Method of integral radiating ability measuring using micro furnace (versions)

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment and can be used in materials transmitting properties analyzing. Method of integral emissivity measuring consist in solid body analyzed sample fixation in separate chamber, said sample heating to preset temperature T on its surface and recording by heat sensor of radiant energy emitted from analyzed sample surface. Prior to heating analyzed sample is placed into graphite block body, surrounded by heat insulation with ultra low heat conductivity, and performing graphite block heating by direct laser radiation supplying to graphite block local zone until this block heating to preset temperature T and simultaneous heating of analyzed sample arranged in this block body by heat transfer from graphite block to sample to condition of their heating temperatures equality. Then analyzed sample is removed from graphite block body and placed in full radiation pyrometer sight area acting as radiant energy receiver. Then performing sample natural cooling due to heat loss by radiation while simultaneously recording sample cooling down rate caused by total radiation losses from its full surface, for cooling down thermogram measurement and integral emissivity calculating.

EFFECT: increasing accuracy of obtained results.

5 cl, 3 dwg

 



 

Same patents:

FIELD: instrumentation.

SUBSTANCE: method includes the measurement of temperature of liquid metal through the sight glass by means of the pyrometer the signal from which is corrected in view of electric conductivity of the film deposited on the sight glass. Note that in addition the measurement and correction by temperature of the deposited film on the sight glass are performed.

EFFECT: improvement of accuracy and expansion of range of measurement with pre-set error.

1 dwg

FIELD: physics.

SUBSTANCE: method includes generating infrared radiation of two images at a single wavelength at each of two image sensor arrays. One of the two images at each sensor is the image of the object under analysis and the other is the temperature reference image which is formed under the same conditions as that of the object under analysis. The image at one of the two sensors is formed by a mirror scanning device. The obtained data are used to form an array of digital data from all images based on the link between the brightness temperature, produced by the temperature reference, and the corresponding digital value of the electrical signal from elements of both image sensors.

EFFECT: higher time resolution of measurements.

6 dwg, 1 tbl

FIELD: measurement equipment.

SUBSTANCE: invention relates to engine operation control and considers the method of monitoring of high-temperature area of gas-turbine engines. For implementation of the method in the stationary vane with internal cooling the monitoring ports are made. In the vane a distal end of the monitoring device is arranged.

EFFECT: monitoring device is designed with a possibility of change of position in the stationary vane with reference to the longitudinal axis of the vane and functional connection with ports for providing a necessary field of view of the area under consideration.

20 cl, 7 dwg

FIELD: physics.

SUBSTANCE: cooled photodetector base is made of material having a thermal expansion coefficient equal to or close to that of the cooled element and, in order to reduce cooling non-uniformity, an opening passes through the entire length of the base, wherein a heat pipe is placed in said opening, and the remaining gap between the heat pipe and the opening of the base is filled with gallium to form a mechanical bond with good thermal conductivity.

EFFECT: invention considerably reduces the temperature gradient when cooling large photodetectors made on both a single substrate and assembled from multiple units.

2 dwg

FIELD: measuring instrumentation.

SUBSTANCE: light emitting device (LED or laser) is placed into environment for temperature measurement. Wavelength λ of light emitting device is measured, and Δλ difference between measured wavelength and known emission wavelength λ0 of the same device at initial temperature T0 is determined. Ambient temperature is calculated by the formula Tx=T0+hcΔλBλ02, where h is Planck's constant, c is speed of light, B is constant of the material.

EFFECT: simplified method of ambient temperature measurement.

2 cl

FIELD: physics.

SUBSTANCE: disclosed is a heat treatment device designed for heat treatment of protein-containing food products (3) and having a microwave radiation detector (1) for measuring internal temperature of the protein-containing food product (3), movement means for moving the products (3) through the device in a movement direction (y-direction) such that the products (3) pass under a fixed detector (1), and heat treatment means controlled by a signal from the detector (1). The detector (1) has a sensitive surface of 0.1-180 mm2, which detects microwave radiation emitted by the product and which faces the movement means. The detector is capable of measuring internal temperature of the product at a measurement wavelength which is shorter than length of the product in the horizontal direction (x-direction), perpendicular to the movement direction (y-direction).

EFFECT: high accuracy of obtained data.

13 cl, 8 dwg

FIELD: instrumentation.

SUBSTANCE: multi-strand material is put in heat-conducting contact with at least one disc, turning around the specified disc installed as capable of rotation and heating to the specified temperature, and they measure difference of temperatures of a multi-strand material or values that characterise temperature of the multi-strand material, prior to entrance of the multi-strand material to a disc and after exit of the multi-strand material from the disc. The invention also relates to the appropriate device, making it possible to implement the above method.

EFFECT: increased accuracy of temperature measurement.

26 cl, 4 dwg

FIELD: instrumentation.

SUBSTANCE: claimed invention relates to thermometry and can be used for quantum theory-based correction of radiation thermometer temperature. It allows detection of parameters describing the structure of energy levels with the help of efficient physical model for calibration of radiation thermometer system. For this, radiation thermometer system is set to temperature measurement state to reveal object radiation energy via optical system. Parameters describing the structure of energy levels are defined by calculation and processing by PC and MCU in radiation thermometer system in compliance with physical model. Said parameters are used for calibration of radiation thermometer. To realise described method, radiation thermometer system is used including temperature measurement module, calibration module, PC or MCU used for calibration of radiation pyrometer in compliance with parameters describing the structure of energy levels.

EFFECT: higher precision.

12 cl, 6 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: method involves forming channels of different depth inside a structural material and performing temperature scanning in the prepared channels with a system of remote infrared pyrometers. The obtained measurement information is used to determine the temperature profile in the sample.

EFFECT: high accuracy of measurements and enabling measurement of the temperature profile in multilayer samples of composite materials.

2 dwg

FIELD: measuring equipment.

SUBSTANCE: cryostat comprises a housing with an entrance window, a working chamber with a cooled platform, a filler unit of cryostatting of the cooled platform in the form of a cylinder for liquefied petroleum gas, a drain tube to exit vapor of gas boiled out. The cylinder for liquefied petroleum gas is equipped with the drain tube. The tube is made with the ability of placing its cold end near the cooled platform in the area of accumulation of vapors of gas boiled out, formed at the orientation of cryostat by the entrance window relative to the horizon in a horizontal, vertical and intermediate positions, except for the position with the entrance window downwards, and the warm end - with the ability of going beyond the cylinder for liquefied petroleum gas.

EFFECT: expansion of spatial orientation range of the cryostat at its operation relative to the horizon.

9 cl, 1 dwg

FIELD: measurement technology.

SUBSTANCE: method of measuring brightness temperature is based upon method of disappearing filament while comparing brightness of filament of standard lamp of pyrometer and object. Temperature of object is found from value of filament heater current after brightness of filament and object are brought to equality. Brightness of object is registered by means of multielement photoreceiver. Filament heater current is applied to reference lamp at pyrometer calibration mode only. Mode of calibration is performed upon receiving signal from device being sensitive to change in temperature. Image of filament of reference lamp is projected onto photosensitive surface of photoreceiver in the mode of calibration only.

EFFECT: improved precision of measurement of brightness temperature.

1 dwg

FIELD: plasma testing.

SUBSTANCE: flows of tested particles which leave different areas of plasma are formed by means of subsequent scanning of total area of plasma. For the purpose the particles are passed through slits of diaphragms. One diaphragm is rotated in such a way that area of overlapping of slits moves relatively plasma. Moments of time of measurement of re-charge neutrals spectra are fixed which moments correspond to different positions of slits. Time of registration of any spectrum is compared with area of plasma to be analyzed. Device has two diaphragms disposed on the way of analyzed particles directly in opposition to each other for forming bundle of particles. One diaphragm is mounted for rotation to form re-charge neutrals flows.

EFFECT: improved precision of measurement.

5 cl, 4 dwg

FIELD: measuring technique.

SUBSTANCE: method comprises emitting the active member made of a plate of monocrystal semiconductive material of different thickness, forming local areas of melting, measuring surface density of the melting area and volume of liquid phase of one of the local area of melting, and determining density of the incoherent radiation.

EFFECT: expanded functional capabilities.

cl, dwg

FIELD: railway transport; testing facilities.

SUBSTANCE: invention can be used for orientation of ground chamber of equipment for automatically detecting overheated axle-boxes in trains. According to proposed method, laser radiations source is preliminarily installed on receiving chamber. Laser beam is focused with optical axis of bolometer in zone of axle-box unit of passing-by train. Heat of orientating device is set in point of orientation and laser radiation source is activated. By changing position of ground chamber, laser beam is adjusted to get onto radiating element of orientation device.

EFFECT: reduced labor input in orientation of optical system of ground chamber, increased safety of traffic.

1 dwg

FIELD: radiation pyrometry.

SUBSTANCE: the radiation detector has two sandwich-type sensing elements installed perpendicularly to the optical system axis coinciding with the radiation flux, and a measuring device with two coordinate recording units, each sensing element is made on the form of a plane-parallel plate of a highly alloyed ferroelectric crystal of class 3 m with translucent electrodes with a different work function. The polar axes of the crystals are positioned at an angle of 2 to 5 deg. to their inlet faces and oriented mutually perpendicularly, and the projections of the polar axes to the optical system axis are directed opposite the radiation flux. The electrode with a lower work function of the metal output is engageable with the inlet face of the crystal, and the electrode with a higher work function of the metal output-with its outlet face.

EFFECT: expanded functional potentialities due to determination of the radiation flux coordinates of not only alternate but also of constant power, enhanced accuracy of determination of the radiation flux coordinates of an alternate power.

1 dwg

FIELD: measuring techniques.

SUBSTANCE: infrared image of an object is formed on the receiver of a matrix electronic image detector. Supplementary spectral selection of radiation incident on the image detector in the wavelength range from 7μm to 14μm is achieved through a spectral-selective element, whose wavelength is a monotonous function of transmission. There is extra registration of electrical signals from the matrix electronic image detector, analogue-digital conversion of data signals and formation of an extra array of digital data of the object image. An array of the digital data of the temperature of the object is formed by determining the ratio of corresponding elements of the fundamental and supplementary arrays of digital data of the image of the object.

EFFECT: increased accuracy in determining temperature of weakly heated objects.

10 cl, 6 dwg

FIELD: measuring instruments.

SUBSTANCE: method consists in taking an image of a surface under study in the visible or infrared range of the emission spectrum, transforming the image into colour components in a digital form, and, synchronously with the image taking, measuring the temperature, e.g. by means of thermocouples, in several reference point of the surface under study and forming dependencies of the temperature on values of the colours components or their combinations, and the temperature in the other points of the surface under study is determined basing on these dependencies. Moreover, the reference points are arranged in the points of the surface under study where temperature is distributed over the range of possible temperature changing in flight conditions under study.

EFFECT: increase of temperature measurement accuracy.

2 cl

FIELD: physics.

SUBSTANCE: temperature sensor includes one-pixel microbolometer matrixes, infrared absorbing layer, at least one support arm bearing at least one hanged diode. At least one support arm is used for electric signal transmission. Sensor includes reading circuit with current output connected in each line. And line switch circuit contains connected closed key providing resistance compensation.

EFFECT: increased transformation coefficient.

5 cl, 1 dwg

FIELD: physics.

SUBSTANCE: device consists of a cylindrical vacuum chamber in which there is a cooling screen, material test specimen with a heater, fixed on a rotating suspension, and an optical measuring system, consisting of a monochromator, modulator, infrared lenses and a radiation receiver. The sample is heated either by infrared radiation or by electrical current due to ohmic resistance.

EFFECT: measurement of angular dependencies of spectral ratios of radiation.

2 dwg

FIELD: physics; measurement.

SUBSTANCE: invention is related to facilities for solar radiometry of incoming radiation fluxes and may be used in meteorology. Solar radiation is measured on craft with the help of solar radiometry facilities, providing compensation of errors that might occur due tossing effect. Measurements are carried out with the help of radiometer that contains rigidly connected pyranometer and pyrgeometer. At that short-wave solar radiation is periodically measured with the help of pyranometer directed upwards, and incoming long-wave radiation is measured with the help of pyrgeometer directed upwards. At that compensation of specified errors is provided by measurement with pyranometer with period of 10±0.01 s. Measurement results are transformed from analog to digital form with the help of analog-digital transducer. Incoming total solar radiation is determined with the help of computer aids.

EFFECT: reduction of time and higher accuracy of measurements, and also expansion of functional resources.

5 dwg

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