The antitank mines have diameter of about mm, and the average diameter of the anti-personnel mine amounts to 75 mm. In the course of further research, the mock-up of the mine detector MiRascan underwent modernization. Mock-up of MiRascan mine detector. It amounts up to 10 mW, which provides for the complete safety of staff. As previously mentioned, the induction loop of the metal detector was located on the butt end of the antenna of the ground penetrating radar, which provides spatial coincidence of received images from two channels of the mine detector.
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Microwave images of mine mock-ups in the examined lane with sandy soil. Diagram of mines arrangement in the proving ground. MiRascan ground-probing holographic radar that makes it possible to detect and identify slightly deepened up to 20 cm objects by their shape has miraxcan developed in the Remote Sensing Laboratory.
Power emitted by the generator on each frequency is switched in sequence. On the lower flange of the GPR cylindrical antenna, the head of the metal detector was installed; On the upper flange of the radar antenna, a generator metal detector block was installed; On the axes of chassis front wheels of the mine detector the electrical motors working in the impulse mode were installed; Remote control system of the mine detector movement was assembled.
The antitank mines have diameter of about mm, and the average diameter of the anti-personnel mine amounts to 75 mm.
RSLab | Projects | MiRascan Holographic Transducer for Mine Detection
As previously mentioned, the induction loop of the metal detector was located on the butt end of the antenna of the ground penetrating radar, which provides spatial coincidence of received images from two channels of the mine detector. The minefields are combined as a rule, which means that they include both antitank and anti-personnel mines. In the course of further research, the mock-up of the mine detector MiRascan underwent modernization. Its signals are received in two polarizations.
Some types of the mines contain practically no metal, which substantially impedes their detection.
The major part of the mines has round cross-section view. Basic features of it were as follows: The images of two PMN-2 antipersonnel mines in chernozem.
The radar has five operational frequencies in the range from 1. The images of MS-3 booby trap in chernozem. Mock-up of MiRascan mine detector. The operator mirasca the remote control box, connected to the cart by the cable of 15 m length, exercises control over the movement of the mine detector.
A general view of the newest model MiRascan mine detector being used during experiments is presented in figure.
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Thus, relative permittivity er for the typical explosives is between 3. The successive reception of signals on each frequency and in both polarizations of GPR and from the metal detector is conducted in the process of scanning the ground surface. The detector’s sensor was installed on the cart, which was set in mirascn by an operator manually. The principle of the multifrequency sounding of the condensed media construction structures, soils, etc.
Operating frequency of the metal detector is 2 MHz, and the diameter of the induction loop is equal to mm. In this case the key give-away factor lies in the blasting charges of the mines, the dielectric properties of which differ from analogous characteristics of the ground that covers them.
In the initial segment of this work, the mock-up of a wide-span mine detector MiRascan, which included, in the capacity of a detecting element, a five frequencies ground penetrating radar receiving signals in two crossed polarities. The images of glass and plastic bottles filled with water in sand.
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At the mirasca time dielectric properties of the ground in the considered frequency range vary within a wide range from 2. The images of Russian antitank mine type TMM. The lowest value of the range is related to absolutely dry sand, which is found in the desert. The frequency switching rate is such that it provides for the spatial matching for all microwave images of the GPR separate frequencies and metal detector image.
It amounts up to 10 mW, which provides for the complete safety of staff.
In the overwhelming majority of cases er for the ground exceeds the analogous value for the blasting charge.