Method for noncontact measurement of thermal characteristics of moving object |
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IPC classes for russian patent Method for noncontact measurement of thermal characteristics of moving object (RU 2421695):
Method for thermal monitoring of moving hot bodies / 2418273
Hot surface of a body is scanned from the front and the back in the direction of movement. Radiation flux with radially symmetrical spectral distribution is formed on each surface. Spectral components of radiation flux picked up from the front and the back is focused along its optical axis. The radiation is spectrally decomposed and the spectral energy distribution in the spatial distribution radiation spectrum of the front and rear surfaces of the body is analysed. The current temperature in real space-time coordinates of the moving body is determined from the spectrum and its moving away from or approaching focused receivers.
 Method for remote measuring temperature of moving object / 2396525
Method involves optical reception of the thermal radiation signal of the object, spectral decomposition of the signal, formation of an radiation spectrum image on the surface of a matrix of receivers, signals from the outputs of which are approximated by approximants of a Planck function database for a set of temperature values. The most accurate approximant is selected and its corresponding temperature value and error are output. The same signals from the receiver matrix are approximated using the database for a set of images of the object. The most accurate approximant is selected and its corresponding error for identifying the image of the object is output in form of a drive alignment signal with possibility of aligning the optical system in the direction of the moving object.
 Method of measuring temperature in areas with ionising radiation / 2386113
Method of measuring temperature in areas with ionising radiation involves putting a sample of fissile material into a reactor core, placing near a fibre-optic guide made from the same material as an additional light guide in form of a loop. Thermal radiation from the surface of the sample of fissile material is output through the fibre-optic guide. Luminosity is measured in at least two spectral ranges, from which temperature of the analysed sample is determined. Optical radiation is transmitted to the additional light guide in form of a loop and the measured temperature is corrected using change in transparency of the light guide loop in the same spectral ranges. The optical source is a photometric lamp with a tape incandescent body.
 Method for measurement of object emissive power by measured temperature / 2382994
Invention is related to the field of pyrometry and radiometry. Method includes collection and focusing of heat radiation, extraction of N spectral ranges, conversion of radiation in each spectral range into electric signal, their amplification and digitisation, detection of the first N-1 derivative signals of central spectral range by wave length, measurement of temperature and emissive power of object by functional ratio that relates selected signal and its derivatives.
 Multichannel device for measurement of pyrometric characteristics / 2366909
Invention is related to metering equipment. Device represents a polychromator with fiber optic input, concave diffraction grid and multi-element row of photodetectors at the inlet. Photodetectors are connected via signal amplifiers to programmable commutator. From the commutator outlet signals are supplied via ADC to personal computer. Fiber light conductor serves for transmission of signal to a safe distance, and also for averaging of spatial heterogeneity of investigated object. Deliberately large amount of spectral channels makes it possible to select wavelengths by programmable method, which will be optimal for investigation of this object, and also by grouping of row elements to form band filters of rectangular shape with specified width in set wave lengths.
 Method of pyrometric measurements / 2365883
Invention is related to measurement equipment. Dispersion device used is reconfigurable acoustooptical filter with availability of single receiver of radiation for pyrometric signals. By values of logarithms of spectral components at extreme (first and third) wavelengths, temperature of spectral ratio is measured, correction to which used to obtain sought for actual temperature is defined by value of logarithms of three spectrum components.
 Method of determining temperature, radiation coefficient, and mean particle diameter / 2298159
Method comprises experimental determining of brightness of the radiation of the dispersed fluid for several wavelengths, determining preliminary value of temperature, calculating of the dependence of radiation coefficient on the wavelength for several particle diameters, and calculating expected pyrometer signals.
 Two-channel spectral ratio pyrometer / 2290614
Two-channel spectral ration pyrometer comprises two photodetectors. The first photodetector is made of a filter that transmits radiation with a wavelength more than 800 nm. The second photodetector is mounted behind the first one so that it receives radiation that is passed through the first photodetector. In front of the first photodetector is the light filter that absorbs radiation in the visible spectral band, e.g., wavelengths from 300 to 600 nm, and transmits radiation in the long wavelength band. The filters and photodetectors are arranged at the optical axis of the lens.
 Method for optical monitoring of parameters of steel continuous casting and optical meter / 2255834
Method comprises steps of continuous frame by frame registration of irradiation of surface portion of continuously cast billet; converting signal to digital form; comparing several successive frames; calculating instantaneous motion of irradiation field of billet surface; determining current length of billet by summing instantaneous motions in desired time interval. Optical meter is arranged near sections of secondary cooling zone of plant for continuous casting of steel and orienting it to wide face of billet; registering image of surface in three ranges of wave length values, namely λ1 - λ2; λ2 - λ3; λ3 - λ4 and with use of known relationship of Wien - Planck temperature field of surface of continuous cast billet is obtained. Instantaneous motion of temperature field of cast billet in two directions is calculated, namely along edge of billet and along its central part for determining bulging degree of blank with use of given relation. Optical meter includes housing and successively arranged in it: lens, coordinate sensing photo-detector, unit for analog- to-digital processing, control unit and separate computer for storing archive data and displaying them. Prism is mounted behind lens and three coordinate-sensing photo detectors sensitive to different intervals of wavelength values are arranged behind prism. Outlet of each photo-detector is connected with inlet of analog-to-digital processing unit whose outlet is connected with inlet of control unit connected with computer.
 Mode of pyrometric measuring / 2255312
The mode includes measuring of true temperature of the surface by magnitude of brightness temperature no less than on three lengths of waves. Measuring of no less than three components of spectrum one can calculate logarithm of making coefficient of spectral radiating capability on coefficient of transmission of an intermediate sphere for each length of the wave. At that every three meanings of the length of the waves are chosen so near that dependence of the logarithm from the sworn product from the length of the wave would be linear. The meanings of the logarithm of the sworn product are subtracted out of measured reverse meanings of brightness temperatures and received expressions are summarized for receiving of a reverse meaning of sought true temperature.
 Method of measuring color temperature of metal / 2251669
Method is base upon separation of spectral components of radiation for three or more wavelengths. After spectral components are separated, radiated is subject additionally to polarization filtering by means of polarization-sensitive system which has at least four photoreceivers for each spectral component of radiation. Degree of polarization of metal self-radiation and degree of radiation polarization from zone of processing are taken into account. Spectral distribution of radiation is calculated. Averaged value of color temperature of metal is calculated from three values of temperature of metal by using methods of statistical processing.
 Multichannel radiation pyrometer / 2253845
Each brightness temperature channel of the device has the following units connected in series: radiation receiver, amplifier, analog-to-digital converter and code converter having output connected to registrar. Color channel has divider at output of brightness channel analog-to-digital converter and code converter connected with output to registrar. The second divider, multiplier, shift register, comparison unit having memory unit for presetting value of error of measurement and circuit interrupter are introduced into device additionally. Shift register, comparison circuit and interrupter are introduced at output of color channel code converter. The same output is connected with second inputs of code converters in color channels. Second outputs of color channels are connected with input of multiplier through the second divider. Multiplier has the other input connected with first divider and output - with input of color channel code converter.
Mode of pyrometric measuring / 2255312
The mode includes measuring of true temperature of the surface by magnitude of brightness temperature no less than on three lengths of waves. Measuring of no less than three components of spectrum one can calculate logarithm of making coefficient of spectral radiating capability on coefficient of transmission of an intermediate sphere for each length of the wave. At that every three meanings of the length of the waves are chosen so near that dependence of the logarithm from the sworn product from the length of the wave would be linear. The meanings of the logarithm of the sworn product are subtracted out of measured reverse meanings of brightness temperatures and received expressions are summarized for receiving of a reverse meaning of sought true temperature.
Method for optical monitoring of parameters of steel continuous casting and optical meter / 2255834
Method comprises steps of continuous frame by frame registration of irradiation of surface portion of continuously cast billet; converting signal to digital form; comparing several successive frames; calculating instantaneous motion of irradiation field of billet surface; determining current length of billet by summing instantaneous motions in desired time interval. Optical meter is arranged near sections of secondary cooling zone of plant for continuous casting of steel and orienting it to wide face of billet; registering image of surface in three ranges of wave length values, namely λ1 - λ2; λ2 - λ3; λ3 - λ4 and with use of known relationship of Wien - Planck temperature field of surface of continuous cast billet is obtained. Instantaneous motion of temperature field of cast billet in two directions is calculated, namely along edge of billet and along its central part for determining bulging degree of blank with use of given relation. Optical meter includes housing and successively arranged in it: lens, coordinate sensing photo-detector, unit for analog- to-digital processing, control unit and separate computer for storing archive data and displaying them. Prism is mounted behind lens and three coordinate-sensing photo detectors sensitive to different intervals of wavelength values are arranged behind prism. Outlet of each photo-detector is connected with inlet of analog-to-digital processing unit whose outlet is connected with inlet of control unit connected with computer.
Two-channel spectral ratio pyrometer / 2290614
Two-channel spectral ration pyrometer comprises two photodetectors. The first photodetector is made of a filter that transmits radiation with a wavelength more than 800 nm. The second photodetector is mounted behind the first one so that it receives radiation that is passed through the first photodetector. In front of the first photodetector is the light filter that absorbs radiation in the visible spectral band, e.g., wavelengths from 300 to 600 nm, and transmits radiation in the long wavelength band. The filters and photodetectors are arranged at the optical axis of the lens.
Method of determining temperature, radiation coefficient, and mean particle diameter / 2298159
Method comprises experimental determining of brightness of the radiation of the dispersed fluid for several wavelengths, determining preliminary value of temperature, calculating of the dependence of radiation coefficient on the wavelength for several particle diameters, and calculating expected pyrometer signals.
Method of pyrometric measurements / 2365883
Invention is related to measurement equipment. Dispersion device used is reconfigurable acoustooptical filter with availability of single receiver of radiation for pyrometric signals. By values of logarithms of spectral components at extreme (first and third) wavelengths, temperature of spectral ratio is measured, correction to which used to obtain sought for actual temperature is defined by value of logarithms of three spectrum components.
Multichannel device for measurement of pyrometric characteristics / 2366909
Invention is related to metering equipment. Device represents a polychromator with fiber optic input, concave diffraction grid and multi-element row of photodetectors at the inlet. Photodetectors are connected via signal amplifiers to programmable commutator. From the commutator outlet signals are supplied via ADC to personal computer. Fiber light conductor serves for transmission of signal to a safe distance, and also for averaging of spatial heterogeneity of investigated object. Deliberately large amount of spectral channels makes it possible to select wavelengths by programmable method, which will be optimal for investigation of this object, and also by grouping of row elements to form band filters of rectangular shape with specified width in set wave lengths.
Method for measurement of object emissive power by measured temperature / 2382994
Invention is related to the field of pyrometry and radiometry. Method includes collection and focusing of heat radiation, extraction of N spectral ranges, conversion of radiation in each spectral range into electric signal, their amplification and digitisation, detection of the first N-1 derivative signals of central spectral range by wave length, measurement of temperature and emissive power of object by functional ratio that relates selected signal and its derivatives.
Method of measuring temperature in areas with ionising radiation / 2386113
Method of measuring temperature in areas with ionising radiation involves putting a sample of fissile material into a reactor core, placing near a fibre-optic guide made from the same material as an additional light guide in form of a loop. Thermal radiation from the surface of the sample of fissile material is output through the fibre-optic guide. Luminosity is measured in at least two spectral ranges, from which temperature of the analysed sample is determined. Optical radiation is transmitted to the additional light guide in form of a loop and the measured temperature is corrected using change in transparency of the light guide loop in the same spectral ranges. The optical source is a photometric lamp with a tape incandescent body.
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FIELD: physics. SUBSTANCE: method for noncontact measurement of thermal characteristics of a moving object involves optical reception of the thermal radiation signal of the object, spectral decomposition of the signal and formation of an image of the radiation spectrum on the surface of an array of receivers whose output signals are processed by a processor module. Processing with the processor involves object parameter type invariant approximation of approximation signals of the data base of each object parameter, selection of the most accurate approximant and outputting the corresponding parameter value and error in determining said value. EFFECT: increase in number of measured parameters and high accuracy of measuring thermal characteristics. 2 dwg
The invention relates to the field of contactless measurements of thermal data of a moving object and can be used in instrumentation, Metrology, remote sensing. A device for the contactless measurement of temperature (A.S. 1803747, MPK G01J 5/60, 1987)containing the optical system, detector, differentiator, two amplitude detector, an optical local oscillator, tunable optical modulator device mixing of optical beams, resonant amplifier and the unit. Spectral pyrometer (patent US 4605314, INC4 G01J 5/24, 1986), consisting of the electrical module and the optical module, which contains the transmitting unit, the block of spectral decomposition and the detector block. The disadvantages of the known devices are limited in the number of measured parameters of the object (only temperature) and the dependence of the measurements on the angle of direction of a moving radiation source, as if changing this angle changes the position of the image spectrum radiation on the surface of the detector spectrum radiation. Closest to the proposed solution method is implemented in the device for the contactless measurement of the temperature of a moving object (patent RU 2213942, MPK7 G01J 5/60, 2003), in which the optical signal of thermal radiation of the object, with ctrlname the decomposition of the signal, the imaging spectrum of radiation on the surface of a matrix of receivers, the signals from the outputs of which are processed by the processor unit, configured to search the maximum value of the output signal of the receiver by a matrix of receivers, the ability to determine the maximum value of the derivative of the output signals of the receivers by a matrix of receivers and the ability to calculate the temperature of the maximum values of the derivative of the output signals by a matrix of receivers to the maximum value of the output signal of the receiver by a matrix of receivers. The disadvantage of this method is the limited number of measured parameters of a moving object (only temperature) and accuracy (as in CPU processing to determine the maximum values of the signal by a matrix of receivers used energy is only one receiver, which reached the end of the maximum signal). The objective of the invention is to increase the number of measured parameters of a moving object and the accuracy of the measurements. The solution is achieved by the method for the contactless measurement of thermal data of a moving object, in which the optical signal of thermal radiation of the object, the spectral decomposition of the signal, the imaging spectrum of radiation at the surface is rnost matrix of receivers, the signals from outputs of which are processed by the processor unit, enter CPU processing, comprising invariant to the type of the object parameter signal approximation matrix of receivers approximants Bank data for each parameter of the object, selecting for each object parameter most accurate approximants and output the corresponding parameter values and errors of its definition. The technical result is that increasing the number of measured parameters of a moving object due to the introduction of CPU processing, invariant type parameter, and the accuracy of the measurements due to the use of CPU processing power of all receivers of a matrix of receivers. The method can be implemented in accordance with the block diagram presented in figure 1, and the technical design is illustrated in figure 2. Structural diagram contains the optical system 1, block 2 spectral decomposition, matrix, 3 receivers, the processing unit 4 and banks 5 data parameters. Method for the contactless measurement of thermal data of a moving object is implemented as follows. From the source 6 of thermal radiation signal through the optical system 1 on block 2 spectral decomposition, which is formed an image of the spectrum of the radiation on the surface of the matrix 3 receivers, Ignacy outputs of which are processed by the processor unit 4, and CPU processing is invariant to the type of the object parameter signal approximation matrix 3 receivers approximants stored in banks 5 data of each object parameter, selecting for each object parameter most accurate approximants and output the corresponding value of the parameter Pi and the uncertainty of its determination δPi. For example, for setting the temperature of the object, approximants which are stored, for example, in digital form, as many of Planck functions for different temperatures in the Bank 5 data 1 setting the temperature of the object, the processor processing consists in selecting the Planck function, most closely approximating the signal matrix 3 receivers, and the output corresponding to this function, the values of the temperature T and the approximation error δ t. For "material object", approximants which are stored, for example, in digital form in the form of a set of functions based emissivity material (Fe, Ni, Co and others) from the wavelength of the radiation [1, str, RES] for different materials in the Bank 5 data 2nd parameter "material object", CPU processing is to select the corresponding function that most closely approximating the signal matrix 3 receivers, and the output corresponding to this function, the name of the material, for example, "Fe", and the error approch is imali using the same algorithms processor processing, as in the previous example. With the mutual movement of the radiation source 6 and the measurement system the measurement results as well as in the prototype, are not changed. The elements of the device can be made of known modules and hardware components used in measuring equipment and Metrology. Constructive execution units 1...4 can be identical to the corresponding blocks of the prototype. The design of the memory block 5 is obvious from the prior art. Software CPU processing model. Literature 1. Bramson M.A. Infrared heated phone - M.: Nauka, 1964. - 224 S. Method for the contactless measurement of thermal data of a moving object, in which the optical signal of thermal radiation of the object, the spectral decomposition of the signal, the imaging spectrum of radiation on the surface of a matrix of receivers, the signals from the outputs of which are processed by the processor unit, wherein the processor processing is invariant to the type of the object parameter signal approximation matrix of receivers approximants Bank data for each parameter of the object, selecting for each object parameter most accurate approximants and output the corresponding value of the parameter and the error of its determination.
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