Method and device for radiometric testing

FIELD: radiometric testing.

SUBSTANCE: counting of electric pulses of all the detectors stops simultaneously as soon as any detector registers no less than specified number of electric pulses caused by ionizing radiation.

EFFECT: improved reliability.

2 cl, 1 dwg

 

The invention relates to the field of nondestructive testing and specifically relates to a method of radiometric control of materials and products and devices for its implementation.

Known methods of radiometric monitoring, including the installation operation of the controlled products on the platform managed a discrete mechanism for scanning between the source of ionizing radiation and a detector connected to the meter, the time dimension τ during which this counter will register a specified number of n0electrical impulses caused by photons or particles of ionizing radiation, detection of radiation thickness hγ plot test material corresponding to the aperture of the detector, based on the ratio of:where μ , ρ and h, respectively, the mass attenuation coefficient of the radiation density and the linear thickness of the material for this section, k is the counting efficiency of the block detector count of electrical pulses, a N0- the intensity of the load detector in the absence of articles λ0- rate electric pulse counter detector in the absence of controlled products, λ - rate electric pulse counter detector in the presence of a controlled product, zeroing sodering the counter and moving the test object to the new position and, accordingly, the known device for carrying out such methods, containing an ionizing radiation source, the detector, which has at its output a count of electrical pulses, the unit number n0, timer, digital comparator, crucial unit, the sensor of the beginning of the measuring cycle and controlled mechanism discrete scanning platform to install it controlled products [1].

In the apparatus for implementing such methods, the detector output is connected to the first input of the counter electrical pulses, and the output of the sensor to the beginning of the measurement cycle is connected to the input of the timer and to the second input of the counter electrical pulses; the output of this counter is connected to the first input of the digital comparator, the output of the generator is the number of n0- his second entrance. Output unit number n0connected also to the first input of a casting device, the second input is connected to the output of the timer. The output of the digital comparator is connected to the third input of the counter electrical pulses to the control input of the controlled mechanism discrete scan. On the platform of this mechanism fixed test object so that it crosses the axis “a source of ionizing radiation detector”. Solver configured to solve the equation:

Compared with the methods and their underlying devices based the on the job a constant period of time τ 0=const, which is the number of registered pulses [2], such methods of radiation control and implement their devices with digital scanning products with varying thickness to provide at a constant value of the statistical error of measurementthe best possible performance control, because smaller radiation thickness hγ time τ reduced accordingly. However, when using such technical solutions utilization of the spatial characteristics of the source of ionizing radiation has very low value.

The closest is the way radiometric control, including the installation of a controlled product on the platform managed a discrete mechanism for scanning between the source of ionizing radiation and a block of m detectors, each of which has at its output a count of electrical pulses, the time dimension τmaxduring which the counter of one of the m detectors, the aperture of which corresponds to the area of the controlled products with maximum absorbency, will register a specified number of n0electrical impulses caused by photons or particles of ionizing radiation, the determination of the radiation thickness is hγ area controlled area of the product corresponding to the aperture of the detector, based on the ratio of:where μ , ρ and h, respectively, the values of mass attenuation coefficient of the radiation density and the linear thickness of the material for this section, k is the counting efficiency of the block detector count of electrical pulses, and N0- the intensity of the load detector in the absence of the product, n0- set the number of registered electrical impulses λ0- rate electric pulse counter detector in the absence of controlled products, λ - rate electric pulse counter detector in the presence of a controlled product, zeroing the contents of each of the m counters and moving the test object to a new position when the time τ ≥ τmaxand accordingly, the device for containing a source of ionizing radiation, a block of m detectors, each of which has at its output a count of electrical pulses, the unit number n0, timer, m digital Comparators, crucial unit, the sensor of the beginning of the measurement cycle, the driven mechanism discrete scanning platform to install on it a controlled product, m triggers, having m input is s the logical element “And”, moreover, the output of each of the m detectors connected to the counting input of the corresponding counter of electrical pulses, the output of the sensor to the beginning of the measurement cycle is connected to the first control input of each of the m counters of electric pulses and to the first control input of the timer, the output of each of the m counters electrical pulses connected to the first input of the corresponding comparator output unit number n0connected to the second input of each of the m digital Comparators, the output of each of the m Comparators connected to the first input of the corresponding trigger, the output of each of m triggers connected to the appropriate input m-Vodolaga logical element “And”exit m-Vodolaga logic element And connected to the second input of each of m and triggers to the control input of the scanning mechanism, the output of the timer is connected to one input of a casting device [3].

When implementing this method zeroing all counters is done after the registration of each of a given number of n0and the movement of controlled items to a new position carried out at preset time τmax. Of the radiation thickness of each of the sections is controlled by the area corresponding to the aperture of the i-th detector is judged based on the ratio of:where τ the time set the number of n0the i-th counter, and one of the values τimaxthat λ0i- rate electric pulse counter with i-th detector in the absence of controlled products, λi- rate electric pulse counter with i-th detector in the presence of controlled products. Accordingly, the device for implementing this method contains m clocks, the first input of each of which is connected to the first input of the sensor is the beginning of a measurement cycle, the second input to the output of each of Comparators, and the output to the appropriate input of a casting device.

The method and apparatus in accordance with the prototype provides a significant increase in the utilization of the spatial characteristics of the source of ionizing radiation, however, the disadvantage of the prototype is shown in the fact that not minimized the statistical component of the measurement error for areas with lower radiation thickness.

Object of the invention is to provide such a method of radiometric monitoring and device for its implementation, in which the lack of technical solutions, selected as a prototype, would be eliminated. This task is solved in that in the method of radiometric control, including the installation of a controlled product on the platform pack is supplied mechanism of discrete scanning between the source of ionizing radiation and a block of m detectors, each of which has at its output a count of electrical pulses, the time dimension τmaxduring which the counter of one of the m detectors, the aperture of which corresponds to the area of the controlled products with maximum absorbency, will register a specified number of n0electrical impulses caused by photons or particles of ionizing radiation, the determination of the radiation thickness hγ area controlled area of the product corresponding to the aperture of the detector, based on the ratio of:where μ , ρ and h, respectively, the values of mass attenuation coefficient of the radiation density and the linear thickness of the material for this section, k is the counting efficiency of the block detector count of electrical pulses, and N0- the intensity of the load detector in the absence of the product, n0- set the number of registered electrical impulses λ0- rate electric pulse counter detector in the absence of controlled products, λ - rate electric pulse counter detector in the presence of a controlled product, zeroing the contents of each of the m counters and moving the test object to a new position when the time τ ≥ τmaxthat is odd electrical impulses each of the other m-1 detectors shall be terminated at the time τ =τmaxand the values of radiation thicknesses hγieach of the other m-1 plots controlled zone products determined from the relation:where μithat ρihirespectively the values of the mass attenuation coefficient of the radiation density and linear material thickness characterizing the radiation thickness of the area of the test object corresponding to the aperture of the i-th detector from the set of m-1 detectors, kiaudit the effectiveness of the i-th detector is the i-th counter, N0ithe load intensity at the input of i-th detector in the absence of the product, n is the number of electrical pulses registered by the counter i-detector for time τmaxthat λ0i- rate electric pulse counter with i-th detector in the absence of controlled products, λi- rate electric pulse counter with i-th detector in the presence of the test object.

Accordingly, the device for implementing the radiation-based control, containing a source of ionizing radiation, a block of m detectors, each of which has at its output a count of electrical pulses, the unit number n0, timer, m digital Comparators, solver, beginning sensor will measure the high cycle managed a discrete mechanism for scanning platform to install on it a controlled product, m triggers, having m inputs of the logical element “And”, and the output of each of the m detectors connected to the counting input of the corresponding counter of electrical pulses, the output of the sensor to the beginning of the measurement cycle is connected to the first control input of each of the m counters of electric pulses and to the first control input of the timer, the output of each of the m counters electrical pulses connected to the first input of the corresponding comparator output unit number n0connected to the second input of each of the m digital Comparators, the output of each of the m Comparators connected to the first input of the corresponding trigger, the output of each of m triggers connected to the appropriate input m-Vodolaga logical element “And”exit m-Vodolaga logic element And connected to the second input of each of m and triggers to the control input of the scanning mechanism, the output of the timer is connected to one input of a casting device, the output of the m-Vodolaga logic element And also connected to the second control input timer input stop the timer and reset its content and connected to the second control input of each of the m counters of electric pulses to the input of the stop and account about what Alenia content and the output of each of the counters of electric pulses is connected to the input of a casting device. This embodiment of the claimed technical solution provides a solution to the problem due to the fact that until the counter of the detector, the aperture of which corresponds to the plot of the controlled products with a maximum thickness, will not count a number of pulses equal to a given value of n0each of the other counters of electrical impulses from the set of m-1 continues the expense of electrical impulses, and thus provides for each of the corresponding m-1 detectors extremely low value of the statistical component of the measurement error of the radiation at a given value of the error of measurement for the area with the greatest absorptive capacity. Thus, the claimed method and device reported a new consumer as consisting in the fact that improving the reliability of control without loss of performance.

The drawing shows a block diagram of the device radiometric control, explaining the essence of the invention.

To simplify the consideration of a substantial part of the method and device for its implementation the drawing shows only two of the measuring channel, the apertures of the detectors which correspond to different thicknesses kontroliruemom the product. In accordance with the drawing, the device comprises a source 1 of ionizing radiation, specifically137Cs activity of 1.85· 1011Bq, detectors 2 and 3, each of which consists of articulated optical monocrystal NaJ(Tl) and a photomultiplier tube, the counters 4 and 5 are electrical impulses, the Comparators 6 and 7, unit 8, n0, triggers, 9 and 10, the logical element 11 And the timer 12, made in the form of a set of generator oscillations of high frequency and count the number of pulses, the crucial device 13, the driven mechanism 14 discrete scanning platform 15, a sensor 16 to the beginning of the measurement cycle on the platform 15 posted by a controlled product that has lots 17 and area 18, so that the radiation thickness of the area 17 compared to area 18 is four times smaller section. The counting input of the counter 4 is connected to the output of the detector 2, is similar to a counter input 5 - output of the detector 3, the output of the counter 4 is connected to the first input of the comparator 6, and the output of the counter 5 to the first input of the comparator 7, the second input of a comparator 6 and the comparator 7 is connected to the generator 8. The output of the comparator 6 is connected to the first input of the trigger 9, and the output of the comparator 7 to the first input of the trigger 10. The trigger output 9 is connected to the first input element 11, and the output of the trigger 10 to the second input of the element 11. The sensor 16 information associated with the mechanism 4. The output of this sensor is connected to the first input of the counter 4, to the first input of the counter 5 and to the first input of the timer 12. The output element 11 is connected to the second input of the timer 12, to the third input of the counter 4, to the third input of the counter 5, the second input of the trigger 9, the second input of the trigger 10 and to the input of the control mechanism 14. The second output of the counter 4 is connected to the first input unit 13, and the second output of the counter 5 is connected to the second input unit 13. The output of the timer 12 is connected to the third input of the block 13.

The device operates as follows. In the first stage, a source of ionizing radiation137Cs from a container to store the output in operating position. On the platform 15 place the reference plate of known thickness and attenuation coefficient, such as copper. Measure to determine the pulse rate of the electrical pulses λ0iin the absence of the test object for each measuring channel and make the obtained value in the memory unit 13. Then, the radiation source is removed from the operating position, the reference plate is removed, the test object placed on the platform 15. The radiation source output in operating position. Then from the output of the sensor 16 receives the control signal the beginning of the measurement cycle to the first input unit 4, the first input unit 5 and the first input unit 12, and vyhodami 8 receives the control signal as the second input of the comparator 6, and to the second input of the comparator 7, which specifies the number of registered pulses n0. Passing through the sections 17 and 18 of the controlled products photons of ionizing radiation received by the detectors 2 and 3, respectively. Consequently, at the output of the detector 2 and the output of the detector 3 are electrical impulses corresponding to photon radiation. Electrical pulses from the output of the detector 2 receives the second input of the counter 4. Electrical pulses from the output of the detector 3 receives the second input of the counter 5. From the first output unit 4, the signal containing information about the number of registered electric pulses, is fed to the first input of the comparator 6, where it is compared with a given number of n0. Similarly, from the first output unit 5, the signal containing information about the number of registered electric pulses, is fed to the first input of the comparator 7. As the thickness of the area 17 of the controlled products less than the thickness of the section 18, the count of electrical pulses 4 accumulate the specified number of pulses n0faster than the counter 5. When the number of registered electric pulse counter 4 becomes equal to n0with the output of the comparator 6 is fed the control signal at the first input of the trigger 9, the counter 4 continues. With the arrival of the control signal to the input of BL is ka 9 with its output control signal is fed to the first input of the logical element “And”. Then, when the number of registered electric pulse counter 5 becomes equal to n0with the comparator output 7 control signal to the first input of the trigger 10. With the arrival of the control signal to the input unit 10 with its output control signal is fed to the second input of the logical element “And”. When the first and the second input unit 11 will receive the control signals from the trigger 9 trigger 10, respectively, with its output control signal as a third input of the counter 4, the third input of the counter 5, and the second input of timer 12, which stops their work. After the arrival of the control signal from block 11 counters 4 and 5 are electrical impulses and the timer 12 transmit information about the number of registered particles and the measurement time for decisive device 13. After the information is transferred, the counters 4 and 5 are electrical impulses and the timer 12 are set to zero. Also from the output unit 11, the control signal is fed as the second input unit 9 and to the second input unit 10, which returns the appropriate triggers in the initial state. Also from the output unit 11, the control signal is fed to the input of the control mechanism 14, which converts the platform 15 in the following discrete position.

The effectiveness of the proposed method radiometric monitoring and device for its implementation on which is based the following. Let the rate of electrical impulses acting on the output of a detector 2 and detector 3, the same and equal to: λ01020=105. The material sections 17 and 18 of the controlled products - concrete mass attenuation coefficient μ12=μ =0,074density ρ12=ρ =2,3. The thickness of the sections 17 and 18 of the articles in the direction of x-ray, respectively, h1=10 cm and h2=20 see the Specified number of registered electrical pulses is equal to: n0=104. Size of the aperture of the detector 2 and detector 3 is equal to 1 cm2. The pulse rate of the electrical pulses by the counter 4 is equal to λ10e-μ ρ h1=1,8· 104and the counter 5 -. Time τ1necessary to set a given number of pulses n0the counter 4 will be τ1==0,56, τ2necessary to set a given number of pulses n0counter 5 - τ2==3 C. Time control in one discrete position will be equal to max{τ1thatτ2}, that is, 3 S. the statistical component of the Rel the relative error of the count rate, due to the quantum nature of the radiation is determined by the formulawhere λmin- pulse rate of the electrical pulses by the counter corresponding to the detector aperture which corresponds to the area of the controlled products with maximum absorbency, λi- the rate of i-counter. Then the statistical component of the relative error of the counting rate of the counter 4 is equal towhile counterDuring the inspection of the product by the method of radiometric control, selected as a prototype for counter 4 and counter 5 statistical component of the relative error of the count rate determined by the formulawill be the same and equal to δ12=0,01. At the same time control in one discrete position will be equal to max{τ1that τ2}, that is, 3 C. Thus, when the control section 18 of the product by the claimed method and the method selected as the prototype, the statistical component of the relative error will be the same. When the control section 17 of the product of the inventive method the statistical component of the relative error is 2, 3 times less than in the control method, selected as a prototype. If this is the performance of the control will be the same.

In reality, the number of detectors can reach several hundred, which does not contradict the essence of the proposed method radiometric monitoring and device for its implementation.

The proposed technical solution can be implemented based on existing components and methodology radiometric control.

Computer experiments confirmed useful quality of the proposed method and device radiometric control. Currently preparing technical documentation for the manufacture of a prototype and testing it in the research laboratory of SSI “Institute of introscopy, TPU”.

1. A method of radiometric control, including the installation of a controlled product on the platform managed a discrete mechanism for scanning between the source of ionizing radiation and a block of m detectors, each of which has at its output a count of electrical pulses, the time dimension τmaxduring which the counter of one of the m detectors, the aperture of which corresponds to the area of the controlled products with maximum absorbency, will register a specified number of n0electrical impulses caused by photons or particles of ionizing radiation, the determination of the radiation thickness hγ phase is controlled zone products corresponding aperture of the detector, based on the ratio ofwhere μ, ρ and h, respectively, the values of mass attenuation coefficient of the radiation density and the linear thickness of the material for this section, k is the counting efficiency of the block detector count of electrical pulses, a N0- the intensity of the load detector in the absence of the product, n0- set the number of registered electrical impulses λ0- rate electric pulse counter detector in the absence of controlled products, λ - rate electric pulse counter detector in the presence of a controlled product, zeroing the contents of each of the m counters and moving the test object to a new position when the time τ≥τmax, characterized in that the electrical pulses of each of the remaining m-1 detectors shall be terminated at the time τ=τmaxand the values of radiation thicknesses hγieach of the other m-1 plots controlled zone products determine, based on the ratio ofwhere μithat ρihirespectively the values of the mass attenuation coefficient of the radiation density and linear material thickness, characterizarion the thickness of the area of the test object, corresponding to the aperture of the i-th detector from the set of m-1 detectors, kiaudit the effectiveness of the i-th detector is the i-th counter, N0ithe load intensity at the input of i-th detector in the absence of the product, ni- the number of electrical pulses registered by the counter i-detector for time τmaxthat λ0i- rate electric pulse counter with i-th detector in the absence of controlled products, λi- rate electric pulse counter with i-th detector in the presence of the test object.

2. A device for implementing the radiation-based control, containing a source of ionizing radiation, a block of m detectors, each of which has at its output a count of electrical pulses, the unit number n0, timer, m digital Comparators, crucial unit, the sensor of the beginning of the measurement cycle, the driven mechanism discrete scanning platform to install on it a controlled product, m triggers, having m inputs of the logical element “And”, and the output of each of the m detectors connected to the counting input of the corresponding counter of electrical pulses, the output of the sensor to the beginning of the measurement cycle is connected to the first control input of each of the m counters of electric pulses and the first is at the control input of the timer, the output of each of the m counters electrical pulses connected to the first input of the corresponding comparator output unit number n0connected to the second input of each of the m digital Comparators, the output of each of the m Comparators connected to the first input of the corresponding trigger, the output of each of m triggers connected to the appropriate input m - Vodolaga logical element “And”exit m - Vodolaga logic element And connected to the second input of each of m and triggers to the control input of the scanning mechanism, the output of the timer is connected to one input of a casting device, characterized in that the output of the m-way logic element And also connected to the second control input timer input stop the timer and reset its content and is connected to the second control input of each of the m counters of electric pulses input stop counting and reset the content, and the output of each of the counters of electric pulses is connected to the input of a casting device.



 

Same patents:

FIELD: measuring engineering.

SUBSTANCE: meter determines dielectric permittivity and thickness of the oil layer by measuring at two angles unequal to the Brewster angle.

EFFECT: simplified design and expanded functional capabilities.

3 dwg

FIELD: electrical measurements.

SUBSTANCE: device is proposed for measurement of dielectric and magnetic permeability as well as thickness of spin coatings on surface of metal and can be used in chemical industry for inspecting composition and properties of liquid and solid media. Electro-magnetic field is induced in body of dielectric material to be inspected which material is applied onto dielectric substrate, by means of sequent excitation of slow surface waves: two E-waves are excited at different, but having almost the same value, wavelengths λr1 and λr2 and one H-wave having wavelength of λr3. Attenuation of field intensity is measured t normal plane in relation to direction of wave propagation by means of receiving vibrators system for different values of base d between them. Normal attenuation factors αE1E2 and αH are found from ratio of E(y)= E0 exp[-α(y) y]. Magnetic and dielectric permeability and thickness of magneto-dielectric coating are found from relations of and where has to be phase coefficient of H-wave.

EFFECT: improved precision of measurement.

1 dwg

FIELD: MEASUREMENT TECHNOLOGY.

SUBSTANCE: electromagnet wave is induced by means of directed aerial. The wave is incident to dielectric plate. Brusterain angle of incident wave is defined from minimum value of reflected wave and value of dielectric permeability is calculated. Power of incident and reflected waves are measured and the value of reflectivity and specific conductivity are calculated as well as value of dielectric loss of dielectric plate. Then incident angle of electromagnet wave is increased till achieving value providing total internal reflection of electromagnet wave and attenuation of intensity is measured at normal plane relatively direction of wave propagation. Factors of normal attenuation and thickness of dielectric plate are calculated. Method allows to find complex dielectric permeability and thickness of dielectric plates free of dielectric substrates.

EFFECT: improved reliability.

1 dwg

FIELD: electronics.

SUBSTANCE: method includes recording number of particles emitted by radioactive layer on basis of number of voltage or current pulses recorded by counting device, then to measuring detector a flow of ionizing radiation is directed from calibrating standard electrode and also registered is number of particles, position of covered electrode is change no less than two times, by turning it in horizontal plane around its axis for arbitrary angle, while repeating measurement of pulses number, while measurement time is selected to be such that number of recorded pulses was no less than 3600 pulses for each measurement position, and then selection of necessary number of electrodes is calculated for forming electrode system in chamber.

EFFECT: higher precision, higher safety.

The invention relates to the field of nondestructive testing, namely, devices for measuring the shell thickness and distribution of the middle layer of fuel elements of nuclear reactors using ionizing radiation

The invention relates to the field of non-destructive testing of objects using x-rays

The invention relates to measuring technique and can be used as a portable measuring the thickness of a layer of oil

The invention relates to the field of measuring techniques, in particular x-ray method of measuring thickness distribution and chemical composition of the material, and can be used to control sheet, pipe and other rental directly to the mills for cold and hot rolling in the dynamics

The invention relates to the field of calibration of measuring and inspection equipment, in particular by means of automated diagnostic x-ray thickness gauges, and can be used to control sheet and structural shapes in the dynamics

The invention relates to x-ray measurement technology

FIELD: electronics.

SUBSTANCE: method includes recording number of particles emitted by radioactive layer on basis of number of voltage or current pulses recorded by counting device, then to measuring detector a flow of ionizing radiation is directed from calibrating standard electrode and also registered is number of particles, position of covered electrode is change no less than two times, by turning it in horizontal plane around its axis for arbitrary angle, while repeating measurement of pulses number, while measurement time is selected to be such that number of recorded pulses was no less than 3600 pulses for each measurement position, and then selection of necessary number of electrodes is calculated for forming electrode system in chamber.

EFFECT: higher precision, higher safety.

FIELD: MEASUREMENT TECHNOLOGY.

SUBSTANCE: electromagnet wave is induced by means of directed aerial. The wave is incident to dielectric plate. Brusterain angle of incident wave is defined from minimum value of reflected wave and value of dielectric permeability is calculated. Power of incident and reflected waves are measured and the value of reflectivity and specific conductivity are calculated as well as value of dielectric loss of dielectric plate. Then incident angle of electromagnet wave is increased till achieving value providing total internal reflection of electromagnet wave and attenuation of intensity is measured at normal plane relatively direction of wave propagation. Factors of normal attenuation and thickness of dielectric plate are calculated. Method allows to find complex dielectric permeability and thickness of dielectric plates free of dielectric substrates.

EFFECT: improved reliability.

1 dwg

FIELD: electrical measurements.

SUBSTANCE: device is proposed for measurement of dielectric and magnetic permeability as well as thickness of spin coatings on surface of metal and can be used in chemical industry for inspecting composition and properties of liquid and solid media. Electro-magnetic field is induced in body of dielectric material to be inspected which material is applied onto dielectric substrate, by means of sequent excitation of slow surface waves: two E-waves are excited at different, but having almost the same value, wavelengths λr1 and λr2 and one H-wave having wavelength of λr3. Attenuation of field intensity is measured t normal plane in relation to direction of wave propagation by means of receiving vibrators system for different values of base d between them. Normal attenuation factors αE1E2 and αH are found from ratio of E(y)= E0 exp[-α(y) y]. Magnetic and dielectric permeability and thickness of magneto-dielectric coating are found from relations of and where has to be phase coefficient of H-wave.

EFFECT: improved precision of measurement.

1 dwg

FIELD: measuring engineering.

SUBSTANCE: meter determines dielectric permittivity and thickness of the oil layer by measuring at two angles unequal to the Brewster angle.

EFFECT: simplified design and expanded functional capabilities.

3 dwg

FIELD: radiometric testing.

SUBSTANCE: counting of electric pulses of all the detectors stops simultaneously as soon as any detector registers no less than specified number of electric pulses caused by ionizing radiation.

EFFECT: improved reliability.

2 cl, 1 dwg

FIELD: non-destructive inspection.

SUBSTANCE: primary and secondary n detectors are made of multielement converting elements made of materials having different atomic numbers. Materials are disposed in detectors subsequently starting from lower number to higher ones. Converting elements of primary and secondary n detectors are electrically connected with inputs of (1+n) analog-to-digital converters. Primary detector is rigidly fastened to collimator of radiation source and is turned to item with side having been made of material with higher atomic number. Secondary n detectors are turned to item with sides having lower atomic number. Points of stop of discrete displacement of radiator with primary detector along the rail are coincided with radial directions being placed in the middle of radial directions which form sectors and cross the items at lateral cross-section through their longitudinal axis and centers of secondary n detectors. Value of equivalent atomic number of any layer of coating is calculated from algorithm introduced into processor.

EFFECT: improved precision of inspection.

1 dwg

FIELD: the invention refers to the field of non-destructive control of objects with using of x-ray radiation.

SUBSTANCE: the arrangement has a source of x-ray radiation, three detectors of radiation and a scheme of processing. The characteristic feature of the arrangement is using of detectors with three-sectional converting elements with different spectral sensitivity. The technical result of the invention is increasing of energetic resolution expanding functional possibilities conditioned simultaneous measuring of the thickness of sheet material out of ferrous and non-ferrous metals.

EFFECT: the invention provides high metrological parameters.

1 dwg

FIELD: inspection of dynamics of changes in cellular structures.

SUBSTANCE: method concludes angular collimation of α-radiation by means of Soller collimator, registration of energy spectrum of collimated flux of particles, determination of lateral structures from the shape of registered spectrum on the base of its mathematical model.

EFFECT: improved precision; improved speed of measurement.

3 dwg

FIELD: measurement technology.

SUBSTANCE: microwave electromagnetic fields of running surface slow E-waves and E1 and E2 at two wavelengths λosc1 and λosc2 of oscillator being close in value above dielectric-metal surface at single-mode regime. Damping factors αe1 and αe2 of electric field strength are measured at normal plane relatively direction of propagation of slow surface of wave. Real value of dielectric constant and thickness of coating are calculated. Taking measured values of damping factors into account, values of deceleration are calculated for those wavelengths by relation of Directional pattern maximum angle of inclination θdp max(fz)e1(e2) is measured at far zone by means of vertically oriented receiving vibrator. Length of dielectric coating le1 and le2 is determined from relation of le1(e2)=0.552·λosc e1(e2)/(νdf e1(e2)-cosθe1(e2) and its value l=(le1+le2)/2 is subject to averaging.

EFFECT: improved precision of measurement of longitudinal sizes of dielectric coating.

1 dwg

FIELD: non-destructive inspection; X-ray technology.

SUBSTANCE: device has X-ray radiation source, first and second radiation detectors, processing circuit and registrar. Detectors with different spectral sensitivities are used. The detectors are disposed one after another in such a way to make contact to each other at the side being opposite to where X-ray source is located.

EFFECT: improved precision of measurement; improved sensitivity.

1 dwg

Up!