EMC testing of military equipment on alternative measurement ranges
EMC testing of military equipment on alternative measurement ranges. Preparation of the PT-91M tank for electromagnetic compatibility tests in an abandoned railway tunnel.
Electronic systems used on the modern battlefield must meet a number of important requirements in order to operate efficiently and reliably even in the most difficult conditions. One of the most difficult issues is the electromagnetic compatibility (EMC) of all systems. This problem concerns both individual devices and entire complex products, such as military or military vehicles.
Criteria and methods for evaluating the emission of electromagnetic interference (EMI) and resistance to such phenomena for military equipment are defined in many standards, for example Polish NO-06-A200 and A500 or American MIL-STD-461. Due to the very strict requirements of military standards, such tests must be carried out on a special stand, in the so-called. anechoic chamber. This is mainly due to the need to isolate the device under test and the measuring equipment from the influence of an external electromagnetic field. The level of electromagnetic interference in urban areas and even in places remote from industrial facilities and settlements is often many times higher than the requirements in this regard, which military equipment must meet. Research on relatively small devices can be carried out in accessible laboratories, but what to do, for example, with a tank of several tens of tons?
Radiotechnika Marketing Sp. z oo specializes in electromagnetic compatibility (EMC) testing of large and complex objects, including combat vehicles and military equipment. Unusual structures such as large underground shelters or railway tunnels are successfully used for this purpose. The thick walls of such structures, often additionally covered with a layer of soil, allow them to isolate themselves from the external electromagnetic environment. However, it should be borne in mind that the environment of a shelter or tunnel differs significantly from the ideal conditions described by the standards. Carrying out tests on such objects requires very careful preparation of the object itself, measuring stands, equipment used, power supply and grounding, as well as the development of an appropriate test plan, which must be constantly adapted to existing measurement conditions. It is necessary to take a number of additional measures to eliminate or reduce the influence of an unusual place on the obtained measurement results.
