Its signals are received in two polarizations. Microwave images of mine mock-ups in the examined lane with sandy soil. 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. The radar has five operational frequencies in the range from 1. Thus, relative permittivity er for the typical explosives is between 3. The detector’s sensor was installed on the cart, which was set in motion by an operator manually. Power emitted by the generator on each frequency is switched in sequence.
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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 principle of the multifrequency sounding of the condensed media construction structures, soils, etc. In the initial segment of this work, the mock-up of a wide-span mine miirascan MiRascan, which included, in the capacity mriascan a detecting element, a five frequencies ground penetrating radar receiving signals in two crossed polarities.
The antitank mines have diameter of about mm, and the average diameter of the anti-personnel mine amounts to 75 mm. The detector’s sensor was installed on the cart, which was set in motion by an operator manually. A general view of the newest 4.00 MiRascan mine detector being used during experiments is presented in figure. 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.
The images of glass and plastic bottles filled with water in sand. Diagram of mines arrangement in the proving ground. Thus, relative permittivity er for the typical explosives is between 3. Operating frequency of the metal detector is 2 MHz, and the diameter of the induction loop is equal to mm. The major part of the mines has round cross-section view.
The minefields are combined as a rule, which means that they include both antitank and anti-personnel mines. Mock-up of MiRascan mine detector. 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 course of further research, the mock-up of the mine detector MiRascan underwent modernization.
At the same time dielectric properties of the ground in the considered frequency range vary within a wide range from 2. Basic features of it were as follows: In the overwhelming majority of cases er for the ground exceeds the analogous value for the blasting charge.
The radar has five operational frequencies in the range from 1. The images of two PMN-2 antipersonnel mines in chernozem. The lowest value of the range is related to absolutely dry sand, which is found in the desert.
Microwave images of mine mock-ups in the examined lane with sandy soil. MiRascan ground-probing holographic radar that makes it possible to detect and identify slightly deepened up to 20 cm objects by their shape has been developed in the Remote Sensing Laboratory.
Its signals are received in two polarizations. Power emitted by the generator on each frequency is switched in sequence.
As previously mentioned, the induction loop of the metal detector was located on the mirasacn end of the antenna of the ground penetrating radar, which provides spatial coincidence of received images from two channels of the mine detector.
The successive reception of signals on each frequency and in both polarizations of GPR and mmirascan the metal detector is conducted in the process of scanning the ground surface. The images of MS-3 booby trap in chernozem. The operator via the remote control box, connected to the cart by the cable of 15 m length, exercises control over the movement of the mine detector.
Some types of the mines contain practically miirascan metal, which substantially impedes their detection. It amounts up to 10 mW, which provides for the complete safety of staff. The images of Russian antitank mine type TMM.