96 results about "Temperature coefficient" patented technology

The invention relates to a temperature drift compensation method for a pressure instrument, and belongs to the technical field of pressure instruments, and the method comprises the following steps: obtaining output signal values of a pressure sensor at different temperature points, and building a temperature-output signal data set; constructing a polynomial fitting model as a temperature drift compensation model, fitting a temperature coefficient through a least square method, and storing the coefficient into an instrument memory; original values of temperature and pressure are collected in real time and substituted into the model to calculate a compensated pressure value. The method also supports various strategies such as temperature sensor calibration, nonlinear error compensation, Kalman filtering noise reduction, dynamic temperature change rate compensation and neural network compensation, and has self-calibration and remote updating functions. According to the invention, the measurement precision and stability of the pressure instrument in a variable-temperature environment are significantly improved, and the method is suitable for high-precision industrial measurement and intelligent monitoring scenes of the Internet of Things.

The invention provides a temperature distribution inversion method based on a multi-vertex grid and a high-robustness error functional, and the method comprises the steps: 1, obtaining a temperature gradient change rule of a measured structure under a typical thermal load condition, and determining a three-dimensional multi-vertex grid division scheme and a temperature sensor layout form of the measured structure; step 2, establishing an m vertex grid basis function model, and constructing a conversion matrix between a regular grid and an irregular grid; 3, establishing a high-robustness error functional between the theoretical temperature of the centroid position of each surface of the m-vertex grid and the actually measured temperature of the sensor; 4, a temperature matrix equation containing a temperature coefficient matrix and a temperature amplitude matrix is constructed, temperature vectors of all grid vertexes are solved, the m-vertex grid basis function model is combined, three-dimensional temperature distribution in the structure space is inverted, and according to the method, only few sensors need to be adopted, the global temperature response of the structure can be obtained, and the inversion precision is high; the method is simple, convenient and high in real-time performance.

Multiple degenerately-doped silicon layers are implemented within resonant structures to control multiple orders of temperature coefficients of frequency.

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.

The embodiment of the invention discloses a temperature compensation circuit. Wherein the first PTAT current generating circuit comprises a first resistor which is configured to output a first linear temperature compensation current with a first temperature coefficient; the second PTAT current generating circuit includes a second resistor configured to output a second linear temperature compensation current having a second temperature coefficient. The first temperature coefficient is different from the second temperature coefficient; and the resistance values of the first resistor and the second resistor are controlled to be equal to the current values of the first linear temperature compensation current and the second linear temperature compensation current at the set temperature. The comparison module is connected with the first PTAT current generation circuit and the second PTAT current generation circuit and is configured to compare the first linear temperature compensation current and the second linear temperature compensation current and output a comparison result. And the switching module is connected with the comparison module and is configured to output nonlinear temperature compensation current after changing the weighting proportion of the first linear temperature compensation current and the second linear temperature compensation current based on the comparison result.

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.

The invention relates to the technical field of bulk acoustic wave resonators, and particularly provides a bulk acoustic wave resonator and a preparation method thereof.The resonator comprises a first substrate, a coating type structure film layer, a bottom electrode, a piezoelectric layer and a top electrode which are sequentially connected from bottom to top, an acoustic reflector is arranged on the coating type structure film layer, a temperature compensation layer is arranged in the bottom electrode, and the piezoelectric layer is arranged on the top electrode; the temperature coefficients of the bottom electrode, the piezoelectric layer and the top electrode are all opposite to the temperature coefficient of the temperature compensation layer; the resonator can effectively restrain resonant frequency drift generated by the bottom electrode, the piezoelectric layer and the top electrode.

The application relates to the technical field of storage, in particular to a hard disk active heat dissipation intensity control method, device, equipment and storage medium. The method comprises the following steps: evaluating the current period business pressure of a hard disk to obtain a current period business pressure coefficient; predicting a first temperature change value based on the current period business pressure coefficient of the hard disk and a temperature coefficient of the hard disk; obtaining a plurality of actual temperature values measured by a plurality of temperature sensors of the hard disk, and calculating a composite temperature based on the plurality of actual temperature values and the temperature coefficient of each temperature sensor; calculating the difference between the composite temperature and a preset target temperature to obtain a second temperature change value; calculating a next period temperature change value based on the first temperature change value, the second temperature change value, the current period business pressure coefficient and a previous period business pressure coefficient; and adjusting the active heat dissipation intensity of the hard disk according to the next period temperature change value. The scheme can properly use the active heat dissipation, and ensures that the hard disk operates in an optimal state.

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 invention discloses a precision resistor structure with a temperature compensation function. The precision resistor structure comprises a resistor, an IC control chip and an MOS device. The resistor comprises two end electrodes and a first functional layer connected with the two end electrodes, and the first functional layer serves as a current detection unit; the temperature detection unit comprises two bottom electrodes and a second functional layer connected with the two bottom electrodes; and the current detection unit can generate heat and feed back the heat to the temperature detection unit through the substrate for heat conduction when being electrified. The temperature change of the temperature detection unit is fed back as the resistance change, the temperature change of the temperature detection unit can be calculated through the resistance change of the temperature detection unit, and the temperature of the current detection unit can be further fed back. When the temperature of the current detection unit can be detected in real time, an input signal of the current detection unit can be adjusted in real time in combination with a resistance temperature coefficient of the current detection unit, the stability of a circuit communicated with the current detection unit is ensured, and then the stability of a signal in a protected unit circuit is ensured.

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 application relates to a multifunctional testing device and testing method for a servo electric cylinder, and belongs to the technical field of device testing. The device comprises a device body, a control module and a sensing module. The device body is used for collecting the actual output thrust of an electric cylinder to be tested, and the device body corrects the PID coefficient of the electric cylinder to be tested under the instruction of the control module. The sensing module comprises a temperature sensor, the temperature sensor is used for monitoring the current ambient temperature w and uploading the ambient temperature w to the control module. The control module is pre-inputted with a plurality of groups of temperature coefficients containing kn and bn. After receiving the temperature data w, the control module selects kn and bn according to the temperature w. The control module corrects the Kp in the PID coefficient of the electric cylinder to be tested to the original A1 times, wherein A1 = kn x w + bn, kn and bn are the temperature coefficients selected by the control module, and n is a natural number. The device has the characteristics of considering the influence of environmental factors and accurate testing results.

The invention belongs to the technical field of nuclear power, and particularly relates to a nuclear reactor core isothermal temperature coefficient estimation method and device, a computer readable storage medium, electronic equipment and a computer program product. The method comprises the following steps: acquiring isothermal temperature coefficient measurement data of a nuclear reactor core; segmenting the isothermal temperature coefficient measurement data to obtain data of each segment; performing linear fitting on each piece of segmented data to obtain a fitting slope of each piece of segmented data; and determining an isothermal temperature coefficient estimation result of the nuclear reactor core according to the fitting slope of each piece of segmented data. According to the method and the device, the isothermal temperature coefficient measurement data are not used as a whole for simple linear fitting any more, the isothermal temperature coefficient measurement data are segmented, linear fitting is respectively carried out on each segmented data, and then the fitting slope of each segmented data is comprehensively considered to determine the final isothermal temperature coefficient estimation result. Therefore, the precision of the estimation result is effectively improved.

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.

The present application relates to the field of power equipment maintenance, and more particularly to a live working complete tool and a line clamp oxidation degree detection method, comprising obtaining contact resistance original data and environmental temperature data of the line clamp in live working; adopting four-wire method to exclude wire resistance interference and calculate the original contact resistance value of the line clamp; based on the temperature coefficient of copper material and the influence coefficient of oxide layer, temperature compensation correction is performed on the original resistance value to obtain the actual contact resistance value; according to the actual contact resistance value and the wear trend, the oxidation grade of the line clamp is dynamically determined and the maintenance threshold is adjusted. After obtaining the contact resistance original data and environmental temperature data of the line clamp, the four-wire method is used to exclude wire resistance interference to preliminarily calculate the original contact resistance value of the line clamp, and then the temperature compensation correction is performed on the original resistance value to obtain the actual contact resistance value, so as to dynamically determine the oxidation grade of the line clamp and adjust the maintenance threshold according to the actual contact resistance value and the wear trend.

The invention provides an indexing calibration method for a negative temperature coefficient thermistor temperature sensor, and the method comprises the steps: building a mathematical model of a reference polynomial of a reference coefficient fixed value based on a plurality of high-stability reference NTC thermistors; determining the weight coefficient of each thermometer in the reference coefficient fixed value according to the reciprocal ratio of the maximum temperature drift amount corresponding to the water three-phase point resistance value of each thermometer; and establishing a quadratic polynomial function relationship between the deviation value of the resistance natural logarithm ratio of the detected NTC thermistor and the reference NTC thermistor and the resistance natural logarithm ratio of the detected NTC thermistor, thereby constructing a novel indexing calibration mathematical model of the NTC thermistor. The mathematical model has universality and can be suitable for various types of NTC thermistors.

The embodiment of the invention discloses a TSV-based three-dimensional distribution temperature sensor and a temperature detection method, which can realize accurate detection of the internal temperature of a three-dimensional integrated chip and improve the device utilization rate of the three-dimensional integrated chip. Differential voltage measurement is carried out on the two TSV temperature sensing units by using the differential reading circuit, so that a differential detection framework is realized, and the temperature detection precision can be improved; the TSV temperature sensing unit formed by connecting a plurality of TSVs in series has good temperature sensitivity, a detectable minimum temperature change signal can be improved, an effective value of a resistance temperature coefficient can be increased, a TSV-based three-dimensional distribution temperature sensor is used for executing a temperature detection method for a three-dimensional integrated chip, and the sensitivity of temperature measurement can be remarkably improved; therefore, high-precision and high-sensitivity temperature monitoring can be realized, and the method is suitable for real-time response and adjustment of a complex thermal management environment. The method is widely applied to the technical field of chip heat management.

A plurality of resistors are disclosed herein. The resistor may include one or more resistive elements and a plurality of conductive portions. Openings or slots, which can be configured to adjust temperature coefficient or resistance (TCR) values of the resistor, are formed in the resistive elements. The shape, quantity, and orientation of the openings or slots can vary. In one aspect, header assemblies are provided for securing or holding pins relative to the resistors.

The invention provides a temperature adjusting method and device of a crystal furnace, electronic equipment and a storage medium. The temperature adjusting method comprises the steps that whether the surface temperature of a material in a crucible of the crystal furnace is within a preset temperature range or not is determined; if the surface temperature is not within the preset temperature range, controlling the crystal furnace crucible to rotate at a first preset rotating speed, determining first target power of a crystal furnace heater based on a first temperature coefficient corresponding to the surface temperature, and controlling the crystal furnace heater to operate at the first target power; if the surface temperature is within the preset temperature range, controlling the crystal furnace crucible to rotate at a second preset rotating speed; and after the crystal furnace crucible is controlled to rotate at a second preset rotating speed, determining second target power of the crystal furnace heater based on a second temperature coefficient corresponding to the surface temperature, and controlling the crystal furnace heater to operate at the second target power. By adopting the technical scheme provided by the invention, the temperature adjusting time of the crystal furnace is shortened, the production efficiency and the quality of products are improved, and the production cost and the energy consumption are reduced.

The present application relates to the technical field of resonators, and discloses an array structure-based resonator and a temperature measurement method. A vibration unit comprises at least two substructures and a fixing anchor point connected to a substrate; a reference plane is formed for the vibration unit; an in-plane electrode is located in the reference plane; an out-of-plane electrode is located outside the reference plane; the in-plane electrode drives the substructures to vibrate at a first frequency; the out-of-plane electrode is located above and / or below the substructures, and drives the substructures to vibrate at a second frequency; each substructure has a first temperature coefficient of frequency at the first frequency in an in-plane mode; and the substructure has a second temperature coefficient of frequency at the second frequency in an out-of-plane mode. In the array structure-based dual-mode resonator of the present application, the temperature of the resonator is represented on the basis of temperature coefficients of frequency, thereby improving the temperature measurement accuracy of the resonator.