FIELD: machine building.
SUBSTANCE: gamma-flaw detector includes a composite protection unit in the form of a stationary one-piece cylinder equipped with an eccentric cavity and a collimation outlet opening and corresponding to the eccentric cavity of a turning rotor equipped by means of a protective rod-shaped holder with an emission source in the eccentric channel with a hole coaxial to the collimation opening, and device for rotor turning through 180°. On the drive half-axis of the rotor there reinforced is a gear with external engagement, the end surface of which is formed with an arc-shaped groove concentrically to its constituent surface; the above groove provides the possibility of its discrete rotation together with the rotor in the azimuth angle range of 180°, which is strictly restricted with a limit stop corresponding to the groove profile and made in the form of a cylindrical pin statically reinforced in the housing. The gear is constantly adjacent kinematically and in a reduced manner (reduction of not less than 2) to a sector of a gear wheel, which is polarised by means of a spring and reinforced on the corresponding axis with possibility of pendulum movements transmitted to it with a rotor turning device through the gear and providing the polarised power fixation of the rotor in diametrically opposite discrete positions of emission and overlapping of a radiation beam.
EFFECT: increasing safety and improving reliability of protective properties considering sanitary norms of radiation security, improving accuracy and reliability of the control method.
4 cl, 4 dwg
The invention relates to the field of materials research without their destruction, but rather for gamma radiography.
Known gamma-ray detectors for x-ray controlled objects, such as apparatus for radiographic inspection of products, conveyor belt source drum (revolving or rotary) type, providing a revolving supply source to the output window static protection unit, equipped with a concentric cavity for placement of a conveyor made in the form of a 180° rotatable drum containing in its channel the radiation source is placed on the end portion of the rod holder, and has a fixation mechanisms, control the rotation of the drum, and a locking device [Gamma-apparatus for radiographic inspection, U.S. patent No. 2891168, publ. 16.06.1959].
Known gamma-detector emitter containing block radiation protection installed on the bearings of the rotor for moving the radiation source from the safe position with the maximum absorption of radiation protective material in the position of the transmission, coaxial conical exhaust box, supplied with a corresponding removable obturator, and the emitter is equipped with automated controls and fixation of the rotor. [The emitter of gamma rays, U.S. patent No. 2984748, publ. 16.05.1961].
Naib is more similar in purpose and design is the gamma detector drum, in which the gamma radiation source is moved from the storage position to the position of scanning to collimation window when turning the drum by 180°, is placed in an eccentric cavity fixed block security [Apparatus for radiographic testing hollow articles, U.S. patent No. 2719926, publ. 04.10.1955].
Known flaw detector consists of a body made of a protective material, provided with an eccentric cylindrical cavity with an outlet window containing the corresponding fitted coaxially exhaust window channel with a source of radiation drum from a protective material made with the possibility of remote rotation and fixation in discrete positions by means of spring elements, and equipped with a mechanism to control the rotation of the drum, and a locking device.
The General disadvantages of the known flaw drum due to the inertia of the rotary drum and constructive play in kinematic pairs flaw is the lack of clear orientation of the radiation source in diametrically-opposite positions of scanning and storage, provoking the formation while the distorted flow direct and multiply scattered radiation, respectively, from the local diffusion and leakage of scattered radiation and the channel of the rotary drum in the boundary zones of its junction with the array static block of biological protection and outlet ports (collimator) guaranteed by design clearances rolling and static components protection, which entails the possibility of increasing the radial loads on the staff and is reflected in the safety of the method of control.
At the same time fuzzy fixing heater collimating Windows in the radiographic studies does not provide the necessary statistical significance in the comparison of control results in an unstable geometry of the distribution of dose field.
The technical result obtained by the proposed device is to improve the safety and reliability of the protective properties with the sanitary rules of radiation safety, as well as the validity and reliability of the method of control by modifying the kinematics of fixed movements of the radiation source in the release position and overlap of the beam with the formation of compensating protective mazes when the overlap of the beam of radiation.
This technical result is achieved due to the fact that gamma-ray detector containing precast block protection in the form of a stationary cylinder, provided with an eccentric cavity and collimation output window, and the corresponding cavity of the rotatable rotor, equipped by protective rod holder radiation source in an eccentric channel opening, coaxially collimation window, the means of rotation of the rotor by 180°, at the leading of the axis of the rotor fortified gear wheel with external toothing, the face surface of which is concentric with its forming surface shaped arcuate recess to enable discrete rotation together with the rotor in the range of the azimuthal angle of 180°, strictly limited to the relevant profile seizure focus, made in the form of a cylindrical finger statically fixed in the housing, and gear kinematically reducyrovana (reduction of not less than 2) constantly paired with polarized by the spring tension of the sector gear mounted on a respective axis with the possibility of pendulum movements reported to it by means of rotation of the rotor through the gear and providing a polarized power fixation of the rotor in diametrically opposite the discrete positions of the release and blocking a beam of radiation, and in the described detector specified technical result is obtained in the case when the gear wheel with external toothing mounted on the leading axis of the rotor, with the possibility of adjustment of the working position of the rotor according to the azimuthal location locally perforated holes in it relative to the output collimating open and shaped arcuate grooves on the face surface of the gear, which is moznosti of rotation of the rotor in the range of the azimuthal angle of 180°, and also in the case when the rod holder is attached to a radiation source made with the possibility of limited displacement along the axis of the eccentric channel of the rotor relative to the holes in the channel with the formation of the protective maze in the initial state of the rotor in an overlapped beam of radiation, for which a peripheral part of the protective rod holder outside the channel of the rotatable rotor provided with an annular groove, kinematically associated with a statically fixed to the chassis spatial profiled Cam whose profile is consistent with the trajectory and the program relative displacements of the source holder during rotation of the rotor in the range of the azimuthal angle of 180°, and the angle of ascent profile is proportional to the axial displacement of the rod holder with the radiation source and when the peripheral surface of polarized sector gear provided with a groove, configured to lock the latch locking device in its original state.
The proposed device (gamma detector) is shown in figure 1, 2, 3 and 4.
The device includes a housing 1, a stationary protection block 4 with the output collimation window 3, an eccentric cavity 2 to accommodate the rolling of the rotor 5, containing in turn in the channel with a hole 8, the radiation source 7 and protection of the hydrated rod holder 6, the peripheral portion of which is provided with the annular groove 19 and kinematically associated with a statically fixed to the housing 1 spatial shaped Cam 20. The device also includes means of rotation of the rotor 9 and is equipped with a kinematic pair of polarized fixation of the rotor in diametrically opposite the discrete positions of the release and blocking a beam of radiation in the form of arcuate shaped recess 13 of the gear 17, fortified with alignment on the axis of the rotor 16 and provides an exceptional opportunity of rotation of the rotor 5 in the range of the azimuthal angle of 180°, strictly limited to the relevant profile seizure focus in the form of a cylindrical finger 12, statically fixed in the housing 1, and the gear 17 while kinematically reducyrovana (reduction of not less than 2) constantly paired with polarized by means of spring tension 15 sector gear 10, mounted on the axis 11 with the possibility of discrete-fixed pendulum movements reported to it by means of rotation of the rotor 9 through the gear 17. Device provided with means for locking the leading axis of the rotor 16 and the rotor 5 in the initial state (at the blocked beam), respectively, in form of lock 14 with the key 21 and the retainer 18, the respective groove 22 on the peripheral surface of polari is consistent sector 10.
The device operates as follows.
The device body 1, provided with a cavity containing 2 and collimation output window 3 stationary protection block 4 and the corresponding cavity rotating the rotor 5, is equipped with a rod holder 6 with the radiation source 7 in the channel with a hole 8, coaxially collimation output window 3, with means of rotation of the rotor 9 are transferred to the control object, locked by the lock 14. Then the key 21 open lock 14 and when this will unlock the sector 10 through the output latch 18 from the groove 22. By means of rotation 9 lead leading the axis of the rotor 16 with fixed gear 17 and the rotor 5 is rotationally driven in the range of the azimuthal angle of 180°, strictly limited corresponding to the profile of the recess 13 a focus in the form of a cylindrical finger 12. This combines the axis of the hole channel 8 of the rotor 5 with the output collimation window 3, and polarized by means of spring tension 15 sector gear 10 through the gear 17 provides guaranteed power fixation of the rotor 5 in the release position of the radiation beam. Simultaneously with the rotation of the rotor 5 includes a radiation source 7 protective rod holder 6, the peripheral portion of which is provided with the annular groove 19 and kinematically associated with a statically fixed to the body 1 of the spatial to the Cam 20, interacts with its profile relative reciprocal movement, providing strictly coordinated a limited axial displacement of the radiation source 7 from the position of the maze of storage in the channel 8 to its outlet opening, coaxially collimation window 3, and lock it in this state, excluding the possibility of arbitrary play of the emitter in the working position on the exposure time.
After the exposure time the rotor 5 lead to the initial state by means of rotation 9 leading through the axis of the rotor 16 with fixed gear 17 at the expense of the return rotational movement range of the azimuthal angle of 180°, strictly limited corresponding to the profile of the recess 13 a focus in the form of a cylindrical finger 12, and polarized by means of spring tension 15 sector gear 10 through the gear 17 provides guaranteed power fixation of the rotor 5 in the initial position blocked by the radiation beam. Simultaneously with the return of the rotor 5 to the initial position is equipped with a radiation source 7 protective rod holder 6, the peripheral portion of which is provided with the annular groove 19 and kinematically associated with a statically fixed to the housing 1 spatial Cam 20, interacts with its profile, provides a limited axial displacement is of ergates 6 from the radiation source 7 from the position of scanning of the output window channel 8, coaxial collimation output window 3, and fix it in the maze storage channel 8, excluding the possibility of arbitrary play of the emitter at the time of overlap of the beam of radiation.
When the manipulation of the operator by means of rotation of the rotor 9 kinematic securing devices provide a logically consistent with the operator's actions force the fixation of the rotor 5 in two diametrically opposite discrete positions. In the hard mode of the algorithm when this is achieved the fixed displacement of the emitter relative to the outlet ports of the rotor, resulting in a clear orientation of the radiation source in diametrically-opposite positions of scanning and storage without distorting the flow of direct radiation, local diffusion and leakage of scattered radiation from a channel of the rotary drum in the boundary zones of his mates, which excludes the possibility of increasing the radial loads on the staff, and increases the security method of control.
At the same time exclude unwanted distortion of the collimated radiation beam and is provided with regularly recurring stable distribution chart dose field that determines the quality of radiographic testing method.
1. Gamma-ray detector containing precast block protection in the form of monolithic institutional the ary cylinder, provided with an eccentric cavity and collimation output window, and the corresponding eccentric cavity of the rotatable rotor, equipped by protective rod holder radiation source in an eccentric channel opening, coaxially collimation the window, and the means of rotation of the rotor by 180°, characterized in that the leading axis of the rotor fortified gear wheel with external toothing, the face surface of which is concentric with its forming surface shaped arcuate recess to enable discrete rotation together with the rotor in the range of the azimuthal angle of 180°, strictly limited to the relevant profile seizure focus, made in the form of a cylindrical finger statically fixed in the housing, and gear kinematically reducyrovana (reduction of not less than 2) constantly paired with polarized by the spring tension of the sector gear mounted on a respective axis with the possibility of pendulum movements reported to it by means of rotation of the rotor through the gear and providing a polarized power fixation of the rotor in diametrically opposite the discrete positions of the release and blocking a beam of radiation.
2. Gamma flaw detector according to claim 1, characterized in that the gear wheel with external toothing fortified ve on the current axis of the rotor, with the possibility of adjustment of the working position of the rotor according to the azimuthal location locally perforated holes in it relative to the output collimating open and profiled arcuate grooves on the face surface of the gear to provide rotation of the rotor in the range of the azimuthal angle of 180°.
3. Gamma flaw detector according to claim 1, characterized in that the rod holder connected with the radiation source made with the possibility of limited displacement along the axis of the eccentric channel of the rotor relative to the holes in the channel with the formation of the protective maze in the initial state of the rotor in an overlapped beam of radiation, for which a peripheral part of the protective rod holder outside the channel of the rotatable rotor provided with an annular groove, kinematically associated with a statically fixed to the chassis spatial profiled Cam whose profile is consistent with the trajectory and the program relative displacements of the source holder during rotation of the rotor in the range of the azimuthal angle of 180°, and the angle of ascent profile is proportional to the axial the displacement of the rod holder with the radiation source.
4. Gamma flaw detector according to claim 1, characterized in that the peripheral surface of polarized sector gear provided with a groove, configured to lock the latch locking device in the initial state.
SUBSTANCE: device has a source of monochromatic neutrons and accompanying monochromatic α-particles and an α-particle detector enclosed in a vacuum chamber, a γ-radiation detector and recording electronic circuitry. The device is in form of two portable units - an inspection unit and a control unit - connected to each other, wherein the inspection unit includes a source of labelled monochromatic neutrons and accompanying monochromatic α-particles, an α-particle detector, γ-radiation detectors and recording electronic circuitry; the γ-radiation detector is placed at an angle close to 45° from the direction of flux of the labelled monochromatic neutrons, perpendicular to the near plane of the unit, and is provided with protection from the flux of labelled monochromatic neutrons, wherein the device is provided with an additional external γ-radiation detector which is connected to the inspection unit; both γ-radiation detectors are based on BGO crystals; laser line generators are configured to indicate on the inspected object overall dimensions of the region exposed to flux of labelled monochromatic neutrons; spectrometer channels of both γ-radiation detectors are fitted with a thermal correction system consisting of thermal sensors mounted on BGO crystals in thermal contact with said crystals, an amplitude-digital converter and a single-board minicomputer, wherein the thermal sensors are connected by a communication line and a power line to the amplitude-digital converter, which is connected to the single-board minicomputer, which is connected to the power supply system of the device and the control unit.
EFFECT: high luminosity, sensitivity of the device, high energy resolution of the spectrometer channel for detecting gamma-radiation and fewer errors associated with thermal correction of gamma-spectra.
3 cl, 3 dwg
SUBSTANCE: apparatus for determining characteristics of material of analysed object has a first and a second bogie, each having a source of penetrating X-rays, having a collimator for forming a narrow beam directed onto the analysed object, at least one motor which is configured to move each bogie relative the analysed object so as to move the narrow beam relative the object in a direction having a vertical component and at least one sensor for detecting radiation back-scattered from the analysed object and generated by at least one of the radiation sources.
EFFECT: enabling design of a scanning system which combines high quality of images formed with high efficiency.
16 cl, 17 dwg
FIELD: measurement equipment.
SUBSTANCE: detector module for measurement of one or more types of radiation includes detection unit consisting of scintillation detector (10) and photodetector (20) providing electronic pulses being in known communication with intensity of light generated with scintillation detector, analogue-to-digital converter (ADC) (50) connected to photodetector; at that, ADC converts analogue output signal of photodetector to digitised radiation signal, information processing device (40) connected to ADC; at that, information processing device implements the method of calibration, stabilisation and linearisation of digitised radiation signal, and network interface (30a) of communication; at that, information processing device implements the transfer method of calibrated, stabilised, linearised and digitised radiation signal through network communication interface to the analysis device.
EFFECT: providing the possibility of creating the detector system allowing the centralised performance of supervision of several places using several detector systems, as well as providing the possibility of creating the detector system that allows supervising the single position or place using several different detector systems, which allows centralised performance of the measurement analysis.
14 cl, 3 dwg
SUBSTANCE: broadband soft X-ray spectrometer has a sealed housing in which there are detection channels, each having, arranged in series on the direction of radiation, an entrance slit, a selective filter, a region bounded by two total external reflection (TER) mirrors and an X-ray detector, wherein the detection channels are arranged quasi-parallel, wherein the TER mirrors are merged into one bundle by a common housing; the entrance slit is common for the whole bundle, and the X-ray detector used is a photographic recorder or a CCD matrix.
EFFECT: high spectral selectivity of the device, easier operation of the spectrometer owing to interdependent adjustment of the detection channels of the spectrometer on the radiation source, and compactness of the device and reduced weight and size due to fewer fastening elements.
3 cl, 5 dwg
SUBSTANCE: mobile gamma-ray flaw detector has a radiation shielding unit, a radiation head with a radiation source, a removable drum-type collimator, a drive for rotating the collimator and the light source, wherein the flaw detector is configured to divide component units in operating and non-operating state, wherein during transportation and storage the radiation shielding unit is placed a special protective container and has a removable cap with a fixing apparatus for preventing unauthorised opening; there is an additional removable handle with a flywheel and movable plugs for capturing, extracting and holding the radiation shielding unit and a removable holder with elements for fastening the gamma-ray flaw detector to the customer equipment, and the light source used is a laser module with mechanical adjustment for aiming the gamma-ray flaw detector, having self-contained power supply.
EFFECT: easier transportation of the gamma-ray flaw detector, versatility during use thereof, high safety when operating the gamma-ray flaw detector and high reliability of determining structure and defects using said gamma-ray flaw detector.
SUBSTANCE: immunological and ray examinations of intramammary lymph nodes of bronchopulmonary group are conducted. It is combined with Diaskin-test integrated with advanced tuberculin diagnosing and determination of a specific antibody titre. If observing positive results and the absence of X-ray pattern changes, multispiral computed tomography (MSCT) is conducted. A disturbed structure of the root of lungs requires MSCT with angiography. A size gain of the intramammary lymph nodes more than 0.5 cm at density more than +0.25 HU, tuberculosis of the intramammary lymph nodes of bronchopulmonary group is diagnosed.
EFFECT: diagnosing tuberculosis of the intramammary lymph nodes of bronchopulmonary group in children.
SUBSTANCE: qualitative and quantitative direct determination of content of elements with molar mass less than 23 in inorganic materials is carried out by association analysis of multivariate data superposed on spectra obtained by exposing the materials to X-rays, and specifically using a spectral range between 5 keV and 22 keV.
EFFECT: enabling analysis using a reliable and accurate direct determination of content of carbon in steel and alloys in non-destructive inspection conditions, without the need to switch off equipment and with possibility of use in operating conditions.
6 cl, 3 dwg, 1 tbl
SUBSTANCE: hose-type gamma-ray flaw detector for radiographic inspection of industrial articles has a guide tube-fitted radiation head with a housing, a blocking system with a lock and a shielding unit made of material which efficiently attenuates gamma-radiation, with combination of axial and spatially curvilinear channels, for accommodating a movable radiation source which is mounted on the end part of an elastic holder which has in its tail part an element for connection to the winding wire-fitted elastic conveyor of a remote control drive with connecting and receiving spouts, a remote drive for controlling movement of the holder of the source, fitted with a turning mechanism for a gear wheel which is interfaced with the conveyor; wherein the radiation source, which is attached to the holder, is oriented in the storage position symmetrically with respect to the input and output of the spatially curvilinear channel, and the conveyor is made on a single elastic base of a metal cord of a flexible shaft in form of a combination of two head and drive sections, wherein the head section of the conveyor lying in the connecting spout, which is connected to the holder of the source is made smooth by the value of the length of transportation on the spatially curvilinear channel and the guide tube, without coiling and equivalent to the diameter of the gear wheel of the drive section of the conveyor, is compensated by a uniform extrusion coating of a plastic compound based on a high-molecular weight wear-resistant polymer with a low coefficient of friction, e.g., a molybdenum disulphide-filled fluoroplastic; and the drive section, which is kinematically interfaced with the gear wheel of the control drive, is usually provided with a winding wire for the corresponding length for engaging the gear wheel.
EFFECT: high reliability and safety of the device.
3 cl, 3 dwg
SUBSTANCE: invention relates to analytical chemistry. Disclosed is a complexing sorbent which is obtained by impregnating the surface of cellulose filters with organic complexing reagents selected from thiophene-2-carbaldehyde thiosemicarbazone or 5-nitrothiophene-2-carbaldehyde thiosemicarbazone. The sorbent is efficient for concentrating heavy metals from solutions for subsequent X-ray fluorescence determination.
EFFECT: obtaining a sorbent having high sorption capacity for a wide range of aliovalent ions and capacity for both individual and group extraction of heavy metals.
3 cl, 2 tbl, 2 dwg
SUBSTANCE: object is scanned by radiation point source beam to register intensity of radiation passed through control object with the help of matrix of detectors and process obtained data by computer to be recovered on the basis of object internal structure. Note here that flat-field collimators are used to form directed radiation flow with shape retracing controlled part contour. Control object is displaced in axis perpendicular to collimator plane to connect point source with collimator centre to delineate controlled part. Radiation intensity is registered by appropriate detectors arranged along axial lines of collimator flat-fields.
EFFECT: higher efficiency, accuracy and reliability, simplified process and implementation.
FIELD: measurement technology.
SUBSTANCE: several γ-radiation sources are mounted onto closed frame of balance. Corresponding γ-ray detectors are mounted under the frame. Transporter is placed between detectors and sources. Output voltages U0 and Ui of γ-ray detector are measured at presence and absence of material. Values of U0 and Ui are introduced into data processing unit which is connected γ-ray detector. Speed Vi of transporter-placed transportation tape is measured by means of meter and value of Vi is introduced into data processing unit which is connected with speed meter. Total weight W of materials subject to transportation during specific period of time is calculated from relation Differences in nuclear weights are specified by the fact that value of K factor using for calculation of formula F=K*Ln(Ui/U0) can be calibrated depending on changes in loads of materials, different positions of materials located onto the band of transporter, different shape of accumulation of materials and dissipation factor.
EFFECT: improved precision of measurement.
7 cl, 10 dwg
FIELD: nondestructive testing.
SUBSTANCE: method can be used for checking passenger's luggage and aviation and naval containers. Method concludes in generating electron beam in pulse forming unit. Current pulses are injected in structure accelerating electron beam. High-frequency pulses are generated inside the unit and passed to electron beam accelerating structure followed by bombardment of conversion target with flow of accelerated electrons. Accelerating structure operating in running wave mode is used as accelerating structure. Electron beam current pulse amplitude when generating in electron beam current pulse forming unit and values of high-frequency power pulse frequency in high-frequency power pulse forming unit are to be changed simultaneously. Device for irradiating conversion model has electron beam current pulse forming unit which has outputs connected with first input electron beam accelerating system through injector. Accelerating structure is made for bombarding conversion target with accelerated electron flow. Device also has high-frequency power pulse forming unit which has output connected with second input of electron beam accelerating system. Electron beam accelerating structure is made in form of accelerating structure operating at running wave mode. Electron beam current pulse forming unit has at least one synchronizer which has control output connected with control input of high-frequency power pulse forming unit. At least one synchronizer is made for simultaneous change of frequency of high-frequency power pulses at output of high-frequency pulse forming unit and value of change in electron beam current pulse amplitude at output electron beam current pulse forming unit.
EFFECT: improved degree of sensitivity relating to selection of material.
9 cl, 5 dwg
FIELD: investigating or analyzing materials.
SUBSTANCE: focusing monochromator comprises rectangular plate made of metal provided with parallel stiffening ribs arranged over the width of the plate. The faces of the stiffening ribs are provided with reflecting plates made of monocrystal.
EFFECT: reduced cost.
FIELD: investigating or analyzing materials.
SUBSTANCE: method comprises generating fast neutron pulse, forming slow neutron flux from it, irradiating the object to be checked by the pulse flux of slow neutrons, and recording the instantaneous fast neutrons of fission, which indicates the presence of fission materials in the object. The fast neutrons are generated by irradiating a target-converter by the pulse flux of electromagnetic radiation whose energy exceeds the energy threshold of photon-neutron reaction.
EFFECT: enhanced efficiency.
5 cl, 3 dwg
FIELD: mechanical engineering; radiation method of inspection of materials and items.
SUBSTANCE: centering mount has housing inside which the laser is disposed as well as first reflector mounted onto axis of laser in front of exit window of X-ray radiator is the point where axis of laser crosses axis of X-ray beam, second reflector mounted onto axis of laser outside the projection of exit window of X-ray reflector for rotation relatively axis being perpendicular to plane formed by axes of laser beam and X-ray. Device also has aids for indicating focal length made in form of pointer provided with scale fixed onto housing of centering mount. Flat collimated laser beam forming system is mounted in front of laser. Laser beam propagates along plane being parallel to vertical plane crossing longitudinal axis of X-ray radiator. The axis is at the same time perpendicular to vertical plane crossing axis of X-ray beam. The second reflector is mounted at the exit of system at laser axis. Beam splitter is mounted between first and second reflectors. In front of the beam splitter there is the second semiconductor laser which is mounted onto axis being perpendicular to axis of laser to cross its point of crossing with beam splitter.
EFFECT: improved precision of measurements; simplified application.
FIELD: inspection aids.
SUBSTANCE: device has first modular cabin unit inside which radiation source in mounted for generating penetrating radiation beam to penetrate inspected container, second modular cabin unit inside which detectors are mounted for detecting penetrating radiation beam through inspected container as well as for forming corresponding radiographic signals. First and second units are disposed at some distance to each other to form inspection aisle. Modular portal unit is connected with first modular cabin unit and second modular portal unit to form portal frame made for finding at embracing position above the container inspected. Portal frame moves in accordance with inspected container along inspection aisle. First modular cabin unit, second modular cabin unit and modular portal unit are made as separate modular units connected together for disconnection in inspection area.
EFFECT: ability of quick mounting and dismounting of device; simplified design.
10 cl, 2 dwg
FIELD: measuring engineering.
SUBSTANCE: method comprises recording the flux of slow neutrons, which are generated by irradiating a matter to be tested by fast neutrons from a source, with the use of two groups of detectors-counters of slow neutrons whose maximums of the spectral sensitivity are spaced within the energy range of the moderate neutrons, e.g., with the use of a cadmium filter, measuring the output signals from each group of detectors in the absence of the material to be tested and after supplying material with known humidity, and determining humidity of the material from the formula proposed.
EFFECT: reduced error of determining humidity.
FIELD: analysis of water and organic solutions.
SUBSTANCE: sensor has multi-channel structure in form of length 1 of poly-capillary pipe with through capillary, forming micro-channels, which are filled with two layers of non-mixing substances. One layer 4 is formed by water or water solution and other 3 - by organic substance. In first of said layers into micro channels micro-granules 5 of absorbent are placed.
EFFECT: higher efficiency, lower costs.
27 cl, 14 dwg
FIELD: examination of baggage; customs inspection.
SUBSTANCE: according to the method, the object should be inspected inside one local area G (m). Detection unit is divided to lower and higher degrees of inspection. Coordinates of local area are determined at lower degree of inspection; electron diffractometer is oriented to the local area at higher degree of inspection. Explosives can be detected, for example, by using x-ray diffraction analysis. Electron diffractometer has collimating-detection system, which can be regulated, in height and in side direction at higher degree of inspection. Diffractometer also has X-ray radiation source, which is matched with collimating-detection system, which can be oriented at side direction. Collimating-detection system has one collimator max and one detector. Collimator is provided with conical widened slit, which reproduces preset angle Θ of dissipated radiation.
EFFECT: higher speed of detection of prohibited luggage.
14 cl, 6 dwg
FIELD: medical engineering.
SUBSTANCE: method involves forming X-ray radiation flow, letting pass it through filter transparent mainly for high power radiation spectrum portion of X-ray tube. The filter is mounted in front of volume under study. The X-ray radiation flow is directed to transducers for recording X-ray radiation quanta. Data are read from the transducers and image is built by applying computer software. An additional X-ray radiation flow is let pass through the filter transparent mainly for low power radiation spectrum portion of X-ray tube and mounted in front of volume under study. Another embodiment of the invention is characterized with scanning X-ray radiation flow being produced. High power radiation spectrum portion is directed to a transducers row for recording X-ray radiation quanta. X-ray radiation flow is additionally let pass through the filter transparent mainly for low power radiation spectrum portion of X-ray tube and mounted in front of volume under study. The X-ray radiation flow is directed to an additional transducers row for recording X-ray radiation quanta set in parallel to the available row.
EFFECT: high quality of diagnosis.