| 摘要 |
FIELD: measurement technology, compton calculation tomography under conditions of one-way access to object of test. SUBSTANCE: device measuring density has first and second radiation sources, first and second detectors, formation and re-calculation unit, information processing unit, initial data unit, storage, mechanisms to move object, half-tone display, synchronization on unit, mechanism positioning sources and detectors, collimation unit with axial and peripheral collimation channels and mechanism to move collimation unit. Outputs of first and second detectors are connected correspondingly to first and second inputs of formation and re-calculation unit which first output is linked to first $$$ input of information processing unit and which second output is connected to second $$$ input of information processing unit and position outputs "pos.1" and "pos.2" of synchronization unit are connected to position controlling inputs "pos.1" and "pos.2" of positioning mechanism. Output of calculated value $$$ of density of information processing unit is connected to data input D of storage which first data output $$$ is connected to input of previous values of density $$$ of information processing unit. Input of initial conditions of its connected to output of initial data unit. Outputs of coordinates X, Y, Z of synchronization unit are connected to address inputs of storage and inputs of coordinates X, Y, Z of half-tone display which output of brightness channel is connected to second data input $$$ of storage. Controlling output to generate calculated value of density "out.$$$" of processing unit is connected to recording input "rec" of calculated value of density of storage. Output of enquiry of preceding values of density "enquiry $$$" of information processing unit is connected to input "read.1" of data reading of storage. Output "lead-out" of synchronization unit is connected to input "read. 2" of storage and input "rec." of half-tone display. Output $$$ of synchronization unit is connected to controlling input $$$ of mechanism to move collimation unit and outputs $$$ of same unit are connected to controlling inputs $$$ of mechanism to move object of test. Synchronization lead-out C of synchronization unit is connected to synchronizing inputs of mechanism to move collimation unit, formation and re-calculation unit and information processing unit. Output "max" of information processing unit is connected to input "initial position" of synchronization unit. There is another device differing from mentioned above by usage of radio isotope 181W with quantum energy 150.0 keV as first radiation source and radio isotope 153 Cd with quantum energy 100.0 keV as second radiation source. Inclination angle between channels of collimator is chosen equal to 45 deg. EFFECT: provision for layer by layer measurement of density of body as function of its thickness under conditions of one-way access to it. 1 dwg |
