is fundamentally solved, and end-to-end sensitivity adjustment is achieved through the global learnable self-adaptive adjustment coefficient.

The invention discloses a temperature coefficient compensation method and system for a deflection angle sensor, and relates to the technical field of automatic driving of agricultural machinery, and the method comprises the steps: fitting a relation between a temperature drift value of the deflection angle sensor and temperature through a polynomial based on temperature-drift relation data; based on the temperature sensor value, a Kalman filtering algorithm is adopted to estimate a temperature true value; calculating a temperature variation according to the temperature true value and the temperature sensor value, and if the absolute value of the temperature variation is greater than or equal to the temperature variation threshold value, calculating a deflection angle sensor compensation value based on a polynomial; and continuously compensating the deflection angle sensor based on the deflection angle sensor compensation value. According to the invention, the stability and accuracy of temperature compensation in a complex environment are guaranteed.

The invention discloses a high-temperature-resistant weighing sensor with a self-calibration function, relates to the technical field of weighing sensors, and aims to solve the technical problem of measurement misalignment caused by thermal drift and sensitivity attenuation of a traditional sensor in a high-temperature environment, and the high-temperature-resistant weighing sensor comprises a sensing module, a self-calibration execution module and a signal processing and control module. By means of a real-time temperature compensation algorithm based on multi-parameter fusion, an accurate compensation model is established for the problems of zero drift and sensitivity drift in a high-temperature environment. Non-linear zero drift is corrected through a piecewise polynomial fitting function, meanwhile, the change of sensitivity along with temperature is adjusted through a temperature coefficient correction function, dynamic compensation in a full working temperature range is achieved, it is ensured that the sensor can still keep stable measurement precision in a high-temperature environment, and the measurement accuracy of the sensor is improved. The problem of measurement misalignment caused by thermal drift and sensitivity attenuation of a traditional sensor in a high-temperature environment is solved.

The application provides an oscillator-based temperature sensor and a sensor assembly. The temperature sensor comprises: a first oscillator generating a first clock signal of a first frequency, an absolute value of a temperature coefficient of the first clock signal being greater than or equal to a first predetermined value; a second oscillator generating a second clock signal of a second frequency, the second frequency being higher than the first frequency, an absolute value of a temperature coefficient of the second clock signal being less than a second predetermined value; a counting and control unit timing based on the first clock signal to obtain a predetermined time length; a counter counting the second clock signal to obtain and output a count value within the predetermined time length; and a calculation unit calculating a current digital temperature value according to a calibration count value output by the counter at a predetermined calibration temperature, a measurement count value output at a current temperature, and a linearly fitted temperature coefficient.

This invention specifically relates to a method for correcting the critical boron concentration under full power conditions. Based on a three-dimensional reactive equilibrium equation and considering the influence of temperature deviation on the Doppler effect, the critical boron concentration under full power conditions is: where CB ref This represents the critical boron concentration at full power; CB m ρ represents the actual boron concentration under the measured conditions. xem Indicates the equilibrium xenon poisoning under measurement conditions; ρ xeref This represents the balanced xenon poisoning at full power; ρ rccam Indicates the reactivity introduced by the control rod under measurement conditions; pr m Indicates the actual power under the measured conditions; HFP represents full power; α pc α represents the average of the sum of the power coefficients under the measured state and the full-power state; b T represents the average of the sum of the differential boron values ​​under the measured state and the full-power state; avgm T represents the average temperature of the moderator under the measured conditions. ref (pr m ) represents the moderator reference temperature under measurement conditions; α ttcm This represents the total temperature coefficient under the measurement conditions. The invention also relates to computer equipment and a computer-readable storage medium, outlining the steps for implementing the above-described method for correcting the critical boron concentration under full power conditions. Based on a three-dimensional reactive equilibrium equation, and considering the influence of temperature deviation on the Doppler effect, this invention achieves accurate correction of the critical boron concentration under full power conditions when nuclear power units increasingly participate in peak shaving.

The present disclosure provides a method, system and device for improving the accuracy of the frequency of an excitation control system, the method comprising: presetting an initial frequency maximum value and an initial duty cycle maximum value of the excitation control system; obtaining a maximum duty cycle output when the locomotive is under a self-load full load test; obtaining a temperature coefficient conversion value of the excitation winding in the excitation control system; determining a duty cycle maximum value in use according to the maximum duty cycle and the temperature coefficient conversion value; obtaining a duty cycle output in use of the excitation control system; and calculating a control frequency output by the excitation control system according to the duty cycle maximum value in use, the duty cycle output in use and the initial frequency maximum value. The method, system and device provided by the present disclosure optimize the duty cycle of the excitation system, ensure the output accuracy of the frequency, further improve the accuracy of the output voltage, and ensure the stability and reliability of the output signal.

The invention discloses a temperature coefficient-nonlinearity joint compensation method of an I / F conversion circuit, and solves the problem that the compensation precision of the I / F conversion circuit is relatively low because the temperature coefficient compensation and the nonlinearity compensation of the traditional I / F conversion circuit are independently completed and the nonlinearity in a full temperature range and the temperature coefficient index in a full range cannot be considered at the same time. Temperature coefficient compensation and non-linearity compensation are effectively combined, the non-linearity of the circuit at each temperature point in the full-temperature range can be reduced, the temperature coefficient of the circuit working at any current point in the full range is reduced, and the requirements of different working environments for the precision of the full range and the full-temperature range of the I / F conversion circuit are met.

The invention relates to the technical field of bulk acoustic wave resonators, and particularly provides a bulk acoustic wave resonator integrated with a double-layer temperature compensation structure and a preparation method thereof.The resonator comprises a first substrate, a bonding layer, a bottom electrode, a piezoelectric layer, a second temperature compensation layer and a top electrode which are sequentially connected from bottom to top, and the first substrate is provided with an air cavity; a first temperature compensation layer is wrapped in the bottom electrode, the boundary of the projection of the first temperature compensation layer in the overlook direction is located in the boundary of the projection of the air cavity in the overlook direction, and the temperature coefficients of the bottom electrode, the piezoelectric layer and the top electrode are all opposite to the temperature coefficients of the first temperature compensation layer and the second temperature compensation layer; the resonator can effectively avoid the conditions that the piezoelectric layer needs to be directly formed on the temperature compensation layer, and lattice mismatch exists between the temperature compensation layer and the piezoelectric layer, so that the crystal quality of the piezoelectric layer is poor, and leakage current is increased.

The utility model relates to the technical field of atomization devices, in particular to an aerosol generating device and a heating needle assembly thereof. As the heating needle of the heating needle assembly is provided with the temperature measurement heat conduction layer, heat of the insertion section can be conducted to the external section through the temperature measurement heat conduction layer, the temperature of the temperature measurement heat conduction layer is measured through the temperature measurement piece, and the temperature of the insertion section on the heating needle is obtained according to the temperature of the temperature measurement heat conduction layer. According to the heating element assembly, the temperature measurement heat conduction layer is connected with the temperature measurement element, the heat of the insertion section is transmitted to the temperature measurement element through the temperature measurement heat conduction layer, measurement of the temperature of the insertion section is achieved, and the measurement mode is not affected by the resistance temperature coefficient. Besides, the temperature measuring piece is connected with the external section part, so that the external section is positioned outside the aerosol generating rod during use and is not easy to corrode, and the connection reliability of the external section part and the temperature measuring piece is better.

The invention relates to the technical field of robot control, and discloses a robot finger joint control method and system, and the method comprises the steps: executing multi-physical field signal collection, injecting high-frequency excitation into a driving voltage, and extracting a current response; analyzing the resistance value by using high-frequency response, calculating the real-time temperature of the coil in combination with a heat conduction model, and reconstructing the effective flux linkage of the permanent magnet according to a temperature coefficient; generating a self-adaptive flutter signal of which the amplitude and the frequency are dynamically mapped along with the thermal state according to the lubricating viscosity characteristic mapped by the temperature and in combination with the real-time rotating speed; and correcting the torque conversion coefficient based on the effective flux linkage, superposing the flutter signal to a current loop, and generating a target current instruction to drive the motor. By constructing a sensorless thermomagnetic observation mechanism and a thermal viscosity coupling compensation strategy, the problems of thermal parameter drift and friction nonlinearity of the miniature joint caused by space limitation are effectively solved, and high-precision torque output and low-noise stable operation under the full-temperature-range working condition are guaranteed.

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 relates to a terminal contact state diagnosis method of a multi-loop intelligent electric meter. The method comprises the following steps: acquiring a first temperature value output by a contact area temperature sensor on each terminal seat and a second temperature value output by a reference area temperature sensor on each terminal seat; calculating a difference value between the first temperature value and the second temperature value to obtain a temperature gradient value; obtaining a current sampling value of each loop, and obtaining a normalized temperature coefficient based on the temperature gradient value and the current sampling value; forming a sample set by the normalized temperature coefficients at the same function position in the plurality of loops, calculating a statistical characteristic quantity, and detecting whether the sample set presents a systematic deviation mode related to the physical arrangement position of the terminal block or not, so as to apply compensation correction to the temperature gradient value and recalculate the temperature gradient value; and comparing the normalized temperature coefficient with the statistical characteristic quantity, and if the deviation exceeds a deviation threshold value, marking the corresponding terminal seat as a contact abnormal state. According to the invention, environmental interference and thermal crosstalk are eliminated through double temperature measurement point gradient difference, and terminal fault self-diagnosis without external reference is realized.

This invention discloses a simple LDO circuit with temperature coefficient compensation, comprising a startup circuit, a bias circuit, a temperature compensation circuit, and an LDO circuit. The startup circuit assists in the normal startup of the entire circuit upon power-up. The bias circuit, located secondary to the startup circuit, provides bias current to the subsequent LDO circuit. The temperature compensation circuit provides a reference voltage with a positive temperature coefficient to the subsequent LDO circuit. The LDO circuit, under the correction of the reference voltage provided by the temperature compensation circuit, outputs a stable output voltage independent of temperature fluctuations. The startup circuit, bias circuit, temperature compensation circuit, and LDO circuit are all connected to power supply VDD25. This invention adds a positive temperature coefficient compensation circuit, generating a reference voltage with a positive temperature coefficient, which is provided to the source follower at the output of the LDO circuit. The sum of the two voltages with positive and negative temperature coefficients compensates for the influence of temperature changes on the V12 output, thereby reducing the temperature coefficient.

A temperature error detection method, device and equipment of a temperature sensor based on a bandgap reference circuit and a storage medium. The temperature error detection method comprises: obtaining a temperature sensing circuit model parameter; obtaining a temperature coefficient simulation curve based on the temperature sensing circuit model parameter; obtaining a first parameter and a second parameter from the temperature coefficient simulation curve; obtaining a first-order standard curve based on the first parameter and the second parameter; and obtaining a temperature error based on the temperature coefficient simulation curve and the first-order standard curve. The temperature error detection method obtains a first-order standard curve based on a temperature coefficient simulation curve obtained by simulating a temperature sensing circuit, without the need for complex multi-order calculation, thereby reducing the calculation complexity, saving the calculation cost, and improving the calculation efficiency.

The present application relates to the technical field of computing power scheduling, in particular to a dynamic computing power scheduling method and system for AI training tasks, which realizes the quantification of node thermal risk by obtaining the thermal state pressure index through the weighted calculation of thermal margin and temperature rise trend; obtains the static leakage power consumption from the total power consumption by stripping the dynamic power consumption, obtains the electrical state pressure index by combining the leakage temperature coefficient, and accurately identifies the risk of node thermal-electric positive and negative feedback instability; captures the implicit collapse problem of long-term performance of the node by calculating the deviation accumulation state through the exponential moving average; calculates the expected cooling time based on the heat capacity, cooling heat dissipation rate and idle power consumption, locks the scheduling state through the time lock mechanism, and offsets the influence caused by the inertia of the cooling system; realizes multi-dimensional risk warning, and the warning dimension is more comprehensive and the prediction accuracy is higher; calculates the computing power loss factor through the thermal and electrical pressure index, corrects the nominal computing power to obtain the effective available throughput, so that the scheduling and distribution of the AI training operator are more suitable for the real running state of the node.

This disclosure provides a temperature sensor and a temperature calibration method, which can be applied in the field of sensing technology. The method includes: a temperature sensing circuit for determining a nonlinear parameter based on a third adjustable parameter and a temperature coefficient based on a first adjustable parameter; a signal conditioning circuit for determining a zero-degree output parameter based on a second adjustable parameter; and a temperature sensor for determining a calibration output curve based on the nonlinear parameter, the temperature coefficient, and the zero-degree output parameter; wherein the second and third adjustable parameter signals are parameters of the signal conditioning circuit, the first adjustable parameter is a parameter of the temperature sensing circuit, and the calibration output curve is an output curve that is linearly related to temperature.

This invention belongs to the field of sensor technology and discloses a testing method for a resistance temperature sensor (RTS). The method includes: testing reference temperatures T1 and T2 of a liquid medium in a static state and determining the fluctuation of the liquid medium; independently testing the RTS under the reference temperatures T1 and T2 in the liquid medium, and correcting the reference temperature measurement value T. 标 ; Change the direction of the driving current and repeat the previous step; calculate the resistance values ​​ΔR1, ΔR2 and the resistance fluctuation values ​​ΔΔR1, ΔΔR2 of the RTD temperature sensor; determine the RTD temperature sensor grade and whether retesting is required. This invention improves the testing efficiency of platinum resistance thermometers in engineering applications by correcting the measured values ​​of the RTD temperature sensor at a reference temperature, calculating the resistance temperature coefficient, and determining the RTD temperature sensor grade.