15 results about "Radiation temperature" patented technology

The invention relates to the technical field of sugarcane spica monitoring, and discloses a sugarcane spica flowering intelligent monitoring system, which is characterized in that a hyperspectral image and an infrared image are acquired, the hyperspectral image and the infrared image are acquired and registered into a multi-source image data set, and a spica area binary mask image is segmented; extracting morphological structure characteristics, spectral reflection characteristics and thermal radiation characteristics, calculating a visibility index KJ, a wave band reflectivity BS and a radiation temperature value FP based on the extracted characteristics, calculating a determination value P, and comparing the determination value P with a hybridization threshold ZY; according to the method, the hyperspectral image and the infrared image of the sugarcane spica are collected, the hyperspectral image obtains the fine spectral reflection characteristics of the sugarcane spica so as to analyze the physiological state of the sugarcane spica, and the infrared image is used for assisting in obtaining the overall shape, contour and thermal radiation information of the spica, and especially, the image characteristics are enhanced in a weak light environment; therefore, the sugarcane spica area can be accurately identified, and the effective distinguishing between the spica and the background can be realized.

This invention provides a liquid metal homogenizing blackbody furnace based on induction heating, belonging to the technical field of infrared radiation temperature measurement equipment. It includes a coaxial graphite tube, liquid metal, insulation material, a water-cooled coil, a temperature measuring device, and a high-frequency power control module. The coaxial graphite tube consists of an inner and outer graphite tube, forming an annular gap between them. The inner cavity of the inner graphite tube constitutes the blackbody cavity. The liquid metal fills the annular gap, generating eddy current heat under an alternating magnetic field. The insulation material covers the outer graphite tube. The water-cooled coil is wound around the outside of the insulation material. The temperature measuring device is attached to the wall of the coaxial graphite tube. The high-frequency power control module is electrically connected to the water-cooled coil to provide high-frequency current, causing it to generate an alternating magnetic field. This invention achieves high spatial temperature uniformity and long-term operational stability of the blackbody radiation cavity wall at high temperatures without relying on precise coil arrangement or mechanical motion compensation.

The application discloses a kind of spectral modulation radiation temperature measuring device and method, belongs to optical radiation temperature measuring technical field.For the problems, such as limited spectral channel, difficult to realize single-exposure multi-channel synchronous acquisition, temperature measuring stability and insufficient inversion robustness of existing radiation temperature measuring technology under long-distance, high dynamic and complex background conditions, the present application sets up wide-spectrum modulation optical window at the incident end, and combines wide-spectrum modulation multi-modal spectral chip, to synchronously acquire multi-channel wide-spectrum modulation radiation image under single exposure;Pretreatment is carried out using system on chip, and wide-spectrum modulation response model, emissivity spectral basis expansion model and time domain regularization are fused in temperature inversion calculation platform, to realize stable inversion of real temperature field, emissivity distribution and temperature rising sequence, suitable for non-contact temperature measurement in long-distance high-temperature target and other fields.

This invention provides a method for calculating segmented discontinuous solar radiation temperature gradients in enclosed stacked aqueducts, relating to the field of aqueduct technology. The method divides the inner cavity of the enclosed stacked aqueduct into a gas-phase coupled heat transfer zone, a gas-liquid phase interface zone, and a fluid heat source anchoring zone based on water level height, constructing a thermo-solid coupled heat transfer model that distinguishes the properties of the media. Through this partitioning, the heat exchange characteristics of different regions can be accurately matched, establishing a segmented discontinuous solar radiation temperature gradient kernel function along the height coordinate. Based on the thermo-solid coupled heat transfer model that distinguishes the properties of the media, the discontinuous solar radiation temperature gradient kernel function is used as a boundary driving source, substituted into the transient nonlinear heat conduction partial differential equation for iterative solution, outputting a discontinuous solar radiation temperature gradient curve containing abrupt step characteristics at the water surface line. This method solves the problem of inaccurate calculation of solar radiation temperature gradients in enclosed stacked aqueducts and is applicable to the calculation of solar radiation temperature gradients in enclosed stacked aqueducts.

This invention provides a method and system for multispectral temperature measurement based on an infrared sensor. The method includes: calculating the optical parameters of a microlens array and a filter array according to optical formulas; then fabricating the microlens array through photolithography, development, pressing, and atomic force scanning; next, constructing an infrared multispectral radiation temperature measurement system; calibrating the system using a blackbody furnace to obtain the correspondence between the camera output signal intensity and the standard temperature; decoupling the multispectral light field image based on the imaging characteristics of the light field camera; and finally, using the decoupled data to sequentially calculate the true temperature of points on the high-temperature component, obtaining the two-dimensional true temperature field of the high-temperature component. This invention overcomes the limitations of visible light multispectral temperature measurement by combining multispectral light field measurement with infrared imaging technology to achieve two-dimensional temperature field measurement, effectively overcoming the shortcomings of existing optical temperature measurement systems, such as complex structure and inability to simultaneously achieve both high measurement accuracy and wide range.

The application discloses a temperature control method and device of a semiconductor device, equipment and a storage medium, and relates to the technical field of temperature control, and comprises the following steps: based on the slit cavity observation band brightness of the edge infrared observation annular area of a rapid thermal processing furnace and the surface emissivity of a wafer, the equivalent radiation temperature of the slit cavity observation band brightness is calculated; the equivalent temperature of the inner edge of a quartz bell jar is solved; based on the equivalent radiation temperature and the equivalent temperature of the inner edge of the quartz bell jar, the net radiation incident heat power transmitted from the annular slit radiation cavity of the rapid thermal processing furnace to the wafer edge band of the wafer is calculated; and based on the net radiation incident heat power, the target lamp area power replacement vector of the rapid thermal processing furnace is solved. The application can improve the initiative and accuracy of wafer edge temperature control.

This invention discloses a device and method for self-testing and calibration coefficient correction of a radiation pyrometer system, relating to the field of radiation temperature measurement technology. The device comprises a broadband light source, an intensity modulation unit, a first multimode fiber, a return light unit, a second multimode fiber, and a multichannel radiation pyrometer. The return light unit shares the second multimode fiber with the object under test, ensuring that the transmission path of the return light monitoring signal is consistent with that of the radiation signal under test. The method includes system self-testing and calibration coefficient correction: Transmission link loss is calculated by comparing the return light amplitude of the reference and actual states, achieving system status self-testing and abnormal channel location; initial calibration coefficients are calculated based on standard temperature source measurements combined with Planck's radiation law, and then the transmission loss factor is calculated through changes in the return light signal amplitude to dynamically correct the calibration coefficients; finally, the spectral radiance is calculated using the corrected coefficients, and the impact temperature to be measured is obtained through least squares fitting. This invention enables rapid system self-testing and dynamic coefficient correction.

The application discloses an infrared radiation quantitative prediction method for bearing rock damage instability time, and belongs to the technical field of monitoring and early warning of rock mass body fracture instability. An infrared radiation temperature matrix of bearing rock is acquired, temperature drift noise is removed, a bearing rock thermal image damage heat dissipation index is calculated, and a rock crack unstable expansion moment is determined by using a damage heat dissipation autocorrelation coefficient. The crack unstable expansion moment is taken as a starting point, the average change rate of the damage heat dissipation in a time window is calculated, the power law relationship between the average change rate of the damage heat dissipation and time is used to determine a power law index p, the infrared radiation data set for rock damage prediction is constructed by using the average change rate of the damage heat dissipation, a damage prediction time sequence is linearly regressed, and a fitting straight line is linearly extrapolated to a time axis to realize rock damage prediction. The method can realize the time prediction of bearing rock damage instability, and has important significance for rock mass engineering disaster prevention induced by rock damage.

The application relates to the technical field of blackbody radiation sources, in particular to a large-area source electric heating blackbody radiation source capable of switching low-temperature modes, which comprises a box frame, the outer walls of the box frame are provided with sealing plates on both sides, the inner walls of the two sealing plates are provided with partition frames, one side of the outer walls of the two sealing plates is provided with circulating structures, the circulating structures comprise circulating water tanks fixed to one side of the outer walls of the sealing plates, the top ends of the two circulating water tanks are fixedly connected with heat dissipation boxes, the inner walls of the two heat dissipation boxes are provided with a plurality of heat dissipation pipes, the top ends of the plurality of heat dissipation pipes penetrate through hot water transmission boxes, the bottom ends of the plurality of heat dissipation pipes penetrate through the top ends of the circulating water tanks, and the outer walls of the heat dissipation boxes are provided with a plurality of heat dissipation fans. The large-area source electric heating blackbody radiation source capable of switching low-temperature modes has the advantages that the low-temperature mode can be switched, the radiation temperature of the large-area source is ensured to be consistent, and the temperature stable period is short.

The application provides a charged equipment defect diagnosis method, system and equipment based on sound heat and visible light data fusion, acquires acoustic signals, infrared thermal image data and visible light images; based on visible light image features and infrared hot spot distribution, real-time alignment is performed in a spatial coordinate system, and a mapping relationship between a three-dimensional coordinate system and image pixel coordinates is established; an adaptive beam forming algorithm based on feature subspace decomposition is used to suppress environmental acoustic noise in the acoustic signals; according to the measured distance and environmental meteorological parameters obtained in real time, dynamic atmospheric transmittance compensation and radiation temperature inversion are performed on the infrared thermal image data, and the corrected absolute temperature field of the equipment surface is obtained; a three-dimensional fusion temperature field reflecting the internal medium state of the equipment is generated through an iterative algorithm; the preprocessed acoustic signals, three-dimensional fusion temperature field and visible light images are input into a trained multi-channel deep learning model, and thus the defect category, three-dimensional coordinates and risk index are output.

FIELD: measuring equipment.SUBSTANCE: according to the method for assessing the quality of thermal imaging aerial survey systems, the flight altitudes of the unmanned aerial system for thermal imaging aerial survey are selected to form the extrapolation base, thermal line targets are placed on the ground, their thermal contrast is determined by measuring the radiation temperatures of warm and cold lines, infrared aerial photography of the line targets is performed using thermal imaging aerial photography, and the aerial photographs are interpreted by a group of operators. Based on the results, the values of the linear resolution on the ground and the corresponding values of the coefficients of transmission of threshold thermal contrasts are determined based on measurements of the temperatures of pixels in images of warm dark and cold light strokes of the smallest recognized group of thermal stroke patterns in tone gradations from 0 to 255. A graph of the dependence of the terrain linear resolution on the altitude is constructed, a trend equation is determined by approximating the constructed graph with a third-order polynomial function, the trend is validated, and the predicted value of the linear resolution on the terrain for the predicted flight altitude is calculated without performing a flight of the unmanned aerial system for thermal imaging aerial photography at this altitude by extrapolating the trend, for which the value of the predicted altitude is substituted into the trend equation of the dependence of the terrain linear resolution on the altitude.EFFECT: increase in the accuracy of estimating the terrain linear resolution of thermal imaging aerial survey systems.6 cl, 2 dwg, 2 tbl

This invention relates to the field of temperature measurement technology, and in particular to a high-precision upconversion fluorescence wide-temperature-range temperature measurement method. By setting a switching temperature threshold, a fluorescence afterglow lifetime temperature measurement mode, which is highly sensitive to temperature, is used in the low and medium temperature ranges to ensure high accuracy. In the high temperature range, it automatically and seamlessly switches to a fluorescence radiation temperature measurement mode, utilizing the thermal radiation effect of the fluorescent material itself for measurement. This effectively compensates for the shortcomings of the fluorescence lifetime method in the high-temperature range, realizing continuous and high-precision temperature measurement from deep low temperature to high temperature. At the same time, a unified signal preprocessing and temperature prediction model is used to process the signals in both modes, making the system architecture simple and the data processing flow unified. The temperature measurement mode is automatically selected by judging the temperature prediction value corresponding to the intensity of the upconversion fluorescence signal, without manual intervention, realizing intelligent and fully automatic measurement.